Reading Stockholm Riots 2013 in social media by text-mining

The riots in Stockholm in May 2013 were an event that reverberated in the world media for its dimension of violence that had spread through the Swedish capital. In this study we have investigated the role of social media in creating media phenomena via text mining and natural language processing. We have focused on two channels of communication for our analysis: Twitter and Poloniainfo.se (Forum of Polish community in Sweden). Our preliminary results show some hot topics driving discussion related mostly to Swedish Police and Swedish Politics by counting word usage. Typical features for media intervention are presented. We have built networks of most popular phrases, clustered by categories (geography, media institution, etc.). Sentiment analysis shows negative connotation with Police. The aim of this preliminary exploratory quantitative study was to generate questions and hypotheses, which we could carefully follow by deeper more qualitative methods.Comment: 5

The Effect of the Cash Flow Sensitivity to Institutional Ownership on the Level of the Companies’ Cash Holding in Iran

The main purpose of this study is to study the influence of the cash flow sensitivity to the institutional ownership on the level of cash holding among listed companies in Tehran Stock Exchange. Accordingly, to test the research hypotheses, financial data of 69 companies which published their financial statements during a five years period 2008-2012, were selected by using the systematic classified sampling. The variation of cash in the current year to the previous year was used as cash flow and level of the cash holding upon the past study of Bao et al. (2012). The selected approach was based on the mixing of the modulated data and the regression method of the merged least squares. The results from the research hypothesis test shows that the sensitivity of the cash flow to the institutional ownership has a reverse effect on the variations of the level of cash holding

The role of media in attracting audiances for public library:A case study on public libraries of Tehran (I.R.Iran)

This study was aimed to evaluate the role of advertising in attracting audience for libraries affiliated to Iranian public libray institute based on the AIDA model in Tehran. This study was applied in terms of purpose and was analytical-survey research from the field studies branch in terms of the method. This study was conducted based on the AIDA model and the population consisted of members of public libraries affiliated to Tehran public library institute during the period from October 2015 to October 2016. The total number of public libraries\u27 members in Tehran was 39085 people. 379 people were selected as the sample based on the Cochran formula. The sampling method was stratified random based on the education component. The data were collected using a researcher-made questionnaire by modeling Jamili brothers, Rabiee and Mohammadian questionnaire (2011). The data were analyzed by SPSS Softwwere in two levels of descriptive and inferential statistics. 338 questionnaires were returned from 379 studied samples. The results showed that advertising of Iranian public libraries was fauiled to pass the levels of AIDA model in Tehran. But it had the effectiveness lower than average. The results show that unawwereness of community about the libraries with diverse services and easy use has led to a gap between libraries and community in general and potential users in particular. One of the essential causes of the advertising inefficiency was excessive concentration of advertising on the library itself (location). The opinions of the public libraries\u27 members in Tehran city show that unawwereness about the existence of the library and the various services that can be provided even has led to a gap among members. Therefore, Iranian public library institute in general, provincial general offices and cities secondarily, and in particular libraries themselves should use all their facilities to remove the barriers of the distance between the referees and the libraries. This problem can be solved to a large extent by extensive advertising

Exploring Successful Small Urban Spaces’ Criteria with Emphasis on Cultural Context

In the crowded cities of the present age, public spaces can provide a quiet area away from the hustle and bustle of the city that citizens can interact with by incorporating utility features and meeting human needs and Relax there. Small urban spaces are among the most important and effective urban spaces to achieve this goal. Because these spaces due to their small size and lower costs (compared to larger spaces) for construction can be created in large numbers and distributed throughout the city. In this way, citizens will be able to reach a public urban space on foot in a short time. If these spaces are well designed, they can encourage people to stay in and interact with each other. It is not difficult to identify and experience high-quality successful places, but identifying the reasons for their success is difficult and even more difficult, understanding if similar spaces in other places can be considered successful. This question is important because public space with deep social content is considered a cultural product. Public space is the product of the historical and socio-cultural forces of society. Therefore, one of the most important issues that should be considered in the study of public spaces and the reasons for their success is the cultural context. In Iranian cities that have been influenced by the values and principles of Islam, recognizing Islamic principles and their role in shaping public spaces can lead us to desirable results. The purpose of this article is to develop a conceptual model of successful small urban spaces with an emphasis on cultural issues, especially in Iranian-Islamic cities. In this regard, the effective criteria for the success of urban spaces in general and small urban spaces in particular in the two categories of Western countries and Iranian Islamic cities were examined and then, taking into account the criteria derived from cultural theorists, the conceptual model of research with 38 sub-criteria is provided

The role of media in attracting audiances for public library:A case study on public libraries of Tehran (I.R.Iran)

This study was aimed to evaluate the role of advertising in attracting audience for libraries affiliated to Iranian public libray institute based on the AIDA model in Tehran. This study was applied in terms of purpose and was analytical-survey research from the field studies branch in terms of the method. This study was conducted based on the AIDA model and the population consisted of members of public libraries affiliated to Tehran public library institute during the period from October 2015 to October 2016. The total number of public libraries\u27 members in Tehran was 39085 people. 379 people were selected as the sample based on the Cochran formula. The sampling method was stratified random based on the education component. The data were collected using a researcher-made questionnaire by modeling Jamili brothers, Rabiee and Mohammadian questionnaire (2011). The data were analyzed by SPSS Softwwere in two levels of descriptive and inferential statistics. 338 questionnaires were returned from 379 studied samples. The results showed that advertising of Iranian public libraries was fauiled to pass the levels of AIDA model in Tehran. But it had the effectiveness lower than average. The results show that unawwereness of community about the libraries with diverse services and easy use has led to a gap between libraries and community in general and potential users in particular. One of the essential causes of the advertising inefficiency was excessive concentration of advertising on the library itself (location). The opinions of the public libraries\u27 members in Tehran city show that unawwereness about the existence of the library and the various services that can be provided even has led to a gap among members. Therefore, Iranian public library institute in general, provincial general offices and cities secondarily, and in particular libraries themselves should use all their facilities to remove the barriers of the distance between the referees and the libraries. This problem can be solved to a large extent by extensive advertising

The Effect of in Vitro Sample Preparation Methods on Bond Strength of Mineral Trioxide Aggregate to Root Dentin

Introduction: The aim of this study was to compare the effect of sample preparation methods on push-out bond strength of mineral trioxide aggregate (MTA). Methods and Materials: Twenty-four extracted human mandibular premolars with single root canal were selected for this in vitro study. After instrumentation, irrigation and drying of root canals, they were randomly divided into two experimental groups (n=12). Group 1: After removing the 3 mm of root ends, 2 mm thick sections were established from the remaining roots. MTA was mixed following the manufacturers’ recommendations and root sections were filled. Group 2: The whole root canal was used for filling and packing of MTA and like group 1, after removing the 3 mm of root ends, root sections were provided. Push-out bond strength was measured and analyzed by the independent t-test. Level of statistical significance was set at 0.05. Results: The highest mean push-out bond strength was in apical section of group 2 (4.86±1.31) and the lowest value was in coronal section of group 2 (3.05±1.15). The results of the independent t-test showed a significant difference between two groups only in the apical section (P=0.02). Conclusion: Based on the results of this in vitro study, the highest mean push-out bond strength was in apical section of group 2. It seems that using the whole root canal for MTA application is better for MTA in vitro analysis of bond strength to root dentin because it is more similar to the clinical conditions.Keywords: Bond Strength; Endodontics; Mineral Trioxide Aggregate; Root Denti

Determination of some physical properties of virgin olive fruits

Information on physical properties of virgin olive fruit, especially those grown in Iran,arenot available in literatures. Some physical properties of Mari variety of virgin olive fruits,namely: dimensional properties (length, width, thickness, arithmetic mean diameter, geometric mean diameter, sphericity, volume of the fruit, surface area and projected area), gravimetric properties(unit mass of fruit, 1,000 fruit mass, bulk density, true density and porosity), frictional properties (angle of repose and coefficient of friction), modeling dimensional properties and mass (using normal distribution) were studied. Also sphericity, volume, surface area and projected area were calculated using different theoretical equations. Length, width and thickness of fruits ranged from 18.46 mmto 27.63 mm, 15.80 mmto 21.99 mm and 14.77 mm to 20.33 mm, respectively. Bulk density of fruits increasedfrom 590.78 kgm-3 to 646.51kgm-3 as the volume container increased from 500 ml to 2,000 ml and true density of 1,059.14kgm-3were obtained. The highest value forangle of repose and coefficient of friction amongplywood, rubber, iron and galvanized surfaceswererecorded for iron surface and the lowest value was recorded for galvanized surface.   Keywords: normal distribution, dimensional properties, gravimetric properties, frictional properties, modelin

Probabilistic Load Flow based on Parameterized Probability-boxes for Systems with Insufficient Information

The increased penetration of intermittent renewable energy sources and random loads has caused many uncertainties in the power system. It is essential to analyze the effect of these uncertain factors on the behavior of the power system. This study presents a new powerful approach called probability-boxes (p-boxes) to consider these uncertainties by combining interval and probability simultaneously. The proposed method is appropriate for problems with insufficient information. In this paper, the uncertainty of distribution functions is modeled according to the influence of natural factors such as light intensity and wind speed. First, the p-boxes load flow problem is studied using an appropriate point estimation method to calculate statistical moments of probabilistic load flow (PLF) outputs. Then, the Cornish–Fisher expansion series is used to obtain the probability bounds. The proposed approach is analyzed on the IEEE 14-bus, and IEEE 118-bus test systems consist of loads, solar farms, and wind farms as p-boxes input variables. The obtained results are compared with the double-loop sampling (DLS) approach to show the proposed method’s precision and efficiency.©2021 The Authors. Published by IEEE. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/This work has been funded by Academy of Finland (Grant Number: Profi4/WP2)fi=vertaisarvioitu|en=peerReviewed

Magnetized inulin by Fe3O4 as a bio-nano adsorbent for treating water contaminated with methyl orange and crystal violet dyes

Current work focuses on fabricating a new bio-nano adsorbent of Fe3O4@inulin nanocomposite via an in-situ co-precipitation procedure to adsorb methyl orange (MO) and crystal violet (CV) dyes from aqueous solutions. Different physical characterization analyses verified the successful fabrication of the magnetic nanocomposite. The adsorbent performance in dye removal was evaluated by varying initial dye concentration, adsorbent dosage, pH and temperature in 5110 mg/L, 0.10.8 g/L, 111 and 283 – 338 K, respectively. Due to the pH of zero point of charge and intrinsic properties of dyes, the optimum pHs were 5 and 7 for MO and CV adsorption, respectively. The correlation of coefficient (R2) and reduced chi-squared value were the criteria in order to select the best isotherm and kinetics models. The Langmuir model illustrated a better fit for the adsorption data for both dyes, demonstrating the maximum adsorption capacity of 276.26 and 223.57 mg/g at 338 K for MO and CV, respectively. As well, the pseudo-second-order model showed a better fitness for kinetics data compared to the pseudo-first-order and Elovich models. The thermodynamic parameters exhibited that the dye adsorption process is endothermic and spontaneous, which supported the enhanced adsorption rate by increasing temperature. Moreover, the nanocomposite presented outstanding capacity and stability after 6 successive cycles by retaining more than 87% of its initial dye removal efficiency. Overall, the magnetized inulin with Fe3O4 could be a competent adsorbent for eliminating anionic and cationic dyes from water

Prediction of general self-efficacy of Allameh Tabatabaei University students based on their life quality

This study aims to predict general self-efficacy of Allameh Tabatabaei University students based on the quality of their lives. To achieve this purpose, 230 students were selected by multi-stage random sampling method among the students of Economics, Literature and Foreign Languages, Law, Political Science, Social Science, Management, Accounting, Psychology and Educational Sciences. The research method was based on correlation. Participants were tested using quality-of-life (SF-36) and general-self-efficacy (GSE) questionnaires. Statistical analysis was carried out employing multivariate regression. The results showed that there is a positive correlation between general self-efficacy and students’ quality of life components like public health, mental health, happiness-vitality and physical functioning, and there exists a negative correlation between bodily pain and general self-efficacy