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Träfflista för sökning "WFRF:(van Driel Jan H.) "

Sökning: WFRF:(van Driel Jan H.)

  • Resultat 1-3 av 3
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1.
  • Acharya, B. S., et al. (författare)
  • Introducing the CTA concept
  • 2013
  • Ingår i: Astroparticle physics. - : Elsevier BV. - 0927-6505 .- 1873-2852. ; 43, s. 3-18
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories. An international collaboration has formed with more than 1000 members from 27 countries in Europe, Asia, Africa and North and South America. In 2010 the CTA Consortium completed a Design Study and started a three-year Preparatory Phase which leads to production readiness of CTA in 2014. In this paper we introduce the science goals and the concept of CTA, and provide an overview of the project. (C) 2013 Elsevier B.V. All rights reserved.
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2.
  • Arnlund, David, et al. (författare)
  • Visualizing a protein quake with time-resolved X-ray scattering at a free-electron laser
  • 2014
  • Ingår i: Nature Methods. - : Springer Science and Business Media LLC. - 1548-7091 .- 1548-7105. ; 11:9, s. 923-926
  • Tidskriftsartikel (refereegranskat)abstract
    • We describe a method to measure ultrafast protein structural changes using time-resolved wide-angle X-ray scattering at an X-ray free-electron laser. We demonstrated this approach using multiphoton excitation of the Blastochloris viridis photosynthetic reaction center, observing an ultrafast global conformational change that arises within picoseconds and precedes the propagation of heat through the protein. This provides direct structural evidence for a 'protein quake': the hypothesis that proteins rapidly dissipate energy through quake-like structural motions.
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3.
  • Nilsson, Pernilla, 1969-, et al. (författare)
  • How will we understand what we teach? : Primary student teachers´ perceptions of how to develop subject matter knowledge and a positive attitude towards physics
  • 2009
  • Konferensbidrag (refereegranskat)abstract
    • It is well known that many primary teachers have a negative attitude towards science as well as limited science subject matter knowledge. During a course, 40 primary science student teachers were video recorded to follow their activities during practical experiments in physics. After every workshop, they watched the video in order to reflect on their activities and communication in the group. After the course a questionnaire including a storyline was used to elicit the student teachers´ perceptions of their development of subject matter knowledge during the course. Finally, five participants were interviewed. The results give an insight into factors that primary student teachers described as important to develop subject matter knowledge and a more positive attitude towards physics.
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  • Resultat 1-3 av 3

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