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Search Results: 1 - 10 of 297851 matches for " Suzie J Kovacs "
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Population distribution and burden of acute gastrointestinal illness in British Columbia, Canada
M Kate Thomas, Shannon E Majowicz, Laura MacDougall, Paul N Sockett, Suzie J Kovacs, Murray Fyfe, Victoria L Edge, Kathryn Doré, James A Flint, Spencer Henson, Andria Q Jones
BMC Public Health , 2006, DOI: 10.1186/1471-2458-6-307
Abstract: The magnitude and distribution of acute GI in British Columbia (BC), Canada was evaluated via a cross-sectional telephone survey of 4,612 randomly selected residents, conducted from June 2002 to June 2003. Respondents were asked if they had experienced vomiting or diarrhoea in the 28 days prior to the interview.A response rate of 44.3% was achieved. A monthly prevalence of 9.2% (95%CI 8.4 – 10.0), an incidence rate of 1.3 (95% CI 1.1–1.4) episodes of acute GI per person-year, and an average probability that an individual developed illness in the year of 71.6% (95% CI 68.0–74.8), weighted by population size were observed. The average duration of illness was 3.7 days, translating into 19.2 million days annually of acute GI in BC.The results corroborate those from previous Canadian and international studies, highlighting the substantial burden of acute GI.Gastrointestinal illness (GI) is a global public health concern. In developed countries, GI is typically mild and self-limiting, but has considerable economic impact due to high morbidity [1-3]. Recent studies on the burden of GI in the general population of a number of countries have been reported [4-12]. To estimate the burden of GI in the Canadian population, the Public Health Agency of Canada (PHAC; formerly Health Canada) developed the National Studies on Acute Gastrointestinal Illness (NSAGI) initiative in 2000. Population-based studies, designed to describe self-reported, acute GI in selected Canadian populations, are part of this initiative. In March 2002, the PHAC completed the first such population study in the City of Hamilton, Ontario, Canada [13]. In order to determine if the burden of GI was the same across the country, a second population study was completed in the province of British Columbia (BC) in June 2003. Additionally, since public health in Canada is primarily a provincial responsibility, this study was conducted to provide information to BC policy makers. The current paper describes the frequen
Benützung der indexzahlen, die bei der zuchtwertsch?tzung der schweine in ungarn verwendet werden
J Kovacs
Genetics Selection Evolution , 1978, DOI: 10.1186/1297-9686-10-4-586a
Abstract:
The Static Characteristic Loop and the External Demagnetizing Factor  [PDF]
J. Takacs, Gy. Kovacs, L. K. Varga
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.310100
Abstract: In this paper we demonstrate, that shearing is changing only one parameter of the static loop. By using the shearing factor Ns, linked to the widely used, demagnetization coefficient ND, we show the one parameter link between the static unsheared and that of the sheared saturation loop, obtained by a non-toroidal, open circuit hysteresis measurement. The paper illustrates the simple relation between open circuit loop data and measured real static saturation data. The proposed theory is illustrated by using the hyperbolic model. For experimental illustration, tests results are used, which were carried out on two closed and open toroidal samples, made of NO Fe-Si electrical steel sheet, mimicking the demagnetization effect of the open circuit VSM measurement. These are both theoretical and experimental demonstrations, that shearing only changes the inclination of the static hysteresis loop. These test results, presented here, agree very well with the calculated results, based on the proposed method.
Stacked High-Impedance Surface (HIS) for 5 GHz WLAN Applications
P. Kovacs,J. Puskely
Radioengineering , 2013,
Abstract: In this work we present a stacked high-impedance surface (HIS) for low-profile, high-gain, 5 GHz WLAN antennas. The structure consists of two layers: a lower mushroom layer and an upper planar layer. We demonstrate that the stacked geometry has much better properties than conventional single-layer structures for achieving simultaneously surface-wave suppression and zero reflection phase at a given frequency. We show by measurements that the designed stacked HIS exhibits both a large band gap and in-phase wave reflection over the entire range from 4.6 GHz to 6.4 GHz. The structure is realized on FR4 substrate using standard etching technology to make fabrication easy and cheap.
COENOLOGICAL DIFFERENTIATION OF PEUCEDANUM SPECIES (SECT. PEUCEDANUM) STANDS IN THE CARPATHIAN BASIN
J.A. KOVACS
Annali di Botanica , 2011,
Abstract: Species of Peucedanum (sect. Peucedanum) with closer botanical relationships were source of taxonomic, ecologic and coenologic incertitudes. Coenological studies of grassland vegetation in the Carpathian basin completed with the ecological indicators contributed to the foundation some coeno-ecological species groups, which can express and characterize the coenological differentiation of the Peucedanum-species and stands. Thus, various stands of P. officinale are characterized by distinctive group of species for dry, humid and semi-dry salt meadows, P. longifolium by groups for rupicolous submediterranean habitats, P. rochelianum by a group of fen and wet meadows, P. tauricum by a group of xerothermic fringe vegetation and an other for stepic grasslands. It is presented the vegetation structure, local diagnostics, constant and dominant species of recently described plant community: Inulo ensifoliae-Peucedanetum tauricae.
Cyclic AMP stimulates platelet-derived growth factor B chain mRNA expression in murine macrophage cell lines
Elizabeth J. Kovacs,Susan VanStedum
Mediators of Inflammation , 1995, DOI: 10.1155/s0962935195000470
Abstract:
Families of canonically polarized varieties over surfaces
Stefan Kebekus,Sandor J. Kovacs
Mathematics , 2005,
Abstract: Shafarevich's hyperbolicity conjecture asserts that a family of curves over a quasi-projective 1-dimensional base is isotrivial unless the logarithmic Kodaira dimension of the base is positive. More generally it has been conjectured by Viehweg that the base of a smooth family of canonically polarized varieties is of log general type if the family is of maximal variation. In this paper, we relate the variation of a family to the logarithmic Kodaira dimension of the base and give an affirmative answer to Viehweg's conjecture for families parametrized by surfaces.
The structure of surfaces mapping to the moduli stack of canonically polarized varieties
Stefan Kebekus,Sandor J. Kovacs
Mathematics , 2007,
Abstract: Generalizing the well-known Shafarevich hyperbolicity conjecture, it has been conjectured by Viehweg that a quasi-projective manifold that admits a generically finite morphism to the moduli stack of canonically polarized varieties is necessarily of log general type. Given a quasi-projective surface that maps to the moduli stack, we employ extension properties of logarithmic pluri-forms to establish a strong relationship between the moduli map and the minimal model program of the surface. As a result, we can describe the fibration induced by the moduli map quite explicitly. A refined affirmative answer to Viehweg's conjecture for families over surfaces follows as a corollary.
The structure of surfaces and threefolds mapping to the moduli stack of canonically polarized varieties
Stefan Kebekus,Sandor J. Kovacs
Mathematics , 2008,
Abstract: Generalizing the well-known Shafarevich hyperbolicity conjecture, it has been conjectured by Viehweg that a quasi-projective manifold that admits a generically finite morphism to the moduli stack of canonically polarized varieties is necessarily of log general type. Given a quasi-projective threefold Y that admits a non-constant map to the moduli stack, we employ extension properties of logarithmic pluri-forms to establish a strong relationship between the moduli map and the minimal model program of Y: in all relevant cases the minimal model program leads to a fiber space whose fibration factors the moduli map. A much refined affirmative answer to Viehweg's conjecture for families over threefolds follows as a corollary. For families over surfaces, the moduli map can be often be described quite explicitly. Slightly weaker results are obtained for families of varieties with trivial, or more generally semi-ample canonical bundle.
Are minimal degree rational curves determined by their tangent vectors?
Stefan Kebekus,Sandor J. Kovacs
Mathematics , 2002,
Abstract: Let X be a projective variety which is covered by rational curves, for instance a Fano manifold over the complex numbers. In this setup, characterization and classification problems lead to the natural question: "Given two points on X, how many minimal degree rational curve are there which contain those points?". A recent answer to this question led to a number of new results in classi?cation theory. As an infinitesimal analogue, we ask "How many minimal degree rational curves exist which contain a prescribed tangent vector?" In this paper, we give sufficient conditions which guarantee that every tangent vector at a general point of X is contained in at most one rational curve minimal degree. As an immediate application, we obtain irreducibility criteria for the space of minimal rational curves.
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