Digital Commons Network^™

Tide-Influenced Contaminant Transport In Coastal Aquifers, Yong Peng

Dissertations

Coastal aquifers are distinguished from other aquifers because of tidal effects which cause complicated groundwater flow and contaminant transport phenomena in regions immediately adjacent to the coast. This study is designed to address the significance of tidal influence on contaminant transport by focusing on one-dimensional homogeneous coastal aquifers.

This study formulates a conceptual model and corresponding flow and transport equations, analyzes coastal boundary conditions, solves numerically the transport equation, and uses experiments to verify the numerical results.

Results of numerical and experimental studies conclude that tides can have a significant impact on contaminant transport, especially when under unconfined conditions, subject …

The Testing Of Semiconductor-Based Adsorption Modified Photosensitive Sensors For Their Response To A Volatile Organic Compound, Oxygen, Humidity, And Heating, Roberta Rosty

Dissertations

Two thin-film sensors, composed of different thicknesses (approximately 0.5 microns and 4.5 microns) of a cadmium sulfide layer coated with Rhodamine B fluorescent dye on a glass substrate, were tested for change in photoconductivity due to exposure to different concentrations of gaseous organic molecules in the parts-per-million (ppm) range.

It was theorized that the gaseous organic molecules would adsorb to the dyed semiconductor surface and that some energy would be transferred to the adsorbed analyte rather than to the cadmium sulfide semiconductor layer through the dye, thereby decreasing the photoconductivity of the surface in an amount proportional to the analyte …

Investigation Of Static And Dynamic Enhancement Of Laminar Natural Convection Cooling Of Electronics, Laurie Ann Florio

Dissertations

With the proliferation of consumer electronics devices and the increasingly demanding thermal control requirements for such devices, more effective and efficient means of cooling electronics are needed. The feasibility of three alternative approaches to enhancing pure natural convection cooling of electronics is investigated in the current research. The three static or dynamic methods investigated are alternate cross-flow passages, the strategic placement of transversely oscillating plates near the heat sources and a combined method using both the cross-flow passages and the strategically placed oscillating plates. These cooling methods are intended to operate in the regime for which natural convection cooling is …

Scattering Matrix Analysis Of Photonic Crystals, Valeriy Lukyanov

Dissertations

Using a scattering matrix approach we analyze and study the scattering and transmission of waves through a two-dimensional photonic crystal which consists of a periodic array of parallel rods with circular cross sections. Without making any assumptions about normal incidence, single mode propagation, and sufficient inter-scatter separation in the direction of propagation, we show how to compute the transmission and reflection coefficients of these periodic structures. The method is based on the computation of a generalized scattering matrix for one column of the periodic structure.

We also develop an analytical method to analyze and to study the scattering and transmission …

An Optic Fiber Sensor For Partial Discharge Acoustic Detection, Xiaodong Wang

Dissertations

Partial discharge (PD) is a very common problem in operating power transformers and is one of the factors that could lead to failure of power transformers, leading to power outage and expensive repairs. The acoustic wave induced by PD can be measured and used for monitoring, diagnosing, and locating potential failures in power transformers.

The effects of the temperature of the transformer and transformer oil are one of the very important parameters in PD and these effects are investigated in detail. The Fast Fourier Transform (FF1') is used to synthesize the measured data and results show that for periodic PD …

Study Of Steganalysis Methods, Wen Chen

Theses

Steganography is the art and science of hiding the presence of conmunication by embedding secret message into digital images. The steganographic techniques can be applied in many areas. On one hand, people can benefit from their application. For example, they can be used for copyright protection. On the other hand, these techniques may be used by criminals or terrorists for malicious purposes. For example, terrorists may use the techniques to transmit the secret plan of terror attacks. Law enforcement and security authorities have concerns about such activities. It is necessary to devise the methods to detect steganographic systems. The detection …

Digital Libraries And Middleware Technology, Muhammad Umar Qasim

Theses

Digital libraries deliver personalized knowledge directly to their users, without being restricted to the contents of a physical library. In a digital library information from any online source can be managed and shared, making more knowledge available to users than before. The information sharing is achieved by integrating many autonomous heterogeneous systems available. The challenge is to provide users with the ability to transparently access digital library contents in spite of the heterogeneity among the information sources.

Research communities have proposed several approaches to accomplish the system integration in digital libraries. In this thesis, the working of currently employed approaches …

A Digital Signature And Watermarking Based Authentication System For Jpeg2000 Images, Rui Jing

Theses

In this thesis, digital signature based authentication system was introduced, which is able to protect JPEG2000 images in different flavors, including fragile authentication and semi-fragile authentication. The fragile authentication is to protect the image at code-stream level, and the semi-fragile is to protect the image at the content level.

The semi-fragile can be further classified into lossy and lossless authentication. With lossless authentication, the original image can be recovered after verification. The lossless authentication and the new image compression standard, JPEG2000 is mainly discussed in this thesis.

Data Feed Management Automation : An Empirical Approach, Dibyendu Majumder

Theses

This thesis proposes a framework for automation of data feed management and control. The framework can be classified into two broad areas i) building an ontology for a feed system and ii) developing a test suite, that is, a set of statistical models to analyze and diagnose feeds and formalize the results to feedback into the ontology. This thesis concentrates more on the latter and will only outline the course of action required for the former. Detailed descriptions of the statistical models that are part of the test suite are given and their strengths and weaknesses discussed. Practical results of …

Obtaining Optimal Data Length For Fmri Images, Vikram M. Natarajan

Theses

Interest in brain hemodynamics has led to a substantial increase in state of the art research within the field of functional Magnetic Resonance Imaging (fMRI). FMRI enables research to be conducted on brain mapping in healthy individuals, as well as in patient populations. The need for accurate functional images is required. The primary objective was the development of a method to determine the optimal number of time points required to obtain reliable activation maps. The second phase involved the development of a program, which enabled the conversion of functional magnetic resonance images to a format that the neurosurgeon's scanner could …

Next Generation Satellite Orbital Control System, Thomas Gerard Nowak

Theses

Selection of the correct software architecture is vital for building successful software-intensive systems. Its realization requires important decisions about the organization of the system and by and large permits or prevents a system's acceptance and quality attributes such as performance and reliability. The correct architecture is essential for program success while the wrong one is a formula for disaster.

In this investigation, potential software architectures for the Next Generation Satellite Orbital Control System (NG-SOCS) are developed from compiled system specifications and a review of existing technologies. From the developed architectures, the recommended architecture is selected based on real-world considerations that …

Instruction Of Throwing Events In Track And Field : An Historical Analysis, Marilyn Louise Coleman

Theses

Track and field throwing events (discus, javelin, hammer and shot put), originating in ancient Greece and pre-Medieval Ireland and Scotland, require complex physical interaction. An historical analysis of the features of traditional media which have been used as coaching tools in these events - books, video, audio, diagrams, photographs and hypertext - provides the foundation on which future multimedia tools can be developed.

Variables associated with effective coaching are based on technique, science, use of expert models, and motor learning theory. Training in these events is enhanced through the use of multimedia, a tool uniquely suited to the variables of …

Ambulatory Measurement Of Body Position, Swetha Vennamaneni

Theses

Ambulatory monitoring is playing an important role in the clinical and research field. In the modem era, physicians are showing much interest in measuring heart rate, blood pressure and many other physical and cardiac conditions and recording electrocardiogram (ECG, a popular technique for diagnosing heart related disease), while the patient is ambulatory. Heart rate, blood pressure and ECG waveform can change because of body position. In the case of the ECG, the changes caused by body position are can change the ST-T segment and also the QRS amplitude. The heart rate and blood pressure changes when there is a change …

2d Quantitative Structure Activity Relationship Modeling Of Methylphenidate Analogues Using Algorithm And Partial Least Square Regression, Noureen Wadhwaniya

Theses

Quantitative Structure-Activity Relationship (QSAR) analysis attempts to develop a predictive model of biological activity based on molecular descriptors. 2D QSAR uses descriptors, such as topological indices, that are independent of molecular conformation. A genetic algorithm - partial least squares (GA-PLS) approach was used to identify the molecular descriptors that correlate to the biological activity (binding affinity) of a set of 80 methylphenidate analogues and to construct a predictive model. The GA code was implemented using the fitness function (1-(n-1)(1-q²)/ (n - c)), where n is the number of compounds, c is the optimal number of components, and q …

Parameter Based Synthesis Of Sign Language, Amanda Irving

Theses

The primary objective of this project is to demonstrate synthesis of signs in American Sign Language with a finite number of parameters. The parameters in this method include 22 key locations, six location modifiers, six orientation indicators, 46 hand shapes, six predefined movements and seven possible end effectors. These parameters can be used in conjunction with a computer script and they maximize precision and versatility while minimizing development time and resources. The parameters for each sign are stored in an individual text file averaging approximately half a kilobyte.

The success of this project is demonstrated using UGS's Jack Software, Version …

Labview Controlled Study Of The Propagation Properties Of Ultrasound In Synthetic Fog Environment, Aparna Venkataraman

Theses

Diagnostic ultrasound employs pulsed, high frequency sound waves that are reflected back from body tissues and processed by ultrasound receivers to create characteristic images in varied applications such as cardiology, obstetrics and gynecology neurology and urology. Ultrasound intensity is primarily affected by the changes in acoustic impedance of the medium. Literature on ultrasound indicates that the propagation of ultrasound increases gradually as the density increases from air to water. Such studies have been confined to only the three states of matter and have never discussed a fog medium.

The primary objective of this thesis study was to design a system …

The Role Of University Participation In Integrated Coastal Zone Management : A Case Study Of The Ria De Aviero, Amie Barbosa Figueiredo

Theses

The purpose of this investigation is to examine the efforts of the Universidade de Aveiro to create a public participation process and provide information for the management of the Ria de Aveiro, a lagoon system, in Portugal. This thesis examines whether universities are effective as coordinators and facilitators of Integrated Coastal Zone Management (ICZM). The Universidade de Aveiro, through the European Union-ICZM Demonstration Programme, spearheaded two projects, MARIA and ESGIRA-Maria, in efforts towards moving forward with ICZM in the area. A framework was created and then applied through a series of pilot-projects. Examination of the results of these pilot projects …

Analysis Of Relationship Between Software Metrics And Process Models, Sadia Munir

Theses

This thesis studies the correlation between software process models and software metrics. To support our studies we have defined a Process - Metric Evaluation Framework and derived an evaluation template from it. The template served as a basic tool in studding the relationships between various process models, artifacts and software metrics.

We have evaluated a number of process models according to our template and have identified suitable software metrics. We have also recommended a root cause analysis approach at various points of the process models.

The suggested software metrics can be derived from various product and process artifacts. They can …

Scalable Wide Area Ad-Hoc Networking, Nithin Bose

Theses

The scalability problem of routing algorithms in Mobile Ad-hoc networks (MANET) has conventionally been addressed by introducing hierarchical architectures, clusters, and neighborhood zones. In all of these approaches, some nodes are assigned different routing related roles than others. Examples include cluster heads, virtual backbones and border nodes. The selection of these nodes on a fixed or dynamic basis adds complexity to the routing algorithm, in addition to placing significant demands on mobility and power consumption of these nodes. Furthermore, the scalability achieved with hierarchical architectures or partitions is limited.

This thesis demonstrates that location awareness can greatly aid in MANET …

Performance Evaluation Of Various Allocation Methods In A Heterogeneous Disk Array Architecture, Bogdan Alexandru Branzoi

Theses

Dataset attributes, such as data availability levels and access patterns, make their mapping to certain RAID levels more desirable than others. On the other hand, it is not economically viable for an installation to acquire multiple disk arrays to satisfy diverse data storage requirements. A Heterogeneous Disk Array (HDA) architecture is proposed, which allows device heterogeneity as well as RAID level heterogeneity. In other words, various disks of different types can be incorporated in a single HDA and multiple RAID schemes can coexist in the same array. The goal of this architecture is to utilize the resources of all its …

Njit 2005 Baseball Media Guide, New Jersey Institute Of Technology Athletic Department

Baseball

No abstract provided.

Njit Highlanders Women's Soccer 2005 Media Guide, New Jersey Institute Of Technology Athletic Department

Soccer - Women's

No abstract provided.

Njit Highlanders Men's Volleyball 2005 Media Guide, New Jersey Institute Of Technology Athletic Department

Volleyball - Men's

No abstract provided.

Njit Library Annual Report 2003-2004, Njit Libraries

Library Annual Reports

No abstract provided.

Njit Highlanders Tennis 2004-05 Media Guide, New Jersey Institute Of Technology Athletic Department

Tennis

No abstract provided.

Njit Highlanders Swimming & Diving 2004 Media Guide, New Jersey Institute Of Technology Athletic Department

Swimming and Diving

No abstract provided.

Njit Highlanders Women's Basketball 2004-05 Media Guide, New Jersey Institute Of Technology Athletic Department

Basketball - Women's

No abstract provided.

Njit Highlanders Men's Soccer 2004 Media Guide, New Jersey Institute Of Technology Athletic Department

Soccer - Men's

No abstract provided.

Pitchfork Bifurcations Of Invariant Manifolds, Jyoti Champanerkar

Dissertations

In a parameter dependent, dynamical system, when the qualitative structure of the solutions changes due to a small change in the parameter, the system is said to have undergone a bifurcation. Bifurcations have been classified on the basis of the topological properties of fixed points and invariant manifolds of dynamical systems. A pitchfork bifurcation in R is said to have occurred when a stable fixed point becomes unstable and two new stable fixed points, separated by the unstable fixed point come into existence.

In this thesis, a pitchfork bifurcation of an (in- 1)-dimensional invariant submani-fold of a dynamical system in …

Numerical Simulation Of Microwave Heating Of A Target With Temperature Dependent Electrical Properties In A Single-Mode Cavity, Hoa Kien Tran

Dissertations

This dissertation extends the work done by Hue and Kriegsmann in 1998 on microwave heating of a ceramic sample in a single-mode waveguide cavity. In that work, they devised a method combining asymptotic and numerical techniques to speed up the computation of electromagnetic fields inside a high-Q cavity in the presence of low-loss target. In our problem, the dependence of the electrical conductivity on temperature increases the complexity of the problem. Because the electrical conductivity depends on temperature, the electromagnetic fields must be recomputed as the temperature varies. We then solve the coupled heat equation and Maxwell's equations to determine …