The buildings are among major energy consumers, whose energy efficiency is rather low. Clerestory windows are responsible for a large portion of energy losses from the buildings. The energy efficiency of buildings can greatly be improved by upgrading clerestory and other windows. This paper focuses on the theoretical and experimental investigations on how this can be performed in an old school building in the town of Bor in eastern part of Serbia. For that purpose a modern measuring technique has been applied to identify the existing status, and to compare theoretical and actual conditions.
Uvod orišćenje biomaterijala datira još iz drevnih vremena. Veštačke oči, uši, zubi itd. nađeni su još na egipatskim mumijama, dok su Kinezi i Indijanci koristili razne voskove, lepkove i tkiva za rekonstrukciju nedostajućih ili oštećenih delova tela. Današnji stupanj razvoja veštačkih materijala, tehnika operisanja i metoda sterilizacije omogućava korišće-nje biomaterijala za najrazličitije svrhe. Biomaterijali u obliku implantata (veštačke kosti i zglobovi, ligamenti, srčani zalisci, očna sočiva, zubni implantati itd.) i medicinski uređaji (pejsmejkeri, biosenzori, veštačka srca itd.) vrlo često se koriste za zamenu i/ili nadomeštanje funkcije oštećenih ili degenerisanih tkiva ili organa, za poboljšavanje funkcije, korekciju abnormalnosti, odnosno poboljšavanje kvaliteta života pacijenata [1]. Biomaterijali moraju da poseduju odgovarajuće karakteristike, čak i pri radu u veoma teškom okruženju, kakvo je ljudsko telo. Primera radi, pH vrednost telesnih tečnosti raznih tkiva u ljudskom organizmu varira u rasponu od 1 do 9. Tokom dnevnih aktivnosti, ljudske kosti su opterećene napoNapomena: Ovaj rad finansijski je podržalo Ministarstvo prosvete i nauke Republike Srbije u okviru projekta III41017 i TR34005.
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