111 research outputs found
Sleep quality in nurses working in different shifts
The nursing staff who are working at hospitals with a shift-work scheduling might confront with sleep disorders related to the characteristics of nursing profession. The results of studies have ruled out the close relationship between life quality and health. It must be mentioned that the quality of life is affected by sleep pattern. The aim of this study was investigating sleep quality in nurses working in different shifts at hospitals affiliated to Zahedan University of Medical Sciences. A cross sectional study was conducted on 299 nurses who were working at general hospitals of Zahedan University of Medical Sciences in 2008. Pittsburgh sleep quality index was utilized to collect data. The data were analyzed in SPSS version 17. susing Mann-Whitney, Kruskal Wallis tests and Spearman correlation coefficient. The subjects were consist of 66 men (22.1%) and 233 women (77.9%) whit age mean 31.6± 6.6 years. The mean of work experience was 7.55± 6.8 years. The findings of study showed that sleep quality were suitable in only 55(17.1%) of nurses but 221(73.9%) of nurses have not sleepiness. The quality of life was high among only 32(10.7%) of nurses. In this study, quality of life has a relationship with sleep quality (P=.001, r=-.572) and sleepiness (P=.001, r=-.246). The sleep quality was related with gender, age, monthly income, disease, marital status and type of insurance. Also, the sleepiness was related to marital status and life quality was related to monthly income, disease, marital status and type of insurance P<0.05). This study showed that sleep quality is not suitable among nurses. Also, in this study the sleep pattern was related to quality of life, so lack of enough and suitable sleep will affected the quality of life, in turn, provided health care by nurses to patients and attendance would not be fair. Correcting and modification the sleep quality among nurses is very important. © 2015
The role of field redefinition on renormalisability of a general supersymmetric gauge theories
We investigate some issues on renormalisability of non-anticommutative
supersymmetric gauge theory related to field redefinitions. We study one loop
corrections to supersymmetric gauge theory
coupled to chiral matter in component formalism, and show the procedure which
has been introduced for renormalisation is problematic because some terms which
are needed for the renormalisability of theory are missed from the Lagrangian.
In order to prove the theory is renormalisable, we redefine the gaugino and the
auxiliary fields(), which result in a modified form of the
Lagrangian in the component formalism. Then, we show the modified Lagrangian
has extra terms which are necessary for renormalisability of
non-anticommutative supersymmetric gauge field theories. Finally we prove supersymmetric gauge theory is renormalisable up to one loop
corrections using standard method of renormalisation; besides, it is shown the
effective action is gauge invariant.Comment: arXiv admin note: text overlap with arXiv:hep-th/0505248 by other
author
Transverse expansion of hot magnetized Bjorken flow in heavy ion collisions
We argue that the existence of an inhomogeneous external magnetic field can
lead to radial flow in transverse plane. Our aim is to show how the
introduction of a magnetic field generalizes the Bjorken flow. We investigate
the effect of an inhomogeneous weak external magnetic field on the transverse
expansion of in-viscid fluid created in high energy nuclear collisions. In
order to simplify our calculation and compare with Gubser model, we consider
the fluid under investigation to be produced in central collisions, at small
impact parameter; azimuthal symmetry has been considered. In our model, we
assume an inhomogeneous external magnetic field following the power-law decay
in proper time and having radial inhomogeneity perpendicular to the radial
velocity of the in-viscid fluid in the transverse plane; then the space time
evolution of the transverse expansion of the fluid is obtained. We also show
how the existence of an inhomogeneous external magnetic field modifies the
energy density. Finally we use the solutions for the transverse velocity and
energy density in the presence of a weak magnetic field, to estimate the
transverse momentum spectrum of protons and pions emerging from the
Magneto-hydrodynamic solutions
Non-relativistic approximate numerical ideal-magneto hydrodynamics of (1+1) D transverse flow in Bjorken scenario
In this study, we investigate the impact of the magnetic field on the
evolution of the transverse flow of QGP matter in the magneto-hydrodynamic
(MHD) framework. We assume that the magnetic field is perpendicular to the
reaction plane and then we solve the coupled Maxwell and conservation equations
in (1+1D) transverse flow, within the Bjorken scenario. We consider a QGP with
infinite electrical conductivity. First, the magnetic effects on the QGP medium
at mid-rapidity are investigated at leading order; then the time and space
dependence of the energy density, velocity and magnetic field in the transverse
plane of the ideal magnetized hot plasma are obtained
Transverse and non-boost longitudinal expansion of (2+1)dimensional relativistic ideal-hydrodynamics flow in heavy ion collisions
This study investigates the evolution of quark gluon plasma (QGP) within a
generalized Bjorken flow framework. The medium under consideration is assumed
to possess a finite transverse size and to expand both radially and along the
beam axis. However, we assume that the boost invariance of longitudinal
expansion is broken.
To be more specific, we generalize the Bjorken solution to include the
acceleration and transverse expansion of the fluid. We analytically study the
(2 + 1) dimensional longitudinal acceleration expansion of hot and dense quark
matter, applying a perturbation approach to solve the relativistic
hydrodynamics equations. This procedure enables us to obtain exact algebraic
expressions for fluid velocities and energy densities in both transverse and
longitudinal directions.
To simplify our calculations, we assume that the fluid is produced in central
collisions, and therefore, we consider azimuthal symmetry. We compare the
radial velocity and correction energy density with those obtained from the
Gubser model.
Furthermore, we determine the fluid's acceleration parameter and longitudinal
correction energy density, which exhibits a Gaussian distribution
The impact of probiotic yogurt consumption on lipid profiles in subjects with mild to moderate hypercholesterolemia: A systematic review and meta-analysis of randomized controlled trials
Background and aims: Potential beneficial effect of probiotic yogurt on the lipid profile has raised much interest. However, the results are inconsistent in this regard. The aim of the study is to determine the effects of probiotic yogurt on serum lipid profile in individuals with mild to moderate hypercholesterolemia. Methods and results: Online databases including PubMed, Scopus, ISI Web of Science, Cochrane Central Register of Controlled Trials, Science Direct, Google Scholar and Igaku Chuo Zasshi were searched until March 19th 2019. The effect sizes were expressed as the weighted mean difference (WMD) with 95 confidence interval (CI). Seven eligible trials with 274 participants were included in this systematic review. Pooling of 9 effect sizes from these seven articles revealed a significant reduction in total cholesterol and low density lipoprotein cholesterol levels following probiotic yogurt consumption (mean difference: �8.73 mg/dl, 95 CI: �15.98, �1.48, p-value = 0.018 and mean difference: �10.611 mg/dl, 95 CI: �16.529, �4.693, p-value = 0.000, respectively) without significant heterogeneity among the studies (I2 = 40.6, p-value = 0.1 and I2 = 24.2, p-value = 0.229, respectively). The results showed no significant changes in high density lipoprotein cholesterol and triglyceride levels. Also, none of the variables showed a significant change for sensitivity analysis. Conclusion: Available evidence suggests that probiotic yogurt can significantly reduce total cholesterol and LDL-c in subjects with mild to moderate hypercholesterolemia without a significant effect on HDL-c and triglyceride levels. © 2019 The Italian Society of Diabetology, the Italian Society for the Study of Atherosclerosis, the Italian Society of Human Nutrition, and the Department of Clinical Medicine and Surgery, Federico II Universit
Study of the adsorption properties of an almond shell in the elimination of methylene blue in an aquatic
The discharges of many industries are loaded with dyes that pose a major problem for health and the environment. Various techniques and methods (physical, chemical, biological...) were developed for the treatment of the effluents charged in dyes. Adsorption is one of the most suitable techniques for the removal of dyes, and natural wastes are among the most used materials as adsorbents. This work is based on the study of the removal of methylene blue in an aqueous medium, using almond shells as adsorbents. The support used was characterized by X-ray diffraction, Scanning electron microscopy, BET method, and Infrared spectroscopy. The results obtained showed that the adsorption equilibrium is established after 20 minutes. We also evaluated the effect of parameters such as pH effect, mass effect, temperature effect, and particle size effect. The equilibrium adsorption kinetics shows that this support has good retention for methylene blue. The adsorption isotherm obtained is described by the Freundlich model and this adsorption follows a pseudo-second-order equation. The thermodynamic parameters show that the process is endothermic, spontaneous, and disordered
The Full Two-Loop R-parity Violating Renormalization Group Equations for All Minimal Supersymmetric Standard Model Couplings
We present the full two-loop -functions for the minimal supersymmetric
standard model couplings, extended to include R-parity violating couplings
through explicit R-parity violation
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