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

Scientometric Analysis of Medical and Non-Medical Highly Cited Papers of Iran in Essential Science Indicator (ESI)

The aim of the present research is to study scientometric indicators (the number of articles and citations, the mean citation per paper, H-index, Y-index, and the national and international collaboration) of medical and non-medical highly cited papers of Iran in the Essential Science Indicators (ESI). The research population is all highly cited articles of Iran in ESI during 2005 to 2015. Data was retrieved from ESI and was analyzed using descriptive statistics. Findings show that Iran has achieved the 35th global rank in terms of the number of highly cited articles. This rank encompasses % 0.1 of the highly cited medical subject areas and % 0.6 of the global portion in non-medical areas. The growth of highly cited papers in non-medical subject areas is more than medical subject ones. Y-index indicates that the role of authors in most highly cited articles in both medical and non-medical subject areas is either as the corresponding or the first author, with an inclination towards the first author. Most of Iran’s highly cited articles in the medical subject areas are based on international collaborations, but in the non-medical areas, they are based on national collaborations. The most international collaborations are with U.S, Canada and England, respectively. H-index of Iran is 141. As a whole, in quantitative and qualitative assessment, non-medical subject areas have a better status than medical subject areas. In general, it can be said that the status of scientific products and the international status of Iran is not satisfactory. Professional planning and policy should be taken into consideration by Iran.

Practical Scheme for Realization of a Quantum Battery

We propose a practical scheme for a quantum battery consisting of an atom-cavity interacting system under a structured reservoir in the non-Markovian regime. We investigate a multi-parameter regime for the cavity-reservoir coupling and reveal how these parameters affect the performance of the quantum battery. Our proposed scheme is simple and may be achievable for practical realization and implementation.Comment: 7 Figures, 8 pages. All comments are welcom

Accessibility and Types of Online Sources Cited in Scholarly Biomedical Journal in Iran

One type of frequently used references in scientific papers is online references. The aim of this study is to study the prevalence, accessibility and types of online sources in biomedical journals in Iran from 2010 to 2012. We analyzed online references cited in 401 articles from 21 scientific journals indexed in PubMed, Web of Science, and Scopus. Findings revealed that only 73 papers (18.2%) had cited online sources in their references. of 186 online citations, 72 (38.7%) citations were accessible, and the URLs to 114 citations did not work (61.3%). The majority of unreachable citations were unstable citations (32.3%). Most online sources (62%) were cited in “Iranian Journal of Public Health”. An increase in the number of online citations was observed over the studied years. The study indicated that the rate of online citations is low in the studied journals, and most online citations were unreachable. The lack of clear guidelines in citing online sources seemed to be a major reason for the inaccessibility of online citations

Behavioural and molecular study of the effects of rosuvastatin on acquisition and retention of spatial memory impaired by H-89 in rats

There is controversy on the effect of statins on cognitive functions such as spatial memory. In the present study, effect of ten- day oral gavage of rosuvastatin (Ros, 20 mg/kg) on spatial learning and spatial memory retention impaired by H-89, was investigated in male rats. This study was comprised of two sets of experiments each including the following 3 groups (n = 8): Control group treated with DMSO; H-89 group received bilateral intra-hippocampal H-89 (10 μM/side, in DMSO) and Ros- H-89 group orally treated with Ros (20 mg/kg) and H-89 (similar to the H-89 group). For spatial learning (acquisition phase) assessment, from day 7 of Ros gavage, rats were trained in the Morris water maze (MWM) for four days (one block of 4 stages each day) and received daily H-89, 30 min after Ros gavage. On day 11, the probe test was performed. Also, to assess spatial memory retention, from day 7 to 10 of Ros gavage, rats were trained in MWM but received H-89 on day 10 only. On day 12, the probe test was performed. Besides, CREB and p-CREB protein expression was assessed in hippocampal samples and oxidative stress status was assessed in serum samples. We observed that H-89 led to a clear impairment of the spatial learning and spatial memory recall, increased levels of lipid peroxidation and downregulated CREB and p-CREB proteins, compared to the control group. However, Ros prevented H-89-induced deleterious consequences which might be probably in part due to its ameliorative effects on lipid peroxidation index and CREB and p-CREB expression

Highly Cited Papers in Medical Fields: Scientometric Indicators and collaboration in OIC countries

Some OIC countries have been growing rapidly in terms of international scientific publication.The purpose of this study was to determine the number of highly cited papers, the scholarly impact, H-index, Y-index, and the status of scientific collaboration among Islamic countries in medical fields. The research population included the highly cited papers in medical subject fields of all Islamic countries based on ESI. The Islamic world accounts for 1,338 (2.58%) of the world’s highly cited papers in medical fields, showing a rising trend from 2007–2017. Turkey, Saudi Arabia, and Iran rank first to third, respectively, in terms of the number of highly cited papers and the H-index. Turkey, Saudi Arabia, and Pakistan rank in the top three in terms of citation. Iran has published the largest number of papers by the first author and corresponding author, while Turkey and Saudi Arabia rank second and third, respectively. Collaboration among Islamic countries is low. Most of the highly cited papers from Islamic countries are a result of international collaboration with other countries. The impact of scientific papers from Islamic countries is very low. In order To increase the effectiveness of the papers, planning and policymaking in these countries should be reviewed

Accessibility and Types of Online Sources Cited in Scholarly Biomedical Journal in Iran

One type of frequently used references in scientific papers is online references. The aim of this study is to study the prevalence, accessibility and types of online sources in biomedical journals in Iran from 2010 to 2012. We analyzed online references cited in 401 articles from 21 scientific journals indexed in PubMed, Web of Science, and Scopus. Findings revealed that only 73 papers (18.2%) had cited online sources in their references. of 186 online citations, 72 (38.7%) citations were accessible, and the URLs to 114 citations did not work (61.3%). The majority of unreachable citations were unstable citations (32.3%). Most online sources (62%) were cited in “Iranian Journal of Public Health”. An increase in the number of online citations was observed over the studied years. The study indicated that the rate of online citations is low in the studied journals, and most online citations were unreachable. The lack of clear guidelines in citing online sources seemed to be a major reason for the inaccessibility of online citations

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 classification of WebQual dimensions based on the asymmetric impact-performance of Kano\'s customer satisfaction model: A case study of the Tehran virtual university website

The extension of the Internet and World Wide Web has created new opportunities as well as new challenges for institutions and individuals who are either receiving or delivering education. Electronic learning is one of the most important breakthroughs in education in which the website is the first access point that users receive educational services provided. Therefore, website quality should be considered as an important factor resulted in the success of virtual learning and studied in a more detailed manner from the e-learners’ perspective. This paper aims to classify the quality aspects of the Tehran virtual university website (webqual 4.0) according to the Kano model of customer satisfaction and determine the asymmetric impact of the webqual 4.0 dimensions’ performance on overall user satisfaction in order to prioritize those dimensions in resource allocation, as well as sensitize the managers of the mentioned website. This is a descriptive-survey and applied study, and also a cross-sectional one. The study population included Tehran University students studying in virtual courses and the data collection tool was the questionnaire of webqual 4.0, as well as, a researcher-made questionnaire to measure end-user satisfaction. Multiple regression analysis was used to investigate the impact of performance asymmetry. The result showed that usability dimension was the high-performance excitement factor, information quality dimension was a high-performing basic factor, and service interaction dimension had low performance scores and was a basic factor. And finally, a short-term plan to improve service interaction dimension to reduce user discontent and a long-term plan to better both information quality and usability dimensions to increase user satisfaction was proposed

Associated Factors with Neonatal Weight Loss After Birth

Background Neonatal weight loss in the first few days of life is a common phenomenon yet limited information about weight loss after birth is available. Objectives The present study aimed at determining associated factors with neonatal weight loss after birth in newborns. Methods In this cross-sectional study, the sample included 982 healthy, term and singleton newborns that had referred to health centers of Ilam. The mother and neonate’s demographic characteristics, and the mother’s pregnancy, childbirth and postpartum data were collected by a questionnaire. The data was analyzed using univariate and multivariate statistical analysis using the SPSS software. Results The mean NWL 3 to 5 days after birth was 129 ± 92 grams. Infants had lost 4.04 ± 3.19% of their birthweight. The results of multivariate analysis (logistic regression) showed that breastfeeding (OR = 7.228, CI: 4.707 - 11.099), cesarean section (OR = 4.429, CI: 3.166 - 6.196), female gender (OR = 3.080, CI: 2.201 - 4.309), mother’s no experience of breast feeding (OR = 2.831, CI: 1.817 - 4.409), weighting more than 4000 grams (OR = 2.464, CI: 1.034 - 5.870) and jaundice (OR = 1.486, CI: 1.035 - 2.133) were amongst risk factors for neonatal weight loss (NWL) of more than 5%, while risk factors for NWL of more than 7% included only breastfeeding (OR = 2.904, CI: 1.759 - 4.796), cesarean section (OR = 2.073, CI: 1.423 - 3.019), and female gender (OR = 1.850, CI: 1.254 - 2.730). Conclusions The study findings revealed that breastfeeding and cesarean section are the strongest predictors of NWL. Therefore, it is necessary for infant-friendly hospitals to come up with strategies to reduce the rate of cesarean section and establish successful breastfeeding before mothers are discharged