AXSIS (Yeditepe Üniversitesi)
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Vocational social support perceptions of teachers of working in public high schools (Example of Ümraniye town)
No full text:nullThe Yeditepe University Open Access System is a compilation of national and international indexed publications for the institutional archive of scientific publications prepared by Yeditepe University students (graduate, doctoral, and/or equivalent). Copyright and rights of use may belong to the authors and/or Yeditepe University.YÖK id number : 355903Turkish: Araştırmanın amacı, İstanbul İli Ümraniye ilçesinde farklı lise türlerinde çalışan öğretmenlerin mesleki sosyal destek düzeylerinin saptanarak, cinsiyet, medeni durum, yaş, mezuniyet düzeyi, mezun olunan okul türü, branş, mesleki kıdem, okuldaki çalışma süresi, idarecilik deneyimi olup/ olmama, mesleki sosyal açıdan desteğe ihtiyaç olduğunu düşünüp/düşünmeme ve çalıştıkları lise türüne göre algıladıkları mesleki sosyal destek düzeylerinin farklılaşıp farklılaşmadığını incelemektir. Bu doğrultuda mesleki sosyal destek düzeylerinin yönetim desteği, meslektaş desteği, öğrenci desteği, aile desteği ve etkili öğretim desteği düzeyini belirlemektir. Araştırmanın örneklemini genel liselerde çalışan 79, Anadolu liselerinde çalışan 104, Meslek liselerinde çalışan 216 ve Çok programlı lisede çalışan 24 öğretmen olmak üzere toplam 423 öğretmen oluşturmaktadır. Araştırmanın bağımsız değişkenleri hakkında veri toplamak amacıyla araştırmacı tarafından geliştirilen anket ile cinsiyet, medeni durum, yaş, mezuniyet düzeyi, mezun olunan okul türü, branş, mesleki kıdem, okuldaki çalışma süresi, idarecilik deneyimi olup/ olmama, mesleki sosyal açıdan desteğe ihtiyaç olduğunu düşünüp/düşünmeme ve çalıştıkları lise türü ile ilgili bilgiler toplanmıştır. Araştırmada, mevcut durumu öğrenmek için öğretmenlerin mesleklerini yerine getirirken aldıkları mesleki desteğe ilişkin algılarını belirlemek amacıyla Öğretmen Mesleki Sosyal Destek Ölçeği' uygulanmıştır. Öğretmen Mesleki Sosyal Destek Ölçeği 44 maddeden ve 5 alt ölçekten oluşmaktadır (Kaner, 2007). Farklı lise türlerinde çalışan öğretmenlerin algıladıkları mesleki sosyal destek düzeylerinin belirlendiği bu araştırma bulgularına göre öğretmenlerin sırası ile yönetim desteği, meslektaş desteği, öğrenci desteği, aile desteği ve etkili öğretim desteği boyutlarında puanlandığı görülmektedir. Araştırma sonuçlarına göre öğretmenlerin algıladıkları mesleki sosyal destek düzeyleri; cinsiyet, yaş, medeni durum, meslekteki çalışma süresi, mezuniyet düzeyi ve okuldaki çalışma süresi değişkenlerine göre istatistiksel olarak anlamlı bir farklılık yoktur. Bununla birlikte, öğretmenlerin mesleki sosyal destek düzeyleri; mezun olunan okul türü, branş, idarecilik deneyimi olup olmama, mesleki sosyal açıdan desteğe ihtiyaç duyup/duymama ve çalışılan lise türü değişkenlerine göre anlamlı farklılık göstermiştir. Elde edilen bulgular ilgili alan yazın doğrultusunda tartışılarak ileri araştırmalara ve uygulamacılara yönelik önerilerde bulunulmuştur. Anahtar kelimeler: Sosyal Destek, Lise Türü, ÖğretmenThe aim of this research is to analyse the perceived vocation social support levels of teachers working in public high schools of İstanbul in terms of some variables, the type of special education school, gender, education level, age, gender, length of service, marriage, and to give suggestions from this point of view. Data collecting process has two different parts: First part is based on personal knowledge about the teachers. Second part consists Kaner vocation social support Survey. The study group consisted of 423 participants attending National Ministry of Education high schools located in Istanbul during the academic year of 2012-2013. The data obtained were analyzed using SPSS statistical significance at the 0.05 level were examined. In order to examine the differences between the mean social support scores of the study groups, parametric and nonparametric tests were used for statistical analysis. After Normal distribution search resault T-test or Mann Whitney U-test ,Variance Analysis (ANOVA) or Kruskal Wallis H-test were used to determine If these were related to the variables.Frequency and percentage calculations were made in order to determine the distributions related to the characteristics of the study group. In the evaluation of research data, t-test Analysis and Pearson Product-Moment Correlation and Coefficient Analysis techniques were used. Following results were obtained from the study, according to the teachers' perceptions, there is no significant differences according to the education level, age, gender and length of service. On the other hand, according to the teachers' perceptions, there are significant differences according to the graduated school type, administration experience and need of social support. The findings of this study were discussed and suggestions for practice were provided. Key Words: Social Support, Type of High School, Teacher
A crack driving force criterion for the prediction of interface crack kinking in thin-film composites
No full textInterfacial fracture mechanics is a relatively new field with many issues that have not yet been resolved. One such issue is the ability to accurately predict whether or not a bimaterial interface crack will propagate along the interface, kink into the film or substrate, or not propagate at all. In the present work, a crack driving force criterion is proposed in order to predict the level of applied load required to propagate a pre-existing interface crack in thin-film composites subjected to thermal loading. A primary objective is to predict the critical length of an interface crack at which it kinks into the substrate. The phenomenon of interface cracks kinking into the substrate is frequently observed when the film is under tensile loading and the substrate is brittle. An interface crack that advances into the substrate eventually propagates parallel to the interface at a certain steady-state depth. Ultimately, the portion of the structure that remains above the crack may spall, resulting in catastrophic failure. The crack driving force criterion is applied to a two-dimensional, plane strain interface crack problem, and the results compare favorably with available experimental results
Composite osteocutaneous groin flap combined with neurovascular island flap for thumb reconstruction
No full textThree amputated thumbs were reconstructed with a composite osteocutaneous groin flap and a neurovascular island flap. The average age at the time of surgery was 28 (range 25-35) years. The level of the amputation was distal to metacarpophalangeal joint in two cases and proximal in one case. The injury mechanism was avulsion in all cases. The postoperative follow-up periods ranged from 27 to 30 months. There were no cases of skin necrosis, bone resorption or infection. Radiographs and three-phase bone scans showed union of the iliac bone block and the stump without any resorption in all three patients. This surgical procedure is reliable and simple and the functional results are satisfying. We reserve this technique for the treatment of thumb amputations which cannot be replanted, particularly as it does not result in bone resorption.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive
Bone generation on PHBV matrices: An in vitro study
No full textBone formation was investigated in vitro by culturing rat marrow stromal osteoblasts in biodegradable, macroporous poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) matrices over a period of 60 days. Foams were prepared after solvent evaporation and solute leaching. PHBV solutions with different concentrations were prepared in chloroform: dichloromethane (1:2, v/v). In order to create a matrix with high porosity and uniform pore sizes, sieved sucrose crystals (300-500μm) were used. PHBV foams were treated with rf-oxygen plasma (100W 10min) to modify their surface chemistry and hydrophilicity with the aim of increasing the reattachment of osteoblasts. Osteoblasts were isolated from rat bone marrow and seeded onto PHBV foams. The cell density on and in the foams was determined with MTS assay. MTS results showed that osteoblasts proliferated on PHBV. Twenty-one days after seeding of incubation, growth of osteoblasts on matrices and initiation of mineralization were observed by confocal laser scanning microscopy. Increasing ALP and osteocalcin secretion during 60 days confirmed the osteoblastic phenotype of the derived stromal cells. SEM, histological evaluations and confocal laser scanning microscopy showed that osteoblasts could grow inside the matrices and lead to mineralization. Cells exhibited spindle-like morphology and had a diameter of 10-30μm. Based on these, it could confidently be stated that PHBV seems to be a promising polymeric matrix material for bone tissue engineering. © 2003 Elsevier Ltd. All rights reserved.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive
Türkiye’ de Biyomedikal Mühendisliği Lisans Programlarının Son Beş Yılı ve 2020 yılı için Öngörüler
No full textIn this study, the files published on OSYM web site that consist of the lists of Higher education degree programs accepting students via central placements are inspected for a five-year period starting from the year of 2010. Considering the Biomedical engineering programs, universities, quotas and the number of students placed were noted. Using the data noted, several tables and graphs providing valuable information were generated and interpreted. A number of predictions were made for the year of 2020. In both public and private universities, both the number of programs and quotas show increases in the last five year period. Total number of program vs. year and total number of quota vs. year data can be represented by linear curves with positive slopes. The number of students placed in state universities is increasing rapidly and continuously. The increase in the number of students placed in private universities is slower and has a tendency to decrease in the year of 2014. However, the total number of students placed tends to increase and this data can be fitted to a linear curve with a positive slope. The occupancy rate changes from 88 to 80 while it is 100 for public universities independent of years. The occupancy rate in private universities tends to decrease over the years. Considering the 2014 data, quotas provided by most public universities are quite higher than the ones provided by private universities. These high quotas in public universities are provided with secondary education services. The majority of the quotas in private universities are provided for 50 scholarships. The highest quota is provided in Istanbul by private universities. Another city where private universities provide all quotas is Ankara. In Izmir, two halves of the quota are provided by private and state universities. All of the quotas in other cities are provided by public universities. Predictions made for the year of 2020 show that the total quota of biomedical engineering will be 2554, the number of students to be placed will be 2055 and the number of programs will be 43. Private universities are estimated to have 34 occupancy rate. It should be noted that during calculation of this ratio, a 100 of average occupancy rate for the public universities have been considered. © 2014 IEEE.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive
Productivity and technical change in Malaysian banking: 1989-1998
No full textThis study examines the impact of deregulation and technological change on the productivity of Malaysian banks over the period 1989-1998. Malmquist indices constructed with nonparametric DEA techniques are decomposed into their pure efficiency, scale efficiency, and technological change components. Our findings indicate an erosion of banking productivity that masks divergent tendencies among its component elements. These are dominated by adverse effects of technological change, which are associated with a reduction in the labor intensity of banking activity. Consistent with the mixed findings reported in the literature, the present investigation suggests that regulatory reform and liberalization are not sufficient conditions for productivity improvement. © Springer 2005
Spectroscopic study of p-methoxy-styrene in aqueous media
No full textFlash spectroscopic study of p-methoxy-styrene (hereafter PMS) in water at room temperature gave first order photochemical reactions. In the first step an excited singlet S1 is created then S1→S0 transitions were recorded. The 1/e decay time of promt fluorescence of PMS in water at room temperature were measured by using flash photolysis technique, and the fluorescence decay time was found to be 19 ns. Due to the various quenching processes neither delayed fluorescences nor triplet-triplet emissions could be recorded.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive
Triplet-triplet absorption of salicylidene-p-toluidine in solution
No full textThe observation of triplet-triplet absorption of salicylidene-p-toluidine is complicated because of the possible colored isomer formation during the optical pumping. The short-lived (singlet-singlet) and long-lived (triplet-triplet) absorption spectra were recorded photographically by microsecond flash photolysis and nanosecond laser flash photolysis techniques. Salicylidene complexes were purified by repeated recrystallisation until further recrystallisation produced no further changes for x-ray diffraction pattern and, optical absorbtion and emission properties.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive
Isolation of moderately infectious Borrelia burgdorferi sensu stricto from attenuated cultures by using complement-mediated, antibody-dependent lysis selection technique in a mammalian tissue co-culture system
No full textWe investigated the association between complement resistance and phenotypes of pathogenicity of Borrelia burgdorferi sensu lato isolates cultivated in a LEW/N rat tibiotarsal joint-derived tissue feeder layer-supported co-culture system. Guinea pig complement and immune serum raised in LHS/Ss hamsters caused complete lysis of B. burgdorferi sensu stricto isolate 297, B. afzelii and B. garinii in Barbour-Stoenner-Kelly's medium; however, tissue co-cultured B. burgdorferi sensu stricto contained complement escape variants . The arthritogenicity and infectivity of these variants were tested in 3-week-old Syrian hamsters and in a vaccinated hamster model in which formalin-killed B. burgdorferi sensu stricto C-1-11 vaccinated animals develop severe arthritis after challenge with live, pathogenic, low-passage 297 isolate. Non-animal-passaged complement escape variants were infectious in both animal models as demonstrated by re-isolation from the infected animals and competitive PCR. IP injection of animal-passaged complement escape variants caused development of severe arthritis in vaccinated animals 5 weeks post-injection; animal passage of complement escape variants was necessary for isolation of arthritogenic spirochetes from high-passaged, non-arthritogenic, attenuated borrelia cultures. Complement escape variants synthesized outer surface protein E as demonstrated by SDS-PAGE and western blotting analyses. The complement-mediated selection technique in tissue co-culture provides a novel approach to the studies of Lyme disease, enables us to isolate pathogenically distinct borrelia populations from attenuated cultures and prepare a moderately infectious, non-pathogenic live vaccine against this illness. © 2003 Éditions scientifiques et médicales Elsevier SAS. All rights reserved.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive.2. Methods 2.1. Borrelia cultures Cloned isolate of B. burgdorferi sensu stricto 297 was obtained from Russell C. Johnson (Department of Microbiology, University of Minnesota, Minneapolis), B. burgdorferi sensu stricto C-1-11, B. garinii isolate LV4 and B. afzelii isolate BV1 were provided by Steve Lovrich (Gundersen Clinic, LaCrosse, WI). Borrelia were cultured in BSK-H medium (Sigma), or in LEW/N rat tibiotarsal joint-derived tissue co-culture system using ESG medium which contains Dulbecco’s modified Eagle’s medium (DMEM) in addition to components of BSK-H in modified quantities and fetal bovine serum (FBS) instead of rabbit serum (Table 1). Low-passaged B. burgdorferi (lBSK) were cultured twice and hBSK were maintained by weekly passages (400×) in BSK-H at 33 °C. Tissue co-cultured spirochetes were collected with a sterile rubber policeman from the feeder layer and enumerated by using a Petroff–Hauser chamber under a phase contrast microscope
Temporomandibular internal derangement: Correlation of MRI findings with clinical symptoms of pain and joint sounds in patients with bruxing behaviour
No full textObjectives: The aim of this study was to correlate magnetic resonance imaging (MRI) findings of effusion, disc displacement, condylar bony changes and disc form with clinical findings of pain and sounds in patients with bruxing and non-bruxing behaviour. Methods: Disc displacement was confirmed by MRI in 102 joints from 64 patients (total of 128 joints) with bruxing behaviour who were referred for clinically diagnosed internal derangements of the temporomandibular joint (TMJ). Sixty joints with internal derangement from 30 patients without bruxing behaviour served as a control group. The clinical inclusion criteria were pain in the pre-auricular area and muscles of mastication, limitation or deviation in mandibular range of motion, and TMJ sounds. Signs of bruxism were diagnosed clinically and were obtained from the patient's history given on their first visit. Pain was evaluated using a visual analogue scale. Results: Of the 102 joints in the study group with disc displacement, 53 (52) showed disc displacement with reduction and 49 (48) showed disc displacement without reduction. In the control group, 16 joints were classified as normal. Of the remaining 44 joints, 27 (61) had disc displacement with reduction and 17 (39) had unilateral disc displacement without reduction. Condylar bony changes were seen in 55 of the reducing joints in the study group and in 38 of the reducing joints in the control group, compared with 86 of the non-reducing joints in the study group and 24 of the non-reducing joints in the control group. There was a strong correlation between age and degenerative change in the study group. In the reducing joints, there was a significant difference in the prevalence of condylar bony changes between the study and control groups (P < 0.01). In non-reducing joints, 30 of painful joints in the study group and 59 of those in the control group showed a strong signal in the joint space on T2 weighted imaging. Statistically significant differences between the study and control groups were also found for disc form and the prevalence of effusion and disc displacement. Joint sounds were important in unilaterally affected joints in the study group. A statistically significant correlation was found between joint sounds and reducing joints (P < 0.05). Conclusion: It was demonstrated that a higher prevalence of condylar bony changes occurred in reducing joints in patients with bruxing behaviour.The Yeditepe University Open Access System is a compendium of indexed publications. Copyright and usage rights may be held by publishers and/or authors. The collection was established for the scientific publications prepared by Yeditepe University academicians and is to be found in the institutional archive.Disc displacement was confirmed by MRI in 102 joints from 64 patients (total of 128 joints) with bruxing behaviour who were referred for clinically diagnosed internal derangements of the temporomandibular joint (TMJ). Sixty joints with internal derangement from 30 patients without bruxing behaviour served as a control group. The clinical inclusion criteria were pain in the pre-auricular area and muscles of mastication, limitation or deviation in mandibular range of motion, and TMJ sounds. Signs of bruxism were diagnosed clinically and were obtained from the patient's history given on their first visit. Pain was evaluated using a visual analogue scale