bluuebunny/crossref_metadata_2025 huggingface dataset:
FERRAMENTAS DE TIC: COMPORTAMENTO DAS VENDAS E GESTÃO DE NEGÓCIOS NA PANDEMIA DO CORONAVÍRUS
Authors: Santos Yan Vieira dos
Published: August 2024

O seguinte artigo visa analisar o comportamento do mercado ante a utilização de ferramentas de Tecnologia da Informação e Comunicação (TIC) em diversos segmentos econômicos, analisando seu uso e gerência nas vendas durante o período de pandemia do Covid-19. Foi necessária uma aplicação de formulário on-line, constituindo uma abordagem qualitativa, possuindo um caráter descritivo, procedendo-se primeiramente um levantamento bibliográfico sobre e-commerces e ferramentas comerciais, como as mídias sociais, seguindo para a coleta e análise de dados através da aplicação do questionário. É importante mencionar que mesmo com a crise econômica e de saúde estabelecida no Brasil, negócios que praticam o bom uso dos dispositivos tecnológicos mais comuns ao consumidor, em maioria, obtiveram aumento em suas vendas, contrastando com a consequente diminuição de lucros para aquelas empresas que demoraram a entender ou optaram pela aplicação dessas ferramentas.
CULTURA MAKER, TECNOLOGIAS ASSISTIVAS E INTERNET DAS COISAS (IoT): APERFEIÇOAMENTO E VALIDAÇÃO DE PROTÓTIPO DE BAIXO CUSTO PARA ACESSIBILIDADE DE PESSOA COM DEFICIÊNCIA
Authors: Silva Nicacio Erikson Pedro , Silva Oliveira Gabriel , Gomes Araújo Hector Hêndrio , Souza Soares Emiliana , Araujo da Silva Humberto
Published: August 2024

Baseado no ponto de vista das tecnologias assistivas e Internet das Coisas (IoT), o presente trabalho tem como objetivo apresentar o desenvolvimento de um protótipo de uma tecnologia assistiva composta por uma bengala eletrônica e um aplicativo para smartphone que visa contribuir para a acessibilidade de deficientes visuais sob a perspectiva de práticas de cultura maker. Quando associado ao piso tátil, o uso do protótipo torna possível a identificação dos setores de um recinto pelo deficiente visual, através de avisos audíveis transmitidos para o usuário por meio de seu smartphone mediante a detecção de um determinado cartão de identificação, ou tag, presente no piso tátil. Para a construção dessa tecnologia assistiva proposta, foi empregado o microcontrolador ESP 32 e a ferramenta tecnológica denominada Identificação por Radiofrequência (RFID – do inglês Radio Frequency Identification). Dessa forma, o protótipo comunica-se com um aplicativo via  conexão bluetooth, de modo que o ESP 32 encaminha para o usuário a informação referente a sua localização com base na identificação realizada por um leitor RFID quando este detecta um cartão de identificação RFID.  Metodologicamente, trata-se de uma pesquisa bibliográfica e experimental, considerando literaturas acerca dos conceitos e tecnologias abordadas neste trabalho. O projeto continua em andamento, porém com grau avançado na realização de testes práticos de usabilidade, visando seu aprimoramento. Os resultados parciais já assinalam a viabilidade do protótipo e a relevância de seus benefícios, inclusive para utilização em contexto escolar, com perspectivas futuras de novas pesquisas.
CULTURA MAKER E AUTOMAÇÃO PARA A AGRICULTURA FAMILIAR: PROPOSTA DE IRRIGAÇÃO DE BAIXO CUSTO COM MICROCONTROLADOR ARDUINO
Authors: De Lima Campos Kassio Gabriel , Vitória Calisto de Almeida Havana
Published: August 2024

Neste trabalho, apresenta-se proposta de desenvolvimento de protótipo de baixo custo para irrigação automatizada com arduino, a ser aplicada em agricultura baseado na perspectiva da cultura maker. No que tange aos aspectos metodológicos, segue-se a pesquisa de cunho bibliográfico sobre os tipos de irrigação, microcontrolador e automação, bem como realização de testes para simulação utilizando software Tinker Cad. O intuito é desenvolver tecnologia de baixo custo, para contribuir com a eficiência no âmbito da agricultura, visando à diminuição de desperdícios com água e eletricidade, mão de obra empregadas no campo, assim como a aumentar a produtividade do campo.
ANÁLISE QUALITATIVA DAS DECISÕES GERENCIAIS PARA MANTER A CONDIÇÃO FINANCEIRA E ATUARIAL DOS REGIMES PRÓPRIOS DE PREVIDÊNCIA SOCIAL.
Authors: Vera Lucia Cruz  , Lacerda da Silva Maria Eduarda , De Lima Ianneska Barreto , Rayane Bezerra da Silva  , Rafael Macedo de Lima
Published: August 2024

A pesquisa teve como objetivo analisar as decisões gerenciais tomadas para manter a condição financeira e atuarial dos Regimes Próprios de Previdência Social. Para atender o objetivo do estudo, a pesquisa foi classificada como uma abordagem qualitativa. Quanto aos meios, como documental, e teve, como objetivo, descrever os resultados levantados pelo estudo, o qual evidenciou que uma das decisões tomadas pelos RPPS girava em torno das necessidades de mudança de alíquota para manter o equilíbrio financeiro e atuarial, muito em função da reforma da previdência através da EC nº. 103/2019, que acarretou a Portaria nº. 1.348/2019. Em outros, foram identificadas as sugestões de aumento da alíquota. Apenas os estados do Ceará, Maranhão e Roraima foram os que tomaram a decisão de reduzir a porcentagem. Com base nos achados, o estudo concluiu que existem convergências e divergências nas decisões dos RPPSs para manter o equilíbrio financeiro e atuarial, mostrando que, para tomada de decisões de aumento, não existe um padrão baseado em Lei, como foi visto no caso dos estados que aumentaram suas alíquotas. Alguns estados sugeriram o aumento percentual para que não houvesse desequilíbrio financeiro e atuarial. Outros estados optaram por manter a alíquota no mesmo patamar por não terem visto risco em manter o equilíbrio.
EFEITOS SOBRE O AGRONEGÓCIO:
Authors: Gomes de Melo Fabrício
Published: August 2024

O presente estudo visa analisar a comercialização de fertilizantes à luz das relações bilaterais entre Brasil e Rússia. As relações bilaterais entre Brasil e Rússia dentro do sistema internacional apresentam um conjunto de interesses em comum no âmbito econômico, político e cultural, sendo perceptível diante dos aspectos históricos entre esses atores. Com a guerra entre a Rússia e a Ucrânia, nota-se a vulnerabilidade externa brasileira, pois as sanções impostas sobre a Rússia devido ao conflito suspenderam as importações de fertilizantes ao Brasil. Sob o risco de não haver estoques de fertilizantes a longo prazo para as futuras safras, o governo brasileiro estuda diminuir sua dependência nas importações do insumo nos anos futuros.
ANÁLISE DOS IMPACTOS NA VIABILIDADE ECONÔMICA COM A VIGÊNCIA DA LEI 14.300/2022 EM PROJETOS DE GERACÃO SOLAR FOTOVOLTAICA:
Authors: Rocha Alexandro Vladno , Camboim Gabriel Chaves , Rocha Fabrícia Abrantes Figueiredo
Published: August 2024

O Brasil vem apresentando um crescimento exponencial no que diz respeito a geração solar fotovoltaica, tendo inclusive ultrapassado a energia eólica, se tornando a segunda maior fonte da nossa matriz elétrica. Isso tudo se deu, inicialmente, devido a Resolução Normativa nº 482/2012, que qualificou o consumidor brasileiro para a produção da sua própria energia. Porém, a Lei 14.300/2022 acarretou mudanças que impactam financeiramente os projetos de Micro e Minigeração Distribuída (MMGD). Assim, como a maioria desse crescimento da energia solar no país ocorreu devido a sistemas de geração residencial e comercial, este trabalho objetiva analisar o real impacto na viabilidade econômica desses projetos, promovendo um comparativo no âmbito pré e pós Lei. Para tanto, foi estabelecido como objeto de estudo a realidade de uma residência e de um comércio, ambos localizados no município de Canguaretama, no Rio Grande do Norte. Para viabilizar a análise foram utilizadas as ferramentas de análise econômica: Valor Presente Líquido (VPL); Taxa Interna de Retorno (TIR); Taxa Mínima de Atratividade (TMA); e Payback. Para os projetos foi possível verificar-se um VPL positivo, porém percebeu-se um aumento no payback de 6 meses na unidade residencial e de 7 meses na unidade comercial, oriundo da diminuição no VPL de R$7.144,53 e de R$53.557,46, respectivamente. Nas duas situações se observou uma TIR maior do que a TMA definida, tanto no âmbito pré como pós lei.
Unraveling fruit and seed morphology and seedling establishment of a narrow endemic tree species
Authors: Sühs Rafael B. , Casali Sofía , Novaes Sophia K. , Silveira Jonata , Giehl Eduardo L.H.
Published: August 2024

Abstract Montane ecosystems in South America harbor high levels of endemism typically with species that are often threatened. Here we investigated fruit and seed morphology, germination, and early growth parameters of Crinodendron brasiliense, an endangered and narrow endemic tree species of subtropical montane cloud forests in Southern Brazil. We obtained fruit and seed size and shape, number of lobes and number of seeds per fruit and evaluated germination and early growth parameters in a greenhouse. We tested the effect of different container types and parent plant on seed morphology, germination, and early growth. We also tested whether thermal scarification would improve germination rates. We showed that parent plant significantly influenced fruit and seed morphology as well as early growth rates. The germination rate of the species was extremely low (0.003–0.004%), which may be one important underlying cause of its small population size and restricted distribution. Thermal scarification was ineffective to improve the germination of seeds. Unexpectedly, container type significantly affected germination success, as seeds in trays germinated faster and in higher rates than seeds planted in seedbeds. Such result suggests a higher soil moisture could improve germination success. Our study is the first documented propagation of the species and provides essential aspects on the reproductive biology and early development of Crinodendron brasiliense. We highlight the urgent need for further research and collaborative conservation initiatives to prevent the extinction of this species.
Improving understanding of the plastochron of determinate and indeterminate soybean cultivars
Authors: Porta Felipe S. D. , Streck Nereu A. , Alberto Cleber M. , Silva Michel R. da , Tura Enrico F. , Uliana Gilnei F. , Tagliapietra Eduardo L. , Alves Alexandre F. , Winck José E. M. , Soares Maurício F. , Zanon Alencar J.
Published: August 2024

ABSTRACT The aim of this study was to identify plastochron phases in soybean cultivars with determinate and indeterminate growth habits. Experiments were conducted from 2010/2011 to 2022/2023 at four locations in Rio Grande do Sul state (RS), Brazil, using 25 soybean cultivars with determinate (6) and indeterminate (19) growth habits. This study divided the plastochron into phases during the soybean node emission stage. In irrigated cultivars with a determinate growth habit, the plastochron has an early and late phase of 59.7 and 65.7 °C day node-1, respectively. In rainfed (non-irrigated) environments, there is no difference between the early and late plastochron phases. The early and late plastochrons of irrigated cultivars with an indeterminate growth habit are 64.1 °C day node-1, while the intermediate phase is 58.5 °C day node-1. In rainfed environments, the average value of the early and intermediate phases is 60.6 °C day node-1, with a late plastochron of 79.4 °C day node-1. Dividing the plastochron into phases during node emission, as proposed in this study, improves understanding of vegetative development in soybean cultivars with determinate and indeterminate growth habits and establishes ecophysiological foundations for chronological function construction.
Informativity, information status and the accessibility of indefinite noun phrases
Authors: von Heusinger Klaus , Weeber Frederike , Hoek Jet , Brocher Andreas
Published: August 2024

In discourse processing, speakers collaborate toward a shared mental model by introducing discourse referents and picking them up with the adequate linguistic forms. Discourse referents compete with each other with respect to their prominence and their accessibility for pronouns. This study focuses on transitive sentences with proper names as subjects and indefinite noun phrases as second arguments, typically direct objects. An ambiguous pronoun in the subsequent sentence may access either referent of the first sentence. Various factors have been shown to influence pronoun resolution, including informativity (how informative is the phrase in which the referent is introduced? E.g., the waiter vs. the waiter at the entrance) and information status (is the referent given or new in the context?). While both factors have been independently shown to increase referent accessibility, our visual-world eye-tracking experiment shows an original and quite unexpected effect: informativity and information status interact when it comes to the accessibility of indefinite noun phrases: a higher degree of informativity increases accessibility when a referent is brand-new, but surprisingly decreases accessibility when a referent is inferred. We discuss a potential explanation for this surprising pattern in terms of a mismatch between the denotational type of the indefinite and the type required by the modification. We conclude that indefinites strongly interact with additional semantic, contextual and communicative parameters in establishing their referents.
Reliability analysis of open-pit power supply system components
Authors: Klyuev R. V.
Published: August 2024

In the field of designing power supply systems of open pits an important role is attributed to the problems of components reliability analysis, which can be solved by integrated application of different analysis methods for individual types of electrical equipment and network devices in power supply systems. The purpose of the work is to establish optimal parameters for an open-pit mine power supply at mining and processing complexes, and to conduct research that allows a technical and economic model of the system to be created. It has been established that mathematical statistics provides a number of methods for establishing the homogeneity (or heterogeneity) of the population of random variable values. When analyzing the data of failure statistics of electrical equipment, the method of comparative estimate of two sample averages (compared to the method of comparing the empirical distribution with the normal distribution or the moving average method) is the most acceptable. The paper presents accident rates of electrical equipment of open-pit substations and network devices of the quarry processed on the basis of data, also presents the relationship between the reliability of the circuit and its elements and shows the influence of protection reliability on the reliability of the circuit. Methods of optimizing open-pit power supply systems are presented, which consist in the use of first-order gradient methods, second-order methods or the so-called quadratic optimization methods, and random search methods. A group of gradient methods is the most widespread for solving nonlinear programming problems, among which the method of steepest descent should be considered primarily. The combination of random search with the penalty function method makes it possible to determine conditional extrema for the problem of optimizing the electrical grid and system operation mode. The method of random descent, which consists in determining the minimum of the target function according to an appropriate algorithm, is also considered, in which the direction of motion is generally given by a random vector uniformly distributed over a hyposphere.
SYNTHESIS OF A HELICOPTER ENGINE CONTROL ALGORITHM UNDER CONDITIONS OF STRUCTURAL AND PARAMETRIC UNCERTAINTY
Authors: Zaitseva Alina A. ,   Branch of the Federal State Budgetary Educational Institution of Higher Education «Ufa University of Science and Technology» in Kumertau, Belyavtsev Matvey V. , Zaitsev Evgeny A. , Kilmakov Dmitriy K. , Kultaev Dim R. , Sayfutdinova Zaliya R. ,   Branch of the Federal State Budgetary Educational Institution of Higher Education «Ufa University of Science and Technology» in Kumertau,   Branch of the Federal State Budgetary Educational Institution of Higher Education «Ufa University of Science and Technology» in Kumertau,   Branch of the Federal State Budgetary Educational Institution of Higher Education «Ufa University of Science and Technology» in Kumertau,   Branch of the Federal State Budgetary Educational Institution of Higher Education «Ufa University of Science and Technology» in Kumertau,   Branch of the Federal State Budgetary Educational Institution of Higher Education «Ufa University of Science and Technology» in Kumertau
Published: August 2024

Relevance The problem of synthesizing an algorithm for controlling helicopter engines under conditions of structural and parametric uncertainty arising during the transition to manual control mode and subsequent return to the initial automatic mode is considered. The relevance of this study lies in the development of a method for synthesizing a multimode control system for each of the helicopter powerplant engines based on the principle of fuzzy stabilization under conditions of structural and parametric uncertainty, which ensures the desired behavior of the entire ensemble of controlled variables when switching to manual control mode followed by a return to the initial automatic mode. Aim of research Aim of research is to increase the efficiency of the helicopter power plant control system by coordinating the engine operating modes while maintaining the required values of the main gas dynamic parameters within the specified limits. The objective of the study is to develop a method for synthesizing an algorithm for controlling helicopter engines based on the principle of fuzzy stabilization in conditions of structural and parametric uncertainty that occurs when switching to manual control mode with subsequent return to the initial automatic mode. Research method The objective was solved using methods of system analysis, theory of automatic control systems, linear algebra, functional analysis, fuzzy sets, computer modeling. Results A method has been developed for synthesizing a multi-mode control system for each of the helicopter powerplant engines based on the principle of fuzzy stabilization under conditions of structural and parametric uncertainty, providing the desired behavior of the entire ensemble of controlled variables when switching to manual control mode followed by a return to the initial automatic mode.
METROLOGICAL ANALYSIS OF A SYSTEM FOR MEASURING THE DENSITY OF FLAMMABLE LIQUIDS USING A FIBER-OPTIC TRANSDUCER
Authors: Gashenko Yuliya V. ,   Samara State Technical University
Published: August 2024

Relevance Density is the one of the universal indicators of the oil and petroleum products quality. In the moment, widely used measuring devices provide discrete measurement of density in laboratories, which does not allow providing real-time monitoring of the parameter and requires constant sampling. Most of all it is also complicated by high-temperature conditions of technological processes, aggressiveness, and fire hazard of the working substance. That is why there is a need to develop methods for continuously measuring and monitoring the density of liquids, eliminating the above disadvantages. However, discovered sensors and systems for measuring the density of petroleum products require additional systems and protection circuits in the product design against accidental sparks do not always have an accuracy that meets the requirements of technological processes, are labor-intensive to manufacture and use, and have a high cost of components. The task is to create systems for measuring liquid density that eliminate the shortcomings of existing means of measuring liquid density, the solution of which is possible using fiber-optic technologies to convert various physical quantities. Aim of research The article is devoted to the results of a metrological analysis of the measuring channel of a fiber-optic density transducer of liquids on a float density sensor as part of a fiber-optic measuring system for the density of liquid flammable liquids, as well as an analysis of the obtained experimental data of the developed device. Research methods Among the research methods in the article we can highlight: modeling (construction of structural and metrological models of the measuring transducer), experiment (experimental studies of the measuring system in various liquid media at different temperatures of the working environment and comparison with standard hydrometers), measurement (obtaining the measurement result on the display sensor or personal computer after calculating the required density of the liquid medium depending on the float movement using the developed program code). The results of experimental studies were processed using the Microsoft Office Excel. The conversion of the measured value of the float movement was carried out using program code written in C in the IAR Embedded Workbench software development environment. Results The sensor and the fiber-optic density converter are presented. A metrological analysis of a fiber-optic system for measuring the density of flammable liquids was carried out, and a structural metrological model of the measuring channel was built. The factors that have the greatest impact on the accuracy of the device are found, and ways to minimize them are also given. The results of experimental studies of the measuring system are presented, confirming its compliance with the required accuracy.
(Re)appraising the role of civil society in the IGAD-led peace process for South Sudan
Authors: Magara Ibrahim , Rivers Miranda
Published: August 2024

This article (re)appraises the role of civil society in South Sudan’s peace process. Situated at the confluence of civil society inclusion/exclusion, the significance of civil society participation and its contribution to peace processes, the article contributes to literature on inclusive and sustainable peace. The article employs a qualitative case analysis to illuminate the dynamics of civil society participation in the Intergovernmental Authority on Development (IGAD)-led peace process for South Sudan. The article engages with factors that compromise the efficacy of civic action in South Sudan and issues that are injurious to the sector’s legitimacy. The article neither downplays the complexity and precarity of the environment in which the South Sudanese civil society finds itself nor overplays the importance and contributions of civil society to the peace process. More importantly, it reveals that civil society in South Sudan is severely fragmentated and suggests that this fragmentation needs to be addressed as it simultaneously compromises civil society’s peacemaking efficacy and undermines the sector’s legitimacy. In the end, the article adds to the view that civil society is not always a force for peace and the sector’s inclusion; participation does not necessarily contribute to legitimising or sustaining peace processes and their outcomes.
Low Financing Trade Credit Inventory for High Deterioration under Time Dependent Holding Cost
Authors: Das Subhash Chandra ,   Department of Mathematics, Chandrapur College, Chandrapur, 713145, West Bengal, India
Published: August 2024

Objective: Rented house owners are take policy ensure their rent for a certain period for contract of rent. Due to pandemic situation, people have of less capital and are not possible to take high decision in business. Also, many of the food products are stored in high preservation, however when a food product collected out from preservative condition high rate of deterioration are seen among foods. Method: Lower capital feature of society force to consider an inventory system for three-parameter Weibull distributed deterioration, lees capital and borrowing of item from a greater business organization. Also, for security period of rent, new type of holding is considered in the proposed inventory model. Due to consideration of three-parameter Weibull distribution deterioration objective functions are highly nonlinear and to solve the optimization problems three types of quantum behaved particle swarm optimization technique applied. Findings: Gaussian behaved particle swarm optimization (GQPSO) technique gives better optimum than other techniques. A sensitivity analyses about some inventory parameters are shown in figures and fruitful managerial insight features are given for the model. Man power management in a business and duration of business period effects directly to profit. Novelty: Holding cost is constant for a period of time then linearly time dependent. This type of holding cost is a new concept in the literature. Discount on selling price is considered when items are started to deteriorated. Also, purchase cost paid at the end of business period and free from any interest charge. Keywords: Non­Instantaneous Deterioration, Stock Level, Trade Credit, Time­Varying Holding Cost, Low Finance, Weibull Distribution
Tree Domination Number of Semi Total Point Graphs
Authors: Revathi R ,   Research Scholar, School of Mathematics, Madurai Kamaraj University, Madurai, 625021, Tamil Nadu, India, Vidhya P
Published: August 2024

Objectives: The main aim of the research work is to study the concept of a tree domination number of semi-total point graphs. Method: A set D of a graph G = (V, E) is a dominating set, if every vertex in V- D is adjacent to at least one vertex in D. The domination number is the minimum cardinality of a dominating set D. A dominating set D is called a tree dominating set, if the induced subgraph is a tree. The minimum cardinality of a tree dominating set is called the tree-domination number of G and is denoted by . For any graph G = (V, E), the semi-total point graph T2(G) = H is the graph whose vertex set is the union of vertices and edges in which two vertices are adjacent if and only if they are adjacent vertices of G or one is a vertex and other is an edge of G incident with it. Findings: The characterizations of tree dominating set in semi total point graph sets to be minimal are found. To obtain the exact values, lower and upper bounds of tree dominating set in semi total point graph in some standard graphs. Novelty: This study provides bounds and results concerning the tree domination number of the semi-total point graph. This implies that the study likely presents new findings or insights into the behavior of these graphs. Keywords: Dominating set, Domination number, Tree dominating set, Tree domination number, Semi total point graph
Online Purchase Intention and E-Cart Abandonment among Small Town Consumers: Some Qualitative Insights
Authors: Thakur Preeti ,   Assistant Professor, Department of Management Studies, Vignan’s Foundation for Science, Technology and Research (Deemed to be University), Andhra Pradesh, India, Sankala Suneel
Published: August 2024

Objectives: The objective of study is to explore the factors/reasons/ for e cart abandonment that is typical to Indian small town consumers. Methods: Qualitative research has been carried out and semi-structured depth interviews were conducted for data collection as it is the most commonly used and most recommended method for data collection. Each respondent completed one interview and an average duration of the interviews conducted was about 30-40 minutes. The grounded theory approach has been used for analysis and a conceptual framework has been developed. Findings: The findings from this study revealed that online purchase intention is not only effected by Consumers’ perception, past shopping experience, extra cost, longer checkout time, website design, web characteristics and is rather influenced by a much more advanced factors such as- discount coupons, unexpected shipping cost, availability of express shipping, availability of payment options etc. The study identified 5 major antecedents to online shopping intention and leading to e-cart abandonment specific to small town consumers. This study holds meaningful insights for online marketers and e-commerce business strategist. The study also suggests few remarketing strategies to deal with consumers from small town abandoning the cart. Practical Implications: This paper holds meaningful insights for online marketers and e-commerce business strategist. For the marketers these results clarify that small town cities can no longer be overlooked as significant markets. Thus, there is a clear need to design the market offering based on their psychological makeup rather than extend what was primarily designed for the sophisticated urban markets. Novelty: Despite the fact that small towns in India has a good growth potential for online marketers, theories and practices have been under researched in this context.This research paper is the first one that investigated online shopping intention and e-cart abandonment among Indian small town consumers. Keywords: e­Cart Abandonment, Qualitative Research, Grounded Theory, Small Town Consumers, Online Purchase Intention
Estimation of Spatial and Temporal Changes in the Net Primary Productivity of an Open Cast Mine in Dongri Buzurg, Maharashtra Utilizing Satellite-based CASA Model
Authors: Shome Sanniv Dipankar , Chakraborty Surajit , Dhar Rohit Basu , Pathak Khanindra
Published: August 2024

Open cast mining activities contributes to rapid change in vegetation dynamics and severe damage to ecological environment. Landuse and landcover (LULC) change in the opencast mining area can have significant impact on regional ecosystems and carbon cycle. In this study, LULC change dynamics is studied over an opencast Dongri Buzurg manganese mine in Maharashtra for the period 2014 to 2022. The area has experienced significant changes in LULC, making it critical to evaluate the environmental effect and suggest strategies for lowering its impact on net primary production (NPP). NPP was measured using remote sensing data from two satellite platforms (Sentinel 2A and MODIS) for the period 2014 to 2022. Simulated model such as the climate productivity model (Thornthwaite Memorial) was used to correlate satellite-derived NPP data. The spatial and temporal changes in NPP with respect to LULC were analyzed. Out of the total 78 km2 of area, 8.33 km2 of land has been converted which resulted in net reduction of NPP from 5.71 gC/m2/day (2014) to 4.45 gC/m2/day (2022) (H” 3.34 gG of net carbon lost into the atmosphere over a span of 8 years). The transformation of forest area to degraded land was the most significant contributor to NPP decline, accounting for 40.55% of overall NPP reduction. Based on the measured NPP results, a correlation analysis was performed with simulated NPP derived from the climate productivity model to understand the effectiveness of remote sensing data in NPP retrieval. Both S2A and MODIS data showed good agreement with that of the climate productivity model (R2 = 0.580 and 0.689 for MODIS derived NPP for the year 2014; R2 = 0.655 for Sentinel 2A derived NPP for the year 2022). These findings may serve as a guide for scientific evaluation of ecological losses due to mining and search for more effective and sustainable land reclamation techniques. Present study also demonstrates the application of finer resolution satellite data Sentinel 2A and MODIS for estimation of NPP. The findings might serve as a guide for further research into how mining affects local surroundings and for the investigation of more effective methods for land reclamation.
Prediction of Cutting Speed of Surface Miner for Coal and Limestone Production under Varied Rock Mass Conditions
Authors: Prakash Amar , Murthy Vemavarapu M.S.R.
Published: August 2024

The key function of surface miner is to mechanically excavate in-situ rock. Strength properties i.e. the resistance of the rock to break limits the cutting speed and in turn overall performance of the surface miner. Quantitative account of rock properties in relation to cutting speed of surface miner is essential for precise estimation of its net performance. A study encompassing operating parameters (cutting speed and depth of cut) of surface miner and rock/rock mass parameters were conducted in a few coal and limestone mines located in different parts of India. Intact rock and rock mass parameters were correlated with cutting speed of surface miners and also confirmed through principal component analysis. A multiple regression equation is developed based on these outcomes to predict cutting speed taking depth of cut into consideration. An empirical relation is also developed to predict the production after arriving at suitable operating conditions. An easy to use nomogram is developed for fixing the optimum cutting speed based on the studies carried out.
Intervenciones preventivas para la conducta suicida en estudiantes: revisión sistemática
Authors:   Universidad de Cartagena, Hernández Bello Ladini , De la Hoz Restrepo Fernando ,   Universidad Nacional de Colombia, Cogollo Milanés Zuleima ,   Universidad de Cartagena
Published: August 2024

Objetivo: Identificar intervenciones preventivas de la conducta suicida en estudiantes adolescentes y jóvenes, diferentes al modelo de guardianes. Metodología: Revisión sistemática con búsqueda en 11 bases de datos, sobre intervenciones preventivas de la ideación e intento de suicidio en entornos educativos. Se llevó a cabo una evaluación de calidad metodológica de los artículos y valoración de sesgos, a través de Cochrane rct risk of bias tool RoB1 para ensayos clínicos, trend para cuasiexperimentos y Ciapponi para ensayos observacionales; se efectuó una síntesis cualitativa. Resultados: De 31 636 artículos inicialmente encontrados, se incluyeron 26. Todas las intervenciones fueron educativas, de tres tipos: presenciales, virtuales y las que combinaban las dos modalidades. Estas estaban dirigidas a aumentar el conocimiento y mejorar las actitudes sobre el suicidio, y facilitar la búsqueda de ayuda; combinaban la educación teórica y práctica, y la intervención directa a sujetos con alto riesgo. Todas fueron realizadas en la escuela o universidad. Con respecto a la valoración de sesgos, solo un estudio tuvo baja calidad. Todos los estudios reportaron resultados positivos en el aumento del conocimiento sobre el suicidio, mejoramiento de las actitudes hacia los pares suicidas, reducción de la ideación e intento de suicidio, aumento de la búsqueda de ayuda y uso de los servicios de apoyo disponibles en el entorno educativo. Conclusión: Existe variedad de intervenciones para prevenir la conducta suicida, algunas basadas en modelos teóricos, otras no. Se requiere profundizar en el estudio de estos programas, para orientar su implementación en otros contextos y la toma de decisiones en salud pública.
ENTROPY METHOD AS A TOOL FOR OPTIMIZATION OF COMPLEX SYSTEMS
Authors: Symonov D. I. ,   V.M. Glushkov Institute of Cybernetics of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Published: August 2024

The article is devoted to the study of the application of the entropy method for optimization of complex systems. The author discusses the basic principles of using entropy in analysis and planning, showing how this method can increase the efficiency and stability of complex dynamic systems. The article discusses the use of mathematical models and analysis of entropy variations to assess the impact of entropy changes on the dynamics of the utility function growth in complex dynamic systems. It also discusses two approaches to system analysis — entropy minimization and ensemble method — to maximize utility and manage uncertainty in data. The article emphasizes the advantages of these methods in the context of real and incomplete data, and offers new opportunities for developing effective decision-making strategies in various fields, including the management of public projects and other complex systems.
DEVELOPMENT AND USE OF GAMIFIED LEARNING SOFTWARE
Authors: Pashko A. O. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Holubov H. Y. ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Published: August 2024

The integration of digital systems into the educational system is a relevant area of development of information and learning technologies. Studies show that digital systems have a positive impact on the learning process. Video games and gamified materials are used to better present the material of academic disciplines and are an effective means of increasing the interest of students. The paper discusses approaches to building and using educational game applications. An analysis of the possibilities of using Minecraft in the educational process is carried out. The authors developed their own application for learning elements of discrete mathematics. Gamification of the educational process can be used to simplify the learning of complex disciplines and the acquisition of new knowledge.
Functional and aesthetic outcome of different technique for lip reconstruction after ablative surgery of lip carcinoma at a comprehensive cancer care center in Nepal
Authors: Sah Bajarang Prasad
Published: August 2024

When treating carcinoma of the lip, surgical excision often becomes necessary to remove cancerous tissue, which subsequently requires reconstructive surgery to restore both functional integrities, like speech and swallowing, and aesthetic desirability as the lip is a prominent facial feature. Different flap techniques are employed depending on the size, location, and extent of the resection.

To evaluate the functional & aesthetic outcome of different techniques used in lip reconstruction after lip cancer ablative surgery.

A retrospective review of all patients undergoing lip reconstruction using various techniques after lip cancer ablative surgery between 2021 and 2023 were conducted at a tertiary cancer hospital. Descriptive analysis was done.

Out of 17 patients, 12 were men and five were women. The mean age was 52.23 years. Out of 17 patients, primary closure using W-plasty and V-plasty technique was used in four patients, lip & commissure by Zisser Flap in one patient, lip advancement and Karapandzic flap in three patients, Bilateral Webster Bernard Flap in one patient, nasolabial flap in patients, Bilobed Pectoralis Major Myocutaneous Flap in one patient, free radial artery forearm flap with palmaris tendon in two patients, Free Anterolateral thigh Flap in two patients and lip & mandibular reconstruction with Free Fibula Osteocutaneous flap in one patient. Oral competence was present in 15 cases and only two patients having minimal incompetence those reconstructed with anterolateral and Radial artery forearm free Flap. Aesthetic outcome was excellent in seven cases, good in six cases and satisfactory in four cases. In one case, minor wound dehiscence was present that healed spontaneously and one had seroma that resolved with serial needle aspiration. Minor grade microstoma was observed in four cases and speech problem in three cases which was minimal in severity.

Successful reconstruction of all type of lip defects can be attained, if as many reconstructive procedures as possible have been mastered, and an appropriate technique is used according to the lip defect.
ATMOSFERA Y OCEANO EN EQUILIBRIO RADIATIVO
Authors: Pelkowski Joaquín
Published: August 2024

Se describe una extensión de un modelo clásico de la teoría de capas planetarias en equilibrio radiativo. El tratamiento se hace de acuerdo con el conocido esquema de Eddington. La extensión consiste en incorporar los efectos de la reflexión (isotrópicamente difusa) de la energía solar en la superficie que separa la atmósfera de un planeta y su capa superficial. El modelo, en cuyo diseño también se tiene en cuenta la absorción de radiación de onda corta, comprende los modelos de la misma clase hasta ahora elaborados. A título de ilustración, el modelo es aplicado a la atmósfera terrestre y al océano, para los cuales se calculan posibles perfiles de temperatura.
EL ENVIO DE PRECIOSIDADES DE AMERICA A ESPAÑA EN EL SIGLO XVIII
Authors: Mantilla R. Luis Carlos , O.F.M.
Published: August 2024

A través de citas documentales se comenta el envío a la Corte española, desde las colonias américanas, de objetos diversos, algunos de ellos un tanto exóticos y curiosos.
FIRST OSTEOLOGICAL RECORD OF THE DWARF SPERM WHALE IN COLOMBIA, WITH NOTES ON THE ZOOGEOGRAPHY OF KOGIA IN SOUTHAMERICA
Authors: Muñoz-Hincapié Milton F. , Mora-Pinto Diana M. , Palacios Daniel M. , Secchi Eduardo R. , Mignucci-Giannoni Antonio A.
Published: August 2024

The dwarf and pygmy spenn whale (Kogia spp.) are known to occur in pelagic waters of all tropical and temperate oceans, but their record in South America is fragmentary. We reviewed the literature for records of both species in South America as part of documenting the first osteological record of the dwarf spenn whale (K. simus) in Colombia. The new Colombian specimen is only the sixth recorded so far frorn the Pacific coast of mainland South Arnerica, and the first osteological voucher of the species for Colombia. The biologica\ information of the two species in South America has increased in recent years as a result of increased presence of researchers in the region. A total of 21 records of K. breviceps. 23 of K. simus and 5 of Kogia sp. were studied, to analyze the species' zoogeography. Both whale species were found in most coastal nations of the Caribbean, Atlantic and Pacific, but appear to be rare in Uruguay, Argentina and Chile. No records exist for Venezuela, Trinidad, Guyana, Suriname. and French Guiana. Most of the records were in waters north of the Tropic of Capricom (23.5°S); differences in tropical distribution observed when comparing the latitudes of records from the east coast with the west coast are probably related to the prevailing currents and wáter masses. The distribution of both species of Kogia appears to be tied to the wanner water masses. and characterized as tropical pelagic, ranging as far south as 15ºS on the Pacific coast and 33°S on the Atlantic coast.
RECONSTRUCCION INVITRO DE EPITELIO CORNEAL EN MATRICES DE COLAGENO
Authors: Avila Castañeda Marcel Yecid , Ramiro Barrero Jorge , Romero de Pérez Gloria , Iglesias Antonio
Published: August 2024

Las células epiteliales corneales humanas del limbo se cultivaron en lentes de colágeno. Las propiedades del epitelio reconstituído se examinaron mediante microscopía óptica y microscopía electrónica de trasmisión. Después de tres semanas de cultivo, las células presentaron uniones desmosómicas, uniones ocludens, microvellosidades en la superficie externa y formación de una membrana basal focal. Estos hallazgos son similares a los que se encuentran en la córnea normal, lo que sugiere que las células epiteliales cultivadas en matrices de colágeno podrían ser útiles para realizar trasplantes de epitelio cornea!.
DINÁMICA POBLACIONAL Y PESQUERÍA DE LA LISA, MUGIL INCILIS, EN LA CIÉNAGA GRANDE DE SANTA MARTA, CARIBE COLOMBIANO
Authors: Sánchez Ramírez Claudia , Rueda Mario , Santos-Martínez Adriana
Published: August 2024

Debido a la importancia comercial de la lisa Mugil incilis en la pesquería artesanal de la Ciénaga Grande de Santa Marta se realizó este trabajo, el cual a partir de información de estadísticas y prospecciones pesqueras, analiza aspectos reproductivos, crecimiento, mortalidad, patrón de reclutamiento, rendimiento por recluta y biomasa. Se estableció que este recurso está sobrcxplotado en la zona y que es necesario tomar medidas de manejo como la disminución del esfuerzo pesquero y aumento de la talla media de captura que permitan garantizar un aprovechamiento sostenible de la pesquería.
THE DINOFLAGELLATES OF THE GENERA CERATIUM AND ORNITHOCERCUS COLLECTED IN THE GOLFO DE SALAMANCA, COLOMBIAN CARIBBEAN SEA
Authors: Fernández M. Carlos E. , B. García Camilo
Published: August 2024

A morphological study was done of the Dinoflagellates belonging to the genera Ceratium and Ornithocercus found on the samples collected in 1996 the Gulf of Salamanca, Colombian Caribbean Sea. A total of 30 species and three morphotypes of the first genus, and three species of the second one, are described complementarily .
NEW FROGS OF THE GENUS ELEUTHERODACTYLUS FROM THE EASTERN FLANK OF THE NORTHERN CORDILLERA CENTRAL OF COLOMBIA
Authors: Lynch John D. , Rueda-Almonacid José Vicente
Published: August 2024

Four additional species of Eleutherodactylus are described from the andean forests between 1800 and 2650 meters elevation in the municipios of Pensilvania and Samaná, Departamento de Caldas, on the eastem flanks ofthe Cordillera Central. Additionally, E. boulengeri is reported for the first time from the region. With these reports, 23 species of Eleutherodactylus are recorded from this small area. The most detailed field work was carried out in forest patches 6 km SW Florencia, Caldas, where 17 species of the genus were found sympatrically.
POSIBILIDADES DE UN CONTROL BOTÁNICO ANALÍTICO DE LA UÑA DE GATO UNCARIA TOMENTOSA (WILLD.) DC.
Authors: C. Peña Raúl , T. Timmermann Barbara , Iturriaga Liliana , González Luis , Montenegro Gloria
Published: August 2024

Uncaria es un género que consta de 34 especies, distribuidas en África, América y Asia. Sólo algunas especies tienen interés etnobotánico y sólo una ha llegado a la farmacopea U. gambir (Hunter)Roxb. que da un tanino conocido como gambir o pale catechu, y que contiene ( + )-catequina. Una especie de Uncaria probablemente U. guianensis (Aubl.)Gmel. es empleada por los indios Campa en el Perú contra tumores. De igual modo se ha informado recientemente que la "uña de gato" a base de la corteza de U. tomentosa tiene un uso afín, y que además se emplea en úlceras y diversas inflamaciones. Uncaria tomentosa (Willd.)DC. es la otra especie americana que posee mucha similitud en la composición de alcaloides, que se discuten.
LOS RENACUAJOS COLOMBIANOS DE SPHAENORHYNCHUS (HYLIDAE): DESCRIPCIONES, ANOTACIONES SISTEMÁTICAS Y ECOLÓGICAS
Authors: Suárez-Mayorga Ángela M. , Lynch John D.
Published: August 2024

En los alrededores de Leticia, Sphaenorhynchus carneus, S. dorisae y S. lacteus coexisten en pantanos de bosque, tanto en tierra firme como en várzea, y forman parte de comunidades complejas compuestas por cerca de diez especies. Sus larvas son nectónicas y se encuentran asociadas a vegetación flotante; se caracterizan por poseer grandes papilas dispuestas en varias hileras (a excepción de S. dorisae) y un tubo anal medial, además de una llamativa coloración verde con tonos rojizos en vida. Sphaenorhynchus dorisae presenta una estructura bucal externamente similar al llamado "brazo labial" de Scarthyla goinorum o de los Scinax del grupo rostrata. Sphaenorhynchus carneus posee una hilera anterior de dentículos, a diferencia de las otras especies que poseen dos. Se proporcionan datos novedosos sobre la biología de estas especies.
LA CORTEZA DE QUILLAY (QUILLAJA SAPONARIA MOL.), UN RECURSO DE LA FARMACOPEA INTERNACIONAL
Authors: Montenegro Gloria , C. Peña Raúl , Timmermann Bárbara N.
Published: August 2024

La corteza de quillay es un recurso de la farmacopea internacional. Se entregan los antecedentes farmacognósticos para una caracterización de la droga que se obtiene de Quillaja saponaria Mol.
ACALYPHA INFESTA POEPP. (EUPHORBIACEAE), NOVEDAD PARA LA FLORA DE COLOMBIA
Authors: Cardiel José María
Published: August 2024

Se registra una nueva especie de Acalypha L. para la flora de Colombia, A. infesta Poepp., conocida hasta ahora solo de Perú y Ecuador. Se comentan las principales diferencias con las especies afines y se incluye también una clave de identificació
UN NUEVO MODELO ESTRATÉGICO Y OTRAS PERSPECTIVAS SOBRE EL MANEJO DE RECURSOS BIÓTICOS TROPICALES EN ZONAS DE CONSERVACIÓN Y DESARROLLO INTEGRAL
Authors: Pipoly III John James
Published: August 2024

Se presenta un nuevo modelo estratégico para manejar recursos bióticos en zonas de conservación y desarrollo integral. El modelo pretende proveer una metodología para analizar la presencia de recursos bióticos y la relación fenológica de los productos, y, por consiguiente, su flujo de caja. Este análisis ofrece a las autoridades de la comunidad que manejan la zona la oportunidad de agregar cuidadosamente otras microempresas. El seguimiento constante de la extracción y el flujo resultante permite el manejo por adaptación. Aunque el modelo no pretende involucrarse en el cálculo prospectivo de bienes a largo plazo, se provee un guion para medir el levantamiento del programa y el seguimiento del desarrollo.