bluuebunny/crossref_metadata_2025 huggingface dataset:
Fertilitas dan Daya Tetas Telur Ayam Kampung Hasil Inseminasi Buatan Menggunakan Konsentrasi Larutan NaCl Fisiologis Berbeda
Authors: Sulfiana Sulfiana , Sandiah Natsir , Indi Amiluddin
Published: July 2023

Penelitian ini bertujuan untuk mengevaluasi tingkat fertilitas dan daya tetas telur ayam kampung hasil inseminasi buatan menggunakan konsentrasi larutan NaCl fisiologis berbeda. Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 4 ulangan, sehingga terdapat 20unit percobaan. Perlakuan yang digunakan pada penelitian ini adalah P0 = perlakuan tanpa pengencer, P1 = 1:2 ml larutan NaCl fisiologis, P2 = 1:2,5 ml larutan NaCl fisiologis, P3 = 1:3 ml larutan NaCl fisiologis, P4 = 1:3,5 ml larutan NaCl fisiologis. Parameter yang diamati adalah fertilitas, daya tetas dan daya hidup embrio. Hasil penelitian menunjukkan bahwa inseminasi buatan menggunakan konsentrasi larutan NaCl fisiologis berbeda berpengaruh nyata (P
Pengaruh Lokasi Otot Terhadap Kualitas Organoleptik Dendeng Giling Daging Sapi
Authors: Rahayu Novi , Hafid Harapin , Fitrianingsih Fitrianingsih
Published: July 2023

Penelitian ini bertujuan untuk mengevaluasi pengaruh lokasi otot terhadap kualitas fisik dan organoleptik dendeng giling daging sapi. Rancangan penelitian ini adalah menggunakan rancangan acak lengkap (RAL) yang terdiri dari 4 perlakuan dan 4 ulangan dan 15 panelis pada uji organoleptik. Perlakuan yang digunakan adalah daging dengan bagian paha (P1), daging dengan bagian leher (P2), daging dengan bagian betis (P3), daging dengan bagian punggung (P4). Variabel yang diukur dalam penelitian ini adalah kualitas fisik yaitu randemen, daya ikat air, derajat keasaman (pH) dan susut masak serta kualitas organoleptik yaitu warna, aroma, rasa, keempukkan, tekstur, dan penerimaan umum. Hasil penelitian menunjukan bahwa kualiatas fisik dendeng giling daging sapi berpengaruh nyata terhadap nilai pH dan susut masak namun tidak berpengaruh nyata terhadap daya ikat air, dan rendemen. Sedangkan pada mutu organoleptik, dendeng giling daging sapi berpengaruh nyata terhadap aroma. Namun tidak berpengaruh nyata terhadap warna, rasa, keempukan, tekstur dan penerimaan umum. Dapat disimpulkan bahwa daging bagian punggung menghasilkan kualitas terbaik dalam pembuatan dendeng giling daging sapi.

Kata Kunci: Dendeng giling, daging paha, betis, leher punggung, kualitas fisik, kualitas organoleptic
Antimicrobial activity of amaranthus caudatus extract against multidrug resistant acinetobacter baumannii and klebsiella pneumoniae
Authors: Bari Md.N. , Alfaki M.A.
Published: July 2023

Nowadays, new and effective antifungal or antimicrobial medications are required due to the rise of drug-resistant organisms. Most people have thought about using medicinal herbs to naturally treat illnesses with bacterial origins. In this study, two multidrug resistant (MDR) bacteria were used as in vitro models to compare the effects of antimicrobial medicinal plant extracts. The antibacterial effects of a Amaranthus caudatus seed extract was elicited by different solvents on Acinetobacter baumannii and Klebsiella pneumoniae were examined in this experimental study using the disc diffusion assay and the minimum inhibitory concentration (MIC) method. GC-MS analysis identified several antibacterial compounds, viz. hexadecane, dodecane, undecane, heptacosane, etc. The extracts’ effectiveness was examined through their anti-bacterial and anti-oxidant activity. Plant extracts with various compounds demonstrated antibacterial activity in the current study. They can therefore serve as a new source of antibacterial compounds.
Análise da aplicação de metodologias ativas em disciplina de Lógica de Programação
Authors: Alves Havana Diogo
Published: July 2023

Este artigo traz a análise da adoção de metodologias ativas como estratégia de ensino-aprendizagem em disciplina de Lógica de Programação, visando melhorar indicadores de reprovação e evasão desta matéria. Apresentamos o cenário anterior e o posterior a aplicação das metodologias Aprendizado Baseado em Problemas, Aprendizado Baseado em Times e Sala de Aula Invertida. Como resultado, após seis semestres de utilização destas metodologias ativas, o resultado foi satisfatório, diminuindo o índice de reprovações por falta e por nota.
Exploração e Visualização de Padrões Criminais
Authors: Silva Girleide , Silva Priscylla , Silva Leonardo B. M.
Published: July 2023

A criminalidade é um dos problemas que mais afetam a nossa sociedade. Nos últimos anos, técnicas de ciência de dados têm sido utilizadas para ajudar a mitigar esse problema. Já é conhecido na literatura sobre o tema, que os crimes apresentam um padrão temporal e espacial nas cidades. Entretanto, a maioria dos trabalhos estão concentrados na análise de dados de uma única cidade. Este trabalho apresenta uma investigação baseada em análise visual para comparar padrões criminais em duas cidades, Chicago e São Francisco. Os resultados encontrados mostram que seus padrões criminais são distintos.
Utilizando Question Answering no Auxílio ao Processo de Ensino e Aprendizagem de Programação: Um Estudo de Caso com BERT e ChatGPT
Authors: Freire Marcelo de L. , Feitosa Robson G. Fechine , Santos Yuri D. , Menezes Hanna , Esmeraldo Guilherme Á. R. M. , Mello Harley M. de , Bispo Jr. Esdras L. , Campos Gustavo A. L. de
Published: July 2023

Natural Language Processing is an area of Artificial Intelligence that has brought benefits to the most diverse processes of human activity. In this context, this work uses a Question Answering (QA) approach to help in the process of teaching and learning programming. For this purpose, it analyzed two case studies with different QA models and a database with 87 questions and answers related to teaching programming. Thus, the models achieved 62% and 85% accuracy in the first and second scenarios, respectively. The present work also discusses (i) some limitations of the approach, (ii) some qualitative pedagogical results, and, finally, indicates (iii) recommendations for future work.
Um estudo comparativo de características das ferramentas de automação de teste end-to-end: Cypress vs QA Wolf vs TestCafé
Authors: Figueiredo Rebeca M. de C. T. , Fernandes Raiane Eunice S. , Figueiredo Raquel M. de C. T. , Araujo Clênia Melo , Menezes Jislane S. S. de
Published: July 2023

Diante da necessidade de softwares robustos e de alta qualidade, ferramentas de teste foram criadas para ajudar a detectar falhas e atender aos requisitos exigidos. Um comparativo das características entre as ferramentas de teste End-to-End, Cypress, TestCafé e QA Wolf, analisou documentação, preparação do ambiente de teste e comparação entre suas aplicações para determinar os pontos fortes e fracos das ferramentas. Os resultados mostram que a ferramenta mais fácil de usar é o QAWolf, enquanto o TestCafe requer sólidos conhecimentos de programação e domínio de testes e, por fim, Cypress tem mais recursos, mas requer um conhecimento avançado de testes e programação.
Heuristics for Automatic Detection of Design Patterns in Object-Oriented Software
Authors: Freitas André Luis Castro de , Price Ana Maria de Alencar
Published: July 2023

Design patterns summarize the experience of expert designers. Patterns are not invented, rather they are extracted from existing systems. The extracting process of patterns had involved the observation of a number of systems designs, looking for patterns across those systems. A design pattern is a reusable implementation model or architecture that can be applied to solve a particular recurring class of problem. In general, it is hard to recognize a pattern use in real-world software systems, unless you know what you are looking for and go carefully and methodically searching for a particular pattern. This paper is about the problem of detecting the essence of design patterns. By pattern essence we mean those collaborations between classes that characterize each one of the patterns. Heuristics have been created to identify and apply design patterns to object-oriented programs. The rules are based on the structural realtionship between classes and objects. It is implemented a tool in Smalltalk that automatizes detection and identification of design patterns in object-oriented applications. The tool intendes to be a validation prototype for the buit in heuristics. The development of the examples allows patterns comparison, showing advantages and tendencies in using one or another type of collaboration between classes and objects. Patterns studies stimulate facilities during the building of object-oriented programs. The patterns also help in the definition of good designs. We understand that a good design is a software that follows the fundamental concepts of the object-oriented paradigm including those rules stated by recognized.
Especificação de um Modelo Formal para Aplicações em Sistemas Hipermídia Abertos
Authors: Miotto Aline Maria Malachini , Fortes Renata Pontin de Mattos
Published: July 2023

Uma tendência no projeto de sistemas hipermídia é o desenvolvimento de sistemas que sejam abertos, extensíveis e distribuídos entre diferentes usuários. Na última década vários sistemas hipermídia abertos foram apresentados na literatura. Nesse contexto, técnicas formais vêm se tornando uma ferramenta muito útil para especificação de aplicações hipermídia (e por conseguinte, de aplicações em sistemas hipermídia abertos) por possibilitar que determinada solução especificada seja precisa, não ambígua, independente de sua implementação e reutilizável. Além disso, modelos formais adequados podem oferecer abordagens sistemáticas e confiáveis para a análise e verificação de propriedades estruturais e dinâmicas dessas aplicações. Este projeto de mestrado tem como objetivo verificar a adequação do modelo formal XHMBS (eXtended Hypertext Model Based on Statecharts) em relação à especificação de aplicações em sistemas hipermídia abertos e, se necessário, propor extensões a esse modelo para permitir a especificação de tais aplicações.
Um sistema Multi-agente para Busca e Filtragem de Informações de Domínio na Internet
Authors: Costa Marcelo Nascimento , Werner Cláudia M. L. , Mattoso Marta L. Q.
Published: July 2023

Domain Engineering (DE) aims at providing a group of reusable components within a specific domain. Application Engineering (AE) aims at constructing applications by reusing resulting DE components. This work presents a multi-agent system, which enables intelligent information retrieval, by providing domain engineers with a broad and relevant amount of information to support them in the accomplishment of DE/AE processes. The system adopts techniques such as user modeling, machine learning, and domain ontologies. The proposed approach allows information search on several sources of heterogeneous and/or distributed data throughout the Web. One important objective is to improve the algorithms that are already used by agents, involved in machine learning and information filtering. The techniques currently adopted for user modeling are being revised and some new characteristics will be added to the user profile. Another issue considered by the approach is the documentation of reusable components. XML, a standard defined by W3C, is used for this purpose and further publication of components at the Web. XML provides more semantics to documents and helps the search for components at the Web.
Serviços para Publicação e Recuperação de Componentes de Software através da Internet em Ambientes de Reuso
Authors: Souza Robson Pinheiro de , Werner Cláudia M. L. , Mattoso Marta L. Q.
Published: July 2023

Component-based software development aims at constructing new systems from reusable components. Some studies have concluded that reuse increases both quality and productivity of software developments. Amongst the problems involved in the application of reuse techniques, two of them are treated in this work: (i) the difficulty of locating and retrieving components stored in heterogeneous repositories spread over the Internet; and (ii) the problem of publishing new components, in order to help both their integration to a reuse environment and comprehension by the developer. Aiming at supporting the solution of the two mentioned problems, this work proposes a component integration layer to a reuse infrastructure. In our research, we aim to explore and to associate the features of two different technologies: (i) the new technology of interoperability systems, in particular the LeSelect system, in order to solve the existing problems of interoperability between repositories of components; (ii) the popular technology of mediators, responsible for managing XML metadata extracted from each repository, providing transparency in the location and retrieval of components, and services for query optimization.
Utilização de Padrões de Projeto de Software na Reengenharia de Sistemas
Authors: Prieto Gustavo A. , Penteado Rosângela D.
Published: July 2023

Este trabalho visa dar continuidade à implementação do sistema StatSim (Statecharts Simulator), em linguagem orientada a objetos e com utilização de padrões de software em linguagem Java e banco de dados relacional Sybase. Dessa forma os modelos recuperados na engenharia reversa e o projeto realizado na reengenharia parcial, já efetuada, serão utilizados. A continuidade do processo de reengenharia do ambiente StatSim ocorrerá com a inclusão de uma interface gráfica para apoiar os recursos de edição e simulação de Statecharts existentes na versão anterior. Alguns padrões propostos por Gamma e Grand e o padrão de projeto Model-View-Controller serão estudados e integrados ao ambiente na medida do possível. Um experimento será conduzido para verificar a manutenibilidade das versões existentes desse ambiente.
Reengenharia Orientada a Objetos de Sistemas COBOL Utilizando Padrões de Projeto e Servlets
Authors: Camargo Valter Vieira de , Penteado Rosângela Ap. D.
Published: July 2023

A constante preocupação com a manutenibilidade de sistemas legados tem conduzido a diversas pesquisas. Tais sistemas, quando implementados em COBOL despertam especial atenção por parte dos engenheiros de software. Na maioria das vezes, esses sistemas devem passar por um processo de reengenharia em que tanto o paradigma de desenvolvimento como a linguagem de programação devem ser alterados. A engenharia reversa, primeiro passo de um processo de reengenharia, pode ser realizada com o apoio da abordagem Fusion/RE. O interesse na aplicação de resultados eficazes, comprovados por outros pesquisadores, como os Padrões de Projeto de software aparecem como candidatos à integração com o processo de reengenharia, principalmente, quando bancos de dados relacionais são utilizados para a persistência de dados e a linguagem de implementação é orientada a objetos. A vantagem da Internet é comprovada e a tendência de disponibilizar sistemas por meio dela é crescente. Assim, este trabalho tem interesse na criação e validação de um processo de reengenharia orientada a objetos para sistemas implementados em COBOL, alterando a linguagem de implementação para orientada a objetos, Java, utilizando Padrões e servlets, sem a alteração da sua funcionalidade.
Avaliação de um Sistema de Autoria de Aplicações Educacionais Hipermídia: Um Estudo de Caso
Authors: Paiva Débora Maria Barroso , Nunes Maria das Graças Volpe
Published: July 2023

O aprimoramento das técnicas e métodos sistemáticos elaborados para apoiar o desenvolvimento de aplicações trouxe como principais vantagens a produção de softwares com alta qualidade e a custos mais baixos. De forma similar ao desenvolvimento de softwares comerciais, o desenvolvimento de aplicações hipermídia tem passado por significativas mudanças e por constantes evoluções. Atualmente, os sistemas de autoria hipermídia oferecem, por exemplo, condições para que uma aplicação seja previamente especificada para, em seguida, ser efetivamente implementada. No entanto, é necessário que eles possuam algumas características que proporcionem facilidades em sua utilização, de forma a motivar seus usuários. De forma geral, este trabalho se concentra na avaliação da implementação de um conjunto de requisitos desejável em um ambiente de autoria de aplicações hipermídia para ensino, denominado SASHE (Sistema de Autoria e Suporte Hipermídia para Ensino). Os requisitos propostos nas fases iniciais do desenvolvimento desse sistema também serão considerados na avaliação, que será realizada de forma experimental e resultará na obtenção de dados concretos com relação às condições atuais da implementação do módulo de autoria do sistema mencionado.
Avaliação de hiperdocumentos a partir da classificação de links
Authors: Silva Elisandra Aparecida Alves da , Fortes Renata Pontin de Mattos
Published: July 2023

A criação de links é uma atividade essencial durante a autoria de um hiperdocumento. Os links são um diferencial importante em relação à autoria convencional de documentos e por meio deles, é possível a interação básica, conhecida como "navegação" pelo hiperdocumento com o suporte de um browser. Durante a construção de um hiperdocumento, os autores são projetistas dessa estrutura bastante flexível de links que, em geral, fica propensa a "erros" por envolver um grande número de páginas com enorme diversidade de tipos de links, e suas respectivas formas de interação. A proposta deste trabalho de mestrado é especificar uma ferramenta que possa auxiliar a avaliação de hiperdocumentos utilizando um método eficiente de classificação de links.
Maestro: Um Middleware para Suporte a Aplicações Distribuídas Baseadas em Componentes de Software
Authors: Ferreira Cláudio Luís Pereira , Becerra Jorge Luís Risco
Published: July 2023

Mudanças fundamentais estão ocorrendo na estrutura dos sistemas de informação e na aplicação da tecnologia de informação nas empresas. As constantes alterações no comportamento de mercados e a enorme competitividade entre empresas motivam a busca por sistemas distribuídos que possibilitem a criação de modelos empresariais mais abertos e dinâmicos. Neste artigo será apresentada a especificação de um middleware aberto, a qual tem por objetivo a definição de uma arquitetura para o suporte ao desenvolvimento de aplicações distribuídas que permita atender as necessidades atuais das empresas. Procurando obter um sistema modular, escalável e de fácil manutenção, a arquitetura proposta se apoia em tecnologias atuais tais como o modelo de referência ODP, Patterns de arquitetura e componentes de software, para criar um ambiente propício ao desenvolvimento de novas aplicações distribuídas que permitam também a integração de sistemas legados.
Relationship Between Coping Styles and Blood Pressure in the Staff of Covid-19 Wards of Hospitals of Kermanshah University of Medical Sciences During 2020 - 2021
Authors: Jameshorani Saeed , Kakabaraei Keivan , Afsharinia Karim , Hossaini Saeedeh
Published: July 2023

Background: With the global outbreak of Covid-19 at the beginning of 2020, the staff of hospitals involved in the care for the Covid-19 patients underwent great physical and psychological pressure. Objectives: This study was conducted to determine the correlation between coping styles and blood pressure in the staff of Covid-19 centers during 2020 - 2021. Methods: A total of 278 medical staff of Kermanshah University of Medical Sciences who were serving in the Covid-19 wards during 2020 - 2021 were recruited in this cross-sectional correlational study. The ways of coping questionnaire (Lazarus and Folkman, 1985) was used to assess the coping strategies. The blood pressure of the personnel was measured after three consecutive shifts. Data were analyzed by SPSS-20 software using descriptive and inferential statistics. Results: Among the coping styles used by the staff, the highest score (17.9 ± 4.4) was reported for planful problem-solving. The results showed a significant and positive correlation between emotion-oriented coping styles and blood pressure, while problem-oriented coping styles had a negative correlation with blood pressure. Conclusions: Emotion-oriented coping styles have a positive and significant correlation and problem-oriented coping styles have a negative and significant correlation with the increased blood pressure of employees. The relationship between coping styles in medical staff in different wards and the application of coping styles in medical assistants in different educational levels and specialties are suggested to be evaluated.
Operation of HVDC converters for transformer inrush current reduction
Authors:   , Solh Joukhah Zahra
Published: July 2023

The present PhD thesis deals with transformer inrush current in offshore grids including offshore wind farms and High Voltage Direct Current (HVDC) transmission systems. The inrush phenomenon during transformers energization or recovery after the fault clearance is one of important concerns in offshore systems which can threaten the security and reliability of the HVDC grid operation as well as the wind farms function. Hence, the behaviour of wind turbines,Voltage Source Converters (VSC) and transformer under the normal operation and the inrush transient mode is analyzed.

For inrush current reduction in the procedure of the offshore wind farms start-up and integration into the onshore AC grid, a technique based on Voltage Ramping Strategy (VRS) is proposed and its performance is compared with the operation of system without consideration of this approach. The new methodology which is simple, cost-effective ensures minimization of transformer inrush current in the offshore systems and the enhancement of power quality and the reliability of grid under the transformer energizing condition. The mentioned method can develop much lower inrush currents according to the slower voltage ramp slopes.

Concerning the recovery inrush current, the operation of the offshore grid especially transformers is analyzed under the fault and the system restoration modes.The recovery inrush transient of transformers can cause tripping the HVDC and wind farms converters as well as disturbing the HVDC power transmission. A voltage control design based on VRS is proposed in HVDC converter to recover ali the transformers in offshore grid with lower inrush currents.The control system proposed can assure the correct performance of the converters in HVDC system and in wind farm and also the robust stability of the offshore grid.

Esta tesis doctoral estudia las corrientes de energización de transformadores de parques eólicos marinos con aerogeneradores con convertidores en fuente de tensión (VSC) de plena potencia conectados a través de una conexión de Alta Tensión en Corriente Continua (HVDC). Las corrientes de energización pueden disminuir la fiabilidad de la transmisión eléctrica debido a disparos intempestivos de las protecciones durante la puesta en marcha o recuperación de una falta. Para la mitigación de las corrientes de energización durante la puesta en marcha del parque esta tesis propone una nueva estrategia basada en incrementar la tensión aplicada por el convertidor del parque eólico en forma de rampa (VRS). Este método persigue energizar el parque eólico con el menor coste y máxima fiabilidad. La tesis analiza diferentes escenarios y diferentes rampas. Otro momento en que las corrientes de energización pueden dar lugar a un disparo intempestivo de las protecciones es durante la recuperación de una falta en la red de alterna del parque eólico marino. Esta tesis extiende la estrategia VRS, utilizada durante la puesta en marcha del convertidor del parque, para los escenarios de recuperación de una falta.
Multi-objective optimization of an energy hub using artificial intelligence
Authors:   , Kampouropoulos Konstantinos
Published: July 2023

The present dissertation is focused on the energy optimization of systems which contain multiple energy carriers. The objective of the research is the development of a methodology and the corresponding software tools, which permit to calculate the optimal energy flow of a multi-carrier system in arder to satisfy its energy demands and minimiza a set of established optimization criteria. The topics that are covered in this research include the description of the mathematical formulation of a multi-carrier energy system based on the energy hub concept, the modelling and prediction algorithms that are used to forecast the energetic needs of the plant, as well as the proposed optimization methodology to obtain the system's optimal operating strategy and its complete state, including transmission and conversion of multiple energy carriers within defined security constraints.
Digital models and software-basad simulations demonstrate the feasibility of the proposed solution. The testing and validation of the proposal was made under real operating conditions of a car manufacturing plant in the framework of the FP7 European research project EuroEnergest. The findings provided valuable output conclusions of the suitability and usefulness of this methodology to calculate the optimal control of a multi-carrier energy system, as well as the potential energetic, environmental and economic benefits that could be resultad from its application.

En la presente Tesis doctoral se estudia la optimización energética en sistemas que contienen múltiples fuentes y demandas energéticas. El objetivo de la investigación es desarrollar una metodología y los correspondientes algoritmos de control, que permitan controlar la operación de sistemas con múltiples portadores energéticos de forma óptima,con fin de satisfacer sus demandas energéticas y minimizar una serie de criterios establecidos. Los temas que se tratan en esta investigación consisten en la descripción, formulación matemática y análisis de sistemas multiportadoras de energía, basándose en el concepto del Hub Energético y en algoritmos adaptativos para el modelado y predicción de las demandas energéticas de estos sistemas.Además, se desarrolla una metodología de optimización para calcular la óptima estrategia de operación de los equipos y el uso de sus energías. Los modelos digitales y las simulaciones realizadas demuestranla viabilidad de la solución. La evaluación y validación de la metodología se ha realizado bajo condiciones de operación reales en una planta de fabricación de automóviles, en el marco del proyecto de investigación Europeo FP7 EuroEnergest. Los resultados de validación presentan un gran potencial de ahorro cuando se aplica la estrategia de operación calculada por el algoritmo, mostrando beneficios energéticos, económicos y medioambientales.
Desarrollo y Validación de Modelos de Transformadores Monofásicos y Trifásicos con Saturación, para el Análisis de Armónicos en Sistemas de Potencia
Authors:   , López García Ricardo
Published: July 2023

En el trabajo de investigación desarrollado en esta Tesis se propone una modelización completa y a la vez sencilla del transformador y trifásico de tres columnas para el funcionamiento en condiciones de saturación del núcleo. La modelización propuesta en este trabajo fue inicialmente desarrollada en el programa de simulación Pspice. Las simulaciones se han validado con un amplio experimental, en el cual se describe el proceso de obtención de los parámetros mediante ensayos de laboratorio fáciles de realizar. Uno de los principales objetivos de este trabajo es, que el modelo del transformador sea adecuado para integrarse a un programa de análisis de flujos de cargas con armónicos. Para esto, se ha desarrollado un algoritmo de resolución directa del régimen permanente del sistema de ecuaciones no lineal del transformador con saturación del núcleo.
Las simulaciones del modelo desarrollado tanto en el programa de simulación Pspice como en el algoritmo de obtención del régimen permanente directo, se han validado contra las medidas de los ensayos de laboratorio. En ambos casos, las simulaciones han mostrado gran concordia con las medidas. Finalmente se hace una comparación entre los resultados de las simulaciones obtenidas con el programa de simulación y las obtenidas con el algoritmo. Los resultados son muy similares, lo cual indica que el algoritmo es adecuado.
Common-mode voltage cancellation in single- and three-phase transformer-less PV power converters
Authors:   , Vázquez Guzmán Gerardo
Published: July 2023

Electrical Energy generation is an issue that is continuously cause of concern around the world. Many efforts have been done in this sense to cover the requirements of the constantly growing in the electrical energy demand. But not only the electrical energy demand is growing but also clean electrical energy demand. In this sense, many countries are taking advantage from the renewable energy generation systems, considering mainly wind and solar energy.
Solar energy systems provide a high percentage of the total energy production, according with the latest report of the International Energy Agency (IEA) regarding Photovoltaic Power System Program (PVPS), the cumulative installed PV power at the end of 2009 it was around 20.3 GW out of which 6.188 GW were installed in 2009. From the total PV power installed in 2009, 6.113 are grid connected systems. The growing of the PV systems is due to the new technologies and developments that have permitted to reduce costs in the total design and installation of a PV source.
As the major percentage of the total PV energy installed is from grid connected systems, this thesis work deals with the analysis and proposals in the transformerless grid-connected PV systems which can provide higher efficiencies regarding PV system with transformer. In this sense, when there is not transformer between the electrical grid and the power converter, a problem regarding leakage ground currents appears, this is the main issue in this thesis work.
The main research task in this thesis work is to analyze and evaluate the operation of the different transformerless topologies presented in the bibliography and then to provide some solutions to minimize the leakage ground current phenomenon in order to comply with the standard requirements.
Aportacions a la transferència de tecnologia energètica aeroespacial: cap al vehicle verd construïble a Catalunya
Authors:   , Gallemí Rovira Oriol
Published: July 2023

El present treball, culmina un període de recerca que va començar amb l’observació i mesura dels rendiments dels primers vehicles elèctrics del mercat contemporani i de les tècniques d’optimització energètica aeroespacial.
Aquesta tesi recull i recopila les conclusions de tesis i projectes de final de carrera dirigides pel Dr. Ricard Bosch, esdevenint un graó més de la cadena cap al vehicle elèctric que ell mateix persegueix des de fa 30 anys..
L’estudi se centra al territori català per limitacions de desplaçaments i de contactes industrials, analitzant les capacitats de formació, les tècniques, les industrials tot i que els mercats potencials són mundials. Durant l’estudi, els experiments realitzats sobre propulsions elèctriques s’han realitzat en plataformes privades pel que se’n manté la confidencialitat del producte final, no necessariament terrestre.
Finalment es dibuixen les opcions que donarien continuïtat a la tesi i les oportunitats de negoci més factibles dins del territori català.

This work culminates a period of research which began with the observation and performance measurement of the first modern electric vehicles together with the aerospace energy optimization techniques.
The thesis collects and compiles the findings of theses and final projects directed by Dr. Ricard Bosch, becoming one more step in his evolution chain towards the electric vehicle.
The study focuses on the Catalan territory, due to travelling expenses and industry contacts, analyzing its skills, training, techniques, industry and the potential global markets. During the study, experiments were performed on electric propulsion platforms for private
companies so the confidentiality of the final product is kept, and are not necessarily ground vehicles.
Finally, this document outline the options that would give continuity to the thesis and the most feasible business opportunities within the Catalan territory.
Determination of the induction machine parameters from starting transient measurements
Authors:   , Kojooyan Jafari Hengameh
Published: July 2023

This Thesis study the parameters estimation of the induction machine with the single-cage and doublecage models, using the stator currents, voltages and mechanical speed from a starting transient. The dynamic equations of the induction machine are expressed in the synchronous reference frame because in this reference the values of the direct and quadrature currents have a slower variation than those in the other reference frames. This reference frame is important to facilitate the data filtering. The proposed method for the single-cage parameters estimation introduces an approximation of the rotor flux using the stator currents and voltages. It has been demonstrated in the thesis that this approximation improves the accuracy of the calculated parameters significantly. Two different methods to calculate the parameters have been developed. The first is based on the linear least-square method and the second on the resolving of a nonlinear system of equations. A detailed error study of the parameters and predicted behavior have been made in the thesis. An interesting result of the error study is that it is very important that the speed of the points be used in the calculations. It is very important to use the points with the maximum torque speed and points near the synchronous speed. The thesis presents the two first methods developed for parameters estimation of the induction machine with double-cage model using data from a starting transient. The other methods known in the literature use steady state data. Both methods use data from the point of maximum torque to the synchronous speed to calculate the parameters of a single-cage model, because the torque- and current-speed curves of this single-cage fit very well with the torque- and current-speed curves of the double-cage. Later, the first method uses a point with a speed near to zero speed and a point in the synchronous speed and other single-cage is calculated. With these two singlecages the impedances of three points are calculated and they are used to estimate the six parameters of the double-cage model solving a nonlinear system of equations. The second method, called instantaneous power method, uses the fact that the averaged transient torque has similar values to the steady-state torque in the mechanical transient region. Then, several impedance values are calculated for points with different speeds in this region, where the effects of the double-cage are more important. Finally, with impedance values in the synchronous speed and the maximum torque speed obtained with the regression method and
impedance values obtained with the instantaneous power method, a set of non linear equations are defined. Their solution is the estimated parameters of the induction machine double-cage model.
Probabilistic analysis to assess the impact of the charge of electric vehicles on distribution grids under normal operation
Authors:   , Valsera Naranjo Eduardo
Published: July 2023

The incorporation of high levels of small-scale non-dispatchable distributed generation is leading to the transition from the traditional 'vertical' power system structure to a 'horizontally-operated' power system, where the distribution networks contain both stochastic generation and load (such as electric vehicles recharging). This fact increases the number of stochastic inputs and dependence structures between them need to be considered. The deterministic analysis is not enough to cope with these issues and a new approach is needed. Probabilistic analysis provides a better approach.
This PhD thesis describes the grid impact analysis of charging electric vehicles (EV) using charging curves with detailed battery modelling. A probabilistic method using Monte Carlo was applied to a typical Spanish distribution grid, also using mobility patterns of Barcelona. To carry out this analysis, firstly, an IEEE test system was adapted to a typical distribution grid configuration; secondly, the EV and its battery types were modeled taking into account the current vehicle market and the battery characteristics; and, finally, the recharge control strategies were taken in account.
Once these main features were established, a statistical probabilistic model for the household electrical demand and for the EV charging parameters was determined. With these probabilistic models, the Monte Carlo analysis was performed within the established scenario in order to study the lines' and the transformers' loading levels. The results show that an accurate model for the battery gives a more precise estimation about the impact on the grid. Additionally, mobility patterns have been proved to be some of the most important key aspects for these type of studies.
L'Arquitectura com a patrimoni cultural a Catalunya i a Europa : estratègies d'innovació projectual
Authors: Muntañola Thornberg José , Lafont Pomes José María , Linares Soler Alfredo , Tayà Durà Elisabet
Published: July 2023

En aquests textos es vol definir el camp de la rehabilitació urbana i arquitectònica en termes de modernitat i de projecte, i no com un procés oposat a les innovacions tecnològiques i al desenvolupament social i econòmic. La comparació entre la situació d'aquesta temàtica a Espanya i Catalunya, amb la resta d'Europa, ocupa bona part del llibre. La professora Beth Tayà, seguint pautes metodològiques iniciades als Estats Units ja fa més de vint anys, dóna consells concrets de com modernitzar tecnològicament els pobles medievals sense destruir-los, art arquitectònic que molt pocs arquitectes dominen.
Propietats dels materials i elements de construcció
Authors: Sastre Sastre Ramon
Published: July 2023

L'elecció dels materials i els elements de construcció que cal utilitzar en una obra és una tasca cada vegada més complexa. L'arquitecte es troba davant una gamma molt àmplia de possibilitats entre les quals ha d'escollir. El coneixement de les propietats d'aquests materials és una eina imprescindible si es vol fer una elecció objectiva.
Aquesta obra analitza les propietats tècniques d'aquests materials: de la massa, de l'estat de la matèria, mecàniques, reològiques, tèrmiques, com també la relació amb els fenòmens ondulatoris, aparents, temporals i de durabilitat; els costos, les repercussions sobre la salut i les implicacions ecològiques. D'altra banda, la qualitat d'informació numèrica que tenim d'aquests materials i elements fa necessària una obra que reculli, relacioni i compari tots aquests valors, ja que a l'hora de decidir utilitzar-los és convenient tenir una visió global de les diverses opcions possibles.
المعالجات الفكرية لإصلاح التجربة الديمقراطية في العراق
Authors: ا.م.د طارق عبد الحافظ
Published: July 2023

يخطا من يظن ان الديمقراطية  صندوق انتخابي فحسب بل هي منظومة متكاملة من المستلزمات التي يفترض ان تكون متواجدة لغرض تحقيق الهدف و الغاية من وجودها ، ذهاب المواطن للمشاركة في الانتخابات هي الخطوة الاولى و ليست الاخيرة في دوره في العملية الديمقراطية ، فلا يمكن ان ينتهي دور الناخب بمجرد اختيار من يمثله في البرلمان ، بل هناك ضرورة ليشارك المواطن في جميع مفاصل العملية السياسية حتى بعد انتهاء العملية الانتخابية ، و بقاء الديمقراطية شكلاً دون مضمون تفرغها من محتوها .

الديمقراطية في العراق تجربة بحاجة الى مزيداً من المعالجات منها ذات طابع فكري و اخرى ذات طابع اصلاحي مؤسساتي و دستوري ، و من اهم التحديات التي تواجها هو التحول من مراحلها الاولية ( التوافقية ) الى المراحل الدائمة ( الرسوخ الديمقراطي ) ، و هذا التحول ليس يسيراً في ظل الصراعات و الاختلافات بين الكتل السياسية ، فضلا عن غياب الرغبة الشعبية في دعم هكذا دعوات اصلاحية كون الذهنية المكوناتية هي التي تهيمن على المشهد السياسي الحالي مع غياب شبه تام الى الهوية الوطنية القائمة على اساس المواطنة العراقية .
النظام الإقليمي العربي في ظل التغيرات الدولية: آثار الحرب الروسية-الأوكرانية على التوازنات والتحالفات بالمنطقة
Authors: عبيد الحليمي
Published: July 2023

يعالج هذا البحث أثر التغيرات الدولية على النظام الإقليمي العربي، ويقارب آثار الحرب الروسية الأوكرانية على التوازنات والتحالفات بالمنطقة العربية، كما ينطلق من النظام الإقليمي العربي باعتباره مستوى من التحليل بغية فهم الديناميكيات والتفاعلات التي تقع بالمجال الجغرافي وتؤثر على السلوك الخارجي لكل دولة بالسياسة الدولية؛ ويخلص إلى أن الصراع الغربي-الروسي بشرق أوربا له تأثير على توازن القوى الداخلي والخارجي بالمنطقة، الأمر الذي يؤثر على وحدات النظام العربي من خلال زيادة المخاطر الأمنية المهددة لاستقرار العالم العربي؛ وهذا ما يدفع الدول العربية إلى إرساء تحالفات خارج نطاق النظام الإقليمي، لغاية الحفاظ على البقاء في بيئة إقليمية غير آمنة ومفتوحة للاختراق؛ وتؤكد هذه الدراسة بأن التحولات التي يعرفها النظام العالمي تتيح للدول العربية فرصة التحرر من القيود البنيوية والضغوط التي ارتبطت بنظام الهيمنة الأحادية، لكن ذلك يقتضي تقوية الجبهة العربية الداخلية على أساس احترام سيادة الدول وإعادة النظر في العلاقات بين وحدات النظام الإقليمي في الاتجاه الذي يعزز التعاون والتحالف بدل الصراع.
الاصلاحات الحكومية في العراق بين التحديات والفرص بعد عام 2003
Authors: ريبوار كريم محمود
Published: July 2023

شهد العراق بعد عام 2003، تحولاً في بنية النظام السياسي الجديد والتي برزت معها مجموعة من المتغيرات الداخلية والخارجية التي مارست دوراً ملحوظاً في تحديد مسارات العمل السياسي. وزادت عليه طابعاً من الاختلاف الشديد، متحولة بذلك الى وضع سياسي متقلب في الأداء، فضلاً عن مميزاته بين حالة من عدم الاستقرار وحالة أخرى من الاستقرار الحذر، لذلك رافقت عملية تشكيل الحكومات وبرامجها الاصلاحية في العراق ومنذ العام 2003، العديد من التعقيدات وهذا ما يشكل تحديات كثيرة تواجهه الحكومات العراقية. ولا يمكن مواجهة هذه التحديات ما لم يكن هنالك رؤية استراتيجية عميقة لإدارة البلد.
New Methods of Conflicts Resolution: Incentives and Disincentives for managing Conflict
Authors: Hussein A. Al Battawi
Published: July 2023

Conflict is an inherent part of human interactions and can arise in various settings, such as personal relationships, workplaces, and international affairs. Although of conflict is an inevitable part of human interactions, but new approaches to conflict resolution offer a more constructive and collaborative way of resolving conflicts. We therefore can refer to approaches, methods, or techniques that figured out as tools to settle the differences in the context of conflicts. Some of these that tools well known such as negotiation or bargaining, and third — party or mediation, adjudication and economic incentives and disincentives for managing conflict. Some of methods or techniques are relatively new to the peacekeeping community, such as problem solving workshops, conflict resolution education in the field, and training in conflict management techniques.
دور الدبلوماسية الدفاعية في تحقيق أهداف السياسة الخارجية لدولة الامارات العربية المتحدة
Authors: اسماء جاسم الحمد  , هاني عمر البسوس
Published: July 2023

تنطلق الدراسة من محاولة الإجابة على تساؤل رئيس يرتبط بدراسة الدبلوماسية الدفاعية الإماراتية وآلياتها المشتركة مع الدول الصديقة والشقيقة خلال الفترة 2011-2021، والدور الذي تلعبه هذه الدبلوماسية في تحقيق أهداف السياسة الخارجية الإماراتية، كما تدرس مدى نجاحها في تجاوز التحديات الأمنية التي تواجه الإمارات العربية المتحدة على المستوى الإقليمي والدولي. تفترض هذه الدراسة أن الدبلوماسية الدفاعية نجحت في تحقيق أهداف السياسة الخارجية حيث ساهمت في توثيق أواصر الصداقة والتعاون مع جميع الدول، وإنشاء علاقات استراتيجية وشراكات متميزة ومتطورة تراعي احتياجات ومتطلبات المستفيدين والشركاء. بناءً على ذلك تُناقش الدراسة الأسئلة البحثية التالية: كيف ساهمت الدبلوماسية الدفاعية في تعميق العلاقات الخارجية لدولة الإمارات العربية المتحدة؟  وما هي آليات الدبلوماسية الدفاعية الإماراتية؟ وتعتمد الدراسة على خيارات منهجية دقيقة من بينها منهج دراسة الحالة والمنهج الوصفي. وقد تناولت الدراسة مراجعة لأهم الأدبيات السابقة ذات العلاقة بالموضوع محل الدراسة، وذلك من خلال دراسة سياقاتها ومحتواها، وما قد تضيفه للموضوع محل البحث. توصلت الدراسة إلى خلاصات تتعلق بدور الدبلوماسية الدفاعية في تحقيق أهداف السياسة الخارجية الإماراتية وتعميق علاقاتها مع الدول الصديقة والشقيقة، حيث لعبت القوات المسلحة دورًا في توقيع اتفاقيات تعاون دفاعية مع دول عديدة لحفظ أمن واستقرار الإمارات.
Berberine Synergizes with Cisplatin via Inducing Apoptosis on A549 non-Small Cell Lung Cancer Cells
Authors: Becit-Kızılkaya Merve , Öncü Şeyma , Şen Serkan , Çelik Sefa
Published: July 2023

Objective: Lung cancer is the most common cause of morbidity and mortality. Platinum-based chemotherapy, which is the primary line of treatment, offers limited benefit due to drug resistance and side effects. Berberine (BBR), which is characterised by its potent and safe anticancer activity, represents a promising combination option in chemotherapy. To overcome the limitations in lung cancer chemotherapy, we investigated whether BBR and cisplatin (CIS) exert synergistic effects on non-small cell lung cancer cell line (A549) based on cytotoxicity and apoptotic response markers.
Methods: The potential cytotoxic effects of the combination treatment were evaluated using the MTT and Chou-Talalay methods. Elisa assays were also performed to measure the levels of the pro-apoptotic protein Bax and the effector protein caspase (Cas)-3.
Results: The results showed that BBR alone reduced A549 cell viability in a dose-dependent manner and synergized with CIS (CI =0.34±0.05 at IC50 concentrations). Elisa results showed that the combined treatment (both at IC50 concentrations) modulated apoptotic signalling pathways in A549 cells. Bax and Cas3 protein levels were dramatically enhanced in A549 cells treated with CIS +BBR compared to control (0.5% DMSO) (p < 0.001).
Conclusion: Our results suggest that BBR can synergistically enhance the therapeutic effect of CIS in A549 cells. The potential therapeutic efficacy of BBR as part of a combination in current chemotherapy should be supported by in-depth research and clinical studies on the molecular mechanisms associated with cancer.
Criptomonede și criptosecurități – Contracte inteligente
Authors:   Romanian Academy, Sfetcu Nicolae
Published: July 2023

Criptomonedele au devenit un „cuvânt la modă” pentru a se referi la o gamă largă de evoluții tehnologice, prin care criptomonedele sunt securizate. Criptosecuritățile sunt folosite pentru înregistrarea, emiterea și transferul de acțiuni obișnuite și alte titluri corporative, astfel încât tabelul de capitalizare al unei companii să fie întotdeauna corect și actualizat. Contractul inteligent este protocol informatic destinat să faciliteze, să verifice sau să execute în mod digital negocierea sau executarea unui contract, permițând tranzacții credibile, trasabile și ireversibile, fără terțe părți.
Pendampingan Umkm Belopar Rempeyek Dalam Produksi Keripik Rempeyek Kacang Melalui Strategi Repackaging
Authors: Andi Hasriliandi Halim , Rahman Suradi Adam , Ramli Fatmawati , Irga Satrawati Taslim Andi , Agustan
Published: July 2023

Sejak pemerintah mengeluarkan kebijakan pembatasan sosial berskala besar, muncul berbagai jenis UMKM Baru yang akhirnya menjawab tantangan baru tersebut dalam memproduksi aneka makanan dan keripik di Rumah saja. Populasi UMKM berkembang pesat karena kebiajakan tersebut. UMKM menjadi solusi ekonomi alternatif masyarakat dalam menggerakan kembali perekonomian keluarga yang sempat terhenti karena pandemi COVID-19. Namun, dari banyaknya UMKM tersebut, hanya sedikit yang mampu bertahan dan melakukan survive dengan pesaing yang ada di pasar, selebihnya bahkan jalan di tempat, bahkan beberapa diantaranya gulung tikar. Kondisi tersebut terjadi karena kurangnya wawasan pemilik dalam mengelola usaha dan ketidakmampuan pemilik untuk mengikuti arus teknologi yang semakin berkembang. Hadirnya pengabdian kepada masyarakat ini yang dilakukan kepada salah seorang pemilik sekaligus pelaku UMKM di desa Bonto Lebang melalui pendampingan UMKM Belopar Rempeyek melalui strategi repackaging. PKM ini berlangsung selama 2 bulan dimulai dari tanggal 28 April 2023 – 28 Juni 2023. Metode yang digunakan adalah metode pendampingan kepada UMKM Belopar rempeyek yang telah cukup lama berjalan namun sulit mengalami perkembangan yang signifikan seperti para pesaing lainnya. Hasil dari strategi repackaging yang dilakukan, diharapkan mampu membuat tampilan produk yang dipasarkan menjadi lebih menarik dan elegan. Tampilan yang lebih menarik tentunya diharapkan akan membuat konsumen lebih tertarik dan membeli produk tersebut.