Continuity of symplectically adjoint maps and the algebraic structure of Hadamard vacuum representations for quantum fields on curved spacetime

We derive for a pair of operators on a symplectic space which are adjoints of each other with respect to the symplectic form (that is, they are sympletically adjoint) that, if they are bounded for some scalar product on the symplectic space dominating the symplectic form, then they are bounded with respect to a one-parametric family of scalar products canonically associated with the initially given one, among them being its ``purification''. As a typical example we consider a scalar field on a globally hyperbolic spacetime governed by the Klein-Gordon equation; the classical system is described by a symplectic space and the temporal evolution by symplectomorphisms (which are symplectically adjoint to their inverses). A natural scalar product is that inducing the classical energy norm, and an application of the above result yields that its ``purification'' induces on the one-particle space of the quantized system a topology which coincides with that given by the two-point functions of quasifree Hadamard states. These findings will be shown to lead to new results concerning the structure of the local (von Neumann) observable-algebras in representations of quasifree Hadamard states of the Klein-Gordon field in an arbitrary globally hyperbolic spacetime, such as local definiteness, local primarity and Haag-duality (and also split- and type III_1-properties). A brief review of this circle of notions, as well as of properties of Hadamard states, forms part of the article.Comment: 42 pages, LaTeX. The Def. 3.3 was incomplete and this has been corrected. Several misprints have been removed. All results and proofs remain unchange

Fermions on adS

We construct the Feynman propagator for Dirac fermions on anti-de Sitter space-time and present an analytic expression for the bi-spinor of parallel transport. We then renormalise the vacuum expectation value of the stress-energy tensor and end by analysing its renormalised expectation value at finite temperatures

Attractor states and infrared scaling in de Sitter space

The renormalized expectation value of the energy-momentum tensor for a scalar field with any mass m and curvature coupling xi is studied for an arbitrary homogeneous and isotropic physical initial state in de Sitter spacetime. We prove quite generally that has a fixed point attractor behavior at late times, which depends only on m and xi, for any fourth order adiabatic state that is infrared finite. Specifically, when m^2 + xi R > 0, approaches the Bunch-Davies de Sitter invariant value at late times, independently of the initial state. When m = xi = 0, it approaches instead the de Sitter invariant Allen-Folacci value. When m = 0 and xi \ge 0 we show that this state independent asymptotic value of the energy-momentum tensor is proportional to the conserved geometrical tensor (3)H_{ab}, which is related to the behavior of the quantum effective action of the scalar field under global Weyl rescaling. This relationship serves to generalize the definition of the trace anomaly in the infrared for massless, non-conformal fields. In the case m^2 + xi R = 0, but m and xi separately different from zero, grows linearly with cosmic time at late times. For most values of m and xi in the tachyonic cases, m^2 + xi R grows exponentially at late cosmic times for all physically admissable initial states.Comment: 30 pages, 6 figures, 46 kB tar.gz fil

Non-suicidal self-injury in adolescence: a longitudinal study of the relationship between NSSI, psychological distress and perceived parenting

Objective: The present study investigates whether either adolescents' psychological distress and/or perceived parenting predicted the occurrence of NSSI. Furthermore, the consequences of NSSI are examined in a three-wave longitudinal study. Design: The sample at time 1 (age 12) consisted of 1396 adolescent reports and 1438 parent reports. At time 2 (age 13), 827 adolescent reports and 936 parent reports were obtained. Time 3 (age 14) included 754 adolescent reports and 790 parent reports. Psychological distress of adolescents was measured using the Strengths and Difficulties Questionnaire. Perceived parenting behaviors were examined by the Parental Behavior Scale and the Psychological Control Scale. Results: A total of 10% of the adolescents engaged in NSSI at least once before age 15. Higher psychological distress of adolescents at time 1 was associated with the presence of NSSI at time 2 or 3. The association between psychological distress at time 1 and perception of decreased parental rule setting at time 3 was mediated by the presence of NSSI at time 2. Conclusions: The present study showed that psychological distress at age 12 predicts NSSI over time and that parental awareness of NSSI changes the perception of parenting behaviors. (C) 2014 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved

Not all adiabatic vacua are physical states

Adiabatic vacua are known to be Hadamard states. We show, however that the energy-momentum tensor of a linear Klein-Gordon field on Robertson-Walker spaces developes a generic singularity on the initial hypersurface if the adiabatic vacuum is of order less than four. Therefore, adiabatic vacua are physically reasonable only if their order is at least four. A certain non-local large momentum expansion of the mode functions has recently been suggested to yield the subtraction terms needed to remove the ultraviolet divergences in the energy-momentum tensor. We find that this scheme fails to reproduce the trace anomaly and therefore is not equivalent to adiabatic regularisation.Comment: 13 pages, LaTex2

First Steps to Promoting Open Access for Research Data and Publications on Campus.

Open Access (OA) is “the free, immediate, online availability of research articles coupled with the right to use these articles fully in the digital environment.” (SPARC, 2014) While much of the conversation about OA centers on business models, economics, workflow processes, institutional policy, and the transformative influence on academic publishing, limited dialogue occurs about best practices to guide educational and research institutions when planning to develop a policy on Open Access. In 2015, the Dean’s Council at Stephen F Austin State University (SFASU) agreed to support Open Access on campus for research data and publications. The SFA Scholar Works, the University’s institutional repository would archive a wide range of research and scholarship produced by the academic community (i.e., faculty-student research, electronic thesis and dissertations (ETDs), and multimedia items). The Steen Library and Center for Digital Scholarship would play an active role in encouraging and educating members of the academic community on adopting Open Access and developing a policy for open research data and publications. However, many concerns among faculty on campus in regard to adopting a required mandate to open research created the need to consider methods that first focused on faculty interests, concerns, and ultimately acceptance. Student research: undergraduate and graduate were viewed as essential tools for building consensus. Results one year later were surprising and reveal how key measures when considered can help to initiate change. This presentation will discuss best practices and provide examples of the innovative steps taken to generate support for Open Access at SFASU

HUBUNGAN MINAT BELAJAR AQIDAH AKHLAK DENGAN MORALITAS SISWA KELAS V MI MATHLA’UL ANWAR SIBANTENG

Many factors cause moral degeneration among students at this time, to prepare students to have a strong personality, quality and noble, madrasah as an Islamic educational institution needs to pay attention to the interest of learning on subjects Aqidah Akhlak. The purpose of this research is to know the correlation of learning interest of Aqidah Akhlak with morality of student in MI Mathla'ul Anwar Sibanteng. The research method used is quantitative, because the research data in the form of numbers and analysis using statistics. Type of research instrument using questionnaire and likert scale, while the approach is reaserch field. The research hypothesis formulated as follows is suspected to have a significant influence between the interest of learning Aqidah Akhlak with the morality of students based on rxy calculation of 0.44 number of correlation index obtained no negative sign, which lies between 0.40 to 0.69. Based on the correlation table product moment guidelines used, it can be said that between variables X and Y there is a correlation of moderate or moderate. See the value of xy obtained is 0.44 while the value of each table is 0.273 and 0.354. Thus it turns out the rxy at a significance level of 5% and at a significance level of 1% greater than the value of the table. Thus at a significance level of 5% and 1% Ha accepted and Ho rejected. Based on the analysis can be concluded that between the interest of learning Aqidah Akhlak with the morality of students there is a significant relationship with the level of correlation is enough or moderate

Ralph W. Steen Library 2015 – 2016 Quantitative Comparative Statistical Analysis

For academic libraries at public state universities, the challenge continues on how to evaluate performance, measure progress, and find meaningful ways to demonstrate their worth. The challenge is to find meaningful ways to demonstrate how library programs and services contribute to learning outcomes and student success. This report presents a comparative analysis of Ralph W. Steen Library and ten peer institutions to highlight areas of excellence and under-performance that may warrant further attention

Progressive, Perceptually Transparent Coder for Very High Quality Images

In the perceptually transparent coding of images, we use representation and quantization strategies that exploit properties of human perception to obtain an approximate digital image indistinguishable from the original. This image is then encoded in an error free manner. The resulting coders have better performance than error free coding for a comparable quality. Further, by considering changes to images that do not produce perceptible distortion, we identify image characteristics onerous for the encoder, but perceptually unimportant. One such characteristic is the typical noise level, often imperceptible, encountered in still images. Thus, we consider adaptive noise removal to improve coder performance, without perceptible degradation of quality. In this paper, several elements contribute to coding efficiency while preserving image quality: adaptive noise removal, additive decomposition of the image with a high activity remainder, coarse quantization of the remainder, progressive representation of the remainder, using bilinear or directional interpolation methods, and efficient encoding of the sparse remainder. The overall coding performance improvement due to noise removal and the use of a progressive code is about 18%, as compared to our previous results for perceptually transparent coders. The compression ratio for a set of nine test images is 3.72 for no perceptible loss of quality

Evaluation of prescribing patterns in diabetic and hypertensive patients in a South Delhi Hospital

Background: Drug utilization studies (DUS) defined by World Health Organization as the marketing, distribution, prescription and use of drugs in a society, considering its consequences, either medical, social, and economic. The increasing importance of DUS as a valuable investigation resource in pharmacoepidemiology has been linking it with other health related areas, such as public health, pharmacovigilance, pharmacoeconomics, and pharmacogenetics.Methods: The study was a prospective DUS carried out in medicine OPD of Indian Institute of Technology Hospital, New Delhi, India in which a total of 595 prescriptions of hypertensive and diabetic patients were reviewed. All diabetic and/or hypertensive patients; irrespective of age, gender; who had least one drug in the prescription were included. Data were collected by screening of physician’s prescribing record and patient medication profile.Results: A total of 595 prescriptions were recorded. 57.31% were males as compared to 42.69% females. 54.62% patients were hypertensive (325 prescription); 14.78% patients were diabetic (88 prescription) whilst 30.58% had both the diseases. Of 507 prescriptions having antihypertensive drugs, combination therapy was utilized (40.8%) in the prescriptions and out of 270 prescriptions having antidiabetic drugs, 143 (52.96%) prescription were of combination therapy. Among antihypertensive drugs, angiotensin-converting enzyme inhibitors were the most frequently prescribed class of drugs (19.18%). The combination most commonly prescribed was amlodipine and atenolol (14.05%). Antidiabetic drugs made up for 11.05% of the total drugs prescribed. 28.78% of all hypoglycemic agents were sulfonylurea. Glimepiride and metformincombination was the most prescribed anti-diabetic drugs combination (16.16%).Conclusion: Both hypertension and diabetes are considered to be lifestyle diseases. Hence, apart from optimal and appropriate prescribing, there is a need for lifestyle modification to obtain improved outcomes. Combination therapy was observed in a high percentage of prescriptions. Though monotherapy is associated with improved compliance and fewer side effects, combination therapy is desirable for synergistic actions and to overcome complications