Digital Commons Network^™

Infinitely Many Radial Solutions For A Sub-Super Critical Dirichlet Boundary Value Problem In A Ball, Alfonso Castro, John Kwon, Chee Meng Tan '07

All HMC Faculty Publications and Research

We prove the existence of infinitely many solutions to a semilinear Dirichlet boundary value problem in a ball for a nonlinearity g(u) that grows subcritically for u positive and supercritically for u negative.

Quarternary Alluvial Deposition In The Upper Green River Valley, Kentucky, Juan Herrera

Masters Theses & Specialist Projects

This research describes the alluvial deposits and Quaternary geomorphic evolution of the Upper Green River in Kentucky by documenting the nature of flood plain sediments at two sites along the valley bottom of the Upper Green River between Mammoth Cave National Park and Green River Lake. Field methods employed included stratigraphic descriptions of bank exposures and borings obtained in flood plain surfaces, along with textural and radiocarbon analysis of sediment samples. Sediment samples from boreholes and bank exposures in two study sites (Pitman Creek confluence, -PCC- and Upper Green River Biological Preserve -UGRBP-) were collected and sieved to determine grain …

Building Energy-Efficient Broadcast Trees Using A Genetic Algorithm In Wireless Sensor Networks, Min Kyung An

Computer Science and Engineering Theses - Archive

In wireless broadcast environment, data can be transmitted to several nodes by a single transmission. The nodes in that environment have limited energy resources; therefore we need to reduce the energy consumption when they broadcast data to all nodes to prolong the lifetime of the networks. We call this problem the MPB (minimum power broadcast) problem, and solving the problem has been shown to be an NP-Complete problem [2], [11]. We focus on finding 'near-optimal' solutions for the problem. An algorithm for constructing the minimum power broadcast trees, named BIP (broadcast incremental power) algorithm, was first proposed by Wieselthier et …

M-Infosift : A Graph-Based Approach For Multiclass Document Classification, Aravind Venkatachalam

Computer Science and Engineering Theses - Archive

With the increase in the amount of data being introduced into the Internet on a daily basis, the problem of managing large amount of data is an unavoidable problem. The area of document classification has been examined, explored and experimented as a technique for organizing and managing vast repositories of electronic documents such as emails, text and web pages. Over the past decade, several approaches such as machine learning, data mining, information retrieval and others have been proposed for addressing this problem of classifying electronic documents. While a majority of these techniques rely on extracting high-frequency keywords, they ignore the …

Resource Adaptive Agent Based Fault Tolerant Architecture, Shreyas Shetty

Computer Science and Engineering Theses - Archive

Pervasive environment consists of increasing number of mobile, tiny and heterogeneous devices communicating through interconnected network. As ubiquitous computing has seeped into various aspects of everyday life, there has been an increasing demand for dependable systems. However providing reliability demands fault tolerance mechanisms that require substantial time and resources. The dynamic nature and the uncertainty associated with pervasive systems coupled with the energy constraints of the devices involved makes fault tolerance a challenging task. In general, the techniques used to provide fault-tolerance are based on having redundancy and duplication of the user tasks. However the additional cost and the low …

Incremental Retrieval And Ranking Of Complex Patterns From Text Repositiories, Jayakrishna Thathireddy

Computer Science and Engineering Theses - Archive

As the volume of information accessible via the electronic medium (such as the Internet) is staggeringly large and growing rapidly, users have to sift through vast reservoirs of information to retrieve relevant data of their choice. It has been estimated that, the Internet consists of 2.5 billion unique, publicly accessible web-pages and this figure is growing at an alarming rate of 7.3 million pages per day. Currently, the only way to wade through such colossal information is by using search engines (such as Google, Live, Yahoo, etc.). Although the popularity of search engines has increased manifold due to -- simplicity …

Top K Query Processing In Distributed Database, Amrita Tamrakar

Computer Science and Engineering Theses - Archive

Today's data is rarely stored in centralized location due to the enormous amount of information that needs to be stored and also to increase reliability, availability and performance of the system. Same data is stored in different format into different company's database as well as they may be partitioned or replicated. We consider various scenarios of distributed database such as horizontal, vertical fragmentation and attribute overlapping. Allowing access to integrated information from these multiple datasets can provide accurate and wholesome information to the end-user. We research on efficient querying to these distributed databases to get top k elements matching the …

Sequence Alignment Editor - A New Tool To Assist With Inferring Phylogenetic And Functional Relationships In Biological Data, Ramya Raghukumar

Computer Science and Engineering Theses - Archive

Biologists study evolution, discover functional and structural information in genomic or protein data through the extensive use of sequence alignments. It is very difficult to manually align long regions, so development of methods for this task continues to be an active area of research. Alignment construction algorithms, based on dynamic programming, approach the problem from a mathematical perspective. The optimal alignment is computed relative to a scoring scheme. The resulting layout is guaranteed to be mathematically optimal, though not necessarily biologically meaningful. Sequence alignments usually account only for single letter substitutions and relatively short indels, representing the latter as gaps. …

Performance Analysis Of Caching Effect On Real Time Packet Processing In A Multi-Threaded Processor, Miao Ju

Computer Science and Engineering Theses - Archive

Caching has been time proven to be a very effective technique to improve memory access speed and average performance for general processors. Based on the real-world trace simulation, earlier research showed that cache can help improve the route lookup and packet classification performance in a Network Processor (NP). However, the existing studies did not take the packet delay/loss constraints into account. As a result, how effective the caching technique is, in dealing with traffic under stringent delay/loss constraints (as is the case for router interface using an NP for packet processing), is still an open issue. In this thesis, we …

Rate Control Algorithms For Ieee 802.11 Wireless Networks, Bodhisatwa Chakravarty

Computer Science and Engineering Theses - Archive

This thesis evaluates software driven rate selection algorithms used in IEEE 802.11 wireless network interface cards. The motive of the bit-rate selection techniques is to optimize the throughput over the wireless network out of the many rates that are supported by the IEEE 802.11 link. The decision to switch from one rate to another with the changing link conditions to optimize the throughput is the primary focus of the bit-rate selection algorithms. Due to the uncertainty in the channel quality, it is a challenge to make the correct decision so as to minimize the wastage of network resources and achieve …

Dynamic Push And Pull Strategy Based On Data Interpolation For Web Sensor Networks, Rohita Mohan

Computer Science and Engineering Theses - Archive

Sensor Web, a new trend has been developed recently to effectively network large scale deployed heterogeneous sensors with Internet to make sensor data discoverable, accessible and controllable via World Wide Web. Since sensor nodes are highly resource constrained, continuous back hauling of a large amount of data is not feasible. In this paper, we propose a dynamic push/pull service architecture where sensory quality is dynamically monitored and controlled. The architecture is implemented in a web proxy residing at the gateway of the network. As data is being pushed continuously from the network for effective sketching of the sensing field, interpolation …

Combustion Synthesis And Doping Of Titanium Dioxide, Walter Alexander Morales

Chemistry & Biochemistry Theses - Archive

A novel combustion technique was used for the preparation and doping of titanium dioxide (TiO2). This metal oxide of titanium is a large band gap semiconductor (3.0 - 3.2 eV) that primarily absorbs in the ultraviolet region of the electromagnietic spectrum. However, the combustion synthesized TiO2 (CS-TiO2) prepared here, presented a shift in the absorption of light to the visible region of the spectrum and a high photocatalytic activity toward the reduction of Cr(VI). The final product was characterized using X-ray powder difraction (XRD), difuse reectance spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Comparison to a commercial …

Qualitative Behavior Of Dynamical Vector Fields, Roger Dale Kirby

Mathematics Dissertations - Archive

Differential Equations come in two classes, deterministic and stochastic. The first part of this analysis establishes the stable properties of the set of all trajectories converging on a critical point in the real plane defined by two distinct negative eigenvalues. Also in the deterministic class I offer a method for finding closed-form primitives for a great variety of differential forms, through a reduction process facilitated by a Lyapunov-type Energy function. Many of these forms lie in classes which heretofore have not been shown to be solvable in closed form. The last part of this work outlines the appropriate procedures for …

Aligning Paradigms, Standards, And Assessment: A Higher-Education Application For Instruction In Science And Mathematics, Vikki K. Collins, Donna E. Pascoe, Martha C. Hall, H. Marguerite Yates

Perspectives In Learning

Disciplines of science and mathematics are essential for 21st century life and progress of our nation. To strengthen the effectiveness of education in the state of Georgia and to address emerging and enduring issues in 21st century life, the state adopted Georgia Performance Standards. To meet the standards of science and mathematics in Georgia classrooms, programs of teacher preparation and educational leadership in higher education institutions across the state must support and develop pre-service and in-service teachers and leaders able to effectively incorporate standards and assessment consistent with this paradigm shift. Student leadership teams at Columbus State University were instructed …

A Framework For Improving The Performance Of Application Servers In Next Generation Networks (Ngns), Sumantra R. Kundu

Computer Science and Engineering Dissertations - Archive

Next generation networks (NGNs) such as IP Multimedia Subsystem (IMS) are completely built on the Internet Protocol (IP) suite. This has made IP the de facto standard for data networking, voice over IP (VoIP), and media rich applications such as streaming multimedia, ringtones, multi-player gaming, and high-definition video conferencing for remote interaction. A primary feature of such converged networks is that they use the same IP-based network for simultaneously delivering voice, video, and data. Such services are provided on application servers built using industry standard Advanced Telecom Computing Architecture (ATCA) based blade computing units with various flavors of commodity open …

Aircraft Routing In The Presence Of Hazardous Weather, Joseph Michael Prete

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

Thermally Driven Defect Formation And Blocking Layers At Metal-Zno Interfaces, H. L. Mosbacker, C. Zgrabik, M. J. Hetzer, A. Swain, David C. Look, G. Cantwell, J. Zhang, J. J. Song, L. J. Brillson

Physics Faculty Publications

The authors used depth-resolved cathodoluminescence spectroscopy and current-voltage measurements to probe the temperature-dependent formation of native point defects and reaction layers at metal-ZnO interfaces and their effect on transport properties. These results identify characteristic defect emissions corresponding to metal-Zn alloy versus oxide formation. Au alloys with Zn above its eutectic temperature, while Ta forms oxide blocking layers that reduce current by orders of magnitude at intermediate temperatures. Defects generated at higher temperatures and/or with higher initial defect densities for all interfaces produce Ohmic contacts. These reactions and defect formation with annealing reveal a thermodynamic control of blocking versus Ohmic contacts.

Catalog, 2007-2008, Roger Williams University

Catalogs

No abstract provided.

Voices Echoing The Past: 'I Decided To Do Teaching Because Of The Teacher That I Had.' Thirteen Female Secondary Entry-Level Teachers Candidates Teaching Not Only What But Also How They Were Taught, Steven S. Sexton

Australian Journal of Teacher Education

This paper reports on a study that sought to uncover and explore the beliefs female secondary pre-service teachers held about teaching and being the teacher as they entered into their teacher education programs. The results indicated that for the participating teacher candidates it was their prior teachers in their intended subject who most informed how they saw themselves in the role as the teacher. Specifically, those secondary teachers who sought critical thinking in them as students impacted upon this teacher-role identity the most. Implications highlight the lack of research on females in secondary education and the importance in-service teachers play …

Homework: A Nightly Ritual Beginning In The Elementary Grades, Ann-Marie N. Skaggs

Dissertations, Masters Theses, Capstones, and Culminating Projects

Homework has become an accepted staple within education in the United States. However, little is acknowledged regarding the influences homework has on students. The purpose of this extended literature review is to look at the influences of homework on students in the elementary grades. The following research on homework was found through books, peer-reviewed journal articles, government reports, magazine articles, and interviews. Within the research, educational, socioeconomic, and parental factors show the largest influence, both positive and negative toward homework. The author discusses future implications to better improve homework's influence on students in the elementary grades. These implications include a …

An Economy With Personal Currency: Theory And Experimental Evidence, Martin Angerer, Juergen Huber, Martin Shubik, Shyam Sunder

Cowles Foundation Discussion Papers

Is personal currency issued by participants sufficient to operate an economy efficiently, with no outside or government money? Sahi and Yao (1989) and Sorin (1996) constructed a strategic market game to prove that this is possible. We conduct an experimental game in which each agent issues her personal IOUs, and a costless efficient clearinghouse adjusts the exchange rates among them so the markets always clear. The results suggest that if the information system and clearing are so good as to preclude moral hazard, any form of information asymmetry, and need for trust, the economy operates efficiently at any price level …

Three Minimal Market Institutions With Human And Algorithmic Agents: Theory And Experimental Evidence, Juergen Huber, Martin Shubik, Shyam Sunder

Cowles Foundation Discussion Papers

We define and examine the performance of three minimal strategic market games (sell-all, buy-sell, and double auction) in laboratory relative to the predictions of theory. Unlike open or partial equilibrium settings of most other experiments, these closed exchange economies have limited amounts of cash to facilitate transactions and include feedback. General equilibrium theory, since it abstracts away from market mechanisms and has no role for money or credit, makes no predictions about how the paths of convergence to the competitive equilibrium may differ across alternative mechanisms. Introduction of markets and money as carriers of process creates the possibility of motion. …

Three Minimal Market Institutions With Human And Algorithmic Agents: Theory And Experimental Evidence, Juergen Huber, Martin Shubik, Shyam Sunder

Cowles Foundation Discussion Papers

We define and examine three minimal market games (sell-all, buy-sell, and double auction) in the laboratory relative to the predictions of theory. These closed exchange economies have some cash to facilitate transactions, and include feedback. The experiment reveals that (1) the competitive general equilibrium (CGE) and non-cooperative (NCE) models are reasonable anchors to locate most but not all the observed outcomes of the three market mechanisms; (2) outcomes tend to get closer to CGE predictions as the number of players increases; (3) prices and allocations in double auctions deviate persistently from CGE predictions; (4) the outcome paths across the three …

Geostatistical And Stochastic Study Of Flow And Tracer Transport In The Unsaturated Zone At Yucca Mountain, Ming Ye, Feng Pan, Xiaolong Bill Hu, Jianting Zhu, Amy J. Smiecinski

Publications (YM)

Yucca Mountain has been proposed by the U.S. Department of Energy as the nation’s long-term, permanent geologic repository for spent nuclear fuel or high-level radioactive waste. The potential repository would be located in Yucca Mountain’s unsaturated zone (UZ), which acts as a critical natural barrier delaying arrival of radionuclides to the water table. Since radionuclide transport in groundwater can pose serious threats to human health and the environment, it is important to understand how much and how fast water and radionuclides travel through the UZ to groundwater. The UZ system consists of multiple hydrogeologic units whose hydraulic and geochemical properties …

Report Of The Task Force On Distance Learning Policy And Practice, John Jay College Of Criminal Justice, John Jay College Of Criminal Justice - Task Force On Distance Learning Policy And And Practice

Reports and Publications from John Jay College

The Task Force has generally concluded that distance learning initiatives should only go forward with the full commitment of the college's leadership, made real by dedicated resources and personnel, and carried forward by organizational structures and policies designed to best deliver online education.

The Task Force surveyed John Jay faculty, students and administrators about their experiences with online learning at the college, finding an acceptance of distance learning and an anticipation of its expansion. The competitive landscape was surveyed as well, identifying a large number of institutions in New York and across the country 'that offer degrees in criminal justice, …

An Update Of The Regional Growth Model For Large And Mid-Size U.S. Metropolitan Areas: Northeast Ohio Dashboard Indicators, Ziona Austrian, Iryna Lendel, Afia Yamoah

All Maxine Goodman Levin School of Urban Affairs Publications

No abstract provided.

Will The Post 9/11 World Be A Post-Tort World?, George W. Conk

Penn State Law Review (2003 - Present)

No abstract provided.

Local Approximations For Branching Particle Systems, Vladimir Vinogradov

Communications on Stochastic Analysis

No abstract provided.

Anwendung Von Interferenz- Und Ir-Mikroskopie Zur Charakterisierung Und Untersuchung Des Stofftransportes In Nanoporösen Materialien, Lars Heinke, Christian Chmelik, Pavel Kortunov, Sergey Vasenkov, Douglas M. Ruthven, Dhananjai B. Shah, Jörg Kärger

Chemical & Biomedical Engineering Faculty Publications

Die Anwendung der Interferenz-Mikroskopie bedeutet einen entscheidenden Durchbruch in der Untersuchung des Stofftransports von Gastmolekülen in nanoporösen Wirtsmaterialien. Diese Technik ermöglicht die Beobachtung der zeitaufgelösten intrakristallinen Konzentrationsprofile, die durch eine Änderung des umgebenden Gasdruckes entstehen. Dieser Ansatz wurde zur Untersuchung von Adsorptions- und Desorptionsprozessen in verschiedenen Zeolithsystemen verwendet. Die Vorteile dieser Technik, vor allem wenn sie mit Infrarotabsorptionsmessungen kombiniert wird, werden an Hand der experimentellen Resultate des Methanol-in-Ferrierit-Systems illustriert.

Periodic Properties Of User Mobility And Access-Point Popularity, Minkyong Kim, David Kotz

Dartmouth Scholarship

Understanding user mobility and its effect on access points (APs) is important in designing location-aware systems and wireless networks. Although various studies of wireless networks have provided useful insights, it is hard to apply them to other situations. Here we present a general methodology for extracting mobility information from wireless network traces, and for classifying mobile users and APs. We used the Fourier transform to reveal important periods and chose the two strongest periods to serve as parameters to a classification system based on Bayes' theory. Analysis of 1-month traces shows that while a daily pattern is common among both …