Three-dimensional Brownian diffusion of rod-like macromolecules in the presence of randomly distributed spherical obstacles: Molecular dynamics simulation

Brownian diffusion of rod-like polymers in the presence of randomly distributed spherical obstacles is studied using molecular dynamics (MD) simulations. It is observed that dependence of the reduced diffusion coefficient of these macromolecules on the available volume fraction can be described reasonably by a power law function. Despite the case of obstructed diffusion of flexible polymers in which reduced diffusion coefficient has a weak dependence on the polymer length, this dependence is noticeably strong in the case of rod-like polymers. Diffusion of these macromolecules in the presence of obstacles is observed that is anomalous at short time scales and normal at long times. Duration time of the anomalous diffusion regime is found that increases very rapidly with increasing both the polymer length and the obstructed volume fraction. Dynamics of diffusion of these polymers is observed that crosses over from Rouse to reptation type with increasing the density of obstacles.Comment: 7pages, 6 figures, accepted for publication in JCP, 201

Co-Authorship patterns and Topic Networks in the Scientific Publication of Hamadan University of Medical Sciences

Introduction: Scientific co-operation is a process in which two or more authors share their resources and talents with the aim of creating a shared work. One of the forms of scientific co-operation is co-authorship that involves the production of a scientific output by several collaborative researchers and scholars. This research has been designed to map out co-authorship networks in the Hamadan University of Medical Sciences researches indexed in the Web of Science from 2012 to 2016, and analyzes scientific collaboration and co-authorship networks in this university. Method: The present study is an applied study which has been carried out using the scientometric indicators and social network analysis. The statistical population of this research consisted of all the scientific articles that at least one of the authors of referred to the Hamadan University of Medical Sciences as the affiliation and indexed in the Web of Science from 2010 to 2016. In so doing, the network analysis technique and the software on Citespace and Gephi were run to analyze and visualize co-authorship networks. Furthermore, the software on HISTCITE was used for data analysis. Findings: All articles related to Hamadan University of Medical Sciences during the years 2012 to 2016, based on a search on the Web of Science, have 838 records. The dominant co-authorship pattern in these years is the 4 and 5 authors with 171 articles and 20.41%. The mean number of authors or collaboration index in the period considered was 5.51, the degree of Collaboration was 0.99 and the Collaborative Coefficient was 0.759. Poorolajal, Alikhani and Shahidi were the most prolific authors. Tehran University of Medical Sciences, Shahid Beheshti University and Islamic Azad University were the most prolific organizations. The greatest collaboration of Iranian researchers has been with Switzerland. Saidijam, Mahjub, Mehdizadeh, and Moghimbeigi have alloacated the highest betweenness centrality, whereas Saidijam, Mahjub, Hajilooi, and Khazaei have allocated the highest degree centrality. Conclusion: The scientific production of Hamadan University of Medical Sciences during the period from 2012 to 2016 has grown dramatically, and collaborative research at this university is growing at an appropriate level. In this study, the degree of Collaboration and the co-operation rate are high which indicates that here is a great deal of interest in co-authorship and co-operation among researchers of Hamadan University of Medical Sciences, and it is relatively unlikely to see single-authorship, which reflects the willingness of individuals to co-authorship

How Do MOHME-Affiliated Hospital Libraries Comply with the National Standards?

Introduction: : Hospital libraries have a special role in providing knowledge-evidence-based services to their users, including medical staff, patients, and their families. The present study aimed to evaluate the Ministry of Health and Medical Education (MOHME)-affiliated hospital libraries of Iran based on the national standard approved in 2021 by the National Standard Organization. Methods: The present research is an applied study regarding its purpose and a descriptive survey regarding its method. The study’s statistical population includes 213 hospital libraries of 60 universities of medical sciences affiliated with the MOHME of Iran. The data collection tool is a researcher-made checklist extracted from the national standard book of hospital libraries. SPSS software was used for data analysis. Results: The obtained results revealed that, in common, less than 50% of the hospital libraries of medical universities in Iran complied with two components of the Organization and nine components of Resources Management standards: five components of Human Resources Management and four components of Physical, Environment, and Equipment Management. Conclusion: MOHME-affiliated hospital libraries have fundamental weaknesses in the key components of Organization standard and Resource Management standards, i.e., human resource management and physical resource, environment, and equipment management, and do not comply with the standards. Therefore, taking practical measures by officials and stakeholders to improve the services, the quality of patient care, and, ultimately, the satisfaction of patients, their families, and users are essential

A Bibliometric Analysis and Visualization of the Scientific Publications of Universities: A Study of Hamadan University of Medical Sciences during 1992-2018

The evaluation of universities from different perspectives is important for their scientific development. Analyzing the scientific papers of a university under the bibliometric approach is one main evaluative approach. The aim of this study was to conduct a bibliometric analysis and visualization of papers published by Hamadan University of Medical Science (HUMS), Iran, during 1992-2018. This study used bibliometric and visualization techniques. Scopus database was used for data collection. 3753 papers were retrieved by applying Affiliation Search in Scopus advanced search section. Excel and VOSviewer software packages were used for data analysis and bibliometric indicator extraction. An increasing trend was seen in the numbers of HUMS's published papers and received citations. The highest rate of collaboration in national level was with Tehran University of Medical Sciences. Internationally, HUMS's researchers had the highest collaboration with the authors from the United States, the United Kingdom and Switzerland, respectively. All highly-cited papers were published in high level Q1 journals. Term clustering demonstrated four main clusters: epidemiological studies, laboratory studies, pharmacological studies, and microbiological studies. The results of this study can be beneficial to the policy-makers of this university. In addition, researchers and bibliometricians can use this study as a pattern for studying and visualizing the bibliometric indicators of other universities and research institutions

Information-Seeking Behavior of the Elderly in the Health Area: A Case Study in Golestan Province

Introduction: The information-seeking behavior of the elderly, the information needs of this group regarding health, and the problems and barriers to accessing this information are of great importance and play an influential role in the self-management process of the elderly. This study aims to investigate the health information-seeking behavior of the elderly in Golestan Province. Methods: In this survey study, 239 elderly individuals from Golestan Province were included. The Medlock questionnaire used for data collection. The study participants were selected using a convenience sampling method. Descriptive and inferential statistics were used for data analysis, including correlation and Poisson regression tests. All analyses were performed using SPSS 26 software at a significance level of 0.05. Results: The results revealed that the most used and reliable sources by the elderly were “Direct contact with health professionals” (29.29%) and “Television” (19.75%). The highest information searches were in scientific care, nutrition, physical activities, specific disease symptoms and causes, prescribed medications, coping with a disease, side effects of treatment, disease prediction, and treatment methods. A high correlation was found between Trust in Friends/Acquaintances (0.656), Television (0.641), and Radio (0.632) as sources of health information. In contrast, a low correlation was observed between Trust in educational courses and lectures (0.324) and Books/Encyclopedias (0.274) for obtaining health information. Conclusion: It is necessary to establish a direct communication infrastructure between health professionals and the public through expanding programs such as family physicians and developing evidence-based television programs with a knowledge translation approach

Standards for Iranian Hospital Libraries: Why do Hospital Libraries Need to be Standardized?

The objective of developing the National Standard for Hospital Libraries (NSHL) is to present an efficient tool to replace scientific methods with traditional ones. The standards should be designed to be used as a comprehensive guide for librarians working in hospitals in various fields. Various standards are currently being developed for national, public, and academic libraries. Despite the activity of more than 200 educational and medical centers and a large number of public and private medical centers in Iran, there was no comprehensive standard that could meet this group of libraries' expectations. Therefore, the development of a standard for hospital libraries began based on national research. Finally, this standard was prepared in four chapters, including mission and organization, strategic planning, resources management, and service management. This standard was handed over to the Iranian National Standards Organization and the Deputy for Research and Technology of the Ministry of Health and Medical Education to be available to users and stakeholders. The NSHL is a comprehensive guideline for establishing and developing hospital libraries and applies to all public and private hospital libraries, both

Development of information diffusion models based on mathematical models of disease diffusion

Abstract Purpose: Analysis of information diffusion process based on models of spread of epidemics is one of the issues considered by the researchers. Limited studies have addressed investigation and analysis of scientific information diffusion. Current study was conducted aiming at identifying scientific information diffusion process among academic faculty members using mathematical models of spread of diseases during 2016. Methodology: Mathematical models of spread of epidemics including SIS, SI, and SIR models were used for analysis of scientific information diffusion. The study was conducted using semi-experimental method on 147 faculty members in three stages including evaluation of current status at time t0, after implementation of intervention of models including susceptible, infected (informed) and recovered (information saturation). Using statistical methods, chance of disease transmission from each compartment to the next one was measured. Findings: Research findings suggested feasibility of SIS, SI, and SIR models in describing information diffusion process. People who are susceptible to scientific information will not remain in a constant state after receiving information. So that 51.6% of the people remain in a state of informed and 39.1% return to susceptible conditions. Also, only 9.3% of people will switch to saturated and unnecessary conditions. Conclusion: Application of models of epidemics spread and its extension to scientific information diffusion is accurate. In addition, mostly individuals will remain at constant state after receiving scientific information

Prognosis of patients with severe burns based on plasma base excess and serum lactate level and comparison with ABSI

Background and Aim: This study was aimed to evaluate the prognosis of patients with severe burns by measuring the plasma base excess and serum lactate levels and comparing it with the ABSI scoring system as an important indicator in the resuscitation of burn patients.Methods: This prospective cohort study was performed on all patients hospitalized in the burn ward of the hospital. The demographic data and ABSI scoring of all patients were recorded. Patients' clinical information and routine tests, gasometry (for measuring plasma base excess) and serum lactate levels were measured at the time of admission, 12 hours, and 24 hours after admission.Results: A total of 311 burning patients were evaluated in this study. Mann-Whitney test showed a significant difference in the mean plasma BE1 (at the time of admission) and BE2 (24 hours after admission) between the patients who were discharged and the patients who died (P <0.001). The results indicated a difference in the process of lactate changes between two groups of patients in terms of intensity of ABSI(P <0.001). The multivariate logistic regression with the entry of BE and lactate at the time of admission and ABSI as predictive variables indicated a significant BE and ABSI.Conclusion: The results of this study confirmed that the plasma base excess can be used as a valuable tool in the monitoring of burn patients' resuscitation along with clinical criteria. On the other hand, the ABSI scoring system is still a valuable tool to predict the deaths of burn patients

Mapping Global Research in Emergency Medicine; a Bibliometric Analysis of Documents Indexed in the Web of Science Database

Introduction:Emergency medicine is a relatively new and rapidly growing specialty, and its research monitoring is important for future policies. This study aimed to analyze the published literature related to emergency medicine, to create a documented research perspective for this field. Methods: This research is a bibliometric study that analyzes the research outputs of the subject area of emergency medicine indexed in the Web of Science database from the beginning to 2023. VOSviewer software was used to visualize and predict the trends in research on the topic. Results: The findings showed that the University of California, The Journal of Neurotrauma and Brain Injury, Elsevier, and the USA were the most prolific units in the cycle of scientific productions in the field of emergency medicine. Results showed that most scientific productions in this field fall into 6 clusters: psychological impressions, injuries caused by traumatic events and the effects of traumas on children, pathophysiology and nervous system issues and related diseases, complications of traumatic events and injuries, biomechanics and complications caused by sports injuries, and consciousness. Conclusion: In addition to interventions and clinical complications, research in the field of emergency medicine has also focused on psychological structures. So, based on various measurement indicators, the subjects of this field have been the focus of researchers' attention

Co-Authorship patterns and Topic Networks in the Scientific Publication of Hamadan University of Medical Sciences

Introduction: Scientific co-operation is a process in which two or more authors share their resources and talents with the aim of creating a shared work. One of the forms of scientific co-operation is co-authorship that involves the production of a scientific output by several collaborative researchers and scholars. This research has been designed to map out co-authorship networks in the Hamadan University of Medical Sciences researches indexed in the Web of Science from 2012 to 2016, and analyzes scientific collaboration and co-authorship networks in this university. Method: The present study is an applied study which has been carried out using the scientometric indicators and social network analysis. The statistical population of this research consisted of all the scientific articles that at least one of the authors of referred to the Hamadan University of Medical Sciences as the affiliation and indexed in the Web of Science from 2010 to 2016. In so doing, the network analysis technique and the software on Citespace and Gephi were run to analyze and visualize co-authorship networks. Furthermore, the software on HISTCITE was used for data analysis. Findings: All articles related to Hamadan University of Medical Sciences during the years 2012 to 2016, based on a search on the Web of Science, have 838 records. The dominant co-authorship pattern in these years is the 4 and 5 authors with 171 articles and 20.41%. The mean number of authors or collaboration index in the period considered was 5.51, the degree of Collaboration was 0.99 and the Collaborative Coefficient was 0.759. Poorolajal, Alikhani and Shahidi were the most prolific authors. Tehran University of Medical Sciences, Shahid Beheshti University and Islamic Azad University were the most prolific organizations. The greatest collaboration of Iranian researchers has been with Switzerland. Saidijam, Mahjub, Mehdizadeh, and Moghimbeigi have alloacated the highest betweenness centrality, whereas Saidijam, Mahjub, Hajilooi, and Khazaei have allocated the highest degree centrality. Conclusion: The scientific production of Hamadan University of Medical Sciences during the period from 2012 to 2016 has grown dramatically, and collaborative research at this university is growing at an appropriate level. In this study, the degree of Collaboration and the co-operation rate are high which indicates that here is a great deal of interest in co-authorship and co-operation among researchers of Hamadan University of Medical Sciences, and it is relatively unlikely to see single-authorship, which reflects the willingness of individuals to co-authorship