Double Relaxation via AdS/CFT

We exploit the AdS/CFT correspondence to investigate thermalization in an N=2 strongly coupled gauge theory including massless fundamental matter (quark). More precisely, we consider the response of a zero temperature state of the gauge theory under variation of an external electric field leading to a time-dependent current. The holographic dual of the above set-up is given by introducing a time-dependent electric field on the probe D7-brane embedded in an AdS_5 X S^5 background. In the dual gravity theory, due to a time-dependent electric field an apparent horizon forms on the brane which, according to AdS/CFT dictionary, is the counterpart of the thermalization process in the gauge theory. We classify different functions for time-dependent electric field and study their effect on the apparent horizon formation. In the case of pulse functions where the electric field varies from zero to zero, apart from non-equilibrium phase, we observe that two apparent horizons form on the brane. On the gauge theory side, it means that the state of the gauge theory experiences two different temperatures during the time evolution.Comment: 28 pages, 13 figures, published versio

Weight gain in pregnancy and its correlation with birth weight of infants

Abstract: Introduction: Birth weight is one of the main determinations for somatic and mental growth in infants and it is an important symptom of intrauterine growth. This study has been designed to detect the weight gain in pregnancy and its correlation with birth weight of infants. Methods: Six hundred pregnant women were selected from those referred to delivery room in Hajar hospital. Data was collected by a questionnaire using conversation with mothers, prenatal, natal and infant’s records. We used similar scale balance to measure the mothers and infants weight. Age of mother less than 18 and more than 35, gestational age less than 37 weeks, twin’s pregnancy, history of abortion and intrauterine fetal death, smoking drinking of alcohol and medical history of diseases in mother, were excluded. Results: The mean of weight gain in pregnancy was 11.50 ± 3.6 kg. It was increased with the increase of parity (P=0.015) and level of education in mother (P=0.018). Also it was greater in cesarean section versus the vaginal delivery (P=0.006). The mean of birth weight was 3179.1±433.1 gr. It was greater in multifarious than the nulliparous women (P=0.003), in male infants than the female infants (P=0.013) and in educated than the uneducated women. The mean of birth weight was increased by increased of mother’s weight in the beginning and along of pregnancy. Conclusion: Results of this study showed the importance of mother’s weight at the first and along of pregnancy. Following to recognize of mothers who are at risk for delivery of low birth weight we are able to care them carefully and educate them in different field

On subgroups in division rings of type 22

Let $D$ be a division ring with center $F$. We say that $D$ is a {\em division ring of type $2$} if for every two elements $x, y\in D,$ the division subring $F(x, y)$ is a finite dimensional vector space over $F$. In this paper we investigate multiplicative subgroups in such a ring.Comment: 10 pages, 0 figure

The effect of education on parental perception of obesity in their 6-12 year old children

Child obesity is considered a major health problem, in the prevention and treatment of which parents can play a key role. However, some parents belive obese children to be healthy, and do not really feel the need to participate in any preventive and treat-ment programs. Therefore, the aim of this study is to determine parental perception of obesity in their 6-12 year old children to assess what effect educa-tion could have on their concept. Materials and Methods: This study has been done in two stages (stage 1, descriptive and second stage, ..

The morphological characters of the male external genitalia of the European hedgehog (Erinaceus Europaeus)

This study was conducted to depict anatomical characteristics of the penis of he­dgehog. Seven sexually mature male European hedgehogs were used. Following anaesthesia, the animals were scarified with chloroform inhalation. Gross penile characteristics such as length and diameter were thoroughly explored and measu­red using digital callipers. Tissue samples stained with haematoxylin and eosin and Masson’s trichrome for microscopic analysis. The penis of the European hedgehog was composed of a pair of corpus cavernosum penis and the glans penis without corpus spongiosum penis. The urethra at the end of penis, protruded as urethral process, on both sides of which two black nail-like structures, could be observed. The lower part was rounded forming a blind sac (sacculus urethralis) with a me­dian split below the urethra. Microscopically, the penile bulb lacked the corpus spongiosum penis, but, corpus spongiosum glans was seen at the beginning of the free part. In the European hedgehog, entirely stratified squamous epithelium of penile urethra, absence of corpus spongiosum penis around the urethra and bilateral urethral glands are basically different compared with other mammals. This information is expected to contribute to comparative penile morphology as well as for testing phylogenic hypotheses and expanding knowledge about reproductive biology in this animal. (Folia Morphol 2018; 77, 2: 293–300

A new method for providing a model to analyze a kite wind turbine

The ultimate purpose of simulating kite wind turbine is to predict the kite movement and the power generated by its mechanism. To simulate because when the initial estimate of the intended values is found, we may have to manipulate the simulation to find the most efficient design for manufacturing our system and then predict the final power generated for our mechanism. Simulation for the system is based on two parts: Simulation of steady-state and dynamic model, which include differential equations. In this paper, we have presented a novel idea for a proper simulation of the system based on the two static and dynamic parts in order to numerical solution of the required amount and to calculate the output power.Keywords: Kite wind turbine; Simulation; Static model; Dynamic model;Winch; Torqu