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5. Benders' decomposition of the unit commitment problem with semidefinite relaxation of AC power flow constraints

Author

Paredes, M., Martins, L. S. A., Soares, S., and Ye, Hongxing

Subjects
Mathematics - Optimization and Control
Abstract

In this paper we present a formulation of the unit commitment problem with AC power flow constraints. It is solved by a Benders decomposition in which the unit commitment master problem is formulated as a mixed-integer problem with linearization of the power generation constraints for improved convergence. Semidefinite programming relaxation of the rectangular AC optimal power flow is used in the subproblem, providing somewhat conservative cuts. Numerical case studies, including a 6-bus and the IEEE 118-bus network, are provided to test the effectiveness of our proposal. We show in our numerical experiments that the use of such strategy improves the quality of feasibility and optimality cuts generated by the solution of the convex relaxation of the subproblem, therefore reducing the number of iterations required for algorithm convergence., Comment: Accepted for publication in the Electric Power Systems Research journal on November 11, 2020

Published
2019
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7. AVALIAÇÃO DAS APRENDIZAGENS EM LIVROS: 1960 a 2020

Author

VILLAS BOAS, B. M. F., primary, FERREIRA, Cristhian Spindola, additional, DIAS, E. T. G., additional, SOARES, E. R. M., additional, SILVA, L. R. B., additional, OLIVEIRA, R. M. S., additional, SOARES, S. L., additional, and NOGUEIRA, V. L. C., additional

Published
2022
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9. Ant diversity studies in Brazil: an overview of the myrmecological research in a megadiverse country

Author

Schmidt, F. A., Ribas, C. R., Feitosa, R. M., Baccaro, F. B., de Queiroz, A. C. M., Sobrinho, T. G., Quinet, Y., Carvalho, K. S., Izzo, T., de Castro Morini, M. S., Nogueira, A., Torezan-Silingardi, H. M., Souza, J. L. P., Ulysséa, M. A., Vargas, A. B., Dáttilo, W., Del-Claro, K., Marques, T., Moraes, A. B., Paolucci, L., Rabello, A. M., Santos, J. C., Solar, R., de Albuquerque, E. Z., Esteves, F., Campos, R. B. F., Lange, D., Nahas, L., dos Santos, I. A., Silva, R. R., Soares, S. A., Camacho, G. P., da Costa-Milanez, C. B., DaRocha, W., Diehl-Fleig, E., Frizzo, T., Harada, A. Y., and Martello, F.

Published
2022
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22. Using Information Technology Based Exercises in Primary Mathematics Teaching of Children with Cerebral Palsy and Mental Retardation: A Case Study

Author

Reis, M. G. A. D., Cabral, L., Peres, E., Bessa, M., Valente, A., Morais, R., Soares, S., Baptista, J., Aires, A., Escola, J. J., Bulas-Cruz, J. A., and Reis, M. J. C. S.

Abstract

Technology has profoundly changed the way we learn and live. Indeed, such relationship appears to be quite complex, within IT contexts, and especially in socially and technologically rich learning environments, where related skills and learning are progressively required and fostered. Thus, if a satisfactory level of intellectual performance and social competence of a primary school pupil is indeed highly dependent on the type of participation that parents offer their children, IT, in general, and Internet, in particular, may well provide a new paradigm, setting forth that education and communication approach is truly more complex than ever before. It is on the basis of such paradigm that we therefore present a case study where a set of multimedia exercises were used in order to possibly improve the mathematical skills of pupils, one with mental retardation and another with cerebral palsy. Being part of a Web-based system to support students' learning, the referred set of multimedia exercises proved to be the children's favorite, rather than exercises in paper form, which also led the children to show a fair more positive attitude towards learning. Also, we observed that through the mentioned multimedia exercises, the children became far more autonomous, interested, persistent, happy, and able to easily absorb the material as well as more willingly to continue on working. (Contains 2 figures and 2 tables.)

Published
2010

29. EDUCAÇÃO, DIVERSIDADE E TECNOLOGIA

Author

VIEIRA, A. S. N., primary, DE CARVALHO, ANA CARLA FAGUNDES, additional, SANTOS, CARLOS DE SOUZA, additional, BARBOSA, CARMEN LUCIA SANTANA, additional, SANTOS, E. J., additional, OLIVEIRA, L. M. G., additional, VIEIRA, PATRÍCIA ALVES, additional, LUZ, R. S., additional, and SOARES, S. A. C. S., additional

Published
2020
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31. POLÍTICAS E GESTÃO DA EDUCAÇÃO SUPERIOR

Author

TAUCHEN, G., primary, BUZA, A. G., additional, LUZ, Charlene Bitencourt Soster, additional, ROSA, GABRIEL CELESTINO, additional, TASCHETTO, L. R., additional, BUMBA, F., additional, FUTI, XAVIER ALFREDO DA SILVA, additional, Buza, Alfredo Gabriel, additional, CHOCOLATE, F. A. M., additional, YOBA, C. P. C., additional, BAXE, HELENA GONÇALVES SERRÃO, additional, CERDEIRA, LUISA, additional, CABRITO, B. G., additional, PATROCINIO, TOMÁS, additional, MACHADO-TAYLOR, MARIA DE LOURDES, additional, SCHIRMER, SIRLEI NADIA, additional, UZCATEGUI, Y. V., additional, PORTO, ANGRA SANTOS, additional, GOMES, M. A., additional, SOARES, S. S., additional, ARAÚJO, L. M., additional, NGUNGUI, ANGELINA LOPES LUÍS AGUIARES, additional, AFONSO, FERNÃO OSÓRIO, additional, RAMÍREZ, IBRAHIN GONZÁLEZ, additional, HABOWSKI, A. C., additional, BRANCO, L. S. A., additional, CONTE, E., additional, SANTOS, ARLINDA CONCEIÇÃO DOS, additional, TCHINDA, ARCELAS WEVELA EVARISTO, additional, SACOMBOIO, E. N. M., additional, and CORREIA FILHO, J. M., additional

Published
2019
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38. Life-course socio-economic status and its impact on functional health of Portuguese older adults.

Author

Henriques, A., Ruano, L., Fraga, S., Soares, S., Barros, H., and Talih, M.

Abstract

Functional health is arguably one of the most important health indicators for older adults, because it assesses physical, cognitive and social functions in combination. However, life-course circumstances may impact this multidimensional construct. The aim of the present study was to assess the relationship between life-course socio-economic status (SES) and different dimensions of functional health in older adults. Data on 821 Portuguese adults aged 50 years and over in 2013–2015 were analysed. Life-course SES was computed using participants' paternal occupation (non-manual (nm); manual (m)) and own occupation (nm; m), resulting in four patterns: stable high (nm + nm), upward (m + nm), downward (nm + m) and stable low (m + m). Functional health included physical and mental functioning, cognitive function, handgrip strength, and walking speed. Linear (beta coefficients) and logistic regressions (odds ratios) were used to estimate the association between life-course SES and functional health. Overall, those who accumulated social disadvantage during life-course presented worse functional health than those with stable high SES (stable low – SF-36 physical functioning: β = −9.75; 95% CI: −14.34; −5.15; SF-36 mental health: β = −7.33; 95% CI: −11.55; −3.11; handgrip strength: β = −1.60; 95% CI: −2.86; −0.35; walking time, highest tertile: OR = 5.28; 95% CI: 3.07; 9.09). Those with an upward SES were not statistically different from those in the stable high SES for most of the health outcomes; however, those with an upward SES trajectory tended to have higher odds of cognitive impairment (OR = 1.75; 95% CI: 0.96; 3.19). A downward SES trajectory increased the odds of slower walking speed (OR = 4.62; 95% CI: 1.78; 11.95). A disadvantaged life-course SES impacts older adults' physical and mental functioning. For some outcomes, this was attenuated by a favourable adulthood SES but those with a stable low SES consistently presented worse functional health. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Does reading anxiety impact on academic achievement in higher education students?

Author

Soares, S., Boyes, Mark, Parrila, R., Badcock, N.A., Soares, S., Boyes, Mark, Parrila, R., and Badcock, N.A.

Abstract

Poor readers have lower academic achievement and increased anxiety, including reading anxiety, which may perpetuate lower academic achievement. We explored reading anxiety in university students, investigating whether the association between reading ability and academic achievement is mediated by reading anxiety (independent of general anxiety). Participants were students (n = 169, 69% female, age = 20.70) at an Australian university who completed an online reading assessment (decoding skills, phonological awareness, orthographical knowledge and comprehension), and a survey examining reading anxiety, trait anxiety and self-reported reading history. Academic achievement was based on university grades. Two reading anxiety factors (social and non-social) were identified; both factors were distinct from trait anxiety. Reading ability was negatively correlated with reading anxiety and positively correlated with academic achievement. Reading anxiety was not correlated with academic achievement and it did not mediate the relationship between reading ability and academic achievement as expected. As this was the first study to explore reading anxiety in adults, further research is required to determine the impact reading anxiety may have on university students beyond academic achievement.

Published
2023

41. Introduction - Multilingualism: Language, brain, and cognition

Author

Cabrelli, J., Chaouch-Orozco, A., Alonso, J., Pereira Soares, S., Puig-Mayenco, E., and Rothman, J.

Abstract

This chapter provides an introduction to the handbook. It succintly overviews the key questions in the field of L3/Ln acquisition and summarizes the scope of all the chapters included. The chapter ends by raising some outstanding questions that the field needs to address.

Published
2023

46. Wine

Author

Fernandes, I., primary, Pérez-Gregorio, R., additional, Soares, S., additional, Mateus, N., additional, and De Freitas, V., additional

Published
2017
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47. List of Contributors

Author

Abriouel, H., primary, Aguilera, Y., additional, Amigo, L., additional, Beena, D.J., additional, Benítez-Páez, A., additional, Benítez, V., additional, Benomar, N., additional, Bou, R., additional, Cerezo, A.B., additional, Chung, S.H., additional, Ciesarová, Z., additional, Coda, R., additional, Cofrades, S., additional, Coton, M., additional, Curiel, J.A., additional, Daniel, N., additional, De Freitas, V., additional, de las Rivas, B., additional, Diana, M., additional, Escalante, A., additional, Esteban-Torres, M., additional, Fernandes, I., additional, Fernandez, M.A., additional, Figueroa, L.M., additional, Frias, J., additional, Gálvez, A., additional, Garcia-Parrilla, M.C., additional, Gobbetti, M., additional, Gómez-Guillén, M.C., additional, González-SanJosé, M.L., additional, Gürsoy, O., additional, Gutiérrez-Uribe, J.A., additional, Hernández-Ledesma, B., additional, Ismail, B., additional, Jeong, J.-K., additional, Jiménez-Colmenero, F., additional, Karovičová, J., additional, Kesenkaş, H., additional, Kim, D.-H., additional, Kim, H.-Y., additional, Kim, M., additional, Knapp, C.W., additional, Kohajdová, Z., additional, Landete, J.M., additional, Le Barz, M., additional, López de Felipe, F., additional, López-Caballero, M.E., additional, López-Expósito, I., additional, Magala, M., additional, Mani, V., additional, Marette, A., additional, Martín-Cabrejas, M.A., additional, Martín-del-Campo, S.T., additional, Martínez-Álvarez, O., additional, Martinez-Villaluenga, C., additional, Martín, J.F., additional, Mas, A., additional, Mateus, N., additional, Mikušová, L., additional, Ming, L.C., additional, Miralles, B., additional, Montero, P., additional, Muñoz, R., additional, Nampoothiri, K.M., additional, Özbaş, H., additional, Park, K.-Y., additional, Patel, S., additional, Peñas, E., additional, Peres, C., additional, Peres, C.M., additional, Pérez-Gregorio, R., additional, Picard-Deland, É., additional, Quílez, J., additional, Reiter, R.J., additional, Reverón, I., additional, Rizzello, C.G., additional, Rodríguez, H., additional, Rodríguez, P.M., additional, Ryan, E.P., additional, Santamaría, L., additional, Sanz, Y., additional, Schmid, A., additional, Shukla, S., additional, Simon Sarkadi, L., additional, Soares, S., additional, Surma, M., additional, Torija, M.J., additional, Troncoso, A.M., additional, Valls-Bellés, V., additional, Vasanthakumari, D.S., additional, Walther, B., additional, Wilburn, J.R., additional, Xavier Malcata, F., additional, Zielińska, D., additional, and Zieliński, H., additional

Published
2017
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49. Feature Selection for Neural Networks Through Binomial Regression

Author

Gomes, Gecynalda Soares S., Ludermir, Teresa B., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, King, Irwin, editor, Wang, Jun, editor, Chan, Lai-Wan, editor, and Wang, DeLiang, editor

Published
2006
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50. T and D-Bench--Innovative Combined Support for Education and Research in Computer Architecture and Embedded Systems

Author

Soares, S. N. and Wagner, F. R.

Abstract

Teaching and Design Workbench (T&D-Bench) is a framework aimed at education and research in the areas of computer architecture and embedded systems. It includes a set of features not found in other educational environments. This set of features is the result of an original combination of design requirements for T&D-Bench: that the framework should provide modeling capabilities similar to that of Architecture Description Languages (popular in embedded systems design), and that it should have the simulation capabilities found only in educational simulators. This paper highlights the main features and the latest achievements of the framework and of its didactic and research simulators. The results of a new didactic strategy, supported by the simulators, are presented and discussed. The design of a new architectural feature for embedded processors, using a research simulator, is introduced, and it is shown how to employ such a research work as an educational module to teach the complexities involved in embedded systems design. (Contains 1 table and 2 figures.)

Published
2011
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