1. |
|
|
2. |
- Ravasio, A, et al.
(författare)
-
Single-Shot Diffractive Imaging with a Table-Top Femtosecond Soft X-Ray Laser-Harmonics Source
- 2009
-
Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 103:2, s. 028104-
-
Tidskriftsartikel (refereegranskat)abstract
- Coherent x-ray diffractive imaging is a powerful method for studies on nonperiodic structures on the nanoscale. Access to femtosecond dynamics in major physical, chemical, and biological processes requires single-shot diffraction data. Up to now, this has been limited to intense coherent pulses from a free electron laser. Here we show that laser-driven ultrashort x-ray sources offer a comparatively inexpensive alternative. We present measurements of single-shot diffraction patterns from isolated nano-objects with a single 20 fs pulse from a table-top high-harmonic x-ray laser. Images were reconstructed with a resolution of 119 nm from the single shot and 62 nm from multiple shots.
|
|
3. |
- Carré, B., et al.
(författare)
-
Characterization of attosecond pulse trains
- 2007
-
Ingår i: Ultrafast Optics V. - New York, NY : Springer New York. - 1556-1534 .- 0342-4111. - 9780387491172 ; 132, s. 45-56
-
Konferensbidrag (refereegranskat)abstract
- Ultrashort light pulses, as short as 100 as, can be produced from high harmonic generation (HHG) in an atomic gas medium. This major achievement of the last 6 years in high field physics has now been demonstrated in different conditions of medium-field interaction [1].
|
|
4. |
- Carré, Helena, 1979-, et al.
(författare)
-
Improved contact tracing for Chlamydia trachomatis with experienced tracers, tracing for one year back in time and interviewing by phone in remote areas
- 2008
-
Ingår i: Sexually Transmitted Infections. - : BMJ publishing. - 1368-4973 .- 1472-3263. ; 84:3, s. 239-242
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives: To evaluate the Swedish model for contact tracing and especiallythe "Västerbotten model" with centralised, extended contactinterview periods, sometimes by telephone.Methods: Using questionnaires, the contact tracing and interview procedurewas evaluated during 2002, followed by an evaluation of contactinterviewing by phone in 2005–6.Results: Patients with diagnosed Chlamydia trachomatis infection reportedon average 2.5 sexual contacts, 3.0 contacts when contact interviewingwas performed at the clinic, and 2.3 contacts when performedby phone. 65% of the sexual contacts with a known test resultwere infected.Conclusion: Centralised contact tracing, exploring the sexual history forat least 12 months back in time, shows good results. Combinedwith screening of certain risk groups it is probably one effectiveway of preventing C trachomatis infections. Preventing C trachomatisby primary prevention such as information and counselling is,however, still of great importance.
|
|
5. |
|
|