Avaliação de minerais em plantas medicinais amazônicas.

Amazônia brasileira oferece um apreciável potencial de plantas com propriedades terapêuticas, embora a maioria seja pouco conhecida. Dessa forma, com o objetivo de verificar a potencialidade nutricional de ervas medicinais, determinou-se a concentração de Ca, Mg, Fe, Cu e Zn nas folhas e nos chás das espécies: Piper callosum Ruiz & Pav., Piperaceae, Mikania lindleyana DC., Asteraceae e Arrabidaea chica (Humb. & Bonpl.) B. Verl., Bignoniaceae. As amostras de plantas depois de terem sido processadas, foram submetidas a digestão e em seguida realizada as leituras dos metais em um espectrofotômetro de absorção atômica. Para o chá de Arrabidaea chica foram detectados teores de Ca (6955 a 20058 mg/L), Mg (2390 a 3094 mg/L) e Fe (40 a 61 mg/L). Para o chá de Mikania lindleyana além da presença de altos valores de Ca (17722 a 22336 mg/L), Mg (4531 a 9370 mg/L) e Fe (20 a 87 mg/L) foram encontrados de 7 a 16 mg/L de Cu e 9 a 41 mg/L de Zn. O chá do Piper callosum apresentou em média 2036 a 4344 mg/L de Ca, 618 a 4023 mg/L de Mg e 39 a 60 mg/L de Fe. Comparando-se os resultados dos minerais com os valores recomendados pela Organização Mundial da Saúde, conclui-se que os metais presentes nos chás das plantas poderiam contribuir na complementação das dietas alimentares das pessoas que as utilizam

Impact of surface charge depletion on the free electron nonlinear response of heavily doped semiconductors

We propose surface modulation of the equilibrium charge density as a technique to control and enhance, via an external static potential, the free electron nonlinear response of heavily doped semiconductors. Within a hydrodynamic perturbative approach, we predict a two order of magnitude boost of free electron third-harmonic generation

Microfoundations

This paper argues that the microfoundations programme can be understood as an implementation of an underlying methodological principle—methodological individualism—and that it therefore shares a fundamental ambiguity with that principle, viz, whether the macro must be derived from and therefore reducible to, or rather consistent with, micro-level behaviours. The pluralist conclusion of the paper is not that research guided by the principle of microfoundations is necessarily wrong, but that the exclusion of approaches not guided by that principle is indeed necessarily wrong. The argument is made via an examination of the advantages claimed for dynamic stochastic general equilibrium models, the relationship between parts and wholes in social science, and the concepts of reduction, substrate neutrality, the intentional stance, and hypostatisation

Microfoundations

The paper argues that the microfoundations programme can be understood as an implementation of an underlying methodological principle, methodological individualism, and that it therefore shares a fundamental ambiguity with that principle, viz, whether the macro must be derived from and therefore reducible to, or rather consistent with micro-level behaviours. The pluralist conclusion of the paper is not that research guided by the principle of microfoundations is necessarily wrong, but that the exclusion of approaches not guided by that principle is indeed necessarily wrong. The argument is made via an examination of the advantages claimed for dynamic stochastic general equilibrium models, the relationship between parts and wholes in social science, and the concepts of reduction, substrate neutrality, the intentional stance, and hypostatisation

Enhancing Loan Quality Through Transparency: Evidence from the European Central Bank Loan Level Reporting Initiative

We explore whether transparency in banks’ securitization activities enhances loan quality. We take advantage of a novel disclosure initiative introduced by the European Central Bank, which requires, as of January 2013, banks that use their asset-backed securities as collateral for repo financing to report securitized loan characteristics and performance in a standardized format. We find that securitized loans originated under the transparency regime are of better quality with a lower default probability, a lower delinquent amount, fewer days in delinquency and lower losses upon default. Additionally, banks with more intensive loan level information collection and those operating under stronger market discipline experience greater improvement in their loan quality under the new reporting standards. Overall, we demonstrate that greater transparency has real effects by incentivizing banks to improve their credit practices

Privacy preserving pattern matching : implementation issues

Masteroppgave i informasjons- og kommunikasjonsteknologi 2002 - Høgskolen i Agder, GrimstadThe growing of the Internet has the potential to erode personal privacies. One can monitor a private data through the Internet without data owner knowledge. The project is to implement technique that allow pattern matching on user data and still preserve user privacy. Such technique gives possibility to place data on insecure third party site and be able to perform matching without revealing information about either data or pattern. The system uses public key cryptography to protect data on third part insecure site and to control revealing of data. The data owner participate in data decryption together with permitted data user

Enhancing the usability of Automatic Essay Evaluation

Automatic Essay Evaluation (AEE) systems are used to automatically evalute student essays. Most existing supervised machine learning algorithms require large amounts of training data to achive good results. The main objective of this study is to design