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.

Analysis of high penetration of electric vehicles and photovoltaics on a greek low-voltage network

Abstract: This paper examines the scenario of high penetration of Photovoltaics (PV) and Electric Vehicles (EV) in Low-Voltage (LV) Distribution Networks (DN), using as a case study a typical DN found in Greece. The European Union (EU) has set targets and Directives that make it very likely to find in the near future DNs with a large number of PVs inducing overvoltages and uncontrolled EV charging resulting in under-voltages. Since PV production and EV charging generally happen at different times, especially in residential case studies, a DN may experience both unwanted circumstances at the same day. One way to deal with these issues is to smartly utilize distributed or centralized storage, which may additionally delay necessary investments on the DNs. This paper utilizes a case study of a typical DN found in Greece, suitably adapted to illustrate the above concepts. First, an analysis of the stress imposed to the DN by both PVs and EVs is evaluated, using as input real measurements at the beginning of the LV feeder. Then, the paper suggests a simple utilization of storage in order to keep the voltages at all nodes of the DN inside the desired limits. Finally, a short analysis regarding the power losses is presented.

Low-temperature tunneling of CH3 quantum rotor in van der Waals solids

Abstract: Motional quantum effects of tunneling methyl radical isolated in solid gases as they appear on experimental electron paramagnetic resonance (EPR) spectra are examined. Obtained analytical expressions of the tunneling frequency for methyl rotor/torsional-oscillator utilizing localized Hermite polynomials are compared to full numerical computations and tested against experimental EPR lineshape simulations. In particular, the X-band of methyl radical was displaying partial anisotropy averaging even at lowest temperatures. EPR lineshape simulations involving rotational dynamics were applied for the accurate determination of the potential barrier and the tunneling frequency. Tunneling frequency, as the splitting between the A and E torsional levels by the presence of a periodic C3 model potential with periodic boundary conditions, was computed and related to the EPR-lineshape alteration. The corresponding C2 rotary tunneling about the in-plane axes of methyl was also studied while both the C2 and C3 rotations were compared with the rotation of deuteriated methyl radical.

Hand finger gesture modeling in advanced CAD system

Abstract: The current paper presents a system for the dynamic simulation of the human hand. The simulation of the human hand offers the capability to acquire handshapes that correspond to letters of the finger alphabet, enabling an integrated representation of words and sentences. The hand model is designed using the Autodesk InventorTM and Autodesk AutoCadTM design environments. The user is able to type words or sentences which are dynamically translated into postures according to the finger alphabet. The system is based on the physiometric characteristics of an average human hand. High precision design is utilized in every part through integration of all the necessary functionalities needed to perform the movements required. The system has been tested on more than 500 words with a letter representation success rate in the range of 95–97%.

Short- and Long-Run Determinants of Tourist Flows: The Case of South Korea

Abstract: This paper examines the effect of Exchange Rate Volatility for South Korea, on tourist arrivals exports during the period of first quarter of 1990 to fourth quarter of 2015. It is claimed by some researchers that high fluctuations of exchange rates cause a reduction on tourist arrivals. Empirical researchers often utilize the standard deviation of the moving average of the logarithm of the exchange rate as a measure of exchange rate fluctuation. In this study, a new measure for measuring volatility is proposed. The empirical methodology used relies upon the theory of cointegration, error correction representation of the exchange rate volatility measures using the Autoregressive Distributed Lags modeling to cointegration. Overall, our findings suggest that there is a negative effect of volatility to tourist arrivals for Korea.

Efficient service provisioning through dynamic service task assignment in a multi-domain distributed computing environment

Abstract: Highly competitive and open environments should encompass mechanisms that will assist Service Providers (SPs) in accounting for their interests, ie, offering at a given period of time the adequate quality services in a cost-efficient manner Assuming that a user wishes to access a specific service composed of a distinct set of service tasks, which can be served by various Candidate Service Nodes (CSNs), a problem that should be addressed is the assignment of service tasks to the most appropriate service nodes The pertinent problem is concisely defined, optimally formulated and evaluated through simulation experiments on a real network test bed