Andreas Müller

Bio: Andreas Müller is an academic researcher from University of Duisburg-Essen. The author has contributed to research in topics: Psychological intervention & Job control. The author has an hindex of 26, co-authored 133 publications receiving 3649 citations. Previous affiliations of Andreas Müller include Dresden University of Technology & Leipzig University.

More than 75 percent decline over 27 years in total flying insect biomass in protected areas.

Abstract: Global declines in insects have sparked wide interest among scientists, politicians, and the general public. Loss of insect diversity and abundance is expected to provoke cascading effects on food webs and to jeopardize ecosystem services. Our understanding of the extent and underlying causes of this decline is based on the abundance of single species or taxonomic groups only, rather than changes in insect biomass which is more relevant for ecological functioning. Here, we used a standardized protocol to measure total insect biomass using Malaise traps, deployed over 27 years in 63 nature protection areas in Germany (96 unique location-year combinations) to infer on the status and trend of local entomofauna. Our analysis estimates a seasonal decline of 76%, and mid-summer decline of 82% in flying insect biomass over the 27 years of study. We show that this decline is apparent regardless of habitat type, while changes in weather, land use, and habitat characteristics cannot explain this overall decline. This yet unrecognized loss of insect biomass must be taken into account in evaluating declines in abundance of species depending on insects as a food source, and ecosystem functioning in the European landscape.

The Assessment of Psychological Strain in Work Contexts

Abstract: Irritation as defined in this paper is the subjectively perceived emotional and cognitive strain in occupational contexts. The structural equivalence of the Arabic, Dutch, English, French, Italian, Russian, Spanish, Turkish, and Polish adaptations of the German Irritation Scale is examined. The Irritation Scale is recommended for application particularly in occupational contexts. In this field it can be used for evaluating interventions, for research on stress at work, and for individual counseling. Exploratory factor analyses, as well as single group and different multiple-group confirmatory factor analyses, were performed. Structural equivalency in terms of equal factor loadings as well as equal factor covariances across all adaptations can be claimed. However, the single group analyses suggest that the hypothesized factor model should be rejected in the English, Russian, Spanish, and Turkish versions, mainly because of borderline values in the RMSEA index.

The association of workflow interruptions and hospital doctors' workload: a prospective observational study.

Abstract: Background: Subjective workload in healthcare employees is suspected to be important for the performance and safety of healthcare delivery. This study investigates associations between workflow interruptions and hospital doctors’ capability to manage their perceived workload in a safe and efficient manner. Aim: To examine the relationship of observed workflow interruptions with hospital doctors’ perceived workload during day clinical shifts. Methods: A prospective study of 43 full shift observations with 29 doctors working in internal medicine and surgical specialties. Workflow interruptions were assessed via observation using a previously validated observation instrument. Doctors assessed their workload twice throughout their day shift using three items of the validated NASA-Task Load Index (NASA-TLX; mental demands, effort, frustration). Results: Hospital doctors were on average disrupted 3.66 times per hour. Most frequent were interruptions by nursing staff, telephone/beeper interruptions and by fellow doctors. Senior doctors reported higher workload than their junior colleagues. Overall workflow interruptions were significantly related to doctors’ workload (b¼0.22; p¼0.03). Further analyses revealed that doctors’ workload was associated particularly with interruptions by nursing personnel (b¼0.23; p¼0.03). Conclusions: Frequent workflow interruptions may be linked with increased workload in doctors. Healthcare environments need to be better designed to reduce unnecessary interruptions and distractions so that hospital doctors can manage clinical work efficiently and safely.

Irritation - ein Instrument zur Erfassung psychischer Beanspruchung im Arbeitskontext. Skalen- und Itemparameter aus 15 Studien

Abstract: Zusammenfassung. Irritation beschreibt subjektiv wahrgenommene emotionale und kognitive Beanspruchungen im Kontext der Erwerbsarbeit. Anhand von 15 Studien (N = 4 030) werden Skalen- und Itemparameter der Irritations-Skala berichtet. Die Ergebnisse untermauern die branchenubergreifende Validitat und Reliabilitat der Skala. Erste Hinweise deuten darauf hin, dass Irritation schwerwiegenderen Befindensbeeintrachtigungen, wie depressiven Symptomen, vorgelagert ist. Neben einer Anwendung in der arbeitspsychologischen Stressforschung, kann das Instrument zur Beanspruchungsdiagnostik sowie zur Planung und Evaluation von Praventivmasnahmen innerhalb der betrieblichen Gesundheitsforderung empfohlen werden.

The moderating effects of job control and selection, optimization, and compensation strategies on the age-work ability relationship

Abstract: Summary Work ability describes employees’ capability to carry out their work with respect to physical and psychological job demands. This study investigated direct and interactive effects of age, job control, and the use of successful aging strategies called selection, optimization, and compensation (SOC) in predicting work ability. We assessed SOC strategies and job control by using employee self-reports, and we measured employees’ work ability using supervisor ratings. Data collected from 173 health-care employees showed that job control was positively associated with work ability. Additionally, we found a three-way interaction effect of age, job control, and use of SOC strategies on work ability. Specifically, the negative relationship between age and work ability was weakest for employees with high job control and high use of SOC strategies. These results suggest that the use of successful aging strategies and enhanced control at work are conducive to maintaining the work ability of aging employees. We discuss theoretical and practical implications regarding the beneficial roleoftheuseofSOCstrategiesutilizedbyolderemployeesandenhancedcontextualresourcesatworkforaging employees. Copyright © 2012 John Wiley & Sons, Ltd.

The Observation of Gravitational Waves from a Binary Black Hole Merger

Abstract: On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10(-21). It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203,000 years, equivalent to a significance greater than 5.1σ. The source lies at a luminosity distance of 410(-180)(+160) Mpc corresponding to a redshift z=0.09(-0.04)(+0.03). In the source frame, the initial black hole masses are 36(-4)(+5)M⊙ and 29(-4)(+4)M⊙, and the final black hole mass is 62(-4)(+4)M⊙, with 3.0(-0.5)(+0.5)M⊙c(2) radiated in gravitational waves. All uncertainties define 90% credible intervals. These observations demonstrate the existence of binary stellar-mass black hole systems. This is the first direct detection of gravitational waves and the first observation of a binary black hole merger.

Multiple Imputation for Nonresponse in Surveys

Abstract: 25. Multiple Imputation for Nonresponse in Surveys. By D. B. Rubin. ISBN 0 471 08705 X. Wiley, Chichester, 1987. 258 pp. £30.25.