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Articles 211 - 240 of 6388
Full-Text Articles in Engineering
Reducing Over-Conservative Expert Failure Rate Estimates In The Presence Of Limited Data: A New Probabilistic/Fuzzy Approach, Carlos M. Ferregut, F. Joshua Campos, Vladik Kreinovich
Reducing Over-Conservative Expert Failure Rate Estimates In The Presence Of Limited Data: A New Probabilistic/Fuzzy Approach, Carlos M. Ferregut, F. Joshua Campos, Vladik Kreinovich
Departmental Technical Reports (CS)
From Single To Double Use Expressions, With Applications To Parametric Interval Linear Systems: On Computational Complexity Of Fuzzy And Interval Computations, Joseph A Lorkowski
From Single To Double Use Expressions, With Applications To Parametric Interval Linear Systems: On Computational Complexity Of Fuzzy And Interval Computations, Joseph A Lorkowski
Departmental Technical Reports (CS)
How To Tell When A Product Of Two Partially Ordered Spaces Has A Certain Property: General Results With Application To Fuzzy Logic, Francisco Zapata, Olga Kosheleva, Karen Villaverde
How To Tell When A Product Of Two Partially Ordered Spaces Has A Certain Property: General Results With Application To Fuzzy Logic, Francisco Zapata, Olga Kosheleva, Karen Villaverde
Departmental Technical Reports (CS)
In this paper, we describe how checking whether a given property F is true for a product A1 X A2 of partially ordered spaces can be reduced to checking several related properties of the original spaces Ai.
This result is useful in fuzzy logic, where, to compare our degree of confidence in several statements, we often need to combine relative confidence comparison results provided by different experts. For example, Cartesian product corresponds to the cautious approach, when our confidence in S' is higher than confidence in S if and only if all the experts are more confident in S' than …
Fundamental Physical Equations Can Be Derived By Applying Fuzzy Methodology To Informal Physical Ideas, Eric Gutierrez, Vladik Kreinovich
Fundamental Physical Equations Can Be Derived By Applying Fuzzy Methodology To Informal Physical Ideas, Eric Gutierrez, Vladik Kreinovich
Departmental Technical Reports (CS)
Towards Optimal Placement Of Bio-Weapon Detectors, Chris Kiekintveld, Octavio Lerma
Towards Optimal Placement Of Bio-Weapon Detectors, Chris Kiekintveld, Octavio Lerma
Departmental Technical Reports (CS)
Fusing Continuous And Discrete Data, On The Example Of Merging Seismic And Gravity Models In Geophysics, Omar Ochoa, Aaron Velasco, Vladik Kreinovich
Fusing Continuous And Discrete Data, On The Example Of Merging Seismic And Gravity Models In Geophysics, Omar Ochoa, Aaron Velasco, Vladik Kreinovich
Departmental Technical Reports (CS)
In many application areas, we need to fuse continuous and discrete models of the same phenomena. For example, in geophysics, we have two main models for describing how the sound velocity changes with location and depth: a discrete gravity-based model, in which we have several layers with abrupt transition between layers, and a seismic model, in which the velocity continuously changes with the change in location and depth -- and a transition is represented by a steeper change. Due to inevitable uncertainty, in two fused models, the same actual transition is placed at slightly different depths.
If we simply fuse …
From Program Synthesis To Optimal Program Synthesis, Joaquin Reyna
From Program Synthesis To Optimal Program Synthesis, Joaquin Reyna
Departmental Technical Reports (CS)
In many practical situations, we know the values of some quantities x1, ..., xn, we know the relations between these quantities, the desired quantity y, and maybe some auxiliary quantities, and we want to estimate y. There exist automatic tools for such estimations -- called program synthesis tools.
A program synthesis tool usually generates a program for computing y. In many cases, however, several such programs are possible, and it is desirable to generate the optimal (e.g., the fastest) program. In this paper, we describe algorithms aimed at such optimal program synthesis.
The problem can be …
Adding Constraints -- A (Seemingly Counterintuitive But) Useful Heuristic In Solving Difficult Problems, Olga Kosheleva, Martine Ceberio, Vladik Kreinovich
Adding Constraints -- A (Seemingly Counterintuitive But) Useful Heuristic In Solving Difficult Problems, Olga Kosheleva, Martine Ceberio, Vladik Kreinovich
Departmental Technical Reports (CS)
Intuitively, the more constraints we impose on a problem, the more difficult it is to solve it. However, in practice, difficult-to-solve problems sometimes get solved when we impose additional constraints and thus, make the problems seemingly more complex. In this methodological paper, we explain this seemingly counter-intuitive phenomenon, and we show that, dues to this explanation, additional constraints can serve as a useful heuristic in solving difficult problems.
How To Bargain: An Interval Approach, Vladik Kreinovich, Hung T. Nguyen, Songsak Sriboonchitta
How To Bargain: An Interval Approach, Vladik Kreinovich, Hung T. Nguyen, Songsak Sriboonchitta
Departmental Technical Reports (CS)
In many real-life situations, we need to bargain. What is the best bargaining strategy? If you are already in a negotiating process, your previous offer was a, the seller's last offer was A > a, what next offer a' should you make? A usual commonsense recommendation is to "split the difference", i.e., to offer a' = (a + A) / 2, or, more generally, to offer a linear combination a' = k * A + (1 - k) * a (for some parameter k from the interval (0,1)).
The bargaining problem falls under the scope of …
Why Curvature In L-Curve: Combining Soft Constraints, Uram Anibal Sosa Aguirre, Martine Ceberio, Vladik Kreinovich
Why Curvature In L-Curve: Combining Soft Constraints, Uram Anibal Sosa Aguirre, Martine Ceberio, Vladik Kreinovich
Departmental Technical Reports (CS)
In solving inverse problems, one of the successful methods of determining the appropriate value of the regularization parameter is the L-curve method of combining the corresponding soft constraints, when we plot the curve describing the dependence of the logarithm $x$ of the mean square difference on the logarithm $y$ of the mean square non-smoothness, and select a point on this curve at which the curvature is the largest. This method is empirically successful, but from the theoretical viewpoint, it is not clear why we should use curvature and not some other criterion. In this paper, we show that reasonable scale-invariance …
Universal Approximation With Uninorm-Based Fuzzy Neural Networks, Andre Lemos, Vladik Kreinovich, Walmir Caminhas, Fernando Gomide
Universal Approximation With Uninorm-Based Fuzzy Neural Networks, Andre Lemos, Vladik Kreinovich, Walmir Caminhas, Fernando Gomide
Departmental Technical Reports (CS)
Model-Based Analysis Of Electric Drive Options For Medium-Duty Parcel Delivery Vehicles, Robb A. Barnitt, Aaron D. Brooker, Laurie Ramroth
Model-Based Analysis Of Electric Drive Options For Medium-Duty Parcel Delivery Vehicles, Robb A. Barnitt, Aaron D. Brooker, Laurie Ramroth
Publications (T)
Medium-duty vehicles are used in a broad array of fleet applications, including parcel delivery. These vehicles are excellent candidates for electric drive applications due to their transient-intensive duty cycles, operation in densely populated areas, and relatively high fuel consumption and emissions. The National Renewable Energy Laboratory (NREL) conducted a robust assessment of parcel delivery routes and completed a model-based techno-economic analysis of hybrid electric vehicle (HEV) and plug-in hybrid electric vehicle (PHEV) configurations. First, NREL characterized parcel delivery vehicle usage patterns, most notably daily distance driven and drive-cycle intensity. Second, drive-cycle analysis results framed the selection of drive cycles used …
Characterization Of Acetogenic And Methanogenic Leachates Generated From A Sanitary Landfill Site, Aik Heng Lee, Hamid Nikraz, Yung Tse Hung
Characterization Of Acetogenic And Methanogenic Leachates Generated From A Sanitary Landfill Site, Aik Heng Lee, Hamid Nikraz, Yung Tse Hung
Civil and Environmental Engineering Faculty Publications
Decomposition processes take place in landfill generate leachates that can be categorized mainly of acetogenic and methanogenic in nature. BOD:COD ratio computed in this study for a landfill site over a 3 years duration revealed as a good indicator to identify acetogenic leachate from methanogenic leachate. Correlation relationships to predict pollutant level taking into consideration of climatic condition are derived.
A Fiber Bragg Grating-Based All-Fiber Sensing Systems For Telerobotic Cutting Applications, Ginu Rajan, Dean Callaghan, Yuliya Semenova, Mark Mcgrath, Eugene Coyle, Gerald Farrell
A Fiber Bragg Grating-Based All-Fiber Sensing Systems For Telerobotic Cutting Applications, Ginu Rajan, Dean Callaghan, Yuliya Semenova, Mark Mcgrath, Eugene Coyle, Gerald Farrell
Articles
A fiber Bragg grating (FBG)-based strain sensing system for minimally invasive telerobotic cutting applications is presented in this paper. Investigations assume that a scissor blade can be approximated as a uniformly tapered cantilever beam. A replica of the scissor blade is produced and strain characterization has been carried out using an FBG sensor system. Results are validated against measurements obtained using conventional electrical resistance strain gauges. The scissor blade experiences both direct and lateral forces during cutting, hence the system is characterized for a direct load range of 0-30 N and a lateral load range of 0-10 N. The results …
Home Owners’ Attitudes, Perceptions And Willingness To Pay For Microgeneration Technologies, Marius Claudy, Aidan O'Driscoll, Aidan Duffy
Home Owners’ Attitudes, Perceptions And Willingness To Pay For Microgeneration Technologies, Marius Claudy, Aidan O'Driscoll, Aidan Duffy
Reports
This report evaluates Irish home owners’ perceptions, attitudes and willingness to pay (WTP) for microgeneration technologies, including photovoltaic (solar panels),[1] solar water heaters, micro wind turbines and wood pellet boilers.
The data presented in the report stem from two large-scale surveys, both designed by Technological University Dublin (DIT) and commissioned on behalf of Sustainable Energy Authority Ireland (SEAI) and DIT. The first study gathered data on Irish people’s general awareness of microgeneration technologies and was conducted in March 2009. The second and main survey targeted Irish home owners in order to understand their perceptions of and attitudes to microgeneration. …
Nanofabrication Of Surface-Enhanced Raman Scattering Device By An Integrated Block-Copolymer And Nanoimprint Lithography Method, E. L. Yang, C. C. Liu, C. Y.P. Yang, P. F. Nealey, C. A. Steinhaus, Jack L. Skinner
Nanofabrication Of Surface-Enhanced Raman Scattering Device By An Integrated Block-Copolymer And Nanoimprint Lithography Method, E. L. Yang, C. C. Liu, C. Y.P. Yang, P. F. Nealey, C. A. Steinhaus, Jack L. Skinner
Mechanical Engineering
The integration of block-copolymers and nanoimprint lithography presents a novel and cost-effective approach to achieving nanoscale patterning capabilities. The authors demonstrate the fabrication of a surface-enhanced Raman scattering device using templates created by the block-copolymers nanoimprint lithography integrated method.
47th Conference On Senior Engineering Design, College Of Engineering And Applied Sciences
47th Conference On Senior Engineering Design, College Of Engineering And Applied Sciences
Senior Engineering Design Conference
The 47th Conference on Senior Engineering Design Projects was held on December 7, 2010 at the College of Engineering and applied Sciences on the Parkview Campus of Western Michigan University. The college sponsors the conference to showcase the work of its graduating seniors, who are required to complete a capstone project that puts into practice what they have learned. Many of the projects are sponsored by business and industry.
Singular Value Decomposition Metrics Show Limitations Of Detector Design In Diffuse Fluorescence Tomography, Frederic Leblond, Kenneth M. Tichauer, Brian W. Pogue
Singular Value Decomposition Metrics Show Limitations Of Detector Design In Diffuse Fluorescence Tomography, Frederic Leblond, Kenneth M. Tichauer, Brian W. Pogue
Dartmouth Scholarship
The spatial resolution and recovered contrast of images reconstructed from diffuse fluorescence tomography data are limited by the high scattering properties of light propagation in biological tissue. As a result, the image reconstruction process can be exceedingly vulnerable to inaccurate prior knowledge of tissue optical properties and stochastic noise. In light of these limitations, the optimal source-detector geometry for a fluorescence tomography system is non-trivial, requiring analytical methods to guide design. Analysis of the singular value decomposition of the matrix to be inverted for image reconstruction is one potential approach, providing key quantitative metrics, such as singular image mode spatial …
The Changing Patterns Of Internet Usage, Christopher S. Yoo
The Changing Patterns Of Internet Usage, Christopher S. Yoo
Federal Communications Law Journal
Symposium: Essays from Time Warner Cable's Research Program on Digital Communications.
The Challenge Of Increasing Broadband Capacity, Dale N. Hatfield
The Challenge Of Increasing Broadband Capacity, Dale N. Hatfield
Federal Communications Law Journal
Symposium: Essays from Time Warner Cable's Research Program on Digital Communications.
Postures Féminines Dans L’Oeuvre De Calixthe Beyala, Carmen Husti-Laboye
Postures Féminines Dans L’Oeuvre De Calixthe Beyala, Carmen Husti-Laboye
Présence Francophone: Revue internationale de langue et de littérature
The aim of this paper is to analyze, through the example of the feminist positions proposed by Calixthe Beyala in the novels she wrote between 1987 and 2007, the change of the novelist’s ideological and artistic perspective. It emphasizes the progressive loss of critical voice to the advantage of a new voice wishing to understand itself as individuality in its world. This study reveals the novelist’s contribution to the construction of a new position of the individual in the context of French social and cultural life.
Creating Tomorrow, Fall 2010, College Of Engineering
Creating Tomorrow, Fall 2010, College Of Engineering
College of Engineering Magazines
Annual magazine of the College of Engineering at Utah State University.
Uncertainty Propagation In A Multiscale Model Of Nanocrystalline Plasticity, Marisol Koslowski, Alejandro Strachan
Uncertainty Propagation In A Multiscale Model Of Nanocrystalline Plasticity, Marisol Koslowski, Alejandro Strachan
PRISM: NNSA Center for Prediction of Reliability, Integrity and Survivability of Microsystems
We characterize how uncertainties propagate across spatial and temporal scales in a physicsbased model of nanocrystalline plasticity of fcc metals. Our model combines molecular dynamics (MD) simulations to characterize atomic level processes that govern dislocation basedplastic deformation with a phase field approach to dislocation dynamics (PFDD) that describes how an ensemble of dislocations evolve and interact to determine the mechanical response of the material. We apply this approach to a nanocrystalline Ni specimen of interest in micro-electromechanical (MEMS) switches. Our approach enables us to quantify how internal stresses that result from the fabrication process affect the properties of dislocations (using …
High Switching Endurance In TaoX Memristive Devices, Jianhua Yang, M Zhang, John Strachan, Feng Miao, Matthew Pickett, Ronald Kelley
High Switching Endurance In TaoX Memristive Devices, Jianhua Yang, M Zhang, John Strachan, Feng Miao, Matthew Pickett, Ronald Kelley
Electrical and Computer Engineering Faculty Publication Series
We demonstrate over 1×1010 open-loop switching cycles from a simple memristive device stack of Pt/TaO��/Ta. We compare this system to a similar device stack based on titanium oxides to obtain insight into the solid-state thermodynamic and kinetic factors that influence endurance in metal-oxide memristors.
College Of Engineering Senior Design Competition Fall 2010, University Of Nevada, Las Vegas
College Of Engineering Senior Design Competition Fall 2010, University Of Nevada, Las Vegas
Fred and Harriet Cox Senior Design Competition Projects
Part of every UNLV engineering student’s academic experience, the senior design project stimulates engineering innovation and entrepreneurship. Each student in their senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. A capstone to the student’s educational career, the senior design project encourages the student to use everything learned in the engineering program to create a practical, real world solution to an engineering challenge.
The senior design competition helps to focus the senior students in increasing the quality and potential for commercial application for their design projects. Judges from local industry evaluate the projects …
Using Knowledge Building To Support Deep Learning, Collaboration And Innovation In Engineering Education, Glenn W. Ellis, Alan N. Rudnitsky, Mary A. Moriarty
Using Knowledge Building To Support Deep Learning, Collaboration And Innovation In Engineering Education, Glenn W. Ellis, Alan N. Rudnitsky, Mary A. Moriarty
Engineering: Faculty Publications
Knowledge building is a potentially transformative approach to engineering education. In knowledge building students participate in an interactive discourse in which they work together to broaden ideas, reform problems and share knowledge - the result being a deeper level of understanding and the collaborative production of new knowledge. In 2009 we conducted a knowledge building pilot study in the Picker Engineering Program at Smith College. In this study students worked together to formulate a question about the potential for a conscious machine and then engaged in an intensive knowledge building discourse. Assessment data showing the effectiveness of the approach and …
Novel Vascular Grafts Based On Polyphenol-Stabilized Acellular Tissue Scaffolds, Ting-Hsien Chuang
Novel Vascular Grafts Based On Polyphenol-Stabilized Acellular Tissue Scaffolds, Ting-Hsien Chuang
All Dissertations
The Cardiovascular diseases (CVDs) continue to be the leading cause of morbidity and mortality worldwide. The most common form of CVDs is occlusion of blood flow thus limiting blood supply to specific tissues or organs. Atherosclerosis is a leading cause of coronary heart disease and stroke, which were responsible for more than 25% of deaths in 2004.
The demand for vascular graft is huge. In United States alone, approximately 500,000 coronary artery bypass graft surgeries are performed annually. Synthetic polymers such as Dacron and ePTFE have been successfully applied in large diameter blood vessel prosthesis; however, for small diameter (inner …
Effect Of Impurities On Performance Of Proton Exchange Membrane Fuel Cell Components, Kitiya Hongsirikarn
Effect Of Impurities On Performance Of Proton Exchange Membrane Fuel Cell Components, Kitiya Hongsirikarn
All Dissertations
It is believed that proton–exchange membrane fuel cells (PEMFCs) are going to be exploited as power generation devices for stationary, automotive, and portable applications in the near future because of their high performance and environmental friendliness. Up to the present, wide spread utilization of PEMFCs is not viable because of their cost and durability in the presence of fuel and oxidant stream impurities. These impurities include NH3, hydrocarbons, CO, CO2, halogenated compounds, cations, etc. The objective of this research was to investigate the effect of these harmful contaminants containing in the H2 fuel stream on …
The Effectiveness Of Silica Sand In Semi-Aerobic Stabilized Landfill Leachate Treatment, Ezlina Othman, Mohd Suffian Yusoff, Hamidi Abdul Aziz, Mohd Nordin Adlan, Mohammed J.K. Bashir, Yung Tse Hung
The Effectiveness Of Silica Sand In Semi-Aerobic Stabilized Landfill Leachate Treatment, Ezlina Othman, Mohd Suffian Yusoff, Hamidi Abdul Aziz, Mohd Nordin Adlan, Mohammed J.K. Bashir, Yung Tse Hung
Civil and Environmental Engineering Faculty Publications
© 2010 by the authors. This study examines the suitability of natural silica sand as a low-cost adsorbent for the removal of ammoniacal nitrogen and heavy metals, particularly iron and zinc, from semi-aerobic stabilized landfill leachate. Leachate samples were collected from the Pulau Burung landfill site (PBLS) in Penang, Malaysia. The above-mentioned contaminants are highlighted in this study because of their unsafe concentrations at PBLS. The effects of shaking time, settling time, and silica sand dosage on the study parameter removal efficiencies were investigated to predict the performance of the process. The adsorptions of ammoniacal nitrogen, iron, and zinc were …
Combining Mobile Technologies For Accurate, Open Source, Privacy Sensitive, Zero Cost, Location Determination, Seamus Rooney
Combining Mobile Technologies For Accurate, Open Source, Privacy Sensitive, Zero Cost, Location Determination, Seamus Rooney
Doctoral
Determining the location of an object or individual using a mobile device (e.g. cell phone) is an important aspect of modern information gathering. Various solutions have been proposed which all have their strengths and weaknesses. To date, no solution has been devised for a mobile device that will work effectively in multiple environments and without assistance from network-provider connections1. To address this, it is argued that the current state of the art can be advanced using a hybrid approach that combines a number of sensor technologies to provide a more reliable, and accurate mobile location determination that functions in multiple …