scholarly journals THERMAL SENSATION WITH CONTINUOUS TEMPERATURE CHANGE IN WALKING CONDITION : Field experiment at pedestrian spaces

2002 ◽  
Vol 67 (555) ◽  
pp. 21-27
Author(s):  
Chungyoon CHUN ◽  
Akihiro TAMURA
Keyword(s):  
Field Experiment ◽  
Temperature Change ◽  
Thermal Sensation ◽  
Condition Field ◽  
Continuous Temperature

Presentation of Rapid Temperature Change Using Spatially Divided Hot and Cold Stimuli

2013 ◽  
Vol 25 (3) ◽  
pp. 497-505 ◽  
Author(s):  
Katsunari Sato ◽  
◽  
Takashi Maeno
Keyword(s):  
Temperature Change ◽  
Thermal Sensation ◽  
Spatial Summation ◽  
Single Stimulus ◽  
Experimental Results ◽  
Thermal Perception ◽  
Rapid Temperature ◽  
Temperature Sense ◽  
Thermal Stimuli

We propose a thermal display that presents a rapid temperature change using spatially divided hot and cold stimuli. The display exploits two characteristics of human thermal perception: spatial summation and the adapting temperature. Experimental results confirmed that users perceived separate individual thermal stimuli as a single stimulus because of spatial summation. Our thermal display successfully made the skin simultaneously more sensitive to both hot and cold stimuli by using spatially divided hot and cold stimuli, each of which separately adjusts the adapting temperature so that it enables users to perceive thermal sensation rapidly. The thermal display that we fabricated enabled users to perceive a different temperature sense by changing the temperature of hot and cold stimuli.

Development of a temperature control procedure for a room air-conditioner using the concept of just noticeable difference (JND) on thermal sensation

1996 ◽  
Vol 40 (9) ◽  
pp. 473-477
Author(s):  
Chang K. Cho ◽  
Hak Min Lee ◽  
Myung Hwan Yun ◽  
Myun W. Lee
Keyword(s):  
Temperature Change ◽  
Temperature Control ◽  
Design Variable ◽  
Thermal Sensation ◽  
Just Noticeable Difference ◽  
Control Procedure ◽  
Air Conditioner ◽  
Ergonomic Design ◽  
Cooling Control ◽  
Cooling Procedure

Temperature control for an air-conditioner is an ergonomic design variable. Ergonomic studies on the thermal sensations in room environment are relatively few while many studies are available for the thermal sensations in extremely warm/cold conditions. The objective of this study was to find out factors which affect the cutaneous thermal sensations and so to propose new cooling control procedure using the JND(just noticeable difference) values of cutaneous thermal sensation for the design of an air-conditioner. The JNDs of cutaneous thermal sensation corresponding to the skin, room temperatures and temperature change rates were obtained. Based on the result of the study, a new cooling procedure using the concept of JND on thermal sensation was developed and applied to a new air-conditioner model.

The effect of temperature change rate on user thermal sensation and its implication for tablet computer heat dissipation design

2016 ◽  
Vol 60 (1) ◽  
pp. 785-789 ◽  
Author(s):  
Han Zhang ◽  
Alan Hedge
Keyword(s):  
Surface Temperature ◽  
Temperature Change ◽  
Heat Dissipation ◽  
Thermal Sensation ◽  
Heating Surface ◽  
Rate Of Change ◽  
Effect Of Temperature ◽  
Tablet Computer ◽  
Change Rate ◽  
Temperature Change Rate

Past research has shown that the rate of change of skin surface temperature can affect thermal sensation. This study investigated users’ thermal responses to a tablet heating surface with different heat pads and different temperature change rates. The test conditions included: A. keeping the surface at a constant 42°C, B. increasing the surface temperature from 38°C to 42°C at a rate of 0.02°C/s in progressive intervals, C. increasing the temperature at 0.15°C/s in progressive intervals, and D. Heating two left and right side pads alternately from 38°C to 42°C at 0.15°C/s in progressive intervals. Overall results showed the lowest temperature change rate of 0.02°C/s was most preferred in terms of thermal comfort. The findings suggest a potential to improve user thermal experience by dissipating tablet computer heat at a lower temperature change rate, or by alternating the dissipation areas.

Oral and Oropharyngeal Sensory Function in Adults With Chronic Obstructive Pulmonary Disease

2020 ◽  
Vol 29 (2) ◽  
pp. 864-872
Author(s):  
Fernanda Borowsky da Rosa ◽  
Adriane Schmidt Pasqualoto ◽  
Catriona M. Steele ◽  
Renata Mancopes
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Oral Cavity ◽  
Pulmonary Disease ◽  
Thermal Sensation ◽  
Sensory Function ◽  
Control Group ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Age Related ◽  
Copd Patients

Introduction The oral cavity and pharynx have a rich sensory system composed of specialized receptors. The integrity of oropharyngeal sensation is thought to be fundamental for safe and efficient swallowing. Chronic obstructive pulmonary disease (COPD) patients are at risk for oropharyngeal sensory impairment due to frequent use of inhaled medications and comorbidities including gastroesophageal reflux disease. Objective This study aimed to describe and compare oral and oropharyngeal sensory function measured using noninstrumental clinical methods in adults with COPD and healthy controls. Method Participants included 27 adults (18 men, nine women) with a diagnosis of COPD and a mean age of 66.56 years ( SD = 8.68). The control group comprised 11 healthy adults (five men, six women) with a mean age of 60.09 years ( SD = 11.57). Spirometry measures confirmed reduced functional expiratory volumes (% predicted) in the COPD patients compared to the control participants. All participants completed a case history interview and underwent clinical evaluation of oral and oropharyngeal sensation by a speech-language pathologist. The sensory evaluation explored the detection of tactile and temperature stimuli delivered by cotton swab to six locations in the oral cavity and two in the oropharynx as well as identification of the taste of stimuli administered in 5-ml boluses to the mouth. Analyses explored the frequencies of accurate responses regarding stimulus location, temperature and taste between groups, and between age groups (“≤ 65 years” and “> 65 years”) within the COPD cohort. Results We found significantly higher frequencies of reported use of inhaled medications ( p < .001) and xerostomia ( p = .003) in the COPD cohort. Oral cavity thermal sensation ( p = .009) was reduced in the COPD participants, and a significant age-related decline in gustatory sensation was found in the COPD group ( p = .018). Conclusion This study found that most of the measures of oral and oropharyngeal sensation remained intact in the COPD group. Oral thermal sensation was impaired in individuals with COPD, and reduced gustatory sensation was observed in the older COPD participants. Possible links between these results and the use of inhaled medication by individuals with COPD are discussed.

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