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Search Results: 1 - 10 of 230047 matches for " Yücel Güney "
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The 2011 Earthquake in Simav, Turkey and Seismic Damage to Reinforced Concrete Buildings
Adem Do?angün,Ali Ural,Halil Sezen,Yücel Güney,Fatih Kür?at F?rat
Buildings , 2013, DOI: 10.3390/buildings3010173
Abstract: Reinforced concrete buildings suffered significant damage in the region affected by the 29 May 2011 earthquake in Simav (Kutahya), Turkey. Typical building damage is classified and potential causes of damage are investigated. Reinforced concrete moment resisting frames with hollow brick infill walls are the most common structural system in and around the Simav city center while masonry construction is common in rural areas. Although the Simav earthquake, with a magnitude of 5.7 to 5.9, can be classified as a moderate earthquake, many buildings experienced damage varying from frequent diagonal cracking and brittle failure of infill walls to collapse or severe damage to frames due to short columns, soft stories or other reasons including insufficient or poor detailing of reinforcement. This study investigates and presents the seismicity of the region, characteristics of the measured ground motions, seismic load demands including response spectra, and damage mechanisms, potential causes and classification of observed damage in reinforced concrete buildings.
Earthquake and Physical and Social Vulnerability Assessment for Settlements: Case Study Avc lar District
Gül YüCEL,G?rün ARUN
Megaron , 2010,
Abstract: Many settled areas in Turkey and across the globe suffer economical and social losses resulting from natural disasters such as earthquakes, floods, hurricanes and landslides. In this study, a vulnerability assessment model has been developed for earthquake prone areas in Turkey. The vulnerability assessment model includes ground factors, a building’s physical conditions, building evacuation and social (demographic and socioeconomic) aspects of the settlement. The ground vulnerability factor is calculated using factors such as the earthquake zone, soil classification, land sliding and liquefaction threats. The physical vulnerability factor depends on the structural and non-structural threats of the building; the building evacuation vulnerability factor includes the position and structural system of the staircase, the width and natural illumination of the evacuation route, the size and opening of the building exit doors to the street and the distance of the building to the closest open area. The social vulnerability factor considers the age group, gender, family type, education, ownership, income etc of the building users. This vulnerability assessment model is applied to a case study - that of the Avc lar district of Istanbul. Forty different reinforced concrete residential buildings (349 apartments) of 1225 people are assessed using the develop checklist. In order to evaluate the checklist and to assess the importance (relevance) of vulnerability factors, a questionnaire is forwarded to various related professional groups (architecture, urban planning and civil engineering). The results of the questionnaire are examined using SPSS software with factor analysis. According to the results, most of the samples in the case study area can be classified as high vulnerable.
Pakistan Journal of Botany , 2008,
Abstract: Pinus L. and Carpinus L. are the two widely distributed genera of gymnosperms being represented by 80 and 170 species respectively. The former has 5 species in Turkey and latter 2 species namely; P.pinea, P.halepensis, P.brutia, P.sylvestris, P.nigra ssp. pallasiana, Carpinus betulus and C.orientalis. In this paper an attempt has been made to present an overview of the geobotanical structure of Pinus sylvestris L. and Carpinus betulus L. in Turkey. Out of 20.2 million hectares of forests in Turkey yellow pine covers nearly 1.3 million ha and hornbeam species around 10 thousand ha. The forests of P. sylvestris are found in North, Northeast Anatolia, on Murat mountains around Kutahya and C. betulus mainly in Thrace, Marmara, Black Sea and Inner Anatolia. P. sylvestris is represented by 9 associations; Pinus sylvestris-Vaccinum myrtillus, Pinus sylvestris - Daphne glomerata, Pinus sylvestis - Astragalus adzharicus, Pinus sylvestris-Lilium ciliatum, Pinus sylvestris-Daphne pontica, Pinus sylvestris-Populus tremula, Populo-Pinetum sylvestris, Pinus sylvestris-Orthilio secundo, Pinus sylvestris f.lazica-Epimedium pinnatum subsp.colchicum, Triseto-Pinetum sylvestris, whereas C. betulus has only 6 associations Carpinus betulus-Scaligeria tripartita, Carpinus betulus-Acer campestre, Quercus petraea ssp. iberica-Carpinus betulus, Carpinus betulus-Quercus petrae ssp. iberica, Fagus orientalis-Carpinus betulus. P.sylvestris associations are floristically rich having 275 taxa as compared to C.betulus forests which embody only 121 taxa. The life form spectrum of P.sylvestris forests includes 146 chamaephytes, 44 hemicryptophytes, 40 phanerophytes, 28 cryptophytes and 17 therophytes, whereas C.betulus forests include 23 phanerophytes, 39 chamephytes, 36 hemicryptophytes,14 cryptophytes and 8 therophytes. Phytogeographically a major part of the taxa in P.sylvestris forests are Euro-Siberian elements (24.4 %) followed by the Irano-Turanian (6.4 %) and Mediterranean (1.4 %). In C.betulus forests the distribution is as follows; Euro-Siberian-Euxine elements ( 83 %) followed by Mediterranean (14 %) and Irano-Turanian (3%). These observations stress the fact that geobotanically these forests prefer mainly high altitude moist habitats in the north and northeastern parts of Turkey.
Voltammetric Behaviour of Sulfamethoxazole on Electropolymerized-Molecularly Imprinted Overoxidized Polypyrrole
Sabriye Per?in Ozkorucuklu,Yücel Sahin,Güleren Alsancak
Sensors , 2008, DOI: 10.3390/s8128463
Abstract: In this work, preparation of a molecularly imprinted polymer (MIP) film and its recognition properties for sulfamethoxazolewere investigated. The overoxidized polypyrrole (OPPy) film was prepared by the cyclic voltammetric deposition of pyrrole (Py) in the presence of supporting electrolyte (tetrabutylammonium perchlorate-TBAP) with and without a template molecule (sulfamethoxazole) on a pencil graphite electrode (PGE). The voltammetric behaviour of sulfamethoxazole on imprinted and non-imprinted (NIP) films was investigated by differential pulse voltammetry (DPV) in Britton-Robinson (BR) buffer solutions prepared in different ratio of acetonitrile-water binary mixture, between the pH 1.5 and 7.0. The effect of the acetonitrile-water ratio and pH, monomer and template concentrations, electropolymerization cycles on the performance of the MIP electrode was investigated and optimized. The MIP electrode exhibited the best reproducibility and highest sensitivity. The results showed that changing acetonitrile-water ratio and pH of BR buffer solution changes the oxidation peak current values. The highest anodic signal of sulfamethoxazole was obtained in BR buffer solution prepared in 50% (v/v) acetonitrile-water at pH 2.5. The calibration curve for sulfamethoxazole at MIP electrode has linear region for a concentration range of 25.10-3 to 0.75 mM (R2=0.9993). The detection limit of sulfamethoxazole was found as 3.59.10-4 mM (S/N=3). The same method was also applied to determination of sulfamethoxazole in commercial pharmaceutical samples. Method precision (RSD<1%) and recoveries (>87%) were satisfactory. The proposed method is simple and quick. The polypyrrole (PPy) electrodes have low response time, good mechanical stability and are disposable simple to construct.
An uncommon food intoxication treated in intensive care: botulism
Dilek Altun,Zafer ?ukorova,Gülay Eren,Yücel Polat
Medical Journal of Bakirk?y , 2010,
Abstract: Botulism is a rare neuroparalytic disease caused by a neurotoxin produced by the spore-producing bacterium Clostridium botulinum, an obligate anaerobe bacteria is found commonly in the environment. This toxin binds to the receptors of the axon membrane of the motor neurons, preventing the release of acetylcholine in the neuromuscular junction, causing accid paralysis. First findings are diplopia and nistagmus; resulting from the weakness of small extraokuler muscles. Bulber paralysis, respiratuary paralysis, cardiac arrest and at the end death can be seen. Treatment includes meticulous intensive care that includes mechanical ventilation, if necessary, and administration of antitoxin. Here, we reported a 21 years old a male patient with the diagnosis of botulinum intoxication, successfully treated in our intensive care unit.
A Life-threatening Complication of Deep Venous Thrombosis; Phlegmesia Cerulea Dolens
?mer Kaya,Neslihan Yücel,Gazi Gülba?,Hilal Ermi?
Akademik Acil T?p Olgu Sunumlar? Dergisi (AKATOS) , 2013,
Abstract: Phlegmasia cerulea dolens is a rare condition caused by complete venous occlusion and often results in tissue necrosis, limb amputation, or death. In this study, a 51 year old female presenting at our emergency department with leg edema, leg pain and cyanosis and was diagnosed with phlegmesia cerulea dolens, which is a life-threatening complication of deep venous thrombosis. Prompt diagnosis and treatment initiation are important to prevent pulmonary emboli, gangrene, amputation, and, ultimately, death.
Major issues of educational reform in China and Russian Federation in the last decades of 20th century
Gülsün Atanur Baskan,Yücel Erduran
Cypriot Journal of Educational Sciences , 2009,
Abstract: This paper aimed at analyzing the major issues on the agenda of the educational reform in China and Russian federation in thelast decades with special focus on administration and finance of education systems, by reviewing major articles, journals, policydocuments and reports published by the scholars, governmental, non-governmental, national and international organizations.The findings of the paper pointed out that the political and economic backgrounds of these countries were similar but the waysthey followed for reforming education were quite different because of the political and economic situations affecting educationsystems.
Task-Related Deactivation and Functional Connectivity of the Subgenual Cingulate Cortex in Major Depressive Disorder
Christopher G. Davey,Murat Yücel,Ben J. Harrison
Frontiers in Psychiatry , 2012, DOI: 10.3389/fpsyt.2012.00014
Abstract: Background: Major depressive disorder is associated with functional alterations in activity and resting-state connectivity of the extended medial frontal network. In this study we aimed to examine how task-related medial network activity and connectivity were affected in depression. Methods: 18 patients with major depressive disorder, aged 15- to 24-years-old, were matched with 19 healthy control participants. We characterized task-related activations and deactivations while participants engaged with an executive-control task (the multi-source interference task, MSIT). We used a psycho-physiological interactions approach to examine functional connectivity changes with subgenual anterior cingulate cortex. Voxel-wise statistical maps for each analysis were compared between the patient and control groups. Results: There were no differences between groups in their behavioral performances on the MSIT task, and nor in patterns of activation and deactivation. Assessment of functional connectivity with the subgenual cingulate showed that depressed patients did not demonstrate the same reduction in functional connectivity with the ventral striatum during task performance, but that they showed greater reduction in functional connectivity with adjacent ventromedial frontal cortex. The magnitude of this latter connectivity change predicted the relative activation of task-relevant executive-control regions in depressed patients. Conclusion: The study reinforces the importance of the subgenual cingulate cortex for depression, and demonstrates how dysfunctional connectivity with ventral brain regions might influence executive–attentional processes.
Deep Neck Infections: Results of 50 Cases
?a?l?, S.,Yüce, ?.,Güney, E.
Erciyes Medical Journal , 2006,
Abstract: Objectives: The purpose of this study was to present our clinical outcome on deep neck infections.Material and Methods: A retrospective chart review of 50 patients with deep neck infection, presenting between 1998 and 2005, was evaluated. Thirty four of 50 patients were male and 16 were female, with an age ranging between 1 to 70 years (mean 30.7 yrs). The findings of physical examinations, laboratory tests and radiologic and microbiologic studies were evaluated.Results: Sixteen of the 50 patients were diagnosed with peritonsillar abscesses. Other deep neck infections included parapharyngeal abscess (n=12), submandibular abscess (n=8), parotid abscess (n=5), retropharyngeal abscess (n=4), submental abscess (n=3) and Ludwig’s angina (n=2). Staphylococcus Aereus is the most common etiologic agent. The length of hospitalization period ranged from 2 to 24 days (mean 9 days). Forty-one patients of the 50 patiens required surgery, including open drainage in 36 patients, repeat needle aspiration in 6 patients and closed drainage in 3 patients. Two patients who acquired life-threatening complications, upper-airway obstruction and tracheotomy was performed. One patient with septic shock died and the mortality rate was 2% in our series.Conclusions: Most deep neck infections still remain as an important problem despite improvement in diagnosis and treatment.
Estimation of cross sections for molecule-cluster interactions by using artificial neural networks
B?yükata, Mustafa;Ko?yigit, Yücel;Güven?, Ziya B.;
Brazilian Journal of Physics , 2006, DOI: 10.1590/S0103-97332006000500027
Abstract: the cross sections of d2(v,j)+nin(t), n = 19 and 20, collision systems have been estimated by using artificial neural networks (anns). for training, previously determined cross section values via molecular dynamics simulation have been used. the performance of the anns for predicting any quantities in molecule-cluster interaction has been investigated. effects of the temperature of the clusters and the rovibrational states of the molecule are analyzed. the results are in good agreement with previous studies.
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