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Search Results: 1 - 10 of 71073 matches for " André Augusto Rodrigues dos Santos "
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Fossiliferous Localities of the Pirabas Formation (Lower Miocene)
Vladimir de Araújo Távora,André Augusto Rodrigues dos Santos,Raphael Neto Araújo
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2010,
Abstract: The Pirabas Formation occurs in twenty-seven geographic localities in the Pará, Maranh o and Piauí states, where has been recorded in outcrops along coastal cliffs, roadcuts, mines and in the underground. In this paper, for the first time, the localities were located in map and georeferentiated, its macrofossiliferous content recorded, and the researchers that studied the specific geographic village were listed.
Mercado de capitais: racionalidade versus emo??o
Santos, José Odálio dos;Santos, José Augusto Rodrigues dos;
Revista Contabilidade & Finan?as , 2005, DOI: 10.1590/S1519-70772005000100008
Abstract: the price fluctuation of assets negotiated in capital and financial markets has been the subject of a theoretical dispute between different methodological streams: some researchers understand that prices are determined at random, based on new information, and that investors decide rationally, according to the principles of efficient market theory. on the other hand, other researchers consider that reality is far more complex, so that no one is able to envisage all variables when investing, and that emotional factors play an important role in investors' decision. the latter support the behavioral finance theory. this article points out the main characteristics of efficient markets and presents some anomalies that are widely discussed among researchers to refute market efficiency.
O modelo kmv e sua utilidade no processo de análise do risco de crédito El modelo kmv y su utilidad en el proceso de análisis de riesgo de crédito Kmv model use for credit risk analysis
José Odálio dos Santos,José Augusto Rodrigues dos Santos
Rege : Revista de Gest?o , 2009,
Abstract: O presente artigo aborda e analisa os fundamentos teóricos de uma das metodologias de cálculo do risco de crédito, o Modelo KMV. A avalia o do risco de crédito é uma ferramenta utilizada pelas áreas de gerenciamento para medir a probabilidade de default de empresas, que surge quando o tomador n o possui capacidade ou vontade de cumprir o contrato assumido. O Modelo KMV destaca a relevante contribui o das informa es disponíveis no mercado sobre os pre os dos ativos para determinar a probabilidade de default. A empresa é avaliada como uma op o representada pelos seus ativos a valor de mercado, os quais poder o ser entregues aos credores sempre que o valor de mercado de suas dívidas superar o valor de suas expectativas de gera o de caixa. O objetivo deste artigo é apresentar o conceito, o cálculo, a rela o com o mercado eficiente e a interpreta o dos resultados do Modelo KMV, a partir da estimativa da probabilidade de insolvência e do mapeamento do campo entre o ponto de default e a distancia da empresa em rela o a esse referencial. El presente artículo aborda y analiza los fundamentos teóricos de una de las metodologías de cálculo de riesgo de crédito, Modelo KMV. La evaluación del riesgo de crédito es una herramienta utilizada por las áreas de gestión para medir la probabilidad de default de empresas, que aparece cuando el tomador no posee capacidad o voluntad para cumplir el contrato asumido. El Modelo KMV destaca la relevante contribución de las informaciones disponibles en el mercado sobre los precios de los activos para determinar la probabilidad de default. La empresa es evaluada como una opción representada por susactivos a valor de mercado, los que podrán entregarse a los creedores siempre que el valor de mercado de sus deudas superar el valor de sus expectativas de generar caja. El objetivo de este artículo es presentar el concepto, el cálculo, la relación con mercado eficiente y la interpretación de los resultados del Modelo KMV, a partir de la estimativa de la probabilidad de insolvencia y de la cartografía entre el punto de default y cuanto distante la empresa se presenta de este referencial. This article analyzed the theoretical foundations of a method for calculation of credit risk, the KMV Model. Evaluation of credit risk is used to measure probability of default when a company no longer has the ability or willingness to meet a contractual commitment. This Model highlights the contribution of information on asset prices available in the market, to measure this probability. The company is evaluated as an option represented by the ass
Estenose carotídea acima de 70% em pacientes no pré-operatório de cirurgia da aorta abdominal: freqüência e fatores de risco
Ferreira, André Ventura;Santos, Vanessa Prado dos;Caffaro, Roberto Augusto;
Jornal Vascular Brasileiro , 2006, DOI: 10.1590/S1677-54492006000100004
Abstract: objective: to analyze the frequency and risk factors of carotid stenosis above 70% in patients undergoing abdominal aortic reconstruction. material and method: ninety-four patients who underwent doppler ultrasound preoperative screening for abdominal aortic surgery between january 2000 and january 2003 were analyzed by the vascular surgery unit of the santa casa of s?o paulo (faculty of medical sciences). results: sixty-seven (71%) patients were male. of the 94 patients, 42 (44.6%) had aortoiliac occlusive disease and 52 (53.4%) had abdominal aortic aneurysm. the data analysis showed a prevalence of carotid stenosis above 70% in 8.33% of patients with abdominal aortic aneurysms and 13.51% in patients with aortoiliac occlusive disease, a difference without statistical significance (p = 0.5). the previous history of cerebral ischemic symptoms (stroke and transitory ischemic attack) was predictive of the presence of a 70-99% carotid stenosis. other risk factors for atherosclerosis, such as being male, having diabetes, hypertension and smoking history, were not predictive of the presence of a carotid stenosis above 70%. conclusion: the frequency of carotid stenosis above 70% in patients undergoing abdominal aortic surgery is 9.57% and the presence of transitory ischemic attack or stroke in medical history was predictive of stenosis above 70% in this group of patients.
VEGF System in Dog’s Thymus—Temporal Expression  [PDF]
Fernanda Rodrigues Agreste, Pedro Primo Bombonato, Kaique Nogueira, Anna Clara dos Santos, André Rodrigues da Cunha Barreto-Vianna, Eduardo Maurício Mendes de Lima
Open Journal of Veterinary Medicine (OJVM) , 2015, DOI: 10.4236/ojvm.2015.510028
Abstract: Given the importance of the thymus to the immune system and the limited knowledge about its development and involution processes, this study evaluated the expression of the vascular endo-thelial growth factor, a key angiogenic factor for the formation of vascular tissue bed and modulation of functions related to cell proliferation and migration, hormone synthesis, and immunomodulation. In this study, thymus samples of dog fetuses (30, 40, 50 and 60 days old), and young (180 days old) and adult (365 days old) dogs were submitted to real-time PCR and Western blot. Time-dependent changes were observed for proteins and genes associated with the development of the vascular system, such as VEGF-A, VEGF-C, Flt-1, KDR, FLT-4, and EG-VEGF. This result demonstrates that these system components play different roles during development and involution of the thymus. Possible functions, such as the modulatory effect on vasculogenesis and microenvironment, influence the proliferation and differentiation of thymocytes, T cells maturation, cell-cell interaction and hormone secretion.
The Knowledge and Participation of the Father in Breast Feeding, Salvador, Brazil  [PDF]
Fernanda Tourinho Lima, Andréa Canário Santana, Gilton Marques dos Santos, Tatiane Falc?o dos S. Albergaria, Luciana Rodrigues Silva
Open Journal of Obstetrics and Gynecology (OJOG) , 2016, DOI: 10.4236/ojog.2016.610072
Abstract: The most fundamental influence in the breastfeeding process is the fathers support. The mother feels safer in breastfeeding when she has her partners support and a more active and effective participation. This study aimed at evaluating the fathers knowledge about breastfeeding in a quantitative approach through a transversal cohort study, interviewing 78 fathers in a public maternity in Salvador. The average age of the interviewees was 29.9 years and 53.8% had an incomplete fundamental schooling. Regarding knowledge of the subject, 10.3% believed that breastfeeding can be substituted. All fathers interviewed answered that they support breastfeeding for their children and believe in its benefits; 39.7% reported that their opinion could interfere their partners decision to prolong the process. Moreover, 69.2% of the males attended their partners antenatal meetings, and of these, over a third had no intervention on the subject. Of all the participants, 80.8% confirmed that they had participated in the breastfeeding process and emphasized their gratification during this phase. About the paternal opinion, 39.7% believed that there is a degree of influence over the partners decision to breastfeed, and for that reason 50% told the mother their opinion. The study widened the knowledge about the role of the
Production of a low young modulus titanium alloy by powder metallurgy
Santos, Dalcy Roberto dos;Henriques, Vinicius André Rodrigues;Cairo, Carlos Alberto Alves;Pereira, Marcelo dos Santos;
Materials Research , 2005, DOI: 10.1590/S1516-14392005000400014
Abstract: titanium alloys have several advantages over ferrous and non-ferrous metallic materials, such as high strengthto-weight ratio and excellent corrosion resistance. a blended elemental titanium powder metallurgy process has been developed to offer low cost commercial products. the process employs hydride-dehydride (hdh) powders as raw material. in this work, results of the ti-35nb alloy sintering are presented. this alloy due to its lower modulus of elasticity and high biocompatibility is a promising candidate for aerospace and medical use. samples were produced by mixing of initial metallic powders followed by uniaxial and cold isostatic pressing with subsequent densification by isochronal sintering between 900 up to 1600 °c, in vacuum. sintering behavior was studied by means of microscopy and density. sintered samples were characterized for phase composition, microstructure and microhardness by x-ray diffraction, scanning electron microscopy and vickers indentation, respectively. samples sintered at high temperatures display a fine plate-like a structure and intergranular b. a few remaining pores are still found and density above 90% for specimens sintered in temperatures over 1500 °c is reached.
An Online mtDNA Tool for Identification of Neotropical Psittacid Species and Taxonomic Issues: A Study Case of the Amazona ochrocephala Complex  [PDF]
Anderson Vieira Chaves, R.O.P. Queiroz-Filho, Fabiano Augusto Assun??o Silva, Cristina Yumi Miyaki, Fabrício Rodrigues dos Santos
Natural Resources (NR) , 2014, DOI: 10.4236/nr.2014.511056
Abstract:
Parrots are among the most popular pets in the world and they are also some of the most illegally traded, particularly in Brazil. Some computational tools were recently developed by researchers based on molecular databases for taxonomy support, forensic identification and conservation purposes. In this study, the DNA Surveillance platform was used to build an online database tool for molecular identification of Brazilian Psittacids using DNA sequences of six mitochondrial genes. To illustrate possible taxonomic issues of the online tool due to interspecific hybridization or unresolved taxonomy, we focused on Amazona aestiva that is considered as one of the most common parrots in Brazil, commonly bred as pets, and considered to be part of a species complex with Amazona ochrocephala from South America. We provide three curated sequence databases, which allow the species identification of individuals or tissue samples of birds of the Psittacidae family using mitochondrial DNA markers, and a comprehensive description of a taxonomic issue involving the A. ochrocephala complex. The results obtained corroborate previous studies suggesting that these species are not reciprocally monophyletic, due to either an ancient hybridization in central Brazil, or, they maybe just are morpho-varieties of the same species. Alternatively, if A. aestiva and A. ochrocephala were considered as sister species, the data could be interpreted either as a result of secondary contact or incipient speciation. Beyond the use of mtDNA for species identification, the high mtDNA haplotype diversity observed in A. aestiva indicates its potential use in discrimination of lineages that could be an important auxiliary tool to certify the captive origin of legally commercialized parrots.
Coloniza??o natural por espécies nativas e exóticas das encostas degradadas da Serra do Mar
Santos Junior, Nelson Augusto dos;Cardoso, Victor José Mendes;Barbosa, José Marcos;Rodrigues, Maurício Augusto;
Revista árvore , 2010, DOI: 10.1590/S0100-67622010000200009
Abstract: the landslides are inherent events to the dynamics of the serra do mar, in the stretches most declivous. however, some factors of intervention, such as atmospheric pollution, occupation of the base of the mounts, among others, increase the incidence of this event. furthermore, the present study aimed to evaluate the settling dynamics of degraded areas of hillsides, aiming for a restoration. two experimental areas were adopted, in stretches of the serra do mar, next to the baixada santista where parcels of one m2 had been launched, and phytosociological data was obtained. after that, the areas were cleaned and the same parameters of the initial evaluation were registered, monthly, during 1 year. twenty species were found, pertaining to 14 families, in its majority exotic or not-regional native species.
Avalia??o da chuva de sementes em áreas de restinga em diferentes estágios de regenera??o
Rodrigues, Maurício Augusto;Paoli, Adelita Aparecida Sartori;Barbosa, José Marcos;Santos Junior, Nelson Augusto dos;
Revista árvore , 2010, DOI: 10.1590/S0100-67622010000500007
Abstract: this study was conducted in an area of restinga in the municipality of s?o vicente (sp). the study aimed to evaluate the seed rain in three different conditions of regeneration. was selected the following conditions: high forest of restinga in the middle stage of regeneration, an area of clearing in the same condition mentioned above and a third in early stages of regeneration. in each condition were installed 10 seed collectors made of wood and screen with 80% of shade, supported to a height of 20cm of soil. they were evaluated monthly for one year, the densities of seed deposited in the collector, these seedlings are identified and categorized based on their dispersion syndrome and successional classes. the area of high forest area was carried out a phytosociological survey to identify which seedlings present in the rain could be from these areas. it was found that the densities of seedlings are relatively low compared to other formations of the atlantic rain forest, but consistent with other studies of the same type of vegetation used in the study. regarding dispersal syndromes and successional classes, there was prevalence of the zoocoric syndrome and species of secondary successional classes. the results indicate that the area has good ability to maintain their succession dynamics.
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