Woody Plant Invasion of Grasslands: Establishment of Honey Mesquite (Prosopis glandulosa var. glandulosa) on Sites Differing in Herbaceous Biomass and Grazing History Author(s): J. R. Brown and Steve Archer Source: Oecologia, Vol. 80, No. 1 (1989), pp. 19-26 Published by: Springer in cooperation with International Association for Ecology Stable URL: http://www.jstor.org/stable/4219003 Accessed:...

Vector autoregressions (VAR) are extensively used to model economic time series. The large number of parameters is the main diicult with VAR models, however. To overcome this, Litterman (1986) suggests to use a Bayesian strategy to estimate the VAR, equation by equation, where, a priori, the lags have decreasing importance (known as Litterman Prior). In this paper, a VAR model is analyzed throu...

This paper will try to look into the two important methods for the calculation of Value at Risk (VaR) for non linear portfolio using Monte Carlo Simulation method. The two techniques Closed form VaR and Multilevel Monte Carlo VaR for valuing the derivative portfolio are explained in details. In case of multilevel Monte Carlo simulation, it has been found that with decrease in the number of inne...

Antigenic variation of Plasmodium falciparum is mediated by a mutually exclusive expression mechanism that limits expression to an individual member of the multicopy var gene family. This process determines the antigenic and adhesive phenotype of the infected red blood cell. Previously, we showed that var gene switching is influenced by chromosomal position. Here, we address whether var gene tr...

Superelastic wires and diamond-shaped stent surrogates were manufactured from Nitinol rods and tubing, respectively, from five different mill product suppliers - Standard VAR, Standard VIM, Standard VIM+VAR, Process-Optimized VIM+VAR, and High-Purity VAR. High-cycle fatigue tests up to 10(7) cycles were conducted under tension-tension conditions for wires and bending conditions for diamonds. Th...

Salinity and drought response alleviate caffeine content of young leaves Coffea canephora var. Robusta cv. S274Avinash Kumar,Gyanendra Kumar Naik,P. S. Simmi,Parvatam Giridhar

Some enzymatic activities of lysosomes have been localized, wi th histochemical techniques applied to l ight microscopy, as fine granular deposits in the absorbing cells of the intestinal mucosa (1, 19). Barka (2), wi th the electron microscope, showed, in the cells of the duodena l villus of mouse, tha t acid phosphatase activity was confined to the dense bodies, the muhives icular bodies, and...

BACKGROUND and Aims The four cultivated Erythroxylum taxa (E. coca var. coca, E. novogranatense var. novogranatense, E. coca var. ipadu and E. novogranatense var. truxillense) are indigenous to the Andean region of South America and have been cultivated for folk-medicine and, within the last century, for illicit cocaine production. The objective of this research was to assess the structure of g...

Members of the genus Dermatocarpon are widespread throughout the Northern Hemisphere along the edge of lakes, rivers and streams, and are subject to abiotic conditions reflecting both aquatic and terrestrial environments. Little is known about the evolutionary relationships within the genus and between continents. Investigation of the photobiont(s) associated with sub-aquatic and terrestrial De...