bluuebunny/crossref_metadata_2025 huggingface dataset:
Educating and Empowering Teen Activists in Public Libraries: A Case Study of the Impact of Reading on Young Adult Social Justice Actions
Authors: McDevitt Jennifer
Published: May 2021

This participatory case study, which consisted of a co-designed virtual program through the Camrose Public Library, investigates how teen readers engage with the social justice themes in YA fiction, how and if they find these themes useful for understanding and engaging in activism on their own, and the influence of public library programming on these actions. I approached my research from a teen-centred perspective, inviting the youth who participated to make adjustments to each stage of the process. My research design, data collection, and data analysis were informed by critical ethnography as theory and reader-response theory. This case study found that, on their own, neither social activism narratives nor library programs motivate teens to conduct social justice actions; instead, they contribute to a network of learning opportunities and information that leads to teens becoming motivated to make a difference in their communities. Thus, public libraries can provide teen programming that uses social activism narratives and collaborative discussions to teach teens more about social justice issues, show them how to get involved in social justice movements, and instill in them the confidence to do so.
From “a great counter attraction to the ale-house and low music hall” to “the one place everybody goes”
Authors: Beraldo Sofia , Coubry-Forte Chelsea , Desjardins Katrina , Isings Erin , McCandless Kate , McKenzie Pam
Published: May 2021

Canadian public libraries espouse a set of values that may not be congruent (e.g., preserving “high” culture vs providing access to inclusive collections). Tension or conflict can result when stakeholders emphasize different values, so it is crucial to attend to values in stakeholder accounts, including those in the mass media. This poster presents a) emerging findings from a study of the representation of public libraries in The Globe and Mail since 1860; and b) reflections on the research and research communication process as an innovative experiential learning opportunity for the interdisciplinary team of faculty, graduate, and undergraduate students.
Many Paths
Authors: Roberts Linds
Published: May 2021

Curiosity is seen as an integral part of information-seeking, including the power to transform, innovate, and synthesize, as well as the power to disrupt. While there is consensus that curiosity is vital to learning, innovation, and transformative change, scientists have yet to agree on definitions or categories of curiosity, and little is known about how best to engage learners’ curiosity in academic libraries. This paper presents interview findings with 41 transfer students. Students reflected on their experiences with libraries and on moments when they felt intensely curious or passionate about learning. Findings indicate that students’ curiosity ignites through ideas, hands-on learning, interpersonal, and lived experiences. Implications follow for library workers to consider how curiosity is framed within their institutions and intentionally cultivate learners’ curiosity.
Citizens’ Right to Privacy and Right to Information Access in Smart Cities: Evaluating the Smart City Initiative of West Baltimore
Authors: Park Sunyup
Published: May 2021

This paper will detail smart city initiatives in West Baltimore and evaluate different approaches to ensure the right to privacy and the right to information access of lower-income communities of color. After evaluating these approaches, this paper proposes recommendations to facilitate the right to privacy and the right to information access in lower-income communities.
Aha! Librarians’ predisposition for information encountering and serendipity in the workplace
Authors: Agarwal Naresh Kumar , Huang Yuan Ho , Erdelez Sanda
Published: May 2021

It is not clear if people’s high propensity for information encountering translates to organizational work settings. We investigate the relationship between individual predisposition for information encountering with the frequency of individual information encountering at work. Through a survey of 274 medical librarians of the top 100 medical schools, we found that individual information encountering was a significant predictor of information encountering at work. This finding helps information behavior researchers discover the transfer of behaviors from everyday-life to organizational environments. It brings attention to the need for greater support for information encounters at work, which may enhance their contribution to the organizational objectives.
Naming patron-perpetrated sexual harassment in libraries
Authors: Oliphant Tami , Allard Danielle , Lieu Angela , Mallach Karla
Published: May 2021

Patron-perpetrated sexual harassment (PPSH) is increasingly recognized as a significant problem in the field of library and information studies (LIS) but is often described and treated as “unfortunate” and “part of the job.” The results from a large-scale survey (505 responses) where participants described incidents of PPSH in the workplace support widely held public statements that define PPSH as a form of gender-based violence (GBV), insisting that it must be named and treated as such. Naming PPSH as sexual harassment and a form of GBV has important implications for library workers, library workplaces, and the broader field of LIS.
Information Literacy from High School to University
Authors: Cavanagh Mary , Oberg Dianne , Buchansky Heather , D'Avernas Marc , Johnson-McGregor Kate , Roberts Sarah
Published: May 2021

The Ontario School Library Impact Project (OSLIP) investigated the impact of school libraries on the development of key information literacy skills in students entering post-secondary education, using online surveys and qualitative interviews. The project found that first-year university students are challenged by the demands of post-secondary course research assignments. These findings support previous research indicating first-year university students are challenged by new demands for research skills. Unfortunately, opportunities to develop those skills are inconsistent among school boards in Ontario. This is a multifaceted problem confronting both school librarians and academic librarians as well as their teaching partners.
Is Archival Scholarship for Everybody?
Authors: Olson Lisa , Audas Jordan , Bourret Grace , Fitzgerald Kendell , Roeschley Ana , Mongeon Philippe
Published: May 2021

Analyzing over 7000 academic journal articles spanning four decades, this research uses bibliometric methods to assess the hypothesis that the archival field is a feminized discipline. First, an explanation of our dataset is presented, followed by the results of the proportion of men and women amongst the authors for which we were able to assign a perceived gender. This analysis shows a gradual rise of female-perceived authorship. We then compare these results to the differences in citations between papers with female and male first authors, which shows no clear trend.
#LibraryLife: A quantitative analysis of social media usage, content, and engagement at the Vancouver Public Library
Authors: Vander Kooy Sam
Published: May 2021

This paper explores the contents of the Vancouver Public Library’s Facebook, Instagram, Twitter, and YouTube feeds between September 1st and November 30th, 2020 to better understand how each social media platform is being used to communicate with stakeholders. This quantitative content analysis of each platform’s usage, content, and engagement highlights some important trends libraries should be aware of concerning both the use of multiple social media platforms and the evaluation of their current social media strategies.
whole new world
Authors: Vander Kooy Sam
Published: May 2021

This poster will present the results of a thematic analysis of the contents of the Vancouver Public Library’s (VPL) Instagram, Twitter, and YouTube feeds throughout the first wave of the COVID-19 pandemic (February 1st to June 30th, 2020) to better understand what types of crisis-related services and information they are providing to the public. This data will also be compared to Instagram, Twitter, and YouTube content from the same time period in 2019 to investigate whether the pandemic has changed VPL’s social media presence in any significant way.
Information Literacy in Nova Scotia: Systematic Mapping of High School Learning Outcomes
Authors: Munroe-Lynds Cora-Lynn
Published: May 2021

Information literacy has never been more important for the functioning of the democratic process, and for autonomy over one’s decisions. The Association for College and Research Libraries (ACRL) created a framework for information literacy, which lists six threshold concepts that an information literate individual possesses. This paper seeks to identify information literacy embedded in the Nova Scotia high school curriculum learning outcomes. Information literacy threshold concepts were mapped in the learning outcomes using qualitative coding. Findings from this study will reveal strengths and weaknesses in IL competencies in the Nova Scotia high school courses. This study also provides recommendation for future research.
The established archives: a bibliometric overview of archival research
Authors: Fitzgerald Kendell , Bourret Grace , Audas Jordan , Olson Lisa , Roeschley Ana , Mongeon Philippe
Published: May 2021

TBD
Mapping the Canadian library and information science research landscape
Authors: Munroe-Lynds Cora-Lynn , Simard Marc-André , Li Vinson , McClean Emily , Mongeon Philippe
Published: May 2021

This work-in-progress paper aims to map the scholarship produced by the eight Canadian Library and Information Science (LIS) schools. After using the citation network to divide publications into several research areas, we analyze how the research output of different LIS schools is distributed across these areas, in an attempt to shed light on the schools’ specificities and commonalities and how each school contributes to the global picture of Canadian LIS research.
“I’ll just make sure we’re all on the same page”: Talking fictional worlds into being
Authors: Stobbs Robyn E , Oak Arlene
Published: May 2021

This poster will present emerging results from a study of material and discursive information practices in tabletop roleplaying games. The focus will be on the ways in which players collaboratively construct and interact with the fictional worlds of play. A “big and small story” approach, influenced by the ethnomethodological methods of conversation analysis and membership categorization analysis, will be used to analyze the players’ talk as they intersubjectively create and sustain a fictional space of play.
Tecnologias sociais de acesso à água enquanto estratégias de convivência com o semiárido: experiências e protagonismo da comunidade do Sítio Carcaré, São José da Lagoa Tapada-PB
Authors: Tomaz Benedita Martins , Florentino Hugo da Silva
Published: May 2021

Esta pesquisa objetivou refletir os avanços, dificuldades e desafios em uma comunidade rural no Sertão paraibano após a implantação de tecnologias sociais de acesso à água desenvolvidas e aplicadas pela Articulação do Semiárido. O trabalho apoiou-se na abordagem qualitativa, do tipo estudo de caso, cuja análise das experiências e dos resultados ocorreu por meio de entrevistas. Os resultados expõem que as cisternas de placas e de calçadão são tecnologias sociais de acesso à água que garantem as condições mínimas de água, promovendo inclusão e protagonismo das famílias, mas que ainda existem desafios de natureza política (quantidade de água e usos múltiplos, uso de carro-pipa em situações emergenciais e acesso à terra), estrutural (rachaduras e vazamentos por falta de manutenção), e de conhecimento para consolidação do paradigma da sustentabilidade e da convivência com o semiárido na área pesquisada.

Palavras chave: Políticas públicas, autonomia, ASA, cisternas.
An Introduction of New Simulation and Optimization Software Application for Long-Term Limestone Quarry Production Planning
Authors: VU Trong , HOANG HUNG Thang , DINH Bao Tran
Published: May 2021

Long-term limestone quarry production planning is essential to maintain the supply to the cement plant. In which, quarry planners usually attempt to fulfil the complicated calculations, which ensure a consistent supply of raw materials to the cement plant while guaranteeing technical and operational parameters in mining. Traditionally, the calculations are done on a spreadsheet or by trial and error procedure resulting in high additive cost and an increase in product variability. Modern quarry management relies on block models and mathematical algorithms integrated into the software to optimize the long-term limestone quarry production planning. However, this method is potentially sensitive to geological uncertainty in block modelling, resulting in the deviation of the supply production of raw materials. The need for mining intelligently raw material is, therefore, crucial and an increasing issue in the cement industry. In this research, a new simulation and optimization software application called Quarrier is introduced, allowing quarry planners to address the conflicting requirements of long-term limestone quarry production planning while forecasting and mitigating the effects of geological uncertainty on the supply of raw materials for the cement plant. The benefits of this software are demonstrated through a limestone quarry in Vietnam.
Safe Exploitation Solution and Reduction of Resources Loss for the L7 Seam at the West Wing Area of the 790 Open Pit Site of the Mong Duong Coal Mine
Authors: Hung Pham Duc , TIEN DUNG Le , VAN QUANG Nguyen
Published: May 2021

In the next time, deepening exploitation and increasing capacity in underground mines are extremely necessary to meet the demand of using coal for developing economies. This problem is not only done in underground mines but also in areas that cannot be exploited by open-pit methods such as the open-pit edge. When exploiting deep underground mines, there are many difficulties for tasks such as: controlling ground pressure; ventilation; drainage, transportation etc. When cutting coal in longwall, it will create a goaf, causing a natural imbalance of stress in the ground, leading to the phenomenon of displacement of rock deformation and destruction of roadways, which creates a risk of unsafety labour. The L7 seam at the west wing area of the Mong Duong coal mine has an average thickness of 7m, an average slope angle of 15o, located near the edge of the 790 open pit site. According to the production plan, this mine will exploit this reservoir with blasting-drilling technology, longwall support by the semi-mechanized shield (self-moving hydraulic frame GK/1600/16/24/HTD). The preliminary assessment of hydrogeological conditions of the mine shows that this is a potential area with a high risk of water burst into the longwall. Until nowthis mine has not yet given a specific solution to this problem. Finding a reasonable mining solution to ensure production safety and reduce resources loss is extremely important problem not only for the Mong Duong coal mine but also for mines that have similar mining conditions of Vietnam National Coal – Mineral Industries Holding Limited (Vinacomin), Vietnam.
Study of Suitable Washing Flowsheets For High Ash Coals of Nui Hong Coal Mine
Authors: Van Pham Luan , NGUYEN Ngoc Phu , LE Viet Ha
Published: May 2021

Current high ash coal stockpile of Nui Hong Coal Mine is estimated at about 1 million tonnes. This increasingly stockpiled coal is not sellable and disposable due to the government regulations so that a problem related to space and environment limitations becomes more serious. This report presents the results of the study on washability of Nui Hong high ash coals and proposed suitable flowsheets for washing this type of coals. Basic characteristics of the coals include High ash content of over 55%; High moisture of above 20%, high rate of disintegration into finer particles in water, the high proportion of fine coals of the size fraction 0–6 mm; 30% or more of high ash superfine fraction -0.045 mm that contained mainly slime, clay and fine non-coal organic impurities. The results of particle size analysis and sink-and-float analysis of +1 mm coal sizes indicated that a 1–6 mm clean coal with ash content of less than 45% could be produced by a combination of coal feed crushing, washing and removal of 0–0.1 mm superfine particles.  Flotation of the size fraction - 0.1 mm could produce a clean coal float with the ash less than 40%, provided that slimes should be removed before flotation. From results of the study, it was found that the most suitable flowsheet for washing of Nui Hong high ash coals should include crushing of the feed down to -6 (8) mm, washing by rotary scrubber screens to separate clean coal of 0.1–6 (8) mm, desliming of -0.1 mm fraction by spiral classifier before flotation. From the study samples with the average initial ash content of 55%, a common clean coal product with ash content of about 40–45% and with a yield of over 60% were obtained according to the proposed flowsheet. The quality of the clean coal matched with Vietnam coal quality standard as 6B grade fine coal (TCVN) so that it could be supplied to the local thermal power plants.
Developing a Set of Criteria for Prioritising GHG Emission Reduction Measures in Metallurgical Sector
Authors: Truong Tran Xuan , THANH HA Tran , THANH NGHI Le , NHU HUNG Nguyen , THI THANH NGA Do , XUAN HOA Vuong
Published: May 2021

Prioritizing climate change mitigation measures could help to identify most feasible or most nationally appropriated mitigation actions. This process can also provide important inputs for the development of national climate change strategies or policies. The paper applies Delphi method to prioritize criteria for potential climate change mitigation technology in the metallurgical sector in Vietnam. The consultation process has been done with ten experts in only two cycle to reach Kendall (W) value over 0.5. Then, 11 out of 21 criteria have been selected for Multi-Criteria Decision Analysis (MCDA) in prioritizing mitigation options in iron and steel, lead, zinc, tin and aluminium productions. Mitigation options with highest scores will be proposed for mitigation target of the metallurgical sector which could be inputs for NDC of industrial sector. The selected criteria include 01 indicator in emission reduction (GPT1), 01 indicator in environmental impacts (MT1), 01 indicators in social impacts (XH3), 02 indicators in economic impacts (KT1, KT2), 02 indicators in sustainable development impacts (PTBV1, PTBV2) and 04 indicators in MRV (MRV1, MRV2, MRV3, MRV4).
Research Areas in Post-Mining – Experiences from German Hard Coal Mining
Authors: Kretschmann Jürgen , NGUYEN Nga
Published: May 2021

The German hard coal mining industry closed its last active mine at the end of the year 2018. The Research Institute for Post-Mining (FZN) at TH Georg Agricola University (THGA) in Bochum/Germany, has developed an integrated approach to meet the challenges of the post-mining era. Therefore, post-mining covers four research areas: Perpetual tasks and mine water management; Geomonitoring in post-mining; Material science for the preservation of industrial heritage; Reactivation and transition.

The institute is trying to fulfill central requirements of the UN to deal responsibly and sustainably with the resources of our planet. It plans to be a part of a national and international network in the interest of all social groups and the environment.
3D Spatial Interpolation Methods for Open-Pit Mining Air Quality with Data Acquired by Small UAV Based Monitoring System
Authors: Long Nguyen Quoc , XUAN CUONG Cao , VAN CANH Le , NGOC BICH Nguyen , AN TRAN Dang , BUI Xuan-Nam
Published: May 2021

Open-pit mining activities, including blasting, drilling, loading, and transport, often result in the direct emission of particulates and gases into the atmosphere. Occupational exposure to these pollutants is considered as the risk for health, especially the risk of developing respiratory diseases. An air quality monitoring system and spatial analysis are necessary to identify these potential hazards. In this study, we propose an air quality monitoring system that integrates gas and dust sensors into a small multi-rotor copter or unmanned aerial vehicle (UAV). Different spatial interpolation methods including trilinear interpolation, nearest neighbour, and natural neighbour applied to the monitoring data (CO, SO2, PM2.5, CO2) from our system to derive air concentration levels in the atmosphere of open-pit coal mines were also examined. The results show that the UAV based air quality monitoring system performed efficiently and safely in conditions of deep open-pit coal mines. In addition, for the estimation of the concentration level of gases and dust in unsampled points, trilinear interpolation performed with the most accurate result, followed by natural neighbor and nearest neighbor.
Simulation of FLY-ROCK DISTANCe as a Function of Blast Conditions: a Case Study in Vietnam
Authors: Tuan Nguyen Anh , VAN HOA Pham , VAN VIET Pham , DINH BAO Tran , THI HAI Le
Published: May 2021

The prediction of fly-rock distances is a big problem in the blasting areas of open-pit mines. The fly-rock distance plays a crucial role in the reduction and control of blasting accidents in quarries. This paper proposes the modelling of the contact dynamics as a non-smooth discrete element method (NSCD). Then, the fly-rock phenomenon is simulated using this NSCD method. This approach was to develop a model that correlates to blast conditions, initial fly-rock/rock-fall velocities and permits the computation of fly-rock range from randomization orbits. The results showed that the NSCD method is a good means for the simulation with the variability of blasting parameters. This method is to relate the initial fly-rock velocity to blast conditions and then uses ballistic trajectories to compute the maximum fly-rock distance. Finally, it should be noted that the proposed simulation of fly-rock trajectories which shows the distribution of fly-rock bounce heights above the ground level with the different coefficient of restitution range as a function of blast conditions. It should be used in the Ninh Dan limestone quarry belonging to the Song Thao Cement, Phu Tho province (Vietnam), and it should be directly used in the same other quarries.
Exposure to Noise Induced at Work and Prevention Practice Among Workers of Stone Mining Company, An Giang, 2018
Authors: Ngoc Bich Nguyen , HONG GIANG Huynh Thi , TAN KHOA Vo , ANH TUAN Nguyen
Published: May 2021

Noise is one of the most common occupational hazards in Vietnam, causing occupational hearing impairement. Stone mining is among the high-risk working environment. This study aims to describe noise exposure and prevention practice among workers of stone mining in An Giang province. A cross-sectional study using a quantitative method was conducted in 2018. 176 noise samples were collected, and 215 workers were interviewed using a structured questionnaire. Results show that workers at grinding section exposed with the high level of noise (compared to national standards) and they did not practice adequately to protect themselves from the hazard. Workers aged above 39 years old and had more than 10-year working experience had better prevention practice than the other groups. The differences were statistically significant. It is concluded that workers were exposed to the high level of noise at work, their practice regarding hearing impairement prevention was not adequate, and age, years of working were associated factors with prevention practice among workers.
Coupling Satellite Images and Unmanned Aerial Vehicle Data to Monitor the Exploitation of Open-Pit Mine
Authors: Si Son Tong , LE Quang Toan , TONG Thi-Huyen-Ai , NGUYEN Vu Giang , VU Phan Long , HA Le Thi Thu
Published: May 2021

Discovering the variation of an open-pit mine in vertical, horizontal, and temporal dimensions as well to characterize the stages and the trends of the exploitation are indispensable tasks which provide information supporting decision making and planning for sustainable development of the mining industry. Remote sensing technique with the advantages of multi-spatial, multi-spectral, multi-temporal resolution is a promising solution to meet the  information requirement. This study proposes an approach of coupling the high-resolution satellite images and Unmanned Aerial Vehicle (UAV) data to observe the variation of Tan An open rocky mine during its lifetime. Five satellite images with the resolution of 0.5 m acquired in 2006, 2012, 2014, 2016, 2018, and two ortho-images with 0.034 m resolution constructed from UAV photos captured in 2019, 2020 are used to make land cover maps. The analysis of land cover changes discovers 3 stages of open-pit mine exploitation consisting of unprompted exploitation, exploiting outbreak and stable exploitation corresponding to the changes in the mine. Besides, two Digital Surface Models (DSM) constructed by UAV photos are compared to calculate the elevation and volume changes. The assessment of the correlation between elevation change and land cover change indicates that the mineral exploitation is in the vertical range from 645 m to 660 m, and the exploitation trend is following the horizontal expansion rather than the deep excavation. Additionally, this experiment results in 79,422 m3 of mineral taken from the mine, and 34,022 m3 of soil used for the restoration within a year from June 2019 to June 2020.
The Development of Terrestrial Laser Scanning Technology And Its Applications in Mine Shafts in Poland
Authors: Lipecki TOMASZ , THI THU HUONG Kim
Published: May 2021

Laser scanners are used more and more as surveying instruments for various applications. With the advance of high precisions systems, laser scanner devices can work in most real-world environments under many different conditions. In the field of mining surveying open up a new method with data capturing. Mining industry requires precise data in order to be able to have a as-built documentation of the facility. Nowadays, the mines are increasingly deepened. For the safe operation of the underground mine, special attention is paid to vertical transport and a set of devices supporting it, mounted in mining shafts. All components must meet stringent criteria for proper operation. The classic geodetic measurements and mechanical tests are long-lasting and do not always provide the full range of information needed about the condition of the object. This paper reports about terrestrial laser scanning method and system mobile terrestrial laser scanning, which has been applied at many vertical shafts in mines of Poland for determining geometric deformation of vertical shaft elements. This system gives high precision 1-3 mm in every horizontal cross – section. Processing time is very quickly and need only few staff to implement all system.
Building International Capacity in Mining Engineering: The NUST-WITS Mining Educational Collaboration
Authors: Cawood Frederick T. , ALI Sarfraz , ASHRAF Hamid , FEROZE Tariq
Published: May 2021

Pakistan has not developed its mining sector to its full potential. This is despite its quality mineral resources. Mining in Pakistan is mostly ‘artisanal’ and ‘small-scale’, and for this to change, the country must develop the skills to support a flourishing formal sector of significance in the twenty-first century.

Pakistan has good quality universities with some of them already providing courses in mining. Building on this platform, NUST University approached the School of Mining Engineering at the University of the Witwatersrand (Wits Mining) in 2011 to start a collaboration that will result in greater sector benefit for Pakistan. The outcome of the discussions was to do capacity building for mining professionals in Pakistan at postgraduate and post-doctorate levels. The approach used was to identify university staff requirements to support a teaching, learning and research programme for a 21st century mining sector and then to match these with the qualifications of the lecturers who were identified to deliver the programme at NUST. The collaboration has proved to be successful because of leadership, energy and carefully selected ‘champions’ on both sides. One of the many highlights of the collaboration was the establishment of an excellent laboratory doing research on how the fourth industrial revolution is affecting the mining sector. The Digital Mining Project formed the core of the research, and it still allows for regular exchanges of students, staff and post-doctorates on a consistent research theme.
Polidiskte Tek Bir Eleman Tarafından Üretilen Değişmez Alt Uzaylar için Operatör Teorik Bir Kuruluş
Authors: ESKİŞEHİRLİ Beyaz Başak
Published: May 2021

Birim disk D üzerindeki H2(D) Hardy uzayının değişmez alt uzaylarının tek bir fonksiyon tarafından üretilen alt uzaylar olduğu ve bu fonksiyonların bir iç fonksiyon olduğu A. Beurling’in [2] çalışmasından bilinmektedir. Birim diskteki bu durumun aksine, polidisk durumunda değişmez alt uzayların yapısı daha karmaşıktır. Öyle ki W. Rudin’in “Function Theory in Polydiscs” kitabında verdiği “Polidisk üzerindeki değişmez alt uzayların sınıflandırılması ya da kesin bir tanımının verilmesi” problemi yoğun bir şekilde çalışılmasına rağmen bugün hala operatör teori ve kompleks değişkenli fonksiyonlar teorisinin en önemli açık problemlerindendir. Bu çalışmada, Beurling-Lax-Halmos Teoremi kullanılarak, polidisk Dn üzerindeki H2(D)(Dn) Hardy uzayının tek bir eleman tarafından üretilen değişmez alt uzayları için bir karakterizasyon verilecektir. Ek olarak, Beurling-tipli değişmez alt uzaylar için [12]’de verilen bir karakterizasyon da elde edilecektir.
Quantitative Analysis for RBS and PIXE Spectrums of Thin Cu2ZnSnS4 (CZTS) Films
Authors: USTA Metin
Published: May 2021

The objective of this work is to introduce a different technique to existing studies that determine the stoichiometric ratios of thin CZTS structures. To this end, the CZTS targets were propagated by sol-gel process and later RBS and PIXE spectra were achieved by irradiating these samples with protons of 3.034 MeV energy into microbeam chamber. RBS spectrum was taken with RBS detector and PIXE spectra were collected with IGe and SDD detectors. As energy calibration was performed to these spectra and the RBS spectrum was fixed with the SIMNRA simulation program and the PIXE spectra adjusted with the Gaussian function. In the RBS spectrum, quantitative analysis measurements could not be performed due to the presence of Mo peak, which supplies electrical conductivity, while PIXE spectra results close to expected values. For this, least squares regression method were carried out PIXE spectra for the reference material, and the analytical elemental amount ratios for CZTS were specified with the calibration coefficients found. It was observed that the results acquired with the SDD detector were convenient with the required values, except sulfur content. This technique is a fast and simple method that can be employed analytically to help improve the accuracy of the existing methods in the literature that used to determine the constituent quantities and the depth analysis of thin films. However, this method should be compared with inverse least squares model or eigenvector quantitative analysis methods.
q−Mittag-Leffler Fonksiyonu ile Tanımlı Analitik Fonksiyonlar için Konvolüsyon Özellikleri
Authors: ÇETİNKAYA Asena , MERT Oya
Published: May 2021

Son zamanlarda, Mittag-Leffler fonksiyonu yalınkat fonksiyonlar ile ilgili çalışmalarda önemli rol oynamaktadır. Bu makalede, yapılan son çalışmaların ışığında q−Mittag-Leffler fonksiyonu ile tanımlı yalınkat fonksiyonların iki yeni alt sınıfı tanımlanmıştır. Bu sınıflar için konvolüsyon koşulları ve katsayı tahminleri araştırılmıştır. Elde edilen bulgular literatürde olan bulgularla karşılaştırılarak sunulmuştur.
Nucleon Densities of Copper Isotopes Calculated by Skyrme and Gogny Models
Authors: SARPÜN İsmail Hakkı , AKDENİZ Ferhan , TEL Eyyup , AYDIN Abdullah
Published: May 2021

The ground state properties of the nuclei are generally calculated using two different methods, namely Skyrme and Gogny force methods. We have calculated nucleon densities of Copper isotopes by using Hartree-Fock-Skyrme (using Woods-Saxon Potential) (SHF-WS), Hartree-Fock-Skyrme (using Harmonic Oscillator Potential) (SHF-HO), Hartree-Fock-Bogolyubov-Skyrme (HFB-S) and the Hartree-Fock-Bogolyubov-Gogny (HFB-G) methods. In the first two methods, the densities and rms (root mean square) radii for both proton and neutron of copper isotopes were calculated by different Skyrme parameters set. Theoretical calculated charge density was compared with experimental data of Angeli and Marinova to determine the best parameter set for each copper isotope. Then all evaluated nucleon densities via four different methods were compared each other. All methods gave similar results for all copper isotopes.
Prediction of Excess Molar Volumes for Quaternary Liquid Mixtures at 298.15 K
Authors: ARSLAN Hüseyin
Published: May 2021

The excess molar volumes for the ternary n-hexanol + ethanenitrile + dichloromethane and quaternary system n-hexanol + ethanenitrile + dichloromethane + tetrahydrofuran at 298.15K has been calculated by using symmetric and asymmetric models. Chou’s General solution model has been employed to evaluate the excess molar volume of the ternary n-hexanol + ethanenitrile + dichloromethane and quaternary systems in the n-hexanol + ethanenitrile + dichloromethane + tetrahydrofuran. The good agreement between experimental data and calculated results of excess molar volumes for both mixture systems indicates that this approach can be successfully used to predict the excess molar volumes of multicomponent systems.
Analysis of Relationship Between Some Disazo Dyes Derived from 2,4-Dihydroxyquinoline and Its Anticancer and DNA Binding Properties by Density Functional Theory
Authors: ÇAVUŞ Muhammet , ŞENER Nesrin
Published: May 2021

It was studied some physical and chemical properties of 2,4-dihydroxy quinoline derivative diazo dyes by theoretical methods. Six different solvents were used to determine the solvatochromic behavior and absorption of the compounds, and the experimental results were compared with the theoretical data obtained from quantum chemical calculations. DFT calculations were carried out to obtain the geometric, electronic and some chemical reactivity parameters of the compounds. The atom in molecule, natural bond orbital, density of state, non-covalent interaction, Fukui function, electron localization function, and electron delocalization range analyzes of the compounds were performed to determine the relationship between the electronic properties and the DNA binding capacity and the cytotoxicity against HeLa and PC3 cancer cell lines. It was observed that the compounds substituted with –Cl and –NO2 had higher DNA binding and higher anticancer effect. Besides the positions of the substituents, the electron density in the bonds, the delocalization index values and the distribution of the nucleophilic and electrophilic attack sites are among the important factors determining the reactivity of the compounds. In addition, the HOMO energies of the compounds with better DNA binding properties were calculated higher than the other compounds.
206,207Pb(p,xn) Reaksiyonu Tesir Kesiti Hesaplamalarına Seviye Yoğunluğu Modellerinin Etkilerinin İncelenmesi
Authors: ÖZDOĞAN Hasan
Published: May 2021

Bu çalışmada 206Pb(p,2n)205Bi, 206Pb(p,3n)204Bi, 206Pb(p,5n)202Bi, 207Pb(p,2n)206Bi ve 207Pb(p,3n)205Bi reaksiyon tesir kesitleri TALYS 1.95 kodu ile hesaplanmıştır. Hesaplamalar için Geometri Bağımlı Hibrit Model TALYS 1.95 içerisine gömülmüş ve denge-öncesi model olarak kullanılmıştır. Sabit Sıcaklık Fermi Gaz Model (Constant Temperature Fermi Gas Model-CTFGM), Geri Kaydırmalı Fermi Gaz Model (Back Shifted Fermi Gas Model-BSFGM) ve Genelleştirilmiş Süper Akışkan Modelleri (Generalised Super Fluid Model-GSM) seviye yoğunluğu modelleri olarak seçilmiştir. Hesaplanan tesir kesitleri literatürden alınan deneysel verilerle karşılaştırılmıştır. Seviye yoğunluğu modellerinin reaksiyon tesir kesiti hesaplamaları üzerine etkisini araştırmak için, BSFGM ve GSM tesir kesiti hesaplamaları, CTFGM hesaplamalarına normalize edilmiştir. Sonuç olarak; seviye yoğunluğu modellerinin bu çalışmada incelenen tesir kesiti hesaplamaları üzerinde %40 oranında etkili olduğu bulunmuştur.
Ultrasonik Sprey Piroliz ile Üretilen ZnO İnce Filmlerin Alttaş Sıcaklıklarının Yapısal ve Optik Özelliklerine Etkisi
Authors: KOÇ Murat
Published: May 2021

Bu çalışmada, ZnO ince filmler; 350, 400 ve 450 °C üç farklı sıcaklıktaki alttaşa ultrasonik sprey piroliz yöntemi ile biriktirilmiştir. ZnO ince film üretiminde çinko kaynağı olarak çinko asetat dihidrat (Zn(CH3COO)2.2H2O) kullanılmıştır. Yapılan XRD analizleri, ZnO ince filmlerin, nano boyutta hekzagonal yapıda ve baskın pik pozisyonunun (100) düzleminde olduğunu doğrulamıştır. Kristal tane boyutu Debye-Scherrer formülü kullanılarak hesaplanmış ve 324.7-442.3 Å aralığında bulunmuştur. SEM yüzey görüntüleri incelendiğinde ZnO ince filmlerin homojen bir şekilde kaplandığı ve SEM kesit görüntülerinden kalınlıkların ~251-286 nm aralığında değiştiği görülmektedir. Filmlerin yüzey pürüzlülüğü AFM ile incelenmiş ve yüzey pürüzlülük değerleri 23.00-43.44 nm aralığında elde edilmiştir. ZnO ince filmlerin UV spektrumlarından, optik geçirgenlikleri %80' in üzerinde bulunurken, yasak enerji aralıkları 3.13-3.26 eV olarak bulunmuştur.
Non-communicable disease risk factors and prevalence within Thaha, Makwanpur, Nepal: a cross-sectional study
Authors: Schlabach Andrew , Guragain Bimsagar , Marx Ben , Espesete Deb , Shirilla Beth , Warbrick Jessica , Lim Tameka
Published: May 2021

Background

Nepal is currently in a transition from infectious diseases to non-communicable diseases (NCDs) as the major public health concern. However, many areas of the country are still lacking baseline information on the prevalence of NCDs and the underlying risk factors.

Methods

Inhabitants of five wards in Thaha Municipality, Nepal, participated in a door-to-door survey. The surveying took place between November and December 2018 and included 1,346 households (83% of registered households in this area), with 2,903 individual responses. Alongside the survey, we also performed a number of clinically relevant measurements, including blood pressure, heart rate, waist-to-hip ratio, oxygen saturation levels (SpO2), respiration rate, and blood glucose. The study was aligned with the WHO STEPs surveillance protocol.

Results

Respiratory disease prevalence in Thaha was 4.3% overall (men, 5.3%; women, 3.6%) with an at-risk prevalence of 26%. High rates of respiratory disease may be related to a majority (56%) of surveyed households cooking with firewood, and 29.7% of households lacking any ventilation for smoke when cooking. Overall prevalence of Stage 2 Hypertension was 26.3%, with a 33% prevalence found among Thaha men aged 18 to 45. Obesity prevalence among young women was notable, with 25.2% of women aged 18 to 30 in an at-risk category and an additional 34.8% in a high risk category. A majority of households (57%) reported at least one family member suffering from joint pain that interfered with work.

Conclusions

This study demonstrates the feasibility of a cost-efficient population survey establishing NCD baseline prevalence in the Makwanpur District of Nepal. The methodology is applicable to governmental and non-governmental agencies assessing populations in rural areas within middle and low income countries and can be executed in a relatively large geographic area. The data collected reveals many previously undetected NCD health concerns in the Makwanpur District of Nepal and can serve as an important tool for the allocation of health resources serving this district in the future.
Actitud emprendedora en Instituciones de Educación Superior de Guanajuato
Authors: Fragoso Mora Adriana , Sánchez Beltrán Ma. Eugenia , Oliva Ramos Juan Tomás , Zárate Negrete Laura Elena , Pérez Márquez Rosalba , Elías Chávez Alba Edith
Published: May 2021

El emprendimiento es necesario para el crecimiento económico y, por lo tanto, representa un pilar que requiere impulso y fortalecimiento de competencias tanto en la educación como en las organizaciones. Esta publicación expone experiencias en la industria y en instituciones educativas, las cuales se orientan a compartir estrategias para el desarrollo del perfil emprendedor en diversos sectores sociales; por otro lado, con base en los resultados obtenidos de las investigaciones establece la relación e importancia del apoyo gubernamental y las instancias privadas, así como de la cooperación social en la proliferación y permanencia de las empresas.
The Role of Oily and Methanolic Extracts of Phoenix Dactylifera Leaves in Ameliorating CCl4 Cytotoxicity in Male Rats
Authors: Al-Zeiny Saadia S.M. , AL-Rekabi Falah M.K. , Al-rekabie Ahmed sh. j. , Abbas Duraid A.
Published: May 2021

The study was performed to investigate the protective effect of different methanolic and oily extracts of leave and dry date of Phoenix dactylifera against oxidative stress induced by CCl4 on 49 Sprague-Dawley male rats weighed 175-200 g and aged 6-8 months. The animals were equally divided into 7 groups and assigned as follows: G1, administered 0.1 mL distilled water orally and considered control negative group (C-ve); G2, administered 0.1 mL/100 g BW corn oil (CrO); and G3 administered 100 mg/kg BW CCl4 orally for induction oxidative stress and considered control positive group (C+ve). The other four groups were initially administered 100 mg/kg BW CCl4 for oxidative stress induction and treated for two months as follows: G4, treated orally by 100 mg/kg BW of date methanolic extract (DME); G5, treated orally by 150 mg/kg BW of leaves methanolic extract (LME); G6, treated by 250 mg/kg BW date oily extract (DOE); while G7, treated by 250 mg/kg BW leaves oily extract (LOE). At the end of two months experiment, the animals were scarified, and their femurs removed for cytogenetic examination. results showed that only CCl4 group had significant increase (P< 0.05) in mitotic index compared to negative control and all treated groups. CCl4 group also recorded clear increasing in percentage of chromosome aberrations including diverse types in bone marrow cell compared to rat groups treated by date and leaves methanolic and oily extracts and negative control groups. It could be concluded that the treatment with different palm date and leaves extracts failed to overcome the genotoxic effect of CCl4 completely. Possibly, because CCl4 dosed for extended period (2 months) might cause extensive cell and genetic damages could be opposed antioxidants presented in the different palm extracts recording some but lesser chromosomal aberration compared to that CCl4 treated group.
Transport and Deposition of Saharan Dust Observed from Satellite Images and Ground Measurements
Authors: Senghor Habib , Roberts Alex J. , Dieng Abdou L. , Wane Dahirou , Dione Cheikh , Fall Mouhamed , Diop Abdoulahat , Gaye Amadou T. , Marsham John
Published: May 2021

Haboob occurrence strongly impacts the annual variability of airborne desert dust in North Africa. In fact, more dust is raised from erodible surfaces in the early summer (monsoon) season when deep convective storms are common but soil moisture and vegetation cover are low. On 27 June 2018, a large dust storm is initiated over North Africa associated with an intensive westward dust transport. Far away from emission sources, dust is transported over the Atlantic for the long distance. Dust plume is emitted by a strong surface wind and further becomes a type of haboob when it merges with the southwestward deep convective system in central Mali at 0200 UTC (27 June). We use satellite observations to describe and estimate the dust mass concentration during the event. Approximately 93% of emitted dust is removed the dry deposition from the atmosphere between sources (10°N–25°N; 1°W–8°E) and the African coast (6°N–21°N; 16°W–10°W). The convective cold pool has induced large economic and healthy damages, and death of animals in the northeastern side of Senegal. ERA5 reanalysis has shown that the convective mesoscale impacts strongly the climatological location of the Saharan heat low (SHL).
Quantum Biophysics of the Atmosphere: Factor Analysis of the Annual Dynamics of Maximum, Minimum and Average Temperatures from 1879 to 2017 to Hadley English Temperature Center (Hadcet)
Authors: Matveevich Mazurkin Peter
Published: May 2021

Factor analysis of annual dynamics from 1879 to 2017 was carried out by the method of identification of stable regularities: maximum, minimum and average air temperature of Central England according to HadCET. The sample capacity was 139 rows. In factor analysis, time is excluded, and it acts only as a system-forming factor that ensures the relationship between the three parameters of climate and weather. Therefore, the adequacy of the dynamics models is taken into account in the diagonal cells of the correlation matrix. In addition to time, different lists of objects are possible in factor analysis. The coefficient of correlation variation, that is, a measure of the functional relationship between the parameters of the system (annual weather at the weather station in Central England) is 0.8230 for trends, 0.8603 taking into account the annual dynamics of the four-membered model obtained from the computational capabilities of the software environment CurveExpert-1.40, and 0.9578 for the full up to the error of measurement wavelet analysis of the dynamics of the values of three factors. In all three methods of factor analysis, the meteorological parameter «average Annual temperature» was in the first place as the influencing variable, the «Maximum temperature» was in the second place, and the «Minimum temperature» was in the third place. As the dependent measure in these areas there are three kinds of temperature. The comparison shows that among the binary relations between the three temperatures, the average temperature on the maximum air temperature in the surface layer of the atmosphere has the greatest influence on the correlation coefficient 0.9765. At the same time, all six equations refer to strong connections, so there is a high quantum certainty between the three types of temperature. But when predicting the most meaningful essence showed the maximum temperature.
VL VISIONARY LEADERSHIP IN MADRASAH'S HEAD EDUCATION QUALITY DEVELOPMENT (Study at Madrasah Ibtidaiyah Al-Abrar, Makassar City)
Authors: Mulyadi Mulyadi Mulyadi
Published: May 2021

The goals of this study are to; 1) analyze Madrasah principals' innovative leadership strategies in improving the quality of education at Madrasah Ibtidaiyah Al-Abrar Makassar City and 2) assess the efficacy of Madrasah principals' visionary leadership in developing the quality of education at Madrasah Ibtidaiyah Al-Abrar Makassar City. This type of research is descriptive qualitative research. Sources of research data are the principal, the head of the foundation and the Ibtidaiyah Al-Abrar teachers in Makassar City. Data collection techniques are carried out through observation, interviews, and documentation. The approach taken is phenomenological. The data analysis of this study used qualitative methods, with data analysis carried out by steps, data reduction, data display, and 3) data verification. The data validity test is past due to source triangulation to test the validity of data. The results showed that the visionary leadership strategy of the headmaster of madrasah in developing the quality of education of Madrasah Ibtidaiyah Al-Abrar in Makassar City, includes a) Looking to the future seen in the vision initiated, b) Able to formulate a clear vision, seen in the vision elaboration that refers to the vision madrasah, c) Able to change the vision into action, seen in the formulation of the mission and the exemplary attitude of the principal of the madrasah performance.