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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.

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.

In the current study, the mechanical behaviour, damage initiation and propagation properties of 2 × 2-twill woven carbon composites with various fibre volume fractions, under uni-axial tension in the warp direction, were investigated. Observations of damage were made using acoustic emission (AE), x-ray and microscopy techniques. The mechanical properties and strain values of the composite damage thresholds were determined. The strain levels at which AE events were recorded for the first time (i.e. the ε min values) were affected by variations in fibre volume fraction; however, characteristic strain values indicating damage initiation (i.e. ε 1 and ε 2) were not affected by variations in fibre volume fraction. © The Author(s) 2011.

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.

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.

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