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- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Cohen, Kelly; Sabo, Chelsea, and Kingston, Derek
- 提交者:
- Kelly Cohen
- 上传日期:
- 02/03/2017
- 更改日期:
- 04/05/2017
- 创建:
- 2014-01
- 证书:
- All rights reserved
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- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Sharma, Balaji R.; Cohen, Kelly; Ernest, Nicholas; Kumar, Manish, and Kivelevitch, Elad
- 提交者:
- Kelly Cohen
- 上传日期:
- 02/03/2017
- 更改日期:
- 04/05/2017
- 创建:
- 2014-01
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Koshoffer, Amy; Hansen, Carolyn, and Newman, Linda
- 提交者:
- Amy Koshoffer
- 上传日期:
- 01/30/2017
- 更改日期:
- 02/21/2017
- 创建:
- 2016-02-12
- 证书:
- Attribution-NonCommercial-NoDerivs 4.0 International
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- Type:
- Media
- 摘抄:
- 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.
- 作者:
- Hart, Olga and Bach, Pamela
- 提交者:
- Olga Hart
- 上传日期:
- 01/26/2017
- 更改日期:
- 01/26/2017
- 证书:
- Attribution-NonCommercial-NoDerivs 4.0 International
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- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Tansey, Eira
- 提交者:
- Eira Tansey
- 上传日期:
- 01/27/2016
- 更改日期:
- 01/27/2016
- 创建:
- 2015-06-05
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- Description of a new web application to support collection development at University of Cincinnati Libraries.
- 作者:
- Van Mil, James and Crowe, Sean
- 提交者:
- Sean Crowe
- 上传日期:
- 06/30/2015
- 更改日期:
- 07/27/2016
- 创建:
- 2015-01
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Sarofeen, George
- 提交者:
- George Sarofeen
- 上传日期:
- 12/09/2014
- 更改日期:
- 05/23/2019
- 创建:
- 2014-12-09
- 证书:
- All rights reserved
-
- Type:
- Generic Work
- 摘抄:
- 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.
- 作者:
- DiDomenico, Steve and Newman, Linda
- 提交者:
- Linda Newman
- 上传日期:
- 08/08/2015
- 更改日期:
- 06/13/2016
- 创建:
- 2015-08-07
- 证书:
- Attribution-NonCommercial-NoDerivs 4.0 International
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- Type:
- Dataset
- 摘抄:
- 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.
- 作者:
- Wallrodt, John
- 提交者:
- John Wallrodt
- 上传日期:
- 10/24/2014
- 更改日期:
- 09/17/2015
- 创建:
- 2014-10-24
- 证书:
- Attribution 4.0 International
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- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Engelbrecht, Lloyd C.
- 提交者:
- Lloyd C. Engelbrecht
- 上传日期:
- 10/15/2014
- 更改日期:
- 07/27/2016
- 创建:
- 2014-10-15
- 证书:
- All rights reserved