Metodologia para adaptação de microarquiteturas microprogramadas soft-core à uma ISA padrão: estudo do impacto sobre a complexidade de hardware para o padrão MIPS

In academia, it is common to create didactic processors, facing practical disciplines in the area of Hardware Computer and can be used as subjects in software platforms, operating systems and compilers. Often, these processors are described without ISA standard, which requires the creation of compilers and other basic software to provide the hardware / software interface and hinder their integration with other processors and devices. Using reconfigurable devices described in a HDL language allows the creation or modification of any microarchitecture component, leading to alteration of the functional units of data path processor as well as the state machine that implements the control unit even as new needs arise. In particular, processors RISP enable modification of machine instructions, allowing entering or modifying instructions, and may even adapt to a new architecture. This work, as the object of study addressing educational soft-core processors described in VHDL, from a proposed methodology and its application on two processors with different complexity levels, shows that it s possible to tailor processors for a standard ISA without causing an increase in the level hardware complexity, ie without significant increase in chip area, while its level of performance in the application execution remains unchanged or is enhanced. The implementations also allow us to say that besides being possible to replace the architecture of a processor without changing its organization, RISP processor can switch between different instruction sets, which can be expanded to toggle between different ISAs, allowing a single processor become adaptive hybrid architecture, which can be used in embedded systems and heterogeneous multiprocessor environments

WI-BIO: redes de monitoramento de pacientes em ambientes de automação hospitalar utilizando o padrão IEEE 802.11

The monitoring of patients performed in hospitals is usually done either in a manual or semiautomated way, where the members of the healthcare team must constantly visit the patients to ascertain the health condition in which they are. The adoption of this procedure, however, compromises the quality of the monitoring conducted since the shortage of physical and human resources in hospitals tends to overwhelm members of the healthcare team, preventing them from moving to patients with adequate frequency. Given this, many existing works in the literature specify alternatives aimed at improving this monitoring through the use of wireless networks. In these works, the network is only intended for data traffic generated by medical sensors and there is no possibility of it being allocated for the transmission of data from applications present in existing user stations in the hospital. However, in the case of hospital automation environments, this aspect is a negative point, considering that the data generated in such applications can be directly related to the patient monitoring conducted. Thus, this thesis defines Wi-Bio as a communication protocol aimed at the establishment of IEEE 802.11 networks for patient monitoring, capable of enabling the harmonious coexistence among the traffic generated by medical sensors and user stations. The formal specification and verification of Wi-Bio were made through the design and analysis of Petri net models. Its validation was performed through simulations with the Network Simulator 2 (NS2) tool. The simulations of NS2 were designed to portray a real patient monitoring environment corresponding to a floor of the nursing wards sector of the University Hospital Onofre Lopes (HUOL), located at Natal, Rio Grande do Norte. Moreover, in order to verify the feasibility of Wi-Bio in terms of wireless networks standards prevailing in the market, the testing scenario was also simulated under a perspective in which the network elements used the HCCA access mechanism described in the IEEE 802.11e amendment. The results confirmed the validity of the designed Petri nets and showed that Wi-Bio, in addition to presenting a superior performance compared to HCCA on most items analyzed, was also able to promote efficient integration between the data generated by medical sensors and user applications on the same wireless network

Análise de desempenho de estratégias de retransmissão para o mecanismo HCCA do padrão de redes sem fio IEEE 802.11e

This paper presents the performanee analysis of traffie retransmission algorithms pro¬posed to the HCCA medium aeeess meehanism of IEEE 802.11 e standard applied to industrial environmen1. Due to the nature of this kind of environment, whieh has eleetro¬magnetic interferenee, and the wireless medium of IEEE 802.11 standard, suseeptible to such interferenee, plus the lack of retransmission meehanisms, refers to an impraetieable situation to ensure quality of service for real-time traffic, to whieh the IEEE 802.11 e stan¬dard is proposed and this environment requires. Thus, to solve this problem, this paper proposes a new approach that involves the ereation and evaluation of retransmission al-gorithms in order to ensure a levei of robustness, reliability and quality of serviee to the wireless communication in such environments. Thus, according to this approaeh, if there is a transmission error, the traffie scheduler is able to manage retransmissions to reeo¬ver data 10s1. The evaluation of the proposed approaeh is performed through simulations, where the retransmission algorithms are applied to different seenarios, whieh are abstrae¬tions of an industrial environment, and the results are obtained by using an own-developed network simulator and compared with eaeh other to assess whieh of the algorithms has better performanee in a pre-defined applieation

Análise de desempenho na rede metropolitana de saúde da Universidade Federal do Rio Grande do Norte : um dimensionamento aplicado a telemedicina e a telessaúde utilizando QoS baseado no padrão IEEE 802.1Q

It s notorious the advance of computer networks in recent decades, whether in relation to transmission rates, the number of interconnected devices or the existing applications. In parallel, it s also visible this progress in various sectors of the automation, such as: industrial, commercial and residential. In one of its branches, we find the hospital networks, which can make the use of a range of services, ranging from the simple registration of patients to a surgery by a robot under the supervision of a physician. In the context of both worlds, appear the applications in Telemedicine and Telehealth, which work with the transfer in real time of high resolution images, sound, video and patient data. Then comes a problem, since the computer networks, originally developed for the transfer of less complex data, is now being used by a service that involves high transfer rates and needs requirements for quality of service (QoS) offered by the network . Thus, this work aims to do the analysis and comparison of performance of a network when subjected to this type of application, for two different situations: the first without the use of QoS policies, and the second with the application of such policies, using as scenario for testing, the Metropolitan Health Network of the Federal University of Rio Grande do Norte (UFRN)

Implementação paralela escalável e eficiente do algoritmo simplex padrão em arquitetura multicore

This work presents a scalable and efficient parallel implementation of the Standard Simplex algorithm in the multicore architecture to solve large scale linear programming problems. We present a general scheme explaining how each step of the standard Simplex algorithm was parallelized, indicating some important points of the parallel implementation. Performance analysis were conducted by comparing the sequential time using the Simplex tableau and the Simplex of the CPLEXR IBM. The experiments were executed on a shared memory machine with 24 cores. The scalability analysis was performed with problems of different dimensions, finding evidence that our parallel standard Simplex algorithm has a better parallel efficiency for problems with more variables than constraints. In comparison with CPLEXR , the proposed parallel algorithm achieved a efficiency of up to 16 times better

Estudo numérico de escoamento turbulento em padrão anular gás-líquido em dutos verticais

Multiphase flows in ducts can adopt several morphologies depending on the mass fluxes and the fluids properties. Annular flow is one of the most frequently encountered flow patterns in industrial applications. For gas liquid systems, it consists of a liquid film flowing adjacent to the wall and a gas core flowing in the center of the duct. This work presents a numerical study of this flow pattern in gas liquid systems in vertical ducts. For this, a solution algorithm was developed and implemented in FORTRAN 90 to numerically solve the governing transport equations. The mass and momentum conservation equations are solved simultaneously from the wall to the center of the duct, using the Finite Volumes Technique. Momentum conservation in the gas liquid interface is enforced using an equivalent effective viscosity, which also allows for the solution of both velocity fields in a single system of equations. In this way, the velocity distributions across the gas core and the liquid film are obtained iteratively, together with the global pressure gradient and the liquid film thickness. Convergence criteria are based upon satisfaction of mass balance within the liquid film and the gas core. For system closure, two different approaches are presented for the calculation of the radial turbulent viscosity distribution within the liquid film and the gas core. The first one combines a k- Ɛ one-equation model and a low Reynolds k-Ɛ model. The second one uses a low Reynolds k- Ɛ model to compute the eddy viscosity profile from the center of the duct right to the wall. Appropriate interfacial values for k e Ɛ are proposed, based on concepts and ideas previously used, with success, in stratified gas liquid flow. The proposed approaches are compared with an algebraic model found in the literature, specifically devised for annular gas liquid flow, using available experimental results. This also serves as a validation of the solution algorithm

Modelagem numérica de escoamento em padrão anular com transferência de calor e massa

Annular flow is the prevailing pattern in transport and energy conversion systems and therefore, one of the most important patterns in multiphase flow in ducts. The correct prediction of the pressure gradient and heat transfer coefficient is essential for optimizing the system s capacity. The objective of this work is to develop and implement a numerical algorithm capable of predicting hydrodynamic and thermal characteristics for upflow, vertical, annular flow. The numerical algorithm is then complemented with the physical modeling of phenomena that occurs in this flow pattern. These are, turbulence, entrainment and deposition and phase change. For the development of the numerical model, axial diffusion of heat and momentum is neglected. In this way the time-averaged equations are solved in their parabolic form obtaining the velocity and temperature profiles for each axial step at a time, together with the global parameters, namely, pressure gradient, mean film thickness and heat transfer coefficient, as well as their variation in the axial direction. The model is validated for the following conditions: fully-developed laminar flow with no entrainment; fully developed laminar flow with heat transfer, fully-developed turbulent flow with entrained drops, developing turbulent annular flow with entrained drops, and turbulent flow with heat transfer and phase change

Desenvolvimento e avaliação de padrão de torque para calibração de torquímetros em três faixas de medição

The continuous development of instruments and equipment used as tools or torque measurement in the industry is demanding more accurate techniques in the use of this kind instrumentation, including development of metrological characteristics in torque measurement. The same happens with the needs in calibration services. There is a diversity of methods of hand torque tools in the market with different measuring range but without complaining with technical standards in terms of requirements of quality and reliability. However, actually there is no choice of a torque measuring standard that fulfils, with low cost, the needs for the calibration of hand torque tools in a large number of ranges. The objective of this thesis is to show the development and evaluation of a torque measuring standard device with a conception to allow the calibration of hand torque tools with three levels of torque with an single instrument, promoting reduction of costs and time in the calibration, also offering reliability for the evaluation of torque measuring instrument. To attend the demand in the calibration of hand torque tools it is necessary that the calibration laboratories have a big collection of torque measuring standards, to fulfills the needs of the costumer, what is very costly. The development of this type of torque measuring standard revealed a viable technique and economically making possible the calibration of hand torque tools in different nominal ranges through a single measurement system versatile, efficient and of easy operation

Lixiviação de potássio em função da textura e da disponibilidade do nutriente no solo

O manejo correto da adubação potássica pode minimizar perdas assim como evitar o esgotamento de K do solo. Objetivou-se estudar a dinâmica do K no perfil do solo em função do teor de argila e do teor do nutriente resultantes da adubação da soja. Foram coletados solos de texturas média e argilosa, que vinham sendo adubados com 0, 60, 120, e 180 kg ha-1 de K2O na soja por 6 anos. O experimento foi conduzido em casa de vegetação, em tubos de PVC estratificados nas profundidades de 0-5, 5-10, 10-20, e 20-40 cm. Na superfície das colunas, aplicaram-se mais 80 kg ha-1 de K2O. Durante 16 semanas, foi aplicada, semanalmente, água em quantidade equivalente a 100 mm de chuva. em cada aplicação, o volume de solução percolada foi determinado, assim como as quantidades de K contidas nessa solução. Após a desmontagem das colunas de solo, foram determinados os teores de K trocável e não-trocável nas diferentes profundidades. A percolação de K foi maior no solo de textura argilosa, que tinha mais K disponível devido ao maior efeito residual da adubação potássica anterior. A intensidade de lixiviação foi proporcional ao teor de K disponível, mas inicialmente a lixiviação foi mais intensa no solo mais arenoso, decrescendo com o tempo. No argiloso, as perdas foram mais constantes. Houve proporcionalidade entre teor inicial e lixiviação no perfil do solo, nas duas formas de K e nos dois tipos de solo. Conclui-se que o efeito residual da adubação potássica aumentou as quantidades de K percolado. A movimentação de K no perfil do solo teve boa relação com o teor inicial de K no solo, resultante da adubação potássica anterior nos dois tipos de solo. A passagem de K considerado não-trocável para trocável foi rápida e influenciou na lixiviação.

Níveis crescentes de saturação por bases e desenvolvimento inicial de teca em um latossolo de textura média

Teak is a forest species of high commercial value, but the little knowledge on the behavior of this species in relation to soil acidity is an important factor that may limit its cultivation. The aim of this study was to evaluate the effect of high base saturation on the soil on the initial development of teak (Tectona grandis L.f.). The experiment was conducted in a greenhouse, in plastic containers with capacity of 50 liters. The experimental design was randomized, with five treatments and four replications. The treatments consisted of: natural saturation of the soil and the other treatments with 20 %, 40 %, 60 % and 80 % of saturation. Correcting the soil favored the growth characteristics of all evaluated plant teak. The liming positively affected the uptake of N, P, K, Ca, Mg, B, Cu and Fe, and the nutritional requirements of the species had the following order: N > Ca > K > Mg > P > S > Fe > Mn > B > Zn > Cu. Base saturations above 70 % showed higher plant development.

A construção de modelos situacionais no padrão discursivo narrativa em quadrinhos

The object of this study is the construction of situation models in the discourse pattern comic book narrative, and sits in the field of Cognitive Linguistics. Its main foundations are the notions of embodied mind (LAKOFF; JOHNSON, 1999), mental simulation (BARSALOU, 1999), discourse pattern (DUQUE; COSTA, 2012) and situation models (ZWAAN, 1999). I stem from the hypothesis that the process of meaning construction in narratives is attached to the simulation of space, of time and of the characters goals and actions within the story world, dimensions which make up the situation models elaborated by the reader. The simulation of these experiences during discourse processing originates from the fact of it having an embodied and cultural basis, i.e., upon being confronted with the clues found in the narrative, the cognitive structures that make up the reader s personal and social memories are triggered and make it possible to activate information which in turn refer to his/her physical and social experiences, built up in the environment in which he/she lives. As regards comic book narratives, the construction of situation models is closely related to the recurring activation of certain cognitive structures originating from graphic resources that are typical of that discourse pattern. These conclusions were drawn from the data analysis taken from the work Palestina (SACCO, 2003; 2004; 2011)

O padrão discursivo provérbio numa perspectiva cognitivo-experimental:expressões Idiomáticas em Grande Sertão: Veredas

Este estudio pretende dilucidar las motivaciones que llevan a los lectores del romance Grande Sertão: Veredas a la categorización de ciertas construcciones gramaticales que se encuentran en la obra como proverbiales. Para ello, recurren a la investigación de los procesos cognitivos implicados en la configuración del patrón discursivo proverbio, teniendo como soporte teórico a la Lingüística Cognitiva. En este empeño, nos ancoramos en las nociones de construcciones corporeizadas, simulación mental, frecuencia, patrón discursivo y en la expresión idiomática. Suponemos que los proverbios constituyen un patrón discursivo cristalizado a partir de la recurrencia de uso y, en virtud de eso, indagamos: ¿Qué mecanismos cognitivos son activados por los lectores en el proceso de categorización de las expresiones dichas proverbiales? Motivados por la situación problema presentada, formulamos algunos experimentos con la intención de aclarar las cuestiones investigadas y concluimos que los lectores recurren a constituciones construccionales subyacentes a los proverbios conocidos a través de las interacciones realizadas en su entorno sociocultural, para dar cuenta de la semántica de construcciones inéditas. En ese proceso, los esquemas y frames se activan a través de simulaciones mentales instanciadas por experiencias corporales y culturales, decisivas para la concretización de los procesos de las construcciones proverbiales

Avaliação de clones de borracha natural crua por ensaios padrão e análise dinâmico-mecânica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Acionamento de frames e esquemas no processo de construção de sentidos no padrão discursivo charge por alunos do ensino médio

Our research has as goal to describe and analyze the main processes related to the activation of conceptual domains underlying the comprehension in the discourse pattern cartoons by the students of third grades of high school, at Professor Antonio Basílio Filho School. Theoretically, we are grounded on assumptions of Conceptual Linguistics, whose interest analyzes our cognitive apparatus in correlation with our socio-cultural and bodies experiences. We intend to check how is the process of meaning construction and integration of various cognitive domains that are activated during the reading activity. That s why, we take the concept of cognitive domains as equivalent to the structures that are stored in our memory from our sociocultural and corporeal experiences and they are stabilized, respectively, through the frames and schemas. The activation of these conceptual domains, as evidenced by our data, supports the assumption that previous knowledge from our inclusion in specific sociocultural contexts, concurrently with the functioning of our sensory-motor system are essential during the construction activity direction. With this research, we still intend to present a proposal confront the expectations of responses produced by students from the activation of frames and schemas with our predictions

Correlação entre padrão postural em jovens praticantes do atletismo

O estudo objetivou observar o alinhamento corporal de jovens atletas praticantes de atletismo e analisar a associação de tais padrões dentro e entre os grupos de provas desta modalidade. Participaram 63 atletas de ambos os sexos e o protocolo de coleta para análise postural baseou-se na observação e registro fotográfico com marcações nos principais acidentes ósseos visando à verificação do alinhamento dessas estruturas. Os segmentos considerados para análise foram: tronco, pelve, joelho e tornozelo. Foi utilizado para análise dos dados o teste de Goodman para contrastes entre e dentro de proporções binomiais. Os resultados mostraram que saltadores (58,33%) e arremessadores/lançadores (50,00%) apresentam o tronco em posição mais equilibrada que atletas de resistência (5,56%). Na região do quadril, arremessadores/lançadores apresentaram predomínio de pelve com rotação esquerda (66,67%), enquanto nos saltadores foi observada elevada frequência de anteversão pélvica (58,33%). A observação do joelho revelou altas taxas de normalidade e recurvatum em fundistas, valgo nos arremessadores/lançadores (50,00%) e varo para os demais grupos. Para a articulação do tornozelo, nota-se que, exceto os saltadores, os grupos apresentaram predominância de valgismo. Conclui-se que, para atender às características particulares de cada prova, níveis distintos de postura são estabelecidos.