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68622. The short time variability of magnetic stars
- Creator:
- Schöneich, W.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- astrophysics, magnetic stars, and short time variability
- Language:
- Czech
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68623. The short- and long-term response of Scrippsiella trochoidea (Pyrrophyta) to solar ultraviolet radiation
- Creator:
- Guan, W. C. and Lu, S. H.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- botanika, botany, growth, photochemical efficiency, Scrippsiella trochoidea, UVR, and ΦPSII
- Language:
- Multiple languages
- Description:
- To assess the short- and long-term impacts of UV radiation (UVR, 280-400 nm) on the microalga Scrippsiella trochoidea, we exposed cells to three different radiation treatments (PAB: 280-700 nm, PA: 320-700 nm, and P: 400-700 nm). A significant decrease in the photochemical efficiency (ΦPSII) at high irradiance (100% of incident solar radiation, 216.0 W m-2) was observed. Photoinhibition was reduced from 62.7 to 10.9% when the cells were placed in 12% solar radiation (26.1 W m-2). In long-term experiments (11 days) using batch cultures, cell densities during the first 5 days were decreased under treaments P, PA, and PAB, reflecting a change in the irradiance experienced in the laboratory to that of incident solar irradiance. Thereafter, specific growth rates increased and UV-induced photoinhibition decreased, indicating acclimation to solar UV. Cells were found to exhibit both higher ratios of repair to UV-related damage, shorter period for recovery and increased concentrations of UV-absorbing compounds (UVabc), whose maximum absorption was found to be at 336 nm. Our data indicate that S. trochoidea is sensitive to ultraviolet radiation, but was able to acclimate relatively rapidly (ca. 6 days) by synthesizing UVabc and by increasing the rates of repair processes of D1 protein in PSII. and W. C. Guan, S. H. Lu.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68624. The significance of baroreflex sensitivity in hypertensive subjects with stroke
- Creator:
- Denisa Čelovská, Jozef Staško, Jozef Gonsorčík, and Diab, A.
- Format:
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, autonomní nervový systém, hypertenze, věk, autonomic nervous system, hypertension, age, baroreflex sensitivity, stroke, 14, and 612
- Language:
- English
- Description:
- The relationship between baroreflex sensitivity expressed in ms/mm Hg (BRS) or in Hz/mm Hg (BRSf) in hypertensives with stroke in comparison with a group of stroke-free patients was evaluated. Twenty-six patients (aged 66±10 years, 11 females/ 15 males) with a history of the first ever ischemic stroke (6 months and more after stroke onset), which was neuroradiologically confirmed, were studied. These were compared to 30 hypertensive patients without history of any cardiovascular event, being of similar age and sex. BRS and BRSf were determined by the sequence and spectral methods (fiveminute non-invasive beat-to-beat recording of blood pressure and inter-beat interval, controlled breathing at a frequency of 0.1 Hz). A significant negative correlation between spontaneous BRS and blood pressure (BP) represented by the grade of hypertension was present (r = -0.52, p<0.001). Differences between hypertensives with and without stroke were detected in BRS obtained by the spectral method (BRS spect p=0.0237, BRSf spect p=0.0285) or BRS obtained by sequence method (BRS seq p=0.0532, BRSf seq p=0.0273). The greatest decline in BRS values was in hypertensive stroke patients with metabolic syndrome, who had BRS values below 3 ms/mm Hg. We found out that BRS and BRSf were more impaired in stroke patients with essential hypertension even 6 months and more after stroke onset than in stroke-free hypertensive patients. This finding was independent of age-dependent decrease of BRS. Examination of baroreflex sensitivity as a marker of autonomic dysfunction along with global cardiovascular risk stratification of individuals seems to be a method for identifying patients at high residual cardiovascular risk., D. Čelovská ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68625. The significance of soil moisture in forecasting characteristics of flood events: A statistical analysis in two nested catchments
- Creator:
- Chifflard, Peter, Kranl, Julius, zur Strassen, Georg, and Zepp, Harald
- Type:
- article, model:article, and TEXT
- Subject:
- soil moisture, runoff prediction, catchment hydrology, spatial-temporal variability, and multivariate statistics
- Language:
- Slovak
- Description:
- We examine the feasibility and added value of upscaling point data of soil moisture from a small- to a mesoscale catchment for the purpose of single-event flood prediction. We test the hypothesis that in a given catchment, the present soil moisture status is a key factor governing peak discharge, flow volume and flood duration. Multiple regression analyses of rainfall, pre-event discharge, single point soil moisture profiles from representative locations and peak discharge, discharge duration, discharge volume are discussed. The soil moisture profiles are selected along a convergent slope connected to the groundwater in flood plain within the small-scale catchment Husten (2.6 km²), which is a headwater catchment of the larger Hüppcherhammer catchment (47.2 km², Germany). Results show that the number of explanatory variables in the regression models is higher in summer (up to 8 variables) than in winter (up to 3 variables) and higher in the meso-scale catchment than in the small-scale catchment (up to 2 variables). Soil moisture data from selected key locations in the small catchment improves the quality of regression models established for the meso-scale catchment. For the different target variables peak discharge, discharge duration and discharge volume the adding of the soil moisture from the flood plain and the lower slope as explanatory variable improves the quality of the regression model by 15%, 20% and 10%, respectively, especially during the summer season. In the winter season the improvement is smaller (up to 6%) and the regression models mainly include rainfall characteristics as explanatory variables. The appearance of the soil moisture variables in the stepwise regression indicates their varying importance, depending on which characteristics of the discharge are focused on. Thus, we conclude that point data for soil moisture in functional landscape elements describe the catchments’ initial conditions very well and may yield valuable information for flood prediction and warning systems.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
68626. The significance of the relationship between main effects and side effects for understanding the Knobe Eeffect
- Creator:
- Waleszczyński, Andrzej , Obidziński, Michał , and Rejewska, Julia
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- asymmetry, intentional action, intentionality, Knobe effect, moral evaluation, moral properties, and side effect
- Language:
- Slovak
- Description:
- The characteristic asymmetry in ascribing intentionality, known as the Knobe effect, is widely thought to result from the moral evaluation of the side effect. Existing research has focused mostly on elucidating the ordinary meaning of the notion of intentionality, while less effort has been devoted to the moral conditions associated with the analyzed scenarios. The current analysis of the moral prop-erties of the main and side effects, as well as of the moral evaluations of the relationship between them, sheds new light on the influence of moral considerations on the attribution of intentionality in the Knobe effect. The moral evaluation of the relationship between the main and side effects is significant in that under certain circumstances it cancels asymmetry in intentionality ascription.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68627. The simulation of the bimodal IMF
- Creator:
- Wolf, M.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- astrophysics, massive molecular clouds, and fragmentation
- Language:
- Czech
- Description:
- The hierarchical fragmentation of a molecular cloud is modelled as a random process by the Monte Carlo method. It is proposed that the IMF for stár formation is bimodal. The probability of the fragmentation in each mode is a function of the initial cloud mass and defined critical mass, which can be derived from the surface density and temperature of cloud. The modelled IMF is compared with the empirically determined function and the best fit was found for critical masses of 0.3 M^ for low-mass mode and 2.0 M„ for high-mass mode of star formation.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68628. The single (and multi) item profit maximizing capacited lot-size (PCLSP) problem with fixed prices and no set-up
- Creator:
- Haugen, Kjetil K., Olstad, Asmund, Bakhrankova, Krystsina, and Van Eikenhorst, Erik
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- heuristics, lot-sizing, dynamic pricing, and specialized algorithm for LP´s
- Language:
- English
- Description:
- This paper proposes a specialized LP-algorithm for a sub problem arising in simple Profit maximising Lot-sizing. The setting involves a single (and multi) item production system with negligible set-up costs/times and limited production capacity. The producer faces a monopolistic market with given time-varying linear demand curves.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68629. The single-valued extension property for sums and products of commuting operators
- Creator:
- Miller, T. L. and Neumann, Michael M.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- single-valued extension property, Dunford’s property $\mathrm (C)$, and decomposable operators
- Language:
- English
- Description:
- It is shown that the sum and the product of two commuting Banach space operators with Dunford’s property $\mathrm (C)$ have the single-valued extension property.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
68630. The situation of social housing in Switzerland
- Creator:
- Glaser, Marie
- Type:
- article, model:article, and TEXT
- Subject:
- comparative housing policy, social housing, housing and urban sustainability, and not-for-profit housing cooperatives
- Language:
- English
- Description:
- Without a national or cantonal policy for the provision of affordable, so-called social housing, Switzerland`s way is unique in Europe. Finding appropriate housing is left to the people themselves. The challenge of building sustainable communities in urban centres in Switzerland has to address the tight housing market due to economic growth, immigration, and the renewed attractiveness of urban living. In the absence of a national low-cost housing policy, every growing city thus has to design its own strategies and implement local policies and programmes in order to counteract such developments. The role of housing cooperatives is important now and in the future. The paper gives an overview on the Swiss situation after the GFC and discusses the successful strategies of the provision and protection of affordable housing in the major city of Zurich.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public