bluuebunny/crossref_metadata_2025 huggingface dataset:
Theoretical and experimental justification of the method for determining the parameters of the moment of gas hydrates mass crystallization
Authors: Pedchenko Larysa , Pedchenko Mykhailo , Yelchenko-Lobovska Angela
Published: March 2023

The processes of oil and gas production – extraction, preparation, storage and transportation of oil, gas and condensate – are accompanied by risks of man-made hydrate formation. Such man-made gas hydrates cause serious problems for the oil and gas production industry. Oil and gas companies bear significant material costs in connection with the prevention of these processes. For prevent or eliminate it in each specific case, it is necessary to understand the physics of processes and parameters of hydrate formation. Therefore, establishing the peculiarities of the kinetics and thermobaric parameters of the hydrate formation process is an urgent problem. Thus, the object for research is the parameters of the beginning of mass gas hydrates crystallization in reservoir systems. At the same time, the most reliable results can be obtained in the process of laboratory monitoring of processes in reservoir systems and technological equipment directly at industrial facilities.
The process of hydrate formation at the phase boundary is manifested by the formation of a thin hydrate layer in the form of a film. In the course of experimental studies, it was established that this process is visually fixed by the transformation of the mirror surface of the phase boundary into a matte one. The distortion effect of the interphase boundary is explained by the formation, growth, massive and chaotic accumulation of gas hydrate microcrystals at this boundary. In the work, based on the results of theoretical and experimental studies, the methodology for operational laboratory determination of parameters of mass gas hydrate crystallization is substantiated. The essence of the technique is to establish the parameters for the moment of mass gas hydrates crystallization based on the fixation of the optical distortion effect of the reflection of the light source on the mirror of the liquid-gas interphase surface. The results of empirical studies are based on optical phenomena observed at the interfacial surface of the gas hydrate layer and gas. They were studied using microscopy, fixation and image processing methods. The main experiments result was the information recorded by the optical system and obtained after fixing the pressure and temperature.
The technique can be used to establish and operationally control the moment of mass gas hydrates crystallization directly at the objects of the oil and gas industry (during the implementation of technological processes). This will make it possible to effectively prevent clogging of technological equipment with the solid gas hydrate phase, as well as to prevent overuse of hydrate formation inhibitors. At the same time, the only limitation of the application for this technique may be the low light permeability of the aqueous solution as part of the formation system.
Increase of cracking resistance of ceramic masses of low-plastic clay
Authors: Subbota Іrіna , Spasonova Larysa , Sholom Аnastasia
Published: March 2023

The object of research is the physical and chemical processes of forming the structure and properties of ceramic masses based on local low-melting clay raw materials of the Kyiv region of Ukraine by adjusting the chemical and mineralogical composition and technological regimes.
Building ceramic materials are durable, ecological and natural. They provide increased comfort of buildings due to the creation of a favorable temperature and humidity climate of the premises. When using low-melting raw materials in production, there is a need to develop ways and methods to improve the quality of building ceramics. The efficiency of the manufacture of ceramic products largely depends on the processes that occur during drying. This is of crucial importance and affects the quality of finished products and accounts for 10–12 % of the total cost of finished products.
Polymineral clay compositions with the addition of natural mineral raw materials are mainly used for the production of construction materials. For effective use of these materials, it is necessary to study their technological properties. Therefore, the question of researching masses based on low-melting clays with high sensitivity to drying, and the use of zeolite-containing mineral rock as an admixture is relevant. This will allow expanding the nomenclature of building ceramics products. Modern physico-chemical and physico-technological methods of research of raw materials and masses based on them during drying were used to solve the task of obtaining ceramic material from local raw materials with the use of a non-deficient natural additive of zeolite-containing rock as an admixture. The conducted studies indicate that the addition of zeolite-containing rock can be used to improve the drying properties of ceramic masses based on low-melting clays. Adding admixture of zeolite-containing rock also increased the compressive strength of finished products, which ensures defect-free transportation of products to other technological operations.
Construction and method of assessment and research of the parameters of a load-lifting winch with a sectional disc drum
Authors: Horbatenko Yuriy , Semenchuk Roman
Published: March 2023

The object of the study is a load-lifting winch with a sectional-disc drum for single-row multi-layer laying of flexible elements, cargo cables and power cables, during their winding, electrically protected. The winch is intended for suspension and lifting and lowering of illuminated devices and equipment in closed rooms.
In the process of research (constructive development, determination and analysis of parameters), the problem of creating a winch design of the specified type with a qualitatively increased overall level of functionality is solved according to the indicators:
1) electrical insulation, compactness and necessary strength of fastening of flexible elements, lifting cables and power cables on the drum;
2) controllability of the drive: in transitional periods – to ensure smooth acceleration-stopping of the suspension; in the period of constant movement – to ensure a constant speed of the suspension during raising and lowering.
Electrical insulation between the power cable, the drum and other parts of the winch is created by using parts (discs) made of synthetic insulating material, for example, fiberglass, in the construction of the drum. Clamping of flexible elements between the disks in specially profiled C-shaped ring grooves, on the ends of the hub, of the disks ensures the necessary strength and compactness of the attachment. The smoothness of starting (stopping) of the drive and the constant speed of the suspension during the period of constant movement are established by adjusting the frequency converter in the drive control system according to the parameters determined by a specially developed methodology.
The obtained results, constructive solutions and methods of research (estimation and analysis) of winch parameters can be used in the design of the structure and adjustment of the control system of lifting devices of this type.
Development of the control system for LEGO Mindstorms EV3 mobile robot based on MATLAB/Simulink elements
Authors: Dong Chengjian , Povorozniuk Oleksii , Topalov Andriy , Wang Kai , Chen Zhicong
Published: March 2023

The Mindstorms EV3 robot, developed by LEGO, is one of the popular robots that has been widely used in various fields. Unlike previous versions of mobile LEGO robots, EV3 allows the development of real-time applications for teaching a variety of subjects, as well as for conducting research experiments. The object of research in this case is the Mindstorms EV3 robot connected to MATLAB/Simulink. The design consists of a controller, one color sensor, two servo motors and one support wheel. Each servo motor is built on a DC collector motor with a matching gearbox and has the ability to measure the number of revolutions corresponding. A digital sensor with a sampling frequency of 1 kHz is used as a color sensor, which can determine the color or brightness of light. Despite its popularity, the EV3 robot control system in interaction with the MATLAB/Simulink programming environment is a rather complex solution and therefore requires further research. The scientific part of the research focuses on discovering the regularities of the Mindstorms EV3 control system, developing a control system model, and exploring the potential of MATLAB/Simulink to expand the robot's capabilities. An analysis of the main elements of the control system, such as sensors and servos, was carried out. The graphs of the dependences of the characteristics of the servo drives were built and the efficiency of the robot movement was checked depending on the parameters set in the program. The result of the development of the mobile robot control system was the adjustment of the mobile robot movement regulators along a given trajectory in the form of a drawn line, which allowed estimating the maximum permissible speed of the robot movement. The presented research and development of a control system based on MATLAB/Simulink elements allows using the proposed method to control a mobile robot with high precision, analyze and verify the robot's electromechanical parameters in real time. This control system has a high potential and can practically be integrated into industrial objects of mobile robotics, provided types the sensors and executive mechanisms of the mobile robot match.
Application of SWOT analysis to justify the strategy of hotel business enterprises
Authors: Panteleiev Volodymyr
Published: March 2023

One of the important areas of action in Ukraine is the restoration of the sphere of activity of hotels with the reduction of restrictions after COVID-19 in the conditions of the russian federation's war against Ukraine. Using the experience of hotels in other countries will be useful in restoring the tourism industry in Ukraine. Disadvantages in the operation of hotels arise from the fact that management decisions are sometimes made intuitively, modern innovative management methods, such as SWOT analysis, are not used.
The object of the research is the influence of the owner and management on the review of the business strategy in the critical use of the hotel's capabilities with the help of SWOT analysis. The problem of improving business management was solved at the stage of considering options for improving the hotel's operations. The results were to show the chance of choosing the optimal business strategy when systematically considering options for management decisions regarding the future of the hotel using SWOT analysis techniques. When applying a SWOT analysis, the weaknesses and strengths of the hotel are modeled; but it requires special statistical knowledge.
In the paper, based on the processing of studied of the hospitality industry, examples of SWOT analysis experience for the implementation of business strategy by hotels in countries with a developed tourism market are indicated. Consolidated information is formed on the components of a SWOT analysis of a hotel business strategy according to the authors' proposals. The process of SWOT analysis in improving the activity of Ukrainian hotels at the stage of planning and implementation of strategic directions is revealed. The formation of an information base is outlined with an integrated approach in the process of implementation. Organizational measures for implementing the hotel strategy according to SWOT analysis are indicated. Conclusions are drawn and directions for further research are shown.
The obtained results are the process of making management decisions based on a set of market data, which determines the application of a certain sequence of recognized stages (algorithm). A SWOT analysis, which was prepared by eliminating all the ideas of the participants and ranking them in order of importance, will combine a large problem into a report that is more understandable to individuals and must be put into practice by them.
Experimental justification of the use of synthetic products for strengthening soils of buildings and structures
Authors: Sagybekova Akmaral , Kabdullagazy Nauruzbayev , Orazbayeva Dinara , Alimtaikyzy Pana
Published: March 2023

Introduction: The purpose of the research of the scientific article is to study the stability of slopes and their reinforced with synthetic materials and the influence of reinforcement elements on the stress and deformation of joint soil massifs. Materials and Methods: At article are given: the tests were carried out in the task of the head of the tray with the use of synthetic materials. Results and Discussion: The use of technical materials for solving the issues of strengthening slopes and slopes is very relevant today. Synthetic geosynthetics of various production methods are required to perform the following functions in combination: reinforcement - reinforcement with materials of slopes, walls of pits and slopes of embankments, bases as a result of the redistribution of stresses arising in soil materials, and the soil mass under the action of loads from vehicles and its own weight; protection - prevention, exclusion or slowdown of the process of soil erosion, prevention of interpenetration of products of contacting layers; filtration - prevention, exclusion (slowdown), solution of the process of penetration of pound particles into drainages (filter) or their removal (reverse filter); drainage - acceleration, slowing down the arrival, removal of water filtration; waterproofing - reduction or diversion, exclusion of water inflow into the soils of the working layer of the subgrade. Conclusions: In tests, synthetic meshes are used to ensure the strength of the edge of the slope at loads of 100 kPa, 200 kPa, 300 kPa: a method for applying the method of strengthening the edge of the slope, with the most compacted base soil and the use of reinforcement elements, is proposed, which leads to an increase in the strength of subsiding soil bases and the edge of the slope during the construction of buildings and structures.
Genome – wide Analysis and Characterization of Eucalyptus grandis TCP Transcription Factors
Authors: İLHAN Emre , KASAPOĞLU Ayşe Gül , MUSLU Selman , AYGÖREN Ahmed Sidar , AYDIN Murat
Published: March 2023

TCPs, a small transcription gene family, serve in developmental processes such as branching, flowering, and growth of plants. In this study, the TCP transcription gene family of eucalyptus, which is considered as being important for its medicinal and industrial uses was bioinformatically investigated. A total of 16 Eucalyptus grandis TCP (Egra-TCP) genes were found to be distributed on chromosomes 1, 2, 4, 6, 7, 9, 10 and 11. Several segmentally-duplicated gene couples including Egra-TCP-7/Egra-TCP-11, -13 and -16, Egra-TCP-6/Egra-TCP-12 and -15, Egra-TCP-12/Egra-TCP-15 and Egra-TCP-11/Egra-TCP-13 were discovered. Egra-TCPs were divided into three main clades based on phylogenetic analysis, motif and gene structure. While Egra-TCP-10 has the highest molecular weight with 47.19 kDa, the lowest one was Egra-TCP-1 with 21.68 kDa. Twelve Egra-TCP genes were found to have no introns. On the other hand, Egra-TCP-7, -15 and -16 genes have single intron. The orthologous relationships among E. grandis/Arabidopsis thaliana and E. grandis/Vitis vinifera were found through synteny analysis. Digital gene expression profiles of Egra-TCP genes in tissues such as xylem, phloem, shoot tips, young & mature leaf were revealed high expression pattern. The findings of this study could make significant contributions to the biotechnology field by providing new knowledge and serve additional information for understanding the molecular basis of the TCP gene family in the eucalyptus plant.
Niş Pazar Bölümü Olarak Engellilerin GSM Operatörü Seçim Kriterleri Üzerine Nitel Bir Araştırma
Authors: YAPRAK Burak , COŞAN Bilal
Published: March 2023

Sosyal politikaların uygulanmasında başat aktör merkezi ve yerel yönetimler olmasına rağmen günümüzde işletmeler de dezavantajlı gruplara yönelik sosyal sorumluluk projeleri, kampanyalar ve/veya pazarlama iletişimi geliştirmektedir. Bu çalışmanın temel amacı, Dünya Sağlık Örgütü tarafından dezavantajlı grup olarak nitelendirilen ve pazarlama bağlamında ise bir niş pazar bölümü olarak ele alınan engellilerin GSM operatörlerinden genel beklentilerinin, işletmelerin engellilere yönelik pazarlama iletişiminin ve engellilerin GSM operatörlerini seçerken göz önünde bulundurdukları kriterlerin derinlemesine incelenmesidir. Çalışmanın önemi, geçmiş yıl çalışmalarında nadiren ele alınan engellilere yönelik pazarlama iletişiminin değerlendirilmesidir. Araştırma kapsamında veriler, derinlemesine mülakat yöntemi kullanılarak toplanmıştır. Toplanan veriler, nitel araştırma yöntemlerinden birisi olan içerik analiz yöntemi ve sürecine bağlı kalınarak analiz edilmiştir. Analiz sonuçları ise betimsel analiz tekniği kullanılarak yorumlanmıştır. Araştırma sonucunda, adil fiyat ve hizmet kalitesi kodlarından oluşan Engellilerin GSM Operatöründen Genel Beklentileri; pazarlama iletişimi farkındalığı kodundan oluşan GSM Operatörünün Engellilere Yönelik Pazarlama İletişimi ve algılanan değer, pazarlama iletişiminin etkinliği ve çekim gücü kodlarının dahil olduğu Engellilerin GSM Operatörü Seçim Kriterleri kategorileri belirlenmiştir. Araştırma sonucunda, 1980’li yıllardan sonra benimsenen ve sosyal politikaların yalnızca devlet tarafından uygulanmaması gerektiğini savunan neo-liberal politikalarla değişen sosyal devlet anlayışına paralel olarak, aralarında kâr amacı güden işletmelerin de bulunduğu hükümet dışı örgütlerin, engellilerin de dahil olduğu dezavantajlı grupların sosyal hayata adil katılması yönünde çeşitli adımlar attığı görülmüştür. Araştırma sonucunda ayrıca hükümet dışı bir örgüt olarak işletmeler tarafından engellilere özel kampanyalar, fiyat indirimi ve engelliler için erişilebilir mağaza gibi pazarlama iletişimlerinin yürütülmesi, katılımcıların bir kısmı için GSM operatörünün seçilmesi hususunda belirleyici kriter olmasına rağmen bazı katılımcılar için ise bu pazarlama çabalarının belirleyici unsur olmadığı sonucuna ulaşılmıştır.
Eye morphology and colour preferences in a semi-field test of the pine pest, Sirex noctilio (Hymenoptera: Siricidae)
Authors: Guignard Quentin , Spaethe Johannes , Slippers Bernard , Nikolic Natasa , Allison Jeremy D.
Published: March 2023

The woodwasp, Sirex noctilio, is a global pest of pines. Although it is known to be attracted to light and possess sexually dimorphic body colouration, the visual ecology of S. noctilio is poorly understood. Photoreceptor sensitivity of the compound eyes in S. noctilio is not sexually dimorphic. These previous results suggest that colour tracking of one sex by the other might not be an important input for mate searching. This study aimed to expand our knowledge of the visual system of S. noctilio by means of i) morphological description of the compound eyes and ocelli; and ii) semi-field behavioural tests of the colour preference of newly emerged wasps. Eye and ocellus morphological features were investigated in 21 males and 21 females. Measurement of male and female median ocellus diameter, compound eye surface area, number of ommatidia and facet diameter varied from 0.22 to 0.40 mm, 0.589 to 2.277 mm2, 1820 to 4207 and 1.88 × 10–2 to 2.82 × 10–2 mm, respectively. In addition, all traits significantly correlated with body size. Male and female wasps emerged from infested host material in a flight cage with five traps, each reflecting a different colour. Analysis of trap captures did not identify any colour preference, but an effect of trap location was observed with traps in the north-eastern position capturing more woodwasps, suggesting that other factors, e.g., global landmarks or other non-colour visual cues might guide initial flight behaviour of S. noctilio.
Do thermal requirements of Dichrorampha odorata, a shoot-boring moth for the biological control of Chromolaena odorata, explain its failure to establish in South Africa?
Authors: Nqayi Slindile , Zachariades Costas , Coetzee Julie , Hill Martin , Chidawanyika Frank , Uyi Osariyekemwen , McConnachie Andrew
Published: March 2023

Chromolaena odorata (L.) RM King and H Rob. (Asteraceae) has been subject to a biological control programme in South Africa for over three decades. A shoot-tip boring moth, Dichrorampha odorata Brown and Zachariades (Lepidoptera: Tortricidae), originating from Jamaica, was released as a biological control agent in 2013 but despite the release of substantial numbers of the insect, it has not established a permanent field population. Because climate incompatibility is a major constraint for classical biological control of invasive plants, and based on the differences in climate between Jamaica and South Africa and field observations at release sites, aspects of the thermal physiology of D. odorata were investigated to elucidate reasons for its failure to establish. Developmental time decreased with increasing temperatures ranging from 20 °C to 30 °C, with incomplete development for immature stages at 18 °C and 32 °C. The developmental threshold, t, was calculated as 8.45 °C with 872.4 degree-days required to complete development (K). A maximum of 6.5 generations per year was projected for D. odorata in South Africa, with the heavily infested eastern region of the country being the most eco-climatically suitable for establishment. The lower lethal temperature (LLT50) of larvae and adults was –4.5 and 1.8 °C, respectively. The upper lethal temperature (ULT50) for larvae was 39.6 °C whilst that of adults was 41.0 °C. Larvae thus had better cold tolerance compared to adults whereas adults had better heat tolerance compared to larvae. The critical thermal (CT) limits for adults were 3.4 ± 0.07 to 43.7 ± 0.12 °C. Acclimation at 20 °C for 7 days resulted in increased cold and heat tolerance with a CTmin and CTmax of 1.9 ± 0.06 and 44.4 ± 0.07 °C respectively, compared to the relative control, acclimated at 25 °C. Acclimation at 30 °C improved neither cold (CTmin: 5.9 ± 0.08 °C) nor heat tolerance (CTmax: 42.9 ± 0.10 °C). These results suggest that thermal requirements fall within field temperatures and are thus not the main constraining factor leading to poor establishment of D. odorata in South Africa.
The Effect of Accessories Used in Interior Furniture on Increasing Safety and Prevention of Overturn
Authors: ÖZCAN Süleyman , ÖZCAN Cemal
Published: March 2023

Aim of study: Furniture used indoors; threatens the life safety of users by being knocked over for many reasons such as design, production, user errors, earthquakes, etc. This study was carried out to determine the effects of the variables related to the foots used in the furniture and the horizontal forces on the overturning of furniture.
Area of study: This study was carried out in Safranbolu Şefik Yılmaz Dizdar Vocational School Interior Design Department test laboratory.
Material and methods: For the experiments, a leg model, which is widely used in the market, was determined and a multi-purpose cabinet was prepared. Loads were applied to this cabinet with the mechanism established within the scope of TS 9215 and TS EN 14073-2 standards. The effects of the obtained results on overturning were evaluated by analysis of variance and Duncan multiple comparison test.
Main results: It has been observed that the variables such as the position, diameter, height of the foot used in the furniture and the height of the force causing the overturning are effective at various rates in the safe use of the furniture. It has been calculated that the effect of force application heights on overturning is 50.82% at most and foot positions 12.4% at most.
Highlights: The results obtained can be used to increase indoors safety by making it more difficult for overturning of the furniture.
DNA extraction (BOMB) v2
Authors: Hung Tsu-Chun
Published: March 2023

DNA extraction (BOMB)
Design of Robust Control for Vehicle Steer-by-Wire System
Authors: Husain Suha S. , Kadhim Mina Qays , Al-Obaidi Abdulkareem Sh. Mahdi , Hasan Alaq F. , Humaidi Amjad J. , Al Husaeni Dwi Novia
Published: March 2023

This study presented the design of a robust controller based on Integral Sliding Mode Control (ISMC) for controlling the Vehicle Steer-by-Wire (VSbW) system. The dynamic model of the VSbW system is first developed and then the design of ISMC has been conducted via the states of the system. The VSbW system has been described by two terms; one term represents the nominal model, which is free from nonlinearities, and the other term lumps the uncertainties in system parameters. The integral sliding mode controller has been designed for controlling the VSbW system. The control design consists of two parts. The first control part has addressed the nominal term of the system, while the second control part tackles and eliminates the effects of uncertainties and perturbation due to the uncertain term of the system. The numerical simulation has been conducted to show the robustness of ISMC and its capability to reduce the chattering effect in the control signal. In addition, a comparison study in performance has been conducted between the proposed controller and other controllers in the literature. We also carry out bibliometric analysis to see research trends. Based on our analysis, the number of publications regarding the keywords "controller", "steer", and "wire system" changes every year (25 (2018), 56 (2019), 51 (2020), 71 (2021), and 61 (2022)).
Language As a Unifying Nation: The Existence of Digital Literacy in Countering Hoaxes
Authors: Fauziyah Rahmah , Hardini Tri Indri , Sunendar Dadang , Yulianeta Yulianeta , Kurniawan Khaerudin , Halimah Halimah
Published: March 2023

The role of Indonesian as a unifier of the nation is very important in everyday life. The presence of digital literacy greatly affects the acquisition of information for each individual. Students as the nation's successors who are currently faster at mastering technology obtain a lot of information. It should be noted that digital literacy is mastered by students so that it is not easy to accept hoax information. Indonesian as a unifier of the nation must be supported by digital literacy skills, especially as an effort to fight the circulating hoaxes. The use of technology for students becomes a daily activity that is rarely restricted and supervised. The convenience in the digital world also often brings information that must be investigated further. Moreover, if the hoax information received by students is disseminated it can have a bad influence on other people. Data retrieval at SMKN 13 Bandung with descriptive qualitative methods. According to students of SMKN 13 Bandung, the negative impact of hoaxes can harm many people, being wrong in taking action, misleading, causing debate, and facts are no longer believed. Indonesia as a unifying nation today needs to be accompanied by digital literacy skills. Digital literacy can equip students in using technology, evaluating, and then utilizing information in digital media properly and correctly.
Analisis Merril’s First Principles of Instruction Pada Game Edukasi Covid Fighter Dengan Pendekatan Formal Element
Authors: Rahadianto Irfan Dwi , Deanda Tiara Radinska , Mario Mario
Published: March 2023

Teknologi pada media game telah menggeser fungsi yang sebelumnya dikenal sebagai media entertainment menjadi media multi guna, salah satunya adalah sebagai media edukasi. Game saat ini ramai dimanfaatkan oleh banyak pihak untuk menjadi media edukasi yang lebih dekat dan nyaman bagi masyarakat, salah satunya game Covid Fighter yang bertujuan untuk memberikan edukasi terhadap anak sekolah agar pada saat melakukan kegiatan tatap muka di sekolah, siswa/I sudah siap menghadapinya di masa pandemi ini. Merrill’s First Principles of Instruction menyatakan bahwa dalam sebuah edukasi terdapat aspek-aspek instruksi yang harus dimiliki agar pelajar dapat menyerap informasi pelajaran dengan baik. Aspek tersebut diantaranya Problem, Activation, Demonstration, Application dan Integration. Penelitian ini bertujuan untuk menganalisis bagaimana penerapan Merrill’s First Principles of Instruction dalam Mobile Game yang dirancang oleh Palang Merah Indonesia dengan judul Covid Fighter. Analisis data dilakukan dengan menggunakan metode analisis konten. Penelitian ini akan memaparkan apakah Mobile game berjudul Covid Fighter telah menerapkan Merrill’s First Principles of Instruction dengan baik untuk mengedukasi protocol Kesehatan covid pada anak sekolah dasar (SD). Analisis data yang dilakukan menggunakan pendekatan analisis konten Formal Element oleh Fullerton (2019). Hasil penelitian yang telah dilakukan menunjukan bahwa game Covid Fighter telah menerapkan Merrill’s First Principles of Instruction dengan baik agar materi edukasi terserap dengan efektif oleh siswa/I.
The Implementation of School from Home in English for Young Learners' Classrooms
Authors: Al Farid Azharra Aninda Putri , Damayanti Ika Lestari
Published: March 2023

The sudden occurrence of the coronavirus pandemic (COVID-19) has affected the education sector in Indonesia. The Indonesian government responded to this matter and issued a policy on the implementation of distance learning or known as the school from home. School from home has been applied to all education levels in Indonesia, including primary schools. This qualitative case study investigates the implementation of school from home in English for young learners' classrooms at a primary school in Indonesia. The data was collected through online classroom observation in second, fourth, and sixth-grade classrooms and interviews with five English teachers who taught in first until sixth-grade classrooms. Data from the interview were analyzed using thematic analysis, resulting in three generated themes on the implementation of school from home in English for young learners' classrooms. The themes include teachers' readiness to implement school from home, teachers' strategies to implement online learning as part of the school from home, and teachers' strategies to overcome challenges in online learning. The results of the study indicated that the implementation of school from home requires thorough preparation and has the potential to be implemented in English for young learners' classrooms, especially in the upper-grade classrooms of primary schools.
Resistencia natural a la infección por el VIH-1. Revisión sistemática de la literatura
Authors: Higuita-Gutiérrez Luis Felipe , Zapata-Builes Wildeman , Alarcón-Uribe Santiago
Published: March 2023

Introducción: la investigación sobre la infección por el VIH-1 ha permitido identificar individuos que, a pesar de exponerse en múltiples ocasiones al virus, no presentan signos de infección. Se les conoce como expuestos a VIH seronegativos o HESN (del inglés HIV-exposed seronegative). Esto sugiere la existencia de mecanismos de resistencia natural al VIH-1.Objetivo: describir la información disponible en la literatura sobre los HESN y sus mecanismos de resistencia natural.Métodos: se realizó una revisión sistemática de la literatura de enfoque amplio en seis bases de datos y se siguieron las etapas de la guía PRISMA. El análisis de la información se hizo con frecuencias absolutas, relativas y con un análisis de redes de colaboración científica en Ghepi.Resultados: se encontraron 124 artículos de 24 países que en total suman 4079 individuos HESN. La comunidad científica interesada en este tema estuvo conformada por 688 investigadores de Estados Unidos, Italia, Canadá, España, Brasil y Colombia. Los criterios para definir a un individuo como HESN fueron altamente variables. Se identificaron 33 mecanismos diferentes relacionados con la resistencia natural al VIH-1, dentro de los cuales el más común fue los factores solubles (en mucosas y sangre periférica) (30,6 %), seguido por la mutación Δ32 (14,5 %), los alelos KIR/HLA (10,5 %) y la IgA neutralizante (10,5 %).Conclusión: existe una comunidad científica consolidada con interés en estudiar la resistencia natural a la infección por VIH-1. Se observó una significante diversidad en los mecanismos inmunológicos involucrados en la resistencia natural al virus y se demostró una alta heterogeneidad en los criterios para definir las poblaciones como HESN.
Reasignación de liquidez y costo de bienestar de la inflación en Colombia
Authors: Frasser-Lozano Cristian Camilo , Pájaro-Gallego Juan Camilo
Published: March 2023

Este artículo evalúa el rol de la reasignación de liquidez vía crédito en la mitigación del costo de bienestar de la inflación. Presenta dos modelos teóricos: con y sin reasignación de liquidez. En el modelo con reasignación de liquidez, el dinero y el crédito coexisten. En particular, el dinero exhibe un doble beneficio: se puede usar para financiar consumo o para prestarlo a agentes con necesidades de liquidez. Este último uso de los saldos monetarios a través del crédito sirve para amortiguar el costo de bienestar la inflación. Ambos modelos son calibrados para la economía colombiana entre 1994 y 2021, lo cual permite medir el impacto de la inflación sobre el bienestar en términos del PIB. El costo de bienestar de reducir la inflación 10 puntos porcentuales sin reasignación de liquidez, bajo el protocolo de Nash y con un poder de negociación menor a 1, oscila entre 2,6% y 4,2% del PIB, mientras con reasignación de liquidez está entre 0,9% y 3,6% del PIB. El costo de bienestar asociado a una inflación positiva es siempre menor con reasignación de liquidez.
Descripción prosódica de las emociones actuadas en español mexicano
Authors: González Franco Ofelia Elizabeth , Carrasco Ortiz Elia Haydée , Velásquez Upegui Eva Patricia
Published: March 2023

En este artículo se realiza la descripción de los patrones entonativos de cinco emociones —enojado, triste, neutral, tranquilo y emocionado— en enunciados aseverativos de un corpus oral actuado de tres hablantes mujeres de Querétaro, México. Este trabajo se justifica tras una breve revisión de los estudios en torno a la prosodia emocional del español y su relación con la teoría bioinformacional. A partir del análisis de los datos se obtiene una caracterización de la curva tonal por emoción, con valores por arriba de los umbrales de percepción, que pueden utilizarse como referencia para futuros estudios descriptivos o de percepción.
psicolingüística en la formación de profesores de lengua castellana: una aproximación desde los géneros discursivos
Authors: Rojas García Ilene
Published: March 2023

La psicolingüística es indispensable dentro del currículo de formación de maestros de Lengua Castellana, siempre que enfatice en el estudio de los procesos de comprensión y producción textual. En este sentido, la presente investigación examina dos géneros discursivos pertinentes para ser incluidos como material de estudio en el aula universitaria de esta asignatura, para lo cual, se utiliza como marco teórico y metodológico la lingüística sistémico funcional. El resultado es la descripción de los núcleos temáticos y la estructura lingüística de artículos de investigación en el área, a partir de los cuales se establecen las directrices para una intervención didáctica.
Colaboración interdisciplinar: estrategia de formación docente en escritura en la universidad
Authors: Arenas Hernández Karina Alejandra , López Gil Karen
Published: March 2023

Este artículo presenta una revisión sistemática exploratoria sobre formación docente en escritura, que incluyó 53 artículos indexados en Scopus, Ebsco, ProQuest Central, Scielo y Redalyc. Los resultados muestran estrategias de colaboración entre docentes de lenguaje y de otras disciplinas, principalmente para diseñar orientaciones y criterios de evaluación de tareas escritas. Se reconocieron diferentes aproximaciones teóricas sobre escritura académica y trabajo interdisciplinario. Se evidencia el potencial que tiene la colaboración descrita como estrategia para formar docentes universitarios en escritura y se sistematiza su funcionamiento, lo que puede orientar esfuerzos para abordar la escritura como herramienta de aprendizaje en las disciplinas.
Fluidez proteica. Poética del folletín y el melodrama en la obra narrativa de Blanca Isaza (1898-1967)
Authors: Ochoa Marín Jorge Mario
Published: March 2023

Este artículo estudia la obra narrativa de la escritora Blanca Isaza recogida en su libro Cuentos de la montaña (1919-1926), con especial énfasis en los cuentos publicados en revistas y periódicos entre 1920 y 1921. Estos cuentos son abordados desde la estética del melodrama, el folletín y, en general, la narrativa popular del siglo xix, explorando así una corriente alterna del cuento colombiano en las primeras décadas del siglo xx.
El jarro/cántara metálico con tapadera del tesoro califal "Parque Cruz Conde" (Córdoba)
Authors: Azuar Ruiz Rafael
Published: March 2023

Presentamos el estudio del jarro metálico que contenía el tesoro de dírhams califales, aparecido en el Parque Cruz Conde de Córdoba. Analizamos sus precedentes tipológicos bizantinos y sus paralelos coetáneos islámicos orientales. De igual forma, se efectúa una revisión de las posibles rutas de su llegada: desde las costas del Mediterráneo oriental o por el Atlántico en alguna de las diversas incursiones que realizaron los vikingos en las costas de al-Andalus llegando a saquear la propia ciudad de Sevilla. Por último, proponemos el contexto histórico de su llegada a la Península.
Monitoring Heavy Metal Bioaccumulation in Rivers Using Damselflies (Insecta: Odonata, Zygoptera) as Biological Indicator
Authors: Jumaat Ahmad Hadri , Ab Hamid Suhaila
Published: March 2023

Contamination by pollutants in freshwater ecosystem has been identified extensively in river, sediments, and freshwater biota. Pollutants may have incorporated into the sediments and accumulated in tissue of aquatic organisms which persist as difficult to degrade matter in upper trophic level. Therefore, few selected heavy metals were measured from the river sediment and tissue of Odonata larvae collected from the selected rivers using inductively coupled plasma optical emission spectrometry (ICP-OES). The results showed metals in Odonata tissue were higher than in the sediments. Mn and Zn were found in greatest concentrations both in sediment and Odonata’s tissue. Biota-sediment accumulation factors (BSAF) were computed based on these data, and it was discovered that all values of BSAF for Cd, Cu, Mn, and Zn were typically high (BSAF >1). In conclusion, the rivers contamination induced accumulation of heavy metal in the river sediments and Odonata larvae (P. microcephalum, P. fraseri, and C. marginipes). The highest concentration value was calculated as 29.23 for Cd in the C. marginipes. The high concentrations of this element in the insect body tissue has shown a trace of bioaccumulation and may pose biomagnification to organisms in the upper trophic level. The results of this study indicated that damselfly is reliable to become a bioindicator for heavy metals particularly pollution in the river.
Ramalan Kesesuaian Habitat Rusa Sambar (Rusa unicolor) di Kompleks Hutan Utama Taman Negara dan Sekitarnya
Authors: Khodri Nur Fatin , Lihan Tukimat , Ahmad Mustapha Muzneena , Mohd Taher Taherah , Tajul Ariffin Nurul Atikah , Abdullah Nur Izzati , Amat Darbis Nurul Darsani , Razali Siti Hajar Atiqah , Md Nor Shukor
Published: March 2023

Populasi rusa sambar (Rusa unicolor) mengalami penurunan dan dikategorikan sebagai rentan oleh Kesatuan Antarabangsa untuk Pemuliharaan Alam dan Sumber Asli pada tahun 2014. Objektif kajian ini untuk mengenal pasti faktor sekitaran yang mempengaruhi kesesuaian habitat rusa sambar, yang terdiri daripada kecerunan, ketinggian, guna tanah, jarak daripada bandar, jarak daripada sungai dan litologi dianalisis menggunakan sistem maklumat geografi (GIS). Data kehadiran rusa sambar dari tahun 1992-2008 diintegrasikan dengan faktor sekitaran menggunakan model entropi maksimum untuk mengenal pasti habitat yang sesuai bagi rusa sambar di kompleks hutan utama Taman Negara. Hasil kajian ini menunjukkan jarak dari sungai menyumbang peratusan paling tinggi dalam model kesesuaian habitat iaitu 47.7%. Manakala jarak dari bandar, jenis guna tanah, ketinggian, kecerunan dan litologi menyumbang sebanyak 21.8%, 16.1%, 7.2%, 6.7% dan 0.4%. Habitat yang sesuai bagi rusa sambar meliputi 37% daripada keseluruhan kawasan kajian (2,218,389 hektar). Kajian penentuan potensi habitat rusa sambar yang sesuai di kompleks hutan utama Taman Negara penting untuk pengurusan hidupan liar seperti aktiviti pelepasan semula.
Effects of Water Addition Level on Physical Properties, Rheological Profile and Sensory Evaluation of Gluten-Free Bread: A Preliminary Approach
Authors: Mohd Zain Norashikin , Abd. Ghani Maaruf , Mohd Kasim Zalifah
Published: March 2023

The amount of water in gluten-free recipes is very important to the quality of the end product. The research aimed to develop an alternative formula for gluten-free bread using different water levels. This research was conducted to determine the physical properties, rheological profile and sensory evaluation of natural gluten-free bread produced by adding different water levels to the recipe without adding hydrocolloid. Five types of bread with different levels of water at (A) 80%; (B) 90%; (C) 100%; (D) and control dough: 105% (control 1); (E) 60% (wheat bread-control 2) of the flour basis were investigated. Control 1 is the standard level of water for making gluten-free bread, while control 2 is the standard level of water for preparing wheat bread. Sample A has a lighter crust and crumbs, as well as a white index value and lower ΔE values comparable to wheat bread, better volume, increased pore size sharply and shows higher G' and G". G' decreased as the amount of water in the dough increased. All dough formulations had higher gelatinisation enthalpy change (ΔH) values than sample A and sample E. The bakery sector could use the findings to design and reformulate the recipes of diabetic and/or reduced calorie and gluten-free bread recipes to better fulfill consumers' expectations.
Ameliorative Effects of Alpha Lipoic Acid, Quercetin and Ascorbic Acid Against Zinc Oxide Nanoparticles Induced Hepatic Damage: In Vivo
Authors: Sajjad Sumera , Saeed Laiba , Malik Husna , Naseem Bushra , Rashid Farzana , Liaqat Iram , Khalid Nida , Naseem Amna
Published: March 2023

The current study envisioned to evaluate time related protective effect of quercetin, alpha lipoic acid and ascorbic acid on liver of mice against sub-acute exposure of zinc oxide (ZnO-NP) nanoparticle. Male Swiss albino mice (n=72) were randomly divided into eight groups (n=9, each group). G1 received saline solution 0.9%; G2 received quercetin (100 mg/kg b.w); G3 received alpha lipoic acid (100 mg/kg b.w); G4 received ascorbic acid (100 mg/kg b.w); G5 received ZnO-NPs (50 mg/kg b.w); G6 received ZnO-NPs with quercetin; G7 received ZnO-NPs with Alpha lipoic acid and G8 co-treated with ZnO-NPs and ascorbic acid for 21 consecutive days. Body weight, hepatosomatic index and plasma biochemical parameters (total protein, albumin, globulin, total cholesterol, triglycerides, high density lipoproteins, low density lipoprotein, aspartate aminotransferase, alanine transaminase, alkaline phosphatase & bilirubin) were estimated. ZnO showed significant increase in body weight and cause alterations in all biochemical parameters. Co-administration of quercetin (100 mg/kg b.w), alpha lipoic acid and ascorbic acid daily along with ZnO-NPs, significantly ameliorate the dramatic alteration in biochemical parameters and hepatocellular necrosis caused by ZnO nanoparticles. Brine shrimp larvae cytotoxicity assay of ZnO nanoparticles showed 0% mortality. Present study concluded that all three active ingredients showed hepatoprotective effects against nanoparticles induced time dependent toxicity.
Atık mermer tozu katkılı kil tuğlaların fiziksel özelliklerinin araştırılması
Authors: İSRAİL Lina , KÖSEOĞLU Kemal
Published: March 2023

Atıkların yeniden kullanılması ya da geri dönüştürülmesi üzerinde titizlikle durulması gereken önemli bir konudur. Bu çalışmada mermer madenciliğinde yan ürün olarak nitelendirilen mermer tozu kil tuğlalara katılarak değerlendirilmiştir. Hazırlanan tuğlalara sinterleşme sıcaklığı 950o, 1113o ve 1185o C olan üç farklı endüstriyel pişirim rejimi uygulanmıştır. Doğrusal pişme küçülmesi, pişme mukavemeti, su emme ve renk gibi fiziksel testler ile tuğlaların ulusal ve uluslararası standartlara uygunluğu araştırılmıştır. En uygun katkı oranının %20 olduğu görülmüştür. Pişme küçülmesinin %0,06 ile 2,4 arasında değiştiği, pişme mukavemet değerinin en düşük 6 MPa en yüksek yaklaşık 37 MPa olduğu ve su emme değerinin ise %13 ile %20 aralığında kaldığı tespit edilmiştir. Sıcaklık artışı ile kırmızı ve sarı renk değerlerinde azalma görülmüştür. Çalışmanın doğal kil kaynakların daha az kullanımı ve atıkların değerlendirilmesi açısından büyük önem taşıdığı düşünülmektedir.
PURITAN PHILOSOPHY OF THE AMERICAN THINKER JOHN COTTON
Authors:   Taras Shevchenko National University of Kyiv, Ukraine, Sobolievskyi Yaroslav
Published: March 2023

The article presents a historical and philosophical study of the main philosophical ideas of the American thinker of the Puritan era, John Cotton (1585–1652). The renowned thinker worked as a priest both in England and in the American colonies. He was known as an outstanding theologian and Puritan philosopher of the Massachusetts Bay Colony. The future philosopher received his education at Trinity College and Emmanuel College in Cambridge. His reputation was associated with his ability to preach and his knowledge of theology, but his views also contained a place for philosophical reflections. He was a supporter of Puritan philosophy and was opposed to Catholicism, which was reflected in his works. In addition, he opposed the Anglican Church, which he considered insufficiently separated from Catholicism. However, in his philosophy of religion, there was a desire to purify faith from unnecessary burden. His ideas and views on religion made it possible to create the Puritan movement, which placed great emphasis on personal faith and rejected many customs and rituals that were considered unnecessary. On the one hand, J. Cotton was a critic of the church institution, but on the other hand, he did not support separation from it. He maintained a balance in his views and believed that the expulsion of his ideological opponent, Roger Williams, was related to the danger of his ideas. He believed that man cannot save himself and depends on God's grace. The American thinker took part in important polemical discussions in the American colonies, where his religious philosophy determined the settlers' way of life. He was a supporter of philosophical dialogue and believed that truth arises only in dialogue.