Discover the most talked about and latest scientific content & concepts.

Concept: Simple module


BACKGROUND: Prior studies have suggested that patients with workers' compensation (WC) related injuries have less successful postsurgical outcomes compared to the general population. The purpose of this study was to determine the functional outcome and return to work for WC patients who have undergone distal biceps tendon repair (DBTR). A group of patients without a WC claim (non-WC) served as a control. METHODS: From July 2002 to December 2009, 60 WC patients and 63 non-WC patients who underwent unilateral, acute (<6 weeks) DBTR and had a minimum of 12 months of postoperative follow-up were contacted. Data pertaining to patient age, sex, handedness, smoking status, occupation, time to return to work, and ability to return to original occupation were obtained. Functional outcomes were primarily assessed with the DASH, DASH-Work Module, and DASH Sports/Performance Arts Module questionnaires. Outcomes in the WC group were compared to the non-WC group. RESULTS: Average length of follow-up was 3.55 years (range, 1.5-8.9) in the WC group and 3.64 years (range, 2.2-8.0) in the non-WC group. Mean DASH, DASH-Work Module, and Sports/Performance Arts Module scores were significantly greater (poorer outcome) in the WC group than in the non-WC group. Average time to return to full duty was 3.95 months in the WC group and 1.35 months in the non-WC group. CONCLUSION: WC patients who underwent distal biceps tendon repair took longer to return to work and had worse DASH scores than non-WC patients.

Concepts: Vector space, Group, Outcome, Workers' compensation, Group action, Simple module


Darwin’s dynamical theory of X-ray diffraction is extended to the case of lateral (i.e., having a finite length in the lateral direction) crystalline structures. This approach allows one to calculate rocking curves as well as reciprocal-space maps for lateral crystalline structures having a rectangular cross section. Numerical modelling is performed for these structures with different lateral sizes. It is shown that the kinematical approximation is valid for thick crystalline structures having a small length in the lateral direction.

Concepts: DNA, Diffraction, X-ray, Crystallography, Mathematics, Fundamental physics concepts, X-ray crystallography, Simple module


The consistency of the frequency response predicted by a class of electrochemical impedance expressions is analytically checked by invoking the Kramers-Kronig (KK) relations. These expressions are obtained in the context of Poisson-Nernst-Planck usual or anomalous diffusional models that satisfy Poisson’s equation in a finite length situation. The theoretical results, besides being successful in interpreting experimental data, are also shown to obey the KK relations when these relations are modified accordingly.

Concepts: Scientific method, Data, Experiment, Hypothesis, Simple module