An X Band Patch Antenna Integrated With Commercial Triple-Junction Space Solar Cells, 2017 Utah State University
An X Band Patch Antenna Integrated With Commercial Triple-Junction Space Solar Cells, Taha Yekan, Reyhan Baktur
CEE Student Publications and Presentations
An X band patch antenna was integrated on top of the cover glass of commercial space-certified solar cell and was studied for understanding the interaction between the solar cell and the antenna. It was found that the solar cell acts as a lossy substrate for the antenna and reduces the gain of the antenna by about 2 dB, and such a reduction remains consistent for different working states of the solar cell. The patch antenna reduces the efficiency of the solar cells because it blocks light, however, at 10 GHz, the impact of a patch antenna alone to the solar ...
Product Authentication Using Hash Chains And Printed Qr Codes, 2017 South Dakota
Product Authentication Using Hash Chains And Printed Qr Codes, Harshith R. Keni
This thesis explores the usage of simple printed tags for authenticating products. Printed tags are a cheap alternative to RFID and other tag based systems and do not require specialized equipment. Due to the simplistic nature of such printed codes, many security issues like tag impersonation, server impersonation, reader impersonation, replay attacks and denial of service present in RFID based solutions need to be handled differently. An algorithm that utilizes hash chains to secure such simple tags while still keeping cost low is discussed. The security characteristics of this scheme as well as other product authentication schemes that use RFID ...
Sum-Networks From Undirected Graphs: Construction And Capacity Analysis View Document, 2017 Iowa State University
Sum-Networks From Undirected Graphs: Construction And Capacity Analysis View Document, Ardhendu Tripathy, Aditya Ramamoorthy
We consider a directed acyclic network with multiple sources and multiple terminals where each terminal is interested in decoding the sum of independent sources generated at the source nodes. We describe a procedure whereby a simple undirected graph can be used to construct such a sum-network and demonstrate an upper bound on its computation rate. Furthermore, we show sufficient conditions for the construction of a linear network code that achieves this upper bound. Our procedure allows us to construct sum-networks that have any arbitrary computation rate p/q (where p, q are non-negative integers). Our work significantly generalizes a previous ...
Sum-Networks From Incidence Structures: Construction And Capacity Analysis, 2017 Iowa State University
Sum-Networks From Incidence Structures: Construction And Capacity Analysis, Ardhendu Tripathy, Aditya Ramamoorthy
A sum-network is an instance of a network coding problem over a directed acyclic network in which each terminal node wants to compute the sum over a finite field of the information observed at all the source nodes. Many characteristics of the well-studied multiple unicast network communication problem also hold for sum-networks due to a known reduction between instances of these two problems. In this work, we describe an algorithm to construct families of sum-network instances using incidence structures. The computation capacity of several of these sum-network families is characterized. We demonstrate that unlike the multiple unicast problem, the computation ...
Capacity Of Sum-Networks For Different Message Alphabets, 2017 Iowa State University
Capacity Of Sum-Networks For Different Message Alphabets, Ardhendu Tripathy, Aditya Ramamoorthy
A sum-network is a directed acyclic network in which all terminal nodes demand the `sum' of the independent information observed at the source nodes. Many characteristics of the well-studied multiple-unicast network communication problem also hold for sum-networks due to a known reduction between instances of these two problems. Our main result is that unlike a multiple unicast network, the coding capacity of a sum-network is dependent on the message alphabet. We demonstrate this using a construction procedure and show that the choice of a message alphabet can reduce the coding capacity of a sum-network from 1 to close to 0.
Self-Directed Channel Memristor For High Temperature Operation, 2017 Boise State University
Self-Directed Channel Memristor For High Temperature Operation, Kristy A. Campbell
Electrical and Computer Engineering Faculty Publications and Presentations
Ion-conducting memristors comprised of the layered chalcogenide materials Ge2Se3/SnSe/Ag are described. The memristor, termed a self-directed channel (SDC) device, can be classified as a generic memristor and can tolerate continuous high temperature operation (at least 150 °C). Unlike other chalcogenide-based ion conducting device types, the SDC device does not require complicated fabrication steps, such as photodoping or thermal annealing, making these devices faster and more reliable to fabricate. Device pulsed response shows fast state switching in the 10−9 s range. Device cycling at both room temperature and 140 °C show write endurance of at ...
Can Additional Degrees-Of-Freedom From Faster-Than-Nyquist Signaling Be Used To Align Interference? (To Be Submitted To 2017 Ieee International Symposium On Information Theory), 2017 Rose-Hulman Institute of Technology
Can Additional Degrees-Of-Freedom From Faster-Than-Nyquist Signaling Be Used To Align Interference? (To Be Submitted To 2017 Ieee International Symposium On Information Theory), Yong Jin Daniel Kim, David Vargas
Faculty Publications - Electrical and Computer Engineering
Abstract—Faster-than-Nyquist (FTN) signaling is known to maximize the number of signaling dimensions in point-to-point and certain multiuser channels. In this work, we show that these dimensions can be exploited by interference alignment to provide additional degrees-of-freedom (DoF) in interference channels. By employing FTN signaling using a modulating pulse with roll-off factor β > 0, each user in 3-user frequency-selective interference channel is shown to achieve (1+β)/2 DoF as the number of symbols tends to infinity, which is a (1+β)-folds gain from the conventional interference alignment with orthogonal signaling. We also highlight practically achievable DoF when the ...
Nuclear Power: Black Sky Liability Or Black Sky Asset?, 2016 Advanced Technology Insights, LLC (ATI)
Nuclear Power: Black Sky Liability Or Black Sky Asset?, Sherrell R. Greene
International Journal of Nuclear Security
Ready access to abundant electricity is a key enabler of modern life. During the past decade the vulnerability of Critical Infrastructure sectors in the U.S. to a variety of natural hazards and man-made threats has become increasingly apparent. The electrical infrastructure (the “Grid”) is the foundation for all other critical civil infrastructures upon which our society depends. Therefore, protection of the Grid is an energy security, homeland security, and national security issue of highest importance. Geomagnetic disturbances (GMD) induced by solar coronal mass ejections (CMEs), electromagnetic pulse (EMP) attacks, and cyber attacks are three events having the potential to ...
Performance Analysis Of Grid-Connected Pv System, 2016 Minia University
Performance Analysis Of Grid-Connected Pv System, M. S. Hassan
M. S. Hassan
دینامیک سیستم های قدرت - بخش سوم, 2016 Department of Electrical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
دینامیک سیستم های قدرت - بخش سوم, Hadi Zayandehroodi
Dr. Hadi Zayandehroodi
No abstract provided.
دینامیک سیستم های قدرت- بخش چهارم, 2016 Department of Electrical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
دینامیک سیستم های قدرت- بخش چهارم, Hadi Zayandehroodi
Dr. Hadi Zayandehroodi
No abstract provided.
A Nash Approach To Planning Merchant Transmission For Renewable Resource Integration, 2016 Alstom Grid Inc.
A Nash Approach To Planning Merchant Transmission For Renewable Resource Integration, Qun Zhou, Leigh Tesfatsion, Chen-Ching Liu, Ron F. Chu, Wei Sun
Major transmission projects are needed to integrate and to deliver renewable energy (RE) resources. Cost recovery is a serious impediment to transmission investment. A negotiation methodology is developed in this study to guide transmission investment for RE integration. Built on Nash bargaining theory, the methodology models a negotiation between an RE generation company and a transmission company for the cost sharing and recovery of a new transmission line permitting delivery of RE to the grid. Findings from a six-bus test case demonstrate the Pareto efficiency of the approach as well as its fairness, in that it is consistent with one ...
Agent-Based Modeling And Institutional Design, 2016 Iowa State University
Agent-Based Modeling And Institutional Design, Leigh Tesfatsion
The recent economic crisis has led to calls for a comprehensive restructuring of energy, financial, health care, and educational systems. Critics worry that the restructuring of these complex institutional arrangements could produce adverse unintended consequences. Given these concerns, pre-testing of proposed changes is eminently desirable but also exceedingly difficult. This essay focuses on the potential use of agent-based modeling for studying proposed changes in institutional arrangements in advance of actual implementation. Ongoing agent-based research on the restructuring of electric power markets is used for concrete illustration.
Systematic Testing And Comparison Of Deterministic And Stochastic Unit Commitment On An 8-Zone Test Case Based On Iso New England Data, Wanning Li, Dheepak Krishnamurthy, Leigh Tesfatsion
The increasing penetration of variable and intermittent generation, especially the wind power, are introducing greater uncertainties to the modern power systems. The operation of power system is thus facing more challenges. Many effective models and algorithms are proposed to mitigate the challenges. Among those, the Stochastic Security-Constrained Unit Commitment (S-SCUC) is one of the most important tools. The S-SCUC has many different features over the traditional deterministic Security-Constrained Unit Commitment (D-SCUC). The propose of this paper is to develop a systematic testing framework to compare the performances of S-SCUC and D-SCUC. To make the results better reflecting the true power ...
Two-Settlement Electric Power Markets With Dynamic-Price Customers, 2016 Iowa State University
Two-Settlement Electric Power Markets With Dynamic-Price Customers, Huan Zhao, Auswin George Thomas, Pedram Jahangiri, Chengrui Cai, Leigh Tesfatsion, Dionysios C. Aliprantis
This study will report both analytical and computational testbed findings regarding the effects of retail dynamic-price contracting on power system operations. The key issue under study is the extent to which the introduction of dynamic price contracts for retail consumers affects the efficiency of both retail and wholesale power market operations through changes in price volatility and load profiles at wholesale, and through re-allocations of risk between load-serving entities and retail consumers.
An 8-Zone Test System Based On Iso New England Data: Development And Application, 2016 Iowa State University
An 8-Zone Test System Based On Iso New England Data: Development And Application, Dheepak Krishnamurthy, Wanning Li, Leigh Tesfatsion
This study develops an open-source 8-zone test system for teaching, training, and research purposes that is based on ISO New England structural attributes and data. The test system models an ISO-managed wholesale power market populated by a mix of generating companies and load-serving entities that operates through time over an 8-zone AC transmission grid. The modular extensible architecture of the test system permits a wide range of sensitivity studies to be conducted. To illustrate the capabilities of the test system, we report energy cost-savings outcomes for a comparative study of stochastic versus deterministic DAM security constrained unit commitment (SCUC) formulations ...
Autonomous Satellite Recovery Vehicle (Asrv) Final Report, 2016 Embry-Riddle Aeronautical University - Daytona Beach
Autonomous Satellite Recovery Vehicle (Asrv) Final Report, Devonte Grantham, Francisco Pastrana, Collin R. Topolski
In collaboration with Embry-Riddle Future Space Explorers and Developers Society (ERFSEDS), we came up with the idea to build a quad-copter/sensor system that could be deployed from a rocket. The goal is to build a new chassis for the quad-copters electronic components that will allow the quad-copters arms to fold inwards to meet the required space constraints of a rocket. In addition to the critical components of the quad-copter, our design will integrate a number of other data collecting sub-systems currently being used in a weather balloon designed by Society 4 S.P.A.C.E. club members. After ...
Active Management Assistant System For Embry-Riddle Ecocar 3 Hybrid Supervisory Control System, 2016 Embry-Riddle Aeronautical University
Active Management Assistant System For Embry-Riddle Ecocar 3 Hybrid Supervisory Control System, Matthew Nelson, Blair Cutting, Michael J. Aleardi
The Embry-Riddle EcoCAR 3 team is developing a prototype hybrid Chevrolet Camaro utilizing a customized vehicle powertrain controller. This controller is serving to ensure system safety, vehicle operation, and consumer drivability while also incorporating advanced driving aids to achieve both the desired performance levels one expects from a Camaro as well as vehicle efficiency. This vehicle must reach the team set vehicle technical specifications of a 4.9 second 0 to 60 time while maintaining a 53 miles per gallon gasoline equivalence rating.
In order to reach the efficiency goal, the team is developing an Active Management Assistance System utilizing ...
Integrated Retail And Wholesale Power System Operation With Smart-Grid Functionality, 2016 Iowa State University
Integrated Retail And Wholesale Power System Operation With Smart-Grid Functionality, Dionysios C. Aliprantis, Scott Penick, Leigh Tesfatsion
Our research team is developing an agent-based test bed for the integrated study of retail and wholesale power markets operating over transmission and distribution networks with smart-grid functionality. This test bed seams together two existing test beds, the AMES Wholesale Power Market Test Bed and the GridLAB-D distribution platform. As a first step, we have designed an integrated retail/wholesale market module specifically based on the ERCOT (Texas) energy region, and we are using simplified versions of this module to study potential retail consumer response to real-time-pricing contracts supported by advanced metering. This study reports on the latter work.
Intelligent Residential Air-Conditioning System With Smart-Grid Functionality, 2016 Iowa State University
Intelligent Residential Air-Conditioning System With Smart-Grid Functionality, Auswin George Thomas, Pedram Jahangiri, Di Wu, Chengrui Cai, Huan Zhao, Dioysios C. Aliprantis, Leigh Tesfatsion
This paper sets forth a novel intelligent residential air-conditioning (A/C) system controller that has smart grid functionality. The qualifier “intelligent” means the A/C system has advanced computational capabilities and uses an array of environmental and occupancy parameters in order to provide optimal intertemporal comfort/cost trade-offs for the resident, conditional on anticipated retail energy prices. The term “smart-grid functionality” means that retail energy prices can depend on wholesale energy prices. Simulation studies are used to demonstrate the capabilities of the proposed A/C system controller.