The ocean and atmosphere were largely anoxic in the early Precambrian, resulting in an Fe cycle that was dramatically different than today’s. Extremely Fe-rich sedimentary deposits—i.e., Fe formations—are the most conspicuous manifestation of this distinct Fe cycle. Rare Earth Element (REE) systematics have long been used as a tool to understand the origin of Fe formations and the corresponding...

The present study examines the different ways in which language structure marks individuation and cue early attention in a novel noun generalization task. Results in the present study extends the Boundary Shift Hypothesis, suggesting that the linguistic boundary between individuals and nonindividuals influences the perceptual boundaries and the correlational patterns formed overtime between ont...

We consider flocks of artificial birds and study the emergence of V-like formations during flight. We introduce a small set of fully distributed positioning rules to guide the birds' movements and demonstrate, by means of simulations, that they tend to lead to stabilization into several of the well-known V-like formations that have been observed in nature. We also provide quantitative indicator...

The rapid growth in natural gas consumption has increased the need for gas storage, in particular in the form of injection into depleted reservoirs. Also, CO2 sequestration into the depleted reservoirs has attracted a large attention recently. However, it is important to ensure that the injection pressure is maintained below a certain limit to avoid unsealing the cap rock or reactivation of any...

using of different systems of soil plough after changing unconsciously and non-scientific of land use, other soil physical and chemical characteristics affected. this fact, especially in marginal lands and mountainous regions is more visible. this research compared with the purpose of studying land use changing on some soil physical and chemical characters like very tiny sand percent, ph, ec, c...

The Jura-Cretaceous coal seams of the Currier, Mist Mountain, &thing and Gates formations generally formed in delta or strand plain environments with little marine influence. The sulphur contents of coal from these formations is therefore generally low, nearly always less than I % and often less than 0.5 %. Coalbearing formations of the Cretaceous Nanaimo and Skeena groups were deposited in coa...

Potensi keindahan alam Sumatera Barat merupakan salah satu sumber pendapatan daerah dan masyarakat sekitar. Untuk mengelola potensi tersebut dibutuhkan kelompok sadar wisata (Pokdarwis) yang tangguh, kreatif solid. Tujuan kegiatan pengabdian ini adalah untuk membantu meningkatkan pemahaman kepariwisataa tata kelola manajemen administrasi Pokdarwis Bukit Matoa. Metode digunakan dalam pelaksanaan...