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Application of a Computational Tool to Study the Influence of Worn Wheels on Railway Vehicle Dynamics  [PDF]
Jo?o Pombo
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.52009
Abstract: The search for fast, reliable and cost effective means of transport that presents better energy efficiency and less impact on the environment has resulted in renewed interest and rapid development in railway technology. To improve its efficiency and competitiveness, modern trains are required to travel faster, with high levels of safety and comfort and with reduced Life Cycle Costs (LCC). These increasing demands for vehicle requirements imposed by railway operators and infrastructure companies include maintaining the top operational speeds of trainsets during their life cycle, having low LCC and being track friendly. This is a key issue in vehicle design and in train operation since it has a significant impact on the safety and comfort of railway systems and on the maintenance costs of vehicles and infrastructures. The purpose of this work is to analyze how the wear progression on the wheelsets affects the dynamic behavior of railways vehicles and its interaction with the track. For this purpose a vehicle, assembled with new and worn wheels, is studied in realistic operation scenarios. The influence of the wheel profile wear on the vehicle dynamic response is assessed here based on several indicators used by the railway industry. The running stability of the railway vehicles is also emphasized in this study.
Nuevos modos de exposición y circulación de las imágenes fotográficas
Pombo,Mercedes;
Cuadernos del Centro de Estudios en Dise?±o y Comunicaci?3n. Ensayos , 2012,
Abstract: from the last decades of xxth century the circulation of photographies and art works has been modified substantially, generating a new way to approach this thematic as much from the theory as from the practice. this article presents those thematics linked to the photography nature; such as the audience-work relationship, the bonds between public and private and the glance of the audience like "an another" different from the creator.
Siglo XX
Pombo,Mercedes;
Cuadernos del Centro de Estudios en Dise?±o y Comunicaci?3n. Ensayos , 2011,
Abstract: the 20th century is characterized by a wide profusion of movements and ideas; it turns out difficult to determine paradigms and examples to conceptually unify interior spaces of that period. on the other hand, the link of this century with sacred art suffers important changes. it is ordained by three key moments based on the history of mentalities and reigning aesthetics. during the first years the modernist spirit prevails; in a second term rationalistic character appears as a base of all operations and ways of thinking; and finally, postmodern design is an indicator of a new preponderant ideology for the last decades of 20th century and dawn of 21st. among these three moments, modern rationalistic movement is outlined by the emblematic le corbusier whose thought officiates as a hinge of design productions for the last times.
Práticas interdisciplinares
Pombo, Olga;
Sociologias , 2006, DOI: 10.1590/S1517-45222006000100008
Abstract: this text is aimed at describing and characterizing interdisciplinary practices that are currently under use in scientific inquiry. therefore, a categorization of new interdisciplinary arrangements is presented (border sciences, interdisciplines, and intersciences) as well as a typology of the several practices of interdisciplinary inquiry mobilized by today's science (import practices, crisscrossing, convergence, descentering, and compromising). as an example, the disciplinary statute of cognitive sciences is studied in some detail.
Estudo das características psicométricas do Michigan Alcoholism Screening Test (MAST) numa popula??o clínica de dependentes do álcool
Pombo,Samuel;
Toxicodependências , 2010,
Abstract: the alcoholism in its biopsychosocial complexity, is considered a multidimensional and polymorph problem in terms of pathological expression. the application of instruments as mast, permits the early diagnosis of excessive and dependent drinkers and allows the characterization of alcohol related problems when used under the structure of empirical classification. the study aim to evaluate the psychometric characteristics of mast (items and factorization study) in a clinical population of 202 alcohol dependents, observed in the alcoholism unit of the psychiatric service of santa maria′s general hospital. the results validate the utility of a unitary score system, as an equitable method as the regular and identify the following factorial solution: (1) familiar and work problems; (2) alcohol problems; (3) problem recognition of alcohol intake; (4) help-seeking; (5) hospitalization;(6) legal problems and (7) alcohol withdrawal syndrome. the factorial mast, provides us with an assessment of deterioration areas of the individual, that when quantified and systematized, configure an instrument for early detection of pathological use of alcohol and an anamnestic empirical classification of the alcohol related problems heterogeneity.
Differentiation with stratification: a principle of theoretical physics in the tradition of the memory art
Claudia Pombo
Physics , 2015, DOI: 10.1007/s10701-015-9936-z
Abstract: The Art of Memory started with Aristotle's questions on memory. During its long evolution, it had important contributions from alchemist, was transformed by Ramon Llull and apparently ended with Giordano Bruno, who was considered the best known representative of this art. This tradition did not disappear, but lives in the formulations of our modern scientific theories. From its initial form as a method of keeping information via associations, it became a principle of classification and structuring of knowledge. This principle, which we here name {\it differentiation with stratification}, is a structural design behind classical mechanics. Integrating two different traditions of science in one structure, this physical theory became the modern paradigm of science. In this paper, we show that this principle can also be formulated as a set of questions. This is done via an analysis of theories, based on the epistemology of observational realism. A combination of Rudolph Carnap's concept of theory as a system of observational and theoretical languages, with a criterion for separating observational languages, based on analytical psychology, shapes this epistemology. The `nuclear' role of the observational laws and the differentiations from these nucleus, reproducing the general cases of phenomena, reveals the memory art's heritage in the theories. Here in this paper we argue that this design is also present in special relativity and in quantum mechanics.
Gastroduodenal Artery Reconstruction as Salvage Procedure for Pancreas Head Ischemia during Transplantation: A Case Report  [PDF]
Raquel Garcia-Roca, Emiliano Astudillo Pombo
Open Journal of Organ Transplant Surgery (OJOTS) , 2012, DOI: 10.4236/ojots.2012.24007
Abstract: Vascularization of the pancreatic allograft depends on the mesenteric and celiac arteries. During procurement inadvertent sectioning of the branches to the head of the pancreas can lead to ischemia and generally there is a need to remove the graft during the same transplant procedure. Knowledge of several unconventional revascularization techniques in the back table and other salvage procedures after reperfusion can be useful in deciding the fate of the graft once ischemia is established immediately after engraftment. We present a case of revascularization of the gastroduodenal artery after reperfusion of the pancreas to improve blood flow to the head of the pancreas that was ischemia after restoring circulation.
Polycomb Targets Seek Closest Neighbours
Mita Chotalia,Ana Pombo
PLOS Genetics , 2011, DOI: 10.1371/journal.pgen.1002031
Abstract:
Genomics meets nanoscience: probing genes and the cell nucleus at 10-9 meters
Joan Politz, Ana Pombo
Genome Biology , 2002, DOI: 10.1186/gb-2002-3-3-reports4007
Abstract: This meeting brought together scientists from areas of research ranging from genome-sequence analysis, gene expression and organization in the cell nucleus to nanolithography and high-resolution imaging methods. It was recognized that advances from ongoing genome-sequencing projects and three-dimensional analysis of cell nuclei may extend our understanding of gene expression beyond just a few well-studied examples to give a much more comprehensive view of how the genome is organized within the cell nucleus. Research in these areas was predicted to lead to breakthroughs in the study of genome plasticity (for example in stem cells), cancer (and other conditions in which proper gene expression becomes impaired), and gene therapy.Carol Bult (Jackson Laboratories, Bar Harbor, USA) began the meeting by giving an overview of the status of genomic sequencing, management of databases, and structural analysis. The vast amount of sequence data to be analyzed requires versatile tools that can be used to recognize similarities between single sequences as well as to identify interactions among linkage groups, both long-range and in three dimensions. She described current efforts using proteomics to help understand gene regulatory networks and the different sets of expressed proteins in various cellular and tissue structures and reminded us that only about 1-3% of the human genome is thought to code for proteins. Charles Lawrence (Wadsworth Center, Albany, USA) explained the use of computational algorithms to identify promoters in large sequence databases using cross-species comparisons and reported that these methods can correctly identify promoter sequences in Escherichia coli. Ross Hardison (Pennsylvania State University, University Park, USA) explained the use of sequence-alignment programs to identify important non-coding genomic regions. As much as 38% of the mouse and human genome is conserved non-coding sequence and is found in relatively evolutionarily stable clusters wit
Das situa??es do jogo ao ensino das fixa??es no handebol
Menezes, Rafael Pombo;
Motriz: Revista de Educa??o Física , 2011, DOI: 10.5016/1980-6574.2011v17n1p39
Abstract: the aims of this work are to show the importance of the fixations in handball as a technical-tactical offensive element and pointing to possible advantages and disadvantages for the attackers in the game. the teaching of this technical-tactical element is discussed in the young categories in handball, for which it is suggested that players, from the unpredictability of conditions imposed, are embedded in a context of teaching-learning-training which provide experience of all kinds of situation. changes from previous experiences allow the formation of players who can act intelligently and to adapt their behavior to the pressures imposed by the opponents and the possibilities offered by fellow.
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