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Search Results: 1 - 10 of 111732 matches for " Tarri?o Vinagre "
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Discriminación experimental de los rasgos técnicos en la talla bipolar y a mano alzada en lascas a través los cuarzos de Naibor Soit (Garganta de Olduvai, Tanzania)
Sánchez Yustos, P.,Diez Martín, F,Domínguez Rodrigo, M.,Tarrio Vinagre, A.
Munibe Antropologia-Arkeologia , 2012,
Abstract: La identificación de la talla bipolar puede ser controvertida debido fundamentalmente a la naturaleza petrográfica del cuarzo y a su fracturación heterogénea. Este trabajo pretende superar este problema mediante el desarrollo de un marco explicativo experimental destinado al reconocimiento de los rasgos diagnósticos en las lascas producidas por ambos métodos de talla en la reducción del cuarzo de Naibor Soit (Garganta de Olduvai, Tanzania). El objetivo final de este trabajo es el de utilizar un conjunto de variables relacionadas con la respuesta de esta materia prima a la fractura a mano alzada y bipolar en dos experimentos destinados a individualizar estadísticamente los rasgos técnicos diagnósticos que mejor identifican a la talla bipolar en este tipo de materia prima.
Estudio de la procedencia de los sílex recuperados en el yacimiento de Labeko Koba (Arrasate, País Vasco)
Andoni Tarrio
Munibe Antropologia-Arkeologia , 2000,
Abstract: Se estudia un 17,3% de los fragmentos de sílex recuperados (22.291 unidades) en los cuadros más significativos del yacimiento. Se comprueba que el yacimiento ha recibido aportes de sílex provenientes de tres fuentes principales. Dos del Sur : correspondientes a sílex de Urbasa (50,3 % del total) y sílex de Trevi o (33,0 %) ; mientras que otra del Norte se corresponde con sílex del Flysch (5,6 %). Otro importante grupo de indeterminados (11,6 %) se encuentra compuesto por materiales fuertemente alterados por procesos postdeposicionales. Se analiza la procedencia de los distintos tipos de sílex para cada nivel, tanto de los restos de talla, como de los restos retocados.
Informe preliminar de la 1a campa a de excavaciones en el poblado eneolítico de La Renke (Santurde, Alava).
Luis Ortiz,Antonio Ferreira,Jose M. Tarrio,Pedro J. Lobo
Munibe Antropologia-Arkeologia , 1984,
Abstract: El yacimiento de "La Renke" está situado en tierras de labor donde afloran manchas oscuras de tierra con una cierta disposición estructural. La excavación se inscribe en un plan más amplio de investigación de las formas de habitación fuera de las cuevas durante los períodos del Neolítico hasta la llegada de las poblaciones indoeuropeas. La superficie excavada es un cuadrado de 10 m. de lado. En su lado Sur se practicó un sondeo que proporcionó bajo la capa superficial revuelta, un nivel intacto de unos 70 cm. de espesor. Las estructuras halladas son escasas y poco concretas, reduciéndose a concentraciones aisladas de piedras de tama o medio que podrían ser cu as de sujeción de postes. Los materiales arqueológicos se resumen en: a) Líticos: puntas de flecha, perforadores, raspadores, piezas de hoz, láminas retocadas y piezas pulimentadas. b) Cerámicos: destacando la decoración campaniforme y los fragmentos de colador. c) Metálicos: solamente ha aparecido una punta de bronce. d) Fauna: es muy escasa, destacando los molares de herbívoros. e) Elementos de adorno: dos cuentas de collar y algunos fragmentos de ocre.
Differentiated thyroid cancer in patients with resistance to thyroid hormone syndrome. A novel case and a review of the literature
Jo?o Vinagre,Glaúcia Mazeto,Paula Soares
Frontiers in Molecular Biosciences , 2014, DOI: 10.3389/fmolb.2014.00010
Abstract: Resistance to thyroid hormone (RTH) represents a syndrome in which patients present elevated circulating thyroid hormones in the presence of non-suppressed TSH. We report a novel case where a patient with RTH presented a differentiated thyroid cancer. A19 year-old female had been referred due to thyroid disease that disclosed features characteristic of a RTH. During the follow up it was detected a follicular tumor that led to the recommendation for thyroid surgical ablation, where an incidental papillary thyroid microcarcinoma (mPTC) was found. The increase of thyroglobulin (TG) levels following thyroid removal referred the patient for radioiodine treatment. Post-treatment, it was detected jugular adenopathies and the patient was subjected to cervical lymph node drainage where metastases of the mPTC were found. RTH syndrome was confirmed by the detection of a THRB germline mutation. A BRAF mutation was also found in the mPTC but not detected in the follicular adenoma or normal adjacent tissue. The young age of the patient, the rarity of BRAF mutations in childhood and the high dissemination of the malignancy, lead us to the speculation that increased TSH stimulation in a RTH background and oncogenic activation of BRAF could have served as (co) drivers and might have triggered an advanced stage of the neoplastic disease. These findings together with a review of published cases add novel information to the management of RTH patients with differentiated thyroid cancer.
Evaluation of recommender systems in streaming environments
Jo?o Vinagre,Alípio Mário Jorge,Jo?o Gama
Computer Science , 2015, DOI: 10.13140/2.1.4381.5367
Abstract: Evaluation of recommender systems is typically done with finite datasets. This means that conventional evaluation methodologies are only applicable in offline experiments, where data and models are stationary. However, in real world systems, user feedback is continuously generated, at unpredictable rates. Given this setting, one important issue is how to evaluate algorithms in such a streaming data environment. In this paper we propose a prequential evaluation protocol for recommender systems, suitable for streaming data environments, but also applicable in stationary settings. Using this protocol we are able to monitor the evolution of algorithms' accuracy over time. Furthermore, we are able to perform reliable comparative assessments of algorithms by computing significance tests over a sliding window. We argue that besides being suitable for streaming data, prequential evaluation allows the detection of phenomena that would otherwise remain unnoticed in the evaluation of both offline and online recommender systems.
Lipolysis of emulsion models of triglyceride-rich lipoproteins is altered in male patients with abdominal aorta aneurysm
Hosni, J.J.;Vinagre, C.G.;Mady, C.;Maranh?o, R.C.;
Brazilian Journal of Medical and Biological Research , 2007, DOI: 10.1590/S0100-879X2007000300004
Abstract: disorders of the lipid metabolism may play a role in the genesis of abdominal aorta aneurysm. the present study examined the intravascular catabolism of chylomicrons, the lipoproteins that carry the dietary lipids absorbed by the intestine in the circulation in patients with abdominal aorta aneurysm. thirteen male patients (72 ± 5 years) with abdominal aorta aneurysm with normal plasma lipid profile and 13 healthy male control subjects (73 ± 5 years) participated in the study. the method of chylomicron-like emulsions was used to evaluate this metabolism. the emulsion labeled with 14c-cholesteryl oleate and 3h-triolein was injected intravenously in both groups. blood samples were taken at regular intervals over 60 min to determine the decay curves. the fractional clearance rate (fcr) of the radioactive labels was calculated by compartmental analysis. the fcr of the emulsion with 3h-triolein was smaller in the aortic aneurysm patients than in controls (0.025 ± 0.017 vs 0.039 ± 0.019 min-1; p < 0.05), but the fcr of 14c-cholesteryl oleate of both groups did not differ. in conclusion, as indicated by the triglyceride fcr, chylomicron lipolysis is diminished in male patients with aortic aneurysm, whereas the remnant removal which is traced by the cholesteryl oleate fcr is not altered. the results suggest that defects in the chylomicron metabolism may represent a risk factor for development of abdominal aortic aneurysm.
Efeitos do treinamento resistido na lipoproteína de baixa densidade
Silva, Jeferson Luis da;Maranh?o, Raul Cavalcante;Matos Vinagre, Carmen Guilherme Christiano de;
Revista Brasileira de Medicina do Esporte , 2010, DOI: 10.1590/S1517-86922010000100014
Abstract: the benefits of exercise regular practice are clearly established in the literature. however, the choice of the ideal exercise may be more beneficial for individuals with specific diseases and associated pathologies. the aim of this review was to determine whether resistance training (rt) promotes any change on low density lipoprotein cholesterol. important differences were observed in research protocols, making it difficult to define the benefits of rt in this review. however, it was noticed that rt may be promising in reducing ldl-c levels mainly in adult men and women, in patients with diabetes mellitus type 1 and type 2 and in pre-menopausal women, not presenting differences in the elderly population. it was concluded that the rt is an option good of physical exercise for individuals, especially when the aerobic training (at) is contra-indicated.
Interferências na absor??o de levotiroxina e dificuldades no manuseio de pacientes com hipotireoidismo na unidade de terapia intensiva: relato de dois casos e revis?o de literatura
Vinagre, Ana Lúcia Marinho;Souza, Marcus Vinícius Leit?o de;
Revista Brasileira de Terapia Intensiva , 2011, DOI: 10.1590/S0103-507X2011000200019
Abstract: levothyroxine absorption in hypothyroid patients can be influenced by several factors, particularly medications and concomitant food administration. this is especially evident in intensive care unit patients, where a continual enteral diet and the administration of multiple medications changes its absorption. changes or adaptations in the hypothalamic-pituitary-thyroid axis, in conjunction with clinical abnormalities possibly related to under-treatment of hypothyroidism, render levothyroxine replacement therapy very challenging. here, we report two intensive care hypothyroidism patients and their respective levothyroxine replacement management issues, focusing on a number of controversial issues, such as the optimal replacement dose, how fast the levothyroxine doses should be increased, triiodothyronine requirements, the interference of an enteral diet with absorption, and finally, the possible consequences of undertreated hypothyroidism and levothyroxine replacement monitoring useful clinical/laboratory parameters.
The modelling and analysis of fractional-order control systems in frequency domain
I. Petras,L. Dorcak,P. O'Leary,B. M. Vinagre,I. Podlubny
Mathematics , 2000,
Abstract: This paper deals with fractional-order controlled systems and fractional-order controllers in the frequency domain. The mathematical description by fractional transfer functions and properties of these systems are presented. The new ways for modelling of fractional-order systems are illustrated with a numerical example and obtained results are discussed in conclusion.
A Theory of Routing for Large-Scale Wireless Ad-Hoc Networks
Antonio J. Caama?o,Juan J. Vinagre,Mark Wilby,Javier Ramos
Mathematics , 2006,
Abstract: In this work we develop a new theory to analyse the process of routing in large-scale ad-hoc wireless networks. We use a path integral formulation to examine the properties of the paths generated by different routing strategies in these kinds of networks. Using this theoretical framework, we calculate the statistical distribution of the distances between any source to any destination in the network, hence we are able to deduce a length parameter that is unique for each routing strategy. This parameter, defined as the {\it effective radius}, effectively encodes the routing information required by a node. Analysing the aforementioned statistical distribution for different routing strategies, we obtain a threefold result for practical Large-Scale Wireless Ad-Hoc Networks: 1) We obtain the distribution of the lengths of all the paths in a network for any given routing strategy, 2) We are able to identify "good" routing strategies depending on the evolution of its effective radius as the number of nodes, $N$, increases to infinity, 3) For any routing strategy with finite effective radius, we demonstrate that, in a large-scale network, is equivalent to a random routing strategy and that its transport capacity scales as $\Theta(\sqrt{N})$ bit-meters per second, thus retrieving the scaling law that Gupta and Kumar (2000) obtained as the limit for single-route large-scale wireless networks.
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