Results 31 to 40 of about 220,925 (331)

The acute effects of working time patterns on fatigue and sleep quality using daily measurements of 6195 observations among 223 shift workers

open access: yesScandinavian Journal of Work, Environment & Health, 2021
OBJECTIVES: This study aimed to estimate acute effects of roster characteristics on fatigue and sleep quality and investigated whether these effects differed by individual characteristics.
Hardy A van de Ven   +5 more
doaj   +1 more source

Inferring black hole charge from backscattered electromagnetic radiation [PDF]

open access: yes, 2014
We compute the scattering cross section of Reissner-Nordström black holes for the case of an incident electromagnetic wave. We describe how scattering is affected by both the conversion of electromagnetic to gravitational radiation, and the parity ...
A. A. Starobinsky   +7 more
core   +2 more sources

Curvature and the Backward Shift Operators [PDF]

open access: yesProceedings of the American Mathematical Society, 1984
Let φ α {\varphi _\alpha } be a Möbius transformation of the unit disk D {\mathbf {D}} , | α | > 1 \left | \alpha \right | > 1 . We characterize all the operators T
openaire   +1 more source

Translational Optic Flow Induces Shifts in Direction of Active Forward and Backward Self-Motion

open access: yesi-Perception, 2011
Previously, we reported that when observers passively experience real linear oscillatory somatic motion while viewing orthogonal visual optic flow patterns, their perceived motion direction is intermediate to those specified by visual and vestibular ...
Kenzo Sakurai, Philip M. Grove
doaj   +1 more source

Mixing unilateral backward shifts

open access: yes, 2022
In this paper, we characterize mixing unilateral backward shifts on barrelled and ultrabarrelled topological sequence spaces respectively, which extend several well-known results in the existing literature. We present some nontrivial examples to show the validity of our results.
openaire   +2 more sources

Generalized Backward Shifts on Banach Spaces

open access: yesJournal of Mathematical Analysis and Applications, 2001
For a bounded linear operator \(T\) on a Banach space \(X\), \(\text{Ker\,}T\) and \(\text{Ran\,}T\) denote respectively the kernel and range of \(T\). \(T\) is said to be a generalized forward shift if (1) \(T\) is an isometry on \(X\), (2) \(\text{Ran\,}T\) is of \(\text{codim\,}1\), (3) \(\bigcap_{n\geq 1}\text{Ran\,}T^n= \{0\}\).
Rassias, Themistocles M., Sundaresan, K.
openaire   +1 more source

Doppler-Based Acoustic Gyrator

open access: yesApplied Sciences, 2018
Non-reciprocal phase shifters have been attracting a great deal of attention due to their important applications in filtering, isolation, modulation, and mode locking.
Farzad Zangeneh-Nejad, Romain Fleury
doaj   +1 more source

Personnel shift assignment: Existence conditions and network models [PDF]

open access: yes, 1993
The personnel scheduling problem is known to be a five-stage process in which the final stage involves the assignment of shifts to the days worked in the schedule.
Balakrishnan   +6 more
core   +3 more sources

Experience and abstract reasoning in learning backward induction

open access: yesFrontiers in Neuroscience, 2012
Backward induction is a benchmark of game theoretic rationality, yet surprisingly little is known as to how humans discover and initially learn to apply this abstract solution concept in experimental settings.
Daniel R. Hawes   +2 more
doaj   +1 more source

Detecting patterns of species diversification in the presence of both rate shifts and mass extinctions [PDF]

open access: yes, 2015
Recent methodological advances are enabling better examination of speciation and extinction processes and patterns. A major open question is the origin of large discrepancies in species number between groups of the same age.
Laurent, Sacha   +2 more
core   +4 more sources

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