Relationship between resilience and academic success in dental students of Shahid Beheshti University of Medical Sciences, 2015-16

Background and Aim: Understanding the relationship of some personality traits such as resilience with academic and career success could be helpful. Therefore, this research aims to investigate such a relationship in dentistry students, one of the most stressful professions of medical sciences.Materials and Methods: A total of 185 dental students from Shahid Beheshti University of Medical Sciences participated in this cross-sectional non-experimental correlation study through convenience sampling. The Conner-Davidson  questionnaire was filled out to assess the resilience of students and theaverage score of the final test of basic science was considered as the criterion for measuring the academic success. Data analysis was carried out through logistic regression and chi-square test. All stages of this research were conducted ethically. The subject of study was explained to students, and they were includedin the study after accepting and obtaining oral satisfaction.Results: The relationship between resilience score with basic science score as a criterion for academic success showed a positive and direct correlation. The median of the resilience score was 62.27. The minimum and maximum resilience scores were 21 and 91, respectively. About 82.7% got a basic science score of > 120 (successful) and 12% got a basic science score of < 120 (not successful).Conclusion: The results of this study can be very useful for educational planners, especially in Shahid Beheshti University of Medical Sciences. The current curriculum of dentistry primarily focuses on profession competencies as a decisive factor in academic success, while some personality traits are directly related to academic success. Therefore, there is no doubt about the necessity of changing and refining educational programs towards the development of personality dimensions affecting the nature and professional conduct.Keywords: Resilience, Academic success, Dental student

Clustering on very small scales from a large sample of confirmed quasar pairs: Does quasar clustering track from Mpc to kpc scales?

We present the most precise estimate to date of the clustering of quasars on very small scales, based on a sample of 47 binary quasars with magnitudes of $g<20.85$ and proper transverse separations of $\sim 25\,h^{-1}$\,kpc. Our sample of binary quasars, which is about 6 times larger than any previous spectroscopically confirmed sample on these scales, is targeted using a Kernel Density Estimation technique (KDE) applied to Sloan Digital Sky Survey (SDSS) imaging over most of the SDSS area. Our sample is "complete" in that all of the KDE target pairs with $17.0 \lesssim R \lesssim 36.2\,h^{-1}$\,kpc in our area of interest have been spectroscopically confirmed from a combination of previous surveys and our own long-slit observational campaign. We catalogue 230 candidate quasar pairs with angular separations of <8\arcsec, from which our binary quasars were identified. We determine the projected correlation function of quasars ($\bar W_{\rm p}$) in four bins of proper transverse scale over the range $17.0 \lesssim R \lesssim 36.2\,h^{-1}$\,kpc. The implied small-scale quasar clustering amplitude from the projected correlation function, integrated across our entire redshift range, is $A=24.1\pm3.6$ at $\sim 26.6 ~h^{-1}$\,kpc. Our sample is the first spectroscopically confirmed sample of quasar pairs that is sufficiently large to study how quasar clustering evolves with redshift at $\sim 25 ~h^{-1}$ kpc. We find that empirical descriptions of how quasar clustering evolves with redshift at $\sim 25 ~h^{-1}$ Mpc also adequately describe the evolution of quasar clustering at $\sim 25 ~h^{-1}$ kpc.Comment: 16 pages, 8 figures, 6 tables, Accepted for publication in MNRA

SELF-FORCE AND NOISE-KERNEL IN CURVED SPACE-TIME USING QUASI-LOCAL EXPANSION METHODS

We find a quasi-local expansion for the tail term of the Green's function for a particle with scalar charge moving outside the event horizon of a black hole of mass M. To do that we use a WKB-like ansatz for the mode functions and we solve the resulted differential equation by iteration. We then sum the mode contributions using Plana sum rule. The fact that we find the tail term as an analytic expression is important. We then use our expressions to calculate the self-force exerted upon a particle of scalar charge that has been held at rest from infinite past to some time after which it moves on a general geodesic of the space-time. We perform this computation first for the radial path of a particle released from rest and then generalize the method for a particle launched on a general geodesic. We then turn to computing the noise kernel. The problem we are primarily concerned with is that of a massless, conformally coupled scalar field in the optical Schwarzschild (the ultrastatic spacetime conformal to the Schwarzschild black hole). In contrast to previous work done on this topic, we keep the two points separate, and as a result work with non-renormalized Wightman functions. We give an expression in terms of an expansion in coordinate separation and conclude with an outlook

Self-force on a scalar charge in radial infall from rest using the Hadamard-WKB expansion

We present an analytic method based on the Hadamard-WKB expansion to calculate the self-force for a particle with scalar charge that undergoes radial infall in a Schwarzschild spacetime after being held at rest until a time t = 0. Our result is valid in the case of short duration from the start. It is possible to use the Hadamard-WKB expansion in this case because the value of the integral of the retarded Green's function over the particle's entire past trajectory can be expressed in terms of two integrals over the time period that the particle has been falling. This analytic result is expected to be useful as a check for numerical prescriptions including those involving mode sum regularization and for any other analytical approximations to self-force calculations.Comment: 22 pages, 2 figures, Physical Review D version along with the corrections given in the erratu

Dynamical origin of the ⋆θ\star_\theta-noncommutativity in field theory from quantum mechanics

We show that introducing an extended Heisenberg algebra in the context of the Weyl-Wigner-Groenewold-Moyal formalism leads to a deformed product of the classical dynamical variables that is inherited to the level of quantum field theory, and that allows us to relate the operator space noncommutativity in quantum mechanics to the quantum group inspired algebra deformation noncommutativity in field theory.Comment: 17 pages, to be published in Phys. Lett.

رابطه تاب آوری با موفقیت تحصیلی در دانشجویان دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی 95-1394

Background and Aim: Understanding the relationship of some personality traits such as resilience with academic and career success could be helpful. Therefore, this research aims to investigate such a relationship in dentistry students, one of the most stressful professions of medical sciences.Materials and Methods: A total of 185 dental students from Shahid Beheshti University of Medical Sciences participated in this cross-sectional non-experimental correlation study through convenience sampling. The Conner-Davidson&nbsp; questionnaire was filled out to assess the resilience of students and theaverage score of the final test of basic science was considered as the criterion for measuring the academic success. Data analysis was carried out through logistic regression and chi-square test. All stages of this research were conducted ethically. The subject of study was explained to students, and they were includedin the study after accepting and obtaining oral satisfaction.Results:&nbsp;The relationship between resilience score with basic science score as a criterion for academic success showed a positive and direct correlation. The median of the resilience score was 62.27. The minimum and maximum resilience scores were 21 and 91, respectively. About 82.7% got a basic science score of &gt; 120 (successful) and 12% got a basic science score of &lt; 120 (not successful).Conclusion:&nbsp;The results of this study can be very useful for educational planners, especially in Shahid Beheshti University of Medical Sciences. The current curriculum of dentistry primarily focuses on profession competencies as a decisive factor in academic success, while some personality traits are directly related to academic success. Therefore, there is no doubt about the necessity of changing and refining educational programs towards the development of personality dimensions affecting the nature and professional conduct.زمینه و اهداف: شناخت ارتباط برخی ویژگیها از جمله تاب آوری، با موفقیت تحصیلی کمک کننده است. لذا این پژوهش با هدف بررسی ارتباط بین تاب آوری و موفقیت تحصیلی در دانشجویان دندانپزشکی ترتیب داده شد مواد و روشها: این مطالعه همبستگی از نوع مقطعی بود که تعداد 185 نفر از دانشجوان دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی به ي روش نمونه گیری آسان، در آن شرکت داشتند. ابزار تاب آوری، پرسشنامه کونور&nbsp; دیویدسون و ملاک اندازه گیری موفقیت تحصیلی معدل نمره آزمون علوم پایه بود. تحلیل دادهها با استفاده از آزمون کای دو و رگرسیون لجستیک انجام شد. برای رعایت کامل اخلاق در پژوهش، برای دانشجویان، موضوع تحقیق توضیح داده شد و بعد از گرفتن رضایت شفاهی، در مطالعه شرکت داده شدند. &nbsp;یافتهها: بین نمره تاب آوری با نمره علوم پاه به عنوان ملاک موفقیت تحصیلی ارتباط مثبت و مستقیم معنی دار مشاهده شد. میانگین نمره يتاب آوری 62/27بود. حداقل نمره تاب آوری 21 و حداکثر نمره تاب آوری 91 تعیین شد. 82/7 درصد دارای نمره علوم پایه بیشتر از 120 موفق و 12/4درصد دارای نمره علوم پایه کمتر از 120 غیرموفق بودند. نتیجه گیری: نتایج این مطالعه برای برنامهریزان آموزشی، بسیار مفید است. در برنامه فعلی آموزشی دندانپزشکی تاکید بیشتر بر صلاحیت های حرفهای به عنوان عامل موفقیت تحصیلی است، در حالی که برخی خصوصیات شخصیتی فردی هم با موفقیت تحصیلی مستقیما در ارتباط هستند. لذا بر لزوم تغییر و اصلاح برنامه های آموزشی به سمت پرورش ابعاد شخصیتی موثر بر منش و رفتار حرفهای تاکید میشود &nbsp