Plutonium Worlds. Fast Breeders, Systems Analysis And Computer Simulation In The Age Of Hypotheticality, 2014 University of Massachusetts - Amherst
Plutonium Worlds. Fast Breeders, Systems Analysis And Computer Simulation In The Age Of Hypotheticality, Sebastian Vehlken
This article examines the media history of one of the hallmark civil nuclear energy programs in Western Germany – the development of Liquid Metal Fast Breeder Reactor (LMFBR) technology. Promoted as a kind of perpetuum mobile of the Atomic Age, the "German Manhattan Project" not only imported big science thinking. In its context, nuclear technology was also put forth as an avantgarde of scientific inquiry, dealing with the most complex and 'critical' technological endeavors. In the face of the risks of nuclear technology, German physicist Wolf Häfele thus announced a novel epistemology of
"hypotheticality". In a context where traditional experimental engineering ...
Comparison Of Optimization Techniques In Large Scale Transportation Problems, 2014 Minnesota State University, Mankato
Comparison Of Optimization Techniques In Large Scale Transportation Problems, Tapojit Kumar
Journal of Undergraduate Research at Minnesota State University, Mankato
The Transportation Problem is a classic Operations Research problem where the objective is to determine the schedule for transporting goods from source to destination in a way that minimizes the shipping cost while satisfying supply and demand constraints. Although it can be solved as a Linear Programming problem, other methods exist. Linear Programming makes use of the Simplex Method, an algorithm invented to solve a linear program by progressing from one extreme point of the feasible polyhedron to an adjacent one. The algorithm contains tactics like pricing and pivoting. For a Transportation Problem, a simplified version of the regular Simplex ...
Automated Image Interpretation For Science Autonomy In Robotic Planetary Exploration, 2014 Western University
Automated Image Interpretation For Science Autonomy In Robotic Planetary Exploration, Raymond Francis
University of Western Ontario - Electronic Thesis and Dissertation Repository
Advances in the capabilities of robotic planetary exploration missions have increased the wealth of scientific data they produce, presenting challenges for mission science and operations imposed by the limits of interplanetary radio communications. These data budget pressures can be relieved by increased robotic autonomy, both for onboard operations tasks and for decision- making in response to science data.
This thesis presents new techniques in automated image interpretation for natural scenes of relevance to planetary science and exploration, and elaborates autonomy scenarios under which they could be used to extend the reach and performance of exploration missions on planetary surfaces.
Local Buckling Behavior Of Round Steel Tubes Subjected To Compressive Loads, 2014 California Polytechnic State University
Local Buckling Behavior Of Round Steel Tubes Subjected To Compressive Loads, Joseph Moore, Ben Fell
STEM Teacher and Researcher (STAR) Program Posters
This project will investigate the local buckling induced fracture behavior of round steel tubes subjected to axial compressive loads, representative of observed failures in buried pipelines during seismic events. Nine initial tests will be conducted across three lengths of round steel tube: 8”, 12”, and 20”. Another twelve tests will be conducted on the lengths of 12” and 20” to test varying initial compressive force upon the round steel tubes. Three D/t ratios will be considered for each length of round steel tube: 52.6, 78.9, and 121.2. To verify the material properties of the test specimens ...
Electronic Supplement: Value Focused Thinking For Community-Based Organizations: Objectives And Acceptance In Local Development, 2014 University of Massachusetts Boston
Electronic Supplement: Value Focused Thinking For Community-Based Organizations: Objectives And Acceptance In Local Development, Jeffrey Keisler, David A. Turcotte, Rachel B. Drew, Michael P. Johnson Jr.
Michael P. Johnson
This is an electronic supplement to the manuscript "Value Focused Thinking for Community-Based Organizations: Objectives and Acceptance in Local Development", to appear in European Journal of Decision Processes.
Potential To Increase Indigenous Biodiesel Production To Help Meet 2020 Targets – An Eu Perspective With A Focus On Ireland, Fionnuala Murphy
The biofuels penetration rate target in Ireland for 2013 is 6% by volume. In 2012 the fuel blend reached 3%, with approximately 70 million litres of biodiesel and 56 million litres of ethanol blended with diesel and gasoline respectively. For January and February 2013, the blend rate had only reached 2.7%. The target of 10% by 2020 remains which equates to approximately 420 million litres. Achieving the biofuels target would require 345 ktoe by 2020 (14,400 TJ). Utilising the indigenous biofuels outlined in this paper leaves a shortfall of approximately 12,000 TJ or 350 million litres (achieving ...
Assessing Survivability Of The Beijing Subway System, 2014 University of Wisconsin Milwaukee
Assessing Survivability Of The Beijing Subway System, Yan Li, Hyun Kim
International Journal of Geospatial and Environmental Research
The Beijing subway system, the third largest in the world, serves more than ten million passengers a day. As Beijing is the capital city of China and thus a booming urban center, its subway system has experienced rapid evolution from a local single line system to a complicated network. Due to its constantly increasing complexity, the system is both a critical asset for a local transit artery and a bridge between intercity transportation modes, increasing the issue of network survivability in the face of potential outages of network components. In this study, we provide a connectivity-based survivability measure with which ...
Assessing Customer Service In Airports – Models From The Uae, 2014 Embry-Riddle Aeronautical University
Assessing Customer Service In Airports – Models From The Uae, Aman Gupta, Mohammed Arif, Phillip A. Richardson
International Journal of Aviation, Aeronautics, and Aerospace
Customer service at airports has become a key priority for airport operators given the high degree of competitions. This paper uses an airport customer service model to analyze three examples from the United Arab Emirates (UAE). Passenger interviews, statistical information, customer feedback and other forms of information have been utilized to learn more about the customer view on the quality of service offered at these three airports. Detailed qualitative analysis of these case studies has highlighted some key issues in the area of customer service and identifies some opportunities for improvement.
A Set Union Based Formulation For Course Scheduling And Timetabling, 2014 California Polytechnic State University
A Set Union Based Formulation For Course Scheduling And Timetabling, Jesse Paul Bukenberger
Master's Theses and Project Reports
The Course Timetabling Problem is a widely studied optimization problem where a number of sections are scheduled in concert with the assignment of students to sections in order to maximize the desirability of the resulting schedule for all stakeholders. This problem is commonly solved as a linear program with variables for each student or group of students with identical schedules. In this paper we explore an alternative formulation that aggregates binary student variables into integer variables denoting the number of students enrolled in a course. Our solution method assumes decomposition of the general schedule into time blocks, and applies a ...
Analysis Of Environmentally Friendly Marking Ink For Military Equipment And Electronics, 2014 California Polytechnic State University
Analysis Of Environmentally Friendly Marking Ink For Military Equipment And Electronics, Liang Li
Master's Theses and Project Reports
Recent advancements in corrosion-resistance coating technology has reduce the use of environmentally harmful compounds such as Hexavalent Chromium by replacing Hexavalent Chromium in primers and topcoat. However, marking inks were neglected in the process. Products such as Enthone 50 series are still widely used, which contain compounds such as lead, hexavalent chromium, bisphenol A (BPA), Cadmium Sulfide, and more. Excluding catalyst compositions in Enthone, the chemicals in the ink alone contained three reproductive toxicant and numerous carcinogens. Therefore, it was essential to search and validate the performance of potential marking ink that would meet the standards in military applications.
Systems Science And Health: Using Analytical Approaches To Evaluate Healthcare Policy Decisions, 2014 University of Massachusetts Medical School
Systems Science And Health: Using Analytical Approaches To Evaluate Healthcare Policy Decisions, Isa Bar-On, Allison B. Rosen, Tze Chiam, Renata Konrad, Oleg Pavlov, Khalid Saeed, Shamsnaz Virani
UMass Center for Clinical and Translational Science Research Retreat
This collection of presentations is from the mini-symposium entitled "Systems Science and Health: Using Analytical Approaches to Evaluate Healthcare Policy Decisions." The focus of this symposium is on systems science applications to health research. Systems science is a collection of analytical computer simulation techniques which are used to evaluate optimize and improve healthcare delivery processes. These techniques account for the complexity of the healthcare system and healthcare processes by modeling nonlinear relationships between variables, the feedback effects, delays and soft variables. The analysis stresses heterogeneity of agents, resistance to change, potential unintended consequences, and behavioral emergence in complex systems. Such ...
The Feasibility Of Citywide Public Drt: Door-To-Door Bus Service In Tacoma, 2014 University of Puget Sound
The Feasibility Of Citywide Public Drt: Door-To-Door Bus Service In Tacoma, Nathan Pastor
Honors Program Theses
This paper examines the feasibility of operating Demand Responsive Transit (DRT) as the primary mode of mass transit in Tacoma, WA. With the promise of door-to-door service anywhere within a region, DRT has the potential to attract new discretionary mass transit riders while serving demand more efficiently than fixed-route systems. We present an algorithm for generating realistic datasets of riders based on employment and demographic data at the census tract level, which are fed through a simulated dynamic DRT system in Tacoma (TacDRT). The TacDRT service is considered feasible if it can serve the same volume of demand that the ...
Leveraging High Resolution Signalized Intersection Data To Characterize Discharge Headway Distributions And Saturation Flow Rate Reliability, Stephen M. Remias, Alexander M. Hainen, Gannon Grimmer, Alexander D. Davis, Christopher M. Day, Thomas M. Brennan Jr, James R. Sturdevant, Darcy M. Bullock
JTRP Other Publications and Reports
As highway systems become more congested, it becomes increasingly important to understand the reliability with which we can estimate important performance measures such as volume to capacity ratios, particularly as we move toward leveraging field infrastructure to obtain real-time performance measures. In 1947, Greenshields wrote a paper that characterized “green time consumed” by “car-in-line-number” that ultimately was called headway. Average headway is one of principles used by the highway capacity manual to estimate saturation flow rate at signalized intersections. However, the current analytical techniques calculate a deterministic value for saturation flow rate that does not consider the stochastic variation of ...
Active Sensing For Dynamic, Non-Holonomic, Robust Visual Servoing, 2014 University of Pennsylvania
Active Sensing For Dynamic, Non-Holonomic, Robust Visual Servoing, Avik De, Karl S. Bayer, Daniel E. Koditschek
Departmental Papers (ESE)
We consider the problem of visually servoing a legged vehicle with unicycle-like nonholonomic constraints subject to second-order fore-aft dynamics in its horizontal plane. We target applications to rugged environments characterized by complex terrain likely to perturb significantly the robot’s nominal dynamics. At the same time, it is crucial that the camera avoid “obstacle” poses where absolute localization would be compromised by even partial loss of landmark visibility. Hence, we seek a controller whose robustness against disturbances and obstacle avoidance capabilities can be assured by a strict global Lyapunov function. Since the nonholonomic constraints preclude smooth point stabilizability we introduce ...
Starch-Pectin Matrices For Encapsulation Of Ascorbic Acid, 2014 University of Nebraska - Lincoln
Starch-Pectin Matrices For Encapsulation Of Ascorbic Acid, Yiwei Liu
Dissertations & Theses in Food Science and Technology
Starch and pectin are two food-grade carbohydrates widely utilized in the food industry. Starch and pectin polymers have been investigated in encapsulating functional food ingredients and in pharmaceutical applications. Resistance to enzyme hydrolysis, differential solubilities, depending on the pH, and the ability to ‘protect’ unstable molecules are considered some of the beneficial properties of starch and pectin polymers, for encapsulation applications. Food ingredients could be delivered in a controlled manner to a specific target by encapsulating in micro-scale particles, i. e., microencapsulation. Two studies were conducted to investigate the ability of selected starch-pectin blends in microencapsulating ascorbic acid (vitamin C ...
Proportional Hazard Model Applications In Reliability, 2014 Northeastern University
Proportional Hazard Model Applications In Reliability, Alexandre Consul Mendes
Industrial Engineering Dissertations
This dissertation proposes two main methods as a modification of the semi-parametric Proportional Hazard Model (PHM) with innovative application for reliability testing. The first method developed uses a median of lifetime survival history for subjects with multiple occurrences to be modeled using the non-recurrent PHM method. The second method developed proposes censoring of influential observations, applying recurrent PHM theory. Both methods are validated using small electromechanical appliances with covariates identifying typical user performance as part of accelerated reliability testing.
The Median PHM method is developed to allow the treatment of time-dependent covariates and competing failure types, which is fairly often ...
Antiviral Resistance And Dynamic Treatment And Chemoprophylaxis Of Pandemic Influenza, 2014 University of South Florida
Antiviral Resistance And Dynamic Treatment And Chemoprophylaxis Of Pandemic Influenza, Sandro Paz
Graduate School Theses and Dissertations
Public health data show the tremendous economic and societal impact of pandemic influenza in the past. Currently, the welfare of society is threatened by the lack of planning to ensure an adequate response to a pandemic. This preparation is difficult because the characteristics of the virus that would cause the pandemic are unknown, but primarily because the response requires tools to support decision-making based on scientific methods. The response to the next pandemic influenza will likely include extensive use of antiviral drugs, which will create an unprecedented selective pressure for the emergence of antiviral resistant strains. Nevertheless, the literature has ...
Statistical And Prognostic Modeling Of Clinical Outcomes With Complex Physiologic Data, 2014 University of South Florida
Statistical And Prognostic Modeling Of Clinical Outcomes With Complex Physiologic Data, Monica A. Puertas
Graduate School Theses and Dissertations
Laboratory tests are a primary resource for diagnosing patient diseases. However, physicians often make decisions based on a single laboratory result and have a limited perspective of the role of commonly-measured parameters in enhancing the diagnostic process. By providing a dynamic patient profile, the diagnosis could be more accurate and timely, allowing physicians to anticipate changes in the recovery trajectory and intervene more effectively.
The assessment and monitoring of the circulatory system is essential for patients in intensive care units (ICU). One component of this system is the platelet count, which is used in assessing blood clotting. However, platelet counts ...
Developing A Pavement Management System Using Data Fusion Of Physical Features, 2014 Northeastern University
Developing A Pavement Management System Using Data Fusion Of Physical Features, Tarun Reddy Aleti
Civil Engineering Master's Theses
Pavement assessment is still plagued by the expensive and time-consuming distress data collection method. The VOTERS (Versatile Onboard Traffic Embedded Roaming Sensors) project has successfully transformed the way pavement inspections are performed, from mainly visual distresses identification to measurements of physical pavement condition features through the use of various sensing systems mounted on a vehicle. It allows network-wide determination and pavement condition ranking of our vast highway network. This thesis presents how these physical features can substitute for traditional distress assessment methods. Then these substitute features are used as the main inputs to a new kind of Pavement Management System ...
Investigating Present And Future Interactions Between Radio Frequency Identification, Additive Manufacturing And Supply Chain Management, 2014 California Polytechnic State University
Investigating Present And Future Interactions Between Radio Frequency Identification, Additive Manufacturing And Supply Chain Management, Michael Nobuhiro Ochi
Master's Theses and Project Reports
A screening experiment was paired with research observing the past, present and futures of additive manufacturing (a.k.a. rapid prototyping, 3D printing), radio frequency identification, and supply chain management. The experiment tested different properties of objects created with a desktop fused deposition modelling printer to observe if any single factors or interactions affected the read range of embedded passive UHF RFID inlay. The combination of material and infill percentage had a statistically significant effect on read range, however the analysis is weak since the data could not justify the normality assumption of ANOVA. Furthermore, the size of the effect ...