Electrical and Computer Engineering Commons^™

College Of Engineering Senior Design Competition Spring 2011, University Of Nevada, Las Vegas

Fred and Harriet Cox Senior Design Competition Projects

Part of every UNLV engineering student’s academic experience, the senior design project stimulates engineering innovation and entrepreneurship. Each student in their senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. A capstone to the student’s educational career, the senior design project encourages the student to use everything learned in the engineering program to create a practical, real world solution to an engineering challenge.

The senior design competition helps focus the senior students in increasing the quality and potential for commercial application for their design projects. Judges from local industry evaluate the projects on …

A Discussion Of Anti-Islanding Protection Schemes Incorporated In A Inverter Based Dg, Mohamed Moin Hanif, Malabika Basu, Kevin Gaughan

Conference papers

The discussion in this paper is about the local anti-islanding protection techniques that are incorporated in a inverter based DG. The most widely used passive and active techniques along with their suitability to reduce the Non-detection zone (NDZ) are explained here. The most recent work using wavelet transform which actually reduces the NDZ to zero is also introduced in the last section of the paper.

A Parametric Analysis Of Domestic Electricity Consumption Patterns In Ireland, Fintan Mcloughlin, Aidan Duffy, Michael Conlon

Conference Papers

This paper reports findings from a study of electrical load profiles obtained from a survey of a representative cross section of approximately 4,000 Irish dwellings. Electricity demand was recorded at half-hourly intervals for each dwelling over a six month period from 1st July 2009 to 31st December 2009. Descriptive statistics are shown for each electrical parameter such as mean, maximum demand, load factor and time of use (ToU) of electricity consumption. The mean power demand and daily mean load factor of the sample was 0.512kW and 23.43% respectively for all dwellings over the monitoring period. A mean daily maximum demand …

Passive Matrix Electro-Luminescent Display System, Michael E. Miller, John F. Hamilton Jr., Andrew D. Arnold

AFIT Patents

A passive matrix, electro-luminescent display system has a passive matrix, electro-luminescent display having an orthogonally oriented array of column and row electrodes and an electro-luminescent layer located between the electrodes at the intersection of each column and row electrode forming an individual light-emitting element. Drivers provide separate signals at different times to different groups of row electrodes within the array of row electrodes; wherein the row electrodes of each group simultaneously receive at least two different level signals. A display driver receives and processes the input image signal to provide a presharpened image control signal. Column drivers respond to the …

Investigation Of Vertical Handoff Techniques In Integrated Wlan/Cellular Networks And Performance Analysis Of Horizon Handoff In Wimax Networks, Elaheh Arabmakki

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirement for the Degree of Master of Science by Elaheh Arabmakki May 9, 2011.

Hydrodynamic Modeling Of Surface Plasmon Enhanced Photon Induced Current In A Gold Grating, Alex English, Cheng-Wen Cheng, Lloyd Lowe Ii, Min-Hsiung Shih, Wan Kuang

Electrical and Computer Engineering Faculty Publications and Presentations

The current induced by incident photons on an gold grating slab is investigated numerically and experimentally. A semi-classical electrodynamic model is developed under the weak nonlinearity approximation. Electrons in the conduction band are treated as an electron gas in the presence of a self-consistent electromagnetic field. The model is solved by the finite element method and compared with measurements. The calculated current density as a function of incident angle and wavelength is found to be in qualitative agreement with the experimental measurements. The results show that increasing surface plasmon spatial variation enhances photon induced current.

Free-Space Optical Communication Link Using Spatial Optical Encryption, Syed H. Murshid, William B. Howard, Abhijit Chakravarty

Electrical Engineering and Computer Science Faculty Publications

Free-space optical links are ideal for short-range (1 km to 3 km) communications. An innovative new technique called Spatial Optical Encryption can be used to secure laser data communications. With this technique, data can be encoded and transmitted spatially through a single fiber, and then transmitted over a free-space optical link. Different sources of data could be simultaneously sent over the same fiber. This endeavor demonstrates the design and performance issues of such a transmitter and receiver using Spatial Optical Encryption over an environmental link of 100 meters.

Attenuation And Bit Error Rate For Four Co-Propagating Spatially Multiplexed Optical Communication Channels Of Exactly Same Wavelength In Step Index Multimode Fibers, Syed H. Murshid, Abhijit Chakravarty

Electrical Engineering and Computer Science Faculty Publications

Spatial domain multiplexing (SDM) utilizes co-propagation of exactly the same wavelength in optical fibers to increase the bandwidth by integer multiples. Input signals from multiple independent single mode pigtail laser sources are launched at different input angles into a single multimode carrier fiber. The SDM channels follow helical paths and traverse through the carrier fiber without interfering with each other. The optical energy from the different sources is spatially distributed and takes the form of concentric circular donut shaped rings, where each ring corresponds to an independent laser source. At the output end of the fiber these donut shaped independent …

Observability Analysis Of Cooperative Localization Using Graph Theory And Lie Derivatives, Rajnikant Sharma

Faculty Publications

In this report we derive the observability matrix for an edge between two robots and an edge between a robot and a landmark.

Terahertz Material Detection From Diffuse Surface Scattering, Scott Schecklman, Lisa M. Zurk, Samuel C. Henry, Gabriel Paul Kniffin

Electrical and Computer Engineering Faculty Publications and Presentations

The potential for terahertz (THz) spectroscopy to detect explosives and other materials of interest is complicated by rough surface scattering. Our previous work has demonstrated that by averaging over diffuse observation angles and surfaces, spectral features could be recovered from laboratory measurements and numerical computer simulations. In addition to averaging, a low-pass cepstrum filter was used to reduce noise due to the random rough surface. This paper expands on these concepts by using the cepstrum of both the random rough surface and the material properties of the target material to choose an optimal cutoff frequency for the filter. The utility …

Humidity Sensor Based On A Single-Mode Hetero-Core Fiber Structure, Qiang Wu, Yuliya Semenova, Jinesh Mathew, Pengfei Wang, Gerald Farrell

Articles

Using a small-core single-mode fiber (SCSMF), a novel relative humidity (RH) sensor based on an SMF28-SCSMFSMF28 fiber structure was proposed in this paper. By depositing a humidity sensitive material, such as poly (ethylene oxide) (PEO) on the bare SCSMF fiber, the proposed structure can act as an RH sensor with high sensitivity. Experiments demonstrated that the proposed RH sensor with PEO coating can achieve a sensitivity of 430nm per relative humidity unit (RHU) in the RH range from 80% to 83% RH and a sensitivity of 50nm per RHU in the RH range from 83% to 95% RH.

Examination Of Chaotic Signal Encryption And Recovery For Secure Communication Using Hybrid Acousto-Optic Feedback, Monish Ranjan Chatterjee, Mohammed A. Al-Saedi

Electrical and Computer Engineering Faculty Publications

Generation of chaos from acousto-optic (A-O)Bragg cell modulators with an electronic feedback has been studied for over 3 decades. Since an acousto-optic Bragg cell with zeroth- and first-order feedback exhibits chaotic behavior past the threshold for bistability, such a system was recently examined for possible chaotic encryption of simple messages (such as a low-amplitude sinusoidal signal) applied via the bias input of the sound cell driver. Subsequent recovery of the message signal was carried out via a heterodyne-type strategy employing a locally generated chaotic carrier, with threshold parameters matched to the transmitting Bragg cell.

In this paper, we present numerical …

Integrating Embedded Computing Systems Into High School And Early Undergraduate Education, Bridget Benson, Arash Arfaee, Choon Kim, Ryan Kastner, Rajesh K. Gupta

Electrical Engineering

Early exposure to embedded computing systems is crucial for students to be prepared for the embedded computing demands of today's world. However, exposure to systems knowledge often comes too late in the curriculum to stimulate students' interests and to provide a meaningful difference in how they direct their choice of electives for future education and careers. This paper describes an experience with integrating embedded computing systems education into high school and early undergraduate curricula to give students that needed early exposure. It provides assessment data that illustrates the success and limitations of the efforts described as well as the lessons …

Develop Energy Dashboard For Real-Time Campus Energy Use Monitoring, Hsui-Lin Winkler, Charlene Hoegler, William Batina

Cornerstone 3 Reports : Interdisciplinary Informatics

No abstract provided.

Quantum Phase Estimation Using Multivalued Logic, Marek Perkowski, Vamsi Parasa

Electrical and Computer Engineering Faculty Publications and Presentations

We generalize the Quantum Phase Estimation algorithm to MVL logic. We show the quantum circuits for QPE using qudits. We derive the performance requirements of the QPE to achieve high probability of success. We show how this leads to logarithmic decrease in the number of qudits and exponential decrease in error probability of the QPE algorithm as the value of the radix d increases.

Synthesis Of Reversible Synchronous Counters, Marek Perkowski, Mozammel H.A. Khan

Electrical and Computer Engineering Faculty Publications and Presentations

In this paper, we concentrate on design of synchronous counters directly from reversible gates.

Exploration Of Spatial Diversity In Multi-Antenna Wireless Communication Systems, Shichuan Ma

Department of Computer Electronics and Engineering: Dissertations, Theses, and Student Research

With increasing demand on wireless internet and personal multimedia, the data rate of wireless communications is expected to increase dramatically. Future wireless networks face challenges of supporting data rates higher than one gigabits per second. Among various technologies, multi-antennas, also known as multiple-input multiple-output (MIMO), are undoubtedly the most promising to enable higher data rates. By employing the extra degrees of freedom in the spatial domain, multi-antenna techniques enhance the wireless communication systems through array gain, spatial diversity, and spatial multiplexing. Although multi-antenna systems have been utilized for more than ten years, a thorough analysis of various aspects of multi-antenna …

Characteristics Of The Fields In The Near And Far Zone Of Antennas And Its Significance In Wireless Communication, Arijit De

Electrical Engineering and Computer Science - Dissertations

The characterization of the fields radiated from antennas in wireless communication scenario has been mostly overlooked by communication society. The definition and application of Near-Field and Far-field has mostly been considered from the antenna measurement community. To date no critical study does exist for the evaluation of the far-field criterion in a wireless communication scenario. This dissertation tries to provide certain guidelines characterizing the near-field and the far-field using a Maxwellian framework. The implications of the near-field environment are then discussed. It appears that the concept of near and far fields are not clearly interpreted in the wireless communication literature. …

A Quantitative, Technology Independent, Fidelity Metric For Evaluating Bioprinted Patterned Co-Cultures, Matthew Pepper

All Theses

The study of cell-cell interactions is crucial in the understanding of cell behaviors such as tumor genesis, proliferation, migration, metastasis, and apoptosis. To break down the complex web of signals in vivo, researchers must replicate some parts of this environment with in vitro tissue test systems, composed of multiple cell types arranged close enough to communicate with their neighbors, i.e. high-resolution co-culture patterns. The field of bioprinting is specifically focused on creating co-culture patterns for the purposes of cell studies, but the sample resolutions of most bioprinting systems are still too coarse to permit cell communication. No way currently exists …

Unified Point-Edgelet Feature Tracking, Kalaivani Sundararajan

All Theses

Feature tracking algorithms have conventionally tracked `corner' features or windows with high spatial frequency content. However, this conventional point feature representation of scenes would be inappropriate for poorly textured image sequences like indoor image sequences. To overcome this problem, we propose a feature tracking algorithm which tracks point features and edgelets
simultaneously. Edgelets are straight line approximations of intensity edges in an image. Hence, a combination of point features and edgelets provides a better representation of untextured sequences with the point features and edgelets complementing each other. We show that this property results in more robust tracking.
Tracking edgelets is …