Neutralino Dark Matter and Other LHC Predictions from Quasi Yukawa Unification

We explore the dark matter and LHC implications of t-b-tau quasi Yukawa unification in the framework of supersymmetric models based on the gauge symmetry G=SU(4)_{c}\times SU(2)_{L}\times SU(2)_{R}. The deviation from exact Yukawa unification is quantified by a dimensionless parameter C (|C| <~ 0.2), such that the Yukawa couplings at M_GUT are related by y_t:y_b:y_tau=|1+C| : |1-C| : |1+3C|. In contrast to earlier studies which focused on universal gaugino masses, we consider non-universal gaugino masses at M_GUT that are compatible with the gauge symmetry G. We perform two independent scans of the fundamental parameter space, one of which employs ISAJET, while the other uses SoftSusy interfaced with SuperIso. These scans reveal qualitatively similar allowed regions in the parameter space, and yield a variety of neutralino dark matter scenarios consistent with the observations. These include stau and chargino coannihilation scenarios, the A-resonance scenario, as well as Higgsino dark matter solution which is more readily probed by direct detection searches. The gluino mass is found to be ~ 2 TeV, while the first two family squarks and sleptons are of order 4-5 TeV and 3 TeV respectively

Generalized Soft Breaking Leverage for the MSSM

In this work we study implications of additional non-holomorphic soft breaking terms (mu', A'_t, A'_b and A'_tau) on the MSSM phenomenology. By respecting the existing bounds on the mass measurements and restrictions coming from certain B-decays, we probe reactions of the MSSM to these additional soft breaking terms. We provide examples in which some slightly excluded solutions of the MSSM can be made to be consistent with the current experimental results. During this, even after applying additional fine-tuning constraints the non-holomorphic terms are allowed to be as large as hundreds of GeV. Such terms prove that they are capable of enriching the phenomenology and varying the mass spectra of the MSSM heavily, with a reasonable amount of fine-tuning. We observe that higgsinos, the lightest stop, the heavy Higgs boson states A, H, charged H, sbottom and stau exhibit the highest sensitivity to the new terms. We also show how the light stop can become nearly degenerate with top quark using these non-holomorphic terms.Comment: 21 pages, 9 figure

Multi-Objective Optimization of Microgrids Based on Recent Metaheuristic Methods

As the technology develops in the modern world, the need for electrical energy has increased. Renewable energy sources have emerged as an alternative energy source to fossil energy sources. Micro grids are the hybrid energy sources for both renewable and non-renewable energy sources. The choice of the microgrid depends on meeting the supply and low cost requirements while avoiding environmental pollution. Therefore, emission, reliability and sizing of a micro grid have been investigated in the present study. In addition, Swallow Swarm Optimization (SSO) and Hybrid Particle Swallow Swarm Optimization (HPSSO) algorithms were not found in micro grid related optimization studies. Performance of SSO and HPSSO algorithms was also evaluated. Particle Swarm Optimization (PSO), SSO, and HPSSO were adjusted in this study as multi-objective optimization method for increasing the reliability, decreasing emission and sizing energy resources of a microgrid feeding a 10 MW residence. A microgrid consisting of 8 MW solar panel, 4,5 MW wind turbine, 15 MW diesel generator, and 4 MW battery has been taken into consideration. The efficiencies of these algorithms were compared for different iterations and populations. In this study, the best results were obtained with the SSO algorithm. Loss of power supply probability (LPSP) = 0, Renewable factor (RF) = 1, with this algorithm our micro-grid has achieved a safe energy and minimum emission to feed the residence. In addition, a system that connects and disconnects the energy resources in varying load conditions was actualized with the SSO algorithm. With this algorithm LPSP = 0, RF = 1, Psize = 0,001. Maximum reliability, zero emission and minimum sizing of the energy sources in our microgrid were achieved with loads of up to 50%. Moreover, LPSP = 0.39, RF = 0.086, Psize = 0,21 values were obtained for loads 50% and above and good results were obtained for reliability, emission and sizing of energy sources

Volume 49, 2010, Number 2

In this study, the strength properties of polypropylene (PP)-fibre-reinforced fly-ash concrete were investigated experimentally and statistically. Three control factors (amount of fly ash, amount of PP fibre and curing time) were used for this study. The fly ash content that was used was 0, 60 and 120 kg/m(3) and the fibre content was 0, 0.45. 0.90 and 1.80 kg/m(3). The specimens were cured in standard curing conditions at temperature 23 +/- 2 degrees C for periods of 7, 28, 90 and 365 days. At the end of the curing period, the average of three specimens was tested to measure each of the concrete strength properties (compressive strength, flexural tensile strength and splitting tensile strength). Furthermore, the level of importance of these parameters on the strength properties was determined by rising the analysis of variance (Anova) method

Performance Analysis of Eulerian Colour and Motion Magnification Techniques

Bu çalışmasında, insan gözü tarafından algılanması zor olan bir görüntüdeki, gizli renk ve hareket değişimlerini açığa çıkarmada kullanılan görüntü büyütme yöntemlerinin performans analizi yapılmıştır. Bu analiz işleminde, görüntü büyütme yöntemi olarak Euler renk büyütme ve Euler hareket büyütme yöntemleri kullanılmıştır. Her iki görüntü büyütme yönteminde, görüntü ayrıştırma yöntemi olarak hem Laplace piramidi hem de Gauss piramidi kullanılmış ve bu piramitlerin performansları karşılaştırılmıştır. Tüm piramit ayrıştırmalarından elde edilen çıkış görüntüleri hesapsal olarak analiz edilir ve PSNR (En Büyük İşaret-Gürültü Oranı) ve SSIM (Yapısal Benzerlik İndeksi Ölçümü) değerleri üzerinden birbirleriyle karşılaştırılır. Görüntü işleme zamanı, görüntü ayrıştırma yöntemlerini karşılaştırmada kullanılan bir parametredir. Görüntü ayrıştırma yöntemleriyle yapılan deneylerin sonuçları görüntü işleme zamanı açısından incelendiğinde, Gauss piramit ayrıştırmasıyla görüntü büyütmenin daha iyi bir performansa sahip olduğu görülmüştür. Bu yöntemler görüntü kalitesi olarak PSNR değerleri açısından incelendiğinde, Gauss piramidinin renk büyütme işleminde daha iyi sonuçlar verdiği Laplace piramidinin ise hareket büyütme işleminde daha iyi sonuçlar verdiği görülmüştür.In this study, performance analysis of the video magnification techniques which are used to reveal subtle variations of colour and motions in a video that are difficult to perceive with the human eye was achieved. In the analysis process, Eulerian colour magnification and Eulerian motion magnification techniques have been used as video magnification technique. In both video magnification techniques, both Laplacian pyramid and Gaussian pyramid have been used as video decomposition technique and the performances of these pyramids have been compared. The output videos that were obtained from all pyramid decompositions are computationally analyzed and compared with each other through PSNR (Peak Signal-to-Noise Ratio) and SSIM (Structural Similarity Index Measurement) values. The video processing time is a parameter which is used to compare with video decomposition techniques. When the results of the experiments that are done with video decomposition tecniques investigated in terms of video processing time, it was seen that video magnification with Gauss pyramid decomposition has a better performance. When these techniques investigated in terms of PSNR values as video quality, it was seen that while Gauss pyramid gives a better result in colour magnification process, Laplace pyramid gives a better result in motion magnification process

GÜNDEM BELİRLEME VE ÇERÇEVELEME TEORİLERİ BAĞLAMINDA TASS VE UKRİNFORM HABER AJANSLARININ RUSYA-UKRAYNA SAVAŞ SUNUMLARININ İNCELENMESİ

ÖZ: Gündem belirleme teorisi, haber medyasında sıklıkla tekrarlanarak öne çıkarılan konuların ve bu konuların anlatım tarzlarının kamuoyu, medya ve siyaset gündemlerini etkileyebildiğini ileri sürmektedir. Bu tez, alanda yapılmış çalışmalarla defalarca doğrulanmıştır. Gündem belirleme, çerçeveleme teorisiyle birlikte, medya etkilerinin en önemli teorilerindendir. Bu teoriler haber medyasında gündem konularının seçilerek oluşturulduğunu vurgulamaktadır. Seçilerek aktarılan kamu sorunları veya özenle hikâyeleştirilen diğer herhangi bir haber nesnesi, kamuoyunun olay ve olgulara ilişkin bakışını şekillendirebilmektedir. Bu çalışmada, haber medyasının en tepesinde yer alan haber ajanslarının Rusya-Ukrayna savaşını sunumları gündem belirleme ve çerçeveleme teorileri kapsamında araştırılmıştır. Rus haber ajansı TASS ve Ukrayna haber ajansı Ukrinform savaşan ülkelere ait ajanslar olarak seçilmiştir. Savaşın ilk günü yayınladıkları ilk yüz haber incelenmiştir. Araştırmada içerik analizi yöntemi kullanılmıştır. Analizler sonucunda, ajansların savaşla ilgili konuları farklı hikâyelerle aktardıkları tespit edilmiştir. ABSTRACT: Agenda setting theory argues that the frequently repeated issues in the news media and their narrative styles can affect the public, media and political agendas. This thesis has been repeatedly confirmed by studies in the field. Agenda setting, together with the framing theory, is one of the most important theories of media effects. These theories emphasize that the agenda topics in the news media are formed by selection. Selected public issues or any other news object carefully narrated can shape the public's view of events and phenomena. In this study, the presentations of the Russia-Ukraine war by the news agencies at the top of the news media were investigated within the scope of agenda setting and framing theories. The Russian news agency TASS and the Ukrainian news agency Ukrinform were chosen as the agencies of the warring countries. The first hundred news published on the first day of the war were examined. Content analysis method was u1 sed in the research. As a result of the analysis, it was determined that the agencies conveyed the war-related issues with different stories

Effect of cooling methods on residual compressive strength and cracking behaviour of fly ash concretes exposed at elevated temperatures

This paper presents the effects of cooling methods on residual compressive strength and cracking behavior of concretes containing four different class F fly ash contents of 10%, 20%, 30% and 40% as partial replacement of cement at various elevated temperatures. The residual compressive strength of the aforementioned fly ash concretes is measured after being exposed to 200, 400, 600 and 800 °C temperatures and two different cooling methods, for example, slow cooling and rapid water cooling. Results show that the residual compressive strengths of all fly ash concretes decrease with increase in temperatures irrespective of cooling regimes, which is similar to that of ordinary concrete. Generally, control ordinary concrete and all fly ash concretes exhibited between 10% and 35% more reduction in residual compressive strength because of rapid cooling than slow cooling except few cases. Cracks are observed over concrete specimens after being exposed to temperatures ranging from 400 to 800 °C. Samples that are slowly cooled developed smaller cracks than those rapidly cooled. At 800 °C, all fly ash concretes that are exposed to rapid cooling showed the most severe cracking. X-ray diffraction analysis shows reduction of Ca(OH)2 peak and formation of new calcium silicate peak in concretes containing 20% and 40% fly ash when subjected to 800 °C in both cooling methods. Thermo gravimetric analysis and differential thermal analysis results show increase in thermal stability of concrete with increase in fly ash contents. The existing Eurocode also predicted the compressive strength of fly ash concretes with reasonable accuracy when subjected to the aforementioned elevated temperatures and cooling methods