OALib Journal期刊

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匹配条件: “Alves” ,找到相关结果约21589条。
Stress prevention by modulation of autonomic nervous system (heart rate variability): A preliminary study using transcranial direct current stimulation  [PDF]
Eduardo Manuel Gon?alves
Open Journal of Psychiatry (OJPsych) , 2012, DOI: 10.4236/ojpsych.2012.22016
Abstract: Introduction: Transcranial Direct Current Stimulation (tDCS) is a non-invasive, technique for brain stimulation. Anodal stimulation causes neuronal depolarisation and long-term potentiation, while cathodal stimulation causes hyperpolarisation and long-term depression. Stressors are associated with an increase in sympathetic cardiac control, a decrease in parasympathetic control, or both. Associated with these reactions is a frequently reported increase in Low Frequency (LF) Heart Rate Variability (HRV), a decrease in High Frequency (HF) power, and/or an increase in the LF/HF ratio. Objectives and aims: The present work aims to explore the tDCS potential in the modulation of the Autonomic Nervous System (ANS), through indirect stimulation of Anterior Cingulate Cortex (ACC). Methods: Two subjects, a 39 year old female and a 49 year old male, gave informed consent. Saline soaked synthetic sponges involving two, thick, metalic (stainless steel) rectangles, with an area of 25 cm2 each have been used as electrodes, connected to Iomed Phoresor II Auto device. It has been delivered a 2 mA current, for 20 minutes, over the left Dorsolateral Prefrontal Cortex (DLPFC) (Anode). Spectrum analysis (cStress software) of HRV has been performed before and after tDCS administration. Results: The female/male subject results of LF power, HF power and LF/HF ratio, before tDCS administration, were, respectively: 50.1 nu/60 nu, 46.1 nu/21.7 nu and 1.087/2.771; and, after tDCS administration, respectively: 33.5 nu/52.7 nu, 47.6 nu/ 22.8 nu and 0.704/2.312. Conclusions: tDCS over the left DLPFC (left ACC) increased parasympathetic activity and decreased sympathetic activity, suggesting the importance of tDCS in the management of stress-related disorders.
A investiga o sociológica em prol de um diagnóstico crítico da sociedade informacional
Alves Daniela Alves de
Sociologias , 2004,
Comparing SLIM, SPAR-H and Bayesian Network Methodologies  [PDF]
Eduardo Calixto, Gilson Brito Alves Lima, Paulo Renato Alves Firmino
Open Journal of Safety Science and Technology (OJSST) , 2013, DOI: 10.4236/ojsst.2013.32004

Human factors always affect maintenance performance, and in some cases, it’s critical to systems availability and reliability. Despite such importance, in so many cases, there’s no human reliability method applied to analyze maintenance tasks in order to understand better human factors influence in maintenance performance. There are several human analysis methodologies and regarding human factors, SLIM (Successes Likelihood Methods), SPAR-H (Standardized Plant Analysis Risk-Human Reliability Analysis Method) and Bayesian Net take into account such factors and may be a good approach to minimize human error. In order to propose a human reliability methodology to analyze maintenance tasks taking into account human factors, a case study about turbine star up tasks will be carried out. Therefore, different human reliability methods will be performed based on specialist opinion. Finally, the human error probability as well as drawbacks and advantages from different methods will be discussed to get a final conclusion.

Incisive Fossa Case Report
International Journal of Morphology , 2010, DOI: 10.4067/S0717-95022010000300041
Abstract: the importance of the radiographic anatomy knowledge in the interpretation of the pathologies is undeniable. the base of this knowledge is a great familiarity with the anatomy of the region that is going to be evaluated. thus, it is important to recognize what is considered normal, as well as the anatomical variations, so that one can identify what is pathologic. in this case report we describe a radiographic finding in leucoderm patient, 13 years old and one month, submitted to a panoramic radiography in a private clinic in s?o paulo - brazil, for evaluation of the third molars. during the radiographic reading, a bilateral radiolucid area with an inverted tear shape could be observed in the region between the roots of the lateral incisive teeth and upper canines. although it was an image that suggested bone rarefaction, the integrity of the hard lamina was evident in both sides. during the patient's clinical examination, a bilateral asymmetry was not observed, as well as any kind of sintomatology. in our case report, according to the clinical and radiographic findings, we conclude that the diagnosis was bilateral incisive fossa.
Study About the Development of the Temporomandibular Joint in the Human Fetuses
International Journal of Morphology , 2008, DOI: 10.4067/S0717-95022008000200010
Abstract: the temporomandibular joint (tmj) is a highly specialized articulation that differs from all the other synovial articulations for many reasons. in children, different from what we observe in adults, these articulations have rarely been studied under the morphofunctional aspect, mainly in the embryonary and fetal stages. in this study 10 fetuses with ages varying from 16 to 39 weeks of intrauterine life were used, and it could be observed that the fibers and thickness of the articular disc, as well as the articular capsule and the condylar process, suffer modifications according to age. it was also observed that the superior head of the lateral pterygoid muscle inserts itself in the articular disc and capsule in all the ages studied. also, the maturation of the articular tissues, especially of the articular disc, as well as, the associated muscles, suggests that the tmj was able to carry out mandibular movements since the 24th week of intrauterine life.
Study of Descendent Course of Buccal Nerve in Adults Individuals
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000200002
Abstract: the knowledge of the buccal nerve anatomy is of fundamental importance not only for the anesthesia but also for a safe intervention in the retromolar area. the aim of this work was to study its trajectory, in the area where it is related to the anterior margin of the ramus of the mandible, therefore providing important data for a safe intervention in the region. in this study we used 10 hemi-heads from male and female adults, from different ethnic groups. they were fixed in formol, and belong to the anatomy laboratory at the faculty of dentistry in araraquara unesp. these hemi-heads were dissected by lateral access, preserving the buccal nerve in its trajectory related to the anterior margin of the ramus of the mandible until its penetration in the buccinator muscle. next, we desinserted the masseter muscle so that all the ramus of the mandible were exposed. then, the following measurements were carried out: from the base of the mandible until the buccal nerve and from the base of the mandible until the apices of the mandibular coronoid process. these measurements were accomplished with a mitutoyo cd-6'' cs digital paquimeter. the following average values were obtained: 32.26 mm (to the left side) and 32.04 mm (to the right side), from the base of the mandible until the buccal nerve and 59.09 mm (to the left side) and 58.95 mm ( to the right side) from the base of the mandible until the apices of the coronoid process. we have concluded that normally, the buccal nerve crosses the anterior margin of the ramus of the mandible in an area which is above the superior half of the ramus of the mandible and also that the interventions in the retromolar region do not offer great risks of injury in the buccal nerve.
Origin of the Circumflex Branch of the Coronary Artery: A Case Report
International Journal of Morphology , 2008, DOI: 10.4067/S0717-95022008000100006
Abstract: the left coronary artery usually supplies the circumflex branch which provides several atrial and ventricular branches. during a routine dissection of the coronary artery, we could detect a circumflex branch originating from the right coronary artery. this resulted in an analysis of another 59 hearts without any similar results.
Morphometric and Morphological Study of the Dental Roots of the Upper First Premolars
International journal of odontostomatology , 2010, DOI: 10.4067/S0718-381X2010000200002
Abstract: the knowledge of the dental anatomy, mainly the radicular portion, is of great importance to some specialities such as the endodonty and periodonty. the aim of this study was to analyse the radicular morphometry of the upper first premolars, checking the average length of the roots, and also, their inclinations and the location of furcation area in bi and three radiculars. in this study were used 659 human upper first premolars belonging to department of morphology of the school of dentistry of araraquara, unesp, brazil. the teeth were previously selected, so only the ones with perfect roots were used. the teeth were divided in three groups: mono radiculars, bi radiculars and three radiculars. after they had been separated, some specific measurements with a brown & sharp digital paquimeter were done in each group. in our study we could conclude that: 1 - the upper first premolars mono radiculars presented an average radicular length higher than the bi radiculars and these ones, higher than the three radiculars; 2 - the upper first premolars bi radiculars presented an average radicular length higher for the vestibular root in relation to the palatine root, both roots presents higher inclination percentage for the distal. the furcation can be located in the middle third as well as in the apical third; 3 - the upper first premolars three radiculars present an average radicular length higher for the palatine root in relation to the vestibular roots. the radicular inclination is variable, and the distovestibular root presents higher inclination percentage for the mesial while the other roots for the distal. the furcation is located, in all the cases, at the middle third.
A compreens?o de políticas nas pesquisas com os cotidianos: para além dos processos de regula??o
Alves, Nilda;
Educa??o & Sociedade , 2010, DOI: 10.1590/S0101-73302010000400008
Abstract: this paper approaches the understanding of policies as collective practices, in day-to-day contexts, the multiple relationships of "practitioners" in the daily networks of knowledge and meanings, the concern with the political actions in rhizomes - the challenges to their understanding - and the indication of possible processes: the contexts of teacher training and the idea of "teachersstudents" in the present days.
O educador e sua rela??o com o passado
Alves, Claudia;
Educa??o em Revista , 2012, DOI: 10.1590/S0102-46982012000300010
Abstract: this paper discusses the contribution of history and education studies to the formation of educators. a paradoxical situation exists in this field of study, with a great increase in research in the one hand and on the other hand the restriction of this subject matter in the pedagogy courses in brazil. within this context, this paper proposes a debate based on the relation with the past established by educators, in their professional practice, considering this the central issue of historical studies. three aspects of this relationship are examined: 1st the survival of the past in the current times; 2nd several temporalities coexisting at the same time; 3rd multiple forms of time subjectiveness.

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