As generalizations of Uq(sl2), a class of algebras Uq(f(K)) were introduced and studied in [7]. For some special parameters f(K) = a(Km − K−m), a 6= 0, m ∈ N, Uq(f(K)) are Hopf algebras and hence quantum groups in the sense of Drinfeld ([3]). In this paper, we realize these algebras as Hyperbolic algebras ([12]). As an application of this realization, we obtain a natural construction of irreduc...

We define Whittaker modules for the twisted Heisenberg-Virasoro algebra and obtain analogues to several results from the classical setting, including a classification of simple Whittaker modules by central characters.

Over 10 million hectares of forests in the western United States are in need of restoration. Restoration targets benefit from quantitative descriptions but many old-growth definitions are qualitative. Quantification of live forest structure and mortality in Jeffrey pine-mixed conifer forests in the Sierra San Pedro Martir (SSPM), Mexico, was done to assist in the development of restoration goal...

this paper presents theoretical and numerical state-of-the-art information in the field of hygro-thermo-mechanical deformation simulation in structural concrete. the aspects discussed include coupled hygro-thermo-mechanical performance of porous materials including concrete, multi-scale simulation of concrete properties especially the volumetric and structural deformation performance, and the m...

Many topographic characteristics of the landscape (e.g. relief, slope, aspect, gradient, slope curvature, slope length and contour curvature) play important roles in the distribution of vegetation and biodiversity (e.g. Merriam, 1890, 1894; Whittaker & Niering, 1965, 1968; Vuilleumier, 1970; Brown, 1971, 1978; Hastings et al., 1972; Simpson, 1975; Hanawalt & Whittaker, 1976; Whittaker, 1977; Be...

the study was carried out in the ilam oak forest that is located in the west part of iran. the objective of this research was to determine the plant ecological groups and site classification in this region. data were collected from 117 sample plots using the systematic-random sampling method. the size of sampling plots was 20 m?20 m for the tree and shrub species and 1.5 m ?1.5 m for herbaceous...

the present survey was carried out in oak (quercus brantii lindl.) woodlands of arghvan valley protected area, in ilam province, western iran. the main aim of this study was to survey the understory vegetation of oak in different classes of altitude (1400-1600, 1600-1800 and >1800 m) in the southern aspects, and their relationship with physical and chemical properties of soil. four transects, w...

MRC-5 cells grown in shell vials from three suppliers (Whittaker Bioproducts, Bartels, and ViroMed) were evaluated for sensitivity to human cytomegalovirus. Previous studies done in our laboratory showed that treatment of the cells with dexamethasone (DEX) and dimethyl sulfoxide (DMSO) or these agents plus calcium improved the sensitivity of cells from Whittaker. In this study, we compared the ...