Free vibrations of thin isotropic oblate spheroidal shells

Free vibrations of thin isotropic oblate spheroidal shell

A computer program for the use of sensitivity analysis in display evaluation

A description is provided of the Display Evaluation computer program, some results of this program and comparison of these results with a simple experiment. A detailed description of the experiment and data analysis are also included

Rule-based air combat simulation

An improved version of the Adaptive Maneuvering Logic (AML) program for air-combat maneuvering is discussed. The modifications and improvements incorporated into the AML program are documented

Facilitators and Barriers to Incorporating Students with Disabilities in the General Education Classroom at the Secondary Level: A Study of Teacher Perceptions.

The history of incorporating students with disabilities in the general education classroom is driven by parents and advocates of children with disabilities. The push has been to educate all children in the least restrictive environment (LRE), changing the role of general education teacher from a subject matter specialist to include the responsibility of educating students with a wide range of special needs. While most agree that educating children with disabilities in the general education classroom alongside their non-disabled peers is better than excluding them from academic and social opportunities, general educators have been a noticeably absent voice in regards to these changes. The purpose of this qualitative study was to give general educators the opportunity to provide this missing voice. In order to collect data for this phenomenological study, open-ended interviews were conducted with 22 teachers in Northeast Tennessee. The subjects were purposefully sampled to gain maximum variation in terms of school setting, years of experience, and subject matter taught. Using constant comparative analysis, incidents were classified into teacher perceptions regarding incorporating students with disabilities in their classroom, the efficacy of this practice, and facilitators and barriers to this practice. Within each of these categories, sub-categories emerged. The data collected in this study supported the notion that general educators were excluded from the decision making process in regards to special education, and that they viewed the rules and regulations as mandates handed to them by superiors as opposed to joint decisions made in the best interest of their students. Respondents also voiced their opinions regarding the efficacy of incorporating students with disabilities in the general education classroom, as well as facilitators and barriers to success with the practice. This study is important to parents, teachers, and administrators who are interested in a better understanding of the phenomenon of incorporating students with disabilities in the general education classroom from a general education teacher\u27s perspective. It also serves to provide the missing voice of the general educator in regards to this topic

Use of sensitivity analysis to predict pilot performance as a function of different displays

A technique for objectively evaluating different displays by sensitivity analysis is described. First, the mathematical model used to analyze static displays is developed. The technique is based on formulating functional relationships between the state variables and the variables observable in the display. The matrix of the partial derivatives of the display variables with respect to the state variables, together with the observer's acuity function, is used to calculate expected errors in the state vector estimation. The technique is expanded by the use of Kalman filtering to process a time series of observation vectors. This provides a tool for analyzing displays of dynamic processes by means of a dynamic display evaluation computer program. Results are reported using this program to simulate an Instrument Landing System approach

The mechanical and material properties of elderly human articular cartilage subject to impact and slow loading

Copyright © 2013 IPEM. Published by Elsevier Ltd. All rights reserved.Peer reviewedPostprin

Comparison of pre-emptive and reactive strategies to control an incursion of bluetongue virus serotype 1 to Great Britain by vaccination.

Bluetongue (BT) is a disease of ruminants caused by bluetongue virus (BTV), which is spread between its hosts by Culicoides midges. Vaccination is the most effective way to protect susceptible animals against BTV and was used reactively to control the recent northern European outbreak. To assess the consequences of using vaccination pre-emptively we used a stochastic, spatially explicit model to compare reactive and pre-emptive vaccination strategies against an incursion of BTV serotype 1 (BTV-1) into Great Britain. Both pre-emptive and reactive vaccination significantly reduced the number of affected farms and limited host morbidity and mortality. In addition, vaccinating prior to the introduction of disease reduced the probability of an outbreak occurring. Of the strategies simulated, widespread reactive vaccination resulted in the lowest levels of morbidity. The predicted effects of vaccination were found to be sensitive to vaccine efficacy but not to the choice of transmission kernel

Crocodiles and grey nomads: a deadly combination?

Increasing numbers of retirees seek individual, extended, unstructured activities in remote, non-commercial locations. Travel is predominantly by self-drive 4WD vehicle towing a caravan/campervan. These ‘grey nomads’ often prefer remote bush camping sites/caravan parks to commercial resorts. The tropics – a popular destination – are inhabited by Australia’s only large semi-terrestrial carnivore, the estuarine crocodile Crocodylus porosus. Conservation programmes of recent decades have resulted in a substantial increase in numbers. With naive grey nomads increasingly encroaching on crocodile territory, attacks are expected to increase. Review of conservation programmes to incorporate awareness education targeting grey nomads is therefore required

Annual Survey of Virginia Law: Property Law

This article reviews selected judicial decisions and legislation affecting real property law in Virginia during the past year. Part I discusses some of the more significant cases decided by the Supreme Court of Virginia. Part II discusses some of this year\u27s most significant legislation enacted by the Virginia General Assembly