Results 41 to 50 of about 202,689 (293)

The development and validation of an easy to use automatic QT-interval algorithm.

open access: yesPLoS ONE, 2017
BackgroundTo evaluate QT-interval dynamics in patients and in drug safety analysis, beat-to-beat QT-interval measurements are increasingly used. However, interobserver differences, aberrant T-wave morphologies and changes in heart axis might hamper ...
Ben J M Hermans   +8 more
doaj   +1 more source

Adaptation of constant effort sampling and of removal trapping for the estimation of populations of microscopic organisms in dense substrates () [PDF]

open access: yesActa Amazonica, 1980
Large numbers of thecamoebae are found in the sand and detritus substrate of small streams in the Amazonian terra firme forest. Their relative population densities can be determined by searching and counting thecae under a dissecting microscope for a ...
Ilse Walker, Maryolanda Trindade Lages
doaj   +1 more source

Elimination of the Femoral Neck in Measuring Femoral Version Allows for Less Variance in Interobserver Reliability

open access: yesMedicina, 2021
Background and Objectives: Producing consistent measures of femoral version amongst observers are necessary to allow for an assessment of version for possible corrective procedures.
Radomir Dimovski   +5 more
doaj   +1 more source

Task Dependent Effects of Head Orientation on Perceived Gaze Direction

open access: yesFrontiers in Psychology, 2018
The perception of gaze direction involves the integration of a number of sensory cues exterior to the eye-region. The orientation of the head is one such cue, which has an overall repulsive effect on the perceived direction of gaze.
Tarryn Balsdon   +2 more
doaj   +1 more source

Distributed Interval Observers with Switching Topology Design for Cyber-Physical Systems

open access: yesMathematics
In this paper, the distributed interval estimation problem for networked Cyber-Physical systems suffering from both disturbances and noise is investigated.
Junchao Zhang, Jun Huang, Changjie Li
doaj   +1 more source

Interval observers for continuous-time linear systems

open access: yes, 2012
International audienceWe consider continuous-time linear systems with additive disturbances and discrete-time measurements. First, we construct an observer, which converges to the state trajectory of the linear system when the maximum time interval ...
Kieffer, Michel   +2 more
core   +3 more sources

Acceleration-induced nonlocality: kinetic memory versus dynamic memory [PDF]

open access: yes, 2001
The characteristics of the memory of accelerated motion in Minkowski spacetime are discussed within the framework of the nonlocal theory of accelerated observers. Two types of memory are distinguished: kinetic and dynamic.
Giglio, Eric   +2 more
core   +4 more sources

INTERVAL STATE ESTIMATION FOR SINGULAR DIFFERENTIAL EQUATION SYSTEMS WITH DELAYS [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2016
The paper deals with linear differential equation systems with algebraic restrictions (singular systems) and a method of interval observer design for this kind of systems.
T. A. Kharkovskaia   +2 more
doaj   +1 more source

Circular Holonomy and Clock Effects in Stationary Axisymmetric Spacetimes [PDF]

open access: yes, 2001
Stationary axisymmetric spacetimes containing a pair of oppositely-rotating periodically-intersecting circular geodesics allow the study of various so-called `clock effects' by comparing either observer or geodesic proper time periods of orbital circuits
Bini, Donato   +2 more
core   +2 more sources

Can we monitor adaptation of juvenile goats to a new social environment through continuous qualitative behaviour assessment? [PDF]

open access: yesPLoS ONE, 2018
We aimed to verify whether Continuous Qualitative Behaviour Assessment (10 observers used a list of six qualitative descriptors) paired with Temporal Dominant Behavioural Expression (the same observers were asked to select the dominant descriptor and to ...
Fabio Napolitano   +5 more
doaj   +1 more source

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