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Medium Access Control(Mac) Layer Design And Data Query Processing For Wireless Sensor Networks, Qingchun Ren Sep 2007

Medium Access Control(Mac) Layer Design And Data Query Processing For Wireless Sensor Networks, Qingchun Ren

Electrical Engineering Dissertations - Archive

In this dissertation, there are four main aspects included: energy reservation on MAC layer, secure improvement for DoS attacks on MAC layer, query processing with uncertainty for sensor database systems, and throughput maximization on MAC layer for ultra wideband communication systems. In energy reservation, we proposed asynchronous MAC (A-MAC) protocol and asynchronous schedule-based MAC (ASMAC) protocol. A-MAC and ASMAC protocols are attractive due to their suitabilities for multihop networks and capabilities of removing accumulative clock-drifts without any network synchronization. Moreover, we build a traffic-strength- and network-density-based model to adjust essential algorithm parameters adaptively. In secure problem, we proposed a secure …

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1139-3159_Nir_Spex, Dagny L. Looper Sep 2007

1139-3159_Nir_Spex, Dagny L. Looper

Publications and Research

No abstract provided.

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Urban Particulate Matter Casues Er Stress And The Unfolded Protein Response In Human Lung Cells, T. L. Watterson, B. Hamilton, Randy S. Martin, R. A. Coulombe Jr. Sep 2007

Urban Particulate Matter Casues Er Stress And The Unfolded Protein Response In Human Lung Cells, T. L. Watterson, B. Hamilton, Randy S. Martin, R. A. Coulombe Jr.

Civil and Environmental Engineering Faculty Publications

Because of its presumed adverse health effects, particulate air pollution (PM) has received growing attention, but the cellular mechanisms by which PM exerts toxicity are not well elucidated. PM has been associated with early mortality from illnesses that share endoplasmic reticulum (ER) stress as a mechanism of pathogenesis. In this study, we examined whether PM would induce the unfolded protein response (UPR) which is a cellular response to ER stress. Coarse (PM10) and fine (PM2.5) PM was collected from a single location in Northern Utah's Cache Valley during atmospheric inversions occurring in January 2002 and January 2003. Extracts of PM …

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Effects Of Pm2.5 Collected From Cache Valley, Ut On Genes Associated With The Inflammatory Response In Human Lung Cells, T L. Watterson, J. Sorensen, Randy S. Martin, R. A. Coulombe Jr. Sep 2007

Effects Of Pm2.5 Collected From Cache Valley, Ut On Genes Associated With The Inflammatory Response In Human Lung Cells, T L. Watterson, J. Sorensen, Randy S. Martin, R. A. Coulombe Jr.

Civil and Environmental Engineering Faculty Publications

In January 2004, the normally picturesque Cache Valley in northern Utah made national headlines with the highest PM2.5 levels in the nation. Epidemiological studies linked exposure to particulate air pollution in other locations with stroke and Alzheimer's disease and to early mortality from all causes, cancer, and cardiopulmonary diseases. To determine potential effects of these particles on human health, human bronchial epithelial cells (BEAS-2B) were cultured with PM2.5collected from various locations in the Cache Valley. These particles were slightly cytotoxic, but more potent than NH4NO3, the major chemical component of Cache Valley PM2.5. Gene expression analysis of PM2.5-exposed cells was …

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Inheritance Of 'Domestication' Traits In Bambara Groundnut (Vigna Subterranea (L.) Verdc.), Shravani Basu, Sean Mayes, Michael Davey, Jeremy A. Roberts, Sayed N. Azam-Ali, Richard Mithen, Remy S. Pasquet Sep 2007

Inheritance Of 'Domestication' Traits In Bambara Groundnut (Vigna Subterranea (L.) Verdc.), Shravani Basu, Sean Mayes, Michael Davey, Jeremy A. Roberts, Sayed N. Azam-Ali, Richard Mithen, Remy S. Pasquet

All Peer-Reviewed Publications

Controlled crosses in bambara groundnut were attempted between a range of thirty-six bambara groundnut landraces (thirty domesticated (V. subterranea var. subterranea) and six wild (V. subterranea var. spontanea)). Ten F1 seed were produced. Of these, eight germinated producing F2 populations. On seed set, four populations could be unambiguously confirmed as true crosses by F3 seed coat colour. A single F2 population, derived from a domesticated landrace from Botswana (DipC; female parent) crossed with a wild accession collected in Cameroon (VSSP11; male parent) was used to study a range of agronomic and domestication traits. These included; days to emergence, days to …

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A Life In Context: Finding Form In Lewis T. May, Natalie A. Stackable Aug 2007

A Life In Context: Finding Form In Lewis T. May, Natalie A. Stackable

Landscape Architecture Masters & Design Theses - Archive

This thesis examines the life and career of Lewis T. May (1946 -), FASLA. During his three decades of practice, Mr. May has made exceptional contributions in landscape architecture as a practitioner, author, and academic, both domestically and abroad. He is the recipient of over 100 awards for his projects. A qualitative methodology is used to understand his contributions in a historical and personal context. His ability to communicate effectively, both graphically and verbally, is one reason for his success. Consequently, this thesis creates a framework for understanding his process in the field of landscape architecture. Open-ended interviews and participant …

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Finding Common Ground: Community Garden As Connector Between Culture, Nature, And The Individual, Valerie Dawn Warner Aug 2007

Finding Common Ground: Community Garden As Connector Between Culture, Nature, And The Individual, Valerie Dawn Warner

Landscape Architecture Masters & Design Theses - Archive

In the vacant spaces between buildings, in the corners of school yards, in open fields - wherever community gardens are deliberately placed - the space between culture and nature grows smaller. Closing this gap can come about on the common ground created in a collaborative spirit: the community changes the space, and then the space ultimately changes the community. This is the connective power of the humble community garden. This study finds that in urban environments, a community garden can be the link between individuals and their community, and between people and nature, imparting health of body and mind, feelings …

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Empirical Investigation Of The Relationship Of Privacy, Security And Trust With Behavioral Intention To Transact In E-Commerce, Anil Gurung Aug 2007

Empirical Investigation Of The Relationship Of Privacy, Security And Trust With Behavioral Intention To Transact In E-Commerce, Anil Gurung

Information Systems & Operations Management Dissertations - Archive

Privacy and security concerns of consumers have been touted as one of the hindrances in the growth of e-commerce. These concerns increase risk perception of consumers. Understanding the consequences of privacy and security concerns, and their relationship to risk perceptions may provide a solution. The relationship between privacy and security is investigated using the Theory of Planned Behavior. The model proposed in this study, investigates the relationship of trust, privacy and security concerns to the risk perception adoption of e-commerce. The results from a field study validate the model.

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A Typology Of Cluster Concentrations Based On Factor Conditions Of Production And Evolution Of Supply Chain Infrastructures, Pamela J. Zelbst Aug 2007

A Typology Of Cluster Concentrations Based On Factor Conditions Of Production And Evolution Of Supply Chain Infrastructures, Pamela J. Zelbst

Information Systems & Operations Management Dissertations - Archive

If the reader would imagine a 500 piece picture puzzle of which only one single piece is available for research, then it is obvious that any conclusions concerning the puzzle as a whole would at the very best be limited to what the researcher could extrapolate from that single piece of the puzzle. This study contends that to comprehend the puzzle it must be viewed as a whole picture, admittedly comprised of different pieces, but nonetheless only accurately understandable in regard to interaction and interconnectivities when viewed from a macro perspective. Accordingly, concentrations should be viewed from a holistic, macro …

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Towards A Systemic View Of Organizational Dynamic It Capability: An Empirical Assessment, Anurag Jain Aug 2007

Towards A Systemic View Of Organizational Dynamic It Capability: An Empirical Assessment, Anurag Jain

Information Systems & Operations Management Dissertations - Archive

In an increasingly complex world characterized by hyper-competition and turbulence, an organization's ability to sustain its competitive advantages depends not only on how it acquires its capabilities, but also on how it orchestrates the relationships among them. While the resource based view of the firm and the literature on dynamic capabilities have provided strategic insights to the successful deployment and expeditious management of scarce resources, there is very little research on dynamic capabilities from an IT perspective. In particular, there is no common understanding of what the phrase "dynamic IT capability" means or how it can be achieved. This study …

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Task Complexity And Effectiveness Of Pair Programming: An Experimental Study, Venugopal Balijepally Aug 2007

Task Complexity And Effectiveness Of Pair Programming: An Experimental Study, Venugopal Balijepally

Information Systems & Operations Management Dissertations - Archive

Extreme Programming, which is recently gaining popularity as an alternate software development methodology, involves two programmers working collaboratively to develop software. This study examined the efficacy of pair programming by comparing the effectiveness of collaborating pairs with those of programmers working individually. Student subjects participated in a controlled laboratory experiment. Two factors were manipulated in the experiment: programming task complexity (high vs. low) and programmers working individually vs. in pairs. The performance of programmer pairs was compared with those of the best performer and the second best performer from among nominal pairs. An important finding of the study is that …

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A Life In Context: Finding Form In Lewis T. May, Natalie A. Stackable Aug 2007

A Life In Context: Finding Form In Lewis T. May, Natalie A. Stackable

Landscape Architecture Masters & Design Theses - Archive

This thesis examines the life and career of Lewis T. May (1946 -), FASLA. During his three decades of practice, Mr. May has made exceptional contributions in landscape architecture as a practitioner, author, and academic, both domestically and abroad. He is the recipient of over 100 awards for his projects. A qualitative methodology is used to understand his contributions in a historical and personal context. His ability to communicate effectively, both graphically and verbally, is one reason for his success. Consequently, this thesis creates a framework for understanding his process in the field of landscape architecture. Open-ended interviews and participant …

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Capturing The Longitudinal Dynamics Of Customer-Supplier Relationships: An Empirical Examination Of The Roles Of It, Transaction Economics And Social Exchange, William Wayne Willette Aug 2007

Capturing The Longitudinal Dynamics Of Customer-Supplier Relationships: An Empirical Examination Of The Roles Of It, Transaction Economics And Social Exchange, William Wayne Willette

Information Systems & Operations Management Dissertations - Archive

The forms of cooperative business hold the promise of reduced costs, increased efficiencies, rapid market and environmental responses, expanded market opportunities, new resources, faster product developments, and the most coveted of all benefits--competitive advantage. These cooperative business forms are a rich matrix for the exploration and testing of a wide range of theories, such as Transaction Cost Economics, Social Exchange Theory, Resource Dependence Theory, and Relational Exchange Theory. This thesis presents a process view of how IT and trust affect transaction costs in a transaction dyad consisting of a small supplier and a large customer. It goes beyond functional relationships …

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Determinants Of Knowledge Sharing Behaviors: Developing And Testing An Integrated Theoretical Model, Anitha Chennamaneni Aug 2007

Determinants Of Knowledge Sharing Behaviors: Developing And Testing An Integrated Theoretical Model, Anitha Chennamaneni

Information Systems & Operations Management Dissertations - Archive

Knowledge sharing has been identified as the key enabler of knowledge management. To leverage knowledge resources and to support knowledge sharing, organizations are employing knowledge management systems. While knowledge management systems are important, practical implementations have found that technology alone cannot guarantee that knowledge will be shared. The objective of this research study was to examine factors that promote or discourage knowledge sharing behaviors of knowledge workers in the organizational context. Drawing from multiple streams of research including social psychology, organizational learning, knowledge management, information systems and so forth, this research developed an integrated theoretical model and unveiled three sets …

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An Empirical Examination Of The Influence Of Information Technology And Trust On Supply Chain Dyad Relationships And Performance, Anil Singh Aug 2007

An Empirical Examination Of The Influence Of Information Technology And Trust On Supply Chain Dyad Relationships And Performance, Anil Singh

Information Systems & Operations Management Dissertations - Archive

Reacting to increased competition, companies are adopting inter-organizational information systems (IOS) that share information across the supply chain partners. This sharing requires trust. To better understand the phenomenon of trust between partners, we develop an integrated model of trust in supply chains with theoretical underpinnings of transaction cost economics and environmental factors like Information Technology and Power. The framework also takes into consideration; the association between trust and final outcome measures such as performance and satisfaction through supply chain relationship. By assessing the interconnectedness of trust in inter-organizational information systems, with environmental factors, our research model will help researchers as …

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Implementation Of Enterprise Information Systems: A Comparative Study Of Enterpise Application Integration (Eai) Vs Enterprise Resource Planning (Erp), Randall W. Brown Aug 2007

Implementation Of Enterprise Information Systems: A Comparative Study Of Enterpise Application Integration (Eai) Vs Enterprise Resource Planning (Erp), Randall W. Brown

Information Systems & Operations Management Dissertations - Archive

This dissertation is a two part study which examines and compares two of the most common Enterprise Integration technologies: Enterprise Resource Planning (ERP) and Enterprise Application Integration (EAI). The first part examines the perceptions of individuals toward each of the technologies. The second part of the study compares and contrasts the two Enterprise Integration technologies with respect to the factors leading to success (or failure). The model determines three levels of factors and is derived from the two-factor motivational studies of Herzberg and Maslow's Hierarch of Needs. In addition, it attempts to discover which groups of factors may be more …

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Data Mining And Statistics: Examining Critical Patterns Of Research And Practice, Ailing Wang Aug 2007

Data Mining And Statistics: Examining Critical Patterns Of Research And Practice, Ailing Wang

Information Systems & Operations Management Dissertations - Archive

Data Mining (DM) has gained increasing attention in academia and growing importance in business over past decades. This is a study to examine the current status of DM in both research and practice with a focus on the role of statistics for the advancement of the field. Being multi-disciplinary in nature, DM challenges researchers to work together and be aware of the progress made in other fields in order to contribute towards the development of the field. By employing citation analysis techniques and using publicly available citation data, I empirically examine how DM reference fields, such as statistics, machine learning, …

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Influence Of Codified Knowledge On Software Design Task Performance: A Comparison Of Pairs With Individuals, George Ashok Mangalaraj Aug 2007

Influence Of Codified Knowledge On Software Design Task Performance: A Comparison Of Pairs With Individuals, George Ashok Mangalaraj

Information Systems & Operations Management Dissertations - Archive

The need to improve the success rates of software development projects has prompted the software engineering community to come-up with various initiatives. These initiatives include: new software development processes such as Extreme Programming (XP), leveraging the development process by reusing existing knowledge of software artifacts. XP utilizes pairs in the performance of various software development tasks. Moreover, development of software applications is a knowledge intensive process that utilizes both tacit and explicit knowledge. This experimental study utilized software development professionals as subjects and manipulated the mode of participation (individual or pairs) and availability of codified knowledge (design patterns). Results of …

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Career Influences For Women In Landscape Architecture, Catherine Louise Acuna Aug 2007

Career Influences For Women In Landscape Architecture, Catherine Louise Acuna

Landscape Architecture Masters & Design Theses - Archive

This research explores the insights of successful women who are pioneering the practice of landscape architecture in today's practice. Their perspectives regarding the impediments and advantages of women in current practice are examined within the public, private and academic practices of landscape architecture. Also examined are methods that are being used to overcome limitations, as well as advantages utilized in each area of practice. Finally, critical counsel and perspectives of the future of the profession are directed toward future generations of women in landscape architecture who aspire to follow in their path.

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The Connection Between Landscape Architecture And Water Quality: A Survey Of Landscape Architects In Texas, Andrea Lora Davis Aug 2007

The Connection Between Landscape Architecture And Water Quality: A Survey Of Landscape Architects In Texas, Andrea Lora Davis

Landscape Architecture Masters & Design Theses - Archive

For local jurisdictions and consumers, water quality has become importantas development pressures and expanding population has increased the strain on existing water supplies. Aging infrastructure, limited financial resources, and environmental regulations are forcing many users to seek alternatives to traditional water treatment and storm conveyance systems. Landscape architects can utilize many environmentally sound methods and technology to protect water quality. The opportunity is there to incorporate measures such as buffers, low-impact development, open space design, rain gardens, basins, and native plantings in the design process. A survey of practicing landscape architects in Texas demonstrated the trends of alternative measures applications …

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Prospect-Refuge Theory Revisited: A Search For Safety In Dynamic Public Spaces With A Reference To Design, Priti Ramanujam Aug 2007

Prospect-Refuge Theory Revisited: A Search For Safety In Dynamic Public Spaces With A Reference To Design, Priti Ramanujam

Landscape Architecture Masters & Design Theses - Archive

Prospect-refuge theory (Appleton 1975) is based on habitat theory (Darwin 1958) which states that the ability to see (prospect) but not be seen (refuge) is basic to many biological needs. According to Appleton, the ability to see without being seen increases perceived safety which increases the esthetic pleasure experienced in the environment. Wekerle and Egan (1991) state that the perception of safety is necessary for feelings of enjoyment and comfort in urban open space. Appleton's hypothesized factors--prospect and refuge--are known to affect people's perception of how safe an environment appears to be. This thesis studies perception of safety in dynamic …

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The Green: Building A Viable Program For Forgotten Public Space In Uptown Dallas, Larry Biff Sturgess Aug 2007

The Green: Building A Viable Program For Forgotten Public Space In Uptown Dallas, Larry Biff Sturgess

Landscape Architecture Masters & Design Theses - Archive

The Uptown area of Dallas has seen rapid and drastic change over the last fifteen years. The conversion of the former Missouri-Kansas-Texas (KATY) Railroad line into the KATY Trail has instigated measurable increases in adjacent property values, while new middle and high-end condominiums and townhomes have replaced older and often dilapidated single- and multi-family structures. Extended trolley service and new light rail service now provide multiple means of access into the area from further-reaching regions. The overall result has provided Uptown with a vibrant mix of new residential, retail and business opportunities, with a quality of life that has visible …

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Finding Common Ground: Community Garden As Connector Between Culture, Nature, And The Individual, Valerie Dawn Warner Aug 2007

Finding Common Ground: Community Garden As Connector Between Culture, Nature, And The Individual, Valerie Dawn Warner

Landscape Architecture Masters & Design Theses - Archive

In the vacant spaces between buildings, in the corners of school yards, in open fields - wherever community gardens are deliberately placed - the space between culture and nature grows smaller. Closing this gap can come about on the common ground created in a collaborative spirit: the community changes the space, and then the space ultimately changes the community. This is the connective power of the humble community garden. This study finds that in urban environments, a community garden can be the link between individuals and their community, and between people and nature, imparting health of body and mind, feelings …

Go to article

Career Influences For Women In Landscape Architecture, Catherine Louise Acuna Aug 2007

Career Influences For Women In Landscape Architecture, Catherine Louise Acuna

Landscape Architecture Masters & Design Theses - Archive

This research explores the insights of successful women who are pioneering the practice of landscape architecture in today's practice. Their perspectives regarding the impediments and advantages of women in current practice are examined within the public, private and academic practices of landscape architecture. Also examined are methods that are being used to overcome limitations, as well as advantages utilized in each area of practice. Finally, critical counsel and perspectives of the future of the profession are directed toward future generations of women in landscape architecture who aspire to follow in their path.

Go to article

The Moderating Effects Of Vegetation On Human Violent Behavior Caused By Environmental Stressors, Jieun Lim Aug 2007

The Moderating Effects Of Vegetation On Human Violent Behavior Caused By Environmental Stressors, Jieun Lim

Landscape Architecture Masters & Design Theses - Archive

Numerous studies explain the relationship between the environment and human behavior using the term "environmental stressor." Some examples of environmental stressors are temperature, air pollution, noise, and density and crowding. The negative effects of these environmental stressors on humans occur in the form of mental fatigue and lead to increased anger, aggression, and even violence. Environments such as urban forests provide a number of benefits for one's quality of life. People living in vegetated areas feel lower levels of fear, and have less aggressive and violent behavior. In this light, this study hypothesizes that population density in urbanized areas can …

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Analysis Of The Congress Of New Urbanism Landscape Design Principles And Social Interaction, David Bartz Aug 2007

Analysis Of The Congress Of New Urbanism Landscape Design Principles And Social Interaction, David Bartz

Landscape Architecture Masters & Design Theses - Archive

The Congress of New Urbanism (CNU) is a relatively new topic among urban developers, planners, and city leaders. It seeks to change the way cities and towns are built by creating compact neighborhoods that encourage pedestrian activity. This study was an exploration of the design principles of the Congress of New Urbanism (CNU) as they relate to contemporary neighborhood design research and how effective they are at stimulating social interaction through increased use of outdoor areas. The context of the study stems from the CNU implying that friendly sociable neighborhoods can be physically designed (Talen 2002). More specifically the CNU …

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The Connection Between Landscape Architecture And Water Quality: A Survey Of Landscape Architects In Texas, Andrea Lora Davis Aug 2007

The Connection Between Landscape Architecture And Water Quality: A Survey Of Landscape Architects In Texas, Andrea Lora Davis

Landscape Architecture Masters & Design Theses - Archive

For local jurisdictions and consumers, water quality has become importantas development pressures and expanding population has increased the strain on existing water supplies. Aging infrastructure, limited financial resources, and environmental regulations are forcing many users to seek alternatives to traditional water treatment and storm conveyance systems. Landscape architects can utilize many environmentally sound methods and technology to protect water quality. The opportunity is there to incorporate measures such as buffers, low-impact development, open space design, rain gardens, basins, and native plantings in the design process. A survey of practicing landscape architects in Texas demonstrated the trends of alternative measures applications …

Go to article

Prospect-Refuge Theory Revisited: A Search For Safety In Dynamic Public Spaces With A Reference To Design, Priti Ramanujam Aug 2007

Prospect-Refuge Theory Revisited: A Search For Safety In Dynamic Public Spaces With A Reference To Design, Priti Ramanujam

Landscape Architecture Masters & Design Theses - Archive

Prospect-refuge theory (Appleton 1975) is based on habitat theory (Darwin 1958) which states that the ability to see (prospect) but not be seen (refuge) is basic to many biological needs. According to Appleton, the ability to see without being seen increases perceived safety which increases the esthetic pleasure experienced in the environment. Wekerle and Egan (1991) state that the perception of safety is necessary for feelings of enjoyment and comfort in urban open space. Appleton's hypothesized factors--prospect and refuge--are known to affect people's perception of how safe an environment appears to be. This thesis studies perception of safety in dynamic …

Go to article

The Green: Building A Viable Program For Forgotten Public Space In Uptown Dallas, Larry Biff Sturgess Aug 2007

The Green: Building A Viable Program For Forgotten Public Space In Uptown Dallas, Larry Biff Sturgess

Landscape Architecture Masters & Design Theses - Archive

The Uptown area of Dallas has seen rapid and drastic change over the last fifteen years. The conversion of the former Missouri-Kansas-Texas (KATY) Railroad line into the KATY Trail has instigated measurable increases in adjacent property values, while new middle and high-end condominiums and townhomes have replaced older and often dilapidated single- and multi-family structures. Extended trolley service and new light rail service now provide multiple means of access into the area from further-reaching regions. The overall result has provided Uptown with a vibrant mix of new residential, retail and business opportunities, with a quality of life that has visible …

Go to article

The Moderating Effects Of Vegetation On Human Violent Behavior Caused By Environmental Stressors, Jieun Lim Aug 2007

The Moderating Effects Of Vegetation On Human Violent Behavior Caused By Environmental Stressors, Jieun Lim

Landscape Architecture Masters & Design Theses - Archive

Numerous studies explain the relationship between the environment and human behavior using the term "environmental stressor." Some examples of environmental stressors are temperature, air pollution, noise, and density and crowding. The negative effects of these environmental stressors on humans occur in the form of mental fatigue and lead to increased anger, aggression, and even violence. Environments such as urban forests provide a number of benefits for one's quality of life. People living in vegetated areas feel lower levels of fear, and have less aggressive and violent behavior. In this light, this study hypothesizes that population density in urbanized areas can …

Go to article

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