bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on structural optimization of high-density wood panel equilibration chamber based on computational fluid dynamics
Authors: Zhan Luxin , He Fuqiang , Chen Fajiang
Published: August 2024

To guarantee the uniformity of the flow field within an equilibration chamber during the process of hot air baking and to elevate the quality of high-density wood panels, an in-depth analysis was conducted, focusing on the impact of various factors such as the number of side air inlets in the chamber, the spacing between panel gaps, and the configuration of the bottom air inlet spacing. The aim was to optimize the structural parameters to enhance the uniformity of temperature and wind speed. The results indicated that the factors influencing the flow field uniformity within the equilibration chamber were, in descending order of importance, the number of side inlets, the spacing between the bottom inlets, and the distance between the plate gaps. In addition, the optimized hot air increased the average velocity by 0.16 m/s and the average temperature by 6.44K. The percentage of boards passing the inspection of its substandard products was only 9.2%, an improvement of 11.8 percentage points, and the average moisture content was also reduced to 8.76%. The simulation and analysis program effectively improved the uniform distribution of temperature and air velocity in the equilibration chamber and improved the quality of panel production. Therefore, the adoption of this solution helps to achieve efficient drying of wood-based panels and reduce costs.
Policies and strategies for sustainable use of biochar in Indian agriculture
Authors: Sharma Peeyush , Abrol Vikas , Sharma Neetu , Sharma Reetika , Chadha Divya , Anand Shrdha , Khenrab Stanzin , Maanik  , Shabir Haziq , Singh Priti , Kumari Shruti , Verma Divyansh
Published: August 2024

Agriculture plays a fundamental role in India’s economy, supporting 70% of rural households. While often perceived as non-productive, agricultural waste harbors materials potentially beneficial to humans through the creation and utilization of biochar in the production and processing of agricultural goods. This study conducts a comprehensive exploration into the advantages and risks associated with biochar application, considering its role as a soil amendment, bioremediation agent, and its broader implications for human health and the environment. Biochar, primarily composed of stable carbon, was initially proposed as a soil amendment to sequester carbon. Efficient resource utilization has emerged as a viable means to address global environmental challenges associated with waste disposal. This review delineates diverse agricultural waste types and sources, identifies related environmental risks, and advocates for government-led measures aligned with circular economy principles to manage such waste. Furthermore, it offers insights into potential management strategies, policy considerations, and practical approaches, fostering sustainable agriculture practices and environmental conservation in India.
Estimation and action mechanisms of cinnamon bark via oxidative enzymes and ultrastructures as antimicrobial, anti-biofilm, antioxidant, anti-Diabetic, and anticancer agents
Authors: Selim Samy , Alruwaili Yasir , Ejaz Hasan , Abdalla Abualgasim Elgaili , Almuhayawi Mohammed S. , Nagshabandi Mohammed K. , Tarabulsi Muyassar K. , Al Jaouni Soad K. , Bazuhair Mohammed A , Abdelghany Tarek M.
Published: August 2024

Cinnamon is a plant with significant medicinal value that is used extensively as a spice, flavoring, and fragrance ingredient. Phytochemical characterization via high-performance liquid chromatography, antimicrobial activity against various microorganisms, anti-diabetic properties by α-glucosidase and α-amylase assessments, antioxidant activity via 2,2-diphenyl-1-picrylhydrazyl-hydrate, and total antioxidant capacities of cinnamon bark were evaluated. Moreover, antitumor potential against human breast cancer (MCF-7) and human fetal lung fibroblast (WI-38) cells of the bark extract were detected. A promising antimicrobial action towards Enterococcus faecalis, Staphylococcus aureus, Klebsiella pneumoniae, Salmonella typhi, Candida albicans, and Mucor circinelloides where the inhibition areas were 25, 23, 18, 19, 29, and 16 mm, respectively, was recorded. Cinnamon bark has IC50 of 5.01 and 2.58 µg/mL compared to standard acrobose with their IC50 values 4.32 and 1.99 µg/mL, respectively for α-amylase and α-glucosidase inhibitions. Cinnamon bark extract has IC50 of 77.39 ± 0.84 and 162.67 ± 0.28 μg/mL toward cell lines of MCF-7 and WI-38, respectively. The protective effect of cinnamon in accelerating the apoptosis of MCF-7 cells has been verified by flow cytometric evaluation employing Annexin-V and cell cycle kits, as well as the increasing levels of malondialdehyde, hydrogen peroxide, and nitric oxide with decreasing glutathione and catalase levels.
Cervical teratoma: about 2 cases
Authors: Géraud Garcia Philemon Satingo Segbedji , Mahussi Hénok Orion Akokpe , Eudes Ulrich Elvis Mahougnon Goudjo , Houénoukpo Koco , Okpéyèmi Mirinda Houedote , Antoine Séraphin Gbenou
Published: August 2024

Teratomas are malformative tumors derived from multipotent cells and composed of tissues originating from the three embryonic layers in variable proportions. The cervical location is exceptional. Through two clinical cases and literature review, we recall the main clinical, radiological, anatomopathological and progressive aspects of this condition.
La simulación de la justicia transicional y el estallido de la violencia criminal en México
Authors: Marroquín-Pineda Teresa-Isabel
Published: August 2024

¿Por qué si México transitó desde un régimen autoritario hacia uno pretendidamente democrático y se han implementado diversas instancias de justicia transicional, el país padece en el presente niveles de violencia sin precedentes? Se aventuran dos hipótesis. Primera: la forma específica en que ocurrió la transición democrática imposibilitó una justicia transicional efectiva. Segunda: la justicia transicional implementada por el primer gobierno electo democráticamente (2000-2006) fue una simulación, constituyendo una amnistía de facto para los perpetradores de violaciones de derechos humanos del pasado autoritario. Se persigue evidenciar que la modalidad en que ocurrió la transición democrática determinó los magros resultados de los mecanismos de justicia transicional, y que la impunidad ante los crímenes del pasado propició el aumento de la criminalidad en el presente.
A BRIEF REVIEW OF FIRST-ORDER COSMOLOGICAL PERTURBATIONS INCLUDING BARYONIC MATTER FROM AN EULERIAN PERSPECTIVE
Authors: Fonseca Diego F. , Castañeda Colorado Leonardo
Published: August 2024

In modern cosmology, the problem of large-scale structure formation has been studied through various analytical and computational methods and has become a cornerstone of astrophysics. The complexity of the equations that describe the evolution of small fluctuations in the matter field, with respect to the Friedmann-Lemaître-Robertson-Walker (FLRW) universe, commonly known as the theory linearized gravitational perturbations, makes it a valuable framework for describing the problem. Specifically, the approximation of sub-horizon scale allows us to explore scenarios where semi-analytical tools play a significant role in gaining a better understanding of how structures in our universe have evolved and how the cosmic web structure is formed. In this sense, these types of techniques have allowed for comparisons with extensive simulations and have provied a basis for contrasting with high-precision observations in this context. Therefore, in this paper, we present a semi-analytical description of the evolution of contrast density in cold dark matter (CDM), including baryonic matter, in a linear regime in Fourier space. We achieve this by using the Jeans filtering function (JFF), considering only growing solutions, and then comparing them with the numerical solutions calculated for the JFF equations to zero and first order, with the aim of explaining why decaying solutions must be included if one wishes to enhance precision in higher-order perturbations while also considering small scales. Finally, we discuss and extend some of the results obtained by Shoji et al. for various initial conditions in redshift.
Tecnología LiFi en la práctica: Diseño e implementación de pruebas de desempeño en dispositivos LiFi
Authors: Tobar Rosero Oscar Andrés , Castro Fernández Johan Steven , Díaz Mendoza Octavio David , Zapata Madrigal Germán , Área Salamanca Oscar Enrique , García Sierra Rodolfo
Published: August 2024

La tecnología de comunicación inalámbrica por luz visible, conocida también como Li-Fi, surge como una de las tecnologías de comunicación más prometedoras debido a su capacidad de transmitir datos de una manera no convencional. Aunque existen estudios que sugieren que Li-Fi puede ser un complemento valioso a las tecnologías inalámbricas existentes, estas investigaciones no abordan de lleno la conectividad constante y la seguridad cibernética necesarias para el uso de protocolos de comunicación en tiempo real en sistemas de automatización industrial. En este trabajo, se evalúa el desempeño de la conexión inalámbrica de dispositivos Li-Fi comerciales. Para esto, se diseñó e implementó una estructura para evaluar la conectividad constante, velocidad de transmisión y recepción utilizando protocolos de red como ICMP, así como la compatibilidad con protocolos industriales como PTP, GOOSE, SV y MMS. Se encontró que Li-Fi tiene una buena compatibilidad con estos protocolos, pero presenta desafíos en términos de disponibilidad y rendimiento, incluyendo la pérdida de paquetes y tiempos de transferencia prolongados en algunos casos particulares. En síntesis, aunque Li-Fi puede ser un complemento valioso a las tecnologías inalámbricas existentes, todavía hay desafíos importantes a resolver antes de su adopción generalizada en sistemas de automatización industrial.
Algoritmo heurístico para ubicación óptima de uPMUs considerando la mejora de la confiabilidad del sistema de distribución
Authors: Agudo Guiracocha Milton Patricio , Franco Baquero John Fredy , Tenesaca Caldas Marcelo Sebastian , Zambrano Asanza Sergio Patricio
Published: August 2024

Este artículo presenta un algoritmo para localización de fallas basado en un método de estimaciones de estado, válido para sistemas de distribución activos de media tensión. El algoritmo utiliza las mediciones registradas por unos pocos dispositivos de medición sincrofasoriales uPMUs, junto con pseudomediciones, para localizar con éxito la línea con falla. Primero se presenta la formulación de general de las estimaciones de estado bajo la suposición de que todas las barras son monitoreadas. Posteriormente, se define el método a seguir para conseguir detectar una falla con mínimo dos uPMUs. Finalmente, se desarrolla un algoritmo de localización óptima, cuyas restricciones se basan en mejorar los índices de confiabilidad del sistema. El método propuesto es validado en un sistema de distribución trifásico de 39 barras, donde el índice de confiabilidad de duración de interrupciones es reducido en un 22.01% con el despliegue de tan sólo dos uPMUs.
Achieving adaptability through various urban housing typologies
Authors: Tomajian Haik , Ojo David , Gyergyák János , Borsos Ágnes , Medvegy Gabriella
Published: August 2024

As cities continue to grow and diversify, urban planners, and architects face the challenge of creating housing solutions that can flexibly respond to many demands and changes over time. This rapid change in the urban landscape necessitates adaptable housing design typologies to meet the evolving needs of urban residents. Several residential building, typologies have emerged with the intent of solving the problems arising from overpopulation. This paper aims to shed light on the importance of adaptability in urban housing design and its potential to enhance urban living environments. It reviews adaptability through various urban housing typologies, exploring the concept, its significance, and strategies that can be employed to achieve adaptable dense housing solutions.
Wyniki badań geofizycznych oraz weryfikacyjnych badań wykopaliskowych na stanowisku nr 53 w Sadowiu, pow. opatowski
Authors: Pasterkiewicz Wojciech ,   Instytut Archeologii Uniwersytetu Rzeszowskiego, Tokarczyk Tomasz ,   Instytut Archeologii Uniwersytetu Rzeszowskiego
Published: August 2024

The aim of this article is to assess the possibility of using magnetometry to identify immovable features at the multicultural site No. 53 in Sadowie, Opatów district. A gradientometer device was used for the study, which measures the degree of variation in the Earth’s magnetic field. The research was conducted on an area of 1.25 ha within the southwestern part of the site. The obtained results were then verified in the course of excavation work. Five immovable features reflecting clear magnetic signals were exposed in the planned archaeological excavations. The excavation research provided insights into the nature of the site, documenting its extent and layout, among other things.
COOKIT: RECIPES SEARCH PLATFORM
Authors: Freitas Danielle , Ataíde Filipe
Published: August 2024

Tem pessoas que possuem interesse em cozinhar seus próprios alimentos, mas não sabem o que fazer com os ingredientes que possuem. Para isso, foi idealizado o CookIt, um site de pesquisa de receita com base em ingredientes, desenvolvido sob a prática profissional do curso de Tecnologia em Análise e Desenvolvimento de Sistemas (TADS) no Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte (IFRN). Nesse trabalho, é relatado o desenvolvimento da aplicação ao decorrer das Disciplinas de Desenvolvimento de Sistemas Web, Desenvolvimento de Sistemas Distribuídos e Desenvolvimento de Sistemas Corporativos, com relação à documentação, implementação e implantação do sistema. Além disso, são definidas as linguagens, conceitos e tecnologias utilizados durante esse período.
IMPLEMENTAÇÃO DAS METODOLOGIAS BUSINESS PROCESS MANAGEMENT E LEAN SIX SIGMA NA GESTÃO DOS PROCESSOS INTERNOS DE UMA EDITORA
Authors: Alves Iryna , Profeta de Albuquerque Vivian
Published: August 2024

As organizações estão numa luta contínua pela sobrevivência no mercado. À vista disso, devem ter a preocupação em atualização e aperfeiçoamento dos processos a fim de obter vantagem competitiva. A eficiência das empresas está ligada diretamente à eficiência de seus processos. Assim, o objetivo proposto neste trabalho é realizar um estudo de caso desenvolvido numa editora de livros e revistas, de forma a estudar o impacto da integração das metodologias Business Process Management (BPM) e Lean Six Sigma na eficiência dos processos internos. Para atingir este objetivo, recorreu-se a um questionário dirigido aos colaboradores da entidade em estudo e, complementarmente, à observação direta, através da participação em reuniões e formações. Os resultados do estudo sugerem que ambas as metodologias - BPM e Lean Six Sigma - conduzem à melhoria da gestão dos processos internos refletindo-se na maximização dos lucros da empresa, diminuição das perdas de recursos, gastos desnecessários e tempo, e consequentemente no aumento da produtividade dos colaboradores. Após a realização do presente estudo, alguns procedimentos existentes na empresa foram modernizados com o objetivo de facilitar o fluxo de informações e melhorar o desempenho nas atividades quotidianas, além de uma revisão e reformulação dos sistemas integrados, como por exemplo a adaptação à base de dados para melhor orientar o usuário. Ainda, revelou-se que os benefícios pretendidos foram alcançados pela empresa, influenciando estrategicamente a eficiência nos processos.
Message Theory: A Comparative Analysis between Western and Islamic Perspectives
Authors: Taqiyuddin Muhammad , Zarkasyi Hamid Fahmy , Ihsan Nur Hadi
Published: August 2024

The Islamic scholarly tradition is rich in fundamental related-communication concepts, including message theory. This article endeavors to undertake a comparison analysis of seminal concepts of message between Islam and Western perspectives in the field of communication science. Employing a library research approach and semiotics perspective, this study argues that aspects of the messages, that is, 'the subject of message' and 'the messenger,' have roots in the theological dimensions of Islam. This differs from the Western concept of messages, which tend to solely rational-empirically explain messages as themselves. However, some seminal concepts about messages in Islamic literature can be integrated into theories of messages in modern communication theory that are relevant to current the Islamic-based scholarly paradigm, namely the comparative-integrative framework.
Humour from the Right: Authoritarian populism and ‘punching down’ laughter in India
Authors: Chowdhury Suchi
Published: August 2024

This paper examines India’s authoritarian populist politics through a study of humorous speeches made by the nation’s prime minister, Narendra Modi, known for his Hindu supremacist right-wing stance. It qualitatively analyses Modi’s strategic use of humour that targets marginalised groups, including intellectuals, women, people with disabilities, and the Muslim community. The act of suicide and the state of widowhood have also been targets. By employing textual analysis of specific jokes and insults delivered by Modi in public forums, the study demonstrates how carnivalesque speech is used to ‘punch down’ on individuals and groups based on their identity. The paper draws a comparison with Donald Trump’s use of similar humour, noting how both leaders utilise it to destabilise their opposition and mock minorities. Using Mikhail Bakhtin’s carnival theory as a lens, which originally posits a democratic and inclusive potential to subvert power, the study argues that the ‘inverted carnival’ employed by leaders like Modi and Trump serves to consolidate power and undermine minority rights. This research introduces the concept of ‘inverted carnival’ as a new framework for analysing the use of humour in authoritarian populist governance globally.
Сomposition and mineralogy of granitoids of the Ob-Zaisan folded region in the context of the prediction of groundwater radioactivity
Authors: Sukhorukov V. P. , Sukhorukova A. F. , Novikov D. A. , Derkachev A. S.
Published: August 2024

The presented research is carried out in continuation of the works connected with studying the nature of radioactivity of drainage waters of quarries of Novosibirsk region, performed by the Laboratory of Hydrogeology of Sedimentary Basins of Siberia, INGG SB RAS, which showed that the waters of granite quarries are characterized by significantly higher radioactivity, than waters of other host rocks. The results of detailed mineralogical and geochemical studies of granitoids of the Ob-Zaisan region within the Kolyvan-Tom folded system are presented for the first time. The relevance of the present study is determined by the previously obtained data on high concentrations of uranium, thorium, and radon in drainage water of quarries developed in this territory. The granitoids of the Priobsky (Obsky and Novosibirsk massifs) and Barlak complexes were studied. It was established that the rocks of the complexes differ significantly in the spectrum of accessory minerals, which acted as the concentrators of natural radioactive and rare-earth elements: in the Barlak, in addition to apatite, sphene, and zircon, typical for all phases of the intrusion, fluorite, topaz, rutile, and minerals enriched with rare-earth elements are found: monazite, xenotime, bastnesite, parisite, less often uraninite. It was shown that a wide range of mineral-concentrators of radioactive and rare-earth elements determines higher concentrations of radionuclides in groundwater of the Barlak granitoid complex. Maximum uranium concentrations are one order of magnitude and those of thorium are two orders of magnitude higher in the groundwater of the Barlak granitoid complex compared to those of the Priobsky granitoid complex. The following peak concentrations, mg / dm3, were established in the groundwater of the studied granitoid complexes: 238U up to 1.40 and 232Th up to 2.16 · 10–3. One can predict a high background of radionuclides in the groundwater of the Barlak and Priobsky granitoid complexes, within the ranges, mg / dm3: 238U from 0.1 · 10–3 to 1.40 and 232Th from 1 · 10–6 to 2.16 · 10–3. Radon 222Rn activity in the groundwater ranges 1–50 Bq / dm3 in the contact zones of granitoids with different-aged sedimentary rocks to 600–5,000 Bq / dm3 in the areas of granitoids occurrence.
DEVELOPMENT OF A MATHEMATICAL MODEL OF AN ELECTRIC VEHICLE
Authors: Vorotnikov Mikhail Yu. ,   Nosov Magnitogorsk State Technical University, Lymarev Alexander S. , Nikolaev Alexander A. ,   Nosov Magnitogorsk State Technical University,   Nosov Magnitogorsk State Technical University
Published: August 2024

Relevance Main element of the development of electric vehicles is the reduction of greenhouse gas emissions from road transport, since electric vehicles are characterized by their indirect environmental impact — the main emission accumulates at power plants. The effective development of electric vehicles creates new opportunities by increasing electricity consumption, which in turn stimulates the growth of production and integration of alternative energy sources into the Russian energy infrastructure, diversifying the energy sector. Also, the field of electric mobility is new for the Russian Federation market. Most Russian automakers are interested in this area, developing their own platforms and models of electric vehicles, one of the obvious examples are the KAMA ATOM and electric cars of the EVOLUTE brand. As a result of the above, there is a need for research on this topic. One of the most relevant methods of studying objects, including electric vehicles, is modeling. With proper configuration of the model, it allows you to accurately assess the behavior of an object, as well as determine its technical parameters in a certain period of time, which makes it possible to study, analyze and improve the object under study. Aim of research Aim of the work is to create an up-to-date and flexible model of an electric vehicle in the MATLAB Simulink environment, allowing to evaluate the dynamic and energy performance of electric vehicles with various technical and operational characteristics. Research methods Research method is modeling, which includes the construction of a mathematical model of an electric vehicle using the MatLab Simulink software environment. This model includes a set of functional blocks from the Simscape physical network and Simulink graphical environments that describe the physical principles of vehicle movement, as well as the electromechanical characteristics of the components used, such as the engine, battery and control system. Results The main systems of the electric vehicle were identified in the work, on the basis of which, in the MATLAB Simulink environment, the appropriate functional blocks were selected and configured and a flexible model of the electric vehicle was developed, capable of changing depending on the characteristics of the electric vehicle, as well as amenable to modification and addition of peripheral systems. In addition, the presented model was tested in the work. The technical and operational characteristics of a real electric car were introduced into it and the task for movement was formed. During the execution of the task, the main indicators were removed, such as the speed characteristic, the ratio of current consumption to time, the diagram of battery discharge and voltage.
SOLAR PHOTOVOLTAIC POWER PLANT DESIGN
Authors: Khazieva Regina T. ,   Ufa State Petroleum Technological University
Published: August 2024

Relevance As part of the decarbonization strategy and transition to a low-carbon economy, the design of a solar power plant for hydrogen production, presented in this article, is a relevant and promising direction. This project can become a pilot project and identify new opportunities for creating hydrogen clusters and further development of hydrogen energy in Russia. Aim of research The object of the study is a solar power plant designed to produce hydrogen as part of the decarbonization strategy in Russia. Its design capacity, efficiency, capabilities and limitations of various components are determined. Research methods During the research, various analysis and modeling methods were used, including the SAM consultation system and other software tools. Results The article describes the concept of a solar power plant capable of efficiently using available solar energy to produce hydrogen, and identifies the potential application in the context of Russia's decarbonization strategy. As a result of the research, a model of a photovoltaic station designed to produce hydrogen was developed. Optimal system components were analyzed and selected, and an energy management strategy was developed. The practical significance of the work is to create a basis for the design and implementation of efficient and sustainable solar power plants for hydrogen production, which can help achieve decarbonization goals in Russia and improve the country's energy security. Acknowledgments: The research was carried out using a grant from the President of the Russian Federation in 2022–2024 for young scientists and graduate students carrying out promising scientific research and development in priority areas of modernization of the Russian economy. Grant recipient is Regina Tagirovna Khazieva. The priority direction of modernization of the Russian economy (direction of competition No. SP-2022 of the Grant Council of the President of the Russian Federation) is «Energy Efficiency and Energy Saving, Including Issues of Developing New Types of Fuel». Research topic: «Development and Research of a Filter Compensating Device to Improve the Quality of Electricity».
DEVELOPMENT OF A CHARGING STATION MODEL FOR AN ELECTRIC VEHICLE
Authors: Kantyukov Nikita R. ,   Ufa State Petroleum Technological University, Khazieva Regina T. ,   Ufa State Petroleum Technological University
Published: August 2024

Relevance As the number of electric vehicles increases, there is a need for more electric vehicle charging stations with advanced fast charging technologies. Since cars are equipped with high-capacity batteries, a charging station is needed for fast charging, providing high charging speed. Aim of research This article investigates the possibility of using various rectifier and inverter circuits to integrate them into an electric vehicle charging station. Research methods The presented work consists in the development of a computer model of a charging station based on the considered schemes. The simulation was carried out in the Matlab/Simulink environment. The model allows the use of various circuits of both rectifiers and inverters, as well as its further improvement. Results The authors consider the possibility of introducing various electronic components to obtain a satisfactory research result. The results obtained allow us to consider the advantages and disadvantages of the schemes under consideration. Acknowledgements: The research was carried out using a grant from the President of the Russian Federation in 2022–2024 for young scientists and graduate students carrying out advanced research and development in priority areas of modernization of the Russian economy. Grant recipient is Regina Tagirovna Khazieva.
The Inclusion-Stability, Integrity and Protection (I-SIP) Methodology and the Legal Framework to Promote Financial Inclusion in South Africa
Authors: Tuba Maphuti David , Schulze Heinrich
Published: August 2024

Studies have established that promoting financial inclusion in tandem with traditional financial sector policy and regulatory objectives such as financial stability and integrity, and consumer protection requires policymakers and regulators to take into consideration the need to minimise possible trade-offs and to maximise synergies between these objectives. However, current policies on financial inclusion do not provide a specific approach or methodology to assess the impact that these trade-offs and synergies have on new financial inclusion frameworks. This article discusses policies and regulatory frameworks to promote financial inclusion in the last 30 years since the advent of democracy in South Africa and the developing (Inclusion-Stability, Integrity and Protection) methodology to assess the impact that these trade-offs and synergies have on new financial inclusion frameworks. It begins by discussing the financial inclusion framework in the country. It also discusses the financial sector laws that promote financial stability, integrity and consumer protection, and whether these measures include the promotion of financial inclusion. It identifies the need to adopt the evolving I-SIP methodology to ensure that policymakers and regulators balance the importance of promoting financial inclusion against equally important financial sector policy and regulatory objectives, such as financial stability, integrity and consumer protection.
Dinámicas de interacción en la revisión de textos escritos en español como lengua extranjera
Authors: Bailini Sonia
Published: August 2024

Este estudio se centra en el análisis de las dinámicas de interacción que se generan entre aprendiente y docente durante la revisión conjunta de redacciones escritas en español como lengua extranjera (LE) en contextos de feedback interactivo gradual. El marco teórico de referencia es el de la teoría sociocultural y las herramientas que se utilizan para la recogida y análisis de los datos apuntan a determinar qué técnicas de feedback oral se manifiestan con mayor frecuencia y si las más frecuentes son también las más eficaces. Además, el nivel de regulación en que promueven la elaboración de uptake correctos por parte de los aprendientes se considera un elemento que contribuye a medir la eficacia del feedback interactivo gradual en el proceso de adquisición de la lengua extranjera. El corpus recogido consta de 226 episodios relacionados con el lenguaje (ERL) recopilados durante 24 tutorías en un período de 6 meses con 4 informantes universitarias italianas de nivel C1 en español/LE. Los resultados indican que las técnicas más eficaces en la revisión con feedback interactivo gradual son el feedback metalingüístico, la elicitación y la petición de aclaración.
On Topological Indices of Fuzzy Random Graph
Authors: Sarala N ,   Associate Professor, Department of Mathematics, A.D.M. College for Women (Autonomous), Affiliated to Bharathidasan University, Nagapattinam, Tamil Nadu, India, Abirami R
Published: August 2024

Objectives: Fuzzy random graphs model uncertain relationships between entities, where edges possess degrees of membership rather than binary connections. This study aims to discover how operations such as union and intersection relate to each other on the topological indices of fuzzy random graphs. By analyzing the topological indices of fuzzy random graphs, our aim is to uncover meaningful insights into the connectivity, complexity and other topological features of fuzzy random graphs. Method: The topological indices of fuzzy random graphs were determined by merging the fuzzy and random graph indices and applying them to the corresponding edges. Findings: This study investigates various topological indices, such as the Connectivity index, the Wiener index, the Zagreb indices, the Harmonic index and the Randić index, adapted to account for the fuzzy nature of graph edges. Novelty: In this work, the topological indices of a particular fuzzy random graph are also examined, and the results are presented. Furthermore, an example-based description of the relationship between operations on the topological indices of fuzzy random graphs is provided. This study describes how topological indices of fuzzy random graphs can be used to locate electric charging stations, predict protein structure and more. Keywords: Fuzzy graph, Random graph, Fuzzy random graph, Degree of Vertices, Topological indices
Design, Modelling, and FEA Analysis of Miniature Moving Magnet Compressor for Pulse Tube Cryocooler
Authors: Shinde Jitendra G ,   Research Scholar, Mechanical Engineering, Department of Technology, Shivaji University, Kolhapur, India, Khot Maruti M
Published: August 2024

Objectives: This research aims to design a miniature moving magnet compressor for pulse tube cryocoolers, suitable for applications in space exploration, medical devices, and precision scientific instruments. The goals include modeling the compressor with CAD tools, performing finite element analysis (FEA) to assess and enhance mechanical and thermal performance, and validating improvements in vibration reduction, noise minimization, and thermal efficiency. Method: The design process commenced with an in-depth analysis of cryocooler requirements, followed by creating a detailed compressor model using advanced CAD software to ensure accurate geometrical and material specifications. FEA was utilized to predict the compressor’s mechanical and thermal behavior under various operating conditions, focusing on key parameters such as displacement, magnetic flux density, and stress distribution. The optimized design reduced vibration levels by approximately 40%, and noise levels by 10 dB. Additionally, the compact design allowed for better integration into cryocooling systems, thereby enhancing overall performance and achieving a thermal efficiency improvement of 15%. Findings: FEA results demonstrated that the proposed compressor design met the desired operational parameters while maintaining structural integrity and thermal efficiency. The optimized design significantly reduced vibration and noise, which is essential for the effective operation of pulse tube cryocoolers. Additionally, the compact design allowed for better integration into cryocooling systems, thereby enhancing overall performance. FEA results demonstrated that the proposed compressor design met the desired operational parameters while maintaining structural integrity and thermal efficiency. Specifically, the design achieved a displacement of 0.5 mm, a maximum magnetic flux density of 1.2 T, and a stress distribution with a peak value of 150 MPa. Novelty: The research introduces a moving magnet compressor with a considerably smaller footprint than traditional designs, achieved without compromising performance. The incorporation of advanced materials and precise FEA was pivotal in optimizing the compressor's performance characteristics. This development represents a pioneering advancement in cryocooling technology. The research introduces a moving magnet compressor with a considerably smaller footprint—reducing the size by 30% compared to traditional designs—without compromising performance. The incorporation of advanced materials and precise FEA was pivotal in optimizing the compressor's performance characteristics. Keywords: Design, Modeling, FEA analysis, Moving Magnet Compressor, PTC
Distribution and Characterization of Heavy Mineral Placer Deposits along the Central Tamil Nadu Coast, India
Authors: Joevivek V. , Chandrasekar N. , Saravanan S.
Published: August 2024

The study of heavy minerals in coastal areas provides insights into placer deposition mechanisms, economic mineral enrichment, and the origin of placer deposits. This study describes the distribution and characteristics of heavy mineral placer deposits between Thirukadaiyur in the north and Velankanni in the south along the central coast of Tamil Nadu, India. Sediment samples were collected at 5 km intervals throughout the berm region and brought to the laboratory for heavy mineral separation and quantitative analysis. Single crystal X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray technology (EDX) were used to analyze the structure and composition of heavy minerals. Quantitative results show that magnetite, ilmenite, garnet, zircon and rutile are the dominant heavy minerals in beach sand. The presence of heavy minerals was confirmed by microscopic and XRD analysis, and SEM and EDX results confirmed their properties and origin. Overall, mineralogical and petrological studies have revealed the transport mechanism and variables affecting the process of placer enrichment along the coast.
Ganga Basin Sediment (GBS): A Potential Geological Reference Material for Tropical Rivers
Authors: Khan Faizan Ahmad , G.P. Gurumurthy , Muguli Tripti , Alam Mahboob , Sharma Anupam
Published: August 2024

The Himalayan river system (HRS) constitutes a major conduit for continental material transport to the adjacent oceans. The unresolved geological complexity and active tectonics of the Himalaya bring heterogeneity in sediment geochemistry. There is no known certified reference material (CRM) that represents the geochemical heterogeneity of HRS and large tropical rivers (LTR) though they rank first in terms of sediment transport and water discharge. As an ongoing exercise to develop reference material to calibrate the instruments and to validate the geochemical results, a river bedload sediment sample from the Ganga river basin (GBS) which is representative of both HRS and LTR was collected in sufficient quantity and characterized for its geochemical composition using inductively coupled plasma instrumentation techniques (ICP-OES and ICP-MS). The GBS has been analyzed for major, trace, and rare earth elements (REEs) to infer the homogeneity and suitability of geological material for reference material characterization through the test of reproducibility and representativeness. The precision of measurement (% RSD) within and across the four analytical sessions is less than < 7 % for most of the elements measured. The method is validated with respect to precision, limit of detection (LOD), limit of quantification (LOQ), and measurement uncertainties by analyzing CRMs. The concentration values of GBS are reproducible. The GBS composition also showed a good correlation with published datasets from the HRS and LTR. Thus, the GBS sample is developed as a potential matrix matching geological standard for geochemical studies of the Himalayan river sediments as well as other large tropical river systems.
Tratamiento de agua segura basado en la naturaleza en el chaco, Paraguay. Año 2023
Authors: Giesbrecht Karl , Méndez Fulgencio , Valdez Nolberto
Published: August 2024

Este artículo presenta la problemática del acceso al agua en el contexto del Chaco paraguayo y la alternativa que la Organización No Gubernamental (ONG), Pro Comunidades Indígenas (PCI), junto con las comunidades indígenas y campesinas de la zona, ha venido ensayando para buscar solución a la problemática; desde el acceso al agua hasta el desafío de su tratamiento y potabilización para el consumo humano. El enfoque metodológico de esta investigación es cualitativo, empleando la observación-participante y entrevistas semiestructuradas con técnicos, coordinadores de la institución ejecutora del sistema de agua segura basado en la naturaleza y líderes comunitarios. Además, se realizaron consultas bibliográficas y revisión de documentos institucionales de PCI para obtener datos secundarios. Los resultados de este estudio arrojan la descripción de las experiencias y las lecciones aprendidas de PCI sobre un sistema de tratamiento de agua segura basado en la naturaleza, que utiliza los llamados biofiltros, como piedra, grava, arena y carbón. Este artículo parte de los ensayos para la construcción del sistema, la explicación del funcionamiento de este hasta su implementación en las comunidades. El sistema de agua segura basado en la naturaleza resulta efectivo para poblaciones pequeñas y proporciona una solución a una problemática de larga data en el territorio chaqueño. Su construcción es fácil, de corto plazo y mucho menos costoso que el sistema convencional de tratamiento de agua. Así también, la construcción conjunta del sistema con los pobladores, la capacitación técnica a los mismos en su operación y mantenimiento, contribuyen enormemente a la sostenibilidad de este. Este artículo es una contribución a la identificación, aplicación y estudio de sistemas de agua adecuados para zonas de difícil acceso a este líquido vital, como es el caso del Chaco paraguayo. Además, se trata de un sistema innovador y ecológico, es decir, amigable con el medio ambiente.
Servicios ecosistémicos: su vinculación y valoración en matrices de paisajes productivos ganaderos en el Chaco Húmedo. Año 2018
Authors: Gugliotta-Ruggeri Fosco Emmanuel , Aranda-Espinoza María Lidia , Ortiz Romy Ana María
Published: August 2024

El paisaje productivo ganadero en las fincas Playada, La Piedad, San Francisco y La Rafaela, región occidental de Paraguay, se erige como modelo representativo con aptitudes para producción y conservación de servicios ecosistémicos. Mediante categorización con ArcGIS 10.3, se identificó que los pastizales y sabanas cubren aproximadamente el 35% del área total, alrededor de 5,716 hectáreas. El estudio, basado en homogeneidad a escala paisaje, permitió analizar características físicas, distribución, cobertura y presiones antrópicas en cinco Unidades Ambientales Homogéneas (UAH). La caracterización de servicios ecosistémicos reveló que los remanentes boscosos proveen servicios de regulación, provisión y culturales, mientras que los pastizales son los principales proveedores de servicios de soporte. Con fichas técnicas para cada UAH, se propusieron estrategias de conservación como sistemas silvopastoriles y planificación predial, derivadas de la producción sostenible, en beneficio de productores y ecosistemas, subrayando la importancia del conocimiento de la dinámica de paisajes productivos para la optimización de recursos y la sostenibilidad a largo plazo.
Transformación de espacios desde la perspectiva no lugares: estudio de caso de la ciudad de Chillán, Chile. Año 2023
Authors: Parada-Ulloa Marcos , Bustamante-San Martín José
Published: August 2024

El presente trabajo es un estudio que describe y analiza la transformación de cuatro espacios en la ciudad de Chillán (Chile), desde la perspectiva teórica de los no lugares de Augé. El estudio muestra cómo la creciente urbanización y globalización ha contribuido a la homogeneización y estandarización de los espacios públicos en la ciudad, lo que ha llevado a la proliferación de no lugares que carecen de identidad y significado cultural para la población local. Estos espacios contemporáneos se caracterizan por ser anónimos, transitivos, furtivos y funcionales, por ejemplo: autopistas y peajes, estacionamientos y centros comerciales. Ahora bien, como objeto de este estudio se aborda los casos siguientes: Plaza de Armas de Chillán; Feria de Chillán; Centro Comercial de Chillán y la Estación de Ferrocarriles de Chillán. Los cuatro, ofrecen la posibilidad de aplicar una metodología de trabajo práctico a partir de la descripción y análisis de textos fotográficos, los que constituyen un complemento para ampliar el análisis social sobre cómo se relaciona la población local con estos lugares y no lugares, y cómo afecta la vida cotidiana, social y cultural de la ciudad. Asimismo, se destaca el valor de los espacios públicos, habitados y vistos como lugares de encuentro y convivencia, y cómo el aumento de no lugares reduce el alcance de la vida social organizada y participativa de estos espacios de identidad en la ciudad.
Acción climática transnacional en América del Sur: El caso de la Iniciativa Gran Chaco Proadapt. Periodo 2015-2021
Authors: Pacheco-Alonso Agustina , Kurt-Kiessling Christopher
Published: August 2024

Desde la firma del Acuerdo de París, se ha avanzado en la institucionalización de un nuevo modelo de gobernanza climática que prevé la articulación de múltiples actores en la construcción de la acción climática. Así, la finalidad del presente artículo es plantear un estudio de caso de acción climática transnacional centrado en la adaptación al cambio climático en América del Sur, el caso de la Iniciativa Gran Chaco Proadapt. El objetivo del trabajo es analizar el modelo de gobernanza transnacional y transfronteriza de dicha iniciativa, así como estudiar el impacto que dicha iniciativa tuvo sobre el desarrollo humano de las comunidades que habitan en la región y se han sido sujetos activos en la construcción de la iniciativa. Para los propósitos de este estudio, la estrategia metodológica propuesta responde a un estudio de caso interpretativo, con el objetivo de generar contribuciones a la producción de conocimiento regional sobre acción climática y gobernanza transnacional del cambio climático, adaptación al cambio cli- mático, así como vínculos entre acción climática y desarrollo. El estudio parte de una realidad regional donde la necesidad de promover el desarrollo ha sido entendida sistemáticamente como contrapuesta a la acción climática. El análisis del caso demuestra que la acción climática desarrollada en el marco de redes de gobernanza policéntricas y multiescalares tiene el potencial de constituirse como una herramienta de gran valor en la promoción del desarrollo, visto desde una perspectiva de las libertades y capacidades de los individuos y comunidades.
La violencia de Género. En la construcción de políticas de control y sanación
Authors: Cortes Monsalve Lilia ,   Universidad Libre
Published: August 2024

La violencia contra la mujer en Colombia se ha convertido en un fenómeno cada vez más recurrente y que ocasiona la vulneración de múltiples bienes jurídicos tutelados por el Estado, a través de diversas conductas, siendo la más grave de ellas la del feminicidio. Este delito se caracteriza no solo por su gravedad, sino también por lo complejo que resulta demostrar su ocurrencia, pues en su configuración pueden confluir, además de factores sociales, económicos y culturales, múltiples hechos y circunstancias, lo que se traduce en que la investigación y sanción de este tipo de crímenes sea tarea desafiante para los operadores de justicia. Igualmente, ha representado un reto para el Estado la adopción de políticas públicas para la prevención de la violencia contra la mujer, pues las estadísticas oficiales sobre la materia demuestran que los casos en que se materializa este tipo particular de violencia, se mantiene una tendencia ascendente. En este sentido, es necesario aplicar todos los esfuerzos necesarios en procura de que se cumpla con las obligaciones de prevención, investigación y sanción de casos constitutivos de violencia contra la mujer, en especial de los feminicidios, al ser la conducta más grave entre ellos, motivo por el cual el trabajo de investigación examina la metodología de la autopsia psicológica como una herramienta con validez científica que puede constituirse en una alternativa para el estudio de los feminicidios en Colombia y contribuya a la prevención de los mismos.
CIMA Brief #27: How Inequal is Learning in Latin America?: An Analysis of Socioeconomic and Indigenous Skill Gaps
Authors: Näslund-Hadley Emma , Alonzo Haydeé
Published: August 2024

Socioeconomic and indigenous status contribute significantly to achievement gaps across subjects and grade levels. Mathematics gaps between low and high socioeconomic status students widen from third to sixth grade, notably in Brazil and Uruguay. Language gaps are particularly large in Brazil, Colombia, Guatemala, Panama, Peru, and Uruguay. Indigenous sixth graders score lower than non-Indigenous peers, with the largest gaps in Costa Rica and Panama and the smallest in Honduras. A significant portion of the achievement gap between indigenous and non-indigenous students in mathematics and science is attributed to indigenous status.
RESEÑA BIBLIOGRÁFICA
Authors: Rosselli Pilar Franco , Miranda Esquivel Daniel Rafael
Published: August 2024

Rangel, J. O., P.D. Lowy & M. Aguilar. 1997. COLOMBIA DIVERSIDAD BIOTICA 11. Universidad Nacional de Colombia. 436 págs. ISBN 958-608-125-7. Precio US$ 20.00. Disponible en el Instituto de Ciencias de la Universidad Nacional A.A. 7495, Bogotá.
LA FAMILIA PHAKOPSORACEAE EN EL NEOTROPICO - II
Authors: Buriticá C. Pablo
Published: August 2024

Se citan y describen todas las especies neotropicales de los géneros: Arthuria, Nothoravenelia, Uredopeltis, Kweilingia, Aplopsora y Pucciniostele. Se delimita y precisa el concepto de estos genéros, incluidas varias nuevas para la ciencia.