Istanbul Technical University

About: Istanbul Technical University is a education organization based out in Istanbul, Turkey. It is known for research contribution in the topics: Fuzzy logic & Large Hadron Collider. The organization has 12889 authors who have published 25081 publications receiving 518242 citations. The organization is also known as: İstanbul Teknik Üniversitesi & Technical University of Istanbul.

Application of fuzzy extended AHP methodology on shipping registry selection: The case of Turkish maritime industry

Abstract: Selection of the suitable shipping registry alternative for the existing fleet or new building ships is one of the critical decision milestones of the shipping business. The main aim of this paper is to structure a practical decision support mechanism on ensuring multiple criteria analysis of shipping registry selection. Fuzzy AHP methodology, based on Chang's extent analysis, is determined to be utilized in order to model the shipping registry selection. After structuring the fundamental hierarchy, the model is performed with a case application on Turkish maritime industry to be able to obtain illustrative results. The shipping registries of Turkiye, Panama, and Malta are determined to evaluate as the potential alternatives for Turkish ship owners. When the literature was examined for the applications of analytical methodologies on maritime business, it was seemed that they were so rare. Therefore, the originality of this study appears on modeling of the critical process under multidisciplinary philosophy in ship management.

Trends in surface air temperature data over Turkey

Abstract: Eighteen stations are considered for the study of climatic records over Turkey in search for possible trends. Mean, unfiltered, seasonal and annual maximum and minimum temperatures are analysed using the Mann–Kendall rank statistic to demonstrate any existence of possible trends. The analyses indicate that the mean annual temperature records in Turkey have a warming trend over the 1939 to 1989 period, but a cooling trend from 1955 to 1989. These trends in mean annual temperatures, however, are not statistically significant. Comparatively greater warming effects have occurred in spring and winter minimum rather than the maximum temperature records. A regional increase in the mean minimum temperature around 1955 is attributed to the urban heat island effect. In general, general circulation models (GCM) predictions are consistent with the sign of the trends only in Turkish climate records during the entire 1939 to 1989 period © 1977 by the Royal Meteorological Society. Int. J. Climatol. 17: 511–520 (1997).