Optimal Analysis for the Enhancement in the Thermal Variables Measurement by Smart and Modular Solid State Sensors

The proposed research aims to analyze and optimize the measurement of thermal physical variables during the operation of a hydrogen combustion engine. The optimal measurement of the flow, temperature, pressure, and volume is given over the hydrogen, which is the main fuel of the studied combustion motor. Hence, the success of the measurement is based on the polynomial analysis of the combustion motor operation, which needs nonlinear algorithms to get the optimal correlation of the measured physical variables as well as a high robustness and short response time during the transduction of the measured physical variable, which is achieved as a consequence of the anodic aluminum oxide (AAO) amorphous nanostructures properties that are modular solid state integration of the designed smart sensor. The short response time and high robustness is a good advantage for the designed smart sensor since it gives more time to execute sophisticated algorithms in order to get the optimal physical variables measurement. In fact, the proposed smart sensor keeps the possibility to be modular and solid state for the interaction with the hydrogen fuel as well as recognizing the presence of other molecules mixed in the fluid, which can alarm the user who is able to recognize whether it is joined oxygen or carbon residues. Therefore, the proposed research work toward a good compromise to care for the environment condition based on a cleaner combustion motor operation

Code assessment and modelling for Design Basis Accident Analysis of the European sodium fast reactor design. Part I: System description, modelling and benchmarking

The new reactor concepts proposed in the Generation IV International Forum (GIF) are conceived to improve the use of natural resources, reduce the amount of high-level radioactive waste and excel in their reliability and safe operation. Among these novel designs sodium fast reactors (SFRs) stand out due to their technological feasibility as demonstrated in several countries during the last decades. As part of the contribution of EURATOM to GIF the CP-ESFR is a collaborative project with the objective, among others, to perform extensive analysis on safety issues involving renewed SFR demonstrator designs. The verification of computational tools able to simulate the plant behaviour under postulated accidental conditions by code-to-code comparison was identified as a key point to ensure reactor safety. In this line, several organizations employed coupled neutronic and thermal-hydraulic system codes able to simulate complex and specific phenomena involving multi-physics studies adapted to this particular fast reactor technology. In the “Introduction” of this paper the framework of this study is discussed, the second section describes the envisaged plant design and the commonly agreed upon modelling guidelines. The third section presents a comparative analysis of the calculations performed by each organisation applying their models and codes to a common agreed transient with the objective to harmonize the models as well as validating the implementation of all relevant physical phenomena in the different system codes

Gold(I)-Catalyzed Coupling Reactions for the Synthesis of Diverse Small Molecules Using the Build/Couple/Pair Strategy

The build/couple/pair strategy has yielded small molecules with stereochemical and skeletal diversity by using short reaction sequences. Subsequent screening has shown that these compounds can achieve biological tasks considered challenging if not impossible (‘undruggable’) for small molecules. We have developed gold(I)-catalyzed cascade reactions of easily prepared propargyl propiolates as a means to achieve effective intermolecular coupling reactions for this strategy. Sequential alkyne activation of propargyl propiolates by a cationic gold(I) catalyst yields an oxocarbenium ion that we previously showed is trapped by C-based nucleophiles at an extrannular site to yield α-pyrones. Here, we report O-based nucleophiles react by ring opening to afford a novel polyfunctional product. In addition, by coupling suitable building blocks, we subsequently performed intramolecular pairing reactions that yield diverse and complex skeletons. These pairing reactions include one based on a novel aza-Wittig-6π-electrocyclization sequence and others based on ring-closing metathesis reactions.Chemistry and Chemical Biolog

Theorical analysis to explain the slow acceptance of the recent residential vertical trends in San José, Costa Rica

O artigo tem como objetivo avaliar o surgimento e evolução do mercado imobiliário costarriquenho com o intuito de desvendar o contexto do forte vínculo com a terra e, por conseguinte, propor uma explicação ao lento aceite das novas tendências residenciais verticais. A metodologia consiste em pesquisas de campo anuais entre 2011 e 2017, revisão de fotografias e uma revisão bibliográfica de autores marxistas costarriquenhos, brasileiros e internacionais, com a intenção de formular uma discussão teórica para mostrar como as mudanças nos modos de produção e na economia local fortaleceram a relação entre a população e sua terra. Utiliza-se um amplo recorte temporal desde o período colonial até a atualidade com o intuito de analisar como, ao longo da evolução do mercado imobiliário, as diferentes formas de moradia permitiram manter esse forte arraigo pela terra. Posteriormente aborda-se o tema da recente verticalização residencial de luxo e se realiza uma análise semântica dessa, com a intenção de entender a reação da população frente a uma proposta residencial sem acesso a jardim ou espaço ao ar livre. Conclui-se que, embora possam existir outros fatores, o forte arraigo pela terra pode ser considerado um dos motivos principais do lento aceite dos novos empreendimentos verticais na Costa Rica.This article aims to evaluate the emergence and evolution of the Costa Rican real estate market in order to unravel the context of the strong bond with the land and hence the slow acceptance of new residential vertical trends. The methodology consists of annual fieldworks between 2011 and 2017, a revision of some local antique urban photographs and a bibliographical review of Costa Rican, Brazilian and international Marxist authors, with the purpose of formulating a theoretical discussion to show how changes in the modes of production and the local economy strengthened the relationship between people and their land. A broad time frame is analyzed, from the colonial period until nowadays, in order to examine, how across the course of the evolution of the real estate market, the different forms of housing have adapted to preserve the strong attachment that the population has had for their land. Afterward, the issue of the recent emergence of luxury vertical buildings is addressed and a semantic analysis is done to examine the population´s response to the new residential proposal without access to open space. It is concluded the strong attachment to the land may be one of the main reasons for the slow acceptance of new vertical developments in Costa Rica, even though there might exist other factors.Universidad de Costa Rica/[]/UCR/Costa RicaUniversidade Federal de Santa Catarina/[]/UFSC/BrasilUCR::Vicerrectoría de Docencia::Ciencias Sociales::Facultad de Ciencias Sociales::Escuela de Geografí