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Search Results: 1 - 10 of 135941 matches for " V.; Selva-Vera "
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Motor speed predicts stability of cognitive deficits in both schizophrenic and bipolar I patients at one-year follow-up
J. Salazar-Fraile,V. Balanzá-Martínez,G. Selva-Vera,A. Martínez-Aran
The European Journal of Psychiatry , 2009,
Abstract: Background: We examined whether motor speed assessed by the finger tapping test predicts generalized and specific stable deficits because of a common pathogenic process in bipolar and schizophrenic patients. Methods: One hundred and two patients underwent a battery of neuropsychological tests. Patients with a score of less than one standard deviation from their siblings', sample in two assessments with an interval of one year were defined as suffering from stable deficits because of a common pathogenic process. In addition to univariate analyses, factor analyses, ordinal logistic regression, and multiple linear regressions were used. A general score was also calculated. Results: No differences were found between schizophrenic and bipolar patients in the deficits of verbal fluency, shift reasoning ability and executive attention. Schizophrenic patients had greater persistent cognitive deficit because of a common pathogenic factor in the verbal memory dimension than bipolar patients. Motor speed predicted the specific deficits of verbal fluency, shift reasoning, executive attention and the general deficit of both bipolar I and schizophrenic patients. Bipolar patients suffered a lesser specific deficit in the verbal memory dimension than schizophrenic patients did, this domain not being predicted by motor speed. Motor speed predicted the generalized deficit and the specific dimensions in which schizophrenic and bipolar patients showed no differences. Conclusions: These results suggest the presence of general and specific stable cognitive deficits because of a common pathogenic factor related to psychomotor slowness. Motor speed seems to be suitable endophenocognitype for schizophrenia and bipolar disorder.
Motor speed predicts stability of cognitive deficits in both schizophrenic and bipolar I patients at one-year follow-up
Salazar-Fraile,J.; Balanzá-Martínez,V.; Selva-Vera,G.; Martínez-Aran,A.; Sánchez-Moreno,J.; Rubio,C.; Vieta,E.; Gómez-Beneyto,M.; Tabarés-Seisdedos,R.;
The European Journal of Psychiatry , 2009, DOI: 10.4321/S0213-61632009000300007
Abstract: background: we examined whether motor speed assessed by the finger tapping test predicts generalized and specific stable deficits because of a common pathogenic process in bipolar and schizophrenic patients. methods: one hundred and two patients underwent a battery of neuropsychological tests. patients with a score of less than one standard deviation from their siblings', sample in two assessments with an interval of one year were defined as suffering from stable deficits because of a common pathogenic process. in addition to univariate analyses, factor analyses, ordinal logistic regression, and multiple linear regressions were used. a general score was also calculated. results: no differences were found between schizophrenic and bipolar patients in the deficits of verbal fluency, shift reasoning ability and executive attention. schizophrenic patients had greater persistent cognitive deficit because of a common pathogenic factor in the verbal memory dimension than bipolar patients. motor speed predicted the specific deficits of verbal fluency, shift reasoning, executive attention and the general deficit of both bipolar i and schizophrenic patients. bipolar patients suffered a lesser specific deficit in the verbal memory dimension than schizophrenic patients did, this domain not being predicted by motor speed. motor speed predicted the generalized deficit and the specific dimensions in which schizophrenic and bipolar patients showed no differences. conclusions: these results suggest the presence of general and specific stable cognitive deficits because of a common pathogenic factor related to psychomotor slowness. motor speed seems to be suitable endophenocognitype for schizophrenia and bipolar disorder.
The switch from conventional to atypical antipsychotic treatment should not be based exclusively on the presence of cognitive deficits. A pilot study in individuals with schizophrenia
Gabriel Selva-Vera, Vicent Balanzá-Martínez, José Salazar-Fraile, José Sánchez-Moreno, Anabel Martinez-Aran, Patricia Correa, Eduard Vieta, Rafael Tabarés-Seisdedos
BMC Psychiatry , 2010, DOI: 10.1186/1471-244x-10-47
Abstract: In this naturalistic study, we used a comprehensive neuropsychological battery of tests to assess a sample of schizophrenia patients taking either conventional (n = 13) or novel antipsychotics (n = 26) at baseline and at two years after.Continuous antipsychotic treatment regardless of class was associated with improvement on verbal fluency, executive functions, and visual and verbal memory. Patients taking atypical antipsychotics did not show greater cognitive enhancement over two years than patients taking conventional antipsychotics.Although long-term antipsychotic treatment slightly improved cognitive function, the switch from conventional to atypical antipsychotic treatment should not be based exclusively on the presence of these cognitive deficits.Cognitive disturbances are a core feature of schizophrenia and have been extensively studied in recent years [1]. Cognitive impairment is present before the onset of the illness [2] and is also found in healthy relatives of patients, although to a lesser degree [3]. In addition, this feature is not exclusively secondary to psychiatric symptoms or medication [4]. Cognitive impairment is a better predictor of future functional outcomes compared with positive symptoms [5-7].The positive action of conventional antipsychotics drugs (APDs) on cognition is considered mild or moderate [8] and is limited to certain cognitive domains such as sustained attention [9,10].Regarding novel antipsychotics, this supposed cognitive enhancement would be mediated by their capability to raise the level of dopamine and acetylcholine in prefrontal regions [11]. However, their different affinity for brain receptors may result in different procognitive profiles of each class of antipsychotics. Many studies support a cognitive enhancement of the different atypical antipsychotics: quetiapine and olanzapine [12], quetiapine and risperidone [13], ziprasidone and olanzapine [14]; olanzapine, quetiapine, and risperidone [15], risperidone and quetiap
O livro didático na educa??o infantil: reflex?o versus repeti??o na resolu??o de problemas matemáticos
Brand?o, Ana Carolina;Selva, Ana Coelho V.;
Educa??o e Pesquisa , 1999, DOI: 10.1590/S1517-97021999000200006
Abstract: the article discusses the issue of mathematics textbooks used in child education analyzing specifically textbooks that deal with problem solving. twelve series of textbooks were examined, and the analysis was developed around four pivotal aspects: the form of introduction to the concepts of addition and subtraction, the types of problems proposed, the use of illustrations in the description of the problem, and the type of record asked from children. it has been found that the textbooks examined display little variety with respect to the structure of problems. thus, problems involving addition are limited to structures of combination and transformation, and the majority of subtraction problems are restricted to the structure of transformation. it has been observed that illustrations are often employed to supply the data related to the problem. in many cases, it has been noted that the illustration itself furnishes the answer to the problem. as to the types of record requested from children, it was clear that they are usually limited to writing the data supplied and the answer in predetermined spaces. frequently the sign of the operation "expected" to solve the problem is indicated. the study concludes that the pre-school textbooks analyzed intend to work with the issue of problem solving but the situations proposed are repetitive and do not stimulate children to develop and contrast different strategies of solution.
Removal of Nickel(II) from Aqueous Solutions by Adsorption with Modified ZSM- 5 Zeolites
P. Panneerselvam,V. Sathya Selva Bala,N. Thinakaran,P. Baskaralingam
Journal of Chemistry , 2009, DOI: 10.1155/2009/820923
Abstract:
O livro didático na educa o infantil: reflex o versus repeti o na resolu o de problemas matemáticos
Brand?o Ana Carolina,Selva Ana Coelho V.
Educa??o e Pesquisa , 1999,
Abstract: O artigo analisa livros didáticos de matemática utilizados em salas de educa o infantil, especificamente o tópico de resolu o de problemas de estrutura aditiva. Foram examinadas doze cole es de livros, a partir de quatro eixos: a forma de introdu o aos conceitos de adi o e subtra o; os tipos de problemas propostos; a utiliza o das ilustra es nos enunciados dos problemas; e o tipo de registro solicitado às crian as. Constatou-se que os livros didáticos analisados apresentam uma pequena variedade em rela o à estrutura dos problemas. Assim, problemas envolvendo adi o se limitam às estruturas de combina o e transforma o e a maioria dos problemas de subtra o restringe-se à estrutura de transforma o. Em rela o às ilustra es, observou-se que este recurso é bastante utilizado para fornecer os dados no enunciado do problema. Notaram-se, ainda, vários casos em que a própria ilustra o fornece a resposta. Quanto ao tipo de registro, evidenciou-se que este se limita, geralmente, à solicita o da escrita dos dados e da resposta do problema em espa os previamente determinados. Freqüentemente é indicado o sinal da opera o esperada para a solu o do problema. Conclui-se que os livros didáticos de pré-escola analisados pretendem trabalhar com resolu o de problemas, no entanto, as situa es propostas s o repetitivas e n o estimulam o desenvolvimento e o confronto de estratégias diversas por parte das crian as.
Impact of Geomagnetically Induced Currents Secondary Event on the High-Voltage Synchronous Motors  [PDF]
Vera V. Vakhnina, Aleksey A. Kuvshinov
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510A004
Abstract: It is justified that during geomagnetic storms the high voltage synchronous engines are being impacted by high current harmonics of even sequences powered by power transformer due to geo-induced high voltage currents flowed through the windings. Equivalent circuits of step down substation and HV synchronous motors are made for making it possible to consider a saturation of power transformer magnetic system and higher current harmonics availability in stator windings. Analytic expressions for higher current harmonics and extra capacity losses calculation in stator windings are received, as well as the calculation of induction torques allowing to denote a rate of geomagnetic processes impact on synchronous engine operation at various step down substation parameters.
El control de los agregados monetarios: lecciones y experiencias del caso venezolano reciente
Vera, Leonardo V.;
Economia e Sociedade , 2009, DOI: 10.1590/S0104-06182009000100005
Abstract: this work examines the difficulties and formidable challenges faced by monetary authorities to control the behavior of monetary aggregates in an open economy dependent of an exportable natural resource such as venezuela. the work not only introduces analytical arguments but also provides some empirical evidence that shows the several sources of endogeneity in the monetary base, the multiplier and other wider monetary aggregates in venezuela. though the central bank currently does not announce a clear strategy and target for the practice of monetary policy, we argue that the monetary authority has recently moved towards a strategy of targeting short-term interest rates. presumably, the use of the repo rate as a monetary policy instrument is tied to a final target of economic activity.
THE "NEW IDENTITY" OF THE IMMIGRANTS IN THE UNITED STATES: A STUDY OF TWO POEMS
Vera V. Syamsi
K@ta : a Biannual Publication on the Study of Language and Literature , 2003,
Abstract: The United States of America has long been the land of hopes and dreams. People poured into the country for a better life. The ('native') people of the country have campaigned that everybody is welcome to live and become the citizens there; they also claim that they respect and appreciate human right and do not discriminate people. The two poems analyzed here describe the efforts and struggles of immigrants who came to the United States and tried to become her citizens, a thing that 'in reality' is very difficult and full of obstacles. Those newcomers were hampered by many things, both from the things outside and inside them. Immigrants who now live in USA write the two poems and they are interesting to be analyzed, as they picture experiences and struggles of migrants living in a new country
Posgrados en ciencia animal en México: irrelevancia del concepto de excelencia académica.
J. V. Ku Vera
Perfiles educativos , 1993,
Abstract: Los posgrados en ciencia animal en México están sujetos a un proceso de evaluación permanente con el fin de obtener posgrados de excelencia académica. La producción animal en México no ha logrado cubrir los requerimientos de proteína de origen animal de la población y anualmente se realizan importaciones masivas de alimentos de origen animal. La eficiencia terminal en los posgrados es muy baja, debido a la ineficiente asesoría ofrecida a los alumnos y al nivel académico de los docentes. Las líneas de investigación en el posgrado no han contribuido a resolver los diversos problemas de la producción ganadera. Los criterios utilizados para determinar la excelencia académica no son los adecuados para estimular la generación de tecnología que ayude a incrementar el consumo de proteína de la población mexicana. La investigación en ganadería de traspatio podría ayudar a lograr este objetivo en el corto plazo.
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