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Electrical Engineering

2015

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Articles 1 - 30 of 98

Full-Text Articles in Engineering

Determining Hydrodynamic Forces In Bursting Bubbles Using Dna Nanotube Mechanics, Rizal F. Hariadi, Erik Winfree, Bernard Yurke Nov 2015

Determining Hydrodynamic Forces In Bursting Bubbles Using Dna Nanotube Mechanics, Rizal F. Hariadi, Erik Winfree, Bernard Yurke

Materials Science and Engineering Faculty Publications and Presentations

Quantifying the mechanical forces produced by fluid flows within the ocean is critical to understanding the ocean’s environmental phenomena. Such forces may have been instrumental in the origin of life by driving a primitive form of self-replication through fragmentation. Among the intense sources of hydrodynamic shear encountered in the ocean are breaking waves and the bursting bubbles produced by such waves. On a microscopic scale, one expects the surface-tension–driven flows produced during bubble rupture to exhibit particularly high velocity gradients due to the small size scales and masses involved. However, little work has examined the strength of shear ...


Importance Of Energy Efficiency In Power Engineering, Ines Bula, Edin Bula, Diellza Berisha Nov 2015

Importance Of Energy Efficiency In Power Engineering, Ines Bula, Edin Bula, Diellza Berisha

UBT International Conference

This paper aims to show the importance of energy efficiency in the power engineering, that it is essential to all areas of the economy and society, as well as for the environment. While saving energy always involves certain sacrifices from the usual habits, efficient use of energy has led to increased quality of life, greater competitiveness of companies and the economy as well as energy security. Energy sources that are most in use today are based on the combustion of fossil fuels, and supplies of these fuels have their limitations and should be used more efficiently, thus improving energy efficiency ...


Dna-Mediated Excitonic Upconversion Fret Switching, Donald L. Kellis, Sarah M. Rehn, Brittany L. Cannon, Paul H. Davis, Elton Graugnard, Jeunghoon Lee, Bernard Yurke, William B. Knowlton Nov 2015

Dna-Mediated Excitonic Upconversion Fret Switching, Donald L. Kellis, Sarah M. Rehn, Brittany L. Cannon, Paul H. Davis, Elton Graugnard, Jeunghoon Lee, Bernard Yurke, William B. Knowlton

Materials Science and Engineering Faculty Publications and Presentations

Excitonics is a rapidly expanding field of nanophotonics in which the harvesting of photons, ensuing creation and transport of excitons via Förster resonant energy transfer (FRET), and subsequent charge separation or photon emission has led to the demonstration of excitonic wires, switches, Boolean logic and light harvesting antennas for many applications. FRET funnels excitons down an energy gradient resulting in energy loss with each step along the pathway. Conversely, excitonic energy upconversion via upconversion nanoparticles (UCNPs), although currently inefficient, serves as an energy ratchet to boost the exciton energy. Although FRET-based upconversion has been demonstrated, it suffers from low FRET ...


Electrical & Computer Engineering News, Georgia Southern University Sep 2015

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering News

  • GS Electrical Engineering Graduate Student Receives Prestigious IEEE Travel Award


Smart Thermostat, Matt Allen, Sam Billett, Kevin Read Jun 2015

Smart Thermostat, Matt Allen, Sam Billett, Kevin Read

Electrical Engineering Senior Theses

The current thermostat marketplace is dominated by programmable thermostats that are engineered to give the user as much control as possible. However, not all users program these thermostats optimally. Some prefer comfort over energy efficiency and will heat an empty house. Others do not care to program their thermostat and leave it at a set temperature. The Smart Thermostat that we have created is engineered to optimize the temperature for the user, using the common sense of the engineer to lower energy consumption. It uses a Raspberry Pi as a platform to implement a fuzzy logic control System. By removing ...


Pilot-1: Autonomous Fixed-Wing Aircraft Control System, Chris Millsap, Nathan Garvey, Faisal Hayat Jun 2015

Pilot-1: Autonomous Fixed-Wing Aircraft Control System, Chris Millsap, Nathan Garvey, Faisal Hayat

Interdisciplinary Design Senior Theses

In the past decade, the personal ownership of unmanned aerial vehicles has exploded in the US and around the world. The rapidly declining size and cost of integrated circuits, sensors and embedded micro-controllers has lead to a flourishing community of hobbyists designing flight controllers with levels of sophistication approaching those for government and military applications. The typical flight assisted controllers integrate data from the user's control system and an Inertial Measurement Unit (IMU) in order to keep the craft level and on course. Deriving mostly from the radio controlled (RC) hobby industry, the flight control technologies for both rotary ...


Rsl Autonomous Rover, Cris Madrigal, Jiachi Zhang, Nicholas Peacock, Brogan O'Hara Jun 2015

Rsl Autonomous Rover, Cris Madrigal, Jiachi Zhang, Nicholas Peacock, Brogan O'Hara

Interdisciplinary Design Senior Theses

Autonomous vehicles are useful for a variety of applications such as military, urban, and agricultural environments. This paper discusses adding an autonomous navigation system to an all-terrain vehicle by implementing controllers that interface with its current system, installing sensors on the vehicle for obstacle detection, and developing effective safety mechanisms to prevent injury to others. The result is a vehicle capable of waypoint navigation and obstacle avoidance. Testing the vehicle showed that the LIDAR and the autonomous navigation system were integrated seamlessly, and that the sensor output signals were successfully translated into vehicle commands the existing system uses. This system ...


Might-E Wheel, Abigail Grills, Daniel Doke, Jared O'Rourke, Zach Jesberger Jun 2015

Might-E Wheel, Abigail Grills, Daniel Doke, Jared O'Rourke, Zach Jesberger

Interdisciplinary Design Senior Theses

Electric bikes are proving to be an increasingly reliable source of transportation, but with large price tags and existing conversion kits proving too complicated and unapproachable for the average user, commuters are failing to consider electric bicycles as an option. A prototype of a wireless, rear-wheel replacement to convert a bicycle from manual to full-power electric was built. This motorized wheel is called Might-E Wheel. Might-E Wheel was designed as the most approachable and user-friendly way to convert a bicycle from manual to full-power electric. Might-E Wheel was able to achieve a top speed of 27.5 km/h, a ...


Mobile Music: A Musical Therapy Assistance Device, Alex Hildebrand, Tanner Malkoff Jun 2015

Mobile Music: A Musical Therapy Assistance Device, Alex Hildebrand, Tanner Malkoff

Interdisciplinary Design Senior Theses

Children suffering from Cerebral Palsy often undergo gait therapy in order to strengthen and coordinate their trunks and legs. The patients often feel unmotivated to perform their gait training because the physical movements associated with it are difficult and there is no immediate reward. Physical therapists (PT) will often play music as an incentive to get the children focused on their physical therapy, but this is inefficient and impedes the PT from analyzing and tuning the patients' gait. Mobile Music is a small device designed for automating musical therapy during gait training. In this paper, we go through several design ...


Dynamic Capacitor Bank, J. Daniel Mendoza, Peter Roguski Jun 2015

Dynamic Capacitor Bank, J. Daniel Mendoza, Peter Roguski

Electrical Engineering Senior Theses

Low power factor systems run inefficiently and cause power companies to lose thousands of dollars with wasted power. Correction systems currently implement static capacitor solutions to offset this power factor; however, companies where the power factor varies significantly need a better solution. In this paper, we discuss a reactive power factor correction system that could greatly benefit companies with this problem. The system is in its prototype state, which comprises of a capacitor bank, sensing circuit, a switching circuit and a microprocessor; we named it the Dynamic Capacitor Bank. During our project, we were able to get a sensing circuit ...


Uavino, Matthew Belesiu, Aaron Chung, Kirby Linvill, Nathan Carlson, Phillip Coyle, Megan Peekema Jun 2015

Uavino, Matthew Belesiu, Aaron Chung, Kirby Linvill, Nathan Carlson, Phillip Coyle, Megan Peekema

Interdisciplinary Design Senior Theses

UAVino is a drone solution that uses aerial imagery to determine the overall plant health and water content of vineyards. In general, the system focuses on automating crop inspection by taking aerial imagery of a vineyard, conducting post-processing, and outputting an easily interpreted map of the vineyard's overall health. The project's key innovation is an auto-docking system that allows the drone to automatically return to its launch point and recharge in order to extend mission duration. Long term, UAVino is envisioned as a multi-year, interdisciplinary project involving both the Santa Clara University Robotics Systems Laboratory and local wineries ...


Aquasift: Point-Of-Use Microfluidic Detection System, Daniel Beyers, Jasper Tan, Brandon Young Jun 2015

Aquasift: Point-Of-Use Microfluidic Detection System, Daniel Beyers, Jasper Tan, Brandon Young

Interdisciplinary Design Senior Theses

AquaSift is a portable, affordable, point-of-use system that performs microfluidic detection of contaminants in drinking water. It comprises four main components: a three-electrode sensor, a potentiostat circuit device, an Android application, and an online database. It utilizes three-electrode voltammetry by applying a voltage stimulus across the electrodes and reading the induced current on the water sample. Testing has shown that our system is able to detect arsenic in solution samples. The Android application serves as the user interface to the system, and the online database allows the mapping of test results on an easy-to-use website.


Thin Film Based Biocompatible Sensors For Physiological Monitoring, Yihao Zhu May 2015

Thin Film Based Biocompatible Sensors For Physiological Monitoring, Yihao Zhu

Theses and Dissertations

The development and evolution of physiological sensors, from wearable to implantable, has enabled long term continuous physiological monitoring, making possible for the out-of-clinic treatment and management of many chronic illnesses, mental health issues and post-surgery recovery. This technology advance is gradually changing the definition of health care and the way it is delivered, from clinic/emergency room to patient’s own environment. In this dissertation, three general types of sensors have been proposed for physiological monitoring of blood pressure, oxygen content and electrolyte ion concentration level in human body, respectively. The study proved the device concepts and shows promising results ...


Crystal Growth, Characterization And Anisotropic Electrical Properties Of Gase Single Crystals For Thz Source And Radiation Detector Applications, K. C. Mandal, C. Noblitt, M. Choi, A. Smirnov, R. D. Rauh May 2015

Crystal Growth, Characterization And Anisotropic Electrical Properties Of Gase Single Crystals For Thz Source And Radiation Detector Applications, K. C. Mandal, C. Noblitt, M. Choi, A. Smirnov, R. D. Rauh

Krishna C. Mandal

The single crystal growth of large semi‐insulating GaSe by the vertical Bridgman technique using zone‐refined selenium (Se) and HP gallium (Ga) is described. The grown crystals (up to 10 cm long and 2.5 cm diameter) have been characterized thoroughly by X‐ray diffraction (XRD), energy dispersive analysis by x‐rays (EDAX), optical absorption/transmission, X‐ray photoelectron spectroscopy (XPS), charge carrier electrical property measurements, second harmonic test, and radiation detection measurements.


Optical Down-Conversion In Doped Znse:Tb3+ Nanocrystals, Sandip Das, K. C. Mandal Apr 2015

Optical Down-Conversion In Doped Znse:Tb3+ Nanocrystals, Sandip Das, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Biparametric Analyses Of Charge Trapping In Cd0.9Zn0.1Te Based Virtual Frisch Grid Detectors, S. K. Chaudhuri, K. J. Zavalla, R. M. Krishna, K. C. Mandal Apr 2015

Biparametric Analyses Of Charge Trapping In Cd0.9Zn0.1Te Based Virtual Frisch Grid Detectors, S. K. Chaudhuri, K. J. Zavalla, R. M. Krishna, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Defect Levels In Cu₂Znsn(SₓSe₁₋ₓ)₄ Solar Cells Probed By Current-Mode Deep Level Transient Spectroscopy, S. Das, S. K. Chaudhuri, R. N. Bhattacharya, K. C. Mandal Apr 2015

Defect Levels In Cu₂Znsn(SₓSe₁₋ₓ)₄ Solar Cells Probed By Current-Mode Deep Level Transient Spectroscopy, S. Das, S. K. Chaudhuri, R. N. Bhattacharya, K. C. Mandal

Krishna C. Mandal

No abstract provided.


X-Ray Photoemission Analysis Of Chemically Treated Gate Semiconductor Surfaces For Radiation Detector Applications, A. J. Nelson, A. M. Conway, B. W. Sturm, E. M. Behymer, C. E. Reinhardt, R. J. Nikolic, S. A. Payne, G. Pabst, K. C. Mandal Apr 2015

X-Ray Photoemission Analysis Of Chemically Treated Gate Semiconductor Surfaces For Radiation Detector Applications, A. J. Nelson, A. M. Conway, B. W. Sturm, E. M. Behymer, C. E. Reinhardt, R. J. Nikolic, S. A. Payne, G. Pabst, K. C. Mandal

Krishna C. Mandal

No abstract provided.


In Situ Infrared Evidence For The Electrochemical Incorporation Of Hydrogen Into Si And Ge, K. C. Mandal, F. Ozanam, J.-N. Chazalviel Apr 2015

In Situ Infrared Evidence For The Electrochemical Incorporation Of Hydrogen Into Si And Ge, K. C. Mandal, F. Ozanam, J.-N. Chazalviel

Krishna C. Mandal

No abstract provided.


Highly Sensitive X-Ray Detectors In The Low-Energy Range On N-Type 4h-Sic Epitaxial Layers, K. C. Mandal, P. G. Muzykov, J. R. Terry Apr 2015

Highly Sensitive X-Ray Detectors In The Low-Energy Range On N-Type 4h-Sic Epitaxial Layers, K. C. Mandal, P. G. Muzykov, J. R. Terry

Krishna C. Mandal

No abstract provided.


Investigation Of Cdznte Crystal Defects Using Scanning Probe Microscopy, Goutam Koley, J. Liu, K. C. Mandal Apr 2015

Investigation Of Cdznte Crystal Defects Using Scanning Probe Microscopy, Goutam Koley, J. Liu, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Biparametric Analyses Of Charge Trapping In Cd0.9Zn0.1Te Based Virtual Frisch Grid Detectors, S. K. Chaudhuri, K. J. Zavalla, R. M. Krishna, K. C. Mandal Apr 2015

Biparametric Analyses Of Charge Trapping In Cd0.9Zn0.1Te Based Virtual Frisch Grid Detectors, S. K. Chaudhuri, K. J. Zavalla, R. M. Krishna, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Evidence For Amphoteric Behavior Of Ru On Cdte Surfaces, D. N. Bose, S. Basu, K. C. Mandal, D. Mazumdar Apr 2015

Evidence For Amphoteric Behavior Of Ru On Cdte Surfaces, D. N. Bose, S. Basu, K. C. Mandal, D. Mazumdar

Krishna C. Mandal

No abstract provided.


Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal, B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal Apr 2015

Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal, B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Characterizations Of Antimony Tri‐Sulfide Chemically Deposited With Silicotungstic Acid, O. Savadogo, K. C. Mandal Apr 2015

Characterizations Of Antimony Tri‐Sulfide Chemically Deposited With Silicotungstic Acid, O. Savadogo, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Erratum: “Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal” [Appl. Phys. Lett.87, 182104 (2005)], B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal Apr 2015

Erratum: “Terahertz Studies Of The Dielectric Response And Second-Order Phonons In A Gase Crystal” [Appl. Phys. Lett.87, 182104 (2005)], B. L. Yu, F. Zeng, V. Kartazayev, R. R. Alfano, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Investigation Of Cdznte Crystal Defects Using Scanning Probe Microscopy, Goutam Koley, J. Liu, K. C. Mandal Apr 2015

Investigation Of Cdznte Crystal Defects Using Scanning Probe Microscopy, Goutam Koley, J. Liu, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Biparametric Analyses Of Charge Trapping In Cd0.9Zn0.1Te Based Virtual Frisch Grid Detectors, S. K. Chaudhuri, K. J. Zavalla, R. M. Krishna, K. C. Mandal Apr 2015

Biparametric Analyses Of Charge Trapping In Cd0.9Zn0.1Te Based Virtual Frisch Grid Detectors, S. K. Chaudhuri, K. J. Zavalla, R. M. Krishna, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Characterization Of Deep Levels In N-Type And Semi-Insulating 4h-Sic Epitaxial Layers By Thermally Stimulated Current Spectroscopy, P. G. Muzykov, Ramesh Madhu Krishna, K. C. Mandal Apr 2015

Characterization Of Deep Levels In N-Type And Semi-Insulating 4h-Sic Epitaxial Layers By Thermally Stimulated Current Spectroscopy, P. G. Muzykov, Ramesh Madhu Krishna, K. C. Mandal

Krishna C. Mandal

No abstract provided.


Defect Levels In Cu₂Znsn(SₓSe₁₋ₓ)₄ Solar Cells Probed By Current-Mode Deep Level Transient Spectroscopy, S. Das, S. K. Chaudhuri, R. N. Bhattacharya, K. C. Mandal Apr 2015

Defect Levels In Cu₂Znsn(SₓSe₁₋ₓ)₄ Solar Cells Probed By Current-Mode Deep Level Transient Spectroscopy, S. Das, S. K. Chaudhuri, R. N. Bhattacharya, K. C. Mandal

Krishna C. Mandal

No abstract provided.