Quantum chemical investigations on acetylenic carbon rich compounds as molecular construction kit

Thesis (Master)--İzmir Institute of Technology, Chemistry, İzmir, 2004Includes bibliographical references (leaves: 76-86)Text in English; Abstract: Turkish and Englishxi, 90 leavesGround and excited state behaviors of Radialenes, Expanded Radialenes and TEE monomer and dimer derivatives, which are carbon rich compounds were investigated by using quantum chemical calculations. Most of these advanced materials have non-linear optical properties and they can be used as molecular electronics. AM1 and DFT/B3LYP with 3-21G and 6-31G* basis sets methods were used for the ground state calculations of radialenes, expanded radialenes and TEE monomers and dimers. TDDFT/3-21G, TDDFT/6-31G* level of calculations were carried out for the excited state behaviors on AM1, DFT/3-21G* and DFT/6-31G* ground state structures. All the methods that we have used gave similar results with a very small discrepansies. Radialenes and expanded radialenes have planar ground state structures except the one with size 6; the three dimensional chair like geometry is slightly stable than the planar one. There is no effect of the size of radialenes on the the geometrical parameters. The introduction of ethynyls instead of hydrogens causes a red-shift about 100-150 nm. The maximum absorption wavelength usually increases with the size of radialenes with some exceptions for the planar structures. The effect of various acceptors such that p-NO2-benzene- , p-CH3-benzene-, p-CHO-benzene- and their locations which are mainly CIS, TRANS and GEMINAL with respect to donor positions to the TICT state on push-pull TEE derivatives were investigated by using excited state calculations. The probable donor units on the TEE derivates were considered as dimethyl amine and dimethyl aniline units. TICT property for the rotation of dimethylaniline group is observed for many of isomers. TICT state appeared both for cis and trans conformer of the donor substituted TEE dimer

Attachment Styles, Self-Construal, Sociodemographic Variables and Discriminatory Attitudes in Turkish Counselor Candidates

In this study, relationship of counselor candidates’ discriminatory attitudes to religiosity, political ideology, academic achievement, self-construal and attachment styles was examined. Differences in discriminatory attitudes in terms of gender and class level variables were also investigated. The study was carried out with 383 counseling students from a state university which located in northeast of Turkey. The data were collected with Sociodemographic Data Form, Discriminatory Attitudes Scale, Relational, Individual and Collective Self-Aspects Scale and Relationship Scales Questionnaire. Discriminatory attitudes were found as significantly related with religiosity, political ideology, academic achievement, self-construal and attachment styles. Besides, religiosity, political ideology, academic achievement, individualistic and collectivist self-construal emerged as significant predictors of discriminatory attitudes. In terms of gender, male students were found as having stronger discriminatory attitudes than female students to homosexuals, women, different races-ethnicities and religions and in total. There were no significant differences by class-level except discrimination against women. By discussing these findings, suggestions for counselor education and further studies were presented. Keywords: Counseling, discriminatory attitudes, education

Climate change and forestry in Turkey: impacts and adaptation measures

Turkey has various climate types in different regions. A Mediterranean climate prevails in Turkey’s Mediterranean and Western Anatolian regions, a temperate climate with high precipitation in every season along the Black Sea coast, a continental climate in the inland regions and a semi-arid climate in Central and South-eastern Anatolia. Most precipitation occurs in the winter months. Total annual rainfall is least in the low-lying areas of eastern Anatolia (220mm), and highest along the eastern Black Sea coast (2420mm). The average annual rainfall for the entire country is 643 mm, generating a water potential of 501 billions m3/year. Turkey has about 21.3 million hectares of forest area that covers around 27.2% of the country’s land area. Half of the total forest area is high forests and the remaining is coppices. Forests are generally located on mountainous areas and they are usually natural and semi-natural with high biodiversity values. It is expected that climate change will seriously affect Turkeys’ forests. Dalfes at al. (2007) analyzed the climate data from 113 stations of the State Meteorological Service in Turkey for the period between the years 1951-2004 and they observed that winter precipitation in western Turkey has decreased significantly whereas autumn precipitation has increased at stations in the northern parts of central Anatolia. The reason behind these changes is not well understood, and the need for more comprehensive study is underlined. The authors report widespread increase in summer temperatures mostly in the western and southwestern parts of Turkey while winter temperatures show a general tendency to decrease. The more significant changes are concentrated in coastal stations. Stream flow data based on measurements from 1969 to 1998 indicate a decreasing trend in western and southwestern regions and some increase in the north

Pathological investigation of childhood foreskin: are lichen sclerosus and phimosis common?

WOS: 000369704200014PubMed: 26876402Objective: To evaluate histopathological results of foreskin removed during circumcision in the pediatric age group and the relationship between these and the degree of phimosis. Study Design: Cross-sectional study. Place and Duration of Study: Department of Urology, Samsun Training and Research Hospital, Samsun, Turkey, from June to December 2014. Methodology: Male children undergoing planned circumcision were examined for the presence and degree of phimosis which was recorded before the operation. After circumcision, the preputial skin was dermatopathologically investigated. Pathological investigation carefully evaluated findings such as acute inflammation, chronic inflammation, increased pigmentation and atrophy in addition to findings of Lichen Sclerosus (LS) in all specimens. the pathological findings obtained were classified by degree of phimosis and evaluated. Results: the average age of the 140 children was 6.58 +/- 2.35 years. While 61 (43.6%) children did not have phimosis, 79 (56.4%) patients had different degrees of phimosis. Classic LS was not identified in any patient. in a total of 14 (10%) children, early period findings of LS were discovered. the frequency of LS with phimosis was 12.6%, without phimosis was 6.5% (p=0.39). the incidence of histopathologically normal skin in non-phimosis and phimosis groups was 37.7% and 22.7%, respectively. in total, 41 (29.3%) of the 140 cases had totally normal foreskin. Conclusion: Important dermatoses such as LS may be observed in foreskin with or without phimosis. the presence of phimosis may be an aggravating factor in the incidence of these dermatoses

A Hybrid Framework for Sequential Data Prediction with End-to-End Optimization

We investigate nonlinear prediction in an online setting and introduce a hybrid model that effectively mitigates, via an end-to-end architecture, the need for hand-designed features and manual model selection issues of conventional nonlinear prediction/regression methods. In particular, we use recursive structures to extract features from sequential signals, while preserving the state information, i.e., the history, and boosted decision trees to produce the final output. The connection is in an end-to-end fashion and we jointly optimize the whole architecture using stochastic gradient descent, for which we also provide the backward pass update equations. In particular, we employ a recurrent neural network (LSTM) for adaptive feature extraction from sequential data and a gradient boosting machinery (soft GBDT) for effective supervised regression. Our framework is generic so that one can use other deep learning architectures for feature extraction (such as RNNs and GRUs) and machine learning algorithms for decision making as long as they are differentiable. We demonstrate the learning behavior of our algorithm on synthetic data and the significant performance improvements over the conventional methods over various real life datasets. Furthermore, we openly share the source code of the proposed method to facilitate further research

Metallerle etkileştirilen tere bitkisinde (lepidium sativum) bazı enzim aktivitelerinin incelenmesi

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Anahtar kelimeler: Tere (Lepidium Sativum), süperoksit dismutaz, katalaz, peroksidaz, polifenol oksidaz, Fe, Cu, Co, Pb, CdBu araştırmada, tere bitkisinde süperoksit dismutaz (SOD), katalaz (CAT), peroksidaz (POD) ve polifenol oksidaz (PPO) aktiviteleri üzerine bitki için esas elementlerden olan Fe, Cu ve esas olmayan elementlerden olan Co, Pb ve Cd'nin etkileri incelenmiştir. Bitkilerin büyütüldüğü ortama 2 gün ara ile farklı konsantrasyonlarda FeCl2, CuSO4, Pb(NO3)2, CoCl2 ve CdCl2 çözeltileri stres faktörleri olarak uygulanmıştır. Bitkiler, 4-5 yaprak, belirli bir büyüklüğe erişince hasat edilmiştir. Bitki yaprakları ekstrakte edilerek enzim elde edilmiştir. Bu enzimlerden SOD, CAT, POD ve PPO aktiviteleri ölçülmüştür.Fe, Cu, Co, Pb ve Cd stresleri sonucunda SOD, CAT, POD, PPO aktivitelerinin arttığı belirlenmiştir. Bitkideki strese cevapta, SOD, CAT, POD, PPO enzimlerin önemli rolleri olduğu bilinmektedir. Sonuç olarak, bu enzimlerin Fe, Cu, Co, Pb ve Cd stres etkilerinin uzaklaştırılmasında da önemli roller aldığı düşünülmektedir.Key words: cress (Lepidium Sativum), superoxide dismutase, catalase, peroxidase, polyphenol oxidase, Fe, Cu, Co, Pb, CdIn this study, the cress (Lepidium Sativum) plant superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and polyphenol oxidase (PPO) activities were investigated for the plant on the basis of the elements Fe, Cu and non-essential elements of the Co, Pb and Cd. Environment where of plants raised , FeCl2, CuSO4, Pb (NO3) 2, CoCl2 and CdCl2 were applied with an interval of 2 days with different concentrations solutions as stress factors. Plants were harvested 4-5 sheets when size reached a certain. Plant leaves were extracted and enzyme was obtained. SOD, CAT, POD and PPO activities were measured from these enzymes.Generally, SOD, CAT, POD, PPO activities were increased as a result of statistical Fe, Cu, Co, Pb and Cd stresses. SOD, CAT, POD, PPO enzymes are known to play important roles in the plant response to stress. As a result, the important roles of these enzymes are thought Fe, Cu, Co, Pb and Cd in the removal of the effects of stress

Sadık bir dost:Yunus Emre

Taha Toros Arşivi, Dosya No: 91/A-Yunus Emr

Elastik Zemine Oturan Fonksiyonel Derecelendirilmiş Kare Bir Plağın Statik Yükler Altında Davranışı

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2015Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2015Bu çalışmada, elastik zemine oturan fonksiyonel derecelendirilmiş (FD) kare bir plağın statik davranışı Ritz yöntemi ile Kirchhoff-Love plak teorisi çerçevesinde incelenmiştir. Ritz yönteminin uygulanması için plak yer değiştirme fonksiyonu kuvvet serisine açılmıştır. Sınır koşulları yer değiştirme fonksiyonuna yardımcı bir fonksiyon ilave edilmesiyle sağlatılmıştır. Çalışmada, farklı malzeme kompozisyonları, farklı sınır koşulları ve elastik zemin parametresinin plağın yer değiştirmeleri ve eksenel normal gerilmeler üzerindeki etkisi incelenmiştir.In this study, the static behavior of a functionally graded (FG) square plate resting on the elastic foundation is investigated via Ritz method within the framework of Kirchhoff-Love plate theory. In order to apply Ritz method, the trial function for the deflection of the plate is expressed in the polynomial form. Boundary conditions are satisfied by adding an auxiliary function to the trial function. The effects of various material compositions, boundary conditions and the parameter of elastic foundation on the deflection and axial normal stress of the plate are examined