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Search Results: 1 - 10 of 8800 matches for " Krebs;Regina "
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Gêmeos unidos: diagnóstico pré-natal, parto e desfecho após o nascimento
Brizot, Maria de Lourdes;Liao, Adolfo Wenjaw;Lilian Maria, Lopes;Marcos Marques, Silva;Vera, Krebs;Regina, Schultz;Marcelo, Zugaib;
Revista Brasileira de Ginecologia e Obstetrícia , 2011, DOI: 10.1590/S0100-72032011000500002
Abstract: purpose: the aim of this study was to analyze conjoined twins in terms of antenatal, delivery and postnatal aspects. methods: a retrospective descriptive analysis of prenatally diagnosed conjoined twins. prenatal ultrasound and echocardiography, delivery details, postnatal follow-up, surgical separation and post mortem data were reviewed. the twins were classified according to the type of fusion between fetal structures. the following data were analyzed: ultrasound and echocardiographic findings, antenatal lethality and possibility of surgical separation, delivery details and survival rates. results: forty cases of conjoined twins were included in the study. there were 72.5% cases of thoracophagus, 12.5% of paraphagus, 7.5% of omphalo-ischiophagus, 5.0% of omphalophagus, and 2.5% of cephalophagus. judicial termination of pregnancy was requested in 58.8% of the cases. cesarean section was performed in all cases in which pregnancy was not terminated. the mean gestational age at delivery was 35 weeks; all twins were live births with a mean birth weight of 3,860 g and 88% died postnatally. ten percent of the live borns were submitted to surgical separation with a 60% survival rate. the total survival rate was 7.5% and postnatal survival was 12%. antenatal evaluation of lethality and possibility of surgical separation were precise. there were no maternal complications related to delivery. conclusion: conjoined twins present a dismal prognosis mainly related to the complex cardiac fusion present in the majority of cases with thoracic sharing. at referring centers, prenatal ultrasound and echocardiographic evaluation accurately delineate fetal prognosis and the possibility of postnatal surgical separation.
When Food Kills
John Krebs
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.0020112
Abstract:
When Food Kills
John Krebs
PLOS Biology , 2004, DOI: 10.1371/journal.pbio.0020112
Abstract:
Contratos y convenios entre la Administración y particulares
Walter Krebs
Revista Derecho del Estado , 2006,
Abstract:
La vida social de los routers. Aplicando el conocimiento de las redes humanas al dise o de las redes de ordenadores
Krebs, Valdis
REDES : Revista Hispana para el Análisis de Redes Sociales , 2006,
Abstract: Network design must carefully consider how routers and circuits are interconnected to form an overall system with as few single points of failure as possible. Social network analysis can be applied to the design of computer networks. In this paper the centrality measures are used to analyse the efficiency and the resiliency of computer networks.
Bilinguisme, interculturalité et communication politique Bilingualism, Interculturalism and Political Communication
Viola Krebs
Droit et Cultures , 2009,
Abstract: Dans un monde de plus en plus interconnecté, où les personnes sont de plus en plus mobiles, la communication interpersonnelle et la maitrise de plusieurs langues prennent une importance grandissante1. C’est la raison pour laquelle, depuis quelques années, un nombre croissant d’études scientifiques ont été effectuées en avec le bi- et le multilinguisme2. Ces études montrent clairement que l’éducation bilingue est un bon moyen permettant de transmettre à l’enfant de multiples langues et qu’elle a un impact positif sur le développement cognitif de l’enfant3.Globalement, même si le multilinguisme est essentiel pour la communication moderne, il n’existe que relativement peu de programmes de bilinguisme scolaire au sein d’écoles publiques. Cela est particulièrement frappant dans des régions où différentes communautés linguistiques se c toient. Contrairement à ce que l’on pourrait imaginer, ces communautés ne se mélangent souvent pas de fa on harmonieuse. Dans de nombreux cas, des luttes de pouvoir se développent entre les communautés, créant ainsi des situations où il n’est guère facile de mettre en uvre des programmes de bilinguisme scolaire.Dans le présent article, nous considérerons les arguments avancés dans le contexte de deux référendums et votations populaires. Dans deux régions très différentes, la Californie (états-Unis) et Fribourg (Suisse), ces votes populaires ont mené à une interdiction de programmes de bilinguisme scolaire. Dans les deux cas, les arguments utilisés dans la presse écrite et dans le cadre de témoignages personnels ont clairement montré que le degré de résistance au bilinguisme est directement lié à la perception de l’autre langue. En effet, celle-ci a une incidence importante sur le succès ou non de programmes de bilinguisme scolaire. Nous avons également analysé le r le spécifique qu’a l’anglais dans les deux cas, le comparant à d’autres contextes socioculturels, particulièrement en Afrique (Mali, Sénégal, Tanzanie et Cameroun). Tous ces pays ont un passé colonial où l’anglais a soit le r le de la lingua franca soit de langue internationale.Sur la base de ces observations, nous proposerons des recommandations permettant d’accro tre les chances de succès de nouveaux programmes de bilinguisme scolaire. In an increasingly interconnected world, where people are more and more mobile, interpersonal communication and the mastering of multiple languages are of growing importance. This might be one reason why, in the past few years, an increasing number of scientific studies on bi- and multilingualism have been published. They show that b
News-Screen
Krebs M
Journal für Klinische Endokrinologie und Stoffwechsel , 2012,
Abstract:
On Matrix Product States for Periodic Boundary Conditions
Klaus Krebs
Physics , 1999, DOI: 10.1088/0305-4470/33/14/102
Abstract: The possibility of a matrix product representation for eigenstates with energy and momentum zero of a general m-state quantum spin Hamiltonian with nearest neighbour interaction and periodic boundary condition is considered. The quadratic algebra used for this representation is generated by 2m operators which fulfil m^2 quadratic relations and is endowed with a trace. It is shown that {\em not} every eigenstate with energy and momentum zero can be written as matrix product state. An explicit counter-example is given. This is in contrast to the case of open boundary conditions where every zero energy eigenstate can be written as a matrix product state using a Fock-like representation of the same quadratic algebra.
Toledo invariants of Higgs bundles on elliptic surfaces associated to base orbifolds of Seifert fibered homology 3-spheres
Mike Krebs
Mathematics , 2005,
Abstract: To each connected component in the space of semisimple representations from the orbifold fundamental group of the base orbifold of a Seifert fibered homology 3-sphere into the Lie group U(2,1), we associate a real number called the "orbifold Toledo invariant." For each such orbifold, there exists an elliptic surface over it, called a Dolgachev surface. Using the theory of Higgs bundles on these Dolgachev surfaces, we explicitly compute all values taken on by the orbifold Toledo invariant.
Auslander-Reiten theory in functorially finite resolving subcategories
Matthias Krebs
Mathematics , 2015,
Abstract: We analyze Auslander-Reiten quivers of functorially finite resolving subcategories. Chapter 1 gives a short introduction into the basic definitions and theorems of Auslander-Reiten theory in A-mod. We generalize these definitions and theorems in Chapter 2 and prove generalizations of the first and one and a half Brauer-Thrall conjecture for functorially finite resolving subcategories. Moreover, we show that sectional paths in Auslander-Reiten-quivers are invariants of decompositions of morphisms into sums of compositions of irreducible morphisms between indecomposable modules and are strongly connected to irreducible morphisms in subcategories. In Chapter 3 we introduce degrees of irreducible morphisms and use this notion to prove the generalization of the Happel-Preiser-Ringel theorem for functorially finite resolving subcategories. Finally, in Chapter 4, we analyze left stable components of Auslander-Reiten quivers and find out that their left subgraph types are given by Dynkin diagrams if and only if the corresponding subcategory is finite. In the preparation of the proof we discover connected components with certain properties and name them helical components due to their shape. It turns out later that these components are the same as coray tubes. In the final section we discuss under which conditions the length of modules tends to infinity if we knit to the left in a component and give a complete description of all connected components in which this is not the case.
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