- document
-
Bongers, C.C.W.G. (author), de Korte, J.Q. (author), Catoire, M. (author), Greefhorst, J. (author), Hopman, M.T.E. (author), Kingma, B. (author), Eijsvogels, T.M.H. (author)COVID-19 healthcare personnel (HCP) use personal protective equipment (PPE; ie, isolation gowns, eye protection, facemasks and respirators) to safely perform their medical duties. However, PPE creates a microenvironment around the skin due to a higher thermal resistance and lower water vapour permeability of the materials being used compared...article 2021
- document
-
Kingma, B.R.M. (author)Exposure to challenging thermal environments such as jungle, desert, arctic, maritime, coastal shores and mountains can impose hazardous working conditions to NATO ground forces. This report describes a) an overview of models on how to estimate the thermal load from clothing and equipment, b) a methodology on how to incorporate the effects of...report 2020
- document
- van Beurden, M. (author), Roijendijk, L. (author), Kingma, B. (author) conference paper 2019
- document
-
Bogerd, C.P. (author), Velt, K.B. (author), Annaheim, S. (author), Bongers, C.C.W.G. (author), Eijsvogels, T.M.H. (author), Daanen, H.A.M. (author)OBJECTIVE: The discomfort caused by rectal probes and esophageal probes for the estimation of body core temperature has triggered the development of gastrointestinal (GI) capsules that are easily accepted by athletes and workers due to their non-invasive characteristics. We compare two new GI capsule devices with rectal temperature during cycle...article 2018
- document
-
Bongers, C.W.G. (author), Daanen, H.A.M. (author), Bogerd, C.P. (author), Hopman, M.T.E. (author), Eijsvogels, T.M.H. (author)Purpose: Telemetric temperature capsule systems are wireless, relatively non-invasive and easily applicable in field conditions, and have therefore great advantages for monitoring core body temperature. However, the accuracy and responsiveness of available capsule systems have not been compared previously. Therefore, the aim of this study was to...article 2017
- document
-
Willemse, C.J.A.M. (author)One of the research areas within affective Computer Mediated Communication currently under investigation is that of mediated social touch. A social touch is a complex composition of different physical parameters that can be simulated by haptic technologies. In this article we argue why we think it makes sense to incorporate warmth - and in...conference paper 2015
- document
-
Levels, K. (author), de Koning, J.J. (author), Mol, E. (author), Foster, C. (author), Daanen, H.A.M. (author)This study examined the effect of active pre-warming on speed and quality of performance during simulated firefighting exercise. Twelve male firefighters performed two trials in counterbalanced order. They were either pre-warmed by 20-min cycling at 1.5 Watt kg-1 body mass (WARM) or remained thermoneutral (CON) prior to a simulated firefighting...article 2014
- document
-
Daanen, H.A.M. (author), van Ling, S. (author), Tan, T.K. (author)Background: It has been shown that endurance performance after one night of sleep deprivation is not compromised despite the feeling of fatigue and that, in contrast, performance in the heat deteriorates even though people may feel good. However, it is essentially unknown how the estimation of performance capabilities relate to actual...article 2013
- document
-
Teunissen, L.P.J. (author), Daanen, H.A.M. (author)Several studies suggest that the temperature of the inner canthus of the eye (Tca), determined with infrared thermal imaging, is an appropriate method for core temperature estimation in mass screening of fever. However, these studies used the error prone tympanic temperature as a reference. Therefore, we compared Tca to oesophageal temperature ...article 2011
- document
-
Ruijs, A.C.J. (author), Niehof, S.P. (author), Selles, R.W. (author), Jaquet, J.B. (author), Daanen, H.A.M. (author), Hovius, S.E.R. (author), TNO Defensie en Veiligheid (author)Purpose Posttraumatic cold intolerance (CI) is a frequent and important sequel after peripheral nerve injury. In this study, it is hypothesized that altered rewarming patterns after peripheral nerve injury are related to the degree of posttraumatic CI. This hypothesis is tested by quantitatively comparing rewarming patterns of the digits in...article 2009
- document
-
Daanen, H.A.M. (author), TNO Defensie en Veiligheid (author)Reactie op: Flouris, et al. Effect of body temperature on cold induced vasodilationa. Eur J Applied Phys 2008;104:491-499. De aurteurs hebben daar weer een reply op geschreven; Flouris AD, Cheung SS (2009) Authors’ response to H. Daanen’s ‘cold-induced vasodilation’ letter. Eur J Appl Physiol 106:317– 319article 2009
- document
-
Bröde, P. (author), Havenith, G. (author), Wang, X. (author), Candas, V. (author), den Hartog, E.A. (author), Griefahn, B. (author), Holmér, I. (author), Kuklane, K. (author), Meinander, H. (author), Nocker, W. (author), Richards, M. (author), TNO Defensie en Veiligheid (author)In order to assess the non-evaporative components of the reduced thermal insulation of wet clothing, experiments were performed with a manikin and with human subjects in which two layers of underwear separated by an impermeable barrier were worn under an impermeable overgarment at 20°C, 80% RH and 0.5 ms-1 air velocity. By comparing manikin...article 2008
- document
-
Raymann, R.J.E.M. (author), Swaab, D.F. (author), Van Someren, E.J.W. (author), TNO Defensie en Veiligheid (author)With ageing, an increasingly disturbed sleep is reported as a significant complaint affecting the health and well-being of many people. The available treatments for sleep disturbance have their limitations, so we have adopted a different approach to the improvement of sleep. Since in animal and human studies skin warming has been found to...article 2008
- document
-
Application of infrared thermography for the analysis of rewarming in patients with cold intoleranceRuijs, A.C.J. (author), Jaquet, J.B. (author), Brandsma, M. (author), Daanen, H.A.M. (author), Hovius, S.E.R. (author), TNO Defensie en Veiligheid (author)Cold intolerance is a serious long-term problem after injury to the ulnar and median nerves, and its pathophysiology is unclear. We investigated the use of infrared thermography for the analysis of thermoregulation after injury to peripheral nerves. Four patients with injuries to the ulnar nerve and four with injuries to the median nerve (4 12...article 2008
- document
-
Fronczek, R. (author), Raymann, R.J.E.M. (author), Romeijn, N. (author), Overeem, S. (author), Fischer, M. (author), van Dijk, J.G. (author), Lammers, G.J. (author), Van Someren, E.J.W. (author), TNO Defensie en Veiligheid (author)Context: Impaired vigilance and sleepiness are two major daily complaints of patients with narcolepsy. We previously showed their sleepiness to be correlated to an abnormally regulated skin temperature, i.e., increased distal skin temperature compared with proximal skin temperature. Objective: Our goal was to investigate a possible causal...article 2008
- document
-
Raymann, R.J.E.M. (author), Van Someren, E.J.W. (author), TNO Defensie en Veiligheid (author)Study Objectives. Sleep propensity and skin temperature are functionally related. In young adults, changes of skin temperature within the comfortable thermoneutral zone affect sleep-onset latency and vigilance performance. Aging is associated with both decreased thermosensitivity and poorer sleep. Our goal was to test whether subtle...article 2008
- document
-
Reffeltrath, P.A. (author), TNO Defensie en Veiligheid (author)Background: Helicopter pilots are often exposed to periods of high heat strain, especially when wearing survival suits. Therefore, a prototype of a ventilated vest was evaluated on its capability to reduce the heat strain of helicopter pilots during a 2-h simulated flight. Hypothesis: It was hypothesized that the ventilated vest would reduce...article 2006
- document
-
Daanen, H.A.M. (author), van Es, E.M. (author), de Graaf, J.L. (author), TNO Defensie en Veiligheid (author)The maximal power that muscles can generate is reduced at low muscle temperatures. However, in prolonged heavy exercise in the heat, a high core temperature may be the factor limiting performance. Precooling has been shown to delay the attainment of hyperthermia. It is still unclear if the whole body should be cooled or if the active muscles...article 2006
- document
-
Daanen, H.A.M. (author), TNO Defensie en Veiligheid (author)Several publications indicate that the infrared tympanic temperature (IRTT) underestimates the core temperature of the body when the ear canal is long, curvy and narrow. In order to quantify these observations, a study was performed in 10 subjects. The IRTT was determined and compared to the oesophageal temperature (Tes), taken as the reference...article 2006
- document
-
Kistemaker, J.A. (author), den Hartog, E.A. (author), Daanen, H.A.M. (author), TNO Defensie en Veiligheid (author)The SensorTouch thermometer performs an infrared measurement of the skin temperature above the Superficial Temporal Artery (STA). This study evaluates the validity and the accuracy of the SensorTouch thermometer. Two experiments were performed in which the body temperature was measured with a rectal sensor, with an oesophageal sensor and with...article 2006