Technological Educational Institute of Western Macedonia

About: Technological Educational Institute of Western Macedonia is a based out in . It is known for research contribution in the topics: Symplectic geometry & Numerical integration. The organization has 291 authors who have published 522 publications receiving 7682 citations. The organization is also known as: TEI of West Macedonia & TEI of Western Macedonia.

Binary voxel map compression based on quadtree and octree subdivision, using arbitrary and non-power-of-2 dimensions

Abstract: This paper presents an approach to store binary voxel maps of arbitrary, non-power-of-2 dimensions, using 2D and 3D spatial subdivision. The two data structures used are quadtrees and octrees. The approach presented is applied on voxel maps of bone tissue that has been microCT scanned at a resolution of a few microns. Due to space requirements all source data may not be expanded to cover sizes that are a power of 2, which would greatly simplify the subdivision approach. The 2D subdivision data structure is applied on a per z-level, while the 3D subdivision is applied on the entire voxel map. Either of the two approaches compresses the initial data, although not at the same level. The 2D approach allows selective decompression of each z-layer, without processing the remaining voxel map.

Digital Audio Broadcasting (DAB) grid agents for ancillary services of the smart grid

Abstract: The main objective of this paper is to present a DAB protocol and a DAB grid agent prototype, as essential parts of a grid ancillary services operational model. The decentralized, small electric loads (electric vehicles, household-appliances, batteries, prosumers), clustered properly by aggregators are equipped in large amounts with the so called “grid-agents”. A grid-agent is a cost-effective, low-power, smart electric control unit consisting of a DAB+ receiver with embedded circuits for local grid voltage and frequency measurements and a microcontroller running algorithms for flexible load control. The grid-agent will optimize the electricity demand with respect to the grid status and/or to external commands received via DAB+. Moreover, especially suited for Transmission System Operators (TSOs), multi-load power facilities that are controlled by energy management systems through specific standards (e.g. KNX for hotels, Modbus for the industrial sector, etc) and even Renewable Energy Sources (RES) Distributed Generators (DGs) are equipped with a single DAB+ grid-agent.

Utilizing Short-Term Load Forecasts in the Assessment of Demand Response Programs

Abstract: The present paper proposes an integrated Demand Response (DR) methodology for eligible consumers in day-ahead markets. The test case refers to a high voltage industrial consumer of the Greek energy system. The first stage of the methodology involves a load profiling process to derive the typical load patterns of the consumers. Based on the shapes of the load profiles, a dedicated DR measure is designed for the purpose of manifesting a specific load modification target. The DR measure is supported with a Short-Term Load Forecasting (STLF) routine in day-ahead basis. In the paper, load predictions are treated as a tool that can provide information about the potential of the DR measures. Based on the forecasts, the DR are designed, implemented and evaluated.