Seasonal variations of radionuclide concentration in pine needles (Pinus Thunbergii) were examined. The seasonal variations
were classified roughly into two types, one represented by the periodical variation of137Cs concentration and the other represented by a linear decrease of103Ru concentration when plotted on a semi-log scale. Weathering half-lives for the latter type of nuclides were estimated and
a fairly good consistency in the half-lives for different nuclides was observed irrelevant to their radioactive half-lives.
Summary We discuss the existence or the existence and uniqueness of global and local Λ-bounded variation (ΛBV) solutions as well as continuous ΛBV-solutions of nonlinear Hammerstein and Volterra-Hammerstein integral equations formulated in terms of the Lebesgue integral. Since the space of functions of bounded variation in the sense of Jordan is a proper subspace of functions of Λ-bounded variation and for some class of functions φ, the space of functions of bounded φ-variation in the sense of Young is also a proper subspace of the space under consideration, our results extend known results in the literature.
A system has been designed and applied to study variations of the photofraction with distance. A137Cs and a54Mn gamma-source have been used; their distances to the detector were varied and the variations of the photofraction have been studied in the range of 1 to 300 mm.
The purpose of this paper is to introduce and study systems of strong implicit vector variational inequalities. Under suitable
conditions, some existence results for systems of strong implicit vector variational inequalities are established by the Kakutani--Fan--Glicksberg
fixed point theorem.
Authors:D. Ng’uni, N.G. Shargie, S.C. Andersson, A. van Biljon, and M.T. Labuschagne
Ng’uni , D. , Geleta , M. , Hofvander , P. , Fatih , M. , Bryngelsson , T.
2012 . Comparative genetic diversity band nutritional quality variation among some important Southern African sorghum [ Sorghum bicolor (L.) Moench
Experiments were designed to evaluate, in a controlled way, some of the variations that can be expected in radon concentration in soil due mainly to meteorological factors and to close spacing monitoring in the field. Electronic continuous radon monitoring and the track-etch method were used to record the radon -decay. The radon emanation in daily measurements and in long term surveys showed a general effect modulated by temperature and pressure variations. Radon monitoring in soil for nearby stations showed that a 10% range of variation can be expected with the track-etch method and as a result of non-homogeneous emanation pattern of the soil.