bluuebunny/crossref_metadata_2025 huggingface dataset:
PERFORMANCE EVALUATION OF NATURAL CONVECTION INDIRECT SOLAR DRYER FOR DRYING WHITE YAM SLICES
Authors: Braihma Y. , Yola I. A.
Published: July 2023

This paper presents the performance evaluation of a natural convection indirect solar dryer for drying white yam. Drying is the process of removing enough moisture from food to prevent decay and spoilage. Large quantity of yams are produced, therefore, there is need for drying the yams to minimize wastage. This study mainly tried to solve the problem of post harvest-loss using natural convection indirect solar dryer for drying white yam. The dryer was made from plywood with 10 mm thickness and consists of a solar collector and drying chamber which houses three trays with an upper vent for the exit of air. The result of no load showed that the dryer temperature could rise up to 60 . The average collector temperatures recorded from no load tests were 71.1 oC and 75.11 oC. The collector efficiency was found to be 53.1  and dryer efficiency was 10.5 . The drying rates for the load tests were found to be 0.081 kg/hr and 0.095 kg/hr. It was found that, the required 7.6% moisture content was obtained within 18 hours of drying. Therefore, farm products with an initial moisture content of 71.3% can be dried using this dryer.
EXPLORING THE DYNAMICS OF AN EXOTHERMIC CHEMICAL REACTION CONTROLLED BY ARRHENIUS KINETICS WITH HALL EFFECT IN A MICROCHANNEL
Authors: Hamza M. M. , Ahmad S. K. , Ojemeri Godwin , Usman H. , Shuaibu A.
Published: July 2023

The consequences of chemically reactive fluids have provoked many researchers due to their potential to enhance the behavior of heat. Hence, this article discussed a theoretical investigation to explore the actions of Arrhenius chemical reaction and Hall current on hydro-magnetic free convection of a viscous fluid flowing along an upstanding micro-channel. Subject to the required boundary conditions, the governing coupled equations representing the flow pattern in non-dimensional form were solved using the homotopy perturbation method (HPM). Line graphs are also used to generate expressions for energy, momentum, volume flow rate, drag force, and Nusselt number in both primary and secondary flow directions as a function of regulating parameters like chemical reaction, Hall current, rarefaction, and wall ambient temperature difference ratio. It is worthy of note that the fluid temperature and the fluid flow are substantially propelled by the viscous heating term in the Arrhenius chemical reaction of the system for growing values of the wall ambient temperature difference ratio parameter. Additionally, it is noticeable that volume flow rate performance is seen as a growing influence of viscous heating and rarefaction parameters. The findings of this study can be applied to a wide range of electrically controlled devices, thermal and petro chemical engineering, and the serviceability of industrial products.
PREVALENCE OF INTESTINAL PARASITIC INFECTIONS AMONG INTERNALLY DISPLACED PERSON’S AND HOST COMMUNITIES IN MUBI NORTH LOCAL GOVERNMENT AREA, ADAMAWA STATE, NIGERIA
Authors: Pukuma M. S. , Augustine M. L. , Enoch N.
Published: July 2023

A study on the Prevalence of Intestinal Parasitic Infections was carried out among Internally Displaced Persons and the host community in Mubi North Local Government Area of Adamawa State. 400 stool samples were collected from three communities namely, Barama,Yelwa and Wuro Hande. The Stool samples was processed using formol ether concentration technique and examined under microscope for the cyst of parasites with the aid of identification manual..121 were infected with a Prevalence rate of (30.3%). Eight Parasites species were encountered namely, Ascaris lumbricoides(36.1%), Schistosoma mansoni (22.5%), Ancylostoma duodenale (12.6%), Entamoeba histolytica (5.3%), Hymenolepis nana (2.6%), Enterobius vermicularis (3.0%), Entamoeba coli (6.0%) and Giardia lamblia (7.0%.). Ascaris lumbricoides was the most prevalent parasite while Hymenolepis nana was the least encountered. Internally Displaced Persons were more infected (34.5%) compared to the host community (26.0%), though statistically not significant P>0.05. Males were more infected among the IDPs (41.1%) than females 29.1%, while females (27.2%) were more infected than males (24.4%) in the host communities.. The study showed that infection was wide spread within the communities irrespective of settlement status. This could be attributed to poor personal hygiene, and indiscriminate dumping of waste, coupled with  the challenges of  portable water supply. There is the need for improvement in the availability of portable water supply and proper waste management in mubi and environs.
ASSESSMENT OF WILDLIFE DISTRIBUTION IN RELATION TO WATERHOLES IN MARGUBA RANGE OF OLD OYO NATIONAL PARK, NIGERIA
Authors: Onihunwa J. O. , Akande Olalekan A. , Mohammed H. L. , Joshua D. A.
Published: July 2023

This study assessed wildlife distribution in relation to waterholes in Marguba range of Old Oyo National Park, Nigeria.  It involved Observations, Identification and Counting of different wildlife species utilizing each of the waterholes in the Park. Data obtained was analyzed using descriptive statistics. Four (4) waterholes are recorded in the Park (Oopo River, Ogun River, Ayinta River and Ibuya River). The frequency distribution of herbivores species observed around the waterholes revealed that Ogun River recorded no herbivores. Also Kob recorded the highest number of observation with 7 individuals, follows by Roan antelope with 4 individuals while Red flanked Duiker, Waterbuck and Western hartebeest recorded 1 individual each. The frequency distribution of non-human primates species observed around the waterholes, Oopo and Ayinta River recorded no observation. Ibuya recorded the highest number with 4 individuals while Ogun recorded 2 individuals. The frequency distribution of amphibians/reptiles’ species observed around the waterholes, Ibuya recorded the highest number with 11 individuals, followed by Oopo River with 3 observations while Ogun and Ayinta recorded 1 individual each. Also Frog (Rana sp) recorded the highest with 7 individuals. The animal indices around the waterholes showed that herbivores recorded the highest with 48.35, followed by Amphibian/Reptile with 31.0% while Non-human primates is the least with 20.7%. The study recommends that provision of functional artificial waterholes in the park should be established.
Potensi Oleoresin Gulma Daun Siam (Chromolaena odorata) pada Mortalitas Hama Lalat Buah (Bactrocera cucurbitae) pada Uji in-vitro
Authors: Ropalia Ropalia , Apriyadi Rion , Yurenza Nadia
Published: July 2023

Fruit flies are the main pests that attack various types of fruit vegetables and fruits that can caused a damage in the quality and quantity of production. Fruit flies controlling by chemical insecticides is common to use nowadays, but excessive use of chemical insecticides has a negative impact on the health and environment. One alternative to control the fruit flies is using oleoresins of Chromolaena odorata leaf. This study aims to determine the effect of C. Odorata leaf oleoresin on increasing the mortality of fruit fly pests (Bactrocera cucurbitae). This research used an experimental method with Completely Randomized Design (CRD) which had 6 treatment levels, namely: N0 (Aquadest), N1 (Oleoresins 2%), N2 (Oleoresins 4%), N3 (Oleoresins 6%), N4 (Oleoresins 8%), N5 (Oleoresins 10%), was replicated 4 times so there were 24 experimental units. The results showed that the application of C. Odorata leaf oleoresin had no sigificant effect on mortality percentage and mortality rates, but oleoresin had the potential to increasing fruit fly mortality as concentrations increased.  It is necessary to test the increasing concentration of oleoresin > 10% to control fruit fly pests.
Karakteristik Berbagai Formulasi Mikroorganisme Lokal (MOL) dan Pengaruhnya terhadap Pertumbuhan Tanaman Kangkung Darat (Ipomoea reptans (L.) Poir)
Authors: Swandi Monica Kharisma , Jeniver Jely , Nur Milah Siti Ade , Safitri Mutiara , Asyyifa Inayah , Irawati Irawati , Aliya Putri , Khotimah Khusnul , Sari Astri Dian , Putri Julian Eka , Sari Nadila Puspita , Fatansyah Firzan , Harita Efita Karunia , Wiriyanti Lesta Ayu , Indah Suryani Putri Ayu
Published: July 2023

Mikroorganisme lokal (MOL) berisikan larutan hasil fermentasi berbahan dasar dari berbagai sumber daya lokal. Larutan MOL berpotensi dijadikan pupuk organik cair karena mengandung mikroorganisme yang dapat meningkatkan pertumbuhan tanaman. Penelitian ini bertujuan mengetahui karakteristik MOL berdasarkan sumber mikroorganisme yang berbeda yang didapat dari bahan pangan khas Bangka Belitung, serta mengetahui efektivitasnya terhadap pertumbuhan tanaman kangkung darat. Penelitian eksperimen ini menggunakan rancangan acak lengkap (RAL) dua faktorial yaitu jenis MOL (tanpa pemberian MOL (M0), MOL berbahan terasi Bangka (M1), MOL berbahan rusip (M2), dan MOL berbahan sampah dapur (M3)) dan dosis MOL (0% (D0), 15% (D1), 25% (D2), dan 50% (D3)). Masing-masing perlakuan dilakukan sebanyak 2 kali ulangan dengan total 32 unit percobaan. Variabel yang diamati yaitu karakteristik MOL setelah 1 minggu inkubasi dan pengaruh pemberian MOL terhadap pertumbuhan tanaman kangkung darat 14 hari setelah tanam (HST). Data dianalisis secara statistik menggunakan software SPSS versi 25 dengan menggunakan metode analysis of varian (ANOVA) dan uji lanjut duncan’s multiple range test (DMRT) dengan taraf kepercayaan 95%. Hasil penelitian didapatkan semua perlakuan MOL behasil terfermentasi dengan karakteristik beraroma asam, tekstur cair, terdapat gelembung udara, pH asam, dan terdapat bakteri dan kapang. Hasil ANOVA menunjukkan faktor pemberian jenis MOL dan faktor interaksi jenis MOL dan dosis MOL berpengaruh nyata terhadap semua parameter pengamatan. Namun pemberian faktor dosis MOL tidak berpengaruh nyata terhadap semua parameter pengamatan. Perlakuan jenis dan dosis MOL M2D1 dapat meningkatkan respon jumlah daun, bobot basah tanaman, bobot kering tanaman, bobot kering tajuk, dan bobot kering akar tanaman kangkung darat. Sedangkan perlakuan M1D3 meningkatkan respon tinggi tanaman kangkung darat.
Enhancing the Efficiency of Diabetes Prediction through Training and Classification using PCA and LR Model
Authors: Belgaum Mohammad Riyaz , Charitha Telugu Harsha , Harini Munurathi , Anusha Bylla , Sai Ala Jayasri , Yadav Undralla Chandana , Alansari Zainab
Published: July 2023

In this paper, we introduce a new approach for predicting the risk of diabetes using a combination of Principal Component Analysis (PCA) and Logistic Regression (LR). Our method offers a unique solution that could lead to more accurate and efficient predictions of diabetes risk. To develop an effective model for predicting diabetes, it is important to consider various clinical and demographic factors contributing to the disease's development. This approach typically involves training the model on a large dataset that includes these factors. By doing so, we can better understand how different characteristics can impact the development of diabetes and create more accurate predictions for individuals at risk. The PCA method is employed to reduce the dataset's dimensions and augment the model's computational efficacy. The LR model then classifies patients into diabetic or non-diabetic groups. Accuracy, precision, recall, the F1-score, and the area under the ROC curve (AUC) are only a few of the indicators used to evaluate the performance of the proposed model. Pima Indian Diabetes Data (PIDD) is used to evaluate the model, and the results demonstrate a significant improvement over the state-of-the-art methods. The proposed model presents an efficient and effective method for predicting diabetes risk that may have significant implications for improving healthcare outcomes and reducing healthcare costs. The proposed PCA-LR model outperforms other algorithms, such as SVM and RF, especially in terms of accuracy, while optimizing computational complexity. This approach can potentially provide a practical and efficient solution for large-scale diabetes screening programs.
GreenPy: Evaluating Application-Level Energy Efficiency in Python for Green Computing
Authors: Reya Nurzihan Fatema , Ahmed Abtahi , Zaman Tashfia , Islam Md. Motaharul
Published: July 2023

The increased use of software applications has resulted in a surge in energy demand, particularly in data centers and IT infrastructures. As global energy consumption is projected to surpass supply by 2030, the need to optimize energy consumption in programming has become imperative. Our study explores the energy efficiency of various coding patterns and techniques in Python, with the objective of guiding programmers to a more informed and energy-conscious coding practices. The research investigates the energy consumption of a comprehensive range of topics, including data initialization, access patterns, structures, string formatting, sorting algorithms, dynamic programming and performance comparisons between NumPy and Pandas, and personal computers versus cloud computing. The major findings of our research include the advantages of using efficient data structures, the benefits of dynamic programming in certain scenarios that saves up to 0.128J of energy, and the energy efficiency of NumPy over Pandas for numerical calculations. Additionally, the study also shows that assignment operator, sequential read, sequential write and string concatenation are 2.2 times, 1.05 times, 1.3 times and 1.01 times more energy-efficient choices, respectively, compared to their alternatives for data initialization, data access patterns, and string formatting. Our findings offer guidance for developers to optimize code for energy efficiency and inspire sustainable software development practices, contributing to a greener computing industry.
Antinatalism, Hannah Arendt's Natality and a Matahuman vita contemplativa
Authors: Wolf Philipp
Published: July 2023

Adopting a hybrid, creative-critical approach, this article explores how Rosi Braidotti’s notion of posthuman subjectivity based on a negotiation between humans, zoe (nonhumans), geo (earth) and techno (technologies) can be put into practice creatively. Against the background of the low-lying South Holland coast, where sandscapes based on human-nonhuman collaborations prevent coastal erosion, I trace the various voices in the landscape complementing and interrupting each other. Shifting from a human perspective into the perspectives of zoe, geo and techno, the narration of this piece finally coalesces to form a new ‘we’ which represents this posthuman subjectivity. Imagining alternate futures based on this inclusive ‘we,’ this piece explores what a collaboration based on a collective posthuman subjectivity can mean in practice. Moreover, it demonstrates the potential of experiments in form and style to make tangible theoretical insights from posthuman scholarship, introducing an innovative approach that bridges the gap between academic and creative writing.
Metahuman Studies, Choral Ontopolitics and Earth Liberation
Authors: Del Val Jaime
Published: July 2023

Metahumanism is presented as an evolution from critical posthumanism both in terms of an intensified critique of the Planetary Holocaust and of a radical pragmatics of becoming based on a movement philosophy which has diverse precursors back to the pre-Socratics and beyond. Metahuman studies and its critical counterpart in Trash-human studies is the corresponding studies field promoted by the Metahuman Futures Forum, an alternative whose urgency is justified due to the prevailing human supremacism in other existing intellectual and activist milieus, and which culminates in the performative proposal for a ‘Trial against Humanity’. A choral politics of moving bodies is introduced through the Vision Statement of the Bodynet-Khorós EU project, aiming at a liberation of al life forms from human dominion and its extinction loop, for a metahuman r/evolution.
“Loneliness and the void”: exploring different types of aloneness and the lack of benign internal objects
Authors: Wright Susan
Published: July 2023

Health experts have suggested that we face an epidemic of loneliness in the westernised world. But what do we mean by loneliness? In this article I explore what leads to states of chronic loneliness, the language people use to describe it—if they can, and why it is that some people savour solitude and others fear it. Here my thesis is that the former have benign internal objects to draw on, and this opens space for creativity and the imagination whereas the latter experience an inner void. I talk about the early experiences that contribute to feeling lonely, even when people are around, and to an inability to internalise supportive others. The article also includes a section on the connections between loneliness and shame. At the end I discuss what a therapeutic relationship, and in particular one grounded in a deep understanding of what being alone means to the therapist, can offer so that people suffering acute aloneness can move from fearing being on their own to valuing the transitional space of having time to themselves.
“Our time is up”: a patient’s perspective on psychotherapist retirement
Authors: Straforini Carol Morrison
Published: July 2023

Organic terminations in a “good-enough” treatment at their best end with feelings of warmth, pride, sadness, and a letting go. Psychotherapist retirement, however, is a unilateral ending imposed upon patients, sometimes causing not only feelings of loss and hurt, but bringing about damage, breaching the age-old mandate of the Hippocratic oath: “First, do no harm”. Yet, humans can avoid ageing only by early death. They retire, sometimes forced by necessities, sometimes beckoned by a readiness for a final life chapter filled in ways that do not include professional work. Some hurts, even harm, may be unavoidable. Despite a growing literature on the topic of psychotherapist retirement, the first-hand perspective of the retired-upon patient is as yet without a public voice. A retired psycho-dynamic psychotherapist myself, in this article I share my experience as a patient who lost a much-loved therapist to retirement. I write with a patient’s heart informed by a practitioner’s eyes, ending with suggestions for both members of the therapeutic dyad and also for the professional community.
Theoretical Approach to Territorial Development and Socioeconomic Vulnerability in the Agricultural Sector to Suport Agroturism
Authors: Lisbet Eunice Pérez Anzardo  , Irina Reyes Martínez  , Yunisleydis García Ramírez  , Yanet González Pérez
Published: July 2023

The agricultural and productive impulse in general is an inseparable part of territorial development and therefore of human progress. By the way, the Guidelines and the Economic and Social Policy of the Party and the Revolution, approved in the VIII Congress of the Communist Party of Cuba, are strategies proposed to guide the socioeconomic management of the country. The following article shows a reflection on the fundamental concepts and trends related to territorial development and socioeconomic vulnerability in the agricultural sector in a way that facilitates its correct operation of agroturism and guarantees sustainable development. Theoretical methods were used such as analysis and synthesis, historical-logical, structural systemic; and empirical ones such as scientific observation, interviews, study of normative documents, among others. As a result, the foundations were laid for the theoretical-practical deepening of the research and a group of conditions are exposed that allow the identification of socioeconomic vulnerability in the agricultural sector as a decisive factor for sustainable territorial development for planning agroturism. From the reflection carried out in this study and from both the theoretical and practical contribution, the need to identify socioeconomic vulnerability in the agricultural sector is demonstrated in order to achieve sustainability of agricultural businesses, as well as economic and social regeneration of the territory in question. harmony with the environment; anywhere in the world.
Study of cellulose additive effect on the caking properties of coal
Authors: Koveria Andrii , Kieush Lina , Usenko Andrii , Sova Artem
Published: July 2023

Purpose. The work aims to study the effect of cellulose on the caking properties of various types of coking coal used in coking blends. The change in caking abilities has been analyzed to achieve the aim using standard techniques. At the same time, the effect of biomass additives on the plastic properties of coal has been analyzed comprehensively; the optimal amount of additive for practical purposes has been determined. Methods. Multiple coal characteristics in the plastic stage have been studied using a dilatometric method, the enhanced swelling pressure method, the plastometric method, and the Roga index test. The first three methods make it possible to characterize the caking properties of coal; and the Roga index test characterizes its coking ability. Findings. It has been identified that the optimal amount of biomass additive to study the effect on the properties of coal in the plastic state is more than 5 wt. %. In the paper, experimental dependences of the 5 wt. % cellulose addition influence on the caking properties of four coal grades have been obtained. The results showed a slight decrease in caking properties in terms of swelling, swelling pressure, thickness of the plastic layer, and caking ability. Simultaneously, the most sensitive methods for assessing the effect of cellulose addition on the coal plastic properties are the dilatometric method as well as the enhanced method for the swelling pressure determination. Originality. A comprehensive study of the effect of pure cellulose as a component of lignocellulose biomass on the properties of different coal grades in the plastic state (i.e. caking prperteis) has been carried out. A slight change in the coal properties in the plastic state with adding 5 wt. % cellulose, decreasing caking properties, has been shown. An important, not previously reported, conclusion is that the cellulose additive does not have any noticeable effect on the physical properties of the coal charge owing to its loose structure. Practical implications. A slight change in the caking properties of coal has been established with the addition of 5 wt. % which is of practical importance for the preparation of coal blends, and the coke production in the cases of using additives of lignocellulosic biomass without losing its quality. Additionally, renewable additive use while obtaining fuels and reducing agents is an approach to mitigate the negative environmental impact.
Polymetallic mineralization hosted in the Neogene sedimentary strata of the Algerian Tellian Range: A comprehensive overview
Authors: Zighmi Karim , Zahri Farid , Hadji Riheb , Benmarce Kaddour , Hamed Younes
Published: July 2023

Purpose. In the electronics industry, stibium (Sb) is an important element used in the development of silicon-based devices. The metallogenic district of Guelma, known for its polymetallic antimony mineralization, is not currently exploited. The research purpose is to characterize the minerals and gang formations of antimony elements required as dopants during the growth of monocrystalline silicon. Methods. The research methods include detailed geological mapping and sampling, XRD mineralogical identification, XRF geo-chemical analysis, and atomic absorption spectrophotometry. Findings. The results obtained prove that Sb mineralization is the youngest in the North-East of Algeria, since it is hosted in the dolomitized lacustrine limestone of the Mio-Plio-Quaternary. The mineralization has been deposited by the replacement and filling open spaces. A supergene alteration of the Nadorite mineral has led to the antimony sulfides appearance. Originality. Unique mineral species of the world have been identified: Nadorite in Jebel Nador, Flajolotite in Jebel Heimel, valentinite in Jebel Senza, senarmontite in Jebel Hammimat, and cervantite near Aïn Kerma. The Ham-man N’Baïls deposits still contain significant reserves of Zn, Sb, and Pb. Practical implications. With the help of this study, we have answered questions related to the origin of the mineralizing fluids responsible for the formation of deposits. In addition to the epigenetic nature of the mineralization with the formation of unique and rare minerals throughout the world, the presence of gold in this region has been proven by chemical analysis.
Legal aspects of mining in Ukraine: European integration vector
Authors: Kirin Roman , Yevstihnieiev Andrii , Vyprytskyi Andrii , Sieriebriak Stanislav
Published: July 2023

Purpose is analysis of the current legal tools and acts in the field of mining in the European Union to identify and substantiate their potential consideration while reforming Ukrainian legislation in the context of European integration, energy transformation, and postwar recovery. Methods. The study is a sequential analysis of the European sources for legal support of mining. The analysis is aimed at determination of tendencies, their necessity and implementation expediency while reforming the national legislation on subsoil as well as mining legislation. Findings. Elements of the current legal mechanism from the viewpoint of subsoil use in the EU have been reviewed. Moreover, they have been systemized according to following types: tools and institutions; messages (communications) and reports; and directives, instructions, procedural rules, and the EU decisions. Reformation tendencies of legal mining support have been substantiated. The tendencies depend upon the fact that Ukraine selected the Eurointegration vector as well as upon the necessity to decarbonize power sector and postwar recovery specificity. The regulations, relevant for reforming provisions of mining legislation of the certain EU member states required for legal mining support in the field of investment, institutional, permissive, and contractual relations, have been defined. Originality is substantiation of expedient use of sustainable European practices in the legal regulation of Ukrainian mining sector based upon the achievement of symbiosis of preserving the national interests as well as fulfillment of integration obligations in the process of energy transformation and postwar recovery. Practical implications are expedient implementation of the findings in the process of legislative activities; law enforcement actions by officers of the authorized state bodies and economic entities in the field of mining; and research connected with further development of mining law theory; and academic activities related to teaching of topics concerning the current legal aspects of mining.
Effect of ore heterogeneity on the ball mill wear rate during a grinding process at gold mines of Saudi Arabia (KSA)
Authors: Abdelhaffez Gamal S , Ahmed Haitham M , Saleem Hussein A
Published: July 2023

Purpose. The current research aims to study the effect of gold ore grinding on the wear rate of grinding balls. Methods. Six boulder rock samples were selected from some KSA mines; five core samples were taken from each of them to identify the mechanical properties (compressive strength, Young’s modulus, and Poisson’s ratio). These mechanical properties were applied to identify the hardness class of all 30 core samples. Five samples with different mechanical properties from the same boulder sample were milled to study the effect of the compressive strength difference and grinding time on wear rate. Then, six samples were taken from different regions with similar mechanical properties but different petrographic characteristics. They were also milled under the same grinding conditions to study the effect of the microscopic mineral composition on the wear rate. Findings. The results showed that the wear rate increased with the improving mechanical properties and with the increa-sing grinding time. On the other hand, the results based on different microscopic descriptions of the six samples showed that despite similar mechanical properties, the wear rates differed. Petrographic characteristics confirmed the presence of quartz in most of the samples as an associated mineral; it is likely that it has the greatest effect on the grinding ball wear. Originality. The paper proposes a method for investigating ore heterogeneity, which has a major impact on the wear rate during a grinding process, as well as on the reducing costs and improving efficiency of grinding media. Practical implications. The research emphasizes the importance of investigating variables (e.g. ore heterogeneity) other than ball size, grinding medium composition, and wet or dry grinding that have a substantial impact on grinding efficiency. The findings could be applied in feasibility studies to calculate and evaluate grinding costs versus grinding efficiency.
Research into deformation processes in the rock mass surrounding the stoping face when mining sloping ore deposits)
Authors: Salkynov Arnat , Rymkulova Arailym , Suimbayeva Aigerim , Zeitinova Sholpan
Published: July 2023

Purpose. Determining the patterns for geomechanical state changes in the rock mass, depending on the stoping face technological parameters for sloping ore deposits. Methods. The state-of-the-art CAE Fidesys strength analysis system has been adopted to conduct the research on geomechanical processes around the stoping face, which is effective in a flat formulation. The system used provides a complete engineering process cycle from the preparation of the calculation model to the visualization of the calculation results. The real physical-mechanical properties of ores and host rocks of the Zhezkazgan field (Kazakhstan) are the initial data. Findings. As a research result, the patterns of change in the stress-strain state around the stoping face have been obtained, namely, the maximum tensile and compressive deformations in the room fenders and rocks of a parting, depending on its thickness (from 0 to 10 m). Based on the data obtained, it has been revealed that in the studied mining-geological conditions, elastic deformations predominate around the stoping face. Originality. As a result of conducted numerical experimental studies, a new solution is proposed for an important scientific problem related to predicting the natural and technogenic geomechanical state of the rock mass. Practical implications. The results obtained make it possible to develop technical solutions for the modernization of the room-and-pillar (panel-and-pillar) mining system under conditions of sloping fall of ore bodies in the conditions of the Zhezkazgan field.
Studying rock mass jointing to provide bench stability while Northern Katpar deposit developing in Kazakhstan
Authors: Tolovkhan Bauyrzhan , Smagulova Assemgul , Khuangan Nurbol , Asainov Sergey , Issagulov Sayat , Kaumetova Dinara , Khussan Bolatkhan , Sandibekov Manarbek
Published: July 2023

Purpose is to identify the basic joint systems, their characteristics, distribution within the rock mass, and determine impact of the joints on the bench stability. Methods. The risks of strain emergence in the form of blocks sliding along weakness surfaces within the local areas were determined based upon the definition of rock stability loss. The results of large-scale measurements of jointing were processed using circular and bar diagrams as well as stereographic grids. In the context of the paper, kinematic analysis was implemented through Dips Rocscience Inc. Software. Findings. Five basic joint systems have been identified; joints of 2nd and 5th systems are the most commonly encountered among them. The results of the jointing determination within the open pit boundaries have been represented as well as the open pit wall stability in terms of each site inclusive of consideration of potential strains along the sliding surface. Originality. For the first time, zoning of the open pit wall in terms of slide types has been performed. It has been identified that potential shear of a prismatic block is 33%; at the same time, 66% are bench destruction with the block toppling. The risk of wedge-shaped block shear is minimal. Practical implications. The research findings may be helpful to define and select both parameters and conditions of safe mineral extraction under the specific mining and geological conditions. In turn, the abovementioned will help reduce the risk of accidence while providing scientifically substantiated approach to select quarrying sequence, techniques, and system.
Petrophysical analysis and hydrocarbon potential of the Matulla Formation in the Muzhil Field, central part of the Gulf of Suez, Egypt
Authors: Mohamed Ahmed S , Omran Awad A , Mohamed Mostafa T , Nabawy Bassem S
Published: July 2023

Purpose. The research is aimed at evaluating the petrophysical characteristics of the Late Cretaceous Matulla Formation in the central part of the Gulf of Suez in order to detect its hydrocarbon reservoir potential. Methods. Well logs from five wells (Muzhil-1, -2, -4, -7, -8) were used to evaluate the Matulla reservoirs based on a computerized approach. Petrophysical parameters and fluid types were calculated, verified using core data, and represented vertically as lithosaturation cross plots and laterally as isoparametric variation maps.. Findings. Evaluation of total porosity (Φt), effective porosity (Φe), shale content (Vsh), water saturation (Sw), permeability (K), bulk volume of water (BVW), and net pay characteristics of Matulla Formation in the Muzhil wells showed the following weighted average values: 18-23%, 15-19%, 21-40%, 20-100%, 1.1-281 mD, 3-21% and 0-83 ft, respectively. The Log-derived lithology identification indicates that the major matrix component of the Matulla Formation is quartzose sandstone with minor shale and carbonate contents. The upper zone is a poor reservoir, while the middle and lower zones are considered good reservoirs in all studied wells. It is expected that Muzhil-2 will produce oil without water; however, Muzhil-1 and Muzhil-4 will produce oil with water; while Muzhil-7 and Muzhil-8 will produce water only. Originality. Detailed log-derived petrophysical evaluation, verified by core analysis and well tests (DST and MDT), construction of lithosaturation cross plots for each well and isoparametric petrophysical maps are performed for the first time for Matulla Formation in the Muzhil field. Practical implications. The obtained results on lithosaturation and petrophysics have expanded the knowledge about the characteristics of the Matulla Formation sediments, hosting promising reservoir intervals, and should be taken into account in future exploration and development of the Muzhil field.
Lung cancer classification based on support vector machine-recursive feature elimination and artificial bee colony
Authors: Alhadi Bustamam  , Zuherman Rustam  , Selly A. A. K  , Nyoman A. Wibawa  , Devvi Sarwinda  , Nadya Asanul Husna
Published: July 2023

Early detection of cancerous cells can increase survival rates for patients by more than 97%. Microarray data, used for cancer classification, are comp osed of many thousands of features and from tens to hundreds of instances. Handling these huge datasets is the most imp ortant challenge in data classification. Feature selection or reduction is therefore an essential task in data classification. We prop ose a cancer diagnostic to ol using a supp ort vector machine for classifier and feature selection. First, we use supp ort vector machine-recursive feature elimination to prefilter the genes. This was enhanced with the artificial b ee colony algorithm. We ran four simulations using Ontario and Michigan lung cancer datasets. This approach provides higher classification accuracy than those without feature selection, supp ort vector machine-recursive feature elimination, or the artificial b ee colony algorithm. The accuracy of a supp ort vector machine using a feature selection-based recursive feature elimination metho d combined with the artificial b ee colony algorithm reached 98% with 100 b est features for the Michigan lung cancer dataset and 97% with 70 b est features for the Ontario lung cancer dataset. SVM with RFE-ABC as the feature selection metho d gives us an accurate result to diagnose Lung cancer using microarray data.
Heat transfer of thin-film Casson hybrid nanofluid flow across an unsteady stretching sheet
Authors: Nur Ilyana Kamis  , Md Faisal Md Basir  , Taufiq Khairi Ahmad  , Lim Yeou Jiann
Published: July 2023

Hybrid nanoparticles copper and alumina effect on the heat transfer of thin-film blood flow toward an unsteady permeable stretching sheet is studied. The influence of suction is considered. The governing partial differential equations together with boundary conditions are reduced into the set of ordinary differential equations by implementing the similarity transformations. The Keller-box method is used to solve the momentum and heat equations. The characteristics of the blood flow and heat transfer under the effect of unsteadiness parameter, nanoparticles volume fraction, Casson parameter, and intensity of suction for different thin-film thickness are discussed. The numerical results of the velocity and temperature profiles are graphically displayed. The physical interest such as the local skin friction and Nusselt number are depicted in a tabular form.
GOLD PRICE FORECASTING USING MULTIPLE LINEAR REGRESSION METHOD
Authors: Tyasnurita Raras , Luthfiansyah Rifqi Rahmadrian , Brameswara Muhamad Rayhan
Published: July 2023

Abstract – Price forecasting is a part of economic decision making. Forecasting the daily rise and fall of gold prices can help investors decide when to buy or sell the commodity. The price of gold depends on many factors such as the price of other precious metals, the price of crude oil, the performance of the stock exchange, and the exchange rate of currencies. This study discusses gold price forecasting using the multiple linear regression method. The results of this study indicate that the best model is in the data distribution of 70%: 30% for training and testing, with a MAPE of 4.7% Based on these results, it can be concluded that the use of multiple linear regression method produces a fairly good model for gold prices forecasting. Besides, the correlation analysis show that the price of other precious metals greatly influences the price of gold where in this case the silver price whose correlation value is 0.87. Keywords: forecasting, gold investment, multiple linear regression Abstrak: Peramalan harga merupakan bagian dari pengambilan keputusan ekonomi. Melakukan peramalan terhadap kenaikan dan penurunan harga emas harian dapat membantu investor memutuskan kapan harus membeli atau menjual komoditas. Harga Emas bergantung pada banyak faktor seperti harga logam mulia lainnya, harga minyak mentah, kinerja bursa saham, dan nilai tukar mata uang. Penelitian ini membahas peramalan harga emas dengan menggunakan metode regresi linear ganda. Hasil dari penelitian ini menunjukkan bahwa model terbaik terdapat pada pembagian data pelatihan 70%  dan pengujian 30%, dengan MAPE sebesar 4.7%. Berdasarkan hasil tersebut dapat diambil kesimpulan bahwa penggunaan metode regresi linear ganda menghasilkan model yang cukup baik untuk  peramalan harga emas. Selain itu, analisis korelasi menunjukkan bahwa harga logam mulia lainnya sangat mempengaruhi harga emas dimana dalam hal ini variabel harga perak yang nilai korelasinya 0.87. Kata kunci: peramalan; investasi emas, regresi linear ganda
IMPLEMENTATION OF CHILDHOOD IMMUNIZATION PROGRAM USING THE WATERFALL METHOD
Authors: Renjani Annisa Syahwa , Syahidin Yuda , Sari Irda , Sukmawijaya Jeri
Published: July 2023

Abstract: Medical records are managed according to established standards, creating information that should be properly maintained and stored for easy access when needed. This study is motivated by the fact that the number of immunization patients continues to increase daily, so authorities still need a long time to collect information in their registration systems. It is very long and has a significant impact on the performance of healthcare workers. This study aims to redesign the immunization information system to help manage medical records and maintain the quality of health care services. The design of the developed immunization system may include information on the processing and reporting of immunization data in hospitals to enable medical staff to report results to immunization services quickly and accurately. The research method used in this study is descriptive with a qualitative approach. Data collection was conducted through observations, interviews, and literature review from studies of researchers and practitioners. The system development method adopts the waterfall method. This study's results indicate that technology is an appropriate method to more efficiently support data processing and reporting when valid data are available. Keywords: immunization; information system; medical record  Abstrak: Rekam medis dikelola sesuai dengan standar yang telah ditetapkan untuk menciptakan informasi yang harus dipelihara dan disimpan dengan baik sehingga informasi tersebut dapat dengan mudah diakses pada saat dibutuhkan. Penelitian ini dilatarbelakangi fakta bahwa petugas masih membutuhkan waktu yang lama untuk mengumpulkan informasi dalam kegiatan pelaporan, karena jumlah pasien yang imunisasi terus bertambah setiap harinya. Waktu yang dibutuhkan cukup lama berpengaruh secara signifikan terhadap kinerja tenaga kesehatan. Tujuan dari penelitian ini adalah mendesain ulang sistem informasi imunisasi untuk membantu pengelolaan pelaporan medis sebagai upaya menjaga kualitas pelayanan kesehatan. Rancangan sistem imunisasi yang dikembangkan dapat mencakup informasi pengolahan dan pelaporan data imunisasi di rumah sakit agar tenaga medis dapat melaporkan hasil secara cepat dan akurat kepada layanan imunisasi. Metode penelitian yang digunakan dalam penelitian ini adalah metode deskriptif dengan pendekatan kualitatif. Pengumpulan data dilakukan melalui observasi, wawancara dan studi literatur hasil penelitian peneliti dan praktisi. Metode pengembangan sistem menggunakan metode waterfall. Hasil penelitian ini menunjukkan bahwa penggunaan teknologi merupakan cara yang cukup untuk mendukung pekerjaan pengolahan data dan pelaporan secara lebih efisien ketika tersedia data yang valid.  Kata kunci: imunisasi; rekam medis; sistem informasi
USE OF KTP TO ACTIVATE START MOTORCYCLE ENGINE WITH MODULE RC-522
Authors: Ananda Ricki , Amin Muhammad
Published: July 2023

Abstract: Motorcycles are the main and affordable choice for the majority of Indonesian people, two-wheeled vehicles are chosen as the transportation that is commonly used. Indonesia has many motorcycle users, in 2019 there were 112,771,136 units. In 2020 there were 115. 023. 039 units, and in 2021 there were 120 .042 .298 units. The many motorcycles, increasing the theft of motorcycles (curanmor), and accidents caused by underage use. The purpose of conducting research to minimize theft, and the use of motorbikes by minors, this research uses quantitative methods. The results of the study found that when the user places the KTP on RC522, the condition of relay 1 will become NC to turn on the motorcycle's ignition system, then relay 2 will turn on the motorcycle's starter for 5 seconds, then it will turn off automatically. for relays, arduino provides pure 5VDC voltage. The conclusion from this study , RFID cards and KTP is have different serials, and different numbers, RFID cards have a serial combination of 9 numbers and letters, while KTP has a serial combination of 27 numbers and letters. Keywords: KTP; microcontroller arduino; sepeda motor; start enggine.  Abstrak : Sepeda motor menjadi pilihan utama dan terjangkau untuk  mayoritas masyarakat Indonesia, kendaraan roda dua dipilih sebagai transportasi yang  umum digunakan. Indonesia memiliki banyak pengguna sepeda motor, tahun 2019 sebanyak 112. 771. 136 unit. Tahun 2020 sebanyak 115. 023. 039 unit,  dan  tahun  2021  sebanyak  120 .042 .298  unit.  Banyak  nya  sepeda  motor,  meningkatkan pencurian sepeda motor (curanmor), dan kecelakaan yang diakibatkan  penggunaan dibawah umur. Tujuan dilakukannya penelitian untuk meminimalisir curanmor, dan pemakaian sepeda motor oleh anak dibawah umur, penelitian ini menggunakan metode kuantitatif.    Hasil penelitian mendapati ketika user meletakan KTP  pada RC522, maka kondisi relay 1 akan menjadi NC untuk menyalakan sistem pengapian  sepeda motor, kemudian relay 2 akan menyalakan stater sepeda motor selama 5 detik,  kemudian akan mati secara otomatis. untuk relay, arduino  memberikan tegangan 5VDC  murni. Kesimpulan dari penelitian ini,kartu RFID dan KTP memiliki serial yang berbeda, dan  jumlah yang berbeda, kartu RFID memiliki serial kombinasi 9  angka  dan  huruf,  sementara  untuk  KTP  memiliki  serial  kombinasi  27 angka  dan  huruf. Kata Kunci : KTP; microcontroller arduino; sepeda motor; start enggine.
Developing an Android-Based Reader Digital Application to Teach Reading Aloud at SMPN 7 Blitar
Authors: Briliani Dian Aprilia , Widiarini Widiarini , Makrifah Istina Atul
Published: July 2023

Students in junior high school, especially in 7th grade are commonly taught reading aloud on learning English. Based on those reasons, research on developing an android-based reader digital application is really needed to be conducted because technology could create productive and interesting teaching and learning process. The purposes of the study are to find out the process of developing an android-based reader digital application as media to teach reading aloud in 7th grade at SMPN 7 Blitar and to figure out the feasibility of an android-based reader digital application as media to teach reading aloud in 7th grade at SMPN 7 Blitar. In order to develop the product Research and Development (R&D) method by Borg and Gall contained 10 steps was used. And it is reduced to 7 steps because of the seven steps can be developed in the product and there is limited time. The observation did by questionnaires. A technique for collecting data from multiple validator experts. Effectiveness is derived from the results of student surveys. The results of this survey show that the materials expert's overall score was 93.8% and 90% for display layout and design by media professionals. Data collection for a survey of 30 students was also 85%. The result shows that the use of applications in he English learning process is approved by teachers and students. The students also sense more motivated to learn English through the application and show an attractive to use the application as the virtual teacher assistant.
The Students’ Perception of the Teacher’s Facilitation in Online Group Work
Authors: Kristianto Ignatius Indra
Published: July 2023

This research examines the students’ perception of the teacher’s facilitation in online group work in English for Managers class at the Faculty of Business and Economics, Universitas Atma Jaya Yogyakarta. The study employed The Community of Inquiry (CoI) framework perspective, which consists of teaching presence, cognitive presence, and social presence. CoI has been widely employed in designing practical online courses. Thus, this descriptive qualitative research analyzed students’ perceptions of facilitation in online group work using questionnaires and interviews. The research participants were English for Managers students. They were selected since they have experience participating in online group work. The results of the study show that most of the participants have demonstrated to possess a positive perception of the teacher’s facilitation in online group work in EFM class at FBE UAJY.