Liquid Hydrogen (LH2) is utilized as a target for the high energy electron beams, up to 20 GeV, available from the two-mile Stanford Linear Accelerator because hydrogen is the purest form of protons attainable and liquefaction increases the density of the protons available for bombardment. This paper will deal with the necessary control systems required for the LH2 target, and special systems d...

In a recent paper (cond-mat/0009279), Fabricius and McCoy studied the spectrum of the spin 1/2 XXZ model at roots of unity, i.e. ∆ = (q + q−1)/2 with q2N = 1 for integer N ≥ 2. They found a certain pattern of degeneracies and linked it to the sl2-loop symmetry present in the commensurable spin sector Sz ≡ 0 mod N . We show that the degeneracies are due to an unusual type of zero-energy “transpa...

The results of the analysis state humus in virgin light gray forest soils south Tyumen region are presented. A total 96 full profile sections were made and described, soil samples taken for laboratory studies. processed MS Excel using Descriptive Statistics tool. It was revealed that subtype has a low content upper part - 2.07±0.47 %. sharp decrease down established. In A1A2 horizon, average sa...

1 2 Relationships between anecic earthworms (Lumbricus terrestris and Aporrectodea 3 giardi) and the collembolan species Heteromurus nitidus (Templeton, 1835), which is known 4 to be attracted to earthworms, were investigated in an 8-week laboratory experiment. Our 5 aims were (1) to assess whether earthworms influence the population dynamics of H. nitidus, 6 and (2) to study pathways of influe...

The article is structured in six sections. A first section is dedicated to the state of the art concerning climatic change and agriculture. Internet-available IPCC maps and cartographic documents made by scientific research centres were used for illustrating forecasted climatic changes. In sections 2 and 3, bibliographic evidences were collected for supporting a vegetation and soil co-evolution...

The size, especially the root size, of advance oak (Quercus spp.) reproduction provides the best indication of the growth potential afer release or top-kill. This study examined the relationship between the size of the root system and various diameterheight measurements for small (<60 cm) white oak (Q. alba L.) seedlings. Diameters measured at the top of the litter and humus luyers and at the r...

This paper aims to characterize the evolution of organic matter during the composting of municipal solid waste (MSW). During the 46-day composting process, six samples with different composting time were collected from Songjiang Solid Waste Biological Treatment Plant in Shanghai, China. Dissolved organic matter (DOM) was extracted by ultra-pure water, and the UV-Visible (UV-Vis) spectra of DOM ...