Export 2488 results:
Sort by: Author Title Type [ Year  (Desc)]
2014
Merino, E. G., G. Lavareda, P. Brogueira, A. Amaral, C. Nunes de Carvalho, and PL Almeida. "InOx thin films deposited by plasma assisted evaporation: Application in light shutters." VACUUM. 107 (2014): 116-119. Abstract

{An integration of undoped InOx and commercial ITO thin films into laboratory assembled light shutter devices is made. Accordingly, undoped transparent conductive InOx thin films, about 100 nm thick, are deposited by radiofrequency plasma enhanced reactive thermal evaporation (rf-PERTE) of indium teardrops with no intentional heating of the glass substrates. The process of deposition occurs at very low deposition rates (0.1-0.3 nm/s) to establish an optimized reaction between the oxygen plasma and the metal vapor. These films show the following main characteristics: transparency of 87% (wavelength

Valtchev, Stanimir, Rui Neves-Medeiros, Anastassia Krusteva, George Gigov, and Plamen Avramov. "A wireless energy transceiver based on induction heating equipment." 2014 16th International Power Electronics and Motion Control Conference and Exposition. Institute of Electrical {&} Electronics Engineers ({IEEE}), 2014. Abstract
n/a
Amaro, P., C. I. Szabo, S. Schlesser, A. Gumberidze, E. G. Kessler, A. Henins, E. O. Le Bigot, M. Trassinelli, J. M. Isac, P. Travers, M. Guerra, J. P. Santos, and P. Indelicato. "A vacuum double-crystal spectrometer for reference-free X-ray spectroscopy of highly charged ions." Radiation Physics and Chemistry. 98 (2014): 132-149. AbstractWebsite

Radiation Physics and Chemistry, 98 + (2014) 132-149. doi:10.1016/j.radphyschem.2014.01.015

Amaro, P., C. I. Szabo, S. Schlesser, A. Gumberidze, E. G. Kessler, A. Henins, E. O. Le Bigot, M. Trassinelli, J. M. Isac, P. Travers, M. Guerra, J. P. Santos, and P. Indelicato. "A vacuum double-crystal spectrometer for reference-free X-ray spectroscopy of highly charged ions." Radiation Physics and Chemistry. 98 (2014): 132-149. AbstractWebsite

Radiation Physics and Chemistry, 98 + (2014) 132-149. doi:10.1016/j.radphyschem.2014.01.015

Altstadt, S. G., et al. "{$^{13,14}$B(n, $\gamma$) via Coulomb Dissociation for Nucleosynthesis towards the r-Process}." Nuclear Data Sheets. 120 (2014): 197-200. AbstractWebsite
n/a
Cunha, Jácome, João Paulo Fernandes, Jorge Mendes, Rui Pereira, and João Saraiva. "Design and Implementation of Queries for Model-Driven Spreadsheets." Central European Functional Programming School - 5th Summer School, CEFP 2013, Revised Selected Papers. Eds. Viktória Zsók, and et al. Lecture Notes in Computer Science. Heidelberg: Springer, 2014. Abstractdsl13_query.pdf

This paper presents a domain-specific querying language for model-driven spreadsheets. We briefly show the design of the language and present in detail its implementation, from the denormalization of data and translation of our user-friendly query language to a more efficient query, to the execution of the query using Google. To validate our work, we executed an empirical study, comparing QuerySheet with an alternative spreadsheet querying tool, which produced positive results.

Cunha, Jácome, João Paulo Fernandes, and João Saraiva. "Spreadsheet Engineering." Central European Functional Programming School - 5th Summer School, CEFP 2013, Revised Selected Papers. Eds. Viktória Zsók, and et al. Lecture Notes in Computer Science. Springer, Heidelberg 2014. Abstractdsl13_notes.pdf

These tutorial notes present a methodology for spreadsheet engineering. First, we present data mining and database techniques to reason about spreadsheet data. These techniques are used to compute relationships between spreadsheet elements (cells/columns/rows). These relations are then used to infer a model defining the business logic of the spreadsheet. Such a model of a spreadsheet data is a visual domain specific language that we embed in a well-known spreadsheet system. The embedded model is the building block to define techniques for model-driven spreadsheet development, where advanced techniques are used to guarantee the model-instance synchronization. In this model-driven environment, any user data update as to follow the the model-instance conformance relation, thus, guiding spreadsheet users to introduce correct data. Data refinement techniques are used to synchronize models and instances after users update/evolve the model. These notes briefly describe our model-driven spreadsheet environment, the MDSheet environment, that implements the presented methodology. To evaluate both proposed techniques and the MDSheet tool, we have conducted, in laboratory sessions, an empirical study with the summer school participants. The results of this study are presented in these notes.

Safari, L., P. Amaro, J. P. Santos, and F. Fratini. "Angular and polarization analysis for two-photon decay of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mn>2</mn><mi>s</mi></mrow></math>&." Physical Review A. 90 (2014): 014502. AbstractWebsite

The amplitude of two-photon transitions between hyperfine states in hydrogenlike ions is derived based on the relativistic Dirac equation and second-order perturbation theory. We study angular and linear polarization properties of the photon pair emitted in the decay of $2s$ states, where spin-flip and non-spin-flip transitions are highlighted. We pay particular attention to hydrogenlike uranium, since it is an ideal candidate for investigating relativistic and high-multipole effects, such as spin-flip transitions. Two types of emission patterns are identified: (i) non-spin-flip transitions are found to be characterized by an angular distribution of the type $W($\theta${})$\sim${}1+{cos}^{2}$\theta${}$ while the polarizations of the emitted photons are parallel; and (ii) spin-flip transitions have somewhat smaller decay rates and are found to be characterized by an angular distribution of the type $W($\theta${})$\sim${}1$-${}1/3{cos}^{2}$\theta${}$ while the polarizations of the emitted photons are orthogonal, where $$\theta${}$ is the angle between photons directions. Deviations due to nondipole and relativistic contributions are evaluated for both types of transitions. This work is the first step toward exploring the effect of the nucleus over the angular and polarization properties of the photon pairs emitted by two-photon transitions.

Safari, L., P. Amaro, J. P. Santos, and F. Fratini. "Angular and polarization analysis for two-photon decay of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mn>2</mn><mi>s</mi></mrow></math>&." Physical Review A. 90 (2014): 014502. AbstractWebsite

The amplitude of two-photon transitions between hyperfine states in hydrogenlike ions is derived based on the relativistic Dirac equation and second-order perturbation theory. We study angular and linear polarization properties of the photon pair emitted in the decay of $2s$ states, where spin-flip and non-spin-flip transitions are highlighted. We pay particular attention to hydrogenlike uranium, since it is an ideal candidate for investigating relativistic and high-multipole effects, such as spin-flip transitions. Two types of emission patterns are identified: (i) non-spin-flip transitions are found to be characterized by an angular distribution of the type $W($\theta${})$\sim${}1+{cos}^{2}$\theta${}$ while the polarizations of the emitted photons are parallel; and (ii) spin-flip transitions have somewhat smaller decay rates and are found to be characterized by an angular distribution of the type $W($\theta${})$\sim${}1$-${}1/3{cos}^{2}$\theta${}$ while the polarizations of the emitted photons are orthogonal, where $$\theta${}$ is the angle between photons directions. Deviations due to nondipole and relativistic contributions are evaluated for both types of transitions. This work is the first step toward exploring the effect of the nucleus over the angular and polarization properties of the photon pairs emitted by two-photon transitions.

Fratini, F., L. Safari, A. G. Hayrapetyan, K. Jankala, P. Amaro, and J. P. Santos. "Quantized form factor shift in the presence of free electron laser radiation." EPL (Europhysics Letters). 107 (2014): 13002. AbstractWebsite

In electron scattering, the target form factors contribute significantly to the diffraction pattern and carry information on the target electromagnetic charge distribution. Here we show that the presence of electromagnetic radiation, as intense as currently available in free electron lasers, shifts the dependence of the target form factors by a quantity that depends on the number of photons absorbed or emitted by the electron as well as on the parameters of the electromagnetic radiation. As example, we show the impact of intense ultraviolet and soft X-ray radiation on elastic electron scattering by the Ne-like argon ion and by the xenon atom. We find that the shift brought by the radiation to the form factor is of the order of some percent. Our results may open up a new avenue to explore matter with the assistance of laser.

Fratini, F., L. Safari, A. G. Hayrapetyan, K. Jankala, P. Amaro, and J. P. Santos. "Quantized form factor shift in the presence of free electron laser radiation." EPL (Europhysics Letters). 107 (2014): 13002. AbstractWebsite

In electron scattering, the target form factors contribute significantly to the diffraction pattern and carry information on the target electromagnetic charge distribution. Here we show that the presence of electromagnetic radiation, as intense as currently available in free electron lasers, shifts the dependence of the target form factors by a quantity that depends on the number of photons absorbed or emitted by the electron as well as on the parameters of the electromagnetic radiation. As example, we show the impact of intense ultraviolet and soft X-ray radiation on elastic electron scattering by the Ne-like argon ion and by the xenon atom. We find that the shift brought by the radiation to the form factor is of the order of some percent. Our results may open up a new avenue to explore matter with the assistance of laser.

Maiti, B. K., T. Aviles, I. Moura, S. R. Pauleta, and JJG Moura. "Synthesis and characterization of [S2MoS2Cu(n-SPhF)](2-) (n = o, m, P) clusters: Potential F-19-NMR structural probes for Orange Protein." Inorg Chem Commun. 45 (2014): 97-100. AbstractWebsite

Three fluorinated Mo-Cu-thiolate isomers,[Ph4Ph[S2MoS2Cu(n-SPhF)], [n-SPhF = 2-fluorothiophenol (la)], 3-fluorothiophenol (lb), and 4-fluorothiophenol (1c)] were synthesized and spectroscopically characterized. The F-19-NMR signal of the fluorine atom in the.benzene has different chemical shift for each isomer, which is highly influenced by the local environment that can be manipulated by different solvents and solutes. The fluorine-19 chemical shift is an advantageous NMR structural probe in alternative to H-1-NMR [B.K. Maiti, T. Aviles, M. Matzapetakis, I. Moura, S.R. Pauleta, JJ.G. Moura, Eur. J. Inorg. Chem. (2012) 4159.], that can be used to provide local information on the pocket of the metal cluster in the Orange Protein (ORP). (C) 2014 Elsevier B.V. All rights reserved.

Azevedo, S. G., S., Carvalho, H., H., Cruz-Machado, and V. "A cross case analysis of RFID deployment Fast Fashion Supply Chain." Advances in Intelligent Systems and Computing. 2014. 45-57. Abstract
n/a
Joaquim, Castro-Fonseca, and Grilo António. "A DEA Application for Hotels Facebook Posting." 2014. Abstract
n/a
Aneesh, Zutshi, Grilo António, and Jardim-Gonçalves Ricardo. "A Dynamic Agent-Based Modeling Framework for Digital Business Models: Applications to Facebook and a Popular Portuguese Online Classifieds Website." Advances in Intelligent Systems and Computing. 2014. 105-117. Abstract
n/a
Aneesh, Zutshi, Grilo Antonio, and Jardim-Gonçalves Ricardo. "DYNAMOD—An Agent Based Modeling Framework: Applications to Online Social Networks." Advances in Intelligent Systems and Computing. 2014. 349-361. Abstract
n/a
Catarina, Marques-Lucena, Sarraipa João, Fonseca Joaquim, Grilo António, and Jardim-Gonçalves Ricardo. "Framework for Customers’ Sentiment Analysis." Advances in Intelligent Systems and Computing. 2014. 849-860. Abstract
n/a
Izunildo, Cabral, Grilo Antonio, Gonçalves-Coelho Antonio, and Mourão Antonio. "Modeling Business Interoperability in a Context of Collaborative Supply Chain Networks." Advances in Intelligent Systems and Computing. 2014. 187-199. Abstract
n/a
Joaquim, Castro-Fonseca, and Grilo Antonio. "Modeling Facebook Posting Life-Cycle." Frontiers in Artificial Intelligence and Applications. 2014. 17-24. Abstract
n/a
A, Baptista, Soares Ferreira P. I, and Borges JP. "Nanofibers and Nanoparticles in Biomedical Applications." Bioengineered Nanomaterials. Eds. Atul Tiwari, and Ashutosh Tiwari. CRC Press - Taylor & Francis Group, 2014. 93-123. Abstract
n/a
Azevedo, S. G., S., Carvalho, H., H., Cruz-Machado, and V. "RFID application infant security systems of healthcare organizations." Advances in Intelligent Systems and Computing. 2014. 45-57. Abstract
n/a
A, Mehrbod, Zutshi A, and Grilo A. "Semantic and syntactic matching of e-catalogues: Using vector space model." 2014. 224-229. Abstract
n/a
A, Zutshi, Grilo A, and Jardim-Gonçalves R. "Simulating digital businesses using an agent based modeling approach." 2014. Abstract
n/a
Savita, Singh, Kale Sandip, Gawande Manoj, Velhinho Alexandre, and Jayarama Radha. "A synthesis of copper based metal-organic framework for O-acetylation of alcohols." 44 (2014): 24-28. Abstract
n/a