1,109 research outputs found

    Brane solitons of (1,0) superconformal theories in six dimensions with hypermultiplets

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    We solve the Killing spinor equations of 6-dimensional (1,0) superconformal theories which include hyper-multiplets in all cases. We show that the solutions preserve 1,2,3,4 and 8 supersymmetries. We find models with self-dual string solitons which are smooth and supported by instantons with an arbitrary gauge group, and 3-brane solitons as expected from the M-brane intersection rules.Comment: 13 page

    Spinorial geometry, horizons and superconformal symmetry in six dimensions

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    The spinorial geometry method of solving Killing spinor equations is reviewed as it applies to 6-dimensional (1,0) supergravity. In particular, it is explained how the method is used to identify both the fractions of supersymmetry preserved by and the geometry of all supersymmetric backgrounds. Then two applications are described to systems that exhibit superconformal symmetry. The first is the proof that some 6-dimensional black hole horizons are locally isometric to AdS3×Σ3AdS_3\times \Sigma^3, where Σ3\Sigma^3 is diffeomeorphic to S3S^3. The second one is a description of all supersymmetric solutions of 6-dimensional (1,0) superconformal theories and in particular of their brane solitons.Comment: 51 pages, accepted for publication in CQG, additional references adde

    Environmental urbanization assessment using gis and multicriteria decision analysis: a case study for Denizli (Turkey) municipal area

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    In recent years, life quality of the urban areas is a growing interest of civil engineering. Environmental quality is essential to display the position of sustainable development and asserts the corresponding countermeasures to the protection of environment. Urban environmental quality involves multidisciplinary parameters and difficulties to be analyzed. The problem is not only complex but also involves many uncertainties, and decision-making on these issues is a challenging problem which contains many parameters and alternatives inherently. Multicriteria decision analysis (MCDA) is a very prepotent technique to solve that sort of problems, and it guides the users confidence by synthesizing that information. Environmental concerns frequently contain spatial information. Spatial multicriteria decision analysis (SMCDA) that includes Geographic Information System (GIS) is efficient to tackle that type of problems. This study has employed some geographic and urbanization parameters to assess the environmental urbanization quality used by those methods. The study area has been described in five categories: very favorable, favorable, moderate, unfavorable, and very unfavorable. The results are momentous to see the current situation, and they could help to mitigate the related concerns. The study proves that the SMCDA descriptions match the environmental quality perception in the city. © 2018 Erdal Akyol et al

    (1,0) superconformal theories in six dimensions and Killing spinor equations

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    We solve the Killing spinor equations of 6-dimensional (1,0) superconformal theories in all cases. In particular, we derive the conditions on the fields imposed by the Killing spinor equations and demonstrate that these depend on the isotropy group of the Killing spinors. We focus on the models proposed by Samtleben et al in \cite{ssw} and find that there are solutions preserving 1,2, 4 and 8 supersymmetries. We also explore the solutions which preserve 4 supersymmetries and find that many models admit string and 3-brane solitons as expected from the M-brane intersection rules. The string solitons are smooth regulated by the moduli of instanton configurations.Comment: 26 page

    Laparoscopic Ventral Mesh Fixation in Patients with Pelvic Organ Prolapse

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    Pelvic organ prolapse (POP) is a condition with a high incidence rate and often creates difficulties in surgical coloproctology and gynecology. The aim of this study was to evaluate the effectiveness of laparoscopic ventral reticular sacrocolporectopexy and sacrorectopexi in women and men with POP, respectively. This study was conducted at the Educational-Surgical Clinic of Azerbaijan Medical University and Department of Surgery of the Faculty of Medicine of Ankara University (2016-2019) on 21 patients with POP (15 women and 6 men). Results of diagnostics and surgical treatment of POP were studied with preferences towards endoscopic, radiation, and functional methods. The surgical methods used in these patients included laparoscopic fixation methods (sacrocolpopexy, sacrocolporectopexy) of protruding organs (uterus, vaginal vault/vaginal cuff, rectum) and simultaneous vaginal (colporrhaphy, colpolevatoroplasty, vaginal plastic surgery) and proctological surgeries (circulatory resection, hemorrhoidectomy, sphincteroplasty). The findings demonstrated that the most progressive POP mostly occurred in women of premenopausal age and during menopause. Based on the results of the long-term evaluation of the surgical treatment (6-12 months), the rates of recurrence of prolapse and complications were low (up to 4.8% and 9.5%, respectively) with favorable long-term functional results,  such as a decrease in the degree of fecal incontinence and constipation, observed in the evaluation. Due to the concomitant weakness of the ligamentous apparatus of the pelvic floor in these patients, there is the need for intra-abdominal apical support of organs. In conclusion, that laparoscopic sacrocolpopexy in women and sacrorectopexy in men are reliable surgical method to treat POP. However, specific skills need to be acquired by both gynecologist and coloproctologist to be able to do these laparoscopic surgery techniques

    Development of a community of inquiry in online and blended learning contexts

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    AbstractThis paper discusses findings of a mixed method research project with the goal to study the development of a community of inquiry in online and blended learning environments. A graduate course delivered online and blended format was the focus of the study. Data was gathered from the Community of Inquiry Survey and transcript analysis of online discussions to explore the developmental differences on each presence (social, teaching and cognitive). The results showed: significant differences on social and cognitive presence between two course formats and higher perceptions of the presences in blended course

    Acidulant Effect on Greening, Reducing Capacity, and Tryptophan Fluorescence of Sunflower Butter Cookie Dough During Refrigerated Storage

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    BACKGROUND: Sunflower seed derived butter can be a source of protein and phenolic antioxidants in refrigerated dough. Chlorogenic quinone-amino acid induced greening can however occur at alkaline pH, which could result in less bioavailable conjugated phenol-amino acids. Acidulants were tested as potential anti-greening ingredients in refrigerated chemically leavened cookie dough. Effect of refrigerated storage time, leavening agents and acidulants on tryptophan fluorescence (»ex=280nm, »em=300-500), color (hunter LAB), reducing capacity (DPPH and Folin-Ciocalteu reagent reducing capacity/FCRC), and hydroxycinnamic acids were measured. RESULTS: The pH range of acidified doughs was 4.83–6.98 compared to 7.65- 9.18 in nonacidified leavened doughs after 24 days. Greening was higher in baking soda dough control (a*=-0.54) than baking powder dough control (a*=2.98) after 24 days, attributed to higher pH (9.18) of the former compared to pH 7.14 in the later. Tryptophan fluorescence intensity in baking soda dough decreased in the order: control \u3e glucono-delta lactone H citric acid after 24 days. The DPPH and FCRC of acidified doughs were greater than corresponding control doughs. CONCLUSION: The use of acidulants would prevent greening in sunflower dough without lowering its phenolic concentration, making use of sunflower butter in refrigerated dough for baked goods feasible
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