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Articles 11371 - 11400 of 13847

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Stress, Fatigue And Workload: Determining The Combined Affect On Human Performance, Jessica Mock-Mclaughlin Jan 2007

Stress, Fatigue And Workload: Determining The Combined Affect On Human Performance, Jessica Mock-Mclaughlin

Electronic Theses and Dissertations

This research generated a model that will help to predict, prevent, control and mitigate the occurrence of task related factors that negatively influence stress, fatigue, and workload; thus enhancing human performance. Past research efforts involving stress, fatigue and workload identified factors that influence a change in performance (Lan, Ji and Looney, 2003, and Hancock & Warm, 1989). Also, while some mathematical models have been developed within each respective area, however, there is no evidence of an integrated model describing the combined affect of stress, fatigue and workload. To respond to this research gap, a quantitative model representing the state of …

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Optimization Models For Emergency Relief Shelter Planning For Anticipated Hurricane Events, Abeer Tarief Sharawi Jan 2007

Optimization Models For Emergency Relief Shelter Planning For Anticipated Hurricane Events, Abeer Tarief Sharawi

Electronic Theses and Dissertations

Natural disasters, specifically hurricanes, can cause catastrophic loss of life and property. In recent years, the United States has endured significant losses due to a series of devastating hurricanes (e.g., Hurricanes Charley and Ivan in 2004, and Hurricanes Katrina and Wilma in 2005). Several Federal authorities report that there are weaknesses in the emergency and disaster planning and response models that are currently employed in practice, thus creating a need for better decision models in emergency situations. The current models not only lack fast communication with emergency responders and the public, but are also inadequate for advising the pre-positioning of …

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Developing A Spatial Interface For Information Visualization And Management In A Crisis Response Scenario, Anthony Costello Jan 2007

Developing A Spatial Interface For Information Visualization And Management In A Crisis Response Scenario, Anthony Costello

Electronic Theses and Dissertations

The focus of this study was to investigate how a spatial interface can be effectively utilized to support information presentation and information integration via human-centric data visualization, leading to decreased cognitive load, more accurate situation awareness, and subsequently, improved task performance. In high tempo, information intensive environments like those managed by an emergency operations center (EOC), information organization tools are essential. Though users can be trained to use conventional email software applications efficiently, the constraints of the information management paradigms inherent to conventional systems may limit a user's ability to gather context and create an accurate picture of the situation. …

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Using Surrogate Measures To Predict Patient Satisfaction In The Emergency Department, Erica Egri Jan 2007

Using Surrogate Measures To Predict Patient Satisfaction In The Emergency Department, Erica Egri

Electronic Theses and Dissertations

With healthcare organizations struggling to remain competitive and financially stable in a market where minimizing costs is a priority, hospital administrators feel the sense of urgency when it comes to keeping patients satisfied with services in order to expand volume and market share. The Emergency Department is considered the front door of a healthcare organization, and keeping its visitors satisfied in order to guarantee a future visit or a referral to a friend or family member is a must. While patient input on the services received in a healthcare facility is essential to improving quality of care, the costs associated …

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Buffer Techniques For Stochastic Resource Constrained Project Scheduling With Stochastic Task Insertions Problems, Jennifer Grey Jan 2007

Buffer Techniques For Stochastic Resource Constrained Project Scheduling With Stochastic Task Insertions Problems, Jennifer Grey

Electronic Theses and Dissertations

Project managers are faced with the challenging task of managing an environment filled with uncertainties that may lead to multiple disruptions during project execution. In particular, they are frequently confronted with planning for routine and non-routine unplanned work: known, identified, tasks that may or may not occur depending upon various, often unpredictable, factors. This problem is known as the stochastic task insertion problem, where tasks of deterministic duration occur stochastically. Traditionally, project managers may include an extra margin within deterministic task times or an extra time buffer may be allotted at the end of the project schedule to protect the …

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Mass Customization Strategies And Their Relationship To Lean Production In The Homebuilding Industry, Isabelina Nahmens Jan 2007

Mass Customization Strategies And Their Relationship To Lean Production In The Homebuilding Industry, Isabelina Nahmens

Electronic Theses and Dissertations

Current housing trends point to an increasing interest from homebuyers to demand houses that reflect their personal and unique styles, and which are individually configured according to these needs (NAHB, 2004). These homebuyers in turn are unwilling to settle for standard models that sacrifice what they really want in a home. At the same time this creates pressure on builders who are reluctant to sacrifice production efficiencies by deviating from standard models. Such customization desired by demanding customers can disrupt the entire estimating, production, delivery and management process, making it even more difficult to manage homebuilding efficiently and effectively. The …

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Optimizing The Design Of Multimodal User Interfaces, Leah Reeves Jan 2007

Optimizing The Design Of Multimodal User Interfaces, Leah Reeves

Electronic Theses and Dissertations

Due to a current lack of principle-driven multimodal user interface design guidelines, designers may encounter difficulties when choosing the most appropriate display modality for given users or specific tasks (e.g., verbal versus spatial tasks). The development of multimodal display guidelines from both a user and task domain perspective is thus critical to the achievement of successful human-system interaction. Specifically, there is a need to determine how to design task information presentation (e.g., via which modalities) to capitalize on an individual operator's information processing capabilities and the inherent efficiencies associated with redundant sensory information, thereby alleviating information overload. The present effort …

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Cognitive Learning From Computer-Based Information Systems By Incorporating Knowledge Construction Interventions, Wajdi Wazzan Jan 2007

Cognitive Learning From Computer-Based Information Systems By Incorporating Knowledge Construction Interventions, Wajdi Wazzan

Electronic Theses and Dissertations

The aim of the present study was to develop and empirically evaluate different categories of instructional activities, which stimulate the generation and construction of knowledge on the part of an individual student. These generative activities are primed by prompts or scaffolds, which can easily be inserted into specific curriculum addressing any domain of knowledge. To assess the manner in which the knowledge construction interventions influence the learning outcomes from computerized information systems, we have developed an online computer-based information system that describes the functions and mechanisms associated with the bus system of the US army Abrams M1A2 tank. Seven versions …

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Management Systems Fit For Organizational Performance, Rey Diaz Jan 2007

Management Systems Fit For Organizational Performance, Rey Diaz

Electronic Theses and Dissertations

The present study identifies the dimensions and variables using prior research within each of the constructs under the management systems, fit and, organizational strategy, structure, lifecycle and performance. The constructs from the research model were defined with a combination of direct, calculated and coded measures. Context analysis for each case categorized management systems design into either prescriptive or descriptive. The selected performance measures have been extensively investigated in the research fields associated with organizational management. The study uses the multiple case study design with cross-sectional data spanning from 1991 to 2005 and involving 19 aerospace companies in the United States. …

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Towards A Diagnostic Framework For Understanding Complex Situations, José J. Padilla, Andres Sousa-Poza, Arturo Tejada, Samuel Kovacic Jan 2007

Towards A Diagnostic Framework For Understanding Complex Situations, José J. Padilla, Andres Sousa-Poza, Arturo Tejada, Samuel Kovacic

VMASC Publications

This paper presents a theoretical framework for the concept of understanding and how it can be used for assessing complex situations. Understanding is presented as a cognitive process on how an individual perceives and represents a complex domain based on his/her own predispositions, and how he/she selects knowledge or what may not be knowledge based on the same predispositions towards finding a set of solutions for the situation. Predispositions, in this case, are based on his/her epistemological, ontological and teleological biases while the domain is represented by irreducible and transient conditions. The final outcome is the match or mismatch of …

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Converting Some Global Optimization Problems To Mixed Integer Linear Problems Using Piecewise Linear Approximations, Manish Kumar Jan 2007

Converting Some Global Optimization Problems To Mixed Integer Linear Problems Using Piecewise Linear Approximations, Manish Kumar

Masters Theses

"Some global optimization problems are converted to mixed-integer linear problems (MILP) using piecewise-linear approximations in this thesis so that they can be solved using commercial MILP solvers, such as CPLEX. Special attention is given to approximating two-term log-sum functions, which appears frequently in generalized geometric programming problems. Numerical results indicate the proposed approach is sound and efficient"--Abstract, page iii.

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Security Architecture Methodology For Large Net-Centric Systems, Njideka Adaku Umeh Jan 2007

Security Architecture Methodology For Large Net-Centric Systems, Njideka Adaku Umeh

Masters Theses

"This thesis describes an over-arching security architecture methodology for large network enabled systems that can be scaled down for smaller network centric operations such as present at the University of Missouri-Rolla. By leveraging the five elements of security policy & standards, security risk management, security auditing, security federation and security management, of the proposed security architecture and addressing the specific needs of UMR, the methodology was used to determine places of improvement for UMR"--Abstract, page iii.

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Use Of Analytical Hierarchy Process In University Strategy Planning, Mihir Gokhale Jan 2007

Use Of Analytical Hierarchy Process In University Strategy Planning, Mihir Gokhale

Masters Theses

"The selection of an appropriate strategy is critical for a university's success, and each university needs to capitalize on its own specialties and competencies for a competitive advantage. Strategy creation and planning in universities is generally a collective effort which relies on consensus. It is a complex process involving the setting of objectives and goals to achieve the strategic vision, and an analysis tool for evaluating and comparing different options and prioritizing objectives and goals is required. A high deductive capacity is necessary for aggregating the different trade-offs while prioritizing, which is challenging for a human mind. This thesis demonstrates …

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Bridge Damage Detection Using An Intelligent Engineering System, Dionysios N. Danilatos Jan 2007

Bridge Damage Detection Using An Intelligent Engineering System, Dionysios N. Danilatos

Masters Theses

"This thesis concerns the design of an algorithm that is capable to detect structural damage in civil infrastructure bridges. The algorithm, which will be dubbed Damage Diagnostics System throughout the thesis, is the software component of a broader Bridge Health Monitoring System. This broader system integrates software and hardware,such as sensors and data acquisition components...The rationale for the Structural Damage Diagnosis is based on the principle of the structural vibration testing. The Health Monitoring System captures the vibration signals, as the bridge responds to excitation from various sources. The purpose of the Diagnostic System is to extract information from the …

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Integrated Product And Its Extended Enterprise Network Design Using Lean Principles, Abhijit K. Choudhury Jan 2007

Integrated Product And Its Extended Enterprise Network Design Using Lean Principles, Abhijit K. Choudhury

Masters Theses

"Recently, many system integration companies have begun to intensely focus on suppliers' involvement in the product realization process to enhance their competitiveness. The product architecture has a huge impact on the efficiency of the integrator's supplier network. One of the ways to enhance efficiency is to implement the lean principles while creating a collaborative design/manufacturing/supply chain environment. In this study, two distinct stages of the product realization process, namely, design stage and production stage are considered for determining the design and production supplier networks"--Abstract, page iv.

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Understanding Behavior Of System Of Systems Through Computational Intelligence Techniques, Nil H. Kilicay, Cihan H. Dagli Jan 2007

Understanding Behavior Of System Of Systems Through Computational Intelligence Techniques, Nil H. Kilicay, Cihan H. Dagli

Engineering Management and Systems Engineering Faculty Research & Creative Works

The world is facing an increasing level of systems integration leading towards systems of systems (SoS) that adapt to changing environmental conditions. The number of connections between components, the diversity of the components and the way the components are organized can lead to different emergent system behavior. Therefore, the need to focus on overall system behavior is becoming an unavoidable issue. The problem is to develop methodologies appropriate for better understanding behavior of system of systems before the design and implementation phase. This paper focuses on computational intelligence techniques used for analysis of complex adaptive systems with the aim of …

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Technology And Competence Alignment To The Roadmap, Mihir M. Gokhale, Donald D. Myers Jan 2007

Technology And Competence Alignment To The Roadmap, Mihir M. Gokhale, Donald D. Myers

Engineering Management and Systems Engineering Faculty Research & Creative Works

Roadmaps serve as a useful graphical tool to integrate strategic objectives, technology-assessment, technology-road mapping and product road mapping against an axis of time. Much research has been done related to linking specific technologies with the product roadmap. It is equally important to understand how the sourcing of this technology can be done. This leads to the discussion of competence development to meet the technology gap. the paper describes the alignment of this technology and competence with the overall roadmap. © 2008 IEEE.

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Adaptive Neural Network Based Stabilizing Controller Design For Single Machine Infinite Bus Power Systems, Wenxin Liu, Ganesh K. Venayagamoorthy, Donald C. Wunsch, David A. Cartes, Jagannathan Sarangapani, Mariesa Crow Jan 2007

Adaptive Neural Network Based Stabilizing Controller Design For Single Machine Infinite Bus Power Systems, Wenxin Liu, Ganesh K. Venayagamoorthy, Donald C. Wunsch, David A. Cartes, Jagannathan Sarangapani, Mariesa Crow

Engineering Management and Systems Engineering Faculty Research & Creative Works

Power system stabilizers are widely used to generate supplementary control signals for the excitation system in order to damp out the low frequency oscillations. In power system control literature, the performances of the proposed controllers were mostly demonstrated using simulation results without any rigorous stability analysis. This paper proposes a stabilizing neural network (NN) controller based on a sixth order single machine infinite bus power system model. The NN is used to approximate the complex nonlinear dynamics of power system. Unlike the other indirect adaptive NN control schemes, there is no offline training process and the NN can be directly …

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An Evaluation Of Mahalanobis-Taguchi System And Neural Network For Multivariate Pattern Recognition, Jungeui Hong, Rajesh Jugulum, Kioumars Paryani, K. M. Ragsdell, Genichi Taguchi, Elizabeth A. Cudney Jan 2007

An Evaluation Of Mahalanobis-Taguchi System And Neural Network For Multivariate Pattern Recognition, Jungeui Hong, Rajesh Jugulum, Kioumars Paryani, K. M. Ragsdell, Genichi Taguchi, Elizabeth A. Cudney

Engineering Management and Systems Engineering Faculty Research & Creative Works

The Mahalanobis-Taguchi System is a diagnosis and predictive method for analyzing patterns in multivariate cases. The goal of this study is to compare the ability of the Mahalanobis- Taguchi System and a neural-network to discriminate using small data sets. We examine the discriminant ability as a function of data set size using an application area where reliable data is publicly available. The study uses the Wisconsin Breast Cancer study with nine attributes and one class.

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Integrating It-Enabled Social Networks With Transaction Cost Economics And The Resource Based View Of The Firm, Ganesh D. Bhatt, Jatinder N. D. Gupta, Sushil K. Sharma Jan 2007

Integrating It-Enabled Social Networks With Transaction Cost Economics And The Resource Based View Of The Firm, Ganesh D. Bhatt, Jatinder N. D. Gupta, Sushil K. Sharma

Journal of International Technology and Information Management

Prior research has mostly focused on transaction cost economics (TCE) to interpret the effect of information systems (IS) on organizational governance structures. A TCE based approach predicts that information technology (IT) will lead to increased use of electronic markets to coordinate economic transactions from electronic hierarchies. However, there is contradictory evidence in the literature regarding the rise and importance of cooperative relationships, joint ventures, and value-added partnerships integrated through information systems. To reconcile these contradictions, this paper analyzes the effect of IT on governance structures based on the TCE, social network theory, and the resource based view (RBV) of the …

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In Search Of Factors To Online Game Addiction And Its Implications, Yangil Park, Jeng-Chung V. Chen Jan 2007

In Search Of Factors To Online Game Addiction And Its Implications, Yangil Park, Jeng-Chung V. Chen

Journal of International Technology and Information Management

Research has explored online users who are hooked on Internet applications such as chat rooms, web surfing, and interactive games. Online game addiction is one of the problems arisen from the use of the Internet. This study is motivated by a causal connection found from previous research of computer game addiction. The study describes two typical types of online games and looks further into the causes of the addiction by using two main theories. We also propose research hypotheses and discuss possible implications of online game addiction.

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An Examination Of Internet Effectiveness For Non-Work Activities, Pruthikrai Mahatanankoon, Tim Klaus, H. Joseph Wen Jan 2007

An Examination Of Internet Effectiveness For Non-Work Activities, Pruthikrai Mahatanankoon, Tim Klaus, H. Joseph Wen

Journal of International Technology and Information Management

The Internet is frequently used for non-work activities. When used for these purposes, the effectiveness of the Internet in accomplishing these leisure activities becomes an important consideration. Research literature has remained relatively silent in regards to the examination of accomplishing non-work tasks through the Internet. This study uses Davis’ Technology Acceptance Model (TAM) as a basis to predict different types of common user web activities—entertainment, communicating, and information searching. Using Structured Equation Modeling, this paper examines the effectiveness of the Internet in accomplishing non-work activities. In this study, the overall analysis of the survey data suggests that perceived ease of …

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Internet Entrepreneurship And Economic Growth, Gerald V. Post, John F. Pfaff Jan 2007

Internet Entrepreneurship And Economic Growth, Gerald V. Post, John F. Pfaff

Journal of International Technology and Information Management

This paper looks at national attempts to promote economic growth through the Internet. Growth can be driven through service exports or internally through increased service transactions and fostering entrepreneurship. India is often held as an example of service exports, but economic statistics show that India might not be a good example for other nations because net service trade is negative and wages have been economically distorted. Ultimately, developing nations need to find internal growth models. Internal growth could be driven though increased consumption due to improved information, or increased investment expenditures from infrastructure investments.

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Project Management Practices In The Information Technology Departments Of Various Size Institutions Of Higher Education, Charles R. Johnston, David C. Wierschem Jan 2007

Project Management Practices In The Information Technology Departments Of Various Size Institutions Of Higher Education, Charles R. Johnston, David C. Wierschem

Journal of International Technology and Information Management

The demand for information technology at institutions of higher education is increasing at a rapid pace. It is fueled by student, faculty, and administrative needs. This paper examines project management practices at these institutions with respect to the sizes of the institutions. Survey results indicate an emphasis on operational concerns at small and medium size institutions when selecting IT projects. The prominence of the role of project manager and adoption of formal PM tools/techniques by IT departments generally increase with the sizes of the institutions. The importance of having a project plan is recognized by all sizes of institutions of …

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An Analysis Of The D Programming Language, Sumanth Yenduri, Louise Perkins, Md. Sarder Jan 2007

An Analysis Of The D Programming Language, Sumanth Yenduri, Louise Perkins, Md. Sarder

Journal of International Technology and Information Management

The C language and its derivatives have been some of the dominant higher-level languages used, and the maturity has stemmed several newer languages that, while still relatively young, possess the strength of decades of trials and experimentation with programming concepts. While C++ was a major step in the advancement from procedural to object-oriented programming (with a backbone of C), several problems existed that prompted the development of new languages. This paper focuses on one such language: D. D was designed as a potential successor to C++, supporting most features of C++’s class design and modifications intended to ease common program …

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Development Of A Maintenance System Based On Web And Mobile Technologies, Jaime Campos, Erkki Jantunen, Om Prakash Jan 2007

Development Of A Maintenance System Based On Web And Mobile Technologies, Jaime Campos, Erkki Jantunen, Om Prakash

Journal of International Technology and Information Management

The paper reports the development of an e-monitoring and maintenance system based on web technology and mobile device, PDA. Rarity of experts led to the application of artificial intelligence and later, distributed artificial intelligence for condition monitoring and diagnosis of machine condition. Recently, web technology along with wireless communication is emerging as a potent tool in maintenance. It facilitates obtaining of the desired information by the relevant personnel at any time wherever he may be. The paper first describes the web and mobile architecture that formed the basis of the system and ICT tools used to communicate among the different …

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Comparing The Prioritization Of Erp System Effectiveness Measures By Organizational Actors: A Focus On It Professionals And Business Managers, Princely Ifinedo Jan 2007

Comparing The Prioritization Of Erp System Effectiveness Measures By Organizational Actors: A Focus On It Professionals And Business Managers, Princely Ifinedo

Journal of International Technology and Information Management

Modern organizations adopt Enterprise Resource Planning systems (ERP) to integrate their organizational data resources into unified systems. Researchers tend to concentrate on ERP implementation issues with only a handful studying ERP system effectiveness or success in adopting organizations. In fact, none has studied how key organizational actors prioritize or rank relevant measures or items related to the effectiveness of such systems. This study is designed to fill this gap in research as it aims at investigating how two organizational stakeholder groups, i.e. information technology (IT) professionals and business managers prioritize relevant measures related to ERP systems effectiveness. Using surveys in …

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Strategic Alliances In Greek Mobile Telephony, Ioanna Stoili, Anastasios A. Economides Jan 2007

Strategic Alliances In Greek Mobile Telephony, Ioanna Stoili, Anastasios A. Economides

Journal of International Technology and Information Management

The mobile telephony market is a very competitive market. Mobile telephony companies try to expand by forming strategic alliances with companies from various industries. The objective of this paper is to analyze the motives, the actions and the results of the collaborations and alliances of two Greek mobile telephony companies (Cosmote and Vodafone Hellas). In addition, this paper illustrates examples of how the technology change and the technological convergence (Internet, computers, and mobile telephony) affected and activated the proliferation of these alliances. The entry of I-mode and Vodafone Live! in the Greek market caused an increase in the number of …

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Improving Credit Card Operations With Data Mining Techniques, Malini Krishnamurthi Jan 2007

Improving Credit Card Operations With Data Mining Techniques, Malini Krishnamurthi

Journal of International Technology and Information Management

Consumer credit is ubiquitous and lending poses credit risk – the risk of economic loss due to the failure of a borrower to repay according to the terms of his or her contract with the lender. And so, managing credit risk entails estimating the potential ability of borrowers to repay their debts. Researchers have sought to identify factors that contribute to consumer risk, by using quantitative models. However, the presence of data mining techniques to identify credit risk cannot be ignored. There is a paucity of research to demonstrate the use of data mining techniques in this context, and such …

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Internet Industry Competition Dynamics: Peering Limitations, Exposure, And Counter Strategies, Seungjae Shin, Jack E. Tucci Jan 2007

Internet Industry Competition Dynamics: Peering Limitations, Exposure, And Counter Strategies, Seungjae Shin, Jack E. Tucci

Journal of International Technology and Information Management

The Internet industry is vertically integrated with Internet Backbone Providers (IBPs) and Internet Service Providers (ISPs.) Although there are many ISPs and IBPs in each stream, both markets are considered independent oligopolies in that there are a few dominant competitors in each market. It is generally accepted that the Internet industry structure has evolved into a four-tier hierarchical structure. The synergistic and codependent nature of the Internet industry is the key element in understanding the competitive environment in which both IBP’s and ISP’s cooperate. Peering is an efficient way to exchange traffic freely within the access tier, nevertheless competitive constraints …

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