bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determination of Sulfur Content in Mineral Mass for Prediction of Hazardous Properties of Coal Mine Seams
Authors: Pronskaya N. V. , Filatieva E. N. , Filatiev M. V. , Shashlo N. V. 
Published: March 2024

Introduction. Sulfur is found in the organic and mineral parts of all types of solid fuels, and its concentration determines the extent of the hazardous characteristics of mine seams. Therefore, research on the determination of sulfur content in fossil fuels has not lost its relevance. The total sulfur content and its varieties has been studied in most cases in terms of the efficiency of fuel processing processes, the quality and environmental safety of coal products. Less attention was paid to the hazardous properties of mine seams, forecasting and developing preventive measures for endogenous fires in coal mines. This work aims to develop an engineering method to calculate the elemental sulfur content in the mineral mass of coal to predict the hazardous properties of mine seams.Materials and Methods. According to the results of the correlation analysis, we established how the sulfur content in the combustible part of the fuel depended on the total sulfur. We analyzed data on coals from almost all mine seams of the Donetsk and Lviv-Volyn coal basins. We presented the ash ratios for the formation and basin samples, as well as the information about the total sulfur and sulfur content in the combustible part. This allowed us to estimate the sulfur content in mineral impurities by calculation. The initial data for developing the method were taken from reference and regulatory documents.Results. Seven sets were considered, which included from 149 to 1827 mine seams. For each, reference and calculation data were summarized:- sulfur content — total (Std) and in the combustible part of the fuel (Sг);- conditional points for adjusting the indicators to avoid obtaining negative average values;- empirical equations that describe the calculated and corrected dependencies based on the ratio of Std and Sг;- correlation of these indicators;- ranges of change in ash yield.All this information was presented for clean and raw coals, for ash yields of more and less than 10%. In one case, satisfactory results were noted for determining the calculated sulfur content in a conditionally non-combustible mass. This was a set of 149 mine layers. For 13 of them, the difference in indicators (Std – Sг) was greater than or equal to zero. For 136 — less than zero. For 81, the sulfur content in the conditionally non-combustible part of the fuel Sн was less than zero. At the same time, there was a sufficient level of correlation (0.79) and a limited range of changes in ash yield (2.4–10). The empirical equation corresponding to this set was recommended for predicting the hazardous properties of mine seams with an ash yield of less than 10%.Discussion and Conclusion. The results of this study can be used to improve regulations for the safe conduct of mining activities, taking into account sulfur content in organic matter and in mineral impurities of fossil coal.
Methodology for Determining the Parameters of a Mathematical Model of the Dynamics of the Psychophysiological State of a Metallurgical Equipment Operator
Authors: Vishnevsky D. A. , Podlipenskaya L. E. , Denisova N. A. , Bondar N. A. 
Published: March 2024

Introduction. Mathematical modelling is effective in the analysis of industrial safety at metallurgical plants, in particular for tracking problems of the man — machine system. To introduce the time factor, recurrence relations (in a discrete model) and differential relations (in a continuous model) are used. However, it is also necessary to solve the problem of linking the model parameters to the real conditions of the production environment and to the human factor.The aim of this study is to create a method for determining the parameters of simulation mathematical models of the dynamics of the operator’s psychophysiological indicators affecting the work.Materials and Methods. The operator’s psychophysiological state (PPS) was assessed by performance, fatigue levels, and error rate. The data were collected by the Digital Correction Task (DCT) test. Based on the obtained results, the experimental values of the operator’s PPS indicators, which were reduced to the normalized scale [0, 1], were calculated. These indicators for a particular respondent, the mathematical model and the developed algorithm were used to determine the numerical values of the model parameters. In order to interpret the indicators of performance, fatigue and error rate, we introduced scales with five gradations.Results. The use of the authors’ modified version of the mathematical model showed a significant improvement in its prognostic properties. Out of 10 participants the best result was shown by respondent no. 7, the worst result was shown by respondent no. 8. During the first working hour (from 9.00 to 10.00) their performance increased almost equally, from 0.5–0.55 to almost 0.6. Then the score of respondent no. 7 increased and remained well above the “good” level until the end of the day. The score of respondent no. 8 dropped and was below average from 14.00 to 15.00. The difference was largely determined by the operators’ chronotypes. Their chronophysiological characteristics also affected fatigue and error rate. The model’s quality varied for different participants in the experiments. In one case it was excellent (mean relative error ≤5%), in three cases it was good (≤10%) and in four it was satisfactory (≤15%).Discussion and Conclusion. The proposed approach allows us to obtain the dynamic profiles of psychophysiological characteristics for every individual, to assess their interrelationships and to perform a prediction on the basis of a modified mathematical model. However, in order to extend the functionality of the models to the real working conditions of the metallurgical plant operator, it is necessary to increase the sample size, reduce the discrete time step and conduct studies for different working conditions, considering technological, climatic, environmental, psychological and other factors.
Stimulation of the Bainite Transformation Scenario by an External Magnetic Field
Authors: Dolgachev Yu. V. , Pustovoit V. N. , Nefedov D. V. 
Published: March 2024

Introduction. It makes practical sense to change the properties of steels with a bainite structure, as with bainite transformation under the influence of a magnetic field, it is possible to improve the ductility of the steel while maintaining or even increasing its strength. Scientific research in this area has focused on the influence of the magnetic field on thermodynamics and on the change in the phase transformation scenario. However, there is no detailed description in open sources of the effect of a magnetic field on the structure and properties of the products of intermediate bainite transformation. The aim of the work is to study the peculiarities of the influence of an external magnetic field on the scenario and kinetics of phase transformation of steel.Materials and Methods. The study was conducted using samples made of 65G steel. Their chemical composition was monitored using a Magellan Q8 optical emission spectrometer. Heat treatment (resistive heating) was carried out in an IMASH 20–75 installation for high-temperature research. The heating temperature was approximately 1000 degrees 1000°C, and the holding time was 10 minutes. The sample was cooled down using water-cooled electrical contacts. An external magnetic field with a strength of 400 kA/m and 800 kA/m was created by an electromagnet integrated into the vacuum chamber of the installation.Results. The experiments confirmed the potential for altering the transformation pathway from pearlite into bainite in the presence of an external magnetic field of up to 1 MA/m. Images of the microstructure and surface relief of samples after cooling in a magnetic field were obtained. Kinetic changes and dependencies of the volumetric transformation rates on the duration of isothermal exposure were analyzed. It has been found that exposure to a constant magnetic field of 1.6 MA/m increased the volumetric transformation rate by 1.808 times (for 65G steel) and by 1.687 times (for 45H steel).Discussion and Conclusion. The results of observations of changes in the surface relief during cooling in the absence of a magnetic field, and in magnetic fields of various strengths, were recorded. This has allowed us to draw the conclusion that the external magnetic field stimulates the bainitic transformation instead of the original pearlitic one. Microstructural changes can be explained by the influence of the magnetic field on the initial phase magnetic state.
Diagnosis of the type of delivery of pregnant women at Semen Padang Hospital Using the C4.5 Method
Authors: Rama novialdi  , Dony Permana  , Dodi Vionanda  , Fadhilah Fitri  
Published: March 2024

ABSTRACT
The health of the mother and fetus is very important, but there are many challenges and risks associated with pregnancy and childbirth. According to WHO, in 2020 there were 287,000 cases of women dying during pregnancy and childbirth. Causative factors that affect the type of delivery include the age of pregnant women, MGG, systole, diastole, and pulse. One method that can be used to group the types of childbirth of pregnant women is classification. C4.5 is one of the methods used in forming decision trees to produce decisions. The purpose of C4.5 is to obtain attributes that will be the main criteria in the classification. Based on optimal tree results, the attribute that is the main criterion in classifying the type of delivery of pregnant women who give birth by cesarean section and normal delivery at Semen Padang Hospital is MGG. Determination of classification results using confusion matrix resulted in an accuracy value of 74%, sensitivity of 80% to classify the type of delivery of pregnant women who gave birth caesarean, and specificity of 66.67% to classify the type of delivery of pregnant women who gave birth normally.
Forecasting Gold Prices in Indonesia using Support Vector Regression with the Grid Search Algorithm
Authors: Syahfitrri Nindi , Nonong Amalita  , Dodi Vionanda  , Zamahsary Martha  
Published: March 2024

Investment is an effort to increase economic growth in Indonesia. A popular investment in the community is gold investment. The value of gold investments tends to increase but is not immune from price fluctuations, therefore it is important to forecast the price of gold in Indonesia. The method that can be used to make this forecast is Support Vector Regression (SVR). SVR is a method that looks for a function that has a deviation of no more than ε to get the target value from all training data. The best SVR model with a linear kernel was obtained from a combination of parameters C=0,0625 and ε=0,001 with a RMSE value of 0,19734 and a value of 0,974112. So, the SVR method is appropriate to use for forecasting gold prices in Indonesia.
Twitter Data Sentimen Analysis 2024 Presidential Candidate Using Algorithm Naïve Bayes Classifier By Methods K-Fold Cross Validation
Authors: Aldi Prajela  , Syafriandi Syafriandi  , Dony Permana  , Dina Fitria  
Published: March 2024

Indonesia implements a democratic system by involving the public in General Elections (Pemilu) for specific political positions. The active community expresses opinions on social media, especially regarding the 2024 Presidential Election (Pilpres) and respective presidential candidates, which have become trending topics on Twitter. The analysis used to absorb these tweets into information is sentimen analysis using the Naïve Bayes Classifier algorithm with the K-fold Cross-Validation method. Through the stages of pre-processing, weighting, labeling, classification using NBC, and testing using a Confusion Matrix, The results of the classification from NBC showed that Anies got 80% positive tweets and 20% negative tweets from 1186 tweets, Prabowo Subianto got 78% positive tweets and 22% negative tweets from 1149 tweets, and Ganjar Pranowo got 77% positive tweets and 23% negative tweets from 1075 tweets. Testing process was carried out using the NBC algorithm with the K-Fold Cross Validation method using values k=1 to k=10. The function of K-Fold Cross Validation is to maximize the confusion matrix result. It can be conclude that Anies Baswedan has the highest score in iteration 4, namely a precision value of 90%, a recall value of 99%, and the accurary value of 91%. Furthemore, Ganjar Pranowo had the highest score in iteration 9, namely a precision value of 95%,a recall value of 97%, and an accuracy value of 92%. Meanwhile, Prabowo Subianto had the highest score in iteration 9, namely a precision value of 97%, a recall value of 99%, and an accuracy value of 94%.
CAUSE AND EFFECT RELATIONSHIP OF BLOOD LOSS AND CAUSE OF DEATH IN INJURIES AND DISESSES
Authors: Mykhailychenko Borys , Biliakov Andrii 
Published: March 2024

Forensic medical practice shows that the death of a person can be accompanied by blood loss, which is the result of an injury, or a manifestation of a disease, and therefore, during the forensic medical examination, it is necessary to establish a causal relationship between it and the cause of death. In order to solve these issues, the results of the autopsy, histological examination, analysis of clinical and laboratory hematological data, as well as morphological changes in the heart muscle play a leading role.
Aim of the work. Forensic-medical substantiation of the cause of death and features of establishing a cause-and-effect relationship with blood loss in injuries and diseases.
Materials and methods. The material of the study was cases of death due to injuries and diseases accompanied by the development of blood loss, which were analyzed in accordance with the instructive forensic and clinical materials.
Results. Severe injuries to the human body are accompanied by the development of blood loss, the consequences of which can cause a shock reaction. Clinically, the body's reaction to blood loss occurs when more than 15 % of BCC is lost, and severe shock develops in case of blood loss of more than 25 % of BCC, which is approximately 1,25-1,5 liters of blood. In addition, the speed of blood loss is also important, as a result of which the body's protective mechanisms do not have time to compensate for it. In the case of forensic substantiation of acute blood loss as the cause of death, autopsy and histological examination data are usually used. However, blood loss of varying degrees can also accompany a number of diseases, as a result of which the body develops anemia with hypoxia, which affects the state of the cardiovascular system. In such cases, blood loss does not directly lead to death, but causes disorders in the function of the heart, in particular, exacerbation of the course of coronary disease. This pathogenetic mechanism indicates the absence of a direct causal relationship between blood loss and the onset of death. In such cases, to justify the cause of death, it is necessary to pay attention not only to the presence of clinical indicators confirming blood loss, but also to laboratory hematological data – the content of erythrocytes, the amount of hemoglobin, hematocrit, and most importantly – morphological changes of the heart, which must be described by the most thorough way
Conclusions. Complex analysis of all morphological changes and findings during examination of corpse, clinical symptoms of diseases, results of gradual hematological investigations are used to estimate the cause of death. To avoid occurrence or exacerbation of the course of the ischemic heart diseases the monitoring of function of the cardio-vascular systems and electrocardiography in patient with blood loss as symptom of diseases should be used in clinical practice.
Management of Raudloh Tarbiyyatil Qur’an (RTQ): Islamic Activities for Elementary School Students’ Self Development
Authors: Al Afgani Yaomi , Ariyani Dewi 
Published: March 2024

This study is based on students’ inability to apply Islamic teachings. The
purpose of this research is to examine the management of Raudloh Tarbiyyatil Qur’an
(RTQ), a self-development program in Islamic studies at MI Ma’arif NU 1 Pageraji
Banyumas Indonesia. This study employs a qualitative approach with a case study
methodology. The study lasted from April 4th, 2023 to June 4th, 2023. The data was
gethered through observation, interviews, and documentation. Data were analyzed
using steps such as data reduction, data display, and conclusion drawing. According
to the findings of this study, the Raudloh Tarbiyyatil Qur’an program has the following
management functions: 1) Planning by setting goals, developing strategies for the
creation of a goal including teaching and education personnel, activities to be carried
out, determining learning methods, and preparing learning plans; 2) Organization by
preparing the organizational structure, authority and responsibility, placement of
human resources; 3) Implementing Raudloh Tarbiyyatil Qur’an by implementing
planned activities and programs, and evaluating the results of program activities,
which in Raudloh Tarbiyyatil Qur’an include three things, namely: tahfiz, reading and
writing the Qur'an, and ubudiyyah. All of these activities are carried out on a
scheduled basis and are included in the self-development stage and the learning
stage; 4) Supervision oversees the process of implementing teacher performance
activities.
Visibility through Distributive and Corrective Justice: A Reading of Munshi Premchand’s “The Woman Who Sold Grass” and M.M. Vinodini’s “The Parable of the Lost Daughter”
Authors: Sengupta Satarupa 
Published: March 2024

This essay takes a look at Munshi Premchand’s short story “The Woman Who Sold Grass” (“Ghaaswali”, 1929) that represents the harassment of a Dalit woman grass cutter that is not reported to the police so that no corrective justice is offered although the woman herself criticizes the caste-based assessment of her identity. The harasser, the upper-caste landlord Chain Singh, offers a form of reparation that resembles distributive justice for a Dalit family after observing the Dalit woman being verbally harassed by working-class “lower-caste” coachmen. M.M. Vinodini’s short story “The Parable of the Lost Daughter” (translation first published in 2013) is also examined for its representation of upward mobility and distributive justice for a young Dalit Christian woman who belongs to a working-class family and becomes a research scholar but decides to conform to Brahmanical practices on her way to empowerment and to erase her Dalit Christian identity. This seems to imply that distributive justice in India perhaps encourages compliance with upper-caste practices and fortifies the patriarchal category of caste itself. Her abuse by the father and brother-in-law of her close friend encourages her “return” to the patriarchal category of caste. The essay concludes by referring to Dr Ambedkar’s speech “We Too Are Human” that argues for the extermination of the Hindu caste hierarchy. The essay concludes that the visibility of Dalit and “lower-caste” communities, especially women, and their literature and cultural forms has to be amplified through the visible operation of corrective and distributive justice against all attempts to obliterate them.
STRATEGI KEPALA SEKOLAH DALAM MENJAMIN KUALITAS PROSES PEMBELAJARAN
Authors: Ulya Lulu Khanifatul , Mahmudah Fitri Nur 
Published: March 2024

Pembelajaran merupakan kegiatan pokok yang terjadi di satuan pendidikan, pembelajaran yang berkualitas akan berdampak pada hasil pembelajaran peserta didik dan hasil lulusan sekolah. Penelitian ini bertujuan untuk menganalisis dan mengungkap strategi kepala sekolah dalam menjamin proses pembelajaran yang berkualitas. Metode penelitian ini menggunakan penelitian kualitatif deskriptif dengan desain penelitian studi kasus. Serta teknik pengumpulan data dengan observasi dan wawancara. Hasil yang peneliti temukan pada penelitian ini bahwa kepala sekolah melakukan beberapa strategi dalam menjamin kualitas pembelajaran di sekolah, antara lain: menjamin karir guru dalam program guru penggerak, melakukan supervisi, dan memberi evaluasi berupa saran dan masukan. Sedangkan guru berperan dalam menentukan strategi pembelajaran, pengelolaan kelas, merancang modul ajar, menentukan media pembelajaran yang sesuai dengan karakteristik peserta didik, serta menjalin hubungan baik dengan peserta didik dan wali peserta didik. Penjaminan kualitas proses pembelajaran tidak serta-merta menjadi tanggung jawab kepala sekolah, akan tetapi menjadi bagian tugas pokok dari seorang guru dalam melaksanakan pembelajaran di dalam kelas, sehingga dengan diterapkannya beberapa strategi tersebut sangat berdampak pada proses pembelajaran yaitu siswa ikut aktif dalam pembelajaran, meningkatkan hasil belajar, dan menghasilkan lulusan sekolah yang berkualitas.
The One Health dissemination of antimicrobial resistance occurs in both natural and clinical environments
Authors: Ballash Gregory A. , Parker Elizabeth M. , Mollenkopf Dixie F. , Wittum Thomas E. 
Published: March 2024

Abstract
Once considered to be a simple cause-and-effect relationship with localized impact, the concept of how antimicrobial use drives antimicrobial resistance is now recognized as a complex, transdisciplinary problem on a global scale. While the issue of antimicrobial resistance is often studied and addressed at the antimicrobial-human or antimicrobial-animal treatment interface, the role of the environment in the One Health dynamics of antimicrobial resistance is not as well understood. Antimicrobial-resistant bacteria, including those resistant to carbapenem drugs, are emerging in veterinary clinical environments, on farms, and in natural habitats. These multidrug-resistant bacteria can colonize our livestock and companion animals and are later disseminated into the environment, where they contaminate surface waters and colonize wildlife. From here, the One Health transmission cycle of antimicrobial-resistant bacteria is completed as environmental reservoirs can serve as sources of antimicrobial resistance transmission into human or animal healthcare settings. In this review, we utilize a One Health perspective to evaluate how environments become contaminated and, in turn, become reservoirs that can colonize and infect our veterinary species, and how the veterinary field is combating environmental contamination with antimicrobial stewardship regulations and program implementation. The companion Currents in One Health by Parker et al, AJVR, April 2024, addresses the intensive research that justifies this One Health cycle of antimicrobial resistance transmission and emerging techniques that are dissecting the complex interactions at the One Health interface.