| 1. |
- Freier, Christian, et al.
(författare)
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Mobile quantum gravity sensor with unprecedented stability
- 2016
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Ingår i: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 723:1, s. Art. no. 012050-
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Konferensbidrag (refereegranskat)abstract
- Changes of surface gravity on Earth are of great interest in geodesy, earth sciencesand natural resource exploration. They are indicative of Earth system's mass redistributions andvertical surface motion, and are usually measured with falling corner-cube- and superconductinggravimeters (FCCG and SCG). Here we report on absolute gravity measurements with amobile quantum gravimeter based on atom interferometry. The measurements were conductedin Germany and Sweden over periods of several days with simultaneous SCG and FCCGcomparisons. They show the best-reported performance of mobile atomic gravimeters todate with an accuracy of 39 nm/s^2, long-term stability of 0,5 nm/s^2 and short-term noise of 96 nm/s^2/(Hz)^1/2. These measurements highlight the unique properties of atomic sensors. Theachieved level of performance in a transportable instrument enables new applications in geodesyand related Fields, such as continuous absolute gravity monitoring with a single instrument underrough environmental conditions.
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| 2. |
- Glaser, Jürgen, et al.
(författare)
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Health-oriented work design interventions
- 2014
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Background/Aim: Current crisis of Western economies (e.g., growth, acceleration, work intensification) is reflected at an individual level in increasing health problems of work-forces (e.g., musculoskeletal problems, depression). In order to protect and improve work ability and health in organizations intervention strategies should reach beyond individual improvement of health behaviors and resilience and need to take into account more sustainable approaches of work design. We aim to advance knowledge and good practice of healthoriented work design interventions in different organizational contexts. All presented intervention studies are grounded in work psychological theories and concepts. Moreover, the evaluation designs are longitudinal and include intervention as well as control groups. All evaluations are based on well-established measures to assess psychosocial work characteristics as well as employee health.Content/Context: This symposium brings together applied interdisciplinary research of five institutions concerned with occupational health issues (I/O psychology, occupational and psychosomatic medicine) from three countries (Austria, Germany, Sweden). The research groups each have a long tradition in intervention research in different occupational settings. Six papers are proposed for presentations. Implications for research and practice: All presentations in this symposium will- provide evidence for changes in psychosocial work characteristics and employee health due to work design interventions- offer insights into intervention topics and processes in practice- discuss challenges, benefits and obstacles of health-oriented work design interventions.
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| 3. |
- Ott, Jürgen, et al.
(författare)
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Cm and mm Survey of Molecular Absorption Lines in Centaurus A
- 2012
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Ingår i: American Astronomical Society, AAS Meeting. ; 219, s. 349.26-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We present Australia Telescope Array data of molecular absorption lines toward the bright central core of Centaurus A. The line of sight crosses the prominent dust lane and continues through the disk and eventually through gas that may be very close to the central supermassive black hole. The goal of our the survey is to determine the physical conditions of the gas via analyses of molecular line tracers including molecular abundances and excitation that is sensitive to changes in temperature, density, ionization, and shocks. This study allows us to derive the physical conditions of every absorption line complex and finally let us assign the most likely environments. We present ATCA data in the 20-50GHz range at medium resolution of a few km/s and possibly ALMA data at 3mm and 1mm wavelengths. The project continues with sub-km/s higher spectral resolution for the most important lines in 2012.
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