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In this study, a bond-slip model is proposed to take into account the effects of corrosion on the bond characteristics between extremely low-strength concrete and plain reinforcing bars. The proposed bond-slip model is based on reversed cyclic lateral loading tests of nearly full-scale reinforced concrete columns with reinforcing bars corroded to different levels. The columns taken into consideration during the current study were part of an extensive experimental program designed to study the performance of older columns at Istanbul Technical University. The columns were representative of a large number of underperforming reinforced concrete buildings prone to seismic actions throughout the world. Test results demonstrated that the corrosion of reinforcing bars had a significant effect on the strength and deformability characteristics of substandard reinforced concrete columns subjected to the combined actions of axial and reversed cyclic lateral loads. Taking this aspect into consideration, a novel bond-slip model is established to estimate the variation in bond strength degradation and the bond strength as a function of the level of corrosion of the reinforcing bars. Furthermore, the predictions of the proposed model are also verified with experimental results from the literature. [ABSTRACT FROM AUTHOR]

Purpose The purpose of this study is to investigate library cooperation among the libraries of Turkish higher education institutions in the changing global environment.Design/methodology/approach This study has been carried out with ILL librarians working in state and foundation university libraries in Turkey. The survey was sent to 140 inter library loan (ILL) librarians who were asked to answer 35 questions both open and closed. There were 100 responses which is an excellent response rate of 72 per cent. It was conducted with VETI (Data Collection and Statistics), which is a web-based form application developed by Istanbul Technical University.Findings Turkish libraries are taking the opportunities offered by technical developments to serve their users with instant information by providing access to electronic resources and transferring their collections to electronic media. Reconstruction of ILL services to fulfill users’ needs is inevitable because of the increasing expectations of users and emerging alternatives to access information.Originality/value This is the first systematic national investigation into the state of ILL in Turkish libraries. [ABSTRACT FROM AUTHOR]

This paper analyzes the passenger-carpooling potential among undergraduate students using a model for estimating choice based on combined revealed and stated preference data. The data are obtained from a survey performed at four campuses of Istanbul Technical University. The case in focus is carpooling as a passenger; carpooling as a driver is deliberately left out because of students' lack of familiarity with it. The hypothetical passenger-carpooling scenarios lead to enquiries about the fee students are willing to pay and the distance they are willing to walk to a designated pick-up location. The estimation results show that females and frequent campus travelers are more likely to prefer passenger carpooling. The scenario analysis included in the paper reveals the prioritization of carpool fee over walking distance to pick-up locations among undergraduate students. [ABSTRACT FROM AUTHOR]

The purpose of this study is to test the applicability of k 0 -INAA method at the Istanbul Technical University TRIGA Mark II research reactor. The neutron spectrum parameters such as epithermal neutron flux distribution parameter ( α ), thermal to epithermal neutron flux ratio ( f ) and thermal neutron flux ( φ th ) were determined at the central irradiation channel of the ITU TRIGA Mark II research reactor using bare triple-monitor method. HPGe detector calibrations and calculations were carried out by k 0 -IAEA software. The α , f and φ th values were calculated to be −0.009, 15.4 and 7.92·10 12 cm −2 s −1 , respectively. NIST SRM 1633b coal fly ash and intercomparison samples consisting of clay and sandy soil samples were used to evaluate the validity of the method. For selected elements, the statistical evaluation of the analysis results was carried out by z -score test. A good agreement between certified/reported and experimental values was obtained. [ABSTRACT FROM AUTHOR]

Purpose of this paper is to explore how resistance of individual and collective actors play role in maintenance and change of institutions. Framing tactics of two emerging social movements in Istanbul Technical University and Middle East Technical University, which emerged against institutional changes in Turkish higher education, were examined by hybrid ethnography, using both online and offline data sources. Findings show that framing tactics of institutional entrepreneurs comprise different discourses and different forms of power, which also vary during different life stages of these movements. This paper contributes to existing literature in three ways. First power dynamics in institutional change, which is mostly disregarded in institutional theory, is taken into consideration. Second, with a longitudinal comparative study, it is shown that outcomes of social movements with similar demands may diverge according to different framing tactics based on power mechanisms that appealed at different stages of their life cycle. Third, this paper, as one of the few examples of a hybrid ethnographic approach, underlines the key role of considering both offline--online data sources, as an important part of actors' life that take place in the online world. [ABSTRACT FROM AUTHOR]

Environmental risk is a measure of potential threats to the environment and combines the probability that events will cause or lead to degradation of the environment and the severity of that degradation. Evaluation of environmental risk factors requires linguistic terms to be used rather than exact numerical assignments. The fuzzy set theory provides a useful tool for converting linguistic terms into numerical evaluations. In this article, we will try to select the best location for the Faculty of Management of the Istanbul Technical University taking care of the predetermined environmental criteria by using fuzzy TOPSIS. The decision matrix is composed of linguistic evaluations for the alternatives with respect to the environmental risk criteria. The Macka Campus area has been selected after the multicriteria evaluation. A sensitivity analysis is also realized to see if the minor changes in criteria weights cause any change in the ranking of alternatives. Unless the importance of the criteria rock or soil structure, remoteness to health facilities, transportation availability, and transportation costs is changed to be from low to extremely low importance, the Macka Campus is still the selected alternative. [ABSTRACT FROM PUBLISHER]

This paper aims to describe the modification of the radial beam port of ITU (İstanbul Technical University) TRIGA Mark II research reactor for BNCT applications. Radial beam port is modified with Polyethylene and Cerrobend collimators. Neutron flux values are measured by neutron activation analysis (Au–Cd foils). Experimental results are verified with Monte Carlo results. The results of neutron/photon spectrum, thermal/epithermal neutron flux, fast group photon fluence and change of the neutron fluxes with the beam port length are presented. [ABSTRACT FROM AUTHOR]

The current study aimed to investigate the relationship between Internet addiction and problem solving skills of university students. The study also examined the psychometric properties of the Turkish version of Problematic Internet Entertainment Use Scale for Adolescents, which centers on major Internet entertainments such as online video games and social networking sites, specifically with regard to normative, reliability, and validity information. Problem Solving Inventory was utilized in order to measure the problem solving skills of students. Both instruments were administered to 371 students aged 17 to 36 years from different departments in Marmara University and Istanbul Technical University (Istanbul, Turkey). This study showed that the Turkish version of the Problematic Internet Entertainment Use Scale for Adolescents was a reliable and valid instrument for measurement of maladaptive patterns in the use of online entertainments such as OVG and SNS. The results revealed that there is a close relationship between problematic internet entertainment use and Avoidant ( r = 443; p < .01) and Impulsive problem solving styles ( r = .402; p < .01) among university students. [ABSTRACT FROM AUTHOR]