In this paper, we develop a technique which enables us to obtain several results from the theory of Γ-semigroups as logical implications of their semigroup theoretical analogues.

Our study aims at defining the reasons of a downward trend of remittances in Albania lately. We mainly adopted the method of the questionnaire to study such a topic. Our questionnaire covers Albanian migrants in Greece and Italy. The analyses of the data provided by our questionnaire defines such factors influencing the level of the remittances: -The economic crises i.e. the economic situation in the host country; -Job insecurity and wage lowering; -Living cost increase as well as rising costs of children's education; -Family reunion; -Weaker links of the migrants and his family members in Albania. Our study attempts that using rather simple methods to rank the factors influencing the money flow of the remittances based on their importance. There is quite a host of methods to analyze the main factors yet we adopted one of the simplest methods that of the contingences tables and Log-Linear Models for Contingency Tables as the data offered by the questionnaire are subjective ones and not so massive, too. The data on the money flow of the remittances are rather few and unstable ones thus all the predictions based on all other methods offer similar results. We stress the fact that it is beyond any doubt that the remittances follow a downward trend every year. Judging by the models there is a very law probability to this series that it changes its trend (i.e.it increases). The main factors influencing the flow of the remittances to Albania are the economic crises and the family reunion.

Waste management system needs a clear and strict management policy. They also need a process of evaluating and selecting the most appropriate landfill sites that respect the restrictions and constraints dictated by the presence of the population in that area, with respect to ecological ecosystems and other factors. In addition to the geographical and geological criteria and other specifications that are defined by traditional selection procedures, there are new factors adding to the old constraints and limitations. Urban waste is produced in large quantities in our cities, every year. As a result, the number of sites should increase with the population growth as well as the increase in urban waste products. On the other hand, the eligibility criteria and adding constraints and limitations make it more difficult to choose suitable sites. Environmental and local and state regulations limit the number of choices as well as areas and volume of sites making their selection more difficult, posing a real challenge for specialists. Specialists need to use the Geographic Information System (GIS) as well as the method of Multiple Critical Decision Analysis (MCDA) to select the most optimal location. Our study aims to apply MCDA integrated with GIS to select potential sites for urban waste deposition. The method of hierarchy analysis (AHP) will be used to weight and rank the constraints and criteria. This article is part of a potential project we are working to propose to Berat County, Albania.

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