bluuebunny/crossref_metadata_2025 huggingface dataset:
"Carbon Spectacular" - Exploring the Path to Enhance the Precision of Fiscal and Tax Support for Innovative Technologies in Energy Conservation and Emission Reduction
Authors: Amalia Shendy , Effendi Kharisya Ayu , Riantani Suskim
Published: July 2024

This research explores the impact of macroeconomic factors on the volatility of tin commodity futures contract prices, with a focus on inflation, interest rates and forward prices. The volatility of tin futures prices is important to investment strategies and risk management. Understanding the influence of these macroeconomic variables helps in making better investment decisions. The independent variables analyzed include inflation (X1), interest rates (X2), and forward prices (X3). Inflation reflects general price increases that can increase production costs and affect commodity prices. Interest rates are borrowing costs that influence investment decisions through the cost of capital. Forward prices reflect market expectations of future commodity prices. The dependent variable is the volatility of the tin commodity futures contract price (Y). This research methodology uses linear regression to analyze historical data from the three macroeconomic variables. Data is collected from economic reports, financial market data, and government publications. Analysis is carried out to determine the influence of each variable on futures price volatility. The research results show that inflation and forward prices have a significant influence on the volatility of tin futures contract prices, while interest rates have no significant influence. Increased inflation leads to increases in production costs and prices of goods, increasing future price uncertainty and volatility. High forward prices reflect expectations of future increases in commodity prices, which also increases volatility. Meanwhile, interest rates do not significantly affect borrowing costs, so they have no impact on futures contract price volatility.
The Impact of Macroeconomic Factors on the Volatility of Tin Commodity Futures Contract Prices: Empirical Study on Inflation, Interest Rates, and Forward Prices
Authors: Amalia Shendy , Effendi Kharisya Ayu , Riantani Suskim
Published: July 2024

This research explores the impact of macroeconomic factors on the volatility of tin commodity futures contract prices, with a focus on inflation, interest rates and forward prices. The volatility of tin futures prices is important to investment strategies and risk management. Understanding the influence of these macroeconomic variables helps in making better investment decisions. The independent variables analyzed include inflation (X1), interest rates (X2), and forward prices (X3). Inflation reflects general price increases that can increase production costs and affect commodity prices. Interest rates are borrowing costs that influence investment decisions through the cost of capital. Forward prices reflect market expectations of future commodity prices. The dependent variable is the volatility of the tin commodity futures contract price (Y). This research methodology uses linear regression to analyze historical data from the three macroeconomic variables. Data is collected from economic reports, financial market data, and government publications. Analysis is carried out to determine the influence of each variable on futures price volatility. The research results show that inflation and forward prices have a significant influence on the volatility of tin futures contract prices, while interest rates have no significant influence. Increased inflation leads to increases in production costs and prices of goods, increasing future price uncertainty and volatility. High forward prices reflect expectations of future increases in commodity prices, which also increases volatility. Meanwhile, interest rates do not significantly affect borrowing costs, so they have no impact on futures contract price volatility.
Optimizing Irrigation Canal Operations: Advanced Machine Learning Approach
Authors: PEng AFM Afzal Hossain
Published: July 2024

Efficient and equitable water distribution in large irrigation projects is crucial for sustainable agriculture. Inconsistent cross-regulator operations present significant challenges. We introduce an advanced quantitative model to standardize operations, ensuring reliable water supply management. We simulate numerous scenarios using the MIKE11 modeling system to generate extensive water level data. These data inform rule curves that define relationships between upstream and downstream water levels and discharge for specific gate settings. We validate these rule curves with field measurements. We also present the "Structure Operation System (SOS)," a tool that integrates data science and machine learning. This tool provides quick access to operational data, enhancing decision-making and improving irrigation efficiency. Our approach optimizes water management and promotes equitable access to water resources.
Minting Non-Fungible Tokens with Provably Fair Procedural Generation
Authors: Cotten Timothy Michael
Published: July 2024

Implementing provable fairness in the minting process of non-fungible tokens (NFTs) enables the procedural generation of NFT metadata that can be verified in a decentralized manner, even when stored off-chain. Until now, smart contracts have required additional on-chain data, such as integrity digests, to support the verification of off-chain NFT metadata. Due to the high costs of on-chain data storage, most NFTs do not implement such validation methods, reducing trust in the NFT's off-chain metadata and increasing reliance on centralization. We propose a new method, inspired by the virtual ecology design of sandbox massively multiplayer online role-playing games (MMORPGs). This method utilizes a 256-bit unsigned integer representing a seed value, a Web3-compatible implementation of a pseudorandom number generator (W3PRNG), and an executable ruleset containing attribute definitions and their probability spaces to procedurally generate NFTs. This methodology provides users with a provably fair way of generating NFTs in an open-ended minting smart contract by imitating Proof-of-Work mining, including an arbitrary amount of work to be performed while initializing the PRNG. Due to the extremely large state space of 2^256 possible seeds, any implementation makes the NFT's economy inherently inflationary, offering more attractive features and higher utility in Web3 and Metaverse design than existing fixed supply NFT collections. Furthermore, such a system implicitly guarantees the veracity of off-chain metadata based on the on-chain seed value and the smart contract's immutable integrity configuration. (First published to the Future of Gaming Discord community in November, 2022)
Finding the proof of the Riemann hypothesis
Authors: Wilson Jonathan Jared
Published: July 2024

This paper presents a comprehensive proof of the Riemann Hypothesis , one of the most significant unsolved problems in mathematics. By introducing the G¨odel-Mandelbrot Duality Theorem and the Topological Tensor Factorization Theorem, it achieves a new framework for under-standing the Riemann zeta function. This approach combines techniques from complex analysis, algebraic geometry, number theory, symplectic ge-ometry, and representation theory to provide a comprehensive view of the zeta function’s properties. It shows that the critical line Re(s) = 1/2 is a geometric invariant under the action of the symplectic group Sp(4, Z) and shows how the zeta function can be factorized into a tensor product of simpler functions. This factorization allows for the analysis of the dis-tribution of zeros in each component, ultimately leading to a proof of the Riemann Hypothesis. The proof includes rigorous verifications, extensive numerical support, and detailed error analysis.
Accountability of Fine Arts and Design Education Graduates in Indonesia in Responding to the Needs of the Job Market in the Second Decade of the 21st Century
Authors: Iswahyudi
Published: July 2024

The demand for an educated workforce is an interesting issue and needs to be discussed. Before the initiation of the link and match strategy, it seems that art education had made efforts to consider the outcomes of its graduates. Especially for art and design education, it is hoped that with the skills acquired, the graduates will be able to work directly in the formal and informal sectors. This is a further thought for the development of the independence of art and design education products. Basically, science and technology can consistently support art, especially for the development of its expression. With inward and outward-oriented development, which is based on the function of art education institutions and the challenges of external influences, art education should be able to solve various problems for the independence of its graduates. That is the alternative offered in this paper.
Do Infants Use Others’ Emotions in Social Interactions to Individuate Agents?
Authors: Woo Brandon Matthew , Ventura Andrea , Thomas Ashley J
Published: July 2024

This is an open file drawer report, inspired by Lindsey Powell’s lab (see https://socallab.ucsd.edu/papers/open-file-drawer). In this report, we describe an attempt to study whether infants come to represent agents, at least in part, based on their relationships with others.
Prospective Effects of Caregiver-Child Interaction on Changes in Developmental Personality Pathology During Adolescence
Authors: Krakau Lina , Silk Jennifer Susan , Do Quyen , James Kiera , Wright Aidan G.C. , Ladouceur Cecile D. , Kaurin Aleksandra
Published: July 2024

This study investigates the caregiver-child relationship as a proximal risk factor in the transactional development of youth personality pathology. Laboratory-based conflictual interactions between 129 girls (aged 11-13) and their caregivers were rated for positive and negative escalation, mutuality, relationship quality and satisfaction. Concurrently and two years later, girls' maladaptive traits were assessed via self- and caregiver-reports based on the DSM-5 Alternative Model for Personality Disorders (AMPD) domains (negative affect, detachment, antagonism, disinhibition, psychoticism). Using a series of path models, we assessed whether dyadic interactions predicted changes in self- and caregiver reported maladaptive traits. In dyads with reduced positive interaction patterns, particularly a lack of mutuality and relationship satisfaction, girls were characterized by elevated levels of negative affect, detachment, disinhibition, and psychoticism. These patterns were notably more consistent for girls’ self-reports. Patterns of negative escalation predicted self- and caregiver reported antagonism, but they were not linked to other maladaptive trait domains. The study illustrates the importance of the caregiver-child relationship in the etiology of developmental personality pathology by establishing a link between observed caregiver-child interactions and prospective changes in key domains of maladaptive traits. It expands the literature on dyadic interaction and developmental personality pathology to the dimensional framework of the AMPD.
Drawing the Lines of Fibromyalgia: A Mixed-Methods Approach to Mapping Body Image, Body Schema, and Emotions in Patient Subtypes
Authors: Swidrak Justyna
Published: July 2024

Fibromyalgia is characterized by widespread chronic pain and multiple additional symptoms which may result in significant disability. Recent studies have demonstrated disturbances in body image and body schema in people affected by this condition. Importantly, it is a heterogenous population in which distinct profiles can be identified based on physiological and/or psychological characteristics. The objective of our study was to explore individual differences in experiencing own body in fibromyalgia. We applied a mixed methods design and included data from 28 women diagnosed with fibromyalgia. We measured symptom intensity (Fibromyalgia Impact Questionnaire, part 1), disturbances in body schema (adapted Fremantle Back Awareness Questionnaire) and body image (Body Esteem Scale, Multidimensional Assessment of Interoceptive Awareness). Additionally, participants drew their bodies and how they experienced them (Body Drawing task). Next, we asked five experts in chronic pain treatment to evaluate the drawings on a specially designed scale and indicate what kind of emotions these drawings expressed. We found evidence of disturbed body experiences and large individual differences in each of the measured variables which allowed for clustering participants into three groups, named “Connected body”, “Conflicted body”, and “Disconnected body”. These preliminary results suggest patients with fibromyalgia may have both qualitatively and quantitatively distinct disrupted body experience.
Screening for carriers of the SRD5A2 gene mutation 5-alpha-reductase 2 deficiency in Vietnamese pregnant wome
Authors: Nguyen Thi Trang ,   Hanoi Medical University, 1 Ton That Tung Street, Trung Tu Ward, Dong Da District, Hanoi, Vietnam, Nguyen Doan Trang , Le Hoang Dan , Le Thi Ngoc Anh , Pham Quang Anh , Ngo Toan Anh , Nguyen Thanh Sang , Hoang Thai Thanh , Ha Huu Hao , Nguyen Duc Nhu , Do Thi Huyen Trang , Nguyen Thanh Tuan ,   Hanoi Medical University, 1 Ton That Tung Street, Trung Tu Ward, Dong Da District, Hanoi, Vietnam,   Hanoi Medical University, 1 Ton That Tung Street, Trung Tu Ward, Dong Da District, Hanoi, Vietnam,   Hanoi Medical University, 1 Ton That Tung Street, Trung Tu Ward, Dong Da District, Hanoi, Vietnam,   Thai Binh University of Medicine and Pharmacy, 373 Ly Bon Street, De Tham Ward, Thai Binh City, Thai Binh Province, Vietnam,   National Hospital of Obstetrics and Gynecology, 43 Trang Thi Street, Hang Bong Ward, Hoan Kiem District, Hanoi, Vietnam,   Thai Binh University of Medicine and Pharmacy, 373 Ly Bon Street, De Tham Ward, Thai Binh City, Thai Binh Province, Vietnam,   Institute of DNA Technology and Genetic Analysis, 112 Trung Kinh Street, Yen Hoa Ward, Cau Giay District, Hanoi, Vietnam,   Institute of DNA Technology and Genetic Analysis, 112 Trung Kinh Street, Yen Hoa Ward, Cau Giay District, Hanoi, Vietnam,   National Institute of Forensic Medicine, 41 Nguyen Dinh Chieu Street, Le Dai Hanh Ward, Hai Ba Trung District, Hanoi, Vietnam,   Hanoi Medical University, Thanh Hoa Branch, 722 Quang Trung Street, Dong Ve Ward, Thanh Hoa City, Thanh Hoa Province, Vietnam,   National Hospital of Obstetrics and Gynecology, 43 Trang Thi Street, Hang Bong Ward, Hoan Kiem District, Hanoi, Vietnam
Published: July 2024

Objective: To describe the percentage of people who carry the SRD5A2 gene mutation causing 5-alpha-reductase 2 deficiency and the characteristics of their mutated variants in Vietnamese pregnant women. Subjects and methods: A cross-sectional descriptive study was conducted on 8,464 pregnant women who visited and agreed to perform a screening test for gene carriers related to recessive genetic conditions at the Institute of DNA Technology and Genetic Analysis. All information about pregnant women including maternal age, gestational age, number of pregnancies and SRD5A2 gene mutation test results were collected. Results: Of 8,464 pregnant women participating in the study, 315 pregnant women (3.72%) carried pathogenic mutations on the SRD5A2gene. The c.680G>A mutation (p.Arg227Gln) is the most common of the SRD5A2 gene mutations detected. Conclusion: The rate of pregnant women carrying SRD5A2 gene mutations is 3.72%, indicating the high prevalence of this gene mutation in Vietnamese pregnant women. In the future, it is necessary to expand and develop SRD5A2 gene mutation screening programs in Vietnamese pregnant women.
Study on the preparation of green tea hand wash gel
Authors: Vu Van Tuan ,   Faculty of Pharmacy, Dai Nam University, 1 Xom Street, Phu Lam Ward, Ha Dong District, Hanoi, Vietnam, Vu Thi Huyen Trang , Trieu Thi Huong ,   Faculty of Pharmacy, Dai Nam University, 1 Xom Street, Phu Lam Ward, Ha Dong District, Hanoi, Vietnam,   Faculty of Pharmacy, Dai Nam University, 1 Xom Street, Phu Lam Ward, Ha Dong District, Hanoi, Vietnam
Published: July 2024

Green tea exhibits beneficial effects on the skin, such as deodorization, antibacterial properties, sun protection, and antioxidant activity. Formulating hand wash from green tea leverages these advantages in personal hygiene products. This study was conducted to investigate the ratios of surfactants, thickeners, and moisturizers in the formulation of hand wash gel containing green tea. Nine different formulations with surfactant ratios ranging from 9-15%, thickener ratios 1-2%, and moisturizer ratios 5-9% were examined. Sensory characteristics, pH, dirt dispersion ability, viscosity, foam height, and foam stability were evaluated to select the most appropriate formulation. The results showed that the F8 formulation had suitable sensory characteristics, a pH of 5.53, good dirt dispersion ability, a viscosity of 152.6 Cps, a foam height of 5.1 cm, and foam stability of 94.12%. According to Organisation for Economic Co-operation and Development (OECD) guidelines, the product did not exhibit skin irritation in tests conducted on rabbits.Thus, the optimal formulation for green tea hand wash gel was determined to include 1% green tea extract (dry extract form), 12% surfactant, 1.5% thickener, 7% moisturizer, other additives, and water to make up to 100%.
Evaluation of the characteristics of G1 genotypes in Tai Nguyen seasonal rice (Oryza sativa) in Tra Vinh province
Authors: Trinh Ngoc Ai ,   Tra Vinh University, 126 Nguyen Thien Thanh Street, Ward 5, Tra Vinh City, Tra Vinh Province, Vietnam, Nghi Khac Nhu , Nguyen Tan Thanh , La Cao Thang , Nguyen Tien Dung ,   Tra Vinh University, 126 Nguyen Thien Thanh Street, Ward 5, Tra Vinh City, Tra Vinh Province, Vietnam,   Tra Vinh University, 126 Nguyen Thien Thanh Street, Ward 5, Tra Vinh City, Tra Vinh Province, Vietnam,   College of Agriculture, Can Tho University, Campus II, 3/2 Street, Ninh Kieu District, Can Tho City, Vietnam,   Thai Nguyen University of Agriculture and Forestry, Thai Nguyen University, Quyet Thang Commune, Thai Nguyen City, Thai Nguyen Province, Vietnam
Published: July 2024

Tai Nguyen variety is a local seasonal rice variety, grown in some districts in Tra Vinh province. This rice variety has delicious rice and is highly adaptable to acidic and saline soils in the Mekong delta. Phenotypic variation of agronomic characters was investigated to eliminate the genetic diversity of the Tai Nguyen populations. Forty G1 individuals with the same maturing day and uniform agro-morphological characteristics were selected for G2 generation at 3 locations as Chau Thanh, Tra Cu and Cau Ngang of Tra Vinh province. The agronomic indexes of 40 Tai Nguyen rice lines in the G1 crop reached the following average values such as culm length 128.8 cm, number of branches 40.5, leaf length 53.4 cm, leaf width 1.0 cm, number of panicles 34.8, panicle length 24.7 cm, total number of firm seeds 134.3, total number of seeds 170.7, grain length 8.4 mm, grain width 2.4 mm, dry weight 193.0 g, and weight of 1000 grain 22.9 g. The comparison results have selected the 13 best G1 lines to be used as raw materials for the G2 crop
PERANCANGAN WEBSITE PENGELOLAAN DATA KARYAWAN UNTUK PENERAPAN KEBIJAKAN WFH PADA PT. MEDIA KOTAK PINTAR
Authors: Islamiatik Fena Ayu , Kurniawan Rudi
Published: July 2024

The research conducted at PT. Media Kotak Pintar highlights the challenges arising from the adoption of Work From Home (WFH) practices, which have not been fully addressed. The company faces difficulties in managing employee data, particularly in the manual and fragmented online leave request process across different platforms. Therefore, this study aims to design a web-based system to address these issues. The research methodology employed is Prototyping, involving stages such as needs identification, rapid design, prototype development, testing, and communication with users. Figma is used for designing the website interface, while MySQL serves as the database. The designed employee data management system encompasses attendance records, salary information, and leave requests. The system aims to facilitate employees in efficiently managing their data, expediting the leave request process, and ensuring data consistency. The implementation of this system is expected to enhance the efficiency of the HR department and provide a better experience for employees in managing their data and leave processes. This research is relevant in the context of evolving work dynamics during the pandemic, where WFH has become the norm.
Perancangan Sistem Informasi Penjualan Fashion Muslimah Berbasis Website Dengan Metode Waterfall
Authors: Rousyati Rousyati , Zahra Arvano Salma Fatimatus
Published: July 2024

Dalam era digital yang terus berkembang, teknologi informasi memainkan peran krusial dalam sektor bisnis, termasuk industri fashion muslimah yang semakin berkembang di pasar global. Untuk menghadapi permintaan yang terus meningkat, pelaku industri perlu mengadopsi solusi teknologi yang dapat meningkatkan efisiensi dan efektivitas operasional. Sistem informasi penjualan berbasis website merupakan salah satu solusi yang efektif, karena dapat mempermudah proses transaksi, memperbaiki interaksi dengan konsumen, serta memungkinkan analisis data penjualan secara real-time. Metode Waterfall, yang melibatkan tahapan sistematis seperti analisis kebutuhan, perancangan, implementasi, pengujian, dan pemeliharaan, telah terbukti efektif dalam pengembangan perangkat lunak. Metode ini diharapkan dapat membantu dalam perancangan sistem informasi yang terstruktur dan efisien untuk industri fashion muslimah. Penelitian sebelumnya menunjukkan bahwa penerapan sistem informasi berbasis web dapat meningkatkan efisiensi operasional dan kepuasan pelanggan. Artikel ini bertujuan untuk membahas perancangan sistem informasi penjualan fashion muslimah berbasis website dengan pendekatan metode Waterfall. Dengan membahas secara mendalam proses pengembangan sistem informasi, artikel ini bertujuan untuk memberikan pemahaman yang komprehensif mengenai implementasi sistem yang efektif dan sesuai dengan kebutuhan industri fashion muslimah.
 
Kata Kunci : Perancangan Sistem, Penjual Fashion, Metode Waterfall
ATTITUDES TOWARDS THE APPRAISAL OF ACADEMICS’ EMPLOYMENT PERFORMANCE IN PUBLIC UNIVERSITIES IN SRI LANKA
Authors: Kanthi Manel D.P.
Published: July 2024

This study examined the attitudes toward the performance appraisal of academics of public universities in Sri Lanka. The sample was selected using stratified and simple random sampling techniques. The sample size was 300 and it was allocated proportionately based on the designations of the teaching staff: Professor, Senior Lecturer and Lecturer. A questionnaire was used as a tool to gather the required data from the sample. The study employed a descriptive-analytical method and Principle Component Analysis (PCA) for analysing the quantitative data. According to the information which is sent by the respondents through open-ended questions of the questionnaires, the study revealed the need for a proper appraisal method to measure employee performance. Results of the descriptive analysis indicated the nature of the demographic characteristics of the respondents and their performance and achievements in the higher education field. Using PCA constructed three models for attitudes on existing methods related to promotion and motivation, socialization and orientation, and performance appraisal of academic staff members. Total variation of existing promotion and motivation methods, socialization, and orientation, the current performance appraisal method was described as 91.92%, 82.96%, and 94.13% respectively. The study concluded the importance of a proper appraisal method to measure the academic performances and administrative performance of members of the academic staff of the public universities in Sri Lanka.
THE IMPACT OF THE COVID-19 PANDEMIC AND ECONOMIC CRISIS ON THE PERFORMANCE OF LICENSED COMMERCIAL BANKS IN SRI LANKA
Authors: Samarasinghe S.L.G.M.M.  , Lakmal W.A.I.
Published: July 2024

Sri Lanka faced an array of incidents starting from the Easter Sunday attack in 2019 to COVID-19 pandemic and the Economic Crisis which caused disastrous effects on the economy. Despite the policy measure taken, the banking sector was severely affected by soaring Non-Performing Loans (NPLs) levels and dwindling profits. Therefore, the main objective of this study is to evaluate the impact created by the series of adverse economic and social issues from 2019 on the performance of the banking sector in terms of profitability and NPLs using a sample of 12 licensed commercial banks. The data were collected from secondary sources such as annual reports issued by the banks and the Central Bank for the period 2013-2022. The impact of the Easter attack, Pandemic, and Economic Crisis are referred to using a dummy variable, inflation, Gross Domestic Product (GDP) growth rate, and interest rate are used to measure the impact of the macroeconomic environment on the banking sector performance and capital adequacy ratio was used as a control variable. Return on Equity, Return on Assets, and NPLs were used to measure the bank's performance. The results of the random effects panel regression models suggest that there is a significant impact of the Pandemic, Economic Crisis, and GDP growth rate on the performance of the banking sector. This research indicates that a country like Sri Lanka needs to take aggressive policy measures to face these adverse situations. It is required to take credit risk mitigation measures and provide quality loans to curtail the adverse impact caused by the NPLs.
FACTORS AFFECTING WORK STRESS, SELF-EFFICACY, AND JOB PERFORMANCE OF BANKING OFFICERS IN KALMUNAI, AMPARA DISTRICT
Authors: Sifna M.S.F.S.  , Silva K.N.N.
Published: July 2024

Employee performance is significantly impacted by job stress and self-efficacy which has numerous practical and financial consequences. Self-efficacy is related to job performance, burnout, stress, and role adjustment. Self-efficacy may be regarded as a factor favorably influencing staff morale and, consequently productivity. One of the industries with the most stressful workplaces is the banking sector. Hence, this study aims to investigate how work stress and self-efficacy affect bank workers' performance. Data collection was done using thirty four banking employers in Kalmunai in the Ampara district using a structured questionnaire. Descriptive and non-parametric statistical analysis were used for the data analysis. According to the findings of this research, it can be observed that there is a positive correlation between self-efficacy and job performance and a negative correlation between work stress and job performance of employees. Hence, it can be concluded that self-efficacy has a direct impact on the improvement of job performance in any kind of profession while job stress inhibits job performance. Civil status, work experience, salary level, and number of dependents of bank employees have a high association with work stress and self-efficacy.
INHART's research landscape: A case study of trends and patterns (2008-2023)
Authors: Elgharbawy Amal A.M. Elgharbawy
Published: July 2024

This study thoroughly examines publication trends at INHART from 2008 to 2023, employing quantitative and qualitative methodologies to analyse the institute's thematic evolution and scholarly contributions. Results reveal a significant increase in publication volume and a strategic diversification of research topics over the examined period. In recent years, I have witnessed a focus on addressing complex issues such as "halal risk" and "halal critical points," which is indicative of INHART's responsiveness to emerging challenges in the global halal market. Furthermore, INHART's research trajectory aligns with broader sustainability goals and demonstrates proactive integration of advanced technologies. These findings highlight INHART's significant influence on halal practices and its potential to shape policy-making and societal well-being. The study concludes with recommendations for INHART to continue fostering interdisciplinary collaboration, expanding international partnerships, and prioritising educational initiatives to solidify further its impact in promoting ethical and sustainable practices within the halal industry.
GRAIN SORGHUM CULTIVATION ON ACID SOILS IN THE CONDITIONS OF THE TRANSCARPATIA REGION
Authors: Nehuliaieva N. ,   KarpatyAgroProduct LLC
Published: July 2024

The work aims to conduct production field research to determine the potential yield level of grain sorghum on acidic soils, as well as work out the generally accepted basic elements of cultivation technology with its subsequent cultivation in the Zakarpattia region. Materials and methods. In 2023, the production range for growing grain sorghum at Karpatiagroproduct LLC was located in the lowland zone of Uzhgorod district, Zakarpattia region. The article describes agrotechnical operations related to soil cultivation, application of fertilizers and plant protection products that were used in the farm, the main of which was the application of mineral fertilizer diammonium phosphate (NP 18:46) at the rate of 160 kg during sowing. The sowing rate was 165,000 seeds per hectare with a row width of 37 sm. Results. Sorghum is not picky about soils, so it can grow on both clay and sandy soils. The landfill where sorghum was grown is characterized by a low content of mobile phosphorus (6.33 mg/kg), a very low content of total nitrogen (N-NO3- + N-NH4+ – 8.92 mg/kg). According to the degree of acidity, the soil belongs to a very acidic soil (the hydrogen index of the saline extract of the soil is 4.08). In the economic conditions of 2023, the yield of sorghum grain hybrid Iceberg was 4.4 t/ha, which is 1.0 t/ha more than the average yield of sorghum in Ukraine over the past 10 years. Taking into account the genetic potential of this crop and the sufficient level of moisture supply of the territory, the level of the sorghum harvest should be twice as large. Because sorghum is not recommended to be grown on acidic, waterlogged soils with a close occurrence of groundwater, the underachieved level of the harvest to some extent may be related to this. In addition, the low content of mobile phosphorus and very low content of available nitrogen, which is characteristic of acidic clay soils, to some extent negatively affected the processes of crop yield formation. Conclusions. The obtained sorghum yield at Karpatiagroproduct LLC - 4.4 t/ha is lower than the average yield in Italy, by 2.6 t/ha, and in France - by 0.6 t/ha. However, it was in the territory of Ukraine that the record yield of sorghum in the world was obtained - 14.43 t/ha, which testifies to the high potential of grain sorghum and the unlimited potential of scientific and industrial research to reveal the genetic expression of this crop. Keywords: grain sorghum, yield, soil pH, «Iceberg» hybrid, agricultural technology.
APPLICATION OF THE OPERATIONAL METHOD OF DETERMINING THE TYPE AND QUANTITY OF WOOD HARVESTING MACHINES IN THE CONDITIONS OF SE «FORESTS OF UKRAINE»
Authors: Salo Ya. ,   Lviv branch of L. Pogorilyy UkrNDIPVT, Dumych V. , Machuga O. , Styranivskyi O. , Shevchenko N. , Gerys M. , Hromyak Yu. ,   Lviv branch of L. Pogorilyy UkrNDIPVT,   National Forestry University of Ukraine,   Western interregional management of forestry and hunting
Published: July 2024

The purpose of research: to determine the influence of different methods of sowing on the formation of seed yield and the efficiency of sunflower cultivation in the soil and climatic conditions of Western Ukraine. Methods. Field research was conducted in the soil and climatic conditions of Western Ukraine. The experimental field was characterized by sod deep clayey sandy soils. Two methods of sunflower sowing were studied: traditional with a row spacing of 70 cm using a «Gaspardo Renata R MTR 8» precision seeding vacuum planter and narrow-row sowing with a row spacing of 12.5 cm – the «Gaspardo Corona 600» seeding complex. During the research, the structural elements of sunflower seed productivity and the efficiency of two methods of sowing were estimated. Results: According to the research results it was established that in the variant with traditional sowing the average number of seeds in the basket was greater. The same trend was also observed concerning basket size, seed weight, and productivity of one plant, which made it possible to form a sunflower seed yield of 1.67 t/ha, which is 0.14 t/ha (by 9.1%) more than in the plot with narrow-row sowing. Direct operational use of technical means for performing technological operations of soil preparation, fertilizer application, and seed sowing in traditional sowing amounts to UAH 2,541/ha and is higher by UAH 667/ha compared to costs in the narrow-row variant. However, due to the higher yield in the version of traditional sowing, a higher income from the sale of seed was obtained by 1890 hryvnias/ha. Therefore, the effectiveness of the applied technical and technological solutions on the plot with traditional sowing amounted to 1223 hryvnias/ha. Conclusions. The «Gaspardo Corona 600» sowing complex can perform narrow-row sowing of sunflower seeds with the specified sowing rate in the conditions of Western Ukraine. Although a slightly lower yield was obtained in the variant with narrow-row sowing, direct operating costs for pre-sowing soil cultivation and sowing are lower than for technical and technological solutions for implementing traditional wide-row sowing. The results of using the «Gaspardo Corona 600» sowing complex for sunflower sowing can be useful for farmers when deciding to buy a row drill and save the financial resources of farms. Keywords: sunflower, methods of sowing seeds, row seeder, sowing complex, productivity, efficiency.
Assessment of the competitive position of a transport and logistics company in the market of freight forwarding services
Authors: Shpak Aleksandr Sergeevich
Published: July 2024

The problem of ensuring the company's competitive position in the market of transport and forwarding services is being updated by assessing external and internal factors for various models of the transport services market. Based on a competition analysis matrix for market segments of similar transport services, an assessment is made of the competitive position of a transport and logistics company operating in the Far Eastern Federal District.
Integration of geoelectric and electromagnetic methods to delineate subsurface mineralization in bostonite rocks, South El-Atshan area, Central Eastern Desert, Egypt
Authors: ABDELSALAM Hussein F. , YOUSEF Mohamed H. M. , SHAHEEN Mohamed A. , BADR Hassan M. , EL-HAWARY Ali M. , AL-ALFY Ibrahim M.
Published: July 2024

Bostonite rocks are widely spread in the Central Eastern Desert (CED) of Egypt, they are found in the form of sills or dykes injected in the Precambrian rocks. Postgeosynclinal (Hammamat) sediments were intruded by Postorogenic bostonites. The study of this area, using ground geophysical methods, aimed at tracking the radioactive mineralization under the surface, based on the possible association of this radioactive mineralization with some other mineralizations such as sulphides. The application of the self-potential survey shows that the highest negative anomalies are associated with the South El-Atshan bostonite sill and its contact zones. The depths to the centres of some selected anomalies range from 5.7 m to 24 m, half-widths oscillate from 6 to 32 m, with shallow dips towards the west and east directions. The horizontal-loop electromagnetic (HLEM) survey, which was conducted using four frequencies, revealed the presence of two conductive bodies. These conductive bodies possess narrow widths and depths, ranging from 25 m to 27 m, dipping towards the west direction with shallow angles of 25° and 40°, respectively. In addition, the induced polarization (IP) profile shows high chargeability values reaching more than 7.9 mV/V at depths starting from about 10 m to about 35 m. This zone corresponds to a high-resistance zone that may reflect a subsurface disseminated mineralization. The integration of the results obtained using the three techniques makes it possible to determine the most appropriate zones for the development of exploration in the area of investigation.
Optimasi AFR pada Gasoline Engine Menggunakan Sistem Controller pada Vehicle Speed Censor
Authors: Anindito Dhimas Cahyo , Hikmahtiar Muhammad Rasyid
Published: July 2024

The number of motorised vehicles has increased significantly in recent times. Derived petroleum products are still the main fuel for these internal combustion engines. But on the other hand, its availability is decreasing and its price is becoming increasingly expensive. This problem is the background to the importance of efforts to improve the efficiency of fuel consumption in motorised vehicles. One way to improve fuel efficiency is by increasing the optimisation of Air Fuel Ratio (AFR) with a control system. In this research, the control system used is an external engine control system (Honda Verza 150 FI) that works based on vehicle speed data. This control system works by resetting the fuel supply released when the motorbike decelerates so as to produce a better AFR value and more efficient fuel consumption. Based on the results of experimental tests conducted at 5 different deceleration speed variations (40 km/h, 50 km/h, 60 km/h, and 70 km/h) when using a modified ECU there is an increase in AFR value when compared to when using a standard ECU. The highest increase in AFR value occurs at a deceleration speed of 70 km/h with the AFR difference reaching 0.4 when compared to using the standard ECU. As for fuel consumption, the modified ECU is 150 cc more efficient than the standard ECU with the same test distance of 35.2 km
Pengaruh Interpass-temperature pada Pengelasan SMAW Terhadap Deformasi dan Kekuatan Impak Baja ASTM A36
Authors: Muhammail Muhammail , Saifudin Saifudin , Habibi Ilham
Published: July 2024

Currently, welding is still very necessary for the increasingly advanced development of technology in the construction sector because it plays an important role in metal engineering and maintenance. This research aims to determine the effect of interpass temperature on deformation of weld results in ASTM A36 steel material. The method used in this research is an experimental method by measuring the deformation of the welded specimen. There are 9 specimens, the welding process uses shielded metal arc welding (SMAW), direct current reverse polarity (DCRP) with interpass temperature variations of 75 °C, 100 °C and 150 °C. The measurement results show deformation values ​​of 2.2°, 3.5° and 4° for each of the interpass temperatures of 75 °C, 100 °C and 150 °C. From the results of impact testing on specimens with interpass temperatures of 75 °C and 100 °C, it shows mixed fracture, namely brittle fracture and ductile fracture. The results of impact testing on specimens with an interpass temperature of 150 °C showed brittle fracture. The highest strength was at interpass temperature specimen of 100 °C, that is 211.79 Joules. And the lowest impact strength occurred in the interpass temperature specimen at 150 °C, that is 183.16 Joules.
Pembelajaran Matematika Realistik Untuk Peningkatan Kemampuan Berpikir Kreatif Di SMK Kehutanan Negeri Makassar
Authors: Suaedy Nurdyanti , Dewi Hasma , Jusmiana Andi
Published: July 2024

Penelitian ini adalah penelitian tindakan kelas yang bertujuan peningkatan kemampuan berpikir kreatif dengan model pembelajaran matematika realistik. Teknik pengumpulan data melalui lembar observasi, tanggapan siswa, dan tes. Analisis data hasil penelitian yaitu data kuantitatif dan kualitatif. Hasil penelitian yang diperoleh (1) menunjukkan bahwa skor rata-rata siswa pada siklus I adalah 82,94 dan standar deviasi adalah 5,27.Pada siklus II adalah 91,73 dan standar deviasinya adalah 2,96. (2) Dari 34 orang siswa pada siklus I terdapat 11 siswa (32,35%) yang belum tuntas belajar dan 23 siswa (67,65%) yang telah tuntas belajar. Pada siklus II meningkat menjadi  34 siswa (100,00%) yang telah tuntas belajar.(3) Pada indikator kelancaran siklus I nilai rata-rata yaitu 70 dan siklus II meningkat menjadi 81 berada pada kategori tinggi, indikator keluwesan nilai rata-rata siklus I yaitu 69 berada dikategori sedang sedangkan silkus II nilai rata-rata meningkat menjadi 78 berada kategori tinggi, dan indikator keaslian nilai rata-rata siklus I yaitu 69 berada pada kategori sedang sedangkan nilai rata-rata pada siklus II yaitu 77 berada pada kategori tinggi. Secara umum dapat disimpulkan bahwa terjadi peningkatan kemampuan berpikir kreatif dan hasil belajar matematika juga akan meningkat selain itu, siswa belajar secara berkelompok pada siklus II, yang sebelumnya belajar secara individu pada siklus I.
Speed Sensorless Control Based Artificial Neural Network for Direct Current Motor
Authors: Dr. Adel M. Dakhil  , Dr. Basil H. Jasim
Published: July 2024

In this paper, A robust adaptive speed sensorless by a neural network approach of a separately excited (DC) motor without the use of speed sensors is presented.The simulation carried out by Matlab backage. The actual speed is estimated using a feed-forward neural network, the neural estimator have three inputs which are armature current, armature voltage, and the speed in the previous step of time; and one output which represents the estimated speed. The obtained results are presented to show the validity and efficiency of sensorless control scheme, which in turn obtains high performances.
Effect of silica fume on the mechanical properties of crushed brick concrete
Authors: Ghanim Mohammed Kamil
Published: July 2024

This paper presents an experimental investigation on the effect of silica fume on the mechanical properties of concrete obtained by replacing 50% of weight of stone aggregate by crushed clay-brick. The only variable considered in this study was the dosage of silica which it is a percent of cement weight, the percent values of replacement silica fume are (0%, 2%, 4%, 6%, and 8%) of cement weight. The comparative study is focus on the effect of the silica fume on this type of concrete not the effect of replacement of crushed brick. The added silica fume has active effect on the strength of crushed brick concrete. The effect of using silica fume on compressive strength is different for the different replacement of silica fume and it is more active for the 2% replacement at 7 days age, while the replacement that yield best enhancement at 28 days is 4%. The compressive strength for 28 days age is about 27.5 MPa,29.5 MPa, 38.5 MPa,31.4MPa, and 10MPa,for (0%, 2%,4%,6%, and8%) of replacement silica percent .Further more the best increasing in tensile strength is at 2%while there is a small gradually increasing in gain in modulus of rupture with using silica fume until 6%, which beyond the least value it starts to drop.The high level which is observed in this study beyond 6% reduces the gain in strength of compressive at 28 days and it gets a compressive strength less than the control value at 7 days. Furthermore it gets a reduction in tensile strength and modulus of rupturein at 28 days.
Durability of Concrete Incorporating Corrosion Inhibitors Exposed to a Salt Solution of CL - +SO 4 -2
Authors: Majeed Oleiwi Hayder
Published: July 2024

Laboratory investigations were performed in order to assess the effectiveness of three types of inhibitors, calcium nitrite, ethanolamine and Sika ferro gard 901(commercial inhibitor) with 1%, 2% and 3% concentration by weight of cement for each inhibitor to retarding corrosion of steel embedded in concrete. Concrete specimens were used to assess the effects of corrosion inhibitors on the compressive and tensile strength of concrete and corrosion of reinforcement.Some of the specimens were subjected to wetting and drying cycles and reinforcement corrosion was evaluated by measuring corrosion potentials and corrosion current density. Other concrete specimens were immersed in the salt (Cl-+So3-2) solution and reinforcement corrosion was accelerated by impressing an anodic potential of +12 V from a DC power supply and measuring the time-to-cracking of the concrete specimens.The results indicated that the concrete specimens incorporated corrosion inhibitors of calcium nitrite and Sika ferro gard 901 did not adversely affect the compressive and tensile strength of concrete. Furthermore, the time-to-cracking in specimens contains those two inhibitors (calcium nitrite and Sika ferro gard 901) were higher. Two percent of calcium nitrite followed by three percent of Sika ferro gard 901 were efficient in delaying the initiation of reinforcement corrosion and reducing the rate of reinforcement corrosion current density in the concrete specimens, while all the percentages of ethanolamine corrosion inhibitor were ineffective to delay corrosion of the rebar under the conditions of the study and it's adversely affect the strength.
Application Of Artificial Neural Network Models For Predicting Total Dissolved Solids In Marsh Water
Authors: D. Salman Mohammed
Published: July 2024

In this paper an Artificial Neural Networks (ANNS) model is designed to predict the Total Dissolved Solids (TDS) concentration in marsh water. A previous data set are selected from previous studies which done on analysis of marsh water quality, these data are arranged in a format of five input parameters to feed forword back-propagation including the acidity (pH), calcium concentration (C), Magnesium Concentration (M) , Chloride Concentration (Cl) and Sulphate Concentration (S), and one output parameter as Total Dissolved Solids concentration. Artificial Neural Network used to study the effect of each parameter on TDS concentration in marsh water. Several structures of ANNs model is examined with different transfer functions, activation functions, number of neurons in each hidden layer and number of hidden layers. Results show that the two hidden layer network with transfer function (trainscg) with (12 & 10) neurons in the first and second hidden layer respectively and (tansig-tansig-purelin) gives the best performance (Mean Square Error: 3.05e-5) network for this prediction.
SIMULATION OF LAMINAR FORCED CONVECTION HEAT TRANSFER AND FLUID FLOW OVER A BACKWARD FACING STEP WITH OBSTACLE USING (SIO ) NANOPARTICLES
Authors: Saad Kamel Mohammed , Khafeef Obaid Albdoor Ahmed
Published: July 2024

Simulation of Heat transfer and laminar Sio2/water and Sio2/oil-engine flow over backward facing step with and without obstacle numerically studied in this paper. The finite volume method adopted to solve continuity,momentum and energy equations in two dimensions. The aspect ratio of triangular obstaclew/e= 0.5 presented.The step height and expansion ratio of channel were 4.8mm and 2 respectively, the range of Reynolds number varied from 100 to 250, constant heat flux subjected on downstream of wall was 2000W/m2.Two types of base fluid used in this simulation the water and oil-engine with constant properties at T = 300K°, The Sio2nanoparticles used with nanoparticles diameter 30nm and volume friction 4%. The average nusselt number noticed increase with increase Reynolds number withobstaclefor two basefluid and also noticed that the nanofluid of Sio2-oil engine has higher nusselt number compared with other nonofluid. The result shows increase of local nusselt numberfor backward facing step with obstacle in compared to those without obstacle. The maximum enhancement of heat transfer observed at obstacle due to increase recirculation flow after the obstacle. Streamline showing the increase of recirculation region with used obstacle in compared without obstacle and highest recirculation region observed at obstacle.