Grinding as an approach to the production of high-strength, dispersion-strengthened nickel-base alloys

Mechanical process produces dispersion-strengthened metal alloys. Power surface contamination during milling is removed by a cleaning method that involves heating thin shapes or partially-compacted milled powder blends in hydrogen to carefully controlled temperature schedules

Production and processing of Cu-Cr-Nb alloys

A new Cu-based alloy possessing high strength, high conductivity, and good stability at elevated temperatures was recently produced. This paper details the melting of the master alloys, production of rapidly solidified ribbon, and processing of the ribbon to sheet by hot pressing and hot rolling

Antechamber facilitates loading and unloading of vacuum furnace

Antechamber facilitates the use of a furnace in which materials are heat treated in a high vacuum or a gas atmosphere. It has a high vacuum pumping system, a means for backfilling with a selected gas, an access door, glove ports, and a motor driven platform

Role of soil moisture versus recent climate change for the 2010 heat wave in western Russia

The severe 2010 heat wave in western Russia was found to be influenced by anthropogenic climate change. Additionally, soil moisture-temperature feedbacks were deemed important for the buildup of the exceptionally high temperatures. We quantify the relative role of both factors by applying the probabilistic event attribution framework and analyze ensemble simulations to distinguish the effect of climate change and the 2010 soil moisture conditions for annual maximum temperatures. The dry 2010 soil moisture alone has increased the risk of a severe heat wave in western Russia sixfold, while climate change from 1960 to 2000 has approximately tripled it. The combined effect of climate change and 2010 soil moisture yields a 13 times higher heat wave risk. We conclude that internal climate variability causing the dry 2010 soil moisture conditions formed a necessary basis for the extreme heat wave

Vacuum energy in the presence of a magnetic string with delta function profile

We present a calculation of the ground state energy of massive spinor fields and massive scalar fields in the background of an inhomogeneous magnetic string with potential given by a delta function. The zeta functional regularization is used and the lowest heat kernel coefficients are calculated. The rest of the analytical calculation adopts the Jost function formalism. In the numerical part of the work the renormalized vacuum energy as a function of the radius $R$ of the string is calculated and plotted for various values of the strength of the potential. The sign of the energy is found to change with the radius. For both scalar and spinor fields the renormalized energy shows no logarithmic behaviour in the limit $R\to 0$, as was expected from the vanishing of the heat kernel coefficient $A_2$, which is not zero for other types of profiles.Comment: 30 pages, 10 figure

"What does the university have to do with it?”: Perceptions of rape culture on campus and the role of university authorities

In April 2016, the #Endrapeculture protests spread across South African university campuses. These protests raised awareness of university policies regarding rape and sexual assault cases on campus. The protesters accused the university management of perpetuating a rape culture through policies which reinforced victim-blaming and protected perpetrators of sexual assault. Through the use of hashtag campaigns and public demonstrations, the movement quickly gained momentum across social and mainstream media. This momentum served to put pressure on university administrations to be accountable for cases of sexual assault on campuses. Movements calling out universities for perpetuating a rape culture are not unique to South Africa; as similar movements have been initiated at other university campuses across the globe. This article examines the rape culture discourse that emerged on Facebook following the #Endrapeculture protests. Specifically, we look at how people perceived rape culture and the role of university management in handling sexual assault. Naturalistic observation was used on comments from public posts and articles from Facebook relating to the 2016 #Endrapeculture protest. These comments were subjected to qualitative content analysis. Two main themes are discussed in this article: Rape/Rape Culture and The Role of Universities and Law Enforcement. Many commenters indicated that cases of rape and sexual assault should be addressed by law enforcement and should not be handled by university management. We argue that rape culture education should be formalised in South Africa

Effect of cell separation on gene expression and DNA methylation profiles in intestinal epithelial cells

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