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- Type:
- Article
- 摘抄:
- This paper uses multilevel modeling of Hamilton County individual travel activity data.
- 作者:
- Wang, Shujie and Kim, Changjoo
- 提交者:
- Changjoo Kim
- 上传日期:
- 02/02/2015
- 更改日期:
- 05/23/2019
- 创建:
- 2015-02-02
- 证书:
- Attribution-NoDerivs 4.0 International
-
- Type:
- Article
- 摘抄:
- 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.
- 作者:
- Madireddy, Sandeep; Vemaganti, Kumar, and Sista, Bhargava
- 提交者:
- Kumar Vemaganti
- 上传日期:
- 01/21/2015
- 更改日期:
- 05/23/2019
- 创建:
- 2015-01-21
- 证书:
- All rights reserved
-
- Type:
- Document
- 摘抄:
- 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.
- 作者:
- Petach, Jay
- 提交者:
- Jay Petach
- 上传日期:
- 12/06/2016
- 更改日期:
- 12/06/2016
- 创建:
- 2016-12-05
- 证书:
- All rights reserved
-
- Type:
- Document
- 摘抄:
- 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.
- 作者:
- Petach, Jay
- 提交者:
- Jay Petach
- 上传日期:
- 12/06/2016
- 更改日期:
- 05/23/2019
- 创建:
- 2016-12-05
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- Lloyd C. Engelbrecht (born 1927) is Professor Emeritus of Art History at the University of Cincinnati. In collaboration with his late wife, June-Marie F. Engelbrecht (1930-2009), he has been researching, writing about and speaking about architect and designer Henry C. Trost (1860-1933) and his family firm of Trost & Trost. On May 8, 2014, Lloyd Engelbrecht was invited to speak at the University of Texas at El Paso as part of a Trost symposium. The following is an excerpt from the official announcement of the symposium: In celebration of Trost’s architectural legacy, UTEP Special Collections will host the “Trost Lecture Series” at 6 p.m. May 8 [2014] in the UTEP Library, Blumberg Auditorium, room 111. The event will feature speakers Dr. Troy Ainsworth, executive director of El Camino Real de Tierra Adentro Trail Association (CARTA); Joe and Lanna Duncan, owners of the Trost-designed El Capitan Hotel in Van Horn, Texas and El Paisano Hotel in Marfa, Texas; and Dr. Lloyd Engelbrecht, co-author of Henry C. Trost: Architect of the Southwest. A public exhibit featuring family photos, sketches, blueprints and photographs of the buildings Trost designed in El Paso and throughout the Southwest will be on display May 10 in the UTEP Library’s atrium on the third floor. The lecture and exhibit were part of Trost Week, May 3-10, 2014, which was organized by the Texas Trost Society, a new nonprofit group that advocates for the preservation of Trost & Trost architecture.
- 作者:
- Engelbrecht, Lloyd C.
- 提交者:
- Lloyd C. Engelbrecht
- 上传日期:
- 06/12/2015
- 更改日期:
- 09/17/2015
- 证书:
- All rights reserved
-
- Type:
- Generic Work
- 摘抄:
- This collection contains all posters and documentation related to my own presentations
- 作者:
- Koshoffer, Amy
- 提交者:
- Amy Koshoffer
- 上传日期:
- 10/27/2017
- 更改日期:
- 11/02/2017
- 创建:
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- The study of the propagation of multiple cracks is essential to modeling and predicting structural integrity. The interaction between two cracks depends on a number of factors such as the domain geometry, the relative crack sizes and the separation between the two crack tips. In this paper, we study the interaction between two dynamically propagating cracks. We use the phase field method to track the crack paths, since this method can handle complex crack behavior such as crack branching, without any ad hoc criteria for crack evolution. The results from our dynamic simulations indicate that, unlike crack inter- action under quasi-static or fatigue loading, the presence of another crack does not accelerate crack propagation when dynamic loads are applied. However, some similarities in the crack topologies are observed for both quasi-static and dynamic loading.
- 作者:
- Kumar Vemaganti and Sai Deogekar
- 提交者:
- Kumar Vemaganti
- 上传日期:
- 10/11/2017
- 更改日期:
- 10/11/2017
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- Several constitutive theories have been proposed in the literature to model the viscoelastic response of soft tissue, including widely used rheological constitutive models. These models are characterized by certain parameters (“time constants”) that define the time scales over which the tissue relaxes. These parameters are primarily obtained from stress relaxation experiments using curve-fitting techniques. However, the question of how best to estimate these time constants remains open. As a step towards answering this question, we develop an optimal experimental design approach based on ideas from information geometry, namely Fisher information and Kullback-Leibler divergence. Tissue is modeled as a standard linear solid and described using a one- or two-term Prony series. Treating the time constants as unknowns, we develop expressions for the Fisher information and Kullback-Leibler divergence that allow us to maximize information gain from experimental data. Based on the results of this study, we propose that the largest time constant estimated from a stress relaxation experiment for a linear viscoelastic material should be at most one-fifth of the total time of the experiment in order to maximize information gain.
- 作者:
- Kumar Vemaganti and Sandeep Madireddy
- 提交者:
- Kumar Vemaganti
- 上传日期:
- 10/11/2017
- 更改日期:
- 10/11/2017
- 证书:
- All rights reserved
-
- Type:
- Document
- 摘抄:
- 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.
- 作者:
- Petach, Jay
- 提交者:
- Jay Petach
- 上传日期:
- 12/06/2016
- 更改日期:
- 12/06/2016
- 创建:
- 2016-12-05
- 证书:
- All rights reserved
-
- Type:
- Article
- 摘抄:
- Cincinnati's struggle for fair housing has been a long and often contested one. A handful of neighborhoods in the Queen City and its metropolitan area are now stably racially integrated and more seem likely to join that number in the near future. Yet there is much more work to be done, as the metropolitan area as a whole remains one of the most segregated in the nation.
- 作者:
- Casey-Leininger, Charles
- 提交者:
- Charles Casey-Leininger
- 上传日期:
- 09/29/2017
- 更改日期:
- 09/29/2017
- 证书:
- Attribution-NonCommercial-NoDerivs 4.0 International