University of Vlora

Vlorë, Albania

University of Vlora

Vlorë, Albania
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PubMed | University of Tirana, National Museum of Natural History, University Valahia of Targoviste, University of Vienna and 26 more.
Type: Journal Article | Journal: Environmental science and pollution research international | Year: 2016

For analysing element input into ecosystems and associated risks due to atmospheric deposition, element concentrations in moss provide complementary and time-integrated data at high spatial resolution every 5years since 1990. The paper reviews (1) minimum sample sizes needed for reliable, statistical estimation of mean values at four different spatial scales (European and national level as well as landscape-specific level covering Europe and single countries); (2) trends of heavy metal (HM) and nitrogen (N) concentrations in moss in Europe (1990-2010); (3) correlations between concentrations of HM in moss and soil specimens collected across Norway (1990-2010); and (4) canopy drip-induced site-specific variation of N concentration in moss sampled in seven European countries (1990-2013). While the minimum sample sizes on the European and national level were achieved without exception, for some ecological land classes and elements, the coverage with sampling sites should be improved. The decline in emission and subsequent atmospheric deposition of HM across Europe has resulted in decreasing HM concentrations in moss between 1990 and 2010. In contrast, hardly any changes were observed for N in moss between 2005, when N was included into the survey for the first time, and 2010. In Norway, both, the moss and the soil survey data sets, were correlated, indicating a decrease of HM concentrations in moss and soil. At the site level, the average N deposition inside of forests was almost three times higher than the average N deposition outside of forests.


Serdari E.,Polytechnic University of Tirana | Berberi P.,Polytechnic University of Tirana | Mico S.,University of Vlora | Hasanaj A.,University of Vlora | Puci I.,University of Vlora
AIP Conference Proceedings | Year: 2016

The aim of this paper is to determine the wind energy potential for electricity generation in Tirana. The wind characteristics and wind energy potential are analyzed using the data collected during a period of four years (April 2008 - March 2012). The Weibull parameters (k and c) were determined based on the wind distribution statistics calculated from the measured data, using the Maximum Likelihood Method. The wind data in relative frequency format is obtained from these calculated Weibull parameters. Both time-series format and Weibull representative wind speed data are used to calculate the wind energy output of three specific wind turbines. The monthly mean wind speed and the power density were computed. Results obtained show that the annual mean wind speed varies between 2.910 m/s to 6.356 m/s. The results show that this site is good for small-scale application wind turbines. © 2016 AIP Publishing LLC.


Qarri F.,University of Vlora | Lazo P.,University of Tirana | Bekteshi L.,University of Tirana | Stafilov T.,University of Macedonia | And 2 more authors.
Environmental Science and Pollution Research | Year: 2014

The atmospheric deposition of heavy metals in Albania was investigated by using a carpet-forming moss species (Hypnum cupressiforme) as bioindicator. Sampling was done in the dry seasons of autumn 2010 and summer 2011. Two different sampling schemes are discussed in this paper: a random sampling scheme with 62 sampling sites distributed over the whole territory of Albania and systematic sampling scheme with 44 sampling sites distributed over the same territory. Unwashed, dried samples were totally digested by using microwave digestion, and the concentrations of metal elements were determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES) and AAS (Cd and As). Twelve elements, such as conservative and trace elements (Al and Fe and As, Cd, Cr, Cu, Ni, Mn, Pb, V, Zn, and Li), were measured in moss samples. Li as typical lithogenic element is also included. The results reflect local emission points. The median concentrations and statistical parameters of elements were discussed by comparing two sampling schemes. The results of both sampling schemes are compared with the results of other European countries. Different levels of the contamination valuated by the respective contamination factor (CF) of each element are obtained for both sampling schemes, while the local emitters identified like iron-chromium metallurgy and cement industry, oil refinery, mining industry, and transport have been the same for both sampling schemes. In addition, the natural sources, from the accumulation of these metals in mosses caused by metal-enriched soil, associated with wind blowing soils were pointed as another possibility of local emitting factors. © 2014 Springer-Verlag Berlin Heidelberg.


Qarri F.,University of Vlora | Lazo P.,University of Tirana | Stafilov T.,University of Macedonia | Frontasyeva M.,Joint Institute for Nuclear Research | And 4 more authors.
Environmental Science and Pollution Research | Year: 2014

For the first time, the moss biomonitoring technique and inductively coupled plasma-atomic emission spectrometric (ICP-AES) analytical technique were applied to study multi-element atmospheric deposition in Albania. Moss samples (Hypnum cupressiforme) were collected during the summer of 2011 and September-October 2010 from 62 sites, evenly distributed over the country. Sampling was performed in accordance with the LRTAP Convention-ICP Vegetation protocol and sampling strategy of the European Programme on Biomonitoring of Heavy Metal Atmospheric Deposition. ICP-AES analysis made it possible to determine concentrations of 19 elements including key toxic metals such as Pb, Cd, As, and Cu. Cluster and factor analysis with varimax rotation was applied to distinguish elements mainly of anthropogenic origin from those predominantly originating from natural sources. Geographical distribution maps of the elements over the sampled territory were constructed using GIS technology. The median values of the elements in moss samples of Albania were high for Al, Cr, Ni, Fe, and V and low for Cd, Cu, and Zn compared to other European countries, but generally were of a similar level as some of the neighboring countries such as Bulgaria, Croatia, Kosovo, Macedonia, and Romania. This study was conducted in the framework of ICP Vegetation in order to provide a reliable assessment of air quality throughout Albania and to produce information needed for better identification of contamination sources and improving the potential for assessing environmental and health risks in Albania, associated with toxic metals. © 2013 Springer-Verlag Berlin Heidelberg.


Bekteshi L.,University of Tirana | Lazo P.,University of Tirana | Qarri F.,University of Vlora | Stafilov T.,University of Macedonia
Ecological Indicators | Year: 2015

The present paper concerns the study of atmospheric deposition of heavy metals, using a carpet-forming-moss species (Hypnum cupressiforme) as a bioindicator. It provides a complementary method to evaluate elemental deposition from the atmosphere to terrestrial systems. Compared with conventional precipitation analysis, it is an easier and cheaper method that ensures a high sampling density over the monitored area. The moss samples were collected over the whole territory of the country by following, more or less, a systematic sampling scheme, which is often used in environmental studies because it is convenient to implement in field campaigns, often providing good precision and complete coverage of the target population compared with random sampling. The 2010/2011 ICP vegetation moss survey data were used in this study. The unwashed, dried samples were digested completely by the microwave digestion method. The concentration (C) of selected trace metals (As, Cr, Cu, Ni, V and Zn) and conservative metals (Al, Li and Fe) were determined by ICP-AES and AAS (Cd and As) methods. To characterize the natural and the anthropogenic pattern of heavy metal deposition throughout the whole territory, the normalization process using lithium as a normalizing element was carried out on the C data for 11 elements of 44 moss samples. The obtained data set was used to compensate the natural variability of trace metals, so that the anthropogenic metal contributors could be detected and quantified. Descriptive statistics and multivariate analyses were used for the statistical treatment of the normalized concentration (NC) data using the MINITAB 17 software package. The statistical parameters of the NC data are discussed. The level of contamination was evaluated by calculating the enrichment factors, whereas the most probable local anthropogenic emitter sources were identified. The statistical analysis of NC data demonstrated that the normalization process is useful for evaluating the relative contributions of anthropogenic and natural sources of elemental deposition from the atmosphere to terrestrial systems, when the main pollution sources are from fine dust particles. © 2015 Elsevier Ltd. All rights reserved.


Ibrahimi K.,University of Vlora
Developments in Maritime Transportation and Exploitation of Sea Resources - Proceedings of IMAM 2013, 15th International Congress of the International Maritime Association of the Mediterranean | Year: 2014

In a territorial, operational and institutional seaport cluster of social-economic activities and actors in or about its primary function of transfer for goods and people between the sea and land vehicles, it is quite natural to see if seaport firms and functions may be conceptualized at the same basis. This is not just an objective per se, but it is very important as it is much related to the short-and long-term functioning of ports. It will be this paper's purpose to demonstrate a strong link between seaport operational and institutional firms and functions and the governance, administration and management of seaport resources and activities, in what I call the Gov-Ad-Man approach. This approach will be based on property rights, and at the same time will serve to clarify the meaning of the very controversial terms of governance, administration and management. © 2014 Taylor & Francis Group, London.


Ibrahimi K.,University of Vlora
Developments in Maritime Transportation and Exploitation of Sea Resources - Proceedings of IMAM 2013, 15th International Congress of the International Maritime Association of the Mediterranean | Year: 2014

The starting point for any economic analysis of seaport activity is a clear definition of the concept of a seaport and an understanding of the institutional context (Meersman et al. 2007). In the port sector, there is an increased emphasis among researchers on rethinking the nature, boundary and role of the port (Mangan 2008). Thereby, the aim of this paper is to be added to few researches up today explaining why and how to conceptualize ports. In this paper, a contextual and cluster approach will be taken. A full idea of a seaport as a social-economic organization may be established if six different contexts are explored, with the most important concepts and models applied here in: space, time, social-economic, functional, organizational and institutional. An appropriate model and a new comprehensive definition of a port cluster will be interpreted. © 2014 Taylor & Francis Group, London.


Corriero N.,University of Vlora
Proceedings - 1st International Conference on Data Compression, Communication, and Processing, CCP 2011 | Year: 2011

Squash FS is a Linux compress file system. Hixosfs is a file system to improve file content search by using metadata information's. In this paper we propose to use Hixosfs idea in Squash FS context by creating a new file system HSFS. HSFS is a compress Linux file system to store metadata within nodes. We compare our idea with other common solutions. We test our idea with DICOM file used to store medical images. © 2011 IEEE.


PubMed | University of Vlora
Type: Comparative Study | Journal: Environmental science and pollution research international | Year: 2015

The atmospheric deposition of heavy metals in Albania was investigated by using a carpet-forming moss species (Hypnum cupressiforme) as bioindicator. Sampling was done in the dry seasons of autumn 2010 and summer 2011. Two different sampling schemes are discussed in this paper: a random sampling scheme with 62 sampling sites distributed over the whole territory of Albania and systematic sampling scheme with 44 sampling sites distributed over the same territory. Unwashed, dried samples were totally digested by using microwave digestion, and the concentrations of metal elements were determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES) and AAS (Cd and As). Twelve elements, such as conservative and trace elements (Al and Fe and As, Cd, Cr, Cu, Ni, Mn, Pb, V, Zn, and Li), were measured in moss samples. Li as typical lithogenic element is also included. The results reflect local emission points. The median concentrations and statistical parameters of elements were discussed by comparing two sampling schemes. The results of both sampling schemes are compared with the results of other European countries. Different levels of the contamination valuated by the respective contamination factor (CF) of each element are obtained for both sampling schemes, while the local emitters identified like iron-chromium metallurgy and cement industry, oil refinery, mining industry, and transport have been the same for both sampling schemes. In addition, the natural sources, from the accumulation of these metals in mosses caused by metal-enriched soil, associated with wind blowing soils were pointed as another possibility of local emitting factors.


PubMed | University of Prishtina, University of Tirana, University of Vlora and UK Center for Ecology and Hydrology
Type: Journal Article | Journal: Environmental science and pollution research international | Year: 2016

Bryophytes act as bioindicators and bioaccumulators of metal deposition in the environment. The atmospheric deposition of Cd, Cr, Cu, Fe, Hg, Ni, Mn, Pb, and Zn in Kosovo was investigated by using carpet-forming moss species (Pseudocleropodium purum and Hypnum cupressiforme) as bioindicators. This research is part of the European moss survey coordinated by the ICP Vegetation, an International Cooperative Programme reporting on the effects of air pollution on vegetation to the UNECE Convention on Long-range Transboundary Air Pollution. Sampling was performed during the summer of 2011 at 25 sampling sites homogenously distributed over Kosovo. Unwashed, dried samples were digested by using wet digestion in Teflon tubes. The concentrations of metal elements were determined by atomic absorption spectrometry (AAS) equipped with flame and/or furnace systems. The heavy metal concentration in mosses reflected local emission sources. The data obtained in this study were compared with those of similar studies in neighboring countries and Europe (2010-2014 survey). The geographical distribution maps of the elements over the sampled territory were constructed using geographic information system (GIS) technology. The concentrations of Cr, Ni, Pb, and Zn were higher than the respective median values of Europe, suggesting that the zones with heavy vehicular traffic and industry emission input are important emitters of these elements. Selected zones are highly polluted particularly by Cd, Pb, Hg, and Ni. The statistical analyses revealed that a strong correlation exists between the Pb and Cd content in mosses, and the degree of pollution in the studied sites was assessed.

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