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: Catalysis & Symplectic geometry. 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.

Open Governance and E-Rulemaking: Online Deliberation and Policy-Making in Contemporary Greek Politics

Abstract: The Internet and its innovative communicative codes stand at the center of a discussion regarding a new, more participatory, direct, and “strong” democracy. The widespread use of the Internet and its applications has profound implications on several facets of political life, such as the procedure of rulemaking. In modern, “large-scale” democracies, the complexity and plurality of political interests seem to be under-represented in official parliamentary procedures. The model of open governance enables citizens to contribute toward how decisions are taken and accordingly democratize rulemaking. At the same time, it increases citizens' ability to exercise control over the elected political representatives. One recent implementation of the idea of an open (e-)government in Greece is the Web site http://www.opengov.gr that was launched by the newly elected government of the Socialist party (PASOK) in October 2009. In this Web site, draft laws per ministry are uploaded, and citizens can upload their c...

A comparative study of the H2-assisted selective catalytic reduction of nitric oxide by propene over noble metal (Pt, Pd, Ir)/γ-Al2O3 catalysts

Abstract: The impact of H 2 as additional reducing agent on the SCR of NO with C 3 H 6 in excess oxygen, was comparatively explored over low noble metal loading (0.5 wt%), Pt/γ-Al 2 O 3 , Pd/γ-Al 2 O 3 , Ir/γ-Al 2 O 3 catalysts. To gain insight into the role of H 2 , the reactions NO + C 3 H 6 + O 2 (R#1), NO + C 3 H 6 + O 2 + H 2 (R#2), NO + H 2 + O 2 (R#3) were employed. In respect to propene oxidation, the Pd > Pt > Ir sequence was obtained under R#1, since they exhibit complete conversion at 220, 250, 325 °C, respectively; all metals exhibit moderate deNO x performances ( X NO, 2 co-presence (R#2) promotes both the NO and C 3 H 6 conversions, which is valid in the whole temperature interval investigated (50–400 °C), being more substantial for Pt/γ-Al 2 O 3 and Ir/γ-Al 2 O 3 , less beneficial for Pd/γ-Al 2 O 3 . A two-maxima feature is obtained on X NO pattern (at ∼100 and ∼230 °C) of Pt and Pd during R#2. The low temperature maximum −attributed to NO reduction by H 2 - is substantially more pronounced on Pt than Pd, offering X NO ∼90% and S N2 ∼85%; the high temperature maximum—attributed to NO reduction by C 3 H 6 —is higher by ∼15% on both Pt and Pd, in respect to the values obtained during R#1, while S N2 remained unaffected. Different X NO pattern with one maximum is obtained over Ir, implying a synergistic interaction between H 2 and C 3 H 6 . This synergy is accompanied by a substantial widening of the NO reduction window toward lower temperatures and a considerable increase on both X NO,max and S N2 (from X NO ∼30% with S N2 ∼55% during R#1 to X NO ∼70% with S N2 ∼95% during R#2). The specific features of all reactions and metals employed are comparatively discussed.

Elevated stacks’ pollutants’ dispersion and its contributions to photochemical smog formation in a heavily industrialized area

Abstract: In this study, the photochemical smog formation over a heavily industrialized area with complex terrain was investigated. A mesoscale prognostic meteorological and air pollution model was used in combination with data, which were collected by in situ and remote monitoring stations. The area of interest is a mountainous basin in north-western Greece. The intensive industrial activity in this area has resulted in effects on the air quality of the area, mainly caused by the lignite-fired power stations and the lignite mining operation. The study focused on the dispersion of ozone production due to primary pollutants’ emissions from the power stations (PSs). Moreover, the investigation of this external sources’ contribution to the ozone concentrations measured in Kozani, the most populated city of the area, is ventured. The results showed a considerable skill of the model in predicting the major mesoscale features affecting the pollutants’ dispersion and concentrations in the area of interest. Numerical simulation data of photochemical pollutants were significantly correlated with meteorology during the simulation period. The correlation reveals the most important factors of ozone production, such as solar radiation, temperature, wind speed and topography. The obtained results have contributed to the verification of distant pollutants’ transfer from industrial sources.

The Effect of Ni Addition onto a Cu-Based Ternary Support on the H₂ Production over Glycerol Steam Reforming Reaction.

Abstract: In the present study, Ni/Ce-Sm-xCu (x = 5, 7, 10 at.%) catalysts were prepared using microwave radiation coupled with sol-gel and followed by wetness impregnation method for the Ni incorporation. Highly dispersed nanocrystallites of CuO and NiO on the Ce-Sm-Cu support were found. Increase of Cu content seems to facilitate the reducibility of the catalyst according to the H₂ temperature-programmed reduction (H₂-TPR). All the catalysts had a variety of weak, medium and strong acid/basic sites that regulate the reaction products. All the catalysts had very high XC3H8O3 for the entire temperature (400–750 °C) range; from ≈84% at 400 °C to ≈94% at 750 °C. Ni/Ce-Sm-10Cu catalyst showed the lowest XC3H8O3-gas implying the Cu content has a detrimental effect on performance, especially between 450–650 °C. In terms of H₂ selectivity (SH2) and H₂ yield (YH2), both appeared to vary in the following order: Ni/Ce-Sm-10Cu ˃ Ni/Ce-Sm-7Cu ˃ Ni/Ce-Sm-5Cu, demonstrating the high impact of Cu content. Following stability tests, all the catalysts accumulated high amounts of carbon, following the order Ni/Ce-Sm-5Cu ˂ Ni/Ce-Sm-7Cu ˂ Ni/Ce-Sm-10Cu (52, 65 and 79 wt.%, respectively) based on the thermogravimetric analysis (TGA) studies. Raman studies showed that the incorporation of Cu in the support matrix controls the extent of carbon graphitization deposited during the reaction at hand.

Web Campaign in the 2002 Greek Municipal Elections

Abstract: This study attempts to investigate the Web use by candidates during their campaign in the Greek local municipal elections of 2002. Municipal elections take place simultaneously with prefecture elections to decide local officials in 900 municipalities of the 51 prefectures. The municipal and prefecture electoral contests of 2002 were the first attempts of candidates to include the Web into their campaign strategies. The focus of the study is on how many candidates were going online, how much interactivity was used, what kind of information was distributed, and what kinds of multimedia tools were present. The study indicates that the overwhelming majority of municipal candidates has not used the Web as a basic information provision medium and has not explored the interactivity features for increasing levels of awareness by the voters. Comparing candidates with a Web campaign strategy to those without, we identified that candidates with a Web strategy won the contest in most of the cases. This study...