bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of target-controlled infusion of remifentanil in combination with propofol on anesthesia and endotracheal intubation response in patients undergoing surgical aneurysm clipping
Authors: Yang Shijie , Wu Yaqin , Chen Jingli , Li Shenghua
Published: March 2024

Purpose: To investigate the effect of target-controlled infusion of remifentanil in combination with propofol on anesthesia and endotracheal intubation response in patients undergoing surgical aneurysm clipping.

Methods: The clinical data of 106 patients undergoing surgical aneurysm clipping at the Central Hospital of Wuhan, Wuhan City, China from September 2020 to December 2022 were retrospectively analyzed. Subjects in control group were given fentanyl intravenous infusion anesthesia while study group was treated with target-controlled infusion anesthesia of remifentanil combined with propofol. Hemodynamics and blood-gas indices were evaluated before anesthesia (T1), immediately after endotracheal intubation (T2) and at extubation (T3). The incidence of anesthesia-related complications was determined.

Results: In study group, the agitation score was decreased compared to that of control group, while the Ramsay sedation score was increased (p < 0.05). The incidence of cough during endotracheal catheter indwelling and extubation was 7. 27 % in study group, which was less than 21. 57 % in control group (p < 0.05). The cough score of study group was also reduced (p < 0.05). There were no significant differences in the SpO2 and PetCO2 values between the two groups at different times (p > 0.05). Furthermore, the mean arterial pressure at T2 and T3 was upregulated and heart rate (HR) was downregulated in study group (p < 0.05). Recovery time of spontaneous respiration, time of eye-opening and extubation in study group were decreased compared to control group (p < 0.05).

Conclusion: Target-controlled infusion of remifentanil in combination with propofol improves anesthetic effect in patients undergoing surgical aneurysm clipping, reduces tracheal intubation reaction, maintains hemodynamic stability and improves recovery quality of patients. Future study will be required to evaluate the efficacy and optimal effective concentration in a diverse population.
Financial Impact Of Medical Waste Management In Hospital "X" Surabaya
Authors: Prasetya Isnan , Wilujeng Susi Agustina
Published: March 2024

The increase in the volume of medical waste is in line with the improvement of medical waste management performance and compliance with government regulations. Hospitals have another challenge in medical waste management with higher treatment costs that have a direct impact on financial aspects. Based on these problems, this study aims to evaluate medical waste management by comparing the level of hospital compliance with regulations and technical aspects, assessing the generation of medical waste and assessing the financial aspects of recycled medical waste management. The research method is structured observation to collect information and facts in the field so that a systematic description can be accomplished. The results of this study show that X Hospital, Surabaya has complied with the laws and regulations. The results of the study of medical waste generation obtained an average generation in the inpatient room of 88.20 Kg / day and the average waste generation per inpatient patient of 1.15 Kg / day and for outpatients of 0.05 Kg / day. The composition of recycled waste is 18.94%, infectious waste is 57.50%, pharmaceutical packaging waste (Hazardouse waste) is 10.90%, cytotoxic waste is 0,06% and sharps waste is 1.25%. The financial analysis generated from recycling activities on used hazardouse waste packaging, used syringes, used infusion bottles other than blood and/or body fluid infusions, and/or used hemodialysis fluid packaging obtained a NPV value > 0 and BCR value = 1.98 > 1, so this investment is economically feasible and the investment plan is recommended to be implemented.
ROBUSTEZ Y POTENCIA DE LA T-STUDENT PARA INFERENCIA DE UNA MEDIA ANTE LA PRESENCIA DE DATOS ATÍPICOS
Authors: Flores Muñoz Pablo , Muñoz Escobar Laura , Velasco Castelo Geoconda
Published: March 2024

Estudios previos revelan que las muestras con datos atípicos, alteran el error tipo I y tipo II de la prueba t-Student para inferencia sobre una media. La metodología que estos trabajos usan para simular datos extremos consiste en mezclar dos normales distintas con el fin de contaminar los datos. Pensamos que esta técnica no es la más adecuada, puesto que esta nueva muestra no es necesariamente una normal, con lo cual se está incumpliendo con el principal supuesto de la prueba. En el presente trabajo se repite esta metodología con el fin de comprobar los problemas descritos, pero además se generan datos atípicos a partir de una sola normal sin necesidad de realizar ninguna contaminación, usando esta última metodología y mediante un proceso de simulación estocástica se estima la probabilidad de error tipo I y tipo II, a partir de lo cual, contrario a los estudios previos, se concluye que la t-Student es una prueba robusta ante la presencia de datos atípicos y que su potencia no depende del número de datos extremos generados en la muestra.
Development of Virtual Reality-Based Project-Based Learning Media and its Effectiveness for Historical Thinking Skills
Authors:   Student, Magister of Social Education, Faculty of Teacher Training and Education, University of Jember, Indonesia, Sari Arti Permata , Umamah Nurul ,   Department of History Education, Faculty of Teacher Training and Education, University of Jember, Indonesia, Na’im Mohamad ,   Department of History Education, Faculty of Teacher Training and Education, University of Jember, Indonesia
Published: March 2024

This development research aims to produce a Virtual Reality Media product based on Project Based Learning that is validated by experts and its effectiveness on Historical Thinking Skill. The development model used is the ASSURE Model. The development of this media has gone through stages of expert validation, user trials, small group trials, and main field trials involving 32 students to determine the level of effectiveness of the developed product. Data analysis was done using paired sample t-tests and effectiveness tests using eta squared formula. The expert validation results consisted of three experts: media design validation with a score of 4.5 (Above Average), subject matter validation with a score of 4.7 (Outstanding), and language validation with a score of 4.9 (Outstanding). In the user trial results, a score of 4.7 (Outstanding) was obtained. The expert validation results for media design showed that the media can be used with minimal revisions, while the validation results for subject matter, language, and user trials showed that the media can be used without revisions. The effectiveness test results of the media on historical thinking skills showed a value of 0.801 in the small group trial and a value of 0.61 in the large group trial, placing the effectiveness test results in the "large effect" category. Based on the effectiveness test results, the Virtual Reality media based on project-based learning has been proven to have a significant effect in improving students' historical thinking skills.
Eight Benefits of Regular Exercise for the Diabetic Patient
Authors:   Resident physician in the Department of Podiatric Medicine at St. Barnabas Hospital, USA, Chittenden Keith
Published: March 2024

Summary of 8 major physiological complications from diabetes. Each complication is discussed and the benefits from exercise that a patient with diabetes can get as a result in engaging in regular exercise is discussed for each one of the 8 complications. The eight areas of benefits from exercise are controllable heart rate and blood pressure, stabilized blood sugar, better healing of venous statis wounds, improved flexibility, Improved balance/proprioception, improved mental health, improved skin health, and decrease in body mass index.
Role of Artificial Intelligence in Higher Education- An Empirical Investigation
Authors: Iffath Unnisa Begum
Published: March 2024

The importance of artificial intelligence (AI) is growing in all economic sectors and thus also in higher education. In recent years, there have been significant developments in this concept of "Artificial Intelligence in Education (AIED)". The purpose of this study was to find out how the concept of artificial intelligence can be applied to teaching and learning in higher education and the implications of the use of artificial intelligence in higher education. The impact of the development of technologies on learning is often studied on the methods and scope of learning and teaching. Artificial intelligence enables higher education services to become easily accessible with extraordinary speed, not only in the classroom but also outside the classroom. This report seeks to explore how AI will become an integral part of universities and seeks to examine its immediate and future impact on various aspects of higher education. The challenges of implementing AI in these institutes were also explored. As artificial intelligence (AI) research in education increases, many researchers in the field believe that the role of teachers, schools and leaders in education will change. In this regard, the aim of this study is to investigate which are the possible scenarios for the arrival of artificial intelligence in education and what impact it can have on the future of schools. In this research, it confirmed that artificial intelligence has been widely adopted and used in various forms in education, especially educational institutions. Artificial intelligence was initially implemented in the form of computers and computer-related technologies, moving to web-based and web-based intelligent educational systems, and finally with the use of embedded computing systems and other technologies such as humanoid robots and web-based chatbots teachers & tasks and assignments independently or with tutors. With these platforms, teachers could perform various administrative tasks such as grading and Work more effectively and efficiently and achieve higher quality in your learning activities. On the other hand, because the systems use machine learning and adaptability, the curriculum and content are adapted which improved uptake and retention, which improved the student experience and the overall quality of education.
An Overview of Mechanical Engineering and its Latest Technologies
Authors: S. Rajkumar  , B. Vijayalaxmi  , D. Srinivas  , B. Praveen  , M. Neel Kamal
Published: March 2024

Mechanical Engineering plays a significant role in the advancement of cutting-edge technologies. Whether it is development in the field of nanotechnology, biomedical Engineering or renewable energy, Mechanical Engineers are at the forefront of innovation. Their ability to apply principles of physics and mathematics to solve complex problems make them indispensable in pushing the boundaries of technology and driving progress in various industries. Mechanical Engineering also contributes to economic growth and development. By designing efficient manufacturing processes and creating cost-effective solutions, Mechanical Engineers help businesses improve productivity and competitiveness. They contribute to job creation, as their skills are in demand across a wide range of industries. Mechanical Engineering has a strong focus on problem solving and critical thinking. The ability to analyze and solve complex problems is highly valued in today's dynamic and rapidly evolving world. Mechanical Engineers are trained to think analytically, work with precision and consider multiple factors when designing solutions. Their skill set is not only applicable to Mechanical systems but can be transferred to other disciplines as well.  Mechanical Engineering is a field that has evolved and transformed over centuries, shaping the world we live in today. From the earliest machines and inventions to the sophisticated technologies used in modern industries, Mechanical Engineering has played a pivotal role in shaping our society. This paper explores the rich history of Mechanical Engineering, highlighting key milestones, innovations and latest technologies that have propelled the field forward.
Experimental Investigation of Green Concrete
Authors: Dr.A. Karthik  , S. Bharathi  , Dr.A.M. Arunmohan  , Arwin S  , Hariharan A
Published: March 2024

To mitigate pollution and promote material reuse, natural coarse aggregates are substituted with recycled aggregates. This substitution not only facilitates the reduction of carbon dioxide emissions but also contributes to environmentally friendly practices. This research delves into the criteria for selecting materials suitable for recycled aggregates. The study involved replacing natural aggregates with recycled aggregates at varying percentages (0%, 20%, 40%, 60%, 80%, 100%). The incorporation of recycled aggregates in specific proportions enhanced the properties of both fresh and hardened concrete, particularly up to the optimum percentage, as demonstrated through tests such as the slump test and compressive strength test, splitting tensile strength. Laboratory test results revealed decrease in compressive strength as the percentage of recycled aggregate increases. Nevertheless, up to a 20% replacement level, the mixtures attained the desired mean strength. Consequently, for structural concrete, it is feasible to replace natural aggregates with recycled aggregates within the range of 20%.
EXPLORING THE DIGITAL LANDSCAPE: STUDENT PERSPECTIVES ON THE FUTURE OF ACCOUNTING
Authors:   Department of financial-Accounting, Faculty of Economic Sciences, University of Oradea, Oradea, Romania, MATICA Diana-Elisabeta , MOTOCA Roxana-Florina ,   Department of financial-Accounting, Faculty of Economic Sciences, University of Oradea, Oradea, Romania, STURZ Andreea-Florina ,   Department of financial-Accounting, Faculty of Economic Sciences, University of Oradea, Oradea, Romania, MOCIAR COROIU Sorina ,   Department of financial-Accounting, Faculty of Economic Sciences, University of Oradea, Oradea, Romania
Published: March 2024

The goal of this paper is to better comprehend the importance of digitalisation related to Romanian accounting profession. In this regard we started by reviewing the scientific papers approaching the digitalisation and artificial intelligence topic in accounting field. Then we conducted an empirical study that analyses students’ behavior when dealing with digitalisation in accounting field, having as main objective to illustrate both the positive and negative aspects perceived by students regarding the digitalisation of the financial-accounting field, especially the accounting profession. The empirical research was carried out between April 2023 and May 2023, and the research method used was the survey, the instrument used being the questionnaire. This has been fulfilled by 118 at the bachelor level students in the accounting field from the Faculties of Economics, within the University of Oradea. This paper is going to validate the different importance given to digitalisation, by accounting professionals in Romania. The research questions that this study aims to answer are: How necessary do they consider specialized courses in digitalizing accounting to prepare them for the changes brought about by this process? What are their preferences regarding teaching methods in accounting digitalisation courses: online, onsite, or in a hybrid format? A significant part of those surveyed considers that the positive effects of digitalisation in accounting include reducing waiting times, increasing work efficiency, facilitating access to information, and reducing paper consumption. However, there are also negative aspects, such as the risk of data loss due to technical issues or security breaches. To maximize the benefits and minimize the risks, it is essential for accountants to understand and apply accounting principles and standards correctly. Digitalisation should complement, not replace, professional judgment.
Integration of Spirituality, Values and Ethics in Leadership Practice and Theory in Egypt
Authors: Ahmed Abubakar
Published: March 2024

Purpose: The aim of the study was to investigate the integration of spirituality, values, and ethics in leadership practice and theory.

Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries.

Findings: Integration of spirituality, values, and ethics in leadership practice and theory in Egypt shows a strong emphasis on Islamic principles and teachings. Leaders often draw upon religious values to guide their decision-making and ethical behavior. This integration fosters a sense of moral responsibility and accountability among leaders, promoting ethical leadership practices. However, there is also a need for a balance between religious principles and modern leadership theories to ensure inclusive and effective leadership.

Unique Contribution to Theory, Practice and Policy: Social network theory, Graph theory & Complex systems theory may be used to anchor future studies on the integration of spirituality, values, and ethics in leadership practice and theory. Design and implement leadership development programs that explicitly incorporate components related to spirituality, values, and ethics. Advocate for the implementation of policies and regulations that institutionalize ethical standards within organizations and industries.
Aprendizaje del lenguaje SQL en el programa educación, mención informática de la Universidad del Zulia
Authors: Díaz Pérez Alfredo José , Gómez Bejarano Franklin José , Figueroa Ortega Carlos Luis , Durán Rubio Andrés Eduardo
Published: March 2024

El propósito de la presente investigación fue describir los contenidos tratados por los docentes de educación, mención informática para el aprendizaje del SQL. Esta responde a la necesidad de formar a los estudiantes del programa Educación, Mención Informática de la Universidad del Zulia (LUZ) en el uso de este lenguaje. Se fundamentó teóricamente en las teorías de Silberschatz et al (2014), Oppel y Sheldon (2010), Ramos (2018), Millán (2012) y Godoc (2014), entre otros. El estudio fue de tipo descriptivo de campo, con diseño no experimental, transeccional. La población estuvo constituida por cinco (05) docentes adscritos al Programa Educación, Mención Informática de La Universidad del Zulia, Núcleo Costa Oriental del Lago. Se utilizó la totalidad de la población como muestra. La técnica utilizada para la recolección de datos fue la encuesta mediante el cuestionario, diseñado con proposiciones afirmativas y escala tipo Líkert, utilizando como alternativas de respuesta: Siempre, Casi siempre, A veces, casi nunca y nunca. El mismo fue sometido a validez de expertos y se estimó la confiabilidad con un valor de 0,76 de acuerdo al coeficiente Alfa de Cronbach, catalogándose como alta. Los resultados arrojaron que se debe reforzar el aprendizaje de los elementos teórico-prácticos del SQL, enfatizando en las instrucciones para la administración de las estructuras de datos y la data en sí misma. De esta manera, se formarán profesionales competentes con su entorno laboral.
Facebook, una posibilidad para educarnos en red
Authors: Ayala Osorio María del Pilar
Published: March 2024

Este artículo es el resultado del proyecto de investigación La promoción de lectura y la producción de textos para estudiantes de grado noveno a través de la red social Facebook, el objetivo de esta investigación fue promover la lectura y la producción de textos a través de la red social Facebook para aumentar su comprensión y producción de textos en los estudiantes de grado noveno de la Institución Educativa Ismael Perdomo de Cajamarca Tolima. La metodología utilizada fue mixta, pues se tuvieron en cuenta instrumentos de tipo cuantitativo, como una prueba diagnóstica y la aplicación de la unidad didáctica se hizo a partir de lo propuesto por Daniel Cassany y la concepción sociocultural de lectura y escritura. Uno de los hallazgos de esta investigación es la imperante necesidad de que la escuela integre herramientas tecnológicas al proceso de enseñanza aprendizaje.
Aproximaciones bibliométricas sobre el abordaje de la migración venezolana contemporánea
Authors: Ramírez Javier , García Guiliany Jesús , Gallego Girlesa
Published: March 2024

La migración es considerada como uno de los fenómenos de mayor relevancia en la actualidad, lo cual ha despertado en el ámbito académico un interés por comprender dicho fenómeno desde su complejidad y especialmente en la ola migratoria venezolana como una de las más grandes de la edad contemporánea. Es partir de ello, que el presente estudio busca identificar las tendencias científicas asociadas con el fenómeno migratorio venezolano en la actualidad. Para el abordaje metodológico se plantea un estudio de índole documental, fundamentado en técnicas bibliométricas para la observación de la producción científica en la base de datos de Scopus, con una ventana de observación de entre el 2015 y el 2023. Los hallazgos permiten reconocer que países como Estados Unidos, Colombia, Brasil, Venezuela y España son las que concentran la producción científica relacionada con la migración venezolana. Además de un crecimiento sostenido en el interese de la comunidad académica con un 76% de la producción científica concentrada entre los años 2020 y 2023.
The Load-Bearing System from the Perspective of Sustainable Building
Authors: Hassan Osama A. B. , Rezaei Hamid
Published: March 2024

The building sector has a great potential to achieve goals for sustainable development by promoting environmental quality, economic effectiveness, and social improvement. One aspect that can possibly be considered in this context is the design of the building structure. The purpose of this case study is to investigate how the choice of a load-bearing system of building can affect the amount of concrete and steel reinforcement used in the foundation and its impact on the economy and environment. An alternative structural system of an existing building is proposed. The load-bearing frame walls and spread concrete foundations under walls are replaced by load-bearing timber columns that are placed on separate concrete footing pads. The results show that the amount of concrete and steel in the proposed system have considerably been decreased compared to the reference building. Consequently, this results in minimizing the construction costs as well as the resulting emissions of carbon dioxide into the environment.   This case study reviews practical engineering design aspects that can be used by structural and construction engineers to help achieve sustainability goals of the built environment.
 
Received: 10 September 2023 | Revised: 23 February 2024 | Accepted: 8 March 2024
 
Conflicts of Interest
 The authors declare that they have no conflicts of interest to this work.
 
Data Availability Statement
Data sharing not applicable – no new data generated.
 
Author Contribution Statement
Osama A. B. Hassan: Conceptualization, Methodology, Software, Validation, Formal analysis, Investigation, Data curation, Writing - original draft, Writing - review & editing, Visualization, Supervision, Project administration. Hamid Rezaei: Conceptualization, Methodology, Software, Validation, Formal analysis, Investigation, Data curation, Writing - original draft, Writing - review & editing, Visualization.
LESSONS FROM PHAN CHAU TRINH'S ECONOMIC THOUGHTS FOR VIETNAM TODAY
Authors:   Ho Chi Minh University of Banking, Vietnam, Tran Mai Uoc
Published: March 2024

PhanChau Trinh (1872 - 1926), the leader of the Duy Tan movement, with his economic thoughts, left a bold mark on Vietnam's development history in the late 19th and early 20th centuries. From going through and clarifying the main contents of PhanChau Trinh's economics thoughts, the article also points out and analyzes the lessons that Vietnam can apply to its renovation, development and integration processes today.
THE TRANSFORMATIONS IN THINKING - POLICY - ECONOMIC LIFE IN VIETNAM DURING THE PERIOD OF RENOVATION (1986-2022)
Authors: Pham Nguyen Phuong , Pham Thi Luong Dieu
Published: March 2024

"After 35 years of implementing the Renovation policy in Vietnam (1986-2022), the country has achieved a ""socialist-oriented market economy that continues to develop; improved growth quality..."". This success can be attributed to significant shifts in economic mindset, positive changes in economic policies, and subsequent advancement in economic livelihood. Objective: Evaluate the transformation of economic mindset, policy changes, and economic livelihood during the 35-year implementation of the Renovation policy in Vietnam. Motivation: Affirm the success of the Renovation policy in shaping the Party's economic leadership mindset and its influential role in Vietnam. Methodology: Three-part structure: historical description, evaluation, and conclusion. Research methods include historical analysis, logical reasoning, statistical analysis, and comparison."
TRAINING HUMAN RESOURCES FOR SUSTAINABLE DEVELOPMENT IN CONTEMPORARY VIETNAM
Authors: Nguyen Anh Tuan , Nguyen Thi Thuy Giang
Published: March 2024

This article initiates an analysis of the multifaceted, symbiotic relationship between human resource development and sustainable progress. It accomplishes this by providing a comprehensive survey of the fundamental tenets of Marxist philosophy concerning human nature, the formation and evolution of personality within an appropriate cultural and educational contexts to cultivate a workforce capable of satisfying the demanding requisites of sustainable development. Primarily, this concerns individual development and, concomitantly, the sustainable economic, social, and environmental advancement of the nation. To achieve this objective, the article also expounds upon the concept of "human resources," correlated terminology such as "training," diverse perspectives on sustainable development, and Vietnam's standpoint regarding sustainable economic, social, and environmental development. The discussion delves into the prerequisites of this development for human resource training and, inversely, the function of human resource development in ensuring the nation's sustainable growth. All these facets are scrutinized from a multitude of angles within the context of Vietnam's zealous pursuit of economic marketization, socialist orientation, modernization, transition to a knowledge-based economy, the fourth industrial revolution, digital transformation, and the green shift, all within the milieu of pervasive globalization profoundly shaping the world's interconnected existence.
Financial capabilities and behavior of the population in Georgia: challenges and perspectives
Authors: Kokashvili Nanuli , Vanishvili Merabi , Sosanidze Maka
Published: March 2024

The article, based on the latest literary sources and rich factual materials, analyzes the peculiarities of the financial behavior of the population in Georgia, defines the segmentation of the Georgian population according to financial ability and money management style. Six segments of Georgian population are represented according to financial capabilities. These segments are grouped under three corresponding socioeconomic statuses. Last three segments are grouped under the socioeconomic status of financially adapted and it comprises 28.3% of Georgian population. Another two segments are grouped under the socioeconomic status of more or less financially adapted and it comprises 35.9% of Georgian population. The remaining segment, i.e. 32.4% of Georgian population, has socioeconomic status of being into financial hardship. We used 23 theses (related to a money management) for in-depth analysis of techniques of money management that are widely-spread in Georgian population. We analyzed conclusions of above-mentioned theses and identified the following 6 segments of Georgian population according to the style of money management: financially responsible (34%); with financial fears (22%); with business thinking (12%); burdened with debts (16%); wasteful (11%) and "shopaholic" (5%).
Можливості децентралізації систем теплопостачання в газифікованих багатоквартирних будинках радянської забудови в м. Києві
Authors: Пасічник Павло , Погосов Олександр , Кулінко Євген
Published: March 2024

Підвищення якості опалювання багатоквартирних будинків радянської забудови є актуальною задачею протягом десятирічь. Більшість таких будинків обладнані газовим устаткуванням різних типів, що спонукає розглянути можливість переходу споживачів на індивідуальне опалення. Такий перехід потребує ряд інженерних рішень та розрахунків щодо теплових втрат, гідравлічних характеристик газопроводів тощо. В статті наведено дані щодо технічного переоснащення реального газифікованого будинку серії 1-КГ-480 («чешка») в місті Києві. В роботі підкреслено технічні можливості переходу на індивідуальне газове теплопостачання.
Competencias digitales docentes y su relación con la deserción universitaria
Authors: Madera Fernández Bernardino Esteban , Uc Rios Carlos Antonio
Published: March 2024

La deserción universitaria, con su complejidad de causas, se ha vuelto un tema crucial, especialmente en el contexto de la pandemia. Este estudio aborda específicamente la relación entre la falta de competencias digitales docentes y la deserción en UTESA-Sistema Corporativo durante la crisis del Covid-19. Adoptando un enfoque ex post facto y una estrategia asociativa explicativa, se encuestó a 322 docentes y 373 estudiantes desertores. Ambos grupos fueron seleccionados de poblaciones más amplias, y se les aplicaron encuestas con preguntas de opción múltiple y escalas de Likert. El análisis se basó en un modelo estructural relacional con 9 constructos y 16 hipótesis, respaldado en parte por herramientas estadísticas como SMART-PLS v4.0 y SPSS v29.1. Las conclusiones destacan que la falta de competencias digitales en los docentes impacta significativamente en la deserción estudiantil, atribuyéndose esto a la insuficiente capacitación en el uso de medios digitales. Esta carencia contribuye a la baja motivación y actitud negativa de los estudiantes hacia el proceso de aprendizaje, subrayando la necesidad de fortalecer las habilidades digitales docentes para mejorar la retención estudiantil.
Simulating record-shattering cold winters of the beginning of the 21st century in France
Authors: Cadiou Camille , Yiou Pascal
Published: March 2024

Abstract. Extreme winter cold temperatures in Europe have huge societal impacts on society. Being able to simulate worst-case scenarios of such events for present and future climates is hence crucial for short and long-term adaptation. In this paper, we are interested in low-probability cold events, whose probability is deemed to decrease with climate change. Large ensembles of simulations allow to better analyse the mechanisms and characteristics of such events, but can require a lot of computational resources. Rather than simulating very large ensembles of normal climate trajectories, rare event algorithms allow sampling the tail of distributions more efficiently. Such algorithms have been applied to simulate extreme heat waves. They have emphasized the role of atmospheric circulation in such extremes. The goal of this study is to evaluate the dynamics of extreme cold spells simulated by a rare event algorithm. We focus first on winter cold temperatures that have occurred in France from 1950 to 2021. We investigate winter mean temperatures in France (December, January, and February) and identify a record-shattering event in 1963. We find that, although the frequency of extreme cold spells decreases with time, their intensity is stationary. We applied a stochastic weather generator approach with importance sampling, to simulate the coldest winters that could occur in a factual and counterfactual climate. We hence simulated ensembles of worst winter cold spells that are consistent with reanalyses. We find that a few simulations reach colder temperatures than the record-shattering event of 1963. The atmospheric circulation that prevails during those events is analyzed and compared to the observed circulation during the record-breaking events.
Spurious numerical mixing under strong tidal forcing: a case study in the South East Asian Seas using the Symphonie model (v3.1.2)
Authors: Garinet Adrien , Herrmann Marine , Marsaleix Patrick , Pénicaud Juliette
Published: March 2024

Abstract. The role of mixing between layers of different density is key to how the ocean works and interacts with other components of the Earth System. Accounting correctly for its effect in numerical simulations is therefore of utmost importance. However, numerical models are still plagued with spurious sources of mixing, originating mostly from the vertical advection schemes in the case of fixed coordinates models. As the number of phenomenon explicitly resolved by models increases, so does the amplitude of resolved vertical motions and the amount of spurious numerical mixing; and regional models are no exception to this. This papers provides a clear illustration of this phenomenon in the context of simulation of the South East Asian Seas is provided, along with a simple way to reduce it. This region is known for its particularly strong internal tides and the fundamental role they play in the dynamic of the region. Using the Symphonie ocean model, simulations including and excluding tides and using a pseudo third-order upwind advection scheme on the vertical are compared to several reference datasets, and the impact on water masses in assessed. The high diffusivity of this advection scheme is demonstrated, along with the importance of accounting for tidal mixing for a correct representation of water masses. Simultaneously, an improvement of this advection scheme to make it more suitable for use on the vertical is provided. Simulations with the new formulation are added in the comparison. We conclude that the use of a higher order numerical diffusion operator greatly improves the overall performance of the model.
Surface processes and drivers of the snow water stable isotopic composition at Dome C, East Antarctica – a multi-datasets and modelling analysis
Authors: Ollivier Inès , Steen-Larsen Hans Christian , Stenni Barbara , Arnaud Laurent , Casado Mathieu , Cauquoin Alexandre , Dreossi Giuliano , Genthon Christophe , Minster Bénédicte , Picard Ghislain , Werner Martin , Landais Amaëlle
Published: March 2024

Abstract. Water stable isotope records in polar ice cores have been largely used to reconstruct past local temperatures and other climatic information such as evaporative source region conditions of the precipitation reaching the ice core sites. However, recent studies have identified post-depositional processes taking place at the ice sheet's surface modifying the original precipitation signal and challenging the traditional interpretation of ice core isotopic records. In this study, we use a combination of existing and new datasets of the precipitation, snow surface and subsurface isotopic compositions (δ18O and d-excess), meteorological parameters, ERA5 reanalyses, outputs from the isotope-enabled climate model ECHAM6-wiso, and a simple modelling approach to investigate the transfer function of water stable isotopes from precipitation to the snow surface and subsurface at Dome C, in East Antarctica. We first show that water vapor fluxes at the surface of the ice sheet result in a net annual sublimation of snow, from 3.1 to 3.7 mm water equivalent per year between 2018 and 2020, corresponding to 12 to 15 % of the annual surface mass balance. We find that the precipitation isotopic signal cannot fully explain the mean, nor the variability of the isotopic composition observed in the snow, from annual to intra-monthly timescales. We observe that the mean effect of post-depositional processes over the study period enriches the snow surface in δ18O by 3.3 ‰ to 6.6 ‰ and lowers the snow surface d-excess by 3.5 ‰ to 7.6 ‰ compared to the incoming precipitation isotopic signal. We also show that the mean isotopic composition of the subsurface snow is not statistically different from that of the surface snow, indicating the preservation of the mean isotopic composition of the surface snow in the top centimetres of the snowpack. This study confirms previous findings about the complex interpretation of the water stable isotopic signal in the snow and provides the first quantitative estimation of the impact of post-depositional processes on the snow isotopic composition at Dome C, a crucial step for the accurate interpretation of isotopic records from ice cores.
Incremental learning for rainfall-runoff simulation on deep neural networks
Authors: Chen Zeqiang , Li Jiashun , Xiao Changjiang , Chen Nengcheng
Published: March 2024

Abstract. Rainfall-runoff simulation based on deep learning always costs plenty of time for training with large datasets. This may affect quick decision making in some flood emergency decision-making situations. To address this issue, this study proposes an incremental learning method to accelerate rainfall-runoff simulation with deep learning model. The method consists of two components, regular training and incremental operation. In regular training phase, the model is regularly trained using historical data. In the incremental operation phase, the method selects representative samples from historical data with distribution estimation metrics and time series similarity metrics, then updates the regularly trained model with the sampled data and recent data in case of emergency. The proposed method was tested using ten hydrological observation stations in the Yangtze River and Han River drainage basin, with three different modified Recurrent Neural Networks. The results show that the incremental learning method achieves a training efficiency acceleration of over 4 times, with only a little increase in percentage error and decrease in Nash-Sutcliffe efficiency coefficient. The results also illustrate the robustness of this method for different models in different places, as well as during continuous incremental scenarios. The findings indicate that the incremental learning method has great potential applications in rapid rainfall-runoff simulation for flood emergency decision-making.
A data-centric perspective on the information needed for hydrological uncertainty predictions
Authors: Auer Andreas , Gauch Martin , Kratzert Frederik , Nearing Grey , Hochreiter Sepp , Klotz Daniel
Published: March 2024

Abstract. Uncertainty estimates are fundamental to assess the reliability of predictive models in hydrology. We use the framework of Conformal Prediction to investigate the impact of temporal and spatial information on uncertainty estimates within hydrological predictions. Integrating recent information significantly enhances overall uncertainty predictions, even with substantial gaps between updates. While local information yields good results on average, it proves insufficient for peak flow predictions. Incorporating global information improves the accuracy of peak flow bounds, corroborating findings from related studies. Overall, the study underscores the importance of continuous data updates and the integration of global information for robust and efficient uncertainty estimation.
An insight into the capability of the actuator line method to resolve tip vortices
Authors: Melani Pier Francesco , Mohamed Omar Sherif , Cioni Stefano , Balduzzi Francesco , Bianchini Alessandro
Published: March 2024

Abstract. The actuator line method (ALM) is increasingly being preferred to the ubiquitous blade element momentum (BEM) approach in several applications related to wind turbine simulation, thanks to the higher level of fidelity required by the design and analysis of modern machines. Its capability to resolve blade tip vortices and their effect on the blade load profile is, however, still unsatisfactory, especially when compared to other medium-fidelity methodologies such as the lifting line theory (LLT). Despite the numerical strategies proposed so far to overcome this limitation, the reason for such behavior is still unclear. To investigate this aspect, the present study uses the ALM tool developed by the authors for the ANSYS® Fluent® solver (v. 20.2) to simulate a NACA0018 finite wing for different pitch angles. Three different test cases were considered: high-fidelity blade-resolved computational fluid dynamics (CFD) simulations (to be used as a benchmark), standard ALM, and ALM with the spanwise force distribution coming from blade-resolved data (frozen ALM). The last option was included to isolate the effect of force projection, using three different smearing functions. For the postprocessing of the results, two different techniques were applied: the LineAverage sampling of the local angle of attack along the blade and state-of-the-art vortex identification methods (VIMs) to outline the blade vortex system. The analysis showed that the ALM can account for tip effects without the need for additional corrections, provided that the correct angle of attack sampling and force projection strategies are adopted.
ANALISIS KEMAMPUAN LITERASI SAINS PESERTA DIDIK PADA MATA PELAJARAN IPA KELAS VII UPT SPF SMPN 35 KOTA MAKASSAR
Authors: Suwito Angelin Wardiarini , Asdar Asdar , Safira Ifa
Published: March 2024

Penelitian ini dilakukan dengan tujuan untuk mengetahui kemampuan literasi sains pada peserta didik kelas VII-5 dalam mata pelajaran IPA digunakan  pada kemampuan literasi sains peserta didik dalam aspek kompetensi mata  pelajaran IPA dan untuk mengetahui faktor-faktor yang mempengaruhi literasi  sains mata pelajaran IPA pada peserta didik di SMPN 35 Kota Makassar. Jenis penelitian ini adalah penelitian Kualitatif. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah observasi, wawancara, dan Tes. Hal ini dapat dilihat pada hasil penelitian, analisis kemampuan literasi sains peserta didik  pada mata pelajaran IPA Kelas VII UPT SPF SMPN 35 Kota Makassar yang  berjumlah 28 orang peserta didik yang menunjukkan bahwa hasil kemampuan literasi  sains peserta didik masih rendah atau masih di bawah rata-rata dari nilai KKM  (belum mampu) dimana hasil kerja peserta didik itu tidak seorang pun bisa  mendapat nilai 100, hanya banyak memperoleh nilai di bawah rata-rata KKM. Adapun beberapa faktor yang menjadi penyebab antara lain yaitu, peserta didik hanya Sebagian yang mampu memehami konsep dan yang lainnya hanya memahami sebatas teori. Selain itu, kurangnya motivasi belajar, latar belakang Pendidikan peserta didik pada mata pelajaran IPA, fasilitas yang kurang memadai, dan belum lengkapnya alat serta bahan yang disediakan di ruang laboratorium yang menyebabkan kemampuan literasi sains peserta didik rendah. Hal ini juga memengaruhi rendahnya pemahaman konsep peserta didik pada mata pelajaran IPA. Hal ini ditandai dimana guru tidak menstimulus kemampuan literasi sains peserta didik dalam proses pembelajaran literasi sains pada aspek kompetensi peserta didik.
PENINGKATAN MOTIVASI BELAJAR SISWA PADA PEMBELAJARAN IPS MELALUI MEDIA POP UP DI SD 1 LANCIRANG SIDRAP
Authors: Amirullah Tri Putri , Yunus Muhammad , Burhan Burhan
Published: March 2024

Penelitian ini bertujuan untuk mengevaluasi peningkatan semangat belajar anak-anak dalam pembelajaran Ilmu Pengetahuan Sosial di SD 1 Lancirang dengan memanfaatkan media pembelajaran berbentuk Pop-Up.Jenis penelitian menggunakan model Kemmis dan Mc Taggart yang terdiri dari empat unsur utama, yakni persiapan, pelaksanaan, pengamatan, serta evaluasi. Sampel peneIitian ialah murid-murid kelas IV SD 1 Lancirang yang berjumlah 15 individu, terdiri dari 9 murid laki-laki dan 6 murid perempuan.Teknik analisis data pada penelitian ini yaitu tindakan kelas adalah pengamatan, evaluasi, serta pengumpulan dokumen. Berdasarkan penelitian pra siklus, hasilnya menunjukkan bahwa hanya 60% dari seluruh siswa yang mampu memenuhi persyaratan kemajuan belajar. Dari 15 siswa, ada 6 siswa masih belum mencapai standar yang ditetapkan. Namun, pada siklus II, terjadi peningkatan sebesar 13% pada jumlah siswa yang mencapai tingkat prestasi tinggi, sehingga mencapai 73%. Meskipun begitu, terdapat 4 siswa dari total 15 siswa yang belum mencapai standar yang ditetapkan. Kemudian dalam periode kedua, semua murid yang hadir berhasil memenuhi standar kelulusan dengan mencapai skor tinggi dalam kuesioner. Berdasarkan informasi yang diberikan, dapat dihitung bahwa seluruh siswa yang hadir berhasil memenuhi standar kelulusan dengan 100% siswa mencapai skor kuesioner dalam kategori yang tinggi. Kriteria untuk menentukan keberhasilan penelitian ini yaitu jika lebih dari atau sama dengan 75% siswa kelas I SD Negeri 1 Lancirang mendapatkan skor kuesioner dengan klasifikasi yang tinggi.
Kata kunci: Motivasi Belajar, Media Pop Up
PENGARUH MODEL PEMBELAJARAN PROJECT BASED LEARNING TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN IPA DI MASA PEMBELAJARAN TATAP MUKA TER BATAS KELAS IV SDN LIMBUNG PUTERI KABUPATEN GOWA
Authors: Namirah An , Asdam Muhammad , Masni Masni
Published: March 2024

An Namirah. 2022. Pengaruh model pembelajaran project based learning terhadap hasil belajar siswa pada mata pelajaran ipa di masa pembelajaran tatap muka terbatas kelas IV SDN limbung puteri Kabupaten Gowa. Skripsi, Program Studi Pendidikan Guru Sekolah Dasar. dibimbing oleh Muhammad Asdam dan Masni. Penelitian ini bertujuan untuk mengetahui pengaruh penerapan model pembelajaran project based learning terhadap hasil belajar siswa pada mata pelajaran IPA di masa pembelajaran tatap muka terbatas kelas IV. Penelitian ini di laksanakan di SDN Limbung Puteri Kabupaten Gowa tahun ajaran 2021/2022. Metode penelitian yang digunakan adalah penelitian experimen one-group pretest-posttest. Sampel penelitian ini berjumlah  27 siswa terdiri dari 11 perempuan dan 16 laki-laki. Dari hasil nilai rata-rata (mean) pretest adalah 67.92 dan berada pada kategori masih rendah, sedangkan rata-rata (mean) postest 91,85 berada pada kategori sangat tinggi nilai rata-rata pada postest lebih tinggi dibandingkan nilai rata-rata pretest. Hasil penelitian untuk uji-t diperoleh thitung > ttabel diperoleh (10,50 >1,796) maka H0 ditolak H1 diterima diterima. Dengan demikian dapat di simpulkan bahwa terdapat pengaruh model pembelajaran project based learning terhadap hasil belajar siswa pada mata pelajaran IPA di masa pembelajaran tatap muka terbatas kelas IV SDN Limbung Puteri Kabupaten Gowa.
 
Kata Kunci : project based learning, hasil  belajar siswa