Sustainable development of the Prefecture of Kephalonia
An optimisation methodology is applied on the islands of Kephalonia and Ithaca (Prefecture of Kephalonia) in Greece, where various Renewable Energy Sources (RES) can be found and could be exploited to satisfy part of their energy needs. These resources are examined and a case study is performed for Kephalonia that involves an application of specific mathematical tools that will lead to a set of energy solutions. Many scenarios of cases were examined where the requirements of certain end uses were increased and also cases where some of the renewable energy systems were not at the maximum of their potential.
Multicriteria analysis of Renewable Energy Sources (RES) utilisation in waste treatment facilities: the case of Chania prefecture, Greece
Greece's current solid waste management system faces important environmental challenges that make it non-sustainable. There is a need to move towards an integrated solid waste management that shall include systems in the frames of 'sustainable development' approach. An optimisation methodology is applied in Greece, where various Renewable Energy Sources (RESs) could be exploited to satisfy part of the existing and proposed waste management facilities' energy needs. An application of multicriteria analysis and many scenarios were examined in the cases where the requirements of certain end uses were increased and where RES could not contribute at the maximum of their potential.
CATARACT: A HISTORICAL PERSPECTIVE.
The earliest extant description of a surgical operation for the cure of cataract is that of Celsus, toho practiced medicine in Rome at the beginning of the Christian era. In his text De Meclicina he described in detail his method of couching, by which he inserted a bronze needle into the eye at the equator on the lateral side of ihe globe and depressed the cataract downward into the lower part of the vitreous where the surgeon hoped it would remain out of the way of vision. The same method had been employed by the Greeks and Hindus for at least several hundred years earlier and ivas to continue as the only operation available until the middle of the eighteenth century when Daviel of Paris described extraction of the lens through the cornea. The early couchers worked on the premise that the crystallin humor we know as the lens was the receptor for vision, and that in certain conditions of disease a suffusion flowed doivn in front of the crystallin humor where it solidified and formed a dense curtain. The purpose of couching was to press the hardened corrupt humor out of the way of the lens. That cataract was opaque material within the lens itself was not recognized until after the middle of ihe seventeenth century. Until then ihe surgeons were not even aware that it was the lens they were dislocating.