bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis of Bamboo-based Activated Carbon through Physico-chemical Activation for Coal-runoff Wastewater Treatment
Authors:   Politeknik Negeri Lampung, Saputra Anggi , Rina Oktaf , Hidayat Rahmat , Fitria Murni , Akhni Syahdilla Anggiva , Purnomo Ajis , Haryadi Aang
Published: September 2023

Bamboo-based activated carbon (BAC) has been successfully synthesized through a physico-chemical technique. The characteristics of BAC were investigated using Scanning Electron Microscopy (SEM), Fourier Transform Infra-Red (FTIR), and X-Ray Diffraction (XRD). Evaluating BAC performance on coal-runoff wastewater was carried out by varying contact times and adding low-level alum on remediation of pH and Total Suspended Solid (TSS). The results confirm that BAC performs well in stabilizing pH, indicated by the neutral pH, after 10 minutes of interaction. The TSS with BAC treatment and 1% BAC-Alum combination reduced the TSS value from 880 mg/L to levels below the threshold for wastewater quality standards, 387 mg/L and 73 mg/L, respectively. This combination can be an alternative coal-runoff wastewater treatment technique for better environmental quality.
Reducing Chemical Oxygen Demand and Turbidity Levels in Laundry Waste Using Activated Carbon from Water Hyacinth Leaves
Authors:   Universitas Kristen Satya Wacana, Riyanto Cucun Alep , Hidayati Nur Ayu , Martono Yohanes
Published: September 2023

Lignocellulose compounds contained in water hyacinth leaves (WHL) (Eichhornia crassipes) can be used as raw material for the manufacture of activated carbon at a low and renewable rate. The ACWHL can be used as adsorbent for reducing a COD value and turbidity levels on laundry waste. The purpose of this study is to determine the best adsorption modelling of ACWHL on COD values and turbidity levels in laundry waste in kinetics and isotherm studies and determine the effectiveness of reducing a COD value and turbidity levels. The process of making ACWHL is carried out by carbonization at 400 °C for 1 hour, then activated using 30% H3PO4 at an impregnation ratio of 1:4 (w/w) for 24 hours and physical activation at 600 °C for 1 hour. The results showed that the adsorption of ACWHL on COD value and turbidity levels of laundry waste followed Freundlich isotherm and Elovich isotherm modelling with R2 values of 0.9535 and 0.9905, respectively. The modelling for adsorption kinetics of COD values and turbidity levels in laundry waste follows the Pseudo Second Order kinetics modelling. The effectiveness of ACWHL reduction in adsorption of COD value and turbidity levels of laundry waste was 80.76% and 64.71%.
Skrining senyawa Eurycoma longifolia terhadap siklus sel dengan metode docking melalui interaksi cylcin
Authors: Hadi Samsul , Anwar Khoerul , Komari Noer , Azhara Desiya Ramayanti , Rosanti Diah Aulia
Published: September 2023

Latar belakang: Pasak bumi telah dikenal oleh masyarakat secara turun-temurun untuk meningkatkan gairah seksual pada pria (afrodisiaka). Disamping itu dapat meningkatkan performa atlet olahraga dan sebagai antistress, menurunkan tegangan, kemarahan, dan kebingungan. 
Tujuan: Penggunaan yang relatif banyak ini mendorong peneliti berkeinginan melakukan skrining senyawa aktif terhadap antitumor secara in silico dengan melalui 2 tahap yaitu melalaui PASS online dan docking.  
Metode: Metode docking dipakai untuk melihat interaksi stabilitas senyawa dengan cylin. Dalam pengujian ini, Pyrx digunakan sebagai alat docking dengan berbagai target yang berhubungan dengan siklus sel, yaitu cyclin D3 (PDB ID: 3G33), cyclin A (PDB ID: IJSU), cyclin C (PDB ID: 1ZP2), cyclin D (ID PDB: 2W9F), cyclin H (ID PDB: 1KXU), dan cyclin T (ID PDB: 3BLR). 
Hasil: Hasil docking pada masing-masing cyclin menunjukkan interaksi terbaik dengan senyawa berikut ini: cyclin A dan 9-Methoxycanthin-6-one 3-N-oxide (-8,6 Kkal/mol), cyclin H dan Niloticin (-8,0 Kkal/mol), cyclin D3 dan 9-Methoxycanthin-6-one 3-N-oxide (-7,2 Kkal/mol), cyclin D dan Eurycolactone F (-8,4 Kkal/mol), cyclin C dan Niloticin (-7,5 Kkal/mol), serta cyclin T dan Niloticin (-8,2 Kkal/mol). 
Kesimpulan: Berdasarkan skor docking yang diperoleh, kestabilan interaksi diprediksi akan terjadi pada cyclin A dengan 9-Methoxycanthin-6-one 3-N-oxide (delta G: -8.6 Kkal/mol).
Interferons and its use in children with COVID-19: A narrative review
Authors: Chairunnisa Chairunnisa , Suharjono Suharjono
Published: September 2023

Background: All ages, including children, are susceptible to the disease COVID-19. The severity of COVID-19 in children is mild than in adults. One of the recommended antiviral drugs for COVID-19 in children is interferon.
Objective: To describe the efficacy and safety of using interferon in children with COVID-19
Method: The article is a narrative study. The main databases in the article search process in this literature review are PubMed and Google Scholar.
Results: The articles could potentially be involved in this study were 28 articles. A total of 13 articles included the criteria, 9 articles discussed the use of interferon against respiratory syndrome, 4 articles on interferon in children, and one reference from a literature search.
Conclusion: Interferon therapy in COVID-19 in children has a high cure rate but needs to be evaluated in a larger sample of pediatric patients.
Anticancer activity of ethanol extract, n-hexane, and the ethyl acetate fraction of tin leaves (Ficus carica l.) on MCF-7 breast cancer cell lines
Authors: Winanta Aji , Sari Widhi Yana
Published: September 2023

Background: Breast cancer is ranked as the second-highest cause of death in Indonesia. Many of the available cancer treatments result in severe adverse effects for patients. Tin (Ficus carica L.) leaves contain ingredients that can function as anticancer agents. Objective: The study aims to identify phytochemical secondary metabolites in tin leaves and the cytotoxic activity of the extract and tin leaf fraction on MCF-7 cells. Method: Tin leaf powder was macerated with 70% ethanol for 7 days. The extracts were fractionated using n-hexane and ethyl acetate. An identification test with ethanol extract was then carried out using spray reagents. The cytotoxic activity of ethanolic extract, n-hexane and ethyl acetate fraction of tin leaf was determined using the MTT method. Result: The results of the identification with TLC found that the ethanol extract of tin leaves contains flavonoids and steroids. The ethyl acetate fraction of tin leaf was thought to have weak cytotoxic properties with an IC50 value of 274.5877 ug/mL while the ethanol extract and n-heksan fraction of tin leaf do not have cytotoxic properties because they have an IC50 value of 562.827 and 576.3552 ug/mL. Conclusion: Based on the results, tin leaves have the potency to be developed as a chemopreventive agent for MCF-7 breast cancer cells. Keywords: Breast Cancer, MCF-7 cells, tin leaf (Ficus carica), cytotoxic activity
SCIENTIFIC APPROACH TO STUDY OF AL-QURAN MATHEMATICS
Authors: Kefi Kefi Miftachul Ulum
Published: September 2023

The purpose of humans' creation in the world is none other than to worship Allah SWT and become caliphs on earth, which is explicitly stated in the Qur'an. Implicitly, there are two aspects of the purpose of human creation, namely the aspect of spirituality as a form of human servitude as a servant to their God and the aspect of intellect as a form of differentiating humans from other living things and as a leader on earth. Formation of spiritual aspects based on religious dogmas as doctrines, as well as intellectual aspects based on religious dogmas using rationality and empiricism approaches.The intellectual aspect is formed with an emphasis on science, one of which is mathematics, particularly sub-logic, reasoning, and more as the initial foundation for leadership on a micro- to macroscales.
DIGITAL CIVILITY INDEX IN THE ERA OF INFORMATION TECHNOLOGY: A CASE STUDY OF HIGHER EDUCATION MUSLIM STUDENTS IN YOGYAKARTA
Authors: Ramadhani Iin Fadila , Krismono
Published: September 2023

Globalization that occurs requires people to be literate about technology. This should not affect the public in using the internet. This research is a descriptive research through interview, surveys, and observations with Muslim students at universities in Yogyakarta as research subjects. Compared to other countries in Asia, Indonesia is the most impolite country based on a survey conducted by Microsoft. This figure is higher when compared to the previous year. The amount of hoax and fraud news influences the level of public decency. From the resulting sample, as many as 20% have spoken harshly on social media and the other 80% have never, this difference is influenced by the environment around each youth which is different. With the majority of Muslim students not being able to say impolite sentences, it needs to be maintained, whereas if they still say harsh sentences/discrimination in cyberspace, it needs to be minimized through cooperation by all levels of society, from families, schools to government agencies.
THE REVIEW OF MASLAHAH MURSALAH ON THE E-COURT SYSTEM AT RELIGIOUS COURT
Authors: Siti Inayah
Published: September 2023

As a result of the industrial revolution, technological developments in the world are increasingly massive. Almost all systems of human life are assisted by sophisticated technologies and are connected to the internet. This aims to facilitate human work and activities, including government services which currently have many collaborated with sophisticated technology in maximizing public services. This step is seen as the right step, considering the sophistication of existing technology that is considered more effective and efficient in carrying out public services. As for Islam, the technological progress that enters almost all aspects of human life is seen as a form of maslahah mursalah, which is something that is permissible by syara' as long as it is good acording to the reason and can provide good also avoid bad things for humans. One of the government institutions that uses technology in providing services to the public is the religious court, as a legal instrument where the community can seek justice according to the culprit it handles, a religious court of course must provide maximum service to the community. Through Supreme Court Regulation No. 1 of 2019, the government provides a new innovation by implementing an electronic court system (E-Court) which aims to make it easier for people to litigate. The obstacles that were previously encountered when people were in litigation such as distance, time, and expensive costs were expected to be overcome by the existence of an E-Court which aims to realize fast and cost-effective administration in order to achieve the ideals of an efficient and effective court. For this reason, this research is deemed necessary to see whether these goals have been achieved or not and whether they are in accordance with the mursalah maslahah. This research is a qualitative research with in-depth interview approach and literature study.
The Masculinist Construction of the National Woman and Her Gendered Practice of Love in the Colonial Bengali Fairy Tale Tradition
Authors: Chakraborty Amrita
Published: September 2023

This article will concentrate on the discourses that circulated around the literary genre of the Bengali fairy tale as it developed in the late nineteenth and early twentieth century India, especially regarding its ownership and genesis, and the interaction of this with the political/social debates/discourses surrounding the position and role of women. The discourses generated through the various prefaces and commentaries that accompanied the story collections, constructed a certain idea of the national woman as the bearer of tradition. They posit a theory of the sustenance of indigenous cultural traditions (which included story telling traditions) in her tremendous capacity for all-consuming love. At the same time, the story texts presented and focused on self-sacrificing heroines who fit into the model of indigenous womanhood that was being constructed during this period. This article will argue that these discourses were built on a series of erasures of women’s voices, life stages and emotional spectrums but were serving the purpose of proving the superiority of indigenous traditions over that of the British imperialists. This project of defending Indian tradition, a central aspect of the cultural resistance to British imperialism, was a masculinist project. It reduced women to being mere sites and objects of knowledge.
I Show Her My Feelings: Young Black Men and the Doing of Love in a South African Township
Authors: Dlamini Melusi Andile
Published: September 2023

Love in the lives of young black men in South Africa has received particularly limited attention in literature. Although there has been a steady increase in love scholarship in Africa, these studies have mostly focused on the love experiences of young women. In that context, studies on love often focus on the disproportionate vulnerabilities experienced by young women, such as intimate partner violence. However, this characterisation of love in South African literature has, perhaps inadvertently, promoted a narrow understanding of young black men as being violent and emotionally inept. The article moves beyond these limited conceptualisations of young black men and explores love as a productive force in their lives. Drawing on empirical findings generated from interviews with 34 young men between the ages of 16 and 21, the article shows how love and the young men’s emerging masculinities were experienced as mutually constitutive. Their negotiations of love were experienced as opportunities to resist normative masculinities, demonstrated through ukushela and emotional reflexivity. These young black men’s investment in their relationships suggests the progressive possibilities of love in their lives.
Effect of Carrier-Gas on the Gas Sensing Performance of Co1-2xNixMnxFe2-yCeyO4 Double-Substitution Spinel to Flammable Gases and Volatile Organic Compounds
Authors: Ogundipe Sunday Ayodeji , Nkosi Steven Solethu , Ndlangamandla Ceboliyazhaka Leonard , Motaung David E , Swart Hendrik C , Diale Mmantsae M , Jozela Mudalo
Published: September 2023

The presence of high concentrations of flammable gases and volatile organic compounds in the atmosphere has been widely reported to be detrimental to human survival. A lot of research effort has been put towards finding an efficient means of quick detection of these gases below their ‘immediately dangerous to life or health’ concentrations. Detecting these gases in an oxygen-deficient environment is a crucial task to consider and has been overlooked. In this research, double substitution spinel with chemical formula Co1-2xNixMnxFe2-yCeyO4, where 0 ≤ x = y ≤ 0.3, were prepared via the glycol-thermal technique. The final products following the appropriate substitution are CoFe2O4 (dried naturally), CoFe2O4 (dried with Infrared lamp), Co0.8Ni0.1Mn0.1Fe1.9Ce0.1O4, Co0.6Ni0.2Mn0.2Fe1.8Ce0.2O4, and Co0.4Ni0.3Mn0.3Fe1.7Ce0.3O4 spinel ferrites. The X-ray diffractometry (XRD), High resolution transmission electron micrographs (HRTEM), and X-ray photoelectron spectroscopy (XPS) of the samples confirm the formation of the spinel. The gas sensing performance of this samples were tested at operating temperature of 225 ºC towards liquefied petroleum gas (LPG), ammonia, ethanol, and propanol. The Co0.8Ni0.1Mn0.1Fe1.9Ce0.1O4-based sensor was selective to LPG, with a high response of 116.43 toward 6 000 ppm of LPG when helium was used as carrier gas, 3.35 when dry-air was the carrier gas, 4.4 when nitrogen was the carrier gas, but was not sensitive when argon was used as a carrier gas.
Measurement Invariance of the Mindfulness Attention Awareness Scale among Youths across Five Samples
Authors: Klainin-Yobas Piyanee , Thanoi Wareerat , Vongsirimas Nopporn , Tang Lian Kwang , Ramirez Debbie , Fernandez Zenaida , Sarmiento Jenneth
Published: September 2023

Mindfulness interventions have been implemented in many countries. This study aimed to examine the psychometric properties of English and Thai-version of the 15-item mindfulness attention awareness scale (MAAS) across five samples. A descriptive correlation research was conducted in the Philippines and Thailand, and five data sets were generated using self-reported and online questionnaires. Exploratory factor analyses were used to explore the factorial structure of the MAAS. Confirmatory factor analyses were performed to test measurement invariance across samples. Concurrent validity was tested by examining relationships between the MAAS and psychological well-being (PWB). A unidimensional structure of the MAAS was documented across the five samples. The MAAS demonstrated measurement invariance across samples for both English and Thai versions. Concurrent validity was displayed through significant correlations with PWB. This study produced evidence to support the construct validity, concurrent validity, and reliability of the English and Thai versions of MAAS. This study was not registered.
CORRELATION FUNCTIONS AND QUASI-DETERMINISTIC SIGNALS
Authors: Cheremska Nadezhda
Published: September 2023

When processing data on random functions, they are most often limited to constructing an empirical correlation function. In this regard, the problem arises of constructing a random function (a quasi-deterministic signal) determined by a finite set of random variables and having a given correlation function. Moreover, a random function can often be considered Gaussian, since in many cases a random signal is obtained at the output of the system, which is fairly well approximated by a Gaussian. For stationary random processes and for random fields, this problem has been considered. For random sequences and discrete random fields, as well as for non-stationary random signals, the problem remained open. The article considers the problem of restoring a random sequence from known mathematical expectation and correlation function. Such a model random sequence is constructed, in which the mathematical expectation and correlation function coincide with the given ones. The mathematical expectation and the correlation function are the simplest probabilistic numerical characteristics, but they do not uniquely determine the corresponding set of probability distribution densities that satisfy the conditions of normalization and consistency, provided that for each fixed integer value of the parameter, the random sequence is a continuous random variable. The article considers the restoration of a quasi-deterministic signal in stationary and non-stationary cases. For the stationary case, three examples are given for constructing a quasi-deterministic discrete signal EMBED Equation.DSMT4 , provided that the spectral density has three different forms. For the non-stationary case, the corresponding quasi-deterministic signal was obtained for various cases of the spectrum. The use of a random function model determined by a finite number of parameters makes it possible to significantly simplify the analysis of applied problems, the solution of which is associated with differential equations with random coefficients, which are such quasi-deterministic signals. In this case, there is no need to use a complex apparatus of stochastic differential equations, since the solution of such an equation simply depends on random variables as on parameters.
INNOVATIVE MEASURES OF TEACHING THE DISCIPLINE «BASIC THEORY OF HEALTH AND HEALTHY LIFESTYLE» FOR STUDENTS OF SPECIALTY 017 «PHYSICAL EDUCATION AND SPORTS»
Authors: Bilous Olesia
Published: September 2023

The article presents the developed innovative system of teaching the discipline «Basic theory of health and healthy lifestyle» for students of the specialty 017 «Physical culture and sports». Keys to a comprehensive and deep understanding of health are provided. A list of topics for lectures and practical classes covering all aspects of health - physical, psychological, social - has been compiled. The contingent of students of the discipline and the urgent needs of today are taken into account. In each of the topics, there is an analysis of why this is happening, and then there is a practical toolkit of what to do, again, with an explanation of why this is so. The analysis is from a biochemical, physiological, and psychological point of view. Social factors and world experience in sports and physical culture are taken into account. Variants of scientific game tasks are provided. Measures are provided for students to express themselves in individual and team work. Descriptions of work in classrooms, gyms, and at home are given. The course was implemented at the Department of Physical Education of the National Technical University «Kharkiv Polytechnic Institute» for the specialty 017 «Physical Culture and Sports» of full-time students in the subject «Basic theory of health and healthy lifestyle».
CHOICE OF SYNERGETIC MODELS FOR THE DEVELOPMENT OF COMPLEX DISPOSAL OF POLYMER CONTAINERS AND PACKAGING AFTER THE END OF THEIR USAGE
Authors: Bukhkalo Svetlana
Published: September 2023

The article presents the possibilities of solving some problems within the framework of the choice of models and the scientific justification for the development of a technology for the complex utilization of polymer containers and packaging after the end of their service life in order to increase the efficiency of the use of solid household waste and waste from various industries at a complex enterprise that can provide all its energy needs independently. Research is aimed at studying such issues as: 1) classification-identification of models of the organization of waste collection and transportation; 2) their classification-identification according to quality control methods, taking into account resistance to the action of natural factors - sunlight, water; climatic conditions and microorganisms; 3) analysis of the choice of scientifically based models of processing and utilization of polymers as part of solid household waste; 4) development of necessary technological schemes and equipment for waste processing; 5) the choice of enterprises for the utilization of polymers and the type of energy resources for the implementation of these design and technological solutions.
Analisis Faktor yang Mempengaruhi Kondisi Rumah Masyarakat Desa Helandohi Menggunakan Analisis Regresi Berganda
Authors: Loban Jeni Marianti , Mau Jefrianus
Published: September 2023

This study aims to see the relationship between the Dependent Variable (Y), namely the condition of the house, Independent Variable (X1): number of family members, Independent Variable (X2) : education level, and Independent Variable (X3): family income. The data was obtained directly (primary data). Using multiple linear regression method with SPSS software. The result obtained from the F test the variable number of family members (X1), the education level variable (X2), and the family income variable (X3) simultaneously influence the housing condition variable. The regression equation is Y = 0.398 + 0.019 X1 + 0.001 X2 – 0.019X3 and the value of R2 = 0.76.
A MODEL PEMBELAJARAN ACTIVE LEARNING TIPE SNOWBALL THROWING DAN TIPE INDEX CARD MATCH (ICM) TERHADAP PEMAHAMAN KONSEP SISWA PADA PEMBELAJARAN IPS DI SEKOLAH DASAR
Authors: Rifqi Abdul Basit  , Enok Maryani
Published: September 2023

Penguasaan materi pembelajaran adalah salah satu tujuan utama dalam pendidikan. Tujuan dari penelitian ini adalah untuk mempelajari model pembelajaran lemparan bola salju dengan tipe kartu indeks yang sesuai dengan kemampuan pemahaman peserta didik di sekolah dasar. Penelitian ini dilakukan pada siswa kelas IV SDN Cikampek Barat II, Kecamatan Cikampek, Kota Karawang. Jumlah peserta dalam penelitian ini sebanyak 26 siswa di kelas eksperimen 1 yang menerapkan model pembelajaran snowball throwing dan 26 siswa di kelas eksperimen 2 yang menggunakan model pembelajaran indeks kartu pertandingan. Metode penelitian yang digunakan dalam penelitian ini adalah metode kuasi eksperimen dengan desain pretest postest control group design control. Data penelitian dikumpulkan menggunakan instrumen tes dan rubrik. Berdasarkan hasil penelitian, dapat disimpulkan bahwa model kartu indeks pembelajaran cocok lebih efektif dalam meningkatkan pemahaman peserta didik tentang bahan rumah dan pakaian adat Indonesia dengan model pembelajaran melempar bola salju .

Kata Kunci: Pembelajaran Aktif , Pelemparan Bola Salju, Pencocokan Kartu Indeks , Pemahaman Konsep.
Study Of Workload And Employee Competence Towards Employee Performance With Organizational Commitment As An Intervening Variable
Authors: Nafiudin  , Nurjanah Siti , Tjalla Awaluddin , Suparno Suparno , Febriantina Susan , Andari Andari , Fujianti Aini , Fauzan Alfa , Sanjaya Brata , Suprayogi Wahyu
Published: September 2023

Employee performance that is not as expected has an impact on the overall performance of the organization, so the focus of this study is to examine the influence of workload, competence on employee performance through organizational commitment studies on employees of PT Hitachi Metals Indonesia Cilegon with a total sample of 100 employees in the Quality Control Division, the data collection technique used is the distribution of questionnaires with a Likert scale as a rating scale, In this study, the hypothesis is tested using path analysis with SPSS and the Sobel Test, and the results show that workload has a positive effect on commitment and performance, and competence has a positive effect on employee commitment and performance. While organizational commitment can mediate between workload and performance, as well as competence and performance.
Trans-conductance amplifier calibration protocol establishment – metrology ambiguities, constraints, and measurement uncertainty propagation analysis
Authors: Demerdziev Kiril , Cundeva–Blajer Marija
Published: September 2023

The primary dilemma, when establishing calibration protocol for testing of any measurement transducer, is whether the concrete unit is going to be regarded as a standalone instrument, or it will be treated as a part of an integrated measurement system. The first approach would provide results that are applicable for broader further usage. The data obtained if the unit is calibrated within the measurement system, may be further used only for performance evaluation of the overall system. The concrete ambiguity is related to the appropriate quantity selection on the basis of which the measurements will be carried out, i.e., whether the measurand is the transducer’s output signal or its transformation coefficient. The determination of the quantity, which is supposed to be recorded, opens a further debate about the appropriate selection of measurement points and the uncertainty evaluation procedure, both in terms of dominant influential factors determination, and in overall uncertainty budget distribution modelling adequacy. In the concrete contribution, an originally developed protocol for high current trans-conductance amplifier examination will be presented, taking into account both perspectives for examination.
Evaluating the uncertainty of a virtual power quality disturbance generator and its use in power quality classifier evaluation
Authors: Velkovski Bodan , Markovska Marija , Kokolanski Zivko , Taskovski Dimitar , Dimchev Vladimir
Published: September 2023

This paper presents the metrological evaluation of a proposed virtual power quality (PQ) disturbance generator. It explains in detail the calibration and measurement uncertainty estimation procedures for the RMS voltage and frequency of the generator, presents the results, and discusses their implications. The results indicate that the measurement uncertainty of the generator is satisfactory for all reference points, making it suitable for generation of PQ signals for research purposes, particularly in the development, testing, and improvement of PQ event classifiers. Additionally, the paper introduces a virtual power quality disturbance classifier for real-time classification of PQ events and verifies its accuracy through testing using the proposed PQ disturbance generator.
Are We There Yet? Tight-Oil Producers Still Chipping Away at Parent-Child Problems
Authors: Jacobs Trent
Published: September 2023

In June, ExxonMobil’s CEO announced at an investor conference that the oil giant is experimenting with “very promising new technologies” poised to substantially enhance its recovery rates in the Permian Basin.

Darren Woods was light on specifics. Nonetheless, ears perk up when the head of the largest oil producer in the US suggests that it’s making progress on its goal to double the oft-cited and oft-derided 10% recovery factor of shale resource plays.

What Woods clued the outside world into is ExxonMobil’s optimism around drilling extra-long horizontal wells (17,500-ft laterals vs. the more-typical 10,000 ft) and the work that engineers are doing to make sure such wells can be effectively propped. Both count as compelling kernels to chew on.

But the CEO alluded to another area of notable progress when he said, “There are very few companies or organizations out there that could tell you exactly how fracs propagate and what that looks like underground—our view is that’s just a hard science project problem to solve.”

A couple of weeks later, the largest oil and gas producer in the US shared a much more in-depth assessment of that science problem at a different industry gathering—this time the Unconventional Resources Technology Conference (URTeC).

In URTeC 3860704, two dozen authors from ExxonMobil describe a four-well test used to steer decision making in the Midland Basin side of the Permian where it is among those drilling massive multiwell projects known as cube developments.

The experiment raised enough red flags for ExxonMobil to rethink its plans for a tight-well design. Multiple sources of data showed the wells were too close, their fracture networks in too much communication.

“These results suggest the pilot location was overcapitalized and that future developments should be drilled at fewer wells per section,” the authors concluded.

Those are not words that an oil company generally likes to hear. However, the point is that ExxonMobil learned of a poor outcome on a small scale which ostensibly preempted further financial pitfalls at the location.

Cautionary tales such as Concho Resource’s 23-well “Dominator Project” in 2019 have demonstrated to all tight-rock producers—and particularly Permian cube developers—the consequences of insufficient subsurface analysis.

In the words of ExxonMobil’s engineers and other specialists, “This integrated project clearly established the value of running diagnostic pilots and collecting high-resolution data before, during, and after completions to quantify the size and shape of the fractures created and propped extent of the stimulated rock.”

ExxonMobil’s latest study is one of several published this year to suggest that while the work is far from complete, significant leverage is being gained over the parent-child phenomenon.

Another big operator known for keeping a close eye on fracture propagation announced it has developed a tandem of new models to help improve parent-child relationships in the Eagle Ford Shale of south Texas.
Study Compares Fixed Wind Architectures for Offshore Green Hydrogen Production
Authors: Carpenter Chris
Published: September 2023

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 32317, “Fixed Wind Architecture Comparison for Offshore Green Hydrogen Production,” by Dominic Pliszka, Catherine Gourlay, and Nihad Abdullazada, Subsea7, et al. The paper has not been peer reviewed. Copyright 2023 Offshore Technology Conference. Reproduced by permission.

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The complete paper is a summary of a study that covers through-life economics for producing green hydrogen from offshore fixed wind turbines. The options compare production of hydrogen on the turbine itself (decentralized) with production on a dedicated production platform (centralized) and production from an onshore facility. The results of the economic analysis show that decentralized hydrogen production can be competitive against onshore production at longer offshore distances.

Introduction

The paper contains a summary of an offshore green-hydrogen-production study performed by a group of companies. The field architectures for each of the evaluated cases are described and the results of the economic analysis are presented in the complete text.

Field Architecture Layouts

The hydrogen production cases in the study are divided into three architectural layouts.

Case 1: Onshore Hydrogen Production. The electricity produced at the offshore wind farm is gathered by interarray cables and directed to an offshore substation. From this location, the combined power is transported to an onshore hydrogen production facility through offshore export cables. Case 1 (the base case) is used to benchmark and compare the results against Cases 2 and 3.

Case 2: Offshore Hydrogen Production (Decentralized). The electricity generated by each offshore wind turbine is directed to a hydrogen production unit specific to each of the turbines, and green hydrogen is produced. Hydrogen is collected and exported through a dedicated hydrogen transport line to onshore facilities. Case 2 also is referred to as a wind farm with a decentralized hydrogen production system. In this scenario, a gas compressor located on each wind turbine is considered.

Case 3: Offshore Hydrogen Production (Centralized). The electricity produced at the offshore wind farm is directed to a hydrogen-production facility at a centralized offshore substation. The hydrogen from the substation is exported through a dedicated hydrogen transportation line to onshore facilities. This scenario is also referred to as a wind farm with centralized hydrogen production system.

Wind-Farm Overview

A single wind turbine with a maximum power output of 15 MW is assumed as the basis of this study. The wind farm has 67 turbines on fixed monopile foundations, giving a power rating of 1 GW. The wind turbines will be connected in a daisy-chain manner, each chain containing eight or nine turbines.
Automatic Gait Events Detection with Inertial Measurement Units: Healthy Subjects and Moderate to Severe Impaired Patients
Authors: Voisard Cyril , De l'Escalopier Nicolas , Ricard Damien , Oudre Laurent
Published: September 2023

Background: Recently, the use of inertial measurement units (IMUs) in quantitative gait analysis has been widely developed in clinical practice. Numerous methods have been developed for the automatic detection of gait events (GEs). While many of them have achieved high levels of efficiency in healthy subjects, detecting GEs in highly degraded gait from moderate to severely impaired patients remains a challenge. In this paper, we aim to present a method for improving GE detection from IMU recordings in such cases.
Methods: We recorded 10-meter gait IMU signals from 13 healthy subjects, 29 patients with multiple sclerosis, and 21 patients with post-stroke equino varus foot. An instrumented mat was used as the gold standard. Our method detects GEs from filtered free acceleration and gyration signals. Firstly, we use autocorrelation and pattern detection techniques to identify a reference stride pattern. Next, we apply multiparametric Dynamic Time Warping to annotate this pattern from a model stride, in order to detect all GEs in the signal.
Results: We analyzed 16,819 GEs recorded from healthy subjects and achieved an F1-score of 100%, with a median absolute error of 8 ms (IQR [3-13] ms). In multiple sclerosis and equino varus foot cohorts, we analyzed 6067 and 8951 GEs, respectively, with F1-scores of 99.4% and 96.3%, and median absolute errors of 18 ms (IQR [8-39] ms) and 26 ms (IQR [12-50] ms).
Conclusions: Our results are consistent with the state of the art for healthy subjects and demonstrate a good accuracy in GEs detection for pathological patients. Therefore, our proposed method provides an efficient way to detect GEs from IMU signals, even in degraded gaits. However, it should be evaluated in each cohort before being used to ensure its reliability.
SMOTE based Ensemble model for educational data mining
Authors: M stalin , S Kalyani
Published: September 2023

Data mining in the classroom is one of the prominent fields which involves data mining concepts, statistical analysis, and machine learning concepts which all gets applied on the educational data. These EDM processed data are widely used for analysing the various aspects of the business and process model. Existing and conventional process model involves the usage of conventional statistical techniques to process the data which in-turn needs a lot of manual interventional for data modelling and pre-processing. To address the above-mentioned issues this paper proposes a novel technique which combines the machine learning model along with the statistical approaches. This machine learning combination involves the ensembling different classifiers such as Decision tree, logistic regression, K nearest Neighbour, Random Forest, multiplayer perceptron etc. The data which utilized in the experimentation is highly imbalanced due to the limited data availability. Hence the above claimed technique is combined with the universally benchmarked model called synthetic minority oversampling technique (SMOTE) to address the problem of class imbalance. Further, the performance evaluation is also statistically performed in order to prove the efficacy of the proposed technique.
Numerical simulation and optimization study of glass fiber transport processes using multi-region coupling schemes
Authors: Qian Xu , Yang Su , Liu Chunbao
Published: September 2023

Governing the flow of air can be a challenge in many conditions. In chemical production, the airflow disturbance occurring during glass fiber transport can be abstracted as a multi-fluid domain coupling problem, resulting from a superposition of aerodynamic behaviors induced by multiple moving boundaries. Taking air disturbance during glass fiber transport as an example, a numerical analysis method for coupled airflow in multiple fluid domains considering dynamic meshing boundaries is proposed. A computational fluid dynamics (CFD) approach is developed which combines twodimensional analysis and three-dimensional analysis of a fiber thrower (including a finger wheel and a pull wheel). The presented numerical approach obtains the flow field data which is difficult to acquire by the experimental method. The flow structure of the pull wheel wake during fiber transport is described. Findings show that the pull wheel, but not the finger wheel, dominates the flow structure of the external flow field of the fiber thrower. The airflow around the fiber thrower is weakened by reducing the height of the trapezoidal section of the pull wheel. This analysis of airflow disturbances in the chemical industry is representative.
Improving the search ability of GP using semantic diversity and local search
Authors: Liang Jiayu , Lu Yaxin , Wu Han
Published: September 2023

Genetic programming (GP) is one of evolutionary computation algorithms, which simulates the evolution procedure in nature. To improve the search ability of GP, the integration of semantics and/or local search into GP has attracted significant attention. Since the existing works have shown the advantage of preserving semantic diversity through genetic operators (crossover and mutation) during evolution in GP, this work focuses on investigating new genetic operators aware of semantic diversity for GP. However, the existing semantic diversity operators rarely consider local search that may further improve their search ability. To address this issue, two new genetic operators (a crossover and a mutation) are designed, which involve both a mechanism of increasing semantic diversity and a step of local search. They are termed as semantic crossover with local search (SCls) and semantic mutation with local search (SMls), based on which two new GP-based methods are developed, i.e. GP_SCls and GP_SMls. The proposed methods are compared with GP, three reference semantic diversity methods and five non-GP regression methods for regression tasks. Results show that GP_SCls and GP_SMls are generally better than both GP and the reference semantic diversity methods, since their evolved solutions achieve lower RMSE (root mean square error) values and they converge faster for most test cases. In addition, compared with five non-GP regression methods, the proposed methods perform consistently better for the given tasks.
Brain-inspired emotional learning algorithm enhanced with type-one and interval type-two fuzzy extreme learning machine in noisy data
Authors: Golshan Mehdi , Teshnehlab Mohammad , Sharifi Arash
Published: September 2023

One of the advanced machine learning branches is emotional learning based on brain emotional learning (BEL), which has been widely used for almost three decades. BEL mimics the emotional learning mechanism in the mammalian brain, which has the superior features of fast learning, quick reacting, and low computational complexity. The original BEL model inspired by the limbic system is composed of two neural network components, namely the amygdala (AMYG) and orbitofrontal cortex (ORBI), which interact with each other. Using a fuzzy extreme learning machine (FELM), a brain-inspired emotional learning model was developed in this study to predict noisy, chaotic time series. The exchange of information between AMYG and ORBI is facilitated by an online sequential type-one FELM with interactive recurrent memory (OIRMS-T1FELM). The CenteroMedial (CM) section of AMYG uses type-one FELM (T1FELM) and interval type-two FELM (IT2FELM). Hence, the proposed model is named BEL-OIRMS-T1/IT2 FELM. The impact of noise on time series targets was determined by altering the various standard deviation of Gaussian noise levels (Sig). The experimental results show that the interaction between AMYG and ORBI leads to the reduction of RMSE in their outputs. Also, when IT2FELM is used instead of T1FELM in the CM of AMYG, the RMSE and MAPE of the final prediction output are lower, and the R is higher. In this state, by increasing the noise level, the proposed method with MF=2 performs better than other states.
Sudan Geodetic and Geospatial Reference System
Authors: Sami Kamal Abdellatif
Published: September 2023

The development in information and satellite technologies and geospatial data productions of today, let the Sudan Survey Authority to study all available options for a change from its local datum, Adindan to a global reference frame to be in line with the United Nations Global Geospatial Information (UNGGIM) committee of expert recommendations. Sudan Survey Authority (SSA) finally adopted the ITRF2008 (IGS2008) to be as the official Sudan Reference System (SRS). The SRS shall be an accurate reference system for the unification of Sudan existing many geospatial reference systems and datums, geodetic networks and mapping products and to work closely with the international and regional geospatial communities. The Sudan adopted reference system shall assist the public and private sector institutions for improving their organizational integration, data sharing and data exchange capabilities as well as increasing the ability to link geospatial data infrastructure data sets based on common location data, including Sudan National Basemap, property and building surveys, utility surveys and setting outs, natural resources surveys, roads and infrastructure surveys, map productions and map updatings, as well as all what can be considered as geospatial and survey practices in Sudan. The new Sudan reference system (ITRF2008) will be considered as a national Geodetic Reference Frame (NGRF), which, shall help the geospatial community in Sudan to adopt the best practices in the fields of geomatics and geoinformation by enhancing the existing systems and adopting new technologies associated with common standards and specifications. The paper overviewed the technical considerations of the adopted Sudan Reference System and outlined the benefits of the unification of previous georeferencing systems and to eliminate the drawbacks of using many datums within the entire boundaries of Sudan.
Existence results for novel sequential phi-Caputo fractional differential equations via concept of measures of noncompactness
Authors: Darzi Rahmat , Agheli Bahram
Published: September 2023

In this paper, by assuming certain assumptions, a novel class of sequential ⅁-Caputo fractional differential equations (S⅁-CFDE) featuring anti-periodic and ⅁-Riemann-Liouville (⅁- R-L) fractional integral boundary conditions has been studied.
The primary goal of this paper has been to explore whether there exists a uniqueness solution to the proposed class of problem utilizing the manner of the theory of topological degree for Banach contraction principle and the curtailing maps.
Eventually, two specific instances of the study results have been offered to demonstrate its performance and effectiveness.
Could fecal calprotectin serve as an indicator of gastrointestinal (GI) complications in individuals with systemic sclerosis?
Authors: Fatemi Alireza , Hedayatmofidi Hale , Abdolahi Nafiseh , Gharib Mohammad Hadi , Livani Somayeh , Aghaie Mehrdad
Published: September 2023

Introduction
: Systemic sclerosis is a connective tissue disease with unpredictable symptoms. The GI tract is often affected, with calprotectin levels indicating inflammation. We are examining fecal calprotectin as a simple method to diagnose GI disorders and disease activity.
Materials and methods
We gathered information from the 39 patients by filling out a UCLA SCTS 2.0 questionnaire regarding their GI symptoms. Additionally, we examined their skin and determined their skin score. Blood samples were taken to assess malnutrition, and stool samples were collected to measure the calprotectin level. We also conducted a non-aggressive Barium Swallow and CT Enterography to check for GI disorders.
Results
Increased levels of FC didn’t have any correlation with age (P Value = 0.79), disease type (P Value = 0.59), slight intestine wall thickening (P Value = 0.10), esophageal dilatation (P Value = 0.18), skin score (P Value = 0.25), final GI score (P Value = 0.30) and none of the serum tests. In our study, just 5 cases had evidence of wall thickening in CT Enterography, and all those 5 cases had increased levels of calprotectin. Also, as most of our patients take vitamin and mineral supplements, we couldn’t find any signs of micronutrient deficiencies or correlation with FC level.
Discussion and Conclusion:
While no statistical correlation was found between FC level and the variables, the results suggest that FC might be a specific tool for assessing intestinal wall thickness. However, due to the limited sample size, further studies are necessary to validate these findings.