Searched for: subject%3A%22Alertness%22
(1 - 19 of 19)
document
Steinman, Y. (author), Groen, E. (author), Frings-Dresen, M.H.W. (author)
The purpose of the present study was to determine how hypoxia effects awareness of environment (AoE) in helicopter pilots operating at high altitude. Eight helicopter crews flew two operational flights in a flight simulator while breathing gas mixtures of 20.9% (equivalent to 0 m altitude) and 11.4% (equivalent to 4572 m or 15,000 ft altitude)...
article 2021
document
Gutteling, J.M. (author), Terpstra, T. (author), Kerstholt, J.H. (author)
Since November 2012, Dutch civil defense organizations employ NL-Alert, a cellular broadcast-based warning system to inform the public. Individuals receive a message on their mobile phone about the actual threat, as well as some advice how to deal with the situation at hand. This study reports on the behavioral effects of NL-Alert (n = 643). The...
article 2018
document
van Erp, J.B.F. (author), Toet, A. (author), Janssen, J.B. (author)
Multi-sensory warnings can potentially enhance risk communication. Hereto we investigated how temporal signal parameters affect perceived urgency within and across modalities. In an experiment, 78 observers rated the perceived urgency of uni-, bi-, and/or tri-modal stimuli as function of 25 combinations of pulse duration (range 100–1600 ms) and...
article 2015
document
Simons, M. (author), Martens, M.H. (author), Ramaekers, J. (author), Krul, A. (author), Klöpping-Ketelaars, I. (author), Skopp, G. (author)
Rationale In party circuits dexamphetamine is frequently used in combination with alcohol. It is hypothesized that co-administration of dexamphetamine to alcohol might reduce the sedative effects of alcohol, but may potentiate risk-taking behaviour. Objectives The study was aimed at assessing the effects of alcohol, dexamphetamine and the...
article 2012
document
Simons, M. (author), Wilschut, E.S. (author), Valk, P.J.L. (author)
Introduction : Dutch North Sea helicopter operations are characterized by multiple sector flights to offshore platforms under difficult environmental conditions. In the context of a Ministry of Transport program to improve safety levels of helicopter operations, we assessed effects of pre-duty sleep, pre-duty travel time, and workload factors on...
article 2011
document
van den Broek, A.C. (author), Deves, T.K.G. (author), Neef, R.M. (author), Smith, A.J.E. (author), TNO Defensie en Veiligheid (author)
In present-day military security operations threats are more difficult to reveal than inconventional warfare theatres, since they take place during the course of normal life. For example, during maritime missions in littoral environments, acts of piracy, drug trafficking and other threatening events become obscured in the crowd of everyday...
conference paper 2010
document
TNO Defensie en Veiligheid (author), van Vliet, S.A.M. (author), Jongsma, M.J. (author), Vanwersch, R.A.P. (author), Olivier, B. (author), Philippens, I.H.C.H.M. (author)
article 2008
document
van Dorp, E. (author), Los, M. (author), Dirven, P. (author), Sarton, E. (author), Valk, P. (author), Teppema, L. (author), Stienstra, R. (author), Dahan, A. (author), TNO Defensie en Veiligheid (author)
Introduction: Exposure to a hypoxic environment has a deleterious effect on physiological and mental functions. We studied the effect of added inspired CO2 during artificially induced hypoxic normobaric hypoxia (oxygen saturation ∼80%) on complex task performance. Methods: In random order, 22 healthy volunteers were exposed to 3 gas mixtures for...
article 2007
document
TNO Kwaliteit van Leven (author), Visser, R. (author), Hooftman, W. (author), Könemann, R. (author), Brouwers, A. (author)
In 2003 is op initiatief van het Ministerie van SZW het programma versterking Arbobeleid Gevaarlijke Stoffen (VASt) van start gegaan. Beoogd werd de versterking van het bewustzijn van de risico’s van het werken met gevaarlijke stoffen. Het programma VASt heeft de zelfwerkzaamheid van werkgevers en werknemers gestimuleerd en ondersteund met als...
report 2007
document
TNO Defensie en Veiligheid (author), van Vliet, S.A.M. (author), Jongsma, M.J. (author), Vanwersch, R.A.P. (author), Olivier, B. (author), Philippens, I.H.C.H.M. (author)
Rationale: Modafinil is increasingly used in sleep disturbances in general and in neurodegenerative diseases and is recently being used in healthy people for attention control. However, the application of modafinil is possibly not only restricted to alertness enhancing effects. More insight in this compound may lead to new applications. Not all...
article 2006
document
Simons, M. (author), Koerhuis, C.L. (author), Valk, P.J.L. (author), van den Oord, M.H.A.H. (author)
Insufficient daytime sleep may result in reduction of effectiveness and safety during overnight military missions. The usefulness of temazepam and zaleplon to optimize afternoon sleep and their effects on performance and alertness during a subsequent night shift were studied. Method: In a randomized double-blind within-subjects design, 11...
article 2006
document
Simons, R, (author), Valk, P. (author)
Korte schets van de bijdrage aan het Europese Fit-to Fly project ( Early Warning Systems sensoren) van TNO Defensie en Veiligheid en hun eigen onderzoek naar fase-verschuiving van de slaap en strategisch gedoseerde slaapperioden. De eisen die een missie aan het personeel stelt, de verstoring van het biologische lichaamsritme en matige...
article 2006
document
van den Brink, J, (author)
De bemanning van een pantservoertuig opereert het liefst boven pantser. Dan is er beter zicht op de omgeving. De voor de missie relevante informatie kan zo beter waargenomen en geïnterpreteert worden, zodat doelgericht tot actie kan worden overgaan. In het kader van het doelfinancieringsprogramma V520, Technologieën voor landgebonden platforms,...
article 2006
document
Markus, C.R. (author), Jonkman, L.M. (author), Lammers, J.H.C.M. (author), Deutz, N.E.P. (author), Messer, M.H. (author), Rigtering, N. (author), TNO Kwaliteit van Leven TNO Voeding (author)
Background: Brain serotonin function is thought to promote sleep regulation and cognitive processes, whereas sleep abnormalities and subsequent behavioral decline are often attributed to deficient brain serotonin activity. Brain uptake of the serotonin precursor tryptophan is dependent on nutrients that influence the availability of tryptophan...
article 2005
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TNO Defensie en Veiligheid (author), Klöpping, W.A.A. (author), Jonkman, A.G. (author), Valk, P. (author), Simons, M. (author)
Introduction: During sustained operations, a combined use of a hypnotic to induce sleep under difficult circumstances and a psychostimulant to improve performance and alertness during night-shift work or after sleep deprivation may be necessary. This study was conducted to evaluate the effect of modafinil and caffeine as countermeasures to...
bookPart 2005
document
Valk, P.J.L. (author), van Roon, D.B. (author), Simons, M. (author), Rikken, G. (author)
Sustained vigilance is required by pilots and crew during flight; therefore, the use of antihistamines with sedating properties is widely prohibited. The purpose of this study was to determine the effects of desloratadine, a long-acting, nonsedating antihistamine, on healthy volunteers placed under conditions of simulated cabin pressure. Methods...
article 2004
document
de Jong, A.N. (author), Schwering, P.B.W. (author)
During the last decade, protection of military and civilian operational platforms against weapons like guns, grenades, missiles, Unmanned Combat Aerial (and surface) Vehicles (UCAV's) and mines, has been an issue of increased importance due to the improved kill-probability of these threats. The standard countermeasure package of armour, guns,...
conference paper 2003
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Perdok, J. (author), Gaillard, A.W.K. (author), Instituut voor Zintuigfysiologie TNO (author)
Slow EEG potentials were recorded during the foreperiod of a signal detection task which involved different levels of discrimination difficulty. The subject was requried to react to S2 as quickly as possible or to delay his responses by 1 s. It was found that the contingent negative variation (CNV) was attenuated when no speeded response was...
article 1979
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Wolthuis, O.L. (author), de Wied, D. (author), Medisch Biologisch Laboratorium TNO Chemisch Laboratorium TNO (author)
Averaged visual evoked responses (VER) in cortical area 17 were recorded one hour after the administration of 7-l-phe ACTH(4-10) or 7-d-phe ACTH(4-10) to artificially ventilated rats, paralysed with gallamine. In addition, the effects of these peptides on spontaneous motor behavior were analyzed. The results show that the latencies of all VER...
article 1976
Searched for: subject%3A%22Alertness%22
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