OALib Journal期刊

ISSN: 2333-9721



匹配条件: “GUTIERREZ” ,找到相关结果约1359条。
Carlos Grandjot. Drei Jahrzehnte der Mathematik in Chile: 1930-1960
Claudio Gutierrez,Flavio Gutierrez
Mathematics , 2014,
Abstract: Carlos Grandjot (1900-1979) was a German mathematician, doctorate from G\"ottingen, who moved to Chile in 1929 and developed there his life and career. He was influential in the development of Chilean mathematics during the period 1930 to 1960. This article reports our investigation of his biography and describes the mathematical environment in his new homeland.
Public Sector Responses to Jail Mental Health: A Review with Recommendations for Future Research  [PDF]
Ronald Helms, Ricky S. Gutierrez, Debra Reeves-Gutierrez
Sociology Mind (SM) , 2014, DOI: 10.4236/sm.2014.41004

The history of public mental health intervention in the US has been uneven and in some instances is characterized by a strong overtone of neglect. While clinical research in primarily private settings has generated findings that give a strong sense of “what works” in mental health diagnosis and treatment, this review pays special attention to the distribution of mental illness among jailed populations. Local jail systems house a substantial number of mentally challenged individuals but receive less attention than is warranted given their numbers. This paper concludes with a plea for research with a focus on the community determinants of mental health systems in order to enhance delivery of services and increase the likelihood of reaching those most in need of mental health treatment.

Blood flow, not hypoxia, determines intramucosal PCO2
Guillermo Gutierrez
Critical Care , 2004, DOI: 10.1186/cc3489
Abstract: Hypotension is strongly associated with poor patient outcome, and reversing this condition clearly should be a primary therapeutic goal when treating patients in the early stages of shock. Potent inotropic and vasoconstrictor agents are de rigueur in the treatment of shock. The therapeutic goal is to maintain the mean arterial pressure at levels above 60 mmHg, a value thought to be the minimal pressure head required for coronary and renal perfusion [1]. Our predicament is how best to determine the mean arterial pressure level that will result in optimal tissue perfusion in a given patient. In other words, is a mean arterial pressure of 60 mmHg sufficient to assure adequate perfusion to all organs? In some patients this accepted minimal mean arterial pressure may not suffice to insure adequate tissue perfusion. Should we aim for higher, or perhaps even lower, mean arterial pressure values? Catecholamines, while extremely useful in treating decreases in cardiac output, may produce an unwelcome increase in myocardial O2 consumption in cardiogenic shock, or may impede blood flow to oxygen-starved tissues in hypovolemic shock [2]. In septic shock, the balance between the positive and the negative effects of vasopressor and inotropic agents are even more difficult to discern [3].A reliable and practical method to detect the onset of tissue hypoxia in critically ill patients would be an invaluable tool in guiding the timing and aggressiveness of resuscitation efforts. Finding such a tool has bedeviled clinical investigators for many years. Given our present level of technology, our options in determining the adequacy of tissue oxygenation in the clinical setting remain limited. Direct measures of tissue oxygen concentration are not sufficient to characterize the complex interaction between cellular energy requirements and oxygen supply. More complex technology, such as magnetic resonance spectroscopy and near-infrared spectroscopy are either insensitive or impractical in t
Baum's Textbook of Pulmonary Diseases, 7th Edition
Guillermo Gutierrez
Critical Care , 2005, DOI: 10.1186/cc3717
Abstract: On the basis of that experience, I have consistently advised our entering pulmonary fellows to read Baum's textbook from cover to cover as an efficient and relatively painless introduction to the pathophysiology and treatment of pulmonary diseases. With each subsequent edition, however, Baum's textbook grew progressively bulkier until it had to be split into two volumes. This change, in my opinion, resulted in the loss of a most endearing attribute, that of being a single-volume compendium of pulmonary medicine easily carried to the office or to an on-call room and read as time permitted.The seventh edition of Baum's textbook is a welcome return to the single-volume format. The editors have completely revamped the previous edition of the book and produced a comprehensive, easy-to-read collection of chapters on pulmonary disorders, while keeping a tight rein on the burgeoning tendencies inherent in any multi-authored book. With the present edition of Baum's textbook, the editors have achieved their aim in producing a focused, highly readable work that serves both as a textbook and desk reference for practitioners of pulmonary medicine at all levels of training.The book's 70 chapters are written by 106 authors, many of them internationally recognized experts in their field. The chapters are grouped into 12 sections ranging from diagnostic methods to respiratory disorders of sleep. There is overall coherence in size and feel of the various chapters, which, with very few exceptions, are clearly written and abundantly referenced. The conciseness of these chapters promotes learning and stimulates the reader to learn about related issues. I found myself jumping from chapter to chapter as my curiosity was piqued. Each chapter includes a critical evaluation of the underlying literature as well as simplified evidence-based medicine tables stating the level of evidence underlying critical recommendations or conclusions, with the prospective, randomized trial considered the hig
En busca del diálogo y la transformación: consecuencias de los supuestos detrás de la investigación social
Roberto Gutierrez
Revista de Estudios Sociales , 2004,
Abstract: In this work I compare some characteristics and results obtained from two different methodologies used to study work in the informal sector. On the one hand, I used confirmatory factor analysis to study the relationships between social structure, life conditions, and psychological functioning. On the other hand, workers participated in the critical retrieval of their work histories, and in the discussion and analyses of their testimonies to research how we understand, communicate, and react to our work conditions. My aim is to explore how do these two methodologies complement each other. The quantitative and qualitative approaches respond to different questions, use different analytic categories, explore distinct patterns of relationships, imply very different relations between those who participate in the research, and serve different purposes for distinct people. The differences between research methodologies stem from distinct assumptions about the social world and the ways people perceive their world. Therefore, the task of combining both approaches becomes impossible, and one must accept that they only provide accounts of the same phenomenon from two different standpoints. The scientist is responsible for choosing a research methodology that determines how the phenomenon of his interest will be revealed and what will be the consequences of the knowledge thus obtained. Methods condition knowledge. The choice of methodology is related to personal assumptions about human beings and the world in which they live. Awareness of these relationships is basic for the work of a researcher who aims to help in the making of a different society.
M. Gutierrez
Motricidad : European Journal of Human Movement , 2010,
Abstract: Con el presente trabajo se pretende dar una visión general sobre el ciclismo deportivo desde una perspectiva biomecánica, aunque es necesario decir que la extraordinaria dimensión de la vasta producción científica relacionada con el tema, hace que sea realmente difícil abordar, en un solo trabajo, los diferentes aspectos que abarca la biomecánica del ciclismo. Debido a la diversidad de contenidos que incluye la biomecánica del ciclismo, en este trabajo los contenidos se han restringido en tres unidades: la primera, orientada hacia el estudio de las fuerzas que se oponen al desplazamiento y especialmente al análisis de las resistencias aerodinámicas, la segunda, al estudio de las fuerzas propulsivas y especialmente las aplicadas contra el pedal y, por último, orientaremos nuestra atención hacia los aspectos más relevantes que determinan la eficacia mecánica del desplazamiento en ciclismo.
Nestor Gutierrez
ARS (S?o Paulo) , 2008, DOI: 10.1590/s1678-53202008000100015
Bloch y la responsabilidad ambiental
Daniel Gutierrez
Revista Theomai , 2004,
Abstract: Bloch and the environmental responsability Daniel Gutiérrez In this paper I am interested in researching the environmental consequences of some ideas of the German Marxist thinker Ernst Bloch focusing on the concept of "co-producing with nature". Bloch analyzes the relations of production in the capitalist society and explains how far from nature we are. Conversely Hans Jonas criticizes that position because of its engagement with an Utopist point of view: Modern Utopianism is responsible for trying to "rebuild" the human society, nature and our relationships with it. The result is the current terrible environmental destruction. In my work I asses the importance of the necessity of changing the way of production (Bloch) and the ethical responsibility (Jonas) in the face of the well known environmental problems.
Polisemy of the “mental model” concept. Consequences for the didactical research
Rufina Gutierrez
Investiga??es em Ensino de Ciências , 2005,
Abstract: In this paper a summary of the use of the construct “mental model” in Science Education literature produced in the last ten years is presented. The diversity of understanding found on the different articles allows us to state that the concept of mental model, clearly defined and identified in Cognitive Science, is a polysemic term, in such a way that its genuine meaning is impossible to guess from reading only this literature. As a consequence, the construction of scientific knowledge in this field is quite difficult, because in this situation the conditions for it (communication of findings, comparing, discussing, evaluating, achieving consensus) are not possible, due to the lack of convergence in the meaning of the data. Other important issue can be foreseeing for Science Education itself: all the didactic consequences of applying research’s finding on mental models, as are those related to understand the students’ spontaneous thinking, its mental organisation, the uncovering of mechanisms capable to drive a conceptual change, etc., can be missed, and the teachers obstructed to apply them in their teaching activities.
On $C^r-$closing for flows on 2-manifolds
Carlos Gutierrez
Mathematics , 1999, DOI: 10.1088/0951-7715/13/6/301
Abstract: For some full measure subset B of the set of iet's (i.e. interval exchange transformations) the following is satisfied: Let X be a $C^r$, $1\le r\le \infty$, vector field, with finitely many singularities, on a compact orientable surface M. Given a nontrivial recurrent point $p\in M$ of X, the holonomy map around p is semi-conjugate to an iet $E :[0,1) \to [0,1).$ If $E\in B$ then there exists a $C^r$ vector field Y, arbitrarily close to X, in the $C^r-$topology, such that Y has a closed trajectory passing through p.

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