bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of selective serotonin receptor inhibitors on gastric histopathology in patients with depression
Authors: Akyol Taner , Muhtaroğlu Ali , Şeker Demet , Dülger Ahmet Cumhur
Published: January 2023

Objective: Antidepressant medications such as Selective Serotonin Reuptake Inhibitors (SSRI) and Serotonin and Norepinephrine Reuptake Inhibitors (SNRI) are used in the psychopharmacological treatment for various types conditions. This study aimed to investigate whether SSRIs and SNRIs could reduce gastric intestinal metaplasia.
Material Methods: A total of 212 patients who underwent upper gastrointestinal endoscopy plus biopsy in our clinic and were using selective serotonin reuptake inhibitors and other potent serotonin reuptake inhibitors were included in the study. A control group was created with a total of 230 age and gender matched patients who underwent upper gastrointestinal endoscopy plus biopsy but had no SSRI or SNRI usage. Patients’ endoscopic and pathologic findings were recorded retrospectively and compared between the groups.
Results: The patient group consisted of 180 (84.9%) male and 32 (15.1%) female patients, while the control group included 175 (76.1%) male and 55 (23.29%) female patients. There was a statistically significant difference between the groups in terms of gender (p=0.020). The rates of erythematous antral gastritis (p<0.001), peptic ulcer (p=0.019), erosive gastropathy (p=0.001) and duodenitis (p=0.002) were statistically significantly lower in the patient group compared to the control group. The rates of H.Pylori(p=0.002), intestinal metaplasia (p=0.013), neutrophil activity (acute inflammation) (p<0.001) and chronic inflammation (p<0.001) were lower in the case group compared to the control group.
Conclusion: SSRIs/SNRIs may potentially be used in treating gastrointestinal inflammation and metaplasia. However, further prospective randomised studies with larger series are needed to support our findings.
PLANOS DE TEXTO, INTERAÇÃO E SEQUÊNCIAS TEXTUAIS DIALOGAIS
Authors: MARQUESI Sueli Cristina
Published: January 2023

Este artigo visa apresentar uma reflexão sobre planos de texto de aulas teóricas remotas, com foco na sequência dialogal, cujas perguntas propiciam a tão necessária interação para o aprendizado em meios digitais. O aporte teórico que embasa a discussão é formado pelos pressupostos da Linguística Textual, em sua abordagem da Análise Textual dos Discursos (ADAM, 2011, 2019; MARQUESI, 2013, 2017, 2018, 2019). A análise de duas aulas destinadas, respectivamente, a um curso de Direito e a um curso de Letras, evidencia resultados que confirmam planos de texto conduzidos por sequências textuais dialogais, com perguntas que revelam diferentes funções, como: contextualizar, motivar, tematizar, justificar, inserir com clareza objetivos, definir, conceituar, fundamentar e promover a reflexão. As conclusões apontam para planos de texto em que o autor da aula, o professor, na busca de cumprir sua intenção comunicativa, faz combinações de perguntas que lhe permitam expandir o conteúdo da aula, trazendo vozes de outros autores, conduzidas por sua voz. Essas conclusões corroboram interfaces possíveis com as metodologias ativas (BACICH, MORAN, 2017; MARQUESI, AGUIAR, 2021; MARQUESI, SILVEIRA, 2015), cujos princípios se centram na aprendizagem interativa, autônoma e significativa.

Palavras-chave:  Plano de texto; Sequência textual dialogal; Aulas remotas.
Monopsony in Professional Labor Markets: Hospital System Concentration and Nurse Wages
Authors:   Senior economist, Center for Economic and Policy Research, Washington, DC, Allegretto Sylvia A. , Graham-Squire Dave ,   Lead statistician, University of California, San Francisco, Benioff Homelessness and Housing Initiative
Published: January 2023

Rolling waves of consolidation have significantly decreased the number of hospital systems in the U.S. potentially affecting industry quality, prices, efficiency, wages and more. This research concerns the growth in hospital system consolidation in local labor markets and its effect on registered nurse wages. We first use a nonparametric preprocessing data step via matching methods to define MSA-specific samples of workers analogous to nurses outside of the hospital sector. This step enables an accounting of heterogeneous MSA-specific baseline wage growth, and yields a standardized measure of nurse wage growth across MSAs used to set up a multi-site quasi-experiment. We then run a parsimonious linear model; market size matters, for every 0.1 increase in consolidation in smaller-MSAs, real hourly nurse wage growth decreased by $0.70 (p-value of 0.038). Though not the primary aim of this study, a secondary finding is that real hourly wages for nurses grew less than that of comparable workers by $4.08.
ECONOMIC ANALYSIS OF GRAPE PRODUCTION: A CASE STUDY OF SAVALAJ AND MANERAJURI VILLAGES OF TASGOAN BLOCK IN SANGLI DISTRICT
Authors: Digvijay R. Patil  , Amrut M. Chavan
Published: January 2023

The present paper evaluates an economic analysis of grape production in Tasgaon block of Sangli district which was carried during period 2020-2021. For the particular study two villages were selected namely Savalaj and Manerajuri based on highest area of cultivation under graphs in Tasgaon block of Sangli district. Primary data was collected from thirty grape growers through pre-tested interview schedules to estimate cost of cultivation of graphs, net and gross returns and profitability. The cost of cultivation is different with respect to region, cultivation method, establishment cost and quality of output. The attempt has been made to find out actual cost of cultivation and profitability by using average data of thirty grape growers in Savalaj and Manerajuri villages of Tasgaon block in Sangli district. The study found that the grape production basically divided into two major costs firstly, establishment cost (Fixed cost) and secondly, cost of cultivation. The establishment cost contains fifteen major operations which are mentioned in table 01 and the calculated per acre establishment cost of grape orchard was Rs 5,98,800 in which maximum expenditure was made for Mandap and Bambu support. The cost of cultivation was worked out using the standard cost concept of cost-A, cost-B and cost-C. The calculated cost of cultivation was Rs. 267669 per acre. The maximum cultivation expenditure was for plant protection (fungicide, insecticides) and labour wages. Net return from per acre grape cultivation was Rs. 212361 and output ratio was 1.81 which was more than unity shows economic profitability in grape production
Minority Views: “Liberator”, American Cinema, and the 1960s African American Film Criticism
Authors: Smoliński Sebastian
Published: January 2023

The article reconstructs the discourse of film criticism in Liberator – a radical African American magazine published between 1961 and 1971. Employing Pierre Bourdieu’s theory of the cultural field, the author situates Liberator within the context of the 1960s, civil rights movement, and Black Arts movement, and analyses the magazine’s role in film culture of the era, as well as the links between the magazine and important black filmmakers and film writers. Four aspects of Liberator’s film criticism are explored: cultural memory of past representations, criticism of genre filmmaking, the need for cinematic realism, and the possibility of creating a distinct black cinema. The case study of the critic Clayton Riley’s career presents an author who wanted to continue his radical criticism in the mainstream press (The New York Times). Liberator’s legacy is framed as essential in understanding the tradition of African American film criticism.
EVALUATION OF THE CARBON MATERIAL SURFACE BY CAPACITIVE MEASUREMENTS OF A DOUBLE-LAYER SUPERCAPACITOR
Authors:   St Petersburg State Institute of Technology, Yesarev Igor V. , Surovikin Yuri V. ,   Center of New Chemical Technologies of the Federal Research Center Boreskov Institute of Catalysis of Siberian Branch of the Russian Academy of Sciences, Agafonov Dmitry V. ,   St Petersburg State Institute of Technology
Published: January 2023

The paper considers the possibility of calculating the surface of carbon materials by measuring the capacitance of symmetric supercapacitors. It is shown that this approach allows us to obtain results that are in good agreement with the BET method. Traditional carbon materials for symmetric supercapacitors - activated carbons and carbon composites based on carbon black - are considered and compared. The capacitances of supercapacitors at different charge rates were measured in the work. When using the exponential model for almost all samples, the values of the maximum possible specific area of the sorbed ions are close to the specific surface of the materials calculated by the BET method. The exception is SX1G, for which a twofold difference between the values of specific areas is observed. This difference may be due to the non-equipotential, mostly microporous structure of the material, which is difficult for large solvated cations. Based on the experimental data obtained, it was suggested that it is possible to estimate the specific surface area of carbon materials based on the calculated capacitance. An important conclusion for practice is made - the limit of supercapacitor capacity growth is reached for materials with a specific surface area of 1500 m2/g
CRITERIA FOR THE EMERGENCE OF THREATS TO FINANCIAL AND ECONOMIC SECURITY AND THE EFFECTIVE USE OF FINANCIAL RISK MANAGEMENT TOOLS OF THE COMPANY
Authors:   Baikal State University, Irkutsk, Alkhimenko Andrey E. , Zhigas Margarita G. ,   Baikal State University, Irkutsk
Published: January 2023

The paper discusses the main criteria for the emergence of threats to financial and economic security and the effective use of financial risk management tools of the company. Competent financial planning consists in the formation of new sources that will finance the budget. The relevance of the study is due to the fact that the problem of financial and economic security and risk management is the basis of the activities of enterprises. The purpose of this article is to disclose the potential risks of implementing financial and economic policy and drawing up a risk map of the organization, as well as identifying ways to neutralize them.
DOMESTIC AND GLOBAL CHALLENGES IN ACHIEVING NATIONAL GOALS OF DEMOGRAPHIC DEVELOPMENT OF THE ARCTIC REGIONS
Authors:   Luzin Institute for Economic Studies, Kola Science Center of the Russian Academy of Sciences, Apatity, Russia, Toichkina Valentina P.
Published: January 2023

The article considers the internal challenge (the declining number of women of childbearing age 15–49 years old and the age group 20–29 years old for 2011–2020) and the global challenge (pandemic COVID-19 2020–2021) affecting the development of population reproduction processes, determining the achievement of the national goals of the demographic development of the Russian Federation and the Arctic regions. A significant impact was determined: internal call on changes in the quality level (decrease) of the stability of the birth rate in the Russian Federation and the regions of the Arctic; the global challenge (COVID-19 pandemic 2020–2021) to an increase in mortality and, as a result, a decrease in life expectancy at birth. The necessary adjustment of the processes of managing the demographic forecast at the federal level and the expected level, within the framework of the current demographic situation and the specified national goal and approximate indicators of the demographic development of the Russian Federation and the Arctic regions by 2030, is excluded.
ANALYSIS OF SOCIO-ECONOMIC AND DEMOGRAPHIC ASPECTS OF HUMAN DEVELOPMENT IN AZERBAIJAN
Authors:   Azerbaijan State University of Economics, Baku, Azerbaijan, Rustamov Rustam Ch.
Published: January 2023

The main purpose of the study is to analyze the socio-economic and demographic aspects of human potential development in Azerbaijan. The work is based on the methods of evaluation, structural-logical, historical and comparative analysis, synthesis, induction and deduction. The place and role of human potential in the system of social innovations as an important factor of innovative development of the country are revealed, characteristic features and effective mechanisms of economic management are revealed. It is stated that the human development index, calculated on the basis of indicators of education, average life expectancy and standard of living of the population, is directly related to the socio-economic and demographic development of the country. There is an urgent need to study the demographic and socio-economic aspects associated with this indicator. A deeper study of human potential development in Azerbaijan is required. The practical significance of the work lies in the possibility of using it in improving the state policy in the field of education, personnel management, improving the innovative strategy for the development of regions and the country as a whole.
SOME FEATURES OF SPECIAL FINANCIAL REGIMES AIMED AT ATTRACTING INVESTMENTS IN THE RUSSIAN ARCTIC
Authors:   Luzin Institute of Economic Problems of the Kola Scientific Center of the Russian Academy of Sciences, Murmansk, Russia, Kondratovich D. L.
Published: January 2023

The article analyzes the features of special financial regimes aimed at attracting investment in the Arctic zone of the Russian Federation (Russian Arctic). As a result of the changing geopolitical situation in the world in 2022 and the introduction of sanctions against the Russian Federation, the investment attractiveness of various projects implemented in Russia in general, and the Russian Arctic in particular, has significantly decreased. The interest of the regions in stabilizing the situation and maintaining investment attractiveness determines the need to revise the approaches used to increase financial stability, including a more detailed study of the possibilities of using special financial regimes. The purpose of this work was to study the features of the application of certain types of financial regimes in the territory of the Russian Arctic. To achieve this goal, the following tasks were identified: to systematize the main financial regimes used in the Russian Arctic, to study the features of their application in order to increase the investment attractiveness of the Arctic regions; to structure the most important aspects of the application of financial regimes in the Russian Arctic. The article concludes that the applied financial regimes make it possible to provide conditions for attracting investments to the regions of the Russian Arctic, but their application is associated with the need to adapt to the currently existing risks of sanctions from a number of countries. The use of a systematic approach in the study made it possible to clarify and systematize constructive solutions to the identified issues in order to increase the investment attractiveness of the regions of the Russian Arctic.
THE POSSIBILITIES OF REDUCING EMOTIONAL BURNOUT BY MANAGEMENT TECHNOLOGIES
Authors:   Vladimir State University named after A. G. and N. G. Stoletovs, Vladimir, Russia, Lavrova G. N. , Tumanova A. S. ,   Vladimir State University named after A. G. and N. G. Stoletovs, Vladimir, Russia
Published: January 2023

The article offers consideration of issues related to emotional burnout in people engaged in volunteer activities. The reasons for this phenomenon are named, and examples of solutions using a number of management technologies are described.
Classroom Challenges of Secondary Level English Teachers at Remote Government Schools in Nepal
Authors: Ranjit Rabu
Published: January 2023

The study was conducted to explore Secondary level English teachers’ classroom challenges in the government schools of remote Nepal. The purpose of the study was to identify classroom challenges of English teachers at the secondary level and analyze how the factors affect English Language Teaching in the classroom. Twenty English teachers responded to the questionnaire, four were selected for the interview and five agreed to participate in focus group discussion. The main findings of the study were; the teachers do not understand students’ local language, overcrowded classrooms, students’ mostly use their native language to communicate, limited lesson hours, students’ poor linguistic background and poor classroom condition. The most interesting finding is that none of the teachers was English graduates. They were from other streams like Major Nepali, Math, Commerce etc. Learning and applying various teaching methods and classroom management techniques, matching students’ linguistic level and the learning situation, making use of time, and self-reflection can help tackle English teachers’ challenges.Keywords: Challenges; English teachers; Government School; Remote; Secondary level.
Digital Mangatoon to Born Out New Peace in English Classroom
Authors: Muthmainnah Muthmainnah , J Vargheese K , Ibna Seraj Prodhan Mahbub , Darmawati Besse , Asrifan Andi
Published: January 2023

Digital comics are proven to be an effective learning tool for both teachers and students. At the university level, this study was set out to find the views of second-semester students on the use of Mangatoon digital comics in reading instruction. A quantitative study was performed, involving second-semester students at the Universitas of Al Asyariah Mandar (n=30). This study found, that on average, students find Mangatoon helpful in assisting them in reading since it has practical features preserving their motivation. Based on the student’s perception, the reading material presented in Mangatoon is easily understood, hence improvement in their reading skills can be maximised.

Keywords: Digital Comic; Reading; ELT; and Pedagogical Innovation.
Development of facies model and comparison of Darvin kupesi and Pirallahi fields
Authors:   “Oil-Gas Scientific Research Design” Institute, Azerbaijan Republic, Mustafayev Y.R.
Published: January 2023

The paper reviews two mature fields in long-term development. Both of them have a tectonically complicated structure. Although the fields have been developed since last century, they have quite large oil reserves. Due to this, the structural-lithologic framework of the fields, the lithofacies composition, the balance, and recoverable reserves, as well as the parameters of development have great significance. Our task is the specification and estimation of lithofacies properties of field data. The lithofacies of neighboring Darvin kupesi and Pirallahi fields have not been enough studied. The types of facies of sedimentary rocks of Girmaki, Lower Girmaki, and Gala suites have been researched and 3D models have been developed, the comparisons of the models have been carried out as well. As a result, the changes were observed both by the area and the depth.
ANALYSIS OF ALGORITHMS FOR RECOGNITION OF PLANT DISEASES
Authors: Андрей Владимирович Чирков, , Павел Сергеевич Комаров, , Евгений Владимирович Конюхов, , Николай Сергеевич Миронов,
Published: January 2023

Безопасность сельскохозяйственных культур представляет собой серьезную проблему в настоящее время. В большинстве случаев данную проблему можнорешить, анализируя изображения листьев на предмет наличия каких-либо отклонений. В работе предложен анализ актуальных алгоритмов, использующихся при распознавании болезней растений.

The safety of agricultural crops is a serious problem nowadays. In most cases, this problem can be solved by analyzing leaf images for any abnormalities. The paper proposes an analysis of current algorithms used in the recognition of plant diseases.
Prozessregelung beim Einlippentiefbohren/Closed loop control in single-lip deep-hole drilling
Authors: Wegert Robert , Tandler Tobias , Badie Roozbeh , Eisseler Rocco , Möhring Hans-Christian , Guski Vinzenz , Schmauder Siegfried
Published: January 2023

Das Einlippentiefbohren zeichnet sich durch hohe Oberflächengüte und Druckeigenspannungen in der Bohrungswand aus. Diese Eigenschaften hängen wesentlich von den thermomechanischen Bedingungen im Bearbeitungsprozess ab. Die geforderten Randzoneneigenschaften lassen sich durch Prozessregelung einstellen, wenn die thermomechanischen Bedingungen im optimalen Bereich gehalten werden. In diesem Beitrag wird eine Methode zur Regelung der Vorschubkraft vorgestellt. Die Vorgehensweise zur Ableitung der Übertragungsfunktion sowie die verwendete Hardware und die Schnittstellen werden beschrieben.

 

Single-lip deep-hole drilling is characterized by high surface quality and compressive residual stress in the subsurface of the drill hole. These properties depend significantly on the thermomechanical conditions in the machining process. The desired subsurface properties can be adjusted in-process via closed loop control by maintaining the thermomechanical conditions in the optimum range. This paper presents a method to control the feed force, including the procedure for deriving the transfer function and the employed hardware and interfaces.
Virtualisierung in der Steuerungstechnik/Virtualization in control technology – Virtualization and consolidation of programmable logic controllers
Authors: Susen Christoph , Storms Simon , Herfs Werner
Published: January 2023

Das in der Informationstechnik bewährte Prinzip der Virtualisierung erlaubt die parallele Nutzung mehrerer Betriebssysteme auf derselben Hardware. Zusätzliche Anforderungen in der Steuerungstechnik an Sicherheit, Verfügbarkeit und zeitliche Determiniertheit erschweren den Einsatz dieses Prinzips jedoch erheblich. Ein Konzept zur Virtualisierung und Konsolidierung industrieller Steuerungen soll die Adaption erleichtern und zur Steigerung der Wirtschaftlichkeit beitragen.

 

The principle of virtualization, which has proven itself in information technology, enables the parallel use of several operating systems on the same hardware. However, additional requirements in control technology in terms of security, availability and time determinism make the use of this principle significantly more difficult. A concept for virtualization and consolidation of industrial control systems is intended to facilitate adaptation and contribute to increasing economic efficiency.
Comparison of therapeutic effects of various stem cell types, sources, and routes of administration on chronic decompensated cirrhosis
Authors:   Henan Infectious Disease Hospital, Jin Dachuan , Cui Zhongfeng , Zhou Tao , Guo Baoqiang , Jin Shunqin , Li Guangming , Zhang Chunming
Published: January 2023

Review question / Objective: The aim of this study was to compare the therapeutic effects of various stem cell types, sources and routes of administration on chronic decompensated cirrhosis by using network meta-analysis. Condition being studied: Liver cirrhosis is an important public health problem that puzzles the world. It is divided into compensatory stage and decompensated stage. Once the patient enters decompensated stage, the treatment is very limited, and liver transplantation is currently the best and only approach to improve the survival rate of decompensated cirrhosis4. However, liver transplantation is difficult to be widely applied due to the lack of donor organs and high cost. Therefore, it is very important to study the alternative treatment of liver transplantation. Stem cell therapy as a promising frontier treatment for decompensated cirrhosis, is becoming one of the best feasible alternatives to liver transplantation in recent 20 years. It is very important and necessary to optimize the factors such as cell sources, types, and delivery route, etc. before taking stem cell therapy as a routine clinical treatment. It is believed that the network meta-analysis of the efficacy of various types of stem cells from different sources and routes of administration in the treatment of chronic decompensated cirrhosis can provide useful very clues for clinical practice.
La Cosmovisión del Pueblo Uros en sus islas flotantes en el lago navegable más alto del mundo y las necesidades para mejorar su calidad educativa.
Authors: Milla Canales Gustavo
Published: January 2023

El Objetivo del presente trabajo es dar a conocer la Cosmovisión del Pueblo flotante de los Uros en el mítico lago Titicaca y sus necesidades para mejorar la calidad educativa de sus estudiantes, para lo cual se inicia el artículo, con una descripción geográfica, seguida de antecedentes históricos, sustentadas en ­­­­publicaciones de diversos autores conocedores del pasado, el legado histórico, el contexto actual y que han realizado diversos estudios y presentado aportes tendientes al mejoramiento de su calidad educativa. Luego se dan a conocer algunas particularidades propias de sus usos y costumbres, su quehacer diario, que guardan relación con la educación de la niñez, su realidad, sus carencias y necesidades que requieren para mejorar su calidad educativa. Se concluye que teniendo este pueblo los únicos colegios flotantes en el lago navegable más alto del mundo es la  muestra de la continuidad de una cultura viva que perdura en el tiempo, y que es objeto de admiración mundial de miles de turistas que la visitan al año, lo cual requiere especial interés e intervención del Estado para establecer las políticas públicas necesarias en favor de su educación, cultura, identidad, respetando su entorno intercultural para garantizar una educación de calidad y en igualdad de oportunidades.
DEVELOPMENT OF AIR SUPPLY DEVICE FOR DRILLING WELLS WITH BACKWASHING USING AIRLIFT
Authors:   Satbayev University, BILETSKIY M.T. , RATOV B.T. ,   Satbayev University, KHOMENKO V.L. ,   NATIONAL TECHNICAL UNIVERSITY «DNIPROVSKAYA POLYTECHNIKA», 19, Dmytro Yavornitskogo avenue, Dnipro,49005, Ukraine, KOROVIAKA E.A. ,   NATIONAL TECHNICAL UNIVERSITY «DNIPROVSKAYA POLYTECHNIKA», 19, Dmytro Yavornitskogo avenue, Dnipro,49005, Ukraine, SABIROV B.F. ,   KASPIY MUNAY GROUP LLP, prom. zone 10, Zhelaevo, Uralsk, 090013, Republic of Kazakhstan, BORASH B.R. ,   YESSENOV UNIVERSITY, 32 md, Aktau, 130000, Republic of Kazakhstan
Published: January 2023

In the work, a comparative analysis of the main methods of creating backwash during well drilling was carried out: using a centrifugal pump and using an airlift. A comprehensive research method was used, including a review and synthesis of scientific and patent publications, analytical studies of methods for creating backwash during well drilling. Their advantages and disadvantages are revealed. The greatest attention is paid to drilling of large-diameter wells with backwash, which is widespread in foreign countries in the development of groundwater reserves. The presented materials showed a clear advantage of this method over others, both in terms of the quantity and quality of produced water, and in terms of well operation. It is shown that, under local conditions, the advantages of this method can have a particularly pronounced effect, and its disadvantages will manifest themselves to a minimal extent. The advantages of rotary backflushing over other drilling methods can be considered proven. It will provide a sharp increase in the utilization rate of local groundwater resources, which is the main problem of local groundwater supply. The need for widespread implementation of this method is obvious. The influence of the upward flow rate of the drilling fluid and its density on the maximum depth of drilling with backwash using an airlift has been studied. An improved device of the circulation system for drilling wells with backwash using an airlift has been developed. Thanks to its use, it becomes possible to use commercially available drill pipes with conventional connections. This allows you to increase the drilling speed by reducing the time spent on tripping operations.
MESOPOROUS ALUMINOSILICATES AS PROMISING CARRIERS OF CATALYSTS FOR PETROCHEMICAL PROCESSES
Authors:   SCIENTIFIC RESEARCH INSTITUTE FOR NEW CHEMICAL TECHNOLOGIES AND MATERIALS, 96а, Tole bi str., 050012, ABDRASSILOV A.K. ,   AL-FARABI KAZAKH NATIONAL UNIVERSITY,  Almaty, Kazakhstan, ABDILDINA K.M. ,   SCIENTIFIC RESEARCH INSTITUTE FOR NEW CHEMICAL TECHNOLOGIES AND MATERIALS, 96а, Tole bi str., 050012; Al-Farabi Kazakh National University, Almaty, Kazakhstan, VASSILINA G.K. ,   SCIENTIFIC RESEARCH INSTITUTE FOR NEW CHEMICAL TECHNOLOGIES AND MATERIALS, 96а, Tole bi str., 050012; Al-Farabi Kazakh National University, Almaty, Kazakhstan, KLASSEN I.A. ,   Al-Farabi Kazakh National University, ZABARA N.A. ,   AL-FARABI KAZAKH NATIONAL UNIVERSITY, BAIDULLA D.R. ,   AL-FARABI KAZAKH NATIONAL UNIVERSITY
Published: January 2023

Nowadays there is a number of research papers and a certain interest in some mesoporous materials and the study of their properties. Mesoporous materials have every chance to become components of industrial heterogeneous catalysts. Catalysts based on mesoporous aluminosilicates are widely used in the petrochemical industry for hydrogenation, reforming, hydroisomerization, hydrocracking, hydrodearomatization, etc. In this article mesoporous aluminosilicates (MAS) were synthesized by copolycondensation of tetraethylortosilicate and secondary aluminum butoxide. Hexadecylamine was used as a template. The physico-chemical characteristics of a synthesized structured mesoporous aluminosilicate and a bifunctional catalyst based on it were studied by nitrogen adsorption/desorption, X-ray diffraction, SEM and TPDA. It was found that the obtained samples have an ordered mesoporous structure and possess the necessary strength and concentration of acid centers for use as acid components of bifunctional catalysts of various petrochemical processes.
PHYSICO-CHEMICAL FEATURES OF AROMATIZATION OF LOWER ALKANE С3 – С4 ON HIGH SILICA ZEOLITE CATALYSTS MODIFIED WITH Zn, LA AND P ADDITIVES
Authors:   Al-Farabi Kazakh National University, TEMIROVA A.M.
Published: January 2023

The physicochemical characteristics of zeolite-containing catalysts modified by the introduction of zinc, lanthanum and phosphorus, as well as their activity in the aromatization of propane-butane fractions, have been studied. The maximum amount of aromatic hydrocarbons (43.6%) in the processing of the propane-butane fraction is formed on the Zn-La-P-ZSM-Al2 O3 catalyst at 500 °C, while the selectivity for aromatic hydrocarbons is 80.0%. When processing the propane- propylene fraction in the temperature range of 400-600°C, the yield of aromatic hydrocarbons on the Zn-La-P-ZSM-Al2O3 catalyst is significantly higher compared to other studied catalysts. The activity of catalysts in the processing of light hydrocarbons mainly depends on the structure and state of active centers and the conditions of the process. The results of the study of catalysts by electron microscopy and thermal desorption of ammonia showed that acid sites coexist with metal sites on the surface of the developed catalysts. The composition of acid sites can include metals in various degrees of oxidation, fixed both inside the zeolite cavities and on their outer side. The most active, stable KTG-4 catalyst (Zn-La-P-ZSM-Al2 O3 ) is recommended for pilot testing at gas and oil refineries when processing propane-butane fraction and gases released during catalytic cracking into aromatic hydrocarbons.
Strategies for Mitigating MBR Membrane Biofouling
Authors:   Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan S4S 0A2, Canada, Wang S. Y. , Young S. ,   Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan S4S 0A2, Canada
Published: January 2023

Membrane biofouling is a roadblock to the application of membrane bioreactors (MBR) for wastewater treatment and reuse. Strategies for the mitigation of membrane biofouling have been extensively reviewed in this paper. The review was focused on feedwater pretreatment, modified membranes, suppression of the secretion and discharge of extracellular polymeric substances (EPSs) and soluble microbial products (SMPs), and novel MRB systems. The three identified novel strategies for mitigating membrane biofouling in an MBR for wastewater reclamation are lower EPS concentration by adding D-amino acids (D-AAs) and a cationic polymer flucculant; introducing a modified membrane in an MBR; and applying a novel algae-bacteria system. Experimental results have shown that membrane biofouling has been mitigated to some extent via these strategies.
Geospatial Techniques for Suitable Site Determination for Municipal Solid Waste: A Case Study of Calangute/Saligao, Goa, India
Authors:   Environmental Impact and Sustainability Division, Council of Scientific and Innovative Research-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440022, India, Kadu S. B. , Dey J. ,   Council of Scientific and Innovative Research-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440022, India,   Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India, Vijay R. ,   Council of Scientific and Innovative Research-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440022, India,   Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India, Suresh-Kumar M. ,   Environmental Impact and Sustainability Division, Council of Scientific and Innovative Research-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440022, India
Published: January 2023

Solid waste management is one of the biggest concerns faced by the developing nations like India since phenomenon of urbanization has risen uncontrollably in recent years in these developing countries. This has led to develop and adopt new technologies for more constructive and efficient waste management system so as to reduce the pressure of solid waste management on the authorities as well as on environment. The initial step in the solid waste management is landfill site selection which is quite complex as it implicates many environmental factors. Suitability of the selected site is always accountable for loss or gain of the environment in the future and also it determines the economics and benefits or loss. Hence, it is always advisable that suitability should be determined considering economical and socio-environmental factors. This paper throws a light on the viability of new geospatial technologies like remote sensing and geographic information system (GIS) in the process of site selection for municipal solid waste in Calangute/Saligao, Goa, India. For the current study, Weighted Overlay Analysis is used to identify the suitability of the site. The research work identifies the arability of land for disposal of MSW in a systematic manner that ensures the environmental protection and management of waste products. This study provides the suitable dumping sites for municipal solid waste, which may be subjected to the green city management and city planning. Thus, this study provides an advance way to manage the solid waste of an urban area. This study expresses the efficiency of model-based technique that can help to deal with a burning issue like MSW across the globe. This model-based study can reduce laborious activities, minimize the cost of the project. Thus, it helps an urban planner to for better site selection for MSW management and overall city planning. This study will provide a base line for future study like leachate management, land degradation, loss of biodiversity, etc.
High-resolution Radio Study of the Dragonfly Pulsar Wind Nebula Powered by PSR J2021+3651
Authors: Jin Ruolan , Ng C.-Y. , Roberts Mallory S. E. , Li Kwan-Lok
Published: January 2023

The Dragonfly Nebula (G75.2+0.1) powered by the young pulsar J2021+3651 is a rare pulsar wind nebula (PWN) that shows double tori and polar jets enclosed by a bow-shock structure in X-rays. We present new radio observations of this source taken with the Very Large Array at 6 GHz. The radio PWN has an overall size about two times as large as the X-ray counterpart, consisting of a bright main-body region in the southwest, a narrow and fainter bridge region in the northeast, and a dark gap in between. The nebula shows a radio spectrum much softer than that of a typical PWN. This could be resulting from compression by the ram pressure as the system travels mildly supersonically in the interstellar medium. Our polarization maps reveal a highly ordered and complex B-field structure. This can be explained by a toroidal field distorted by the pulsar motion.
Application of Convolutional Neural Networks to Predict Magnetic Fields’ Directions in Turbulent Clouds
Authors: Xu Duo , Law Chi-Yan , Tan Jonathan C.
Published: January 2023

We adopt the deep learning method casi-3d (convolutional approach to structure identification-3D) to infer the orientation of magnetic fields in sub-/trans-Alfvénic turbulent clouds from molecular line emission. We carry out magnetohydrodynamic simulations with different magnetic field strengths and use these to generate synthetic observations. We apply the 3D radiation transfer code radmc-3d to model 12CO and 13CO (J = 1−0) line emission from the simulated clouds and then train a casi-3d model on these line emission data cubes to predict magnetic field morphology at the pixel level. The trained casi-3d model is able to infer magnetic field directions with a low error (≲10° for sub-Alfvénic samples and ≲30° for trans-Alfvénic samples). We further test the performance of casi-3d on a real sub-/trans- Alfvénic region in Taurus. The casi-3d prediction is consistent with the magnetic field direction inferred from Planck dust polarization measurements. We use our developed methods to produce a new magnetic field map of Taurus that has a three times higher angular resolution than the Planck map.
Magnetohydrodynamic Simulations of the Supernova Remnant G1.9+0.3
Authors: Zhang Shaobo , Tian Wenwu , Zhang Mengfei , Zhu Hui , Cui Xiaohong
Published: January 2023

The youngest Galactic supernova remnant G1.9+0.3 shows a discrete feature between its radio and X-ray morphologies. The observed radio morphology features a single maximum in the north, while the X-ray observation shows two opposite “ears” on the east and west sides. Using 3D magnetohydrodynamical simulations, we investigate the formation of the discrete feature of the remnant. We have tested different parameters for better simulation and reproduced similar discrete features under an environment with a density gradient and an environment with clump, which provides a possible explanation of the observation.
Investigation of novel turbulator with and without twisted configuration under turbulent forced convection of a CuO/water nanofluid flow inside a parabolic trough solar collector
Authors: Ouabouch Omar , Laasri Imad Ait , Kriraa Mounir , Lamsaadi Mohamed
Published: January 2023

In this study, we numerically investigated the hydrothermal performance of a parabolic trough solar collector system in which nanofluids are used to transfer thermal energy. The single-phase model has been used to evaluate the respective influences of the spherical shape of nanoparticles with a volume fraction of (φ = 3%), Reynolds number varying between 50,000 ≤ Re ≤ 250,000 and the insertion of a turbulator with and without a twisted configuration on the hydrothermal characteristics created by the turbulent forced convection of a CuO/water nanofluid. The shaped turbulator (+) inserted in the absorber tube had a length turb_L = 2.4 m, a height turb_H = 40 mm and a width turb_t = 2 mm. In the second configuration, the considered turbulator was twisted (N_twist = 5, 10 and 15 twists). The turbulator was positioned at 0.6 m from the inlet of the tube and 1 m from the outlet of the collector. The studied performances included the heat transfer characteristics, pressure drop, friction factor, thermal efficiency, temperature and velocity distribution of the outlet field. The most significant contribution of this study is the proposal of the best parameters to increase the thermal and hydraulic efficiency of parabolic troughs by adding a new turbulator with the considered twists.
Ce que disent les interventions des enseignants sur les copies des élèves de la place de la textualité et du genre dans les productions écrites
Authors: Moysan Arnaud , Vinel Élise , Delarue-Breton Catherine , Bautier Élisabeth
Published: January 2023

L’analyse comparée des traces laissées sur des copies d’élèves du primaire et du secondaire par des enseignants a permis d’illustrer plusieurs pratiques : ce qui est commun et ce qui ne l’est pas dans leurs pratiques, quels que soient les niveaux scolaires et les contextes qui révèle des profils de correcteurs, l’influence du niveau du cursus scolaire, et celle des consignes d’écriture. Elle met également au jour la faible place accordée aux dimensions du genre et de la textualité. Cette faible place permet d’interroger la fonction des situations de production écrite scolaire dans le processus d’apprentissage de l’écrit, au-delà de celui de l’apprentissage de l’orthographe.
Questionner les visées des mémoires de Masters en apprentissage à travers l’analyse de leur évaluation
Authors: Seurrat Aude
Published: January 2023

Cet article se penche sur les formes d’évaluation du mémoire de fin d’études dans les formations en apprentissage. Fondé sur une analyse de corpus et une enquête menée auprès du CFA Formasup Nord-Pas de Calais, nous questionnons la place de la recherche dans ces formations. Après avoir expliqué le fonctionnement de la plateforme MySup et analysé la mise en œuvre d’une forme d’industrialisation de la formation, nous proposons trois axes de rapprochements ou de distinctions dans les manières dont ces formations évaluent les mémoires. Alors que les aspects formels et rédactionnels sont assez convergents, l’article met en avant des distinctions fortes dans les relations entre approches méthodologiques, problématisation, et théorisation, distinctions qui permettent de questionner différentes relations entre recherche et professionnalisation et, plus largement la place de la recherche dans ces formations.
Les implications éthiques de l’accompagnement doctoral
Authors: Charmillot Maryvonne
Published: January 2023

« Etre avec et aller vers », telle est la définition minimale du verbe accompagner. Cette perspective fait de l’accompagnement une relation particulière qui repose sur la valeur symbolique du partage (Paul, 2009). Parler d’accompagnement doctoral marque donc un positionnement conceptuel fort. Quelles sont les implications éthiques d’une telle approche et comment les identifier? Cette contribution aborde cette question à partir d’une entrée épistémologique. L’hypothèse suggérée est que malgré les chartes éthiques du doctorat qui définissent les contours de l’encadrement ou plus largement de la formation doctorale et malgré la liberté académique déterminée comme principe général de la recherche universitaire, demeure un point aveugle lié aux questionnements épistémologiques. Les doctorantes et les doctorants sont confrontés à des lacunes de significations et peuvent se sentir seuls, isolés, voire en détresse. Cette contribution propose d’actualiser les implications éthiques de l’accompagnement doctoral en reconnaissant la dimension politique des savoirs, en remettant au centre la responsabilité des chercheurs et des chercheuses, en favorisant l’engagement et en valorisant la dimension biographique dans la construction des connaissances. Ces implications sont illustrées par des exemples d’actes de recherche insolents en réponse à certaines injonctions positivistes qui mettent les doctorantes et les doctorants en difficulté.
Disability-as-Possibility
Authors: Boda Phillip
Published: January 2023

This chapter presents a theory of design-based inclusive science (DISc) to help science teachers and researchers navigate how to explicitly design for all body-mind-spirits in the room. First, it outlines the background of design-based research, and then it describes the affordances and limitations among these approaches. The chapter then describes the lacking inquiries on disabled students in science education around justice and describes the importance of teachers to see themselves, and be seen, as designers.
Harnessing the Digital Science Education Revolution
Authors: Vieyra Rebecca E. , Megowan-Romanowicz Colleen , O'Brien Daniel J. , Vieyra Chrystian , Johnson-Glenberg Mina C.
Published: January 2023

Students regularly struggle with visualization and modeling of physical phenomena. Incorporating smartphones into teaching strategies has the potential to improve learning outcomes while simultaneously augmenting students' digital literacy skills in an applied context. This chapter discusses two smartphone applications developed by the authors and the accompanying research efforts in understanding how students might learn with this technology. The first app pairs augmented reality (AR) with smartphone magnetometers to visualize three-dimensional magnetic fields in space. The second uses light detection and ranging (LiDAR) technology available on modern iPhone models to plot position-time and velocity-time graphs based on users' motions. Each was developed with the support of students, teachers, software developers, and educational psychologists. In this chapter, the authors share their perspectives and other recommendations for the use and development of similar technologies to improve learning.
Roles of Technology in the Science Classroom
Authors: Schwortz Andria C. , Hickman Barbara , Burrows Borowczak Andrea C. , Dale Daniel A. , Myers Adam D.
Published: January 2023

The ability to use technology within the context of science is important for science students; however, the integration of technology within science is not implemented consistently across the curriculum, nor across grade and age levels. More insight is needed as to how science and technology are integrated in the classroom. Technology usage takes many forms in the classroom, including educational and instructional technology, programming and computational thinking, mathematics modeling, science-specific tools, and dataset usage. This chapter consists of three main sections: a meta study of forms of technology used in science education, a series of vignettes of actual use of technology in the classroom, and guidance on thoughtful adoption of technology.
Leukotrienes in Innate Immunity: Still Underappreciated after All These Years?
Authors: Serezani C Henrique , Divangahi Maziar , Peters-Golden Marc
Published: January 2023

Leukotrienes (LTs) are lipid mediators derived from the 5-lipoxygenase pathway of arachidonate metabolism. Though best known for their role in asthma, they have broad actions that touch on virtually every aspect of mammalian biology. In a Brief Review published in the journal in 2005, we presented the existing evidence supporting a role for LTs in host defense. In this updated Brief Review, we focus on selected advances since then. We detail new insights into mechanisms and regulation of LT biosynthesis; the protective roles of LTs in the host response to diverse classes of pathogens, with an emphasis on viruses, including SARS-CoV-2; the phagocyte signal transduction mechanisms by which LTs exert their antimicrobial actions; the capacity for overexuberant LT production to promote tissue damage; and roles of LTs in the noninfectious immune-relevant conditions neuroinflammation and cancer.