bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effect of Ciprofloxacin on Prostate-Specific Antigen (PSA)
Authors: Gustiano Andre Dwi , Alvarino Alvarino , MYH Etriyel , Yunir Peri Eriad
Published: February 2023

Increased PSA levels can be caused by prostate cancer, prostate infection, and BPH. Several studies report that the use of antibiotics can affect PSA levels. This study aims to determine the effect of ciprofloxacin administration in patients with prostate-specific antigen values ??of 4-10 ng/mL. This was an analytical study with a prospective cohort design. This study was conducted at Dr. M. Djamil Hospital, Padang starting from July 2022 until October 2022. The sampling technique used non-probability sampling with consecutive sampling method. The patient was given the antibiotic ciprofloxacin 2x500 mg for 2 weeks. PSA measurements were carried out before and after administration of antibiotics. There were 20 subject with an average age of 62.65 years (52-79). The mean of initial PSA value was 6.53 ng/mL and the final PSA value was 5.76 ng/mL. There was a significant difference between PSA levels before and after administration of ciprofloxacin (p=0.000). The use of antibiotics in patients with PSA levels of 4-10 ng/ml can reduce PSA levels.
Observing Digital Leadership Model through Interpretative Phenomenological Analysis a la Regulator during Pandemic Era
Authors: Hutasoit Ridhony Marisson Hasudungan , Kurniasari Florentina , Situmorang Ringkar
Published: February 2023

he COVID-19 pandemic has had a significant impact on changing people's behavior. The pandemic has become one of the accelerators for the acceleration of human civilization to internalize technology in various dynamics of human life. One of the sectors affected by this pandemic is the financial services sector, which includes the banking sector, capital markets, and the non-bank financial industry. This dynamic needs to be responded by the Financial Services Authority (OJK) as the regulator, supervisor, and enforcer and consumer protection service in the financial services sector in accordance with Law Number 21 of 2011 concerning the Financial Services Authority. The role of OJK representatives in the regions became significant as an extension of the head office. The role of digital leaders is needed in achieving task force performance through digital transformation. The phenomenological approach is an option in this research as a medium to explore research problems. Researchers use Interpretative Phenomenological Analysis (IPA) as a data analysis technique in tracing the meaning of the phenomenon that occurs. Based on the results of research conducted by the OJK of Southeast Sulawesi Province, seven qualities of the digital leader model in the success of digital transformation consisted of digital literacy, vision, stakeholder concern, agility, risk taking, collaboration, and compliance with regulations/policies.
The Relation of Deworming with Nutritional Status of Elementary School Students in Sicanang
Authors: Sarni Yuni , Sudaryati Etti , Nurmaini Nurmaini
Published: February 2023

Related to environmental sanitation and behavior which results in a decrease in health conditions, nutritional status, intelligence levels, and productivity of sufferers, causing economic losses.  helminthiasis with BMI/U nutritional status, using a descriptive correlation design with a cross-sectional approach.  Sample 103 students of SD Negeri 066669 (IV number 42 and V total 61) with purposive sampling technique, namely inclusion and exclusion criteria. Data analysis was univariate analysis with frequency distribution, and bivariate analysis used Spearman rank ( p <0.05). Most helminthiases were in the non-wormed category 87.4%. There was a significant relationship between helminthiasis and nutritional status BMI/U p value = 0.002. That there is a significant correlation between helminthiasis and the nutritional status of BMI/U due to personal hygiene and a slum environment, especially the lack of clean and healthy living behavior (PHBS).
Taxpayers’ Trust on Rural and Urban Lands and Building Tax Online Payment Using QRIS
Authors: Wulansari Kristin , Kalangit Della Olivia Caterina , Satryawati Satryawati , Kawuryan Renita
Published: February 2023

Background: Quick Response Code Indonesian Standard or commonly abbreviated as QRIS is the unification of various QR types from various Payment System Service Providers (PJSP) using a QR Code, QRIS can accept all payments from anywhere, both Bank and Non-Bank (Fintech), The Regional Revenue Service of Samarinda City applies QRIS as one of the means of payment of The Rural and Urban Land and Building Tax.
Aim: This study was conducted to measure the confidence of taxpayers in accepting QRIS for The Rural and Urban Land and Building Tax Payment. The model used in this study is the Technology Acceptance Model (TAM) with the addition of the trust variable.
Method: The data used are primary data obtained through distributing questionnaires to 180 respondents using QRIS as a means of paying The Rural and Urban Land and Building Tax in Samarinda City, where the implementation of the results of the research on the main respondents aged 25-45 years. There are five variables used in this study, namely perceived usefulness, perceived ease of use, intention to use, application use, and trust.
Findings: The results obtained are Perceived Usefulness and Perceived Ease of Use have a significant influence on Attitude Toward Using. The Attitude Toward Using variable has a significant effect on Behavioral Intention To Use, and the Trust variable has a significant influence on Perceived Usefulness, Perceived Ease of Use, and Behavior Intention to Use. This means that Trust affects the use of QRIS every day and in the future.
Factors Related to the Utilization of Birth Waiting House by Delivery Women in the Working Area of Puskesmas Treatment, Padang City
Authors: Iffah Uliy , Safaringga Miranie , Shabrina Rani , Ridwan Laila Hijradesy
Published: February 2023

Birth Waiting Home (RTK) is a government program that aims to reduce maternal mortality. But in reality, there are still many people who do not take advantage of this facility. The purpose of this study was to analyze the factors related to the use of maternity waiting homes (RTK) by mothers in the city of Padang. This research is explanatory survey research conducted in four treatment centers in the city of Padang. The research sample was 185 mothers who gave birth in January-July 2022 at four Padang City Health Centers. Data collection tool using a questionnaire. The data analysis method used is chi-square at the 95% level of confidence. The results of the study show that none of the respondents used RTK. Knowledge, attitude, parity, mileage, and health insurance are not related to the use of maternity waiting homes (RTK). It is recommended to the Padang City Health Office to carry out routine supervision of the implementation of work programs related to maternal and child health, especially the use of birth waiting for homes (RTK) in all health centers in Padang City.
The Relationship of Mental Health Literacy to Help-Seeking Behavior: Systematic Review
Authors: Iswanto Endro Dwi , Ayubi Dian
Published: February 2023

Mental health is an important aspect in realizing overall health. It is estimated that one in four people will suffer from a mental disorder during their lifetime. There are approximately 450 million people suffering from mental and behavioral disorders worldwide where about 85% of people with severe mental disorders in developing countries do not receive treatment for their disorders. This study aims to determine the relationship between mental health literacy and help-seeking behaviors. This research method uses Systematic review to search for articles on several data based including: PubMed, EBSCO, Science Direct, ProQuest, Taylor & Francis, Scopus, and Google Scholar. Search results obtained with the keywords Mental health literacy, mental health, help-seeking behavior obtained 539 articles. After being filtered based on inclusion criteria, namely research articles relevant to the purpose of writing, free full-text, English or Indonesian, respondents' age of 15 years, and published in 2018-2022 produced 62 articles. The same article, not the result of a research or³ review article, and different articles of targets and variables were issued so that 10 articles were obtained. The result of this study is that there is a significant relationship between mental health literacy and help-seeking behaviors. The relationship of mental health literacy to help-seeking behaviors is positive meaning that an increase in scores on mental health literacy also affects an increase in scores on help-seeking behaviors. It can be concluded that the higher the level of mental health literacy, the more it can improve help-seeking behavior.
Narcissistic Pastiche: Towards Exploring the Concept of “Cras es noster” Through Nostalgic Postmodernism in John Green’s The Fault in Our Stars
Authors: Jweid Abdalhadi Nimer Abdalqader Abu
Published: February 2023

This paper attempts to explore the concept of “cras es noster” through revealing John Green’s The Fault in Our Stars as a postmodern narcissistic pastiche. The study demonstrates how Green deviates postmodern literary traditions to offer viable solutions to contemporary writing impasses. Therefore, it examines the characters as embodiments of postmodern writers facing writing obstacles, especially the lack of avant-garde techniques which could be employed in fictional writings to revive the dwindling spirit of narrative potential needed to enhance the future of fiction as a whole. The study offers an in-depth analysis of the novel as a postmodern pastiche of Renaissance’s canonical penchant fascination with literary innovation. In this regard, it polarizes the Latin concept “cras es noster” within a postmodern context for the sake of departing into ingenious writing forms. These forms unconventionally reflect the authorial nostalgic hope to reinforce the sense of creativity in postmodern literature inspired by the past grand works, especially the Shakespearean grand style. The authorial propensity for establishing such aesthetic form is accomplished by narcissistic narrative perspective, which implicitly refers to the presence of the authorial voice in the plot. The study’s methodology is a qualitative textual-contextual interpretation of the selected novel’s postmodern themes and techniques. Thus, there are two main findings of the study. First, it explores Green’s The Fault in Our Stars as a postmodern pastiche of Shakespeare’s grand style. Second, it unravels the concept of “cras es noster” as being present in the novel via its narcissistic emphasis on writing great works to reinforce the future of fictional writings.
An Error Analysis of Coordinating Conjunction Misuse in Chinese ESL Learners’ Writings: A Corpus-based Approach
Authors: Chen Muyu
Published: February 2023

Coordinating conjunctions, which are more recurrently used words than the other words in English, are not as easily well-acquired by Chinese students as they are intuitively used by native speakers. Yet, insufficient attention has been drawn to the study of coordinating conjunctions, which often leads to great difficulties in the acquisition of coordinating conjunctions for Chinese English as a second language learners. The present thesis has selected the three coordinating conjunctions of higher frequency, and, but and or as the target words in the research to analyze the misuse of these words in Chinese ESL learners’ writings of English under the theory of Error Analysis.The thesis established two corpora: Learner Corpus with 21 theses of Chinese graduate students of English major, downloaded from China National Knowledge Infrastructure (CNKI); Control Corpus with 22 theses from Proquest-PQDT. All the dissertations were essay writings about linguistics and were randomly selected. It was shown that there existed a minor gap in the frequency usage of coordinating conjunctions and, but and or between Chinese students of English major and native English speakers. However, the usages of SIA (Sentence-initial And) and SIB (Sentence-initial But) were strongly different between Chinese ESL learners and native English speakers. The conclusions above could serve as pedagogical references for English teachers in China so that Chinese ESL learners could come close to native speakers in terms of the usages of the three coordinating conjunctions and, but and or.
The Effectiveness of Teacher Autonomy Supportive Style on Enhancing Student Engagement in EFL Virtual Classrooms
Authors: Salami Faten Ahmed , Althaqafi Abeer Sultan
Published: February 2023

Promoting students’ engagement in classrooms is among the most significant challenges faced by teachers in virtual classrooms. Prior research has investigated the effectiveness of using teacher autonomy supportive style (TASS) during in-person classes (Jang et al., 2010; Li et al., 2020; Núñez & León, 2019; Reeve et al., 2004). However, limited research has been conducted in virtual classrooms (Bedenlier et al., 2020; Chen & Jang, 2010; Chiu & Hew, 2018). Ryan and Deci (2020), suggested that further research should focus on student engagement within virtual classrooms. Moreover, although EFL teachers often struggle to engage their students (Susanti, 2020), the majority of the related studies have been carried out in various learning contexts (Jang et al., 2010; Li et al., 2020; Shih, 2008). Most of this limited body of literature in the EFL context is composed primarily of quantitative research collected through cross-sectional study designs. Evidence suggests that this gap can be addressed by conducting well-designed qualitative studies investigating student engagement (Fredricks et al., 2016; Harris, 2011; Zyngier, 2008). Thus, there is an urgent need for research that tackles these gaps effectively.
Absorption and Translocation Capacity of Cadmium in Papaya (Carica papaya L.) Plants With Addition of Organic Matter
Authors: Amaro-Espejo Isabel A. , Castañeda-Chávez María D. R. , Murguía-González Joaquín , Lango-Reynoso Fabiola , Bañuelos-Hernández Karina P. , Galindo-Tovar María E. , Fernández-Martínez Ana M.
Published: February 2023

Cadmium (Cd) is a toxic element that can be easily absorbed by crops, and can enter through the frequent use of fertilizers in crop areas. The objective of this study was to evaluate the bioaccumulation percentage (BAP) and translocation factor (TF) of Cd in papaya plants exposed to contaminated soils at 50, 100 and 150 mg L-1 and at two concentrations of organic matter: 2% and 10%-MO. Growth variables, chlorophyll and metal concentration were measured after 10 months of cultivation. The results indicated that the greatest growth occurred in soil at 10%-OM in relation to those grown at 2%-OM. Cd bioaccumulation was leaves < stem < root (9 < 22 < 68%) at 50 mg L-1, (7 < 29 < 65%) at 100 mg L-1 and (4 < 34 < 63%) at 150 mg L-1, observing the greatest accumulation in the root. The findings showed that organic matter in soil decreases the availability of metal uptake in the roots. The translocation results were < 1, indicating that the root has the ability to restrict metal transport to the aerial part in plants grown in 10%-OM soil, however, in 2%-OM soil it tends to increase this metal accumulation, suggesting that the application of organic amendments is an alternative to reduce the risk of Cd absorption in agricultural soils.
Response of Ozone Treatment on Disease Incidence, Dissolved Oxygen Levels, Growth and Yield of Cucumber Crop Grown in Hydroponics in Cooled Green House. Season: Summer (June-August) at DGALR, Rumais
Authors: Al-Rawahy Muthir S. , Al-Abri Waleed S. , Al-Hinai Alya S. , Al-Abri Hussain A. , Al-Mahrooqi Siham H. , Al-Shmali Narjis M. , Al-Khatri Zainab T. , Al-Subhi Khalifa S.
Published: February 2023

One of the main concerns related to closed systems is the potential spread of root pathogens. With the recirculation of nutrient solutions. Ozone treatment was tested for the efficacy against plant pathogen (Pythium), growth and yield of cucumber crop grown in hydroponic closed system during summer season (June-August) 2022. Two nutrient solution feeding tanks were used one with ozone treatment and other without ozone treatment in randomized complete design (RCD) with four replication. The results showed significant (p < 0.05) differences were observed between the treatments in diseases infections with pythium diseases. No significant (p < 0.05) differences were detected in chlorophyll content, as SPAD values and yield between the two treatment of cucumber statistically. Ozone treated plants produced more yield 4.0 ton/gh.
Mímesis y niveles de la expresividad teatral en el Quijote
Authors: Salazar Quintana Luis Carlos
Published: February 2023

La pregunta sobre la teatralidad en el Quijote revela para el estudioso diversos aspectos dignos de notar; entre otros, los que se relacionan con la gestación de la obra, el contenido y su estructura, así como la realización lingüística y la eficacia de su comunicación, a partir de la forma en que el texto cervantino está diseñado para ser leído, escuchado e imaginado. Al mismo tiempo en que se dialoga con la crítica sobre el tema, se comparten en este ensayo reflexiones sobre los objetos, modos y medios miméticos que construyen los niveles de la expresividad teatral de la novela en mención y que son aprovechados magistralmente por Cervantes para alcanzar así su propósito último, que era crear la ilusión de la vida directamente representada.
Perception of Women Entrepreneurs about the Usefulness of Various Television Shows: A Case Study on Media for Motivation
Authors: Banerjee Swapan
Published: February 2023

Quality media has the potential to have a profound effect on everyone’s mind, including women entrepreneurs. Her IQ is shaped in many ways: by genes, environment, upbringing, unities for formal and informal education, and culture. For decades, there have been many motivating and learning TV shows; however, some shows still have no effect or adverse effects irrespective of age group. Hence researchers have devised several exciting methods to disentangle TV's effects keeping good programs. This article aims to assess the perception of women entrepreneurs about the 6 significant types of TV latest shows starting from 0-2 ratings (low, medium, and high quality). Jamovi software, the 2.3.21 version, was applied for statistical analysis. The study found the Cronbach alpha 0.65, which is good enough to justify the reliability and scale reliability with a mean value of 1.32 and a standard definition of 0.409. Six Items-rest correlation, Correlation Heatmap, and Binomial Test (95% Confidence Interval) of all six items as top media category used for perception analysis. The study concluded that even in the world of entrepreneurship and big business, women now have just as much of a chance as males. They organize and participate in stimulating, upbeat, and inspiring endeavors during their free time via online platforms and mainstream media. As per this study, the women urban population primarily watches shows that entertain their minds or link with other attractive aspects. However, they also worry about their well-being and the well-being of their husbands and offspring, which means that business, education, sports, and health are high priorities.
استخدام أطلس منسل لدراسة ألوان بعض الترب المختارة في محافظة كربلاء
Authors: عاشور حمزة الطائي أياد , جابر محسن المسعودي هاني
Published: February 2023

ركز هذا البحث على استخدام أطلس منسل لتحديد ألوان الترب في محافظة كربلاء، ويعد الأطلس من الوسائل الجيدة في الكشف عن ألوان الترب وتصنيفها حسب لون التربة، وأطلس منسـل ابتكره العالم ألبرت منسل في العقد الأول من القرن العشرين، لتقدير الألوان بالأرقام بصورة عقلانية بدلاً من الوصف وقد سُمي باسمه وهو طريقة للتعـبير عن اللون بأسلوب كمـي بواسطة الأرقام، اسـتفاد منه علماء التربة والجيـولوجيا والجغرافيا في التعـبير عن ألوان التربة وتثبيت الصـفات اللونية بكل دقة. أطلس منسل هو فضاء لوني يحدد مقياس اللون مستنداً الى ثلاثة أنواع، بدأ العمل بهذا النظام في عام (1898م) ومن ثم نشره بالشكل النهائي عام (1905 م) . ويتكون اللون من ثلاثة عوامل هي:

ألوان الطيف الشمسي العاملة في تكوين اللون المستخدم بالخلط أو بالأستقلال، وهذه الظاهرة تعرف بـ الهيو (Hue).

شدة ألوان عناصر الطيف الشمسي وتسمى الفاليو (Value)، والإشارة هنا إلى درجة الدكانة.

مقدار الشوائب معبراً عنه بنسبة النقاوة وتسمى بالكروما (Chroma).

قام الباحث بتوزيع العينات على أطلس منسل للتعرف الى قيمها الرقمية وأصنافها إذ أظهرت نتائج الباحث أن أترب منطقة الدراسة تقع ضمن الصفحة (10 YR) كذلك شملت الصفحة (7.5 YR) بعضاً من عينات الترب فضلاً عن الصفحة (5 YR).
قراءة في أدلة الأحكام من كتاب (الأصول العامة للفقه المقارن) للسيد محمد تقي الحكيم
Authors: كاظم عزيز حسين
Published: February 2023

عدّ السيد الحكيم "رحمه الله "بمشروعه الثقافي الخيّر الموضوعية من المقومات التي يجب توفرها في الباحث المقارن، وان يلتزم بما أفرزته المقارنة من نتائج سواء كانت موافقة لما يملكه من مسبقات فكرية أو قد خالفتها.

وقد عني الماتن بوضع الأسس الصحيحة للفقه المقارن، كما اهتم بمعرفة أسباب اختلاف الفقهاء في الفروع الفقهية، إضافة إلى كونه مؤلفا أعطى مساحة كافية في التعرف على الآليات العامة للاستنباط التي يرتكز عليها عمل الأصولي.

وما مسعاه رحمه الله الاّ ضبط وتطوير المجالات العلمية والعملية في أصول الفقه المقارن، حيث تمكّن بخبرته العلمية ان يجعل فيه شمولية لمختلف المدارس مستثمرا الأهداف العلمية في إبعاد المناهج العاطفية في الإسهام بمعالجات اهم مسائل الفكر وخاصة المتعلقة أكثرها بالمهام العقدية.

فكان همّه ان يفعّل مجالات التلاقح الفكري بكل طاقاته مستثمرا عناصر التآخي والتأصيل الفكري للبيت النبوي.
المتضمّنات التداوليّة وأثرها في فهم الخطاب وتفسيره نماذج مختارة من كلام الإمام الحسن (عليه السلام)
Authors: منصور حسين محمد
Published: February 2023

يشكّل المصطلح التداوليّ الركن الأساس في تكوين المعرفة والثقافة البشريّة؛ لِما يقوم به من دور بارز في عمليّة التواصل بين أبناء الشعب الواحد من حيث لغة الخطاب المستعملة عندهم من جانب، والشعوب الأخرى من جانب آخر؛ حيث يعتمد أغلب الناس في العمليّة التواصليّة على الأساس التداوليّ للّغة ما يجعلهم مبتعدين في بعض الأحيان عن المعنى الحرفيّ للكلمة، ويُلمس هذا بخاصة في تعاملاتنا الخطابية اليومية؛ إذ يُعتمد على معانٍ تداوليّة تمثّل ارتكازًا وأساسًا فكريّا وأخلاقيّا في المجتمعات الانسانيّة، وبيان ذلك من خلال التركيز على بعض المفاهيم الأساس للمتضمّنات التداوليّة؛ والتي تقوم  بدور مهمّ في كشف مراد المتكلّم وتوضيح خطابه، ولِما لها علاقة وثيقة في ايجاد العمليّة التواصليّة بين المتكلم والمتلقي، والسعي لتوضيح تلك المفاهيم من خلال المقاربة التطبيقيّة على النصّ العربيّ الأصيل والمتمثّل بكلام الإمام الحسن (عليه السلام)، كما السعي لإيجاد جذور المتضمنات التداوليّة في التراث العربي من خلال بعض الصيغ التي تقوم بالوظيفة ذاتها، أو تشملها.
Problematising Value Retention for a Circular Economy: Dilemmas and New Value Balancing Principles
Authors: Lata Iulian Barba , Wiering Mark , Witjes Sjors
Published: February 2023

The circular economy is a viable alternative for our current economy; while scholarly work and policy documents problematise current principles and practices, the desirable changes are often treated as fitting in natural transition pathways. Until now, the circular economy has failed to realise its transformative potential, in practice representing at best a matter of laboriously weighing different and seemingly opposite sets of values. What are the building blocks in terms of value creation and retention, and how to upscale new value-balancing practices to a system level? This contribution problematises the concept of value in a fragmented circular transition landscape by drawing on narrative-based and transdisciplinary approaches, and their potential consequences for governing the circular economy.
Primer registro de Manicaria martiana Burret (Arecaceae) para el Perú, Distribución, Ecología y Etnobotánica
Authors: Grández-Rios César Augusto , Balsley Henrik , Pezo-Diaz Roberto , Loja-Herrera Berta
Published: February 2023

En el presente documento damos a conocer por primera vez a la palmera Manicaria martiana para la flora peruana, proveniente del río Motum, afluente del río Putumayo, en la zona noreste de la Amazonía Peruana (fronteriza con Colombia). Se estudiaron los registros de campo de estas áreas y otras colecciones depositadas en el Herbarium Amazonense (AMAZ) de la Universidad Nacional de la Amazonía Peruana. Con este nuevo reporte y una anterior de Manicaria saccifera Gartner, reportada en 1993, para el Perú se registra la presencia de las dos especies de Manicaria. Para ambas especies, se describen datos de distribución, hábitat, importancia ecológica, uso y manejo que le dan las comunidades de las etnias Muruy y Okaina en el Oriente peruano.
MINERAL DEPOSIT PLACEMENT IN THE OLIGOCENE-PLIOCENE SEDIMENTS OF THE TORGAI TROUGH AND THEIR PROSPECTS
Authors: Shamsutdin Dinmukhammed , Miniskul Shattyk , Assubayeva Saltanat , Omarova Gulnara , Kisseyeva Shyryn
Published: February 2023

The aim of this study is to determine the prospects of the region for the identification of new objects. For this purpose, it was necessary to solve the tasks of analyzing and summarizing all available geological data on the Torgai trough and based on this, to make forecast maps and determine the prospects for identifying deposits.
Analysis of extensive factual data and outcomes of the sedimentary cover minerals was followed by interpretation of sections at the basic outcrops and wells. All this work resulted in compilation of a new stratigraphic chart of Oligocene-Pliocene deposits of the Torgai trough (Northern Kazakhstan). The paragenetic connection of a number of minerals (placer gold of buried ancient valleys, oolitic brown-iron ores, zircon-rutileilmenite placers, brown coals and lignites) with the deposits was established, their distribution regularities were determined, and their prospects were assessed. This approach allows to plan geological exploration work to search for new mineral deposits.
Two structural complexes are distinguished in the section of the Torgai trough: complexly dislocated Precambrian and Paleozoic rocks that form the folded basement; and weakly dislocated Mesozoic and Cenozoic sediments that form the sedimentary cover. Features of the structure of Oligocene-Pliocene sedimentary basins of the Turgai Trough, lithological and facial composition of the strata composing them, and the minerals confined to them allowed to make prediction maps for promising types of minerals on the tectonic basis and to conduct systematics of minerals.
MORPHOLOGY AND WATER DYNAMICS OF CHANNEL BIFURCATION IN DELTAIC ENVIRONMENT
Authors: Dutu Florin , Dutu Laura , Catianis Irina , Iordache Gabriel
Published: February 2023

The study presents a detailed analyse of the morpho-dynamic processes of the main two bifurcations of the Danube River within its delta, at Ceatal Izmail and Ceatal St. George. The first bifurcation of the Danube, called Ceatal Izmail; here the river divides into two distributaries: a northern one, the Chilia (Kilia), and a southern one, the Tulcea. Forking to the right at Ceatal Izmail (Mile 43), the Tulcea distributary stretches further to 17 km to the second main hydrographic knot Ceatal Sfantu Gheorghe (St. George) at Mile 33.84 (km 62.2). Here, the Tulcea branch divides into two main distributaries: Sulina on the left and Sfantu Gheorghe (St. George) on the right. More than a century ago, these two bifurcations were submitted to hydro-technical works producing morphological changes of the fluvial bed, as well as redistribution of water and sediment flows between the three main distributaries. The history, morphology and hydrodynamics were studied in detail. On each bifurcation, hydrological, sedimentological and morphological measurements were performed on nine crosssections distributed upstream and downstream of the bifurcation in August 2021. The bifurcation angles, the slope, the flow separation zones and the velocities were investigated to understand the distribution of the water flow and bed morphology of both bifurcations.
THE STRUCTURAL AND TECTONIC POSITION OF KARST DEPOSITS OF LEAD AND ZINC IN THE GREATER KARATAU RIDGE (SOUTHERN KAZAKHSTAN)
Authors: Khodzhimuratova Assem , Muratkhanov Daulet , Temirkhanova Raushan , Aksholakov Yerlan , Uralbayev Yerbol
Published: February 2023

In recent years, the geological service of Kazakhstan has been assigned the task of searching for sites where ores would meet modern industrial requirements. It has become a matter of re-evaluation of lead-zinc deposits and of identification among them of promising non-traditional commercially genetic types. One of these is the karst type, which has the following features: high lead and zinc content, compact ore deposits, effective ore enrichment, wide development in Kazakhstan of carbonate rocks with lead-zinc mineralisation, potentially promising rich karst ores.
One of the regions in Kazakhstan with widespread development of the most favourable karst-forming carbonate rocks with numerous occurrences of stratified lead-zinc mineralisation and extensive development of both palaeokarst and modern karst is the Big Karatau. Lead-zinc deposits and ore occurrences represent the main group of ore formations for Karatau, which determine the metallogenic profile of the region.
A simpler approach to the identification of transverse zones was proposed using the lead geochemical field. The map of the lead geochemical field (figure) clearly shows that the individual anomalies are combined into zones with northwest and northeast extensions. We interpret the latter as stretching zones developing across the compression zones of the northwestern (Karatau) strike of the structures. Geochemical halos are formed by ore matter "flowing" from the compression zones into the extension zones.
CAVITY SIZE EFFECTS ON PLATE ANCHOR CAPACITY
Authors: Naji Ali , Mustatea Sebastian , Aziz Laith Jawad
Published: February 2023

Many reasons deform the cavity inside the soil. The reasons can be classified to two main reasons natural and artificial reasons. Natural reasons belong to the type of soil (It is usually due to materials that enter the formation of the soil and may be affected by natural factors). And artificial reasons due to human work inside the ground like old buildings. The size of these cavities effect on the capacity on structures and it can cause huge damages for the structures. Experimental study presents the effect of size of cavity on the capacity of the plate anchor. A scale model anchor plate embedded inside sandy soil in laboratory to study the behavior of it under the effect of three types of cavities with dimeter (10,15 and 20) cm. the results show direct effect on the capacity of plate anchor and the type of failure that deform inside the soil to resist the uplift loads.
ASPECTS OF EXPLOSION RISK ASSESSMENT FOR BELT CONVEYORS FOR BULK MATERIALS
Authors: Paraian Mihaela , Paun Florin Adrian , Jurca Adrian Marius , Mangu Sorin , Popa Mihai Catalin , Radu Mirela Ancuta
Published: February 2023

The processing, transport and storage of flammable materials in the form of dust generates an explosion risk due to the possibility of initiating potentially explosive atmospheres created by dust suspended in air with various ignition sources, some of which may be their own installations. As explosions can cause human casualties and severe property damage, the explosion risk assessment and the application of appropriate measures by manufacturers and users of installations to prevent the ignition of explosive atmospheres is of particular importance for the safety and health of persons and goods.
This paper deals with both technical and procedural aspects related to the risk assessment for belt conveyors for bulk materials, with reference to the requirements of European directives and applicable standards.
There are two European Directives, so-called ATEx Directives, which regulate the placing on the European market of products intended for use in potentially explosive atmospheres and their safe use: Directive 2014/34/EU and Directive 1999/92/EC. The paper presents some aspects regarding the border situations where the two directives apply, in the case of assemblies of equipment to be assessed by a manufacturer in accordance with the Directive 2014/34/EU for putting on the market and the installations that are equipment assembled by the user under his responsibility and have to be assessed by users in accordance with the Directive 1999/92/EC requirements.
RESEARCH ON THE ENVIRONMENTAL CONDITIONS OF STORAGE AND HANDLING OF EXPLOSIVE MATERIALS FOR CIVIL USE AND OF PYROTECHNIC ARTICLES WITH RESPECT TO THE SAFETY AND HEALTH OF PERSONAL AND HUMAN PERSONNEL
Authors: Ilici Stefan , Robert Laszlo , Rus Daniela Carmen , Miron Iuliana Claudia , Ilici Claudia-Raluca
Published: February 2023

The storage of explosives and pyrotechnic articles must be carried out in complete safety conditions and only in storage facilities (depots) arranged and authorized for this purpose. The legislation in force has strict provisions on the rules of explosive & pyrotechnics storage, handling and access in the storage facilities. Failure to comply with certain provisions of the law in the product safety data sheet prepared by the manufacturer may lead to the generation of hazardous situations which may result in very serious consequences such as explosion, fire, damage of constructions in the area and even damage to the environment. In the last years, in Romania there have been a series of accidents with victims or considerable material damage, these being as a result of actions of incorrect handling, storage, maintenance or failure to ensure the proper storage conditions accordingly with the specific legislation and technical recommendations. Following the results of this accidents, INSEMEX Petrosani as a research institute in mine safety but as well as notified body in the field of explosives, pyrotechnic articles & blasting techniques approval and certification, at the request of the authorities (Court, Prosecutor's Office, Police Office or State Labor Inspection) carried out several investigations in order to establish the causes that generated these events. The article presents some of outcomes of this investigations with the focus on recommendations to avoid similar events.
DISPERSION OF CARBON OXIDE IN CLOSED ENCLOSURES
Authors: Cioclea Doru , Chiuzan Emeric , Ianc Nicolae , Matei Adrian , Dragoescu Razvan
Published: February 2023

The carrying out of human activities of an industrial nature involves the use, handling or accidental presence of substances of a toxic nature such as carbon oxide. The presence of this gas in closed or semi-closed spaces can seriously affect the human body and when concentrations are high it can lead to death. Knowing how carbon oxide affects the human body and how it disperses into the air is very important for establishing preventive measures. Also, in order to establish the escape routes and the refuge areas, it is necessary to know the dispersion dynamics of carbon oxide both horizontally and vertically. The paper presents the experiment on establishing the dynamics dispersion of carbon oxide in a closed enclosure.
ESTIMATION AND ASSESSMENT OF THE RISK OF HUMAN ERROR IN THE APPLICATION OF THE FRAMEWORK METHOD OF EXPLOITATION WITH UNDERMINED COAL BANK
Authors: Enache Carla , Miclea Olga , Cucaila Marius , Cucaila Simona , Popescu Claudius
Published: February 2023

Because the occupational risk expressed the possibility of ending up in a (possible) danger of injury and/or occupational illness, it can represent a criterion of qualitative appreciation of the accomplishment of a human action, indicating how it may produce undesirable effects, materialized by human and material damage. The risk associated with a human action is determined by a multitude of risk factors, both of internal nature (manifested by human error) and of an external nature (technical equipment and related protection systems), which manifest themself in an organizational framework in which the executor carries out his activity, where the problem of risk perception has a dual character: the executor�s own risk versus the risk associated with human error. The human reasoning behind an action is generally based on at the mental level by each performer, the situation of a risky, complex or foreseeable damage action requiring a preliminary assessment of the occupational risk associated with that action. The paper highlights the results obtained based on the assessment of the risk associated with human error in the application of the framework method of exploitation with undermined coal bank, using a grapho-analytical model to estimate and assess the degree of global impairment (the severity of the maximum predictable consequence) and the corresponding probability, as a result of the verifying compliance of the conformity of the technical prescriptions for safety and health at work.
FEATURES OF OPTIMIZING THE CALENDAR SCHEDULE OF OPEN-PIT MINING BY STEEPLY INCLINED LAYERS
Authors: Moldabayev Serik , Sultanbekova Zhanat , Sarybayev Madiyar , Adil Tolegen , Akhmetova Madinur
Published: February 2023

The transition to mining benches with transverse panels from top to bottom within the boundaries of steeply inclined layers does not allow transforming the results of mininggeometric analysis sequentially for each individual stage of mining into a calendar schedule of mining operations. Therefore, a model is offered for converting the results of mining-geometric analysis into a calendar schedule of mining operations with sequential mining of benches from top to bottom using phased volumes of overburden rocks and ore reserves of adjacent steeply inclined layers. Each next stage of mining includes ore reserves of the previous steeply inclined layer and volumes of overburden rocks of the adjacent steeply inclined layer. In this case, the time of simultaneous mining of ore reserves and overburden in adjacent steeply inclined layers is assumed to be equal and should ensure the fulfillment of the annual design volumes of ore extraction. A reduction of overburden excavation, due to a significant increase in the slope angle of the pit walls of the steeply inclined layers, is achieved with the provision of independent high-rhythmic overburden and mining operations even on round shaped open pit fields. The studied technology of mining benches transverse panels in steeply inclined layers below the thickness of loose overburden rocks could improve technological development of deep and ultra-deep open pit mines, especially with combined motor-conveyor transport. Optimization of the calendar schedule of mining operations when mining rock overburden and ore with transverse panels in steeply inclined layers was performed at the ultra-deep Kacharsky open pit mine.
INCREASING THE EFFICIENCY OF DRILLING BIT USE IN HARD ROCKS BY HIGH-QUALITY PERFORMANCE OF A DIAMOND-CARRYING MATRIX
Authors: Ratov Boranbay , Fedorov Boris , Isonkin Alexander , Ibyldaev Murat , Borash Bokenbay
Published: February 2023

The work is devoted to the study of the effect of powdered WC monocarbide of different grain sizes, introduced into the composition of the binder of diamond grains of the composition 94 WC + 6Co + Cu in the manufacture of a diamond-bearing matrix of BS�NQ drill bits with a diameter of 75.6 mm, designed by ISM (Ukraine). The effectiveness of the mentioned crowns was evaluated according to the proposed indicator F= ( - mechanical drilling speed; h � the value of the deepening per single experience, � � linear wear of the matrix in height). Experimental drilling on granite blocks showed that with an increase in grain size from 80/63 to 200/600, the efficiency index increased by 1.9 times, and an increase in the percentage of monocarbide from 6% to 12% increased the F value by 10-12%. A further increase in grain size up to 250/200 caused a sharp decrease in the mentioned F index.
It has been theoretically and experimentally shown that the use of a "comb" profile of the working end of the matrix in the design significantly (by 2 times) increases the rate of destruction of the face in comparison with a rectangular end.
To further increase the efficiency of working on the destruction of the face, it is necessary to create diamond crowns, the matrix of which in height consists of several impregnated layers with a comb profile, separated from each other by layers of material of lower hardness (for example, VK-20).
PRESENTATION OF THE SAFETY AND PERFORMANCE PARAMETERS OF ELECTRONIC DETONATORS AND THE IGNITION SYSTEM
Authors: Jitea Ilie-Ciprian , Busoi Bogdan Garaliu , Laszlo Robert , Edward Gheorghiosu , Soysal Samet
Published: February 2023

DETEX Electronic Detonator made by Kirlioglu consists of an electronic circuit with communication and microprocessor and wire bridge resistance coated with explosive material. DETEX Electronic Detonator, which identity information, delay information, charge, discharge and all functions are controlled digitally, is a system consisting of all electronic circuit elements. The system consists of a communication circuit, a master control circuit with a microprocessor, a controlled charge, a discharge and an ignition circuit. With two cables, the circuit takes both the feed and the communication via the same two cables. With embedded software installed on the system, all functions are provided digitally via the microprocessor. DETEX Electronic Detonator can connect with Logger, Slave and Blaster in the field and significantly increases explosive performance due to its high accuracy and reliability fragmentation and material integrity, muck stack control (excavation rate and dust control), vibration control and repeatability. It can be remotely control a network with several explosion drives located in different parts of the mine, from a central location to simultaneously explode and it can use up to 1000 detonators when using a Single Blaster. The DETEX Electronic Detonator and Ignition System have the advantage in the case of any stray currents, electromagnetic interference, radar radiation or as well as its safety in the case of misfire. It cannot be fired simply by a battery or by other electric sources has a special secure encrypted communication protocol for both the ignition line control and the wired data transmission. In INSEMEX specialized department this product was tested with success in accordance with the requirements applicable and was certified for EU market.
PROVISIONS FOR CLEANING-UP DEEP ZONE OF OPEN PIT MINES USING LOADING DEVICES
Authors: Moldabayev Serik , Issakov Bakhytzhan , Sarybayev Nurzhigit , Nurmanova Assel , Akhmetkanov Dalelkhan
Published: February 2023

It is advisable to conduct mining operations in the conditions of the ultimate state of the opened massif with an increase in the pit wall slope angles below the limit of effective use of combined motor-conveyor transport in the cleaning-up zone of deep and ultradeep open pit mines to the final depth. Such a design of the pit walls is achieved when mining benches from top to bottom within the boundaries of steep-slope layers with the use of in-bench loaders in the cleaning-up zone. The conditions for the occurrence of irreversible shear deformations in rock layers and the position of the potential sliding surface with an increase in the pit walls slope angle of steeply inclined layers in the conditions of the ultra-deep Kachar iron ore open pit mine to critical values are established. It is advisable to use skips as the load-carrying body of the in-bench loader, the design of the supports of which allows it to be built with a lifting height of more than 30 m with the possibility of moving along the pit wall with variable berm elevations. The main provisions on the selection and justification of the expediency of using a loading device for operation in the deep zone are formulated based on the differentiation of the application zones of cyclic (motor transport) and cyclic and continuous method (combined motor-conveyor transport). In particular, the total costs of transporting rock mass according to the new scheme of combined in-pit transport with the use of a loading device for operation in the deep zone should be less than the costs of transportation according to existing or traditional schemes.
PUMPING UNIT EQUIPPED WITH OSCILLATING HYDRAULIC PRESSURE INTENSIFIER FOR CYLINDERS WITH SMALL OVERALL SIZES AND LARGE LOADS THROUGHOUT THE STROKE
Authors: Popescu Teodor Costinel , Chiri?a Alexandru-Polifron , Popescu Ana-Maria Carla , Vlad Andrei , Popescu Alina Iolanda
Published: February 2023

Conveyance of goods and travelling of persons through the tunnels of mines or subway is done on railways of narrow or normal gauge. In interventions in case of accidents, hydraulically operated installations with small dimensions are used for lifting and rerailing the derailed rolling stock. They include hydraulic jacks (double or single acting hydraulic cylinders), supplied with low flow rates at high pressures. Feeding of hydraulic cylinders for lifting and relocating the derailed rolling stock is usually done by means of high-pressure pumps, manually operated or driven by electric / thermal motors.
The authors propose the use of a more cost-effective pumping unit with low-pressure pump and oscillating hydraulic pressure intensifier for this kind of applications - and for similar ones that involve interventions in narrow workspaces.
Such pumping units are usually used in applications designed to achieve and maintain high pressures, either in the volumes of enclosed spaces (endurance tests for pipes and tanks) or at the active stroke end of hydraulic cylinders (hydraulic presses).
The authors demonstrate, on an experimental test bench, that the displacement of a highpressure hydraulic cylinder, with constant load over the entire stroke, can take place safely even if a low-pressure pumping unit, equipped with oscillating hydraulic pressure intensifier powers it.
RESULTS OF BELT CONVEYORS NOISE REDUCTION WITH THE NEW CONSTRUCTION OF ROLLER HOLDERS
Authors: Gondek Horst , Kolman Jiri , Bohac Daniel
Published: February 2023

Currently, one of the main problems in the extraction of useful minerals in term of environment is their transport in quarries. With the requirements to reduce the noise of the belt conveyor track, we were looking for a suitable solution to reduce it. So, we started thinking about attaching rollers made of a material other than steel.
The final solution was to insert classic rollers in polyurethane beds called suspension cartridge - which are roller holders made of polyurethane and reinforced with a steel liner to withstand loads, wear and other environmental influences.
This paper describes the development of cartridges. The solution must also take care about their complexity and production economics. The noise reduction also depends on hardness of the cartridges, so we made in 3 polyurethane hardness - 70 Shore, 80 Shore and 90 Shore.
The next part describes the testing machine that we have developed for test the noise of every type of cartridges. The purpose of the tests was to determine the sound pressure levels of the noise according to the used roller holders � classic and in the suspension cartridges with different shore. We can state that our design of the roller holders can reduce the sound pressure level by at least 2.3 dB for the softest cartridges. Although it may seem not much, but this value in mining conditions is, however, very good and in the case of further modifications of the cartridges, the achieved values could be even better.