Correction to: Mastering Uncertainty in Mechanical Engineering

Pelz, Peter F.; Groche, Peter; Pfetsch, Marc E.; Schaeffner, M

doi:10.1007/978-3-030-78354-9_8

Cited by 7 publications

(11 citation statements)

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“…Pelz (2000) found that PGA (Professional Golfer' Association) players were also affected by putting distance. It was confirmed that the success rate is lowered to 25% at a distance of 10 ft (3.05 m) [9]. Therefore, in this research experiment, the distance was set to 3 m to control the difficulty and to ensure the participants' concentration during the putting task.…”

Section: Introductionmentioning

confidence: 72%

The Effect of Olfactory Inhalation on KPGA Golfers’ Putting Performance, Postural Stability and Heart Rate

Ahn

2022

IJERPH

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Some athletes utilize olfactory inhalation treatments using ammonia salt and aromatic oils to attain their peak performance or for physical and psychological relaxation. However, there is still a lack of clear evidence on olfactory inhalation treatment and scent types via precise experiments, and there is no research regarding fine motor control performance in activities such as golf putting. Thus, the purpose of this study was to examine the effects of various olfactory inhalations (lavender, citrus, and ammonia) on professional golfers’ 3-meter putting performance (percentage of success), postural stability (CoP area), and heart rate (HR). In order to examine the effects of olfactory treatment on actual automated task performance, ten professional golfers were recruited for the putting task experiment. During the putting task, a biometric shirt was utilized to record the HR changes, and a force plate was used to measure changes in the CoP area. The results were as follows. First, the olfactory inhalation treatment inhibited the putting performance (no inhalation: 68.75%; lavender: 51.25%; citrus: 40.00%; ammonia: 52.50%); however, no statistically significant difference was found (p = 0.115). Second, the olfactory inhalation treatment inhibited postural stability while putting; it had a partially statistically significant lower value (address: p = 0.000; downswing: p = 0.035; total putting section: p = 0.047). Third, the olfactory inhalation treatment decreased the HR during putting; however, there was no statistically significant difference between groups (address: p = 0.838; putting: p = 0.878; total: p = 0.666). This study implies that olfactory inhalation affects putting performance, postural stability, and HR. The effect size results for the olfactory treatment in the CoP area during the putting task (address: η2 = 0.524; downswing: η2 = 0.349; total putting section: η2 = 0.298) suggest that arousal regulation through olfactory inhalation may have negative effects on dynamic postural stability in static tasks such as golf putting, showing the direction of its useful application for athletes in sports.

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Section: Introductionmentioning

confidence: 72%

The Effect of Olfactory Inhalation on KPGA Golfers’ Putting Performance, Postural Stability and Heart Rate

Ahn

2022

IJERPH

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“…The relationship between raw moments of ξ j and their coefficients P (k) i,j can be written in matrix form (the detail process could be seen in 27,34 ) Other types of uncertainty. Uncertainty mainly includes parameter uncertainty, model uncertainty, observation uncertainty, measure noise [35][36][37] . We have studied the effect of parameter uncertainty on resilience and now we discuss how observation uncertainty affects the resilience of the system.…”

Section: Methodsmentioning

confidence: 99%

Uncertainty quantification of multi-scale resilience in networked systems with nonlinear dynamics using arbitrary polynomial chaos

Zou

Fragonara

Qiu

et al. 2023

Sci Rep

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Complex systems derive sophisticated behavioral dynamics by connecting individual component dynamics via a complex network. The resilience of complex systems is a critical ability to regain desirable behavior after perturbations. In the past years, our understanding of large-scale networked resilience is largely confined to proprietary agent-based simulations or topological analysis of graphs. However, we know the dynamics and topology both matter and the impact of model uncertainty of the system remains unsolved, especially on individual nodes. In order to quantify the effect of uncertainty on resilience across the network resolutions (from macro-scale network statistics to individual node dynamics), we employ an arbitrary polynomial chaos (aPC) expansion method to identify the probability of a node in losing its resilience and how the different model parameters contribute to this risk on a single node. We test this using both a generic networked bi-stable system and also established ecological and work force commuter network dynamics to demonstrate applicability. This framework will aid practitioners to both understand macro-scale behavior and make micro-scale interventions.

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“…2. Euler diagram for classification of time-variant and timeinvariant processes, adopted from [2]. is determined to be ν t /h 2 0 with the eddy viscosity ν t and the water depth h 0 .…”

Section: Condition For Quasi-steady Flowmentioning

confidence: 99%

“…It is two-stage since first the design has to be optimised anticipating the operation o(t) and the boundary conditions c(t). This is typical for many engineering problems [2], [8]. While the operation parameter can be adapted after the installation, the design is fixed with construction.…”

Section: Array Optimisationmentioning

confidence: 99%

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Misled by Betz and unsteady flow

Pelz

Lemmer

Schmitz³

2022

Int. J. Mar. Ene.

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A turbine array is an adjustable flow resistanceR placed in a tidal channel. Ideally, it is designedand operated to maximise energy yield. Garrett & Cummins(2005), using optimal control theory applied to the RCelementchannel (R) and basin (C), showed: the energyextraction from the flow PT + PD is maximised when theflow rate is slowed down by a factor of 1/√3. This resultis independent of the ratio of the extracted mechanicalpower PT to the total power extraction including the powerloss PD due to the mixing of the bypass flows within theturbine field. The optimisation task for turbine arrays ismaximising PT. This objective raises two questions: ”Whatis the maximum power PT that can be extracted, and what isthe optimal design (size, topology) and operation to achievethis output?” When addressing them, the literature stilluses the Betz ‘limit’ as a reference. The work presentedhighlights two major problems. First, the Betz ’limit’ isnot a constant upper bound for open channel flow. Thisproblem has been discussed and solved by the first author(2011, 2020). Second and more importantly, the presentedpaper points out the misconception under which severalresearch studies referred to array topologies as ‘optimal’with regard to design and operation. Hereby, the presentedpaper contributes to the advancement of tidal power on anaxiomatic basis. The misleading by Betz and overvaluingof transient effects is made transparent in a scientificdiscourse.

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Correction to: Mastering Uncertainty in Mechanical Engineering

Abstract: .

Cited by 7 publications

References 0 publications

The Effect of Olfactory Inhalation on KPGA Golfers’ Putting Performance, Postural Stability and Heart Rate

The Effect of Olfactory Inhalation on KPGA Golfers’ Putting Performance, Postural Stability and Heart Rate

Uncertainty quantification of multi-scale resilience in networked systems with nonlinear dynamics using arbitrary polynomial chaos

Misled by Betz and unsteady flow

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