3,302 research outputs found

    Investigation of environmental effects on coatings for thermal control

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    Accomplishments made during study of coatings are reported. Development of structure/property theory for selecting most appropriate pigments for space vehicle paints is discussed along with improvements made in zinc-oxide pigmented potassium silicate paint

    Asymmetries of Heavy Elements in the Young Supernova Remnant Cassiopeia A

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    Supernova remnants (SNRs) offer the means to study supernovae (SNe) long after the original explosion and can provide a unique insight into the mechanism that governs these energetic events. In this work, we examine the morphologies of X-ray emission from different elements found in the youngest known core-collapse (CC) SNR in the Milky Way, Cassiopeia A. The heaviest elements exhibit the highest levels of asymmetry, which we relate to the burning process that created the elements and their proximity to the center of explosion. Our findings support recent model predictions that the material closest to the source of explosion will reflect the asymmetries inherent to the SN mechanism. Additionally, we find that the heaviest elements are moving more directly opposed to the neutron star (NS) than the lighter elements. This result is consistent with NS kicks arising from ejecta asymmetries.Comment: 12 pages, 4 figures, 2 tables Updated to include an analysis of Emission Measure Maps (vs the, still-included, continuum-subtracted flux maps), used as another proxy for mass maps. The results have not changed; the emission measure maps also show increasing asymmetry with ejecta mass. (Now matches the version published in ApJ. Vol 889 Issue 2 (2020) 144

    Understanding Technological Responses of Industrial Firms to Environmental Problems: Implications for Government Policy (chapter)

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    Technological change is now generally regarded as essential in achieving the next major advances in pollution reduction. The necessary technologi-cal changes must include: (1) the substitution of materials used as inputs, (2) process redesign, and (3) final product reformulation. Initiatives for focusing on technological change must address multimedia pollution and reflect fundamental shifts in the design of products and processes. Distin-guished from end-of-pipe pollution control, those new initiatives are kluown as pollution prevention, source reduction, taxics use reduction, or clean technology (OECD 1987). The practices of in-process recycling and equip-ment modification are sometimes also included in the approach. The term waste reduction is also used, but it appears to be less precise and may not include air or water emissions. Pollution prevention has also been dis-cussed as a preferred way for achieving sustainable development, giving rise to the term sustainable technology (Heaton et al. 1991). This chapter argues that the key to success in pollution prevention is to influence managerial knowledge of and managerial attitudes toward both technological change and environmental concerns. Encouraging techno-logical changes for production purposes (i.e., main business innovation) and for environmental compliance purposes must be seen as interrelated

    Innovation- The Pathway to Threefold Sustainability

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    The purposes of this chapter is to delve more deeply into the processes and determinants of technological, organisational, and social innovation and to discuss the instruments and policies to stimulate the kinds of innovation necessary for the transformation of industrial societies into sustainable ones. Again, here we emphasise the attainment of ‘triple sustainability’ – improvements in competitiveness/long-term dynamic efficiency, social cohesion, and environment (including both resource productivity and environmental pollution) – which are the cornerstones of the real wealth of people

    Koncepcja binary approach jako instrument kształtowania zrównoważonego wzrostu

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    This article focuses on the binary economic approach and explains how this approach can enhance not only their capital earning capacity but also their demand for employment and the prospect for achieving environmental sustainability. The binary economic approach envisions an implementation of an ownership-broadening system of corporate finance that world require no taxes, redistribution, or government command. Corporations would be free to continue to meet their capital requirements as before, but they would have an additional, potentially more profitable, market means to do so.Niniejszy artykuł skupia się na podejściu charakterystycznym dla ekonomii binarnej i wyjaśnia, w jaki sposób koncepcja ta może przyczynić się nie tylko do zwiększenia ich zdolności zarabiania kapitału, ale również do zwiększenia popytu na zatrudnienie oraz perspektyw osiągnięcia równowagi środowiskowej. Koncepcja ekonomii binarnej (ang. binary approach) proponuje wdrożenie systemu pozwalającego na rozszerzenie systemu własności finansów korporacyjnych, który byłby wolny od podatków, redystrybucji czy ingerencji państwa. Przedsiębiorstwa miałyby prawo do pozyskiwania źródeł finansowania swoich potrzeb tak, jak to robiły dotychczas, ale dysponowałyby jeszcze dodatkowymi, potencjalnie bardziej rentownymi instrumentami rynkowymi umożliwiającymi im takie działanie
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