Measuring Self-adaptive UAV Operators’ Load-Shedding Strategies under High Workload

Schulte, Axel; Donath, Diana

doi:10.1007/978-3-642-21741-8_37

Cited by 19 publications

(11 citation statements)

References 3 publications

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“…The regulation of work procedures as a function of task demands has been investigated in air traffic control literature. According to Donath and Schulte, operators adopt load-shedding strategies to keep the workload within bearable limits and to maintain acceptable performance [36]. These strategies are changing the way the task is accomplished in a more economic way in terms of individual resources.…”

Section: Fatigue Proofing Strategiesmentioning

confidence: 99%

Fatigue-related risk management in the emergency department: a focus-group study

et al. 2018

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Fatigue has major implications on both patient safety and healthcare practitioner's well-being. Traditionally, two approaches can be used to reduce fatigue-related risk: reducing the likelihood of a fatigued operator working (i.e. fatigue reduction), or reducing the likelihood that a fatigued operator will make an error (i.e. fatigue proofing). Recent progress mainly focussed on fatigue reduction strategies such as reducing work hours. Yet it has to be recognized that such approach has not wholly overcome the experience of fatigue. Our purpose is to investigate individual proofing and reduction strategies used by emergency physicians to manage fatigue-related risk. 25 emergency physicians were recruited for the study. Four focus groups were formed which consisted of an average of six individuals. Qualitative data were collected using a semi-structured discussion guide unfolding in two parts. First, the participants were asked to describe how on-the-job fatigue affected their efficiency at work. A mind map was progressively drawn based upon the participants' perceived effects of fatigue. Second, participants were asked to describe any strategies they personally used to cope with these effects. We used inductive qualitative content analysis to reveal content themes for both fatigue effects and strategies. Emergency physicians reported 28 fatigue effects, 12 reduction strategies and 21 proofing strategies. Content analysis yielded a further classification of proofing strategies into self-regulation, task re-allocation and error monitoring strategies. There is significant potential for the development of more formal processes based on physicians' informal strategies.

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Section: Fatigue Proofing Strategiesmentioning

confidence: 99%

Fatigue-related risk management in the emergency department: a focus-group study

et al. 2018

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“…If outside the region the operator is requested to log the target's current location; however, the operator is allowed to not log the target's location if other tasks seem more vital. Schulte and Donath (2011a) perform experiments in a similar setting.…”

Section: Operator Task Sheddingmentioning

confidence: 99%

“…In contrast to Savla and Frazzoli (2012) and Srivastava et al (2012) and motivated by Schulte and Donath (2011b), we assume that the operator workload impacts the likelihood that the operator will ignore a request for information.…”

Section: Operator Task Sheddingmentioning

confidence: 99%

Optimal Remote Estimation Over Use-Dependent Packet-Drop Channels

Ward

Martins

2016

IFAC-PapersOnLine

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Consider a discrete-time remote estimation system formed by an encoder, a transmission policy, a channel, and a remote estimator. The encoder assesses a random process that the remote estimator seeks to estimate based on information sent to it by the encoder via the channel. The channel is affected by Bernoulli drops. The instantaneous probability of a drop is governed by a finite state machine (FSM). The state of the FSM is denoted as the channel state. At each time step, the encoder decides whether to attempt a transmission through the packet-drop link. The sequence of encoder decisions is the input to the FSM. This paper seeks to design an encoder, transmission policy and remote estimator that minimize a finitehorizon mean squared error cost. We present two structural results. The first result in which we assume that the process to be estimated is white and Gaussian, we show that there is an optimal transmission policy governed by a threshold on the estimation error. The second result characterizes optimal symmetric transmission policies for the case when the measured process is the state of a scalar linear time-invariant plant driven by white Gaussian noise. Use-dependent packet-drop channels can be used to quantify the effect of transmission on channel quality when the encoder is powered by energy harvesting. An application to a mixed initiative system in which a human operator performs visual search tasks is also presented.

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“…Multi-tasking requires active, strategic management of the various task components. Such cognitive control is vulnerable to the demotivating effects of fatigue, as operators increasingly adopt effort-minimizing task strategies (Hockey, 1997), including task shedding (Schulte & Donath, 2011), and switching from a proactive to a reactive mode of control (Hockey et al, 1998;Sauer, Wastell, Hockey & Earle, 2003).…”

Section: Fatigue With Respect To Multi-rpa Controlmentioning

confidence: 99%