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Träfflista för sökning "WFRF:(Biermann F.) srt2:(2012-2014)"

Sökning: WFRF:(Biermann F.) > (2012-2014)

  • Resultat 1-3 av 3
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1.
  • Mora, A., et al. (författare)
  • Gaia on-board metrology: basic angle and best focus
  • 2014
  • Ingår i: Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave. - : SPIE. - 1996-756X .- 0277-786X. ; 9143, s. 91430-91430
  • Konferensbidrag (refereegranskat)abstract
    • The Gala payload ensures maximum passive stability using a single material, SiC, for most of its elements. Dedicated metrology instruments are, however, required to carry out two functions: monitoring the basic angle and refocusing the telescope. Two interferometers fed by the same laser are used to measure the basic angle changes at the level of pas (prad, micropixel), which is the highest level ever achieved in space. Two ShackHartmann wavefront sensors, combined with an ad-hoc analysis of the scientific data are used to define and reach the overall best-focus. In this contribution, the systems, data analysis, procedures and performance achieved during commissioning are presented
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2.
  • Biermann, F., et al. (författare)
  • Navigating the Anthropocene: Improving Earth System Governance
  • 2012
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 335:6074, s. 1306-1307
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The United Nations conference in Rio de Janeiro in June is an important opportunity to improve the institutional framework for sustainable development.
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3.
  • Seitzinger, Sybil P., et al. (författare)
  • Planetary Stewardship in an Urbanizing World : Beyond City Limits
  • 2012
  • Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 41:8, s. 787-794
  • Tidskriftsartikel (refereegranskat)abstract
    • Cities are rapidly increasing in importance as a major factor shaping the Earth system, and therefore, must take corresponding responsibility. With currently over half the world's population, cities are supported by resources originating from primarily rural regions often located around the world far distant from the urban loci of use. The sustainability of a city can no longer be considered in isolation from the sustainability of human and natural resources it uses from proximal or distant regions, or the combined resource use and impacts of cities globally. The world's multiple and complex environmental and social challenges require interconnected solutions and coordinated governance approaches to planetary stewardship. We suggest that a key component of planetary stewardship is a global system of cities that develop sustainable processes and policies in concert with its non-urban areas. The potential for cities to cooperate as a system and with rural connectivity could increase their capacity to effect change and foster stewardship at the planetary scale and also increase their resource security.
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  • Resultat 1-3 av 3

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