bluuebunny/crossref_metadata_2025 huggingface dataset:
Effectiveness of Group Logotherapy on Improving the Quality Of Life in menopausal women
Authors: Amirifard Farnoosh , Yahyayie Ghorbanali
Published: January 2022

The main objective of this article is studying the effectiveness of group logotherapy in improving the quality of life in menopausal women. The research method is quasi-experimental with pretest and posttest and control group. The statistical population of this study is all menopausal women (50 ones) who went to Social Security clinic in Bandar-e Anzali to receive medical care and counseling in 2015. Simple random sampling was used for selection of the sample members. 30 women were randomly selected. Then using lottery, 15 women were placed in the experimental group and 15 ones in the control group. The group logotherapy training program was given in 10 sessions of 90 minutes to the experimental group while the control group did not see any particular training and responded positive to the World Health Organization and Life Quality Questionnaires. Mancoa Test in SPSS 19 software was used in order to analyze the data. The results showed that there was a significant difference between experimental and control groups in terms of quality of life (P<0.0001and F=34.79). Overall results showed that the difference between experimental and control groups are in favor of the experimental group. According to the results, it can be said that that group logotherapy can be a useful and new strategy in improving the quality of menopausal women’s life.
The impact of ownership structure and bank loans on listed firms investment in Tehran Stock Exchange (TSE)
Authors: Mohammdi Faezeh , Ehteshami Ali
Published: January 2022

There are different theories in investigating and explaining the association between financing through debt and investment. Various experimental articles have studied this relation and the factors influencing it. In this study, we investigate the relationship between financing activities through bank loans and the listed companies investment in TSE. We divide the companies into two groups according to the ownership structure: companies with state ownership and non-state ownership. We have utilized the information related to 104 listed companies in TSE for the fiscal year 2008-2014. The research is descriptive-applied and ex-post facto and the combined multi-variable regression has been used to test research hypothesis. The results show that the receivable loans ratio has a negative association with the company’s investment ratio and this association is stronger for the companies with non-state ownership. As well, it can be said that companies having less investment ratio due to the projects with positive NPV, have more opportunities to growth according to Myers viewpoint.
The harmony between architectural forms and structural
Authors: Ghorbanzadeh Mojgan
Published: January 2022

The Burj Khalifa Tower is the world’s tallest structure, passing all previous height records such a project by necessity requires pushing current analysis, material, construction technologies, and building systems to literally new heights. However, as such a building height has never before been attempted, it is also necessary to ensure all technologies and methods used are of sound development and practice. As such, the designers sought to be able to use conventional systems, materials, and construction of aerodynamic shaping and wind engineering played a major role in the architectural massing and design of this multi-use tower, where mitigating and taming the dynamic wind effects was one of the most important design criteria set forth at the onset of the project design. This paper provides brief description of the tower structural systems, focuses on the key issues considered in construction planning of the key structural components and briefly outlines the execution of one of the most comprehensive architectural forms and structural in tall buildings.
Technical validation of design of zero energy building in Ahvaz city based on reliability
Authors: Sadat Mohammad Amin Mousavi , Shourkaei Hosein Mohammad Nezhad , Soleiman Sudabeh
Published: January 2022

High value of energy, limitation in primary resources of common energy and increasing energy consumption in building have enticed the researchers to use renewable energy sources and provide the required energy of building including lighting, heating and cooling and this trend was developed to provide all the required energy of building. Establishment of zero energy building in terms of type of materials, site and construction, height and type of heating and cooling systems based on climatic conditions is an unknown factor being evaluated in this paper. The best technical design was extracted using AutoCAD software and analytic software of Design builder. To select the size of system, System Advisor model (Sam) software was applied. The software model of solar cooling system was simulated using PISTACHE software. By technical evaluation by numerical and software method, the best technical design was selected in a building with commercial use with the total area of 1500 m2 and total land 460 m2 with 15 commercial units (two-story), the main steps were taken to achieve the purpose of study.
Effect of hole diameter on ultimate bearing capacity of hollow-core slabs by finite element method
Authors: Maleknia Muhammed , Modaraei Ataollah Hajati , Radmehr Mostafa
Published: January 2022

In recent years, extensive studies have been conducted on the load bearing and main members of reinforced concrete structures such as concrete beams, columns and slabs under shear, bending and even torsion to determine the ultimate bearing capacity of the members. Despite extensive research in these areas, little research activities have been done on a type of slab called hollow-core concrete slab. Also, the effect of hollow-core hole diameter on the volume of concrete placing, weight of the slab and consequently, of the entire structure, as well as the cost of construction and finally, the ultimate bearing capacity of hollow-core slabs is a fundamental issue that seems inevitable. Considering the importance of the above-mentioned issues, this paper examines the effect of hole diameter on the ultimate bearing capacity of hollow-core slabs using the finite element method. For this purpose, at first, the hollow-core concrete slab was modeled in in ANSYS software and then, for problem validation, it was compared with the laboratory model. After validation, the parameter of hole diameter was changed and the obtained results were evaluated. It should be noted that the changes was applied on four hollow-core slab of 1.5, 4, 6 and 9 m long shown in the studies. The maximum hole diameter of the slab can be used to reduce the weight of the slab and optimize the sections. This is because the ultimate bearing capacity of the hollow-core slab does not change as the diameter of the hole is reduced. In other words, by reducing the hole diameters in hollow slabs, their ultimate bearing capacity does not increase.
Investigating the relationship between marketing mix of Parsian banking services and customer loyalty according to the mediating role of customer satisfaction
Authors: Sohrabi Abulfazl , Khanbolooki Sadaf , Ghazavi Toktam
Published: January 2022

Today, many economic sectors such as banking industry have understood the necessity of paying due attention to customers. Retaining and attracting customers is an important factor for the success and achievement of competitive advantage. The present study aimed to investigate the relationship between marketing mix of Parsian bank banking services and customer loyalty considering the mediating role of customer satisfaction. The research method in this study is quantitative-inductive. Findings are obtained with regard to the views of 388 customers of Parsian bank branches in Tehran. Data analysis is done using confirmatory factor analysis and process analysis of covariance structures (structural equation modeling). The results of this study indicate that the measurement tool is reliable and valid and the research model has a good fit. The marketing mix has a significant positive effect on customer loyalty through customer satisfaction both directly and indirectly.
A framework to achieve dynamic model of cyber battlefield
Authors: Shakibazad Mohammad , Rashidi Ali Jabar
Published: January 2022

With fast growth of cyber space and related network infrastructures, it is important to detect the intrusion and respond to it in a timely manner. Cyber-attacks are in progress and are becoming more complex, as a result, more sensitive and more difficult to defend cyberspace. To determine the best response to cyber-attacks and cyber protection are cyber situation awareness. To achieve this goal, we require a framework to provide the possibility of cyber maneuvers. In this research running cyber maneuvers by simulating the dynamic cyber battlefield. Cyber battlefield contains the information necessary to detect cyber incidents. This paper aims to present a novel method for integrated model of cyber battlefield. It is necessary to execution cyber maneuvers to achieve cyber situation awareness. In this cyber defense model, situation awareness presents useful information (in a real time) to the analyst cyber space. The present study presents a framework of cyber situation awareness for accurate inspection of the current situation of cyber battlefield and cyber maneuvers. This method would be successful in exposing cyber threats for timely response.
Developing a New Weighted Voting Algorithm based on Markov Model
Authors: Norouzifar Omid , Kazemi Manouchehr , Senejani Mahdieh Nadi
Published: January 2022

Voting algorithms play a significant role in most fault-tolerant and control systems so these algorithms are continually in progress and with regard to specific situations in different systems, new voting algorithms are growing and increase the reliability and fault tolerability of systems. In this paper, a new combined algorithm using a weighted voter based on Markov chain is presented that is increased the reliability of system than both of median voter and average voter. In this paper, the proposed algorithm on average weather data of a year in Tehran was tested and simulation results show the effectiveness of the method than the other methods.
Modeling and simulation of photovoltaic systems and responsive loads in smart grid
Authors: Mirhabibi Hamed , Hakimi Seyed Mehdi
Published: January 2022

In this paper, the methods of forecasting output at different times and applications within the smart grid photovoltaic system (PV) systems will be investigated method of calculations used in this short amount of solar radiation to consider the reduction in average for a few hours to compensate for power fluctuations and power reserve or battery operation and supply and demand balance is forecast. In this paper, the Monte Carlo simulation is used to predict the long-term average. Usually the use of the smart grid PV system problems and even load variation problems within the system are accountable in this study, and surpassed Weather amount of output power into a smart grid system used pv is the case in the field of innovation and new research in this paper uses three software HOMER, GAMS and MATLAB simulation of photovoltaic systems within a network smart look and accountability in the network will be supplied by the PV system will be examined.
The Application of Customer Experience Management in Agriculture Bank of Iran
Authors: Biabani Morteza , Motalebi Farshad , Mohammadi Seyed Mousa , Monfared Mohsen Davoudi
Published: January 2022

This article examined the role of customer experience management as a new method in understanding the customer satisfaction. This descriptive-analytic survey made use of library and documentary methods in order to examine the customer experience management in banks. Then, the determinants of customer experience and its role in customer loyalty was investigated. The conceptual model of this study indicated that there was a significant relationship between components of customer experience management (functional, humanic and mechanic components) and customer loyalty. Once such a useful link is established, one may argue that it will be easier to win the customers back to the bank and achieve the bank profitability. In sum, it can be stated that customer experience management provides some new features and platforms for economic firms so that they may maintain their customers and win their loyalty.
Effects of in-service training on employee empowerment of BONAB university.
Authors: Mohebinia Aram , Dadashkarimi Yahya
Published: January 2022

One of the major factors in increasing empowerment and consequently achieving the goals of organizational productivity is human resources training. The purpose of this study was to investigate the effects of in-service training on employee empowerment in bomb city universities. For this purpose, empowerment has been defined according to Wharton and Cameron and set five questions in this regard. The study population consisted of all 95 people. The number of the statistical sample was calculated through Cochrane equation to be 76 and the samples were selected by random sampling. The data for the study were collected through Whetten and Cameron questionnaire. A questionnaire was given to the sample after their reliability and validity was evaluated. The data in this study were analyzed through descriptive inferential. Thus, classification, abbreviation and interpretation of the data were conducted through descriptive statistics. Descriptive statistical methods and statistical techniques are used to test hypotheses of research and inferential statistics (Spearman correlation for the relationship between variables according to the research hypothesis of research variables and two-variable regression test) were analyzed by SPSS software. The results showed that, in terms of staff, in-service training of staff involved in the development of empowerment.
Identifying the influence of quality management of ISO 9001 on product innovation and financial turn over interfering the lack of peripheral confidence
Authors: Aghaei Ghaem , Dashtbozorg Mahmoud , Ahmadpour Maryam Bavarsad
Published: January 2022

This paper aims at identifying the influence of Quality Management of ISO 9001 on product innovation and financial turn over interfering the lack of peripheral confidence. The population includes 90 employees of industrial factories around Ahvaz and in Ahvaz-Shooshtar road who were selected through random sampling. Stability and the validity of the mentioned questionnaire were also evaluated in this research. Data analysis was performed via descriptive and inferential analysis and also SPSS18 and Lisrel 8.5 and approved by confirmatory factor and goodness of fit  for four variables. The results coming from the hypothesis test confirm the both the hypothesis and  the influence of ISO 9001 Quality Management on financial turn over and the innovation. Also the turn over itself is effective in product innovation but the inferential role of lack of peripheral confidence on ISO 9001 Quality Management on financial turnover and the product innovation was not approved.
The sensitivity of investment to cash flow impact of the investment opportunities in companies listed in Tehran Stock Exchange
Authors: Musloo Khalil Abbasi , Parhoon Mohammad Hossein
Published: January 2022

This study investigates the effect of investment opportunities and investment sensitivity to cash flows in co-pays listed in the Tehran Stock Exchange. Previous research in this area shows that investment opportunities, and affects the sensitivity of investment to cash flows. Tehran 1393-1389V in the time domain using the software brings new 3 were extracted. The results of the research showed that investment opportunities and cash flows of the sensitivity of investment firms listed in the Tehran Stock Exchange is a significant and positive impact on cash flows and, secondly, the sensitivity of investment in companies with higher investment, less than firms with lower investment opportunities.
The relationship between capital structure and accounting criteria for evaluating the performance of companies listed on the Tehran Stock Exchange
Authors: Nezhad Hashem Zeidabadi , Nasab Hosein Vosoughi , Rakhshani Mahmoodreza
Published: January 2022

Capital structure is basically a significant issue in modern financial theory which has drawn the attention of researchers within past few decades. Finance requirement results from two fact. First, value of companies creates demand for financing the purchase of new assets, increase in capacity of plant, employment of new workers, and purchase of raw materials. Second, the finance is determined in terms of financial resources. The present study aims to examine the association between capital structure and accounting and economic standards of performance evaluation of companies enlisted in Tehran Stock Exchange. The independent variable of present study is capital structure (financial leverage) and accounting standards of performance evaluation (i.e. return on assets, the rate of annual stock return, Tobin's Q ratio and the ratio of book to market value) are presumed to be dependent variables. The variable of firm size is regarded as control variable. Data collection method consists of library review and analysis of financial statements. Correlation method and multivariate regression test were used for data analysis. The results of present study suggest that there is a significantly negative association between capital structure and accounting standards of performance evaluation. In addition, the size of company has a significantly negative association with accounting and economic standards of performance evaluation of companies enlisted in Tehran Stock Exchange.
Identification of “Black Spots” without Using Accident Information
Authors: Roudini Samira , Keymanesh Mahmoudreza , Ahangar Ali Nasrollahtabar
Published: January 2022

In the present research, identification of so-called black spots with no use of accident information is investigated along “Iraanshahr-Sarbaaz-Chabahr” road in Baluchistan, Iran. First, by an overview on the road, all factors that could potentially contribute into accidents along the road were determined. Next, the road was divided into 8 sections based on uniformity and homogeneity of each section in terms of geometry and regional conditions. At each section, potential black spots were identified and questionnaires were prepared to collect opinions from 30 experts who were well-familiar with the road. The collected data was analyzed using SPSS Software, leading to the identification of black spots. Finally, the identified black spots were compared against those obtained by traffic police based on accident information.
Identification of implementable agricultural projects in the field of Ilam dam drinking water with the emphasis on sustainable development and environmental impacts.
Authors: Jamshidi Ali , Khalili Karam , Mohammadi Esfandiar
Published: January 2022

In the last decades, the lack of attention to the effects of development has led to large projects encounter serious problems due to underrate and inattention to the environment. So, in recent years, a movement has emerged towards the idea of strategic developmental impact assessment. The aim of the study is identifying and prioritizing implementable developmental projects in the area of Ilam dam water with the priority of assessing environmental impacts. The study is practical research .In regard of methodology, it is a descriptive- analytical research. Statistical sample includes two section .In qualitative section, experts familiar with the issues, problems and impacts of dam projects were used. In second section, knowledgeable experts in the field of dam catchment issues were used. Purposeful sampling was conducted in both sections. The data collection tool is questionnaire in form of open and closed questions. Data were analyzed using Lisrel tool and SPSS. Finally, 9 important factors were identified as project headlines as follows : 1.plant production projects 2: livestock production projects 3: water, soil and industry projects 4: Veterinary plans 5.forest, range land & watershed plans 6.extention-operation plans 7.Economic organizations plans 8.Production cooperatives of agricultural Engineering services plans,9-Job opportunities in agriculture plans. Also, 82headlines of developmental plan has been extracted to be assessing in the field of Ilam dam.
Investigation of the ornamentals/decorations of religious constructions located in Semnan province
Authors: Nouhifard Mina
Published: January 2022

Religious buildings of Semnan province in various areas have come to existent and eye-catching ornaments have been added. Such aforementioned religious premises have special value within Islamic architecture. It is noteworthy that such ornaments enjoy unity in ascetic sense, greatness and magnificence. The decorative and ornaments of religious building in Semnan province are amongst Iranian valuable treasures such invaluable cultural heritage and identity has been handed down from one generation to another and on such glorification path they have been affected by elements such as human labor, people beliefs, administrations and constructive materials. Semnan Jame mosque and Bayazid Bastam mosque have been decorated by enjoying Razi and Azari style of architecture. Semnan Jame mosque and Bayazid mosque are considered as buildings which have gone under some changes within various historical periods. These alterations have been effective on the type of applied ornaments. In this study the influential religious and environmental factors in a variety of religious buildings and the applicable decorative of Semnan province have been taken into great consideration. The main objective behind this research is to investigate and decode the ornamental patterns on the basis of taken images and the existing documents from religious premises situated in Semnan province. This research is an experimental/field study and the sampling approaches applied on purpose and they have been used in a few constructions with tvrshdar approach.
Analyze and prioritize strategic factors on the establishment of knowledge management in banks
Authors: Shokrollahzade Farshad , Nasab Saeed Hakami
Published: January 2022

Introduction: Knowledge management covers all process and activities related to the creation, acquisition sharing and use knowledge, skills and expertise. At the present of time, if organization does not have information and new knowledge in according with global development will not be able to make the right decision. Addressing the issue of knowledge and knowledge management it is important to have knowledge because knowledge is an ultimate competitive advantage for new origination and the key to victory and it is the only source that is difficult or even impossible to imitate and copy. Methods: This study is a descriptive survey. The study sample included all employees of Bank Hekmat Iranian are located in Tehran. According to the understanding of study population characteristics, simple random sampling method was used. In this study, on the framework Of Huang is studied:  Team working, employee involvement, employee empowerment, knowledge structure, information system, training, commitment of senior management, benchmarking, performance measurement, organizational culture. The descriptive analysis of data using descriptive statistics and then through confirmatory factor analysis using SMART PLS software to inferential analysis of the hypothesis was done. Subsidiary hypothesis were studied and tested by One-Sample T-Test. Results: The analyze performed on collated data, it was concluded that all elements of employee empowerment, infrastructure , information systems, organization culture, modeling, employee involvement, teamwork, commitment of senior managers, knowledge structure, staff training and performance measurement leads to successful implementation of knowledge management in Bank Hekmant Iranian. Prioritizing these factors, as well as to establish knowledge management model led to 1. Team working, 2. Employee involvement., 3. Employee Empowerment, 4. Knowledge structure, 5. Information System, 6. Training, 7. Commitment of senior management, 8. Benchmarking, 9. Performance measurement, 10. Organizational culture. Results of the analysis showed that the situation of organizational culture, employee empowerment and information systems infrastructure are significantly appropriate, the situation of commitment of senior management, staff training, teamwork, benchmarking and structure knowledge and performance measurement are  partly appropriate. Conclusion: Identifying factors affecting on successful implementation of knowledge management in Bank Hekmat Iranian may lead to identifying gaps in organizational knowledge, more productivity of human capital, efficient and effective learning of staff, providing more value-added services, customers and employees satisfaction, prevent the recurrence of errors, reduction duplication, saving time, stimulate motivation, creativity and innovation, and strengthening the competitive position of the bank.
Cinétique des interactions huile essentielle-antifongique
Authors: Alama Hakim El , Aissami Aicha El , Benmoussa Adnane , Said Amal Ait Haj , Arahou Moustapha , Alaoui-Faris Fatima-Ezzahra El
Published: January 2022

L’objectif de ce travail, en plus de l’étude phyto-chimique et antifongique, est d’étudier la cinétique des interactions anti-candidosiques de l’huile essentielle (H.E) de Melaleuca alternifolia et de deux antifongiques : l'amphotéricine B (Amph B) et le fluconazole (Fluc). L’huile essentielle de Melaleuca alternifolia a été extraite des feuilles et des tiges terminales à l’aide d’un dispositif de type Clevenger, analysée par chromatographie en phase gazeuse couplée à la spectrométrie de masse. L’activité anti-candidosique a été évaluée selon deux techniques ; la technique de l’aromatogramme et la technique de microdilution. La souche microbienne est un lot de l’ATCC  (American Type Culture Collection 90029) de Candida albicans. Le pourcentage et la zone d’inhibition, les concentrations minimales inhibitrices (CMI) et fongicides (CMF) et les indices de concentrations fractionnaires inhibitrices (ICFI) et fongicides (ICFF) ont été déterminés. Le rendement de l’extraction était de 1,98 %. Les composés majoritaires étaient : Le terpinène-4-ol (31,15 %), l’-terpinène (12,02 %) et le -terpinéol (8,12 %). Le diamètre d’inhibition de l’huile essentielle était de 24,52 ± 0,9 mm. Le taux d’inhibition de la pousse de Candida albicans était de 97,35 ± 2,16 %. On a noté une variation des valeurs des CMI et des CMF en fonction des concentrations d’association entre l’huile essentielle et les antifongiques étudiés. Les plus faibles valeurs des ICFI des associations H.E/Amph B et H.E/Fluc ont été respectivement 0,493 et 0,432, celles des ICFF ont été de l’ordre de 0,862 et 0,798. L’huile essentielle de Melaleuca alternifolia est un excellent fongicide. Son activité anti-candidosique majeure in vitro pourrait faire l’objet d’autres études plus soutenues in vivo afin d’enrichir l’arsenal antifongique tout en réduisant les effets médicamenteux indésirables.
Seasonal variation of community composition of zooplankton in the Palk strait, (9‐10 °N, Arabian sea, India).
Authors: Lathasumathi Chokkalingam , Escalante Patricio Delos Ríos , Kalaiarasi Mariadoss , Stella Chelladurai
Published: January 2022

The present investigation has been made to study the distribution, qualitative composition, of zooplankton from the eastern Arabian Sea of the habitat from Sundarapandian Pattinamand Manamelkudi (9° 40’ N; 69° 20’ E) along the Palk Strait of east coast of Tamil Naduduring. From July 2005 to June 2006, the zooplankton was sampled every three months for each monsoon seasons. The studied sites are located in one of the most productive zones of the world. Zooplankton species associations were studied using a null model species co‐occurrence. The results revealed the absence of regulators only for Zooplankton in station II in fixed-fixed model. In spite of these results would not agree with the literature descriptions, the cause would be the presence of many repeated species for studied sites. Ecological fisheries and resources management were discussed.
Analyse quantitative des composés phénoliques d'une endémique algérienne Scabiosa Atropurpurea sub. Maritima L.
Authors: Ali-Rachedi Fahima , Meraghni Souad , Touaibia Nourhène , Mesbah Sabrina
Published: January 2022

Scabiosa Atropurpurea sub. Maritima L. est une plante de la famille des Dipsacacée utiliséedans la médecine traditionnelle pour le traitement de certaines maladies de peau, en particulier la gale. Notre étude porte sur l’évaluation par dosage spectrophotométrique des polyphénols et des flavonoïdes. Le dosage des phénols totaux montre que la teneur la plus élevée des phénols a été mesurée dans l’extrait méthanolique, avec une valeur égale à 1,303 mg EAG/g ES, suivi par les extraits hexanique et chloroformique respectivement. Le dosage des flavonoïdes a révélé que l’extrait méthanolique renferme un maximum de flavonoïdes, avec un taux de 0,613 mg EQ/g ES. Nous avons également effectué les dosages des tanins et des anthocyanes.
History of initial fifty years of ARIES: A Major National Indian Facility for Optical Observations
Authors: Sanwal Basant Ballabh , Pandey Anil Kumar , Uddin Wahab , Kumar Brijesh , Joshi Santosh
Published: January 2022

The idea of starting an astronomical observatory in the state of Uttar Pradesh in India germinated through the initiative of a scholarly statesman Babu Sampurnanandji. His interest in astrology coupled with his academic bent of mind got him interested in modern astronomy. Being then Education Minister and later Chief Minister of Uttar Pradesh, he established an astronomical observatory at Varanasi on April 20, 1954. Later on it was shifted to Manora Peak, Nainital. Four reflectors were commissioned at Manora Peak. For solar research an H alpha petrol unit and a horizontal solar spectrograph was setup. A detailed project report for installation of a 4-m class optical telescope was prepared indigenously in late 1980, however, the project could not take off. With the generous support of the Department of Science and Technology, the institute established a 3.6-m new technology optical telescope and a 1.3-m wide field optical telescope at a new observing site called Devasthal. Now a 4-m liquid mirror telescope is also being installed at the same observing site. I present here a brief journey of the observatory beginning right from its birth in 1954 till now.
Prospects for star formation studies with infrared instruments (TIRCAM2 and TANSPEC) on the 3.6-m Devasthal Optical Telescope
Authors: Ojha Devendra , Ghosh Swarna Kanti , Sharma Saurabh , Pandey Anil , Baug Tapas , Ninan Joe Philip , Kumar Brijesh , Puravankara Manoj , D’Costa Savio , Naik Milind , Poojary Satheesha , Bhagat Shailesh , Jadhav Rajesh , Meshram Ganesh , Sandimani Pradeep , Gharat Sanjay , Bakalkar Chandrakant
Published: January 2022

We present a brief description of the activities of the infrared astronomy group of Tata Institute of Fundamental Research with special emphasis on the ground-based near infrared instrumentation for star formation studies. We describe the unique capability of TIRCAM2 for observations in the polycyclic aromatic hydrocarbon (λcen∼ 3.3 μm) and narrow-band L (λcen∼ 3.59 μm) bands, currently being used by the astronomy community, and of the upcoming TANSPEC, which is being built for India’s largest telescope, i.e. the 3.6-m Devasthal Optical Telescope (DOT). The TIRCAM2 on the 3.6-m DOT was successfully commissioned in June 2016, and the subsequent characterization and astronomical observations are presented here. Based on the successful engineering runs on the 3.6-m DOT, TIRCAM2 has been made available to the Indian and Belgian astronomical community for science observations since Early Science Cycle 2017A (May 2017) onwards. The fabrication of TANSPEC is in an advanced stage and the spectrometer is expected to be commissioned by the end of January 2018.
The BINA collaboration: science at the Royal Observatory of Belgium
Authors: De Cat Peter , Cuypers Jan , Blomme Ronny , Frémat Yves , Groenewegen Martin , Lampens Patricia , Lobel Alex , Pauwels Thierry , Van de Steene Griet , van Hoof Peter
Published: January 2022

The Belgo-Indian Network for Astronomy and Astrophysics (BINA) is a collaboration between Indian and Belgian astronomical institutes with the main aim to optimize the scientific output of the Indo-Belgian telescopes, being the 4.0-m International Liquid Mirror Telescope and the 3.6-m Devasthal Optical Telescope. These new facilities are both located at the Devasthal Observatory near Nainital, India. In this contribution, we introduce projects that are of scientific interest for colleagues of the department “Astronomy and Astrophysics” of the Royal Observatory of Belgium (ROB). It serves as an invitation for Indian astronomers to participate. We highlight how these projects could benefit from observations with the Indo-Belgian telescopes by using instruments from the first-generation (currently offered) and/or the next-generation (development or design phase). We show that, from an ROB point-of-view, the BINA would be the most successful if the 3.6-m DOT would be equipped with an efficient optical high-resolution spectrograph.
Low resolution spectroscopic investigation of Am stars using Automated method
Authors: Sharma Kaushal , Joshi Santosh , Singh Harinder P.
Published: January 2022

The automated method of full spectrum fitting gives reliable estimates of stellar atmospheric parameters (Teff, log g and [Fe/H]) for late A, F, G, and early K type stars. Recently, the technique was further improved in the cooler regime and the validity range was extended up to a spectral type of M6 - M7 (Teff 2900 K). The present study aims to explore the application of this method on the low-resolution spectra of Am stars, a class of chemically peculiar stars, to examine its robustness for these objects. We use ULySS with the Medium-resolution INT Library of Empirical Spectra (MILES) V2 spectral interpolator for parameter determination. The determined Teff and log g values are found to be in good agreement with those obtained from high-resolution spectroscopy.
Spectroscopic monitoring of bright A-F type candidate hybrid stars discovered by the Kepler mission
Authors: Lampens Patricia , Frémat Yves , Vermeylen Lore , De Cat Peter , Dumortier Louis , Sódor Ádám , Skarka Marek , Bognár Zsófia
Published: January 2022

We report on a study of 250 optical spectra for 50 bright A/F-type candidate hybrid pulsating stars from the Kepler field. Most of the spectra have been collected with the high-resolution spectrograph HERMES attached to the Mercator telescope, La Palma. We determined the radial velocities (RVs), projected rotational velocities, fundamental atmospheric parameters and provide a classification based on the appearance of the cross-correlation profiles and the behaviour of the RVs with time in order to find true hybrid pulsators. Additionally, we also detected new spectroscopic binary and multiple systems in our sample and determined the fraction of spectroscopic systems. In order to be able to extend this investigation to the fainter A-F type candidate hybrid stars, various high-quality spectra collected with 3–4 m sized telescopes suitably equipped with a high-resolution spectrograph and furthermore located in the Northern hemisphere would be ideal. This programme could be done using the new instruments installed at the Devasthal Observatory.
Asteroseismology of B and A stars combining Indian and South African resources
Authors: Engelbrecht Chris
Published: January 2022

Various strong and productive collaborations in diverse aspects of asteroseismology have been established between Indian and South African astronomers over the past 18 years. An important factor in this success has been the fusion of diverse capabilities in both instrumentation and research expertise. Past successes are very briefly summarised. A limited summary of new telescopes and instruments available in India and South Africa, respectively, is provided and future prospects are briefly summarised.
Photometric studies of two solar type marginal contact binaries in the Small Magellanic Cloud
Authors: Shanthi Priya Devarapalli , Rukmini Jagirdar
Published: January 2022

Using the Optical Gravitational Lensing Experiment catalogue, two contact binaries were studied using data in the V and I bands. The photometric solutions for the V and I bands are presented for two contact binaries OGLE 003835.24-735413.2 (V1) and OGLE 004619.65-725056.2 (V2) in Small Maglellanic Cloud. The presented light curves are analyzed using the Wilson-Devinney code. The results show that the variables are in good thermal and marginal geometrical contact with features like the O’Connell effect in V1. The absolute dimensions are estimated and its dynamical evolution is inferred. They tend to be solar type marginal contact binaries. The 3.6-m Devasthal Optical Telescope and the 4.0-m International Liquid Mirror Telescope of the Aryabhatta Research Institute of Observational Sciences (ARIES, Nainithal) can facilitate the continuous monitoring of such kind of objects which will help in finding the reasons behind their period changes and their impact on the evolution of the clusters.
Spectroscopic Study of NGC 281 West
Authors: Hasan Priya
Published: January 2022

NGC 281 is a complex region of star formation at 2.8 kpc. This complex is situated 300 pc above the Galactic plane, and appears to be part of a 270 pc diameter ring of atomic and molecular clouds expanding at 22 km/s (Megeath et al. 2003). It appears that two modes of triggered star formation are at work here: an initial supernova to trigger the ring complex and the initial O stars and the subsequent triggering of low mass star formation by photoevaporation driven molecular core compression. To get a complete census of the young stellar population, we use observations from Chandra ACIS 100 ksec coupled with data from 2MASS and Spitzer. The Master X-ray catalog has 446 sources detected in different bandpasses. We present the spatial distribution of Class I, II and III sources to study the progress of star formation. We also determine the gas to dust ratio NH/AK to be 1.93 ± 0.47 ×1022 cm−2 mag−1 for this region. In this article, we present NGC 281 as a good target to study with the 3.6-m Devasthal Optical Telescope (DOT) in spectroscopy. With these spectra, we look for evidence for the pre-main-sequence (PMS) nature of the objects, study the properties of the detected emission lines as a function of evolutionary class, and obtain spectral types for the observed young stellar objects (YSOs). The temperatures implied by the spectral types can be combined with luminosities determined from the near-infrared (NIR) photometry to construct Hertzsprung–Russell (HR) diagrams for the clusters. By comparing the positions of the YSOs in the HR diagrams with the PMS tracks, we can determine the ages of the embedded sources and study the relative ages of the YSOs with and without optically thick circumstellar disks.
Understanding of variability properties in very low mass stars and brown dwarfs
Authors: Mondal Soumen , Ghosh Samrat , Khata Dhrimadri , Joshi Santosh , Das Ramkrishna
Published: January 2022

We report on photometric variability studies of a L3.5 brown dwarf 2MASS J00361617+1821104 (2M0036+18) in the field and of four young brown dwarfs in the star-forming region IC 348. From muti-epoch observations, we found significant periodic variability in 2M0036+18 with a period of 2.66 ± 0.55 hours on one occasion while it seemed to be non-variable on three other occasions. An evolving dust cloud might cause such a scenario. Among four young brown dwarfs of IC 348 in the spectral range M7.25 - M8, one brown dwarf 2MASS J03443921+3208138 shows significant variability. The K-band spectra (2.0-2.4 m) of nine very low mass stars (M1 - M9 V) are used to characterize the water band index (H20-K2). We found that it is strongly correlated with the surface temperature of M dwarfs.
Pre-main sequence variables in young cluster Stock 18
Authors: Sinha Tirthendu , Sharma Saurabh , Pandey Rakesh , Pandey Anil Kumar
Published: January 2022

We have carried out multi-epoch deep I band photometry of the open cluster Stock 18 to search for variable stars in star forming regions. In the present study, we identified 65 periodic and 217 non-periodic variable stars. The periods of most of the periodic variables are between 2 hours to 15 days and their magnitude varies between 0.05 to 0.6 mag. We have derived spectral energy distributions for 48 probable pre-main sequence variables. Their average age and mass are 2.7 ± 0.3 Myrs and 2.7 ± 0.2 Mo, respectively.
Optical polarimetry and molecular line studies of L1157 dark molecular cloud
Authors: Sharma Ekta , Soam Archana , Gopinathan Maheswar
Published: January 2022

Filaments are omnipresent in molecular clouds which are believed to fragment into cores. The detailed process of the evolution from filaments to cores depends critically on the physical conditions in the star forming region. This study aims at characterising gas motions using velocity structure and finding the dynamical importance of magnetic fields in the filament morphology. The plane-of-the-sky component of the magnetic field has been measured using optical polarization of the background stars. The orientation is found to be almost perpendicular to the filament implying its dynamical importance in the evolution of the cloud. Optical polarimetric results match very well with the sub millimetre polarization angles obtained in the inner core regions. The magnetic fields are found to have an orientation of 130° east with respect to north. The angular offset between the outflow axis and the magnetic field direction is found to be 25°. Values for parameters like the excitation temperature, optical depth and column densities have been derived using molecular lines. Optically thick lines show non-gaussian features. The non-thermal widths tell about the presence of turbulent motions whereas the C180 lines follow Gaussian features almost at all the locations observed in the filament.
Young stellar population and star formation history ofW4 HII region/Cluster Complex
Authors: Panwar Neelam
Published: January 2022

The HII region/cluster complex has been a subject of numerous investigations to study the feedback effect of massive stars on their surroundings. Massive stars not only alter the morphology of the parental molecular clouds, but also influence star formation, circumstellar disks and the mass function of low-mass stars in their vicinity. However, most of the studies of low-mass stellar content of the HII regions are limited only to the nearby regions. We study the star formation in the W4 HII region using deep optical observations obtained with the archival data from Canada - France - Hawaii Telescope, Two-Micron All Sky Survey, Spitzer, Herschel and Chandra. We investigate the spatial distribution of young stellar objects in the region, their association with the remnant molecular clouds, and search for the clustering to establish the sites of recent star formation. Our analysis suggests that the influence of massive stars on circumstellar disks is significant only to their immediate neighborhood. The spatial correlation of the young stars with the distribution of gas and dust of the complex indicate that the clusters would have formed in a large filamentary cloud. The observing facilities at the 3.6-m Devasthal Optical Telescope (DOT), providing high-resolution spectral and imaging capabilities, will fulfill the major objectives in the study of HII regions.
Core-collapse SNe of type IIP and their progenitors: The case study of PNV J01315945+3328458
Authors: Dastidar Raya , Kumar Brijesh , Sahu Devendra Kumar , Misra Kuntal , Singh Mridweeka , Gangopadhyay Anjasha , Anupama Gadiyara Chakrapani , Pandey Shashi Bhushan
Published: January 2022

The type II supernovae (SNe) are hydrogen-rich cosmic explosions resulting from the collapse of massive stars. The impetus of studying individual events arises from its cosmological importance and the diverse understanding of the evolution and explosion mechanism of such events. In this work, we present the preliminary photometric and spectroscopic analysis of a recent type IIP explosion, PNV J01315945+3328458 in the galaxy NGC 582. While the initial phases of these energetic events are bright enough to be observed with the 1-2m class telescopes, the supernovae fade below the detection limit of these telescopes in the nebular phase. In addition, the class of sub-luminous events with Mv  -15 or the events occurring at higher redshift, fade below the detection limit of these telescopes very early in their evolution. Large aperture telescopes like the newly installed 3.6m Devasthal Optical Telescope (DOT) will ensure a longer coverage of such events and also to probe deeper into the Universe. With the 3.6m telescope installed in Devasthal (DOT), we plan to study the progenitor environment of CCSNe to infer the metallicity at the explosion site.
Scientific Summary of the First BINA Workshop
Authors: Sagar Ram
Published: January 2022

Scientific summary of the first Belgo-Indian Network for Astronomy & Astrophysics (BINA) work-shop is presented here. In the workshop, invited talks were supplemented with the contributory talks and poster paper presentations. The talks presented during the workshop provide latest information on the 3.6-m Devasthal Optical Telescope (DOT) and 4-m International Liquid Mirror Telescope (ILMT) projects. These observing fa-cilities are built jointly by the astronomical communities of India and Belgium. In the ILMT, reseachers from Canada, Poland and Uzbekistan are also actively participating. Preliminary results obtained from the on sky test indicate that 3.6-m DOT is capable of resolving binary stars separated by ~ 0.4 arc second. CCD observations obtained with the telescope indicate that atmospheric conditions at Devasthal are very good for optical observations and the site can be considered internationally competitive. Buildings and telescope houses constructed at Devasthal have not deteriorated natural seeing conditions observed at the site ~ 2 decades ago during 1997¬1999. Pointing and tracking accuracies of the 3.6-m DOT are as per specifications. All these indicate that on sky performance of the newly installed 3.6-m DOT is better than the specifications prescribed at the time of placing order. It is therefore capable of providing internationally competitive science with the modern backend instruments and also have global importance due to their geographical location particularly for the time domain and multi-wavelength astrophysical studies. A large number of talks and poster papers presented during the workshop discussed astrophysical potential of the Indian largest size (4 meter class) new technology optical telescopes located at Devasthal. All these indicate beyond doubt that there are enormous opportunities for the growth of astronomy in India.
Minéralogie du puits de recherche plomb-zinc situé près de la ferme Erlenbach à Lontzen
Authors: Blondieau Michel , Puccio Stéphane , Hatert Frédéric
Published: January 2022

Les travaux de recherches minières situés près de la ferme Erlenbach se trouvent dans le grand district Pb-Zn de l’est de la Belgique à quelques kilomètres de La Calamine, le plus gros gisement métallique non ferreux belge. La minéralogie de ce petit gite non repris par Hatert et al. (2002) fait l'objet de cet article. On y recense un peu plus d'une vingtaine d'espèces minérales. Outre les minéraux classiques des chapeaux calaminaires, on y a observé deux espèces nouvelles pour la Belgique : la coronadite et le minium, ainsi qu'une autre espèce Al-Si-Zn-O apparemment nouvelle mais qui n'a pas pu être déterminée.
Charles Pecher et Edgar Sengier
Authors: Lucas Amand
Published: January 2022

Je présente brièvement les carrières contrastées de deux éminentes personnalités belges, l'une scientifique, l'autre industrielle, et leurs interactions souvent problématiques avec deux gouvernements, celui de la Belgique et celui des États-Unis, à un moment tragique de l'histoire que fut le début de la seconde guerre mondiale.