bluuebunny/crossref_metadata_2025_split huggingface dataset:
Memorias del Primer Encuentro de Investigación en Seguridad y Salud en el Trabajo
Authors: Vivas-Manrique Samuel David 
Published: February 2020

La investigación en el campo del ser humano y su entorno laboral requiere ser fortalecido en los programas de formación de pregrado y posgrado, de modo que cada vez sea mayor el conocimiento que desde los claustros universitarios se genera por parte de investigadores, docentes, estudiantes, grupos y semilleros de investigación. Este es un ejercicio a realizarse en red, pues las alianzas académicas facilitan la creación, desarrollo y divulgación de proyectos que enriquecen el saber - hacer de la disciplina en pro de la protección y prevención de los riesgos laborales que pueden afectar el bienestar y calidad de vida del trabajador y la continuidad de las organizaciones. Con este propósito, la Universidad Libre y la Corporación Universitaria Minuto de Dios, ambas con sede en Cali, Colombia, realizaron el Primer Encuentro de Investigación en Seguridad y Salud en el Trabajo, llevado a cabo el 6 de junio de 2019, cuyo objetivo fue el de propiciar un espacio para la divulgación de los avances y resultados de investigación de los docentes, estudiantes y semilleros de las universidades del Suroccidente colombiano que ofrecen programas de pregrado y posgrado relacionados con la Seguridad y Salud en el Trabajo. Bajo la metodología de ponencias orales, póster y taller, docentes investigadores, estudiantes y semilleristas de las universidades Santiago de Cali, Antonio José Camacho, Libre de Cali, Uniminuto sedes Buga, Buenaventura, Pereira y Cali presentaron sus propuestas, avances y resultados de proyectos de investigación en curso o finalizados en temas de salud mental laboral, riesgo psisoocial, discapacidad y trabajo, peligros emergentes, teletrabajo, peligros físicos, biomecánicos y químicos. Estas son las memorias de un primer encuentro que espera consolidarse como un espacio donde la investigación es la protagonista en la búsqueda de entornos laborales que protejan la vida, el bienestar y la salud de los trabajadores, beneficiando también con ello a las organizaciones y sistemas de seguridad y riesgos laborales.
ITD Data Quality Maturity (A Case Study)
Authors: Zangana Hewa Majeed 
Published: February 2020

Nowadays, more and more organizations are realizing of importance of their data, because it can be considered as an important asset in present nearly all business organizational processes. Information Technology Division (ITD) is a department in the International Islamic University Malaysia (IIUM) that consolidates efforts in providing IT services to the university.
The university data management started with decentralized units, where each center or division has its own hardware and database system. Later it improved to become became centralized, and ITD is now trying to one policy across the whole university. This will optimize the high performance of data management in the university. A visit has been done to ITD building and a presentation has been conducted discussing many issues concerning data management quality maturity in IT division at IIUM. We got some notices like server’s room location, power supply and backup and existence of data redundant. These issues are discussed in details in the next sections of this paper and some recommendations are suggested to improve data quality in the university.
The quality of the data is very important in decision making, especially for a university that is trying to improve its strategy towards a research university and rise its rank among the World University Ranking.
The Development of Teaching Materials Lecture of Fiction Based Tidayu Culture Integrated Mobile Learning
Authors: Susan Neni Triani  , Eti Sunarsih  
Published: February 2020

This research based on students by difficulty in understanding analysis prose in lecture study prose fiction. Learning are now more led to the topic on local wisdom. West kalimantan constituting a province that has many tribes. Three large tribe living in west kalimantan, tionghua, dayak, and melayu. This study focused on tidayu folklore. So learning lecture study prose fiction developed into the development of material lecture prose fiction based tidayu culture integrated mobile learning. Problems in this research is how vaidty, practicality and effectivity whether the use of teaching lecture study prose fiction based tidayu culture integrated mobile learning in learning the prose fiction in STKIP singkawang. The research method used in this research is a research and Development (R&D) method of development with ADDIE research approach. The research period was held from March to July 2019 at the STKIP Singkawang. The test subjects in this study were students of the Bahasa dan Sastra Indonesia study Program of semester III as many as 17 students. Results of the study showed that the teaching materials of prose fiction based Tidayu culture integrated mobile learning in the students of Pendidikan Bahasa dan Sastra Indonesia program study STKIP Singkawang is valid, practical and effective in application on the learning process.

Keywords: development, prose fiction, tidayu culture, mobile learning
Development of Contextual Based Narrative Writing Module for Grade X Student of SMK
Authors: Putri Wulandari  , Awani Manurung  , Salamuddin Selian  
Published: February 2020

This study aims to describe the development of modules, validation of module development, and improve the learning outcomes of contextual based narrative writing. This research was conducted in class X SMK Ar-Rahman, Medan.The method used is a research and development method. Researchers use expert/expert validation and students to produce products and test the effectiveness of the product.The results obtained from this study: first, the development of contextual writing narrative essay writing modules is needed and appropriate by both teachers and students in the learning process.Second, the results of the validation carried out by experts / experts on the contextual writing narrative essay writing module are very good and worthy of being used as modules with an average percentage rating of 86% and are in the category of "very good", the results of individual trials obtained an average value an average of 87%, the results of small group trials obtained an average value of 88%, and the results of limited field trials obtained an average value of 92%.Third, the development of contextual writing narrative essay writing modules can improve student learning outcomes. This can be seen from the average pretest score of 61, while the average posttest score of 88 with an effectiveness level of 88% is in the "very good" category.

Keywords: development, module, writting narrative essays, contextual

Abstrak

Penelitian ini bertujuan untuk mendeskripsikan pengembangan modul, validasi pengembangan modul, dan meningkatkan hasil belajar menulis karangan narasi berbasis kontekstual. Penelitian ini dilakukan di kelas X SMK Ar-Rahman, Medan. Metode yang digunakan adalah metode penelitian dan pengembangan. Peneliti menggunakan validasi pakar/ahli dan siswa untuk menghasilkan produk serta menguji keefektifan produk. Hasil yang diperoleh dari penelitian ini: pertama, pengembangan modul menulis karangan narasi berbasis kontekstual sangat dibutuhkan dan sesuai oleh guru maupun siswa dalam proses pembelajaran. Kedua, hasil validasi yang dilakukan oleh pakar/ahli terhadap modul menulis karangan narasi berbasis kontekstual bernilai sangat baik dan layak digunakan sebagai modul dengan presentase penilaian rata-rata sebesar 86% dan berada pada kategori “sangat baik”, hasil uji coba perorangan diperoleh nilai rata-rata 87%, hasil uji coba kelompok kecil diperoleh nilai rata-rata 88%, dan hasil uji coba lapangan terbatas diperoleh nilai rata-rata 92%. Ketiga, pengembangan modul menulis karangan narasi berbasis kontekstual dinyatakan dapat meningkatkan hasil belajar siswa. Hal ini dapat dilihat dari nilai rata-rata pretest sebesar 61, sedangkan nilai rata-rata posttest sebesar 88 dengan tingkat efektivitas 88% berada pada kategori “sangat baik”.

Kata kunci: pengembangan, modul, menulis karangan narasi, kontekstual
Pendidikan Anti Hoaks Era 4.0 Perspektif Al-Qur’an
Authors: Shunhaji Akhmad 
Published: February 2020

Perkembangan teknologi komunikasi di Era 4.0, memunculkan berbagai macam berita hoaks yang dapat dikonsumsi oleh berbagai kalangan masyarakat. Munculnya berita hoaks yang demikian masif, telah dipaparkan dampak serta penyelesaiannya di dalam Al-Qur’an. Tetapi, sebagian besar masyarakat muslim belum menyadarinya. Tulisan ini, menggali ajaran-ajaran Al-Qur’an tentang kemungkinan adanya hoaks melalui berbagai perkembangan media dan penyelesaiannya. Dengan menggunakan pendekatan kualitatif deskriptif, Penulis memaparkan sebagian data hoaks yang berkembang di Era 4.0, melakukan kajian, dan menemukan langkah solutif untuk menyikapi hoaks menurut Al-Qur’an. Hoaks selalu terjadi dalam sejarah kehidupaan maanusia. Hoaks memiliki sisi negative yang merusak banyak pihak. Bahkan, hoaks dapat mengganggu stabilitas kehidupan. Oleh karena itu, hoaks perlu disikapi secara bijak. Pendidikan anti hoaks perspektif Al-Qur’an merupakan upaya maksimal dalam menyikapi hoaks melalui pengembangan kesadaran theogenetis. Dalam tulisan ini, ditemukan bahwa theogenetis merupakan potensi individu yang memiliki peran penting dalam menghadapi permasalahan hidup, termasuk menyikapi permasalahan hoaks secara bijak.
Kata Kunci: Pendidikan, Hoaks, Perspektif Al-Qur’an
An Innovative Spacer System Designed with Biodegradeable Polymer and Loss Circulation Material to Aid in Formation Damage Control
Authors: Ramos Violeta , Doan Angela , Ekwue Ann-Marie , Kellum Matthew 
Published: February 2020

Abstract
In offshore drilling technology, spacers are used prior to the cementing job for wellbore cleaning and improving cement bonding. Spacers are also used for remedial purposes such as formation damage control or prevention of further formation damage. Lost circulation is one of the major issues encountered when dealing with a damaged formation and must be assessed immediately and ceased before further issues occur. This proprietary spacer contains a blend of coarse, granular, organic, biodegradable material and can seal up to 4 mm gaps. In this paper, we discuss an optimum spacer with a novel biopolymer and loss circulation material which are used successfully for cementing jobs under challenging loss circulation conditions.
This study explains the performance of this optimum spacer. The optimum spacer has been successfully applied on offshore wells specifically for preventing and remediating lost circulation issues while cementing. The rheological properties of the spacer at both ambient and elevated temperature were analyzed and reported. The compatibility tests between the spacer and drilling fluid and cement slurry were also conducted along with the sealing properties of the spacer. The sealing properties were determined in a fluid loss cell with 20/40 frac sand, and were also tested through a particle plugging apparatus at various gap measurements.
In this study, spacer compositions and densities were adjusted to examine effects on rheology and stability of the solids within the system at ambient and elevated temperature. Also, this novel spacer improved the compatibility with synthetic/diesel-based drilling fluid and cement with less or no viscosification compared to commercial spacers. In addition, the spacer shows to effectively seal 20/40 frac sand at 100 psi as well up to a 4 mm gap at 1000 psi. The first case history for this technology has been successfully completed and are presented and discussed in detail.
The innovative spacer system is proven within this paper to add significant value to extreme cementing operations by improving and maintaining impressive sealing capabilities and can reduce formation breakdown and fallback of cement tops. The spacer comes along with advantages that include compatibility with various drilling fluids and cement. This spacer is environmentally friendly and applicable in both vertical and horizontal wells. In addition, the spacer will form a seal to minimize filtrate invasion into the formation, effectively reduce loss circulation and enhance hole-cleaning prior to cement placement.
Spatial and Temporal Patterns in Particle Retention in Vuggy Porous Media
Authors: Khan Hasan Javed , Prodanovic Maša , DiCarlo David 
Published: February 2020

Abstract
Permeability interpretation of well logs in carbonates is difficult due to the vuggy porosity and its connectivity and, on top of it, potential formation damage in and around the vugs. Here we perform an experimental study to determine how single and multiple vugs alter particle retention and ultimately permeability.
We previously devised a way to create repeatable vuggy media with different vug spatial distribution (Khan et al., 2019). Vugs are created by adding dissolvable salt inclusions to a 1.0 mm glass bead mixture placed in a graphite mold and sintering in a muffle furnace in the presence of air. Flooding the core after it cools dissolves the salt and creates void spaces. We then inject smaller-sized (50 micron) glass beads in the top-down direction in the porous medium, and perform time-lapsecomputed tomography (CT) scans for measuring spatial distribution of injected particles.
We find that initially the injected particles deposit at the upstream side of the vug, with minimum deposition in the matrix. Deeper in the core and at later times, the injected particles start depositing as a layer on the wall of the vug, reducing its cross-sectional area. Thickness of the layer increases with time, rough undulations fill out first, and results in a smooth exterior surface. The behavior rapidly changes as we go past the center of the vug (largest vug cross-section), with little to no particle deposition observed on the walls of the vug. The maximum change in this region is observed at the bottom of the vug, where the particles are trapped as they are exiting the vug. Deposition in the matrix increases with time, with particles being deposited later in the regions furthest away from the vug. We conclude that the flow converges at the top of the vug, resulting in higher particle-particle interactions and therefore higher deposition. The permeability contrast bends the streamlines towards the top half of the vug, with particles being deposited on the walls of the vug. In the bottom half of the vug, the streamlines are exiting along the side walls of the vug. Gravity dominates particle transport and they drop to the bottom of the vug.
We present a novel study that shows the development of particle retention patterns in a vug-matrix system over time and space and the influence of a vug on particle deposition in the matrix and/or the other vugs. This could potentially revolutionize permeability interpretation of well logs in vuggy carbonates.
Numerical Investigation of Wormhole Formation During Matrix Acidizing of Carbonate Rocks by Coupling Stokes-Brinkman Equation with Reactive Transport Model Under Radial Flow Conditions
Authors: Yuan Tao , Qin Guan 
Published: February 2020

Abstract
Matrix acidizing of carbonate formations has been widely used as a practical stimulation technique to improve well performance near the wellbore. The principle of a matrix acidizing treatment is to create wormholes by the dissolution of carbonate rocks. The dissolution pattern can affect the efficiency of the acidizing based on the flow conditions. The actual acidizing treatments are performed by injecting acidic fluid into the formation through a wellbore resulting in a radial flow in the porous media. Consequently, a mathematical model under radial flow conditions can accurately characterize mineral dissolution patterns, which provide valuable guidelines for designing of acidizing treatments.
In this paper, we have developed a 3D mathematical model that couples the Stokes-Brinkman equation and reactive-transport equations under radial flow conditions, which has been utilized for modeling the mineral dissolution processes during the acidizing treatment. We have developed and implemented a numerical procedure that solves the Stokes-Brinkman equation and the reactive transport equations by the staggered grid finite difference method and the control volume finite difference method in cylindrical coordinates, respectively, in a sequential fashion. Numerical validation and experiments have been performed using the proposed numerical solution procedure.
Two dimensionless numbers, Damköhler number (Da) and Peclet number (Pe), are used in the simulation study to characterize the competitive coupling effects among the advection, diffusion, and chemical reactions. We have performed the numerical experiments to investigate the type of dissolution correlated to the variations of Da and Pe numbers based on the synthetic radial core-flooding scenarios. The numerical results demonstrate that the proposed model is capable of describing the matrix acidizing treatments under radial flow conditions due to the advantage of the Stokes-Brinkman equation for flow in fractured porous media. The Da and Pe numbers are two crucial factors that can affect flow conditions, transport behavior of solute, and chemical reactions. Mineral dissolution patterns take different forms according to various Da and Pe numbers and various alterations of rock properties are obtained accordingly. In addition, the emergence of the wormhole structure during the injection of acid is discussed in this paper.
This work presents a 3D mathematical model allowing us to simulate a matrix acidizing process at exact downhole environments. We present the numerical experiments and sensitivity studies of mineral dissolution in carbonate rocks to investigate the coupling effect of fluid flow and reactive transport process on the wormhole formation for a better matrix acidizing design in field operations.
Upscaling Laboratory Formation Damage Test Data
Authors: Byrne Michael , Djayapertapa Lesmana , Watson Ken , Kandasamy Ram 
Published: February 2020

Abstract
Laboratory formation damage testing is often used to assist in the selection of optimum drilling and completion fluids. Most test procedures (e.g. sand retention, return permeability) represent an attempt to simulate near wellbore conditions during well construction and production. Return permeability tests may enable comparison of fluids and drilling and completion methods, but by definition remain small scale simulations. The permeability changes measured may be indicative but are rarely used to predict the overall impact on well performance. What degree of permeability impairment is allowable? Some further interpretation is required, which cannot be provided for using classical nodal analysis or reservoir simulation methods.
The impact of formation damage on overall well productivity or injectivity depends on the magnitude and distribution of the damage. In order to translate laboratory data into quantitative well predictions it is necessary to represent the degree of restriction and the geometry of the damaged zone or zones in a full well simulation. Computational Fluid Dynamics (CFD) simulations provide a means to upscale suitable laboratory test data to predict impact on well performance. Different magnitudes of damage derived from laboratory test data can be simulated and the impact on overall well performance predicted for different completion environments.
Upscaling reveals that in some wells laboratory measured formation damage has little impact on well performance. Of course if damage is severe then impact is severe but it is critical to consider the well length, reservoir quality, drive mechanism and the well completion in order to fully understand the implications suggested by laboratory test data.
This paper demonstrates through several case histories applications of CFD modelling to upscaling of laboratory measured formation damage. Moreover, the real implications for well and completion design are revealed. The value of laboratory testing is quantified and some interesting challenges to conventional wisdom are proposed.
Formation Damage Evaluation in Naturally Fractured Reservoirs Using a Laboratory-Calibrated Multi-Phase Flow Numerical Simulator
Authors: Díez Kelly , Bueno Nicolás , Mejía Juan , Restrepo Alejandro , Vallejo Juan 
Published: February 2020

Abstract
In this work a numerical simulation model is presented to evaluate the effect on productivity of the filtration, transport and retention of particulate material, as well as geomechanical effects during drilling operations in naturally fractured reservoirs. The model proposed consists of a Black Oil flow simulator developed under a dual permeability approach, coupled to a stress-sensitive fracture width and a filtration models. The phenomenological model studied allows to investigate the effect of the particulate material in the reduction of permeability due to the combined effect of the invasion of solids, and the sensitivity to stress. Laboratory oil displacement tests over a fractured core allowed to calibrate relative permeability curves and fracture conductivity. The system was then subjected to a dynamic filtration experiment, which captured filtration rates and volumes, enabling to calibrate filtration parameters. A successful match of volumes and pressures drop was obtained, assuring the representativeness of the whole model. A well simulation was performed to analyze the effect of fracture properties on productivity. This model complements an effort made by industry and academia to understand the filtration mechanisms occurring in naturally fractured reservoirs, maximize the laboratory investment by means of a unique phenomenological model that couples multiphase transport with solids entrance and mudcake build up equations. This model, together with current mud design technologies will help to novate the way the drilling fluids are being engineered to maximize investment return.