203 research outputs found
Thermocapillary control of microfluidic transport with a stationary cyclic heat source
No full textIn this paper, a new method of cyclic flow control with an external heat source is developed for thermocapillary pumping of a micro-droplet in a closed microchannel. Unlike past studies with a moving heat source at the receding edge of the droplet, this new technique involves a stationary cyclic heat source embedded within an adjoining silicon substrate. Thermocapillary pumping of the micro-droplet is examined numerically (finite-volume method) and theoretically (slug-flow approximation). In contrast to past studies, this paper considers the solution of the full Navier–Stokes and energy equations within the droplet. Additionally, temperature boundary conditions for a stationary heat source are applied at the interface between the substrate and its surroundings, rather than along the microchannel wall. The finite-volume formulation is developed with a sliding grid in the liquid phase and an adaptive grid along the compressed air and substrate regions. Coupled pressure and velocity boundary conditions are applied along the droplet/air interface. Numerical predictions suggest that cyclic droplet displacement can be obtained with the stationary heat source. Close agreement between numerical and theoretical predictions has provided useful validation of the formulations.NSERC (Canada)University of Manitoba Graduate Fellowship (PSG
La obra de G. W. F. Hegel en español: compilación y fuentes
No full textThe objective of this article is to compile the translations of G. W. F. Hegel\u27s works in Spanish. In a first stage, the German sources of these translations are reconstructed by considering the Hegelian legacy and the editions of the disciples, of G. Lasson and J. Hoffmeister, of H. Glockner, of E. Moldenhauer and K. M. Michel, and the Hegel-Archiv. In each case the composition is detailed and the representation of the Hegelian philosophy it sustains and propagates is discussed. In a second stage, the translations are recompiled, specifying their sources, bibliographical data and reprints. The third step is a quantitative analysis of the translations as a whole.El artículo tiene por objetivo compilar las traducciones de las obras de G. W. F. Hegel en español. En un primer momento, se reconstruyen las fuentes alemanas de esas traslaciones considerando el legado hegeliano y las ediciones de los discípulos, de G. Lasson y J. Hoffmeister, de H. Glockner, de E. Moldenhauer y K. M. Michel, y del Hegel-Archiv. En cada caso se detalla la composición y se comenta la representación de la filosofía hegeliana que sustenta y propulsa. En un segundo momento, se recompilan las traducciones especificando sus fuentes, sus datos bibliográficos y sus reediciones. En un tercer momento, se analiza cuantitativamente el conjunto de las traducciones
La obra de G. W. F. Hegel en español: compilación y fuentes
No full textEl artículo tiene por objetivo compilar las traducciones de las obras de G. W. F. Hegel en español. En un primer momento, se reconstruyen las fuentes alemanas de esas traslaciones considerando el legado hegeliano y las ediciones de los discípulos, de G. Lasson y J. Hoffmeister, de H. Glockner, de E. Moldenhauer y K. M. Michel, y del Hegel-Archiv. En cada caso se detalla la composición y se comenta la representación de la filosofía hegeliana que sustenta y propulsa. En un segundo momento, se recompilan las traducciones especificando sus fuentes, sus datos bibliográficos y sus reediciones. En un tercer momento, se analiza cuantitativamente el conjunto de las traducciones.The objective of this bibliographic commentary is to compile the translations of G. W. F. Hegel’s works in Spanish. In a first stage, the German sources of these translations are reconstructed by considering the Hegelian legacy and the editions of the disciples, of G. Lasson and J. Hoffmeister, of H. Glockner, of E. Moldenhauer and K. M. Michel, and the Hegel-Archiv. In each case the composition is detailed and the representation of the Hegelian philosophy it sustains and propagates is discussed. In a second stage, the translations are recompiled, specifying their sources, bibliographical data and reprints. The third step is a quantitative analysis of the translations as a whole.Fil: Figueredo Núñez, Hugo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de General Sarmiento. Instituto de Ciencias. Filosofía de la Historia E Historia D/la Filosofía; Argentin
La obra de G. W. F. Hegel en español: compilación y fuentes
No full textEl artículo tiene por objetivo compilar las traducciones de las obras de G. W. F. Hegel en español. En un primer momento, se reconstruyen las fuentes alemanas de esas traslaciones considerando el legado hegeliano y las ediciones de los discípulos, de G. Lasson y J. Hoffmeister, de H. Glockner, de E. Moldenhauer y K. M. Michel, y del Hegel-Archiv. En cada caso se detalla la composición y se comenta la representación de la filosofía hegeliana que sustenta y propulsa. En un segundo momento, se recompilan las traducciones especificando sus fuentes, sus datos bibliográficos y sus reediciones. En un tercer momento, se analiza cuantitativamente el conjunto de las traducciones.The objective of this bibliographic commentary is to compile the translations of G. W. F. Hegel’s works in Spanish. In a first stage, the German sources of these translations are reconstructed by considering the Hegelian legacy and the editions of the disciples, of G. Lasson and J. Hoffmeister, of H. Glockner, of E. Moldenhauer and K. M. Michel, and the Hegel-Archiv. In each case the composition is detailed and the representation of the Hegelian philosophy it sustains and propagates is discussed. In a second stage, the translations are recompiled, specifying their sources, bibliographical data and reprints. The third step is a quantitative analysis of the translations as a whole.Fil: Figueredo Núñez, Hugo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de General Sarmiento. Instituto de Ciencias. Filosofía de la Historia E Historia D/la Filosofía; Argentin
Surface micro-grooves for near-wall exergy and flow control: Application to aircraft intake de-icing
No full textThis paper develops a new surface micro-profiling technique for reducing exergy losses and controlling near-wall flow processes, particularly for anti-icing of a helicopter surface. Fabrication of embedded surface microchannels entails surface etching with KOH and XeF2 gas, so that the interspersed microchannels can be assembled into a surface layer of silicon. Testing of the micro-profiled surfaces is performed with particle image velocimetry in a water tunnel. Experimental data indicate that converging open microchannels lead to certain differences of flow patterns on the downstream side of an engine cooling bay. Furthermore, exergy losses for external flow past the parallel embedded microchannels are shown to be lower than previous benchmark results without microchannels. Analytical results are presented for these losses of available energy and exergy destruction. Reduced drag of slip-flow conditions within each microchannel offsets the added friction irreversibility of larger surface area. By altering the near-wall flow patterns, it is anticipated that embedded surface microchannels can provide a useful new approach for dealing with flow-related problems of aircraft icing
Glockner, Clara (Death, 1876-02-05)
No full textAddress: 54 Hamer St.Age at death: 7 yrsPg 97/1876/113/F W S/City/Dr. Kellar/J. Schreiber/St. John'sOriginal record filed in drawer labeled 'GL-GOLDBERG'
The EUNOMIA project on coercion in psychiatry: study design and preliminary data
No full textPrevious national research has shown significant variation in several aspects of coercive treatment measures in psychiatry. The EUNOMIA project, an international study funded by the European Commission, aims to assess the clinical practice of these measures and their outcomes. Its naturalistic and epidemiological design is being implemented at 13 centres in 12 European countries. This article describes the design of the study and provides preliminary data on the catchment areas, staff, available facilities and modalities of care at the participating centres
Manifolds of mappings on cartesian products
No full textGiven smooth manifolds (which may have a boundary or
corners), a smooth manifold modeled on locally convex spaces and
, we consider the set
of all mappings which are in the sense of Alzaareer.
Such mappings admit, simultaneously, continuous iterated directional
derivatives of orders in the th variable for
, in local charts. We show that
admits a canonical smooth manifold
structure whenever each is compact and admits a local addition. The
case of non-compact domains is also considered.Comment: 48 pages, LaTeX. v2: update of references, minor corrections (all
results unchanged
Preconception care for diabetic women for improving maternal and fetal outcomes : a systematic review and meta-analysis
No full textBackground
Preexisting diabetes mellitus is associated with increased risk for maternal and fetal adverse outcomes. Despite improvement in the access and quality of antenatal care recent population based studies demonstrating increased congenital abnormalities and perinatal mortality in diabetic mothers as compared to the background population. This systematic review was carried out to evaluate the effectiveness and safety of preconception care in improving maternal and fetal outcomes for women with preexisting diabetes mellitus.
Methods
We searched the following databases, MEDLINE, EMBASE, WEB OF SCIENCE, Cochrane Library, including the CENTRAL register of controlled trials and CINAHL up to December 2009, without language restriction, for any preconception care aiming at health promotion, glycemic control and screening and treatment of diabetes complications in women of reproductive age group with type I or type II diabetes. Study design were trials (randomized and non-randomized), cohort and case-control studies. Of the 1612 title scanned 44 full papers were retrieved of those 24 were included in this review. Twelve cohort studies at low and medium risk of bias, with 2502 women, were included in the meta-analysis.
Results
Meta-analysis suggested that preconception care is effective in reducing congenital malformation, RR 0.25 (95% CI 0.15-0.42), NNT17 (95% CI 14-24), preterm delivery, RR 0.70 (95% CI 0.55-0.90), NNT = 8 (95% CI 5-23) and perinatal mortality RR 0.35 (95% CI 0.15-0.82), NNT = 32 (95% CI 19-109). Preconception care lowers HbA1c in the first trimester of pregnancy by an average of 2.43% (95% CI 2.27-2.58). Women who received preconception care booked earlier for antenatal care by an average of 1.32 weeks (95% CI 1.23-1.40).
Conclusion
Preconception care is effective in reducing diabetes related congenital malformations, preterm delivery and maternal hyperglycemia in the first trimester of pregnancy
Bibliographie sélective
No full textI. Œuvres de Hegel en langue allemande 1. Œuvres complètes Sämtliche Werke [cité SW], Jubiläumsausgabe in zwanzig Bänden. Auf Grund des Originaldrucks neu hrsg. von H. Glockner, rééd. Stuttgart-Bad Cannstatt, Frommann-Holzboog, 1964-1971. Gesammelte Werke [cité GW], im Auftrag der deutschen Forschungsgemeinschaft hrsg. von der Rheinisch-Westfälischen Akademie der Wissenschaften, Hamburg, Meiner, 1968-, 19 volumes parus. Werke in zwanzig Bänden [cité W], E. Moldenhauer & K. M. Michel (éd.), Fr..
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