Altıntaş, F. | Uluçay, Ç.ğ.A.
Book Part | 2012 | Sports Injuries: Prevention, Diagnosis, Treatment, and Rehabilitation , pp.1065 - 1070
Deep vein thrombosis (DVT) can be seen in almost all races and age groups. Although many of the risk factors have been identified and several agents are currently used in its management and prevention, still it is not possible to predict accurately its development, symptoms, and progression to pulmonary embolism (PE) in a particular setting. Every year, at least 100,000 individuals die of DVT and PE in the USA. DVT is a complication usually occurring after hip fractures of the elderly or surgery for total joint replacement or spinal stenosis and mostly affecting elderly and bedridden patients. But, the frequency of DVT is quite high . . . among athletes and professional sport players. In general, DVT risk is 85% greater among athletes when compared to normal population due to the specific risk factors of sports. DVT and PE may be seen in athletes actively taking part in sportive activities, traveling, exposing to sportive trauma, or undergoing surgery for any reason, even at a relatively young age. In this chapter, the risk factors, diagnosis, prevention, and treatment of DVT and PE in athletes are discussed. © Springer-Verlag Berlin Heidelberg 2012 Daha fazlası Daha az
Conference Object | 2012 | Annual International Conference of the American Society for Engineering Management 2012, ASEM 2012 - Agile Management: Embracing Change and Uncertainty in Engineering Management , pp.666 - 669
High quality suppliers are necessary for the success of any organization. To guarantee good quality products from suppliers, it is necessary to optimize the process parameters immediately when deviations of the part quality, that is required by the customer, have been observed. Optimization of process parameters are only possible when an experienced process operator adjusts the parameters of the process manually. Although statistical process control (SPC) enable the quality of conformance to be monitored and special causes of process variability to be identified, it is not well applied in some enterprises due to fact that operators . . .cannot determine the 'out-of-control' position of the process, and the root causes of the quality problems with the limited knowledge they have. Therefore, the presented approach develops a system which combines dynamic control chart with the expert knowledge library. The system is carried out in two steps: the first step, a quality controller checks the product quality according to the reference values, when the process is going to be out of control, the system will give a warning to remind operators to take action exactly and keep the process in normal; in the second step, the system will give the related information and valuable suggestions to operator and help them to take correct action to keep the process in control. Copyright, American Society for Engineering Management, 2012 Daha fazlası Daha az
Soylev, TA | Ozturan, T
Conference Object | 2012 | 7TH ASIAN SYMPOSIUM ON POLYMERS IN CONCRETE , pp.737 - 744
Fibers do not provide significant increase in the strength of concrete at low fiber volumes commonly used in practice. The main benefits of fibers result from the control of the width of cracks in concrete. Polypropylene fiber is one of the most popular polymer fibers used in concrete, which has been shown to be effective in controlling the plastic shrinkage at the content of approximately 0.1% by volume. However, as polypropylene fibers are low modulus fibers and used at such low contents, it is difficult to expect an improvement in the crack control of hardened concrete in theory. In the present study, the effect of a multi-filame . . .nt polypropylene fiber on the resistance of concrete to surface scaling and freeze-thaw attack is investigated. Polypropylene fiber reinforced concrete was also tested under flexural load. Two different water/cement ratios were used for concrete production. The results indicated that polypropylene fibers can be beneficial in the control of micro-cracking induced by freeze-thaw cycling and surface scaling. The development of cracks under flexural load was not affected significantly by the presence of the polypropylene fibers Daha fazlası Daha az
M.M. Bilgic | K. Yegin | T. Turkkan | M. Sengiz
Conference Object | 2012 | IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) , pp.737 - 744
Aperture coupled phased array antenna design at Ku band is introduced. The array spans entire Receive Band of Ku band (10.8 GHz - 12.75 GHz) and has a gain greater than 24.5 dBi with approximately 330×70×25 mm (LxWxH) dimensions. Low loss waveguide-microstrip type hybrid feed network is also designed and simulation results are presented. Aperture efficiency greater than 70% is achieved. © 2012 IEEE.
Özdurak, C. | Ulusoy, V.
Article | 2012 | European Journal of Economics, Finance and Administrative Sciences ( 49 ) , pp.118 - 125
The aim of this paper is to analyse the different behaviors of ISE 100 Price Index, ISE Food&Beverages Sector Index, ISE Bank Sector Index and Ülker Bisküvi stock focusing on the outperformance of ISE Food&Beverages Sector Index and Ülker Bisküvi against the markets after 2008 global financial crisis. We used GARCH models to understand the bahvior of the indices and Ülker Bisküvi stock returns before and after the global financial crisis which we concluded that the outperformance of Ülker is related with its business restructuring events and dividend payment announces rater than global indicator while indices, especially Bank Sector . . . Index, are much more related with global financial market developments. © EuroJournals, Inc. 2012 Daha fazlası Daha az
Ozturk-Isik, E. | Pirzkall, A. | Lamborn, K.R. | Cha, S. | Chang, S.M. | Nelson, S.J.
Article | 2012 | Translational Oncology5 ( 1 ) , pp.10 - 18
The spatial heterogeneity in magnetic resonance (MR) metabolic and diffusion parameters and their relationship were studied for patients with treatment-naive grade 3 gliomas. MR data were evaluated from 51 patients with newly diagnosed grade 3 gliomas. Anatomic, diffusion, and metabolic imaging data were considered. Variations in metabolite levels, apparent diffusion coefficient (ADC), and fractional anisotropy (FA) were evaluated in regions of gadolinium enhancement and T2 hyperintensity as well as regions with abnormal metabolic signatures. Contrast enhancement was present in only 21 of the 51 patients. When present, the enhancing . . . component of the lesion had higher choline-to-N-acetylaspartate index (CNI), higher choline, lower N-acetylaspartate, similar creatine, similar ADC and FA, and higher lactate/lipid than the nonenhancing lesion. Regions with CNI ? 4 had higher choline, lower N-acetylaspartate, higher lactate/lipid, higher ADC, and lower FA than normal-appearing white matter and regions with intermediate CNI values. For lesions that exhibited gadolinium enhancement, the metabolite levels and diffusion parameters in the region of enhancement were consistent with it corresponding to the most abnormal portion of the tumor. For nonenhancing lesions, areas with CNI ? 4 were the most abnormal in metabolic and diffusion parameters. This suggests that the region with the highest CNI might provide a good target for biopsies for nonenhancing lesions to obtain a representative histologic diagnosis of its degree of malignancy. Metabolic and diffusion parameter levels may be of interest not only for directing tissue sampling but also for defining the targets for focal therapy and assessing response to therapy. © 2012 Neoplasia Press, Inc. All rights reserved Daha fazlası Daha az
Conference Object | 2012 | EDULEARN12: 4TH INTERNATIONAL CONFERENCE ON EDUCATION AND NEW LEARNING TECHNOLOGIES , pp.5022 - 5039
The effectiveness of instructional design for developing listening comprehension in English as a second language (L2) is of prime concern to language teachers. Several technology based instructional designs with the emphasis on distinct presentation of listening tasks are highlighted in literature. However, there are a lack of empirical studies to clarify issues concerning modality differences for foreign language (FL) learners and their effect on comprehension. Moreover, learners' listening performance may be affected by the modality in which the tasks are presented (extraneous cognitive load) or the amount of cognitive resources t . . .hat learners invest in schema construction and automation (germane cognitive load). Based on cognitive load theory, this study examines whether the subjects' listening performance varied when the instructional formats of listening tasks were presented in three different modalities. Listening with auditory materials only (LO), narrow listening (NL), listening with a full written script (LFS) were employed to evaluate the subjects' listening performance. This study employs a mixed method design utilizing qualitative and quantitative tools including semi-structured interviews with test takers to assess the best facilitating modality for listening comprehension as well as post test scores to determine student performance. Two hundred and eight, intermediate and advanced level pre-service teacher candidates of English whose L1 was Turkish completed four tests through different representations that required them to listen to dialogues and to complete a number of multiple choice comprehension questions Daha fazlası Daha az
Tüzün Aksu, D. | Ocak, Z.
Article | 2012 | Journal of Urban Planning and Development138 ( 2 ) , pp.143 - 152
In this case study, a methodology to determine the locations of municipal centers for eight newly established counties within the Istanbul Metropolitan Municipality is presented. Both discrete and planar location models to solve this multicriteria problem is employed. A municipal center is the main facility in a county that offers residents a variety of municipal services, including issuance of licenses and permits, tax collection, and welfare services. Because many of these services require the individuals to make additional trips to other government agencies, the traffic generated between the municipal center and other government . . .agencies should be taken into account when the municipal center is located. An approach to quantify this additional traffic and locate the center accordingly is proposed. An approach is also demonstrated by implementing it in one of the newly established counties in Istanbul, namely Ataşehir. The municipality administration has approved the methodology for determining the locations of all newly established counties and other government buildings in Istanbul. © 2012 American Society of Civil Engineers Daha fazlası Daha az
Article | 2012 | Egitim Arastirmalari - Eurasian Journal of Educational Research ( 48 ) , pp.39 - 58
Problem Statement: This paper reports on a study of whether student teachers in an English as a Foreign Language (EFL) teacher education course perceive themselves to have learned from teacher education via early development of reflective practice. Purpose of the Study: The study aimed to demonstrate that by employing methodologies characteristic of teacher education, it is possible to inculcate reflective practices during teacher education and not only in field experience during pre-service training. Methods: Twenty-seven student teachers (all female) initially participated in the study, though numbers dropped to 14 and finally eig . . .ht over the research period. Qualitative data were gathered via reflective essays and interviews. The data were investigated, first, for evidence that student teachers were learning to teach at an early stage via being reflective, and, second, for evidence of a causal relationship between the design of the courses and the capacity of the student teachers to become reflective learners. Results and Discussion: The data gathered shows that the design of the methodology and practicum courses enabled the student teachers to learn from teacher practices by adopting a reflective approach, and that the gap described in the literature as one between theories and practice can be overcome by using lesson plans as a springboard for adoption of critical reflection. Conclusions and Recommendations: As the student teachers move from microteaching to practicum and from there to the teaching profession, they adapt to the new conditions, but still favour the practices initially acquired during their microteaching experiences. They look forward to being given the opportunity to use their full potential, skills, abilities and knowledge to fulfil the educational needs of society and the new generation, and to creating an appealing learning climate by critically reflecting on the theories that underpin their teaching practices Daha fazlası Daha az
Inci, G. | Sorgüven, E.
Article | 2012 | ASAIO Journal58 ( 4 ) , pp.373 - 381
Left ventricular assist devices (LVADs), which pump blood from the left ventricle to the aorta are an important therapy option for patients with end-stage cardiovascular diseases. Recent publications show that even with optimized LVADs fatal complications can occur because of the blood deformations around the inflow cannula or through the LVAD outlet graft-aorta anastomosis. This study investigates the effects of the anastomosis geometry on the flow through the aorta, on the pressure and wall shear stress (WSS) distributions on the aortic wall and on the total entropy generation in the anastomosis region. Anastomosis geometry is def . . .ined with two angles, one on the coronal plane and the other on the transversal plane. Turbulent flow simulations are performed for each geometry. Results indicate that 3% to 5% of the work given by the LVAD is dissipated because of the viscous losses in the anastomosis region. The entropy generation, as well as the maximum WSS, increases as the inclination angle decreases. Some portion of the blood streaming out of the LVAD conduit flows toward the aortic valve; therefore the reverse-flow region extends up to the aortic valve in some cases, which may be one of the causes of aortic-valve dysfunction. Results of this study provide insight on the importance of the anastomosis geometry on the hemodynamics in the aorta and downstream the aortic valve, stresses on the aortic wall, and viscous losses. Copyright © 2012 by the American Society for Artificial Internal Organs Daha fazlası Daha az
Ben-Nun Bloom, P. | Arikan, G.
Article | 2012 | Political Behavior34 ( 2 ) , pp.249 - 276
Different components of the religious experience have differing effects on attitudes towards democracy. Using heteroskedastic maximum likelihood models and data from the fourth wave of the World Values Survey for 45 democratic countries, we show that as a personal belief system, religiosity contrasts with democratic principles, generating opposition to democracy while increasing ambivalence towards democratic principles among religious people. Nevertheless, at the group level, religion also serves as a social institution which increases the homogeneity of one's social network, leading to lower ambivalence, and makes for an active mi . . .nority group which benefits from the democratic framework, consequently increasing support overall for a democratic regime. This double-edged sword effect explains the mixed results currently found in the literature on religiosity and democracy, and clearly illustrates the multidimensionality of religiosity. © 2011 Springer Science+Business Media, LLC Daha fazlası Daha az
Özçakir-Tomruk, C. | Arslan, A.
Article | 2012 | Australian Dental Journal57 ( 2 ) , pp.231 - 235
Although fracture of the tooth during surgical removal is common, mandibular fracture during lower third molar removal is an unusual and major complication. Possible aetiologies are age, gender, the position of the tooth, uncontrolled excessive force applied, insufficient surgical experience and improper instrumentation. Symptoms can vary widely and treatment options range from prescription of a soft diet to surgical treatment by open reduction and internal fixation. We present two cases of the treatment and follow-up of fracture of the angle region of the mandible during removal. © 2012 Australian Dental Association.