Tekil Yük Etkisindeki I Kirişlerinde Yanal Desteklerin Yanal Burkulmaya Etkisi

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2013Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2013İnce cidarlı I kesitli kirişler günümüz yapı tekniğinde sıkça kullanılan yapı elemanlarıdır. Burulma rijitlikleri zayıf olan ince cidarlı I kesitli kirişlerin burulmaya karşı dayanımları bir takım desteklerle artırılabilir. Bu çalışmada tekil yük etkisindeki kirişlere eklenen yanal desteklerin yanal burkulma yükünü nasıl etkilediği ve elemana eklenecek olan desteklerin yeri ve ideal yay sabitlerinin sonlu eleman yöntemi ile belirlenmesi amaçlanmıştır. Çalışmanın sonunda, elemanlara eklenecek desteklerin ideal yeri ve yay sabitleri için sonuçlar verilmiştir.Thin-walled I beams are the structural elements that are used frequently in today’s construction techniques. Resistance against torsion of the thin-walled I-beams having weak torsional rigidity can be increased through some bracing. In this study, it is aimed to see how lateral bracings attached to the beams subjected to a vertical force affects lateral buckling moment, and to determine the ideal spring constants of the bracings to be attached to the beam by finite element method. In the end of this study, the results are given for ideal location and spring constants of bracings which are added to elements

SELECTION OF SEEDLING ROOTSTOCK FOR APRICOT

The aim of this study is to select promising wild apricot rootstocks among wild apricot populations propagated by seeds naturally found in Malatya, Erzincan, Nev?ehir, Sivas and Elaz?g provinces. In the first stage, land scans were carried out between 2007 and 2009 and 756 genotypes were determined which could be suitable for the characteristics of the rootstock by considering the phenotypic characteristics. On land surveys,  the wild apricot trees that are healthy, productive, bitter seeds, thornless, dwarth growth habit and smooth trunk structure was selected. Among the marked wild apricot types were selected 240 types in 2008, 262 types in 2009 and 254 types in 2010. Seeds taken from these determined wild apricot trees were planted for 2 years in Erzincan and Malatya locations and germination experiments were carried out. In the study, Hasanbey and Hac?halilo?lu apricot varieties were used as control plants. Seed germination percentage, seedling diameter, height, diameter and high homogeneity were determined. At the end of three years of germination experiments were evaluated according to weighting ranking score and finally 8 types that has hight score selected for Malatya location and 18 types for Erzincan location. In the second step, these 26 types after selected in germination tests, was grafted by cv. Hac?halilo?lu in Malatya and by cv. Hasanbey in Erzincan. After grafting success, shoot diameter, homogenity, shoot length and homogenity were evaluated. Then, the data was selected according to weighting ranking score and finally 7 types (58/6, 58/7, 24/111, 24/7, 24/25, 24/33 and 44/8) that has hight score selected for Malatya and Erzincan locations, and transferred to the third stage. In third stage, collection orchards will be established and rootstocks-scion, yield, phenological observations, pomological analysis, tree growth and habit will be evaluated.&nbsp

İkili Karşılaştırmalar Yargılarına ve Sıralama Yargılarına Dayalı Ölçekleme Yaklaşımlarının Karşılaştırılması

This study aims to provide an insight into the scaling model used in social sciences and to determine whether the two scaling method produces similar results based on the judgements decision. The study conducted 194 preservice teachers in the department of Science Teacher Education at Hacettepe University. The scaling procedure was conducted to get scaling values for pair-wise comparison and ranking judgment on the collected data. The Spearmen-rho correlation coefficient which was calculated to examine the consistency between the scale values was found 0,09 at a 0,05 significance level and this value was not significant (r=0.09, p>0.05). Based on these findings, these two scaling approaches didn’t produce similar conclusions so it can be said that attention should be paid to the selected scaling methods and assumptions in study of scalin

Distribution of polychaete species (Annelida: Polychaeta) on the polluted soft substrate of the Golden Horn Estuary (Sea of Marmara), with special emphasis on alien species

The present study deals with the polychaete assemblages inhabiting Polluted soft substrate of the Golden Horn Estuary (Sea of Marmara) and the importance of alien species in polychaete communities. A total of 15 species belonging to 7 families were determined among the benthic materials collected at 4 stations between the depths 4 and 40 in in December 2005. The materials were composed of species tolerant to pollution. Higher diversity and evenness index values were encountered at stations where dissolved oxygen values were relatively high and total organic carbon values were low. The material included four alien species: Desdemona ornata, Ficopomatus enigmaticus, Polydora cornuta and Streblospio gynobranchiata. The most dominant alien species in the area was P. cornuta, with 4340 individuals per square meter. Alien species comprised 46% of total polychaete populations and their distributions were strongly affected by the abiotic factors such as dissolved oxygen, total organic carbon and depth

A Retrospective Analysis of 83 Patients with Testicular Mass Who Underwent Testis-Sparing Surgery: The Eurasian Uro-oncology Association Multicenter Study

Introduction: Herein, we analyzed the histopathological, oncological and functional outcomes of testis-sparing surgery (TSS) in patients with distinct risk for testicular cancer. Methods: This is a multicenter retrospective study on consecutive patients who underwent TSS. Patients were categorized in high- or low-risk testicular germ cell tumor (TGCT) according to the presence/absence of features compatible with testicular dysgenesis syndrome. Histology was categorized per size and risk groups. Results: TSS was performed in 83 patients (86 tumors) of them, 27 in the high-risk group. Fifty-nine patients had a non-tumoral contralateral testis present. Sixty masses and 26 masses were benign and TGCTs, respectively. No statistical differences were observed in mean age (30.9 ± 10.32 years), pathological tumor size (14.67 ± 6.7 mm) between risk groups or between benign and malignant tumors (p = 0.608). When categorized per risk groups, 22 (73.3%) and 4 (7.1%) of the TSS specimens were malignant in the high- and low-risk patient groups, respectively. Univariate analysis showed that the only independent variable significantly related to malignant outcome was previous history of TGCT. During a mean follow-up of 25.5 ± 22.7 months, no patient developed systemic disease. Local recurrence was detected in 5 patients and received radical orchiectomy. Postoperative testosterone levels remained normal in 88% of those patients with normal preoperative level. No erectile dysfunction was reported in patients with benign lesions. Conclusion: TSS is a safe and feasible approach with adequate cancer control, and preservation of sexual function is possible in 2/3 of patients harboring malignancy. Incidence of TGCT varies extremely between patients at high and low risk for TGCT requiring a careful consideration and counseling