Charge Transport Through Open, Driven Two-Level Systems with Dissipation

We derive a Floquet-like formalism to calculate the stationary average current through an AC driven double quantum dot in presence of dissipation. The method allows us to take into account arbitrary coupling strengths both of a time-dependent field and a bosonic environment. We numerical evaluate a truncation scheme and compare with analytical, perturbative results such as the Tien-Gordon formula.Comment: 14 pages, 6 figures. To appear in Phys. Rev.

The Future of Rheumatoid Arthritis and Hand Surgery - Combining Evolutionary Pharmacology and Surgical Technique

Rheumatoid arthritis is a systemic autoimmune disease of uncertain aetiology, which is characterized primarily by synovial inflammation with secondary skeletal destructions

Papillon-Lefèvre Syndrome

A patient, with Papillon-Lefèvre syndrome, presented with a premature loss of both deciduous and permanent teeth and hyperkeratosis palmaris et plantaris. Other abnormalities such as psoriasiform hyperkeratosis, calcification of the falx, and frequent infections can be seen. Although no etiologic factor is known for this aberration, an autosomal recessive inheritance is established. Treatment usually consists of dental hygiene only since dermatologic therapy is usually unrewarding. A new finding resulted when fibroblasts from involved gingiva were compared with either uninvolved gingiva or controlled gingiva. The protein and collagen synthesis of the involved tissue was about twice that of the latter two groups

Final report of key comparison CCM.P-K12 for very low helium flow rates (leak rates)

Quantitative leak tests with vacuum technology have become an important tool in industry for safety and operational reasons and to meet environmental regulations. In lack of a relevant key comparison, so far, there are no calibration measurement capabilities published in the BIPM data base. To enable national metrology institutes providing service for leak rate calibrations to apply for these entries in the data base and to ensure international equivalence in this field, key comparison CCM.P-K12 was organised. The goal of this comparison was to compare the national calibration standards and procedures for helium leak rates. Two helium permeation leak elements of 4×10-11 mol/s (L1) and 8×10-14 mol/s (L2) served as transfer standards and were measured by 11 national metrology institutes for L1 and 6 national metrology institutes for L2. Equivalence could be shown for 8 laboratories in the case of L1 and for all 6 in the case of L2. Three different evaluation methods were applied and are presented in this report, but the random effects model was accepted as most suitable in our case