436 resultados para Equacoes diferenciais parciais


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Hyphema is an intraocular hemorrhage that can result from many ocular and/or systemic disorders. It is an important clinical sign, since it may appear in the initial stages of some diseases or haematological disorders, acting as an initial marker for early diagnosis. The hematologic disturbances that predispose animals to present hyphema are: Thrombocytopenia, von Willebrand Disease, Scott Syndrome, Disseminated Intravascular Coagulation and Hyperviscosity Syndrome due to Multiple Myeloma. Each of the differential diagnoses due to hematological changes from the appearance of hyphema in dogs shows clinical relevance and particular ocular signs

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The use of physical characteristics for human identification is known as biometrics. Among the many biometrics traits available, the fingerprint is the most widely used. The fingerprint identification is based on the impression patterns, as the pattern of ridges and minutiae, characteristics of first and second levels respectively. The current identification systems use these two levels of fingerprint features due to the low cost of the sensors. However, the recent advances in sensor technology, became possible to use third level features present within the ridges, such as the perspiration pores. Recent studies show that the use of third-level features can increase security and fraud protection in biometric systems, since they are difficult to reproduce. In addition, recent researches have also focused on multibiometrics recognition due to its many advantages. The goal of this research project was to apply fusion techniques for fingerprint recognition in order to combine minutia, ridges and pore-based methods and, thus, provide more robust biometrics recognition systems, and also to develop an automated fingerprint identification system using these three methods of recognition. We evaluated isotropic-based and adaptive-based automatic pore extraction methods, and the fusion of pore-based method with the identification methods based on minutiae and ridges. The experiments were performed on the public database PolyUHRF and showed a reduction of approximately 16% in the EER compared to the best results obtained by the methods individually

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The Canine Visceral Leishmaniasis is a chronic disease of endemic character, caused by Leishmania Chagasi in Americas. The inoculation of the promastigote form in the individual triggers a local and widespread immune reaction with formation of inflammatory infiltrates and deposition of immune complexes in tissues. Initial clinical symptoms of the disease are: weight reduction, hepatomegaly, splenomegaly and, according to the disease chronicity, signs such as alopecia, erythema, onychogryphosis, arthropathies, renal diseases, pyoderma, seborrheic dermatitis, muscle atrophy and Ocular diseases. Ocular diseases are often reported and are result of the direct parasitism or immune-mediated mechanisms caused by the disease. The Leishmania spp have greater affinity for the anterior segment, so that anterior uveitis is one of the most frequently diagnosed injuries. Blepharitis diffuse and Keratoconjunctivitis also appear as important ocular changes. In histological section, inflammatory infiltrates and macrophages with amastigote form are observed in all ocular tissues, with the exception of the retina and optical nerve. In the clinical analysis and disease diagnosis, should be considered the differential diagnosis, such as Ehrlichiosis and systemic hypertension, because these may cause some ocular manifestations similar to those observed in leishmaniasis

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The aim of this work is to analyze the stability of the rotational motion’s artificial satellite using the Routh Hurwitz Algorithm (CRH) and the quaternions to describe the satellite’s attitude. This algorithm allows the investigation of the stability of the motion using the coefficients of the characteristic equation associated with the equation of the rotational motion in the linear form. The equations of the rotational motion are given by the four cinematic equations for the quaternion and the three equations of Euler for the spin velocity’s components. In the Euler equations are included the components of the gravity gradient torque (TGG) and the solar radiation torque (TRS). The TGG is generated by the difference of the Earth gravity force direction and intensity actuating on each satellite mass element and it depends on the mass distribution and the form of the satellite. The TRS is created by changing of the linear momentum, which happens due to the interactions of solar photons with the satellite surface. The equilibrium points are gotten by the equation of rotational motion and the CRH is applied in the linear form of these equations. Simulations are developed for small and medium satellites, but the gotten equilibrium points are not stable by CRH. However, when some of the eigenvalues of the characteristic equation are analyzed, it is found some equilibrium points which can be pointed out as stables for an interval of the time, due to small magnitude of the real part of these eigenvalue

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Pyometra occurs when bacteria colonize the uterus that is under the progesterone dominance. The diagnosis can be carried out based on anamnesis, clinical signals, physical examination and laboratory findings. The prognostic of this desease is relative when the medical therapy is used as an option. The best prevention is the surgery. The present report has an objective accomplishes a literature revision it informs on the pathology in subject gathering the available information regarding the several etiologies of that desease, diagnosis, differential diagnosis, complemental exams and treatment

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Systhemic lupus erythematous is a imunomediated disorder witch affects primarly dogs between two and nine years. Clinical manifestations are very diverse, including renal signs, that may lead to chronic renal disease, and dermatologic and joint sings. Systhemic lupus erythematous diagnostic is a challange to the clinician, due to its diverse list of differecial diagnoses and its low availability of specific tests. The treatment consists of corticosteroids and imunomodulators, and supportive therapy that inhibits the progression of the disease. Monitoring the animal with systhemic lupus erythematous is important, due to its recurrent caracteristic

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The Hyperadrenocorticism is a disease that occur in dogs between mead to old age, is associated with the higher level of glucocorticoid that result in a corporal reaction. To make a diagnostic of this disease is necessary have a good history and physical examination, the principals complains of the proprietary are polyuria, polydipsia and polyphagia, in some times abdominal enlargement and lethargy. In the physical examination is observed this abdominal enlargement, hepatomegaly, alopecia, in some cases pyoderma and difficult respiratory. From this documents is possible determinate the differential diagnostics and with the tests find the diagnostic of the disease that the animal have. The base methods are hemogram, biochemical, urinalysis, radiographs and ultrasonography it’s possible do tomography and magnetic resonance too. There are confirmation methods too, they are very important, because the others not have documents necessary for the final diagnostic. Those are Urine cortisol to creatinine ratio, dexamethasone suppression test with high dose or low dose and ACTH stimulation test. Despite those tests have high sensibility and specificity, they can result in false positive or false negative, this is one of the causes to do the base methods and together make the veterinary doctor find the solution of the diagnostic and do the adequate treatment

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The process of globalization resulted in a variety of new products emerging. Companies were obliged to find new ways of maintaining the attractiveness for their products to sustain their brands in the economic field. So in this scenario social accountability became an important subject for companies that want to achieve a positive image among consumers. This paper aims to explain how organizational communication is essential to create and manage social accountability in a company. Aiming to explain the relation between organizational communication and social accountability, this final project had three main purposes: establish the connection between organizational communication and social accountability, point out and discuss the main strategies in this communication field, and then propose an action plan for Raízen to solve an established problem in one of its factories

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia Mecânica - FEB

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This article aims at presenting part of the results of a terminological study concerning the sworn translation of enforceable instruments into Portuguese. Our study corpora are comprised of translated documents and texts originally written in English and in Portuguese (bill of lading, invoice and promissory note). The software WordSmith Tools generated the wordlists and we selected the term candidates from these lists. The proposed glossaries presents, apart from simple terms, fixed or semi fixed expressions, the cotext (text around the search word) extracted from the studied corpora. It was observed that most part of the fixed or semi fixed expressions are not shown by the specialty dictionaries.

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The aim of this article is to present part of the results of a study concerning the lexicon employed by students learning Spanish language in a Languages degree (Undergraduate Education program). We describe the use and the context in which two verbal forms occur. We made use of Corpus Linguistics theory in order to compile two corpora of descriptive and argumentative compositions and observe the use of two Spanish verbs (haber and tener – third person singular). 250 compositions from first and second year students were collected. The WordSmith Tools software was applied to generate the list of words and the list of concordance. The verbal forms hay and tiene were the most used, and in some cases they were applied inappropriately when compared to the traditional Spanish grammar and to an electronic corpus. The results were discussed in class and were important to raise consciousness in relation to the students’ textual production.

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Neste artigo, temos por objetivo apresentar resultados parciais de um projeto de pesquisa institucional em Linguística Aplicada, no qual se busca compreender como ocorre a prática inicial docente em contextos diversamente configurados de ensino/aprendizagem de língua estrangeira (presencial e virtual), bem como de que maneira esses contextos podem se favorecer mutuamente e favorecer a formação reflexiva e crítica do professor de línguas, em/para um mundo contemporâneo. É possível perceber a atitude reflexiva de uma professora de língua estrangeira em formação inicial, especialmente quanto a ensinar e aprender línguas tipologicamente próximas como o português e o espanhol. Os resultados indicam que a experiência de vivenciar a dinâmica de um contexto didático convencional de ensino de línguas (sala de aula), ao lado da experiência de ensinar sua língua materna em um contexto de configurações didáticas inovadoras (teletandem), foi especialmente importante para a formação crítica da futura professora de línguas e para a conscientização sobre a prática de ensinar línguas irmãs em tempos de inovação tecnológica.

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This text, supported by the Social Representations Theory (SRT), reports some results of a research with students from the 1st/4th years of the College of Sciences and Technology from the State University of São Paulo (FCT-Unesp) on the teacher’s work/identity. We applied 278 questionnaires (free association questions on the teacher’s work and profile). Two groups with former students (five with teaching degrees and four with degrees in Education) were organized. We analyzed issues regarding the choice for the teaching profession (Geography - 3; Math - 04; Physical Education - 01 and Pedagogy – 10). Partial results: 1. There are differences between the social representations of students enrolled in Teaching and Education courses; 2. These people say the profession requires dedication and commitment; 3. They establish a strong relationship between career choice and the “taste” for the profession; 4. They believe that their role is greatly challenging: it involves helping prospective students and commitment to the school.

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The friction phenomena is present in mechanical systems with two surfaces that are in contact, which can cause serious damage to structures. Your understanding in many dynamic problems became the target of research due to its nonlinear behavior. It is necessary to know and thoroughly study each existing friction model found in the literature and nonlinear methods to define what will be the most appropriate to the problem in question. One of the most famous friction model is the Coulomb Friction, which is considered in the studied problems in the French research center Laboratoire de Mécanique des Structures et des Systèmes Couplés (LMSSC), where this search began. Regarding the resolution methods, the Harmonic Balance Method is generally used. To expand the knowledge about the friction models and the nonlinear methods, a study was carried out to identify and study potential methodologies that can be applied in the existing research lines in LMSSC and then obtain better final results. The identified friction models are divided into static and dynamic. Static models can be Classical Models, Karnopp Model and Armstrong Model. The dynamic models are Dahl Model, Bliman and Sorine Model and LuGre Model. Concerning about nonlinear methods, we study the Temporal Methods and Approximate Methods. The friction models analyzed with the help of Matlab software are verified from studies in the literature demonstrating the effectiveness of the developed programming