Polyphase Glacigenic Deformation of Advance Glaciofluvial Sediments, Near Big Creek, British Colombia

Deformation structures were observed in glaciofluvial sediments near Big Creek, central British Columbia. These sediments record a sequence of polyphase deformation resulting from the advance and retreat of the Late Wisconsinan (Fraser Glaciation) Cordilleran Ice Sheet. Deformation is attributed to ductile then brittle failure resulting from: (a) horizontal compression and loading as ice advanced over saturated sediments; followed by (b) lateral extension then (c) compression under frozen conditions during glacier overriding; and finally (d) vertical extension during unloading upon déglaciation. Most deformation (a-c, above) appears to have occurred during the advance phase of the Fraser Glaciation.Des structures de déformation ont été observées dans des sédiments fluvioglaciaires, près de Big Creek. Ces sédiments comprennent la séquence d'une déformation polyphasée résultant de l'avancée et du retrait de l'Inlandsis de la Cordillère (Glaciation de Fraser) au Wisconsinien supérieur. La déformation est attribuée à des fractures d'abord de type ductile, puis cassant résultant : (a) d'une compression et d'une charge horizontales à mesure que la glace avançait sur les sédiments saturés; suivie (b) d'une extension latérale, puis (c) d'une compression en milieu gelé pendant la phase de chevauchement glaciaire; et enfin (d) d'une extension verticale pendant la décharge au moment de la déglaciation. La plus grande partie de la déformation (a-c) s'est produite au cours de la phase d'avancée de la Glaciation de Fraser.Nahe bei Big Creek im Zentrum von British Columbia hat man Verformungsstrukturen in fluvioglazialen Sedimenten beobachtet. Diese Sedimente belegen eine Sequenz mehrphasiger Verformung, welche durch den VorstoB und Rùckzug der Kordilleren-Eisdecke im spaten Wisconsin (Fraser-Vereisung) verursacht wurde. Die Verformung fuhrt man auf zunàchst geschmeidiges, dann sprodes Nachgeben zuruck, veranlaRt durch: (a) horizontale Verdichtung und Anhâufung wàhrend das Eis uber die saturierten Sedimente vordrang, darauf folgend (b) eine latérale Ausdehnung und dann (c) Verdichtung in vereistem Milieu wàhrend der Gletscherûberschiebung, und schlie&lich (d) vertikale Ausdehnung wàhrend der durch die Enteisung bewirkten Stromungen. Der grôRte TeN der Verformung (siehe a-c oben) scheint wàhrend der VorstoRphase der Fraser-Vereisung geschehen zu sein

Ambipolar Nernst effect in NbSe2_2

The first study of Nernst effect in NbSe$_2$ reveals a large quasi-particle contribution with a magnitude comparable and a sign opposite to the vortex signal. Comparing the effect of the Charge Density Wave(CDW) transition on Hall and Nernst coefficients, we argue that this large Nernst signal originates from the thermally-induced counterflow of electrons and holes and indicates a drastic change in the electron scattering rate in the CDW state. The results provide new input for the debate on the origin of the anomalous Nernst signal in high-T$_c$ cuprates.Comment: 5 pages including 4 figure

SNAP-8 corrosion program Quarterly progress report, period ending 31 May 1965

Differences in corrosion and mass transfer rates in corrosion loops for SNAP-8 system and effectiveness of cold trapping in reducing hydrogen concentratio

Snap-8 corrosion program quarterly progress report, period ending 28 feb. 1965

SNAP-8 corrosion program - hydrogen solubility in sodium-potassium, permeability of hydrogen and deuterum through stainless steel, and phase equilibri

Algal food and fuel coproduction can mitigate greenhouse gas emissions while improving land and water-use efficiency

The goals of ensuring energy, water, food, and climate security can often conflict.Microalgae (algae) are being pursued as a feedstockfor both food and fuels—primarily due to algae’s high areal yield and ability to grow on non-arable land, thus avoiding common bioenergy-food tradeoffs. However, algal cultivation requires significant energy inputs that may limit potential emission reductions.We examine the tradeoffs associated with producing fuel andfood from algae at the energy–food–water–climate nexus.We use the GCAM integrated assessment model to demonstrate that algalfood production can promote reductions in land-use change emissions through the offset of conventional agriculture. However,fuel production, either via co-production of algal food and fuel or complete biomass conversion to fuel, is necessary to ensure long-term emission reductions, due to the high energy costs of cultivation. Cultivation of salt– water algae for food products may lead to substantial freshwater savings; but, nutrients for algae cultivation will need to be sourced from waste streams to ensure sustainability. By reducing the land demand of food production, while simultaneously enhancingfood and energy security, algae can further enable the development of terrestrial bioenergy technologies including those utilizing carbon capture and storage. Our results demonstrate that large-scale algae research and commercialization efforts should focus on developing both food and energy products to achieve environmental goals.https://iopscience.iop.org/article/10.1088/1748-9326/11/11/114006/metaPublished versio

Hadronic Annihilation Decay Rates of P-wave Heavy Quarkonia with Both Relativistic and QCD Radiative Corrections

Hadronic annihilation decay rates of P-wave heavy quarkonia are given to next-to-leading order in both $\alpha_s$ and $v^2$. They include ten nonperturbative parameters, which can be rigorously defined as the matrix elements of color-singlet and color-octet operators in NRQCD. We expect these papameters will be determined from lattice calculations in future.Comment: 5 Pages RevTex. The paper is withdraw

Large Possible retardation effects of quark confinement on the meson spectrum II

We present the results of a study of heavy-light-quark bound states in the context of the reduced Bethe-Salpeter equation with relativistic vector and scalar interactions. We find that satisfactory fits may also be obtained when the retarded effect of the quark-antiquark interaction is concerned.Comment: 11 pages, RevTex, to appear in PR

Possible retardation effects of quark confinement on the meson spectrum

The reduced Bethe-Salpeter equation with scalar confinement and vector gluon exchange is applied to quark-antiquark bound states. The so called intrinsic flaw of Salpeter equation with static scalar confinement is investigated. The notorious problem of narrow level spacings is found to be remedied by taking into consideration the retardation effect of scalar confinement. Good fit for the mass spectrum of both heavy and light quarkomium states is then obtained.Comment: 14 pages in LaTex for

Marine microalgae commercial production improves sustainability of global fisheries and aquaculture

publishedVersio

Repetitive elements in parasitic protozoa

A recent paper published in BMC Genomics suggests that retrotransposition may be active in the human gut parasite Entamoeba histolytica. This adds to our knowledge of the various types of repetitive elements in parasitic protists and the potential influence of such elements on pathogenicity