238 research outputs found

    Production and Decays of WRW_R bosons at the LHC

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    With the advent of the LHC, it is important to devise clear tests for Physics Beyond the Standard Model. Such physics could manifest itself in the form of new charged bosons, whose presence is most naturally occurring in left-right symmetric models (LRSM). We analyze the single WRW_R boson production in an asymmetric left-right model, where the left and right quark mixing matrices are not constrained to be equal. We investigate the cross sections as well as branching ratios of WRW_R bosons at the LHC, including constraints from low energy phenomenology. We then look for most likely signals in ppWR tt (dijet)pp \to W_R\ t \to t ~(dijet) production. Including the background, we find that LHC could show significant signals for the new charged bosons. We compare our results throughout with the manifest left-right symmetric model and comment on similarities and differences.Comment: 22 pages, 9 figure

    Positive space: A curatorial project on HIV / AIDS

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    This thesis uses research-creation methodology which integrates an aesthetic component as an integral part of the study. In 2018, I curated a contemporary art exhibition on HIV/AIDS in Istanbul with the participation of dominantly local artists, and this exhibition lays the ground of my research on HIV/AIDS. This written component of the research-creation, as separate but co-composed with the exhibition, doesn’t accept that facing HIV/AIDS as a traumatic event is a pre-given and natural reaction, and it analyzes the traumatic construction of HIV/AIDS. During the 1980s, HIV/AIDS was experienced for the first time as a collective and transnational trauma, and, as I argue, the historical traumatic affect structured during this first crisis still has a crucial influence on the contemporary subject. Regardless of the medical progress which made it possible to repress the HI virus, traumatic post-memory challenges the contemporary experience of HIV/AIDS in myriad forms including stigma, phobia, denial, and willful ignorance. Not only people living with HIV/AIDS but also queers born after the 1980s, who are historically thought to be the most affected people and vectors of the virus, are experiencing HIV/AIDS as a predetermined and structured affect. The first part of this thesis analyzes Turkish media discourses on HIV/AIDS and homosexuality during the 1980s to provide a glimpse of the genealogy of the trauma construction. The second part is interested in analyzing and challenging the contemporary traumatic affect of HIV/AIDS through personal experiences and readings of the artworks exhibited in Positive Spac

    B Decays in an Asymmetric Left-Right Model

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    Motivated by recently observed disagreements with the SM predictions in BB decays, we study bd,sb \to d, s transitions in an asymmetric class of SU(2)L×SU(2)R×U(1)BLSU(2)_L \times SU(2)_R \times U(1)_{B-L} models, with a simple one-parameter structure of the right handed mixing matrix for the quarks, which obeys the constraints from kaon physics. We use experimental constraints on the branching ratios of bsγb \to s \gamma, bceνˉeb \to c e {\bar \nu}_e, and Bd,s0Bˉd,s0B_{d,s}^0 -\bar{B}^0_{d,s} mixing to restrict the parameters of the model: gR/gL,MW2,MH±,tanβ\displaystyle {g_R}/{g_L}, M_{W_2}, M_{H^\pm}, \tan \beta as well as the elements of the right-handed quark mixing matrix VCKMRV^R_{CKM}. We present a comparison with the more commonly used (manifest) left-right symmetric model. Our analysis exposes the parameters most sensitive to bb transitions and reveals a large parameter space where left- and right-handed quarks mix differently, opening the possibility of observing marked differences in behaviour between the standard model and the left-right model.Comment: 32 pages and 8 figure

    The role of supply chain in smes and evaluation of performance: Aydin application

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    Tedarik Zinciri süreci, birbiri ile iliskili birden çok alt süreçten olusan ve akıs yönü hammaddelerin elde edilip nihai ürüne çevrilmesinden, müsteriye teslimine doğru olan bir süreçtir. Tedarik zincirinin bir bütün olarak iyi yönetilmesi isletme performansını olumlu etkileyecektir. KOB?'ler esneklikleri ve yaratıcılık yetenekleri sayesinde, günümüz ekonomilerinde önemli bir yere sahiptirler. Günümüzde önemli bir stratejik araç haline gelmis olan tedarik zinciri ve tedarik zinciri yönetimi KOB?'lere, küresel ekonomilerde rekabet etmek için fırsatlar yaratabilmektedir. Tedarik Zinciri Yönetimi'nin KOB?'ler üzerine etkileri hakkında henüz görüs birliği olusmamıstır. Genel olarak tedarik zinciri yönetimi arastırmaları büyük ölçekli isletmelerin bakıs açısına göre düzenlenmistir. Bu çalısmada, Tedarik zinciri yönetiminin KOB?'ler üzerindeki etkileri, Aydın ili merkezinde faaliyet gösteren KOB?'lere uygulanan anket aracılığı ile ölçülmeye çalısılmıstır. Tedarik zinciri uygulamalarının tedarikçilerin performansı üzerine bir etkisi olmadığı sonucuna varılmıstır. Ancak, tedarikçilerin performansının isletmelerin ürün kalitesi ve operasyonel faaliyetlerini olumlu yönde etkilediği sonucuna varılmıstır Supply Chain process is a process consisting of interrelated sub processes and flowing through from acquisition of raw materials converted into final products to delivery to customer. Effective management of supply chain as a whole affects optimistically firm?s performance. Small and Medium Seized Enterprises (SMEs) have an important role due to their flexibility and creative abilities. Today, Supply Chain (SC) and Supply Chain Management (SCM) as strategic tools are able to give opportunities to the SMEs to compete globally. There is no consensus on the effects of SCM on SMEs. In general, studies on SCM have been conducted to consider large enterprises. In this study, effects of SMC on SMEs have been tried to measure by a survey administered on SMEs located at Aydın providence in Turkey. The empirical results have indicated that there is no significant relation between Supplier Performance and Supply Chain Practices. On the other hand, Supplier Performance has a significant impact on firm?s product quality and operational performance

    EXAMINATION OF THE PSYCHOLOGICAL PERFORMANCES OF THE CANDIDATES ENTERING THE SPORTS TESTS IN POLICE VOCATIONAL EDUCATION CENTERS

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    The purpose of this research is to examine the psychological performance levels of applicants, who prepared for sports tests in Police Vocational Education Centers in Kayseri. 427 applicants, who have been randomly selected, have voluntarily participated in the research. As data collection tools for the research, the Psychological performance Scale which was developed by Loehr J.E. and the Personal Information Form which was prepared by the researcher have been applied. The obtained data has been statistically analyzed via SPSS20.0 package program. The personal information of the applicants and the total score of inventory and total factor scores (f) and percent value have been determined and shown. To compare them with regarding gender the statistics of Mann-Whitney U test have been applied while statistical outputs of Kruskal Wallis test have been applied in order to make comparison with considering their Public Personnel Selection Examination (PPSE) scores, departments that they graduated, educational status of their parents and neighborhoods where they live. As a result of the statistical analyses; when the psychological performance levels of the applicants have been examined, there is no statistically significant difference in accordance with gender while there are statistically significant differences in accordance with (PPSE) scores, departments that they graduated, educational status of their parents and neighborhoods/residences where they live. Consequently, with considering psychological performance of applicants who prepare for sports tests of police vocational training centers it has been expected to contribute to making right choices. Policing is a profession in which the profession requires physical toughness as well as psychological performance. Therefore, in the entrance exams for police vocational education centers, applying psychological performance and psychological tests in addition to sports tests should be considered.  Article visualizations

    EXAMINATION OF THE PSYCHOLOGICAL PERFORMANCES OF THE CANDIDATES ENTERING THE SPORTS TESTS IN POLICE VOCATIONAL EDUCATION CENTERS

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    The purpose of this research is to examine the psychological performance levels of applicants, who prepared for sports tests in Police Vocational Education Centers in Kayseri. 427 applicants, who have been randomly selected, have voluntarily participated in the research. As data collection tools for the research, the Psychological performance Scale which was developed by Loehr J.E. and the Personal Information Form which was prepared by the researcher have been applied. The obtained data has been statistically analyzed via SPSS20.0 package program. The personal information of the applicants and the total score of inventory and total factor scores (f) and percent value have been determined and shown. To compare them with regarding gender the statistics of Mann-Whitney U test have been applied while statistical outputs of Kruskal Wallis test have been applied in order to make comparison with considering their Public Personnel Selection Examination (PPSE) scores, departments that they graduated, educational status of their parents and neighborhoods where they live. As a result of the statistical analyses; when the psychological performance levels of the applicants have been examined, there is no statistically significant difference in accordance with gender while there are statistically significant differences in accordance with (PPSE) scores, departments that they graduated, educational status of their parents and neighborhoods/residences where they live. Consequently, with considering psychological performance of applicants who prepare for sports tests of police vocational training centers it has been expected to contribute to making right choices. Policing is a profession in which the profession requires physical toughness as well as psychological performance. Therefore, in the entrance exams for police vocational education centers, applying psychological performance and psychological tests in addition to sports tests should be considered.  Article visualizations

    KAVRAMSAL SANAT PARADİGMASINDA ENSTRÜMAN YAPIMI VE POSTMODERN DUYSAL TASARIM ALANLARINA BİR YANSIMASI OLARAK SOUND SCULPTURE KAVRAMININ DÖNÜŞTÜRÜCÜ İZDÜŞÜMLERİ

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    Yapıt kurma edimi üzerinden sanat, zanaat ve tasarım gibi nosyonları türeten bireyler, bu kavramları merkezlerine alan farklı disiplinlerde olduğu gibi duysal bağlamın tasarı olanaklarını da keşfetmiş ve çeşitli uygulamalar üzerinden hayata dair nice derinlikli alımlama biçimleri deneyimlemişlerdir. Bu süreç, müzik/ses üretiminden bunları gerçekleştirecekleri araçlara; müziği icra edecekleri mekânların mimarisinden, bu performansları kayıt altına alacakları teknolojilere kadar izdüşümleriyle, özellikle 19. Yüzyılın son çeyreğinden itibaren, geniş bir alana yayılan duysal tasarım çalışmalarının plastik ve görsel sanatlarla sınırlarını muğlaklaştırmış, öğelerini geçişkenleştirmiştir. Fütüristlerin sıkça örneklenen; hız, zaman ve sesle ilişkilendirdikleri üretimleri, özellikle Russolo’nun Intonarumori’leriyle, sanatsal ses/enstrüman çalışmalarının erkence örneklerinden birini verdiği, The Art of Noise manifestosuyla pekiştirilmiş ve belgeleştirilmiştir. Keza, Duchamp’ın 20. Yüzyılın başında Sculpture Musicale, With Hidden Noise gibi Dadacı çalışmaları Sound Object, Sound Sculpture, Sound Art gibi alanların tanımlanması bakımından öncü niteliktedir. Aynı yüzyılın ortalarındaysa sosyoekonomik gelişmelere koşut, yeni teknolojiler ve kavramsal arka plan üzerinden sanatsal ses çalışmalarının tanımı ve sınırları daha da genişlemiştir. II. Dünya Savaşı sonrasında birçok alanda olduğu gibi müzik ve ses pratiklerinde de önemli dönüşümler gerçekleşmiş; bu alanların kavramsal boyutları tartışmaya açılmıştır. Özellikle 1960’lardan sonra Postmodernizmin de etkisiyle sound kavramı, yeni üretim ve malzeme teknolojileriyle dönüşümler deneyimleyen enstrüman tasarım alanlarıyla yepyeni boyutlar kazanmış, peşi sıra yeni önermelerine kavuşmuştur. Nitel araştırma yöntemleri kullanılarak hazırlanan bu derleme makalede; deneysellikle başlayan enstrüman tasarım alanlarıyla içli dışlı ve birbirlerine koşut ilerleyen, zamanla duysal tasarım alanının müstakil bir üretim alanına evirilen, Sound Sculpture türünün gelişimi; 20. ve 21. Yüzyıl çağdaş sanat akımları içerisindeki konumu, kavramsal arka planı, başat önermeleri üzerinden incelenmektedir. Bu çalışmada aynı zamanda gelenekselleşen enstrüman yapım pratiklerine koşut, deneysel ve kavramsal bir enstrüman yapım alanı olan Sound Sculpture türü alternatif bir öneri olarak sunulmaktadır

    Monitoring of acid mine lakes by Unmanned Aerial Vehicle (UAV) on Geographic Information System (GIS) around Can Region, Biga Peninsula, NW Turkey

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    The 8th International Symposium on Eastern Mediterranean Geology, 13-17 October 2014 / Muğla Sıtkı Koçman University, TurkeyIn the past three decades, a few small scale private enterprises have been operating around Can Region, Biga Peninsula, NW Turkey which is rich in lignite reserves. They have abandoned the operation land without providing any working of rehabilitation. during the operation of high sulfur content lignite, the topography have been damaged and this caused the large holes and deterioration in these areas. As a result of discharge of surface water the artificial lakes have been formed. In the course of the time, these lakes gain acidic character due to acid generation from pyrite oxidation. Significantly high acidity with low pH values ranging from 2.53 to 3.05 is recorded from AMLs

    Frequency in the anomalous origin of the left main coronary artery with angiography in a Turkish population.

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    We estimated the frequency of anatomic variations in origin of the left coronary artery in a Turkish population by analyzing the angiographic data of 10,042 consecutive adult patients undergoing coronary angiography. Among 10,042 adult patients, 5 (0.04%) patients (4 men and 1 woman, age range 40-74, median 58 years old) had anomalous origin of the left main coronary artery. The left main coronary artery arose from the right coronary sinus of Valsalva in 2 (0.019%) patients (both of them had a retro-aortic course), from above the left coronary sinus of Valsalva in 2 (0.019%) patients, and from above the non-coronary (posterior)-left coronary commisure in 1 (0.009%) patient. Anomalous origin of the left main coronary artery is potentially a serious condition, as it can lead to myocardial infarction and sudden cardiac death under physical exertion. Therefore, greater effort for early detection and surgical repair of this anomaly are warranted. The angiographic recognition of anomalous origin of this vessel may prove useful for physicians dealing with diagnosis and treatment of anomalies of the left main coronary artery.</p

    Znaczenie badania krwi pobranej z żył tarczowych górnych i dolnych w rozpoznawaniu raka tarczycy

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    Introduction: We aimed to determine whether levels of thyroglobulin measured in blood from the inferior-superior thyroid veins and the peripheral antecubital vein could predict the presence of thyroid carcinoma in patients undergoing surgery for thyroid diseases. Material and methods: Sixty-one patients were prospectively enrolled in the study. Levels of thyroglobulin were analysed. Sensitivity, specificity, positive predictive values (PPV) and negative predictive values (NPV) of these markers were investigated. Results: Twenty-six out of 61 patients (42.6%) with malignancy were diagnosed. The levels of thyroglobulin in the inferior-superior thyroid veins were higher than those in the peripheral antecubital vein (p = 0.001). The levels of thyroglobulin in the blood taken from the antecubital vein and the inferior-superior thyroid veins did not differ between benign and malignant thyroid disorders. For thyroglobulin, sensitivity was 33.3%, specificity 60.6%, PPV 27.8%, and NPV 66.7% respectively. Conclusion: Thyroglobulin levels in the antecubital vein compared to the inferior-superior thyroid veins were not significant either in benign or malignant disorders.Wstęp: Celem badania było ustalenie, czy oznaczenie stężeń tyreoglobuliny we krwi pobranej z żył tarczowych górnych i dolnych oraz z żyły przedłokciowej ma wartość prognostyczną w wykrywaniu nowotworów tarczycy u chorych poddawanych zabiegom chirurgicznym z powodu chorób tarczycy. Materiał i metody: Do tego prospektywnego badania włączono 61 chorych. Analizowano wartości stężeń tyreoglobuliny. Badano czułość, swoistość oraz wartość prognostyczną dodatnią (PPV) i ujemną (NPV) tych wskaźników. Wyniki: U 26 spośród 61 chorych (42,6%) rozpoznano chorobę nowotworową. Stężenia tyreoglobuliny w żyłach tarczowych dolnych i górnych były wyższe niż stężenia mierzone we krwi pobranej z żyły przedłokciowej (p = 0,001). Stężenia tyreoglobuliny w próbkach krwi pobranych z żyły przedłokciowej i żył tarczowych nie różniły się istotnie między osobami z łagodnymi i złośliwymi guzami tarczycy. Oznaczenie tyreoglobuliny cechowało się czułością wynoszącą 33,3%, swoistością równą 60,6%, PPV &#8212; 27,8% i NPV &#8212; 66,7%. Wnioski: Porównanie stężeń tyreoglobuliny w żyle przedłokciowej i w żyłach tarczowych górnych i dolnych nie miało istotnego znaczenia diagnostycznego w wykrywaniu zarówno zmian łagodnych, jak i złośliwych
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