Sistema fotovoltaico conectado à rede com baterias sistema UFPE-Brasil

Esto trabajo presenta una discusión sobre los datos experimentales del estudio del desempeño de lo SFCRUFPE en operación con almacenamiento de energía. Los resultados obtenidos expresos en medias diarias y mensuales: Energía solar total producida, consumo eléctrico total, contribución solar en el consumo y la energía solar injertada e la red, apuntan que las condiciones de operación generador / inversor son muy importantes en SFCR con acumuladores de baterías. La utilización de acumuladores, necesaria en algunas situaciones como back-up, puede proporcionar acrecimos o decrecimos en la contribución solar en el consumo del usuario en función del modo operacional establecido. En algunas situaciones la cuenta de energía del consumidor puede crecer gracias al aumento de la demanda inversor / batería. El consumo de energía por el acumulador y por el inversor para su propio funcionamiento puede ser mucho mayor en la relación a la energía producida por el generador fotovoltaico, sobretodo cuando el factor de dimensión del inversor nos es adecuado.This work presents an evaluation of the monitored data of a grid connected system with battery installed in the Federal University of Pernambuco (1.28 kWp). The battery can be charging for photovoltaic system or by electrical network. The traditional parameters are being monitored: solar resource, battery bank tension and current, current in the photovoltaic generator and solar electrical energy produced. The following data was determined: daily average and daily monthly average solar irradiation in the horizontal and in the generator plane; the electrical current of the photovoltaic modules with the incident irradiation on the his plane; electrical energy produced of solar origin, electrical energy of solar origin injected into the network, consumed electrical energy, parcels of solar/conventional contribution. The results show that: the inverter operation conditions are very important in the situation with battery. The charge time period is programmed and monitored for the inverter. The solar energy contribution decreases if the battery charge time period is inadequate. The consumption energy inverter for his own operation and for charge the battery was very large relative to active power produced for the generator.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Sistema fotovoltaico conectado à rede com baterias sistema UFPE-Brasil

Esto trabajo presenta una discusión sobre los datos experimentales del estudio del desempeño de lo SFCRUFPE en operación con almacenamiento de energía. Los resultados obtenidos expresos en medias diarias y mensuales: Energía solar total producida, consumo eléctrico total, contribución solar en el consumo y la energía solar injertada e la red, apuntan que las condiciones de operación generador / inversor son muy importantes en SFCR con acumuladores de baterías. La utilización de acumuladores, necesaria en algunas situaciones como back-up, puede proporcionar acrecimos o decrecimos en la contribución solar en el consumo del usuario en función del modo operacional establecido. En algunas situaciones la cuenta de energía del consumidor puede crecer gracias al aumento de la demanda inversor / batería. El consumo de energía por el acumulador y por el inversor para su propio funcionamiento puede ser mucho mayor en la relación a la energía producida por el generador fotovoltaico, sobretodo cuando el factor de dimensión del inversor nos es adecuado.This work presents an evaluation of the monitored data of a grid connected system with battery installed in the Federal University of Pernambuco (1.28 kWp). The battery can be charging for photovoltaic system or by electrical network. The traditional parameters are being monitored: solar resource, battery bank tension and current, current in the photovoltaic generator and solar electrical energy produced. The following data was determined: daily average and daily monthly average solar irradiation in the horizontal and in the generator plane; the electrical current of the photovoltaic modules with the incident irradiation on the his plane; electrical energy produced of solar origin, electrical energy of solar origin injected into the network, consumed electrical energy, parcels of solar/conventional contribution. The results show that: the inverter operation conditions are very important in the situation with battery. The charge time period is programmed and monitored for the inverter. The solar energy contribution decreases if the battery charge time period is inadequate. The consumption energy inverter for his own operation and for charge the battery was very large relative to active power produced for the generator.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Transport of Non-classical Light Mediated by Topological Domain Walls in a SSH Photonic Lattice

Advancements in photonics technologies have significantly enhanced their capability to facilitate experiments involving quantum light, even at room temperature. Nevertheless, fully integrating photonic chips that include quantum light sources, effective manipulation and transport of light minimizing losses, and appropriate detection systems remains an ongoing challenge. Topological photonic systems have emerged as promising platforms to protect quantum light properties during propagation, beyond merely preserving light intensity. In this work, we delve into the dynamics of non-classical light traversing a Su-Schrieffer-Heeger photonic lattice with topological domain walls. Our focus centers on how topology influences the quantum properties of light as it moves across the array. By precisely adjusting the spacing between waveguides, we achieve dynamic repositioning and interaction of domain walls, facilitating effective beam-splitting operations. Our findings demonstrate high-fidelity transport of non-classical light across the lattice, replicating known results that are now safeguarded by the topology of the system. This protection is especially beneficial for quantum communication protocols with continuous variable states. Our study enhances the understanding of light dynamics in topological photonic systems and paves the way for high-fidelity, topology-protected quantum communication

South American Expert Roundtable : increasing adaptive governance capacity for coping with unintended side effects of digital transformation

This paper presents the main messages of a South American expert roundtable (ERT) on the unintended side effects (unseens) of digital transformation. The input of the ERT comprised 39 propositions from 20 experts representing 11 different perspectives. The two-day ERT discussed the main drivers and challenges as well as vulnerabilities or unseens and provided suggestions for: (i) the mechanisms underlying major unseens; (ii) understanding possible ways in which rebound effects of digital transformation may become the subject of overarching research in three main categories of impact: development factors, society, and individuals; and (iii) a set of potential action domains for transdisciplinary follow-up processes, including a case study in Brazil. A content analysis of the propositions and related mechanisms provided insights in the genesis of unseens by identifying 15 interrelated causal mechanisms related to critical issues/concerns. Additionally, a cluster analysis (CLA) was applied to structure the challenges and critical developments in South America. The discussion elaborated the genesis, dynamics, and impacts of (groups of) unseens such as the digital divide (that affects most countries that are not included in the development of digital business, management, production, etc. tools) or the challenge of restructuring small- and medium-sized enterprises (whose service is digitally substituted by digital devices). We identify specific issues and effects (for most South American countries) such as lack of governmental structure, challenging geographical structures (e.g., inclusion in high-performance transmission power), or the digital readiness of (wide parts) of society. One scientific contribution of the paper is related to the presented methodology that provides insights into the phenomena, the causal chains underlying “wanted/positive” and “unwanted/negative” effects, and the processes and mechanisms of societal changes caused by digitalization

EXPROPRIAÇÕES, SOFRIMENTOS, LUTAS E ESPERANÇAS: BREVES REFLEXÕES SOBRE A QUESTÃO AGRÁRIA BRASILEIRA

Este trabalho tem como principal objetivo refletir sobre a questão agrária no Brasil. Para isso, atenta-se para o histórico de expropriações e sofrimentos que marcam a vida dos trabalhadores do campo no país, bem como para as lutas e esperanças destes, que anseiam pelo direito a um pedaço de terra e, assim, poder ter uma vida mais digna, caracterizada por tranqüilidade e qualidade. As discussões colocadas no trabalho são decorrentes de algumas pesquisas bibliográficas, em livros, periódicos e sites da internet, sobre o assunto. Além disso, colocam-se em tela versos de poesia popular que retratam a questão, como também ilustrações da vida dos trabalhadores sem-terra em acampamentos localizados em margens de estradas no Estado do Rio Grande do Norte, à espera de um pedaço de chão que encontra-se atualmente improdutivo, para produzir a sua subsistência. A postura metodológica adotada nas reflexões do trabalho é a crítica. PALAVRAS-CHAVE: Questão agrária brasileira. Expropriações. Lutas. Reforma agrária. Esperanças

Serum and Salivary IgE, IgA, and IgG4 Antibodies to Dermatophagoides pteronyssinus and Its Major Allergens, Der p1 and Der p2, in Allergic and Nonallergic Children

Allergic rhinitis (AR) is a public health problem with high prevalence worldwide. We evaluated levels of specific IgE, IgA, and IgG4 antibodies to the Dermatophagoides pteronyssinus (Dpt) house dust mite and to its major allergens (Der p1 and Der p2) in serum and saliva samples from allergic and nonallergic children. A total of 86 children were analyzed, from which 72 had AR and 14 were nonallergic healthy children. Serum IgE and serum/salivary IgG4 levels to Dpt, Der p1, and Der p2 were higher in allergic children whereas serum/salivary IgA levels to all allergens were higher in nonallergic children. IgE levels positively correlated with IgG4 and IgA to all allergens in allergic children, while IgA levels negatively correlated with IgG4 to Dpt and Der p1 in nonallergic children. In conclusion, mite-specific IgA antibodies predominate in the serum and saliva of nonallergic children whereas mite-specific IgE and IgG4 are prevalent in allergic children. The presence of specific IgA appears to have a key role for the healthy immune response to mucosal allergens. Also, specific IgA measurements in serum and/or saliva may be useful for monitoring activation of tolerance-inducing mechanisms during allergen specific immunotherapeutic procedures, especially sublingual immunotherapy

Elucidating how the saprophytic fungus Aspergillus nidulans uses the plant polyester suberin as carbon source

Lipid polymers in plant cell walls, such as cutin and suberin, build recalcitrant hydrophobic protective barriers. Their degradation is of foremost importance for both plant pathogenic and saprophytic fungi. Regardless of numerous reports on fungal degradation of emulsified fatty acids or cutin, and on fungi-plant interactions, the pathways involved in the degradation and utilisation of suberin remain largely overlooked. As a structural component of the plant cell wall, suberin isolation, in general, uses harsh depolymerisation methods that destroy its macromolecular structure. We recently overcame this limitation isolating suberin macromolecules in a near-native state.work partially supported by a grant from Iceland, Liechtenstein and Norway through the EEA financial mechanism (Project PT015), FCT: grant (PEst-OE/EQB/LA0004/2013) and fellowships (SFRH/BD/38378/2007, SFRH/BD/66396/2009, SFRH/BD/66030/2009, SFRH/BD/48286/2008), Fundação Calouste Gulbenkian fellowship (21-95587-B)