Search Results

1 - 10 of 701 items :

Clear All

Introduction High-altitude balloons (HABs) have long been used for experimental access to both the lower and upper atmosphere, including the troposphere and stratosphere. There are various methods for accessing the stratosphere, including meteorological rockets ( Imshenetsky et al., 1976 ), fixed-wing aircraft ( Smith et al., 2009 ), mountaintop observatories ( Smith et al., 2011 ), and high-altitude weather balloons ( Bryan et al., 2014 ); however, HABs are unmatched in their affordability, versatility, and high payload-to-vehicle-mass ratio. In addition

of China press, Beijing. GÄMPERLE, E. and J. J. SCHNELLER (2002): Phenotypic and isozyme variation in Cystopteris fragilis (Pteridophyta) along an altitudinal gradient in Switzerland. Flora 197: 203-213. GUO, G., Z. S. LI, Q. B. ZHANG, K. P. MA and C. L. MU (2009): Dendroclimatological studies of Picea likiangensis and Tsuga dumosa in Lijiang, China. IAWA J 30: 435-441. HAHN, T., C. J. KETTLE, J. GHAZOUL, E. R. FREI, P. MATTER and A. R. PLUESS (2012): Patterns of genetic variation across altitude in three plant species of semi-dry grasslands. PLoS One 7(8): e41608

References Abdulmalek K., Ashur F., Ezer N., Fengchun Y., Magder S., Hussain S.N.A. (2001). Differential expression of Tie-2 receptors and angiopoietins in response to in vivo hypoxia in rats. Am. J. Physiol., 281: L582- L590. Abelson A.E. (1976). Altitude and fertility. Human Biology, 48: 83-92. Adedara I.A., Nanjappa M.K., Farombi E.O., Akingbemi B.T. (2014). Aflatoxin B1 disrupts the androgen biosynthetic pathway in rat Leydig cells. Food Chem. Toxicol., 65: 252-259. Baker J., Hardy M.P., Zhou J., Bondy C., Lupu F., Belleu A.R., Efstratiadis A. (1996). Effects

302: 23-24. JONSSON, S., B. GUNNARSON and C. CRIADO (2002): Drought is the major limiting factor for tree-ring growth of high-altitude Canary Island pines on Tenerife. Geografiska Annaler Series A-Physical Geography 84 A: 51-71. KARA, N., L. KOROL, K. ISIK and G. SCHILLER (1997): Genetic diversity in Pinus brutia Ten.: altitudinal variation. Silvae Genetica 46: 155-161. KLUMPP, R. T. and M. STEFSKY (2004): Genetic variation of Pinus cembra along an elevational transect in Austria, pp. 136-140. In: Breeding and genetic resources of five-needle pines: growth

Uptake and Energy Cost of Exercise Under Normoxia in Elite Biathletes. J Sports Sci Med. 2014 Dec 1;13(4):912-20. 5. Vargas-Pinilla OC. Exercise and Training at Altitudes: Physiological Effects and Protocols. Rev Cienc Salud. 2014;12(1):107-122. DOI: 10.12804/ revsalud12.1.2014.07. 6. Bernaciková M. Physiology, publisher Masaryk University, 2012, Brno, ISBN 978-80-210-5842-2, https://publi.cz/books/50/12.html. 7. Máček M, Radvanský J. Fyziologie a klinické aspekty pohybové aktivity. Praha: Galén, 2011; 245. 8. Drăgan I. Medicina sportivă. Ed. Medicală Bucureşti, 2002

Summary

We introduce the altitudes of a triangle (the cevians perpendicular to the opposite sides). Using the generalized Ceva’s Theorem, we prove the existence and uniqueness of the orthocenter of a triangle [7]. Finally, we formalize in Mizar [1] some formulas [2] to calculate distance using triangulation.

Abstract

The bicoloured white-toothed shrew (Crocidura leucodon) was found near the railway station at Horní Blatná, Krušné hory Mts., 870 m a. s. l., on 10 September 2017. It is the highest altitude record of C. leucodon in the Czech Republic, where this species is considered to be a typical inhabitant of lower and warmer regions.

Introduction The hypobaric hypoxic conditions induced by increasing the altitude have profound effects on athletic performance ( Kenney et al., 2012 ; Levine et al., 2008 ). Physical factors due to the reduction in the barometric pressure (hypobaric) and/or physiological factors arising from the reduced partial pressure of oxygen in the inspired air (hypoxia) may be responsible for the changes in physical performance ( Levine et al., 2008) . As the altitude increases, aerobic performance and maximal oxygen uptake are impaired due to the hypoxic environment

. Catena 140: 43–54. Carletti P., Vendramin E., Pizzeghello D., Concheri G., Zanella A., Nardi S., Squartini A., 2009. Soil humic compounds and microbial comminities in six spruce forests as function of parent material, slope aspect and stand age. Plant and Soil 315: 47–65. Cienciala E., Exnerova Z., Macku J., Henzlik V., 2006. Forest topsoil organic carbon content in Southwest Bohemia region. Journal of Forest Science 52: 387–398. Couteaux M.M., Sarmiento L., Bottner P., Acevedo D., Thiery J. M., 2002. Decomposition of standard plant material along an altitudal transect

statystyczna w psychologii i pedagogice. Wydawnictwo Naukowe PWN, Warszawa. Kmeť J., Lukáčik I., Tomanová S. 1994. Bioindication of the stress on needles of mountain pine ( Pinus mugo ) at different altitudes. Acta Facultatis Forestalis Zvolen 36: 41–50. Lukáčik I., Repáč I. 1992. Evaluation of growth of seedlings of Swiss mountain pine knee-pine ( Pinus mugo ) upon various substrata. Acta Facultatis Forestalis Zvolen 34: 127–135. Łomnicki A. 2014. Wprowadzenie do statystyki dla przyrodników. Wydawnictwo Naukowe PWN, Warszawa. Marcet E. 1967.Über den Nachweis spontaner