11 Matching Annotations
  1. Last 7 days
  2. Sep 2020
  3. Aug 2020
  4. Jul 2020
  5. May 2020
  6. Jan 2020
  7. May 2019
    1. La stratégie de communication de la NASA concernant la trace de pas4 laissée sur la lune nous a paru, malgré (ou à cause de) sa triviali-té5, intéressante à analyser pour évoquer le rapport entre l’intentionnalité6 de la trace et son interprétation. Le fait que ces tra-ces intentionnelles soient comprises implique certains attendus que nous présentons rapidement pour rappeler l’indexation7 de la signifi-cation et introduire certains chapitres. Dans le même objectif, consi-dérant que nous n’avons pas accès à la trace elle-même (la trace du pas de l’homme sur la lune) mais à la trace de trace (les images de l’événement), l’intention affichée de la trace laissée pour le futur dis-simule de fait l’intention de la mise en visibilité d’une trace pour le

      Il s'agit là d'une trace intentionnelle, qui semble s'opposer au caractère normalement involontaire de la trace.

  8. Aug 2018
    1. Contrary to paper notes, computer files do not display the traces or versions that led to their final state.

      This seems weirdly overstated. How do paper notes maintain versions and traces? Electronic documents contain rich sources of meta data for trace analysis, as well as various options to explicitly demonstrate temporal order and change through formatting.

  9. May 2017
    1. heat trace (heating cable)
      Heat trace or heating cable is used to warm or heat underground structures, storage tanks, vessels, and instrumentation in order to maintain a specified temperature or eliminate the possibility of freezing. Heat trace or heating cable accomplish this task by adding the amount of heat energy to the process fluid that is lost from the process fluid. It is desirable to maintain a certain temperature since higher temperatures reduce viscosity, enhance combustion, and prevent freezing or crystallization of the fluid. Within the oil and gas industry, elevated temperatures are required to separate the crude oil or raw natural gas to the surface and freeze protection is required to allow refining and distribution of the fluid (Thermon South Africa (Pty.) Ltd. ). Heat trace or heating cable often utilizes resistance wire to provide a medium for voltage to pass through. Due to the resistance of the wire, the heat trace or heating cable becomes warmer and is able to use this heat to warm the underground structures that it surrounds. One material used in resistance wires is nickel-chromium (Peterjohn, Melillo, Bowles, & Steudler, 1993). Heat trace has been used since the early 1900s to ensure the proper flow of petroleum, tar, and wax through pipelines. Since then, certain products within the petroleum and chemical industries needed to be kept between specific temperatures to ensure their quality. Today, the most commonly used heat trace medium is steam (Thermon South Africa (Pty.) Ltd. ). 
      

      References

      Peterjohn, W. T., Melillo, J. M., Bowles, F. P., & Steudler, P. A. (1993). Soil Warming and Trace Gas Fluxes: Experimental Design and Preliminary Flux Results. Oecologia, 18-24.

      Thermon South Africa (Pty.) Ltd. . (n.d.). Heat Tracing Technologies. Retrieved from Thermon South Africa (Pty.) Ltd. : file:///H:/Users/rrs020.BUCKNELL.000/Downloads/thermon-sa_heat-trace-technologies_energy-savings.pdf