oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 67 )

2019 ( 412 )

2018 ( 572 )

2017 ( 606 )

Custom range...

Search Results: 1 - 10 of 382124 matches for " R. de;Biazotto "
All listed articles are free for downloading (OA Articles)
Page 1 /382124
Display every page Item
Speed Control of an Autonomous Mobile Robot: Comparison between a PID Control and a Control Using Fuzzy Logic
Silveira, P. E.;Souza Jr., R. de;Biazotto, V. M.;
Journal of the Brazilian Society of Mechanical Sciences , 2002, DOI: 10.1590/S0100-73862002000200008
Abstract: an autonomous mobile robot battery driven, with two traction wheels and a steering wheel is being developed. this robot central control is regulated by an ipc, which controls every function of security, steering, positioning localization and driving. each traction wheel is operated by a dc motor with independent control system. this system is made up of a chopper, an encoder and a microcomputer. the ipc transmits the velocity values and acceleration ramp references to the pic microcontrollers. as each traction wheel control is independent, it's possible to obtain different speed values for each wheel. this process facilities the direction and drive changes. two different strategies for speed velocity control were implemented; one works with pid, and the other with fuzzy logic. there were no changes in circuits and feedback control, except for the pic microcontroller software. comparing the two different speed control strategies the results were equivalent. however, in relation to the development and implementation of these strategies, the difficulties were bigger to implement the pid control.
Speed Control of an Autonomous Mobile Robot: Comparison between a PID Control and a Control Using Fuzzy Logic
Silveira P. E.,Souza Jr. R. de,Biazotto V. M.
Journal of the Brazilian Society of Mechanical Sciences , 2002,
Abstract: An Autonomous Mobile Robot battery driven, with two traction wheels and a steering wheel is being developed. This Robot central control is regulated by an IPC, which controls every function of security, steering, positioning localization and driving. Each traction wheel is operated by a DC motor with independent control system. This system is made up of a chopper, an encoder and a microcomputer. The IPC transmits the velocity values and acceleration ramp references to the PIC microcontrollers. As each traction wheel control is independent, it's possible to obtain different speed values for each wheel. This process facilities the direction and drive changes. Two different strategies for speed velocity control were implemented; one works with PID, and the other with fuzzy logic. There were no changes in circuits and feedback control, except for the PIC microcontroller software. Comparing the two different speed control strategies the results were equivalent. However, in relation to the development and implementation of these strategies, the difficulties were bigger to implement the PID control.
Aplica es de gráficos táteis de histogramas e setogramas para alunos cegos e de baixa vis o: uma prática inclusiva
Bruno Zucherato,Rodolfo Ferreira Biazotto,Maria Isabel Castreghini de Freitas
Revista Ciência em Extens?o , 2010,
Abstract: Introdu o: As políticas inclusivas atuais apontam para a inclus o de alunos especiais na rede regular de ensino, o que exige por parte dessas institui es uma certa adequa o de seus conteúdos e materiais de aprendizado. Atentando a essa demanda o projeto de extens o “Cartografia Tátil e Mapavox: uma alternativa para constru o de mapas e jogos táteis” vem acompanhando as atividades ligadas ao ensino de geografia da escola EMIEE “Maria Aparecida Muniz Michelin – José Benedito Carneiro” Deficientes Auditivos e Deficientes Visuais – EE - Araras, SP. Desenvolvendo materiais que auxiliem no ensino com a produ o de maquetes, mapas, jogos e gráficos táteis. Objetivos: O objetivo deste trabalho é apresentar os resultados das práticas realizadas na área de estudo no que se referem aos gráficos táteis: histogramas e setogramas, apresentando as técnicas utilizadas na produ o do material, como uma alternativa de ensino para deficientes visuais, o trabalho teve como subsídio a inicia o científica desenvolvida na mesma temática denominada “O estudo sobre a utiliza o de gráficos e mapas temáticos táteis por alunos cegos e de baixa vis o”. Métodos: A metodologia utilizada para a constru o do material tátil consistiu na inser o dos alunos em um processo de pesquisa, incluindo-os na elabora o do material, coletando os dados que seriam representados nos gráficos, organizando esses dados e construindo o gráfico, esse processo acaba viabilizando uma integra o entre a forma o do conceito espontaneo em integra o com a forma o do conceito mediado. Todas as etapas de constru o dos gráficos transmitidas aos alunos foram anteriormente testadas em laboratório, buscando respeitar a apreens o dos alunos acerca da realidade, atentando para a agradabilidade das texturas, o contraste das cores bem como do tamanho e a forma do material utilizado e construído. Resultados: O material construído se apresentou satisfatório com rela o aos objetivos propostos, o conjunto construído mostrou que a alternativa utilizada para o ensino de deficientes visuais: cegos e de baixa vis o é válida, sendo que os alunos ao participarem da elabora o do conteúdo teórico do material, apreenderam o conhecimento transmitido. Atualmente se encontra em fase de elabora o a inser o de recursos sonoros no material didático construído, bem como a elabora o de um caderno guia para transmitir as idéias e técnicas elaboradas pela pesquisa para professores de educa o convencional e especial.
Estoicismo e imperium: a virtus do homem político romano = Stoicism and imperium: the virtus of the roman political man.
Renata Lopes Biazotto Venturini
Acta Scientiarum : Education , 2011,
Abstract: Esse artigo tem como objetivo estudar as rela es entre o Estoicismo e o Principado, a partir da leitura da correspondência pliniana. Plínio, o Jovem era originário de uma família equestre que ascendeu ao senado. Após ter exercido uma oposi o política moderada sob o reinado do imperador Domiciano, ela se tornou um dos ideólogos e um dos participantes mais ativos do poder imperial durante o reino de Nerva e de Trajano. Como homem político exaltou a virtus encontrando respaldo no mos maiorum (tradi o), e na modera o estóica. Dirigente de um círculo cultural e político e amigo íntimo de Trajano, Plínio ilustrou a ótica do imperador, sobretudo a ideologia de um grupo senatorial de concilia o permanente entre a cúria e o príncipe, buscando legitimar a política do César e orientar os interesses senatorias. The objective of this article is to study the relationships between Stoicism and the Principate by reading letters by Pliny. Pliny the Younger came from an equestrian family that rose to the senate. After opposition under the reign of Emperor Domitian, it became one of the ideologues and most active participants in imperial power during the reign of Nerva and Trajan. As a political man, he extolled virtus, finding support in the mos maiorum (tradition), and stoic moderation. Leader of a cultural and political circle and close friend to Trajan, Pliny illustrated the Emperor's views, particularly the ideology of a senatorial group for permanent conciliation between the Curia and the prince, seeking to legitimize the politics of the Ceaser and guide senatorial interests.
Estudo da conectividade entre o nervo occipital maior e estruturas adjacentes considera??es anátomo-clínicas
Tanaka, Clarice;Biazotto, Walter;Chopard, Renato P.;Miranda Neto, Marcílio Hubner de;Lucas, Guilherme de Araújo;
Arquivos de Neuro-Psiquiatria , 1991, DOI: 10.1590/S0004-282X1991000100010
Abstract: in order to offer anatomical basis that aid for clinical interpretation of headache of cervical origin a macro-mesoscopic study of greater occipital nerve and its subcutaneous rise out site was accomplished. the authors observed that in its course this nerve delineates angles and direction shifts that can stand for critical points in etiology of occipital pain, so that in its subcutaneous rise out region both occipital artery and vein shape the vasculo-nervous bundle wrapped by sheath of fibrous connective tissue which has continuity and contiguity relation with the adjoining epimysium and perimysium. from our results, anatomo-clinical aspects are discussed.
Arachnoid granulation affected by subarachnoid hemorrhage
Chopard, R.P.;Brancalh?o, R.C.;Miranda-Neto, M.H.;Biazotto, W.;
Arquivos de Neuro-Psiquiatria , 1993, DOI: 10.1590/S0004-282X1993000400005
Abstract: the purpose of this study was to investigate using light microscopy the fibro-cellular components of arachnoid granulations affected by mild and severe subarachnoid hemorrage. the erythrocytes were in the channels delimitated by collagenous and elastic bundles and arachnoid cells, showing their tortuous and intercommunicating row from the pedicle to the fibrous capsule. the core portion of the pedicle and the center represented a principal route to the bulk outflow of cerebrospinal fluid and erythrocytes. in the severe hemorrhage, the fibrocellular components are desorganized, increasing the extracellular channels. we could see arachnoid granulations without erythrocytes, which cells showed big round nucleous suggesting their transformation into phagocytic cells.
Time delay in non-lethal infectious diseases  [PDF]
R. De Luca
Natural Science (NS) , 2012, DOI: 10.4236/ns.2012.48075
Abstract: The effects of the incubation period q on the dynamics of non-lethal infectious diseases in a fixed-size population are studied by means of a delay differential equation model. It is noted that the ratio between the quantity q and the time τ for recovering from the illness plays an important role in the onset of the epidemic breakthrough. An approximate analytic expression for the solution of the delay differential equation governing the dynamics of the system is proposed and a comparison is made with the classical SEIR model.
Trauma de duodeno: análise de fatores relacionados à morbimortalidade
Fraga, Gustavo Pereira;Biazotto, Guilherme;Villa?a, Marcelo Pinheiro;Andreollo, Nelson Adami;Mantovani, Mario;
Revista do Colégio Brasileiro de Cirurgi?es , 2008, DOI: 10.1590/S0100-69912008000200006
Abstract: background: duodenal injuries remain one of the most complex challenges for trauma surgeons. the aim of this study is to evaluate factors that predict morbidity and mortality for duodenal trauma patients. methods: a registry-based retrospective analysis of data identified 77 patients with duodenal injuries in a university hospital from january 1990 to december 2005. grade i injuries were excluded. results: the injury trauma mechanism was penetrating in 87% and blunt in 13%. there was no difference in mortality based on trauma mechanisms. delayed operation more than 6 hours after injury was observed in 7.8% of patients, and it was not related to patient outcomes. we performed primary simple repair for duodenal injury in 84.4% and complex repair in 15.6% of the patients. the latter had higher morbidity. mean ati was 34.5 and mean iss was 22.8. overall morbidity and mortality rate were, respectively, 61% and 27.3%. most of no survivors were with hypovolemic shock at admission, they had lower rts, higher ati and iss, and they had lower triss than survivors. hypovolemic shock, altered rts, associated injuries, and probability of survival less than 50% were independently factors related to death. conclusion: morbidity following duodenal trauma was more dependent on associated intra-abdominal injuries, abdominal contamination and complex repair. physiologic presentation, associated injuries (iss > 25), and triss were important factors for predicting morbidity and mortality for traumatic duodenal injuries.
The use of pyloric exclusion for treating duodenal trauma: case series
Fraga, Gustavo Pereira;Biazotto, Guilherme;Bortoto, José Benedito;Andreollo, Nelson Adami;Mantovani, Mario;
Sao Paulo Medical Journal , 2008, DOI: 10.1590/S1516-31802008000600009
Abstract: context and objectives: significant controversy exists regarding the best surgical treatment for complex duodenal injuries. the aims of this study were to report on a series of eight cases of duodenal repairs using pyloric exclusion and to describe reported complications or improvements in clinical outcomes among patients with complex duodenal trauma. design and setting: cross-sectional study followed by a case series in a university hospital. methods: data on eight patients with duodenal trauma who underwent pyloric exclusion over a 17.5 year period were collected and analyzed. results: the causes of the injuries included penetrating gunshot wounds (gsw) in five patients and motor vehicle accidents (blunt trauma) in three patients. the time elapsed until surgery was longer in the blunt trauma group, while in one patient, the gunshot injury was initially missed and thus the procedure was carried out 36 hours after the original injury. the injuries were grade iii (50%) or iv (50%) and the morbidity rate was 87.5%. four patients (50%) died during the postoperative period from complications, including hypovolemic shock (one patient), sepsis (peritonitis following the missed injury) and pancreatitis with an anastomotic fistula (two patients). conclusions: pyloric exclusion was associated with multiple complications and a high mortality rate. this surgical technique is indicated for rare cases of complex injury to the duodenum and the surgeon should be aware that treatment with a minimalistic approach, with only primary repair, may be ideal.
Ethical Decision-Making in Clinical Nutritional Practice  [PDF]
Fran?ois P. R. de Villiers
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.26089
Abstract: Ethics requires a critical evaluation of assumptions and arguments about norms and values; what should be done and what should not. Practitioners should practice ethically, and the professions should be at the forefront of applied ethics. There are four principles, patient autonomy, beneficence, non-maleficence and justice, which are guides to ethical day-to-day practice. Patient autonomy: Autonomy means self-rule by persons of their thoughts and actions. Patient autonomy requires the practitioner to realise that patients have the right to be involved in decision-making on their own behalf. Beneficence refers to the duty of the practitioner to do the best for the patient. The benefits of breast-feeding are many, and the eventual outcome on health enormous. Nevertheless, health-care workers are diffident in promoting breast-feeding, and readily accept excuses for not breast-feeding, contrary to the principle of beneficence. Non-maleficence refers to the duty of the practitioner not to do harm; it requires the practitioner to withhold harmful therapies; Vitamin E, for example, has been proven to be ineffective as an antioxidant in humans, and large doses have been proven to increase mortality. Yet these are the doses available in supermarkets and “Health shops”. Nutritionists should actively advise against harmful “dietary supplementation”. Distributive justice requires every patient to have an equal opportunity to obtain appropriate therapy. There are relatively few nutritionists and dieticians in South Africa, and indeed in the entire African continent, but proportionately even fewer in the areas of greatest need. A case illustrates the application of these ethical principles to show how they can be applied to our daily practice. Using these four principles is a practical approach to solving ethical dilemmas.
Page 1 /382124
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.