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Articles 11431 - 11460 of 12197
Full-Text Articles in Physical Sciences and Mathematics
Development Of A Detached Vital Sign Home Monitoring Management System, Anderson John
Development Of A Detached Vital Sign Home Monitoring Management System, Anderson John
Computer Science and Engineering Theses
Patients coping with chronic illnesses are often inconvenienced with routine doctor visits for the sole purpose of conducting basic vital sign monitoring. Such visits tend to be disruptive, and are more so when the patient requires a lengthy commute or has a mobility disability. As technology progresses, advances in low powered integrated circuits and network connectivity has opened the doors to a new world of remote patient monitoring. This thesis explores the possibility of using low powered technology to develop a patient monitoring system that's completely detached, thus allowing patients to move around their homes while the monitoring continues. We …
An Experiment In Developing Small Mobile Phone Applications Comparing On-Phone To Off-Phone Development, Tuan Anh Nguyen
An Experiment In Developing Small Mobile Phone Applications Comparing On-Phone To Off-Phone Development, Tuan Anh Nguyen
Computer Science and Engineering Theses
TouchDevelop represents a radically new mobile application development model, as TouchDevelop enables mobile application development on a mobile device. I.e., with TouchDevelop, the task of programming say a Windows Phone is shifted from the desktop computer to the mobile phone itself. We describe a first experiment on independent, non-expert subjects to compare programmer productivity using TouchDevelop vs. using a more traditional approach to mobile application development.
Prominent Streaks Discovery On Blog Articles, Jijo John Philip
Prominent Streaks Discovery On Blog Articles, Jijo John Philip
Computer Science and Engineering Theses
We are surrounded by data in various forms such as instant messages, Twitter tweets, Facebook status updates, news, media, blogs and much more. Extracting meaning from such a massive collection of unstructured data would lead to interesting stories. Examples of such stories can be ``\emph{Who was the most popular actor in a particular month}''or ``\emph{Which diseases were people most concerned about in year 2008}''. In this thesis, we propose to discover popular entities mentioned in blog articles based on the concept of prominent streak. Given a sequence of values for a named entity (e.g., a person, a place, etc.), where …
On Feasibility Of Fingerprinting Wireless Sensor Nodes Using Physical Properties, Xiaowei Mei
On Feasibility Of Fingerprinting Wireless Sensor Nodes Using Physical Properties, Xiaowei Mei
Computer Science and Engineering Theses
Fingerprinting wireless devices using physical properties has been recently suggested as an alternative for device identification and authentication. It has been found that the clock skew caused by the frequency discrepancy of the quartz crystals in different devices can be used as a reliable source for fingerprinting. Researchers have studied the application of the clock skew-based fingerprinting in sensor networks and claimed that it can detect fake identities, wormholes, and node replicas. However, the study in this paper draws a completely opposite conclusion, i.e., the clock skew of sensor nodes can be easily forged by adversaries to evade the detection. …
Pushpop: A Card Game, Vishal Subramani
Pushpop: A Card Game, Vishal Subramani
Computer Science and Engineering Theses
In this thesis we have designed and implemented an Android card game called PushPop. This game is meant to stimulate the interest of kids in math learning. The Android game has cards with mathematical signs instead of the traditional suits. To reach the goal kids have to perform a lot of mathematical operations which helps them learn maths in a fun and effective way. A study was made to classify PushPop into the various games under the research umbrella of Game Theory. After the analysis we conclude that PushPop is a non-co-operative, symmetric, non-zero sum, simultaneously and imperfect information game …
Comparing Web Application Scanners For Xss Attacks, Dengfeng Xia
Comparing Web Application Scanners For Xss Attacks, Dengfeng Xia
Computer Science and Engineering Theses
As software industry is paying increasing attention to web application security, various testing tools with black box testing feature have been developed. To better evaluate their performance, researchers have made efforts in several ways. Since XSS attack is one of the major attacks which can bring severe damages to victims, it is meaningful to pay specific attention to its testing process. However, many web application scanner evaluation projects make comparisons about various vulnerability types, and they are not dedicated to XSS issues enough. Their evaluations either use vulnerable applications in real life, or use test cases created by themselves, and …
Shaping Network Topology For Privacy And Performance, Md Monjurul Hasan
Shaping Network Topology For Privacy And Performance, Md Monjurul Hasan
Computer Science and Engineering Theses
Anonymity systems provide privacy for Internet communication and are becoming popular. Unfortunately, users experience slow Internet connection through existing systems because paths used to route traffic are selected randomly without considering latency between nodes. In our work, we aim to design a better approach for selecting paths in anonymity systems with improved performance and without sacrificing privacy. We consider stratified topologies for our design where nodes are divided into three hops. We propose a scheme to build restricted network topologies on top of a stratified topology that maximizes throughput. First, we use Tabu Search to build latency-aware stratified restricted topologies …
A Novel Scheme For Contact Predictions In Opportunistic Networks, Sujoy Kumar Bhattacharya
A Novel Scheme For Contact Predictions In Opportunistic Networks, Sujoy Kumar Bhattacharya
Computer Science and Engineering Theses
In the opportunistic network (ON) paradigm information is exchanged between two devices as they encounter each other. For such information exchange to take place the devices must know about the presence of other devices in the neighborhood. A very fundamental problem in ON is to predict the occurrence of a future opportunistic contact which is otherwise highly dynamic and unreliable. An accurate predictor which takes into account the long time history can benefit from multiple objectives. Such a predictor switches to the data transfer mode in anticipation of a contact. Also it maximizes the number of opportunistic contacts while spending …
Control Framework Dynamic Walking Of A Bipedal Robot, Kishan Kumar Bhongale Prabhakar Prasad
Control Framework Dynamic Walking Of A Bipedal Robot, Kishan Kumar Bhongale Prabhakar Prasad
Computer Science and Engineering Theses
Despite significant progress in recent years, the capabilities of today's Humanoid robots still lack behind the walking abilities of humans in terms of competence, robustness, flexibility, and speed. Furthermore, unknown environmental conditions and related constraints imposed on the robot significantly increase the complexity of locomotion control and decision making for such systems, easily making planning-based approaches intractable. Part of the reason for this is that the control of a humanoid encompasses observation, processing the observed data, and decision making in terms of locomotion gait and body pose parameters. This key information derived from observations and internal robot information finally allows …
Hydrological Visualization And Analysis System And Drought Related Feature Selection Based On Sectional Correlation Measurement, Piraporn Jangyodsuk
Hydrological Visualization And Analysis System And Drought Related Feature Selection Based On Sectional Correlation Measurement, Piraporn Jangyodsuk
Computer Science and Engineering Theses
Because of the larger data storage and the faster computational power, computer can process and store much finer resolution data. Aside from data analysis, data visualization is also an important task to understand the data. In this work, the Hydrological Visualization and Analysis System is developed to help both hydrologists and local people view and examine the high resolution hydrological data. Then, this data is analyzed to determine which variables are related to the change of drought condition in Arlington, Texas. A new correlation measurement method called sectional correlation is proposed and used as an objective function of the drought …
Automatic Scheduler: A New Approach For Scheduling Rides, Amey Sudhir Bhalerao
Automatic Scheduler: A New Approach For Scheduling Rides, Amey Sudhir Bhalerao
Computer Science and Engineering Theses
Scheduling plays an important role in a person's life. Even computers use the concept of scheduling when it comes to processing jobs. Scheduling is important in cases normally when there is large data to process and manual scheduling is not an easy option to go for. A new concept of developing a scheduler has been discussed in this thesis. The algorithm was designed keeping in mind the Para Transit agencies that operate on federal funds to provide cheap transport service to the clients. The algorithm presented here is developed with the intention to reduce the delay faced by the client …
Dynamic Cache Reconfiguration For Energy Optimization In Chip Multiprocessors, Gaurav Puri
Dynamic Cache Reconfiguration For Energy Optimization In Chip Multiprocessors, Gaurav Puri
Computer Science and Engineering Theses
Cache reconfiguration for chip multiprocessors (CMP) in order to reduce energy consumption is a challenging research problem. This thesis presents a dynamic scheme for level one cache design where the processing core can dynamically switch to a lower energy configuration. The proposed scheme is based on a heuristic that can either be executed as part of the firmware or implemented in hardware with very low additional overhead. The heuristic functions periodically after a pre-defined fixed interval for each processing core. The heuristic first examines the statistics calculated over the previous intervals and then switches the cache to an improved configuration …
Querying Entity-Relationship Graphs By Example Tuples: Experimental Evaluation And User Study, Mahesh Gupta
Querying Entity-Relationship Graphs By Example Tuples: Experimental Evaluation And User Study, Mahesh Gupta
Computer Science and Engineering Theses
The World Wide Web today has evolved into a rich repository of entities where many knowledge bases containing entity-related information are directly available. Such knowledge bases are often in the form of entity-relationship graphs. To query entity-relationship graphs, users need to provide input entities, attributes and relationships by complex query graphs. To improve the usability of graph database systems, we study a novel mechanism that queriesentity-relationship graphs by example tuples. It allows users to express a query in the form of one or more tuples consisting of entities. The underlying query system automatically builds aquery graph based on the example …
Charge Delocalization In Self-Assembled Mixed-Valence Aromatic Cation Radicals, Tushar Navale, Khushabu Thakur, Vijay Vyas, Shriya Wadumethrige, Ruchi Shukla, Sergey V. Lindeman, Rajendra Rathore
Charge Delocalization In Self-Assembled Mixed-Valence Aromatic Cation Radicals, Tushar Navale, Khushabu Thakur, Vijay Vyas, Shriya Wadumethrige, Ruchi Shukla, Sergey V. Lindeman, Rajendra Rathore
Chemistry Faculty Research and Publications
The spontaneous assembly of aromatic cation radicals (D+•) with their neutral counterpart (D) affords dimer cation radicals (D2+•). The intermolecular dimeric cation radicals are readily characterized by the appearance of an intervalence charge-resonance transition in the NIR region of their electronic spectra and by ESR spectroscopy. The X-ray crystal structure analysis and DFT calculations of a representative dimer cation radical (i.e., the octamethylbiphenylene dimer cation radical) have established that a hole (or single positive charge) is completely delocalized over both aromatic moieties. The energetics and the geometrical considerations for the formation …
Networking And Security Solutions For Vanet Initial Deployment Stage, Baber Aslam
Networking And Security Solutions For Vanet Initial Deployment Stage, Baber Aslam
Electronic Theses and Dissertations
Vehicular ad hoc network (VANET) is a special case of mobile networks, where vehicles equipped with computing/communicating devices (called "smart vehicles") are the mobile wireless nodes. However, the movement pattern of these mobile wireless nodes is no more random, as in case of mobile networks, rather it is restricted to roads and streets. Vehicular networks have hybrid architecture; it is a combination of both infrastructure and infrastructure-less architectures. The direct vehicle to vehicle (V2V) communication is infrastructure-less or ad hoc in nature. Here the vehicles traveling within communication range of each other form an ad hoc network. On the other …
Turtle Cam: Live Multimedia Interaction For Engaging Potential Visitor Population To Canaveral National Seashore, Brian Alfred Tortorelli
Turtle Cam: Live Multimedia Interaction For Engaging Potential Visitor Population To Canaveral National Seashore, Brian Alfred Tortorelli
Electronic Theses and Dissertations
This project expands the outreach of the Canaveral National Seashore to its visitors, potential visitors, and virtual visitors through its goals in conservancy and preservation of its natural resources. This paper is involved with the current iteration of a series of digital media projects, the Sea Turtle Nest Camera, also known as, Turtle Cam. It details how and why this project was designed to be an ongoing initiative to assist in those goals.
Characterization And Application Of Isolated Attosecond Pulses, Michael Chini
Characterization And Application Of Isolated Attosecond Pulses, Michael Chini
Electronic Theses and Dissertations
Tracking and controlling the dynamic evolution of matter under the influence of external fields is among the most fundamental goals of physics. In the microcosm, the motion of electrons follows the laws of quantum mechanics and evolves on the timescale set by the atomic unit of time, 24 attoseconds. While only a few time-dependent quantum mechanical systems can be solved theoretically, recent advances in the generation, characterization, and application of isolated attosecond pulses and few-cycle femtosecond lasers have given experimentalists the necessary tools for dynamic measurements on these systems. However, pioneering studies in attosecond science have so far been limited …
Assessment Of Molecular Interactions Via Magnetic Relaxation: A Quest For Inhibitors Of The Anthrax Toxin, Oscar Santiesteban
Assessment Of Molecular Interactions Via Magnetic Relaxation: A Quest For Inhibitors Of The Anthrax Toxin, Oscar Santiesteban
Electronic Theses and Dissertations
Anthrax is severe disease caused by the gram-positive Bacillus anthracis that can affect humans with deadly consequences. The disease propagates via the release of bacterial spores that can be naturally found in animals or can be weaponized and intentionally released into the atmosphere in a terrorist attack. Once inhaled, the spores become activated and the anthrax bacterium starts to reproduce and damage healthy macrophages by the release of the anthrax toxin. The anthrax toxin is composed of three virulent factors: (i) anthrax protective antigen (APA), (ii) anthrax lethal factor (ALF), and (iii) anthrax edema factor (AEF) that work in harmony …
A Study Of Localization And Latency Reduction For Action Recognition, Syed Zain Masood
A Study Of Localization And Latency Reduction For Action Recognition, Syed Zain Masood
Electronic Theses and Dissertations
The success of recognizing periodic actions in single-person-simple-background datasets, such as Weizmann and KTH, has created a need for more complex datasets to push the performance of action recognition systems. In this work, we create a new synthetic action dataset and use it to highlight weaknesses in current recognition systems. Experiments show that introducing background complexity to action video sequences causes a significant degradation in recognition performance. Moreover, this degradation cannot be fixed by fine-tuning system parameters or by selecting better feature points. Instead, we show that the problem lies in the spatio-temporal cuboid volume extracted from the interest point …
Low Voltage Blue Phase Liquid Crystal Displays, Linghui Rao
Low Voltage Blue Phase Liquid Crystal Displays, Linghui Rao
Electronic Theses and Dissertations
From cell phones, laptops, desktops, TVs, to projectors, high reliability LCDs have become indispensable in our daily life. Tremendous progress in liquid crystal displays (LCDs) has been made after decades of extensive research and development in materials, device configurations and manufacturing technology. Nowadays, the most critical issue on viewing angle has been solved using multidomain structures and optical film compensation. Slow response time has been improved to 2-5 ms with low viscosity LC material, overdrive and undershoot voltage, and thin cell gap approach. Moving image blur has been significantly reduced by impulse driving and frame insertion. Contrast ratio in excess …
Detecting, Tracking, And Recognizing Activities In Aerial Video, Vladimir Reilly
Detecting, Tracking, And Recognizing Activities In Aerial Video, Vladimir Reilly
Electronic Theses and Dissertations
In this dissertation, we address the problem of detecting humans and vehicles, tracking them in crowded scenes, and finally determining their activities in aerial video. Even though this is a well explored problem in the field of computer vision, many challenges still remain when one is presented with realistic data. These challenges include large camera motion, strong scene parallax, fast object motion, large object density, strong shadows, and insufficiently large action datasets. Therefore, we propose a number of novel methods based on exploiting scene constraints from the imagery itself to aid in the detection and tracking of objects. We show, …
Computational Methods For Analyzing Rna Folding Landscapes And Its Applications, Yuan Li
Computational Methods For Analyzing Rna Folding Landscapes And Its Applications, Yuan Li
Electronic Theses and Dissertations
Non-protein-coding RNAs play critical regulatory roles in cellular life. Many ncRNAs fold into specific structures in order to perform their biological functions. Some of the RNAs, such as riboswitches, can even fold into alternative structural conformations in order to participate in different biological processes. In addition, these RNAs can transit dynamically between different functional structures along folding pathways on their energy landscapes. These alternative functional structures are usually energetically favored and are stable in their local energy landscapes. Moreover, conformational transitions between any pair of alternate structures usually involve high energy barriers, such that RNAs can become kinetically trapped by …
Defect Studies In Cu-Based P-Type Transparent Conducting Oxides, Fnu Ameena
Defect Studies In Cu-Based P-Type Transparent Conducting Oxides, Fnu Ameena
Physics Dissertations
Among other intrinsic open-volume defects, copper vacancy (VCu) has been theoretically identified as the major acceptor in p-type Cu-based semiconducting transparent oxides, which has potential as low-cost photovoltaic absorbers in semi-transparent solar cells. A series of positron annihilation experiments with pure Cu, Cu2O, and CuO presented strong presence of VCu and its complexes in the copper oxides. The lifetime data also showed that the density of VCu was becoming higher as the oxidation state of Cu increased which was consistent with the decrease in the formation energy of VCu. Doppler broadening measurements further indicated that electrons with low momentum made …
Selected Studies Of Celestial Dynamics And Habitability Of Extra Solar Planetary Systems, Billy Lee Quarles
Selected Studies Of Celestial Dynamics And Habitability Of Extra Solar Planetary Systems, Billy Lee Quarles
Physics Dissertations
Planetary science in various forms has become interwoven into human culture during all of known human history. The need and desire to expand our horizons has brought humans from basic forms of observation to the development of space satellites that have (in)directly observed other worlds. A major feat of this enterprise during the last half century has been the develop of numerical tools and theories to determine the orbital stability of multiple objects orbiting a central body. Two special cases of the gravitational N body problem (N = 3,4) have been investigated along with the development of a stability criterion …
Silicon Carbide At Nanoscale: Finite Single-Walled To "Infinite" Multi-Walled Tubes, Kapil Adhikari
Silicon Carbide At Nanoscale: Finite Single-Walled To "Infinite" Multi-Walled Tubes, Kapil Adhikari
Physics Dissertations
A systematic ab initio study of silicon carbide (SiC) nanostructures, especially finite single-walled, infinite double- and multi-walled nanotubes and nanocones is presented. Electronic and structural properties of all these nanostructures have been calculated using hybrid density functionals (B3LYP and PBE0) as implemented in the GAUSSIAN 03/09 suite of software. The unusual dependence of band gap of silicon carbide nanotubes (SiCNT) has been explained as a direct consequence of curvature effect on the ionicity of the bonds. The study of fullerene hemisphere capped, finite SiC nanotubes indicates that the carbon-capped SiC nanotubes are energetically more preferred than silicon-capped finite or hydrogen …
Quantum Modeling Of Dark Matter In Galactic Halos, Shane Charles Spivey
Quantum Modeling Of Dark Matter In Galactic Halos, Shane Charles Spivey
Physics Dissertations
Eighty years after its initial discovery, the nature of dark matter remains a mystery. Contrary to observational evidence, simulations of dark matter halos predict cuspy density profiles and an abundant population of dwarf galaxies. Increasingly refined measurements of the dark matter halos in galaxies reveal a large variety of halo shapes and sizes, and so far no universal profile has been able to incorporate them all. Among the numerous dark matter candidates, models of so-called quantum cold dark matter (QCDM) have the unique potential to address the many disparities between theory and observation.QCDM postulates that dark matter is composed primarily …
Controls On Ecosystem Carbon Dioxide Exchange In Short- And Long-Hydroperiod Florida Everglades Freshwater Marshes, Jessica L. Schedlbauer, Jay W. Munyon, Steven F. Oberbauer, Evelyn E. Gaiser, Gregory Starr
Controls On Ecosystem Carbon Dioxide Exchange In Short- And Long-Hydroperiod Florida Everglades Freshwater Marshes, Jessica L. Schedlbauer, Jay W. Munyon, Steven F. Oberbauer, Evelyn E. Gaiser, Gregory Starr
FCE LTER Journal Articles
Although freshwater wetlands are among the most productive ecosystems on Earth, little is known of carbon dioxide (CO2) exchange in low latitude wetlands. The Everglades is an extensive, oligotrophic wetland in south Florida characterized by short- and long-hydroperiod marshes. Chamber-based CO2 exchange measurements were made to compare the marshes and examine the roles of primary producers, seasonality, and environmental drivers in determining exchange rates. Low rates of CO2 exchange were observed in both marshes with net ecosystem production reaching maxima of 3.77 and 4.28 μmol CO2 m−2 s−1 in short- and long-hydroperiod marshes, …
Topspin Networks In Loop Quantum Gravity, Christopher L. Duston
Topspin Networks In Loop Quantum Gravity, Christopher L. Duston
Physics Faculty Publications
We discuss the extension of loop quantum gravity to topspin networks, a proposal which allows topological information to be encoded in spin networks. We will show that this requires minimal changes to the phase space, C*-algebra and Hilbert space of cylindrical functions. We will also discuss the area and Hamiltonian operators, and show how they depend on the topology. This extends the idea of 'background independence' in loop quantum gravity to include topology as well as geometry. It is hoped this work will confirm the usefulness of the topspin network formalism and open up several new avenues for research into …
Ensuring Distributed Accountability For Data Sharing In The Cloud, Smitha Sundareswaran, Anna Squicciarini, Dan Lin
Ensuring Distributed Accountability For Data Sharing In The Cloud, Smitha Sundareswaran, Anna Squicciarini, Dan Lin
Computer Science Faculty Research & Creative Works
Cloud computing enables highly scalable services to be easily consumed over the Internet on an as-needed basis. a major feature of the cloud services is that users' data are usually processed remotely in unknown machines that users do not own or operate. While enjoying the convenience brought by this new emerging technology, users' fears of losing control of their own data (particularly, financial and health data) can become a significant barrier to the wide adoption of cloud services. to address this problem, in this paper, we propose a novel highly decentralized information accountability framework to keep track of the actual …
4d-Ct Lung Registration And Its Application For Lung Radiation Therapy, Yugang Min
4d-Ct Lung Registration And Its Application For Lung Radiation Therapy, Yugang Min
Electronic Theses and Dissertations
Radiation therapy has been successful in treating lung cancer patients, but its efficacy is limited by the inability to account for the respiratory motion during treatment planning and radiation dose delivery. Physics-based lung deformation models facilitate the motion computation of both tumor and local lung tissue during radiation therapy. In this dissertation, a novel method is discussed to accurately register 3D lungs across the respiratory phases from 4D-CT datasets, which facilitates the estimation of the volumetric lung deformation models. This method uses multi-level and multi-resolution optical flow registration coupled with thin plate splines (TPS), to address registration issue of inconsistent …