bluuebunny/crossref_metadata_2025 huggingface dataset:
Entre tradición y renovación: manifestaciones del horror ficcional en la narrativa breve de Emilio Carrere
Authors: Sánchez Martínez Andrés
Published: June 2021

Este artículo se centrará en las diferentes formas que adquiere el horror en algunos relatos cortos de Emilio Carrere. Para ello, se partirá de una concepción teórica del horror como una de las consecuencias del efecto fantástico en las obras estudiadas. En estos casos, Carrere construye una atmósfera sobrenatural sirviéndose de procedimientos como la recurrencia a motivos de la tradición gótica, al ocultismo tan popularizado en el ambiente modernista o a la introducción de lo insólito por medio de técnicas metaficcionales. Todos estos discursos entrarán además en contacto con el habitual elemento humorístico de la narrativa del autor madrileño, que servirá tanto para desarticular como para acentuar lo fantástico. En última instancia, los elementos fantásticos en la obra de Carrere se revelan como muestras indispensables de otra de las múltiples caras ocultas del modernismo, para cuestionar en esta ocasión las certezas de lo real.
Water Footprint Evaluation of Steel Production in China
Authors: Wen Meng Xi , Gong Xian Zheng , Liu Yu , Li Xiao Qing , Pan Si Jing
Published: June 2021

The shortage of water has become a serious problem in the development of the steel industry in China. Therefore,it is important for research to be done in environment management, estimating the potential improvement of steel industry. This study propose an improved water footprint model of steel production based on the water footprint network methodology and the life cycle assessment framework. The result shows that the water footprint of steel production is 41.09m3/t, which requires larger amounts of direct blue water. The case of China highlights the relevance of clean production, energy efficiency measures, and grading utilization on reducing the water footprint of steel production.
Water Footprint Evaluation of the Production of Float Flat Glass
Authors: Wu Yi Ling , Gong Xian Zheng , Liu Yu , Li Xiao Qing , Tian Xiao Fei , Wang Hong Tao , Ye Chang Xing
Published: June 2021

The ISO14046 water footprint evaluation method was used in this study to calculate the water shortage footprint and water degradation footprint in plate glass production, in order to improve the water efficiency and management level in the production process of plate glass in China. A certain enterprise in Hebei province was selected for investigation in 2018. The results show that the water shortage footprint generated by the production of flat glass was 0.435 m3H2Oeq/weight box. The proportion at raw material production stage was the largest, being 86%, so the water consumption control in raw material mining and the circulating water system should be strengthened and improved to reduce the fresh water consumption. Water degradation footprint in flat glass industry mainly consisted of eutrophication and acidification footprints. The eutrophication footprint was calculated as 0.027 kgNO3-eq/weight box, and water acidification footprint was 0.271 kgSO2eq/weight box. The largest proportion occurred at flat glass production stage. It should be paid attention at this stage, to update the relatively clean production equipments and add the waste gas processing steps to reduce pollution discharge.
Microstructure and Tensile Properties Anisotropy of 7xxx Ultra-Thick Plate
Authors: Zhou Ze Yu , Xiao Xiang , Zhang Wen Jing , Wang Feng Chun , Ren Wei Cai , Liu Cheng
Published: June 2021

The microstructure，texture distribution and tensile property of 7xxx ultra-thick plate was investigated by optical microscopy (OM), scanning electron microscopy (SEM), electron back scattering diffraction (EBSD), transmission electron microscopy (TEM) and tensile tests. The results show that the microstructure, texture and tensile property were inhomogeneous along the thickness direction. A large number of sub-crystals remained on the surface of the thick plate and was accompanied by much recrystallization. Most of the structures were random texture, and the proportion of typical texture was low at the edge. For the center layer, there were also a lot of recrystallized grains and typical deformed texture along the β-fiber (Brass, S, and Copper) was observed. The 1/4 layer of the plate is a transition one, and had the lowest recrystallized fraction. From surface to center, precipitation phases within grains and grain boundaries gradually coarsen, mechanical properties reduced. At the same thickness, the tensile property showed appreciable anisotropy, the L direction was the highest and the S direction was the lowest.
Microstructure and Properties of Q690D High Strength Low Alloy Steel
Authors: Li Fang Po , Li Ning , Lu Cai Hong , Liang Ming Hua
Published: June 2021

As one of the core equipment components of oil and gas drilling rig, derrick is also the main heavy-duty component. Working environment of derrick is quite bad, the material for which should have not only high strength, but also good plasticity, toughness and weldability. In this paper, the chemical composition, microstructure, tensile properties, impact properties and hardness of three typical Q690D high strength low alloy steel manufactured from different methods were studied. The application feasibility of Q690 for drilling derrick manufacture was analyzed. The experimental results show that the carbon equivalent, tensile properties and impact absorption energy of Q690D steel with different thickness obtained by TMCP and Q-T process were obviously higher than the requirement of corresponding standard. TMCP Q690D steel had better toughness, lower carbon content and carbon equivalent, and its micro-structure was granular bainite. Carbon content of Q-T Q690D steel plate was relatively higher than that of TMCP Q690D, and the toughness was slightly lower than that of TMCP Q690D. The microstructure Q-T Q690D was tempered sorbite, and there was certain zonal segregation in center part. The thickness of steel plate used in derrick was usually less than 40 mm, whose manufacturing technology of Q690D was mature. There is broad application prospect in the field of drilling equipment. The application of Q690D for drilling equipment not only improve the strength grade of equipment materials, but also help to optimize the design of components and ensure service safety.
Mechanical Properties and Microstructure Comparative Analysis of 500MPa Hot Rolled H-Section Different Positions for Ultra-Deep well Platform
Authors: Lu Cai Hong , Li Fang Po , Han Li Hong , Zhang Hui , Yang Shang Yu , Wang Jian Jun , Feng Yao Rong
Published: June 2021

With the increase of drilling depth, the mechanical properties of H-section steel used in drilling platform are more and more demanding. In this paper, the strength, low temperature impact toughness, plasticity, micro-hardness and microstructure of 500MPa hot rolled H-section steel produced by TMCP process were analyzed, and the strengthening mechanism was also studied. The results show that flanges of TMCP hot rolled H-section steel had the best strength and toughness, while the yield strength at web and R Angle was reduced to 91% and 78% of the flange, respectively. The impact toughness at -40°C of web and R Angle was reduced to 86% and 38% of the flange , and the micro-hardness reduced to 91% and 85% of the flange, respectively. The main strengthening mechanism of the TMCP hot rolled H-section steel is fine-grain strengthening, the carbonitride of V precipitation strengthening and surface bainite transformation strengthening.
Research on Vortex Electromagnetic Wave Based on Coding Metasurface
Authors: Ji Ke Feng , Gao Jun , Wu Qi Jun , Cao Xiang Yu
Published: June 2021

The characteristics of vortex electromagnetic wave generated by coding metasurface were studied, and the transmission-type metasurface of vortex wave was designed based on coding unit. It was found that the coding metasurface could replace the quasi-continuous phase to reduce the difficulty of the unit design. But when the orbital angular momentum increased gradually the spacing of two main lobes increased, the side lobes increased, and the vortex waves of other orbital angular momentum reduced. Based on this limitation, this paper optimizes the arrangement of units by genetic algorithm in order to maximize the performance of vortex electromagnetic wave in the limited metasurface size, so that the vortex electromagnetic wave energy is concentrated in the main lobes, thereby enhancing the purity of the orbital angular momentum mode and reducing the electromagnetic wave carrying the orbital angular momentum with other modes, and reduce the main lobes spacing is conducive to propagation. Finally, the feasibility of the method is verified by simulation measurement.
FEM Simulation on Diffusion Bonding of High Purity Tungsten Target
Authors: Jia Qian , Ding Zhao Chong , Qi Yu , Li Han Zu , Li Yong Jun , Teng Hai Tao
Published: June 2021

The FEM (finite element method) simulation was used to study the diffusion bonding deformation of high purity tungsten target. The influence of different welding structure, bonding temperature on the deformation of the final high-purity tungsten target was systematically studied. Meanwhile, some microscopic properties of tungsten target were developed, such as internal stress size and distributions, strain size and distributions. Finally, physical experiments are used to verify numerical simulation results. The results show that the method of adding an intermediate layer can release the residual stress between the high-purity target and back plate. The bonding stress of high-purity tungsten target is mainly concentrated with the tungsten target and the intermediate layer in between, which is easy to fail during the later leveling process. Small deformation of bonding tungsten target can be obtained by low diffusion bonding temperature.
Do depression and its associated factors differ in women daytime and shift workers?: an analysis of the Korea National Health and Nutrition Examination Survey 2018
Authors: Chae Hyun Ju , Kim Mijong
Published: June 2021

Purpose: This study examined health behaviors, use of health services, and depression among women who perform daytime and shift work in South Korea, as well as factors related to depression. Methods: We conducted a secondary analysis using data from the 7th Korea National Health and Nutrition Examination Survey conducted in 2018. Data on women, 1,493 regular daytime workers and 322 shift workers, were analyzed. Results: Shift workers were younger (χ2=43.97, p<.001), had a lower education level (χ2=45.56, p<.001), and lower personal income (χ2=16.85, p=.030) than daytime workers. A higher proportion of shift workers were unmarried (χ2=37.47, p<.001) and they typically worked fewer than 40 hours per week (χ2=69.94, p<.001). The depression score of shift workers was higher than that of daytime workers (t=2.85, p=.005). A higher proportion of shift workers also drank alcohol (χ2=6.49, p=.032) and smoked (χ2=30.79, p<.001). Over 8% of shift workers typically slept fewer than 5 hours per night (χ2=14.17, p=.024). It was confirmed that depression in women shift workers was affected by age, personal income, marital status, health status, and smoking status, in addition to cancer screening participation, unmet medical care needs, and unmet dental care needs. Conclusion: More attention should be given to the health needs of women working shifts. Health promotion programs specific for women shift workers are needed to improve their physical and mental health, encourage use of medical care services, and improve public health policies and systems.
Distal Medial Collateral Ligament Grade III Injuries in Collegiate Football Players: Operative Management, Rehabilitation, and Return to Play
Authors: Acevedo Josue , Boden Allison L. , Greif Dylan N. , Emerson Christopher P. , Ruiz Jeffrey T. , Jose Jean , Feigenbaum Luis A. , Kaplan Lee D.
Published: June 2021

Context

Management of isolated grade III medial collateral ligament injuries is controversial, as both nonoperative and operative management can result in return to play. However, operative management is recommended in elite athletes who have a grade III injury with distal avulsion.

Objective

We present a standardized rehabilitation protocol in a case series of 7 National Collegiate Athletic Association Division I American football athletes who sustained grade III distal medial collateral ligament tears that were repaired operatively, with emphasis on return to play.

Results

Median time to surgery was 4 days (range = 2–67 days). Median time from surgery to noncontact drills was 120.5 days (range = 104–168 days), and median time from surgery to full-contact sport was 181 days (range = 139–204 days). All athletes returned to play at their preinjury level of competition.

Conclusions

Our study highlighted how operative management with a standardized rehabilitation protocol can be applied to Division I football players and result in safe return to play.
Knowledge, attitude, and practice of sudanese pharmacists toward COVID-19 in Khartoum State, Sudan: An online-based cross-sectional study
Authors: Badi Safaa , Hamed Abdalrahman , Abualama Mohammed , Mustafa Mohammed , Abdulraheem Muhammad , Yousef Bashir
Published: June 2021

Background: COVID-19 disease became an outbreak declared by the WHO as a public health emergency that is explicitly threatening the globe. Measures must be taken to control it, and health-care workers' situations need to be assessed. Objectives: The study aimed to assess the knowledge, attitude, and practice of Sudanese pharmacists regarding COVID-19. Materials and Methods: The study was an online descriptive cross-sectional survey, conducted from April to June 2020, among the registered pharmacists in Khartoum, Sudan. Three hundred fifty registered pharmacists were asked to participate in this study, all of them were responded. An online standardized questionnaire was conducted, and data were collected by a convenience sampling method and analyzed using the Statistical Package for the Social Science. Descriptive and inferential statistics were performed. Results: Response rate was 100%, 65,7% of the participants were females. The median age was 27 years, 72.9% of the pharmacists were bachelor degree holders, and 73.1% of participants were community pharmacists. The years of experience were 1–5 years for 54.4% of them. About 69.4% of the participants had sufficient knowledge about COVID-19, 27.1% reported a positive attitude, and 62.6% reported a fair attitude. Moreover, 88.3% of them were wearing facemask, gloves, and frequently use sensitizers. Nearly 47.7% stated that they would not dispense any treatment of COVID-19 without a prescription. Tests revealed that knowledge was statistically significant with gender (P = 0.001) and attitude with age and years of experience (P = 0.039, 0.01), respectively. Conclusions: More than two-third of the participants have sufficient knowledge regarding COVID-19. Only one-tenth of them have a negative attitude, and their practice toward the disease was relatively good.
ODEs together PDEs and Vector Fields in the SoftAge
Authors: Rosa Márcio Antonio de Faria , Peres Daniela Pereira Mendes , Peres Rafael
Published: June 2021

At this moment when we can employ software, mathematics education has to be reviewed. In this article, we point out that ODEs should be taught from a geometric and qualitative point of view together with an introduction to PDEs and vector fields.  This would increase the skills of the future mathematics user, not only to obtain explicit solutions from a straight command like DSolve, but also in the situations where this command does not help. The geometric interpretation and the concept of direction fields with images generated by software will give us a good understanding of possible system evolutions.
Antisystem-Approach (ASA) for Engineering of Wide Range of Dynamic Systems
Authors: Zacher Serge
Published: June 2021

Following the famous third physical Newton’s laws, “for every action there is an equal and opposite re-action”, a new approach for analysis and design of dynamic systems was introduced by [Zacher, 1997] and called «Antisystem-Approach» (ASA). According to this approach, a single isolated dynamic system does not exist alone. For every dynamic system, which transfers its inputs into outputs with an operator A in one direction, there is an equal system with the same operator A, which transfers other inputs into outputs in opposite direction. The antisystem does not have to be a physical system; it can also be a mathematical model of the original system. The most important feature of ASA is the exact balance between a system and its antisystem, which is called “energy” or “intensity”. In the group theory the system and antisystem are denote as antisymmetric. They build duality, which is common in many branches of sciences as mathematics, physics, biology etc. In the twenty years since first publication of the ASA there were developed different methods and applications, which enable to simplify the engineering, analysing the antisystem instead of original system. In the proposed paper is given the definition of ASA und are shown its features. It is described, how the ASA was used in electrical and chemical engineering, automation, informatics. Only several applications will be discussed, although ASA-solutions are common and could be used for wide range of dynamic systems.
Contexto histórico-político que sirve de escenario al conflicto interno en el proceso de la búsqueda por alcanzar la paz en Colombia
Authors: Fernández Celedón Fernando
Published: June 2021

La dinámica de conflictividad política y social en Colombia tiene antecedentes remotos que pudieran remontarse incluso al proceso de formación del estado republicano en la primera mitad del siglo XIX. En cualquier caso, se trata de un conflicto estructural que de una u otra forma envuelve históricamente a la sociedad colombiana en su conjunto y que posee causas múltiples en el orden de lo económico, político, social y cultural. Ya en el siglo XX, el conflicto colombiano que se expresa en una guerra fratricida se recrudece exponencialmente a raíz de acontecimientos como al asesinato del líder liberal Jorge Eliecer Gaitán en Bogotá en 1948. Desde una metodología de base documental, el objetivo de la investigación fue describir el contexto histórico-político que sirve de escenario al conflicto y la búsqueda por alcanzar la paz en Colombia, después de la transición democrática de 1991. En este esfuerzo especial énfasis adquiere el análisis del alcance y significación de los llamados acuerdos de la Habana del 2016. Todo permite concluir que la mejorar forma para gestionar el conflicto consiste en incrementar cualitativamente los espacios de participación democrática que permitan a la sociedad desarrollar una vida libre de violencia.
Creativity of the artists Мakharbek Tuganov and Azanbek Dzhanayev in the context of continuity in the national culture
Authors: Цориева И.Т.
Published: June 2021

В статье на примере творчества Махарбека Сафаровича Туганова
(1881–1952) и Азанбека Васильевича Джанаева (1919–1989) – одних из корифеев про-
фессионального изобразительного искусства Осетии – рассматривается тема пре-
емственности в национальной культуре. Автор прослеживает преемственную связь в
жизни и деятельности двух выдающихся осетинских художников и заключает, что их
творчество не только обогатило изобразительное искусство Осетии, но и расшири-
ло горизонты национального самосознания и народной памяти.

The article examines the theme of continuity in national culture on the example of the
creative work of Makharbek Safarovich Tuganov and Azanbek Vasilyevich Dzhanaev – one of
the founders of the professional fi ne arts of Ossetia. The author traces the continuity in the life
and activities of two outstanding Ossetian artists, and also concludes that their creative work not
only enriched the fi ne arts of Ossetia, but also expanded the horizons of national identity and
national memory.
THE EUROPEAN UNION INVESTMENT POLICY
Authors: Pandurević Nemanja
Published: June 2021

The Lisbon Treaty empowered competence of the EU in the area of FDI. One of the main reasons to have single investment policy by the EU is that the EU has the better negotiation position for the future agreements in the field of FDI. The paper analyzes the impact of the FDI to the EU economy, reasons for introducing the new EU investment policy, scope of the new EU investment competence.
Relação entre as alterações posturais ocasionadas pelo excesso de peso da mochila escolar e sua incidência no sistema locomotor de escolares do município de Guarabira-PB
Authors: Mendes Rui Ribeiro , Da Silva Fabio José Antonio
Published: June 2021

A saúde escolar tem sido objeto de atenção, devido às alterações posturais e dores lombares em crianças e adolescentes. As alterações posturais acompanhadas de dores podem ter várias causas. Segundo estudos relacionados às atividades nas escolas, ficar longo período na postura sentada, o transporte de mochilas escolares, bem como a carga transportada e o modelo das mochilas podem contribuir para o desenvolvimento das alterações posturais e dores musculoesqueléticas. Diante disso, o presente trabalho tem por objetivo relacionar o excesso de peso das mochilas com possíveis desvios posturais presentes em escolares do município de Guarabira/PB. A metodologia de pesquisa empregada será de campo, de caráter qualitativo, com aplicação de questionário a fim de atender o objetivo proposto nesta pesquisa. Concluiu-se que os estudantes transportam o tipo certo de mochila, mas carregam um peso maior que o recomendado, apresentando dores que podem atrapalhar em outras atividades e se não forem sanadas, podem permanecer por um bom tempo.
Tecnologías De Divulgación y Difusión Del Patrimonio Cultural y Natural Del Valle Del Mezquital, Hidalgo
Authors: Ojeda Cristy Elizabeth Aguilar , Guzmán Lorena Mendoza , Ruíz Jorge Luis Rodríguez
Published: June 2021

Algunos lugares culturales y naturales en el Valle del Mezquital, Hidalgo, son poco conocidos por parte de los habitantes de esta zona y de organismos gubernamentales; ello puede provocar la poca valoración y su conservación, sobre todo, una merma o tergiversación en las prácticas sociales y culturales que se realizan en torno a aquéllos. Por esta razón, se han desarrollado e implementado tecnologías que permiten la divulgación y difusión del patrimonio cultural y ambiental del Valle del Mezquital, con el objetivo de identificar, revalorar, reutilizar y promover este tipo de manifestaciones y/o lugares en la región, mediante la utilización de las Tecnologías de la Información (TI) que permiten la conformación de un repositorio web y a través de una aplicación móvil promoviendo su divulgación y difusión. Para lo cual se estructuró un marco teórico-referencial sobre herramientas de las TI y se consolidó un estado del arte sobre las mismas para tomar la decisión adecuada con respecto a las plataformas de desarrollo, usabilidad y viabilidad. Las TI han permitido que el conocimiento se difunda y divulgue a una mayor velocidad y con un mayor alcance, específicamente en términos de la divulgación del conocimiento científico, ya que se actualiza continuamente con información de investigadores, pero sobre todo de los mismos usuarios. Por tal motivo, la investigación está basada en una metodología inductiva que permite establecer las premisas del Centro de información del patrimonio cultural y natural a partir de cinco fases las cuales son: 1. Análisis y selección, 2. Investigación exploratoria, 3. Desarrollo interactivo de las herramientas del Centro de información, 4. Integración del Centro de información y 5. Finalmente la comprobación del mismo.
Proceso de difusión y factores de adopción de tecnologia en el sector forestal mexicano
Authors: Olguin Juan Quintanar
Published: June 2021

El concepto de difusión de tecnología, comprende el proceso de comunicación del uso de una nueva tecnología a lo largo del tiempo en un sistema social, por medio de ciertos canales. También se considera como difusión al proceso que abarca desde el momento del primer conocimiento de una innovación hasta su potencial adquisición y despliegue. La manera en que las innovaciones se difunden da lugar al estudio de los canales de comunicación, que constituyen un elemento central de la teoría de la difusión, distinguiéndose entre canales interpersonales y canales cosmopolitas. A partir de 2007, la CONAFOR ha realizado una serie de actividades orientadas a la difusión de la tecnología resultado principalmente de la investigación y desarrollo tecnológico, teniendo como canales de difusión los siguientes: Foros de divulgación y transferencia de tecnología, encuentros demostrativos entre productores receptores de paquetes tecnológicos, manuales de desarrollo y transferencia de tecnología publicados, paquetes tecnológicos. Además, en la etapa de difusión se debe realizar un diagnóstico de las expectativas, competencias, capacidades y necesidades de los beneficiados a atender, así como el tipo de solución y la frecuencia e intensidad de las actividades de difusión que éstos requieren. Por lo que su adopción se da bajo una situación de aprendizaje que depende de múltiples factores, como la percepción de utilidad, compatibilidad con el proceso, facilidad de uso, capacidad de demostración de los resultados y  alta visibilidad de impacto en los resultados del proceso.
Computational Model based Approach to Analyse Calcium (Ca2+) Channel in Ventricular Cells for Normal and Cardiac Arrhythmias Using Euler Integration Method – A Simulation Study
Authors: Babu Sarvepalli Sailesh , Gulothungan G.
Published: June 2021

Aim: In this paper, analysis of ventricular arrhythmias are made with respect to the Calcium (Ca2+) ion channel dysfunction (generating improper electrical activity). Many cases can make arrhythmias and most of them are related to generation or conduction of Action Potential (AP) in cardiac myocardium. Materials and method: Human ventricular cell based on the model of the human endocardial cell by Ten Tusscher (TT). The TT model data is modified based on the experimental data of Han, describing the properties of Ca2+ currents and its channel dynamics in human ventricular cells. Euler integration method is used to analyse the human ventricular model for different channel failure conditions in the same group of 50 samples. Results: Our research findings focus with respect to normal and deviant Ca2+ conductance (GCaL). The normal GCaL 0.000175nS and deviant GCaL increase like (10%=0.000218nS, 25%=0.000182nS, 50%=0.000262nS and 100%=0.000350nS) having the normal AP average value ranges between 26.0mV to -74.0mV and 12.0mV to -88.0mV for 10% GCaL, 18.0mV to -78.0mV for 25% GCaL, 18.0mV to -78.0mV for 50% GCaL and 21.0mV to -75.0mV for 100% GCaL deviants. Similarly, deviant GCaL decrease like (10%=0.000158nS, 25%=0.000131nS, 50%=0.000088nS and 100%=0.000001nS) having the deviant AP mean values ranges between 10.0mV to -90.0mV for 10% GCaL, 7.0mV to -92.0mV for 25% GCaL, -9.0mV to -96.0mV for 50% GCaL and -51.0mV to 100.0mV for 100% GCaL. Simultaneously its membrane Ca2+ currents are having significant variations. Conclusion: The results show clearly for the affirmation for Excitation and Coupling (EC) failures. EC failures lead to a systole phase that is more prolonged, that in turns to produce QT syndrome and hypertrophic cardiomyopathy.
Synthesis of New Fixings of Mobile Sands
Authors: Sharipova A.I. , Akhmadjоnov I.L. , Аbdikamalova A.B. , Akbarov Kh.I. , Kuldasheva Sh.A.
Published: June 2021

The issues of the synthesis of a water-soluble polymer preparation, which can find application in agriculture as a structure-forming agent of soils and mobile sands to prevent water, wind, mechanical erosion, increase fertility, moisture absorption, moisture retention, consolidation of soils, dumps, and mobile sands to eliminate negative effects on the environment. Maleic acid and acrylamide were chosen as monomers for the copolymerization reaction, and potassium persulfate was chosen as the initiator. As it turned out, an increase in the concentration of the initiator from 0.01 to 0.05% (by weight of monomers) promotes an increase in the rate of the polymerization process, maintaining its value for a longer time, reducing the time of this process from 7.0-6.5 to 5, 5-6 hours. In this case, the yield of the polymerization reaction increased exactly from 81.2 to 96.0% for the reaction with the ratio of starting materials 1: 5. When a small amount of alkali is introduced into the reaction mixture, high molecular weight polymers can be obtained. In this case, the yield of the process increases, and the reaction time is reduced by 2-3 hours. Analysis of the kinetics of fixing processes using synthesized and various other reagents, as well as changes in the plastic strength of sands, showed the dependence of the conditions of penetration of the fixer with the formation of a free flow in space under the influence of gravitational or capillary forces on the type of binding agent and on the composition of the sand itself.
Path Planning Optimization for Agricultural Spraying Robots Using Hybrid Dragonfly – Cuckoo Search Algorithm
Authors: Muthukumaran S. , Ganesan Manikandan , Dhanasekar J. , Loganathan Ganesh Babu
Published: June 2021

Finding collision-free paths and optimized path coverage over an agricultural landscape has been a critical research problem among scientists and researchers over the years. Key precision farming strategies such as seeding, spraying fertilizers, and harvesting require special path planning techniques for efficient operations and will directly influence reducing the running cost of the farm. The main objective of this research work is to generate an optimized sequential route in an agricultural landscape with the nominal distance. In this proposed work, a novel Hybrid Dragonfly – Cuckoo Search algorithm is proposed and implemented to generate the sequential route for achieving spraying applications in greenhouse environments. Here the agricultural routing problem is expressed as a Travelling Salesman Problem, and the simulations are performed to find the effectiveness of the proposed algorithm. The proposed algorithm has generated better results when compared with other computational techniques such as PSO in terms of both solution quality and computational efficiency.
Farmers’ Perception on Development Induced Farmland Expropriation in Ethiopia: A Review
Authors: Endris Emam Adem , Mansingh J. Paul , Nisha A. , Anbarasan P. , Makarla Ravikanth
Published: June 2021

Expropriation of farmland is one of the major options for many countries to meet the demands of emerging developments taking place in the urban-rural interface. This is commonly practiced without the consent of the farmers on a non-discriminatory basis in compliance with the law by compensation. In Ethiopia, the status of displaced farmers by expropriation of farmlands due to the expansion of towns and development projects, their perception on expropriation and compensation laws, participation in the valuation process and compensations are not clear and needs to be articulated. From this review, it is clear that none of the expropriate felt proud of the government's plan of farmland expropriation; but they supported the establishment of development-induced projects; and that they don't know about the laws and regulations of farmland expropriation and compensation in Ethiopia. Expropriates deeply felt bad that their farmland was expropriated without involving them in decision-making. Ten years annual income won't adequately compensate the loss of all the rights. Hence, open ventilation to understand the priority of the people and reviewing the prevailing expropriation and compensation laws will enable the government and to make a smooth environment for the project's undertaking. Farmers should have equal rights for participation within the expropriation process i.e. must be told, consulted, involved, and empowered to form such decisions.
Development of Real-time IoT based Air and Noise Monitoring System
Authors: Sundaram Dharmaraj , Nordin Ili Najaa Aimi Mohd , Khamis Nurulaqilla , Zulkarnain Noraishikin , Razif Muhammad Rusydi Muhammad , Abidin Amar Faiz Zainal
Published: June 2021

Modernization has brought the world technological advancements, but it has also brought with it a slew of problems. In today's Malaysia, air and noise pollution are becoming more of a concern, along with a rise in occupational disease. A monitoring system is needed to address these issues. This paper describes the development of a real-time IoT-based air and noise pollution monitoring system that can provide monitoring and alert the user to the pollution levels. This monitoring system was built using IoT technology, which included the use of an ESP8266 Wi-Fi Module NodeMCU as a microcontroller to communicate with the chosen IoT analytics platform, ThingSpeak. A gas sensor MQ9 was used to measure carbon monoxide concentrations, and a sound sensor LM393 was used to measure noise levels in the surrounding area. The measured values were displayed on the Arduino software's serial monitor, then sent to the ThingSpeak server and graphically displayed in real time on a screen. The results of the electronic sensors were compared to the results of the stand-alone carbon monoxide meter and digital sound level meter for validation. The proposed monitoring system produced promising results, with 91.12 % and 97.86 % accuracy for gas and sound levels shown by the gas sensor MQ9 and sound sensor LM393, respectively. The framework also provides ThingSpeak server warning messages. When the calculated conditions exceeded the user's defined cap, the server sent the user an email update with the gas and noise limit status. This has made the system more useful and convenient.
Comparative Analysis of Identifying Accuracy of Online Misinformation of Covid-19 Using SVM Algorithm with Decision Tree Classification
Authors: Pravallika N. , Rekha Dr.K. Sashi
Published: June 2021

Aim: To improve the accuracy percentage of predicting misinformation about COVID-19 using SVM algorithm. Materials and methods: Support Vector Machine (SVM) with sample size = 20 and Decision Tree classification with sample size = 20 was iterated at different times for predicting the accuracy percentage of misinformation about COVID19. The Novel Poly kernel function used in SVM maps the dataset into higher dimensional space which helps to improve accuracy percentage. Results and Discussion: SVM has significantly better accuracy (94.48%) compared to Decision Tree accuracy (93%). There was a statistical significance between SVM and the Decision Tree (p=0.000) (p<0.05 Independent Sample T-test). Conclusion: SVM with Novel Poly kernel helps in predicting with more accuracy the percentage of misinformation about COVID-19.
Improving the Efficiency of Heart Disease Prediction Using SVM and a Novel Tree Specific Random Forest Classifier (NTSRF)
Authors: Harish P. , Sabitha Dr.R.
Published: June 2021

Aim: The objective of the work is to evaluate the accuracy and precision in predicting the heart disease using Support Vector Machine (SVM) and Random Forest (RF) classification algorithms. Materials and Methods: Random Forest Classifier is applied on a Health dataset that consists of 304 records. A framework for heart disease prediction in the medical sector comparing Random Forest and SVM classifiers has been proposed and developed. The sample size was measured as 21 per group. The accuracy and the precision of the classifiers was evaluated and recorded. Results: The SVM classifier produces 53.04% in predicting the heart disease on the data set used whereas the Random forest classifier predicts the same at the rate of 83.2%. The significant value is 0.0. Hence RF is better than SVM. Conclusion: The performance of Random forest is better compared with SVM in terms of both precision and accuracy.
PROBLEMATIKA PEMBELAJARAN DARING DI MASA PANDEMI COVID-19
Authors: Haryadi Rudi , Selviani Fitria
Published: June 2021

The purpose of this research is to find out the problems of online learning during the Covid-19 pandemic. This research method uses literature study or library research by taking reading sources from secondary data collected through textbooks, scientific journals, e-books and other sources relevant to the research problem. This type of research was analyzed qualitatively with an interactive model consisting of data collection, data reduction, drawing conclusions and verification. The results of this study indicate that online learning is one solution so that the learning process continues during the Covid-19 pandemic. But in this learning there are various problems experienced by various parties, namely educational institutions, educators (teachers and lecturers), students and parents of students. The problems that exist in educational institutions are the lack of availability of telecommunication technology infrastructure, multimedia, information and platforms that support the process of teaching and learning activities online, from educators in the form of limitations in the use of IT, as well as the difficulty of forming student personality characteristics and applying learning media so that students can understand the material presented, from students, namely most students are not familiar with online learning and due to limited internet facilities, from parents the lack of time available to accompany their children during online learning because not all parents can divide their time between work and mentoring children in House.
PENTINGNYA PSIKOLOGI PENDIDIKAN BAGI GURU
Authors: Haryadi Rudi , Cludia Cindi
Published: June 2021

Educational psychology learning means studying the psychological aspects of students so that the teacher has basic rules for applying effective learning techniques that are applied to certain student characteristics. Learning skills also involve communicated strategies in learning, regardless of whether students understand them well or not. In the educational process, a teacher is expected to face challenges in evaluating the different characteristics of each student. In educational psychology, the teacher will understand the differences in student personalities in learning and how to deal with these personality differences, so that by studying good educational psychology, the teacher can know the differences in student character and not be confused in dealing with them. In educational psychology, there is a lot of discussion about problems related to human development. Therefore, teachers can not only teach thematic subjects in the classroom, but also provide direction or guidance to students who need academic problems. In addition to providing solutions for students who have academic problems, teachers can also build social bonds with students so as to create a positive atmosphere in learning activities.
E-LEARNING IN ISLAMIC EDUCATION AND PANCASILA ON DURING COVID-19 PANDEMIC
Authors: Elihami Elihami
Published: June 2021

In the middle of the global COVID-19 epidemic, it has an influence on several sectors, including education, to ensure that e-learning Islamic education and Pancasila on during Covid-19 pandemic continues in forming the character of the nation's youngsters. The government has a policy on distant education, however there are several impediments. Teachers can continue to teach using a mixed learning paradigm, and it is believed that character development will still be ingrained. The goal of this study was to investigate the efficacy of e-learning Islamic education and Pancasila on during Covid-19 pandemic in character development of students at SD Negeri 4 Bilokka, South Sulawesi. The research approach employed is qualitative analysis. According to the conclusions of data analysis, character building is still implanted with parental supervision and reporting to school in the form of an electronic Learning Management System (LMS) of e-learning Islamic education and Pancasila on during Covid-19 pandemic, which is then confirmed by the instructor. This demonstrates how vital parents' roles at home are. More study is needed to ensure that character education can be strengthened even with different methodologies
Multiple Imputation for Missing Values with an Empirical Application
Authors: Sotiropoulou Theodora , Giakoumatos Stefanos , Georgopoulos Antonios
Published: June 2021

Abstract

Missing data are the most common problem in many research areas. For cross-section and time-series data, imputation can be a challenging problem. The most
widely used method for filling missing observations is the multiple imputation
which increase the number of the available data and thereby reducing biases that
may occur when observations with missing values are simply deleted. The main
purpose of this paper is to employ a bootstrapping expectation–maximization (EM)
algorithm in order to impute missing values mainly to economic data. In the
application we use a dataset that is consisted by annual panel data for the 27
countries of the European Union covering the period 2000-2017. The data were
obtained from the databases of World Bank and Eurostat namely the Global
Financial Development Database, The Standardized World Income Inequality
Database by Solt (2019) and the World Development Indicators. Different
indicators were chosen representing the development of banking system and stock
markets, economic growth, economic inequality, innovation, fiscal policy, physical
and human capital, and trade openness. Finally, diagnostic tools are used inspecting
the imputations that are created.

Keywords: Multiple imputation, Amelia II, Economic data, Financial development,
Inequality.
THE WORLD OF CHARECTERS IN VIETNAMESE MEDIEVAL CHUANQI GENRE
Authors: Do Thi My Phuong
Published: June 2021

Characters in Vietnamese medieval Chuanqi genre are rich and diverse, with a full range of components, class, caste, gender, habits, and dignity. Based on the reality-fantasy relationship, the world of chuanqi characters can be divided into two main groups: fantasy characters and earthly characters (people in the real life). They represent two realms: of unreality and of reality. Fantasy character is a surreal character with mystical capacity and strange traits. From the rational perspective, this type of character absolutely does not exist in real life. By contrast, earthly character are people who exist in daily life with ideals, ambitions, happiness and suffering. The presence of two types of characters clearly demonstrates the realistic portrait in the status of the unreal and real invasions, which deeply consists of their own imprints in the Chuanqi genre. From the world of characters in Vietnamese medieval Chuanqi genre, the evolution of this genre is also revealed.
Intrusion Detection System using Deep Neural Networks and Principal Component Analysis﻿
Authors: Al-Azzani Abdoulwase M. Obaid , Afif﻿ Ali Mohammed
Published: June 2021

The amount of data on the internet is growing daily, because of using the smart phones, social network, and IoT. This growing had impact on data security. Therefore security become the biggest challenge for researchers and developers, moreover, most of security tools (firewall, IDS, IPS, etc.) have limitations to detect all threats. Deep Learning is one of Machine Learning approach, it is an efficient artifice that can be applied to intrusion detection, to ascertain a new outline from the massive network data, as well as it used to reduce the strain of the manual compilations of the normal and abnormal behaviour patterns. In this paper we build a model for detect threats based on Principal Component Analysis (PCA) for reduction dimensions of dataset, and deep neural network for the classification. We used KDD99 dataset and 10_ percentage of KDD99 dataset to train and test the model in Spark environment. In experiment DNN of layers ranging from 1 to 3 with 300 number of epotch. The results were compared and concluded that a DNN of 1 layer has superior performance with 0.929 as accuracy.
Review: Solid Dispersion of Fenofibrate Using Poly Ethylene Glycol 6000
Authors: Helsinta Nelvia , Halim Auzal , Octavia Maria Dona , Rivai Harrizul
Published: June 2021

This review aimed to find information about the solubility of the fenofibrate solid dispersion system using PEG 6000. Fenofibrate is an antihyperlipidemic drug that belongs to the Biopharmaceutical Classification System Class II (BCS II) with low solubility. To find information was by conducting a literature search in national and international journals in the last ten years (2010-2020) through websites, namely Google Scholar, Science Direct, NCBI, ResearchGate, and other trusted journals. Several keywords were used as follows: fenofibrate, solid dispersion, PEG 6000, and dissolution rate. The results of several research journals showed that the solid dispersion of fenofibrate using PEG 6000 made by various methods causes a reduction in particle size to increase the solubility and dissolution rate of fenofibrate. The solid dispersions system was made using several methods, namely fusion (melting), solvent evaporation, dropping, and co-grinding, which is a technique used to increase the solubility of a drug. PEG 6000 was chosen as the carrier because it has high hydrophilicity, is non-toxic, inert, economical, has a low melting point, and is dense at melting temperature to withstand crystallization. Thus it can be concluded that the manufacture of solid dispersion of fenofibrate using PEG 6000 and several methods showed the same results, namely an increase in solubility and dissolution rate.
Compassion and Virtue: Social media-enabled bartering in Fiji during COVID-19
Authors: Finau Glenn , Titifanue Jason , Kant Romitesh , Vunibola Suliasi , Presterudstuen Geir Henning , Horst Heather
Published: June 2021

This essay explores the emergence of the BFBF and how this online group made ‘bartering’ and other practices of exchange central to surviving Covid-19. We analyse the posts and discussions of BFBF participants in 2020. We are interested in the way moderators and participants position this contemporary way of conducting bartering as an alternative to market trade that has deep cultural roots in Fiji. Such forms of exchange have serious implications for the study of digital practices and relational systems of exchange in Fiji and beyond.
What are the Aspects of Adopting Computer-Based Exams and do they Impact Negatively on Students?
Authors: Emdas Rabea , Alruwaili Ahmed
Published: June 2021

Computer-based exams (CBEs) have been used in various courses, such as schools, universities and other training centres. As there are many educational institutions which have chosen to convert from paper test system to computer- based exam. However, adopting computer tests may lead to some difficulties for the students, which relates to technical defects and lake of computer skills of some students when they applying the computer based exams. The purpose of the essay was to determine negative and positive effects on the students of using computer-based exams and focus on some of suggesting solutions to the negative effects, such the exams to make continuous use of computer- based possible. In the first section the computer test, which could cause negative effects on students due to various levels of skills to use computer and some technical problems was examined. The design of the computer examination system requires careful planning and study from several aspects before becoming officially accepted, the computer-based exams still have a few problems which may lead to difficulties in using computer exams. Then the many benefits which could be gained by using computer-based exams, such as the student will be more independent with computer test were described. In addition, the students have accessible to the exams through the internet network. Finally, the effectiveness of certain strategy to solve the negative effects of computer-based exams were argued. developing the solutions of the technical problems are required for computer test, where improving the input methods questions and corrections. It was concluded that the computer exam, with adjustments, is more suitable for students.