Search results for "97"
showing 10 items of 1081 documents
Analyses of the OSU-MASLWR Experimental Test Facility
2012
Today, considering the sustainability of the nuclear technology in the energy mix policy of developing and developed countries, the international community starts the development of new advanced reactor designs. In this framework, Oregon State University (OSU) has constructed, a system level test facility to examine natural circulation phenomena of importance to multi-application small light water reactor (MASLWR) design, a small modular pressurized water reactor (PWR), relying on natural circulation during both steady-state and transient operation. The target of this paper is to give a review of the main characteristics of the experimental facility, to analyse the main phenomena characteri…
Soil management effect on soil penetration resistance in the vineyard
2013
In environments characterized by steep slopes or arranged in terraces, among the shallow tillage systems, rototilling is extensively used. However, the effect of the repeated use of rototilling has a considerable influence on soil characteristics; it appears finely powdered, soft and without structure. In order to limit these inconveniences, an innovative self-propelled machine equipped with working tools as a spade, to be used in steep slopes or arranged in terraces areas, was designed by the Mechanics Section of the SAF (Scienze Agrarie e Forestali) Department of the University of Palermo in cooperation with Agrotec company, Padua, Italy. The aim of this study is to compare the effects of…
Competencias tecnológicas en estudiantes de Educación Superior
2014
En las últimas décadas las Tecnologías de la Información y Comunicación se han incorporado en todos los ámbitos de forma extensiva, y también ha influido en el ámbito educativo, aunque todavía queda mucho recorrido para la totalidad de su implantación. Los/as estudiantes son la pieza clave para comprobar el proceso de integración de las TIC en el sistema educativo, por ello, este artículo se centra en realizar una revisión sistemática de la literatura sobre las competencias en TIC de los estudiantes universitarios, y para ello se establecen dos ámbitos: competencias tecnológicas y competencias pedagógicas y la relación que existen entre ellas, y a su vez, con el uso de las mismas, y la inf…
Jutekliskās uztveres tematizācija Pētera Handkes stāstā „Senviktuāras kalna mācība”
2015
Bakalaura darbs ir veltīts tēmai „Jutekliskās uztveres tematizācija Pētera Handkes stāstā Senviktuāra kalna mācība”. Darba mērķis ir izmeklēt un aplūkot Pētera Handkes jutekliskās uztveres atspoguļojumu stāstā Senviktuāra kalna mācība. Darba uzdevums ir izpētīt rakstnieka Pētera Handkes personību un viņa slaveno tetraloģiju, it īpaši tetraloģijas otro daļu. Darbs ir sadalīts trijās nodaļās. Pirmajā nodaļā tiek apskatīts un visparēji raksturots jēdziens „mūsdienu literatūra”, kā arī tiek apskatīta tā laika politiskā un sabiedriskā situācija Vācijā un Austrijā. Papildus tiek apskatīta mūsdienu rakstnieku paaudze un Pēters Handke tiek prezentēts kā mūsdienu vācu rakstnieku paaudzes populārs pā…
Activité physique et prévention des chutes chez les personnes âgées
2015
Les chutes chez les personnes âgées sont fréquentes : près d’une personne de plus de 65 ans sur trois et une personne de plus de 80 ans sur deux chutent chaque année. L’état de santé, les capacités fonctionnelles, les facteurs comportementaux ou les caractéristiques de l’environnement constituent autant de facteurs de risque. Au-delà des traumatismes physiques et psychologiques tels que la peur de tomber qui en résultent, les chutes peuvent entraîner des limitations fonctionnelles, une diminution de la qualité de vie, une perte d’autonomie voire une entrée en institution.Dans un contexte de vieillissement de la population, la prévention des chutes et la préservation de l’autonomie dans les …
Combined effects of compost and Medicago sativa in recovery a PCB contaminated soil
2020
The effectiveness of adding compost and the plant Medicago sativa in improving the quality of a soil historically contaminated by polychlorinated biphenyls (PCBs) was tested in greenhouse microcosms. Plant pots, containing soil samples from an area contaminated by PCBs, were treated with the compost and the plant, separately or together. Moreover, un-treated and un-planted microcosms were used as controls. At fixed times (1, 133 and 224 days), PCBs were analysed and the structure (cell abundance, phylogenetic characterization) and functioning (cell viability, dehydrogenase activity) of the natural microbial community were also measured. The results showed the effectiveness of the compost an…
Extending the Tsetlin Machine With Integer-Weighted Clauses for Increased Interpretability
2020
Despite significant effort, building models that are both interpretable and accurate is an unresolved challenge for many pattern recognition problems. In general, rule-based and linear models lack accuracy, while deep learning interpretability is based on rough approximations of the underlying inference. Using a linear combination of conjunctive clauses in propositional logic, Tsetlin Machines (TMs) have shown competitive performance on diverse benchmarks. However, to do so, many clauses are needed, which impacts interpretability. Here, we address the accuracy-interpretability challenge in machine learning by equipping the TM clauses with integer weights. The resulting Integer Weighted TM (…
Using the Tsetlin Machine to Learn Human-Interpretable Rules for High-Accuracy Text Categorization With Medical Applications
2019
Medical applications challenge today's text categorization techniques by demanding both high accuracy and ease-of-interpretation. Although deep learning has provided a leap ahead in accuracy, this leap comes at the sacrifice of interpretability. To address this accuracy-interpretability challenge, we here introduce, for the first time, a text categorization approach that leverages the recently introduced Tsetlin Machine. In all brevity, we represent the terms of a text as propositional variables. From these, we capture categories using simple propositional formulae, such as: if "rash" and "reaction" and "penicillin" then Allergy. The Tsetlin Machine learns these formulae from a labelled tex…
A Two-Stage Reconstruction of Microstructures with Arbitrarily Shaped Inclusions
2020
The main goal of our research is to develop an effective method with a wide range of applications for the statistical reconstruction of heterogeneous microstructures with compact inclusions of any shape, such as highly irregular grains. The devised approach uses multi-scale extended entropic descriptors (ED) that quantify the degree of spatial non-uniformity of configurations of finite-sized objects. This technique is an innovative development of previously elaborated entropy methods for statistical reconstruction. Here, we discuss the two-dimensional case, but this method can be generalized into three dimensions. At the first stage, the developed procedure creates a set of black synthetic …
Fast MATLAB assembly of FEM matrices in 2D and 3D: Edge elements
2014
We propose an effective and flexible way to assemble finite element stiffness and mass matrices in MATLAB. We apply this for problems discretized by edge finite elements. Typical edge finite elements are Raviart-Thomas elements used in discretizations of H(div) spaces and Nedelec elements in discretizations of H(curl) spaces. We explain vectorization ideas and comment on a freely available MATLAB code which is fast and scalable with respect to time.