Enhancing the efficiency of open quantum batteries via adjusting the classical driving field

In the context of quantum information, a quantum battery refers to a system composed of quantum particles that can store and release energy in a way that is governed by the principles of quantum mechanics. The study of open quantum batteries is motivated by the fact that real-world quantum systems are almost never perfectly isolated from their environment. One important challenge in the study of open quantum batteries is to develop theoretical models that accurately capture the complex interactions between the battery and its environment. the goal of studying open quantum batteries is to develop practical methods for building and operating quantum devices that can store and release energy with high efficiency and reliability, even in the presence of environmental noise and other sources of decoherence. The charging process of open quantum batteries under the influence of dissipative environment will be studied. In this Work, the effect of the classical driving field on the charging process of open quantum batteries will be investigated. The classical driving field can be used to manipulate the charging and discharging process of the battery, leading to enhanced performance and improved efficiency. It also will be showed that the efficiency of open quantum batteries depends on detuning between the qubit and the classical driving field and central frequency of the cavity and the classical driving field.Comment: 9 pages, 11 figures. This is just a draft version of the manuscript. We welcome your comments and contribution

Individual and Environmental determinants of Health Related Quality of Life in Iranian patients with type II diabetes

Abstract Background: In recent two past decades prevalence of Type II diabetes has increased dramatically. Despite its financial costs, one of its consequence outcomes is decreasing quality of life of Diabetic patients. So it seems to be more useful to evaluate the influential personal and also environmental factors on patient’s quality of life. The purpose of this study was to assess effects of personal and environmental factors on Health Related Quality of Life (HRQoL) of Iranian type II diabetic patients. Material and Methods: We worked on some parts of data form a national cross sectional study conducted in 2006. Sampling technique was random cluster sampling. Data collection method was face to face interview based on EQ-5D questionnaire. Interview form, also measured personal factors include: gender, age, duration of diseases from diagnosis, educational and family economic status. We collected our environmental factors such as literacy rate, urbanization rate, number of medical clinics and endocrinologists from latest national census, 1385. For data analysis we used multilevel regression analysis by Ml-win software. Results: Available data were analyses for 3472 diabetic patients. Gender, age, duration of disease, economic status and educational level in personal level and urbanization rate as an environmental factor were statistically significant factors in relation with health related quality of life. Conclusion: Based on study results, gender, and age, duration of illness, family economic and educational status of patients and the rate of urbanization affect on the HRQoL of type II diabetic patients

Quantum Speed Limit for a Moving Qubit inside a Leaky Cavity

The quantum speed limit (QSL) is a theoretical lower bound of the time required for a quantum system to evolve from an arbitrary initial state to its orthogonal counterpart. This figure can be used to characterize the dynamics of open quantum systems, including non-Markovian maps. In this paper, we investigate the QSL time for a model that consists of a single qubit moving inside a leaky cavity. Notably, we show that for both weak and strong coupling regimes, the QSL time increases while we boost the velocity of the qubit inside the leaky cavity. Moreover, it is observed that by increasing the qubit velocity, the speed of the evolution tends to a constant value, and the system becomes more stable. The results provide a better understanding of the dynamics of atom-photon couplings and can be used to enhance the controllability of quantum systems

The Prevalence of Children’s Postural Abnormalities and Its Association with Sport Activity

Background & Objective: The future of each society is based on its youth. In addition, the physical-mental health as well as the presence of healthy and capable people is a considerable requirement for all the societies. Thus, the aim of this research was to study the prevalence rate of children’s postural abnormalities and its relationship with sport activity. Materials & Method: 148 children (74 boys and 74 girls) were randomly selected. The research tools were plummet (guideline), matrix sheet, mirror box and the personal characteristics questionnaire. All the results were analyzed by using chi-square, freedman statistical method and the spearman correlation coefficient. Result: The results indicated that there is a significant difference between the two normal and abnormal height structure states (p≤0.01). Similarly, there was a significant negative difference between the number of skeletal abnormalities and the exercise activities in girls (r= 0.355) and boys (r= 0.369). In the case of abnormalities comparison between the sexes, the freedman test results indicated that there is a significant difference between the ranking of the boys’ skeletal abnormalities as compared to the girls, in a way that the dorsal lord sis and flat back were the highest and the lowest in the girls, respectively. Moreover, the results of the person correlation coefficient test indicated that there is only a positive significant relationship between the age of the girls and the number of skeletal abnormalities (p≤0.01, r=0.586). Conclusions: According to the results of this research, it can be stated that majority of the children at least have single skeletal abnormality, resulted from some factors such as heredity, daily wrong habits, and non standard equipments and facilities. In addition, not attending the related sports activities may increase the chance of these skeletal abnormalities

D-Limonene Alleviates Acute Kidney Injury Following Gentamicin Administration in Rats: Role of NF-κB Pathway, Mitochondrial Apoptosis, Oxidative Stress, and PCNA

Clinical application of gentamicin (GM) is well known to be associated with the development of acute kidney injury (AKI). This study was the first to investigate the possible protective effects of D-limonene (D-lim) on AKI following GM administration in rats. 32 rats arranged in four groups (n=8): (1) the control group received saline intraperitoneally (0.5 ml/day) and orally (0.5 ml/day), (2) the D-lim group received D-lim (100 mg/kg) orally and saline (0.5 ml/day) intraperitoneally, (3) the GM group received GM (100 mg/kg/day) intraperitoneally and saline (0.5 ml/day) orally, and (4) the treated group received intraperitoneal GM (100 mg/kg) and oral D-lim (100 mg/kg). All treatments were performed daily for 12 consecutive days. Results revealed that D-lim ameliorated GM-induced AKI, oxidative stress, mitochondrial apoptosis, and inflammation. D-lim showed nephroprotective effects as reflected by the decrease in serum urea and creatinine and improvement of renal histopathological changes. D-lim alleviated GM-induced oxidative stress by increasing the activities of renal catalase, serum and renal glutathione peroxidase, and renal superoxide dismutase and decreasing renal malondialdehyde and serum nitric oxide levels. Intriguingly, D-lim suppressed mitochondrial apoptosis by considerably downregulating Bax and caspase-3 (Casp-3) mRNA and protein expressions and markedly enhancing Bcl2 mRNA and protein expressions. Furthermore, D-lim significantly decreases GM-induced inflammatory response through downregulation of NF-κB, IL-6, and TNF-α mRNA and/or protein expressions and decrease in renal myeloperoxidase activity. Finally, D-lim remarkably downregulated PCNA protein expression in the treated group compared with the GM group. In brief, this study showed that D-lim alleviated AKI following GM administration in rats, partially through its antioxidant, anti-inflammatory, and antiapoptotic activities as well as downregulation of PCNA expression

The Effects of Fifa 2015 Computer Games on Changes in Cognitive, Hormonal and Brain Waves Functions of Young Men Volunteers

Introduction: Computer games have attracted remarkable attentions in general publics with different cultures and their effects are subject of research by cognitive neuroscientists. In the present study, possible effects of the game Fifa 2015 on cognitive performance, hormonal levels, and electroencephalographic (EEG) signals were evaluated in young male volunteers. Methods: Thirty two subjects aged 20 years on average participated mutually in playing computer game Fifa 2015. Identification information and general knowledge about the game were collected. Saliva samples from the contestants were obtained before and after the competition. Perceptive and cognitive performance including the general cognitive health, response delay, attention maintenance, and mental fatigue were measured using PASAT test. EEG were recorded during the play using EEG device and analyzed later using QEEG. Simultaneously, the players’ behavior were recorded using a video camera. Saliva cortisol levels were assessed by ELISA kit. Data were analyzed by SPSS program. Results: The impact of playing computer games on cortisol concentration of saliva before and after the game showed that the amount of saliva plasma after playing the game has dropped significantly. Also the impact of playing computer games on mental health, before and after the game indicated that the number of correct answers has not changed significantly. This indicates that sustained attention has increased in participants after the game in comparison with before that. Also it is shown that mental fatigue measured by PASAT test, did not changed significantly after the game in comparison to before that. The impact of game on changes in brain waves showed that the subjects in high activity state during playing the game had higher power of the EEG signals in most of the channels in lower frequency bands in compared to normal state. Discussion: The present study showed that computer games can positively affect the stress system and the perceptual-cognitive system. Even though this impact was not significant in most cases, the changes in cognitive and hormonal test and also in brain waves were visible. Hence, due to the importance of this matter, it is necessary to create control systems in selecting the types of games for playing