Symbolic algorithms for the Painlevé test, special solutions, and recursion operators for nonlinear PDEs

This paper discusses the algorithms and implementations of three MATHEMATICA packages for the study of integrability and the computation of closed-form solutions of nonlinear polynomial PDEs. The first package, PainleveTest.m, symbolically performs the Painlevé integrability test. The second package, PDESpecialSolutions.m, computes exact solutions expressible in hyperbolic or elliptic functions. The third package, PDERecursionOperator.m, generates and tests recursion operators

Symbolic Computation of Polynomial Conserved Densities, Generalized Symmetries, and Recursion Operators for Nonlinear Differential-Difference Equations

Algorithms for the symbolic computation of polynomial conserved densities, fluxes, generalized symmetries, and recursion operators for systems of nonlinear differential-difference equations are presented. In the algorithms we use discrete versions of the Fréchet and variational derivatives, as well as discrete Euler and homotopy operators. The algorithms are illustrated for prototypical nonlinear polynomial lattices, including the Kac-van Moerbeke (Volterra) and Toda lattices. Results are shown for the modified Volterra and Ablowitz-Ladik lattices

Vorticism in aeronautics

Since the war there has been a considerable advance in knowledge on the subject of the airfoil and its behavior. The theory is now sufficiently advanced to make it possible to predict and to calculate certain results which previously could only be attained by direct experiment. The vortex theory receives special attention

Artificial intelligence techniques for flood risk management in urban environments

Open Access journalCopyright © 2013 The Authors. Published by Elsevier Ltd.12th International Conference on Computing and Control for the Water Industry, CCWI2013Urban flooding is estimated to cause £270 million pounds worth of damage each year in England and Wales alone. There has, therefore, been a clear need to develop improved methods of identifying intervention strategies to reduce flood risk in urban environments. This paper describes ground-work performed towards evaluating the relative suitability of several algorithms applied to multi-objective optimisation of flood risk intervention strategies in an urban drainage network. An effective methodology is described for reducing an array of return period/duration rainfall files to a minimum, and it is described how this methodology makes possible comparisons of optimisation algorithms. This work has been undertaken as part of a STREAM-IDC EngD project which is a collaborative effort between the University of Exeter, and HR Wallingford

Handheld spectroradiometer system, computer-readable media, and calibration methods

Non-transitory computer-readable media, spectroradiometer systems, and methods for calibrating a spectroradiometer. In one embodiment, a non-transitory computer-readable medium includes instructions that, when executed by an electronic processor, cause the electronic processor to perform a set of operations. The set of operations includes receiving spectral data regarding an object-of-interest that is captured by a handheld spectroradiometer, detecting a characteristic of the object-of-interest by performing a spectral analysis on the spectral data that is received, and controlling a display to display the characteristic of the object-of-interest.https://digitalcommons.mtu.edu/patents/1154/thumbnail.jp

Chrysler/UMTRI wind-steer vehicle simulation - reference manual, version 1.4 (volume II).

Notes: Report covers the period June 1986 - March 1990Chrysler Corporation, Highland Park, Mich.http://deepblue.lib.umich.edu/bitstream/2027.42/882/2/79669.0001.001.pd

Assessing the Educational Environment of a Flipped Physical Therapy Course: Utilization of the Dundee Ready Education Environment Measure (DREEM)

Purpose: Using valid and reliable measures to assess curricula within health professions programs has gained significant attention in recent years. The educational environment is considered a key domain for student success. The primary aim of this study was to measure the educational environment following the addition of a flipped classroom model within a physical therapy course as measured by the Dundee Ready Education Environment Measure. Methods: A first year doctorate of physical therapy course, “Physical Agents”, was redesigned to include a flipped classroom model, incorporating 24 videos that students reviewed independently, prior to hands-on laboratory learning. Following the conclusion of the course, students (n=57) completed the Dundee Ready Education Environment Measure, a valid and reliable survey designed to measure the educational environment within health profession programs. The Dundee Ready Education Environment Measure contains 50 items, rated from 0 to 4 (5-point Likert scale, “0” strongly disagree to “4” strongly agree), assessing five domains: students’ perceptions of learning; perceptions of teachers; academic self-perception; perceptions of atmosphere; and social self-perception. Descriptive statistics included mean global score (out of 200, 151 to 200 being an excellent environment) mean domain scores, and mean item scores. Cumulative grade point average between students in the flipped classroom model (n=58) and those who previously received a traditional teaching model (n=59) for the course were also compared. Student’s t-test was utilized with significance accepted at p\u3c0.05. Results: The mean global score (168 ± 13.3), indicated that the flipped classroom model fostered an excellent educational environment. Additionally, all mean domain scores, including students’ perceptions of learning (41.3 ± 3.9), perceptions of teachers (39.2 ± 2.9), academic self-perception (25.1 ± 2.5) perception of atmosphere (40.1 ± 4.1) and social self-perception (22.1 ± 2.9) fell into the highest rank of each subscale. Individual item analysis demonstrated 26 items (52%) were identified as especially strong areas, five items (10%) were identified as areas that could be improved, and no individual items were identified as requiring particular concern or immediate attention. Further, no significant differences were seen in cumulative course grade point average between the flipped classroom model (3.74 ± 0.44) and the traditional teaching model (3.71 ± 0.46). Conclusions: The flipped classroom model, utilizing an online learning environment, fostered an excellent educational environment for the physical therapy Physical Agents class. No difference in course grade point average between the flipped classroom model and previous traditional teaching model was seen. Further investigations examining performance on didactic and psychomotor activities within the flipped classroom model are recommended

An enhanced simulation capability for studying the braking, steering, and ride of commercial vehicles. Final report

Notes: Report covers the period July 1985 - June 1986Motor Vehicle Manufacturers Association, Detroit, Mich.http://deepblue.lib.umich.edu/bitstream/2027.42/60/2/74162.0001.001.pd

THE RELATIONSHIP BETWEEN SUPPRESSION OF CRAVING AND MOTIVATION TO SMOKE

Experimental research on suppression shows a rebound effect in which the suppressed content is expressed more following an attempt to suppress it than if suppression was never attempted. Research also has demonstrated an increased accessibility of the suppressed content during a suppression attempt. While prior work has explicitly instructed participants to suppress their responses to stimuli, the present study sought to examine suppression as it naturally occurs in response to smoking cues. This study used the Facial Action Coding System (FACS) to examine spontaneously occurring facial responses thought to relate to emotion suppression. Specifically this study is the first to aim to link spontaneous attempts to suppress cigarette craving in the laboratory to increased accessibility of cigarette craving during a suppression attempt and an increased rebound in motivation to smoke immediately following it. Nicotine deprived, heavy smokers (n=66) were exposed to a robust smoking cue exposure manipulation while their facial responses were videotaped. They also reported their urge to smoke and completed a secondary response time task. Following cue exposure, participants completed a behavioral choice task found previously to index smoking motivation. Results showed that participants evincing facial expressions linked to suppression valued smoking more than did those not displaying these expressions, suggesting the a suppression-related rebound in motivation to smoke following the craving induction. Those expressing suppression did not differ from the remaining participants in their reactions during cue exposure

Guidelines for conducting and calibrating road roughness measurements

http://deepblue.lib.umich.edu/bitstream/2027.42/3133/2/72764.pd