Physician Burnout: The Making of a Crisis.

This essay places contemporary efforts to understand and respond to the crisis of physician burnout in historical perspective, proposing that the origins of such efforts lie in nineteenth century concerns over "nervous exhaustion," well before the term "physician burnout" was coined by social scientists in the early 1970s. Only very recently, however, have physician-scholars started to bring more sophisticated tools to bear in conceptualizing the problem, moving from a "systems approach" to the most recent efforts to frame the issue as a problem of corporate culture. The essay proposes that these different approaches to physician burnout illustrate the changing self-images of the medical profession over the last century and a half.

Quantitative analysis of the compliance of EU Sewage Sludge Directive by using the heavy metal concentrations from LUCAS topsoil database.

In the European Union (EU), a common understanding of the potential harmful effect of sewage sludge (SS) on the environment is regulated by the Sewage Sludge Directive 86/278/EEC (SSD). Limit values (LVs) for concentrations of heavy metals in soil are listed in Impact Assessment of this directive, and they were transposed by EU member states using different criteria. Member states adopted either single limit values or based on soil factors such as pH and texture to define the maximum limit values for concentrations of heavy metals in soils.

High-accuracy computation of hard X-ray focusing and imaging for refractive optics.

A mathematical apparatus for solving problems of X-ray wave propagation through complex optical systems, when the lens thickness can change with jumps, is developed and presented. The developed method is based on the use of the superposition of oriented Gaussian beams, which satisfy the Helmholtz equation with high accuracy. The wave propagation in air and through kinoform and ordinary lenses is considered.

Oriented Gaussian beams for high-accuracy computation with accuracy control of X-ray propagation through a multi-lens system.

A highly accurate method for calculating X-ray propagation is developed. Within this approach, the propagating wave is represented as a superposition of oriented Gaussian beams. The direction of wave propagation in each Gaussian beam agrees with the local direction of propagation of the X-ray wavefront.

A high-accuracy complex-phase method of simulating X-ray propagation through a multi-lens system.

The propagation of X-ray waves through an optical system consisting of many X-ray refractive lenses is considered. For solving the problem for an electromagnetic wave, a finite-difference method is applied. The error of simulation is analytically estimated and investigated.