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Vitorino Freire, Brazil

Zampieri F.L.,University Federal da Fronteira Sul | Da Costa Braga A.,Federal University of Rio Grande do Sul | De Ugalde C.M.,Grande Rio University | Rigatti D.,Centro Universitario Ritter dos Reis
SSS 2015 - 10th International Space Syntax Symposium | Year: 2015

Understanding generative pedestrian movement causes is a key urban planning issue, especially when it comes to verify public policies efficiency towards open public spaces maintenance or improvement and the correlation of such governance actions in strengthening social dynamics. Pedestrian movement is a complex phenomenon which patterns emerge from the interaction among multidimensional variables ranging from cultural behavioural patterns underlying social relations, spatial configuration accessibility patterns to sidewalk attributes. The most effective problem-solving tools applied in order to improve pedestrian movement focus on modelling sidewalk attributes through the relations held amidst their physical variables. In this paper we introduce a modelling method which processes data interactions through artificial neural networks and genetic algorithms. Hybrid data parallel processing allow the comparison between potential and empirically measured pedestrian movement based on space syntax variables and sidewalks service levels. It provides accurate and reliable descriptions for public open spaces social appropriation patterns and its correlations to changes in urban grid morphology and functional centralities. The model proved its efficiency in processing simultaneously large data samples which consider whole urban areas global spatial structure, what enabled the impact analysis of large scale vehicular through movement on local scale movement and depict changes on pedestrian behaviour. The empirical case from which data were collected, the city of Criciúma / Brazil, summarizes a pervasive phenomenon to several Brazilian cities located on crossroads-the rupture of a consolidated functional centrality by the convergence between roads and main street sectioning the city core and causing the emergence of dynamic barriers related to heavy traffic through movement which imposes discontinuities to the urban grid, changing natural movement potentials, social appropriation and land use patterns. Modelling data samples altogether for the whole configuration failed to provide significant correlations to measured pedestrian movement. Several modelling tests indicated that axial lines which displayed higher Choice variable values, that is, indicated higher fluxes probability through the urban system were coincident with morphological neighbourhood boundaries. Evidences obtained through the separated modelling of zones bounded by axial lines which displayed higher global Choice values led to the corroboration of the following hypothesis: barriers aroused by high regional and global accessibility road lanes might divide city cores and trigger morphological transformations that induce differentiation among the resulting parts which are coherent to the degree of spatial segregation. The outcome of this complex process at local scale is the socially shared acknowledgment of distinct neighbourhood boundaries defined by drastic changes on the spatial logic underlying the production of urban space depicted by pedestrians through morphological properties changes. It grants legibility to eventual spatial segregation imposed by a through movement route linking the city core to its regional surroundings. Source


Mozetic H.,Centro Universitario Ritter dos Reis | Boff U.,Centro Universitario Ritter dos Reis | Luna W.H.D.,Servico Nacional de Aprendizagem Industrial SENAI | Pfingstag M.E.,URI Integrated Regional University Brazil | And 3 more authors.
Journal of Electrical Systems | Year: 2016

The purposes of this paper were to study the thermal treatment of Fe-Si sheet, as well as the sheet cutting concerning the topology of a mini stepper motor and mini motor simulation using finite element software. The research consisted of the execution of an "Inductive Reheating" thermal treatment of Iron Silicon sheets, NM71-2000/35F 420M with GNO (Grain Non Oriented), and 0.35mm width. The new technique has the benefit of minimizing magnetic losses produced by the cut on the edge of electric sheets. To carry out the process, the system includes a furnace, an induction coil, and a power supply that, when activated in a controlled way, causes relevant changes to the crystalline structure of the material. Related to the cut of the sheets, the topology of a three phase mini stepper motor was considered. The sheets were initially cut using the geometry of the rotor and stator cores. Firstly, a die cutting process was used and later a wire electroerosion cutting process was employed, which provided parts with excellent finishing. Finally, the mini motor was simulated using the finite element software FEMM 4.2 in order to analyze the airgap flow and torque development of the axis end, in comparison to a solid block of the same material (Fe-Si). Copyright. © JES 2016. Source


Duarte J.P.,Centro Universitario Univates | Paludo J.,Federal University of Rio Grande do Sul | Lemos J.R.N.,Centro Universitario Ritter dos Reis | Moreira T.R.,Centro Universitario Univates
Scientia Medica | Year: 2014

Aims: To assess the prevalence of nutritional risk in hospitalized subjects and the agreement in nutritional diagnosis between five nutritional screening protocols. Methods: A cross-sectional study included patients of both genders, aged 18, admitted to hospital from January to March 2013 Within the first 48 hours of admission, the following nutritional screening protocols were applied: Mini Nutrition Assessment (MNA); Mini Nutrition Assessment Short Form (MNA-S); Subjective Global Assessment (ASG); Nutritional Risk Screening (NRS 2002); and Malnutrition Universal Screening Tool (MUST). The protocols consist of questions related to weight loss, body mass index, functional capacity, food appetite and gastrointestinal disturbances. Subjects were classified into two levels: well-nourished and malnourished. Results: A sample of 100 patients were evaluated, which showed 49 (49%) individuals at nutritional risk by the MNA protocol; 53 (53%) by MNA-SF; 23 (23%) by MUST; 7 (7%) by NRS; and 4 (4%) by ASG. The female and aged over 60 years prevailed in the sample. Three protocols, MNA-SF, MUST and NRS, showed a higher nutritional risk in patients over 60 years (p≤0.05). It was observed that MNA and MNA-SF protocols obtained better agreement (Kappa coefficient = 0.760, p<0.001). Conclusions: There was good agreement between the protocols MNA and MNA-SF, but not of those with other protocols, which also showed no correlation with each other. The protocol that ranked the highest percentage of patients at nutritional risk was the MNA-SF, and less nutritional risk was detected by ASG. Source


Ghilardi M.C.,Centro Universitario Ritter dos Reis | Ribeiro V.G.,Centro Universitario Ritter dos Reis | Zabadal J.R.,Federal University of Rio Grande do Sul | Poffal C.A.,Grande Rio University
Acta Scientiarum - Technology | Year: 2013

Security demands, forensic practices and the identification of criminals require the detection and recognition of iris and fingerprints and of faces in videos and photographs. Moreover, there is an increasing need for multiple forms of human-machine interaction. Control devices by body stimulus are a need and a trend. For example, currently some computers, laptops, phones and video games provide interaction from their cameras, not only for face detection but also for body movements and the detection of objects. Most devices are Internet accessed, which creates an even greater range of possibilities. These technological trends have prompted the development a toolkit for detecting faces in real time. The choice of Silverlight framework for the development of this toolkit provides these applications with instruments that could be implemented in a web browser. This toolkit may be used for other purposes, such as face and iris recognition, body movement and the monitoring of premises. An application was developed as example and proof of concept. Source


De Ugalde C.M.,Grande Rio University | Da Costa Braga A.,Federal University of Rio Grande do Sul | Rigatti D.,Centro Universitario Ritter dos Reis | Zampieri F.L.,University Federal da Fronteira Sul
SSS 2015 - 10th International Space Syntax Symposium | Year: 2015

Porto Alegre, Brazil, was one of the cities where the World Soccer Championship took place in 2014. Like in the other ones, authorities listed a number of decisions to be taken in order to better host thousands of tourists that would be in town not only to watch the games but also to enjoy the city and regional attractions. One of the main aspects to be improved was urban mobility. It was intended by authorities that all journeys should be easy for residents and tourists. Solutions towards straighter paths linking hotspots and attractors, like the airport, bus stations, soccer stadium, restaurants and pubs, hotels, parks and historical areas should be searched by urban planners. Thus, the road system conditions should be evaluated regarding to quickness, safeness and comfort for drivers and passengers. A basic aspect on mobility in cities issue is the urban grid accessibility. The purpose of the research was to discuss the situation in Porto Alegre before the sports event and the effects on accessibility and potential movement caused by the modifications and increments on the grid prescribed by planners and authorities for the World Cup. Seven infrastructure projects in different places were selected for the intended evaluation. Potential co-presence among local population and tourists was analyzed from the results of an overlay between the main street grid, emerged on the spatial configuration, and the specific roads and streets that were potentially coursed by visitors and tourists, in the sense that they could have increased social and economic opportunities as well as cultural exchange during the days of the event. Space syntax measures like step depth, global integration, and choice, were applied not only to evaluate the accessibility but also to identify the potential main routes chosen by tourists and citizens to move from one attractor to another. On one hand, results allowed the conclusion that those infrastructures didn't affect significantly the grid accessibility of Porto Alegre as a whole, although the integration core incorporated some important spaces as consequence of the modifications on connections. On the other hand, the potential routes of movement among different places of interest match with choice foreground network, what suggests that there was a considerable chance of co-presence between Porto Alegre citizens and strangers during the World Cup. Source

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