With the ever-increasing complexities in power systems across the worldwide, especially opening of electric power markets, it becomes more and more important to provide stable, secure, controlled and high quality electric power on today’s environment. The deregulation and competitive environment in the contemporary power networks will imply a new scenario in terms of load and power flow conditi...

Synthetic aperture radar (SAR) tomography (TomoSAR) estimates scene reflectivity along elevation coordinates, based on multi-baseline measurements. Common TomoSAR approaches are based on every single range-azimuth cell or the cell’s neighborhood. By using an additional synthetic aperture for elevation, these techniques have higher resolution power for elevation, to discriminate scatterers with ...

Geopolitical competition between Russia and the US and EU on the periphery of the former USSR has complicated efforts to resolve lingering conflicts in Abkhazia, South Ossetia, Nagorno-Karabakh, and Transnistria. Regional and great power rivalries often obscure the distinctive local factors in each of these conflicts, which are ultimately crucial to their resolution. In addition, changes in loc...

A high-resolution stochastic time-to-digital converter (STDC) using an edge-interchange scheme is described. The proposed STDC provides a higher resolution but consumes less power than previous STDCs that gave the same resolution. The limitation on input phase difference caused by the arbiter and the edge-interchange circuit is analyzed. Simulated results show that for the task proposed herein,...

This paper proposes a design of voltage sensor with new controllable delay element (CDE) having high linearity and high resolution. The proposed CDE uses power supply node to measure the voltage value. However, the delay increases exponentially at low voltage level. In this paper we add a PMOS header in parallel with the conventional CDE to compensate the delay degradation at lower voltage. We ...

An inverter-battery system manufactured by Sustainable Automation Inc. (Sec. 3) underwent testing at the Alaska Center for Energy and Power's Power Systems Integration Laboratory (Sec. 2). The aim of the tests was to demonstrate that inverter-battery systems are a viable strategy for diesel-off mode operation of wind-diesel grids, and to investigate whether this particular inverter-battery syst...

The large problem to create manual welds of constant high quality results from missing optical information during the actual welding process. Due to the extreme brightness conditions e.g. in arc welding and the use of protective glasses even experienced welders can hardly recognize details of the welding pool, the welding seam and the environment. This paper describes a new research project for...

Extracting avalanche distributions from experimental microplasticity data can be hampered by limited time resolution. We compute the effects of low time resolution on avalanche size distributions and give quantitative criteria for diagnosing and circumventing problems associated with low time resolution. We show that traditional analysis of data obtained at low acquisition rates can lead to ava...

In this paper, we extend our previous image resolution enhancement results in [1] by proposing a technique for the estimation of the regularization parameter based on the assumption it should satisfy the following properties: It should be a function of the regularized noise power of the data and its choice should yield a convex functional whose minimization would give the desired high-resolutio...