10,045 research outputs found
Investigating Implemented Process Design: A Case Study on the Impact of Process-aware Information Systems on Core Job Dimensions
Adequate process design particularly means that a process fulfills its stakeholders’ expectations. However, when designing process-aware information systems (PAIS), one stakeholder and his expectations are often neglected: the end user. Frequently, this results in end user fears, which, in turn, lead to emotional resistance and a lack of user support during process and information system design. In order to overcome this vicious circle it becomes necessary to better understand the impact of operationalized process design on the end users’ work profile. This paper presents the results of a case study at two Dutch companies.We investigate in which way employees perceive the impact of a newly introduced PAIS based on workflow management technology with respect to five job dimensions: skill variety, task identity, task significance, autonomy, and feedback from the job
Towards apparent convergence in asymptotically safe quantum gravity
The asymptotic safety scenario in gravity is accessed within the systematic
vertex expansion scheme for functional renormalisation group flows put forward
in \cite{Christiansen:2012rx,Christiansen:2014raa}, and implemented in
\cite{Christiansen:2015rva} for propagators and three-point functions. In the
present work this expansion scheme is extended to the dynamical graviton
four-point function. For the first time, this provides us with a closed flow
equation for the graviton propagator: all vertices and propagators involved are
computed from their own flows.
In terms of a covariant operator expansion the current approximation gives
access to , , as well as and higher derivative
operators. We find a UV fixed point with three attractive and two repulsive
directions, thus confirming previous studies on the relevance of the first
three operators. In the infrared we find trajectories that correspond to
classical general relativity and further show non-classical behaviour in some
fluctuation couplings.
We also find signatures for the apparent convergence of the systematic vertex
expansion. This opens a promising path towards establishing asymptotically safe
gravity in terms of apparent convergence.Comment: 24 pages, 6 figures; journal version with updated reference
Comparison of life history parameters for landed and discarded fish captured off the southeastern United States
Commercial fisheries that are managed with minimum size limits protect small fish of all ages and may affect size-selective mortality by the differential removal of fast growing fish. This differential removal may decrease the average size at age, maturation, or sexual transition of the exploited population. When fishery-independent data are
not available, a comparison of life history parameters of landed with those of discarded fish (by regulation) will
indicate if differential mortality is occurring with the capture of young but large fish (fast growing phenotypes).
Indications of this differential size-selective mortality would include the following: the discarded portion of the target fish would have similar age ranges but smaller sizes at age, maturation, and sexual transition as that of landed fish. We examined three species with minimum size limits but different exploitation histories. The known heavily exploited species (Rhomboplites aurorubens [vermilion snapper] and Pagrus pagrus [red porgy]) show signs of this
differential mortality. Their landed catch includes many young, large fish, whereas discarded fish had a similar age range and mean ages but smaller sizes at age than the landed
fish. The unknown exploited species, Mycteroperca phenax (scamp), showed no signs of differential mortality due
to size-selective fishing. Landed catch consisted of old, large fish and discarded scamp had little overlap in age ranges, had significantly different mean ages, and only small differences in size at age when compared to comparable
data for landed fish
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