bluuebunny/crossref_metadata_2025 huggingface dataset:
Problems of Social Vulnerability of Internally Displaced Persons and Forced Migrants
Authors:   NAS of Ukraine Mykhailo Ptukha Institute of Demography and Social Studies, Novak Iryna
Published: December 2022

The article is dedicated to the analysis of the problems of social vulnerability of internally displaced persons (IDPs) and forced migrants. Basing on data from the United Nations Organization, the International Organization for Migration, the International Labour Organization and data from sociological surveys of IDPs and forced migrants, the dynamic changes in the number of these population groups, their main socio-demographic characteristics, problems and risks of social rejection, intentions to return to their places of permanent residence and integration potential in the new place of stay have been studied. It is concluded that there is the high level of multifactorial social vulnerability of IDPs and forced migrants, most of whom are women with children, the elderly, the disabled, and orphans. Because of the destruction of social, economic, and cultural ties, IDPs and forced migrants have increased risks of social rejection from the political, economic life and social surroundings, the sphere of culture and education, the services of the health care system and social protection. There are reasons for the formation of significant manifestations of rejection among IDPs, in particular in terms of access to structural and economic resources to ensure basic social and economic human rights, and positions that provide an opportunity to gain access to such resources. Assessments of the integration of IDPs by the communities that receive them may indicate the presence of certain barriers to the integration of IDPs in their new place of residence. It is shown that the loss of human potential is the most negative consequence of large-scale forced migration and internal displacement of the population for the territorial communities of Ukraine. At the same time, for communities hosting IDPs, population growth can become a driver of local development.
Changes in the Pattern of Use of the Emergency Departments in an Spanish Oversaturated Tertiary Hospital Complex During COVID-19 Pandemic
Authors: Lacorzana J. , Gonzalez-Andrades M. , Ortiz-Perez S.
Published: December 2022

Background and objectives: To analyze the effects of COVID-19 in the pattern of use (number of admissions, hospitalizations, hospitalization ratio, and classification by priorities) of Emergency Departments (EDs) of one tertiary referral hospital.
Methods: Retrospective, observational and single-center study, carried on in the EDs of Virgen de las Nieves Hospital Complex (Granada, Spain). The information was collected from the three hospitals which belong to the Virgen de las Nieves Hospital complex (i.e. the General Hospital, GH; the Children’s Hospital, CH; and the Neuro-Trauma Hospital, NTH) from February 1st to July 31st, 2019, and 2020.
Results: In the period under analysis, there were 71236 admissions compared with 118382 in the same period in 2019, which means an overall reduction of 38.83%. Considering the hospitalizations, there were 6841 compared with 7648 (2020 and 2019, respectively) which gives an overall reduction of 10.55%. The distribution of the priorities did not show a defined pattern; while CH and NTH’s EDs showed clear changes in their distribution, no notable changes were observed in GH’s ED.
Conclusion: The Covid-19 Pandemic changed dramatically the pattern of ED referral in our tertiary referral hospital. A noticeable reduction of admissions and hospitalizations were reported, together with a pronounced increase in the hospitalization ratio that in some cases reached almost 50%. This could be explaining for many reasons, such as the fear of contagion and the lockdown that presumably caused a decrease in the less-severe cases attended. Possibly, the effects of COVID-19 may have been indirectly influenced by the health care system of each country. The COVID-19 pandemic constitutes one of the greatest challenges in modern medicine, understanding better these changes and the impact that COVID-19 has caused on pattern of use of EDs will probably lead us to manage and use better our public health systems in the future.
Dexamethasone in outpatients with SARS-CoV-2 infection
Authors: Martínez-Zaldívar Moreno M. , Aguilera Maestre E. , Espinosa Barta P. , Navarro Ortiz N. , Callejas Rubio J.L.
Published: December 2022

Objective: To evaluate the clinical evolution of outpatients with SARS Cov-2 infection, who received dexamethasone in our Health Center.
Methods: The medical records of the patients who were prescribed dexamethasone treatment from Primary Care, in the acute phase of the SARS-CoV-2 infection, were reviewed, without initial criteria of severity. We describe the clinical-demographic characteristics and the radiological and analytical data of the cytokine storm, as well as its final evolution.
Results: a total of 9 patients were included, 6 women and 3 men with a mean age of 56.6 (34-74) years. The reason for consultation was fever in all cases, with a mean time of 4 (2-7) days from onset of symptoms to consultation. All patients presented a relationship between oxygen saturation and inspired oxygen fraction greater than 450. Out of these, 5 patients presented radiological findings compatible with COVID and no infiltrates were observed in 4. No patient had laboratory data for cytokine storm syndrome. The recommended dexamethasone dose was 6 mg/d for 7 days. In 3 cases, hospital admission was required, 2 on the third day and one on the fourth day after the start of dexamethasone. These patients resolved the in-hospital process with pulses of corticosteroids and antibiotics, without the need for high-flow oxygen therapy or mechanical ventilation.
Conclusions: the use of dexamethasone in patients with SARS-CoV-2 infection without hospital admission criteria does not seem to prevent the risk of progression to more serious forms. In the absence of more data, the use of dexamethasone in these cases does not seem advisable, unless it is required for other reasons.
The right to health in Spain. Special reference to the management of COVID-19
Authors: Torró Barrios S. , Cernada Badía R.
Published: December 2022

This study has been carried out with the purpose of analyzing the right to health in Spain focused on times of COVID-19, that is, analyzing how it has been affected by the health crisis and how it has had to adapt to be able to face it and study the union that exists between law and health, the management of COVID-19 that has been carried out in our country and the possible mistakes that may have arisen from it. After the study carried out with scientific resources, it has been verified that despite having in our legal system regulations for situations of pandemics and situations of urgent and extraordinary need, the regulations have not been sufficient and new regulations have had to be approved in order to mitigate the effects of this virus through the creation of royal decree-laws that would allow a fast response to the situations that were created by this situation. In addition, it can be affirmed that law and health are closely linked despite the fact that the right to health is not recognized as a fundamental right I our Spanish constitution. Finally, mention that COVID-19 has been an event that has overwhelmed the entire world and that all the governments of the world have tried to stop the contagion within their borders, but nevertheless, since it is an unknown and unprecedented virus, in the countries, managing it has been complicated and, focusing on Spain, the government has tried to deal with it in the best possible way, but in the face of such a situation with such heartbreaking and worrying data and with such a rapid response from the leaders, they have committed errors during management that should be taken into account for future pandemics.
Numerical modelling of slope stabilization with xathan gum-treated soil
Authors: Tran Thi Phuong An , Ilhan Chang , Tran Thanh Nhan , Gye-Chun Cho
Published: December 2022

Biopolymer soil treatment has been introduced as the latest technological innovation in soil stabilization and improvement. Biopolymers with agar, guar, xanthan, casein, gellan and sodium alginate have been commonly studied to improve strength, reduce hydraulic conductivity and prevent erosion of highly permeable soil materials. Among those, xanthan gum is introduced to perform better in terms of lowering permeability. In this study, the effect of xanthan gum on slope stability under rainfall was evaluated via a 2D finite-difference program (FLAC) considering the wetting behavior of xanthan gum-treated soil. In order to obtain input parameters for numerical modelling, wetting soil-water characteristic tests, permeability tests, and direct shear tests were conducted on xanthan gum-treated soils. The numerical results support the application of biopolymers to soil erosion control during rainfall, mainly due to the significant decrease in the infiltration of xanthan gum-treated soil.
Border Carbon Adjustment: Implications for Russian Companies and Regions in the Context of the Russia Sanctions (the case of Magnitogorsk Iron and Steel Works and Chelyabinsk region)
Authors:   Ural Federal University, Ekaterinburg, Russian Federation, Belik Irina S. , Starodubets Natalya V. ,   Ural Federal University, Ekaterinburg, Russian Federation, Yachmeneva Alena I. ,   PJSC Rostelecom, Ekaterinburg, Russian Federation, Prokopov Konstantin A. ,   Ural Federal University, Ekaterinburg, Russian Federation
Published: December 2022

Relevance. There are at least two serious challenges that Russian exporting companies are now facing: first, in 2021, the EU introduced the carbon border adjustment mechanism (CBAM), which will come into force in 2026, and, second, since February 2022, many exporters have been subject to the EU sanctions as part of the Russia sanctions regime. There is much uncertainty surrounding the duration of the current sanctions episode as well as the introduction of the carbon tax in the Middle Eastern and Asian countries. Research objective. The study aims to assess potential economic losses resulting from the CBAM introduction and the pressure of sanctions on the Russian exporters of metallurgical products and their home regions. The study focuses on the case of Magnitogorsk Iron and Steel Works (MMK) and Chelyabinsk region. Data and methods. Methodologically, the study relies on scenario analysis. Two scenarios are considered: the EU sanctions against Russian steel companies will be lifted after 2024–2025 and the sanctions will not be lifted in the near future. For each scenario, two variations are analyzed and the annual economic losses are calculated both for MMK and for Chelyabinsk region. The data for the study was taken from ММК official reports. Results. If the EU sanctions are lifted in the nearest future, at the initial stages of the carbon tax introduction, the economic consequences for Russian exporters will be insignificant. In the future, however, carbon regulation can create serious threats to the financial condition of such enterprises even if exports account for a small share of their revenue. If the EU sanctions stay in place, Russian enterprises are likely to search for trade partners in the Middle East and Asia. If the latter introduce a carbon tax, Russian companies can enjoy a competitive edge due to the comparatively low carbon intensity. Conclusions. To ensure Russian steel companies’ competitive edge, it is necessary to stimulate them to reduce their carbon footprint and create a national carbon regulation system. Not only will this measure help to reduce the loss of export income and regional governments’ tax revenues but it will also enable companies to stay competitive and deal more effectively with the sanctions pressure.
trabajador de tiempo parcial y su protección en el marco jurídico colombiano
Authors: Cortina Candanoza Lizeth , Díaz Velandia Carlos , Mendoza Torres Gabriel Andrés
Published: December 2022

Jornada laboral inferior a treinta días, afiliación al régimen de salud y salario inferior al salario mínimo mensual legal vigente son las características de un trabajador de tiempo parcial. Esta figura ha tomado gran relevancia en el ámbito laboral actual en Colombia, razón por la cual la presente investigación determina el desarrollo jurídico frente a ella. Se describe el avance legislativo y se identifican los pronunciamientos en la jurisprudencia colombiana por medio de un análisis jurídico. Se utiliza una metodología de tipo exploratorio, cuyo propósito es destacar aspectos fundamentales del tema y utilizar un modelo cualitativo-descriptivo.
Relieving Burnout through Job Design: A SEM Approach
Authors: Anjali Jindal Anjalijindal , Shivani Agarwal
Published: December 2022

Problem: This paper proposes essentiality of the well-defined job design in such a manner, that the burnout must be reduced and further the employees’ performance can be enhanced. It will in turn help the organization effectively compete in the ever-challenging global market.

 

Objective:  Investigating the relation between job design and burnout in employees (managers) in FMCG companies. It’s done by assessment of changes in core dimensions of burnout with respect to Job Design.

Design/Methodology/Approach: The assessment was done among 350 managers working in FMCG companies in Delhi/NCR. They had been given questionnaires to make assessment of the dimensions of different variables related to burnout. The hypothesis was made that job design and burnout have a negative correlation. Path analysis method was used to generate the model and got tested for job design and burnout. For the analysis of the obtained model SEM software AMOS 20.0 version was used.

Conclusion: Sub hypotheses were formed by transforming the hypothesis. The hypotheses were validated by the results obtained from the analysis. It also substantiated that job design and burnout are negatively correlated significantly.

Originality: The main aspect of this research was to examine the connection amongst these two variables i.e. job design and burnout. The resolve of this research is to examine the significant effect of job design in the alleviation of burnout. The major outcomes of the present research divulge that there is a negative and noteworthy association among job design and burnout.

Restrictions: The correlation has only been validated amongst a limited setup of FMCG managers which gives a conceptual base. It can further be extended to other sectors of public and private companies and to other job roles and services. Various measures of management of employees can further be identified on the basis of this research finding to alleviate burnout.
THE PARADOX OF CRIME PERCEPTIONS: SAPS crime statistics, Victims of Crime Surveys and the media
Authors: Govender Megan
Published: December 2022

A disjuncture exists between perceptions of crime and the actual levels of recorded crime. The 2012/13 crime statistics released by the South African Police Service reveal an overall decrease in serious crime between 2002/03 and 2012/13. Yet, during this period, suspicions lingered among the public and media that crime was actually increasing. This article investigates the reporting of crime and demonstrates that household perceptions of property crime and violent crime can be interpreted and reported in contradictory ways. It can be variously shown that most households feel that crime has not decreased, nor do they feel it has increased and nor do they feel it has stayed the same.  Consequently, the reporting of the perceptions of crime needs to be carefully and explicitly communicated to mitigate any confusion that may ensue.
Self-reported substance use, in dental and oral hygiene students at a university in South Africa
Authors: Madiba Thomas K , Mostert Vanessa , Sykes Leanne
Published: December 2022

A recent study amongst South African dental students found that a number of them had perceived moderate to severe stress and as a result, some have resorted to stimulant drugs. The aim of the study was to assess substance use by dental and oral hygiene students at a university in South Africa. A cross-sectional design was used and all dental and oral hygiene students registered in 2019 at a university in South Africa were asked to participate. Materials and Methods A pretested, validated self-administered questionnaire was used to achieve the aim. The objectives were to identify which substances were used, where they were obtained, frequency and reasons for use, as well as the self-perceived benefits and side effects experienced. Data was analysed using SPSS version 27. The data was confidential and anonymity was ensured. A total of 303 (88%) agreed to participate with ages from 17 to 36 years and a mean of 22.3 years. Over two thirds 206 (67.9%) used substances. Almost half of the group (44.6%) took one product, 16.5% took two, and 7% consumed between 3 and 5. The sources of substances ranged from peers, friends, acquaintances and pharmacies. Nearly twenty percent of the students used caffeine products, energy drinks, and methylphenidate. Almost 10% used anti-anxiety pills and anti-depressants whilst just above 11% used natural boosters and multivitamins. More than half of the students used the substances to stay awake and improve marks and 45(22%) of the users struggled to stop. Conclusions Over two thirds of students used substances, with almost half using one substance. There were multiple sources of substances. More than half of the students used them to stay awake and improve marks.
An epidemiological analysis of patients diagnosed with periodontitis at a tertiary institution
Authors: Ahmed Mai , Kimmie-Dhansay Faheema , Jeftha Anthea
Published: December 2022

An analysis of the epidemiological factors associated with the diagnosis of periodontitis is important baseline evidence for the study of this disease within our population. This evidence will be valuable baselineinformation to inform intervention protocols that are contextual to our society. There is a scarcity of studieson periodontitis in South Africans. To describe the epidemiological and clinical characteristics of periodontitis patients diagnosedbetween 2014-2019 at a tertiary institution in SA. A retrospective records-based study wasconducted. Data from 450 patients diagnosed with periodontitis were extracted. Data sets including age, sex, smoking, presence of diabetes, and other systemic diseaseswere analysed. Periodontal parameters such as plaquescore, plaque index, gingival bleeding score, gingivalindex, number of missing teeth, probing depths, andclinical attachment loss were included for analysis. Males had higher bleeding index (p=0.035), deeperpockets (p=0.003), and more attachment loss(p<0.001), compared to females. Deeper periodontalpockets were observed in patients with systemicdiseases (p=0.018). Smokers had a lower bleeding percentage (p=0.039). There was a higher plaque percentage (p=0.031), and bleeding index (p=0.043),deeper pockets (p<0.001) and more attachment loss(p<0.001) in patients with diabetes mellitus. Worse periodontal status was observed in males,and patients with diabetes or other general diseases.Additional research is required to elucidate the role ofsex and systemic conditions as predisposing factors to periodontitis
Comportamiento ético profesional y autoeficacia de las entrenadoras
Authors: Keskin Burçak
Published: December 2022

Este estudio tuvo como objetivo examinar la relación entre la autoeficacia de las entrenadoras y el comportamiento ético profesional y compararlos según los años de experiencia como entrenadoras, la edad y la rama. La muestra de 202 mujeres entrenadoras voluntarias que participaron en jornadas de formación realizadas en 2021-2022. La edad media de los participantes fue de 33,82±8,831 años. Se administró a los participantes la 'Escala de comportamiento ético profesional de entrenadores' y la 'Escala de autoeficacia de entrenadores'. De acuerdo con los resultados de la prueba de Shapiro-Wilk y los valores de asimetría y curtosis, la muestra tenía una distribución normal. Los datos se analizaron mediante estadística descriptiva, medias, desviación estándar, medianas, cuartiles y porcentajes. Los hallazgos sugirieron una relación altamente positiva y significativa entre la autoeficacia de los entrenadores y sus comportamientos de ética profesional, y obtuvieron puntajes promedio altos en las escalas de autoeficacia y comportamientos de ética profesional.
Efectividad de la educación a distancia en instituciones de educación superior bajo la ley marcial
Authors: Ishchenko Yevhenii , Vdovenko Оlena , Nych Tetiana , Moroz-Rekotova Lesia , Arystova Liudmyla
Published: December 2022

El presente estudio tuvo como objetivo evaluar la efectividad del aprendizaje a distancia en instituciones de educación superior (IES) bajo la ley marcial. Se analizó el desempeño de los estudiantes y los cuestionarios a fin de determinar la efectividad del aprendizaje a distancia. La encuesta incluyó una evaluación de la satisfacción de los estudiantes con el entorno educativo y la organización del aprendizaje, su motivación para estudiar y la socialización. Se encontró que el rendimiento académico de los estudiantes bajo la ley marcial cambió: el número de alumnos con Nivel A disminuyó, mientras que el número de estudiantes con Nivel C aumentó. Se estableció que solo el 30% de los estudiantes tenían una fuerte motivación por estudiar. El estudio tambien mostró que los estudiantes tenían un clima insuficiente para la comunicación interpersonal durante el aprendizaje a distancia, carecían de retroalimentación establecida por parte del maestro; y ante esto se hizo necesario utilizar la retroalimentación con la oportunidad de que los estudiantes se expresen, para comparar sus expectativas de la materia académica con lo que ofrecen los docentes para aumentar la efectividad de la educación a distancia. Se concluyó que la socialización se vio afectada durante el aprendizaje a distancia.
LC3-lipidation-assay v1
Authors: Jensen Liv
Published: December 2022

Protocol for an in vitro LC3 lipidation assay using purified proteins and synthetic liposomes.
Methodology to Define the Origin of SARS-CoV-2 v1
Authors: Maison David
Published: December 2022

Using the CDC-classified SARS-CoV-2 VOC (B.1.1.7, B.1.351, B.1.427, B.1.429, and P.1), identified in Hawai’i as an example, we demonstrate a method to define the origin of SARS-CoV-2 lineages and VOC. This method works using either open-source or licensed software with either a personal computer or a supercomputer.
Two Approaches to Modeling Phytoplankton Biomass Dynamics Based on the Droop Model
Authors: Abakumov A.I. , Pak S.Ya.
Published: December 2022

This work continues the study of the Droop model based on the concept of cell quota. Description of the photosynthetic processes in phytoplankton includes in the model structure. The concept of chlorophyll quota is used. It is the proportion of photosynthetic substances in plant cells. In addition to the chlorophyll quota, the photosynthetic activity of phytoplankton is determined by external conditions, primarily by the level of photosynthetically active radiation (PAR). The model is based on separating the dependence of phytoplankton reproduction on external conditions according to the stages of photosynthesis. The light stage is largely determined by the PAR, and the dark stage is limited by the nutrient resource under the controlling influence of the temperature of the aquatic environment. In order to develop the model, the storage of energy in the light stage of photosynthesis is described in detail. Energy is stored in the form of energy-intensive substances in macroergic molecules (macroergs). The most common cell macroerg is adenosine triphosphate (ATP). The proportion of ATP in phytoplankton varies depending on the light regime and on the energy amount stored in the dark stage. The model includes the Droop kinetics and equations for the dynamics of the chlorophyll quota and the ATP pool. The conditions for the existence and stability of equilibrium solutions are compared for the same values of parameters common to both models. The greatest influence on the dynamic modes of the minimum value of the cell quota has been established. The proportion of biomass associated with the light period of photosynthesis is also significant. For the first model that is the biomass produced during daylight hours. And in terms of the second model, it is the biomass formed due to the energy of ATP stored in the light phase. The influence of the structure of dynamic models on the daily and annual dynamics of phytoplankton was revealed. Scenarios of behavior of models under various lighting conditions, including constant and periodically changing lighting, have been studied.
Essential Elements for Radio Frequency Identification (RFID) adoption for Industry 4.0 Smart Manufacturing in Context of Technology-Organization-Environment (TOE) Framework – A Review
Authors:   Department of Mechanical Engineering, Faculty of Engineering & Technology, The University of Lahore, Lahore, Pakistan., Rafique Muhammad Zeeshan , Haider Mustafa ,   Department of Mechanical Engineering, Faculty of Engineering & Technology, The University of Lahore, Lahore, Pakistan, Raheem Abdul ,   Department of Mechanical Engineering, Faculty of Engineering & Technology, The University of Lahore, Lahore, Pakistan., Ab Rahman Mohd Nizam ,   Department of Mechanical and Manufacturing Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia,  43600 UKM Bangi, Selangor, Malaysia, Amjad Muhammad Saad ,   Department of Mechanical Engineering, Faculty of Engineering & Technology, The University of Lahore, Lahore, Pakistan
Published: December 2022

Automatic identification and data collection provides an ideal basis for Industry 4.0 Smart Manufacturing. The manufacturing sectors, involving a wide spectrum of physical and digital world, are functioning in extremely challenging environment. To optimize production efficiency, the incorporation of automated data collection technologies such as Bar Code and Radio Frequency Identification (RFID) is essential. Both these technologies have a great overlap in terms of industrial applications and no study reviews the existing literature in this regard. Therefore to cope up this matter, a systematic literature review has been conducted in which the technologies have been studied and compared, followed by the detailed discussion under various contexts of Technology-Organization-Environment (TOE) Framework. It has been observed that both these technologies have been employed in various manufacturing domains such as lean manufacturing, inventory management and production planning. However, it has been observed that RFID technology carried technological superiority over Bar Code technology. The systems utilizing the former are highly reliable, exquisitely capable and perform excellent in case of automation. However, issues such as high capital costs and increased level of technical complexity are few dilemmas in case of adopting RFID based systems. In addition to that, the implementation of RFID systems is complemented by certain essential features of TOE framework, which can help to elevate competitiveness and efficiency of an organization regarding tracking and identification of assets and inventory.
Comparative Study of Seismic Design for Different Bridges Structures
Authors:   Faculty of Building and Construction Engineering Techniques Department, Al-Mussaib Technical College, Al-Furat Al-Awsat Technical University, Iraq, Naser Ali Fadhil
Published: December 2022

The main objective of this study is to compare the structural members capacity between different types of bridges structures under seismic load. The results of seismic modal analysis showed that the models of box girder bridge, precast T girder bridge, and U steel girder bridge had the higher values of natural frequency comparing with others bridges structures under seismic load. Pushover analysis in transvers direction showed that bent No. 2 of bridges structures which was located in the middle of bridges superstructure was displaced in transvers direction more than bent No. 1 and bent No. 3. In longitudinal direction, Precast I girder bridge had higher value of longitudinal displacement comparing with others bridges structures, and it was more than the maximum value of transvers displacement. The results of demand and capacity ratio showed that bent No. 2 was the critical structural member which had values of demand/capacity ratio more than 1.0 or near from it especially precast I girder bridge, precast T girder bridge, and U steel bridge, indicating that these types of bridges will be subjected to failure in bent No. 2. Therefore, there was needing to redesign the bents of these types of bridges by increasing the numbers of piers, using high strength materials in construction of bents, and increasing of dimensions of piers and pier caps. The results of internal forces showed that bent No. 2 was subjected to the maximum values of axial force, horizontal shear, and bending moment for all types of bridges structures. Also, it can be seen that the models of precast I girder bridge, precast T girder bridge, and U steel bridge had the higher values of forces comparing to others models, indicating that these results agree with results of demand/capacity ratio and pushover analysis method.
An Investigation into the Effect of Backup Coat Sands on Investment Casting Products
Authors:   Metallurgy Engineering, Government Polytechnic, Rajkot-360003, Gujarat, Affiliated with Gujarat Technological University, Ahmedabad, Gujarat, India, N Kaila Vishal , B. Dave Indravadan ,   Metallurgy Engineering Department, Government Engineering College, Gandhinagar-382028, Gujarat, India
Published: December 2022

Investment casting is a well-known method for producing precise and finished products. The shell-making process takes a long time and consumes a large amount of coating sands. On the wax pattern tree, the ceramic coating sands are used as a primary coat and several backup coats. Zirconia sand is used for primary coating on a shell in this work. Backup coat sands are made up of fused silica and alumina silica. Colloidal silica is used as a binding material in the formation of all shells. In the work, the effect of fused silica and alumina-silica sand as a backup coat on casting properties was determined. The experimental work evaluated casing properties such as microstructures, grain size measurement, gas porosity, and shrinkages. On the dried, de-waxed, and fired shell, the porosity of the shell mold was determined for the permeability level. Alumina-silica sand has a porosity of 27 to 31 percent, whereas fused silica has a porosity of 22 to 25 percent. It produces better casting properties in alumina–silica casting products than fused silica. Casting grain sizes range from 22 to 38 microns. The grain size of alumina-silica casting is finer than that of fused silica shell casting. Gas porosity and shrinkage in the casting were found to be moderate in all castings.
The Effect of Sand Grain Size and Water on The Green Compression Strength for Greensand Casting Mould Mixture
Authors:   Department of Mechanical Engineering, Politeknik Ungku Omar, Perak, Malaysia, Azhar A. , Hazril H.H. ,   Department of Mechanical Engineering, Politeknik Ungku Omar, Perak, Malaysia, Redzuan M. ,   Department of Mechanical Engineering, Politeknik Ungku Omar, Perak, Malaysia
Published: December 2022

The focus of this research is to investigate the effect of water content and sand grain size on the green compression strength of a greensand casting mould mixture. Grain size is a major determinant of mould and core green compression strength and surface finish of the greensand casting product. Water influences the efficiency of binder which is bentonite clay in bonding the sand grain particles thus improving the green compression strength. The objective of this study is to study the effect of grain size and water on the green compression strength. The specimen is prepared by mechanical size grading and graded into three sizes which are 425 μm, 300 μm and 150 μm. Experiments are carried out in accordance with American Foundrymen Society (AFS) guidelines. Three ramming blows of 6666 grammes with a Ridsdale-Dietert metric standard rammer compact cylindrical test pieces with dimensions of Ø50 mm×50 mm in height made from varied sand grain size–water ratios bound with 5% bentonite. The test pieces are tested for green compression strength with Ridsdale-Dietert Universal Sand Strength Machine. The sand grain size of 150 μm is found to have superiority in green compression strength compared to two other sizes, and 3% water content gives the maximum green compression strength for all three sand samples sizes.
Phylogenetic Relationships and Morphological Variation of Gymnures (Galericidae: Hylomys) from Genting Highlands, Pahang, Malaysia
Authors: Abd Wahab Muhammad Farhan , Motokawa Masaharu , Anwarali Khan Faisal Ali , Pathmanathan Dharini , Omar Hasmahzaiti
Published: December 2022

Gymnures from the genus Hylomys are widely distributed across Sundaland and the Indochinese region. However, the relationships among its members in Peninsular Malaysia especially from Genting Highlands are still lacking. This study aims to examine the morphology and genetically analyse of the Hylomys specimens collected from the new isolated population of Genting Highlands, Pahang, Malaysia. Morphometric analyses showed that morphological variation exists among the Hylomys lineage. The external morphology and the skull measurements of the taxa studied coincide with those of Hylomys maxi from Peninsular Malaysia and Sumatra based on descriptive statistics and principal component analysis (PCA). The differences within the Hylomys taxa are also evident in the phylogenetic tree and K2P genetic distances analyses inferred from cyt b. Hylomys samples from Genting Highlands formed a clade with H. maxi from Cameron Highlands and Fraser’s Hill, Peninsular Malaysia and Sumatra. However, they were separated from Hylomys parvus(Sumatra), Hylomys suillus (Java) and Hylomys dorsalis (Borneo). Relatively, low genetic distances were detected among the studied taxa with other H. maxi (<6% K2P distance) while high genetic distances were observed when compared to other Hylomys taxa (>18.0% K2P distance). Based on these facts, we confirm that the gymnures from Genting Highlands belong to a valid species, Hylomys maxi along with other Peninsular Malaysia samples based on genetics and morphological data which probably originated from Sumatra a long time ago.
The Effect of Maggot Formulated Feed on Essential Amino Acids Composition, Digestibility and Growth of Dwarf Snakehead, Channa gachua Fry
Authors: Anik Martinah Hariati Anik Martinah Hariati , Ating Yuniarti Ating Yuniarti , Nasrullah Bai Arifin Nasrullah Bai Arifin , Muhammad Fakhri Muhammad Fakhri , Dewa Gede Raka Wiadnya Dewa Gede Raka Wiadnya
Published: December 2022

This study was carried out to evaluate the influences of maggot formulated feed on growth, digestibility, feed utilization, and body composition of local snakehead Channa gachua. Five practical diets with iso-nitrogenous (40% protein) and caloric level (3.5 kcal g-1) were determined as 10%, 20%, 30% 40%, and 50% substitution of maggot to fish meal protein. Results demonstrated that replacement of 30% protein from maggot in the diet produced in the highest specific growth rate (4.41 %BW day-1). These results were in line with feed conversion ratio (FCR) and protein utilization (PER) at increasing dietary maggot level from 10% to 30%. Feed digestibility also attained the maximum level at 30% of maggot substitution. Thirty percent protein substitution from maggot meal exhibited the highest growth performance, nutrient utilization, and digestibility than other treatments. Dietary inclusion levels of maggot meal in diet above 30% remarkably influenced the growth, FCR, PER, and digestibility of C. gachua. Regarding feed price concern, the application of maggot meal may potentially be profitable for snakehead’s fry culture.
FTIR- and UHPLC-Q-Orbitrap HRMS-Based Metabolomics of Sonchus arvensis Extracts and Evaluation of Their Free Radical Scavenging Activity
Authors: Mohamad Rafi Mohamad Rafi , Triyani Hasanah Triyani Hasanah , Alfi Hudatul Karomah Alfi Hudatul Karomah , Ade Heri Mulyati Ade Heri Mulyati , Trivadila Trivadila , Min Rahminiwati Min Rahminiwati , Suminar Setiati Achmadi Suminar Setiati Achmadi , Dyah Iswantini Dyah Iswantini
Published: December 2022

Sonchus arvensis, known as sowthistle, belongs to Asteraceae and contains numerous phenolic acids and flavonoids that exhibit antioxidants. The type of extraction solvent will affect biological activity level, resulting in different metabolite profiles that metabolomics approaches can evaluate by fingerprint analysis using FTIR spectrophotometry and UHPLC-Q-Orbitrap HRMS. Furthermore, the FTIR spectra and the metabolite profile of UHPLC-Q-Orbitrap HRMS were grouped using principal component analysis (PCA). This study aimed to clustering S. arvensis extracts based on different extracting solvents using the FTIR spectra and the detected metabolites and evaluate the free radical scavenging activity. The 50% ethanol extract gave higher free radical scavenging activity and more metabolites than the ethanol p.a. and water extracts. It indicates that the free radical scavenging activity is affected by the metabolites contained in the extract. Using a combination of the FTIR spectra and the peak area of the identified metabolites, S. arvensis extract can be grouped according to the extracting solvent. Thus, the extracting solvent affects the composition of the metabolites, resulting in different free radical scavenging activity levels.
A Geant4 Simulation on the Application of Multi-layer Graphene as a Detector Material in High-energy Physics
Authors: Mohamad Nor Nurul Hidayah , Anuar Nur Afira , Wan Abdullah Wan Ahmad Tajuddin , Goh Boon Tong , Raja Yahya Mohd Fakharul Zaman
Published: December 2022

The excellent properties of graphene, such as its high thermal conductivity, high electrical conductivity, and high electron density, make it an ideal candidate as a detector material in high-energy physics applications. In this work, we demonstrate the feasibility of multi-layer graphene (MLG) as a detector material in a high-energy environment. The Geant4 software package was used to estimate the energy of the deposited electrons within various thicknesses of MLG, ranging from 3 to 20 nm. The efficiency of the MLG as a detector material was further analyzed from the scattering angle and the yield of the secondary particles produced from the electron interaction with the material. The incident electron’s kinetic energy used herein ranged between 30 keV and 1 GeV, at a particle fluence of 1×107 e/cm2. The results show that the deposited energy was relatively low for the interaction with 1 MeV electrons, and dramatically increased as the thickness increases beyond 15 nm. This result was further supported by the highest yield of gamma radiation recorded by the interaction with a kinetic energy larger than 1 MeV, for thickness larger than 15 nm. The results suggest that the MLG works best as a charged particle detector in low energy ranges, while for high energy ranges, a thickness over 15 nm is suggested. The findings demonstrate that a MLG with a thickness larger than 15 nm could potentially be used as a detector material in high-energy conditions.
THE EFFECTIVE MANAGEMENT OF DISTANCE WORK IN CONDITIONS OF MODERN CHALLENGES
Authors:   Taras Shevchenko National University of Kyiv, Grishnova O.А. , Suprun K.V. ,   Taras Shevchenko National University of Kyiv
Published: December 2022

The article defines the essence and features of distance employment, analyzes the challenges and problems of personal management in the distant format of work, as well as the factors that determine the effectiveness of such work. The scientific novelty of the study is the systematization of features of distance employment and influencing factors on the effectiveness of personal management. An element of novelty also includes the analysis of the challenges of of personal management under the conditions of distance employment based on the author's sociological survey. A SWOT analysis of the transformational leadership theory as a method of effective work of personal management was conducted. The use of the "Technology-Organization-Environment" theory made it possible to single out main factors influencing the effectiveness of distance work of personal management: balanced state regulation; developed IT infrastructure; awareness of employees in the use of digital and communication technologies; organizational support of employees; workplace comfort; development of the necessary "soft skills" are positive attitude to work, concentration and emotional stability. The results of the author's survey on the experience of distance employment confirmed the generally positive assessment by employees of the distance work format. Many respondents noted increased productivity and a willingness to improve skills for work efficiency and effectiveness. At the same time, the survey also showed that distance employment has complications that can affect performance and labor relations. Communication, the system of management and leadership are undergoing a significant transformation. The lack of live communication has a significant impact on the cultural spirit and motivation of employees. Changing the work format requires employees to maintain high concentration during the working day and time management skills Based on the completed analysis, the methods of increasing the efficiency of management were singled out. The research hypothesis that the transformation of management methods in conditions of remote employment can increase the efficiency of employees' work has been confirmed.
Pengembangan Modul Tutorial Berkarya Batik Ikat Celup pada Pembelajaran Seni Budaya dan Prakarya di Kelas V SDN 1 Coper Jetis Ponorogo
Authors: Mufaridah Yunanda Afridatul , Sumanto Sumanto , Nihayati Nihayati
Published: December 2022

Abstract: The purpose of this research is to create a tutorial module about batik tie dye which is valid according to material experts, learning experts, users, and interesting to students. This research used Dick & Carey procedural model. The results of this development are the tutorial module for making one color batik tie dye and the tutorial module for making multicolored batik tie dye. The results of validation from material experts showed percentage of 93.75 percent (very valid). The results of the validation from learning experts showed percentage of 83.03 percent (valid). The results of validation from users indicate that the product is very valid with a percentage of 93.3 percent. In addition, the results of field trials with small group trials showed percentage of 86.25 percent and the large group trials showed percentage of 93.6 percent so the product can be categorized as an interesting product to be used in the learning process.

Abstrak: Tujuan penelitian ini yaitu untuk mengembangkan modul tutorial berkarya batik ikat celup yang valid menurut ahli materi, ahli pembelajaran, pengguna, dan menarik bagi siswa. Penelitian ini menggunakan model pengembangan Dick dan Carey. Hasil dari pengembangan ini berupa modul tutorial berkarya batik ikat celup satu warna dan modul tutorial batik ikat celup beberapa warna. Hasil validasi dari ahli materi menunjukkan persentase sebesar 93,75 persen (sangat valid). Hail validasi ahli pembelajaran menunjukkan persentase sebesar 83,03 persen (valid). Hasil validasi pengguna menunjukkan produk termasuk kategori sangat valid dengan persentase 93,3 persen. Selain itu, hasil uji coba lapangan pada kelompok kecil memperoleh 86,25 persen dan pada kelompok besar memperoleh persentase sebesar 93,6 persen sehingga produk dapat dikategorikan sebagai produk yang menarik untuk digunakan dala proses pembelajaran.
Upaya Guru dalam Mengendalikan Kedisiplinan Belajar Siswa di Kelas V SDN Wadung Kabupaten Malang
Authors: Fauriza Erlinda Cahya , Muchtar Muchtar , Mahanani Putri
Published: December 2022

Abstract: Student learning discipline is very necessary because it can facilitate the learning process in the classroom. This research aims to find out the efforts of teachers and the obstacles faced by teachers in controlling student learning discipline in class V of SDN Wadung Malang Regency. Research methods use descriptive qualitative. The data collection tools in this study used observation, interview, and documentation instruments. Data analysis uses qualitative descriptive analysis with miles and huberman models including data reduction, data presentation, and inference. The results of the study showed that the efforts made by teachers in controlling learning discipline by using classroom management through authoritarian, permissive, democratic, and pseudo-democratic approaches. Teachers also set good example examples, enforcing rules in the classroom, giving negative reinforcement and giving positive reinforcement to students. The obstacles faced by teachers in controlling student learning discipline are the teacher's reluctance to provide negative reinforcement to students.

Abstrak: Kedisiplinan belajar siswa sangat diperlukan karena dapat memperlancar proses belajar di kelas. Penelitian ini bertujuan untuk mengetahui upaya guru serta kendala yang dihadapi guru dalam mengendalikan kedisiplinan belajar siswa di kelas V SDN Wadung Kabupaten Malang. Metode penelitian menggunakan kualitatif deskriptif. Alat pengumpulan data pada penelitian ini menggunakan instrument observasi, wawancara, dan dokumentasi. Analisis data menggunakan analisis deskriptif kualitatif dengan model miles dan huberman meliputi reduksi data, penyajian data, dan penarikan kesimpulan. Hasil dari penelitian menunjukan bahwa upaya yang dilakukan guru dalam mengendalikan kedisiplinan belajar dengan menggunakan pengelolaan kelas melalui pendekatan otoriter, permisif, demokratis, dan pseudo demokratis. Guru juga memberikan contoh teladan yang baik, menegakkan peraturan di kelas, pemberian hukuman serta pemberian penghargaan kepada siswa. Kendala yang dihadapi guru dalam mengendalikan kedisiplinan belajar siswa yakni keengganan guru dalam memberikan hukuman kepada siswa.