THE word ichthyosis is derived from the Greek word Ichthys meaning a fish. Patients with ichthyosis exhibit prominent scales occurring more or less diffusely all over the body. Usually the scales are large and centrally adherent with loose edges. Ichthyosis is a disorder of keratinization. Ichthyosis forms a group of genodermatoses transmitted by autosomal dominant or, as recently shown by Well...

Imprecise probabilistic beliefs are modelled as incomplete comparative likelihood relations admitting a multiple-prior representation. We provide an axiomatization of such relations for the case in which the set of priors is “convex-ranged”. We also show that the multiple-prior representation is unique whenever the set of priors is “almost-convex-ranged”. Such uniqueness ensures the adequacy of...

Although cheatgrass (Bromus tectorum) has been widely distributed across western rangelands for >70 years, the full ecologic and economic impacts of this non-native invasive plant have not yet occurred. Unfortunately, several independent lines of evidence indicate that the rate at which acreage becomes infested with cheatgrass is increasing rapidly. Furthermore, the invasion and spread of a num...

Rangelands essentially comprise geographical regions dominated by grass with or without scattered woody plants. Rangelands are often considered to function primarily as feed for livestock. In this view, conservation and biodiversity issues are secondary. The alternate view involves recognising rangelands as a biome without a specific function, but where there is an implied responsibility for in...

(2021). Montane rangelands in a changing world. African Journal of Range & Forage Science: Vol. 38, Rangelands Changing World, pp. iii-vi.

Rangelands of China have for centuries provided forage for livestock but now their role in water, soil, and biodiversity conservation is being recognised by Governments and people. However, much of the rangelands has recently degraded anddesertification is nowawidespread problem.The cause of the degradation is over-grazing andover-cultivation. Climate change is exacerbating theproblem.TheChines...

In previous papers we have considered the optimal mix of biodiversity in semi-arid rangelands, focusing on the steady state. This paper addresses the question of conservation in the optimal use of rangelands, where conservation is understood to mean maintenance of the system in a ‘natural’ state. We consider a rangeland that may exist in one of two states. In the ‘natural’ state, its dynamics a...

The evaluation of vegetation covers using conventional methods is difficult over arid areas due to several reasons such as lack of the suitable roads to these regions. Moreover, this task is time-consuming. For these reasons, remote sensing has been considered as an economic alternative for conventional field work. In this study, the feasibility of using IRS images in vegetation cover evaluatio...

administrative regulations for water flow decrease distribution efficiency and effect the economical operation of irrigation networks. complications in distribution systems and the decrease in availability of water require study of the hydraulic performance of existing flow control structures. control systems designed by neyrpic (zayandeh rud network) and usbr (doroodzan network) were investiga...

W artykule podjęto problem opracowania wydajnej technologii wzbogacania rud hematytu. Celem badań jest zbadanie właściwości procesowych słabo rozsianych hematytu Ukrainy, z uwzględnieniem ich mineralogicznych, opracowanie schematów oraz ocena skuteczności separacji minerałów podczas grawitacyjnego, magnetycznego i metody flotacji.Badania przeprowadzono na próbce krzyworoskiego zagłębia żelaza U...