bluuebunny/crossref_metadata_2025 huggingface dataset:
Hubungan Jarak Kehamilan dan Paritas dengan Kejadian Berat Bayi Lahir Rendah (BBLR) di RSUD Embung Fatimah Kota Batam
Authors: Nelli Roza  , Andi Wilda Arianggara  , Ayu Rosanti Wilujeng  , Susi Endriani  , Tetiana Randhanie
Published: September 2023

Low birth weight infant are an important indicator for the reduction of Infant Mortality Rate and more than 95% of low birth weight infant is born in developing countries. Aware of data from Dinas Kesehatan Batam, low birth weight infant is the leading cause of death in infant. Even parity and non-optimal pregnancy spacing are the main factors in the occurrence of low birth weight infant. This study aims to determine the relationship between parity and distance of pregnancy with the incidence of low birth weight infant at RSUD Embung Fatimah Batam City. This study used a retrospective cohort research design using secondary data in the medical record section of RSUD Embung Fatimah Batam City. The study population was childbirth mothers, observed to assess whether the babies were born low or normal birth weight. The data analysis used in this study was univariable (descriptive), bivariable (chi-square), multivariable and (multiple logistic regression modeling). Stratification Test. The results of the analysis showed a significant relationship between parity and distance of pregnancy with the incidence of low birth weight infant. Mothers with at-risk parity were 4.565 times more likely to cause birth weight and 4.565 times more likely to have birth weight than mothers with non-risk parity (RR: 4.565, 95% CI, p-value 0.01 p<0.05). And mothers with a pregnancy gap of <36 or > 60 months were 2.556 times more likely to give birth to babies with low birth weight compared to mothers with a gestational gap of 36-60 months (RR: 4.556, 95% CI, p-value 0.01 p <0.05). So it can be concluded that parity and spacing of pregnancy have a significant relationship with the incidence of low birth weight infant.
Rural Michoacan: Economy, Migration, Population, Peasant Society, Regions, Water Resources
Authors: Fernández-Ruiz Guillermo , Mojica-Madrigal Oscar Ariel , Urquijo-Torres Pedro Sergio , Crespo-Stupková Lucie , Villagómez-Velázquez Ynaga
Published: September 2023

It is a characteristic of the condition of the human being, its sense of social interrelation since there is historical evidence that prehistoric person grouped and organized them to achieve various activities such as hunting, protection, war, and even selecting a partner for the consolidation of their clans or tribes. Once sedentary, it required more sophisticated forms of organization to practice agriculture and cattle raising and build their homes, cities, and diverse infrastructure. However, even though the usefulness of organizing has been evident to humanity, it was not until the 20th century which various thinkers, particularly in the area of ​​psychology, ventured into the deliberation of its design, implementation, as well as the causes and effects that have different organizational structures to use, more than anything, in the business field. In this way, this work is addressed to those who are insiders and outsiders to organizational innovation who need to know about the various structures that have been adopted throughout history and have a notion of how both the external and internal environment has influenced their development. Its definition. They are presented in various chapters so that it is known, in an approximate chronologically, what each current of organizational thought consists of, as well as learning the primary authors and their contribution works with discussions of their scope and limitations. Since the organization is an activity that is the product of the habits and customs that prevail in different periods of history, it is expected that the organizational models presented here will continue to evolve; In fact, it stands out that there is no single organizational innovation structure, but that it responds to a series of factors that, as will be discussed in the book, present themselves in various forms, according to the human group that analyzes them and their interests. You will be free to adopt to the best of your ability.
Estrategia didáctica para promover la autorregulación emocional en niños del área de inicial.
Authors: Montesdeoca-Moncayo Joselin Monserrate , Farfán-Casanova Olmedo
Published: September 2023

La autorregulación emocional en niños de inicial abarca la adquisición incipiente de habilidades para identificar y manejar sus emociones, sentando las bases para su desarrollo emocional y adaptación en contextos sociales y escolares. La presente investigación mantuvo la principal finalidad de elaborar un plan de actividades didácticas que signifiquen un apoyo para el manejo y autorregulación emocional en los niños del área de inicial de la Unidad educativa Eloy Alfaro en la ciudad de Bahía de Caráquez, la metodología emplea el

enfoque mixto (cuanti-cualitativo) ya que la información obtenida permitió dar a conocer los datos relevantes sobre las variables de estudio, se incluye la investigación de tipo descriptiva, además se emplearon métodos como el analítico, sintético, según el alcance temporal, el estudio fue de tipo transversal, la población de estudio estuvo conformada por 20 estudiantes que corresponden al total de niños y niñas del área de inicial de la unidad educativa mediante el método probabilístico aleatorio simple, además de incluir la participación de la docente del área de inicial de la institución,  se evidencia principalmente en los niños la habilidad de comunicarse y reflexionar acerca de las emociones, en cuanto a la identificación de las emociones en la actividad y reconocimiento de la situación que las genera, más del 65% de los niños muestran esta capacidad, lo que indica que la mayoría puede identificar las emociones que experimentan en diversas situaciones, por otro lado, En perspectiva a la ficha de observación, los resultados muestran un panorama mixto en cuanto al desarrollo emocional del niño.
Efectos toxicológicos causados por la preparación de quimioterapia: caso de estudio área de hematología
Authors: Muñoz-Cárdenas Fabián Santiago , Baculima-Suarez José Antonio
Published: September 2023

Las terapias ofrecidas a los pacientes con cáncer, incluidos los medicamentos citotóxicos, generan un alto riesgo para los profesionales de la salud involucrados en el proceso de atención del paciente. Los citostáticos son fármacos que inhiben el desarrollo de enfermedades neoplásicas. Por su alta toxicidad son muy agresivos. Por ello, cuando se trabaja manejando citostáticos, existen riesgos laborales previsibles con diferentes medidas, que mantienen la seguridad del profesional y del paciente. El objetivo del artículo es elaborar una propuesta de gestión de riesgos para el área de hematología oncológica del Hospital IEES de la ciudad Cuenca. Con una metodología de estudio de campo con enfoque cuantitativo y correlacional. Como resultados principales, el factor de riesgo más predominante en el área de hematología del Hospital es el de intoxicación por químicos, además se plantea una matriz de gestión de riesgos donde se incluyen medidas de control desde la jerarquía para mitigar el riesgo.
La revista de la Academia Nacional de Medicina de Colombia y su recorrido en 150 años
Authors: Jácome Roca Alfredo
Published: September 2023

FRAGMENTO.

La aparición en Europa de revistas científicas sobre temas médicos fue la consecuencia del descubrimiento de la imprenta por Gutenberg. Los tipógrafos de la época comenzaron editando libros (recordamos en particular la Biblia de 42 líneas en el siglo XV), que tenían como antecesores los libros clásicos reproducidos por los monjes copistas. Los ejemplares impresos antes del siglo XVI se han llamado incunables. Los grandes pensadores de aquellas épocas eran a la vez astrónomos, filósofos, frailes, botánicos, médicos, políticos y naturalistas. En el siglo XIX en Colombia, después de Caldas y Mutis, hubo algunos médicos que ejercieron después de que se corrigió aquel decreto de Santander que permitía el ejercicio de la medicina sin necesidad de título. Existieron entonces periódicos médicos pioneros -prematuramente desaparecidos- como La Lanceta, que se imprimió por primera vez el 17 de abril de 1852 y que ofrecía trabajos de medicina, historia natural, química y farmacia, o la Gaceta Médica, órgano de la Escuela Privada de Medicina que, a partir de 1864, creó y fomentó la conciencia de grupo en los médicos colombianos. Se hacía necesario el estudio y la comprensión de la patología nacional, por lo que después de crearse en 1859 la Sociedad de Naturalistas Neogranadinos, se estableció en 1873 la Sociedad de Medicina y Ciencias Naturales.
Importancia del índice de la revista de la Academia Nacional de Medicina
Authors: Rojas Nelson A. , Machetá Jenny Milena
Published: September 2023

FRAGMENTO.

El índice es una herramienta editorial útil y, en muchos casos; imprescindible que tiene sus primeros ejemplos en los códices romanos (codex) en los que se reunían textos de diferentes procedencias, en contraste con el volumen, ejemplar que solía versar en torno a un solo tema o ser de un único autor, para facilitar su consulta. A medida que el libro se fue expandiendo durante el Renacimiento y la Modernidad temprana como mecanismo de comunicación y de transmisión de conocimiento, los índices se consolidaron como parte constitutiva de las obras. En el caso de la revista de la Academia Nacional de Medicina, inicialmente titulada Revista Médica de Bogotá, estamos en el terreno de una publicación periódica seriada que sirvió de órgano de difusión de una sociedad científica, la Sociedad de Medicina y Ciencias Naturales transformada en 1890 en Academia Nacional de Medicina. Las revistas científicas, surgidas en el siglo XVII como resultado de los diversos géneros de intercambio y difusión de noticias científicas (libros, cartas, folletines, diarios, catálogos de libros, entre otros), transformaron la manera en que la ciencia circulaba. La gran mayoría de publicaciones siguieron el modelo del Journal des Sçavans, primera revista científica impresa en Europa, órgano de difusión de la Academia Francesa de Ciencias. Para mediados del siglo XIX, las revistas médicas –especializadas o no– se habían expandido gracias al interés mostrado tanto por profesionales del área, como del público general. Esta dinámica generó la aparición en 1879 del Index Medicus –publicación de la hoy National Library of Medicine de Estados Unidos–, un índice que buscaba enlistar los trabajos publicados en Estados Unidos en el área de la medicina para facilitar su consulta. Esta publicación es considerada como la precursora de herramientas como MEDLINE –hoy PubMed–.
Presentación del libro. Academia Nacional de Medicina de Colombia 1873-2023. Medicina, Ciencia y Humanismo
Authors: Gómez Gutiérrez Alberto
Published: September 2023

Fragmento:

La obra que se presenta hoy es producto de una iniciativa del presidente, doctor Germán Gamarra Hernández, quien convocó, con el aval de la Junta Directiva, a dos coeditores y, por consenso tripartito, a un grupo de 23 académicos para redactarla con ocasión del sesquicentenario de nuestra corporación. Su objetivo era simple: dar a conocer la historia de una sociedad médica, científica y humanista que ha reunido a protagonistas principales de la medicina nacional con más de un siglo y medio de ejecutorias.
Recapitulación. Centenario de la Academia Nacional de Medicina en 1973
Authors: De Medicina de Colombia Academia Nacional
Published: September 2023

Fragmento:

En la ciudad de Bogotá a los 23 días del mes de agosto de 1973 se reunió en Sesión Solemne la Academia Nacional de Medicina en el Salón de Actos de la Academia Colombiana de la Lengua, para conmemorar el Primer Centenario de su Fundación (1873-1973).

La Mesa Directiva estuvo integrada por el Señor Presidente de la República, Dr Misael Pastrana Borrero; los Académicos Juan Pablo Llinás, Presidente; Jorge Cavelier, Presidente Honorario; Mario Gaitán Yanguas, Vicepresidente; Julio Araújo Cuéllar, Secretario; Alberto Albornoz Plata, Tesorero y César A. Pantoja, Presidente del Comité Organizador del Centenario, acompañados por los Ministros de Salud Pública y Educación, Doctores José María Salazar Buchelli y Juan Jacobo Muñoz; El Gobernador de Cundinamarca, Doctor Alfonso Dávila Ortiz; el Alcalde Mayor de la ciudad doctor Aníbal Fernández de Soto; el Expresidente de la República Doctor Julio César Turbay Ayala; los doctores Eduardo Guzmán Esponda y Joaquín Piñeros Corpas, Presidente y Secretario Ejecutivo del Colegio Máximo de las Academias; el doctor Germán Zea Hernández y el doctor Armando Roa de Chile, Representante de la Asociación Latinoamericana de Academias Nacionales de Medicina (ALANAM).
THE EVALUATION OF SOLID SUBSTRATE FORMULATION OF METARHIZIUM ANISOPLIAE VAR. MAJOR (M-SS), AGAINST ORYCTES RHINOCEROS L. IN YOUNG OIL PALM PLANTATIONS
Authors:   Felda Global Ventures Research and Development Sdn Bhd, ZAINAL ABIDIN CIK MOHD RIZUAN , HAMID NOOR HISHAM , MAMAT MOHD ROZMI , MOHD SALEHAN NAZIHAH
Published: September 2023

The pathogenicity of Metarhizium anisopliae var. major - solid substrate (M-SS) was evaluated against Oryctes rhinoceros in a greenhouse and large-scale field study of new oil palm replanting areas. The M-SS was prepared by fermenting 500 g maize bran with 7 ml M. anisopliae mycelia liquid for 30 days to achieve M-SS viability of 91.45 per cent. The greenhouse study indicated that application of M-SS at 3.74 g per sq.m killed 92.17 per cent of the first, second and third instars larvae at six weeks after application (WAA) and is equally effective as commercially prepared Metarhizium formulated in powder form. Then, performance of M-SS in the field was tested in two replanting plots (28 ha and 33 ha) through a blanket application and artificial breeding sites (ABS) technique (50 ha), integrated with pheromone trap, which was manually applied on decomposing chipped oil palm biomass aged four to five months after felling and chipping (MAF). The result of these studies showed that 32.9- 42.6 per cent of 0. rhinoceros were infected especially on third and second instar larval at twenty-fourth and fourteenth month after application (MAA), respectively. These results indicate that M. anisopliae applied in the form of solid substrate was effective in controlling 0. rhinoceros population which would subsequently prevent the pest outbreaks in the oil palm- to - oil palm replanting areas. The M-SS form is easily prepared and very practical for use by the planters to control the target pest. Keywords: Metarhizium anisopliae, solid substrate, oilpalm replanting.
HERBICIDE SCREENING FOR THE CONTROL OF ROLANDRA FRUTICOSA
Authors:   PT Musim Mas, CHEONG YEW LOONG , BAHARUDDIN SUSANTO , CHANIAGO ELDAWATY , OOI LING HOAK
Published: September 2023

Several herbicides were screened to determine their efficacy against an invasive weed, Rolandra fruticose. Tank-mix of 44.5 ml glyphosate isopropylamine 48.6 per cent w/v plus 100 ml triclopyr butotyl-ethyl-ester (BEE) 67.0 per cent wlv in 10 L water and tank-mix of 75 ml glufosinate ammonium 15.0 per cent wlv plus 2.22 g saflufenacil 70 per cent wlw in 10 L water achieved 100 per cent kill at the fifth and first week after treatment respectively. The weed did not regenerate in both treatments at the eleventh week, the duration of the trial. In the second trial, the dosage was reduced by 50 per cent and 75 per cent for both treatments. At the reduced dosage, they were equally effective against this weed. A tank-mix of glyphosate isopropylamine and triclopyr BEE at the three rates evaluated in the second trial were repeated in a large commercial scale trial done by the estate. It was confirmed that the lowest dosage of 12 ml glyphosate isopropylamine 48.6 per cent wlv plus 25 ml triclopyr BEE 67. 0 per cent wlv in 10 L water was effective in controlling the weed. However, a follow-up spraying was required to eliminate the missed patches. The combination of 75 ml glufosinate ammonium 15.0 per cent wlv plus 2.22 g saflufenacil 70 per cent wlw in 10 L water also provided good control of R. fruticosa and could be recommended as an alternative. Keywords: Rolandra fruticosa, weed management, invasive weed.
Digital Competence and Strategic Thinking
Authors: Thahrim Muhammad , Jabid Abdullah W. , Sirat Abdul Hadi , Hadady Hartaty
Published: September 2023

This study aims to examine the relationship between digital competence and strategic thinking. This research was conducted in South Halmahera Regency. The population in this study are businesses located in South Halmahera Regency. The sample in the study was determined based on a purposive sampling approach. The requirements used in this study were that someone in the sample had a position as a small business leader who was already online with a maximum total asset of 500 million rupiah, totaling 179 respondents. Testing the hypothesis in this study using simple linear regression. The results of hypothesis testing show that the hypothesis is supported in this study. Next, recommendations for future research are discussed.
Anticataract activity of ethanolic extract from Hippobroma longiflora (L.) G.Don leaves: Ex vivo investigation
Authors: Imelda Eva , Khairan Khairan , Lubis Rodiah R. , Kemala Pati , Zulfiani Utari , Rahayu Suci , Idroes Ghazi M. , Adev Sarra M. , Maulydia Nur B. , Idroes Rinaldi
Published: September 2023

Context: In Aceh, Hippobroma longiflora, known as kitolod by the locals, is believed to possess medicinal benefits such as anticataract. Aims: To investigate the anticataract activity of ethanolic extract from H. longiflora leaves ex vivo. Methods: The dried fine powder of H. longiflora was macerated using ethanol at room temperature, and the concentrated extract was prepared in concentrations ranging from 100 to 300 μg/mL. The cataract model was established by using goat lens induced with H2O2 and later exposed to the extract for treatment. Anti-cataract activity was assessed by observing the change in lens opacity. Further, malondialdehyde levels and activities of endogenous antioxidants (superoxide dismutase, glutathione peroxidase, and catalase). Results: The apparent cataract opacity reduced after the exposure of the extract was observed macroscopically. The cataract eyes experienced a significant increase (p<0.05) in malondialdehyde level and a significant reduction (p<0.05) in the activities of superoxide dismutase, glutathione peroxidase, and catalase. The pathologic conditions could be reversed by introducing the extract with a concentration as low as 100 μg/mL (p<0.05). Conclusions: The ethanolic extract of H. longiflora leaf has a potential anticataract effect by ameliorating oxidative stress-related biocompounds.
Knowledge and Awareness about Oral Manifestations of Diabetes Mellitus Among Type -II Diabetes Patients in Chengalpet District, Tamil Nadu, India
Authors: Prabhu Subramani  , Aryasri Premarajan Kolankada  , Aparna Surendranathan Nair  , Amritha Blessy Juhi Julius  , Anith Musolini Krishnamoorthi  , Vishal Loganathan
Published: September 2023

Introduction : The aim of this study is to assess the knowledge and awareness about oral manifestations of diabetes among diabetic patients in Chengalpet district.
Materials and Methods : A cross- sectional study was conducted using a self-administered questionnaire consisting of different statements on knowledge and awareness of diabetic patients on the oral manifestations of diabetes mellitus (n = 153). The questionnaire included the demographic data, drug history, periodontal and dentition changes, their oral hygiene practices and their knowledge about the oral manifestations of diabetes mellitus.
Results : A total of n = 153 patients were included, n = 77 (50.3%) patients were male and n = 76 (49.6%) were female. The results of this study showed that a majority of people with diabetes are unaware of the bidirectional link between diabetes and its oral manifestations and they have limited knowledge of their risks for oral health problems. Majority of the patients were not aware about the oral manifestations such as Bleeding from gums n = 114 (75.1%), Burning Sensation n = 113 (74.3%), Altered Taste Sensation n = 118 (77.6%), Oral Malodourn = 125 (82.2%), Increase in Dental caries n = 105 (69.1%), Mobility of teeth n = 108 (71.1%). The results also showed that n = 73 (48%) of the participants were aware about the dryness of mouth.
Conclusion : Patients with diabetes mellitus are not well-informed or aware of the oral symptoms of the disease.
Relación del uso y conocimiento del plato del bien comer con la prevalencia de sobrepeso y obesidad de los estudiantes de un centro de estudios de nivel medio superior
Authors: Gallardo Casas Carlos Angel , Valadez Omaña Maria Teresa , Ibarra Valdovinos Itzelly , Correa Solís Emmanuel , García Hernández José
Published: September 2023

Esta investigación pretende identificar la relación entre el conocimiento y uso del Plato del Bien Comer (PBC) y la prevalencia de la obesidad y sobrepeso en estudiantes de un Centro de Estudios de nivel Medio Superior. Es un estudio descriptivo y transversal. Se realizó la evaluación de la composición corporal considerando el peso y la talla únicamente, y mediante el diseño de un instrumento se obtuvo la porción y el conocimiento del PBC considerado un recordatorio de 24 horas. Se estimó la distribución chi-cuadrada en programa de Excel 2016. Se encontró que a) prevalecer un estado nutricional de sobrepeso en mujeres y hombres, b) la obesidad prevalece en varones y c) se tiene conocimiento del PBC. En conclusión, la relación entre el uso y conocimiento del plato del PBC está estrechamente vinculado con la prevención de problemas de salud como la desnutrición, sobrepeso y obesidad.
Membangun Theatre of Mind Program Variety Radio “Santai Sejenak” Episode “Memories”
Authors: Harista Bekti Hanif , Oktora Dina Dwika
Published: September 2023

Creating a theater of mind for every listener is important, because radio is an auditory mass media. The process of forming a theater of mind for each person is different depending on how people imagine what they hear. The author uses sound elements in the form of voice, music and sound effects that are often played and heard in the past in forming a theater of mind for listeners on the Santai Sejenak radio variety program episode "Memories". The goal is to build a nostalgic feeling for the listeners. The response of listeners who then sent stories about their memories during the event was a form of success in building this nostalgia. This was done by combining several existing elements. Among them are music, words and sound effects. When listeners can feel nostalgic, it means that the director's task in forming a theater of mind has been successful. One way to prove it is that there is a response from the listeners who send the story.
Peran Penyunting pada Program Komedi Seperti Kopi (KSK) di Magna Channel
Authors: Lesmono Budi , Agustina Dwi Pela
Published: September 2023

The main problem in this study is the role of editor in program Komedi Seperti Kopi (KSK) that is being broadcast in Magna Channel; both the roles as a video editor and a technical concocter in editing the KSK program. The type of research used here is field research to obtain the necessary problem data. Data collection techniques used participant observation and documentation. The data presented is in the form of screenshots of the editing works resultss or other forms of documentation during the editing process which are then presented descriptively.The results of the study show that the role and function of the KSK program editor is as an analyst to ensure image quality is in accordance with Standard Operating Procedures (SOP) and does not violate broadcasting guidelines. In carrying out these roles and functions, the editor performs censorship by cutting the image and sound (cutting), recombining (trimming) and submitting it to the quality controller when all the editing processes have been completed. Apart from that, technically, the editor does rearrangement, sound arrangement (mixing), assigns titles, and creates fillers. The editor also uses the cut technique for cutting videos, then dissolves fadein and fadeout to soften video cuts.
Peran Produser pada Program Feature Televisi “Geliat Budaya Ngopi di Pontianak”
Authors: Maulid Faiz Iqbal , Sarifah Siti , Anggraeni Tri
Published: September 2023

Pontianak has a great business potential in the coffee sector and eventually makes it as the largest coffee exporting city in Indonesia. Then this is an interesting theme to be made into a feature format of television program. This program will especially attract more to urban people who want to know more about simple activities that affect the level of happiness in Indonesia. This scientific work discusses the role of the producer in making a feature program titled "Geliat Budaya Ngopi di Pontianak" which contains a feature format with the theme of human interest, as well as informative and entertaining feature program. The creation of this program went through pre-production, production and post-production stages. Producer plays an important role in the content of a program. Producer is required to take concern and combine the elements in planning, producing, and broadcasting a television program in order to get high quality production results. These elements include production materials, production facilities, production costs, human resource management, as well as the stages of production implementation. This feature program combines several sub-formats such as vox pop, statements, and narratives that support the information and visuals.
Implementation of Dashboard Power Bi for Data Visualization of Graduates During Covid-19 Pandemic in The Faculty of Tarbiyah and Teaching Sciences IAIN Palopo
Authors: Muassar Mifta Zulfahmi
Published: September 2023

This study presents information regarding the distribution of graduates and the number of students who graduated during the pandemic of Covid-19 at the Faculty of Tarbiyah and Teaching Sciences IAIN Palopo through visualization of data depicted during the Covid19 pandemic, namely in a vulnerable time in 2020 to early 2022. This visualization is done by distributing graduate data into the Microsoft Power BI application and depicted in the form of a diagram, after that the data is visualized in the form of diagrams and numbers based on the categories that have been collected in the form of an Excel file which is then saved in a CSV file type so that the files obtained lighter than before so that the distribution of data in the form of information for graduates of the Faculty of Tarbiyah and Teaching Sciences at IAIN Palopo can be easily observed by policymakers in making decisions.
Designing Learning Monitoring snd Evaluation Management Systems for Lecturer Performance in Informatics Study Program
Authors: Eka Yulia Sari  , Titik Rahmawati  , Dina Yulina Heriyani
Published: September 2023

The main responsibilities of a lecturer is to transform, to develop and to transfer knowledge through teaching and learning process. Assessment by students for their lecturers to provide input for lecturers and study program quality is needed so that the teaching and learning process can be controlled and in accordance with the established quality standards. In carrying out the process of monitoring and evaluating on lecturer performance, the Informatics Study Program, Faculty of Engineering, Universitas Tamansiswa is currently using Google form to distribute questionnaires. This is considered ineffective and produces invalid data. Therefore, the use of technology can be a solution to this problem. The purpose of this research is to design a management information system model for monitoring and evaluating learning that can facilitate the software development stage. The design of this learning monitoring and evaluation processing system uses the Unified Modeling Language (UML) model. While the software development method proposed by the author is Agile Software Development. The result of this research is a design model with UML in the form of use case diagrams, activity diagrams, and class diagrams, where the results of this design model can facilitate the next stage of software development. In addition, PIECES analysis is used to assist in identifying weaknesses in the current system to facilitate the mapping of system requirements. Needs mapping is used to identify the proposed new system, in which this proposed new system has 4 user levels, namely: administrator, GMP (Gugus Mutu Prodi), lecturers and students. Each user has its own authority in the proposed system.
DEVELOPMENT A WEB-BASED STUDENT INTERNSHIP APPLICATION USING LARAVEL FRAMEWORK
Authors: Nugraha Muhammad , Agus Ricak , Fathi Halimil , Baginda Rizki
Published: September 2023

In this research, the author will discuss the development of a student internship information system implemented using the Laravel framework. The aim is to provide convenience for students in registering/applying for internships, reporting daily activities, submitting final reports, and updating all other internship-related information, as well as facilitating institutions in managing internship data. The method used in this research is the information system development method, which includes literature review, needs analysis, system design, testing, and evaluation. The Laravel framework was chosen because of its good performance, ease of use, and many features that can facilitate the development of information systems. The student internship management information system designed has easy-to-use internship registration and reporting features that can be accessed from anywhere, as well as integrated internship data management features. The results of this research show that the development of a student internship information system using the Laravel framework can provide convenience in registering and reporting internship results for students, as well as help institutions in managing internship data. It is hoped that with the existence of this student internship information system, it can be a solution to simplify and accelerate the internship process and management for students and participating institutions.
Real-Time Prediction of Formation Pore Pressure Using Hybrid LSTM-BP Model
Authors: Yao Xuezhe , Song Xianzhi , Han Liang , Zhang Haolin , Zhu Zhaopeng , Li Baoyu , Zhang Rui
Published: September 2023

Accurate and real-time prediction of formation pore pressure is critical to ensure drilling safety. However, the performance of the most traditional formation pore pressure calculation methods are not satisfied in field applications due to their limited accuracy and time-effectiveness. In this paper, a novel artificial intelligence model is proposed to accurately predict formation pore pressure in real-time. First, the dataset for model training is prepared after handling the outliers and missing values of the drilling and logging data, which collected from 12 wells in Tarim Basin. And the logging data of the offset well is used to develop a logging data prediction model for the well under drilling based on the error Back Propagation Neural Network (BPNN). Then, a hybrid model is created by combining the Long Short-Term Memory Neural Network (LSTM) and the BPNN. Finally, the hybrid LSTM-BP model is trained and validated on the drilling and logging dataset, and the grid search algorithm is used to optimize the hyperparameters of the model. The hybrid LSTM-BP model is utilized to estimate formation pore pressure by inputting the drilling data of the well under drilling and longing data of the BPNN model predicted. The results indicate that the relative error of formation pore pressure prediction is less than 10%. This paper provides an accurate method to predict formation pore pressure in real-time, which is of great significance for maintaining the stability of the wellbore and ensuring the safety of drilling.

INTRODUCTION

Formation pore pressure is the pressure of the fluid in the formation, which is one of the most crucial fundamental data in the process of petroleum exploration and development, and a crucial foundation for the design of drilling plans and the analysis of wellbore stability (Azadpour et al., 2015; de Souza et al., 2021). However, when formation pore pressure is predicted incorrectly, it can lead to drilling risks including gas invasion, kick, and even blowout, which may result in enormous financial losses such as in the Deepwater Horizon tragedy. Therefore, accurate prediction of formation pore pressure in the process of drilling is conducive to ensuring drilling safety, improving rate of penetration (ROP), protecting the reservoir, and improving oil and gas recovery (Lei and Jie, 2004).
Investigation of the Mechanical Properties of Hanna Sandstone Using Newly Installed High Pressure and High Temperature Polyaxial Equipment
Authors: Dabbaghi Ehsan , Ng Kam
Published: September 2023

The design of civil infrastructure requires the assessment of the mechanical properties of rock layers supporting these structures. In this study, a newly installed high-pressure and high-temperature polyaxial equipment at the University of Wyoming is described and used in the mechanical testing. Uniaxial and triaxial compression tests are performed on dry and water-saturated cylindrical sandstone samples obtained from the Hanna Formation, Wyoming. The cylindrical samples are prepared and tested in two different sizes: 1) 25.4 mm diameter by 50.8 mm length, and 2) 76.2 mm diameter by 152.4 mm length. The sandstone samples are vacuum-saturated for 7 and 14 days. For the triaxial compression tests, the samples are subjected to three effective confining pressures of 5, 15 and 25 MPa and under two temperatures of 35 and 55 °C. The results show that the effective confining pressure has a clear positive effect on the compressive strength of all samples. Under the same effective confining pressure, larger samples show higher compressive strength and Young's modulus. For all three effective pressures, the dry samples exhibit higher compressive strengths, Young's modulus and more brittle behavior. Permeability decreases with the confining pressure. P and S wave velocities increase with the confining pressure.

INTRODUCTION

The design and performance of infrastructures can be highly affected by the strength and deformation of the rocks beneath or around them. Characteristics like rock type, sample size, porosity, water content, and temperature can change the strength and deformability of rocks. Studying the simultaneous effect of the aforementioned characteristics can improve our understanding of rock behavior, which leads to more dependable designs of civil infrastructures.

The Hanna Basin is located in southeast Wyoming, bounded by Laramide-aged uplifts (Fig. 1). The formation was formed in the Tertiary period and extends from 0 to 7000 ft below the ground level (Bowen, 1918). A conglomeratic sandstone lays at the base of the formation, with conglomerate, sandstone, shale, and coal beds alternating to the top. In a study (Oliver and Youngberg, 1984) on a unit from the Hanna formation, 72.2% of the rock footage was comprised of Calcareous sandstone. The bulk mineralogy of the Calcareous sandstone was determined as follows: 54% quartz, 9.6% kaolinite, 9% K-Feldspar, 8.4% Dolomite, 6.1% Plagioclase, 5.4% Mica, 3.9% Calcite, 3.4% Siderite, and 0.3% Acmite.
Effects of Dynamic Surge Pressure on Wellbore Stability
Authors: Liu Y. , Dokhani V. , Ma Y. , Miao H. , Zamiran S.
Published: September 2023

This study presents a coupled poroelastodynamic model for wellbore stability analysis considering the effects of tripping operation and the flow communication between wellbore and formation. First, a transient hydraulic model is developed based on transient pressure propagation in the wellbore to predict the generated surge pressures during tripping operation. The transient hydraulic model is transformed into ordinary differential equations using the method of characteristics and is finally solved through the finite difference method. Then, the results are coupled with a wellbore stability model to include the effect of wellbore pressure variation with time. The developed transient hydraulic model is validated through comparisons with available field data and modeling results in the literature. Comparing the surge pressure predictions of the model with field data indicates a consistent and accurate prediction of the transient surge pressure. The results further show that a maximum surge pressure can be expected before approaching an equilibrium surge pressure, which could not be predicted by the previous surge models due to ignorance of the acceleration terms. The total radial and tangential stresses are calculated and shown to vary versus time. The results indicate that the induced pressure initially rises to a maximum value and then decays with time, but the maximum value is not necessarily always at the wellbore wall. The results of tensile and shear failure analysis indicate time-dependent failures can occur in the vicinity of the borehole depending on the magnitude of the tripping velocity.

INTRODUCTION

Tripping is a frequent operation that is running pipes into or out of a well for different reasons, e.g., replacing a dull bit, replacing bottom hole assembly, running logging tools, running casings or liners, and wellbore conditioning. It has long been known that the tripping operation can induce surge or swab pressure if running into or out of the well, respectively. In fact, the axial movement of a drill string, like a piston, in the wellbore results in pressure perturbations. Pioneer studies such as Cannon (1934) and Goins et al. (1951) show that a high tripping velocity can cause drilling problems such as formation fracture or gas kicks. The magnitude of surge pressures typically may not exceed the safe pressure limit in most wells. However, there are critical wells such as deep wells or depleted reservoirs where the surge and swab pressures shall be maintained within a narrow pressure limit. Although a low tripping velocity can avoid borehole problems, such practice will ultimately increase the Non-Productive Time (NPT) and hence the total drilling cost. Accurate prediction of surge and swab pressures helps to find the maximum allowable tripping speed and reduce the NPT, which all optimize the drilling performance. In the first part of this study, a very brief review of fundamental studies about surge/swab modeling and associated wellbore stability concerns is presented.
Research on Hydraulic Fracture Propagation Law of Carbonate Reservoir Considering the Influence of Vugs
Authors: Zhou Jun , Yao Yiming , Zhang Baoping , Wu Zhiying , Sheng Mao
Published: September 2023

The size and shape of the vugs in the fracture-cavity carbonate reservoir are uncertain, and the heterogeneity is very strong, which has obvious influence on the effect of acid fracturing. A large-scale physical simulation test with different vug sizes, different distribution characteristics and ground stress differences was carried out to analyze the characteristics of fracture penetration and migration. At low horizontal stress difference (K ≤0.15), hydro fractures will be non-plane propagation when they encounter vugs, and the fracture morphology becomes more complex. When there is a high horizontal in-situ stress difference (K ≥0.36), the horizontal in-situ stress difference will overcome the stress concentration of the hole body and expand, and will directly pass through the vug and continue to expand. The experimental results can provide a theoretical basis and guidance for the design and construction parameter optimization of the acid fracturing scheme for fracture-cave carbonate rocks.

INTRODUCTION

The reservoirs of Ordovician Yingshan Formation and Yijianfang Formation in Tarim Basin are mainly composed of carbonate karst erosion pores, caverns and fractures, and the reservoirs are distributed in fracture-vuggy zone as the basic unit. The development scale and morphology of fracture-vuggy are highly uncertain, and the heterogeneity is extremely strong. The development of fracture-vuggy carbonate reservoir often requires acidizing fracturing. However, due to the influence of karst cave development on local stress, the extension path of artificial fractures also changes obviously.

By means of finite element method or element splitting method, the physical model and mathematical model considering the propagation of artificial fractures by kart cave were established, and the interaction mechanism between artificial fractures and solution under different conditions was analyzed(Pan et al., 2012, Li et al., 2009, Wang, 2017, Du, 2015). Some researchers have explored the communication between artificial fracture morphology and holes by prefabricating large size holes in large object molds (Li et al., 2020, Zhou, 2016, Liu et al., 2019, Guo et al., 2020).However, there are some differences in the understanding of different scholars. Some believe that artificial fracturess will expand in the direction of the karst cave and eventually communicate with the karst cave, and some believe that the interference of the stress concentration of the karst cave will offset the karst cave during the expansion of artificial fractures (Weng et al., 2015, Luo et al., 2020, Wang et al., 2020). Therefore, in order to clarify the propagation law of artificial fractures in fracture-cavity carbonate reservoirs, the true triaxial compression fracture propagation experiment of carbonate rocks considering the effect of pores is carried out, and the influence law of pore size, horizontal stress difference and pore location on fracture propagation is explored.
Fracture Initiation and Propagation Around Calcite Nodule Interfaces
Authors: Dudley J. W. , van Haasterecht M. J. T. , van der Linden A. J. , van Schalm R. , Coorn A. H.
Published: September 2023

Drilling through and production from calcite nodular formations (NF) is a complex issue in some places, where both significant lost circulation problems are encountered during drilling (costing millions of $US), and enhanced production has been seen following hydraulic fracture stimulation, so a better understanding of how these formations fracture and fail is needed to optimize drilling and production in these NF. This paper presents a workflow developed to evaluate fracture initiation and propagation in these NF. It includes specialized triaxial compression testing including acoustic emission (AE) monitoring, and detailed pre- and post-test micro-CT imaging of the samples. It has been used to characterize the strength of interface samples from two NF. The micro-CT imaging of the samples and measured strength clearly show the porous material strength determines the failure strength along the interface. The AE monitoring of interface samples showed that fracturing begins in the porous sandstone near the interface and continues along the interface in the porous material, only entering (if at all) the calcite-cemented material just before macroscopic failure at the final stress drop. The results can be useful for modelling fracture initiation and failure in these NF, and thus contribute to a more optimized drilling and production plan for the NF.

INTRODUCTION

Drilling through and production from formations with significant nodular calcite deposits has been a complex issue in certain basins, where the Nodular Formations (NF) are a significant source of lost circulation (LC) problems during drilling, leading to significant trouble costs (millions of $US) and delays. On the other hand, enhanced production has also been seen from these NF following hydraulic fracture stimulation compared to regions without the nodular deposits, so a better understanding of how these formations fracture and fail is needed to optimize drilling and production in these NF.

This paper documents development of an experimental workflow to quantify the fracture and failure properties of calcite nodular formations. The work was initiated to help improve the understanding and modelling of fracturing in these formations. The calcite nodules described here are within various porous sandstone formations. The nodules themselves are layers within the formation that have regions where the pore space is filled with calcite cement. An example of this type of formation is the Tres Pasos sandstone formation in Chile, shown in Fig. 1. While fracturing in conglomerates and concrete has been studied (e.g., Bazant, 1985, and its references), this nodular formation is different in that the ‘inclusions’ are just calcite-filled pore space regions within the continuous sand matrix, and not a gravel, aggregate, or cobblestone surrounded by a finer grain or cement matrix.
Numerical Modeling of the Bridging Process of Swelling Diverter Particles in a Hydraulic Fracture
Authors: Luo Bo , Han Yanhui
Published: September 2023

Horizontal drilling and multi-stage/multi-cluster hydraulic fracturing are critical technologies that enable the economic production of hydrocarbons from unconventional reservoirs. However, achieving uniform growth from multiple perforated clusters remains a challenge. In hydraulic fracturing operations, some fractures can be overgrown while others are fully suppressed. Near-wellbore diversion is commonly used to promote uniform growth of each cluster in a stage. In this study, a continuum approach of particle transport was implemented and coupled with a fluid flow solver in FLAC to simulate the nonlinear particle propagation and bridging in the near-wellbore diversion process. The effect of swelling behavior of diverters on the bridging location and time inside a fracture, as well as pressure buildup at the fracture entrance, was evaluated. Simulation results showed that the use of swelling particles resulted in the formation of a closed bridging loop with fewer particles and a shorter injection time, and higher fluid pressure at the fracture entrance.

INTRODUCTION

Horizontal drilling and multi-stage/multi-cluster fracturing have become standard practices for the completion of unconventional reservoirs (Economides and Nolte, 2000). However, due to the heterogeneity of the formations, local stress concentration from geological structures, and stress interference from nearby fractures, uneven growth of multiple fractures is commonly observed in the field (Cipolla et al., 2011; Miller et al., 2011). To promote uniform growth, hydraulic fracturing operations often use diverting particles that temporarily block off the over-grown fractures, allowing more injected fluid to be diverted to under-stimulated fractures (Barraza et al., 2017; Daneshy, 2019; Shahri et al., 2016).

Numerical modeling is a valuable tool for understanding, predicting, and designing hydraulic diversion operations. The numerical schemes to model particle transport can be classified into two groups: discrete and continuum approaches. While the discrete approach (Mao et al., 2021; Mondal et al., 2016; Suri et al., 2020; Zeng et al., 2019) has demonstrated accuracy in capturing fluid-particle interactions at the pore-scale and applications in investigating problems related to fluid flow through proppant packs and sand erosion inside fractures and perforations (Fan et al., 2019, 2018; Han and Cundall, 2013, 2011), it suffers from a major drawback of high computational cost.