Lorentz uzayında bir parametreli dual hareketler

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.Bu tez altı bölümden oluşmaktadır. Birinci bölüm giriş kısmına ayrılmıştır. kincibölümde bu çalışma için gerekli kavramlar, tanımlar ve gerekli teoremler verilmiştir.Üçüncü bölümde E3 , 3-boyutlu Öklid uzayında aynı merkezli ve birbirine görehareket eden küre yüzeylerinin bir parametreli hareketi, kanonik izafi sistemi ve polnoktalarına değinilmiştir.Dördüncü bölümde D3 , 3-boyutlu dual uzayda aynı merkezli ve birbirine görehareket eden dual küre yüzeylerinin bir parametreli hareketi, kanonik izafi sistemi vepol noktaları işlenmiştir.Beşinci ve altıncı bölümler çalışmanın orijinal kısımlarıdır.Beşinci bölümde L3 , 3-boyutlu Lorentz uzayında aynı merkezli ve birbirine görehareket eden küre yüzeylerinin bir parametreli hareketi, kanonik izafi sistemi ve polnoktaları elde edilmiştir. L3 , 3-boyutlu Lorentz uzayında bir çok kürenin birbirinegöre bir parametreli küresel hareketinin ivmeleri, ivme merkezleri, ivme eksenleri vebunlarla ilgili teoremler elde edilmiştir.3Altıncı bölümde, D1 , 3-boyutlu dual Lorentz uzayında aynı merkezli ve birbirinegöre hareket eden dual küre yüzeylerinin bir parametreli hareketi, kanonik izafi3sistemi ve pol noktaları elde edilmiştir. D1 , 3-boyutlu dual Lorentz uzayında bir çokkürenin birbirine göre bir parametreli küresel hareketinin ivmeleri, ivme merkezleri,ivme eksenleri ve bunlarla ilgili teoremler elde edilmiştir.This thesis consists of six chapters. First chapter is devoted to the introduction.Second chapter deals with the concepts, definitions and necessary theorems.Third chapter focuses on the one parameter motion of the surfaces of the sphereswith the same center and that move accordingly, in the 3-dimensional Euclid space,E3 . Besides, canonical relative system and the pole points are described.Fourth chapter focuses on the one parameter motion of the dual surfaces of thespheres with the same center and that move accordingly, in the 3-dimensional dualspace, D3 . Besides, canonical relative system and the pole points are described.Fifth and sixth chapters are the original part of the study.In chapter five we have obtained the one parameter motion of the spherical surfaceswith the same center and that move according to each other, in the 3-dimensionalLorentz space, L3 as well as canonical relative system and the pole points.Furthermore, the accelerations, acceleration centers, acceleration axes of oneparameter spherical motions of many spheres, which are moving relative to eachother in the 3-dimensional Lorentz space, L3 and some theorems related to these areobtained.In chapter six we have obtained the one parameter motion of the dual sphericalsurfaces with the same center and that move relative to each other, in the 3-3dimensional dual Lorentz space, D1 as well as canonical relative system.Furthermore, the accelerations, acceleration centers, acceleration axes of oneparameter spherical motions of many spheres, which are moving relative to each3other in the 3-dimensional dual Lorentz space, D1 and some theorems related tothese are obtained

COMPARISON OF KNOWLEDGE LEVELS OF SWIMMING COACHES ABOUT DOPING AND ERGOGENIC AIDS

Most athletes consider their coaches as the most important source of information on nutrition and doping. The aim of this study was to determine the level of knowledge of swimming coaches about doping and ergogenic aids. Method: This study consisted of 148 randomly selected swimming coaches educated in the development Seminar of Swimming Coaches of Rize Ministry of Youth and Sports between April 23-27, 2019. The survey prepared by taking expert opinion. It totally consists of 19 items, 9 of which aim to determine demographic information and 10 of them to determine doping knowledge level. Frequency (f), percentage (%), chi-square test, independent sample t-test and one-way analysis of variance (ANOVA) used for data analysis. Results and discussion: According to the results of the study, when the participants' coaching experience and degree of coaching certificate were compared with the other variables, a statistically significant difference was found (p <0.05) but there was no significant difference between the other variables (p> 0.05). According to the results of the study, it is unclear to what extent the participants who have more coaching experience transfer information to their athletes despite the high level of knowledge about doping and ergogenic aids. In addition, it is thought that the education given in doping and ergogenic aid in universities is insufficient.  Article visualizations

A Note on Gershgorin Disks in the Elliptic Plane

In this study, we derive Gershgorin discs of elliptic complex matrices in the elliptic plane. Also, we investigate the location of the zeros of an elliptic complex valued polynomial with the help of Gershgorin discs of elliptic complex matrices. To prove the authenticity of our results and to distinguish them from existing ones, some illustrative examples are also given. Elliptic complex numbers are a generalized form of complex and so real numbers. Thus, the obtained results extend, generalize and complement some known Gershgorin discs results from the literature

Multicenter study of pars plana vitrectomy for optic disc pit maculopathy: MACPIT study

Purpose To evaluate surgical intervention with pars plana vitrectomy (PPV) for correction of optic disc pit maculopathy (ODP-M). Patients and methods Retrospective chart review from 13 centres of 51 eyes of 50 patients with ODP-M who underwent PPV between 2002-2014. Anatomic and final best-corrected visual acuity (BCVA) outcomes were evaluated for all cases with different adjuvant techniques. Results There were 23 males and 27 females with median age 25.5 (6-68) years. Preoperative median foveal thickness was 694.5 (331-1384) mu m and improved to 252.5 (153-1405) mu m. Median BCVA improved from 20/200 (20/20000 to 20/40) to 20/40 (20/2000 to 20/20) with 20/40 or better in 31 eyes. Complete retinal reattachment was achieved in 44 eyes (86.3%) at 7.1 (5.9) months. The good surgical outcomes were achieved in different adjuvant groups. Median follow-up was 24 (6 to 120) months. Conclusions These results confirm the long-term effectiveness of PPV for ODP-M. Prospective studies are needed to determine the effectiveness of any adjuvant technique in improving the success of PPV for ODP-M

Controversy and Consensus on Indications for Sperm DNA Fragmentation Testing in Male Infertility: A Global Survey, Current Guidelines, and Expert Recommendations

Purpose: Sperm DNA fragmentation (SDF) testing was recently added to the sixth edition of the World Health Organization laboratory manual for the examination and processing of human semen. Many conditions and risk factors have been associated with elevated SDF; therefore, it is important to identify the population of infertile men who might benefit from this test. The purpose of this study was to investigate global practices related to indications for SDF testing, compare the relevant professional society guideline recommendations, and provide expert recommendations. Materials and Methods: Clinicians managing male infertility were invited to take part in a global online survey on SDF clinical practices. This was conducted following the CHERRIES checklist criteria. The responses were compared to professional society guideline recommendations related to SDF and the appropriate available evidence. Expert recommendations on indications for SDF testing were then formulated, and the Delphi method was used to reach consensus. Results: The survey was completed by 436 experts from 55 countries. Almost 75% of respondents test for SDF in all or some men with unexplained or idiopathic infertility, 39% order it routinely in the work-up of recurrent pregnancy loss (RPL), and 62.2% investigate SDF in smokers. While 47% of reproductive urologists test SDF to support the decision for varicocele repair surgery when conventional semen parameters are normal, significantly fewer general urologists (23%; p=0.008) do the same. Nearly 70% would assess SDF before assisted reproductive technologies (ART), either always or for certain conditions. Recurrent ART failure is a common indication for SDF testing. Very few society recommendations were found regarding SDF testing. Conclusions: This article presents the largest global survey on the indications for SDF testing in infertile men, and demonstrates diverse practices. Furthermore, it highlights the paucity of professional society guideline recommendations. Expert recommendations are proposed to help guide clinicians

Technical aspects and clinical limitations of sperm DNA fragmentation testing in male infertility: A global survey, current guidelines, and expert recommendations

Purpose Sperm DNA fragmentation (SDF) is a functional sperm abnormality that can impact reproductive potential, for which four assays have been described in the recently published sixth edition of the WHO laboratory manual for the examination and processing of human semen. The purpose of this study was to examine the global practices related to the use of SDF assays and investigate the barriers and limitations that clinicians face in incorporating these tests into their practice. Materials and Methods Clinicians managing male infertility were invited to complete an online survey on practices related to SDF diagnostic and treatment approaches. Their responses related to the technical aspects of SDF testing, current professional society guidelines, and the literature were used to generate expert recommendations via the Delphi method. Finally, challenges related to SDF that the clinicians encounter in their daily practice were captured. Results The survey was completed by 436 reproductive clinicians. Overall, terminal deoxynucleotidyl transferase deoxyuridine triphosphate Nick-End Labeling (TUNEL) is the most commonly used assay chosen by 28.6%, followed by the sperm chromatin structure assay (24.1%), and the sperm chromatin dispersion (19.1%). The choice of the assay was largely influenced by availability (70% of respondents). A threshold of 30% was the most selected cut-off value for elevated SDF by 33.7% of clinicians. Of respondents, 53.6% recommend SDF testing after 3 to 5 days of abstinence. Although 75.3% believe SDF testing can provide an explanation for many unknown causes of infertility, the main limiting factors selected by respondents are a lack of professional society guideline recommendations (62.7%) and an absence of globally accepted references for SDF interpretation (50.3%). Conclusions This study represents the largest global survey on the technical aspects of SDF testing as well as the barriers encountered by clinicians. Unified global recommendations regarding clinician implementation and standard laboratory interpretation of SDF testing are crucial

Controversy and consensus on the management of elevated sperm DNA fragmentation in male infertility: A global survey, current guidelines, and expert recommendations

Purpose Sperm DNA fragmentation (SDF) has been associated with male infertility and poor outcomes of assisted reproductive technology (ART). The purpose of this study was to investigate global practices related to the management of elevated SDF in infertile men, summarize the relevant professional society recommendations, and provide expert recommendations for managing this condition. Materials and Methods An online global survey on clinical practices related to SDF was disseminated to reproductive clinicians, according to the CHERRIES checklist criteria. Management protocols for various conditions associated with SDF were captured and compared to the relevant recommendations in professional society guidelines and the appropriate available evidence. Expert recommendations and consensus on the management of infertile men with elevated SDF were then formulated and adapted using the Delphi method. Results A total of 436 experts from 55 different countries submitted responses. As an initial approach, 79.1% of reproductive experts recommend lifestyle modifications for infertile men with elevated SDF, and 76.9% prescribe empiric antioxidants. Regarding antioxidant duration, 39.3% recommend 4–6 months and 38.1% recommend 3 months. For men with unexplained or idiopathic infertility, and couples experiencing recurrent miscarriages associated with elevated SDF, most respondents refer to ART 6 months after failure of conservative and empiric medical management. Infertile men with clinical varicocele, normal conventional semen parameters, and elevated SDF are offered varicocele repair immediately after diagnosis by 31.4%, and after failure of antioxidants and conservative measures by 40.9%. Sperm selection techniques and testicular sperm extraction are also management options for couples undergoing ART. For most questions, heterogenous practices were demonstrated. Conclusions This paper presents the results of a large global survey on the management of infertile men with elevated SDF and reveals a lack of consensus among clinicians. Furthermore, it demonstrates the scarcity of professional society guidelines in this regard and attempts to highlight the relevant evidence. Expert recommendations are proposed to help guide clinicians