bluuebunny/crossref_metadata_2025 huggingface dataset:
Implications of the COVID-19 Pandemic on China's Power Consumption: A comprehensive Analysis Derived from Monthly Electricity Consumption Forecasts
Authors: Wu Fengting
Published: September 2023

The COVID-19 pandemic profoundly altered the total and pattern of electricity consumption across Chinese industries and households. However, current research has not fully and accurately measured the impact of the pandemic. This paper builds a novel discrete gray seasonal model (referred to as the FDDGSM model) to predict the scenario of different domestic electricity-consuming sectors and residential electricity consumption without a pandemic backdrop, by comparing it with the actual electricity consumption in 2020, the impact of the COVID-19 pandemic on China's electricity consumption is better revealed. Through empirical analysis, the following conclusions are reached in this study: (1) The novel discrete grey season model shows more stable and accurate characteristics in forecasting time series with seasonal trends. (2) The pandemic did not significantly impact electricity consumption in primary industries and households, while actual usage in secondary and tertiary industries was significantly lower than expected in a non-pandemic scenario. (3) The impact on secondary and tertiary industries varied in magnitude and duration, and they differed in the rate of recovery in electricity consumption.
Research on Copyright Protection of Works Generated by ChatGPT
Authors: Guan Aijing
Published: September 2023

There has been a debate about whether ChatGPT should have copyright. On the one hand, some people believe that AI creations meet the protection requirements of the Copyright Law, and their creative ability and creativity are comparable to those of human creators; On the other hand, there are also those who disagree, arguing that artificial intelligence, as a machine, lacks the qualities of perception and emotion, cannot be treated on an equal footing with human creators, and therefore should not enjoy copyright. In addition, the global legislative status and controversy regarding the copyright ownership of artificial intelligence is also an issue worthy of concern. This article will explore the essential difference between human authors' works and ChatGPT creations, so as to determine whether ChatGPT and other artificial intelligence should enjoy copyright at the legal level. The protection of artificial intelligence copyright is conducive to the more effective and convenient development of the creative field of this era, and artificial intelligence creations can also expand human creative capabilities to a certain extent, human authors do not need to reject artificial intelligence too much, artificial intelligence as a tool, but will create greater commercial value.
Per l'etimologia e la storia dei bagaudi
Authors: Nuti Andrea
Published: September 2023

The most widespread etymology of bagaudae, the name of rebel groups in late Roman Gaul, connects it to Old Irish bág ‘fight’ and to the IE root *bhē/ōgh- (IEW 115). There are, however, phonetic problems. The historical sources and the current historiographic research do not support an original meaning such as ‘fighters’. A morphological and semantic analysis (doubts about a suffix *-aud-, the connotations associated with the term bagaudae, its use in anthroponymy etc.) points to an old dithematic compound meaning ‘collector of goods (to be allotted)’ (cf. IEW 107 *bhag-; 75 *au(dh)-).
El rescate de lo cultural en las Olimpiadas
Authors: Villa Mansur Erika , González Ibarra Juan de Dios
Published: September 2023

En el presente libro, El rescate de lo cultural en las Olimpiadas, se expone la inquietud como investigadores y la pasión por una trayectoria artística y cultural en los Juegos Olímpicos de la Era Moderna, sobre sus principios y antecedentes en ámbitos de complejidad, imagen y comunicación visual, pero, sobre todo, en la esencia de los principios olímpicos sobre la unión entre los pueblos, como el de mente y cuerpo unidos para un crecimiento integral del ser humano, así como el rescate artístico en la historia de las olimpiadas. Se añaden otros interesantes y anecdóticos descubrimientos obtenidos a través de las investigaciones realizadas, desde temas derivados que dan pauta a nuevas investigaciones, hasta el diseño de la identidad gráfica para los XIX Juegos Olímpicos de México 68.
Constructing Arab Western Identities Through Metamorphosis in Leila Aboulela’s Bird Summons
Authors: Awajan Nasaybah W.
Published: September 2023

The current study explores the way Leila Aboulela uses metamorphosis in her novel Bird Summons (2019). The study also shows how Aboulela’s three main characters construct their identities as Arab living in the West through metamorphosis, where they reach to what Homi Bhabha calls “The Third Space”. That is, they are transformed into different shapes and creatures due to the problems they are exposed to in the West as Arabs. The remain as such until they reach a stage where they overcome their issues and adopt their new identities as Arab Westerners. The novel is approached through postcolonial views, and especially Edward Said’s views on Orientalism and how the West sees the Orient. It is also explored through Homi Bhabha’s views on “the Third Space”. There are few studies that are conducted on the current novel. Most of the studies conducted are done on the quest of the three characters and not on how they transformed through metamorphosis.
Manajemen Keterlibatan Orang Tua di KB TK Satria Tunas Bangsa Jln. Hasanudin No.3b, Mangunsari, Kec. Sidomukti, Kota Salatiga, Jawa Tengah
Authors: Gogahu Feby Krisnawati , Wijayaningsih Elisabeth Lanny
Published: September 2023

Penelitian ini bertujuan untuk mengetahui faktor-faktor yang menjadi kendala kurangnya keterlibatan orang tua dalam pendidikan anak di sekolah dan Upaya yang telah di lakukan sekolah dalam memfasilitasi keterlibatan orang tua dalam pendidikan anak di KB TK Satria Tunas Bangsa  jln. Hasanudin no.3b, mangunsari, kec. Sidomukti, Salatiga. Penelitian ini menggunakan pendekatan kualitatif deskriptif. Metode pengambilan data dalam penelitian ini yaitu menggunakan Observasi, wawancara dan dokumentasi dengan analisis data deskriptif. Teknik analisis data terdiri dari reduksi data, sajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa (1) Faktor yang menjadi kendala kurangnya keterlibatan orang tua dalam pendidikan anak di sekolah KB TK Satria Tunas Bangsa yaitu faktor status sosial yaitu pekerjaan orang tua, faktor  dari orang tua itu sendiri yaitu pengetahuan orang tua tentang pentingnya keterlibatan orang tua dalam pendidikan anak disekolah masih kurang, faktor model peran orang tua yaitu peran keterlibatan dan tanggung jawab orang tua di sekolah selalu di wakilkan satu pihak saja, faktor anak. (2) upaya yang  dilakukan pihak sekolah dalam memfasilitasi keterlibatan orang tua dalam pendidikan anak di sekolah yang tertuang dalam Manajemen Keterlibatan Orang Tua melalui beberapa program kegiatan sekolah yaitu partisipasi pada program kegiatan sekolah, pengambilan keputusan, pembelajaran di rumah dan kegiatan sukarelawan.
Supplementation of Sulfate Polysaccharides in the Seminal Cooling Medium of Common Curimatã (Prochilodus Brevis)
Authors: Sales Yara Silvino , SalesLobato Jéssica , Vieira Carla Tatiana Nascimento Sousa , Filho João Eudes Faria Cavalcante , Ferreira Yasmim Maia , Apoliano Marcos Luiz da Silva , Nascimento Renata Vieira do , Sobrinho Silvio Alencar Căndido , Rodrigues José Ariévilo Gurgel , Guia Carla Pamela Braga , Magalhães Fernanda Vitória Almeida , Salmito-Vanderley Carminda Sandra Brito
Published: September 2023

Background The use of sulfated polysaccharides (PS) in seminal cooling is known to improve seminal quality. OBJECTIVE: To evaluate the effect of different concentrations of PS, extracted macroalgae Gracilaria domigensis as a supplement to the seminal cooling medium
of the reophilic fish Prochilodus brevis (common curimatã). MATERIALS AND METHODS: Five semen pools were diluted in ACP-104 (treatment T1), in BTS®(T2) and in BTS®with different concentrations of PS (0.5 [T3]; 1.0 [T4] and 1.5 [T5]). The samples were cooled for
different times (0, 6, 24, 48, 72, 96 and 120 h) and after each hour they were analyzed for: morphology, membrane integrity, DNA integrity and sperm kinetics. RESULTS: There were no significant differences between the treatments containing different concentrations of sulfated polysaccharides.
Regarding the different cooling times, it was possible to observe that after hour 96, there was a reduction in the parameters of sperm kinetics. For DNA integrity there was no significant difference in relation to the treatments nor in relation to the hours. For membrane integrity, a reduction
was noted as of hour 96, but there was no influence of polysaccharides. For the sperm morphology, there was no statistical difference between the hours, however the BTS was better than the ACP-104. CONCLUSION: It is concluded that the use of polysaccharides in seminal cooling has no
negative effect on sperm parameters and proves that seminal cooling keeps the material viable for up to 72 hours.
Génesis, lógica y aporías del concepto moderno de representación política
Authors: Buitrón Portilla Eduardo
Published: September 2023

Este artículo analiza la génesis, lógica y aporías del concepto moderno de representación política, centrándose en el Leviatán de Thomas Hobbes como punto central en la configuración de este concepto. En base al enfoque de la historia conceptual de Reinhart Koselleck y la filosofía política de Giuseppe Duso y la Escuela de Padua, se examina la génesis del concepto en el contexto del surgimiento de la ciencia política moderna, destacando la importancia que tiene la obra de Hobbes. El análisis también abarca la lógica de la representación política, que se entrelaza con la delegación del poder y el contrato social, y se explora las aporías que surgen del desfase originario entre el orden conceptual y el orden político, así como las tensiones entre la representación y la participación ciudadana en la democracia moderna.
Desinformación y democracia subnacional en Twitter
Authors: Pino Uribe Juan Federico , Gómez Liliana María , Melo Juan David Melo , Carvajal Pardo Alejandro
Published: September 2023

La desinformación es un fenómeno global en crecimiento que ha surgido del desarrollo y consolidación de grandes plataformas digitales como Twitter y Facebook. Los mensajes producidos en plataformas digitales para persuadir y convencer a los votantes se están convirtiendo en un aspecto central del análisis de las campañas electorales e incluso del trabajo gubernamental a nivel nacional y subnacional. Sin embargo, el papel de este recurso cada vez más utilizado en campañas políticas en plataformas digitales, especialmente Twitter, no ha recibido la misma atención en la esfera electoral subnacional. En este contexto, este artículo gira en torno a la siguiente pregunta: ¿Qué tipos de desinformación fueron promovidos por los oponentes de Claudia López en Twitter durante la campaña para las elecciones a la alcaldía de Bogotá en 2019? El estudio de caso utilizado para responder a esta pregunta de investigación son las elecciones de 2019 para elegir al alcalde de Bogotá, Colombia en las que compitieron Claudia López, Carlos Fernando Galán, Miguel Uribe y Hollman Morris. Este concurso electoral subnacional se caracterizó por el uso significativo de Twitter tanto por parte de los candidatos como de los partidarios y oponentes. La metodología utilizada en este artículo fue mixta, combinando métodos cualitativos y cuantitativos. Se utilizó el Análisis de Contenido, que es uno de los métodos más utilizados para estudiar el contenido manifestado en los medios. Este artículo demuestra la creciente importancia del estudio de las campañas políticas a través de las redes sociales a nivel subnacional y el uso de la desinformación para atacar a adversarios políticos. Muestra los tipos de desinformación promovidos por los oponentes de Claudia López en Twitter durante su campaña para alcalde de Bogotá en 2019, siendo Sátira, Conexión Falsa y Contenido Engañoso los más comunes.
dos almas de la democracia.
Authors: Cordero García Grecia
Published: September 2023

El debate actual en torno a la crisis de representación expresado en un llamado a nuevas formas de democracia directa o participativa tiene su origen, a diferencia de lo que pudiera pensarse, no sólo en las transformaciones económicas, políticas y sociales contemporáneas, sino en la estructura aporética misma de la democracia moderna. A partir de Rousseau, Schmitt, Kelsen, Heller, Manin y Pitkin, entre otros autores, este trabajo tiene como objetivo hacer una revisión teórico-filosófica del concepto de representación política; sus perennes debates, contradicciones y necesarios goznes dentro del gobierno representativo democrático. Particularmente, se abordará la bifurcación entre los principios de identidad y representación, así como su enlace en tanto constitución mixta de los tiempos modernos.
Explaining the length of party manifestos in gubernatorial elections in Ecuador
Authors: Dandoy Régis
Published: September 2023

Party manifestos have been widely analysed in political science, with a particular focus on their content rather than on their format. This article focuses on one specific aspect of the format of party manifestos as it attempts to understand the variation of their length by digging into the Ecuadorian case. Using empirical data on the content of party manifestos drafted by candidates for the gubernatorial elections (2009-2023), this article concludes that time and party size matters when one wants to understand the production of party manifestos. Party manifestos drafted in more recent years tend to be longer while large political parties tend to produce longer manifestos. In a context where the electoral management bodies take into account party manifestos for the registration of candidates worldwide, the identification of the determinants their length proved to be increasingly relevant.
Data Privacy and Security in Big Data: A Comparative Analysis
Authors: DANGAL SANTOSH
Published: September 2023

The rapid proliferation of big data and data- driven decision-making has brought about unprecedented technological advancements, revolutionizing various industries. Organizations now harness extensive data to extract valuable insights, optimize operations, and enhance customer experiences. However, this data-driven landscape raises concerns about individual privacy and data security. As personal information collection and analysis become more prevalent, robust privacy approaches are imperative. This research paper conducts a comparative analysis of privacy approaches in the context of big data and data-driven decision-making. It examines traditional methods such as cryptography, anonymization, and access controls, alongside emerging techniques like differential privacy, homomorphic encryption, and secure multi-party computation. Qualitative content analysis and thematic coding gather insights from academic literature, reports, and expert interviews. The findings highlight each approach's strengths, limitations, and trade-offs, offering valuable insights for organizations aiming to balance data utility with privacy preservation. This study contributes to understanding ethical concerns, legal compliance, data quality, trust, and technological advancements in the pursuit of responsible data-driven decision-making while safeguarding privacy. Key Words: privacy preservation, big data analytics, data privacy strategies, ethical data use, emerging privacy techniques
Perancangan Sistem Pendeteksi dan Monitoring Ketinggian Air Berbasis IoT Menggunakan NodeMCU ESP8266
Authors: Darso Darso , Muhammad Habib Al Hudry  , Firman Fathoni  , Yuntafa Ulkhaq  , Pras Tio Rifki Wijaya  , Muhammad Arkan H
Published: September 2023

Perkembangan dunia digitalisasi semakin berkembang. Teknik pengukuran umumnya menggunakan peralatan dengan pengukuran manual seperti mengukur perangkat yang ingin diketahui panjang dan ketinggian suatu objek. Namun, era saat ini dunia digitalisasi mampu melakukan pengukuran tanpa menyentuh perangkat yang akan diukur. Salah satunya dengan memanfaatkan sumber gelombang suara atau biasa disebut sebagai gelombang ultrasonik. Tujuan dari penelitian ini adalah untuk membuat perancangan sistem untuk mengukur ketinggian air secara digital berbasis mikrokontroler.

Perancangan sistem ini menggunakan sensor Ultrasonic HCSR04, mikrokontroler ESP8266 serta Platform Internet of Things (Blynk). Hasil pengukuran ditampilkan dalam perangkat komputer untuk memudahkan pembacaan. Perancangan ini dikendalikan melalui NodeMCU ESP8266 Lolin v3 dan Platform Internet of Things (Blynk). Hasil pengujian prototype alat dapat berjalan dengan baik dan bisa diakses secara real time. Pengukuran alat ini dapat membaca jarak air dengan baik dari posisi alat yaitu jarak aman ≥ 8 cm, waspada 5-7 cm, bahaya 0-4 cm.
KOMPARASI PAYMENT DIGITAL UNTUK ANALISIS SENTIMEN BERDASARKAN ULASAN DI GOOGLE PLAYSTORE MENGGUNAKAN METODE SUPPORT VECTOR MACHINE
Authors: Renal Renaldi AL Anshari , Syariful Alam  , Moch Hafid T
Published: September 2023

Pada era modern saat ini semuanya menjadi sangat mudah dan praktis tentunya dengan bantuan perkembangan teknologi aktivitas manusia menjadi sangat terbantu sekali. salah satunya dalam bidang keuangan atau biasa disebut finance. seperti yang sudah di ketahui saat ini banyak produk keuangan yang di gabungkan dengan kemampuan teknologi atau sering juga di sebut dengan fintech (finansial technology). salah satu produk dari fintech adalah payment digital. Sederhananya digital payment ini merupakan metode pembayaran yang memanfaatkan teknologi jaringan internet dan sejumlah perangkat untuk mendapatkan benefit kepraktisan, efesiensi dan kemudahan. Salah satu aplikasi digital payment yang digunakan dalam penelitian ini adalah Dana dan Ovo, data yang diambil ini adalah data ulasan pengguna dari google playstore dengan cara scraping menggunakan API google play scraper. Tujuan dari penelitian ini utnuk mengetahui ulasan pengguna dan membandingkan mana aplikasi yang mendapatkan banyak komentar positif dan negatif menggunakan algoritma Support Vector Machine, dari masing-masing aplikasi diambil  6000 data, dan untuk hasil akhirnya aplikasi dana yang mendapat nilai tertinggi berdasarkan nilai akurasi 0,92, presisi 0,92 dan nilai recall 100%. Dengan hal itu aplikasi dana cenderung mendapatkan sentiment positif dan negatif lebih banyak di masyarakat berdasarkan ulasan pengguna
El enfoque STEAM para la mejora de conocimientos y motivación desde un aprendizaje interdisciplinario en estudiantes de primaria
Authors: Michuy Gaibor Moisés Florentino , Molina Verdugo Andrea Lizbeth , Peña Patricia Moraima , Vistin Vistin Jair Manuel
Published: September 2023

Introducción: el STEAM término que hace referencia a Ciencia, Tecnología, Ingeniería, Artes y Matemáticas, que nace en 2008, con la idea de convertir el proceso de enseñanza y aprendizaje en un proceso integrado y creativo que provoque una disrupción de la educación, este se lo puede combinar con metodologías basados en proyectos.

Objetivo: El objetivo del presente estudio es analizar el impacto del enfoque STEAM y el aprendizaje basado en proyectos en la mejora de conocimientos y la motivación de los estudiantes.

Métodos: La investigación es cuasi experimental, de enfoque cuantitativo, como técnica de recolección de datos se utilizó el cuestionario de evaluación de motivación académica para estudiantes desarrollada por El Ministerio de Educación y Formación Profesional a un grupo de 24 estudiantes de 24 estudiantes del sexto año de EGB de la Unidad Educativa Alejandro Sergio Bermeo.

Resultados: El enfoque STEAM y ABP, logran la mejora de los conocimientos en las asignaturas de Matemáticas, Ciencias Naturales, Educación Cultural y Artística y Tecnología, así mismo que la motivación de los estudiantes luego de la aplicación de la investigación mejoró de forma significativa, siendo en los hombres mucho mayor que en las mujeres.
Socio-Environmental Impacts of Certifica Minas Café Program on Coffee Plantations in Southern Minas Gerais
Authors: Castro Claudio V. , Lira Jean M. S. , Salgado Eduardo G. , Beijo Luiz A.
Published: September 2023

The Certifica Minas Café (Minas Coffee Certification) is the only public program in Brazil for coffee plantation certification. Therefore, this study aimed to evaluate the environmental and social impacts, as well as the best production practices on the properties that adopted the Certifica Minas Café certification program. The research sampled 46 certified properties, which were evaluated in the years 2013 and 2015, based on the same criteria used in the official audits of the program. The results demonstrate that certified properties tend to show significant improvements in the criteria for property management and capacity building of rural workers. On the other hand, certification adoption did not show significant changes in traceability and environmental responsibility despite the reduction of agrochemical pollution found on certified farms. The research also pointed out the challenges faced by program managers. However, we affirm that the Minas Gerais certification program is helpful, but adjustments are necessary to meet the objectives of sustainable coffee production.
Algunas características de los estudiantes de la Escuela Tecnológica Instituto Técnico Central
Authors: Bonilla Norato Eduardo Antonio , Herrera Romero Martha Cecilia
Published: September 2023

Este artículo presenta algunas de las características de los estudiantes de los Programas de Educación Superior en el primer periodo académico de 2007, información obtenida con la aplicación de una encuesta poblacional a 314 estudiantes escogidos por Muestreo Aleatorio Simple, investigando variables relacionadas con aspectos personales y familiares, laborales, académicos y de apoyo institucional. Se presentan las prevalecías por cada variable y comentarios relacionados con: localidad donde viven, estrato económico, género, edad, estado civil, número de hijos, ocupación, ingresos económicos, condiciones académicas y factores que inciden en el desempeño académico.
Análisis de estrellas y polígonos
Authors: Cortés Silva Hernán Darío
Published: September 2023

Se presenta en este artículo la descripción de un proceso de análisis, ejecución y control valorativo que se siguió para encontrar respuestas a un desafío de orden geométrico que derivó en el planteamiento de un problema y la solución que ﬁnalmente se construyó. Se pretende destacar el valor y la importancia que tiene el asumir una actitud investigativa ante situaciones que son intelectualmente atractivas y desaﬁantes, aunque los resultados no tengan una utilidad inmediata e incluso aunque no sean plenamente exitosos.
Application of wide-spectrum light-emitting diodes in the indoor production of cucumber and tomato seedlings
Authors: Tymoszuk Alicja , Kulus Dariusz , Błażejewska Angelika , Nadolna Katarzyna , Kulpińska Alicja , Pietrzykowski Krzysztof
Published: September 2023

Horticulture is now revolutionized by advancements in light-emitting diode (LED) lighting. New technologies enable knowledge expansion on how plants require different spectral illumination for optimal growth and development. The aim of this study was to evaluate the quality of cucumber (Cucumis sativus L. ‘Parys F1’) and tomato (Solanum lycopersicum L. ‘Poranek’) seedlings produced in indoor controlled conditions, using three different types of LED tubes emitting warm light (AP67, AP673L, and G2). The photosynthetic photon flux density was set at 50–65 µmol m−2 s−1 and a 16-hour light regime was used. The results were compared to the cool daylight-emitting fluorescent (FL) control (tube lamp TLD 36W/54). A detailed analysis of the biometrical parameters of the aboveground and underground parts of seedlings was performed. Moreover, the content of chlorophyll in the leaves was measured. No effect of light spectra on the underground part of cucumber was found. On the other hand, the type of lamp affected the number of leaves and chlorophyll content in this species. Lamps AP673L and FL can be recommended in the production of cucumber seedlings. The obtained seedling had characteristics desired for horticultural production, i.e., compact habit with a fair number of leaves and chlorophyll content. As for tomato, the FL lamp had the best effect on the development of seedlings. Due to the high share of far red light, the tested LEDs stimulated the elongated growth of flaccid plants, unsuitable for commercial producers. Our findings not only described the effect of various light spectra on plant development but can also be useful for producers of popular vegetable crops.
Silver nanoparticles production mediated by natural tetraploid Trifolium pratense L.: Characterization and potential biological activity
Authors: Atar Karahan Havva , Çölgeçen Hatice
Published: September 2023

This study was aimed to present the green synthesis of silver nanoparticles through natural tetraploid Trifolium pratense L. containing high amounts of phenolic compounds and glycosidic bioactive macromolecules. Combinatorial optimization of AgNPs was achieved thanks to the stabilizing and reducing properties of the natural tetraploid T. pratense L. flowering herb extract. The biologically synthesized AgNPs were visualized by color change in UV–Vis spectroscopy. UV–Vis spectroscopy proved to be a fast and simple method to determine the synthesis of AgNPs. In addition, TEM, XRD, and FTIR analyses were performed to confirm and characterize the formation of crystalline silver nanoparticles. It was shown by the TEM analysis that AgNPs changed their size and shape when biosynthesized in different conditions. It was determined that smaller AgNPs were spherical and larger AgNPs had a truncated octahedron shape. The XRD analysis proved the presence of Ag0 in nanoparticles and showed its crystal structure and faced cubic shapes for AgNPs. Interactions between the plant bioactive compounds and the AgNPs were distinctly visible in the FTIR spectra. The biosynthesized AgNPs showed strong antioxidant activity against DPPH and ABTS; furthermore, the total phenol content was also high.
Easy, fast, cheap, informative, and pretty – staining of plant sections with Mayer’s mucicarmine and Lugol’s reagent
Authors: Łotocka Barbara
Published: September 2023

A novel combination of widely used commercial histochemical reagents, Mayer’s mucicarmine and Lugol’s reagent, was applied to survey anatomical analysis of various plant organs: Euphorbia splendens stem, Hibiscus rosa-sinensis petiole, Homalocladium platycladum stem base, Phalaenopsis sp. aerial root, Rhipsalis sp. stem, Schoenoplectus lacustris stem base, and Urtica dioica stem primary structure. The staining resulted in red coloration of non-lignified cell walls and mucilage, yellow coloration of lignified cell walls and protein-rich components of the protoplasts, and dark staining of starch. The method was found to be cheap, easy, fast, and informative, and thus widely applicable in both teaching and research.
Índice de la revista de la Academia Nacional de Medicina de Colombia
Authors: Rojas Nelson A.
Published: September 2023

La revista MEDICINA, desde sus inicios en 1873 hasta nuestros días, permite el acceso a su contenido en texto completo, por ello se percibió la necesidad de elaborar un índice con el contenido total de sus números, para permitir a sus usuarios contar con una herramienta tanto virtual como impresa de lo publicado en esta. Para su versión online podrá acceder a través del siguiente enlace: https://indice.revistamedicina.net/
Academic stress and social network addiction in Peruvian university students
Authors: Miñan Olivos Guillermo Segundo , Flores Capcha Jenny Caroly , Piñas Illanes Andrea Rosario , Suria Huincho Yesica Sonia , Toledo Figueroa Wendy Karina , Garcia Zarzosa Jhon Anderson , Mejia Huerta Gian Carlos
Published: September 2023

Introduction: academic stress and addiction to social networks are current issues that affect many university students in Peru given the technological advancement and competitiveness of modern education.
Objective: to analyze the relationship between social network addiction and academic stress in Peruvian university students.
Methods: quantitative, correlational, cross-sectional, non-experimental study. Validated and reliable questionnaires were applied to 168 university students who formed a sample with a margin of error of 5 % and a confidence level of 95 %. 
Results: academic stress was at a medium level while addiction to social networks was at a medium-high level. The most relevant inferential results showed that academic stress had a moderate negative relationship with the dimensions of social network addiction: Obsession (Spearman’s Rho = -0,434, p< 0,001), Lack of control (Spearman’s Rho = -0,462, p< 0,001) and Excessive use (Spearman’s Rho = -0,501, p< 0,001).
Conclusions: it was possible to determine a moderate negative relationship between academic stress and addiction to social networks (Spearman Rho = -0,482, p < 0,001), that is, it could be concluded that university students who experience higher levels of academic stress tend to use social networks less addictively
Asesorías de reforzamiento como estrategia para disminuir los índices de reprobación en cálculo diferencial e integral
Authors: Loria Arjona Diana Aracelly , Yam Puc Mirna Yamili , Santos Tejero Jesús Antonio , Santos Tejero Jesús Antonio
Published: September 2023

En las asignaturas de cálculo diferencial e integral que cursan los alumnos de ingeniería se tienen altos índices de reprobación lo que ocasiona que se retrasen en su programa educativo que cursan o en la deserción, es por ello que las asesorías de reforzamiento se consideran una estrategia para disminuir los índices de reprobación de una forma que sea en un horario de común acuerdo con el asesor de reforzamiento y el o los alumnos que estén interesados, así como el tema a tratar, esta investigación se llevó a cabo en el Tecnológico Nacional de México, campus Valladolid con los alumnos que cursan las ingenierías que se imparten: administración, civil, sistemas computacionales, industrial, ambiental y gestión empresarial en los periodos 2022-B y 2023-A, de los cuales en el primer periodo acudieron 59 alumnos y en el segundo 55. De los 59 alumnos que recibieron asesoría en el semestre 2022-B de cálculo diferencial el 93% aprobó la asignatura y en el segundo periodo 2023-A donde cursaron cálculo integral 55 recibieron asesoría y el 80% aprobó la asignatura por lo que de acuerdo a resultados anteriores se considera que acudir a asesorías de reforzamiento permite disminuir los índices de reprobación en los alumnos.
Research-Supported Framework for Developing Paraprofessional In-Service Trainings in O&M
Authors: Casias Nicholas Brian
Published: September 2023

This study examined in detail the roles and responsibilities of paraprofessionals who work with students with visual impairments in public schools as recommended by experts/practitioners (within the itinerant orientation and mobility [O&M] service delivery model) to influence and develop in-service training and supervision methods.
From Participant to Facilitator: A Caregiver's Experience Leading in a Virtual Intervention
Authors: Lieberman Lauren J. , Hazzan Afeez , Beach Pamela
Published: September 2023

Caregivers of older adults who have a visual impairment spend thrice as much time supporting their loved ones. The purpose of this study was to examine the unique experiences of one caregiver who began a 10-week virtual intervention as a participant and progressed to leading activities during the workshops. The participant in this case study was a caregiver of a loved one with a visual impairment. Results were obtained by triangulation of the data including one interview, a weekly journal, and workshop observations by the three researchers who facilitated the intervention. The following three themes were derived: (1) quality of life, (2) purpose, and (3) empowerment. Results revealed that the engagement of a caregiver in the cofacilitation of an intervention could have a positive impact on the caregiver and their loved one.
PENDAMPINGAN TUKANG RELIEF BANGUNAN DI DESA UTEUNKOT KOTA LHOKSEUMAWE
Authors: Hafli Teuku Mudi , Fasdarsyah F , Sarana David
Published: September 2023

Uteunkot is one of the villages in Lhokseumawe City which is one of the fostered villages of Malikussaleh University. As time went on, the increase in population had an effect on changes in land use in Uteukot Village, at first a lot of land was dormant and not used, but with the increasing number of requests for residential houses and boarding houses, there were an increasing number of residential buildings in Uteunkot Village. With the addition of boarding houses or dwellings in the village of Uteunkot, the builders, especially relief workers, were not matched to beautify the appearance of the dwellings or boarding houses in the village. Relief is a sculptural art that is usually done on wood or stone media. Relieving is a job in the construction field that is the most difficult, because it requires perseverance, patience, accuracy and skill. Therefore, a training in the process of making reliefs is needed for builders in the village of Uteunkot. The method used in this activity is to conduct counseling in the form of providing theoretical views regarding positive impacts in the field of relief and relief structures of buildings. After conducting counseling, the training will be continued by installing good and correct reliefs.
Studi Awal Pemodelan Aerodinamika Sayap Pesawat Tanpa Awak Kecepatan Rendah
Authors: Mulyadi Mulyadi , Siagian Tony
Published: September 2023

Penelitian ini merupakan studi awal proses perancangan Pesawat Tanpa Awak. Studi awal ini dilakukan untuk melihat pengaruh bentuk sayap terhadap tekanan yang terjadi pada permukaan sayap PTA dan analisis model aliran udara yang terjadi pada permukaan sayap PTA dan sekitarnya yang sangat diperlukan untuk proses perancangan selanjutnya. Studi ini menggunakan pemodelan metode elemen hingga berbantu komputer. Komputasi dinamika fluida memanfatkan Perangkat lunak Freecad 0.21 melalui workbenches yang tersedia didalamnya yaitu OpenFOAM® Computational Fluid Dynamics. Bentuk sayap yang dimodelkan terdiri dari sayap lurus, sayap tapered dan sayap tapered-lengkung dengan panjang 1000 mm dan profil  NACA 6412. Panjang mean chord adalah 100 mm untuk sayap lurus dan 80-120 mm untuk sayap tapered. Kecepatan pesawat tanpa awak  dalam pemodelan ini yaitu 20 m/s dengan sudut serang 2 derajat. Hasil pemodelan diproses lebih lanjut menggunakan perangkat lunak Paraview 5.5.2. Hasil menunjukkan bahwa tekanan permukaan maksimum terjadi pada leading edge sayap pesawat  yaitu sebesar 190 Pascal pada sayap lurus dan 210 Pascal pada sayap tapered-lengkung. Distribusi aliran udara pada profil sayap menunjukkan aliran laminar tanpa ada aliran pusar setelah meninggalkan sayap. Distribusi tekanan udara pada profil menunjukkan terjadi perbedaan tekanan antara bagian bawah dan bagian atas sayap yang menghasilkan gaya angkat pada sayap  sebagaimana yang diinginkan.
Geomechanical-Integro-Differential Solution for Biot's Effective Stress-Sensitive Permeability Monitoring During the Well-Reservoir Drawdown
Authors: Fernandes F. B. , Braga A. M. B. , Souza A. L. S. , Soares A. C.
Published: September 2023

Incorporating geomechanics to flow models become the mathematical formulation regarding well-test and reservoir engineering more realistic because geomechanical parameters, e.g., in situ and overburden stress, as well as Biot's coefficient, play a fundamental role in pressure response. Hence, permeability stress-sensitive oil reservoirs are the scope of various research in the petroleum industry for minimizing formation damage during drilling, completion, and stimulation operations. This work develops a new analytical solution for the nonlinear hydraulic diffusivity equation (NHDE) with instantaneous point-source/sink effects in Biot's effective stress-sensitive oil reservoirs. The proposed model considers Biot's effective stress change in the permeability response, and a new deviation factor is derived from comparing the nonlinear effect concerning the constant permeability classical solution and a decoupled case available in the literature. The calibration methodology is performed using a numerical simulator named IMEX®, widely used in formation evaluation works, and the results presented high convergence. The findings of this study allowed us to notice the role of overburden stress, oil flow rate, deviation factor, and Biot's coefficient in permeability change during production in the diagnostic plots. Thereby, the modeling developed in this paper becomes a useful and attractive tool for predicting and monitoring permeability loss, oil flow rate specification, and reservoir history matching.

INTRODUCTION

Coupling geomechanics to pressure transient analysis (PTA) has been an important challenge for oil industry. This coupling allows providing the role of geomechanical parameters e.g., overburden stress and Biot's coefficient in permeability loss management. PTA is used for obtaining several well-reservoir information, e.g., formation damage, permeability change, reservoir characterization and management, flow regimes identification, flow potential forecast, and reservoir extension. Hence, minimizing the economic impairments caused by the permeability loss effect during the well-reservoir life-cycle is essential to prevent premature wells abandonment and field disinvestments (Fernandes, 2021a,b). In various formation evaluation and reservoir engineering works, analytical solutions for linear hydraulic diffusivity equation (LHE) using Boltzmann transformation, Laplace and Fourier transform have been extensively applied (Everdingen and Hurst, 1949). Nevertheless, solutions for nonlinear hydraulic diffusivity equation (NHDE) remain a challenge for scientists and engineers, mostly when it involves a source term modeling (Fernandes et al., 2021; Fernandes, 2022; Fernandes et al., 2022a,b,c,d,e).
A TBM Application in Shallow and Weak Ground Conditions (Ankara-Izmir High-Speed Railway Construction Project, Türkiye)
Authors: Karahan S. , Yilmaz O. , Karsli Y. , Gokceoglu C.
Published: September 2023

Tunneling in weak ground and shallow conditions is an extremely difficult task for tunnel engineers. However, depending on the increase in demand for high-speed railways, it requires the construction of many tunnels. The weak rock mass forms the route of the T1 tunnel constructed within the scope of the Ankara-İzmir High-Speed Railway Project. The main purposes of the study are to compare the performances of NATM and TBM in a large diameter railway tunnel, and to present a successful TBM application. The length of the T1 Tunnel is 3047 m and, the tunnel is the longest tunnel of the Ankara-İzmir High-Speed Railway Construction Project. The inner diameter of the tunnel is 12.5 m. The tunnel allows high-speed train passage through a single tube, as well as an escape tunnel. With this feature, it is Türkiye's first single-tube tunnel containing both a railway and an escape tunnel. In addition, the T1 tunnel is the railway tunnel with the largest diameter in Türkiye, constructed with TBM. In the first stage, the T1 tunnel was designed in accordance with NATM principles. The estimated advance rate with NATM was estimated 2.4 m/day while that of with TBM is 10 m/days. Considering time limitation, use of TBM was decided for constructing the tunnel. The overburden along the tunnel varies between 3.7 m – 80.0 m. The lithological units along the tunnel route are gneiss, mudstone, and sandy mudstone. The rock masses along the route are highly weathered and weak character. Consequently, the T1 tunnel was constructed with TBM, successfully. Although the average advance rate was measured as approximately 16 m/day, hence the TBM outperformed. The main reasons for the high performance of the TBM are well-known geological and geotechnical conditions of the tunnel route, and the selection of a suitable TBM.
Fracture Pressure Prediction by Using the LSTM Neural Network Model
Authors: Ma Tianshou , Zhang Dongyang , Yang Min , Liu Yang , Liu Wenming , Dang Yufeng
Published: September 2023

Fracture pressure plays a vital role in petroleum drilling and hydraulic fracturing. Currently, fracture pressure is mainly predicted through logging interpretation, but its calculation process is too complicated, and its accuracy needs to be further improved. Machine learning provides a new measure to address the above problems. Therefore, this paper aims to predict fracture pressure using the Long- and Short-Term Memory (LSTM) neural network method. The fracture pressure data set was generated by logging interpretation, then the nonlinear mapping relationship between logging parameters and fracture pressure was proposed using the LSTM model, and the mesh search method was used to optimize the hyperparameters of the LSTM model, so that the prediction of fracture pressure is realized. The results indicate that the in-situ stress state follows the normal faulting regime, i.e., vertical stress > maximum horizontal stress > minimum horizontal stress. Using the LSTM model with the optimal combination of hyperparameters, the prediction accuracy was significantly improved, and the root mean square error, mean absolute error, mean absolute percentage error, and coefficient of determination of the predicted fracture pressure were 0.304 MPa, 0.176 MPa, 0.209%, and 0.990, respectively. It is concluded that the LSTM model can effectively capture the variation trend of logging parameters with depth and the correlation information of logging parameters, which can realize the accurate prediction of fracture pressure.

INTRODUCTION

Fracture pressure is a very important fundamental engineering parameter that plays a critical role in oil drilling, completion and hydraulic fracturing (Chen et al. 2008; Fjar et al. 2008; Aadnoy and Looyeh 2011; Ma et al. 2017a). In drilling engineering, fracture pressure is the basis of drilling engineering design; if the fracture pressure is less than the effective wellbore pressure, the wellbore will experience tensile fracture (e.g., wellbore fracture or lost circulation), resulting in loss of drilling fluids. Predicting fracture pressure is therefore directly related to the safety of drilling operations. Incorrect or inaccurate prediction of fracture pressure can easily cause various drilling problems, such as lost circulation, induced well blowout, induced well collapse, and drill pipe sticking (Ma et al. 2017b).
Probabilistic Prediction Method of Formation Pore Pressure
Authors: Liu Keyan , Ma Tianshou , Zhou Xiaoyu , Wang Xudong , Deng Changsong , Li Mingxing , Zhu Minghui
Published: September 2023

Formation pore pressure plays a critical role in petroleum drilling and is an indispensable basic parameter for casing program design and mud weight optimization in petroleum drilling. Formation pore pressure can be predicted using seismic, logging and mud log data. However, due to the concealment and complexity of deep formations and the inherent errors in seismic, logging and mud log data, it is always difficult to accurately predict formation pore pressure. In order to quantitatively determine the uncertainty of the formation pore pressure, a probabilistic pore pressure prediction method has been proposed. First, the basic effective stress and dc-exponent methods for pore pressure prediction were introduced. Second, the data processing procedure with sliding window treatment was presented, the statistical characteristics of Eaton index and normal compaction trend (NCT) were investigated, and the quantitative prediction of uncertain formation pore pressure was performed using the Monte Carlo simulation. Finally, the case study of the X-1 well in the Sichuan Basin was conducted, the uncertain pore pressure profile was calculated and compared with measured data, effective stress method and dc-exponent method. The results showed that the pore pressure increases with the increase of Eaton index, while it decreases with the increase of K value, so the influences of uncertain Eaton index and NCT cannot be ignored. The case study showed that all measured pore pressure data are within the pore pressure profile at the 5% to 95% confidence interval, but the conventional prediction methods cannot accurately predict the pore pressure in all cases. The present method integrates both logging and mud log data, the confidence interval pore pressure profile is more consistent with the actual situation, and it can provide significant support for casing program design and mud weight optimization in petroleum drilling.
Wellbore Stability Analysis of Inclined Shale Wells Using a Fully Anisotropic Hydraulic-Mechanical Coupled FEM Model
Authors: Qiu Yi , Ma Tianshou , Peng Nian , Liu Yang , Liu Jinhua
Published: September 2023

Shale rock is typically anisotropic in both elasticity and strength, but traditional wellbore stability models generally assume that shale rock is isotropic or partially anisotropic, and the influence of hydraulic-mechanical coupling is usually ignored, so the effect of arbitrary inclined well path on shale wellbore stability is still not fully understood. Therefore, assuming the shale to be completely anisotropic in both elasticity and strength, a hydraulic-mechanical coupled finite element model was used to investigate the effect of arbitrarily inclined well paths on the time-dependent stability of shale wellbores. The results indicated that the anisotropy of elasticity (nE=nv=2 or nE=nv=0.5) dominates the induced pore pressure and offsets/enhances the isotropic part, resulting in the induced pore pressure in an anisotropic situation being opposite/enhanced to that of the isotropic situation on the 2D cross-sectional plane of the well. As the anisotropy index of the elastic parameters increased, the effective stress increased and was deflected at a certain angle. The effective hoop stress was skewed toward higher stiffness, and the shear failure area gradually decreased. Comparison of the failure zone with different borehole trajectories showed that the influence of the bedding plane decreased when the relative angle between the borehole axis and the bedding normal was small. Therefore, avoiding drilling parallel to bedding planes is conducive to borehole stability in practical drilling.

INTRODUCTION

The commercial success of shale gas in North America has prompted a global interest in the development of unconventional oil and gas resources, including shale oil and gas, tight oil and gas, and coalbed methane (Ma et al. 2015; Soeder 2018; Wu et al. 2020; Nie et al. 2021). Horizontal drilling technology is an efficient method to develop unconventional oil and gas. However, during drilling operations, wellbore instability can lead to a series of time-consuming and costly accidents, such as sticking and burying (Fjar et al. 2008; Zhang 2013; Meier et al. 2015). Among them, 90% of wellbore instability occurs in shale formations because shale is rich in clay minerals and bedding planes, so shale rock has different mechanical properties in different directions, i.e., shale is typically anisotropic (Gholami and Rasoul 2014; Barton and Quadros 2015; Ma et al. 2020). Anisotropy makes the wellbore more prone to collapse and instability. Therefore, it is necessary to better understand the wellbore instability mechanisms in anisotropic formations.