2007, Piran, Slovenia

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Environmental Ergonomics XII Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana <strong>2007</strong> effect on cognitive performance, although it did reduce cardiovascular strain. It should be noted, however, that during the CFT’s in the HSHC condition, core temperature increased more rapidly in the CON compared to the HC trial and the possible consequences of rate of rise of core body temperature on perception should be investigated further. ACKNOWLEDGEMENTS SES would like to thank Unilever R&D for sponsoring this research and Cognitive Drug Research for providing the battery of cognitive tasks. REFERENCES Bond, A. & Lader, M (1974). The use of analogue scales in rating subjective feelings. British Journal of Medical Psychology, 47, 211-218. Wesnes, K. A. Ward, T. McGinty, A. Petrini, O. (2000). The memory enhancing effects of a Ginkgo biloba/Panax ginseng combination in healthy middle aged volunteers. Psychopharmacology, 152, 353-361. 116
Cognitive and Psycophysiological Function THE REPRODUCIBILITY AND VALIDITY OF VISUAL ANALOGUE SCALES (VAS) THAT ASSESS THERMAL PERCEPTIONS IN STABLE AND DYNAMIC, ASYMMETRIC ENVIRONMENTS Sarah Davey, Tara Reilly, Mark Newton and Michael Tipton Department of Sport & Exercise Science, Institute of Biomedical & Biomolecular Sciences, University of Portsmouth, UK. Contact person: sarah.davey@port.ac.uk INTRODUCTION Historically, 4-7 point Likert or categorical scales have been used to assess the perceptions of humans of their thermal state (Fanger, 1970). The validity of these scales in stable uniform environments has been well established (ASHRAE, 1997), however their application in dynamic, asymmetric environments producing small changes in human thermal perceptions is less well understood and may be compromised; for example, when assessing the impact of regional heating or cooling on overall thermal perception (Zhang, 2003). In such situations, visual analogue scales (VAS) could provide a more sensitive tool by enabling finer adjustments. However, a possible drawback of being more sensitive is a reduction in reproducibility. The aim of this investigation was to evaluate the reproducibility and validity of visual analogue scales to assess local and overall thermal comfort (TC) and temperature sensation (TS) in stable and dynamic, asymmetric environments. METHODS Following ethical approval, nine heat acclimated males aged (mean ±SE) 20.4 ± 2.2 y., mass 73.18 ± 7.8kg, Body fat (%) 13.15 ± 5.1, VO2max 64.48 ± 7.1 mL. kg -1 .min -1 completed three identical trials where their perceptual measurements of TS, torso temperature sensation (TTS), TC and torso thermal comfort (TTC) were assessed every five minutes whilst walking on a treadmill (4.5-5km.h -1 , 2% incline) in an hot environment (35 o C, 50% RH) for 130 mins. To assess local and overall thermal perceptions in static and dynamic thermal conditions, the subjects wore an air cooled garment (ACG) over the torso, this enabled the temperature and humidity of the air entering the microclimate to be manipulated. Each subject followed one of two microclimate profiles (Figure 1), each consisting of two phases, stable (0-60mins) and dynamic (60-130mins). Thermal Perceptual Scales The VAS were adapted from scales previously developed to investigate local and overall TS and TC in dynamic, asymmetric environments (Zhang, 2003). To validate the VAS, measurements were taken alongside previously validated Likert scales (LS) (ASHRAE, 1997). Physiological measurements included rectal temperature (T core), mean torso temperature (chest and shoulder) (T skintorso) and body temperature (T body = 0.8 T core + 0.2 T skintorso). Both scales were displayed on a touch screen monitor, a stylus pen was used to enter data. 117
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ENVIRONMENTAL ERGONOMICS XII Procee
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ENVIRONMENTAL ERGONOMICS XII Procee
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International Conferences on Enviro
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TABLE OF CONTENTS Table of contents
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Table of contents ALTITUDE ATTENUAT
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Table of contents TOWARDS PREVENTIO
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Table of contents RATE AFFECT EXERC
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Table of contents Uroš Dobnikar, S
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Table of contents TO A HOT ENVIRONM
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Table of contents Andreas D. Flouri
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Table of contents PHYSICAL FITNESS
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Table of contents ESTIMATION OF THE
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Herman Potocnic Lecture the advanta
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Invited presentation Gravitational
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Gravitational Physiology SKELETAL M
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Lf (mm) 50.0 40.0 30.0 20.0 10.0 Fa
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Gravitational Physiology maximum is
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Gravitational Physiology THERMOREGU
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Gravitational Physiology THE EXERCI
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Gravitational Physiology Since exer
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Gravitational Physiology During the
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Gravitational Physiology CARDIOVASC
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as observed at rest after LBNP was
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Gravitational Physiology THERMOREGU
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Gravitational Physiology THE EFFECT
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Gravitational Physiology Fortney SM
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Gravitational Physiology Contractil
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Gravitational Physiology Edgerton V
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Diving Physiology A library of imag
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Diving Physiology Information recal
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Diving Physiology RESULTS Figure 1
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Diving Physiology sensitivity is no
Page 65 and 66: Diving Physiology Physiological Mea
Page 67 and 68: Diving Physiology same sequence. Th
Page 69 and 70: Diving Physiology HYPERVENTILATION
Page 71 and 72: Diving Physiology software. Individ
Page 73 and 74: Diving Physiology REFERENCES IMCA.
Page 75 and 76: Diving Physiology recorded (MIE Med
Page 77 and 78: Diving Physiology DISCUSSION The ma
Page 79 and 80: Altitude Physiology vastus laterali
Page 81 and 82: Altitude Physiology IS INTERMITTENT
Page 83 and 84: Altitude Physiology Table 2: Lactat
Page 85 and 86: Altitude Physiology CARBOHYDRATE IN
Page 87 and 88: Altitude Physiology Figure 1: Mean
Page 89 and 90: Altitude Physiology HYPOXIA INDUCED
Page 91 and 92: Altitude Physiology Figure 1. Mean
Page 93 and 94: Altitude Physiology ANALYSIS OF MUS
Page 95 and 96: SOL MG TA BF VM Altitude Physiology
Page 97 and 98: Altitude Physiology LOAD CARRIAGE I
Page 99 and 100: Table 2: Differential ratings of pe
Page 101 and 102: Altitude Physiology EFFECTS OF INTE
Page 103 and 104: Cerebral deoxy-Hb (delta, µM) Cere
Page 105 and 106: Altitude Physiology ENDURANCE RESPI
Page 107 and 108: Altitude Physiology Wylegala JA, Pe
Page 109 and 110: Invited presentation Cognitive and
Page 111 and 112: Cognitive and Psycophysiological Fu
Page 115: Cognitive and Psycophysiological Fu
Page 129 and 130: Cognitive and psychophysiological f
Page 131 and 132: CLOTHING AND TEXTILE SCIENCE 131
Page 133 and 134: Clothing SPACER FABRICS IN OUTDOOR
Page 135 and 136: F i / g m -2 4,0 3,5 3,0 2,5 2,0 1,
Page 137 and 138: Clothing TOTAL EVAPORATIVE RESISTAN
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Page 141 and 142: Clothing DIFFERENCES IN CLOTHING IN
Page 143 and 144: Clothing parallel It values ranged
Page 145 and 146: Clothing CORRELATION BETWEEN SUBJEC
Page 147 and 148: Clothing and left side chest, scapu
Page 149 and 150: Clothing studies using an ice vest
Page 151 and 152: Insulation (Clo) (Clo) Clo / kg 6 5
Page 153 and 154: Clothing EFFECTS OF MOISTURE TRANSP
Page 155 and 156: Clothing the P plots above 60%RH (p
Page 157 and 158: Clothing EFFECT OF CLOTHING INSULAT
Page 159 and 160: Clothing EFFECTS OF QUILT AND MATTR
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Page 163 and 164: Clothing German) were measured, and
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Clothing Table 1. Comparison of ski
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Clothing PHYSIOLOGICAL RESPONSES AT
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Clothing underwear at 25 °C in per
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Clothing REDUCTION OF HEAT STRESS I
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Clothing THE INTERACTION BETWEEN PH
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Relative humidity (%) Clothing Figu
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Clothing DEVELOPMENT OF THE “WEAR
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Clothing EFFECTS OF AIR GAPS UNDER
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Temper at ur e( ˇ ć) 28.5 27.5 26
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Personal protective equipment Invit
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Personal protective equipment fabri
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Personal protective equipment PHYSI
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Mean skin temperature (ºC) 38.0 37
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Personal protective equipment the S
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Personal protective equipment DISCU
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Personal protective equipment Final
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Personal protective equipment REFER
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Personal protective equipment Tc wa
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Personal protective equipment level
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F i / g m -2 300 250 200 150 100 50
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h M / % 90 80 70 60 50 40 activity
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Personal protective equipment 0.05
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Personal protective equipment was u
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Personal protective equipment THERM
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Personal protective equipment the s
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Personal protective equipment the c
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Personal protective equipment wette
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Table 1 1. Properties of the tested
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Personal protective equipment HEAT
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Personal protective equipment Profi
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Personal protective equipment PHYSI
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Personal protective equipment REDUC
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39.0 38.5 38.0 37.5 37.0 36.5 40.0
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Personal protective equipment EXERC
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Personal protective equipment appro
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Personal protective equipment Table
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Personal protective equipment reduc
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Invited presentation Non-thermal fa
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Non-thermal factors heat loss by al
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Non-thermal factors DOES A FATIGUE-
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Non-thermal factors cycling, despit
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Non-thermal factors INDIVIDUAL VARI
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Non-thermal factors to some categor
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Non-thermal factors RATES OF TOTAL
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Non-thermal factors CHANGES IN BLOO
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Non-thermal factors Table 1. Thresh
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Non-thermal factors THE DIFFERENCE
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Water intake(g) 2000 1800 1600 1400
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Non-thermal factors IMPROVED FLUID
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Non-thermal factors A tendency for
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Sweating Table 1: Sweat gland count
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Sweating Taylor, N.A.S. (2000). Reg
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Sweating back/waist area and finall
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Figure 1: A chrome dome following p
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Sweating Such differences could be
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Sweating the forearm and thigh skin
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Sweating dramatically after puberty
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Sweating In addition local sweating
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Sweating REGIONAL FOOT SWEAT RATES
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Sweating REGIONAL SWEAT RATES OF TH
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Sweating Figure 2 shows the skin te
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Sweating SWEATY HANDS: DIFFERENCES
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Sweating Figure 2: Inter-site sweat
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Sweating REGIONAL DIFFERENCES IN TO
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Sweating Figure 2: Inter-site sweat
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Sweating MENSTRUAL CYCLE DOES NOT A
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Sweating RESULTS On average, the ma
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Sweating THE SWEAT SECRETION AND SO
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Sweating Figure 1: A quadrant diagr
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Invited presentation FINGER COLD IN
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Cold physiology INTRA-INDIVIDUAL DI
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Cold physiology number was estimate
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Cold physiology cold receptors decr
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Cold physiology EFFECT OF URAPIDIL
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Cold physiology THE EFFECT OF EXERC
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TRAINABILITY OF COLD INDUCED VASODI
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Cold physiology REFERENCES Adams, T
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Cold physiology THE EFFECT OF REPEA
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Cold physiology THE EFFECT OF ALTIT
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Cold physiology SKIN SURFACE MENTHO
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Cold physiology COGNITIVE PERFORMAN
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Seconds 6.5 6.0 5.5 5.0 4.5 4.0 3.5
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Cold water immersion REFERENCES Mek
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Cold water immersion the formula: M
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Cold water immersion REFERENCES Cho
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Cold water immersion were: 1 metre
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Cold water immersion surf beaches.
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Cold water immersion Table 1. Break
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Cold water immersion ARM INSULATION
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Cold water immersion RESULTS Experi
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Cold water immersion thermogenesis
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Cold water immersion The other comp
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Cold water immersion REFERENCES And
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Thermal comfort THERMAL SENSATIONS
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Exer - cise PC Wind (m·s -1 ) 0 ne
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Thermal comfort and heart rate usin
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Thermal comfort A NEW METHOD FOR EV
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Thermal comfort DEVELOPMENT OF AN I
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Thermal comfort DISCUSSION This new
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Thermal comfort limit of exposure d
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Table 2: Statistical summary. Gende
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Thermal comfort comfortable”), wh
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Thermal comfort RELATION BETWEEN TH
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Thermal comfort Figure 2. Skin wett
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Thermal comfort THE EVALUATION OF T
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Temp.ˇ ]˘ Jˇ ^ 42 40 38 36 34 32
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time(min) Thermal comfort WHY DO JA
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Thermal comfort TCT : THERMAL COMFO
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Thermal comfort INTERNATIONAL STAND
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Acute and chronic heat exposure PHY
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Acute and chronic heat exposure Fig
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Acute and chronic heat exposure EFF
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Acute and chronic heat exposure 2.2
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Acute and chronic heat exposure EFF
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Acute and chronic heat exposure A N
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Acute and chronic heat exposure of
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Acute and chronic heat exposure PHY
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Acute and chronic heat exposure Tab
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Acute and chronic heat exposure INT
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probability plot 99 95 80 60 40 20
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Acute and chronic heat exposure HAN
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Acute and chronic heat exposure ALL
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Acute and chronic heat exposure Tab
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Acute and chronic heat exposure UNC
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Thermal Sensation Scale 10 9 8 7 6
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Acute and chronic heat exposure RES
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Acute and chronic heat exposure eve
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Acute and chronic heat exposure 30%
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Acute and chronic heat exposure REF
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RADIANT FLOW THROUGH BICYCLE HELMET
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Figure 2. Difference in heat transf
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Manikins DEVELOPMENT OF A LYING DOW
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IT = 6.45( _ ,Tsk - _ ,Tair)/(Q/A)
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Manikins cases. If the body is even
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Heat balance components 100% 80% 60
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Manikins clothing system. This effe
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Manikins The coupled system was val
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Manikins A NOVEL APPROACH TO MODEL-
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Manikins THERMAL MANIKIN EVALUATION
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SR (g/min) Figure 2. Predictive mod
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ESTIMATION OF COOLING EFFECT OF ICE
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Manikins Figure 3: Comparison among
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Manikins EVALUATION OF THE ARMY BOO
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Ty [Nm] 60 50 40 30 20 10 0 0 5 10
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Manikins different black 100% cotto
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Manikins REFERENCES Bogerd, C.P., H
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Modelling RESULTS From this kind of
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Modelling (T , T , V& , ) = 1. 0 +
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NORMALIZED CVCL 8 7 6 5 4 3 2 1 0 M
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Modelling illustrated in Figure 1.
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Modelling MODELLING PATIENT TEMPERA
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Modelling Figure 1: Blood and mean
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Modelling simulations the additiona
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Modelling Table 1. Descriptive summ
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Modelling concomitant increase in b
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Modelling REFERENCES 1. U.S. Depart
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Modelling from the 1988 population.
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Modelling somatotypes in multivaria
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Modelling Each scan data was first
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Modelling The line through the data
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Hip( width) −Waist ( width ) HW
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Modelling measurements are extracte
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Measurement methods not included in
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Measurement methods humidity. The o
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Measurement methods DISCUSSION Base
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Air film Skin surface Skin layer δ
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Measurement methods and calculated
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Rectal temperature ( o C) 39.5 39.0
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Measurement methods work rates, and
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Measurement methods HUMIDEX: CAN TH
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Measurement methods highlighted. In
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Invited presentation Universal Ther
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Universal Thermal Climate Index dat
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Universal Thermal Climate Index DYN
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Universal Thermal Climate Index DIS
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Universal Thermal Climate Index COM
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Skin temperature (°C) Universal Th
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Universal Thermal Climate Index PRO
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Universal Thermal Climate Index The
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Universal Thermal Climate Index ASS
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Universal Thermal Climate Index ima
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Universal Thermal Climate Index min
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Working environment EFFECTS OF LIGH
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Working environment It is interesti
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30 25 20 15 10 5 0 25 12 Working en
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Working environment ERGONOMICS OPTI
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Working environment astigmatism, an
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Working environment RESULTS The hig
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Working environment hearing protect
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Working environment Redistribution
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Working environment DISCUSSION Thes
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Working Environment over the phone
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Working Environment DISCUSSION Diff
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Working Environment results, conclu
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Working Environment BP as the refer
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Working Environment significantly a
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Working Environment responses betwe
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Working Environment Casualty handli
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Working Environment REFERENCES Davi
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Working Environment RESULTS The sub
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Temperature (C) 35 33 31 29 27 25 2
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Working Environment METHODS Student
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Working Environment ANTHROPOGENIC I
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Working Environment RESULTS The res
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Employment Standards VISUAL ACUITY
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Employment Standards Results are pr
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Employment Standards to spend free
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Occupational Thermal Problems and d
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Occupational Thermal Problems HEAT
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Occupational Thermal Problems some
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Occupational Thermal Problems HORSE
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Occupational Thermal Problems range
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Occupational Thermal Problems PHYSI
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Occupational Thermal Problems DISCU
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Occupational Thermal Problems recom
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DLEmin [hours] 7,0 6,0 5,0 4,0 3,0
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Occupational Thermal Problems EFFEC
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Occupational Thermal Problems PERIP
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Occupational Thermal Problems durin
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Occupational Thermal Problems PRODU
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Time (hours) 4 3,5 3 2,5 2 1,5 1 0,
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Occupational Thermal Problems (Suun
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Occupational Thermal Problems highl
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Occupational Thermal Problems and o
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1) estimated (208 - 0.7 x age) *P
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Occupational Thermal Problems of a
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Occupational Thermal Problems tempe
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Table 1: Environmental conditions o
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Occupational Thermal Problems The h
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Occupational Thermal Problems RESUL
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Occupational Thermal Problems PHYSI
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Occupational Thermal Problems corre
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Occupational Thermal Problems DEVEL
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Occupational Thermal Problems All i
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A Adolfsson Niklas 540 Ainslie Phil
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Kim Myung-Ju 409 Kim Taegyou 189 Kl
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Sormunen Erja 599 Spindler Uli 145
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SPONSOR 641
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