146 research outputs found
Comparative study of time-resolved K-shell spectra from aluminum plasmas generated by ultrashort laser pulses at 395 and 790 nm
No full textA comparative study of temporally and spectrally resolved K- shell emission from aluminum targets heated with 150 fs Ti:sapphire laser pulses at 790 and 395 nm is presented at an intensity of 5x1017 W/cm2. Whereas at 395 nm spectrally broad intense plasma lines and a weak K α line with durations (full width at half maximum) of 1-2 ps are observed, the spectrum at 790 nm shows weak narrow plasma lines and an intense K α line with durations of 3-5 ps. (C) 2002 American Institute of Physics
High resolution microscopy techniques for the analysis of biological samples: a comparison
No full textPerformances and advantages of different high-resolution microscopy techniques are compared. These include Soft X-ray Contact Microscopy (SXCM), Atomic Force Microscopy (AFM), Focused Ion Beam (FIB) and Transmission Electron Microscopy (TEM). It is shown that they allow complementary approaches to imaging of biological objects. These techniques have been used to image the same type of cells (Saccharomyces cerevisiae) thus providing a common benchmark. In particular it is shown that the novel FIB technique allows easy target cell selection, fast operation, high resolution, 3D imaging and sample manipulation during imaging
Fibromyalgia syndrome. General principles and coordination of clinical care and patient education
No full textThe scheduled update to the German S3 guidelines on fibromyalgia syndrome (FMS) by the Association of the Scientific Medical Societies ("Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften", AWMF; registration number 041/004) was planned starting in March 2011. The development of the guidelines was coordinated by the German Interdisciplinary Association for Pain Therapy ("Deutsche Interdisziplinaren Vereinigung fur Schmerztherapie", DIVS), 9 scientific medical societies and 2 patient self-help organizations. Eight working groups with a total of 50 members were evenly balanced in terms of gender, medical field, potential conflicts of interest and hierarchical position in the medical and scientific fields. Literature searches were performed using the Medline, PsycInfo, Scopus and Cochrane Library databases (until December 2010). The grading of the strength of the evidence followed the scheme of the Oxford Centre for Evidence-Based Medicine. The formulation and grading of recommendations was accomplished using a multi-step, formal consensus process. The guidelines were reviewed by the boards of the participating scientific medical societies. A diagnosis of FMS should be explicitly communicated with the afflicted individual. A step-wise treatment, depending on the severity of FMS and the responses to therapeutic measures, is recommended. Therapy should only be continued if the positive effects outweigh the side effects. The English full-text version of this article is available at SpringerLink (under "Supplemental")
Demonstration of aluminum K-shell line shifts in isochorically heated targets driven by ultrashort laser pulses
No full textTargets consisting of 25 nm Al layers buried in solid carbon at depths of up to 400 nm have been irradiated with frequency doubled Ti:sapphire laser pulses of 150 fs duration at an intensity of a few 1017 W/cm2. The analysis of the emitted Al K-shell spectra yields densities close to that of solid Al and temperatures around 500 eV. By using the cold Si Kα line for wavelength calibration, the presence of a red dense- plasma line shift for several K-shell resonance and associated satellite lines is clearly demonstrated
Calculation of Free-Free Radiation from Plasmas with Non-Maxwellian Isotropic or Anisotropic Electron Velocity Distribution
No full textCalculation of free-free radiation from plasma with non-Maxwellian isotropic or anisotropic electron velocity distribution
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Comparative study of time-resolved K-shell spectra from aluminum plasmas generated by ultrashort laser pulses at 395 and 790 nm
No full textA comparative study of temporally and spectrally resolved K- shell emission from aluminum targets heated with 150 fs Ti:sapphire laser pulses at 790 and 395 nm is presented at an intensity of 5x1017 W/cm2. Whereas at 395 nm spectrally broad intense plasma lines and a weak K α line with durations (full width at half maximum) of 1-2 ps are observed, the spectrum at 790 nm shows weak narrow plasma lines and an intense K α line with durations of 3-5 ps. (C) 2002 American Institute of Physics
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