Index Catalog // Scholar@UC

Poison (Acid Mix)

Type:: Media
Description/Abstract:: A meditation on pollution. Based on treatments of footage I produced and shot for the Los Alamos National Labs on the subject of Radioactive Waste Water Treatment.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 03/06/2016
Date Modified:: 03/12/2019
Date Created:: 1991
License:: All rights reserved

Pumpkin Heart

Type:: Media
Description/Abstract:: Performance by Carl Stewart. Carl wears a suit made of Camel packs, all of which he smoked. Filmed in the garden at his house in Rye, NY, wearing a pumpkin head which he grew. Inspired by Marlon Brando’s portrayal of the death of Vito Corleone. Dearly loved by me, this video exists somewhere outside of my other artworks and was never publicly exhibited.
Creator/Author:: Woodman, Charles and Stewart, Carl
Submitter:: Charles Woodman
Date Uploaded:: 03/06/2016
Date Modified:: 03/12/2019
Date Created:: 1983-03-06
License:: All rights reserved

viDEO saVant Presents Lateral Thinking at Autumedia (Performance Documentation)

Type:: Media
Description/Abstract:: I was commissioned by Andy Marko of Semantics Gallery in Cincinnati to create a live show as the concluding event for his annual Autumedia Festival. The space at Semantics was filled with other work in the show, so he approached Third Party, another artist run space down the street, to host the performance. I sent a general call out to friends at CCM looking for improvising musicians with the idea of forming a fairly large ensemble. I had a a number of responses and the musical group was ultimately made up of Regan Brown (Bass Clarinet), Dave McDonnell (Sax and Electronics), Carrie Magin (Percussion), Steve Weimer (Keyboard), and Zach Larabee (Drums). I also invited Loraine Wible, former student and previous collaborator, with Discerning Crane, to contribute a second stream of images. When we got to the space I decided to throw Loraine's images obliquely across the long wall with mine in the center.
Creator/Author:: Brown, Regan; Weimer, Steve; Woodman, Charles; Magin, Carrie; Larabee, Zach, and McDonnell, Dave
Submitter:: Charles Woodman
Date Uploaded:: 03/06/2016
Date Modified:: 03/12/2019
Date Created:: 2012
License:: All rights reserved

Dharma Pops

Type:: Media
Description/Abstract:: A meditation on the pleasures of observation. Image music and text weave in a multi-layer dance. Images built around a pre-recorded soundtrack. Text: Jack Kerouac Music: Michael Fiday Image: Charles Woodman Performers: Carla Kihlsteadt, Graeme Jennings (violins) Narration: Matthias Bassi
Creator/Author:: Kerouac, Jack, 1922-1969; Bassi, Matthias; Jennings, Graeme; Kihlsteadt, Carla; Woodman, Charles, and Fiday, Michael
Submitter:: Charles Woodman
Date Uploaded:: 03/06/2016
Date Modified:: 05/07/2019
Date Created:: 2014
License:: All rights reserved

viDEO saVant Presents Lateral Thinking at 21C Museum/Hotel (Performance Documentation)

Type:: Media
Description/Abstract:: Performance organized in conjunction with Passages, my one-person show at the Weston Art Gallery in Cincinnati. Suzanna Barnes (violin) Regan Brown (winds & autoharp) Zach Larabee (percussion) David McDonnell (electronics & horns) Loraine Wible (images) Charles Woodman (images)
Creator/Author:: Brown, Regan; Woodman, Charles; Wible, Loraine; Barnes, Suzanna; Larabee, Zach, and McDonnell, Dave
Submitter:: Charles Woodman
Date Uploaded:: 03/06/2016
Date Modified:: 05/07/2019
Date Created:: 2014
License:: All rights reserved

viDEO saVAnt at SF Cinematheque

Type:: Media
Description/Abstract:: Live audio visual improvisation on 05/3/2015 at SF Cinematheque, Center 4 New Music, San Francisco
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 03/18/2016
Date Modified:: 05/07/2019
Date Created:: 2015
License:: All rights reserved

Defining the IASB’s governance network: a social network analysis

Type:: Article
Description/Abstract:: The purpose of this study was to define and examine the IASB’s governance network. The IASB’s governance network was bound to include 14 organisational members and 407 individual actors. I used social network methodology to examine the professional and geographic perspectives represented as well as the extent to which the governance network was structurally embedded. It was found that the network forms a definable hierarchy that exhibits qualities of structural embeddedness. Banking interests were more embedded within the governance network than any other professional, academic, or social group. Also, a strong Western influence was detected. The societal benefit of this effort was to engage society in general and accounting researchers in particular in hopes of encouraging discourse about regulatory processes with both macro and micro consequences.
Creator/Author:: Goedl, Patricia
Submitter:: Patricia Goedl
Date Uploaded:: 06/01/2017
Date Modified:: 06/01/2017
Date Created:: 2012
License:: All rights reserved

Quique (Pais, Country)

Type:: Media
Description/Abstract:: Collaboration with Poet/Performer Enrique Aviles. This video has its origins as a part of the “video set” for a performance by Aviles, directed by Davis Chung. In the theatrical piece Aviles played the roles of two immigrants to the US (one Mexican and one Korean) who live on opposite sides of a rooming house in the Adams Morgan neighborhood in DC. Subsequently, Aviles and I decided to create a stand alone video using one of his poems. The original footage of the neighborhood was supplemented with images of graffiti he produced and a shot of him reciting the poem in the backyard of his house in Arlington, VA.
Creator/Author:: Aviles, Enrique (poetry); Airirang Korean Music and Dance Ensemble (music), and Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 03/23/2016
Date Modified:: 05/07/2019
Date Created:: 1996
License:: All rights reserved

American Diorama Installed at El Camino Medical Center

Type:: Media
Description/Abstract:: My first multi channel work for synchronized video streams. The piece starts in Cape Cod and moves gradually across the North American continent, ending at the Pacific Ocean. There is no attempt to cover all this of ground in any compete way - the work is an assembly of the places I traveled to and landscapes I admired during the four-year period in which I collected the material. All the scenes were shot with a single camera, then staggered in editing to create the appearance of a continuous shot. During filming I would pan, pause, and then move again, resulting in a series of staggered movements in which the different screens appear to drift in and out of synchronization. Installed at El Camino Medical Center in Mountain View, California.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 04/05/2016
Date Modified:: 05/07/2019
Date Created:: 2007
License:: All rights reserved

Drift

Type:: Media
Description/Abstract:: A mostly formal exercise in composition and image processing, using footage of water. Probably the first in a ongoing series of works dealing with landscape, investigating the idea of video as a contemplative viewing experience akin to painting. Filmed in California and Mexico, Developed over the course of two visits to ETC, Final editing at PPG onto 1” open reel tape.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 04/05/2016
Date Modified:: 05/12/2019
Date Created:: 1992
License:: All rights reserved

Donald Shell Interview

Type:: Media
Description/Abstract:: Donald Shell is most famous for a creating a sort routine named after him. Computer science majors most likely are familiar with this code, but not the person.
Creator/Author:: McMahon, Russ
Submitter:: Russ McMahon
Date Uploaded:: 05/20/2016
Date Modified:: 05/20/2016
License:: All rights reserved

Meteorological Data Jumpingpound Ridge

Type:: Dataset
Description/Abstract:: Meteorological data from an Onset tower including shielded air temperature, photosynthetically active radiation (PAR), relative humidity, wind speed and direction, and rainfall collected every 15 min. The location is 50.9583N, -114.8809W, alt 2083m The station is still operational and files will be updated after manual yearly downloads.
Creator/Author:: Matter, Steve
Submitter:: Stephen F. Matter
Date Uploaded:: 10/07/2015
Date Modified:: 08/20/2025
Date Created:: 2010-10
License:: Attribution-NonCommercial 4.0 International

Mood regulation experiment data

Type:: Dataset
Description/Abstract:: The data contained herein address the following questions. The following is, in part, the statement of purpose from the IRB protocol approved for the following study. The decision to act as illustrated by the statement "I don't feel like doing this right now" may be one of the most frequent and basic kinds of decisions made. Consciously accessible feels or moods may play an integral role in the maintenance of physical well-being by leading to instrumental action which reduces extremes in physiological response. The purpose of this study is to demonstrate the relation between mood regulation traits and actual self report mood during an experimental task wherein the participant is repeatedly asked to choose the difficulty of a math task, followed by administration of a mood scale. The method is more fully described in Hovanitz, C. A., Hursh, A. H., & Hudepohl, A. D. (2011). Dimensions of affect modulated by perceived mood regulation ability. Applied Psychophysiology and Biofeedback. 36:113-119. Additional questionnaire, not yet analyzed and published, are present in this data set.
Creator/Author:: Hovanitz, Christine
Submitter:: Christine Hovanitz
Date Uploaded:: 10/08/2014
Date Modified:: 12/13/2016
Date Created:: 2014-10-08
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Exquisite Corpse

Type:: Media
Description/Abstract:: Contribution to the "Exquisite Video Corpse" project. The first 8 seconds are the video I was given as a departure point, the remainder is my contribution to the chain. The final 10 seconds were given to the next contributor.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 08/06/2016
Date Modified:: 05/09/2019
Date Created:: 2011
License:: All rights reserved

sofferte onde serene

Type:: Media
Description/Abstract:: Music Luigi Nono ...sofferte onde serene... 1976, for piano and tape. Produced for Collide-o-Scope Music on the occasion of our performance at Atlas Performing Arts Center, Washington, DC in 2011.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 08/06/2016
Date Modified:: 05/08/2019
Date Created:: 2011
License:: All rights reserved

Xenakis, Mists

Type:: Media
Description/Abstract:: Inspired by Mists, Iannis Xenakis, 1981, Live audio visual improvisation on 03/11/11 at Atlas Intersections Festival, Washington DC.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 08/06/2016
Date Modified:: 05/08/2019
Date Created:: 2011
License:: All rights reserved

Echoes of Amber

Type:: Media
Description/Abstract:: The image is of the Carew Tower in Cincinnati, and the video was shot on a Mattel Videster toy camera.
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 08/06/2016
Date Modified:: 05/08/2019
Date Created:: 2011
License:: All rights reserved

viDEO sAVant @ International House Philadelphia

Type:: Media
Description/Abstract:: Live audio visual improvisation on 01/28/2012 at International House Philadelphia
Creator/Author:: Woodman, Charles
Submitter:: Charles Woodman
Date Uploaded:: 08/06/2016
Date Modified:: 05/08/2019
Date Created:: 2012
License:: All rights reserved

First lessons in English grammar

Type:: Document
Description/Abstract:: A grammar handbook that uses diagrams and inquiry. 6 pages.
Creator/Author:: Clark, S. W. (Stephen Watkins), 1810-1901
Submitter:: Nathan Tallman
Date Uploaded:: 09/14/2016
Date Modified:: 02/06/2017
Date Created:: 1860
License:: Public Domain Mark 1.0

Correspondence between Martin Buber, Hans Kohn, Abraham Joshua Heschel and Adolph Oko, 1939-44

Type:: Article
Description/Abstract:: Martin Buber is one of the luminaries of modern Jewish thought, and yet prior to 1944 his work was little known in the Anglophone world as few of his books had been translated into English. In 1933, Buber asked Adolph Oko, the Librarian of the Hebrew Union College (H.U.C.) in Cincinnati, Ohio to help him find a publishers for his work. The correspondence about securing a publisher between Buber and Oko eventually expanded to include the theologian Abraham Joshua Heschel (then teaching at H.U.C.) and the historian Hans Kohn, a former student of Buber who was now a refugee teaching in the U.S.
Creator/Author:: Krome, Frederic
Submitter:: Frederic Krome
Date Uploaded:: 10/17/2016
Date Modified:: 05/23/2019
Date Created:: 2002
License:: All rights reserved

Between the Diaspora and Zion: Cecil Roth and his American friends

Type:: Article
Description/Abstract:: Throughout much of his career the Anglo-Jewish historian Cecil Roth visited the U.S. and lectured to American Jewish students. Indeed, his first academic appointment was as a visiting professor at the Jewish Institute in Religion in New York City, and he was a regular teacher at the summer institutes of the Intercollegiate Menorah Society. Yet, he only wrote one short article (in 1963) that focused exclusively on American Jewish history, which was commissioned by Jacob Rader Marcus, the “Dean of American Jewish Historians.” An examination of Roth’s correspondence over a thirty plus year period reveals that his discussions of the nature and purpose of Jewish history was largely shaped by his relationship with American Jewry.
Creator/Author:: Krome, Frederic
Submitter:: Frederic Krome
Date Uploaded:: 10/17/2016
Date Modified:: 05/23/2019
Date Created:: 2006
License:: All rights reserved

Tunisian Victory and Anglo-American Film Propaganda in World War II

Type:: Article
Description/Abstract:: After the liberation of North Africa, in 1943, it was discovered by policy makers within the Grand Alliance that both the British and Americans were in the process of making documentary films about the Operation Torch campaign. Fearful that separate films would highlight potential dissension with the Anglo-American alliance, the director Frank Capra was dispatched to London to coordinate his U.S. Army documentary with his British counter-parts. Instead of a smooth process, the joint film project bogged down in inter-service and inter-allied rivalry’s that delayed the completion of Tunisian Victory for over a year.
Creator/Author:: Krome, Frederic
Submitter:: Frederic Krome
Date Uploaded:: 10/18/2016
Date Modified:: 05/23/2019
Date Created:: 1996
License:: All rights reserved

Creating "Jewish History for Our Own Needs:" The Evolution of Cecil Roth's Historical Vision,1925-1935

Type:: Article
Description/Abstract:: Remembered today as one of the great popularizers of Jewish history, in the inter-war year the Anglo-Jewish historian Cecil Roth was unable to secure an academic appointment until 1939. As such he turned to writing popular history as a means of support, and while some academic historians discounted his work (then and now), an examination of Roth’s correspondence with individuals such Henry Hurwitz of the Intercollegiate Menorah Society, reveal that Roth worked assiduously to develop an approach to history that would be both academically sound and “useful” to those readers who wanted to understand the contours of Jewish life.
Creator/Author:: Krome, Frederic
Submitter:: Frederic Krome
Date Uploaded:: 10/18/2016
Date Modified:: 05/23/2019
Date Created:: 2001
License:: All rights reserved

The True Glory and the Failure of Anglo-American Film Propaganda in the Second World War

Type:: Article
Description/Abstract:: In an effort to promote an image of Allied unity on the eve of Operation Overlord, the Allied invasion of Western Europe, a Joint Anglo-American Film Commission was established with the goal of making a series of short documentaries on the liberation of the continent. Unfortunately, despite the prior planning, the plans for a series of joint films fell victim to competing ideologies about how to showcase the allied campaign. In an effort to salvage the situation the American film maker George Stevens was brought in to make a single long documentary, highlighting the campaign from D-Day to VE-Day. The resulting film, The True Glory, won an Oscar for best documentary of 1945, but in fact was the result of a failure of Allied film propaganda policy.
Creator/Author:: Krome, Frederic
Submitter:: Frederic Krome
Date Uploaded:: 10/19/2016
Date Modified:: 05/23/2019
Date Created:: 1998
License:: All rights reserved

Handling Knowledge in Indian IT Organizations

Type:: Document
Description/Abstract:: With the several changes happening every day in societies and in thoughts say knowledge challenges are increasing day by day which is to be faced by business as well as other organizations. To tackle these challenges many tactics are implemented and are in process to further improve. Handling of these challenges requires a system under which one can work and let adaptation to the changes can be done smoothly. Today majority of business organizations have a knowledge management program in one or another form. Indian business organizations are also feeling the need for new business paradigms. Knowledge management is a systematic process for creating, acquiring, synthesizing, learning, sharing and using knowledge and experience to achieve organizational goals. This paper “Handling Knowledge in Indian Information Technology (IT) Organizations” underscores Knowledge Management practices in business organizations at main cities in India. Papers site an overview of the techniques and also include future improvements that can be done to ameliorate the efficiency of Knowledge Management System.
Creator/Author:: Ajmera, Himanshu; Agarwal, Ratish, and Pawar, Mahesh
Submitter:: Himanshu Ajmera
Date Uploaded:: 09/03/2017
Date Modified:: 05/23/2019
Date Created:: 2016-12-02
License:: All rights reserved

Connecting with American Faculty and Chinese Students Overseas: Repositioning the Library’s Role in the Digital Age

Type:: Image
Description/Abstract:: As an increasing number of universities expand programs globally, libraries are seen as an essential partner for this endeavor. Some library units are fully or semi-fully integrated into these academic programs. The University of Cincinnati (Ohio, USA) and Chongqing University (Chongqing, China) introduced the first co-operative engineering education program in China in 2013. Since this time, the University of Cincinnati library has been striving to connect American faculty and Chinese students in three main areas: 1.utilizing library websites and social media for reference, instruction, and outreach; 2.playing a peer role for traveling faculty with course materials, elearning, and basic technical support; 3.developing a sustainable relationship with matching librarians in Chongqing for collection development and beyond. This presentation is intended to share experience and practices with librarians in similar positions, as well as administrators looking to develop a similar position.
Creator/Author:: Cheng, Hong
Submitter:: Hong Cheng
Date Uploaded:: 11/15/2016
Date Modified:: 06/26/2019
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Sound & Music Part 1 of 5 The Physics and Physiology of Sound iBook Version

Type:: Document
Description/Abstract:: This is the iBook version of chapter one of five. It requires the iBooks app to read. The media is embedded so no internet connection is necessary after the book has been downloaded. It contains many interactive widgets and videos that are not found in the epub, pdf, and mobi versions. However, the file size for this format is much larger and requires the book to be broken into individual chapters. All the text can be read by clicking the Closed Caption (CC) button on each video. There are keywords on the right side of each page to enable word searches.
Creator/Author:: Petach, Jay
Submitter:: Jay Petach
Date Uploaded:: 12/06/2016
Date Modified:: 12/06/2016
Date Created:: 2016-12-05
License:: All rights reserved

Sound & Music Part 2 of 5 The History of Sound Recording iBook Version

Type:: Document
Description/Abstract:: This is the iBook version of chapter two of five. It requires the iBooks app to read. The media is embedded so no internet connection is necessary after the book has been downloaded. It contains many interactive widgets and videos that are not found in the epub, pdf, and mobi versions. However, the file size for this format is much larger and requires the book to be broken into individual chapters. All the text can be read by clicking the Closed Caption (CC) button on each video. There are keywords on the right side of each page to enable word searches.
Creator/Author:: Petach, Jay
Submitter:: Jay Petach
Date Uploaded:: 12/06/2016
Date Modified:: 05/23/2019
Date Created:: 2016-12-05
License:: All rights reserved

Sound & Music Part 3 of 5 Microphones, Consoles, Speakers, Analog Recording iBook Version

Type:: Document
Description/Abstract:: This is the iBook version of chapter three of five. It requires the iBooks app to read. The media is embedded so no internet connection is necessary after the book has been downloaded. It contains many interactive widgets and videos that are not found in the epub, pdf, and mobi versions. However, the file size for this format is much larger and requires the book to be broken into individual chapters. All the text can be read by clicking the Closed Caption (CC) button on each video. There are keywords on the right side of each page to enable word searches.
Creator/Author:: Petach, Jay
Submitter:: Jay Petach
Date Uploaded:: 12/06/2016
Date Modified:: 12/06/2016
Date Created:: 2016-12-05
License:: All rights reserved

Bayesian Approach to Selecting Hyperelastic Constitutive Models of Soft Tissue

Type:: Article
Description/Abstract:: Hyperelastic constitutive models of soft tissue mechanical behavior are extensively used in applications like computer-aided surgery, injury modeling, etc. While numerous constitutive models have been proposed in the literature, an objective method is needed to select a parsimonious model that represents the experimental data well and has good predictive capability. This is an important problem given the large variability in the data inherent to soft tissue mechanical testing. In this work, we discuss a Bayesian approach to this problem based on Bayes factors. We propose a holistic framework for model selection, wherein we consider four different factors to reliably choose a parsimonious model from the candidate set of models. These are the qualitative fit of the model to the experimental data, evidence values, maximum likelihood values, and the landscape of the likelihood function. We consider three hyperelastic constitutive models that are widely used in soft tissue mechanics: Mooney-Rivlin, Ogden and exponential. Three sets of mechanical testing data from the literature for agarose hydrogel, bovine liver tissue, porcine brain tissue are used to calculate the model selection statistics. A nested sampling approach is used to evaluate the evidence integrals. In our results, we highlight the robustness of the proposed Bayesian approach to model selection compared to the likelihood ratio, and discuss the use of the four factors to draw a complete picture of the model selection problem.
Creator/Author:: Madireddy, Sandeep; Vemaganti, Kumar, and Sista, Bhargava
Submitter:: Kumar Vemaganti
Date Uploaded:: 01/21/2015
Date Modified:: 05/23/2019
Date Created:: 2015-01-21
License:: All rights reserved

Empirical examination of neighborhood context of individual travel behaviors

Type:: Article
Description/Abstract:: This paper uses multilevel modeling of Hamilton County individual travel activity data.
Creator/Author:: Wang, Shujie and Kim, Changjoo
Submitter:: Changjoo Kim
Date Uploaded:: 02/02/2015
Date Modified:: 05/23/2019
Date Created:: 2015-02-02
License:: Attribution-NoDerivs 4.0 International

Commuting Data for Hamilton County, 2010

Type:: Dataset
Description/Abstract:: This data includes socio-economic-geographic attributes in Hamilton County by Census tracts of year 2010.
Creator/Author:: Kim, Changjoo
Submitter:: Changjoo Kim
Date Uploaded:: 02/02/2015
Date Modified:: 05/23/2019
Date Created:: 2015-02-02
License:: CC0 1.0 Universal

Sound & Music Part 4 of 5 Digital Recording, Signal Processing, Movie, Television, and Live Sound iBook Version

Type:: Document
Description/Abstract:: This is the iBook version of chapter four of five. It requires the iBooks app to read. The media is embedded so no internet connection is necessary after the book has been downloaded. It contains many interactive widgets and videos that are not found in the epub, pdf, and mobi versions. However, the file size for this format is much larger and requires the book to be broken into individual chapters. All the text can be read by clicking the Closed Caption (CC) button on each video. There are keywords on the right side of each page to enable word searches.
Creator/Author:: Petach, Jay
Submitter:: Jay Petach
Date Uploaded:: 12/06/2016
Date Modified:: 12/06/2016
Date Created:: 2016-12-05
License:: All rights reserved

Legal Research Using Books

Type:: Media
Description/Abstract:: A video series that walks the viewer through the process of conducting legal research using paper resources. Video 1 -- Legal Research: Intro Video 2 -- Legal Research: Define Problem Video 3 -- Legal Research: Find a Starting Point Video 4 -- Legal Research: Read Starting Point Video 5 -- Legal Research: Additional Material Video 6 -- Legal Research: Validation Video 7 -- Legal Research: Summary
Creator/Author:: Davis, Bruce, Wm.
Submitter:: Wm. Bruce Davis
Date Uploaded:: 12/07/2016
Date Modified:: 12/08/2016
License:: Attribution-NonCommercial-ShareAlike 4.0 International

Creating metadata out of thin air and managing large batch imports

Type:: Generic Work
Description/Abstract:: A presentation and paper delivered at Open Repositories 2012, the 7th International Conference on Open Repositories, held in Edinburgh, Scotland, July 9-13, 2012.
Creator/Author:: Newman, Linda
Submitter:: Linda Newman
Date Uploaded:: 12/08/2016
Date Modified:: 12/08/2016
Date Created:: 2012-07-12
License:: Attribution-NonCommercial-NoDerivs 4.0 International

The Evolving Role of the Library in Research

Type:: Document
Description/Abstract:: Acquiring, organizing, making accessible, and preserving information and data, including faculty archives, university records, theses/dissertations, and other output created by the university, is the library’s reason-for-being. Paper Submitted to ARN Envisioning the Future as Critical Partners in Data-Driven Science Workshop
Creator/Author:: Marine, Stephen
Submitter:: Stephen Marine
Date Uploaded:: 12/08/2016
Date Modified:: 12/08/2016
Date Created:: 2013-04-18
License:: Attribution-NoDerivs 4.0 International

Across Nations: Students Leading Cross-Cultural Understanding

Type:: Generic Work
Description/Abstract:: Panel presentation at the 2014 UC's Diversity Conference:Join a panel of students and librarians who will showcase their collaborative events focused on exploring cultures through personal experiences and library resources. The most recent event, Across Nations: Diversity Speaks, was a big success thanks to student engagement at all stages of planning and presentation. International and study abroad students planned, publicized and moderated the event. Student contributions ranged from social media publicity to the icebreaker – a culture shock video - to preparing ethnic foods and wearing traditional clothing. Most importantly, the inclusive and open dialog at the event allowed students to share their perceptions of other countries, including misconceptions that were corrected by students from those countries. The event serves as a model for utilizing student expertise and enthusiasm for enhancing cross cultural understanding and global engagement.
Creator/Author:: Singh, Ankita; Al-Riyami, Rahma; Hart, Olga, and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2014-04-02
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Back to the Chalkboard: Students at the Intersection of Knowledge, Information, Technology, and Media

Type:: Generic Work
Description/Abstract:: Imagine engaging 4,000 incoming students for library orientation over the course of 19 days, 200 + students per day for one hour. Imagine using problem-based learning scenarios to convey the libraries’ role with research in 8 minutes or less. Imagine double-sided, free standing 4’ by 8’ chalkboards as the innovative tool to inspire students. Discover how to develop and implement an active learning experience that is easy to facilitate.
Creator/Author:: Macke, Barbara and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2013-03-23
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Chalk It Up: Common Reading & Library Research

Type:: Generic Work
Description/Abstract:: Presentation for CET&L faculty workshop, illustrating methods for using the Common Reading book, Justice, in assignments and courses.
Creator/Author:: Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2013-08-15
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Flipping the Classroom

Type:: Generic Work
Description/Abstract:: CET&L Faculty Workshop, Panel Presentation
Creator/Author:: Bach, Pamela and Ghosh, Cheryl
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2014-12-09
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Focused Surveys: Building Blocks of Sustainable Assessment

Type:: Generic Work
Description/Abstract:: In its recent strategic planning effort, the University of Cincinnati Libraries (UCL) identified assessment as one of five strategic directions. The overall goal is to “ensure library user input into decision making about collections, services, and facilities.” While UCL has participated in LibQUAL+ regularly since 2002, and conducted other studies, UCL’s Transforming the UC Library User Experience, Strategic Plan 2011-2014, places increased focus and importance on gathering information and data from and about our users to inform decisions. The presenters will share their experience developing an assessment plan for UCL and initial efforts in building a culture of assessment. The design, methodology and approach of two focused surveys, that are a part of our coordinated plan of assessment, will be shared.
Creator/Author:: Albrecht, Cheryl; Burgess, Kristen; Schick, Leslie, and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2012-10-29
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Fun, Food, and Library Finds: Reimagining Our Library and Ourselves with Student Engagement

Type:: Generic Work
Description/Abstract:: 1st Fridays @ 4, a series of informal themed events hosted by librarians, was designed to engage with students in meaningful conversation and explore the terrain of information resources beyond coursework and research needs. The series marketed with the tag line, fun, food and library finds, included themes of Survivor, Library Edition, Celebrate the Chinese New Year, and The Secret World of Rare Books. The series was highly successful, providing direction for the current year.
Creator/Author:: Hart, Olga and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2013-10-15
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Leveraging Library Resources To add Value to your Teaching

Type:: Generic Work
Description/Abstract:: Presentation for 3 T Conference at the University of Cincinnati. Learning outcomes: make effective use of library resources in teaching; use technology to “embed” librarians in courses; understand how faculty can collaborate with librarians in teaching; use an easy, practical technique to visualize students’ perceptions about a class topic.
Creator/Author:: Albrecht, Cheryl; Choudhury, Lori; Schick, Leslie, and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2014-03-07
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Reduce, Reuse, Recycle: Flipping the Classroom

Type:: Generic Work
Description/Abstract:: Virtual Poster for Association of College and Research Libraries 2015 Conference. This poster illustrates how to reuse and recycle existing course materials by flipping the classroom into library instruction sessions. This activity merges problem-based classroom active learning techniques with student self-paced pre-work that will increase student engagement, content retention, and collaboration with the teaching faculty.
Creator/Author:: Hart, Olga; Bach, Pamela, and Tenofsky, Deborah
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2015-03-20
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Research in 3 Words

Type:: Generic Work
Description/Abstract:: Presentation for the Academy of Fellows for Teaching and Learning, University of Cincinnati
Creator/Author:: Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2015-01-28
License:: Attribution-NonCommercial-NoDerivs 4.0 International

The Rite of Passage: From Information Grazers to Evidence Based Researchers

Type:: Generic Work
Description/Abstract:: Using the university-wide common reading book, Justice: What’s the Right Thing to Do?, we jump start the research process with first year students from the moment they step onto campus with an 8 minute orientation activity. In a small group, highly interactive process, students explore current controversial scenarios and are challenged to make informed and reasonable judgments based on evidence and observation. The goal: capture their natural curiosity and get them excited about research, information, discovery, and evaluation.
Creator/Author:: Macke, Barbara and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2013-11-14
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Undergraduate Research and UC Libraries

Type:: Generic Work
Description/Abstract:: A presentation for UC Libraries showcasing 2 projects: English Composition 1001 students' perception of research and findings of an undergraduate research survey identifying library needs, a collaboration with UC’s Office of Undergraduate Research, Scholarly Endeavors and Creative Practice.
Creator/Author:: Stafford, Sarah and Bach, Pamela
Submitter:: Pamela Bach
Date Uploaded:: 12/12/2016
Date Modified:: 05/31/2018
Date Created:: 2014-06-16
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Positioning for the Data Future: New Directions for the University of Cincinnati Libraries

Type:: Generic Work
Description/Abstract:: Poster presented at the Data Information Literacy Symposium, September 22-24 at Purdue University (West Lafayette, IN)
Creator/Author:: Baldwin, Ted and Burgess, Kristen
Submitter:: Ted Baldwin
Date Uploaded:: 12/12/2016
Date Modified:: 12/14/2016
Date Created:: 2013-09-22
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Assessment of Medical Students' Use of eBooks

Type:: Generic Work
Description/Abstract:: The University of Cincinnati Health Sciences Library (HSL) surveyed all first-year medical students about electronic books (eBooks) purchased for the first-year curriculum and conducted a usage analysis. The HSL wanted to determine the extent to which students use eBook versions if required for the curriculum or if they continue to use print versions, and to analyze eBook usability, ease of use, and overall student satisfaction.
Creator/Author:: Burgess, Kristen and Schick, Leslie
Submitter:: Kristen Burgess
Date Uploaded:: 12/12/2016
Date Modified:: 12/12/2016
Date Created:: 2013-04-04
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Name Authority Control and Researcher Identity Management

Type:: Generic Work
Description/Abstract:: Join Kristen Burgess, Sean Crowe, and Carolyn Hansen for a discussion of new trends in name authority control and researcher identity management. Our session will cover the evolution of name authority control programs such as LoC NACO, efforts to merge and disambiguate disparate national name authorities (ISNI), as well as the nascent ORCID program to track and manage researchers. After a short presentation, we hope to have an open discussion of these topics and what they mean for UC Libraries.
Creator/Author:: Hansen, Carolyn; Crowe, Sean, and Burgess, Kristen
Submitter:: Kristen Burgess
Date Uploaded:: 12/12/2016
Date Modified:: 12/12/2016
Date Created:: 2013-12-10
License:: Attribution-NonCommercial-NoDerivs 4.0 International

From Cataloging to Metadata : Differences in Scope, Skills, and Standards

Type:: Generic Work
Description/Abstract:: Carolyn Hansen, Metadata Librarian, and her colleague Sean Crowe, Electronic Resources Librarian at University of Cincinnati Libraries, will describe their experiences of transitioning from cataloging to metadata, which is a common occurrence for catalogers these days. As materials and projects are brought online as well as born digital, traditional cataloging sometimes does not suffice the needs of these types of collections. Their presentation is titled "From Cataloging to Metadata: Difference in Scope, Skills, and Standards" and will focus on UC's conversion of over 9,000 Dublin Core records to the VRA standard, illustrating the differences between traditional cataloging and metadata projects with technical details at the forefront. Presentation at ALA Midwinter Conference, CaMMS Cataloging Norms Interest Group, Jan. 25, 2014
Creator/Author:: Hansen, Carolyn and Crowe, Sean
Submitter:: Sean Crowe
Date Uploaded:: 12/12/2016
Date Modified:: 12/12/2016
Date Created:: 2014-01-25
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Ultrastructural Heterogeneity in Melanocytes Cultured from Patients with Chediak-Higashi Syndrome

Type:: Generic Work
Description/Abstract:: Koshoffer, Amy
Creator/Author:: Koshoffer, Amy; Westbroek, Wendy; Gahl, William A.; Boissy, Raymond E., and Huizing, Marjan
Submitter:: Amy Koshoffer
Date Uploaded:: 12/12/2016
Date Modified:: 02/06/2017
Date Created:: 2006-08-31
License:: All rights reserved

Provenance and tectonic setting of the Jacobsville sandstone, from Ironwood to Keweenaw Bay, Michigan

Type:: Etd
Description/Abstract:: The Middle Proterozoic Jacobsville Sandstone, located on the upper peninsula, Michigan, is the youngest rift- related sedimentary unit in the 1.1 Ga Midcontinent rift. Although outcrops of the Jacobsville Sandstone along the Lake Superior shoreline and in river gorges are well studied, these outcrops represent stratigraphically only the upper 300-400 feet of the estimated 9,000 feet thick Jacobsville Sandstone. I used drill cores and newly-studied outcrop samples; 1) to characterize stratigraphically continuous sections; 2) to compare the Jacobsville Sandstone in subsurface with the Jacobsville Sandstone in outcrop; 3) to identify lateral and vertical variations in texture and petrographic composition within the Jacobsville Sandstone; and 4) to determine petrographic provenance of the Jacobsville Sandstone.
Creator/Author:: Hedgman, Cheryl
Submitter:: Graduate School
Date Uploaded:: 12/12/2016
Date Modified:: 12/12/2016
Date Created:: 1992
License:: Attribution-NonCommercial-NoDerivs 4.0 International

A Drying Model of a Vibro-Separator

Type:: Etd
Description/Abstract:: Vibro-separators are widely used to separate solid particles from slurries and/or to size segregate the dried product. In this thesis, a mathematical model was developed to theoretically evaluate the vacuum drying of the collected solid on the screen of a vibro-separator.
Creator/Author:: Yang, Yuelei
Submitter:: Graduate School
Date Uploaded:: 12/12/2016
Date Modified:: 05/23/2019
Date Created:: 1999
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Architectural and Interior Design Senior Theses Index, 1984-1994. Subject Index

Type:: Generic Work
Description/Abstract:: Subject index to Architectural and Interior Design Senior Theses, 1984-1994, submitted to the School of Architecture, College of Design, Architecture, and Art. Index terms include Commercial, Government and Public, Health Facilities, Industrial, Recreation and Entertainment, Residential, and Transportation.
Creator/Author:: Unknown
Submitter:: Elizabeth A. Meyer
Date Uploaded:: 12/12/2016
Date Modified:: 12/12/2016
Date Created:: 1994
License:: All rights reserved

Architectural Senior Theses Index, 1979-1983. Volume 2, Subject Index

Type:: Generic Work
Description/Abstract:: Subject index to Architectural Senior Theses, 1979-1983, submitted to the School of Architecture, College of Design, Architecture and Art. Index terms include: Commercial, Community Planning, Cultural, Educational, Environment, Government/Public, Health, Recreation, Religious, Residential, Theory, and Transportation.
Creator/Author:: Banister, Kim
Submitter:: Elizabeth A. Meyer
Date Uploaded:: 12/12/2016
Date Modified:: 12/12/2016
Date Created:: 1984
License:: All rights reserved

Creative Re-Use of geographic and historical data and documents

Type:: Generic Work
Description/Abstract:: A presentation at Open Repositories 2013, held July 8-12 at Charlottetown, Prince Edward Island, Canada.
Creator/Author:: Newman, Linda
Submitter:: Linda Newman
Date Uploaded:: 12/15/2016
Date Modified:: 12/15/2016
Date Created:: 2013-07-09
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Deconstructing and Reconstructing a Repository – Strategies for Nimble Rebuilding

Type:: Generic Work
Description/Abstract:: A presentation at Open Repositories 2013, held July 8-12 at Charlottetown, Prince Edward Island, Canada.
Creator/Author:: Newman, Linda
Submitter:: Linda Newman
Date Uploaded:: 12/15/2016
Date Modified:: 12/18/2017
Date Created:: 2013-07-02
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Hamilton County Stable Integrated Communities: 2010 Update

Type:: Article
Description/Abstract:: The previous study for which this one serves as an update concluded that there was good news for those who wished to live in racially integrated communities in Hamilton County. The news remains good. At the 2010 census, fifty-four suburban Hamilton County communities and Cincinnati neighborhoods, over one-third of the total, containing 45% of the total population of the county, were at least modestly racially integrated (Table 9).2 This continues trends that began as early as 1970 when seven communities achieved integration that persisted for at least forty years. At the 1980 census, twelve achieved racial integration that lasted for at least thirty years. And at the 1990 census, ten became integrated with that persisting for at least the next twenty years. Together, twenty-nine communities have remained racially integrated for at least twenty years. At the same time, the dissimilarity index (DI), a standard measure of residential integration, showed improved black/white integration for both the city of Cincinnati and Hamilton County as a whole (Table 1). Cincinnati’s DI dropped from 91.2 in 1950, its highest point, to 64.8 in 2010. Hamilton County’s DI dropped from 82.8 in 1980, the earliest for which we have data, to 71.3 in 2010. This means that increasing numbers of whites and blacks are living on the same blocks in a number of communities here. The desirability of these integrated neighborhoods has apparently remained steady over time. Although both the city and the county have lost population, the integrated neighborhoods have proportionally lost no greater population than the rest. Moreover, in the last decade, conventional wisdom to the contrary, several of the long-term integrated communities experienced increases in the white percentage of their population. When we looked at socio-economic conditions throughout the county as measured by seven indicators drawn from the census, we found a range of values for the integrated communities. Some are clearly in quite good shape and improving and some show signs of decay. On a scale that aggregates five of these indicators, integrated communities on the average fell between the values for the city of Cincinnati as a whole and for suburban Hamilton County. This is particularly good news as the declining economy has certainly hurt the African Americans population more than the rest of the population. Because of this, the integrated communities might be expected to show a greater decline than the rest of the county, and while some of them have been hurt, on the average, they seem to be holding their own in comparison to the rest of the county. Finally, the city of Cincinnati, which has long seen an increase in black population and a decrease in white population, in the 2000s saw a significant slow-down in the decline of white population and an actual decrease in black population. This suggests that the black/white ratio may stabilize in the city in the near future.
Creator/Author:: Casey-Leininger, Charles
Submitter:: Charles Casey-Leininger
Date Uploaded:: 10/07/2014
Date Modified:: 08/10/2016
Date Created:: 2011-10
License:: All rights reserved

The Durrës Regional Archaeological Project: Archaeological Survey in the Territory of Epidamnus/Dyrrachium in Albania

Type:: Article
Description/Abstract:: In the spring of 2001 the hilly uplands immediately northwest of the modern city of Durres were for the first time investigated using the techniques of intensive surface survey. In total, an area of six square kilometers was explored and twenty-nine sites were defined, most of them new. Remains of Greek antiquity were plentiful and include unpublished inscriptions and graves. One site may be the location of a previously unknown Archaic temple. Included in this article are descriptions of the areas investigated, a list of sites, and a catalogue of the most diagnostic artifacts recovered. Patterns of settlement and land use are discussed and compared to those recorded by other surveys in Albania.
Creator/Author:: Acheson, Phoebe E.; Pojani, Iris; Hoti, Afrim; Stocker, Sharon R.; Davis, Jack L.; Hayes, John W., and Wolpert, Aaron
Submitter:: John Wallrodt
Date Uploaded:: 10/08/2014
Date Modified:: 02/06/2017
Date Created:: 2014-10-08
License:: All rights reserved

Wood, Plywood and Veneer, Cranbrook, the New Bauhaus and the W. P. A.: the Origins of the Eames Chair of 1946

Type:: Article
Description/Abstract:: Lloyd C. Engelbrecht (born 1927) is Professor Emeritus of Art History at the University of Cincinnati. His article, “Wood, Plywood and Veneer, Cranbrook, the New Bauhaus and the W. P. A.: the Origins of the Eames Chair of 1946,” had its origins in a paper presented at a symposium, “Bauhaus, New Bauhaus, W. P. A.: Chairs for Mid-Century,” October 17, 1981, at the Mid-America Conference of the College Art Association, meeting in Milwaukee. The article was expanded and eventually completed in 1987, but it was never published. The author asked that his late wife, June-Marie F. Engelbrecht (1930-2009), be given credit for her immense amount of help with the research and writing of the article.
Creator/Author:: Engelbrecht, Lloyd C.
Submitter:: Lloyd C. Engelbrecht
Date Uploaded:: 10/15/2014
Date Modified:: 07/27/2016
Date Created:: 2014-10-15
License:: All rights reserved

The Prairie School House a Study Guide Prepared by Lloyd C. Engelbrecht

Type:: Article
Description/Abstract:: Lloyd C. Engelbrecht (born 1927) is Professor Emeritus of Art History at the University of Cincinnati. This study guide was used to illustrate some of his classroom presentations and also on-site visits with his students to Prairie School buildings. This version of the study guide dates from May 10, 1994.
Creator/Author:: Engelbrecht, Lloyd C.
Submitter:: Lloyd C. Engelbrecht
Date Uploaded:: 10/15/2014
Date Modified:: 07/27/2016
Date Created:: 2014-10-15
License:: All rights reserved

Durres Master GIS Set

Type:: Dataset
Description/Abstract:: This compressed file contains the GIS files used for the DRAP project in shape file format. There is a Documentation folder with a ReadMe file that contains information about opening the documents as well as notes on their creation and conversion. There is a file included that will allow opening all of the files in ArcMap (v 10.1 tested) and QGIS (v 2.4 tested) but the data files themselves can be opened in whatever GIS software one chooses that can read ESRI shape file format.
Creator/Author:: Wallrodt, John
Submitter:: John Wallrodt
Date Uploaded:: 10/24/2014
Date Modified:: 09/17/2015
Date Created:: 2014-10-24
License:: Attribution 4.0 International

The Quest for Digital Preservation: will a portion of Math History be lost forever?

Type:: Generic Work
Description/Abstract:: Presentation given at MathFest, August 8, 2015, Washington, D.C. From the submission abstract: Libraries, archives, and museums have traditionally preserved and provided access to many different kinds of physical materials, including books, papers, theses, faculty research notes, correspondence, and more. These items have been critical for researchers to have a full understanding of their fields of study as well as the history and context that surround the work. However, in recent years many of these equivalent materials only exist electronically on websites, laptops, private servers, and social media. These digital materials are currently very difficult to track, preserve, and make accessible. Future researchers may very well find a black hole of content: discovering early physical materials and late electronic records, but little information for the late 20th though early 21st Centuries. In other words, a portion of history, including the field of Mathematics, may be lost unless this electronic content--perhaps some content you have right now--is cared for properly. The presenters will cover the issues surrounding Digital Preservation, including steps needed to make sure data is reasonably safe. Additionally they will pose a small number of discrete challenges and unsolved problems in the field of Digital Preservation, where Mathematicians may be able to help with analysis and new algorithms.
Creator/Author:: DiDomenico, Steve and Newman, Linda
Submitter:: Linda Newman
Date Uploaded:: 08/08/2015
Date Modified:: 06/13/2016
Date Created:: 2015-08-07
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Bonnie Cashin: Designing The Foundation of Modern Fashion

Type:: Article
Description/Abstract:: An overview of Bonnie Cashin's life and work which led to the concept of lifestyle design in fashion during the mid to late 20th century, forming the foundation of contemporary sportswear design.
Creator/Author:: Sarofeen, George
Submitter:: George Sarofeen
Date Uploaded:: 12/09/2014
Date Modified:: 05/23/2019
Date Created:: 2014-12-09
License:: All rights reserved

Developing a Library Content Services Portal

Type:: Article
Description/Abstract:: Description of a new web application to support collection development at University of Cincinnati Libraries.
Creator/Author:: Van Mil, James and Crowe, Sean
Submitter:: Sean Crowe
Date Uploaded:: 06/30/2015
Date Modified:: 07/27/2016
Date Created:: 2015-01
License:: All rights reserved

The landscape of archival employment: A study of professional archivist job advertisements, 2006-2014

Type:: Article
Description/Abstract:: The archival profession has long attempted to define what constitutes a professional archivist. These debates over education, training, and certification have lasted decades, however few studies have been completed on how the employment market for archivists has changed in response to these professional challenges. This study looks at almost a thousand professional archivist job advertisements between late 2006 and early 2014 to understand the current prevailing recruitment criteria. It is broader in scope and time period than other recent studies. Overall, the market was determined to be mostly stable during the study period.
Creator/Author:: Tansey, Eira
Submitter:: Eira Tansey
Date Uploaded:: 01/27/2016
Date Modified:: 01/27/2016
Date Created:: 2015-06-05
License:: All rights reserved

Leveraging Change to Transform our Teaching Practice

Type:: Media
Description/Abstract:: What initially looked like several change agents colliding to create a year of turbulence, came to be a year of transformation for our teaching practice. Both external forces, such as ACRL’s Framework for Information Literacy for Higher Education, and internal forces, such as new strategic directions in eLearning, provided momentum as we redesigned our research guides. The presentation includes a case study of a year-long process of re-envisioning our guides to enhance content based on the Framework’s threshold concepts, incorporate responsive and accessible design, and reflect our pedagogical practices. Throughout the process we collaborated with key campus stakeholders: eLearning strategists, English Composition faculty, and the student population. In addition, our process coincided with the renovation of one of our classrooms into a collaborative teaching and learning environment. The presentation demonstrates how the new space converged with our instruction strategies.
Creator/Author:: Hart, Olga and Bach, Pamela
Submitter:: Olga Hart
Date Uploaded:: 01/26/2017
Date Modified:: 01/26/2017
License:: Attribution-NonCommercial-NoDerivs 4.0 International

Challenges with Quality of Dataset Metadata in a Self-Submission Repository Model

Type:: Article
Description/Abstract:: This use case appears in Curating Research Data V2, an ACRL publication edited by Lisa R Johnston. Both volumes of the book are available as open access editions at the following link. http://www.ala.org/acrl/publications/booksanddigitalresources/booksmonographs/catalog/publications The use case examines the metadata contributed in a self-submission repository model and what changes were made in the metadata form to encourage researchers to contribute quality metadata.
Creator/Author:: Koshoffer, Amy; Hansen, Carolyn, and Newman, Linda
Submitter:: Amy Koshoffer
Date Uploaded:: 01/30/2017
Date Modified:: 02/21/2017
Date Created:: 2016-02-12
License:: Attribution-NonCommercial-NoDerivs 4.0 International

A Hierarchical Market Solution to the Min–Max Multiple Depots Vehicle Routing Problem

Type:: Article
Description/Abstract:: The problem of assigning a group of Unmanned Aerial Vehicles (UAVs) to perform spatially distributed tasks often requires that the tasks will be performed as quickly as possible. This problem can be defined as the Min–Max Multiple Depots Vehicle Routing Problem (MMMDVRP), which is a benchmark combinatorial optimization problem. In this problem, UAVs are assigned to service tasks so that each task is serviced once and the goal is to minimize the longest tour performed by any UAV in its motion from its initial location (depot) to the tasks and back to the depot. This problem arises in many time-critical applications, e.g. mobile targets assigned to UAVs in a military context, wildfire fighting, and disaster relief efforts in civilian applications. In this work, we formulate the problem using Mixed Integer Linear Programming (MILP) and Binary Programming and show the scalability limitation of these formulations. To improve scalability, we propose a hierarchical market-based solution (MBS). Simulation results demonstrate the ability of the MBS to solve large scale problems and obtain better costs compared with other known heuristic solution.
Creator/Author:: Sharma, Balaji R.; Cohen, Kelly; Ernest, Nicholas; Kumar, Manish, and Kivelevitch, Elad
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2014-01

A Formulation and Heuristic Approach to Task Allocation and Routing of UAVs under Limited Communication

Type:: Article
Description/Abstract:: Unmanned Air Vehicle (UAV) teams are anticipated to provide surveillance support through algorithms, software, and automation. It is desirable to have algorithms that compute effective and efficient routes for multiple UAVs across a variety of missions. These algorithms must be realizable, practical, and account for uncertainties. In surveillance missions, UAVs act as mobile wireless communication nodes in a larger, underlying network consisting of targets where information is to be collected and base stations where information is to be delivered. The role of UAVs in these networks has primarily been to maintain or improve connectivity while undervaluing routing efficiency. Moreover, many current routing strategies for UAVs ignore communication constraints even though neglecting communication can lead to suboptimal tour designs. Generating algorithms for autonomous vehicles that work effectively despite these communication restrictions is key for the future of UAV surveillance missions. A solution is offered here based on a variation of the traditional vehicle routing problem and a simple communication model. In this work, the new routing formulation is defined, analyzed, and a heuristic approach is motivated and described. Simulation results show that the heuristic algorithm gives near-optimal results in real-time, allowing it to be used for large problem sizes and extended to dynamic scenarios.
Creator/Author:: Cohen, Kelly; Sabo, Chelsea, and Kingston, Derek
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2014-01

Fuzzy logic control applications for second order problems with low damping

Type:: Article
Description/Abstract:: A general methodology has been developed for the design of a robust control law for a family of lightly damped second order problems. In this research effort, the passivity approach has been extended to systems having non-collocated input/output pairs by introducing an observer that incorporates the nominal dynamical model of the plant. The developed passive observer-based control law emulates numerous dynamic vibration absorbers which are tuned to a targeted frequency using classical methods and the tuning ratios are time-invariant. However, the uniqueness of this approach is that the damping parameters of the emulated absorbers are continuously varied by means of a fuzzy logic control algorithm to provide near minimum-time suppression of vibration. The developed approach is applied to both several benchmarks in the field of structural dynamics as well as experiments using piezo-ceramic sensors and actuators. Results show that this methodology provides stability and performance robustness on the one hand as well as requiring relatively low amount of actuation authority for desired nominal plant closeloop behavior.
Creator/Author:: Weller, Tanchum; Cohen, Kelly, and Ben-Asher, Joseph
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2001-11

Optimal Fireline Generation for Wildfire Fighting in Uncertain and Heterogeneous Environment

Type:: Article
Description/Abstract:: Fire is a natural component of many ecosystems but wildland fires often do pose serious threats to public safety, properties and natural resources. Forest fire acts as a dominant factor in reshaping of terrain and change of the ecosystem of a particular area. The total damage due to wildland fire shows an increasing trend over the past decade. Forest Fire Decision Support Systems (FFDSS) have been developed for the last thirty years all over the world that supplies valuable information on forest fire detection, fire behavior and other aspects of forest fires but lacks in developing intelligent fire suppression strategies. In this paper, an effort has been made to generate intelligent fire suppression strategies with efficient resource allocation using the Genetic Algorithm based optimization tool in a heterogeneous and uncertain scenario. The goal of this research is to perform intelligent resource allocation along with the generation of optimal firelines that minimizes the total burned area due to wildland fire. The solutions generated at each generations of the Genetic Algorithm (GA) are used to build the firelines in a heterogeneous terrain where advanced forest fire propagation model is used to evaluate the fitness values of each generated solutions. The optimal firelines thus obtained through the Simulation-Optimization technique minimizes the total damage due to wildland fire and eliminates the chance of any fire escape i.e., firefront reaching the fireline positions before they are built. Such techniques integrated with the existing FFDSS hold promise in effectively controlling forest fires.
Creator/Author:: Manish, Kumar; Cohen, Kelly, and HomChaudhuri, Baisravan
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2010-07

Spatio-temporal estimation of wildfire growth

Type:: Article
Description/Abstract:: This work presents a methodology for real-time estimation of wildland fire growth, utilizing a fire growth model based on a set of partial differential equations for prediction, and harnessing concepts of space-time Kalman filtering and Proper Orthogonal Decomposition techniques towards low dimensional estimation of potentially large spatio-temporal states. The estimation framework is discussed in its criticality towards potential applications such as forest fire surveillance with unmanned systems equipped with onboard sensor suites. The effectiveness of the estimation process is evaluated numerically over fire growth data simulated using a well-established fire growth model described by coupled partial differential equations. The methodology is shown to be fairly accurate in estimating spatio-temporal process states through noise-ridden measurements for real-time deployability.
Creator/Author:: Sharma, Balaji R.; Cohen, Kelly, and Kumar, Manish
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2013-10

Genetic Fuzzy Trees and their Application Towards Autonomous Training and Control of a Squadron of Unmanned Combat Aerial Vehicles

Article thumbnail: Genetic Fuzzy Trees and their Application Towards Autonomous Training and Control of a Squadron of Unmanned Combat Aerial Vehicles

Type:: Article
Description/Abstract:: This study introduces the technique of Genetic Fuzzy Trees (GFTs) through novel application to an air combat control problem of an autonomous squadron of Unmanned Combat Aerial Vehicles (UCAVs) equipped with next-generation defensive systems. GFTs are a natural evolution to Genetic Fuzzy Systems, in which multiple cascading fuzzy systems are optimized by genetic methods. In this problem a team of UCAV's must traverse through a battle space and counter enemy threats, utilize imperfect systems, cope with uncertainty, and successfully destroy critical targets. Enemy threats take the form of Air Interceptors (AIs), Surface to Air Missile (SAM) sites, and Electronic WARfare (EWAR) stations. Simultaneous training and tuning a multitude of Fuzzy Inference Systems (FISs), with varying degrees of connectivity, is performed through the use of an optimized Genetic Algorithm (GA). The GFT presented in this study, the Learning Enhanced Tactical Handling Algorithm (LETHA), is able to create controllers with the presence of deep learning, resilience to uncertainties, and adaptability to changing scenarios. These resulting deterministic fuzzy controllers are easily understandable by operators, are of very high performance and efficiency, and are consistently capable of completing new and different missions not trained for.
Creator/Author:: Schumacher, Corey; Cohen, Kelly; Ernest, Nicholas; Casbeer, David, and Kivelevitch, Elad
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2015-05

Fuzzy Logic Based Intelligent Agents for Unmanned Combat Aerial Vehicle Control

Type:: Article
Description/Abstract:: Not Available
Creator/Author:: Cohen, Kelly and Ernest, Nick
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2015-12

Comparison of Approximate Approaches to Solving the Travelling Salesman Problem and its Application to UAV Swarming

Type:: Article
Description/Abstract:: Comparison of approximate approaches to solving the Travelling Salesman Problem and its application to UAV swarming. International Journal of Unmanned Systems Engineering. 3(1): 1-16. The Travelling Salesman Problem (TSP) is a widely researched Non-deterministic Polynomial-time hard optimization problem with a range of important applications in a wide spectrum of disciplines including aerospace engineering. In this paper, a comparison of different approaches to solve the TSP and also its application towards swarming of UAVs is considered. The objective of the TSP is to determine the optimal route associated with the shortest tour connecting all targets just once. Genetic Algorithms (GA) are one of the most widely applied techniques for solving this class of optimization problems. Two other techniques, 2-opt and Particle Swarm Optimization, are used and the results are compared with those obtained using GA. The comparison is made for different numbers of targets, using salient figures of merit such as computational time required and the cost function which is the minimum solution (distance) obtained. Results show that the 2-opt approach with the closest neighbour as initial starting point for the search yields superior performance. In the Multiple Travelling Salesman Problem, we propose a cluster-first approach which allocates each specific UAV to a subset of targets. The 200 targets are divided into four clusters corresponding to the four UAVs and then TSP algorithms like 2-opt and GA are employed to solve each cluster. This approach drastically reduces the computational time and also gives much better results than the conventional technique of directly applying GA over the 200 targets.
Creator/Author:: Cohen, Kelly; Boone, Nathan, and Sathyan, Anoop
Submitter:: Kelly Cohen
Date Uploaded:: 02/03/2017
Date Modified:: 04/05/2017
Date Created:: 2015-01

Integration of Computations and Experiments for Flow Control Research With Undergraduate Students

Type:: Article
Description/Abstract:: The methods and outcome of a senior undergraduate project related to the control of a turbulent cylinder wake flow using plasma actuators are summarized in this article. The study integrates computational fluid dynamics (CFD) with experimentation and combines fluid mechanics with flow control research, crossing the boundaries between engineering disciplines.Comput. Appl. Eng. Educ.
Creator/Author:: Cohen, Kelly; McLaughlin, Thomas; Seaver, Christopher A., and Aradag, Selin
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2009-02

Spatio-temporal Estimation Of Wildfire Growth

Type:: Article
Description/Abstract:: This work presents a methodology for real-time estimation of wildland fire growth, utilizing afire growth model based on a set of partial differential equations for prediction, and harnessing concepts of space-time Kalman filtering and Proper Orthogonal Decomposition techniques towards low dimensional estimation of potentially large spatio-temporal states. The estimation framework is discussed in its criticality towards potential applications such as forest fire surveillance with unmanned systems equipped with onboard sensor suites. The effectiveness of the estimation process is evaluated numerically over fire growth data simulated using a well-established fire growth model described by coupled partial differential equations. The methodology is shown to be fairly accurate in estimating spatio-temporal process states through noise-ridden measurements for real-time deploy ability.
Creator/Author:: Sharma, Balaji R.; Cohen, Kelly, and Kumar, Manish
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2013-10

Genetic Fuzzy based Artificial Intelligence for Unmanned Combat Aerial Vehicle Control in Simulated Air Combat Missions

Type:: Article
Description/Abstract:: Breakthroughs in genetic fuzzy systems, most notably the development of the Genetic Fuzzy Tree methodology, have allowed fuzzy logic based Artificial Intelligences to be developed that can be applied to incredibly complex problems. The ability to have extreme performance and computational efficiency as well as to be robust to uncertainties and randomness, adaptable to changing scenarios, verified and validated to follow safety specifications and operating doctrines via formal methods, and easily designed and implemented are just some of the strengths that this type of control brings. Within this white paper, the authors introduce ALPHA, an Artificial Intelligence that controls flights of Unmanned Combat Aerial Vehicles in aerial combat missions within an extreme-fidelity simulation environment. To this day, this represents the most complex application of a fuzzy-logic based Artificial Intelligence to an Unmanned Combat Aerial Vehicle control problem. While development is on-going, the version of ALPHA presented withinwas assessed by Colonel (retired)Gene Lee who described ALPHA as “the most aggressive, responsive, dynamic and credible AI (he’s) seen-to-date.” The quality of these preliminary results in a problem that is not only complex and rife with uncertainties but also contains an intelligent and unrestricted hostile force has significant implications for this type of Artificial Intelligence. This work adds immensely to the body of evidence that this methodology is an ideal solution to a very wide array of problems.
Creator/Author:: Schumacher, Corey; Cohen, Kelly; Ernest, Nicholas; Carroll, David; Lee, Gene, and Clark, Matthew
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2016-03

Passive Damping Augmentation for Vibration Suppression in Flexible Latticed Beam-Like Space Structures

Type:: Article
Description/Abstract:: For a Timoshenko beam model the equations of motion, representing the anisotropic continuum model of a two-dimensional, latticed, large space structure, are extended to include coupling between the extensional, shear and bending modes. This analytical model, applied to a 20-bay, orthogonal, tetrahedral, cantilevered truss structure, is used to determine the transient response when subjected to a unit impulse. It is demonstrated that for beam-like structures having a fixed bending stiffness and beam mass an increase in diagonal stiffness, on account of the stiffness of the vertical girder, leads to a rise in the transverse shear rigidity. This results in higher natural frequencies and a reduction in peak displacement. In addition, in an asymmetrical truss configuration, coupling between the extensional and shear modes raises the maximum peak displacement compared to that obtained for a symmetric truss. The model is modified to investigate the introduction of passive damping in the form of several dynamic vibration absorbers. For a fixed absorber mass budget, a simple yet efficient absorber parameter optimization procedure, based on the classical steady state criteria of a 2-DOF system, is developed to design several absorbers each tuned to a different modal frequency. It is found that inclusion of transverse shear rigidity, as a design parameter in damping augmentation studies, reduces settling time for predetermined maximum peak displacements.
Creator/Author:: Weller, T. and Cohen, Kelly
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 1994-08

An Adaptive Fuzzy Control Algorithm for Model-Independent Active Vibration Damping of Flexible Beam-Like Structures

Type:: Article
Description/Abstract:: The present study deals with an AFCA (Adaptive Fuzzy Control Algorithm) for an Euler-Bemoulli approximation of a two-dimensional version of a cantilever beam-like orthogonal tetrahedral space truss. Transient disturbances, modeled as a unit impulse, excite all the modes of the beam. The resulting transverse displacement at the free end of the beam and its corresponding rate are observed by sensors placed there, and active control of the beam is provided by a collocated force actuator. A design methodology, based on fuzzy logic which assumes no a priori knowledge of plant dynamics, for the closed-loop control algorithm results in relatively quick settling times, low overshoots and dying out of vibration within a few seconds. The control algorithm is enhanced and made much faster by eliminating the need of repeatedly solving the set of differential equations of motion of an emulated dynamic vibration absorber. When the control force is turned off after a mere 15 seconds, almost all the vibrational energy is dissipated as the beam returns to its undisturbed state throughout its length. In addition, the performance of the AFCA is insensitive to varying initial conditions. To examine the robustness of the control system to changes in the temporal dynamics of the cantilever beam, the transient disturbance response to a considerably perturbed plant is simulated. The Young's modulus of the beam was raised as well as lowered by 60%, substantially perturbing the natural frequencies of vibration compared to the nominal plant. The AFCA provided similar settling times and rates of vibrational energy dissipation, satisfying the aim of plant model independence.
Creator/Author:: Abramovich, Haim; Weller, Tanchum; Cohen, Kelly, and Levitas, Joseph
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 1996-03

Model-Independent Vibration Control of Flexible Beam-Like Structures Using a Fuzzy Based Adaptation Strategy

Type:: Article
Description/Abstract:: The present study deals with an AFCA (Adaptive Fuzzy Control Algorithm) for an Euler-Bernoulli approximation of a two-dimensional version of a cantilever beam-like orthogonal tetrahedral space truss. Transient disturbances, modeled as a unit impulse, excite all the modes of the beam. The resulting transverse displacement at the free end of the beam and its corresponding rate are observed by sensors placed there, and active control of the beam is provided by a collocated force actuator. A design methodology for the closed-loop control algorithm that is independent of an exact mathematical model (space-state model, F.E.M., etc.) of plant dynamics and which is based on fuzzy logic is presented. First, the behavior of the open-loop system is observed. Then, the control force applied to the system emulates the behavior of a dynamic vibration absorber which is tuned to the measured fundamental frequency. This approach not only assures inherent stability associated with passive absorbers, but also circumvents the phenomenon of modal spillover. The damping and the mass ratios of the absorber adapt themselves by using a fuzzy decision-making process. This results in relatively quick settling times, low overshoots and dying out of vibration within a few seconds. When the control force is turned off after a mere 16 seconds, almost all the vibrational energy is dissipated. In addition, the performance of the AFCA is insensitive to varying initial conditions. To demonstrate the robustness of the control system to changes in the temporal dynamics of the cantilever beam, the transient response to a considerably perturbed plant is simulated. The Young's modulus of the beam was raised as well as lowered substantially, thereby significantly perturbing the natural frequencies of vibration. The mode shapes, however, remain unchanged. For these cases, too, the AFCA provides similar settling times and rates of vibrational energy dissipation.
Creator/Author:: Abramovich, Haim; Weller, T.; Cohen, Kelly, and Levitas, Joseph
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 1997-03

Control of Linear Second-Order Systems by Fuzzy Logic-Based Algorithm

Type:: Article
Description/Abstract:: The control of exible structures employing the passivity approach has been extended to systems having noncollocated input/output pairs by introducing an observer that incorporates the nominal dynamical model of the plant. The passive observer-based control is applied to the American Control Conference benchmark problem, whereby, the control force emulates a dynamic vibration absorber attached to a virtual wall with passive control elements (spring, mass, and dashpot). The springs and mass elements of the controller are constant, whereas the damping coef cients are selected as time dependent in an attempt to choose continuously the most appropriate amount of damping in compliance with the design goals. A novel approach is introduced, whereby the passive observer-based control law is modi ed by varying the damping coef cient of the virtual dashpot by means of an adaptive fuzzy logic algorithm. This modi ed system exhibits quick settling times and desirable performance characteristics. Results from the statistical robustness analysis for the developed controller are compared to 10 other (linear) solutionsof the benchmarkproblem. The comparisonis based onrobust stability, robust performance (settling time), and control effort. The results obtained by the adaptive fuzzy logic algorithm are superior to those obtained by all other methods, and, consequently, further application of the fuzzy algorithm is advocated.
Creator/Author:: Weller, Tanchum; Cohen, Kelly, and Ben-Asher, Joseph Z.
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2001-06

Active control of flexible structures using a fuzzy logic algorithm

Type:: Article
Description/Abstract:: This study deals with the development and application of an active control law for the vibration suppression of beam-like flexible structures experiencing transient disturbances. Collocated pairs of sensors/actuators provide active control of the structure. A design methodology for the closed-loop control algorithm based on fuzzy logic is proposed. First, the behavior of the open-loop system is observed. Then, the number and locations of collocated actuator/sensor pairs are selected. The proposed control law, which is based on the principles of passivity, commands the actuator to emulate the behavior of a dynamic vibration absorber. The absorber is tuned to a targeted frequency, whereas the damping coefficient of the dashpot is varied in a closed loop using a fuzzy logic based algorithm. This approach not only ensures inherent stability associated with passive absorbers, but also circumvents the phenomenon of modal spillover. The developed controller is applied to the AFWAL/FIB 10 bar truss. Simulated results using MATLAB© show that the closed-loop system exhibits fairly quick settling times and desirable performance, as well as robustness characteristics. To demonstrate the robustness of the control system to changes in the temporal dynamics of the flexible structure, the transient response to a considerably perturbed plant is simulated. The modal frequencies of the 10 bar truss were raised as well as lowered substantially, thereby significantly perturbing the natural frequencies of vibration. For these cases, too, the developed control law provides adequate settling times and rates of vibrational energy dissipation.
Creator/Author:: Weller, Tanchum; Cohen, Kelly, and Ben-Asher, Joseph Z.
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2002-06

Experimental Studies on Adaptive Fuzzy Control of a Smart Structure

Type:: Article
Description/Abstract:: The present investigation deals with the application of an Adaptive Fuzzy Control Algorithm for active vibration control of an experimental flexible beam. The two-dimensional model of the experimental cantilever beam, given by an orthogonal tetrahedral space truss, represents a slender cantilever aluminum (7075-T6) beam of rectangular cross-section (1145 × 60 × 1.95 mm3). A variety of transient disturbances are introduced to excite the first four modes of the beam. The resulting transverse displacements are observed by a single sheet (50 × 50 mm2) of piezoceramic material placed at the clamped end of the beam. Active control of the beam is provided by one, two or three identical sheets of piezoceramic material collocated with the sensor. The control moments applied by the piezoceramic actuator are made to emulate the behavior of a discrete dynamic vibration absorber. The virtual absorber is tuned to the fundamental frequency using classical methods and the tuning ratios are time-invariant. However, the uniqueness of this approach is that the damping parameters of the emulated absorber are continuously varied by means of a fuzzy logic control algorithm to provide near minimum-time suppression of vibration. It is demonstrated that application of this methodology allows for its real-time implementation and provides relatively quick settling times in the closed-loop.
Creator/Author:: Weller, Tanchum; Cohen, Kelly; Ben-Asher, Joseph Z., and Yaffe, Ronith
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2002-08

Flutter Supression Using Linear Optimal and Fuzzy Logic Techniques

Type:: Article
Description/Abstract:: Not available
Creator/Author:: Weller, Tanchum; Moulin, Boris; Cohen, Kelly; Ben-Asher, Joseph Z., and Adin, Zvi
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2002-08

Vibration Control Using Fuzzy-Logic-Based Active Damping

Type:: Article
Description/Abstract:: In this study a general approach is introduced for the design of a robust control law for suppression of structure borne vibration. This control law is based on a passive design in the form of dynamic vibration absorbers. Passive absorbers minimize vibration at a speci c frequency, but their performance is improved by introducing adaptive tuning of the absorber. An adaptive dynamic vibration absorber is tuned to the forcing frequency, using classical methods. The tuning ratio is time varying and adapts itself to variations in the forcing frequency. However, the uniqueness of the approach in this study is that the damping parameter of the absorber is continuously varied by means of a fuzzy-logic control algorithm to provide a lower sound pressure level. The inputs of the fuzzy control law are the displacement and velocity of the main structure. The effectiveness of the control algorithm for active vibration control is demonstrated using MATLAB® simulations of a single-degree-of-freedom plant. This methodology provides superior performance in the presence of signi cant mistuning compared to a more conventional approach.
Creator/Author:: Weller, Tanchum; Cohen, Kelly, and Ben-Asher, Joseph Z.
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2003-04

Closed-Loop Vectoring Control of a Turbulent Jet Using Periodic Excitation

Type:: Article
Description/Abstract:: Closed-loop control strategies were studied experimentally at low Reynolds and incompressible Mach numbers using periodic excitation to vector a turbulent jet. Vectoring was achieved by attaching a short, wide-angle diffuser at the jet exit and introducing periodic excitation from a slot covering one quadrant of the circumference of the round turbulent jet. Closed-loop control methods were applied to transition quickly and smoothly between different jet de ection angles. The frequency response of the zero-mass- ux piezoelectric actuatorwas at to about 0.5 kHz, but the jet responds up to 30–50 Hz only. This is still an order of magnitude faster than conventional thrust vectoring mechanism. System identi cation procedures were applied to approximate the system’s transfer function. A linear controller was designed that enabled fast and smooth transitions between stationary de ection angles and maintained desired jet vectoring angles under varying system conditions. The linear controller was tested over the entire range of available de ection angles, and its performance is evaluated and discussed.
Creator/Author:: Cohen, Kelly; Rapoport, D.; Seifer, A., and Fono, I.
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2003-08

Feedback Control of a Cylinder Wake Low-Dimensional Model

Type:: Article
Description/Abstract:: Not available
Creator/Author:: Cohen, Kelly; Siegel, Stefan; McLaughlin, Thomas, and Gillies, Eric
Submitter:: Kelly Cohen
Date Uploaded:: 02/08/2017
Date Modified:: 04/05/2017
Date Created:: 2003-03

Effective Sensor Placements for the Estimation of Proper Orthogonal Decomposition Mode Coefficients in von Kármán Vortex Street

Article thumbnail: Effective Sensor Placements for the Estimation of Proper Orthogonal Decomposition Mode Coefficients in von Kármán Vortex Street

Type:: Article
Description/Abstract:: For feedback control using low-dimensional proper orthogonal decomposition (POD) models, the mode amplitudes of the POD mode coefficients need to be estimated based on sensor readings. This paper is aimed at suppressing the von Kairman vortex street in the wake of a circular cylinder using a low-dimensional approach based on POD. We compare sensor placement methods based on the spatial distribution of the POD modes to arbitrary ad hoc methods. Flow field data were obtained from Navier-Stokes simulation as well as particle image velocimetry (PIV) measurements. A low-dimensional POD was applied to the snapshot ensembles from the experiment and simulation. Linear stochastic estimation was used to map the sensor readings of the velocity field on the POD mode coefficients. We studied 53 sensor placement configurations, 32 of which were based on POD eigenfunctions and the others using ad hoc methods. The effectiveness of the sensor configurations was investigated at Re = 100 for the computational fluid dynamic data, and for a Reynolds number range of 82-99 for the water tunnel PIV data. Results show that a five-sensor configuration can keep the root mean square estimation error, for the amplitudes of the first two modes to within 4% for simulation data and within 10% for the PIV data. This level of error is acceptable for a moderately robust controller The POD-based design was found to be simpler. more effective, and robust compared to the ad hoc methods examined.
Creator/Author:: Sick, Aaron; Wetlesen, Dave; Cohen, Kelly; Siegel, Stefan, and Cameron, Jeff
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2004-12

Closed-loop approaches to control of a wake flow modeled by the Ginzburg–Landau equation

Type:: Article
Description/Abstract:: A short computational program was undertaken to evaluate the effectiveness of a closed-loop control strategy for the stabilization of an unstable bluff-body flow. In this effort, the non-linear one-dimensional Ginzburg–Landau wake model at 20% above the critical Reynolds number was studied. The numerical model, which is a non-linear partial differential equation with complex coefficients, was solved using the FEMLAB®/MATLAB® software packages and validated by comparison with published literature. At first, a model independent approach was attempted for wake suppression using feedback control. The closed-loop system was controlled using a conventional proportional-integral-derivative (PID) controller as well as a non-linear fuzzy controller. A single sensor is used for feedback, and the actuator is represented by altering the boundary conditions of the cylinder. Simulation results indicate that for a single sensor scheme, the increase in the sophistication of the control results in significantly shorter settling times. However, there is only a marginal improvement concerning the suppression of the wake at higher Reynolds numbers. The feedback control design was then augmented by switching over to a model-dependent controller. Based on computationally generated data obtained from solving the unforced wake, a low-dimensional model of the wake was developed and evaluated. The low-dimensional model of the unforced Ginzburg–Landau equation captures more than 99.8% of the kinetic energy using just two modes. Two sensors, placed in the absolutely unstable region of the wake, are used for real-time estimation of the first two modes. The estimator was developed using the linear stochastic estimation scheme. Finally, the loop is closed using a PID controller that provides the command input to the variable boundary conditions of the model. This method is relatively simple and easy to implement in a real-time scenario. The control approach, applied to the 300 node FEMLAB® model at 20% above the unforced critical Reynolds number stabilizes the entire wake. Compared to the model-independent controllers, the controller based on the low-dimensional model is far more effective in the suppression of the wake at higher Reynolds numbers. Furthermore, while the latter approach employs only the estimated temporal amplitude of the first mode of the imaginary part of the amplitude, all higher modes are stabilized. This suggests that the higher order modes are caused by a secondary instability that is suppressed once the primary instability is controlled.
Creator/Author:: Myatt, James; Cohen, Kelly; Siegel, Stefan; McLaughlin, Thomas, and Gillies, Eric
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2005-09

A heuristic approach to effective sensor placement for modeling of a cylinder wake

Type:: Article
Description/Abstract:: The effectiveness of a sensor configuration for feedback flow control on the wake of a circular cylinder is investigated in both direct numerical simulation as well as in a water tunnel experiment. The research program is aimed at suppressing the von Kármán vortex street in the wake of a cylinder at a Reynolds number of 100. The design of sensor number and placement was based on data from a laminar two-dimensional simulation of the Navier–Stokes equations for the unforced condition. A low-dimensional proper orthogonal decomposition (POD) was applied to the vorticity calculated from the flow field and sensor placement was based on the intensity of the resulting spatial eigenfunctions. The numerically generated data was comprised of 70 snapshots taken over three cycles from the steady state regime. A linear stochastic estimator (LSE) was employed to map the velocity data to the temporal coefficients of the reduced order model. The capability of the sensor configuration to provide accurate estimates of the four low-dimensional states was validated experimentally in a water tunnel at a Reynolds number of 108. For the experimental wake, a sample of 200 particle image velocimetry (PIV) measurements was used. Results show that for experimental data, the root mean square estimation error of the estimates of the first two modes was within 6% of the desired values and for the next two modes was within 20% of the desired values. This level of error is acceptable for a moderately robust controller.
Creator/Author:: Cohen, Kelly; Siegel, Stefan, and McLaughlin, Thomas
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2006-01

Numerical Simulations of a Feedback-Controlled Circular CylinderWake

Type:: Article
Description/Abstract:: The effect of feedback flow control on the wake of a circular cylinder at a Reynolds number of 100 is investigated in direct numerical simulation. The control approach uses a low-dimensional model based on proper orthogonal decomposition (POD). The controller applies linear proportional and differential feedback to the estimate of the first POD mode. The range of validity of the POD model is explored in detail. Actuation is implemented as displacement of the cylinder normal to the flow. It is demonstrated that the threshold peak amplitude below which the control actuation ceases to be effective is in the order of 5% of the cylinder diameter. The closed-loop feedback simulations explore the effect of both fixed-phase and variable-phase feedback on the wake. Whereas fixed-phase feedback is effective in reducing drag and unsteady lift, it fails to stabilize this state once the low drag state has been reached. Variable-phase feedback, however, achieves the same drag and unsteady lift reductions while being able to stabilize the flow in the low drag state. In the low drag state, the near wake is entirely steady, whereas the far wake exhibits vortex shedding at a reduced intensity. A drag reduction of 15% of the drag was achieved, and the unsteady lift force was lowered by 90%.
Creator/Author:: Cohen, Kelly; Siegel, Stefan, and McLaughlin, Thomas
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2006-06

Experimental estimation of a D-shaped cylinder wake using body-mounted sensors

Type:: Article
Description/Abstract:: The effectiveness of a small array of body-mounted sensors, for estimation and eventually feedback flow control of a D-shaped cylinder wake is investigated experimentally. The research is aimed at suppressing unsteady loads resulting from the von-Kármán vortex shedding in the wake of bluff-bodies at a Reynolds number range of 100–1,000. A low-dimensional proper orthogonal decomposition (POD) procedure was applied to the stream-wise and cross-stream velocities in the near wake flow field, with steady-state vortex shedding, obtained using particle image velocimetry (PIV). Data were collected in the unforced condition, which served as a baseline, as well as during influence of forcing within the “lock-in” region. The design of sensor number and placement was based on data from a laminar direct numerical simulation of the Navier-Stokes equations. A linear stochastic estimator (LSE) was employed to map the surface-mounted hot-film sensor signals to the temporal coefficients of the reduced order model of the wake flow field in order to provide accurate yet compact estimates of the low-dimensional states. For a three-sensor configuration, results show that the estimation error of the first two cross-stream modes is within 20–40% of the PIV-generated POD time coefficients. Based on previous investigations, this level of error is acceptable for a moderately robust controller required for feedback flow control.
Creator/Author:: Cohen, Kelly; Stalnov, Oksana; Fono, Ilan; Seifert, Avi, and Palei, Vitali
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2007-02

Low-dimensional modelling of a transient cylinder wake using double proper orthogonal decomposition

Type:: Article
Description/Abstract:: For the systematic development of feedback flow controllers, a numerical model that captures the dynamic behaviour of the flow field to be controlled is required. This poses a particular challenge for flow fields where the dynamic behaviour is nonlinear, and the governing equations cannot easily be solved in closed form. This has led to many versions of low-dimensional modelling techniques, which we extend in this work to represent better the impact of actuation on the flow. For the benchmark problem of a circular cylinder wake in the laminar regime, we introduce a novel extension to the proper orthogonal decomposition (POD) procedure that facilitates mode construction from transient data sets. We demonstrate the performance of this new decomposition by applying it to a data set from the development of the limit cycle oscillation of a circular cylinder wake simulation as well as an ensemble of transient forced simulation results. The modes obtained from this decomposition, which we refer to as the double POD (DPOD) method, correctly track the changes of the spatial modes both during the evolution of the limit cycle and when forcing is applied by transverse translation of the cylinder. The mode amplitudes, which are obtained by projecting the original data sets onto the truncated DPOD modes, can be used to construct a dynamic mathematical model of the wake that accurately predicts the wake flow dynamics within the lock-in region at low forcing amplitudes. This low dimensional model, derived using nonlinear artificial neural network based system identification methods, is robust and accurate and can be used to simulate the dynamic behaviour of the wake flow. We demonstrate this ability not just for unforced and open-loop forced data, but also for a feedback-controlled simulation that leads to a 90% reduction in lift fluctuations. This indicates the possibility of constructing accurate dynamic low-dimensional models for feedback control by using unforced and transient forced data only.
Creator/Author:: Luchtenburg, D. M.; Cohen, Kelly; Seidel, Jurgen; Fagley, Casey, and Siegel, Stefan G.
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2008-09

Introduction: Enhancing Intelligence in Aerospace Systems

Type:: Article
Description/Abstract:: Not available.
Creator/Author:: Gregory, Irene; Figueroa, Fernando; Cohen, Kelly; Ingham, Michel; Atkins, Ella; Obayashi, Shigeru; Truszkowski, Walt; Garg, Sanjay; Blackmore, Lars; Doyle, Richard, and Nguyen, Nhan
Submitter:: Kelly Cohen
Date Uploaded:: 02/10/2017
Date Modified:: 04/05/2017
Date Created:: 2009-03

Spatially Distributed Forcing and Jet Vectoring with a Plasma Actuator

Type:: Article
Description/Abstract:: The ability to spatially alter both the amount of body force along the span of a plasma actuator and the angle of the resulting jet relative to the surface has been demonstrated. A dielectric barrier discharge plasma actuator consists of two electrodes separated by a dielectric barrier, which imparts momentum to the surrounding fluid parallel to the dielectric. To investigate a technique to shape the spanwise body force created by the plasma actuator, a control volume momentum balance was used. By shaping the buried electrode along the span of the actuator, the local volume of plasma generated can be controlled, which is related to the local body force. Pressure measurements were taken in the boundary layer behind the actuator to calculate the momentum imparted to the flow at various spanwise locations corresponding to different electrode widths. Particle image velocimetry data were then used to show that spatially varying, steady jets could be created with the use of only one actuator by varying the width of the buried electrode in a quiescent flow. The angle of the jet created, relative to the dielectric, by a plasma synthetic jet is also investigated. By pointing two plasma actuators at each other, an inverted impinging jet can be created as a result of the two independent jets colliding. By altering the strength of one of the jets relative to the other, the angle of separation can be changed. Particle image velocimetry data were taken to show the effects of altering the voltage (strength) applied to one of the actuators relative to the other. It was found that, with this method, jet vectoring could be achieved. The angle of the jet could be controlled a full 180 deg through small changes in the voltage applied to the electrodes, also in a quiescent flow.
Creator/Author:: Enloe, C. L.; Cohen, Kelly; Porter, C.; McLaughlin, T., and Abbas, A.
Submitter:: Kelly Cohen
Date Uploaded:: 02/13/2017
Date Modified:: 04/05/2017
Date Created:: 2009-06

Multi-Agent Maze Exploration

Type:: Article
Description/Abstract:: Mazes have intrigued the human mind for thousands of years, and have been used to measure cognitive abilities of laboratory animals. In recent years, mazes have been used to examine the artificial intelligence of robots by observing their ability to traverse mazes using algorithm for maze exploration and exploitation.A simulation of a multi-agent system is used to demonstrate the benefits of utilizing a group of several robots in maze exploration. Using a behavioral algorithm based on Tarry’s algorithm, it is shown that the group performance improves and becomes more robust as the number of robots increases. In addition, the amount of data transfer required for group coordination can be minimized to a small set of data items, which is independent of either the number of robots in the group or the maze size.As a result, the above multi-agent approach can be scaled up to mazes or groups of any size, as indicated by the results of the MATLAB-based simulation.
Creator/Author:: Cohen, Kelly and Kivelvitch, Elad H.
Submitter:: Kelly Cohen
Date Uploaded:: 02/13/2017
Date Modified:: 04/05/2017
Date Created:: 2010-12

Cooperative Control of Multiple Uninhabited Aerial Vehicles for Monitoring and FightingWildfires

Type:: Article
Description/Abstract:: Uninhabited aerial vehicles provide numerous advantages in fighting wildland fires that include persistent operation and elimination of humans from performing what can be dull, dangerous, and dirty work. Multiple cooperating uninhabited aerial vehicles can potentially bring about a paradigm shift in the way we fight complex wildland fires. This paper investigates algorithmic development for cooperative control of a number of uninhabited aerial vehicles engaged in fighting a wildland fire. The paper considers two tasks to be performed by a group of uninhabited aerial vehicles: 1) Cooperative tracking of a fire front for accurate situational awareness, and 2) cooperative, autonomous fire fighting using fire suppressant fluid. The scenario considered in this paper makes the following assumptions: information regarding the location of the fire and position of all uninhabited aerial vehicles is made available to each uninhabited aerial vehicle; and each uninhabited aerial vehicle is equipped with unlimited fire suppressant fluid which extinguishes fire in a circle of specified area directly beneath it. This paper formulates these two tasks of fire fighting based upon optimization of respective utility functions, develops a decentralized control method for the cooperative uninhabited aerial vehicles, and analyzes the system for its stability and its ability to carry out the tasks. The proposed strategies have been verified with the help of extensive simulations. Although simplifying assumptions have been made, this preliminary study presents a framework for path planning and cooperative control of multiple uninhabited aerial vehicles engaged in gathering data and actively fighting forest fires.
Creator/Author:: Cohen, Kelly; KomChaudhuri, Baisravan, and Kumar, Manish
Submitter:: Kelly Cohen
Date Uploaded:: 02/13/2017
Date Modified:: 04/05/2017
Date Created:: 2011-01

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