bluuebunny/crossref_metadata_2025 huggingface dataset:
The Role of the Metaverse in Transforming Healthcare
Authors: Ramamurthy Srinivasan , Al Yammahi Sarah , Abdul Rahim Alya
Published: February 2024

To diagnose, treat, or perform surgical operations on a patient, conventional physical interactions between a patient and a doctor were necessary. Telehealth services have challenged this, enabling digital connections between patients and healthcare professionals. The metaverse, a virtual environment that permits interaction with digital objects and settings, is fast gaining traction in the healthcare industry. There is a strong likelihood that patient outcomes will be improved by technological advances such as artificial intelligence (AI), augmented reality (AR), the internet of things (IoT), virtual reality (VR), quantum computing, and robotics. Augmented and virtual reality technologies have progressed dramatically in recent years, and they are now routinely used in medical education, training, and surgical procedures to execute complex surgeries with extraordinary precision. However, as the metaverse grows, there are apprehensions about potential ethical and legal implications, such as cybercrime and data vulnerability. The objective of this review article is to examine potential uses of the metaverse in the field of healthcare as well as the issues that need to be resolved.
Qualitative Behavior Of Second Order Difference Equation with Non Positive Neutral Term
Authors: S. Kaleeswari Et al.
Published: February 2024

The oscillation of second order difference equations with a nonlinear nonpositive neutral component is the subject of this study. We come up with a sufficient condition that guarantees that all solutions to the examined equation are either oscillatory or going towards zero. Through examples, the improvement of our primary findings is demonstrated.
Effect of Heat Source on MHD Convective Flow of Non- Newtonian Fluid past an Oscillating Porous Plate in Porous Medium
Authors: Rajni Et al.
Published: February 2024

Introduction: An investigation was conducted to analyse the impact of unsteady flow caused by non-Newtonian fluid with magneto hydrodynamic properties on an oscillating plate made of porous material in a porous medium. The analysis of convective heat transfer included additional parameters such as electrically conducting unsteady flow-facing applied magnetic force. The Perturbation method was used to transform the governing equations into non-linear differential equations with utmost precision. Moreover, MATLAB was used to precisely evolve temperature and velocity profiles for different parameters such as Grashof number, Prandtl number, skin friction, magnetic parameter, and source/sink. The heat transfer rate was thoroughly evaluated and compiled using graphs and tables, guaranteeing the accuracy of the results.
Presence of multiple supernumerary premolars, distomolars, and anterior maxillary teeth in a non-syndromic dizygotic twin: A case report
Authors: Singh Sarkaria Amandeep , Ogadako Rhiyoma
Published: February 2024

Introduction: While supernumerary teeth are occasionally encountered by the dentist and multidisciplinary team, it is relatively rare for multiple supernumeraries to be found in a non-syndromic patient.

Case Report: This report describes a case in which a dizygotic twin with a history of anterior maxillary supernumeraries presents with asymptomatic late developing bilateral mandibular premolar supernumeraries and distomolars. The premolar supernumeraries were surgically removed, while the distomolars managed conservatively.

Conclusion: The importance of periodic follow-up for patients with a history of supernumeraries is highlighted alongside the significance of high quality referrals.
El aborto en la escena pública: activismos, feminismos y creaciones artísticas en la provincia de Tucumán (Argentina)
Authors: Argañaraz María Milagros
Published: February 2024

El artículo que aquí presentamos busca recuperar, describir y analizar dos expresiones artísticas en torno al aborto, realizadas desde activistas feministas de la provincia de Tucumán (Argentina) en el año 2017. Nos referimos al libro Manchón y cuenta nueva. Antología de relatos sobre abortos (2017) y la intervención callejera de la virgen que aborta, realizada por la agrupación feminista Socorro Rosa Tucumán. Ambas formaron parte de los reclamos y manifestaciones de las activistas feministas al Estado Argentino por la legalización del aborto. Para el análisis de dichas expresiones artísticas apelamos a fuentes periodísticas, información disponible en redes sociales y a una entrevista en profundidad realizada a una de las protagonistas de la intervención callejera, que fue también una de las autoras del libro mencionado. A partir del análisis realizado, es posible considerar que las producciones artísticas hablan de su época y reflejan, a través de recursos estéticos y metafóricos, algunos aspectos del clima social circundante.
El feminismo de masas: la movilización de las mujeres y diversidades en el ciclo de la marea verde (Argentina, 2015-2020)
Authors: Natalucci Ana , Messore F
Published: February 2024

En 2015, a partir de la concentración de “Ni una Menos”, se activó en Argentina un ciclo de movilización feminista conocido como la “Marea Verde” que implicó, entre otros elementos, la creación de nuevas organizaciones, la reelaboración de demandas, agendas y la conquista de nuevos derechos”. El objetivo de este artículo es reconstruir este ciclo, considerando las organizaciones que participaron, las demandas, agendas y los repertorios que permitieron la masificación de la participación. El argumento que sostendremos es que ese ciclo se abrió por condiciones externas e internas al movimiento. Este artículo muestra los resultados de una investigación llevada adelante desde 2016 para entender los cambios en la movilización social en la Argentina contemporánea durante la crisis del giro a la izquierda y la restauración conservadora desde finales de 2015. En términos metodológicos seguimos un método mixto que combina técnicas, miradas disciplinarias y perspectivas analíticas en un enfoque integrado para el estudio de fenómenos y procesos sociales.
Elementos Clave en los Currículums Latinoamericanos de Economía
Authors: Rivera Lozada Isabel Cristina , Meneses Medina Paula Andrea
Published: February 2024

En esta investigación se proponen cinco elementos clave en el currículum de los programas de economía: el conocimiento situado, la interseccionalidad, el feminismo decolonial, el pensamiento crítico y el género para subsanar las exclusiones históricas que las mujeres racializadas, pobres y colonializadas padecen en el ámbito económico de los territorios del sur global, específicamente en Latinoamérica. Partiendo del pensamiento de algunas autoras como bell hooks, Donna Haraway, María Lugones y Yuderkys Espinosa, con la perspectiva del feminismo decolonial como telón de fondo y el enfoque de género en el currículo, en los ejes problematizadores se proponen temas como la segregación laboral, feminización de la pobreza, desigualdad salarial y de ingresos, economía del cuidado, fetichización y la mercantilización de las mujeres, los cuales se tendrán en cuenta en la enseñanza de la economía en contextos de las periferias del continente americano.
Aportes a la fragmentación del binomio razón/emoción: (Co) producción de un conocimiento emocionalmente sentido
Authors: Herrera-Farfan Nicole
Published: February 2024

Este artículo tiene como objetivo destacar valor epistémico de las emociones como dato del conocimiento emocionalmente sentido en los procesos de investigación, considerando la crítica feminista a la relación piramidal y de poder entre sujeto e investigador. Duplicando los propósitos para, por un lado, contribuir desde la vereda metodológica de la investigación cualitativa y, por otro lado, mediante la forma de escritura que presenta los resultados. Se presenta entonces, una experiencia que combina la producción narrativa con elementos situados y experienciales autoetnográficos a fin de exponer la (Co)producir que posibilitó la obtención de conocimiento mediante la creación consensuada. Enfatizando la importancia narrativa para explorar y comprender cómo se imprime en el relato de una mujer la dinámica de la dominación masculina experienciada en la relación de pareja con una persona privada de libertad. Se destaca entonces, el enfoque metodológico y de creación como parte central de la discusión teórica que se expone en este artículo.
Reflexiones sobre el papel de las mujeres rurales colombianas en el trabajo
Authors: Meneses Medina Paula Andrea
Published: February 2024

El presente artículo tiene como objetivo reflexionar sobre el papel de las mujeres rurales colombianas en los trabajos, a partir de las relaciones de género percibidas en aquellos que realizan las mujeres y los hombres de una vereda del Departamento del Cauca, así como mediante reflexiones teóricas-conceptuales en torno a la educación popular, el género, los estereotipos de género, la división sexual del trabajo y el trabajo de cuidados según la perspectiva de la interseccionalidad. El ejercicio concluye con tres reflexiones encaminadas a proponer políticas públicas. En primera instancia, la necesidad de incorporar el análisis interseccional en los contextos rurales colombianos. En segunda instancia, la importancia de proponer una educación popular que tenga en cuenta aspectos como el conocimiento situado y que incluya la perspectiva de género. Y, por último, la presencia de estereotipos de género ocasiona que las mujeres rurales se concentren en trabajos de cuidados.
Experiências de docentes da Educação Infantil e da Educação Básica: o que revela o levantamento bibliográfico no contexto da Pandemia de Covid-19 (2020-2022)
Authors: Barbosa Milena Ricken , Souza Tiago Zanquêta de
Published: February 2024

Este trabalho é fruto de uma pesquisa de mestrado profissional em educação em andamento, que tem por tema as experiências de educadoras que atuaram na Educação Infantil no contexto da pandemia de Covid-19. Tem por objetivo apresentar os resultados do levantamento bibliográfico realizado à luz da abordagem qualitativa, com finalidade descritiva e exploratória, adotando-se, para isso, a seleção de teses, dissertações e artigos em bases de dados atinentes à área de educação, no recorte temporal equivalente ao período pandêmico (2020-2022). Como resultados, tem-se três pontos centrais: o primeiro, sobre o fechamento das escolas sem a interrupção das atividades inerentes a ela; o segundo, quanto ao trabalho de professoras e educadoras no contexto da Educação Básica e, por extensão, da Educação Infantil, referentes ao desenvolvimento de uma educação presencial síncrona com momentos assíncronos; e, por último, a precarização do trabalho realizado frente à  virtualização das relações escolares.
Produtividade da soja com desfolha artificial em diferentes estádios fenológicos
Authors: Lacerda Klinsmann Lima , Miranda Glauco Vieira , Hubner João Pedro Manzano , Braun Erisson Mateus Weber
Published: February 2024

A área foliar da soja está relacionada com a produtividade de grãos e é dependente das características das cultivares, como o ciclo e sua fisiologia e das condições climáticas para desenvolvimento da planta. Assim, o objetivo deste trabalho foi determinar os efeitos da desfolha em diferentes estádios fenológicos na produtividade de duas cultivares de soja. Para isto, foram instalados experimentos com as cultivares de soja M5947 IPRO e M6410 IPRO. Os tratamentos foram a combinação de desfolhas artificiais com redução de 33% e 66% da área foliar com os estádios fenológicos de V5, R1, R3 e R5. Cada experimento foi conduzido em blocos casualizados com três repetições. Houve interação significativa entre desfolhas e estádios fenológicos para cada cultivar. Para a M5947 IPRO, de ciclo mais precoce, somente a desfolha de 66% afetou a produtividade nos estádios reprodutivos, reduzindo em 25% a produtividade. Para M6410 IPRO, de ciclo mais tardio, a desfolha de 33% afetou a produtividade no estádio V5 e a desfolha de 66% no estádio R5. Conclui-se que a produtividade da soja reduz com a desfolha dependendo do estádio fenológico que incide e também é dependente do grau de maturidade da  cultivar.
POTENTIAL TOXICITY OF PESTICIDES AND ITS TRANSFORMATION PRODUCTS TO AQUATIC ORGANISMS
Authors: Ghosh Alokesh Kumar , Sarower Md. Golam
Published: February 2024

The escalation of agricultural productivity in recent decades has compelled a swift upsurge in the utilization of pesticides, ultimately leading to their presence in the aquatic ecosystem.  Pesticides and their transformed products have negative effects on the growth, reproduction, physiology, immunity, and histopathology of multiple tissues of fish. Pesticides have emerged as a significant global problem because to their potential to bioaccumulate inside various fish tissues, hence posing substantial health risks for consumers. Within this particular context, the present review aims to illustrate the potential adverse effects of pesticides and their transformed products on aquatic organisms, with a specific focus on fish. Research has revealed that the introduction of pesticides into aquatic environments might have detrimental effects on the mangroves and immunological response of fish, ultimately exacerbating the ecological impact by increasing their vulnerability to diseases. Hence, it is imperative to explore environmentally friendly, efficient, and appropriate pesticide alternatives in order to safeguard the aquatic ecosystems and the overall health of various aquatic life, particularly fish.
Frutas nativas em cervejas artesanais
Authors: Gewehr Bruna , Machado Mirian Ribeiro Galvão , Zaneti Tainá Bacellar
Published: February 2024

A utilização de frutas nativas em formulações de cervejas artesanais no Brasil apresenta, por um lado, a oportunidade de desenvolver um mercado para essas espécies, o que pode contribuir significativamente para a Segurança Alimentar e Nutricional do país. Por outro lado, é importante considerar que essa prática pode consolidar um nicho elitizado para esses produtos. Nesse contexto, o presente artigo visa discutir o uso de frutas nativas em cervejas artesanais no Brasil, analisando os desafios e oportunidades no processo. Para isso, realizou-se uma pesquisa documental de cervejas com frutas nativas brasileiras em catálogo on-line especializado. A partir dos dados, analisaram-se os desafios e oportunidades da inserção dessas frutas. A pesquisa revelou um número expressivo de cervejas artesanais, totalizando 231 (n=100%), caracterizadas por uma diversidade de frutas nativas incorporadas, abrangendo 34 espécies brasileiras distintas. As frutas mais encontradas foram a goiaba (Psidium guajava) (17,3 %), maracujá (Passiflora alata; P. cincinnata; P. edulis; P. setácea) (10,8 %), amora (Rubus brasiliensis) (8,7 %), cajá (Spondias monbim) (7,6 %), caju (Anacardium occidentale) (6,9 %), jabuticaba (Plinia cauliflora) (6,5 %) e pitanga (Eugenia uniflora) (5,8 %). Considera-se que a incorporação dessas frutas em cervejarias artesanais estimula sua produção e comercialização. As cervejas artesanais fazem parte de mercados locais nos quais a colaboração com os agricultores desempenha um papel fundamental. Compreende-se que as cervejarias artesanais têm o potencial de contribuir para o fortalecimento e a valorização das frutas nativas no Brasil, especialmente por meio da promoção dessas espécies.
the The Effect of Benson Relaxation on the Chest Pain Scale of Unstable Angina Pectoris (UAP) Patients in the HCU Ward of Bali Royal General Hospital
Authors: Ariyanti Kadek Juli
Published: February 2024

ABSTRACT

Unstable angina pectoris has a typical chest pain complaint caused by a blockage of the coronary arteries which cause oxygen cannot be supplied to the myocardial cells resulting in anaerobic metabolism causing an accumulation of lactic acid which causes chest pain. One of the non-pharmacological therapies as supportive therapy can help the performance of gold standard therapy to reduce pain felt by Benson relaxation patients. The purpose of this study was to determine the effect of benson relaxation.This study used a quasy experimental design with a pre-post test design with control group design. This study involved 30 respondents, namely 15 respondents in the intervention group who were given Benson medication and relaxation and 15 respondents in the control group who were given medication only using a purposive sampling technique and measuring instruments used the Visual Analogue Scale before and after the intervention.The results showed that the pain scale in the intervention group before being given Benson relaxation was mostly moderate pain (60%), in the control group (73.3%) experienced moderate pain. The pain scale in the intervention group after being given Benson relaxation was mostly mild pain (93.3%), whereas in the control group (73.3%) experienced moderate pain. There was an effect of Benson's relaxation on the chest pain scale of Unstable Angina Pectoris patients with a p value = 0.001 <0.05. It is recommended that giving Benson relaxation be used as a standard for non-pharmacological pain management for patients with unstable angina pectoris.
PENGARUH BUERGER ALLEN EXERCISE TERHADAP SENSITIVITAS KAKI PENDERITA DIABETES MELIITUS TIPE II DI WILAYAH MASARAN SRAGEN
Authors: Novitasari Heni , WIdiastuti Agung , Firdaus Isanul
Published: February 2024

Background: The problem of diabetes mellitus is still a problem in Indonesia. Diabetes mellitus is a condition experienced by a person when blood sugar levels increase. Diabetes mellitus includes foot wounds that can cause foot sensitivity problems. If the foot sensitivity problem is not treated, it will cause neuropathy. Objective: Knowing the effect of buerger allen exercise on foot sensitivity in patients with type II diabetes mellitus in the Masaran Health Center area. Methods: This study is a one group pre post test without control group study with purposive sampling technique as many as 20 respondents. Data analysis was tested using the Wilcoxon signed rank test. Results: The p value of 0.001 means that there is an effect of buerger allen exercise on foot sensitivity. Conclusion: With the burger allen exercise can increase perfusion in the lower extremities so that it can increase foot sensitivity in patients with type II diabetes mellitus.
Pengaruh Service Quality, Price, dan Perceived Ease of Use terhadap Customer Satisfaction Pengguna Transportasi Online Maxim
Authors: Saputra Fauzi Bagas , Wikantari Maria Assumpta
Published: February 2024

Maxim telah menjadi transportasi online yang populer di Indonesia. Industri ini memberikan keefektifan dan keefisienan melalui layanannya yang dapat diakses dengan mudah. Dalam mengatasi permasalahan masyarakat untuk memenuhi kebutuhan dan mobilitas, maka diperlukan transportasi online yang sesuai dengan harapan pengguna. Penelitian ini bertujuan untuk mengetahui, menganalisis, dan membuktikan pengaruh service quality, price, dan perceived ease of use terhadap customer satisfaction pengguna transportasi online Maxim secara parsial. Sampel penelitian ini adalah pengguna transportasi online Maxim berdomisili Jakarta Timur sebanyak 100 responden dengan metode purposive sampling. Penelitian ini menggunakan metode Partial Least Square Structural Equation Modelling (PLS-SEM) untuk menganalisis data dan dihasilkan bahwa (1) service quality berpengaruh signifikan terhadap customer satisfaction sebesar 0,462, (2) price berpengaruh signifikan terhadap customer satisfaction sebesar 0,264, dan (3) perceived ease of use berpengaruh signifikan terhadap customer satisfaction sebesar 0,246. Adapun nilai R-Square yang diperoleh pada variabel service quality, price, dan perceived ease of use memberikan kontribusi terhadap customer satisfaction sebesar 67,9% dan sisanya sebesar 32,1% dipengaruhi oleh variabel lain yang tidak diikutsertakan pada penelitian ini.
War Equipments in Kalavali Naarpathu
Authors: K Veerappan
Published: February 2024

From the ancient days to till today man has been using various types of tools to survive and protect himself. The present new tools are exemplary that the man have gradually reached the stages of development in his life through some types of tools. In that way, the Sangam literature, which is the repository of the cultural life of the Tamil people contains information about many types of instruments, equipments and tools. Kalavali Naarpathu is one text among the Eighteen anthologies which appeared after the Sangam literature. This book is based on battlefield news. All the songs in this book end with the word 'Kalathu'. The songs in it are very imaginative and metaphorical. It also talks about elephant war. This article brings out the news about 'war tools' as recorded by Poikaiyar in Kalavali Naarpathu.
Cartografando a indústria na Região Metropolitana de Campinas
Authors: Seixas Lucas Pinto , Fonseca Matias Lindon
Published: February 2024

O presente artigo buscou, por meio de mapeamento e periodização, compreender como os vetores de expansão urbana e crescimento industrial na Região Metropolitana de Campinas (RMC) se desenvolveram ao longo da segunda metade do século XX até 2018. Os resultados mostram que uma série de fatores econômicos, políticos e socioespaciais conduziram para uma configuração industrial distribuída ao longo das principais rodovias na região e que contribui para a ampliação das desigualdades socioespaciais no território metropolitano. Pode-se afirmar também que a indústria atuou como um importante condicionante no processo de urbanização na RMC com importantes mudanças no uso e ocupação da terra que asseguram as condições para o desenvolvimento do processo de acumulação do capital em bases capitalistas.
longa duração do genocídio
Authors: Glodes Blum Gustavo
Published: February 2024

Resenha do livro "Por uma arqueogeografia brasileira: a possibilidade de uma análise profunda do território a partir da Guerra do Contestado como exemplo prático", de Nilson Fraga, 2022.
Psicosfera e técnica digital
Authors: Venceslau Igor
Published: February 2024

A difusão da técnica digital tem impulsionado a disseminação de imaginários, discursos e consensos. Esses são elementos da psicosfera que constitui, ao lado da tecnosfera, o meio geográfico atual, conceituado por Milton Santos como técnico-científico-informacional. Este artigo tem por objetivo apresentar uma reflexão sobre a psicosfera atual a partir da emergência e difusão da técnica digital. A psicosfera justifica e autoriza a implementação, nos lugares, de um conjunto de inovações, antecipando-se à sua chegada. Por sua vez, a própria implementação da técnica digital amplifica e potencializa a psicosfera, possibilitando a expansão de um novo modo de consumo. Por fim, propõe-se disputar outros sentidos possíveis para a técnica contemporânea.
Espaço urbano, neoliberalismo e igrejas evangélicas
Authors: Cristina da Silva Silvana
Published: February 2024

Nos últimos anos, tem sido visível na paisagem urbana as mudanças da religiosidade no território brasileiro, marcado pela transição do cristianismo católico para o cristianismo evangélico. As igrejas evangélicas expandem-se nas periferias urbanas aceleradamente; entre elas, destacamos as igrejas pentecostais influenciadas pela Teologia da Prosperidade. Estas apresentam vasos comunicantes com a racionalidade neoliberal. Trata-se de um fenômeno complexo envolvendo as dimensões culturais, políticas, econômicas, psicossociais e espaciais, mas ainda pouco estudado pela geografia urbana. Nesse sentido, buscamos neste artigo analisar e refletir sobre os nexos entre o aprofundamento dos princípios neoliberais e o crescimento das igrejas pentecostais que desembarcam em cidades pouco afeitas à cidadania territorial, cujo espaço urbano apresenta-se cada vez mais privatizado e as sociabilidades urbanas, capturadas pelas igrejas. Tal fato tem colocado centralidade nestas instituições com relação à construção de circuitos econômicos e à formação de redes de sociabilidades. Elas conformam-se em suportes material e imaterial da vida urbana, cuja cidadania plena foi negada à maioria. Entretanto, a despeito do poder exercido por essas organizações religiosas, elas ainda são pouco consideradas nas análises do urbano no território brasileiro.
Modulation of the glycoalkaloid biosynthesis pathway in potato (Solanum tuberosum L.) and development of CRISPR/Cas9 methodology for tomato (Solanum lycopersicum L.)
Authors: Liu Ying
Published: February 2024

Steroidal glycoalkaloids (SGAs) are toxic defence substances present in Solanum species, including the tomato and potato. Concerns about SGA toxicity have long been raised regarding table potato cultivars, and more recently regarding starch potato cultivars, where SGAs negatively affect the use of proteins and fibre from starch by-products. Aiming at reducing the SGA hazard in potato, the present investigation has characterized SGA metabolism in starch and table potato cultivars. Further, using CRISPR/Cas9 technology, a number of gene-edited potato mutants with reduced SGA levels were generated, targeting the transcription factor StGAME9, as well as six key genes acting in SGA biosynthesis. Transcriptomic and metabolomic profiling revealed both differences and similarities regarding the regulation of SGA levels in starch compared to table potato cultivars. Starch potato cultivars exhibited higher basal SGA levels and dry matter content but lower protein levels compared to table potato cultivars. In all seven types of key gene mutants, a significant SGA reduction was observed in leaves, tubers at harvest, and in tubers subjected to two SGA-inducing conditions: wounding and light exposure. The regulatory role of StGAME9 in SGA biosynthesis was investigated, and key SGA-related genes regulated by StGAME9 were identified. The reduction of SGA levels in mutants was stronger when genes in the postcholesterol pathway of SGA biosynthesis were mutated, than for the pre-cholesterol ones. The results also showed that the mutation of each of these seven genes blocked both the basal and induced SGA synthesis. Notably, several mutants displayed close to SGA-free tubers and a relatively normal phenotype and tuber yield. A DNA-free genome editing method with a high mutation rate was established for the cultivated tomato, providing opportunities for extending the insights of SGA biosynthesis in potato to tomato. The generation of SGA-free starch potato cultivars now offers an interesting opportunity for industrial applications, e.g. by transforming starch by-products into economically valuable compounds.
NUMERICAL MODELING FOR DEFORMATION ANALYSIS OF A CANTILEVER BEAM
Authors: Silva Gilsomaro Barbosa de Melo , Santos Rosilda Sousa , Diniz Diego David Silva , Lima Walber Medeiros , Chaves Francisco Samuel , Simões Jackson de Brito
Published: February 2024

The tireless quest for better living conditions makes people use technological resources as manners to balance a work/economy/safety relationship. Those technological resources have been applied more frequently in engineering. This is due to development of simulation software in order to provide greater economic viability in engineering projects. The considerable growth in the infrastructure market, further promoted the application of beams in projects, linked to this is the concern with the deformations that are caused to them. In this sense, the deformation suffered by a beam was evaluated via structure analysis using the ANSYS Mechanical software. The beam is at one extremity and supported by fixed support at the other extremity. To obtain the values of deformations a beam was developed in ANSYS, and after, the deformation was found through finite element methods. To verify the methodology effectiveness proposed in this study the numerical results were compared to data obtained in the tests and theoretical calculations. Through the values obtained, it was concluded that the values obtained in the simulation present deformations very similar to the tests and the theoretical calculation.
ASSESSMENT OF SOIL COMPACTION IN AN AREA IN THE URBAN PERIMETER IN THE CITY OF PORTO VELHO/RO
Authors: De Brito Denis Lopes , Da Silva Filho Eliomar , Duarte Miqueias Lima , Aguiar Renan Froz
Published: February 2024

The lack of adequate urban planning, combined with the disorderly growth of Brazilian cities, brings a series of environmental problems resulting from human action. Among these, the pollution of soils and water bodies, soil compaction, and impermeabilization stand out. These issues lead to alterations in surface runoff and natural drainage, resulting in flooding. This study assessed the degree of soil compaction in an area located within the urban perimeter of the municipality of Porto Velho, Rondônia. The assessment was carried out using a Stolf Impact Penetrometer to measure soil penetration resistance at 18 points. Subsequently, interpolation was performed using the Kriging method to generate a continuous surface. The results show that the eastern portion of the study area, where points P6, P12, and P18 are located, and a smaller portion in the southern region, where point P16 is situated, exhibit higher values of soil penetration resistance, ranging from 2.05 to 2.47 MPa. The observed values indicate high compaction of the local clayey soil and are associated with intense demographic occupation in these areas, followed by human activities and the removal of natural vegetation. This, combined with an inefficient urban drainage system, has caused disruptions to the local population.
A CASE OF WILMS TUMOR: CASE REPORT
Authors: Moreira Renata Pereira , Alexandre Amanda Moreira , Alencar Luana Campos de Amorim , Do Nascimento Sidrayton Pereira , Mota Americo , Vieira Rafael Valois
Published: February 2024

Wilms tumor, also called nephroblastoma, is a renal neoplasm with the highest incidence in early childhood and rarely affects adults. The objective of the present study was to report a case of a child who was referred to a private clinic in the city of Petrolina - Pe to undergo an imaging exam and review the literature regarding Wilms tumor. It was developed through a case report, together with literature findings in the Pubmed database. In the report, the patient had a radiological diagnosis of Wilms tumor, indicating chemotherapy treatment and subsequent surgical intervention. In the end, it was found that the diagnosis must be made by correlating radiological and surgical findings and with the anatomopathological study.
Maximum power point tracking using a fuzzy logic control scheme
Authors: Aït Cheikh Mohamed Salah , Larbes Cherif , Tchoketch Kebir Gul Filiz , Zerguerras Ahmed
Published: February 2024

This paper proposes an intelligent control method for the maximum power point tracking (MPPT) of a photovoltaic system under variable temperature and insolation conditions. This method uses a fuzzy logic controller applied to a DC-DC converter device. The different steps of the design of this controller are presented together with its simulation. Results of this simulation are compared to those obtained by the perturbation and observation controller. They show that the fuzzy logic controller exhibits a much better behaviour.
Thermal behaviour of a multilayer media in transient regime
Authors: Tamene Youcef , Bougriou Cherif , Bessaïh Rachid
Published: February 2024

In this paper, we develop a mathematical model, which calculate the temperature and thermal contact resistance distributions in a multilayer media. This work is composed of two parts. The first part concerns the analytical solution of the conduction thermal problem for two plates, which ended in mathematical expressions giving the temperatures and thermal resistance profiles. A computer code, which calculates the analytical expressions from the values of the temperature at any time as well as the thermal contact résistance, is elaborated in the second part.
Sizing of photovoltaic systems: a review
Authors: Mellit Adel
Published: February 2024

Artificial intelligence (AI) techniques are becoming useful as alternate approaches to conventional techniques or as components of integrated systems. They have been used to solve complicated practical problems in various areas and are becoming popular more and more nowadays. AI techniques have the following features: can learn from examples; are fault tolerant in the sense that they are able to handle noise and incomplete data; are able to deal with non-linear problems; and once trained can perform prediction and generalization at high speed. AI-based systems are being developed and deployed worldwide in a myriad of applications, mainly because of their symbolic reasoning, flexibility and explanation capabilities. AI have been used and applied in different sectors, such as engineering, economic, medicine, military, marine, etc. They have also been applied for modelling, identification, optimization, prediction, forecasting, and control of complex systems. The main objective of this paper is to present an overview of the alternative approach and AI techniques for sizing of photovoltaic (PV) systems: stand-alone PV, grid-connected PV system, PV-wind hybrid system, etc). Published literature works presented in this paper show the potential of AI as a design tool in the optimal sizing of PV systems. Additionally the advantage of using an AIbased sizing of PV systems is that it provides good optimisation, especially in isolated areas, where the weather data are not always available.
Apport énergétique de la poursuite solaire sur deux axes par rapport aux systèmes fixes. Application aux capteurs plans
Authors: Koussa Mustapha , Malek Ali , Haddadi Mourad
Published: February 2024

L’objectif de ce travail consiste à montrer, dans le domaine des systèmes de conversion de l’énergie solaire, qu’ils soient photovoltaïques ou thermiques, l’intérêt énergétique de la poursuite solaire par rapport aux systèmes ayant une structure fixe, orientée plein sud et inclinée selon un angle optimal ou sur un plan horizontal. Ainsi, en premier lieu, nous avons établi une synthèse bibliographique à travers laquelle nous avons retenu des modèles proposés dans la littérature, permettant de calculer les différents angles optimums annuels, saisonniers et mensuels. Nous avons retenu également les modèles de reconstitution des valeurs de l’éclairement du au rayonnement global sur une surface d’inclinaison et d’orientation quelconque. Ceci a été suivi par une méthodologie qui permet de reconstituer l’éclairement du rayonnement global incident sur une surface munie d’un système de poursuite à deux axes. Ces modèles sont fonction des éclairements dus au rayonnement direct mesuré sur un plan normal, diffus et global mesuré sur un plan horizontal. Les données utilisées dans ce travail sont relatives à deux sites algériens, Bouzaréah et Ghardaïa situés respectivement au nord et au sud de l’Algérie. A partir de ces données, plusieurs journées représentatives pour chaque été de ciel, et des saisons de l’année ont été choisies. Comme résultats, nous avons constaté que d’un état du ciel à un autre, un système de poursuite devient avantageux ou non nécessaire. Cependant, pour un état de ciel complètement couvert, là où il n’y a que l’éclairement diffus, un plan horizontal reçoit 30 % à 45 % d’énergie supplémentaire par rapport à un système muni de poursuite et 15 % à 25 % par rapport à un système fixe. Par contre, pour une journée claire, le système de poursuite devient plus intéressant, dépendamment de la saison, il reçoit entre 30 % à 40 % d’énergie supplémentaire. Pour les journées partiellement claires, l’intérêt de l’utilisation d’un système de poursuite dépend surtout de la couverture nuageuse au cours de la journée considérée qui est caractérisée par l’indice de clarté.
Photosensitivity spectrum of long diodes with varied band base under the realization of galvanomagnetorecombination effect
Authors: Belal Tahar , Medjadi Djamel Eddine , Abdelali Mouaaid , Zair Razika
Published: February 2024

In this paper, the results of investigation of the spectral characteristics of the injectional photodiodes with a varied base are presented under the condition of the existence of Galvanomagnetorecombination (GMR) effect. This is the redistribution majority and minority charge carriers within the volume of the semiconductors in the presence of the magnetic field and the formation of non equilibrium electron hole plasma [1].
Analyse statistique et élaboration d’un atlas éolien de la vallée du Cheliff
Authors: Boukli Hacène Fouad , Kasbadji Merzouk Nachida , Loukarfi Larbi
Published: February 2024

Au vu des potentiels énergétiques solaires, géothermiques et éoliens existants en Algérie, leurs utilisations pour le développement économique de certaines régions semblent favorables. De par sa vocation agricole, et au vu des potentialités énergétiques éoliennes déterminés par l’étude préalable, l’implantation d’aérogénérateurs de pompage dans la Wilaya du Chlef semble indiqué. Le choix d’un aérogénérateur passe inévitablement par la caractérisation éolienne du site d’implantation, d’où l’attention qu’il faut nécessairement apporter à l’estimation du potentiel énergétique local. Le but du présent sujet est l’établissement de l’atlas vent de la région de Cheliff. En premier lieu, une étude statistique des mesures de vent basée sur la distribution de Weibull permet la détermination des vitesses moyennes annuelles du vent. Ceci a permis l’établissement la carte du vent de la région étudiée. La deuxième partie est consacrée à l’estimation du potentiel énergétique éolien de la vallée de Cheliff et au tracé de l’atlas de la densité de puissance de la région. Les résultats ont montré que le site de Ténès est le plus venté de la région étudiée.
Commande et analyse des performances d’une station de pompage photovoltaïque fonctionnant en régime optimal
Authors: Mansouri Mohamed Nejib , Ghanmi Nasr , Mimouni Mohamed Faouzi
Published: February 2024

Le travail présenté dans cet article étudie les performances d’une structure de pompage constituée par un moteur asynchrone accouplé à une pompe centrifuge. L’ensemble est alimenté par un générateur photovoltaïque (GPV) à travers deux convertisseurs statiques pilotés de manière indépendante. Deux stratégies de commande ont été mises en oeuvre. La première, basée sur la mesure du courant photovoltaïque assure le fonctionnement du GPV avec sa puissance maximale via la commande d’un hacheur survolteur. La deuxième, utilise le concept de la commande vectorielle par orientation du flux rotorique pour piloter le fonctionnement du moteur asynchrone entraînant la pompe centrifuge. Par ailleurs, nous avons établi dans cet article, une relation explicite permettant d’adopter la vitesse de rotation de consigne de la machine asynchrone et par conséquent, le débit de la pompe en fonction de l’état d’ensoleillement. Des travaux de simulation fournis permettent de dégager les limites statiques de fonctionnement et les performances dynamiques de la structure proposée.
Characterization of CuInSe2 thin films elaborated by electrochemical deposition
Authors: Meglali Omar , Bouraiou Assia , Attaf Nadir
Published: February 2024

In this paper, we report the elaboration and characterization of CuInSe2 thin films prepared by electrochemical deposition technique. The thin films were deposited at room temperature using two electrodes cell configuration, then they annealed under argon atmosphere at 300 °C for 30 and 45 mn. The structural and optical properties of the films were characterized respectively by means of X-ray diffraction and transmission spectrophotometer measurements. The band gap of the samples was estimated using optical transmittance. All elaborated films show the tetragonal chalcopyrite CuInSe2 with preferential orientation (112) plan. X- ray diffraction and calculation of grain size of the films show that the film annealed at 300 °C during 45 mn presents a good cristallinity, high grain size and its band gap is close to 1.1 eV.
Parametrical study of the influence of the climatic data and the construction properties on the efficiency of a collector/storage solar water heater
Authors: Teyeb Ahmed , Dehmani Leila , Kerkeni Chakib , Kaabi Lanouar
Published: February 2024

A study was undertaken on the performance of an integrated collector-storage solar water heater consisting of a cylindrical water storage tank combined with a parabolic reflector, manufactured at the Laboratory of Energetic and thermal Processes (LEPT). The theoretical determination of the heat transfer phenomena which occur in the system was used to elaborate a numerical model, needed for a parametric evaluation of the system. The parametric study identified the parameters which have the higher influence on the system efficiency and allowed us to quantify the contribution of each of them. We can notice that for the climatic data, the cold water input temperature as well as the ambient temperature showed a major effect on the warm water output. For the construction characteristics, the most influencing factors are the transmissivity of the glazing and the painting of the tank.
Etude et réalisation d’un banc d’essai pour un chauffe-eau solaire à circulation forcée dans la région des Hauts Plateaux
Authors: Yettou Fatiha , Gama Amor , Hamouda Chaâbane , Malek Ali
Published: February 2024

En premier lieu, nous rappellerons les potentialités dont l’Algérie dispose en énergie solaire et nous donnerons un aperçu sur l’état de l’art des chauffe-eau solaires actuels. Ensuite, nous présentons l’ensemble de la chaîne de mesure devant être utilisé pour la réalisation d’un banc d’essai-test chauffe-eau, avec les divers dispositifs et capteurs mis à notre disposition pour ces expérimentations, et en signifiant précisément la notion de l’acquisition de données et l’instrument utilisé à cet effet. Dans cet article, nous décrirons le fonctionnement de notre système, ainsi que la carte électronique conçue pour la commande. Un aperçu du logiciel élaboré et développé pour la gestion de l’ensemble est donné. Des résultats obtenus sur des tests expérimentaux du système de chauffage de l’eau par énergie solaire seront discutés.
Electrochemical Aided Model to Study Solid Polymer Electrolyte Water Electrolysis
Authors: Laoun Brahim , Belhamel Maiouf , Mohamed Naceur Wahib , Serir Lazhar
Published: February 2024

The aim of this study is to analyze the Proton Exchange Membrane (PEM) water electrolysis. On the basis of theoretical investigation the well know Bulter-Volmer equation and water transport characteristics through the solid electrolyte membrane were employed to simulate the electrode activation over potential and membrane ohmic over potential. Then, the simulation results were compared with the published experimental data.
Développement et expérimentation d’un cuiseur solaire à double exposition
Authors: Harmim Arezki , Belhamel Maiouf , Boukar Mebarek , Amar M’hammed
Published: February 2024

Notre travail s’inscrit dans le cadre du développement et de la vulgarisation de la cuisson solaire en milieu saharien. Un prototype a été construit par des moyens rustiques. Il s’agit d’un cuiseur solaire à double exposition muni d’un réflecteur parabolique. Dans ce papier, on présente les résultats obtenus de l’expérimentation de ce prototype effectuée à Adrar. Les résultats obtenus par les différents tests sont satisfaisants et encourageants d’autant plus que les cuiseurs solaires sont simples de construction. Notre prototype arrive à atteindre des températures favorables à la cuisson saine de différents produits et plats alimentaires.
Problématique du stockage associé aux systèmes photovoltaïques connectés au réseau
Authors: Riffonneau Yann , Barruel Franck , Bacha Seddik
Published: February 2024

Ce document pose la problématique du stockage associé aux systèmes photovoltaïques couplés au réseau. L’ajout d’un élément de stockage permet de contrôler l’injection sur le réseau pour une plus grande pénétration de l’énergie solaire dans la part de production d’électricité. Ce document fait tout d’abord une présentation rapide des systèmes photovoltaïques connectés au réseau et de la problématique de leur intégration à grande échelle. Les applications possibles avec un système de stockage connecté au réseau sont ensuite exposées ainsi que les différentes technologies existantes. Enfin, le problème de la gestion des flux énergétiques au sein de ces installations est abordé.
Conception et validation d’un programme sous Excel pour l’estimation du rayonnement solaire incident en Algérie. Cas d’un ciel totalement clair
Authors: Yaïche Mohamed Redha , Bekkouche Sidi Mohammed El Amine
Published: February 2024

Le rayonnement solaire au niveau du sol est formé principalement du rayonnement direct et du rayonnement diffus. Le rayonnement direct parvenant directement de l’angle solide délimité par le disque solaire. Tandis que le rayonnement solaire diffus parvient de toute la voûte céleste et n’a pas d’orientation privilégiée. A cause des effets de l’atmosphère, le rayonnement solaire au niveau du sol possède un caractère aléatoire. L’ensemble forme le rayonnement global. Le but de cet article est la simulation des différents flux du rayonnement solaire. Pour ce faire, nous avons adopté et choisi deux approches théoriques qui sont valables pour un ciel totalement clair. Pour l’estimation des irradiations incidentes sur un plan horizontal, nous avons utilisé le modèle de Capderou. De ce fait, nous allons ensuite exploité ces valeurs afin d’estimer le mieux possible le rayonnement solaire incident sur un plan incliné, mais en utilisant dans ce cas le modèle de Liu & Jordan. Dans ce contexte, un programme de calcul des rayonnements sous Excel pour les 48 wilayas d’Algérie a été conçu et développé. La comparaison entre les valeurs des rayonnements incidents sur les différents plans du capteur prévu par la simulation de deux approches et les mesures effectuées, montre que la simulation est une bonne approximation de la réalité, malgré quelques perturbations climatiques (nuages).
Variable speed of the wind turbine generator with DFIG connected to electric grid
Authors: Zellagui Mohamed
Published: February 2024

The variable speed wind turbine generator with doubly-fed induction generator (DFIG) is today widely used concept. This paper presents a control system of the doubly-fed induction generator wind turbine with focus on the control strategies and on active power reference value choice. The present control method is designed for supersynchronous, subsynchronous and synchronous working modes. In order to investigate the dynamic responses during step load of doubly fed induction generator connected to the electric grid (EG), a model has been developed. This model includes the mechanical drive train, the induction generator as well as the control parts.
Isothermes d’adsorption à 25 °C et 45 °C des pommes chargées de solutés et séchées
Authors: Ferradji Ali , Acheheb Hakima , Malek Ali , Hadjadj Naima
Published: February 2024

Les isothermes de sorption déterminées à 25 °C et à 45 °C sont de type II caractérisées par une forme sigmoïdale. L’équation de sorption de Guggenheim – Anderson - de Boer (GAB) a été utilisée pour déterminer la teneur en eau de la couche mono moléculaire et celle de Clausius – Clapeyron pour calculer la chaleur de sorption isostérique. L’ajustement des valeurs expérimentales au modèle de l’équation de GAB est de bonne qualité (RMS = 7.56 %, MSE = 3.85 %, P = 5.65 %). La teneur en eau de la couche mono moléculaire (Xm) est de 12.35 % à 25 °C, et de 10.31 % à 45 °C. La chaleur de sorption (Qst), à une humidité de 6 % et à 25 °C, est de 23.76 kcal/mole.
Conception, modélisation et réalisation d’un système photovoltaïque de moyenne puissance
Authors: Mrabti Tarik , El Ouariachi Mostafa , Kassmi Khalil , Olivié François , Bagui Farid
Published: February 2024

Dans cet article, nous analysons la conception, la modélisation et la réalisation d’un système photovoltaïque (PV) de moyenne puissance (100 W). Puisque la tension optimale à la sortie du générateur PV dépend très peu de l’éclairement, alors nous avons utilisé une commande MPPT de type ‘Boucle d’asservissement de la tension’, dont le rôle est de fixer la tension optimale à la sortie du générateur PV. Les résultats obtenus montrent que le système PV ainsi conçu et réalisé fonctionne dans les conditions optimales indépendamment des changements météorologiques et de la variation de la charge. Les différents résultats expérimentaux obtenus sont en très bon accord à ceux obtenus dans le simulateur Pspice.