bluuebunny/crossref_metadata_2025 huggingface dataset:
A Static Load Balancing Software for Parallel Applications
Authors: Cruz Adriano Joaquim de Oliveira , Franco Cláudia Rita de , Vidal Leonardo Silva
Published: September 2022

This work describes the implementation and benchmarks applied to a load balancing software designed to improve performance of parallel applications running on networks of heterogeneous and non-dedicated workstations. A user level mechanism to gather workload information about each node and the policy to treat this information in order to generate a precise snapshot of the workload of each node of the parallel machine are described throughout this work. An analysis of the main issues concerning workload evaluation is provided, along with a brief explanation on the support offered by current operating systems and ways to overcome their problems. Finally, results and interpretations of comparative tests made between BEC/PVM applications and PVM applications are presented.
Concurrent Gang: Towards a Flexible and Scalable Gang Scheduler
Authors: Silva Fabricio Alves Barbosa da , Scherson Isaac D.
Published: September 2022

Gang scheduling has been widely used as a practical solution to the dynamic parallel job scheduling problem. Parallel tasks of a job are scheduled for simultaneous execution on a partition of a parallel computer. Gang Scheduling has many advantages, such as responsiveness, efficient sharing of resources and ease of programming. However, there are two major problems associated with gang scheduling: scalability and the decision of what to do when a task blocks. In this paper we propose a class of scheduling policies, dubbed Concurrent Gang, that is a generalization of gang-scheduling, and allows for the flexible simultaneous scheduling of multiple parallel jobs with different characteristics. Besides that, scalability in Concurrent Gang is achieved through the use of a global clock that coordinates the gang scheduler among different processors.
Approximation of Elementary Functions by Polynomials and Rational Functions - Some Results for FPGA Based Implementations
Authors: Araújo António J. , Matos José S.
Published: September 2022

The hardware evaluation of elementary functions such as exp(x) and sin(x) is advantageous due to the performance that can be reached when compared with software solutions. Such evaluations can be done by computing simple functions thal approximate the targeted elementary functions. Actual microprocessors and specific processors like the digital signal processors include computing capabilities for some elementary functions but they could be inappropriate for some situations. Due to the great impact that Field Programmable Gate Arrays (FPGA) have in a wide range of hardware applications, specially in areas where hardware customization can improve the overall performance, the implementation of these functions in FPGA devices is worth considering. The reconfigurabllity they offer increases the flexibility and the power of such custom computing machines. Implementations of common elementary functions using single precision floating point arithmetic are described and the correspondent results are presented.
A Vector Orthogonal Multiprocessor NEOMP and its Use in Neural Network Mapping
Authors: Saito Jose Hiroki
Published: September 2022

A vector Orthogonal Multiprocessor architecture NEOMP and its use by a feedforward artificial neural network, Neocognitron, is described. The proposed architecture is composed by several vector processing units, and a scalar control processor, which access the memory modules in a orthogonal fashion. The performance analysis of the architecture is realized, identifying the concurrent computation grains in the neocognitron, which are attributed to the vector processors. The analysis of the architecture showed that its speed-up is linear in a wide range, where the implementation of NEOMP is appropriate. The scalar control processor and the vector processing unit hardware prototype were simulated and showed the feasibility of their implementation, each one in a single FPGA, which inspire the construction of NEOMP as a real time neocognitron, and other feedforward neural network systems, using vector orthogonal multiprocessor architecture.
Geração automatizada de drivers e stubs de teste para JUnit a partir de especificações U2TP
Authors: Biasi Luciano B. , Becker Karin
Published: September 2022

Teste é amplamente usado para garantir a qualidade em produtos de software. O teste de unidade é realizado na menor parte funcional de um software e visa descobrir defeitos nestas unidades. JUnit é uma ferramenta de apoio ao teste unitário, a qual auxilia desenvolvedores na automação dos testes e verificação dos resultados. Porém, muito tempo e esforço são gastos para codificar os drivers e os stubs de teste necessários a esta ferramenta, minimizando os benefícios esperados. O Perfil de Teste da UML 2.0 (U2TP) permite especificar artefatos de teste em uma notação padronizada, de alto nível, gráfica, e independente de linguagem de programação. Este trabalho aborda a geração totalmente automatizada de drivers e stubs de teste para ferramenta JUnit a partir de especificações de testes modeladas com o U2TP. Os modelos e algoritmos desenvolvidos foram aplicados a um estudo de caso, gerando corretamente todo o código correspondente.
Specification of Real-Time Systems with Graph Grammars
Authors: Michelon Leonardo , Costa Simone André da , Ribeiro Leila
Published: September 2022

This paper presents a formal approach to specify and analyze realtime systems. We extend Object-Based Graph Grammars, a description technique suitable for the specification of asynchronous distributed systems, to be able to explicitly model time constraints. The semantics of the systems is defined in terms of Timed Automata, allowing the automatic verification of properties.
Component-Based Groupware Development Based on the 3C Collaboration Model
Authors: Gerosa Marco Aurélio , Raposo Alberto Barbosa , Fuks Hugo , Lucena Carlos José Pereira de
Published: September 2022

Groupware is evolutionary and has specific difficulties of development and maintenance. Its code normally becomes unstructured and difficult to evolve. In this paper, a groupware development approach based on components organized according to the 3C collaboration model is proposed. In this model, collaboration is analyzed based on communication, coordination and cooperation. Collaboration requirements, analyzed based on the 3C model, are mapped onto software components, also organized according to the model. The proposed approach is investigated as a case study to the development of the new version of the AulaNet environment. The environment’s code currently suffers from the aforementioned problems. In order to instantiate the environment’s communication services, 3C based component kits were developed for the case study. The components allow composition, re-composition and customization of services to reflect changes in the collaboration dynamics.
Aspect-oriented Code Generation
Authors: Hecht Marcelo Victora , Piveta Eduardo Kessler , Pimenta Marcelo Soares , Price R. Tom
Published: September 2022

The maturing of aspect-oriented software modeling approaches provides support for the automatic generation of aspect-oriented code. In this paper we describe several means for automatic code generation from Theme/UML models, and discuss some difficulties involved in this process.
An Experience in Using Components for a Modular Construction of Agents for Agent-based Simulations
Authors: Briot Jean-Pierre , Meurisse Thomas , Peschanski Frédéric
Published: September 2022

This paper summarizes our experience in using a component model for constructing agents for agent-based simulations. In this model, named MALEVA, components encapsulate various units of agent behaviors or activities (e.g., follow gradient, flee, die, reproduce). Among its specificities, it extends the principles of software composition to the specification of control, through the notions of control ports and control components. A notion of composite component allows complex behaviors to be constructed from simpler ones. Some examples illustrate how our model may support a progressive construction of agent behaviors and also various forms of potential reuse. We also discuss the benefits of our model for a fine grain control of activation and scheduling.
AMGraA: Uma Abordagem para Migração Gradativa de Aplicações
Authors: Fontanette Valdirene , Prado Antonio Francisco do , Pereira Marco Antonio , Oliveira André Luis Costa de
Published: September 2022

Novos requisitos, mudanças de tecnologias, legislações e outras necessidades exigem que as aplicações sejam atualizadas ao longo do seu tempo de vida. Pesquisas têm sido realizadas para oferecer suporte a essa evolução contínua do software. Hoje, essa evolução é ainda maior considerando as novas tecnologias para Web e para a computação ubíqua. Embora existam várias abordagens de modernização de aplicações na literatura, o processo nas empresas ainda é realizado quase sempre de forma manual e “ad-hoc”. Motivados em pesquisar e melhorar esse processo de reconstrução de software apresenta-se uma abordagem, denominada AMGraA, para a modernização gradativa do software.
Pontos de Casos de Uso Técnicos para Manutenção de Software
Authors: Freire Yara Maria Almeida , Belchior Arnaldo Dias
Published: September 2022

As atividades de estimativas de tamanho, esforço, prazo e custo têm alcançado cada vez mais importância, uma vez que estimativas confiáveis relacionadas ao projeto auxiliam bastante seu planejamento e monitoração. Este trabalho propõe estimativas de manutenção de software, desenvolvido a partir da abordagem de casos de uso, estendendo a técnica TUCP (Pontos de Caso de Uso Técnico), proposta para estimativas de projetos de desenvolvimento de sistemas.
Generalized Extremal Optimization: a competitive algorithm for test data generation
Authors: Abreu Bruno T. de , Martins Eliane , Sousa Fabiano L. de
Published: September 2022

Software testing is an important part of the software development process, and automating test data generation contributes to reducing cost and time efforts. It has recently been shown that evolutionary algorithms (EAs), such as the Genetic Algorithms (GAs), are valuable tools for test data generation. This work assesses the performance of a recently proposed EA, the Generalized Extremal Optimization (GEO), on test data generation for programs that have paths with loops. Benchmark programs were used as study cases and GEO’s performance was compared to the one of a GA. Results showed that using GEO required much less computational effort than GA on test data generation and also on internal parameter setting. These results indicate that GEO is an attractive option to be used for test data generation.
Pairwise structural testing of object and aspect-oriented Java programs
Authors: Franchin Ivan Gustavo , Lemos Otávio Augusto Lazzarini , Masiero Paulo Cesar
Published: September 2022

Most structural testing approaches are targeted at units of implementation (i.e., unit testing). A problem that is not addressed by unit testing is the interaction among units, with respect to the correctness of their interfaces. We present a structural integration testing approach for object-oriented (OO) and aspect-oriented (AO) Java programs as an extension of a unit testing approach we have developed before. To make the activity feasible, instead of considering arbitrary call depths, we address the testing of pairs of units. We propose a model called PWDU (PairWise Def-Use) graph to represent the control and data-flow of pairs of units. Based on the PWDU , three testing criteria are defined: all-pairwise-integrated-nodes, all-pairwise-integrated-edges (controlflow based criteria), and all-pairwise-integrated-uses (a data-flow based criterion). We also present the implementation of our approach as an extension to the Java Bytecode Understanding and Testing (JaBUTi) family of testing tools along with an example of usage.
Integration Testing of Aspect-Oriented Programs: a Structural Pointcut-Based Approach
Authors: Lemos Otávio Augusto Lazzarini , Masiero Paulo Cesar
Published: September 2022

Several testing approaches focus on finding faults in software units of implementation (i.e., unit testing). A problem not addressed by unit testing is the interaction among units, with respect to the correctness of their interfaces. With the use of Aspect-Oriented Programming this problem is further complicated by pointcut mechanisms that cut new interfaces in the base program. In this paper a structural integration testing approach for AspectJ programs is presented. A model called PCCFG (Pointcut-based Control Flow Graph) to represent the flow of control between base units and pieces of advice is defined. Based on the PCCFG, two control-flow criteria for a crosscutting coverage measure are defined: all-pointcut-based-advice-nodes and all-pointcut-based-advice-edges. As a preliminary evaluation of the feasibility and effectiveness of the proposed approach, an implementation of the criteria in an AspectJ testing tool (JaBUTi/PC-AJ) is presented along with an application example. The example shows evidence of the effectiveness of the pointcut-based criteria to find AO related faults compared to unit testing criteria.
Um catálogo de stubs para apoiar o teste de integração de programas orientados a aspectos
Authors: Ré Reginaldo , Domingues André L. dos S. , Masiero Paulo Cesar
Published: September 2022

Um dos problemas encontrados no teste de programas orientados a objetos é a ordem em que classes são integradas e testadas na presença de ciclos de dependência. Esse problema, também observado em programas orientados a aspectos, provoca aumento do esforço da atividade de teste pela necessidade de implementação de stubs para quebrar os ciclos de dependência. Este trabalho apresenta um conjunto de stubs e drivers coletados durante a condução de um estudo com quatro diferentes estratégias de teste de integração aplicadas a dois diferentes sistemas implementados com aspectos. Também são mostradas decisões de implementação tomadas em relação ao contexto em que os stubs e drivers são usados, além de diretrizes a serem seguidas durante a implementação desses artefatos de software para apoiar o teste de programas orientados a aspectos.
Avaliação Experimental de um Método para Avaliação de Equipes de Requisitos
Authors: Serrano Milene , Serrano Maurício , Napolitano Filipe , Kinder Eduardo , Douglas Mark , Loyola Danielle , Rezende Bruno , Leite Julio Cesar Sampaio do Prado
Published: September 2022

Esse artigo relata um processo de avaliação experimental de um método de avaliação de equipes de requisitos. Avaliar equipes é uma área explorada no âmbito de gerência de software. No entanto, verificamos que em termos específicos de engenharia de requisitos havia uma lacuna significativa na literatura de avaliação de equipes, o que nos levou a construir um método de avaliação. Nesse artigo mostramos como esse método foi avaliado utilizando-se conceitos de experimentação. A experimentação envolveu quatro equipes, um total de 20 pessoas e foi conduzida ao longo de três meses. Com base na experimentação fizemos uma análise qualitativa do método, que foi utilizada para a própria melhoria do método. O artigo detalha o desenho do experimento, enfatizando as avaliações qualitativas que contribuíram para a melhoria do método de avaliação de equipes de requisitos.
Usando Aspectos e Composição Dinâmica para prover Adaptação Ciente ao Contexto em Sistemas Ubíquos
Authors: Santos Isanio Lopes Araujo , Delicato Flavia C. , Pires Paulo F. , Batista Thais , Oliveira Ana Liz Souto , Pirmez Luci
Published: September 2022

Aplicações para a computação ubíqua operam em ambientes onde a disponibilidade de recursos muda significativamente durante a sua operação. Tal característica demanda que aplicações sejam adaptativas e cientes do seu contexto de execução. Visando atender esses requisitos, nós propomos PACCA (Projeto de Aplicações Ciente ao Contexto e Adaptativas), um arcabouço para desenvolvimento e execução de aplicações adaptativas cientes de contexto. O paradigma de orientação a aspectos é usado no PACCA para modularizar o comportamento adaptativo e dissociá-lo da lógica da aplicação. A orientação a aspectos aliada a composição dinâmica de software oferecem suporte para adaptação ciente ao contexto, guiada por políticas previamente definidas.
O Sistema de Detecção de Intrusão Asgaard
Authors: Campello Rafael Saldanha , Weber Raul Fernando , Serafim Vinicius da Silveira , Ribeiro Vinicius Gadis
Published: September 2022

This paper describes a study being developed at the Security Group (Gseg-UFRGS), of the Federal University of Rio Grande do Sul, aimed to the creation of a mudular and decentralized intrusion detection system, called Asgaard, trying to fill the main gaps left for the current IDS. Its main characteristics and features are described, as well as its architectures and main modules.
Considerações sobre Segurança em Redes Sem Fio
Authors: Peres André , Weber Raul Fernando
Published: September 2022

O presente trabalho apresenta uma descrição da forma de funcionamento dos dispositivos sem fio padrão IEEE 802.11, focando especificamente as características envolvendo a segurança neste tipo de ambiente. São descritos os mecanismos de segurança deste padrão e as fraquezas do protocolo de segurança WEP – Wired Equivalent Pivacy atualmente utilizado. Também são apresentadas algumas propostas de aprimoramento da segurança da comunicação entre dispositivos sem fio, as quais são, atualmente, fontes de estudo.
Ostracon: Um Sistema de Votação Digital Segura pela Internet
Authors: Pereira Fabiano Castro , Custódio Ricardo Felipe
Published: September 2022

Apresenta-se o Sistema Ostracon de votação digital segura pela Internet, que implementa o protocolo criptográfico Farnel. É feita uma comparação deste sistema com outros existentes.
Repositórios Seguros de Dados para Proteção de Agentes Móveis contra Plataformas Maliciosas
Authors: Wangham Michelle S. , Fraga Joni da Silva , Deitos Rafael J. , Jung Galeno A.
Published: September 2022

Este trabalho define um esquema de segurança que visa diminuir os riscos que os agentes móveis com itinerário livre estão suscetíveis quando visitam plataformas maliciosas. O esquema é composto por três repositórios seguros de dados que visam garantir a integridade dos dados armazenados, sendo que dois deles oferecem ainda a confidencialidade dos dados.
Proteção de detectores de intrusão através de máquinas virtuais
Authors: Laureano Marcos , Maziero Carlos , Jamhour Edgard
Published: September 2022

Os sistemas de detecção de intrusão monitoram continuamente a atividade de um sistema ou rede, buscando evidências de intrusões. Entretanto, detectores de intrusão baseados em host podem ser adulterados ou desativados por invasores bem sucedidos. Este trabalho apresenta uma arquitetura que visa proteger detectores de intrusão baseados em host através de máquinas virtuais. A proposta aqui apresentada usa o isolamento de espaços de execução provido por um ambiente de máquinas virtuais para separar o detector de intrusão do sistema a monitorar. Em conseqüência, o detector de intrusão torna-se invisível e inacessível a eventuais intrusos. Os testes realizados mostram a viabilidade dessa solução.
SecLEACH – A Random Key Distribution Solution for Securing Clustered Sensor Networks
Authors: Oliveira Leonardo B. , Wong Hao Chi , Bern Marshall , Habib Eduardo , Loureiro Antonio A. F. , Dahab Ricardo
Published: September 2022

Wireless sensor networks are ad hoc networks comprised mainly of small sensor nodes with limited resources, and can be used to monitor areas of interest. Recent work has shown that clustered sensor networks can increase system throughput, decrease system delay, and save energy. In this paper, we show that random key predistribution, first proposed and studied in the context of flat wireless sensor networks, is a very attractive key distribution solution for clustered sensor networks with rotating cluster heads, such as LEACH.
Avaliação de Mecanismos de Segurança em uma Plataforma para Redes de Sensores Sem Fio
Authors: Guimarães Germano , Souto Eduardo , Kelner Judith , Sadok Djamel
Published: September 2022

Em grande parte das aplicações para Redes de Sensores Sem Fio verifica-se a necessidade de utilizar mecanismos que forneçam segurança aos dados transmitidos. O propósito deste trabalho é avaliar em uma plataforma real de nós sensores o impacto introduzido pela utilização de mecanismos de segurança do ponto de vista da rede como um todo, observando as limitações destes dispositivos em capacidade computacional e energética. Este trabalho mostra através de simulação e medição que diferentes algoritmos de criptografia influenciam de maneiras diferentes aspectos importantes como a vazão, o atraso de mensagens, além do consumo de energia.
Prognostic value of nutritional and inflammatory scores in Transcatheter aortic valve replacement patients
Authors: ÖZBEK Mehmet , ACUN Barış , ARIK Baran , DEMİR Muhammed , OYLUMLU Muhammed , TOPRAK Nizamettin
Published: September 2022

Background: Aortic Stenosis (AS) is a common heart valve disease that especially affects the elderly population and is seen with the aging of the society. In recent years Transcatheter aortic valve replacement patients (TAVR) has been increasingly applied worldwide as a procedure for the treatment of severe AS. Recently, various biomarkers and derived marker approaches have been studied in AS patient groups as in many cardiovascular diseases. Since it has been previously shown that increased inflammatory scores and poor nutritional scores are closely associated with the development process and prognosis of cardiovascular diseases, we hypothesized that these scores may be associated with prognosis after TAVR. Therefore, in this study, we aimed to make a detailed evaluation in terms of mortality determinants after TAVR.

Methods and Results: 118 TAVR patients were included in the analysis. Median follow-up of 118 patients was 40.5 months. In terms of inflammatory status scores, the systemic immune inflammatory (SII) score (p= 0.027), the neutrophil/lymphocyte ratio (NLR) score (p= 0.012), and the platelet/lymphocyte ratio (PLR) score (p= 0.012) in the death group was found to be significantly higher. As nutritional status scores, the prognostic nutritional index (PNI) score (p= 0.003) was lower in the death group and the median Controlling Nutritional Status (CONUT) score (p= 0.002)) found significantly higher.

Conclusion: In severe and high-risk AS patients undergoing TAVR, measurement of malnutrition with the CONUT score and increased inflammatory status with the SII score was associated with an increased risk of all causes mortality in long-term follow-up. It has been determined that the development of complications related to the procedure is an indicator of increased mortality not only in the short term but also in the long-term follow-up.
LA RESPONSABILIDAD DEL ADULTO MAYOR EN CASOS DE CRUELDAD Y MALTRATO ANIMAL, CUANDO ES VISTO POR NIÑOS, NIÑAS Y ADOLESCENTES
Authors: Inés Domínguez Cecilia
Published: September 2022

El trabajo es una presentación del segundo encuentro presentado en el II Encuentro Nacional de Derechos de los Animales No Humanos, realizado en los días 6 y 7 de junio de 2019, en el Salón Azul de la Facultad de Derecho de la Universidad de Buenos Aires. Se analiza el caso práctico de un video en el que un niño pequeño, de aproximadamente 8 años, está montado encima de un jabalí y le clava un cuchillo en el animal moribundo, mientras otros niños y adultos presentes celebran la “hazaña”. A partir del evento se explora el rol de la familia en la educación de niños, niñas y adolescentes, y la inclusión de valores de respeto y no violencia hacia los animales no humanos.
TRACCIÓN A SANGRE, DERECHOS ANIMALES Y JUSTICIA SOCIAL
Authors: Nicolás Di Benedetto Fernando
Published: September 2022

Este artículo analiza la situación de los vehículos de tracción humana y no humana como un retrato de la vulnerabilidad social a la que se insertan sus conductores, resultando, sobre todo, en hallazgos de sufrimiento y crueldad animal practicada contra no humanos empleados en estas prácticas. En este sentido, el autor busca esclarecer qué derechos tienen los humanos y no humanos a respecto del uso de la tracción a sangre, como él denomina a esta modalidad. Por lo tanto, la investigación aborda algunas peculiaridades de la Ley Penal Argentina n.º. 14.346, específicamente en lo que respecta a los animales no humanos como víctimas del delito de maltrato, además de contextualizar las circunstancias que involucran a los vehículos de tracción humana y no humana, como la vulnerabilidad social, la marginalidad, la ineficiencia estatal e incluso la protección de los niños, niñas y adolescentes conductores. La metodología elegida para esta investigación es la revisión bibliográfica, la investigación documental y la presentación de casos, como se desprende de las prohibiciones de tracción humana y animal que se encuentran en las ciudades de Paraná/AR y Quilmes/AR.
Understanding Agility as a Parameter for Fuel-Flexible Ships
Authors: Lagemann Benjamin , Erikstad Stein Ove , Brett Per Olaf , Garcia Agis Jose Jorge
Published: September 2022

With the need for low-emission maritime transport solutions, ship owners and designers face uncertainty and unpredictability when it comes to the selection of fuel today and in the future. The effects of this unpredictability can be mitigated to a certain extent by fuel-flexible ships. In the light of flexibility, both agility and affordability, i.e. the time and cost of changes, are important parameters to be considered in the early design phase. We apply and discuss these parameters and their consequences for both existing flexible solutions and new ship design alternatives.
TTW (Tank to Wheel) and WTW (Well to Wheel) Analysis Using Electric Buses on the Line Eko 1 in Belgrade
Authors: Mišanović Slobodan
Published: September 2022

The bus subsystem is the holder of the public transport function in many cities with a dominant representation of diesel-powered buses. In the last few years, electric buses (E-bus) have been increasingly used in many cities around the world (China, Europe, South America), making them the main alternative to conventional buses (diesel, CNG). The main advantages of using electric buses compared to conventional buses are higher energy efficiency, zero pollution emitted at the local level, more favorable carbon dioxide emissions observed at the regional or national level depending on the method of obtaining electricity, lower noise level. Since 2016, five electric buses have been operating in Belgrade on the EKO 1 line (Vukov spmenik-Belvil). The paper will present the environmental benefits of the use of electric buses observed through TTW (Tank to Wheel) and WTW (Well to Wheel) analysis, compared to diesel and CNG buses.
Efeitos de diferentes protocolos de treinamento de força sobre parâmetros influenciadores da Sarcopenia em idosos: uma revisão sistemática
Authors: Registre Farah , Lopes Lilian Maria Peixoto , Souza Perciliany Martins , Becker Lenice Kappes , Borba Diego de Alcantara , Ferreira Júnior João Batista , Oliveira Emerson Cruz de , Coelho Daniel Barbosa
Published: September 2022

Introdução: A sarcopenia é considerada uma patologia caracterizada pela redução da massa muscular esquelética e da sua funcionalidade, sendo que vários dos parâmetros que influenciam sobre a sarcopenia sofrem interferência do treinamento de força. Objetivo: Revisar os efeitos dos diferentes protocolos de treinamento de força (frequência, duração e intensidade) sobre parâmetros influenciadores da sarcopenia. Métodos: Trata-se de uma revisão sistemática de estudos originais, quantitativos, observacionais, publicados entre 2010 a 2020, em inglês, espanhol e português, e indexados nas bases de dados SciELO, PubMed e periódico CAPES. Os descritores utilizados foram: “força muscular” (“muscle strenght”, “fuerza muscular”), “sarcopenia” (“sarcopenia”), “envelhecimento” (“aging”, “envejecimiento”), “idosos” (“olders, “ancianos”), “treinamento de força/resistência” (“strength training”, “entrenamiento de fuerza”). Foram recuperados 215 artigos, entre eles 11 atenderam aos critérios de inclusão, sendo incluídos na revisão. Resultados: Dentre os 11 estudos analisados, observa-se que o treinamento de força aplicado em diferentes protocolos foi eficiente em aperfeiçoar parâmetros como massa e força musculares, equilíbrio corporal e desempenho em testes diagnósticos de sarcopenia. Conclusão: Esta revisão evidencia os benefícios da prática de exercício de força em diferentes protocolos sobre parâmetros que influenciam na instalação do quadro de sarcopenia em idosos. O exercício de força se apresenta como meio aplicável, prático e não farmacológico da prevenção de sarcopenia.
Non-equilibrium transport of charged particles in a wall-confined decaying plasma under an externally applied electric field
Authors: Wang Yao-Ting , Luo Lan-Yue , Li He-Ping , Jiang Dong-Jun , Zhou Ming-Sheng ,   Department of Engineering Physics, Tsinghua University, Beijing 100084, China
Published: September 2022

In this work, non-equilibrium transport processes of the charged particles in a plasma confined between two parallel plates with externally applied electric fields are analyzed with the charged-particle transport of laser-induced plasma as the major research background. The theoretical analyses of the transient responses of the electrons to the externally applied electrostatic fields are conducted under different initial distributions of the plasma parameters including the loss and the oscillation frequency of the electrons in the transient oscillation process, and the critical value of the electron number density for the initial electron temperature effect of the ion transport. The particle-in-cell (PIC) modeling results are consistent well with the theoretical predictions. Based on the preceding results, the PIC simulations of the ion extraction process by imposing a radio-frequency (RF) electric field on the electrostatic field are conducted. The modeling results indicate that there exists an obvious resonance phenomenon in the ion extraction process, in which the ion extraction flux is significantly increased. Under a certain operating condition, the ion extraction time at the RF resonance point is reduced to 5.8% of its original value with only an electrostatic field. Further analysis shows that, on the one hand, the electrons will be heated by the externally applied RF electric field, and thus, the propagation velocity of the ion rarefaction wave will be increased; on the other hand, the electron oscillations will be enhanced, resulting in losing more electrons in the electron oscillation process and a higher plasma potential, which ultimately leads to a higher ion extraction flux and a shorter ion extraction time.
An introduction of preference based stepping ahead firefly algorithm for the uncapacitated examination timetabling
Authors: Nand Ravneil , Sharma Bibhya , Chaudhary Kaylash
Published: September 2022

In recent times, there has been a growing attention to intelligent optimization algorithms centred on swarm principles such as the firefly algorithm (FA). It was proposed for the continuous domain that mimics the attraction of fireflies to flashing light and has been used in discrete domainsviamodification. A discrete domain that is a major challenge in most higher education institutes (HEI) is examination timetabling. This article presents a new methodology based on FA for uncapacitated examination timetabling problems (UETP) where the proposed method is an extension of earlier work by the authors on the continuous domain. UETP is considered in this article as it is a university examination timetabling problem, which is still an active research area and has not been solved by FA algorithm as per authors knowledge. The proposed method concentrates on solving the initial solution using discrete FA where it consolidates the reordering of examinations and slots through a heuristic ordering known as neighborhood search. Three neighborhoods are employed in this research, where one is used during the initialization phase while two are utilized during solution improvement phase. Later, through preference parameters, a novel stepping ahead mechanism is used, which employs neighborhood searches built on previous searches. The proposed method is tested with 12 UETP problems where the preference based stepping ahead FA creates comparative results to the best ones available in the literature for the Toronto exam timetabling dataset. The results obtained are proof of concept at the preliminary stage and require further experiments on other educational datasets such as the second international timetable competition benchmark sets. The newly introduced preference based stepping ahead mechanism takes advantage of the current best solution space where it exploits the solution space for better solutions. This paves the way for researchers to utilize the mechanism in other domains such as robotics,etc.
Effects of plastic film mulching on the spatiotemporal distribution of soil water, temperature, and photosynthetic active radiation in a cotton field
Authors: Yang Beifang , Feng Lu , Li Xiaofei , Yang Guozheng , Ma Yunzhen , Li Yabing
Published: September 2022

Plastic film mulching (PFM) affects the spatiotemporal distribution of soil moisture and temperature, which in turn affects cotton growth and the spatiotemporal distribution of canopy photosynthetically active radiation (PAR). Due to the spatial heterogeneity of soil moisture, temperature and limited monitoring methods, the issues such as relatively few sampling points and long sampling intervals in most existing studies prevent the accurate quantification of spatiotemporal changes in moisture and temperature along soil profile. To investigate the effects of PFM on spatiotemporal changes in soil moisture, temperature, and canopy PAR in cotton fields, two field trials of plastic film-mulched (M) and nonmulched (NM) cultivations were performed in 2018 and 2019. The grid method was used for the soil information continuous monitoring and multiple-time fixed-site canopy PAR monitoring during the duration of cotton growth. Two-year field trial data showed that, M cultivation increased soil moisture by approximately 13.6%–25% and increased temperature by 2–4 °C in the 0–50 cm soil layer before the first irrigation (June 20) and by 1–2 °C in the 70–110 cm soil layer, compared with NM cultivation. In addition, the temperature difference between the two treatments gradually decreased with the increase in irrigation and air temperature. The M treatment reached the peak PAR interception rate 10 days earlier than the NM treatment. In 2018 and 2019, the PAR peak value under the M treatment was 4.62% and 1.8% higher than that under the NM treatment, respectively, but the PAR interception rate was decreased rapidly in the late growth stage. Overall, PFM had an effect on soil moisture retention during the whole growth period and greatly increased the soil temperature before budding stage, thus promoted the early growth of cotton. Considering this, we suggest that the irrigation quota and frequency could be appropriately decreased in the case of plastic film mulching cultivation. For nonmulching cultivation, the irrigation quota and frequency should be increased, and it is necessary to take measures to improve the soil temperature before middle July.
Comparison of Grape Patterns in Blue and White Chinese Porcelain and Ottoman Ceramics
Authors: BEDER Samet
Published: September 2022

Tarihte ilk olarak mimari süslemelerde karşımıza çıkan çini, zamanla yeni tekniklerin de geliştirilmesiyle günlük ihtiyaç için kullanılan kap kacaklara da uygulanmaya başlamıştır. Sarayın günlük kullanımı için üretilen seramiklerde
de çini süslemelerin en kusursuz örnekleri verilmiştir. Günümüze dek ulaşabilen örnekler içinde anlaşılmaktadır ki en gelişmiş seramik süsleme örnekleri Osmanlı döneminde ortaya çıkmıştır. Bu seramiklerin süsleme disiplini incelendiğinde
ise Türk çini sanatına damgasını vuran, farklı bir süsleme anlayışı ortaya koyan mavi beyaz dönemi dikkat çekmektedir. Bu çalışmada da mavi beyaz döneminde üretilen seramiklerde kullanılan motifler, renkler ve form özellikleri
incelenerek, dönemin siyasi ve kültürel ilişkileri sonucu uzak diyarlardan Türk topraklarına kadar gelmeyi başaran Çin porselenlerinin Osmanlı seramik sanatına olası etkileri incelenmiştir. Porselen ve seramik üretim tekniği açısından
oldukça büyük farklılıklar taşımasına karşın süslemede kullanılan motiflerin ve renklerin birbirlerine olan benzerlikleri aynı temelden geldikleri düşüncesinin oluşmasına neden olsa da iki üretim tekniği hammaddesi topraktan itibaren
birbirine büyük farklılıklar gösterir. Çamur yapılarının sertliği, şekillendirme yöntemleri, pişirim süreleri ve sıcaklıkları farklı köklerden geldiklerini açıkça ifade etmektedir. Dünya’da ticaretin gelişmesi ve ticaret yollarının
gitgide daha da büyümesiyle coğrafyalar arasında yükselen kültür alışverişi süsleme ve sanat alanında da etkilerini arttırmasıyla dolaylı olarak hem Çin porselenlerinde hem de Osmanlı seramiklerinde benzer süsleme eğilimlerinin
oluşmasına sebep olmuştur. Çalışmada, bahsi geçen benzerliklerin görülebildiği eserler birebir karşılaştırılarak aralarındaki ilişkinin incelenmesi amaçlanmıştır.
Home Accidents among Children Aged 0-6 Years During the COVID-19 Pandemic and Related Factors: The Case of Turkey
Authors: ÇİÇEK Birgül , ŞAHİN Hande , ERKAL Sibel
Published: September 2022

Bu araştırmada, Covid-19 salgın döneminde 0-6 yaş grubu çocukların ev kazası geçirme durumları ve ilişkili faktörler açısından incelenmesi amaçlanmıştır. Araştırmanın çalışma grubunu tüm çocukları 0-6 yaş grubunda olan, Covid-19 salgın
sürecinde evden ya da esnek çalışma sistemiyle çalışan, farklı sosyo demografik özelliklere sahip, çalışmaya katılmayı gönüllü olarak kabul eden 540 ebeveyn oluşturmaktadır. Ayrıca kaza ile ilişkili faktörlerin incelenmesinde ise
çocukların yaşadığı 134 ev kazasının verilerinden yararlanılmıştır. Bu çalışma, Hacettepe Üniversitesi Etik Komisyonu tarafından 8 Haziran 2021 tarihinde yapılan toplantıda (Sayı: E- 35853172) etik açıdan uygun bulmuştur. Araştırma
verileri, araştırmacılar tarafından hazırlanmış anket formu ile elde edilmiştir. Hazırlanan anket formunun ilk bölümünde ebeveynlerin sosyo-demografik bilgilerini, ikinci bölümde ev kazası geçiren çocuklara ilişkin bilgiler ile
yaşanılan eve ilişkin özellikleri belirlemeye yönelik sorular bulunmaktadır. Son bölümde ise Turan, Altundağ-Dündar, Yorgancı ve Yıldırım (2010) tarafından oluşturulan 20 maddelik evlerin ev kazası açısından durumunu ortaya koyan
“ev kazası güvenlik testi” kullanılmıştır. Araştırma sonuçlarına göre; Covid-19 salgın döneminde 0-6 yaş çocukların karşılaştığı 134 (%24.8) ev kazasının %58,2’sinin erkek çocukları tarafından yaşandığı, düşme kazalarının ilk sırada
geldiği, ev kazası geçiren çocukların yarıdan biraz fazlasının (%54,5) oturma odasında kaza geçirdiği belirlenmiştir. Araştırma kapsamına alınan ebeveynlerin ev kazası güvenlik testi puanlarının 0-6 yaş çocukların Covid-19 salgın
döneminde ev kazası geçirme durumu, ebeveynlerin ev kazaları ile ilgili bilgilendirme/eğitim alma durumu ve sahip olunan çocuk sayısı açısından incelendiğinde istatistiksel olarak anlamlı bir fark tespit edilmiştir (p<0,05)
Elde edilen bulgular, salgın öncesi ve salgın döneminde yapılan çalışmalar ile tartışılmış, salgın döneminde çocuklarda yaşanabilecek ev kazalarının önlenmesi amacıyla açısından bireylere, ilgili kurum ve kuruluşlara önerilerde
bulunulmuştur. Salgın döneminde konu ile ilgili az sayıda akademik çalışmalara rastlanıldığından; bu çalışmanın alan yazındaki boşluğu doldurarak alana katkı sağlayacağı, konu ile ilgili yapılacak benzer çalışmalara öncülük edeceği
düşünülmektedir.
Waste Ceramics and Sustainability in Ceramic Art: Evaluation of Broken Ceramics Unearthed in Archaeological Excavations and Without Inventory
Authors: SEVİM S.Sibel , KARACALAR Şule
Published: September 2022

Seramik, insan hayatında ilk çağlardan beri var olmuş, kap-kacak, çanak-çömlek üretimleri ile başlayarak günümüze değin gelişerek devam etmiştir. Bu üretimlerden kalan seramik kalıntıları uzmanlar tarafından arkeolojik buluntularda
ortaya çıkarılmaktayken, aynı zamanda günümüz seramik sektöründe de üretim büyük hızla devam etmektedir. Günümüzde farklı üretimlerden kaynaklanan birçok atık seramiğe rastlanmaktadır ve bu atık seramiklerin bir kısmı heba olurken
geçmişimizden kalan bir kısım seramiklerde arkeolojik kazılarda olduğu gibi yer altında ve müze depolarında muhafaza edilmektedir. Hem günümüz üretimindeki atık seramikler hem de arkeolojik kazılarda ortaya çıkmaya devam eden kırık
seramik buluntular gittikçe çoğalmaktadır. Buradaki temel soruna uygulanabilecek en verimli çözüm yolu, günümüzdeki atık seramiklere ve arkeolojik kazılarda ortaya çıkan kırık seramiklere sürdürülebilir bir sanat anlayışla yaklaşmaktır.
Son zamanlarda atık seramiklerin sürdürülebilirlik kavramıyla yeniden hayata geçirilmesi amaçlanarak bu doğrultuda ülkemizde ve dünyada birçok örnek uygulanmaktadır. Bu örneklere eklenebilecek diğer bir konu da arkeolojik kazılarda
ortaya çıkan kırık seramiklerin sürdürülebilir bir sanatsal anlayışla değerlendirilmesidir. Bu çalışmada, arkeolojik kazılarda ortaya çıkan etütlük ve envanterlik olmayan kırık seramik parçalarına sürdürülebilir üretim anlayışıyla
yaklaşarak, söz konusu kırık seramik parçaların çağdaş sanatsal bir tavırla yeniden hayata geçirilmesi amaçlanmıştır. Bu bağlamda müze müdürleri, sanat tarihçileri ve arkeologlarla iletişime geçilerek fikirleri alınmış ve bu kırık
seramik parçalara, kültür mirası bakış açısıyla yaklaşarak tasarımlar oluşturulmuştur. Böylece kültür mirasımız olan atıl durumdaki kırık seramik parçaların, gelecek nesillerle buluşturulması ve geçmişle gelecek arasında bir köprü
kurularak ülkemize büyük katkı sağlaması umulmaktadır. Ülkemize ve gelecek nesillere kazandırılması elzem olan bu problemin çözümünde başrol elbette ki seramik sanatçılarının olması gerekliliği savunulmuştur. Bu bağlamda seramik
sanatçılarının belirli dönemlerde bir araya getirilerek söz konusu kırık seramik parçaların kullanılacağı çalıştaylar, sempozyumlar, worhshoplar ve sergiler düzenlenmesi ve çağdaş sanatsal seramik formların oluşturularak toplumla
buluşturulması planlanmaktadır.
Bisalbuminemia: An Uncommon Finding on Serum Electrophoresis
Authors: Dhavale Archana , Bokankar Deepak , Argade Sarika , Kale Bhagwat
Published: September 2022

Bisalbuminemia is a rare finding, characterised by the presence of two albumin fraction on serum protein electrophoresis. The disorder can either be inherited in autosomal dominant pattern or acquired. Acquired bisalbuminemia have discovered in various pathological conditions like diabetes mellitus, multiple myeloma, alzheimer’s disorder, sarcoidosis, nephrotic syndrome, chronic kidney disease, pancreatic pseudocyst and in patient receiving high doses of penicillin. Hereby, authors reports an uncommon case of a 55-years-old male, who presented with symptoms of lower back pain since 4 month. X-ray skull shows multiple lytic lesions. Bone marrow aspirate was hypercellular and showed 60% plasma cells. Patient was diagnosed with multiple myeloma and was sent for further biochemical investigations. Serum protein electrophoresis showed two distinct bands in the albumin region and a prominent M peak in gamma globulin region. The band may be mistaken as an abnormal globulin peak specifically while screening suspected or confirmed cases of monoclonal gammopathies.
Injective envelopes and the intersection property
Authors:   Department of Mathematics, University of Copenhagen, Copenhagen, 2100, Denmark, Bryder Rasmus Sylvester
Published: September 2022

We consider the ideal structure of a reduced crossed product of a unital C∗-algebra equipped with an action of a discrete group. More specifically we find sufficient and necessary conditions for the group action to have the intersection property, meaning that non-zero ideals in the reduced crossed product restrict to non-zero ideals in the underlying C∗-algebra. We show that the intersection property of a group action on a C∗-algebra is equivalent to the intersection property of the action on the equivariant injective envelope. We also show that the centre of the equivariant injective envelope always contains a C∗-algebraic copy of the equivariant injective envelope of the centre of the injective envelope. Finally, we give applications of these results in the case when the group is C∗-simple.
A rigidity result for normalized subfactors
Authors:   Institut fuer Geometrie, Technische Universitaet Dresden, 01062 Dresden, Germany, Alekseev Vadim , Brugger Rahel ,   nstitut fuer Geometrie, Technische Universitaet Dresden, 01062 Dresden, Germany
Published: September 2022

We show a rigidity result for subfactors that are normalized by a representation of a lattice Γ in a higher rank simple Lie group with trivial center into a finite factor. This implies that every subfactor of LΓ which is normalized by the natural copy of Γ is trivial or of finite index.
On isometries with finite spectrum
Authors:   Department of Mathematical Sciences, University of Memphis, Memphis, TN 38152, U.S.A., Botelho Fernanda , Ilisevic Dijana ,   Department of Mathematics, Faculty of Science, University of Zagreb, Zagreb, 10000, Croatia
Published: September 2022

In this paper we investigate inverse eigenvalue problems for finite spectrum linear isometries on complex Banach spaces. We establish necessary conditions on a finite set of modulus one complex numbers to be the spectrum of a linear isometry. In particular, we study periodic linear isometries on the large class of Banach spaces X with the following property: if T:X→X is a linear isometry with two-point spectrum {1,λ} then λ=−1 or the eigenprojections of T are Hermitian.
Compact Hankel operators with bounded symbols
Authors:   Department of Mathematics and Statistics, University of Reading, Whiteknights Campus, Reading RG6 6AX, U.K., Hagger Raffael , Virtanen Jani A. ,   Department of Mathematics and Statistics, University of Reading, Whiteknights Campus, Reading RG6 6AX, U.K.
Published: September 2022

We give a new proof of the result that the Hankel operator Hf with a bounded symbol is compact on standard weighted Fock spaces F2α(Cn) if and only if H¯¯¯f is compact. Our proof uses limit operator techniques and extends to Fpα(Cn) when $1
Representations of Cuntz algebras associated to random walks on graphs
Authors:   Department of Mathematics, Louisiana State University, Baton Rouge, LA 70803-4918, U.S.A., Christoffersen Nicholas J. , Dutkay Dorin Ervin ,   Department of Mathematics, University of Central Florida, 4000 Central Florida Blvd., P.O. Box 161364, Orlando, FL 32816-1364, U.S.A.
Published: September 2022

Motivated by the harmonic analysis of selfaffine measures, we introduce a class of representations of the Cuntz algebra associated to random walks on graphs. The representations are constructed using the dilation theory of row coisometries. We study these representations, their commutant and the intertwining operators.
Hilbert space operators with two-isometric dilations
Authors:   Universite Lille, CNRS, UMR 8524 - Laboratoire Paul Painleve, France, Badea Catalin , Suciu Laurian ,   Department of Mathematics and Informatics, ``Lucian Blaga'' University of Sibiu, Roumania
Published: September 2022

A continuous linear Hilbert space operator S is said to be a 2-isometry if the operator S and its adjoint S∗ satisfy the relation S∗2S2−2S∗S+I=0. We study operators having liftings or dilations to 2-isometries. The adjoint of an operator which admits such liftings is the restriction of a backward shift on a Hilbert space of vector-valued analytic functions. These results are applied to concave operators and to operators similar to contractions. Two types of liftings to 2-isometries, as well as the extensions induced by them, are constructed and isomorphic minimal liftings are discussed.