Engineering Commons^™

Smart And Sustainable Aquaponics, Ryan Toal, Kevin Claggett, Justin Goh

Electrical and Computer Engineering Senior Theses

As the global population increases, new ways of sustainable and efficient food production need to be explored in order to meet the growing demand from society. In this paper we explore the methods and functionality of an off-grid, semi-autonomous aquaponics system. This system will serve as a proof of concept for a large scale aquaponics system which can be modelled in other parts of the world where arable land is scarce. It was found that though the initial startup costs are high, it will be able to reduce the cost of food in the long run. The system implements a …

The Solar Microgrid Project In Togo, Christian Jason Wintery, Alexander Mayorkis

Electrical and Computer Engineering Senior Theses

Danyi Mempassem, Togo, Africa has villagers in need of electricity, however, they cannot afford to put in the infrastructure and then pay the steep cost of energy from the government. The best option for energy for the village is an affordable and renewable resource but due to limitations of geography the only viable option is a photo-voltaic system. We designed a working solar microgrid tailored for the location and weather of the village which can support all of the lights, cell phone chargers, and televisions that the villagers need/desire while being reliable, sustainable, safe, and affordable. The design and implementation …

Smart Grid Technology In The Developing World, Jacob R. Young

Honors Projects

A smart grid is the integration of communication and information technologies with contemporary power infrastructure to enhance load service and to incorporate continually evolving end-use applications. It is the latest advancement in the areas of power generation, transmission and distribution. It has advanced beyond the traditional grid structure at every stage; a smart grid is capable of incorporating distributed generation (DG) renewable sources and has improved transmission capabilities through implementation of technologies such as Flexible AC Transmission Systems (FACTS). Through the addition of control technology in the distribution network a smart grid is able to implement “self-healing” and other methods …

Adaptive Light Dimmer, Jonathan Sato, William Xiong

Electrical Engineering

This project, the Adaptive Light Dimmer for the DC House, senses a room's light content and adjusts a lamp's light intensity accordingly, thus regulating the room's light content. The device is designed to work with renewable energy sources such as wind and solar energy. This would be useful in less developed countries where AC electricity is not well spread and renewable DC, such as solar, can be better utilized. It functions by using the TSL2561 light sensor to sense light, ATTiny85 microcontroller to output PWM to the LED driver, LT3795 LED driver to output current to an LED and LT3014 …

Front Matter

Journal of Digital Forensics, Security and Law

No abstract provided.

Predicting Solar Performance In A Contingency Environment To Meet Net-Zero Facility Power, Anthony D. Williams

Theses and Dissertations

The U.S. government is involved in contingency operations all over the world and these operations require operational support and sustainment in these locations; this includes the reliable delivery of power to base infrastructure. The traditional means of delivering this support requirement in austere environments has been the use of diesel-power generation that has an extensive logistical and economic tail. The research sought out contingency solar applications that may be implemented and operated to offset the facility demand loads in the location to achieve net-zero power. This research explores the technical feasibility of a deployable photovoltaic microgrid to deliver power to …

Uhf Rfid Antenna Impedance Matching Techniques, Kamron Sockolov

Master's Theses

Radio Frequency Identification (RFID) systems use electromagnetic signals to wirelessly identify and track RFID-tagged objects. A reader transmits a carrier wave request signal to an RFID tag, which then transmits a unique identification signal back to the reader. Applications include supply chain inventory management, automated toll booth fee systems, sports event timing, restricted access control, pet monitoring and retail theft prevention. An RFID tag includes an antenna connected to a Radio Frequency Integrated Circuit (RFIC). RFID tags in the ultra-high frequency (UHF), industrial, scientific and medical (ISM) 902-928MHz band and global Electronic Product Code (EPC) 860‑960MHz band are powered passively …

A Multi-Institutional Approach To Delivering Shared Curricula For Developing A Next-Generation Energy Workforce, Lawrence E. Holloway, Zhihua Qu, Margaret J. Mohr-Schroeder, Juan Carlos Balda, Andrea Benigni, Donald G. Colliver, Paul A. Dolloff, Roger A. Dougal, M. Omar Faruque, Zongming Fei, Yuan Liao, Roy A. Mccann, R. Mark Nelms, Vijay P. Singh, Azadeh Vosoughi, Qun Zhou

Electrical and Computer Engineering Faculty Publications

In this paper, we consider collaborative power systems education through the FEEDER consortium. To increase students' access to power engineering educational content, the consortium of seven universities was formed. A framework is presented to characterize different collaborative education activities among the universities. Three of these approaches of collaborative educational activities are presented and discussed. These include 1) cross-institutional blended courses (“MS-MD”); 2) cross-institutional distance courses (“SS-MD”); and 3) single-site special experiential courses and concentrated on-site programs available to students across consortium institutions (“MS-SD”). This paper presents the advantages and disadvantages of each approach.

Computational Modeling Of A Williams Cross Flow Turbine, Sajjan Pokhrel

Browse all Theses and Dissertations

Hydropower is not only the most used renewable energy source in the United States, but in the world. While it is well known that large hydropower facilities, like the Hoover Dam, provide large amounts of electrical power, there is also a tremendous opportunity for hydroelectric power generation from small scale facilities that has largely been overlooked. The work being presented here studies a new cross flow turbine called the Williams Cross Flow Turbine (WCFT), which was designed to extract electric energy from low head, run-of-the-river, small hydropower sites. To spur the implementation of the WCFT in small hydropower applications, and …

Worldwide Optimal Pics Search, Ruchira Tabassum

Electronic Theses and Dissertations

Pseudo Invariant Calibration Sites (PICS) have proven to be a dependable calibration source for determining degradation of visible and infrared sensor response due to their temporal stability and spatial uniformity. One limit of PICS is that only a handful have been identified, primarily in desert areas of North Africa, Saudi Arabia, and elsewhere. A large number of PICS would not only facilitate calibration of existing and future sensors, but also provide an alternative to internal on-board calibrator data, resulting in significant cost savings and simplification in sensor design. As a result, the process to efficiently identify additional PICS is highly …

Reneb - Running The European Network Of Biological Dosimetry And Physical Retrospective Dosimetry, Ulrike Kulka, Michael Abend, Liz Ainsbury, Christophe Badie, Joan-Francesc Barquinero, Leonardo Barrios, Christina Beinke, Emanuela Bortolin, Alexandra Cucu, Fiona Lyng

Articles

Purpose: A European network was initiated in 2012 by 23 partners from 16 European countries with the aim to significantly increase individualized dose reconstruction in case of large-scale radiological emergency scenarios.

A Novel Direct Torque Control Using Second Order Continuous Sliding Mode Of A Doubly Fed Induction Generator For A Wind Energy Conversion System, Zinelaabidine Boudjema, Rachid Taleb, Youcef Djeriri, Adil Yahdou

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper a new robust direct torque control strategy based on second order continuous sliding mode and space vector modulation of a doubly fed induction generator integrated in a wind energy conversion system is presented. The conventional direct torque control (C-DTC) with hysteresis regulators has significant flux and torque ripples at steady-state operation and also the switching frequency varies in a wide range. The proposed DTC technique based on second order continuous sliding mode control reduces flux, current, and torque ripples. It also narrows down the switching frequency variations in induction machine control. Two different sliding surfaces such as …

Normalization Of Pseudo-Invariant Calibration Sites For Increasing The Temporal Resolution And Long-Term Trending, Harika Vuppula

Electronic Theses and Dissertations

Given their low level of temporal, spatial, and spectral variability, Pseudo-Invariant Calibration Sites (PICS) have been increasingly desired as data sources for radiometric calibration of Earth imaging satellite sensors. The temporal resolution for PICS data acquired by any sensor is limited by the amount of time required for it to make subsequent passes over the site. Consequently, for any given PICS, it can take many years of imaging to develop a sufficient amount of cloud-free data to perform radiometric calibration; this can be especially problematic for sensors in their early years after launch. This thesis presents techniques to combine Landsat-8; …

Periodic Control For The Cart Pendulum System With Structured Uncertainty, Arindam Chakraborty, Jayati Dey

Turkish Journal of Electrical Engineering and Computer Sciences

The robust stabilization of the cart pendulum system was studied under structured uncertainty with a continuous-time periodic controller. The cart pendulum system was considered here as the test set-up as it is a well-known example of an unstable nonminimum phase system. The uncertainty in the system rose due to measurement error or dry friction in it. In this paper, the robust stability of the periodic controller in the presence of uncertainty was examined. The gain margin and delay margin endow with the periodic controller were superior to those obtained in the case of linear time invariant (LTI) control even in …

A Measurement Study Of Internet Exchange Points (Ixps): History And Future Prediction, Mohammad Masoud, Yousef Jaradat, Ismael Jannoud

Turkish Journal of Electrical Engineering and Computer Sciences

Internet exchange points (IXPs) emerged to remedy the deficiency of peering connections among autonomous systems (ASes). IXPs play an important role in reducing the cost of transit connections over the Internet. This work attempts to study the popularity of IXPs over the Internet. This work consists of two main parts. The first part is a measurement study of multihistorical snapshots of IXPs. These historical data have been harvested for different European IXPs with emphasis on Amsterdam (AMS-IX) IXP. In the second part, two nonlinear autoregressive exogenous (NARX) back-propagation neural network models (BPNN) have been implemented to predict the following: the …

Error Sources And Measurement Uncertainties In Outdoor Testing Of Bipv Modules, Kivanç Başaran

Turkish Journal of Electrical Engineering and Computer Sciences

Although building-integrated photovoltaic (BIPV) systems have great potential, investment in this field is not at the desired level. There are two main reasons for this: the lack of technical analysis and economic reasons. Manufacturers and investors utilize datasheets of modules to determine the systems performance, which is determined at standard test conditions (STCs). However, there are apparent differences between STCs and outdoor measurements. Most studies in the field of BIPV system analysis have only focused on long-term outdoor measurements. Besides that, uncertainty of measurements is necessary to achieve scientific results. The aim of this study is to emphasize the importance …

Safety-Critical Wireless Sensor Networks Under A Polyphase Spreading Sequences Scenario, Poonam Goyal, Brahmjit Singh

Turkish Journal of Electrical Engineering and Computer Sciences

Reliable communication is a vital issue for safety- and mission-critical wireless sensor network environments such as industrial monitoring, medical care, and battlefield surveillance. These networks require highly accurate and delay-intolerant wireless communications. Under such critical conditions, the chip sequences used in these networks become vulnerable because of channel impairments and other interferences, thereby significantly decreasing overall system performance. In this paper, polyphase sequences are employed at the physical layer of IEEE Standard 802.15.4 to enhance the communication reliability of wireless sensor networks. Through an extensive simulation, it is found that upon applying polyphase sequences, the chip errors are reduced to …

State-Led Approaches To Electronic Waste Management In The U.S.: A Study Of Stakeholder Involvement In Take-Back Legislation Efficiency, Ashley Elizabeth Westgate

Bard Center for Environmental Policy

Information technology has proliferated over the past two decades, and waste from electronics represents the fastest growing waste stream in the world. The production and disposal of electronics, from cradle to grave, pose critical threats to human health and the environment. The management of electronic, or e-waste, streams poses a particular set of challenges for solid waste management, hazardous waste management, and economic development in the United States. As e-waste accumulates, state governments, municipalities and private landfills are refusing to accept the responsibility for its disposal. To address this problem, the federal and state governments must find a safe and …

Electromagnetic Signal Feedback Control For Proximity Detection Systems, Adam K. Smith

Dissertations, Master's Theses and Master's Reports

Coal is the most abundant fossil fuel in the United States and remains an essential source of energy. While more than half of coal production comes from surface mining, nearly twice as many workers are employed by underground operations.

One of the key pieces of equipment used in underground coal mining is the continuous mining machine. These large and powerful machines are operated in confined spaces by remote control. Since 1984, 40 mine workers in the U. S. have been killed when struck or pinned by a continuous mining machine. It is estimated that a majority of these accidents could …

การประเมินความต้องการเทคโนโลยีพลังงานในภาคอุตสาหกรรมการผลิตเพื่อบรรเทาการเปลี่ยนแปลงสภาพภูมิอากาศ, ศิวพร ปรีชา

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้ศึกษาความต้องการเทคโนโลยีพลังงานเพื่อบรรเทาการเปลี่ยนแปลงสภาพภูมิอากาศของภาคอุตสาหกรรมการผลิตและจัดลำดับความสำคัญของเทคโนโลยีการลดการปล่อยก๊าซเรือนกระจกในภาคอุตสาหกรรมการผลิต เพื่อให้สอดรับกับเป้าหมายการลดการปล่อยก๊าซเรือนกระจก ตามเจตจำนงของประเทศไทยที่ให้ไว้กับภาคีสมาชิกอนุสัญญาสหประชาชาติว่าด้วยการเปลี่ยนแปลงสภาพภูมิอากาศ (UNFCCC) ซึ่งงานวิจัยนี้กำหนดเกณฑ์การประเมินเป็นสองด้านประกอบด้วย ด้านความพร้อม (11 ประเด็น) และด้านผลกระทบ (4 ประเด็น) และอ้างอิงรายการเทคโนโลยีของภาคอุตสาหกรรมการผลิตจาก 3 กลุ่มประเภทพลังงาน คือ กลุ่มพลังงานทางเลือก/พลังงานหมุนเวียน กลุ่มเทคโนโลยีประหยัดพลังงาน และกลุ่มการบริหารจัดการพลังงาน ตามเอกสารของ UNFCCC ซึ่งทำการประเมินโดยผู้เชี่ยวชาญในภาคอุตสาหกรรมการผลิต และวิเคราะห์ด้วยวิธีการประเมินทางเลือกจากหลายเกณฑ์ (MCA) จากผลการวิจัยพบว่า ผู้เชี่ยวชาญให้ความสำคัญของเกณฑ์ด้านความพร้อมในประเด็นนโยบาย โครงสร้างพื้นฐาน รวมทั้งกฎระเบียบที่เกี่ยวข้อง และด้านผลกระทบในประเด็นสิ่งแวดล้อมสูงที่สุด โดยผลการจัดลำความสำคัญของเทคโนโลยีพลังงานเพื่อบรรเทาการเปลี่ยนแปลงสภาพภูมิอากาศของภาคอุตสาหกรรมการผลิต พบว่า เทคโนโลยีระบบความร้อน ระบายอากาศ ปรับอากาศ (HVAC) เชื้อเพลิงชีวมวล/เชื้อเพลิงชีวมวลอัดเม็ด/การทำความร้อนแบบรวมศูนย์ (Biomass heating, wood pellets, district heating) ระบบไฟฟ้าพลังงานร่วม (CHP) ก๊าซพลังงานสะอาดจากชีวมวล (biogas) และการประหยัดพลังงานของอุตสาหกรรมซีเมนต์ มีความพร้อมและผลกระทบสูงสุดตามลำดับ ซึ่งเทคโนโลยีดังกล่าวมีความพร้อมในประเด็นสถานการณ์ปัจจุบันของเทคโนโลยีในประเทศไทยต่ำ โดยปัจจุบันประเทศไทยต้องพึ่งพาการนำเข้าพลังงานและเทคโนโลยีพลังงานที่มีประสิทธิภาพจากต่างประเทศ ทำให้การกระจายตัวของเทคโนโลยีกระจุกตัวอยู่ในกลุ่มอุตสาหกรรมที่มีศักยภาพและความพร้อมสูงเท่านั้น

Energy Management System Considering Battery Lifetime, Prajina Tandukar

Electronic Theses and Dissertations

The contribution of renewable energy resources in the global energy generation has been increasing at a fast pace. Variability and uncertainty are the two main issues related to renewable energy integration. Thus, energy storage systems (ESSs) are used in such systems to smooth the power generated by the renewable energy sources. In order to ensure reliable and economic operation of the system, energy management system (EMS) is implemented to control the dispatch of the available resources. ESS such as a battery requires significant capital investment and frequent replacement. A battery has a maximum lifetime called float life, regardless of energy …

Implementation Of A Web-Based Service For Mobile Application Risk Assessment, Asim Si̇nan Yüksel, Mehmet Erkan Yüksel, Ahmet Sertbaş, Abdül Hali̇m Zai̇m

Turkish Journal of Electrical Engineering and Computer Sciences

The Android operating system has increased in popularity and has been increasing its shares in the smart phone market. Users can carry out their daily work such as paying bills, being social, and sharing photos through mobile applications. These applications have access to sensitive information about the user, such as location, contacts, call logs, and SMS messages. However, the users have no knowledge of the applications or the personal information these applications have access to. Even if an application is not malware or does not have malicious behavior, it can compromise the security and privacy of the user by accessing …

การพัฒนาต้นแบบโครงข่ายเซ็นเซอร์ไร้สายสำหรับการทำเกษตรแม่นยำในเรือนเพาะปลูก, กฤษฎี วิทิตศานต์

Chulalongkorn University Theses and Dissertations (Chula ETD)

วิทยานิพนธ์ฉบับนี้นำเสนอการพัฒนาต้นแบบระบบโครงข่ายเซ็นเซอร์ไร้สายสำหรับการทำเกษตรแม่นยำในเรือนเพาะปลูก ภายในระบบประกอบไปด้วยเซ็นเซอร์ต่างๆสำหรับใช้วัดค่าพารามิเตอร์มาเป็นตัวแปรในการควบคุมอุปกรณ์ปรับสภาพแวดล้อม โดยระบบนี้ใช้เทคโนโลยีการสื่อสารและการควบคุมที่ใช้โดยทั่วไปรวมถึงการออกแบบให้เหมาะสมแก่การใช้งานภายในเรือนเพาะปลูกที่สามารถควบคุมปัจจัยหรือค่าพารามิเตอร์ต่างๆได้ง่ายกว่าพื้นที่เพาะปลูกแบบเปิด ส่วนต่างๆของระบบสามารถสื่อการกันได้โดยมี Raspberry pi เป็นเกตเวย์และเป็นส่วนประมวลผลหลักซึ่งใช้การสื่อสารกับอุปกรณ์อื่นด้วย UDP โพรโทคอลผ่านการเชื่อมต่อแบบ Wi-Fi ข้อมูลค่าพารามิเตอร์ที่ผ่านเข้ามาซึ่งเก็บได้จากเซ็นเซอร์จะนำไปเก็บไว้บนคลาวด์เซิร์ฟเวอร์ ระบบมีการนำกระบวนการตัดสินใจแบบ Fuzzy logic เข้ามาประยุกต์ใช้เพื่อควบคุมอุปกรณ์ปรับสภาพให้พื้นที่เพาะปลูกอยู่ในภาวะเหมาะสม ระบบนี้สามารถเฝ้าดูค่าพารามิเตอร์ต่างๆผ่านทางเว็บบราวเซอร์บนโครงข่ายอินเทอร์เน็ต ความได้เปรียบด้านการใช้งานเทคโนโลยี Wi-Fi คือความมีบทบาทอย่างกว้างขวางในปัจจุบันและอุปกรณ์ที่ออกมารองรับมากขึ้นเรื่อยๆจึงมีโอกาสพัฒนาต่อยอดได้ง่าย

Nano-Magnetic Resonance Imaging (Nano-Mri) Gives Personalized Medicine A New Perspective, Lorenzo Rosa, Jonathan Blackledge, Albert Boretti

Articles

This paper reviews some of the major and most recent advances in nanoscale-magnetic resonance imaging (nano-MRI) for personalized medicine (PM). Nano-MRI may drastically expand the capabilities of the traditional magnetic resonance images (MRI), down to the nanometer scale and possibly, in the near future, at the atomic scale. Nano-MRI is potentially able to observe structures which cannot be seen using today’s molecular imaging, with sensitivities of many billions of times better than MRI as currently used in hospitals, for example. The paper briefly reports on the foremost research themes in nano-MRI.

Operational Analysis Of Improved Γ-Z-Source Inverter With Clamping Diode And Its Comparative Evaluation, Zeeshan Aleem, Mohamed Moin Hanif

Articles

Due to a substantial shortage of conventional energy sources, the utilization of renewable energy is gaining attention. Power converters form interfaces to provide power from renewable energy sources to end user systems. Impedance-source inverters (ZSIs) have become a research hotspot and are widely used to overcome the drawbacks of conventional voltage-source inverters and current-source inverters such as two-stage power conversion and less immunity to electromagnetic interference noises. This paper presents various transformer-based ZSIs mainly classified as trans-ZSIs, improved trans-ZSIs, inductor-capacitor-capacitor transformer ZSI, TZSIs, and their comparisons with a new family of ZSIs called Γ-Z-source inverters (ΓZSI). Full operational analysis of …

Grid Voltage Sensorless Single-Phase Half-Bridge Active Filter And Dc Bus Voltage Regulation, Samet Biricik

Articles

In this paper, a method is presented for the control of grid voltage sensorless single-phase half-bridge shunt active power filter to reduce the grid current harmonics of low-power single-phase non-linear loads. The proposed system forces the grid current to be sinusoidal without sensing and processing the grid voltage on the line. For this reason, instead of grid voltage the load current is processed by using self-tuning filter to generate reference grid current to eliminate current harmonic distortions. In order to design a low-cost system, a half-bridge voltage source converter is used to reduce driver circuits. In addition, the switching losses …

Safety Airway For Small Unmanned Aerial Vehicles Using A Gas Particles Behavior Analogy, Pablo Rangel

Open Access Theses & Dissertations

The United States Federal Aviation Administration (FAA) implemented the Part 107 legislation to allow the flight of Unmanned Aerial Vehicles (UAV) for commercial use (i.e. package deliveries, power transmission line inspections, etc.) in the National Airspace System (NAS). As a consequence of the newly introduced rules, there is an increased risk for accidents involving injured bystanders or damaged to property. The work within this document defines a UAV to UAV safety distance model that acts as a range sensor enabled "elastic bubble". The length of the UAV safety bubble contracts and expands upon changing airway wind speed conditions. It also …

Optimization Of Collagen Microneedle Using Taguchi Method, Abhilash Aditya

Open Access Theses & Dissertations

Research is conducted to create dissolving collagen microneedles and to optimize the parameters for close to perfect dimension microneedles. A collagen microneedle patch has been developed with a micro-manufacturing process (micro-molding process). The collagen microneedles, varying in length from 300 to 600-μm may reach different targeted layers of the skin depending on the application. As the microneedles penetrate the skin they dissolve, delivering collagen through the epidermis. Such addition of collagen directly to the dermis layers allows it to be absorbed, increasing skin's strength and resilience, since it is one of the natural components of the younger looking skin. This …

Power System Distributed Dynamic State Prediction, Md Ashfaqur Rahman, Ganesh Kumar Venayagamoorthy

Publications

The security of the power system can be enhanced with the prediction of the dynamic state variables. To increase the security, a distributed predictor is developed based on the Elman Recurrent Neural Network (ERNN) in this study. To develop a scalable distributed predictor, the whole network is divided in a number of ERNNs. They take the current and the previous actual states from its own and its neighbors to predict the near future values of the states. The concept is inspired from the Cellular Computational Network (CCN) framework. Each ERNN is a cell in the CCN framework. Through simulation, the …

Photovoltaic Cooking In The Developing World, Tyler Watkins, Christopher O'Day, Omar Arriaga

Mechanical Engineering

The challenge of clean cooking is faced by hundreds of millions of people worldwide. We present a cooking technology consisting of a solar panel directly connected to an electric heater in a well-insulated chamber. Assuming continued decrease in solar panel prices, we anticipate that in a few decades Solar Electric Cooking technologies will be the most common cooking technology for the poor. Appropriate use of insulation reduces the power demand making low-power Insulated Solar Electric Cooking systems already cost competitive.