904 research outputs found
An Analysis of the Education System in Turkey: Supervision Policies Between the Years 1980 – 2021
This article intends to delineate the policy of the supervision system, which is a sub-system of the Turkish education system, for the years 1980-2021, through policy analysis. A systematic literature review (SLR) analyzed the research findings of 44 studies. The findings of the study were categorized according to four main themes that Eranıl (2021) pinpointed as the critical periods in the history of the Turkish education system. Critical periods were classified as a post-coup period: (1980-1997), compulsory eight-year education period: (1997-2005), constructivist period: (2005-2012), 4 + 4 + 4 education system period: (2012 and later). The results of the research indicate that the supervision system in Turkey struggled with organizational structuring problems for more than 40 years. It is also revealed that the supervision system does not have a developed philosophy or applicable principles. Due to these issues raised pertaining to supervision processes, supervisor competencies and personnel are analyzed and discussed
The Effects of Material Properties on Building Performance
In recent earthquakes during the last two decades, severe damages have been occurred on
the existing buildings in Turkey. Destructive earthquakes revealed that the existing building
stock in urban regions is significantly vulnerable to seismic hazard. A large number of
residential buildings located in regions of high seismicity require performance evaluation
before the next big earthquake hits the region. In many earthquake resistant codes, several
procedures are proposed to determine the building performance. The investigations on the
damaged buildings show that material strengths are very important parameters on the building
performance. In this study, material strengths’ effects on the building performance were
investigated by using a nonlinear elastic analysis method
Strongly interacting one-dimensional Bose-Einstein condensates in harmonic traps
The properties of strongly interacting one dimensional boson condensates in harmonic trap potentials were studied. An equation describing the condensate wave function in the limit of very strong interactions between the bosons was obtained using a density functional type formalism. It was found that the two component system exhibits coexisting and segregated phases similar to the weakly interacting system
Evaluation of choroidal thickness in cases with age-related macular degeneration
AIM: To compare subfoveal choroidal thickness(SFCT)between cases with non-neovascular age-related macular degeneration(AMD)and neovascular AMD by optical coherence tomography(OCT)and to evaluate the contribution of choroidal thickness(CT)measurements to the understanding of pathogenesis of neovascularization in AMD.<p>METHODS: Fourty-eigth eyes of 24 patients who had neovascular AMD in one eye and non-neovascular AMD in the other eye were included in this retrospective, cross- sectional study as study group. Forty eyes of healthy,age and axial length matched individuals were selected as the control group. Eyes with drusen and/or pigmentary changes were included in the non-neovascular AMD subgroup. Eyes with subretinal or intraretinal fluid and/orlipid exudation due to the choroidal neovascularization were included in the neovascular AMD subgroup. OCT measurements were performed with RTVue 100-2(V 5.1, Optovue, Fremont, CA, USA)perpendicularly from the outer part of the hyperreflective line(retinal pigment epithelial layer)to the line corresponding to the choroido- scleral junction. Choroidal thickness was measured at 7 different points, 500μm intervals up to 1500μm temporal and nasal to the fovea in the study group and compared statistically between subgroups.<p>RESULTS: The mean age of patients was 72.4±8.97(60- 82)y. The mean age of healthy individuals was 71.2±8.8(58-81)y. Mean SFCT of neovascular AMD group were significantly thicker than non-neovascular AMD group(<i>P</i><0.05). In non-neovascular AMD group, there was no statistically significant difference between the mean SFCT and the mean temporal-nasal choroid thickness(<i>P</i>>0.05). In neovascular AMD group, there was a statistically significant difference between the mean SFCT and the mean temporal-nasal choroid thickness(<i>P</i><0.05).<p>CONCLUSION: Choroidal thickness measurements with OCT device can make a contribution to the understanding the phatophysiology of AMD and large prospective studies should be conducted to understand why SFCT was thicker in neovascular AMD
Genotoxicity of anti-tumor necrosis factor therapy in patients with juvenile idiopathic arthritis
Objective. To assess the possible effects of both inflammation and the anti-tumor necrosis factor agents (anti-TNF) on DNA damage with a specific assay, and their effects on the repair capacity of DNA. Methods. From a group of 20 children with juvenile idiopathic arthritis (JIA), 16 patients who completed the study and 16 control subjects were evaluated. DNA damage and repair capacity were analyzed by the comet assay at the level of peripheral lymphocytes before anti-TNF (etanercept) injections and on the 15th, 90th, and 180th days after the first injection. Results. The amount of damage as detected by the aforementioned assay was higher in patients with JIA compared with controls. On the 15th day after the initial anti-TNF injection, there was a decrease in the mean DNA tail length of JIA patients, however on the 90th day an increase was observed; thereafter, an upward trend was observed until the end of the study. JIA patients had a DNA repair capacity that was significantly less than that of controls. Conclusion. The results of the comet technique suggests that JIA patients already have increased basal DNA damage before anti-TNF therapy; they are more sensitive to the DNA damage produced by H 2O 2, and have a less efficient DNA repair system in comparison with control cells. After an initial improvement at 2 weeks, parameters of genotoxicity worsened, and DNA repair was further impaired 6 months after the addition of an anti-TNF agent to treatment. © 2010, American College of Rheumatology
Massive hemoptysis and deep venous thrombosis presenting in a woman with Hughes-Stovin syndrome: a case report
<p>Abstract</p> <p>Introduction</p> <p>Hughes-Stovin syndrome is a very rare disease with fewer than 30 cases reported in the literature. The disease is thought to be a variant of Behcet's disease and is defined by the presence of pulmonary artery aneurysm in association with peripheral venous thrombosis.</p> <p>Case presentation</p> <p>A previously healthy 23-year-old Saudi woman presented with massive hemoptysis a day prior to her admission to our hospital. She had a six-month history of recurrent fever, cough, dyspnea, and recurrent oral ulceration. Contrast-enhanced computed tomography scan of her chest and pulmonary angiogram demonstrated a single right-lower lobe pulmonary artery aneurysm. She underwent thoracotomy and right lower lobe resection. Her postoperative course was complicated by deep vein thrombosis. She also developed headache and papilledema, while a magnetic resonance imaging of her brain suggested vasculitis. Based on these clinical presentations, she was diagnosed and treated with Hughes-Stovin syndrome.</p> <p>Conclusion</p> <p>The majority of cases of Hughes-Stovin syndrome are reported among men, with only two cases occurring in women. A case of Hughes-Stovin syndrome occurring in a woman is presented in this report. She was treated successfully with multimodality treatment that includes surgery, steroids and cytotoxic agents.</p
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