Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams.

Plasma photocathode wakefield acceleration combines energy gains of tens of GeV m with generation of ultralow emittance electron bunches, and opens a path towards 5D-brightness orders of magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks and advanced light sources. However, an intrinsic by-product of the enormous electric field gradients inherent to plasma accelerators is substantial correlated energy spread-an obstacle for key applications such as free-electron-lasers.

Resistance and balance training improves functional capacity in very old participants attending cardiac rehabilitation after coronary bypass surgery.

Objectives: To compare the efficacy of intensive functional exercise training with that of usual cardiac rehabilitation (CR) in very old adults soon after coronary bypass surgery (CABG).

Design: Randomized controlled trial.

Setting: In-hospital CR.

[Animal experiments on the etiology and histogenesis of colonic carcinoma].

The influence of nutrition upon the etiology and histogenesis of dimethylhydrazine induced carcinomas of the colon was studied in rats. A double-way Anus praeter was made in one-half of the animals (393/823). Histological and statistical analysis of more than 7000 organ preparations yielded the following results: (1) The intestinal contents has effects on localization, latency, and frequency of the colonic tumour.