Posicionamento em ambientes internos com dispositivos wi-fi de baixo custo

O ritmo de desenvolvimento da pesquisa ligada ao rastreamento de localização está altamente vinculado com o avanço da rede de sensores sem fio e tecnologias sem fio, sendo explorado em muitas áreas. Um exemplo clássico é o Sistema de Posicionamento Global (GPS), onde satélites são usados para enviar sinais para receptores na Terra que usam estes sinais para computar informações de navegação. Entretanto, como a comunicação entre os satélites e receptores GPS exige a propagação de rádio em linha de visada, o sistema GPS geralmente só funciona em ambientes externos. Para o crescente interesse em pesquisas para rastreamento de posição em ambientes internos (indoor), é preciso utilizar dispositivos sem fio baseados em tecnologia Bluetooth ou Wi-Fi (IEEE 802.11). O objetivo deste trabalho é mostrar o desenvolvimento de aplicações utilizando novos dispositivos Wi-Fi (ESP8266) para a estimativa de posicionamento e localização em ambientes internos (indoor)

Remote lab of robotic manipulators through an open access ROS-based platform

The research, training, and learning in robotic systems is a difficult task for institutions that do not have an appropriate equipment infrastructure, mainly due to the high investment required to acquire these systems. Possible alternatives are the use of robotic simulation platforms and the creation of remote robotic environments available for different users. The use of the last option surpasses the former one in terms of the possibility to handle real robotic systems during the training process. However, technical challenges appear in the management of the supporting infrastructure to use the robotic systems, namely in terms of access, safety, security, communication, and programming aspects. Having this in mind, this paper presents an approach for the remote operation of real robotic manipulators under a virtual robotics laboratory. To this end, an open access and safe web-based platform was developed for the remote control of robotic manipulators, being validated through the remote control of a real UR3 manipulator. This platform contributes to the research and training in robotic systems among different research centers and educational institutions that have limited access to these technologies. Furthermore, students and researchers can use this educational tool that differs from traditional robotic simulators through a virtual experience that connects real manipulators worldwide through the Internet.The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds FCT/MCTES (PIDDAC) to CeDRI (UIDB/05757/2020 and UIDP/05757/2020), and SusTEC (LA/P/0007/2021).info:eu-repo/semantics/publishedVersio

CONHECIMENTO ETNOBIOLÓGICO DE UMA COMUNIDADE RURAL COMO FONTE DE INFORMAÇÃO PARA MATERIAL INFORMATIVO-EDUCATIVO

A Etnobiologia é uma área interdisciplinar que busca analisar e estudar a forma como determinadas culturas interagem com o meio biológico, tendo como princípio a valorização dos conhecimentos culturais. Os estudos etnobiológicos e das percepções ambientais podem ser úteis para a elaboração de projetos de educação ambiental mais contextualizados. Dessa maneira, o presente trabalho teve por objetivo realizar um levantamento dos conhecimentos etnobiológicos de moradores da Vila Rural Dezenove de Dezembro, município de Alto Piquiri, noroeste do Paraná, Brasil. Além disso, o trabalho teve por objetivo criar um material informativo educativo que considera os saberes locais. Inicialmente, fez-se uma revisão bibliográfica sobre a localidade, seguida de entrevistas narrativas utilizando-se as metodologias de bola de neve e o conceito de saturação. O material das entrevistas foi estudado com base na Análise Textual Discursiva. Como resultado, os moradores entrevistados listaram diversos animais silvestres, sendo que muitos demonstram uma interação afetiva com determinadas espécies, principalmente com os passarinhos. No entanto, foi possível perceber certa repulsa e alguns conflitos em relação às serpentes. Ficou evidente que os entrevistados tinham consciência dos impactos da ação antrópica sobre a localidade onde vivem. Porém, essa percepção, muitas vezes, é tida afastada da esfera pessoal, com uma postura mais reativa que propositiva. Notou-se, ainda, que há vários elementos culturais, tais como crendices e causos a respeito da fauna. Com base nas entrevistas e no levantamento bibliográfico realizado, foi elaborada uma cartilha educativo-informativa. Esse material buscou fortalecer o sentimento de pertencimento, valorizar o conhecimento local, mas também esclarecer alguns pontos que possam levar a conflitos com a fauna. Dessa maneira, procurou-se construir um material de educação ambiental a partir do contexto local, valorizando seus aspectos culturais

O programa Rio Rural no estado do Rio de Janeiro: a experiência na microbacia canal Jurumirim, município de Macaé

The microbasin is a geographical unit bounded by a drainage network (small rivers) that lead to a main river. The Rio Rural program is a financial one and utilizes participative methodology. In the beginning of the process members of the microbasin join together in interest related groups to elect their representatives to compose the so called Microbasin Manager Committee, the COGEM, which will follow the executor technician during all the program phases, even control. Various practices are supported, among them there is water spring protection. The community in this study is Prefeito Celso Daniel settlement, which has 204 families. 35 PIDs (Individual Development Plans) have been made and near R$89.098,00 financed split in 38 subprojects. In general, it was observed that the community is satisfied with the financial incentive given by the program. The sense of environmental gain is high enough, as well as the anxiety of the people involved that everyone accesses it for the number of families is high. The biggest problem faced nowadays is the beneficiaries that are current out of stipulated deadline for the accountability and subprojects implementing.Do ponto de vista físico, microbacia hidrográfica é uma unidade geográfica delimitada por uma rede de drenagem (córregos) que deságua em um rio principal. O Rio Rural é um programa de financiamento que usa a metodologia participativa para sua implementação. No início do processo os membros da microbacia se reúnem em grupos de interesse elegendo seus representantes para comporem o chamado Comitê Gestor da Microbacia, o COGEM, que acompanhará o técnico executor em todas as fases do programa, até o controle. Várias práticas são incentivadas, entre elas a Proteção de nascentes (isolamento com cerca); A comunidade trabalhada nesse estudo é o Assentamento Prefeito Celso Daniel, que possui 204 famílias. Já foram elaborados 35 PIDs (Planos Individuais de Desenvolvimento) e liberados aproximadamente R$ 89.098,00 em recursos, com incentivo de 38 subprojetos. Se observou que de modo geral a comunidade encontra-se satisfeita com o incentivo financeiro proporcionado pelo programa. A percepção do ganho ambiental é bastante alta, bem como ansiedade dos envolvidos em que todos sejam contemplados pois o número de famílias é alto. O maior problema atualmente são os beneficiários que se encontram com as prestações de contas e implantação dos projetos fora dos prazos estipulados

Molecularly Imprinted Polymer-Based Electrochemical Sensing in Protein Detection

Protein detection is paramount across various scientific, clinical, and industrial domains. Accurate and sensitive detection of proteins is pivotal for understanding biological processes, diagnosing diseases, drug development, environmental monitoring, and ensuring food safety. Traditional protein detection methods encounter sensitivity, specificity, and ease of use challenges. Molecularly imprinted polymers (MIPs), with their tailored molecular recognition sites, offer a novel approach to address these limitations. When combined with electrochemical techniques, MIP-based electrochemical methods have emerged as a revolutionary technology, showcasing enhanced sensitivity and selectivity. This article provides a comprehensive overview of MIP-based electrochemical methods for protein detection, including the principles, engineering aspects, advantages, and potential applications. The aim is to elucidate the potential of this cutting-edge technology in reshaping protein detection and its promising role in advancing biosensing technologies

EFFECT OF MYCORRHIZAL INOCULATION AND SUBSTRATE COMPOSITION ON SEEDLING GROWTH OF TWO ATLANTIC FOREST TREE SPECIES

The search for more efficient biotechnological tools for forest regeneration has increased over the past decades. Mycorrhizal inoculation is a valuable strategy to promote seedling growth, but its efficiency depends on the substrate used. This study aimed to investigate the effects of arbuscular mycorrhizal fungal inoculation and different types of substrates on the growth of Pseudobombax grandiflorum and Apuleia leiocarpa seedlings. Experiments were carried out under greenhouse conditions in a completely randomized 6 × 2 factorial design (six substrates and two inoculation levels) with six replications of 12 treatments. Both species showed similar growth patterns. Plants grown in inoculated substrates composed of 70% Cambisol and 30% bovine manure or 80% Cambisol and 20% Biomix showed improved nutritional status. These substrates had good physical and chemical characteristics (pH and P and N levels), which favored plant development and mycorrhizal symbiosis. P. grandiflorum seedlings showed enhanced growth in inoculated substrate composed of 80% Cambisol and 20% Biomix and in inoculated Cambisol fertilized with P. For A. leiocarpa, the best results were observed for seedlings grown in inoculated substratescomposed of 80% Cambisol and 20% Biomix, 70% Cambisol and 30% bovine manure, or Cambisol fertilized with P

Effects of a novel calcium aluminate cement on the early events of the progression of osteogenic cell cultures

The present study evaluated the progression of osteogenic cell cultures exposed to a novel calcium aluminate cement (CAC+) in comparison with the gold standard mineral trioxide aggregate (MTA). Cells were enzimatically isolated from newborn rat calvarial bone, plated on glass coverslips containing either CAC+ or a control MTA samples in the center, and grown under standard osteogenic conditions. Over the 10-day culture period, roundening of sample edges was clearly noticed only for MTA group. Although both cements supported osteogenic cell adhesion, spreading, and proliferation, CAC+-exposed cultures showed significantly higher values in terms of total cell number at days 3 and 7, and total protein content and alkaline phosphatase activity at day 10. The present in vitro results indicate that the exposure to CAC+ supports a higher differentiation of osteogenic cells compared with the ones exposed to MTA. Further experimental studies should consider CAC+ as a potential alternative to MTA when the repair of mineralized tissues is one of the desired outcomes in endodontic therapy.O objetivo do presente estudo foi avaliar a progressão de cultura de células osteogênicas expostas a um novo cimento de aluminato de cálcio (CAC+) em comparação ao agregado de trióxido mineral (MTA). As células foram obtidas por digestão enzimática de calvária de ratos recém-nascidos, plaqueadas sobre lamínulas de vidro contendo em sua área central discos de CAC+ ou MTA e crescidas em condições osteogênicas por até 10 dias. Durante a cultura primária, observou-se o arredondamento das bordas das amostras de cimento apenas para MTA. Embora ambos os cimentos tenham permitido a adesão, o espraiamento e a proliferação celulares, as culturas crescidas em contato com CAC+ exibiram valores maiores de número total de células em 3 e 7 dias, e de conteúdo de proteína total e atividade de fosfatase alcalina em 10 dias. Os resultados indicam que a exposição ao CAC+ permite o desenvolvimento de uma proporção maior de células em estágios mais avançados da diferenciação osteoblástica, quando comparado ao MTA. Deve-se considerar em futuros estudos experimentais a utilização do CAC+ como um material alternativo ao MTA especialmente quando um dos objetivos do tratamento endodôntico é o de reparação dos tecidos mineralizados da região periapical.(FAPESP) São Paulo Research Foundation(CNPq) National Council of Scientific and Technological Developmen

Analysis of motor capacities in the maturational stages of female adolescents

Introduction: Maturation is a biological phenomenon inherent to the human being that acts alongside environmental factors in its relationship with the development of children and adolescents.Objective: To analyse the motor skills during maturational stages of female adolescents.Methods: This study included 133 female adolescents aged between 10 and 17 years from federal schools in the city of Rio Branco, State of Acre, Brazil. Sexual maturation was evaluated using Tanner’s self-assessment. Motor skills were assessed using the following tests: strength (Jump Test); coordination (Burpee Test); balance (Flamingo Test); flexibility (Sit and Reach Test); agility (Shuttle Run Test). The data were analysed using R software through analysis of variance. The significance level was fixed at 5%.Result: No significant statistical results were found for strength, agility, balance and flexibility, evidencing that maturational advances did not influence these skills. In the coordination variable, significant results were obtained.Conclusion: The results of this study suggest that maturational advancement in adolescents does not influence strength, agility, balance or flexibility. However, it does influence coordination, presenting better performance at stage P2.Introduction: Maturation is a biological phenomenon inherent to the human being that acts alongside environmental factors in its relationship with the development of children and adolescents.Objective: To analyse the motor skills during maturational stages of female adolescents.Methods: This study included 133 female adolescents aged between 10 and 17 years from federal schools in the city of Rio Branco, State of Acre, Brazil. Sexual maturation was evaluated using Tanner’s self-assessment. Motor skills were assessed using the following tests: strength (Jump Test); coordination (Burpee Test); balance (Flamingo Test); flexibility (Sit and Reach Test); agility (Shuttle Run Test). The data were analysed using R software through analysis of variance. The significance level was fixed at 5%.Result: No significant statistical results were found for strength, agility, balance and flexibility, evidencing that maturational advances did not influence these skills. In the coordination variable, significant results were obtained.Conclusion: The results of this study suggest that maturational advancement in adolescents does not influence strength, agility, balance or flexibility. However, it does influence coordination, presenting better performance at stage P2