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Liordos V.,Eastern Macedonia and Thrace Institute of Technology | Kontsiotis V.J.,Eastern Macedonia and Thrace Institute of Technology | Anastasiadou M.,Eastern Macedonia and Thrace Institute of Technology | Karavasias E.,Eastern Macedonia and Thrace Institute of Technology
Science of the Total Environment | Year: 2017

It is critical for managers to understand how attitudes and demography affect public's preferences for species protection for designing successful conservation projects. 1080 adults in Greece were asked to rate pictures of 12 endangered species on aesthetic and negativistic attitudes, and intention to support their conservation. Factor analysis identified a group of animals for which respondents indicated high levels of support for their conservation (red deer, loggerhead sea turtle, brown bear, common pheasant, European ground squirrel, glossy ibis) and a group of animals for which respondents indicated low levels of support (black vulture, great white shark, fire-bellied toad, western barbastelle, Cretan tube web spider, Milos viper). The species that received the highest support were also rated as the most attractive and safest, excluding the fearsome brown bear. Structural models revealed that aesthetic, moralistic and negativistic attitudes were the stronger predictors of support. Aesthetic and moralistic attitudes were positively, and negativistic attitudes negatively, correlated with support for conservation in both groups. Consumptive users scored lower in aesthetics and were less supportive of protection in the high support group, while nonconsumptive users showed the opposite trend. Respondents residing in urban areas deemed animals of high support more attractive and less fearsome and were more supportive of conservation than rural residents in both groups. Females of higher education viewed animals of low support as fearsome, however they supported their conservation. Our study identified popular species that can be used as flagship species to facilitate the implementation of conservation projects. The results of this study could also be used to design a communication and outreach campaign to raise awareness about the ecosystem value of less attractive species. © 2017 Elsevier B.V.


Fantidis J.G.,Eastern Macedonia and Thrace Institute of Technology
International Journal of Radiation Research | Year: 2015

Background: Monte Carlo simulations play a vital role in the calculation of the necessary shielding both for neutrons and photons. Advanced and simple shielding materials against neutron and gamma rays were compared by simulation using the MCNB4B Monte Carlo code. The simulations were carried out for the three common neutron sources, namely the 252Cf, the 241Am/Be and the DD neutron generator which are suitable for transportable facilities. Materials and Methods: The source has been simulated as sphere with 3 cm diameter while the necessary shielding is designed in the form of a sphere around the neutron source. The materials considered were chosen according to the EU Directive 2002/95/EC, hence excluding lead and cadmium. Results: In the case of DD neutron generator the thickness, the weight and the volume of the shield can decrease up to 41.3, 44, and 78.4% correspondingly. With regard to the 252Cf neutron source the use of advanced shielding materials can reduce the corresponding parameters up to 32.7, 40.7, and 68.4% respectively. As regards the 241Am/Be neutron source, based on advanced shielding materials the thickness, the mass and the volume of the shield can decrease by 33.8, 49.5, and 70% respectively. Conclusion: The obtained results showed that the use of advanced shielding materials has led to reduce greatly the weight and the volume of the necessary shield.


Favvas E.P.,Greek National Center For Scientific Research | Favvas E.P.,Eastern Macedonia and Thrace Institute of Technology
Separation and Purification Technology | Year: 2014

Two asymmetric carbon hollow fiber membranes were prepared and tested for CO2 permeance from low, atmospheric, to high pressures up to ∼55 bar. Both membranes were produced via pyrolysis of polyimide hollow fiber membranes at 1050 °C, the one in inert environment, while the other was activated with CO2 at the higher pyrolysis temperature. The carbon dioxide was chosen for the permeance performance of the studied membranes. A maximum in the curve of permeance versus equilibrium pressure is observed at 32 bar for both studied carbon hollow fiber membranes. This phenomenon has close analogy to the case of mesoporous membranes. The result shows that the CO 2 provides a maximum in the permeance values. This weakens considerably as the membrane ultra-microporosity is increased. The high pressure gas permeance study may be potentially useful for the identification of the optimal pressure and temperature conditions for efficient gas separations. © 2014 Elsevier B.V. All rights reserved.


Kokkinos N.C.,Eastern Macedonia and Thrace Institute of Technology | Mitropoulos A.C.,Eastern Macedonia and Thrace Institute of Technology | Nikolaou N.A.,Eastern Macedonia and Thrace Institute of Technology
Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference, ADIPEC 2015 | Year: 2015

In the present research work an in situ conversion process of light-light cracked naphtha (LLCN) to strong anti-knocking mixtures is proposed as a potential solution to the serious drawbacks from the use of gasoline ether oxygenates (MTBE, ETBE, TAME) from the refineries. Aqueous biphasic Rh/TPPTS-catalysed hydroformylation reaction of olefins present in a Greek refinery naphtha cut comprises the first part of the two-step proposed process. The second part of the proposed LLCN upgrade process is the in situ hydrogenation of the produced aldehydes to the corresponding alcohols catalysed by Ru/TPPTS complex in aqueous media. Both catalytic systems of Rh/TPPTS and Ru/TPPTS were revealed as effective catalytic systems for biphasic hydroformylation and biphasic hydrogenation of complicated mixtures, respectively. The effect of the pressure, temperature and time of the reactions, as well as the influence of the L/Me molar ratio were investigated. In the first step (hydroformylation reaction) as well as in the second step (hydrogenation reaction) the highest conversion of more than 95% of the olefins and aldehydes respectively was observed at mild conditions, at a short reaction time. The upgraded LLCN could potentially replace the harmful gasoline ether oxygenates from the refinery blended gasoline pools with an in situ and an environmentally friendly catalytic process. Therefore, the ultimate fuel will contain more oxygen, due to the producing favourable strong anti-knocking alcohol mixtures; it will have better combustion properties and bigger octane numbers. Copyright 2015, Society of Petroleum Engineers.


Liordos V.,Hellenic Forest Service | Liordos V.,Eastern Macedonia and Thrace Institute of Technology
Zoology and Ecology | Year: 2014

Knowledge of hunters' behaviour is critical for the proper management of hunting. The preferences and sociodemographic characteristics of a Greek hunting community, the Megara Hunting Club, were therefore investigated through a questionnaire survey. Club members were mostly less than 50 years old with a family, mainly self-employed, farmers or private employees of secondary education and mostly having medium or higher income. All income classes preferred local over national licences, although the lower class did so in higher proportions. Megara hunters pursued the local small game, for which they also searched elsewhere. They were strongly attached to hunting as a sport, except for the poorest who hunted for subsistence. Furthermore, local hunters spent annually on average 58.3 days and € 1764.6, with the middle-aged, highly educated or wealthier hunters being the most dedicated to hunting in terms of both time and money. Considering the ongoing Greek debt crisis, an increase in the demand of local game and a shift towards subsistence hunting is predicted. Research offered important new insights for the practice of hunting and could be used as an aid for the design and application of informed policy and management plans in Greece and also in other comparable countries. © 2014 Nature Research Centre.


Liordos V.,Hellenic Forest Service | Liordos V.,Eastern Macedonia and Thrace Institute of Technology
European Journal of Wildlife Research | Year: 2014

The membership trends and attitudes of a Greek hunting community, the Megara Hunting Club, were determined through the analysis of 408 questionnaires. The number of hunting licences increased from 2003 to 2008, decreasing thereafter, mostly because a proportion of hunters holding a national licence quit hunting. This was in agreement with the onset of the national debt crisis and the concurrent decrease of the gross domestic product. Factor analysis revealed that hunters rather agreed that a ‘systemic’ (mean score 3.48) and rather disagreed that a ‘legal’ (2.59) factor negatively affected the practice of hunting, while they agreed that a ‘game status’ factor (4.06) was important. In particular, they contended that improved hunting administration and stakeholder collaboration are needed (systemic dimension), and game populations have declined due to anthropogenic activities such as illegal hunting, pollution, habitat loss and climate change (game status dimension). Findings suggest that, in the light of the ongoing economic crisis, immediate action should be taken toward the retention of hunters and protection and enhancement of game, through the application of appropriate policy and management measures. © 2014, Springer-Verlag Berlin Heidelberg.


Tsourgiannis L.,Region of Eastern Macedonia and Thrace | Kazana V.,Eastern Macedonia and Thrace Institute of Technology | Iakovoglou V.,Eastern Macedonia and Thrace Institute of Technology
CEUR Workshop Proceedings | Year: 2015

This paper aims to examine the attitudes of the consumers in Greece towards the use of biotechnology in forest plantations and their potential purchases of forest transgenic products. Three groups of factors related the consumers' attitude on the use of biotechnology in forest plantations with the potential purchases of transgenic forest products: (a) the potential negative environmental impacts (b) the potential positive impacts on production processes, and (c) economic impacts. Furthermore, this study indicated that consumers who intent to buy paper products derived from Genetically Modified (GM) forest trees, were concerned for the environmental impacts of the GM trees and then on the production process that was followed by economic issues. No significant relationships were found between the consumers who declared that they intent to buy wood and woody biomass energy products derived from GM trees and the importance of the factors that affect their attitudes towards the adoption of biotechnology in forest plantations. Copyright © 2015 for the individual papers by the papers' authors.


Favvas E.P.,Greek National Center For Scientific Research | Favvas E.P.,Eastern Macedonia and Thrace Institute of Technology | Stefanopoulos K.L.,Greek National Center For Scientific Research | Nolan J.W.,Eastern Macedonia and Thrace Institute of Technology | And 3 more authors.
Separation and Purification Technology | Year: 2014

In this study, both the structural and gas permeation properties of mixed matrix asymmetric hollow fiber membranes were investigated. The average outer and inner diameters of the membranes are 1200 and 800 μm respectively, and as used polymer was chosen the BTDA-TDI/MDI (P84) co-polyimide. Phenol-functionalized multi-wall carbon nanotubes were chosen as filler materials and their morphological characteristics were investigated by TEM. The membranes were then characterized by FTIR and SANS; Tg variations were evaluated by DSC measurements. The findings provide evidence for uniform dispersion of nanotubes and the existence of small structures formed by the filler addition. Finally, permeance experiments in a series of pure gases (He, H2, CH4, N2, O2, C2H6, CO2 and C3H8) at 25, 60 and 100 °C were carried out. The results revealed that the good multi-wall carbon nanotubes dispersion leads to enhanced gas permeation properties. © 2014 Elsevier B.V. All rights reserved.


PubMed | Eastern Macedonia and Thrace Institute of Technology and Aristotle University of Thessaloniki
Type: | Journal: The Science of the total environment | Year: 2016

Wildlife management seeks to minimise public controversy for successful application of wildlife control methods. Human dimensions research in wildlife seeks a better understanding of public preferences for effective human-wildlife conflict resolution. In face to face interviews, 630 adults in Greece were asked to rate on a 5-point Likert-like scale their acceptance of 3 management methods, i.e., do nothing, non-lethal control, and lethal control, in the context of 5 human-wildlife conflict scenarios: 1) corvids damage crops; 2) starlings damage crops; 3) starlings foul urban structures; 4) coypus damage crops; and 5) coypus transfer disease. Univariate GLMs determined occupation, hunting membership and their interaction as the stronger predictors of public acceptance, generating 4 stakeholder groups: the general public, farmers, hunters, and farmers-hunters. Differences in acceptance and consensus among stakeholder groups were assessed using the Potential for Conflict Index


PubMed | Eastern Macedonia and Thrace Institute of Technology and Institute of Nanoscience and Nanotechnology
Type: Journal Article | Journal: PloS one | Year: 2016

Everetts theorem-6 of the domain theory was examined by conducting adsorption in situ with small angle x-ray scattering (SAXS) supplemented by the contrast matching technique. The study focuses on the spectrum differences of a point to which the system arrives from different scanning paths. It is noted that according to this theorem at a common point the system has similar macroscopic properties. Furthermore it was examined the memory string of the system. We concluded that opposite to theorem-6: a) at a common point the system can reach in a finite (not an infinite) number of ways, b) a correction for the thickness of the adsorbed film prior to capillary condensation is necessary, and c) the scattering curves although at high-Q values coincide, at low-Q values are different indicating different microscopic states. That is, at a common point the system holds different metastable states sustained by hysteresis effects. These metastable states are the ones which highlight the way of a system back to a return point memory (RPM). Entering the hysteresis loop from different RPMs different histories are implanted to the paths toward the common point. Although in general the memory points refer to relaxation phenomena, they also constitute a characteristic feature of capillary condensation. Analogies of the no-passing rule and the adiabaticity assumption in the frame of adsorption hysteresis are discussed.

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