bluuebunny/crossref_metadata_2025 huggingface dataset:
Implementation of Child Protection Services Through Integrative Service Unit Integrative Child Social Protection
Authors: Cahyono Anang Sugeng , Zauhar Soesilo , Domai Tjahjanulin , Suryadi
Published: November 2023

Objective: Children are valuable assets for the nation, but their traumatic patterns affect character formation. The government must address social problems to build a respected future generation. Tulungagung Regency, East Java Province, is the first district in Indonesia that is serious about advocating for children's social issues by inaugurating the Integrative Child Social Protection Integrated Service Unit (ULT PSAI). The research aims to investigate the role of the local government in developing an integrative service model to handle cases of social problems of children in Tulungagung Regency, the model of the child advocacy system carried out by ULT PSAI, and the effectiveness of ULT PSAI Tulungagung Regency activities in advocating for children's social problems.
 
Methode: The method used in this research is Participatory Action Research (PAR) through (FGD) with ULT PSAI, victims, and related Regional Apparatus Organizations to obtain data. The data obtained were then processed and analyzed descriptively and qualitatively.
 
Result: This article discusses the local government in advocating social problems for children through ULT PSAI by involving all Regional Apparatus Organizations in Tulungagung Regency, primary, secondary (outreach to at-risk groups), tertiary (response to child victims) services, and the effectiveness of PSAI ULT can be identified based on handled cases. Seeing the significance, this service model can be used as a pilot model for other regions in Indonesia.
 
Suggestions: It is hoped that the efforts made by the Integrative Child Social Protection Integrated Service Unit (ULT PSAI) of Tulungagung Regency in carrying out advocacy and handling system-based social problems with the services of the Integrative Child Social Protection Integrated Service Unit (ULT PSAI) for vulnerable children can run more optimally by synergizing with related parties.
Lyapunov exponent and the growth rate of geodesic deviation in the Jacobi equation with random curvature
Authors: Mammadova A.E. , Sokoloff D.D.
Published: November 2023

The growth rate of geodesic deviation in a homogeneous and isotropic on average cosmological model, in
which curvature fluctuations are taken into account, is studied. Using numerical simulation methods, it is
shown that the growth rate of geodesic deviation increases with the increase in distance to the celestial body
on a geodesic at the same rate as the length of the two-dimensional vector, composed of geodesic deviation
and its derivative whose growth rate can be theoretically calculated in the so-called Furstenberg theory.
INTERVENÇÃO PSICOSSOCIAL COM GESTANTES DE ALTO RISCO: RELATO DE EXPERIENCIA DE ESTAGIÁRIO
Authors: Garcia Guilherme , Nunes Esther Abigail Helena Maciel , De Souza Leonardo Möller Pedroso , Argimon Irani Iracema de Lima
Published: November 2023

Este estudo relata a experiência de uma intervenção com um grupo de gestantes, que foi desenvolvido por alunos do curso de psicologia como parte da prática de uma disciplina de estágio supervisionado, sendo escolhido a intervenção psicossocial em contexto hospitalar. O local da prática foi em um Hospital da região metropolitana de Porto Alegre no Rio Grande do Sul. Sabe-se que o ser humano busca conviver em grupo, especialmente em momentos delicados em que sente a necessidade de ser acolhido e identificado. A intervenção psicossocial é uma estratégia utilizada em diferentes contextos com o objetivo de promover acolhimento, discussão e reflexão sobre determinados temas. A fase da gestação é uma dessas situações, uma vez que a mulher e o companheiro/família passam por uma série de mudanças em suas vidas.
Competencia digital en estudiantes universitarios: una revisión sistemática
Authors: Neri Tapia Lizbeth , Mortis Lozoya Sonia Verónica , Escudero-Nahón Alexandro
Published: November 2023

El objetivo del estudio fue desarrollar una revisión sistemática de literatura sobre la competencia digital en estudiantes universitarios, con el fin de orientar futuras investigaciones. Se realizó una investigación cualitativa documental de dos fases: heurística y hermenéutica. Los artículos mayoritariamente utilizan el enfoque cuantitativo y alcance descriptivo, revelando información valiosa sobre la competencia digital de estudiantes universitarios. Sin embargo, dada la naturaleza descriptiva de los estudios, no se profundiza lo suficiente en las variables que pudieran explicar los resultados obtenidos. Se concluye que se requiere realizar investigaciones con alcances explicativos y correlacionales para comprender mejor la competencia digital en estudiantes universitarios, considerando factores como evaluaciones del desempeño y creencias personales.
ESTRATEGIAS HEURÍSTICAS DIRIGIDAS A LOS DOCENTES PARA EL DESARROLLO DEL APRENDIZAJE COLABORATIVO
Authors: Liliana Yaneth Ibarra Bautista
Published: November 2023

El propósito del estudio consiste en proponer estrategias heurísticas dirigidas a los docentes para el desarrollo del aprendizaje colaborativo en Educación Básica Primaria, de la Institución Educativa Anna Vitiello, Cúcuta, Norte de Santander. Fundamentado en actividades motivacionales que permitan la interrelación en este proceso. La investigación es descriptiva, de campo, en la modalidad de proyecto factible. El instrumento para la recolección de información se estructuró en la técnica la encuesta de tipo cuestionario y se diseñó en función a las dimensiones planificación, rol docente y acción didáctica; el mismo, estuvo conformado por 23 ítemes y se utilizó la escala de estimación con cinco opciones de respuesta: Siempre, Casi Siempre, Algunas Veces, Casi Nunca y Nunca. En cuanto a la validez del instrumenta, ésta se obtuvo mediante el procedimiento con base en la técnica “Juicio de Expertos”. La confiabilidad se determinó a través del procedimiento Alfa de Crombach, cuyo resultado fue de 0,62 considerándose de magnitud alta. Los resultados arrojan inferencias centradas en lo siguiente: Según la opinión de los docentes, éstos casi nunca desarrollan estrategias motivacionales que permitan procesos de interrelación y colaboración con el aprendizaje; situación que incide en el poco desarrollo cognitivo. Por lo anteriormente señalado, se concluye en la necesidad de diseñar las estrategias heurísticas y así contribuir con el aprendizaje a través de la acción colaborativa de los docentes en su praxis pedagógica.
Analysis of Satisfaction Levels of Patients on Service Quality with The Importance Performance Analysis (IPA) Method
Authors: Vidyanto Vidyanto , Bertus Brigita Natasya , Krisnasari Sendhy , Napirah Muhammad Ryman
Published: November 2023

The Importance Performance Analysis (IPA) method is a survey method that can be used to measure the satisfaction performance that is considered important by customers (expectations) and the satisfaction performance received by customers (reality). This research aims to determine the level of compatibility between performance and expectations of satisfaction towards the quality of service at the Biromaru Public Health Center in Sigi Regency. This type of research was quantitative with descriptive analysis techniques; the sample size used the Slovin formula, while the sampling used accidental sampling techniques. The total sample was 99 respondents. Data were collected through questionnaires and then analyzed using the Importance Performance Analysis (IPA) method. Results show that The Biromaru Public Health Center has met patient expectations in terms of the friendliness and politeness of health workers, the cleanliness of examination rooms, and the timeliness of doctor examinations. However, there are several areas where the health center can improve, such as the cleanliness and maintenance of the building, the waiting time for medicines, and the availability of sophisticated and adequate health facilities. The attributes that patients consider less important, but are still implemented well, include the appearance of health workers, the clarity of drug dosage information, and the good communication of nurses. The Bureaumaru Health Center has met patient expectations in terms of the courtesy and politeness of health workers, the cleanliness of the examination room, and the timeliness of doctor's examinations.
KEPUASAN MENGAJAR SECARA DALAM TALIAN DALAM KALANGAN PENGAJAR INSTITUSI LATIHAN KEMAHIRAN BELIA DAN SUKAN
Authors:   Jabatan Pengajian Umum, Institut Kemahiran Belia Negara Peretak, 44000 Kuala Kubu Bharu, Selangor, Azhar Nurul Asyikin , Mamat Rohaya ,   Jabatan Pengajian Umum, Institut Kemahiran Belia Negara Peretak, 44000 Kuala Kubu Bharu, Selangor, Sathiaseelan Gokillavhani ,   Jabatan Pengajian Umum, Institut Kemahiran Belia Negara Peretak, 44000 Kuala Kubu Bharu, Selangor, Jaswant Singh Hardev Singh Sokhal ,   Jabatan Pengajian Umum, Institut Kemahiran Belia Negara Peretak, 44000 Kuala Kubu Bharu, Selangor, Ismail Sarimah ,   Jabatan Pendidikan Teknikal dan Kejuruteraan, Sekolah Pendidikan, Fakulti Sains Sosial dan Kemanusiaan, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor
Published: November 2023

COVID-19 memberi impak kepada sistem pendidikan, terutamanya dalam Pengajaran dan Pembelajaran. Namun begitu, COVID-19 juga dilihat sebagai agen transformasi dan pemangkin kepada pelaksanaan Revolusi Industri 4.0 melalui e-pembelajaran yang komprehensif. Kajian ini dijalankan untuk mengenal pasti kepuasan pengajaran dalam talian dalam kalangan pengajar di ILKBS di Malaysia daripada empat pembolehubah iaitu capaian internet, kemahiran pengajaran dalam talian, penglibatan pelajar, dan pengurusan masa. Kajian ini menggunakan reka bentuk kajian kuantitatif yang melibatkan 176 tenaga pengajar sebagai sampel kajian yang dipilih secara rawak. Kajian ini menggunakan soal selidik sebagai instrumen kajian untuk mengumpul data yang diedarkan kepada sampel kajian. Maklum balas responden diwakili oleh empat skala Likert. Perisian komputer Statistical Package for Social Science (SPSS) versi 27 digunakan untuk menganalisis data. Dapatan kajian menunjukkan tahap kepuasan yang sederhana dalam kalangan tenaga pengajar melalui e-pengajaran, mungkin ia boleh dijadikan panduan kepada Kementerian Belia dan Sukan (KBS) untuk menambah baik kemudahan internet yang menjadi nadi kepada e-pengajaran, mewujudkan pendekatan pengajaran terbaik yang melibatkan peserta aktif dalam e-pembelajaran, dan merancang masa sebaik-baiknya selaras dengan aliran semasa. Kata Kunci: Pengajar, Kepuasan Mengajar, Pengajaran Dalam Talian, ILKBS, TVET
The protective effect of zinc oxide and selenium oxide nanoparticles on the functional parameters of rat sperm during vitrification
Authors: Saleh Nafiseh Tavakolpoor , Hosseinzadeh Zohreh , Banadkuki Narges Gholami , Novin Maryam Salehi , Zaman Sanaz Saljooghi , Gardeshi Tohid Moradi
Published: November 2023

Objective: While sperm freezing (cryopreservation) is an effective method for preserving fertility, it can potentially harm the structure and function of sperm due to an increase in the production of reactive oxygen species. This study aimed to assess the impact of zinc oxide nanoparticles (ZnONPs) and selenium oxide nanoparticles (SeONPs) on various sperm functional parameters, including motility, plasma membrane integrity (PMI), mitochondrial membrane potential (MMP), acrosome membrane integrity (ACi), and malondialdehyde (MDA) levels. Methods: Semen samples were collected from 20 Albino Wistar rats. These samples were then divided into six groups: fresh, cryopreservation control, and groups supplemented with SeONPs (1, 2, 5 μg/mL) and ZnONPs (0.1, 1, 10 μg/mL).Results: Statistical analysis revealed that all concentrations of SeONPs increased total motility and progressive reduction of MDA levels compared to the cryopreservation control group (p<0.05). However, supplementation with ZnONPs did not affect these parameters (p>0.05). Conversely, supplements of 1 and 2 μg/mL SeONPs and 1 μg/mL ZnONPs contributed to the improvement of PMI and ACi (p<0.05). Yet, no significant change was observed in MMP with any concentration of SeONPs and ZnONPs compared to the cryopreservation control group (p>0.05).Conclusion: The findings suggest that optimal concentrations of SeONPs may enhance sperm parameters during the freezing process.
IV Congreso Científico Red de Investigadores Latinoamericanos: Un aporte al saber humano
Authors: Red de Investigadores Latinoamericana
Published: November 2023

En este libro de resúmenes...
Large-Scale of Hydrogen Underground Storage in Salt Caverns: The Future of Sustainable Energy Storage
Authors: Abreu Julia Franco , Costa Alvaro M. , Costa Pedro V. M. , Miranda Antônio C. O. , Tassinari Colombo C. G. , Weber Nathália , Assi Gustavo , Meneghini Júlio , Nishimoto Kazuo , Ebecken Nelson Francisco Favilla , Wang Pingfeng , Hamdan Bayan , Marquez Anabel Renteria , Xu Yanwen
Published: November 2023

Hydrogen is taking a significant lead as a complementary energy carrier. One of the most significant structural challenges in the hydrogen supply chain is storing large volumes to ensure stability between generation, delivery, and utilization. In this context, geological storage in salt caverns stands out as the most promising technology. Salt caverns mined by leaching have unique physicochemical characteristics such as negligible permeability under high gas pressures (avoiding leakage), self-healing, higher levels of stability, and stress safety shield due to the creep phenomenon. Also, it allows higher injection and withdrawal ratios of Hydrogen, meeting cycles between demand and production, a minor need for cushion gas, and more controllable construction from the point of view of monitoring and tightness. At the end of the operational life of the storage system, the cushion gas can be extracted just by injecting brine into the cavern. This article presents a geomechanical case study of hydrogen storage in salt caverns in a speculative geological site within the boundary limits found in evaporite basins (Moriak 2008, 2012). It will also be presented the design of caverns in the same geological site to store natural gas with high content of CO2. It will demonstrate the patented technology of gravitational separation of natural gas and CO2 that occurs inside the salt caverns, as the density of the CO2 is larger than the natural gas (Costa, 2018).
A New Technology of Combined Network Fracturing for Shale Oil Reservoir in Jiyang Depression
Authors: Zhu Haiyan , Huang Chuhao , Tang Xuanhe , Tao Lei , Zhao Peng , Zhang Zhaopeng , Wang Jiandong , Zhang Liaoyuan , Zhou Guangqing
Published: November 2023

The resources of Paleogene shale oil reservoirs in Jiyang depression of Bohai Bay are very rich. However, compared with other shale oil reservoirs, Jiyang Depression has a deeper burial depth, complex structure, stronger heterogeneity, more developed bedding fractures, and poor crude oil mobility. Conventional fracturing technology generally has low fracturing efficiency, leading to low production and fast attenuation after fracturing. In general, there are the following scientific problems: 1) it is difficult to evaluate the fracturing sweet spot of reservoirs with high stress, high plasticity, and strong heterogeneity reservoirs, and it is difficult to effectively guide the well and fracturing section selection; 2) it is difficult for hydraulic fractures to cross through multiple shale layers in reservoirs with developed bedding fractures; 3) It is difficult for conventional continuous sanding fracturing to meet the special demand of high viscous crude oil for high conductivity of fracture network. To solve the problems, a new technology of combined network fracturing is proposed. The technology has been applied to shale oil reservoirs in Jiyang Depression, and has continuously broken the record for the highest daily production of shale oil in China, which supports the construction of the "Jiyang Depression Shale Oil National Demonstration Zone".
Evaluation of Different Tree-Based Machine Learning Approaches for Formation Lithology Classification
Authors: Al-Khudafi Abbas M. , Al-Sharifi Hamzah A. , Hamada Ghareb M. , Bamaga Mohamed A. , Kadi Abdulrahman A. , Al-Gathe A. A.
Published: November 2023

This study aims to assess the effectiveness of several decision tree techniques for identifying formation lithology. 20966 data points from 4 wells were used to create the study's data. Lithology is determined using seven log parameters. The seven log parameters are the density log, neutron log, sonic log, gamma ray log, deep latero log, shallow latero log, and resistivity log. Different decision tree-based algorithms for classification approaches were applied. six typical machine learning models, namely the, Random Forest. Random trees, J48, reduced-error pruning decision trees, logistic model trees, HoeffdingTree were evaluated for formation lithology identification using well logging data. The obtained results shows that the random forest model, out of the proposed decision tree models, performed best at lithology identification, with precession, recall, and F-score values of 0.913, 0.914, and 0.913, respectively. Random trees Random trees came next. With average precision, recall, and F1-score of 0.837, 0.84, and 0.837, respectively, the J48 model came in third place. The HoeffdingTree classification model, however, showed the worst performance. We conclude that boosting strategies enhance the performance of tree-based models. Evaluation of prediction capability of models is also carried out using different datasets.
Pragmatic Methodology for Evaluation of Geomechanical Risks During Feasibility Assessment of Fields for CO2 Geological Storage
Authors: Musa I. H. , Tan C. P. , Leem J. , Tiwari P. K.
Published: November 2023

As part of on-going efforts to reduce the impact of climate change, carbon dioxide (CO2) emission is captured and reinjected into underground formations as part of carbon capture and storage (CCS) projects. Geomechanical risks assessment which is part of CCS feasibility study was conducted in Field A. The pragmatic methodology for geomechanical risk assessment in Field A begins with selection of wells with adequate data for 1D geomechanical models construction. Once the models have been generated, rock mechanical properties, pore pressure and stresses are extracted as inputs for caprock integrity analysis. Taking into account the impact of pore pressure increase on horizontal stress changes in the reservoir and caprock, maximum injection pressure at the formations of interest is determined. Fault stability analysis is then performed on the faults in the field which show that all the faults remained stable throughout CO2 injection. The resultant seabed uplift assessed is low at the end of injection period. The feasibility study has move to storage development plan stage which involved 4D coupled geomechanics dynamic modeling.
Shale and Sand Pore Pressure Disequilibrium – Challenges and Mitigation Strategy
Authors: Wijnands F. , M Haata S. N. , A Hanis H. , Sau H. Y. , A Rani A. S.
Published: November 2023

Accurate pore pressure prediction and real-time interpretation are essential for safe and economical well construction but have been notoriously challenging in the Baram Delta, Offshore Sarawak, Malaysia. Field B consists of stacked sands of deltaic origin, dissected by faults that subdivide the anticline into 6 fault blocks, with steep overpressure ramps that occur at different stratigraphic layers and depths. The overpressure signatures on porosity-proxy logs (Resistivity, Sonic, Seismic Interval Velocity) are not prominent, which poses large uncertainties for Pore Pressure analysis and suggests a main overpressure mechanism other than undercompaction. Such behaviour is common in all Baram Delta fields. Our observations indicate that the overpressure is controlled by charging along faults. Deeper sands have four-way fault closure and can retain overpressure and hydrocarbons. Shallower sands rely partly on dip closure and cannot retain pressure, which can lead to large pressure ramps over a single reservoir-seal pair. Shale and sand pressures are often not at equilibrium within the ramp, necessitating the use of formation pressure measurements while drilling to ensure safe well construction and completion operations.
A Preliminary Geomechanical Study of Underground Hydrogen Storage in the Inyan Kara Saline Aquifer in the Williston Basin
Authors: Laalam A. , Tomomewo O. S. , Chellal H.A.K.
Published: November 2023

Hydrogen, as a low-carbon energy carrier, presents a promising solution for energy storage, especially to counterbalance the variability in renewable energy sources. This investigation evaluates the feasibility of underground hydrogen storage within saline aquifers, with an emphasis on the Inyan Kara formation located in the Williston Basin, North Dakota. Through a 3D hydro-mechanical simulation, the study explores both the capacity of this specific aquifer for hydrogen containment and the consequent hydraulic and geomechanical impacts of multiple hydrogen injection and extraction cycles. The adopted methodology seamlessly integrates a comprehensive 3D geomechanical model with invaluable field data, such as formation pressure measurements and insights derived from density and acoustic logs. Preliminary outcomes suggest a favorable recovery rate, with an estimated 76% of the injected hydrogen being retrievable in a 3 months injection-3 months production framework. Further, by employing the Mohr-Coulomb failure criteria and one-way coupling scheme, the research underscores the robustness and safety of this underground storage technique, emphasizing its potential in harmonizing renewable energy fluctuations.
Fractures Characterization and Their Impact on the Development of a Tight Oil Field
Authors: Conde Oliver Rojas , Silva Henry Galvis , Doghmane Mohamed Zinelabidine
Published: November 2023

Revived interest in the Hassi Toumiet area has been sparked by oil discoveries in the Ordovician Formation near Hassi Messaoud field. However, the Hamra Quartzite reservoir in Hassi Toumiet has thinned and has poor quality compared to the Hassi Guettar field. Several studies have been conducted further research in Hassi Toumiet, located north of the Amguid-El-Biod axis, through 3D seismic and wells, resulting in new discoveries. Understanding the natural fractures in the area is crucial for its development, so a study was done using core samples, borehole imagery, and 3D seismic data. The study found three fault networks, with the dominant orientation being ENE-WSW and secondary orientation being NW-SE. Analysis of well cores showed low density of mostly cemented fractures, confirmed by borehole imagery. The fractures were found to be sparse, poorly connected, and strongly cemented, but this should be taken into consideration with respect to the well's verticality.
Enhanced Geothermal Systems: The Effect of Hydraulic Fracture and Rock Matrix Permeability
Authors: Sfeir Jerome , Moridis George , Briaud Jean-Louis
Published: November 2023

Geothermal energy has been proven to be an excellent candidate to break-in the future energy mix, being a reliable, green and baseload source of energy. A lot of investments into this field are helping overcome previous limitations via new approaches and technologies. One of these technologies is EGS – Enhanced Geothermal Systems. This article presents a sensitivity analysis of an Enhanced Geothermal System (EGS) with respect to two permeability parameters. A base case is set up reflecting typical geothermal conditions for an EGS reservoir and then two variations will be made 1) achieved HF permeability and 2) rock matrix permeability. The response of the EGS to these changes is analyzed by studying all thermodynamic metrics on a global reservoir scale and at areas of interest. This study is conducted via numerical simulation using the TOUGH+RGB code of the Lawrence Berkley National Laboratory. The results show that these two permeability parameters have a major impact on the hydraulic and thermal performance of the EGS from both the short term and long-term perspectives.
Energy Storage in Salt Caverns with Supercritical and Transcritical CO2
Authors: Minkley Wolfgang , Brandt Matthias , Naumann Dirk , Stepanek Jan , Dostal Vaclav
Published: November 2023

We propose an innovative underground energy storage based on supercritical CO2 as a working fluid. The storage allows generation of electrical energy for hours, and therefore represents an ideal mean to compensate for the natural fluctuation in electricity generation from renewable energy throughout a day. The storage makes use of underground salt caverns, which allow the containerless storage of millions of cubic meters of the working fluid. Last generation supercritical CO2 turbine and compressor technology is employed. This combination allows for a very small surface area usage, which makes it superior in this regard to pumped hydro storage, and an ideal candidate for the densely populated areas of, for example, northwestern Europe. In the cycle, energy is stored by compressing the working fluid from a low-pressure cavern or surface container to the high-pressure cavern when excess electricity from renewable sources is available. Energy is extracted in the reverse operation. Cycle efficiencies of over 50% can be realized. If the thermodynamical cycle is allowed to fall below the critical pressure, the conversion of work to heat increases. With the larger pressure swing (transcritical cycle), and the addition of the stored heat, the total energy in the system can be increased significantly.
Caprock Fault Permeability Change with Reactivation: Experimental Review of Operational Constraints
Authors: Busson J. , Castets M. , Bourgeois F. , Barlet P. , Borgomano J.V.M. , Su K. , Wibberley C.A.J.
Published: November 2023

Measurements of fracture-parallel permeability with shear slip under varying normal effective stress are presented from our original work and four reviewed publications on caprock lithologies. They demonstrate the existence of a normal effective stress threshold under which permeability increases with shear slip, and above which permeability decreases. Variations of fracture mechanical aperture with shear slip and ratio to equivalent hydraulic opening are also measured. Shear slip can lead to fracture-or fault-parallel permeability multiplication by 2 to 4 orders of magnitude, but only below a given normal effective stress value (estimated as 5 to 20% of the caprock UCS). These results give a robust relation between fracture and fault shear slip and permeability evolution for operational decisions and numerical simulation relative to subsurface integrity.
Optimizing Fishbone Multilateral Well Productivity Forecasting with Machine Learning Techniques
Authors: Silva Henry Galvis , Conde Oliver Rojas , Khalifa Houdaifa , Benarbia Achouak , Montes Jose Carlos Cardenas
Published: November 2023

Fishbone drilling (FbD), a premier method in multilateral well drilling, has been adopted in numerous global hydrocarbon fields. Its application leads to notable improvements in recovery rates while diminishing carbon emissions from the drilling process. The essence of FbD lies in constructing several minor holes that radiate in diverse directions. However, a significant obstacle with Fishbone drilling is the absence of comprehensive models to understand the impact of each Fishbone variable on total production, and their interplay. This research delves into the intricacies of fishbone well productivity prediction by leveraging a suite of machine learning algorithms, including RandomForest, GradientBoost, LinearSVC, AdaBoost, and KNeighbors. Through extensive model evaluation metrics such as MSE, RMSE, MAE, and the R-squared score, the study offers insights into the relative weightage of input features, with bottom-hole pressure emerging as paramount. The culmination of the research is the DrillFish Web App, an innovative platform designed for industry professionals to predict fluid flowrate and optimize fishbone drilling designs.
A Multi-Scale Homogenized Hydro-Mechanical Coupled Model for Fractured Rocks
Authors: Liu Wu , Shang Jinhang , Jiang Hao , Yao Huayan
Published: November 2023

Based on the multi-scale structural characteristics of fractured rocks, a hydro-mechanical coupled model was formulated by a multi-scale homogenization method under the framework of thermodynamics. The proposed model simultaneously accounts for the deformation and permeability variation in fractured rocks induced by the structural alterations of both arbitrarily-distributed microcracks of smaller scales and group-orientated fractures of much larger scales under coupled hydro-mechanical loadings. The impacts of many important mechanisms are considered, such as the interstitial water pressure, microcrack initiation and propagation, normal stiffness recovery caused by microcrack compression closure, frictional sliding of closed microcracks, shear sliding and dilatancy of fractures, fracture surface asperities degradation. Numerical simulations of Stripa tunnel excavation performed with the proposed model, show that it’s important to account for the variations of both small-scale microcracks and large-scale fractures for better characterizing the excavation-induced permeability change in the area adjacent to the excavation face.
Discrete Element Modelling of Deep Cemented Sandstone Formation Using Adhesive Elastoplastic Contact Model
Authors: Khamitov F. , Shabdirova A. , Zhao Y. , Minh N. H.
Published: November 2023

The Thornton-Ning (TN) contact model, originally designed for self-adhesive spherical particles, was implemented into the Aspherix® commercial software, and then modified to simulate the behavior of cemented sandstone material. During the initial phase of software development, the implementation of the TN model underwent successful validation. In the subsequent phase, the TN model was adapted to replicate the characteristics of a weak cemented sandstone material. Three new assumptions were used: 1) bond breakage was defined as the point of maximum negative force, 2) bonding occurred only once during the formation of the geological material in the sample preparation, and 3) bond breakage occurred under subsequent loading conditions, any new contact was not bonded and hence modelled using the non-adhesive elastoplastic equation of the TN model. To simulate the diagenesis of sandstone material at significant reservoir depths, one-dimensional DEM compression was performed; the applied vertical stresses covered the stress range in an oil-gas reservoir. By employing an elastoplastic contact and bond model, a more realistic constitutive behavior can be achieved as compared to prior studies on the same material utilizing the purely elastic Hertz contact model.
Stability Analysis of the Surrounding Rock of a Super-Large Diameter Shield Tunnel in Karst Strata
Authors: Cui Lan , Li Gang , Kou Hong-gang , Chang Liu-ming
Published: November 2023

Based on the tunnel project at the south extension of Wuhan Heping Avenue (Zhongshan Road-Zhangzhidong Road), finite element analyses are conducted to analyse the deformation and stress characteristics of the surrounding rock and the lining of a super-large diameter shield tunnel passing through karst strata and the effect of the ground loss during the shield construction process on the stability of the karst caves and the surrounding rock of the tunnel is discussed. Analysis results show that when the diameter of the karst cave is large, the deformation of the tunnel moves towards the location of the karst cave and the local region of the tunnel close to the karst cave bears a greater force, which should be paid more attention to in the engineering practice. Results also show that the karst cave above the tunnel increases the maximum settlement of the ground surface and may lead to ground subsidence and other engineering disasters. During construction, small ground loss should be ensured as large ground loss will result in obvious ground subsidence. The research outcomes from this study can be used as a reference for similar engineering projects.
Investigating Thermal Gradient Cracking and Fracture Process Zone Development in Granitic Rocks
Authors: Aboayanah Kareem Ramzy , Sun Lei , Grasselli Giovanni
Published: November 2023

Thermal stresses developed under disturbed temperature field induce thermal cracking when material’s strength is exceeded. In this paper, digital image correlation (DIC) and thermo-mechanical finite-discrete element method (FDEM-TM) simulations were adopted to investigate thermal gradient cracking and the evolution of its fracture process zone in Stanstead granite. DIC results showed that thermal gradient cracks initiated in a radial pattern from the heating source and the spatial density of the cracks was higher closer to the heating source than at the sample periphery. The macrocrack coalesced from the cooler portion of the sample inwards; however, smaller cracks initiated first from the hole before the coalescence. FDEM-TM simulations, supported by DIC experimental observations, revealed that thermal gradient cracks initiate as a result of an advancing tensile hoop stress front induced by the transient temperature diffusion in the rock. Therefore, the location of the thermal gradient crack initiation depends on both the local material tensile strength and the magnitude of the local induced tensile stress. Analysis of the thermal gradient fracture process zone (TG-FPZ) showed that maximum TG-FPZ length occurred at the onset of traction-free macrocrack propagation and decreased gradually until the macrocrack reached the heating hole. TG-FPZ width increased along the macrocrack length from the sample periphery towards the heating hole. This is attributed to the pronounced differential expansion mechanism in the hotter near-hole region and the induced tensile hoop stresses later in the heating stage when the macrocrack approached the hole.
Advanced Seismic Interpretation, Multivariate Attribute Analysis, and Petrophysical Evaluation Techniques for Holistic Structural and Reservoir Characterization of the Joya Mair Oilfield, NW-Himalayas, Pakistan
Authors: Fayyaz Najwa , Ahsan Naveed , Ali Abid
Published: November 2023

Seismic and Petrophysical techniques were applied to illustrate subsurface structural analysis and reservoir characterization. Seismic assessment is essential for characterizing the underground anatomy and analyzing the petroleum prospects of the designated geographical region. Density, Resistivity, Caliper, Neutron porosity, photoelectric absorption (PEFZ), Gamma-ray, and spontaneous potential logs were used to carry out petrophysical analysis. A standard logging mechanism for fracture demarcation has been addressed in the present research. The investigated site is situated in Pakistan’s Upper Indus Basin which is split apart by the Potwar and Kohat regions. Minwal X-1 well located in Joya Mair oilfield has been chosen for this study. The area possesses a triangular domain resulting from compressional tectonic movements. The Minwal-Joyamair field has a distinctive history of hydrocarbon production with complicated stratigraphy and structure. Fracture porosity drives the emergence of Eocene limestone strata. The existence of fractured zones in the Chorgali formation and Sakesar limestone is demonstrated by using well-log responses along with the Secondary Porosity Index (SPI). Researchers can benefit through the method of figuring out hydrocarbon regions with the assistance of traditional well logging. The evidence of fracturing in Eocene limestone is confirmed through all the conventional log responses and cross-plots.
A New Confined Swelling Test for Improved Fluid-Shale Compatibility Evaluation
Authors: van Oort E. , Thombare A. , Aldin M.
Published: November 2023

Atmospheric shale swelling tests are widely used today to investigate shale-fluid compatibility, and to develop and select new drilling fluid formulations. Linear swell meter and similar tests, however, often give erroneous and misleading results due to test artefacts. In this paper, we describe a new confined swelling test that overcomes the drawbacks of atmospheric shale swelling tests using well-preserved, unaltered shale samples in triaxial rock mechanical test equipment, allowing shale to be subjected to downhole temperature, in-situ stress and pore-pressure conditions. Cylindrical samples are exposed on their outer boundaries to test fluid applied through a permeable sand pack. Strain responses are measured throughout the test, with axial, radial and total volumetric strain responses characterizing the volumetric expansion of the sample as it is unloaded in successive steps. The sample never experiences zero stress / pressure conditions. After testing, the strain response is plotted as a function of applied octahedral stress to characterize a swelling index. The test in this regard is very similar to the simple oedometer swelling test used in soil mechanics, but with the key differences that much more sophisticated rock mechanical equipment is used and the sample is tested under simulated downhole conditions. Confined swelling test results can be – and have been – used to better select and optimize shale drilling fluids in the field.
Time-Lapse Saturation Monitoring for Miscible Water Alternating Gas Injection
Authors: Dehdouh Abdesselem , Mellal Ilyas , Larkem Oussama
Published: November 2023

Implementing a Water Alternating Gas (WAG) project involves huge capital expenses; thus, pilot projects are crucial for assessing the performance and effectiveness of WAG injection, providing valuable insights into technical aspects, project economics, profitability, and operational risks. This study evaluated the performance of miscible WAG injection using time-lapse saturation measurements for a compartmentalized sandstone reservoir. Petrophysical and geological analyses were conducted for pilot project site selection. One injector and one observation well with 525 ft separation were proposed for this study. Modular Dynamic Tester (MDT) tests were performed for each well to evaluate connectivity within the reservoir layers, and build-up and fall-off tests were performed during each cycle to assess the skin value and identify potential issues with injectivity. The project spanned 40 months and consisted of four cycles, with WAG ration of 0.853. The collected data were extensively analyzed to closely monitor and gain a deeper understanding of (WAG) injection during the project. Integrating findings from various test analyses enabled more effective monitoring of the WAG injection process and provided a better understanding of sweep efficiency performance, accounting for multiple operational interferences. The results demonstrated a decrease in total hydrocarbon saturation to below 10% which can yield an incremental recovery of 14% of OOIP .
Gaussian KISS Models of Well EUR: Improving Hydraulic Fracturing Treatment Design and Boosting Well Performance by Choosing Optimum Proppant Fines based on Rapid Sensitivity Analysis
Authors: Weijermars Ruud
Published: November 2023

Hydraulic fracturing advancements have made shale and tight sand extraction economically viable, yet recovery rates remain low. This study stresses that despite best practices, improving shale well performance hinges on enhanced engineering. History-matching of well data from the DOE HFTS-1 field experiment has revealed critical fracture half-lengths range between 95 and 229 ft, and identified a 25% failure rate in establishing hydraulic fractures from the perforation clusters. Meanwhile, fracturing-simulation models mislead us by suggesting impractical (i.e., practically not feasible) scenarios of proppant packs reaching the tips of the successful hydraulic fractures. Field tests contradict the simulator predictions, revealing that the hydraulic fractures have partially closed again after the frac pumping ceased, while they were initially opened. The closure occurs due to proppant absence, settling instead close to the wellbore. Efficient proppant delivery is therefore crucial for keeping the fractures open and conductive. Because premature proppant settling and duning occurs near the perforation clusters, addressing the engineering challenge of improved proppant delivery is vital for creating optimal fracture conductivity. The enhanced fracture conductivity is needed to improve the recovery factors in shale and tight sand formations. This study emphasizes the importance of using real-world observations and history-matching of the well performance for selecting the optimum mixture of proppant fines and types. Likewise, the significance of using KISS-models (Keep-It-Simple-Stupid) is emphasized. Such models, while sufficiently accurate in their predictive power, provide the added benefit of allowing for fast iterative computations in spreadsheets to determine the optimum engineering solution. Computational examples are given based on analytical solution methods rooted in a new Gaussian solution of the pressure diffusivity equation.
Analisis Solusi Permasalahan Zakat Produktif
Authors: Fauziah Khusnul , Kurniawan Naufal
Published: November 2023

Philanthropy is generosity, generosity, social contribution or something that shows love for humans. Philanthropy is an alternative that is used to reduce social inequality, create life benefits and improve people's welfare, such as through the empowerment of productive endowments. However, currently in Banjarnegara not many waqf are managed productively. This study aims to analyze the problems of productive waqf and their solutions in Banjarnegara Regency. The method used is descriptive method, while data collection is done by examining and exploring data sources or other information relevant to the study. The results obtained explain that the problems causing waqf management in Banjarnegara Regency are not optimal and the solution is divided into three aspects, namely human resource aspects, institutional aspects and government aspects. The aspects of human resource problems have the greatest influence compared to other aspects. The solutions that most affect the level of management of waqf assets are outreach and education to the public, increasing coordination with other related institutions and waive the cost of certifying waqf land.
Dukungan Keluarga Dan PMO Yang Mempengaruhi Kepatuhan Pasien TB Dalam Mengkonsumsi Obat
Authors: Willem Willi , Rukmana Nova Mega , Arief Hermawan Nur Sefa , Rinfilia Indah
Published: November 2023

The low rate of recovery coverage and success of tuberculosis is a bad risk and is a serious problem for public health status.The success of tuberculosis is greatly influenced by obedience to treatment.In the town of the king's city., from the existing data of 30 puskemmas, no one has reached target 100 % success, treatment success rate is only 79.9 %.The success of tuberculosis is greatly influenced by obedience to treatment.The purpose of research to find out the relationship of family support and the role of pmo with the patient's obedience in ingesting drugs.Kind of categorical research, cross sectional design.Sample number 33 people.Data collecting method by interviewing using questionnaires.Spamling consecutive sampling technique.Research results, say there's a family support connection p-value 0.038, and pmo role with p-value 0.010
Analisis Pemeriksaan Bilirubin Total Berdasarkan Variasi Waktu Paparan Cahaya Lampu Pada Spesimen
Authors: Sari Dwi Wulan , Kesuma Suryanata , Kusumawati Nursalinda
Published: November 2023

Pre-exam stage one of the most important stages in a laboratory examination which includes patient preparation, specimen reception, specimen processing, identification of specimens and preparation of reagents to be used. Specimens that are not immediately examined can cause the results of the total bilirubin examination to become unstable due to exposure to light which affects the properties of the bilirubin so that the concentration of bilirubin levels in the serum decreases. The purpose of this study was to determine the results of total bilirubin examination based on variations in exposure time to light on the specimens. This research isstudy true experimentby designrandomized pretest-posttest control groupwith 3 treatments, namely exposure to laboratory light on serum specimens for total bilirubin examination (2, 4, and 24 hours). This research was conducted in the hematology and clinical chemistry laboratories, medical laboratory technology department at the East Kalimantan Ministry of Health Polytechnic with a total sample of 40 people. The population in this study were students majoring in medical laboratory technology at the East Kalimantan Ministry of Health Polytechnic. The measurement method used in this research is methodEndPointData analysis used isOne Way ANOVA. The results obtained were clinically and statistically different in the ANOVA test which showed that exposure to light at various times of 2, 4, and 24 hours had a significant effect.
Track & Field
Authors: Struder Heiko , Jonath Ulrich , Scholz Kai
Published: November 2023

This book is officially certified by World Athletics (WA) and is the most comprehensive guide on track & field currently available. Track & Field outlines in detail the cross-disciplinary aspects of training and presents the information as small training theory, which enhances understanding of the special training and movement theory of the various disciplines also presented. Introduced in this book are the basics of training theory, such as main motor stress forms; adaptation and performance; training control; training methods; and general training concepts. The comprehensive training content also includes 96 games and exercises for coordination, flexibility, and strength development. The book goes even further than training method by presenting comparisons of different disciplines, history of training, competition rules, phase structure, and technique, all backed by sports science. It is a textbook for all athletes, coaches, trainers, and sports students and teachers from youth athletics to high-performance training. Also included is a foreword by WA president, Sebastian Coe.
Phänomene regressiver Nachrichtenrezeption
Authors: Schülke André
Published: November 2023

One phenomenon of modernity on which media ethics comments is the challenge to reason by the boom in non-rational world views. Since we are exposed to a constant stream of apocalyptic news every day, there is reason to examine news for its effect as a precursor of non-rational mental models of reality in the consciousness of its recipients. A model of cerebral information and knowledge processing by the sociologist Walter L. Bühl can be used to explain why many media users tend to align their actions with mythical, conspiracy-affiliated, anti-scientific and fundamentalist world views, thus calling into question fundamental achievements of the Enlightenment.
CPC-EM Full Issue Text
Authors: Valenzi Nicole
Published: November 2023

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A kutatás szabadsága és az ügynökmúlt feltárása
Authors: Bán-Forgács Nóra
Published: November 2023

This article examines the relationship between freedom of research and the Hungarian Data Protection Ombudsman’s interpretation of fundamental rights through the case law of the Ombudsman. The DPO’s activities in dismantling the state party, the discovery of data of public interest, and the development of fundamental rights in this context constitute an integral part of his jurisprudence. The article points out that in understanding the Hungarian regime change in 1989 and the following decade, it is essential to clarify Hungary’s relationship with its own political past, including the value judgement on political crimes, the exploration of the past, the processing of the past for scientific and artistic purposes, and the taking of positions on all issues that could not be subject to public debate and deliberation during the dictatorship. We consider this to be the case not only with regard to the communist past but also with regard to research into the persecution of the Second World War after the change of regime.