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Search Results: 1 - 10 of 3797 matches for " Adalys Alvarez "
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A mixed integer nonlinear programming formulation for the problem of fitting positive exponential sums to empiricaldata
Adalys Alvarez,Hugo Lara
Opuscula Mathematica , 2011,
Abstract: In this work we deal with exponential sum models coming from data acquisition in the empirical sciences. We present a two step approach based on Tikhonov regularization and combinatorial optimization, to obtain stable parameter estimations, which fit the data. We develop properties of the solutions, based on their optimality conditions. Some numerical experiments are shown to illustrate our approach.
Um outro mundo (também feminista...) é possível: construindo espa os transnacionais e alternativas globais a partir dos movimentos
Alvarez
Revista Estudos Feministas , 2003,
Abstract:
Redefinition of the Terminus of the Middle America Trench  [PDF]
Román Alvarez
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.44070
Abstract:

The terminus of the Middle America Trench has been traditionally represented as an arc, concave towards the continent. Tres Marías Islands are located at the terminus of the Middle America Trench in western Mexico, and their location is not only intriguing but also a key to the re-construction of the position of Baja California peninsula before separation from the North America plate. Previous re-constructions suggested various places around the location of Tres Marías Islands for the position of the tip of the peninsula, and several converge to a position that invades the area occupied by the islands, offering no explanation for the overlap. Before peninsular separation from North America, the Guadalupe trench followed a smooth curve; recreating the position of this paleo-trench yields a baseline for fixing the position of the peninsula, as well as the original position of the Tres Marías Islands fragment. A new tectonic view of the structure of the Middle America Trench terminus is proposed, replacing the traditional arc representation with a series of en echelon blocks, the northernmost terminates at the Tres Marías Escarpment. The long sides of the blocks correspond to previously identified geological faults in the Bahía de Banderas region, while their offshore continuation is supported by topographic observations. As a test of this model I show the corresponding re-construction of the position of Baja California prior to separation from the North America plate and the positional evolution of the peninsula and the Tres Marías fragment from Chron 4n.2 (7.90 Ma) to Chron 3n.4 (5.12 Ma).

Psychic Neuronal Hypersynchronies: A New Psychiatric Paradigm?  [PDF]
Javier Alvarez-Rodriguez
Health (Health) , 2014, DOI: 10.4236/health.2014.616242
Abstract: This paper deals with certain psychic automatisms that appear suddenly in the consciousness of the subject in a passive or automatic way and that usually are diagnosed as psychiatric symptoms or manifestations of an epileptic partial seizure. These mental automatisms are described in many writings by mystics, philosophers, literates, composers, and many different great artists and creators from human history, but they did not confer any pathological value on these experiences. The analysis of the epileptogenic activity gives us arguments to propose that these automatic experiences are due to neuronal circuits physiologically adapted to fire in a hypersynchronous way. With these data we enunciate an innovative hypothesis: these psychic experiences are manifestations of an adaptive neuronal network for which we propose the term psychic hypersynchrony. Finally, we discuss the consequences of this hypothesis, especially in the epileptic, psychiatric, and neuropsychopharmacologic fields.
Hypersynchronic Mental Automatisms: An Innovative Psychiatric Hypothesis Reaffirming Its Validity for Fifteen Years  [PDF]
Javier Alvarez-Rodriguez
Health (Health) , 2015, DOI: 10.4236/health.2015.71006
Abstract: This paper deals with certain psychic automatisms that are usually diagnosed as psychiatric symptoms or as simple partial seizures. These mental automatisms are described in many writings by mystics, philosophers, literates, composers, and many different great artists and creators from human history, but they have never conferred any pathological value on these experiences. We have carried out previous scientific researches in which we found abundant arguments suggesting that these automatisms are due to neuronal nets physiologically adapted to fire in a hypersynchronous way. With these pieces of information we propose an audacious hypothesis: these automatic experiences are manifestations of a cognitive cerebral function that, until now, has been insufficiently delimited. We propose the term hyperia to denominate this cognitive function, which we consider responsible for clairvoyant and/or telepathic cognitions. Finally, we discuss the relevant consequences of this hypothesis, particularly in the fields of epilepsy, psychiatry, and neuropsychopharmacology.
Psychiatric Symptoms of Epileptic Nature: An Old Hypothesis in Light of Current Psychopharmacologic Advances  [PDF]
Javier Alvarez-Rodriguez
Open Journal of Psychiatry (OJPsych) , 2015, DOI: 10.4236/ojpsych.2015.51012
Abstract: This paper analyses a hypothesis according to which many positive psychiatric symptoms should be interpreted as symptoms of epileptic nature. When we first raised this proposition, almost fifteen years ago, it was inconsistent with the widespread conviction among psychiatrists that psychopharmacological drugs used to suppress psychiatric symptoms were proconvulsant. But lately, there have appeared numerous neuroscientific investigations that defend the anticonvulsant effect of most psychopharmacological drugs, hence supporting our hypothesis. We have carried out bibliographical reviews in search of the pro- or anticonvulsant role of these substances, particularly lithium, selective serotonin reuptake inhibitors, dual antidepressants, and antipsychotic drugs.These researches show abundant evidence regarding the anticonvulsant action of these substances, a fact that contributes to a better comprehension of paradoxical relationship between epilepsy and psychoses.
RETRACTED: Biophysics and Cancer: The Electromagnetic Fields Produced by the Mitochondria and Its Effect on the Cell’s Metabolic Regulation  [PDF]
Nina Bardi de Alvarez
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2014, DOI: 10.4236/jemaa.2014.610033
Abstract:

Short Retraction Notice

The paper does not meet the standards of \" Journal of Electromagnetic Analysis and Applications \".

This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

Please see the article page for more details. The full retraction notice in PDF is preceding the original paper which is marked \"RETRACTED\".

Modelos de análisis para un recurso en línea: necesidad y tipologías de las parrillas de evaluación
Alfredo Alvarez Alvarez
?édille : Revista de Estudios Franceses , 2008,
Abstract: The sheer number and variety of inter-net resources on hand today, constantly increasing, make it vital to be able to assess their pedagogical worth. Online resources often lack any sort of quality standards, so these need to be urgently provided. Prop-erly constructed assessment grids have a crucial role to play here, since they could provide pedagogical insights that favour an effective distinction between useful and non-useful resources.
On y va! Un proyecto en constante creación
Alfredo Alvarez Alvarez
?édille : Revista de Estudios Franceses , 2006,
Abstract: The following lines depict the process of creating a website for learning French and the whys and wherefores of doing so. The ONYVA website is a long-term project that aims to input new and thought-provoking ideas on the use of the new technologies. The twofold goal is to offer greater access to teachers and students while also furnishing select, reliable and tried-and-tested information for anyone who wishes to drop in to the site.
Online Cooperative Learning and Key Interpsychological Mechanisms: An Exploratory Study through the Analysis of the Discourse Content  [PDF]
Marly Casanova, Ibis M. Alvarez
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.38197
Abstract: This research analyses the cooperative learning process in three groups applying the case study technique in a virtual university asynchronous communication context. The exploratory study was performed within a subject taught at a Master in e-learning programme. Based on a review of the theory and the current status of research, we delineate the concept of virtual cooperative learning and the main interpsychological mechanisms accounting for its effectiveness. Through a case study methodology and by means of discourse analysis, we identify the main interpsychological mechanisms involved in peer cooperation—positive interdependence, construction of meaning and psychosocial relations. We categorise the types of language involved in the process of joint construction of meaning all throughout the sequence of cooperative learning being studied.
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