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Review of the school managers between the textical leadership behavior and the vocational consultancy levels of sports teachers
No full textLisansüstü Eğitim Enstitüsü, Beden Eğitimi ve Spor Ana Bilim DalıBu araştırma, okul yöneticilerinin toksik liderlik davranışları ile beden eğitimi ve spor öğretmenlerinin mesleki tükenmişlik düzeyleri arasındaki ilişkilerin incelenmesi amacıyla yapılmıştır. Bu bağlamda nicel olarak yürütülen çalışmanın amacıyla tutarlı olarak ilişkisel tarama modeli kullanılmıştır. Araştırma grubu, 89 kadın ve 167 erkek olmak üzere toplam 256 beden eğitimi ve spor öğretmeninden oluşmaktadır. Bu araştırma grubunun seçiminde kolayda örnekleme yönteminden faydalanılmıştır. Veri toplama aracı olarak anket formu kullanılmış olup bu form üç bölümden oluşmaktadır. Bu anket formunun birinci bölümünü "Kişisel Bilgi Formu", ikinci bölümünü "Toksik Liderlik Ölçeği" ve üçüncü bölümünü "Maslach Tükenmişlik Envanteri-Eğitimci Formu" oluşturmaktadır. Bu form aracılığıyla elde edilen ham verilerin ilk olarak veri türü gözetilerek tanımlayıcı istatistikleri hesaplanmıştır. Araştırmada elde edilen verilere ilişkin farklılık ve korelasyon analizleri yapılmıştır. Buna göre katılımcıların toksik liderlik algıları bağlamında aktif olarak spor yapma durumu ve algılanan aylık kişisel gelir düzeyi değişkenlerine göre anlamlı farklılıklar bulunmuştur. Ancak katılımcıların cinsiyet, medeni durum, eğitim durumu, okul kademesi, idari görev geçmişi, okul yeri ve algılanan aylık aile gelir düzeyi değişkenlerine göre toksik liderlik algılarında anlamlı bir farklılık tespit edilmemiştir. Bununla birlikte katılımcıların aile gelir düzeyi değişkeni ile toksik liderlik algıları arasında anlamlı bir ilişki bulunmuştur. Diğer taraftan katılımcıların yaş, kişisel gelir düzeyi ve çalışma yılı değişkenleri ile toksik liderlik algıları arasında anlamlı bir ilişki tespit edilmemiştir. Buna ek olarak katılımcıların tükenmişlikleri bağlamında medeni durum ve okul yeri değişkenlerine göre anlamlı farklılıklar bulunmuştur. Ancak katılımcıların cinsiyet, eğitim durumu, okul kademesi, idari görev geçmişi, aktif spor yapma durumu, algılanan aylık kişisel gelir düzeyi ve algılanan aylık aile gelir düzeyi değişkenlerine göre tükenmişliklerinde anlamlı bir farklılık tespit edilmemiştir. Bununla birlikte katılımcıların yaş, aile gelir düzeyi ve çalışma yılı değişkenleri ile tükenmişlikleri arasında anlamlı ilişkiler bulunmuştur. Diğer taraftan katılımcıların kişisel gelir düzeyi değişkeni ile tükenmişlikleri arasında anlamlı bir ilişki tespit edilmemiştir. Sonuç olarak katılımcıların toksik liderlik algıları ile mesleki tükenmişlikleri arasında pozitif yönlü anlamlı ilişkilerin olduğu bulunmuştur. Bu doğrultuda katılımcıların toksik liderlik algıları yükseldikçe mesleki tükenmişliklerinin de yükseldiği ileri sürülebilmektedir. Anahtar Kelimeler: Toksik liderlik, tükenmişlik, mesleki tükenmişlik, öğretmen, beden eğitimi ve spor öğretmeni.This research was conducted to examine the relationships between toxic leadership behaviors of school administrators and the occupational burnout levels of physical education and sports teachers. In this context, a consistent relational screening model was used for the purpose of the quantitatively conducted study. The research group consisted of 89 women and 167 men, with a total of 256 physical education and sports teachers. In the selection of this research group, easy sampling method was used. A survey form was used as a data collection tool and this form consists of three parts. The first part of this survey form is "Personal Information Form", the second part is "Toxic Leadership Scale" and the third part is "Maslach Burnout Inventory-Learner Form". The raw data obtained through this form was first calculated with identifying statistics being taken into account by the data type. Differences and correlations analysis of the data obtained in the research were performed. Accordingly, significant differences were found in the context of the participants' perception of toxic leadership according to the variables of the state of active sports and perceived monthly personal income level. However, according to the gender, marital status, educational status, school level, administrative duty history, school location and perceived monthly family income level variables, no significant difference was identified in toxic leadership perceptions. However, a significant relationship was found between the family income level variable of the participants and their perception of toxic leadership. On the other hand, no significant relationship was identified between the age, personal income level and work year variables and toxic leadership perceptions of the participants. In addition, in the context of burnout of the participants, significant differences were found according to marital status and school location variables. However, the gender of the participants, education status, school level, administrative duty history, active sports status, etc, no significant differences in burnout were identified based on perceived monthly personal income level and perceived monthly family income level variables. However, significant associations were found between the age, family income level and the study year variables and burnout of the participants. On the other hand, no significant relationship was identified between the personal income level variable and burnout of the participants. As a result, it was found that there were positive and meaningful relationships between the participants' perceptions of toxic leadership and their professional burnout. In this respect, it can be argued that as the toxic leadership perceptions of the participants increase, their professional burnout increases. Keywords: Toxic leadership, burnout, occupational burnout, teacher, physical education and sports teacher
Solidification analysis for variable thickness aluminum castings: simulation and chill design insights
No full textManufacturing high-quality casting parts with complex geometries requires high engineering skill and precision. One essential quality concern is isolated hot spots within the castings, often in thick sections. Each hot spot must be consistently fed or mitigated through directional solidification techniques. The impact of various mold sands and the geometry of chill parts on solidification direction was investigated using specialized casting and general-purpose simulation programs. A parametric optimization method was employed to analyze directional solidification to adjust the geometry of the chill parts. The results indicate that employing diverse mold sands to enhance cooling in the thick sections was a viable strategy for achieving directional solidification in parts where the feeding pathway is obstructed due to changes in cross-section. Furthermore, the study revealed that intricate details in the chill part's geometry are not critical; however, a minimum volume (or weight) was necessary for adequate directional solidification. Lastly, an easily applicable mathematical model has been developed to determine the required volume of chill parts to ensure successful directional solidification.We thank Dr Li Wang for his help with the COMSOL program. We would like to thank David Schmidt for his assistance with SOLIDCast Program.We thank Dr Li Wang for his help with the COMSOL program. We would like to thank David Schmidt for his assistance with SOLIDCast Program
Determination of the Natural Frequency Change of Different Bayburt Stone (Tüfit) Sizes During the Transportation in the Screw Conveyor
No full textThe mechanism that carries the powder or tiny granular particles with the rotational movement of the spiral shaft is called the screw conveyor. The working principle of screw conveyors is transporting dust particles due to rotating the screw shaft placed in a cylindrical pipe with engine power. The transport process transfers the powder particles to the conveyor from the feed pipe at the top of the mechanism to the wings (helix) of the helix shaft. In this study, a scaled prototype of the screw conveyor was produced. Different Bayburt stone (Tüfit) sizes were transported utilizing the prototype, and changes in the natural frequency of the screw conveyor were measured during particle transportation. The natural frequency value of the fine particles of Bayburt stone is determined as the lowest (15.67 Hz), and the natural frequency value is determined as high in the coarse particles (20.32 Hz). This is expected for this test, which is an example of forced vibration. The increase in the weight of the particles with increasing volumetric size also causes an increase in the external force values they create. The increase in mass value and the change in dynamic loads increased the natural frequency value for forced vibration. It has been observed that the natural frequency values increase in the range of 10-15 percent with the increase in particle sizes from fine to coarse. As a result, it has been determined that the size of the particles carried on the conveyor is important in determining the natural frequency of the system
Exploring Turkish parents' lived experiences on online science lessons of their children with mild intellectual disability amid the COVID-19 pandemic
No full textBackground: The purpose of this qualitative study was to explore Turkish parents' lived experiences on online science lessons of their children with mild intellectual disability amid COVID-19 pandemic. Method: This study used the phenomenological qualitative research design. Participants in this study were 16 parents, who have children with mild intellectual disability and participated in one-on-one semi-structured phone calls. Interview data were thematically analyzed. Result: Five overarching themes were found: (1) parents' general experiences on online science lessons, (2) advantages of online science lessons, (3) disadvantages of online science lessons, (4) barriers in online science lessons, and (5) parents' recommendations for online science lessons. Conclusion: The results revealed that the majority of parents agreed on the school closure policy due to the COVID-19 pandemic, but were not satisfied with the online science lessons, and focused on the disadvantages of online science lessons for their children with mild intellectual disability
A higher-order finite element for static, free vibration, and buckling analyses of functionally graded beams
No full textLisansüstü Eğitim Enstitüsü, İnşaat Mühendisliği Ana Bilim DalıBu çalışmada fonksiyonel derecelendirilmiş (FD) kirişlerin statik, serbest titreşim ve burkulma analizleri için kayma deformasyon etkilerini dikkate alan yüksek mertebeli 16 serbestlikli sonlu eleman önerilmiştir. Önerilen sonlu elemanın doğruluğunun ispatı için sonlu eleman çözümüne ek olarak Ansys Mechanical Apdl programı kullanılarak çözümle yapılmıştır. Birinci bölümde, FD malzemelerle ilgili bilgiler ve kapsamlı bir literatür araştırması sunulmuştur. İkinci bölümde, yüksek mertebeli sonlu eleman kullanılarak FD kirişlerin statik, serbest titreşim ve burkulma analizlerinin formülasyonları açık olarak verilmiştir. Üçüncü bölümde, FD kirişlerin önerilen sonlu eleman ve Ansys programı ile elde edilen doğal frekanslarının, kritik burkulma yüklerinin, yer değiştirmelerinin ve gerilmelerinin boyutsuz olarak sayısal sonuçları verilmiştir. Ayrıca bu yöntemler kendi aralarında ve literatürle karşılaştırılmıştır. Dördüncü bölümde, çalışmadan çıkan sonuçlar ve ileride yapılabilecek çalışmalar önerilmiştir.This study proposes a high-order 16-degree-of-freedom finite element for the static, free vibration, and buckling analysis of functionally graded (FG) beams, considering the shear deformation effects. In addition to the finite element solution, the accuracy of the proposed finite element is validated using the Ansys Mechanical Apdl program. The first section presents information on FG materials and a comprehensive literature review. The second section provides explicit formulations for FG beams' static, free vibration, and buckling analyses using the high-order finite element. The third section gives the numerical results of the natural frequencies, critical buckling loads, displacements, and stresses of the FG beams obtained with the proposed finite element and Ansys program. In addition, these methods were compared among themselves and with the literature. The fourth section discusses the obtained results within the scope of the study and proposes future research directions
The Phenolic Profile and Anti-Inflammatory Effect of Ethanolic Extract of Polish Propolis on Activated Human Gingival Fibroblasts-1 Cell Line
No full textPropolis, owing to its antibacterial and anti-inflammatory properties, acts as a cariostatic agent, capable of preventing the accumulation of dental plaque and inhibiting inflammation. The anti-inflammatory properties of propolis are attributed to caffeic acid phenethyl ester (CAPE), which is present in European propolis. The objective of the conducted study was to assess the anti-inflammatory effects of the Polish ethanolic extract of propolis (EEP) and isolated CAPE on stimulated with LPS and IFN-alpha, as well as the combination of LPS and IFN-alpha. The cytotoxicity of the tested compounds was determined using the MTT assay. The concentrations of specific cytokines released by the HGF-1 cell line following treatment with EEP (25-50 mu g/mL) or CAPE (25-50 mu g/mL) were assessed in the culture supernatant. In the tested concentrations, both CAPE and EEP did not exert cytotoxic effects. Our results demonstrate that CAPE reduces TNF-alpha and IL-6 in contrast to EEP. Propolis seems effective in stimulating HGF-1 to release IL-6 and IL-8. A statistically significant difference was observed for IL-8 in HGF-1 stimulated by LPS+IFN-alpha and treated EEP at a concentration of 50 mu g/mL (p = 0.021201). Moreover, we observed that CAPE demonstrates a stronger interaction with IL-8 compared to EEP, especially when CAPE was administered at a concentration of 50 mu g/mL after LPS + IFN-alpha stimulation (p = 0.0005). Analysis of the phenolic profile performed by high-performance liquid chromatography allowed identification and quantification in the EEP sample of six phenolic acids, five flavonoids, and one aromatic ester-CAPE. Propolis and its compound-CAPE-exhibit immunomodulatory properties that influence the inflammatory process. Further studies may contribute to explaining the immunomodulatory action of EEP and CAPE and bring comprehensive conclusions.Medical University of SilesiaThis work is the product of an Erasmus + mobility project
Women's unregistered employment and economic growth: The sample of Turkey
No full textLisansüstü Eğitim Enstitüsü, İktisat Ana Bilim Dalı, İktisat Bilim DalıKayıt dışı ekonomi ve işgücü piyasasındaki yansıması olan kayıt dışı istihdam, Türkiye için önemli sorunlardandır. Kayıt dışı istihdamda en çok yer alan bireyler ise kadınlardır. Kayıt dışı kadın istihdamının ekonomik büyüme üzerindeki etkisinin belirlenmesi amaçlanan bu çalışmada öncelikle büyüme, kayıt dışı ekonomi ve kayıt dışı istihdam kavramlarına ilişkin açıklamalar yapılarak Türkiye'de kayıt dışılığın görünümü ve kadın istihdamı ile ilgili kuramsal çerçeveye yer verilmiştir. Çalışma ile ilgili literatür taramasının ardından ampirik analiz sonuçları açıklanmıştır. 2007-2021 dönemini kapsayan bu çalışmada, Türkiye'nin Düzey 2 bölgelerine ait GSYH, kayıtlı kadın istihdamı, kayıt dışı kadın istihdamı, göç, doğum ve nüfus değişim oranı verileri ile Türkiye'de kayıt dışı kadın istihdamının büyüme üzerine etkisi, panel veri yöntemi kullanılarak incelenmiştir. Seriler arası eşbütünleşme ilişkisinin tespiti için Kao ve Pedroni eşbütünleşme testi uygulanmış ve serilerin eş bütünleşik olduğu tespit edilmiştir. Değişkenler arası nedensellik testinde ise kayıt dışı kadın istihdamı, göç, doğum ve nüfus değişim oranı değişkenleri ile GSYH arasında nedenselliğin etkili olduğu ancak kayıtlı kadın istihdamının GSYH arasında herhangi bir nedenselliğin olmadığı tespit edilmiştir. Ayrıca doğum ve nüfus değişkenlerinin kayıt dışı kadın istihdamının Granger nedeni olduğu ancak göç değişkeninin kayıt dışı kadın istihdamının Granger nedeni olmadığı belirlenmiştir. Yapılan regresyon analizi sonucunda ise kayıt dışı kadın istihdamının ekonomik büyümeyi ters yönde ve önemli düzeyde etkilediği, kayıt dışı kadın istihdamındaki yükselişin ekonomik büyümeyi negatif yönde etkilediği sonucuna varılmıştır.The informal economy and its reflection in the labor market, unregistered employment, are among the important problems for Türkiye. Women are the individuals involved in the unregistered employment mostly. In the present study aiming to determine the effects of women's unregistered employment on economic growth, explanations are made about the concepts of growth, unregistered economy and unregistered employment firstly, and the theoretical framework regarding the appearance of unregistered employment and women's employment in Turkey is included. The empirical analysis results are explained following the literature review of the study. In this study covering the period 2007-2021; GDP, women's registered employment, women's unregistered employment, migration, birth and population change rate data of Turkey's Level 2 regions and the effect of women's unregistered employment on growth in Turkey are examined using the panel data method. Kao and Pedroni cointegration test was applied to determine the cointegration relationship between the series and it is found that the series are cointegrated. In the causality test between variables, it is seen that there is a causality between the variables of women's unregistered employment, migration, birth and population change rate and GDP, but there is no causality between women's registered employment and GDP. In addition, it was determined that birth and population variables are Granger reasons for women's unregistered employment, but migration variables are not Granger reasons for women's unregistered employment. As a result of the regression analysis, it is concluded that women's unregistered employment affects economic growth negatively at a significant level, and the increase in women's unregistered employment affects economic growth negatively
ORGANİZASYONDA İŞİN POZİTİF ANLAMINA ETKİ EDEN FAKTÖRLERİN BELİRLENMESİNE YÖNELİK BİR ARAŞTIRMA: DEVLET VE VAKIF ÜNİVERSİTESİ AYRIMI İSTANBUL ÖRNEKLEMİ
No full textAraştırmanın amacı akademisyenlerin işlerinin pozitif anlamına etki eden faktörleri belirlemektir. Bu amaçla organizasyonda akademik özgürlük, yetenek, işe odaklanma ve demografik değişkenlerin etkileri incelenmiştir. Araştırmanın kapsamı İstanbul’da devlet ve vakıf üniversitelerinde faaliyette bulunan ve araştırmaya gönüllü katılım sağlayan 1567 akademisyenden oluşmaktadır. Araştırmada oluşturulan hipotez modelleri ile hem genel modellere hem de devlet ve vakıf üniversiteleri için spesifik modellere yer verilmiştir. Araştırmanın genel modelinde akademisyenlerin organizasyonlarındaki özgürlükleri işlerinin pozitif anlamına katkıda bulunmuştur. Akademisyenlerin organizasyonlarındaki özgürlüğü yeteneklerinin gelişimine katkı sağlamıştır. Araştırmada akademisyenlerin özgürlüğünün işlerine odaklanmasına ciddi düzeyde katkısı olduğu gözlemlenmiştir. Akademisyenlerin işlerine odaklanması işlerinin pozitif anlamına da katkıda bulunmuştur. Akademisyenlerin yeteneği işlerinin pozitif anlamına katkı sağlamıştır. Moderator etkili genel modelde ise, akademisyenlerin özgürlüğünün yeteneklerinin gelişimi üzerindeki etkisinde işe odaklanmanın düzenleyici etkisi olduğu görülmüştür. Akademisyenlerin yeteneklerinin işlerinin pozitif anlamı üzerindeki etkisinde işlerine odaklanmaları düzenleyici etkiye sahip olmuştur. Akademik özgürlüğün işin pozitif anlamı üzerindeki etkisinde, işe odaklanma ve çalışan yeteneği birlikte aracı etkiye sahip olmuştur. Analizde akademisyenlerin yeteneklerinin işlerinin pozitif anlamı üzerindeki etkisinde yaşlarının ve akademik unvanlarının düzenleyici etkileri olduğu sonuçlarına erişilmiştir
Relationship of progranulin response with some physio-biochemical parameters in Akkaraman sheep
No full textProgranulin (PGRN) is a multifunctional protein that is critical in the retention of embryos in the endometrium of the uterus and the protection of cervical tissue during fetal growth. In case of PGRN release and dysfunction, cervical tissue may remodel (regeneration) and lead to the risk of abortion. Serum PGRN level in sheep and its variation according to different physiological periods and its relationship with some biochemical parameters are unknown. In this study, the relationship between early lactation, early and late pregnancy serum PGRN levels and some biochemical parameters in Akkaraman sheep was investigated for the first time. In the literature search, no similar studies were found on the relationship between early lactation, early and late pregnancy serum PGRN levels and some biochemical parameters in Akkaraman sheep. The research was carried out on 90 Akkaraman sheep reared in the same herd under the same care and feeding conditions. In the study, Akkaraman ewe were divided into 3 groups as early lactation, early pregnancy and late pregnancy. 1st group is early lactation period ewe (first 60 days of lactation), (n = 30), 2nd group is in the first period of pregnancy (on the 0-90th day of the first pregnancy (n = 30)), 3rd group is in the late pregnancy of pregnancy (100-150 days of pregnancy (n = 30)) was created. Blood samples from vena jugularis were taken before morning feeding from the animals that formed the study groups. PGRN levels in serum were determined by ELISA method. In addition, glucose, calcium (Ca), magnesium (Mg), phosphorus (P), total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), high density lipoprotein (HDL), very low density lipoprotein (VLDL) levels were analyzed in biochemistry autoanalyzer. As a result of the study, lactation and early pregnancy and late pregnancy mean serum PGRN levels were determined as 1.93, 1.78, 1.33 ng mL-1, respectively. The serum PGRN, glucose, Ca, Mg, P, TC, TG, LDL, HDL and VLDL levels of sheep with late pregnancy, early lactation and early pregnancy periods, which constitute the study groups, were found to be statistically significant (P<0.05). Our results have shown that due to the physiological role of PRGN in keeping the embryo in the endometrium of the uterine and in preserving the cervical tissue during fetal growth, there may be a useful parameter in the pursuit of the pregnancy process
Erratum: Evaluation of benzaldehyde derivatives as being bovine kidney aldose reductase inhibitors
No full textAldose reductase (AR) catalyzes the production of sorbitol from glucose in the polyol pathway, and it is a critical enzyme that causes an aberrant aggregation of sorbitol in insulin- independent tissues, create some problems including retinopathy, neuropathy, and nephropathy. AR inhibition has been shown to be a viable approach for reducing these side effects. The current study aimed to introduce new AR inhibitors to the literature. For this purpose, benzaldehydes were examined as being AR inhibitors. Firstly, the homogenate was prepared from the bovine kidney, then inhibition studies were carried out. It was found that all derivatives inhibited AR. The inhibitory potency of 4- Phenyl benzaldehyde (3) and 2- Bromobenzaldehyde (6), having IC50 values as 0.23 and 1.37 ?M, respectively, was determined higher than standard inhibitor sorbinil. After in vitro inhibition studies, estimated binding energies and binding modes of derivatives with enzyme were predicted by molecular docking. Compound 3 exhibited a maximum docking score of -8,61 kcal/mol. In conclusion, these compounds especially compound 3 may be guiding agents that can be used to synthesize new drug candidate molecules to treat or prevent diabetic complications