Search results for "Limiting"
showing 10 items of 219 documents
Participation and performance trends in 'Ultraman Hawaii' from 1983 to 2012
2013
Abstract Background Participation and performance trends have been investigated in a single stage Ironman triathlon such as the ‘Ironman Hawaii,’ but not for a multi-stage ultra-triathlon such as the ‘Ultraman Hawaii’ covering a total distance of 515 km. The aims of this study were to analyze (1) changes in participation and performance, (2) sex-related differences in overall and split time performances, and (3) the age of peak performance in Ultraman Hawaii. Methods Age and race times including split times for 98 women and 570 men who successfully finished Ultraman Hawaii (day 1 with 10-km swimming and 145-km cycling, day 2 with 276-km cycling, and day 3 with 84-km running) between 1983 an…
Increased ventilation by fish leads to a higher risk of parasitism
2014
Background: Fish are common intermediate hosts of trematode cercariae and their gills can potentially serve as important sites of penetration by these larval stages. We experimentally tested the hypothesis that volume of ventilation flow across the gills contributes to acquisition of these parasites by fish. We manipulated the intensity of ventilation by using different oxygen concentrations. Methods: Juvenile Oncorhynchus mykiss were individually exposed for 10 minutes to a standard dose of Diplostomum pseudospathaceum cercariae at three levels of oxygen concentration, 30, 60 and 90%. Ventilation amplitude (measured as a distance between left and right operculum), operculum beat rate, and …
Is morphokinetic analysis the answer?
2013
Abstract Efforts aimed at improving pregnancy rates have focused on the search for additional markers of viability to supplement current criteria for embryo selection. Time-lapse technology represents a powerful tool in assisted reproduction for evaluating embryos dynamically. Whilst standard methods of embryo assessment are based on subjective morphology evaluation at discrete time points, thereby limiting the information produced for embryo selection, time-lapse recording introduces several additional morphokinetic parameters for embryo evaluation. This additional information can improve implantation rates and reproductive outcomes. This review surveys available knowledge on time-lapse im…
La reforma de la negociación colectiva en la ley 3/2012
2012
En el presente estudio se analizan las reformas en el régimen jurídico de la negociación colectiva mediante la Ley 3/2012 (precedida por el RDL 3/2012) y el RDL 20/2012, que han perjudicado y dificultado algunas de las funciones esenciales de la negociación colectiva para la evitación de vacíos de regulación, progreso en las condiciones de trabajo y freno a la individualización, y que han hecho girar el eje de la negociación hacia la empresa, solución poco realista en un marco productivo dominado por la microempresa y que otorga más poder al empleador. Las reformas han afectado sobre todo a la situación del convenio una vez finalizada su vigencia pactada (régimen de prórroga), a la estructu…
Simple method for limiting delay of optimized interleavers for turbo-codes
2000
An iterative interleaver growth algorithm is extended to allow the delay and required memory of designed interleavers to be halved with negligible performance loss. The original algorithm is efficient for two-component parallel concatenated turbo-codes with given constituent encoders that are optimum with regard to a cost function satisfying some mild conditions. However, it is only actually optimum if the selected set of patterns is representative of low-weight turbo-codewords. The new interleaver uses all terminating error patterns having an input weight not greater than a fixed IWX and single-coder output weight not greater than WX is proposed.
Evaluation of in-farm versus weather station data for use as heat stress indicator in dairy sheep
2005
AbstractHeat stress is a limiting factor in dairy production in hot climates impairing growth, milk production and reproduction. The most widely investigated climatic factors related with heat stress are: air temperature and relative humidity. Previously dairy sheep studies of heat tolerance depended on measurements of physiological functions on individual animals such as rectal temperatures, respiration rates or volumes of air inhaled; unfortunately, such measurements are costly and not feasible on a large scale. This study aims to evaluate in-farm (IF) versus weather station (WS) data to be used as heat stress indicator in dairy sheep. Data were collected in three farms in November 2002 t…
The QCD analytic effective charge and its dependence on the pion mass
2004
A new model for the QCD analytic running coupling, which incorporates the effects due to the $\pi$ meson mass, is proposed. The properties of this invariant charge in spacelike and timelike regions are examined. Its main distinctive features are a finite infrared limiting value, which depends on the pion mass, and the "plateau-like" behavior in the deep infrared domain of the timelike region.
Kinetik der energieverbrauchenden Rückreaktion in der Atmungskette
1964
Die Kinetik der energieabhangigen Ruckreaktionen der Atmungskette wird fur die Atmungskettenkomponenten gemessen. Energiezufuhr wird durch Zusatz von ATP ausgelost. Die relative Geschwindigkeit der Ruckreaktion und der untersuchten Reaktionsschritte ist gleich gros (0,30 sec−1) bei 15°. Die Halbsattigungskonstante fur ATP in der Ruckreaktion ist 40 μM. Geschwindigkeitslimitierend fur die Ruckreaktion in der Atmungskette ist die Energieuberfuhrung von ATP. Die Hinreaktionen der Atmungskette, soweit sie zur Phosphorylierung gekoppelt ist, wird ebenfalls durch die Energieuberfuhrung auf ADP limitiert. Hohe Geschwindigkeiten der Hinreaktion lassen sich bei Entkopplung messen. Die Befunde deuten…
Establishing a soil loss threshold for limiting rilling
2015
In this paper a frequency analysis of event soil loss measurements collected in the period 1999–2012 at the microplots and plots of the Sparacia Experimental Area in Sicily, southern Italy, was developed. The analysis was carried out using the annual maximum soil loss measurements normalized by the mean soil loss measured at a given temporal and spatial scale. The empirical frequency distribution of the normalized variable was well fitted by two Gumbel’s theoretical probability distributions discriminated by a value of the normalized variable equal to 2. This last value discriminates between the relatively low and frequent values of the normalized variable and the high and rare ones. The an…
Infracyanine Green vs. Brilliant Blue G in Inverted Flap Surgery for Large Macular Holes: A Long-Term Swept-Source OCT Analysis
2020
Background and Objectives: To compare the long-term toxicity of infracyanine green (IFCG) to brilliant blue G (BBG) in inverted internal limiting membrane flap surgery (I-ILMFS) for large, full-thickness macular holes (FTMHs). Materials and Methods: Prospective randomized study including 39 eyes with &ge