Bursa, Turkey
Bursa, Turkey

Uludag University is a university located in Bursa, Turkey. The research and education conducted by the university have an emphasis on medicine, engineering, natural science and art. In particular, Faculty of Medicine and Mechanical Engineering Department of Faculty of Engineering and Architecture have the most populated staff employed as academicians. The official language of instruction at Uludag University is Turkish and English. Wikipedia.

Time filter

Source Type

In this research, bending and drape properties of woven fabrics and the effect of weft density, weft yarn count and warp tension on these properties were investigated. Higher values were found for bending rigidities of the fabrics woven with thicker weft yarns and at higher weft densities. It was seen that bending rigidities of the fabrics in the warp directions increased as warp tension increased. Bending rigidities in the weft directions did not show any significant change, such as an increase or decrease depending on any change in warp tension. In the case of the fabrics woven with thicker weft yarns, the overall fabric bending rigidity increased as warp tension increased. Considering drape coefficients of the fabrics, it was observed that the drape coefficient increased as the weft density increased and weft yarn became thicker. The drape coefficient did not significantly vary depending on the variations in the warp tension. © The Author(s) 2012 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

Kaynakli O.,Uludag University
Renewable and Sustainable Energy Reviews | Year: 2014

Energy conservation has become an increasingly important issue for all sectors, particularly in industry. Therefore, the thermal performance of insulation systems and their influence on heat loss/gain in various applications in addition to economic considerations have received increased attention in recent years. In this study, a literature review of papers that addressed the optimum economic thickness of the thermal insulation on a pipe or duct with different geometries used in various industries was carried out. The studies related to determining the critical insulation thickness for different geometries including circular shapes were investigated. The heat transfer equations, the basic results, the optimization procedures and the economic analysis methods used in the studies were presented comparatively. Additionally, a practical application example based on optimizing the insulation thickness on a pipe was performed, and the effective parameters of the optimum thickness were investigated. © 2013 Elsevier Ltd. All rights reserved.

BACKGOUND: Hamstring strengthening after anterior cruciate ligament reconstruction is a vital component of the rehabilitation program. PURPOSE: The objective of this trial was to investigate the effects of hamstring isokinetic training used in the early phase of the rehabilitation program on the stability, strength, symptoms, and functional outcomes of patients throughout 12 months after anterior cruciate ligament surgery. STUDY DESIGN: Randomized controlled clinical trial; Level of evidence, 2. METHODS: Forty-eight men underwent anterior cruciate ligament reconstruction with an ipsilateral bone-patellar tendon-bone autograft. The patients were randomly assigned to perform daily isokinetic hamstring exercises at postoperative 3 weeks (group I) or to perform daily isokinetic hamstring exercises at postoperative 9 weeks (group II). The patients were evaluated monthly for the first 4 months and at the 12th month for postoperative hamstring and quadriceps strength, as well as for knee function via the Cincinnati Knee Rating Scale and International Knee Documentation Committee form. RESULTS: Hamstring isometric strength at 30 degrees of knee flexion (at the first and second months) and concentric isokinetic strength (at 2, 3, 4, and 12 months) at the angular velocity of 60 deg/s were significantly (P <.05-.01) greater in group I compared with group II. Average scores of the Cincinnati Knee Rating Scale for symptoms were significantly (P <.05-.001) higher in group I compared with group II at all evaluation periods. Walking and stair-climbing scores at 1, 2, 3, and 4 months and squatting score at all evaluation periods were also better (P <.05-.01) in group I compared with group II. In addition, group I exhibited better (P <.01-.001) Lachman test results compared with group II for all postoperative evaluation periods. The International Knee Documentation Committee final rating scores were significantly (P <.01) greater at 2, 3, and 4 months in group I compared with group II. CONCLUSION: The results of this study suggest that hamstring as well as quadriceps strength can be increased via early hamstring strengthening after anterior cruciate ligament reconstruction with no negative impact on knee function.

Salihoglu G.,Uludag University
Journal of Hazardous Materials | Year: 2010

A holistic evaluation of a country's hazardous waste management (HWM) practices is useful in identifying the necessary actions to focus on. Based on an analysis of industrial hazardous waste (HW) generation in Turkey, this paper attempts to critically evaluate and report current Turkish HWM practices and discuss the primary challenges to be addressed. The generation of industrial HW for Turkey reported in 2004 was 1.195. million. tons, which accounted for 7% of the total industrial solid waste (ISW) generated by the manufacturing industry, and for nearly 4.9% of the total solid waste generated in the country. The HW generated by the top five manufacturing product categories - basic metals, chemicals and chemical products, food and beverages, coke and refined petroleum, motor vehicles and trailers - accounted for 89.0% of total industrial HW. 21% of the HW generated in 2004 was recycled or reused, and 6% was sold or donated, whereas 73% was sent to ultimate disposal. 67% of the HW sent to ultimate disposal was disposed of at municipal landfills. The total capacity of the existing regional HW facilities is 212,500. tons/year, which accounts for about 24% of the HW to be disposed. Turkey has identified the HW problem in the country and enacted legislation, designated a lead agency, and promulgated rules and regulations. Several new initiatives are planned for improving HW management nationally; however, some HWM problems will be persistent due to previous and existing industrial development plans. These development policies led to the concentration of industry in regions marked by precious agricultural fields and high population density. This occurred because the government previously exhibited a default prioritization towards industrial development, leading to insufficient implementation of regulations on HW generators. Some of the problems may also be rooted in other countries that allow illegal transboundary HW movements despite international regulations. © 2009 Elsevier B.V.

Cindoruk S.S.,Uludag University
Chemosphere | Year: 2011

Air concentrations of organochlorine pesticides (OCPs) were measured at four different sites in Bursa, Turkey to determine current levels. For this purpose, about 35 samples were collected from June 2008 to June 2009 using a high volume air sampler (HVAS) equipped with particle and gas-phase units. Ten OCP compounds (alpha-, beta-, gamma-, delta-hexachlorocyclohexane, Heptachlor epoxide, Endrin, Endosulfan beta, Endrin aldehyde, p,p′-DDT and Methoxychlor) were reported within the scope of this study. The average concentrations of total (particle+gas) ∑OCPs were 550.9±277.6pgm-3 (coastal), 1030.7±453.5pgm-3 (urban/traffic), 519.7±277.5pgm-3 (semi-rural) and 722.8±351.8pgm-3 (urban/residential). The individual OCP concentrations were in line with reported concentrations. The maximum particle and gas-phase concentrations were determined for Endosulfan beta and beta-HCH for all sites, respectively. Available gas/particle partitioning models were applied in order to investigate the compatibility of the experimental data and the significant relationships were observed. © 2010 Elsevier Ltd.

Kaynakli O.,Uludag University
Renewable and Sustainable Energy Reviews | Year: 2012

Energy conservation is an increasingly important issue for the residential sector. Therefore, attention towards the thermal performance of building materials, particularly thermal insulation systems for buildings, has grown in recent years. In this study, a literature review on determining the optimum thickness of the thermal insulation material in a building envelope and its effect on energy consumption was carried out. The results, the optimization procedures and the economic analysis methods used in the studies were presented comparatively. Additionally, a practical application on optimizing the insulation thickness was performed, and the effective parameters on the optimum value were investigated. © 2011 Elsevier Ltd. All rights reserved.

Atrazine is a selective triazine herbicide used to control broadleaf and grassy weeds mainly in corn, sorghum, sugarcane, pineapple, and other crops, and in conifer reforestation planting fields. It has been showed that atrazine is one of the most frequently detected pesticides in agricultural streams and rivers, over the past two decades. Although the toxic properties of atrazine are well known, the data on the genotoxic effects of atrazine on aquatic organisms are rather scarce. Thus, in the present study we aimed to evaluate the genotoxic effects of atrazine and an atrazine-based herbicide (Gesaprim®) on a model fish species Carassius auratus L., 1758, (Pisces: Cyprinidae) using the micronucleus test and the comet assay in peripheral blood erythrocytes. Fish were exposed to 5, 10 and 15μg/L atrazine and to its commercial formulation for 2, 4 and 6. days. Ethyl methane sulfonate (EMS) at a single dose of 5. mg/L was used as positive control. Our results revealed significant increases in the frequencies of micronuclei and DNA strand breaks in erythrocytes of C. auratus, following exposure to commercial formulation of atrazine and thus demonstrated the genotoxic potential of this pesticide on fish. © 2011 Elsevier Ltd.

Tosun L.P.,Uludag University
Computers in Human Behavior | Year: 2012

A survey on 143 university students was conducted to examine what motives young adults have for Facebook use, which of those motives were endorsed more than the others, and how those motives were related to the tendency of expressing one's "true self" through Facebook use. According to the results, primary motive for Facebook use was to maintain long-distance relationships. This motive was followed by game-playing/entertainment, active forms of photo-related activities, organizing social activities, passive observations, establishing new friendships, and initiating and/or terminating romantic relationships. Another interesting result was that individuals' tendency for expressing one's true self on the Net had an influence on their Facebook use motives: The ones with high tendency to express their true self on the Internet reported to use Facebook for establishing new friendships and for initiating/terminating romantic relationships more than the individuals' with low and medium levels of the same tendency did. © 2012 Elsevier Ltd. All rights reserved.

Yagmahan B.,Uludag University
Expert Systems with Applications | Year: 2011

Mixed-model assembly lines are production systems at which two or more models are assembled sequentially at the same line. For optimal productivity and efficiency, during the design of these lines, the work to be done at stations must be well balanced satisfying the constraints such as time, space and location. This paper deals with the mixed-model assembly line balancing problem (MALBP). The most common objective for this problem is to minimize the number of stations for a given cycle time. However, the problem of capacity utilization and the discrepancies among station times due to operation time variations are of design concerns together with the number of stations, the line efficiency and the smooth production. A multi-objective ant colony optimization (MOACO) algorithm is proposed here to solve this problem. To prove the efficiency of the proposed algorithm, a number of test problems are solved. The results show that the MOACO algorithm is an efficient and effective algorithm which gives better results than other methods compared. © 2010 Elsevier Ltd. All rights reserved.

Uludag University | Date: 2014-01-10

A prophylactic or therapeutic agent is provided for depression (including each subtype according to DSM-IV of depression) or anxiety by increasing the levels of serotonin in the brain includes administration of glycyl-glutamine or cyclo glycyl-glutamine, a derivative that could cross the blood-brain barrier and could be used in peripheral applications.

Loading Uludag University collaborators
Loading Uludag University collaborators