[Reduction in the noise pollution within residential environments - what has been achieved so far?] / Verringerung der Lärmbelastungen am Wohnort ­ Was wurde bisher erreicht?

Surveys show that noise in its various forms is among the most severe environmental burdens. According to estimates of the World Health Organization (WHO), there is a loss of one million healthy life years per year in Europe due to the effects of environmental noise. This paper discusses the harmful effects of noise with the example of traffic noise, for which the highest number of environmental noise effect studies are available. An increasing number of studies show associations between traffic noise and vascular, metabolic and psychic diseases. Too little is still known about the causal mechanisms, even though a number of explanatory models are available. However, it is clear that today it is no longer a question of whether noise is responsible for extra-aural diseases, but under what conditions and to what extent are the risks.The high degree of noise nuisance shows that more action is needed with regard to noise control policy.Over the past few years, federal, regional and local governments have taken countless initiatives on traffic noise control - for instance, within the framework of action plans. Especially notable are the innovative measures, instruments and programs regarding railway noise. In the most important source of nuisance, road traffic noise, less progress has been made. In air traffic noise, too, the revision and development of important laws are still lacking. To promote inner urban development, the level of protection against industrial and sports noise has been reduced.Significant health-related reductions in noise pollution (except regarding the railways), therefore, cannot be expected in the near future.

Optical Trapping of Gold Nanoparticles in Air.

Most progress on optical nanoparticle control has been in liquids, while optical control in air has proven more challenging. By utilizing an air chamber designed to have a minimum of turbulence and a single laser beam with a minimum of aberration, we trapped individual 200 to 80 nm gold nanoparticles in air and quantified the corresponding trapping strengths. These results pave the way for construction of metallic nanostructures in air away from surfaces.

Information-to-work conversion in single-molecule experiments: From discrete to continuous feedback.

We theoretically investigate the extractable work in single molecule unfolding-folding experiments with applied feedback. Using a simple two-state model, we obtain a description of the full work distribution from discrete to continuous feedback. The effect of the feedback is captured by a detailed fluctuation theorem, accounting for the information aquired. We find analytical expressions for the average work extraction as well as an experimentally measurable bound thereof, which becomes tight in the continuous feedback limit. We further determine the parameters for maximal power or rate of work extraction. Although our two-state model only depends on a single effective transition rate, we find qualitative agreement with Monte Carlo simulations of DNA hairpin unfolding-folding dynamics.

Dissociative symptoms in schizophrenia: a comparative analysis of patients with borderline personality disorder and healthy controls.

The aim of this study was to investigate the occurrence of dissociative symptoms in patients with a schizophrenic disorder. The pattern of dissociative experiences was examined in a group of patients with a diagnosis of the schizophrenia spectrum disorder (n = 26; mean age 27.9 years), and a group of patients with a diagnosis of borderline personality disorder (n = 26; mean age 24.0 years) was compared with normal controls of the general population (n = 1,056; mean age 18.7 years). The degree of self-reported dissociative symptoms was measured using the German version of the Dissociative Experiences Scales. The dissociation scores were significantly higher among patients with a diagnosis of borderline personality disorder compared to the group of schizophrenic patients and to the control group. There was no difference in the degree of reported dissociative experiences between the group of schizophrenic patients and the normal volunteers. An analysis of the subdimensions (dissociative amnesia, absorption/imaginative involvement, depersonalization/derealization) of the scale revealed the same strong distinctions between the investigated groups. There was no evidence that dissociative symptoms reflect a specific vulnerability in young schizophrenic patients.