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Search Results: 1 - 10 of 4731 matches for " ?rt Marin?ek "
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Functional electrical stimulation with surface electrodes
Bajd Tadej,rt Marinek,Munih Marko
Journal of Automatic Control , 2008, DOI: 10.2298/jac0802003b
Abstract: The review investigates the objective evidences of benefits derived from surface functional electrical stimulation (FES) of lower and upper extremities for people after incomplete spinal cord injury (SCI) and stroke. FES can offer noticeable benefits in walking ability. It can be efficiently combined with treadmill and body weight support. Voluntary muscle strength and endurance gain can be achieved through FES assisted gait training together with increased gait velocity in absence of electrical stimulator. Cyclic FES, FES augmented by biofeedback, and FES used in various daily activities can result in substantial improvements of the voluntary control of upper extremities.
Vegetation of the Strmec Forest Remnant
Lojze Marin ek, Aleksander Marin ek
Hacquetia , 2009, DOI: 10.2478/v10028-009-0002-2
Abstract: The virgin forest remnant Strmec is located in the southern part of Slovenia (Ko evsko region) and expands over 15.55 ha between 850 and 940 metres above sea level. Special attention is given to phytosociological and pedological surveys. A vegetation map was also made. The virgin forest is dominated by Dinaric fir-beech forests, namely by the geographical variant of the association Omphalodo-Fagetum var. geogr. Calamintha grandiflora with the following subassociations and variants: -festucetosum altissimae, -galietosum odorati, -typicum, -mercurialetosum perennis, -phyllitidetosum, -neckeretosum crispae, -caricetosum albae subass. nova var. Neckera crispa var. nova and var. Helleborus niger. var. nova. The bedrock is mainly limestone and dolomite, which prevail in the south-western part of the virgin forest remnant. The most frequent soil types are rendzina on limestone, Rendzic Leptosol and Dystri-Chromic Cambisol.
Ni-YSZ Substrate Degradation during Carbon Deposition
Marinek, Marjan
Boletín de la Sociedad Espa?ola de Cerámica y Vidrio , 2011, DOI: 10.3989/cyv.182011
Abstract: Carbon deposition on various Ni-YSZ catalytic composites with average Ni particle size from 0.44 mm to 0.98 μm was studied under dry CH4-Ar and humidified CH4-Ar conditions. The change in the catalytic activity was monitored both as a mass gain due to carbon deposition and hydrogen evolution due to CH4 dehydrogenation on Ni-YSZ. Regarding the start of methane decomposition and subsequent catalyst deactivation rate, composites with smaller Ni-grains were much more active in comparison to those with relatively large grains. Dry methane conditions always caused coking of the catalyst substrate with substantial activity loss. In contrast, under humidified methane atmosphere conditions with a steam to carbon (S/C) ratio of 0.82, catalytic activity of the Ni-YSZ composites remained nearly undiminished after 2,000 minutes at chosen deposition temperatures (600–800 °C). On the catalyst surface, some encapsulation of Ni with the deposited carbon was noticed while carbon filaments grew inside the treated samples. The dimensions of C-filaments were influenced by treatment conditions and Ni-YSZ substrate morphology. La deposición de carbón en diferentes compuestos catalizadores Ni-YSZ con un tama o promedio de partícula Ni de 0.44 mm a 0.98 μm fue estudiado bajo condiciones secas: CH4-Ar y húmedas: CH4-Ar. El cambio de la actividad catalítica fue monitoreado tanto como una ganancia de masa debida a la deposición de carbón y una evolución de hidrógeno debido a la deshidrogenación de CH4 en Ni-YSZ. En cuanto al comienzo de descomposición del metano y a la subsiguiente desactivación del catalizador, aquellos compuestos con granos Ni menores fueron mucho más activos en comparación a aquellos con granos relativamente mayores. Las condiciones secas del metano siempre causaron coquificación del sustrato del catalizador con una sustancial pérdida de actividad. Por el contrario, en el metano bajo una atmósfera húmeda con un ratio S/C de 0.82, la actividad catalizadora de los compuestos Ni-YSZ permaneció prácticamente sin disminuciones luego de 2,000 minutos bajo las temperaturas de deposición seleccionadas (600–800 °C). En la superficie de catalización se observó cierta encapsulación de Ni con el carbón depositado, mientras que los filamentos de carbón se desarrollaron dentro de las pruebas tratadas. Las dimensiones de los filamentos C fueron influenciados por las condiciones del tratamiento y la morfología del sustrato Ni-YSZ.
Illyrian Pre-Alpine Fir and beech Forests - The Association Homogyno Sylvestris-Fagetum Marin ek et al. 1993
Lojze Marin ek, Andra arni
Hacquetia , 2007, DOI: 10.2478/v10028-007-0007-7
Abstract: The work deals with the association Homogyno sylvestris-Fagetum in the pre-Alpine region of Slovenia. The communitis were classified into a geographical race typica and divided into six subassociations: typicum subass. nova, mercurialetosum perennis subass. nova, festucetosum altissimae subass. nova, calamagrostietosum variae subass. nova, luzuletosum sylvaticae subass. nova and vaccinietosum myrtilli subass. nova. The results are shown in the analytical table, as well as in two diagrams.
LANDING QUALITY IN ARTISTIC GYMNASTICS IS RELATED TO LANDING SYMMETRY
Ivan ?uk,Miha Marinek
Biology of Sport , 2013,
Abstract: In gymnastics every exercise finishes with a landing. The quality of landing depends on subjective (e.g. biomechanical) and objective (e.g. mechanical characteristics of landing area) factors. The aim of our research was to determine which biomechanical (temporal, kinematic and dynamic) characteristics of landing best predict the quality of landing. Twelve male gymnasts performed a stretched forward and backward salto; also with 1/2, 1/1 and 3/2 turns. Stepwise multiple regression extracted five predictors which explained 51.5% of landing quality variance. All predictors were defining asymmetries between legs (velocities, angles). To avoid asymmetric landings, gymnasts need to develop enough height; they need higher angular momentum around the transverse and longitudinal axis and they need to better control angular velocity in the longitudinal axis.
Chyby v doskocích v prostnych mu Landing errors in men's floor exercise
Miha Marinek,Iva ?uk
Acta Universitatis Palackianae Olomucensis : Gymnica , 2008,
Abstract: Ve vyzkumu jsme se zamě ili na p í iny chyb v doskoku v prostnych v mu ské sportovní gymnastice. Na ím cílem je stanovit parametry charakteristik doskoku, které ovlivňují záva nost chyby v dopadu. Analyzovali jsme p emety provedené v emi gymnasty (n = 97) soutě ícími na kvalifi ka ní soutě i Mistrovství Evropy 2004 v Lublani. Podle teoretického modelu pro hodnocení doskok p i p emetech v prostnych jsme stanovili proměnné. Vysledky ukazují, e nejú inněj í je měkky doskok, zatímco neúplné obraty zp sobují záva né chyby. Doskok po p emetu bez obratu je optimální s nohama u sebe (pokud se gymnastovy schopnosti levé a pravé nohy neli í) a se vzpa enyma rukama. In our research we focused on the reasons for the magnitude of landing errors in floor exercise in men's artistic gymnastics. Our goal is to determine the parameters of the landing characteristics which have an influence on the magnitude of landing mistakes. We analyzed flips which were performed by all gymnasts (n = 97) competing in the qualification rounds of the European Championships in the year 2004 in Ljubljana. We defined the variables according to the theoretical model for the evaluation of flip landings in floor exercises. The results show that a soft landing is most effective, incomplete twists are the reason for large errors, landing after performing flips without twists is optimal with the feet together (unless the gymnast's abilities of his/her left and right leg are different) and the arms' positions at the time of the touch down should be upward.
OXIDATIVE EFFECTS OF DIFFERENT DIETARY FATS ON MOUSE DNA DETECTED BY COMET ASSAY
Romana Marinek Logar,Karl Salobir
Poljoprivreda (Osijek) , 2000,
Abstract: Here we report on the introduction of the Comet assay for the in vivo testing of oxidative effects of different polyunsaturated dietary fats on mouse nuclear DNA. Five groups of mice were fed with the diet of the same composition but with different fat supplementation: 1st group - oleic acid rich sunflower oil, 2nd group - sunflower oil, 3rd gruop - rape oil, 4th group - lard, 5thgroup - control group. Fats with different degrees of unsaturation have caused different degrees of mice DNA damage. The highest degree of DNA damage (2.72) was found in the group fed with oleic acid rich sunflower oil. The lowest degree of DNA damage was found in the control group. The results obtained indicate that Comet assay is sensitive enough to differentiate the quality of nutritional fats from the view of free radicals formation.
HEALTH SUITABILITY CRITERIA OF FOOD OF ANIMAL ORIGIN
Andrej Kirbi?,Janez Marinek,Stanka Grebenc
Poljoprivreda (Osijek) , 2000,
Abstract: Criteria of health suitability of food of animal origin are presence of causing agents of zoonosis and alimentary diseases, presence of environmental pollutants and substances, used in the veterinary treatments, radioactive contamination and senzoric changes. Hygienic irrevocability is guaranteed by a conscientious veterinary-sanitary inspection, strict discipline of breeders of slaughter animals and producers of milk but also by well-informed consumers and especially those who are professionally involved in the preparation of food.
Rapid heuristic projection on simplicial cones
A. Ekárt,A. B. Németh,S. Z. Németh
Mathematics , 2010,
Abstract: A very fast heuristic iterative method of projection on simplicial cones is presented. It consists in solving two linear systems at each step of the iteration. The extensive experiments indicate that the method furnishes the exact solution in more then 99.7 percent of the cases. The average number of steps is 5.67 (we have not found any examples which required more than 13 steps) and the relative number of steps with respect to the dimension decreases dramatically. Roughly speaking, for high enough dimensions the absolute number of steps is independent of the dimension.
Using a different growth medium greatly improves distinction of Butyrivibrio fibrisolvens and Pseudobutyrivibrio xylanivorans strains by the cellular fatty acids and aldehydes profiles
Ma a Zorec, Ma a Vodovnik, Romana Marin ek Logar
Acta agriculturae Slovenica , 2011, DOI: 10.2478/v10014-011-0009-5
Abstract: A total of 11 ruminal strains currently assigned to Butyrivibrio fibrisolvens and Pseudobutyrivibrio xylanivorans were cultivated in two different media, rumen fluid containing M2 and short-chain fatty acid (SCFA) containing M330, and their cellular fatty acid methyl esters (FAME) and dimethylacetals (DMA) were analyzed using gas chromatography. A comparison of the FAME/DMA compositions revealed that the difference in SCFA contents in the growth medium induced a pronounced quantitative effect on the cellular branched-chain fatty acid and aldehydes proportions only in the P. xylanivorans strains. This study shows that FAME/DMA analysis is a powerful chemotaxonomic tool in the group of phenotypically similar rumen butyrivibria especially when the influence of the growth medium is evaluated.
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