COMPRESSIVE PARAMETER ESTIMATION VIA APPROXIMATE MESSAGE PASSING

The literature on compressive parameter estimation has been mostly focused on the use of sparsity dictionaries that encode a discretized sampling of the parameter space; these dictionaries, however, suffer from coherence issues that must be controlled for successful estimation. To bypass such issues with discretization, we propose the use of statistical parameter estimation methods within the Approximate Message Passing (AMP) algorithm for signal recovery. Our method leverages the recently proposed use of custom denoisers in place of the usual thresholding steps (which act as denoisers for sparse signals) in AMP. We introduce the design of analog denoisers that are based on statistical parameter estimation algorithms, and we focus on two commonly used examples: frequency estimation and bearing estimation, coupled with the Root MUSIC estimation algorithm. We first analyze the performance of the proposed analog denoiser for signal recovery, and then link the performance in signal estimation to that of parameter estimation. Numerical experiments show significant improvements in estimation performance versus previously proposed approaches for compressive parameter estimation

The compliance of Iranian library and information science journals with Thomson Reuters’ basic standards

     Presently, journals are considered as the most important tools of information science and knowledge growth throughout the world. Due to the increase in the number of scientific journals, the selection, evaluation and determination of the authenticity of these resources by the authorized organizations has attached more significance to them. Thus, the present study aims at investigating the compliance of Iranian library and information science journals with basic standards of journal evaluation through Thomson Reuters’ viewpoint. This is an applied research, which has been conducted through comparative analysis. It evaluates the authenticity of scientific journals through four basic standards of  Thomson Reuters, namely on-time publishing of journals, observing international publishing laws, full-text in English, and peer review. The population of the research includes all the active scientific Iranian journals in the field of library and information sciences (12 journals). Results showed that the mean of correlation ratio between the studied journals and standards was 75%. On-time publishing and full-text in English were observed only in 33% and 58% of the studied journals respectively. However, observing international laws of publishing and peer review are in optimal status. Studies are needed in order to find out the compliance of the other countries’ library science journals with international standards,  (specially developing ones) to help those countries to identify the existing gaps which will assist them to present their researches in the international level through being indexed in authentic databases. Obviously more research is needed in this area, as Thomson Reuters has published standards other than the basic standards

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

Credibility of health websites on infectious diseases: Are there any fully trustable website to read on Ebola?

     When a new disease develops, people are looking for information about that disease where the internet is considered as one of the sources of health information. Beside empowering individuals to identify and select valid information, reliable and up-to-date websites should also be introduced for them. Therefore, the present study aimed to evaluate and identify the high quality websites on Ebola virus and disease. To do this study, the term "Ebola" was searched for in Google, Yahoo, and Bing search engines using the Google Chrome browser. Three pages were obtained from the search in these three selected search engines and were examined, with the exclusion of duplicate websites, non-English websites, the results related to news, images, ads, and inaccessible websites; finally, 43 websites out of the 90 retrieved websites were selected for evaluation. The research tools included the HONcode toolbar and an eight-item checklist was developed by the researchers based on the HONcode of conducts. The result showed that out of 43 websites evaluated, only 6 websites (14%) were trustable and the 86% were not approved after evaluation based on the HONcode criteria. Only 37% of evaluated websites have been considered complementarity criterion. Justifiability was the most considered criterion and 95% of evaluated websites had paid to distribute information fairly enough. Online information about Ebola is available on many websites and this information affects people's health decisions and behaviors. Physicians and other health professionals can help patients and other community members to find their needed information on infectious diseases (e.g. on Ebola) from the most reputable and valid international websites

A new methodology to study customer electrocardiogram using RFM analysis and clustering

One of the primary issues on marketing planning is to know the customer's behavioral trends. A customer's purchasing interest may fluctuate for different reasons and it is important to find the declining or increasing trends whenever they happen. It is important to study these fluctuations to improve customer relationships. There are different methods to increase the customer's willingness such as planning good promotions, an increase on advertisement, etc. This paper proposes a new methodology to measure customer's behavioral trends called customer electrocardiogram. The proposed model of this paper uses K-means clustering method with RFM analysis to study customer's fluctuations over different time frames. We also apply the proposed electrocardiogram methodology for a real-world case study of food industry and the results are discussed in details

Online Health Information Seeking Behavior among Iranian Pregnant Women: A Case Study

Objective: The present study aimed to investigate the health information seeking behavior, applicability and the evaluation of health information obtained from the Internet by Iranian pregnant women. Design and setting: The present study was descriptive-survey. The study population included 196 pregnant women in different gestational months referred to hospitals with Obstetrics and Gynecology ward in Hamadan, Iran on September and October in 2016 who were selected based on stratified random sampling method. The data were collected through a researcher-made questionnaire. Findings: Most pregnant women, while facing with pregnancy problems, seek out health information from the Internet and they often trust the information and share with their doctor. The information increases their awareness about pregnancy. Websites and social networks are two important sources in finding health information and reference of content and educated authors are regarded as two important criteria in evaluating health information obtained from the Internet. In addition, fetal development and nutrition during pregnancy were regarded as two important issues having the most searches among pregnant women. Conclusion: Internet has become a popular source for health information finding. The high importance of the accuracy of information used by pregnant women and the vulnerability of this range of society highlight the need to equip hospital libraries with update resources of the information and amenities such as suitable seats, ventilation, and the like. Using medical librarians and informants and referral of pregnant women to these libraries by a doctor or midwife in order to obtain valid information, standardization of Persian-based digital libraries related to health, introducing valid portals for pregnant women are regarded as some important issues in this regard. Familiarizing pregnant women, especially in developing countries, with various types of content on the Internet and how to find valid information by medical librarians can facilitate the access to information for pregnant women and reduce many complications raised by the lack of reliable and valid information

Relationship between entrepreneurial self-efficacy and entrepreneurial intention in medical library and information science students: an Iranian perspective

Purpose: The main purpose of this study is to investigate the relationship between entrepreneurial self-efficacy and entrepreneurial intention of students in the field of medical library and information science. Methods: This study quantitatively examined seven hypotheses through Structural Equation Modeling (SEM) techniques. Using the census method, 79 students of medical library and information science of Hamadan University of Medical Sciences, Iran, were studied. Data was collected using the Entrepreneurial Self-efficacy Questionnaire proposed by De Noble et al. (1999) and the Entrepreneurial Intention Questionnaire presented by the Linan and Chen (2011). Descriptive and inferential data analysis was performed using SPSS and SmartPLS2 software at a significance level of 0.05. Results: The results showed that the variable of entrepreneurial self-efficacy and the components of initiating investor relationships and developing human resources affect the entrepreneurial intention of students, while the components of Understanding market opportunities, building an innovative environment, defining core purpose, and coping with challenges had no effect on entrepreneurship. The entrepreneurial intention of medical library and information science students is positively affected by their entrepreneurial self-efficacy. Greater self- efficacy leads to entrepreneurship. Practical implications: Considering the positive effect of entrepreneurial self-efficacy on students\u27 entrepreneurial intention, offering training courses to strengthen entrepreneurial behavior in the academic period seems useful. Originality/value: Entrepreneurship helps communities achieve social and economic growth. Entrepreneurial intention is one of the important factors in the occurrence of entrepreneurial behavior in students. Entrepreneurial Self-efficacy is a key factor in shaping and strengthening entrepreneurial intention. Given the increasing number of library and medical information science graduates and the relatively limited job market in this field, it seems useful to examine their entrepreneurial intention and the impact of social factors affecting it. Keywords: Entrepreneurial Self-efficacy, Entrepreneurial Intention, Medical Library and Information scienc

Towards Non-Spontaneity in Interpretation of Implicature Serving Implicit Characterization: The Case of Subsidiary Trait Precipitation in Arthur C. Doyle’s ‘A Study in Scarlet’

Although characterisation is a much-aged matter in literature, certain aspects have yet to be explored, such as how fictional characters implicate in their discourse, what takes influence from this, and what comes to pass in the production and interpretation process of the phenomenon. As the contribution is of subtlety, implicata in characters’ discourse have not exclusively been studies in detail as elements of characterisation. Therefore, in view of the cognitive approach leant towards by leading researchers on the subject of characterization such as Jonathan Culpeper, this research relies on Sperber and Wilson’s ‘relevance theory’ to define cognitive procedures into instances of implicata verbally exchanged between fictional characters to determine a) how authors exploit such instances for trait progression of their characters and upholding character discourse credibility, and b) how readers can achieve what Furlong terms a ‘non-spontaneous’ interpretation of such exchanges. To address the stated issue, we conducted a detailed cognitive-effectual analysis on five instances of implicata made by four flat and round characters within Arthur C. Doyle’s ‘A Study in Scarlet’, the results of which yielded a mechanism wherein writers’ making implications and readers’ calculating and interpreting them hinge on both parties making presuppositions on certain topics to ensure certain pragmatic presuppositional effect for readers. A five-stage bottom-up process was also proposed which links character traits to implications conveyed within inter-character discourse, following through which can lead to readers’ achieving maximal relevance on the made implications and a non-spontaneous interpretation of them

Time-Discontinuous Finite Element Analysis of Two-Dimensional Elastodynamic Problems using Complex Fourier Shape Functions

This paper reformulates a time-discontinuous finite element method (TD-FEM) based on a new class of shape functions, called complex Fourier hereafter, for solving two-dimensional elastodynamic problems. These shape functions, which are derived from their corresponding radial basis functions, have some advantages such as the satisfaction of exponential and trigonometric function fields in complex space as well as the polynomial ones simultaneously, that make them a better choice than classic Lagrange shape functions, which only can satisfy polynomial function field. To investigate the validity and accuracy of the proposed method, three numerical examples are provided and the results obtained from the present method (complex Fourier-based TD-FEM) and the classic Lagrange-based TD-FEM are compared with the exact analytical solutions. According to them, using complex Fourier functions in TD-FEM leads to more accurate and stable solutions rather than those obtained from the classic TD-FEM