Academy of science of Albania

Tirana, Albania

Academy of science of Albania

Tirana, Albania
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Jouanne F.,University of Savoy | Mugnier J.L.,University of Savoy | Koci R.,University of Tirana | Bushati S.,Academy of science of Albania | And 6 more authors.
Tectonophysics | Year: 2012

Current tectonics of Albania is documented by neotectonics evidences and by a large number of medium size earthquakes. Focal mechanisms suggest a current shortening across the external Albanides whereas internal Albanides are affected by extension with direction varying from E-W to N-S extension. To investigate the kinematics of Albanides, we integrate continuous and episodic GPS velocity measurements with focal mechanisms of the regional centroid moment tensor catalog. This study has allowed distinguishing the followings: 1) western Albania affected by southwestward motions relative to Apulia microplate, the foreland of Albanides, illustrating the ongoing collision of external Albanides; 2) the inner Albanides affected by a southward motion with a southward increase, relative to both Apulia and stable Eurasia. Active thrusts and backthrusts of external Albanides are segmented by strike-slip faults; the fault between the external Albanides and the Ionian zone appears to be particularly active. The fault zone forming the boundary between Dinarides and Albanides, is identified as the northern limit of an area including Albania and western Greece, affected by a clockwise rotation relative to Apulia and also the northern limit of the area (inner Albanides, Macedonia, Bulgaria) affected by southward motion relative to Apulia and stable Eurasia. The ENE-WSW transverse fault zone in Central Albania and western Macedonia (Diber-Elbasani fault) appears to be mainly affected by a moderate extension. CGPS data confirm that the external-inner Albanides transition is the western border of the domain (inner Albania, northern Greece, Macedonia, Bulgaria) affected by southward displacements relative to stable Eurasia and Apulia, whereas the fault zone forming the boundary between Dinarides and Albanides constitutes probably its northern limit. © 2012 Elsevier B.V.

Reci H.,Polytechnic University of Tirana | Tsokas G.N.,Aristotle University of Thessaloniki | Papazachos C.,Aristotle University of Thessaloniki | Bushati S.,Academy of science of Albania
Romanian Reports in Physics | Year: 2011

The complex attributes analysis is an operator used in the extracting parameters of the buried structures with susceptibility and density contrasts distributions, which lead to the gravity and magnetic anomalies in the region of interest. In this paper is presented the complex attributes analysis of gravity field filtered for wavelengths lower than 50 km in the territory of Greece. The area of Greece has a complex tectonic history and fault system dominated by the subduction of the African plate beneath the Euroasia. A low-pass filter is used on the Bouguer Anomaly to cut off wavelengths lower than 50Km in order to delineate the major faults structures of interests at big depths. The complex attributes technique aids in interpretation of potential field anomalies, because it can delineate the edges of concealed targets. In obtaining the source parameters from the complex attributes like the local depth, strike and dip, the assumption of sloping contact for the subsurface model is used. The estimated local parameters are in agreement with results obtained by previous interpretations. They can be used in combination with other method to interpret the anomalous field.

Frasheri N.,Polytechnic University of Tirana | Bushati S.,Academy of science of Albania
Scalable Computing | Year: 2012

In the paper we analyse results from the inversion of geophysical anomalies in high performance computing platforms. We experiment the solution of this ill-posed problem, trying to bypass the complexity of the calculations using simple algorithms that require huge calculation capacities offered by parallel systems. The gravity anomalies are considered because of the simplicity of the gravity modeling in geophysics. © 2012 SCPE.

Paspali G.,Eqrem Çabej University of Gjirokastra | Oruci S.,Eqrem Çabej University of Gjirokastra | Koni M.,University of Tirana | Wilson I.F.,Academy of science of Albania | And 2 more authors.
Turkish Journal of Zoology | Year: 2013

The small mammal composition in the diet of barn owls from the Drinos River valley, southern Albania, was studied over the period of 1 year (September 2010-September 2011). A total of 662 pellets was collected and analyzed, and 1951 prey items were identified. Fourteen different small mammal species were identified (5 insectivores and 9 rodents), among which Microtus thomasi (frequency, F = 32.9%; biomass, B = 45.5%), Crocidura suaveolens (F = 23.5%; B = 9.4%), and Mus macedonicus (F = 17.8%; B = 16.3%) were the most abundant. In winter, Rattus rattus increased significantly in the consumed prey biomass (18.1%), while in spring Apodemus sylvaticus (9.4%) ranked third most common among the prey species. Neomys anomalus was more frequent in the diet in autumn and winter than in spring and summer. Suncus etruscus had low percentages in the barn owl diet, but was preyed upon during all seasons, confirming the presence of the species in the Drinos valley. Significant seasonal variations in small mammals in the diet of the barn owl were detected. Environmental index (i/r) values indicate that the Drinos valley is mainly an agrocenosis of nonintensive land-use practices. © TÜBİTAK.

Reci H.,Polytechnic University of Tirana | Jata I.,Polytechnic University of Tirana | Bushati S.,Academy of science of Albania
Romanian Reports in Physics | Year: 2015

During the period 2010-2011 geoelectric surveys using Electrical Resistance Tomography (ERT) method, have been applied on two archeological sites of Albania, Apollonia and Bylis. The purpose of this study was the detection of the cultural layer and the underground archeological buried features from the spatial distribution of true resistivity values. The geoelectric surveys were carried out throughout very dense 2-D ERT parallel profiles 1.5m from each other, with electrodes spaced apart by 1m. The squares were surveyed using two geometric configurations: Wenner and dipole-dipole arrays. The collected data were interpreted with use of the inversion resistivity method. True resistivity of the subsurface was obtained, with use of nonlinear equations defined with the least-squares inversion method, from the measured apparent resistivity values. 3-D interpretation of profiles was carried out and maps of different depths were compiled. The use of both arrays helps to better understand the spatial extent of archaeological featured from taken resistivity anomalies. The true resistivity models taken from the inversion of apparent resistivity measurements from both arrays, show little changes. The ERT method was found to delineate very well a thickness of cultural layer and buried archaeological objects inside it. The cultural layer on Bylis is depicted with lower resistivity values than the basement which is limestone, while the cultural layer in Apollonia has higher resistivity values than the basement which is clay-sand layer. © 2015, Editura Academiei Romane. All rights reserved.

Reci H.,Institute of Geosciences | Jata I.,Institute of Geosciences | Bushati S.,Academy of science of Albania
Near Surface Geoscience 2012 | Year: 2012

During the period 2010-2011 geoelectric surveys using Electrical Resistance Tomography (ERT) method, has been carried on two archeological sites of Albania, Bylis and Apollonia. In archaeological site of Bylis, are surveyed two squares with dimensions 30×25. In the "Roman Baths" area, in Apollonia, are surveyed 5 squares around it. The geoelectric surveys of squares, was carried out with 2D parallel profiles with distance between them 1.5m and electrode spacing 1m. The geoelectric system used consists on a multielectrode system which contained the central unit, WDJ-3, the automatic link box WDJZ-3, and two multicore cables with 30 takeouts each. Both,Wenner and Dipole-Dipole arrays have been used. The collected data have been interpreted with the inversion resistivity method. Solving the system of nonlinear equations with Least-Square inversion method, from the measured apparent resistivity values, the true resistivities of the subsurface has been taken. From this study we conclude that the ERT method delineate very well the thickness of cultural layer and the buried archaeological objects inside it. The basement in Bylis area is presented with high resistivity values, characteristic for limestone. Whereas, in the "roman bath" area in Apollonia, the basement is with low resistivity values, characteristic for the clay layer.

Mankolli H.,Agricultural University of Tirana | Proko Jazexhiu V.,Academy of Science of Albania | Lika M.,University of Tirana
Journal of Environmental Protection and Ecology | Year: 2010

Mercury (Hg) in the Vlora gulf survey area exists in high levels for more than two decades now. This is the reason why there have been and there are still studies being carried out in this area. Hg is now considered as a potential polluter. The study is based on environmental and test indicators. The obtained indicators on land, water and plants give a summarised account of the Hg situation in this area. The utilised method was based on the opening of profiles and obtaining of samples according to distance from the source, the electrolysis section. The obtained results after the tests show that land and water media are polluted with Hg. From the plant tests it results that there are high amounts of Hg accumulated in the organ tissues of the plants. The plant species in the surveyed area absorb different Hg, levels, from Juncus acutus 0.115 up to 0.271 Kladofora. Based on the geometric average (GA) and the median (MED), according to distances from 25-100 m, the content of mercury results to be 0.9 in 500 mg/kg in the environment. The GA is in geographic proportion regarding the content. According to the geographic position of the surveyed environment, minimum values result on the northern and eastern part and the maximum ones on the western part at a GA value (mg/kg) 142.2 and MED (mg/kg) 421.8. This area with high Hg content becomes a cause not only for environmental pollution, but also pollution in animal and human beings and, stimulating carcinogenic diseases.

Tursi A.,University of Bari | Corselli C.,University of Milan Bicocca | Bushati S.,Academy of science of Albania | Beqiraj S.,University of Tirana
Journal of Coastal Research | Year: 2011

This volume collects the main results of 2 A years of multidisciplinary researches (2007-08) on the Vlora Gulf ecosystem, carried out by a joint Italian (National Interuniversity Consortium for Marine Sciences [CoNISMA], National Research Council [CNR, Consiglio Nazionale delle Ricerche] and Agenzia Regionale per la Prevenzione e la Protezione Ambientale [ARPA] Puglia) and Albanian (University of Tirana, the Science Academy, and the Ministry of the Environment) research team. The studies and analyses were aimed at identifying the environmental factors and components that strongly interact with, and affect, the marine ecosystem of the region. In particular, the main research tasks were related to geological and hydrogeological aspects of the river basins, the bottom morphology of the whole marine area, the problems of coastal erosion phenomena, the stratigraphy of the marine sediment, the physical and chemical parameters of the water column, an examination of primary production, the biodiversity of benthic and pelagic ecosystems, and the existence of problems connected to the ecotoxicology of the biota. The results pointed out the weakness to the Vlora Gulf ecosystem from several sources, including the (1) heavy human impacts on the natural coastal evolution, resulting in coastal erosion and/or accretion; (2) considerable influence of the input of suspended mud from the Vjosa River, causing conspicuous degeneration phenomena on the benthic biocoenoses (e.g., on the Posidonia oceanica meadow; and (3) conspicuous urban and industrial water discharge, producing diffuse pollution related to the presence of heavy metals (mercury, among others) in the sediments of the gulf area. Finally, a further aim of the project was the planning of an International Center for Marine Research, located in Albania, to support an international focal point for researchers involved in environmental studies of the Eastern Mediterranean. © 2011 Coastal Education and Research Foundation.

Frasheri N.,Academy of science of Albania | Beqiraj G.,Academy of science of Albania | Bushati S.,Academy of science of Albania | Frasheri A.,Polytechnic University of Tirana
European Space Agency, (Special Publication) ESA SP | Year: 2016

In the paper there is presented a review of remote sensing studies carried out for investigation of environmental changes in Albania. Using, often simple methodologies and general purpose image processing software, and exploiting free Internet archives of satellite imagery, significant results were obtained for hot areas of environmental changes. Such areas include sea coasts experiencing sea transgression, temporal variations of vegetation and aerosols, lakes, landslides and regional tectonics. Internet archives of European Space Agency ESA and US Geological Service USGS are used.

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