Open Access. Powered by Scholars. Published by Universities.®

Electrical and Computer Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

21466 Full-Text Articles 23509 Authors 8255962 Downloads 162 Institutions

All Articles in Electrical and Computer Engineering

Faceted Search

21466 full-text articles. Page 1 of 615.

Csar 62 Spin Curve, Mohsen Azadi, Georgia Griggs, Glen de Villafranca, Gerald Lopez 2018 Singh Center for Nanotechnology

Csar 62 Spin Curve, Mohsen Azadi, Georgia Griggs, Glen De Villafranca, Gerald Lopez

Protocols and Reports

No abstract provided.


Hybrid Sensorless Field Oriented And Direct Torque Control For Variable Speed Brushless Dc Motors, Kellen Carey 2018 Marquette University

Hybrid Sensorless Field Oriented And Direct Torque Control For Variable Speed Brushless Dc Motors, Kellen Carey

Master's Theses (2009 -)

The objective of this thesis is to design a hybrid sensorless closed-loop motor controller using a combination of Field-Oriented Control (FOC) and Direct Torque Control (DTC) for brushless DC motors used in multi-rotor aerial vehicles. The primary challenge is the wide range of desired working speeds, which can quickly vary from low speed to high speed. For this range, the control approach must be efficient, effective, and low-cost in order to provide fast response times during initial startup, steady-state, and transient operation. Additional design challenges include minimal response time to desired speed changes and small steady-state speed errors. Finally, the ...


Damage Analysis Modified Trac Computer Program (Damtrac), George H. Baker III, Alan D. McNutt, G. Bradford Shea, David M. Rubenstein 2018 James Madison University

Damage Analysis Modified Trac Computer Program (Damtrac), George H. Baker Iii, Alan D. Mcnutt, G. Bradford Shea, David M. Rubenstein

George H Baker

A computer program tailored for EMP damage analysis of solid-state circuitry has been developed by modifying the existing TRAC network analysis program. Modification of the TRAC diode and transistor models to include breakdown parameters and the addition of a semiconductor device parameter library have greatly simplified the analyst's task. An added feature is a subroutine that automatically calculates the amplitude and duration of transient power dissipated in electronic circuit components.


Inventing Around Edison’S Lamp Patent: The Role Of Patents In Stimulating Downstream Development And Competition, Ron D. Katznelson, John Howells 2018 Bi-Level Technologies

Inventing Around Edison’S Lamp Patent: The Role Of Patents In Stimulating Downstream Development And Competition, Ron D. Katznelson, John Howells

Ron D. Katznelson

We provide the first detailed empirical study of inventing around patent claims.  The enforcement of Edison’s incandescent lamp patent in 1891-1894 stimulated a surge of patenting. Most of these later patents disclosed inventions around the Edison patent.  Some of these patents introduced important new technology in their own right and became prior art for new fields, indicating that invention around patents contributes to dynamic efficiency.  Contrary to widespread contemporary understanding, the Edison lamp patent did not suppress technological advance in electric lighting.  The market position of General Electric (“GE”), the Edison patent-owner, weakened through the period of this patent ...


Tech Report: Fly-By-Logic: Control Of Multi-Drone Fleets With Temporal Logic Objectives, Yash Vardhan Pant, Houssam Abbas, Rhudii A. Quaye, Rahul Mangharam 2018 University of Pennsylvania

Tech Report: Fly-By-Logic: Control Of Multi-Drone Fleets With Temporal Logic Objectives, Yash Vardhan Pant, Houssam Abbas, Rhudii A. Quaye, Rahul Mangharam

Real-Time and Embedded Systems Lab (mLAB)

The problem of safe planning and control for multi- drone systems across a variety of missions is of critical importance, as the scope of tasks assigned to such systems increases. In this paper, we present an approach to solve this problem for multi-quadrotor missions. Given a mission expressed in Signal Temporal Logic (STL), our controller maximizes robustness to generate trajectories for the quadrotors that satisfy the STL specification in continuous-time. We also show that the constraints on our optimization guarantees that these trajectories can be tracked nearly perfectly by lower level off-the-shelf position and attitude controllers. Our approach avoids the ...


Real Time Bridge Scour Monitoring With Magneto-Inductive Field Coupling, Andriy V. Radchenko, David Pommerenke, Genda Chen, Pratik Maheshwari, Satyajeet R. Shinde, Viswa Pilla, Y. Rosa Zheng 2018 Missouri University of Science and Technology

Real Time Bridge Scour Monitoring With Magneto-Inductive Field Coupling, Andriy V. Radchenko, David Pommerenke, Genda Chen, Pratik Maheshwari, Satyajeet R. Shinde, Viswa Pilla, Y. Rosa Zheng

Genda Chen

Scour was responsible for most of the U.S. bridges that collapsed during the past 40 years. The maximum scour depth is the most critical parameter in bridge design and maintenance. Due to scouring and refilling of river-bed deposits, existing technologies face a challenge in measuring the maximum scour depth during a strong flood. In this study, a new methodology is proposed for real time scour monitoring of bridges. Smart Rocks with embedded electronics are deployed around the foundation of a bridge as field agents. With wireless communications, these sensors can send their position change information to a nearby mobile ...


Modelling Robustness Of Critical Infrastructure Networks, Srinath Pinnaka, Rajgopal Yarlagadda, Egemen K. Çetinkaya 2018 Missouri University of Science and Technology

Modelling Robustness Of Critical Infrastructure Networks, Srinath Pinnaka, Rajgopal Yarlagadda, Egemen K. Çetinkaya

Egemen K. Çetinkaya

No abstract provided.


Network Resilience Improvement Using Link Additions, Mohammed J. F. Alenazi, Egemen K. Çetinkaya, James P. G. Sterbenz 2018 Missouri University of Science and Technology

Network Resilience Improvement Using Link Additions, Mohammed J. F. Alenazi, Egemen K. Çetinkaya, James P. G. Sterbenz

Egemen K. Çetinkaya

No abstract provided.


Network Attack Experimentation Using Openflow-Enabled Geni Testbed, Mani Chaitanya Gorla, Venu Madhav Kamaraju, Egemen K. Çetinkaya 2018 Missouri University of Science and Technology

Network Attack Experimentation Using Openflow-Enabled Geni Testbed, Mani Chaitanya Gorla, Venu Madhav Kamaraju, Egemen K. Çetinkaya

Egemen K. Çetinkaya

No abstract provided.


Resilience Modelling Of Networks Against Adaptive Challenges, Egemen K. Çetinkaya, Justin P. Rohrer, James P. G. Sterbenz 2018 Missouri University of Science and Technology

Resilience Modelling Of Networks Against Adaptive Challenges, Egemen K. Çetinkaya, Justin P. Rohrer, James P. G. Sterbenz

Egemen K. Çetinkaya

No abstract provided.


Modelling Challenges And Attacks To Wireless Networks, Dongsheng Zhang, Santosh Ajith Gogi, Dan S. Broyles, Egemen K. Çetinkaya, James P. G. Sterbenz 2018 Missouri University of Science and Technology

Modelling Challenges And Attacks To Wireless Networks, Dongsheng Zhang, Santosh Ajith Gogi, Dan S. Broyles, Egemen K. Çetinkaya, James P. G. Sterbenz

Egemen K. Çetinkaya

A thorough understanding of the network behaviour when exposed to challenges is of paramount importance to construct a resilient MANET (mobile ad hoc network). However, modelling mobile and wireless networks as well as challenges against them is non-trivial due to dynamic and intermittent connectivity caused by channel fading and mobility of the nodes. We treat MANETs as time-varying graphs (TVGs) represented as a weighted adjacency matrix, in which the weights denote the link availability. We present how centrality-based attacks could affect network performance for different routing protocols. Furthermore, we model propagation loss models that represent realistic area-based challenges in wireless ...


Resilience Experiments On The Gpeni Testbed, Egemen K. Çetinkaya, Dongsheng Zhang, Mohammed J. F. Alenazi, Yufei Cheng, Parker Riley, James P. G. Sterbenz 2018 Missouri University of Science and Technology

Resilience Experiments On The Gpeni Testbed, Egemen K. Çetinkaya, Dongsheng Zhang, Mohammed J. F. Alenazi, Yufei Cheng, Parker Riley, James P. G. Sterbenz

Egemen K. Çetinkaya

No abstract provided.


Multilayer Network Resilience Analysis And Experimentation On Geni, Justin P. Rohrer, Egemen K. Çetinkaya, James P. G. Sterbenz 2018 Missouri University of Science and Technology

Multilayer Network Resilience Analysis And Experimentation On Geni, Justin P. Rohrer, Egemen K. Çetinkaya, James P. G. Sterbenz

Egemen K. Çetinkaya

GENI is evolving to provide a promising environment in which to do experimental research in the resilience and survivability of future networks, by allowing programmable control over topology and mechanism, while providing the scale and global reach needed to conduct network experiments far beyond the capabilities of a conventional testbed. We will use GENI in general, and the GpENI infrastructure (expanding to 40 clusters with 200 nodes worldwide), federated with the larger GENI PlanetLab control framework and interconnected to several ProtoGENI facilities to perform resilience and survivability experiments at scale, both in terms of node count and with the geographic ...


Internet Of Underground Things: Sensing And Communications On The Field For Precision Agriculture, Mehmet C. Vuran, Abdul Salam, Rigoberto Wong, Suat Irmak 2018 University of Nebraska-Lincoln

Internet Of Underground Things: Sensing And Communications On The Field For Precision Agriculture, Mehmet C. Vuran, Abdul Salam, Rigoberto Wong, Suat Irmak

CSE Conference and Workshop Papers

The projected increases in World population and need for food have recently motivated adoption of information technology solutions in crop fields within precision agriculture approaches. Internet of underground things (IOUT), which consists of sensors and communication devices, partly or completely buried underground for real-time soil sensing and monitoring, emerge from this need. This new paradigm facilitates seamless integration of underground sensors, machinery, and irrigation systems with the complex social network of growers, agronomists, crop consultants, and advisors. In this paper, state-of-the-art communication architectures are reviewed, and underlying sensing technology and communication mechanisms for IOUT are presented. Recent advances in the ...


Real-Time Variable Multidelay Controller For Multihazard Mitigation, Ling Cao, Simon Laflamme 2018 Iowa State University

Real-Time Variable Multidelay Controller For Multihazard Mitigation, Ling Cao, Simon Laflamme

Civil, Construction and Environmental Engineering Publications

High performance control systems (HPCS), including semiactive, active, and hybrid damping systems, are effective solutions to increase structural performance versus multihazard excitations. However, the implementation of HPCS within structural systems is still in its infancy, because of the complexity in designing a robust closed-loop control system that can ensure reliable and high mitigation performance. To overcome this challenge, a new type of controller with high adaptive capabilities is proposed. The control algorithm is based on real-time embedding of measurements to minimally represent the essential dynamics of the controlled system, therefore providing adaptive input space capabilities. This type of controller is ...


A High Gain Dc-Dc Full-Bridge Converter, Prashanth Prabhu 2018 The University of Western Ontario

A High Gain Dc-Dc Full-Bridge Converter, Prashanth Prabhu

Electronic Thesis and Dissertation Repository

High gain DC-DC converters have become increasingly popular in recent years as there is greater need to interface low voltage DC sources such as solar cells and batteries with much higher voltage DC buses. A new high gain DC-DC converter with high gain, galvanic isolation and an integrated passive snubber network is proposed in the thesis. In the thesis, the general operation of the converter is discussed, its modes of operation are explained and its features are reviewed. The design of the converter is then discussed and a set of general guidelines that can be used in the design are ...


Identification Of Unique Features And Exploration Of Leap Motion Controller For Detecting Hand Hygiene Stages, Rashmi Bakshi, Jane Courtney, Damon Berry, Graham Gavin 2018 Dublin Institute of Technology

Identification Of Unique Features And Exploration Of Leap Motion Controller For Detecting Hand Hygiene Stages, Rashmi Bakshi, Jane Courtney, Damon Berry, Graham Gavin

Conference Papers

Hospital acquired infections (HAIs) are contracted by the patients during the hospital stay. Antibiotic resistant microbes are the major cause and spread due to the contaminated medical equipment, crowded hospitals, frequent transfer of patients from one unit to another and poor hand hygiene. [1] In high income countries, approximately 30% of patients in intensive care units are affected by at least one HAI. [2] Hand hygiene is identified as a measure to prevent cross-transmission and to reduce the rate of HAI. [3] Technology is now used as a means of assessing hand hygiene compliance. Current approaches involve the use of ...


A Cmos Synapse Design Implementing Tunable Asymmetric Spike Timing-Dependent Plasticity, Robert C. Ivans, Kurtis D. Cantley, Justin L. Shumaker 2018 Boise State University

A Cmos Synapse Design Implementing Tunable Asymmetric Spike Timing-Dependent Plasticity, Robert C. Ivans, Kurtis D. Cantley, Justin L. Shumaker

Kurtis D. Cantley

A CMOS synapse design is presented which can perform tunable asymmetric spike timing-dependent learning in asynchronous spiking neural networks. The overall design consists of three primary subcircuit blocks, and the operation of each is described. Pair-based Spike Timing-Dependent Plasticity (STDP) of the entire synapse is then demonstrated through simulation using the Cadence Virtuoso platform. Tuning of the STDP curve learning window and rate of synaptic weight change is possible using various control parameters. With appropriate settings, it is shown the resulting learning rule closely matches that observed in biological systems.


Deep Gaze Velocity Analysis During Mammographic Reading For Biometric Identification Of Radiologists, Hong-Jun Yoon, Folami Alamudun, Kathy Hudson, Garnetta Morin-Ducote, Georgia Tourassi 2018 Biomedical Sciences, Engineering, and Computing Group Health Data Sciences Institute, Oak Ridge National Laboratory

Deep Gaze Velocity Analysis During Mammographic Reading For Biometric Identification Of Radiologists, Hong-Jun Yoon, Folami Alamudun, Kathy Hudson, Garnetta Morin-Ducote, Georgia Tourassi

Journal of Human Performance in Extreme Environments

Several studies have confirmed that the gaze velocity of the human eye can be utilized as a behavioral biometric or personalized biomarker. In this study, we leverage the local feature representation capacity of convolutional neural networks (CNNs) for eye gaze velocity analysis as the basis for biometric identification of radiologists performing breast cancer screening. Using gaze data collected from 10 radiologists reading 100 mammograms of various diagnoses, we compared the performance of a CNN-based classification algorithm with two deep learning classifiers, deep neural network and deep belief network, and a previously presented hidden Markov model classifier. The study showed that ...


Employing A User-Centered Design Process For Cybersecurity Awareness In The Power Grid, Jean C. Scholtz, Lyndsey Franklin, Aditya Ashok, Katya LeBlanc, Christopher Bonebrake, Eric Andersen, Michael Cassiadoro 2018 Pacific Northwest National Laboratory

Employing A User-Centered Design Process For Cybersecurity Awareness In The Power Grid, Jean C. Scholtz, Lyndsey Franklin, Aditya Ashok, Katya Leblanc, Christopher Bonebrake, Eric Andersen, Michael Cassiadoro

Journal of Human Performance in Extreme Environments

In this paper, we discuss the process we are using in the design and implementation of a tool to improve the situation awareness of cyberattacks in the power grid. We provide details of the steps we have taken to date and describe the steps that still need to be accomplished. The focus of this work is to provide situation awareness of the power grid to staff from different, non-overlapping roles in an electrical transmission organization in order to facilitate an understanding of a possible occurrence of a cyberattack. Our approach follows a user-centered design process and includes determining the types ...


Digital Commons powered by bepress