Engineering Commons^™

Cognitive Security Framework For Heterogeneous Sensor Network Using Swarm Intelligence, Rajani Muraleedharan

Electrical Engineering and Computer Science - Dissertations

Rapid development of sensor technology has led to applications ranging from academic to military in a short time span. These tiny sensors are deployed in environments where security for data or hardware cannot be guaranteed. Due to resource constraints, traditional security schemes cannot be directly applied. Unfortunately, due to minimal or no communication security schemes, the data, link and the sensor node can be easily tampered by intruder attacks. This dissertation presents a security framework applied to a sensor network that can be managed by a cohesive sensor manager. A simple framework that can support security based on situation assessment …

Protection Models For Web Applications, Karthick Jayaraman

Electrical Engineering and Computer Science - Dissertations

Early web applications were a set of static web pages connected to one another. In contrast, modern applications are full-featured programs that are nearly equivalent to desktop applications in functionality. However, web servers and web browsers, which were initially designed for static web pages, have not updated their protection models to deal with the security consequences of these full-featured programs. This mismatch has been the source of several security problems in web applications.

This dissertation proposes new protection models for web applications. The design and implementation of prototypes of these protection models in a web server and a web browser …

Designing, Understanding, And Analyzing Unconventional Computation: The Important Role Of Logic And Constructive Mathematics, Vladik Kreinovich

Departmental Technical Reports (CS)

In this paper, we explain why, in our opinion, logic and constructive mathematics are playing -- and should play -- an important role in the design, understanding, and analysis of unconventional computation.

Towards A General Description Of Translation-Invariant And Translation-Covariant Linear Transformations: A Natural Justification Of Fourier Transforms And Fuzzy Transforms, Irina Perfilieva, Vladik Kreinovich

Departmental Technical Reports (CS)

In many practical situations, we are interested in the dependencies that do not change with time, i.e., that do not change when we change the origin of the time axis. The corresponding translation-invariant transformations are easy to describe: they correspond to convolutions, or, equivalently, to fuzzy transforms.

It turns out that if we relax the invariance condition and require only that the transformation be translation-covariant (i.e., that it appropriately changes under translation), we get exactly two classes of transformations: Fourier transforms and fuzzy transforms. This result explain why both transforms have been successfully used in data processing.

Physical Impact Of Waterjet-Based Sediment Remediation On Benthic Organisms, Grace Harper, Andrew Curtis Elmore, Christopher Redell, Gavin Risley, Joel Gerard Burken

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Adding Activated Carbon to Sediments Has Been Shown to Be an Effective Means of Reducing the Bioavailability of Certain Contaminants. the Current State of the Practice is to Mechanically Mix Activated Carbon to a Target Concentration of 3 Percent at Depths of Approximately 30 Cm using a Rotovator or Similar Construction Equipment. Waterjets Have Been Used to Cut Hard Material using a Mixture of Water and an Abrasive. If Activated Carbon is Substituted for the Abrasive, Waterjets Have the Potential to Use Surface Injection as a Replacement for Mechanical Mixing during Sediment Remediation. a Perceived Benefit of Waterjet-Based Sediment Remediation …

Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments, Gavin H.R. Risley, Andrew Curtis Elmore, Joel Gerard Burken, Grzegorz (Greg) Galecki

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

While the Techniques and Technologies Associated with Contaminated Sediment Remediation Are Relatively Mature, There Are Several Issues Associated with These Practices that Make Them Unattractive. the Inability of Currently Used Mechanical Mixing Implements to Place Amendments in Aqueous Environments and their Intrusive Behavior toward Benthic Communities Are Just Two Examples of a Necessity for an Improved Delivery Method. Waterjets May Be a Viable Option for Placement of Particulate Remediation Amendments, Such as Activated Carbon and Granular Iron, at Depth. a Custom Waterjet Nozzle and Injection System Has Been Fabricated by the Authors to Examine This Delivery Concept. the Developed Injection …

บทวิเคราะห์เปรียบเทียบกรณีศึกษาสถาบันวิจัยเทคโนโลยีระบบรางในต่างประเทศ (กรณีศึกษาประเทศญี่ปุ่นและเกาหลี), รุ่งโรจน์ กมลเดชเดชา

Journal of Transportation and Logistics (TRANSLOG)

No abstract provided.

การพัฒนาระบบรถไฟฟ้าขนส่งมวลชนในประเทศไทย, สมพงษ์ ศิริโสภณศิลป์, วิษารัช สัญญาลักษณ์ฤาชัย, วิรัช หิรัญ

Journal of Transportation and Logistics (TRANSLOG)

No abstract provided.

บทสัมภาษณ์ (ตอนที่ 2) ถอดความจากรายการวิทยุ "จุฬาวิจัย" ออกอากาศทางสถานีวิทยุแห่งจุฬาลงกรณ์มหาวิทยาลัย Cu Radio Fm 101.5 Mhz ประจำวันเสาร์ที่ 22 สิงหาคม 2552 ออกอากาศระหว่างเวลา 9.30-9.55 น., ยศพร พยุงสุวรรณ

Journal of Transportation and Logistics (TRANSLOG)

No abstract provided.

Advancements In Solid Acid Catalysts For Ecofriendly And Economically Viable Synthesis Of Biodiesel, Yogesh C. Sharma, Bhaskar Singh, John Korstad

College of Science and Engineering Faculty Research and Scholarship

Solid acid (heterogeneous) catalysts have a unique advantage in esterification and transesterification reactions which enhances the use of high acid value oil to be used as feedstock for synthesis of biodiesel. Various solid acid catalysts such as resins, tungstated and sulfated zirconia, polyaniline sulfate, heteropolyacid, metal complexes, sulfated tin oxide, zeolite, acidic ionic liquid, and others have been explored as potential heterogeneous catalysts. The activity of the catalyst differs slightly resulting in moderate to high conversion and yield. The reuse of the solid catalyst is governed by their deactivation, poisoning, and the extent of leaching in the reaction medium. The …

A Critical Review On Recent Methods Used For Economically Viable And Eco-Friendly Development Of Microalgae As A Potential Feedstock For Synthesis Of Biodiesel, Yogesh C. Sharma, Bhaskar Singh, John Korstad

College of Science and Engineering Faculty Research and Scholarship

Microalgae are being considered as a viable feedstock for large-scale production of biodiesel. However, though it may look simpler to obtain lipids from microalgae, the overall process of choosing an algal strain, cultivation, harvesting, dewatering, and extraction of oil is quite complicated and not economically prudent at this time. A thorough understanding of algae and the overall biodiesel production process discussed in this paper is vital so that focused research might lower the costs involved. Various diverse species of microalgae are currently being used as feedstocks for biofuel. Heterotrophic culture may be preferred over photoautotrophic cultivation. For cultivation, specially fabricated …

Modeling Diverse Physics Of Nanoparticle Self-Assembly In Pulsed Laser-Irradiated Metallic Films, Mikhail Khenner

Mathematics Faculty Publications

Presents physics behind dewetting of thin liquid films and mathematical/computational modeling tools (Educational/Research presentation for senior physics majors).

Solar Power System Modeling And Performance Analysis, Jiaqi Wang

Electronic Theses and Dissertations

At present the main source of our power and energy needs are from fossil fuel; almost all transportation tools and nearly 70% of electrical power are produced by fossil fuel. But unfortunately these materials are limited in our planet, with obvious drawback such as pollution. So looking for new kinds of energy supply is an urgent matter. Solar-powered photovoltaic system provides a clean energy solution to this problem. It is developing fast all over the world in terms of both research work and actual applications. It is estimated that the power supplied by solar energy can provide 10 percent of …

Simulation, Application, And Resilience Of An Organic Neuromorphic Architecture, Made With Organic Bistable Devices And Organic Field Effect Transistors, Robert A. Nawrocki

Electronic Theses and Dissertations

This thesis presents work done simulating a type of organic neuromorphic architecture, modeled after Artificial Neural Network, and termed Synthetic Neural Network, or SNN. The first major contribution of this thesis is development of a single-transistor-single-organic-bistable-device-per-input circuit that approximates behavior of an artificial neuron. The efficacy of this design is validated by comparing the behavior of a single synthetic neuron to that of an artificial neuron as well as two examples involving a network of synthetic neurons. The analysis utilizes electrical characteristics of polymer electronic elements, namely Organic Bistable Device and Organic Field Effect Transistor, created in the laboratory at …

Label-Free Biochemical Recognition Using Mems Resonators For Microarray Technology, Babak Tousifar

Electronic Theses and Dissertations

Highly sensitive biosensors capable of detecting and characterizing smallest quantities of cellular and molecular targets are needed in pharmaceutical and medical diagnostics industries. In this work, the importance of biological target recognition specifically proteins through microarray technologies has been discussed and the most successful tools and techniques have been studied. Moreover, a thermally actuated Micro Electro-Mechanical Systems (MEMS) resonator has been demonstrated and fabricated in this work as an accurate, reliable and low cost biotechnology tool. As a proof of concept, amine to epoxide coupling of octadecylamine to functionalized silicon dioxide surface have been shown through resonator frequency monitoring. The …

Video Stabilization Using Sift Features, Fuzzy Clustering, And Kalman Filtering, Kevin Veon

Electronic Theses and Dissertations

Video stabilization removes unwanted motion from video sequences, often caused by vibrations or other instabilities. This improves video viewability and can aid in detection and tracking in computer vision algorithms. We have developed a digital video stabilization process using scale-invariant feature transform (SIFT) features for tracking motion between frames. These features provide information about location and orientation in each frame. The orientation information is generally not available with other features, so we employ this knowledge directly in motion estimation. We use a fuzzy clustering scheme to separate the SIFT features representing camera motion from those representing the motion of moving …

Bedside Method To Estimate Actual Body Weight In The Emergency Department, Robert G. Buckley, Christine R. Stehman, Frank L. Dos Santos, Robert H. Riggenburgh, Aaron Swenson, Nathan Mjos, Matt Brewer, Sheila Mulligan

United States Navy: Publications

Background:

Actual body weight (ABW) is important for accurate drug dosing in emergency settings. Oftentimes, patients are unable to stand to be weighed accurately or clearly state their most recent weight.

Objective:

Develop a bedside method to estimate ABW using simple anthropometric measurements.

Methods:

Prospective, blinded, cross-sectional convenience sampling of adult Emergency Department (ED) patients. A multiple linear regression equation from Derivation Phase (n = 208: 121 males, 87 females) found abdominal and thigh circumferences (AC and TC) had the best fit and an inter-rater correlation of 0.99 and 0.96, respectively: Male ABW (kg) = -47.8 + 0.78 * (AC) …

Reference Set Metrics For Multi-Objective Algorithms, Chilukuri K. Mohan, Kishan Mehrotra

Electrical Engineering and Computer Science - All Scholarship

Several metrics and indicators have been suggested in the past to evaluate multi-objective evolutionary and non-evolutionary algo- rithms. However, these metrics are known to have many problems that make their application sometimes unsound, and sometimes infeasible. This paper proposes a new approach, in which metrics are parameter- ized with respect to a reference set, on which depend the properties of any metric.

Spatial Whitening Framework For Distributed Estimation, Swarnendu Kar, Pramod K. Varshney

Electrical Engineering and Computer Science - All Scholarship

Designing resource allocation strategies for power constrained sensor network in the presence of correlated data often gives rise to intractable problem formulations. In such situations, applying well-known strategies derived from conditionalindependence assumption may turn out to be fairly suboptimal. In this paper, we address this issue by proposing an adjacency-based spatial whitening scheme, where each sensor exchanges its observation with their neighbors prior to encoding their own private information and transmitting it to the fusion center. We comment on the computational limitations for obtaining the optimal whitening transformation, and propose an iterative optimization scheme to achieve the same for large …

Motivating Technical Writing Through Study Of The Environment, J. Linsdell, Thalia Anagnos

Faculty Publications

No abstract provided.

The Effects Of Tank Operation And Design Characteristics On Water Quality In Distribution System Storage Tanks, Christopher T. Olson, Delvin Deboer

Water and Environmental Engineering Research Reports

From the Executive Summary

Background:
Regional water systems utilize storage facilities to meet demand variations and pressure requirements of their systems. These storage facilities drain and fill in response to system water demands and water level control settings. Storage tanks are typically placed in strategic locations to maintain a consistent pressure in the distribution system. Storage facilities should be designed and operated such that the water is mixed to prevent stagnant water (old water that remains in the tank for an extended period). Stagnant water can lead to water quality issues, such as low disinfectant residuals, potential for microbial contamination, …

Effects Of Liquefaction-Induced Ground Failure On Bridges, Roads, Railroads And Lifeline Systems, Christian Ledezma, Scott Ashford, Tara Hutchinson, Robb E.S. Moss, Pedro Arduino, Robert Kayen, Scott Olson

Civil and Environmental Engineering

No abstract provided.

Landfill Temperatures Under Variable Decomposition Conditions, Nazli Yesiller, James L. Hanson, H. Yoshida

Civil and Environmental Engineering

This study was conducted to evaluate temperature, gas, and leachate data at two landfills in similar climatic regions (Detroit, Michigan, USA and Asahikawa, Hokkaido, Japan) to determine the interrelations between heat production and resulting waste temperatures and gas and leachate levels in landfills under variable decomposition conditions. Significant temperature increases occurred under long-term anaerobic conditions. Stable elevated temperatures under anaerobic conditions were observed for wastes at central locations. Seasonal fluctuations in both temperature and gas existed at shallow depths and near perimeter locations. Placement of an overfill of fresh wastes over old wastes affected temperatures, yet did not significantly influence …

Variability And Accuracy Of Target Displacement From Nonlinear Static Procedures, Rakesh K. Goel

Civil and Environmental Engineering

This paper compares the target displacement estimate from four current nonlinear static procedures—FEMA-356 CM, ASCE41 CM, ATC-40 CSM, and FEMA-440 CSM—with the value derived from recorded motions of five strongly shaken reinforced concrete buildings.This comparison provides useful insight into two important questions: (1) how much does the target displacement vary among the four nonlinear static procedures? and (2) can the engineering profession “accurately” predict the response of a real building during an earthquake event using currently available modeling techniques and pushover analysis procedures? It is shown that these procedures may lead to significantly different estimates of the target displacement, particularly …

Comparison Of Base Shears Estimated From Floor Accelerations And Column Shears, Rakesh K. Goel

Civil and Environmental Engineering

This paper compares base shears computed from floor accelerations (inertial base shear) and column shears (structural base shear) for two mid-rise, multistory buildings due to a suite of 30 earthquake ground motions. The presented results demonstrate that the inertial base shear exceeds the structural base shear in the median by 10% to 20% and may exceed the structural base shear by as much as 70% for individual ground motions. Therefore, it is concluded that the inertial base shear computed from strong motion records should be used with caution to estimate the structural base shear.

Building A Visual Front-End For Audio-Visual Automatic Speech Recognition In Vehicle Environments, Robert Hursig, Jane Zhang

Electrical Engineering

Automatic speech recognition (ASR) holds the promise of providing a natural, efficient, and safer means for communication between humans and computers and can profoundly change the way we live. Since its invention in the 1950s, ASR has witnessed considerable research activities and in recent years is finding its way into practical applications as evidenced by more and more consumer devices such as PDAs and mobile phones adding ASR features. While mainstream ASR has focused almost exclusively on the acoustic signal, the performance of these systems degrades considerably in the real-world in the presence of noise. One way to overcome this …

Pipe Flow – A Tutorial For Electrical Engineers, William Ahlgren

Electrical Engineering

Energy is transported over long distances primarily by electric power transmission lines and by pipelines carrying gas or liquid fuel. Electric power engineers need to compare these two energy transmission methods, but often lack knowledge of fluid mechanics pre‐requisite to understanding pipeline transmission. This article provides a focused tutorial to provide the necessary background in the fluid mechanics of pipe flow.

Technique To Measure Heats Of Reaction Of Ti-B, Al-Ti-B, And Al-Ti-B4c Powder Blends, Andrew H. Baker

Dissertations, Master's Theses and Master's Reports - Open

In this research, a modification to initiation aid ignition in bomb calorimetry that involves systemically blending levels of boron and potassium nitrate initiation aids with a bulk structural energetic elemental power blend is developed. A regression is used to estimate the nominal heat of reaction for the primary reaction. The technique is first applied to the synthesis of TiB2 as a validation study to see if close proximity to literature values can be achieved. The technique is then applied to two systems of interest, Al-Ti-B, and Al-Ti-B4C. In all three investigations, x-ray diffraction is used to characterize the product phases …

Compressed Sensing Based Cyclic Feature Spectrum Sensing For Cognitive Radios, Yohannes Z. Tafesse

Dissertations, Master's Theses and Master's Reports - Open

Spectrum sensing is currently one of the most challenging design problems in cognitive radio. A robust spectrum sensing technique is important in allowing implementation of a practical dynamic spectrum access in noisy and interference uncertain environments. In addition, it is desired to minimize the sensing time, while meeting the stringent cognitive radio application requirements. To cope with this challenge, cyclic spectrum sensing techniques have been proposed. However, such techniques require very high sampling rates in the wideband regime and thus are costly in hardware implementation and power consumption. In this thesis the concept of compressed sensing is applied to circumvent …

Evaluation Of The Performance And Cost-Effectiveness Of Pavement Sections Containing Open-Graded Base Courses, Abdul A. Koroma

Dissertations, Master's Theses and Master's Reports - Open

Moisture induced distresses have been the prevalent distress type affecting the deterioration of both asphalt and concrete pavement sections. While various surface techniques have been employed over the years to minimize the ingress of moisture into the pavement structural sections, subsurface drainage components like open-graded base courses remain the best alternative in minimizing the time the pavement structural sections are exposed to saturated conditions. This research therefore focuses on assessing the performance and cost-effectiveness of pavement sections containing both treated and untreated open-graded aggregate base materials.

Three common roadway aggregates comprising of two virgin aggregates and one recycled aggregate were …