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Search Results: 1 - 10 of 392 matches for " Uygar Cagdas;Celik "
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High admission levels of γ-glutamyltransferase predict poor myocardial perfusion after primary percutaneous intervention
Yuksel, Uygar Cagdas;Celik, Turgay;Celik, Murat;Bugan, Baris;Iyisoy, Atila;Yaman, Halil;
Clinics , 2011, DOI: 10.1590/S1807-59322011001000010
Abstract: objective: this retrospective study aimed to investigate the relationship between admission levels of serum y-glutamyltransferase and poor myocardial perfusion after primary percutaneous coronary intervention in patients with acute myocardial infarction. introduction: reperfusion injury caused by free radical release and increased oxidative stress is responsible for the pathophysiology of the no-reflow phenomenon in patients with acute myocardial infarction undergoing primary percutaneous coronary intervention. serum ?-glutamyltransferase is an established marker of increased oxidative stress. methods: the study population consisted of 80 patients (64 men and 16 women, mean age = 67.5 + 6.6 years) with thrombolysis in myocardial infarction 0/1 flow pre-procedurally. the patients were divided into two groups according to thrombolysis in myocardial perfusion grades that were assessed immediately following primary percutaneous coronary intervention. the two groups (group 1 and group 2) each consisted of 40 patients with thrombolysis in myocardial perfusion grades 0-1 and thrombolysis in myocardial perfusion grades 2-3, respectively. results: admission pain to balloon time, ?-glutamyltransferase and creatine kinase-mb isoenzyme levels of group 1 patients were significantly higher than those of group 2 patients. pain to balloon time, ?-glutamyltransferase, peak creatine kinase-mb isoenzyme, low left ventricular ejection fraction and poor pre-procedural thrombolysis in myocardial infarction grade were significantly associated with poor myocardial perfusion by univariate analysis. however, only pain to balloon time and ?-glutamyltransferase levels showed a significant independent association with poor myocardial perfusion by backward logistic regression analysis. adjusted odds ratios were calculated as 4.92 for pain to balloon time and 1.13 for ?-glutamyltransferase. conclusion: high admission ?-glutamyltransferase levels are associated with poor myocardial perfusion in pa
Participatory Ecosystem Management Planning at Tuzla Lake (Turkey) Using Fuzzy Cognitive Mapping
Filiz Dadaser Celik,Uygar Ozesmi,Asuman Akdogan
Quantitative Biology , 2005,
Abstract: A participatory environmental management plan was prepared for Tuzla Lake, Turkey. Fuzzy cognitive mapping approach was used to obtain stakeholder views and desires. Cognitive maps were prepared with 44 stakeholders (villagers, local decisionmakers, government and non-government organization (NGO) officials). Graph theory indices, statistical methods and "What-if" simulations were used in the analysis. The most mentioned variables were livelihood, agriculture and animal husbandry. The most central variable was agriculture for local people (villagers and local decisionmakers) and education for NGO & Government officials. All the stakeholders agreed that livelihood was increased by agriculture and animal husbandry while hunting decreased birds and wildlife. Although local people focused on their livelihoods, NGO & Government officials focused on conservation of Tuzla Lake and education of local people. Stakeholders indicated that the conservation status of Tuzla Lake should be strengthened to conserve the ecosystem and biodiversity, which may be negatively impacted by agriculture and irrigation. Stakeholders mentioned salt extraction, ecotourism, and carpet weaving as alternative economic activities. Cognitive mapping provided an effective tool for the inclusion of the stakeholders' views and ensured initial participation in environmental planning and policy making.
Giant Choroid Plexus Calcification and Idiopathic Intracranial Hypertension: a Case Report
Uygar Utku
Erciyes Medical Journal , 2012,
Abstract: While small calcifications of the choroid plexus are frequent, large choroid plexus calcifications are very rare. A 25-year-old woman was admitted due to headache. Except for bilaterally papillary oedema, her neurological examination was normal. The parenchyma and ventricles were normal on computed brain tomography. However, choroid plexus calcification was seen and was more extensive than usual (2x2x2.5 cm). The patient had a cerebrospinal fluid pressure of 450 mmH2O and was diagnosed with idiopathic intracranial hypertension (previously known as pseudotumor cerebri). While further studies are needed, an increase in the size of the choroid plexus may be associated with intracranial hypertension.
Fuzzy Cognitive Maps Of Local People Impacted By Dam Construction: Their Demands Regarding Resettlement
Uygar Ozesmi
Quantitative Biology , 2006,
Abstract: Fuzzy cognitive mapping was used to understand the wants and desires of local people before resettlement. Variables that the affected people think will increase their welfare during and after dam construction were determined. Simulations were done with their cumulative social cognitive map to determine which policy options would most increase their welfare. The construction of roads, job opportunities, advance payment of condemnation value, and schools are central variables that had the most effect on increasing people's income and welfare. The synergistic effects of variables demonstrated that the implementation of different policies not only add cumulatively to the people's welfare but also have an increased effect.
Perceptions of Complex Systems Are Governed by Power Laws
Uygar Ozesmi
Quantitative Biology , 2006,
Abstract: Many networks in natural and human-made systems exhibit scale-free properties and are small worlds. Now we show that people's understanding of complex systems in their cognitive maps also follow a scale-free topology. People focus on a few attributes, relating these with many other things in the system. Many more attributes have very few connections. People use relatively short explanations to describe events; their cognitive map is a small world with less than six degrees of separation. These findings may help us to better understand people's perceptions, especially when it comes to decision-making, conflict resolution, politics and management.
Ecosystems in the Mind: Fuzzy Cognitive Maps of the Kizilirmak Delta Wetlands in Turkey
Uygar Ozesmi
Quantitative Biology , 2006,
Abstract: Sustainability of ecosystems & ecosystem management are increasingly accepted societal goals. Can conservation programs be improved by incorporating local people's understanding of ecosystems? The Kizilirmak Delta is one of Turkey's most important wetland complexes. It is also one of the most productive agricultural deltas in Turkey. We obtained 31 cognitive models of the social & ecological system. These models were converted to adjacency matrices, analyzed using graph theoretical methods, & augmented into social cognitive maps. Causal "What-if" scenarios were run to determine the trajectory of the ecosystem based on models defined by stakeholders. Villagers had significantly larger numbers of variables, more complex maps, a broader understanding of all the variables that affect the Kizilirmak Delta, & mentioned more variables that control the ecosystem than did NGO and government officials. Villagers adapting to changing ecological & social conditions actively changed & challenged conditions through the political process. Villagers were faced with many important forcing functions that they could not control. Most of the variables defined by villagers were related to agriculture and animal husbandry. Conservation policies & ecosystem management must encompass larger environmental issues & villagers' cognitive maps must be reconciled with that of NGOs & government officials. Cognitive maps can serve as a basis for discussion when policies & management options are formulated. A villager-centered cognitive mapping approach is not only necessary because villagers resist conservation projects, or because top down projects that do not take local knowledge systems into account fail, but because it is the ethical and responsible way of doing ecosystem management.
The Contribution of Supervisors to Doctoral Students in Doctoral Education: A Qualitative Study  [PDF]
Kazim Celik
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.41002
Abstract: In this study, it was aimed to analyze supervisor-student relationship in the doctoral education based on views of students. For this reason, research assistants having completed doctoral education and got PhD title were asked what the contributions of their supervisors were and what kind of problems they experienced in doctoral education. Considering academic advising process, it was intended to shed a light on both formal and information sides of supervisor-student relationship. As a design of the study, qualitative case study method was used. In the light of the aim of the study, “semi-structured data collection form”, one of the qualitative data collection tools, was used to collect the data. The data gained from 19 research assistants having completed their PhD degrees in the past 36 months were analyzed with content analysis. The past/ongoing contribution of supervisors to their students’ education were classified under the themes of contribution to their personal development, contribution to academic development, contribution to professional development, and contribution to intellectual development. The students, being in intimate relationship with their supervisors, emphasize positive contributions of supervisors. However, the students, not being in an intimate relationship, underline the negative characteristics of their supervisors. Few of the participants utter ongoing contribution of supervisors. This study analyzes dimensions for the contribution of supervisors to students in doctoral education, and the experiences of students in these dimensions. In this regard, academicians who are supervisors or will be supervisors are expected to benefit from the study.
The Feature-Based a New Object Coding Approach for Prismatic Parts at the Part Modeling  [PDF]
Ismet Celik, Ali Unuvar
Modeling and Numerical Simulation of Material Science (MNSMS) , 2013, DOI: 10.4236/mnsms.2013.34018

Use of features in order to achieve the integration of design and manufacture has been considered to be a key factor recent years. Features such as manufacturing properties form the workpiece. Features are structured systematically through object oriented modeling. This article explains an object coding method developed for prismatic workpieces and the use of that method in process planning. Features have been determined and modeled as objects. Features have been coded according to their types and locations on the workpiece in this given method. Feature codings have been seen to be very advantageous in process planning.

Effect of Lunar Synchronization on the Reproduction Time of Discus Fish (Symphysodon sp.) Under Controlled Aquarium Conditions
Pinar Celik,Ihsan Celik
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.890.893
Abstract: The reproduction times of the discus fish were observed for 2 years under fully-controlled production conditions. The position of the moon was also recorded on the spawning day of the fish at a light photoperiod of 14 h and a dark photoperiod of 10 h with water quality parameters of 27-30°C, pH 4.5-6.5 and conductivity of 80-200 μS. Of 102 observed reproductions, 28 occurred at the first quarter of the moon, 28 at full moon, 40 at the last quarter and 6 at new moon. Accordingly, it has been concluded that the discus fish display a reproduction behavior according to the lunar cycle even indoors, although they do not receive direct moonlight.
Simultaneous bilateral spontaneous pneumothorax : A case report
Celik Burcin,Celik Hale
Annals of Saudi Medicine , 2007,
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