Kazan Meslek Yüksekokulu / Kazan Vocational School
Permanent URI for this collectionhttps://hdl.handle.net/11727/2077
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Item Covering the More Visible Region by Electrochemical Copolymerization of Carbazole and Benzothiadiazole Based Donor-Acceptor Type Monomers(2019) Cansu-Ergun, Emine Gul; 0000-0002-3941-4345; I-7385-2017An electrochromic copolymer film of 2-(3,3-dihexyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepin-6-yl)-7-(3,3-dihexyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepin-8-yl)-9H-carbazole (M1) and 4,7-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole (M2) was prepared via electrochemical technique. The copolymerization was performed with one to one monomer feed ratio. Electrochemical and optical properties of the resulting copolymer film (P3) and the homopolymer films of M1 and M2 (P1 and P2) were investigated by using cyclic voltammetry and UV-Vis spectrometry techniques, and the corresponding results were compared. Incorporation of M1 and M2 into copolymer matrix was clearly observed on the resulting cyclic voltammograms and UV-Vis spectra. P3 covered the visible regions coming from both P1 and P2, and exhibited a neutral state darker color than those of homopolymers. P3 film was found to have a multichromic behavior, appearing as brown in its neutral state while changing its color upon oxidation to dark-gray (at about 0.3 V), to blue (at about 0.6 V) and finally to grayish cyan (beyond 0.9 V), with a corresponding optical band gap of 1.65 eV.Item Pulse frequency fluctuations of magnetars(2019) Cerri-Serim, D.; Serim, M. M.; Sahiner, S.; Inam, S.C.; Baykal, A.; 0000-0003-0820-9186Using RXTE, Chandra, XMM-Newton and Swift observations, we construct the power spectra and torque noise strengths of magnetars for the first time. For some of the sources, on time-scales of months to years, we measure strong red noise that might be a consequence of their outbursts. We compare the noise strengths of magnetars with those of radio pulsars by investigating the possible correlations of noise strength with spin-down rate, magnetic field and age. Using these correlations, we find that the noise strengths of magnetars obey similar trends as radio pulsars. However, we do not find any correlation between noise strength and X-ray luminosity, a correlation that has been seen in accretion-powered pulsars. Our findings suggest that the noise behaviour of magnetars resembles that of radio pulsars, but magnetars possess higher noise levels likely because of their stronger magnetic fields.Item Calibration transfer in temperature modulated gas sensor arrays(2016) Fernandez, L.; Güney, S.; Gutierrez-Galvez, A.; Marco, S.Shifts in working temperature are an important issue that prevents the successful transfer of calibration models from one chemical instrument to another. This effect is of special relevance when working with gas sensor arrays modulated in temperature. In this paper, we study the use of multivariate techniques to transfer the calibration model from a temperature modulated gas sensor array to another when a global change of temperature occurs. To do so, we built 12 identical master sensor arrays composed of three different types of commercial Figaro sensors and acquired a dataset of sensor responses to three pure substances (ethanol, acetone and butanone) dosed at 7 concentrations. The master arrays are then shifted in temperature (from -50 to 50 degrees C, Delta T = 10 degrees C) and considered as slave arrays. Data correction is performed for an increasing number of transfer samples with 4 different calibration transfer techniques: Direct Standardization, Piece-wise Direct Standardization, Orthogonal Signal Correction and Generalized Least Squares Weighting. In order to evaluate the performance of the calibration transfer, we compare the Root Mean Square Error of Prediction (RMSEP) of master and slave arrays, for each instrument correction. Best results are obtained from Piece-wise Direct standardization, which exhibits the lower RMSEP values after correction for the smaller number of transfer samples. (C) 2016 Elsevier B.V. All rights reserved.Item Causative Mutations and Mechanism of Androgenetic Hydatidiform Moles(2018) Nguyen, N.M.P.; Ge, Z.-J.; Reddy, R.; Fahiminiya, S.; Sauthier, P.; Bagga, R.; Sahin, F.I.; Mahadevan, S.f; Osmond, M.; Breguet, M.; Rahimi, K.; Lapensee, L.; Hovanes, K.; Srinivasan, R.; Van den Veyver, I.B.; Sahoo, T.; Ao, A.; Majewski, J.; Taketo, T.; Sim, R.; 0000-0001-7308-9673; 30388401; AAC-7232-2020Androgenetic complete hydatidiform moles are human pregnancies with no embryos and affect 1 in every 1,400 pregnancies. They have mostly androgenetic monospermic genomes with all the chromosomes originating from a haploid sperm and no maternal chromosomes. Androgenetic complete hydatidiform moles were described in 1977, but how they occur has remained an open question. We identified bi-allelic deleterious mutations in MEI1, TOP6BL/C11orf80, and REC114, with roles in meiotic double-strand breaks formation in women with recurrent androgenetic complete hydatidiform moles. We investigated the occurrence of androgenesis in Mei1-deficient female mice and discovered that 8% of their oocytes lose all their chromosomes by extruding them with the spindles into the first polar body. We demonstrate that Mei1−/− oocytes are capable of fertilization and 5% produce androgenetic zygotes. Thus, we uncover a meiotic abnormality in mammals and a mechanism for the genesis of androgenetic zygotes that is the extrusion of all maternal chromosomes and their spindles into the first polar body. © 2018 American Society of Human GeneticsItem Fetal HLA-G alleles and their effect on miscarriage(2018) Kubat, Gozde; Koc, Altug; Kirbiyik, Ozgur; Kutbay, Yasar B.; Ozyilmaz, Berk; Ozdemir, Taha R.; Kaya, Ozge Ozer; Koc, Zeynep Peker; 29809322Background. Immunosuppression at the feto-maternal interface is crucial for a successful pregnancy outcome. Human leukocyte antigen-G (HLA-G) seems to be a major contributor to fetal tolerance. The HLA-G expression is seen in cytotrophoblasts and in maternal blood. Fetal HLA-G acts on decidual antigen-presenting cells (APCs), natural killers (NKs) and T cells. Recent findings revealed that defects in placentation and their consequences are associated with maternal HLA-G variants and their expression levels. Objectives. The objective of this article is to investigate the relationship between fetal HLA-G alleles and miscarriage, which has not been investigated to date. Material and methods. The present study includes 204 recurrent miscarriage (RM) cases who were admitted to our clinic between 2012 and 2016. Twenty-eight miscarriage products without maternal cell contamination and any known pathology were analyzed by HLA-G typing. In addition, 3' untranslated region (UTR) 14-base pair (bp) insertion/deletion polymorphism was also investigated by Sanger sequencing. Results. For our population, the most frequent HLA-G type was G*01:01, both in the study group (30.3%) and in the control group (47%). The study revealed that the G*01:04 allele was significantly associated with miscarriage (p = 0.007). The 3' UTR 14bp deletion was more frequent in the miscarriage group, but there was no significant correlation. Conclusions. HLA-G alleles seem to be related with miscarriage and should be considered in RM cases.Item THE APPROACH OF ATATURK TO RELATIONS BETWEEN TURKEY AND ALBANIA BEFORE THE PROCLAMATION OF MONARCHY, IN THE LIGHT OF THE DIARIES OF RAUF FICO, THE MINISTER PLENIPOTENTIARY OF ANKARA(2018) Ozca, HalilThe diaries of RaufFico, Albanian Minister Plenipotentiary to Ankara, gives a lot of useful information about Albania-Turkey relations that had not been stumbled across in the literature until today. The aim of this study is to point out Atatiirk's views on relations between Albania and Turkey, Albania and Italy, as well as his suggestions to Albanian envoy in Ankara about how to overcome the Albanian dependency on Italy. The research is based on the diaries of Fico, Albanian Minister Plenipotentiary to Ankara. The study is limited with focusing on the Italian factor in Albania's relations with Turkey rather than examining all aspects of the relationship between the two independent countries. Fico had had formal education in the Ottoman Empire and occupied bureaucratic posts such as being provincial governor and following independence of Albania started to work for Albanian government as an important diplomat. Therefore, his diaries provide us a plenty of information on the question of Albania's relations with Turkey as well as with Italy, particularly between 1925 and 1928 during which there had been a Republican regime in Albania. In fact, Fico's diaries give perfect information about close relations between Turkey and Albania and the importance given by Mustafa Kemal Atatiirk on these relations at bilateral level, at least until the destruction of the Republican regime by Ahmet Zogu who would proclaim himself as the King of Albania in 1928. The content of the Fico's diaries are very rich in a way that they consist problems of Orthodox Albanians in Istanbul, positions of Albanians in Kosovo, the exchange of Albanian Chams, reforms in Turkey, assassination attempt to Atatirk in izmir and main themes in Nutuk. It should be kept in mind that the scope of this study is confined, first, to suggestions of Ataturk to the Albanian government regarding getting rid of dependency on Italy, and second, to his foresight about Italy's position towards Albania and Turkey. In this respect, the Fico's diaries give invaluable information on all these subjects elaborated in this paper.Item ÖZ DEĞERLENDİRMENİN 360 DERECE GERİ BESLEME YÖNTEMİNDEKİ İŞLEVSELLİĞİ(2012-06) Kubat, GözdeGünümüzde, insan faktörünün önemi işletmelerde uygulanan kalite çalışmaları kapsamında gittikçe artmaktadır. Çalışanlar işletmeler tarafından bir maliyet öğesi yerine yatırım yapılan değerli kaynaklar olarak görülmektedir. Bu nedenle kaliteyi arttırmak için performans değerlendirilmesi yapılmaktadır. Çalışanların performansları 360 Derece Geri Besleme Yöntemi alt boyutları ile ölçülmektedir. Bu çalışmanın amacı; 360 Derece Geri Besleme Yönteminin değerlendirme boyutlarından biri olan öz değerlendirmenin sistem içerisindeki işlevselliğinin araştırılmasıdır. Bu amaç doğrultusunda, öz değerlendirme alt boyutlarının demografik özelliklere göre yeterlilikleri ve boyutların birbirleri ile olan ilişkileri incelenmiştir. Bu değerlendirme yöntemine göre hazırlanmış bir anket formu kullanılmıştır. Anket çalışması Ankara ili Kazan ilçesi sınırları içinde çeşitli sektörlerde çalışan kişilerle gerçekleştirilmiştir ilk olarak, anket formunun güvenilirliği hesaplanmıştır. Öz değerlendirme alt boyutlarının demografik özelliklere göre yeterliliklerini puanlama yöntemi ve boyutların birbirleri ile olan ilişkilerini incelemek için de korelasyon analizi kullanılmıştır. Yapılan analiz sonuçlarına göre kişinin gerek demografik özellikler gerekse de boyutlar arası ilişkiler açısından kişinin kendini ortalamanın üzerinde değerlendirdiği belirlenmiştir.