Radiation Induced Fault Detection, Diagnosis, and Characterization of Field Programmable Gate Arrays

The development of Field Programmable Gate Arrays (FPGAs) has been a great achievement in the world of micro-electronics. One of these devices can be programmed to do just about anything, and replace the need for thousands of individual specialized devices. Despite their great versatility, FPGAs are still extremely vulnerable to radiation from cosmic waves in space and from adversaries on the ground. Extensive research has been conducted to examine how radiation disrupts different types of FPGAs. The results show, unfortunately, that the newer FPGAs with smaller technology are even more susceptible to radiation damage than the older ones. This research incorporates and enhances current methods of radiation detection. The design consists of 15 sensor networks that each have 29 sensors. The sensors are simple inverters, but they have the ability to detect flipped bits and delay errors caused by radiation. Analyzers process the outputs of each sensor to determine if the value agrees with what is expected. This information is fed to a reporter that creates an easy-to-read output that describes which network the fault is in, what type of fault is present, how many are in the network, how long they have been there, and the percent slowdown if it is a delay issue. Each network reports any fault data, to the computer screen in real time. This design does need some improvement, but once those improvements are made and tested, this system can be incorporated with FPGA reconfiguration methods that automatically place application logic away from failing errors of the FPGA. This system has great potential to become a great too in fault mitigation

Effects of Task Language on English and Spanish Bilinguals\u27 Speech Perception Study

Variability across speakers and across languages makes speech perception a surprisingly complex task, as there are not exact numerical values you can memorize to determine what speech sound someone is intending at any given time without understanding the speaker context. For example, one acoustic cue is voice onset time (VOT), a measure for the length of different stop consonants. In English, voiced stop consonants like /b/ have short VOTs (around 0ms) and voiceless stop consonants like /p/ have longer VOTs (around 40ms). In Spanish, the same sounds are shifted in VOT, such that /b/ is pre-voiced with a VOT around -40ms and /p/ has a VOT around 0ms. Thus an English voiced phoneme and a Spanish voiceless phoneme actually have identical VOTs. This is especially relevant for bilingual speakers, who need to know the rules for phoneme pronunciation in multiple languages. The specific goal of our research project was to investigate how bilingual English-Spanish speakers shift their perceived VOT boundary based on language context. Researcher interacted with participants in either all English or all Spanish, and then participants completed an experiment where they were asked what they heard for a variety of pairs of words/non-words that exist in English and/or Spanish (e.g., basta/pasta where both are words in Spanish but only pasta is a word in English). We hope the results of this project will give us more insight into how bilingual individuals switch between languages and how task-switching affects even their basic perception of sounds

Why are Some Engaged and Not Others? Explaining Environmental Engagement among Small Firms in Tourism

This paper examines the reasons for different levels of environmental engagement among small firms in tourism. Drawing on theories of motivation, notably Social Cognitive Theory, Motivation Systems Theory and Goal Orientation Theory, as well as the literature on environmental sensitivity, it proposes a novel conceptual framework that is subsequently used to inform an empirical study. The findings of the research suggest that varying levels of environmental engagement may be explained by differences in worldviews, self-efficacy beliefs, context beliefs and goal orientation. The paper concludes by considering the policy implications of the results. © 2011 John Wiley & Sons, Ltd

Conservation Genetics of the North American Box Turtle

This poster was presented at the National Collegiate Honors Council Conference in Boston, Massachusetts.https://scholarworks.uttyler.edu/student_posters/1006/thumbnail.jp

Twenty-Five Years of Population Fluctuations of Microtus Ochrogaster and M-Pennsylvanicus in Three Habitats in East-Central Illinois

Populations of 2 species of arvicoline rodents, the prairie vole (Microtus ochrogaster) and meadow vole (M. pennsylvanicus), were monitored monthly in alfalfa, bluegrass, and tallgrass prairie habitats in east-central Illinois from 1972 through 1997. Alfalfa provides very highquality preferred food and poor vegetative cover for both vole species, whereas bluegrass provides intermediate food and vegetative cover. Preferred food resources were very low, especially for M. ochrogaster, and vegetative cover was very dense in tallgrass prairie. Maximum and mean population densities of M. ochrogaster were highest in alfalfa, intermediate in bluegrass, and lowest in tallgrass prairie. Populations of M. ochrogaster displayed synchronous 3- to 4-year multiannual cycles in all 3 habitats. Cycles were most pronounced in alfalfa, less pronounced in bluegrass, and barely discernible in tallgrass prairie. Food availability seems more important than vegetative cover for the success of M. ochrogaster. Densities of M. pennsylvanicus generally were very low in bluegrass and alfalfa habitats, both of which contained an abundance of preferred food plants. When M. pennsylvanicus was present in abundance in these 2 habitats, populations displayed annual or erratic fluctuations. Densities of M. pennsylvanicus were much higher in tallgrass prairie than in the other 2 habitats. Although vegetative cover seems more important than food availability for the success of M. pennsylvanicus, no evidence existed for population cycles in tallgrass prairie. We found no synchrony among population fluctuations of the 2 species of voles in the 3 habitats

Sustainability motivations and practices in small tourism enterprises in European protected areas

A survey of around 900 tourism enterprises in 57 European protected areas shows that small firms are more involved in taking responsibility for being sustainable than previously expected, including eco-savings related operational practices but also reporting a wide range of social and economic responsibility actions. Two-step cluster analysis was used to group the firms in three groups based on their motivations to be sustainable. Business driven firms implement primarily eco-savings activities and are commercially oriented. Legitimization driven firms respond to perceived stakeholder pressure and report a broad spectrum of activities. Lifestyle and value driven firms report the greatest number of environmental, social and economic activities. No profile has a higher business performance than average. The study has implications for policy programmes promoting sustainability behaviour change based primarily on a business case argument

Scale of hospitality firms and local economic development: evidence from Crete

The hospitality industry generates benefits for many host communities including employment generation and foreign exchange earnings. However, the hospitality industry often leads to external dependency contributing to a loss of local control over resources, migrant workforce and leakages outside the local economy, seriously reducing industry's potential for generating net financial advantages and growth for the local economy. Despite the variation of size of hospitality firms, there is still limited research on how well different size hospitality firms contribute to local economic development, something which this paper addresses, taking as a case the island of Crete. The findings suggest that the smaller the size of hospitality firm the larger the benefits to the local economy

Progress and prospects for event tourism research

This paper examines event tourism as a field of study and area of professional practice updating the previous review article published in 2008. In this substantially extended review, a deeper analysis of the field’s evolution and development is presented, charting the growth of the literature, focusing both chronologically and thematically. A framework for understanding and creating knowledge about events and tourism is presented, forming the basis which signposts established research themes and concepts and outlines future directions for research. In addition, the review article focuses on constraining and propelling forces, ontological advances, contributions from key journals, and emerging themes and issues. It also presents a roadmap for research activity in event tourism