Power Systems Stability through Piecewise Monotonic Data Approximations – Part 1: Comparative Benchmarking of L1PMA, L2WPMA and L2CXCV in Overhead Medium-Voltage Broadband over Power Lines Networks

This first paper assesses the performance of three well-known piecewise monotonic data approximations (i.e., L1PMA, L2WPMA, and L2CXCV) during the mitigation of measurement differences in the overhead medium-voltage broadband over power lines (OV MV BPL) transfer functions.The contribution of this paper is triple. First, based on the inherent piecewise monotonicity of OV MV BPL transfer functions, L2WPMA and L2CXCV are outlined and applied during the determination of theoretical and measured OV MVBPL transfer functions. Second, L1PMA, L2WPMA, and L2CXCV are comparatively benchmarked by using the performance metrics of the percent error sum (PES) and fault PES. PES and fault PES assess the efficiency and accuracy of the three piecewise monotonic data approximations during the determination of transmission BPL transfer functions. Third, the performance of L1PMA, L2WPMA, and L2CXCV is assessed with respect to the nature of faults —i.e. faults that follow either continuous uniform distribution (CUD) or normal distribution (ND) of different magnitudes—.The goal of this set of two papers is the establishment of a more effective identification and restoration of the measurement differences during the OV MV BPL coupling transfer function determination that may significantly help towards a more stable and self-healing power system.Citation: Lazaropoulos, A. G. (2017). Power Systems Stability through Piecewise Monotonic Data Approximations – Part 1: Comparative Benchmarking of L1PMA, L2WPMA and L2CXCV in Overhead Medium-Voltage Broadband over Power Lines Networks. Trends in Renewable Energy, 3(1), 2-32. DOI: 10.17737/tre.2017.3.1.002

Potential effect on the goals of the Federal Communications Commission's "National Broadband Plan."

Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2011.Cataloged from PDF version of thesis.Includes bibliographical references (p. 99-101).The Federal Communications Commission (FCC) has stated that broadband is the great infrastructure challenge of the early 21st century. On March 16, 2010 the FCC published "Connecting America: The National Broadband Plan". One of the goals of the FCC Plan is having 1OOM U.S. households with affordable access to actual download speeds of at least 100Mbps and actual upload speeds of at least 50Mbps. The FCC also has the goal that every American should have affordable access to robust broadband (5Mbps) service. This paper examines the potential use of Dynamic Time Metered Delivery (DTMD) in the furtherance of these goals using data and analysis from public sources and TelePulse Technologies Corporation (inventors of DTMD). The key questions the research proposes to answer are: * Using Hypercube analysis, how would key elements of the value chain for phone companies categorize and react to DTMD as an innovation? * Are there specific goals of the FCC National Broadband Plan that might be directly furthered by the use of DTMD? By decreasing the price of broadband performance, DTMD can further FCC goals for broadband adoption in rural communities, less dense suburban communities and low income urban communities. With DTMD and without capital expenditure, the current broadband un-served can be enabled with a broadband speed of minimum 5Mbps on their current phone lines. The cost for a phone company to provide the service goes from being a capital expenditure to a consumable expenditure. In the case of broadband deployment, for rural communities, less dense urban communities and low income urban communities, private sector business goals and public sector goals conflict. Various parts of a broadband provider's value chain may see needed innovation as potentially disruptive, lacking a robust total market, or lacking a high degree of interest by the service provider (the perceived driver of market volume). While private sector investment in broadband has increased, that funding is focused on more at improving current investment with incremental improvement to market proven technologies. FCC driven investment opportunities and incentives to innovate for the unserved should include opportunities to innovate with technologies that are not fully market proven.by Brian Wenford Jesse Posey.S.M.in Engineering and Managemen

Improvement of Power Systems Stability by Applying Topology Identification Methodology (TIM) and Fault and Instability Identification Methodology (FIIM) – Study of the Overhead Medium-Voltage Broadband over Power Lines (OV MV BPL) Networks Case

The performance of two useful piecewise monotonic data approximation (PMA) applications that are Topology Identification Methodology (TIM) and Fault and Instability Identification Methodology (FIIM) is investigated in this paper for the overhead medium-voltage broadband over power lines (OV MV BPL) networks. TIM and FIIM are applied to OV MV BPL networks when measurement differences, faults and instabilities occur. By exploiting the L1PMA optimal number of monotonic sections, advanced TIM and FIIM are also proposed and applied to OV MV BPL networks. The results of the four PMA applications are compared and it is found that advanced TIM and FIIM achieve higher computational speeds and almost equivalent identification performance in comparison with the respective original TIM and FIIM. Exploiting the better performance metrics of advanced TIM and FIIM, PMA applications provide a stable step towards the real time surveillance and monitoring of transmission and distribution power grid.Citation: Lazaropoulos, A. G. (2017). Improvement of Power Systems Stability by Applying Topology Identification Methodology (TIM) and Fault and Instability Identification Methodology (FIIM) – Study of the Overhead Medium-Voltage Broadband over Power Lines (OV MV BPL) Networks Case. Trends in Renewable Energy, 3, 102-128. DOI: 10.17737/tre.2017.3.2.003

Rethinking universal service for a next generation network environment

There is a clear need, in view of significant competitive, technological and service changes taking place in the telecommunications sector, to review universal service obligations, their coverage, how they are financed and who is responsible for providing them. In many OECD countries, a primary longer term issue is how to provide universal service in the new competitive environment where voice is ubiquitous and cheap, voice revenues low and where voice has become just one of many applications provided on networks. Access too is changing, with more choice in platforms available that allow access to voice applications. This paper overviews the main issues that need to be examined in such a review with a view to the reform of universal service in a way consistent with emerging technological realities and competitive circumstances. [Introduction

Emerging research directions in computer science : contributions from the young informatics faculty in Karlsruhe

In order to build better human-friendly human-computer interfaces, such interfaces need to be enabled with capabilities to perceive the user, his location, identity, activities and in particular his interaction with others and the machine. Only with these perception capabilities can smart systems ( for example human-friendly robots or smart environments) become posssible. In my research I\u27m thus focusing on the development of novel techniques for the visual perception of humans and their activities, in order to facilitate perceptive multimodal interfaces, humanoid robots and smart environments. My work includes research on person tracking, person identication, recognition of pointing gestures, estimation of head orientation and focus of attention, as well as audio-visual scene and activity analysis. Application areas are humanfriendly humanoid robots, smart environments, content-based image and video analysis, as well as safety- and security-related applications. This article gives a brief overview of my ongoing research activities in these areas