A shower spray facility for accurate control and rapid changes of skin temperature

1976 ◽  
Vol 40 (4) ◽  
pp. 641-643
Author(s):  
G. D. Callin
Keyword(s):  
Skin Temperature ◽  
Human Subjects ◽  
Periodic Wave ◽  
Temperature Changes ◽  
Step Functions ◽  
Rapid Changes ◽  
Wave Forms ◽  
The Subject ◽  
Average Skin ◽  
Preset Temperature

A shower spray facility (SSF) was built to closely clamp the skin temperature of human subjects, while retaining capability for controlled rapid changes. The subject is enclosed from the neck down in a small chamber containing three water spray manifolds which terminate in 64 small shower heads; the manifolds provide independent temperature control of left leg, right leg, and arm/torso. A dual, solenoid-switched plumbing system for each manifold allows rapid, preset temperature changes. Preliminary tests showed that single thermocouples can accurately indicate average skin temperature for each of the three controlled body areas. Initial experiments with spikes, step functions, and periodic wave forms have proven the SSF as a potentially powerful tool for studying mechanisms of human thermoregulation.

Adaptation of thermal pain in the skin

1962 ◽  
Vol 17 (4) ◽  
pp. 693-696 ◽  
Author(s):  
Leon C. Greene ◽  
James D. Hardy
Keyword(s):  
Thermal Radiation ◽  
Skin Temperature ◽  
Radiation Intensity ◽  
Pain Threshold ◽  
Human Subjects ◽  
Initial Period ◽  
Pain Thresholds ◽  
Thermal Pain ◽  
Cutaneous Pain ◽  
The Subject

Cutaneous pain thresholds were determined on blackened skin of foreheads and forearms of human subjects over areas of 16 cm2 by recording skin temperature during exposure to thermal radiation for periods up to 50 min. Intensity of stimulus was controlled by the subject so that threshold pain was maintained throughout the exposure. After the initial period of adjustment by the subject, radiation intensity was generally maintained constant although skin temperature for the pain threshold decreased from 44.9 C to 43.8 C. By using an intensity as low as 22 mcal/cm2/sec, threshold pain was evoked in 29 min at a skin temperature of 42.2 C. In both groups, once pain had been established it did not disappear. It is inferred from these observations that thermal pain does not adapt for near-threshold stimulation in the period between onset of pain at 30 sec and termination of stimulation. Submitted on December 26, 1961

Synchronized slow-amplitude modulations in the electromyograms of shivering muscles

1989 ◽  
Vol 66 (5) ◽  
pp. 2358-2363 ◽  
Author(s):  
D. J. Israel ◽  
R. S. Pozos
Keyword(s):  
Skin Temperature ◽  
Flow Rate ◽  
Visual Analysis ◽  
Human Subjects ◽  
Muscular Activity ◽  
Emg Activity ◽  
Temperature Changes ◽  
Relationship Of ◽  
The Relationship ◽  
Pearson Correlations

The electromyograms (EMG) of shivering human subjects exposed to 0 degrees C air in an environmental chamber were analyzed to detect slow-amplitude modulations (SAMs, less than 1 Hz) in the EMGs of widely separated muscles and to study the relationship of these SAMs to respiration rate and skin temperature. Distinct amplitude modulations were observed in the raw EMGs during shivering. The peaks in EMG activity occurred simultaneously in the majority of the monitored muscles in all subjects. Pearson correlations between the average rectified EMGs of 93% of the muscles were significant (P less than 0.05). Visual analysis of the EMG and respiration signals indicated that the peaks in muscular activity occurred 6–12 times/min, whereas respiration ranged from 10 to 23 cycles/min. For all subjects respiration was at a higher frequency than amplitude modulation in the EMG. Comparison of EMG records with expiratory flow rate traces in shivering subjects indicated no one-to-one correlation between the occurrence of respiration and EMG amplitude modulations. Respiratory flow rate and average rectified EMG showed significant correlation in only 33% of the cases. In addition, skin temperature changes could not be correlated with the SAMS.

Temperature control system for water-perfused suits

1977 ◽  
Vol 42 (4) ◽  
pp. 656-660 ◽  
Author(s):  
G. L. Brengelmann ◽  
M. McKeag ◽  
L. B. Rowell
Keyword(s):  
Water Temperature ◽  
Skin Temperature ◽  
Temperature Control ◽  
Cold Water ◽  
Human Subjects ◽  
Temperature Control System ◽  
Thermal Mass ◽  
Rates Of Change ◽  
Wave Forms ◽  
Control Skin

A system used to control skin temperature in human subjects wearing water-perfused garments is described, It supplies 8 l/min at 10 psi with water temperature controlled within +/-0.1 degree C. Temperature control is facilitated by a low circulating thermal mass and a fast responding heater based on a commercially available quartz heat lamp. The system is open so that hot or cold water can be added from the building mains to produce rates of change or water temperature exceeding 5 degrees C/min. These capabilities allow semiautomatic control of skin temperature within +/-1 degree C of desired wave forms. Potential hazards and associated safety devices are described.

Measuring Facial Skin Temperature Changes Caused by Mental Work-Load with Infrared Thermography

2016 ◽  
Vol 136 (11) ◽  
pp. 1581-1585 ◽  
Author(s):  
Tota Mizuno ◽  
Takeru Sakai ◽  
Shunsuke Kawazura ◽  
Hirotoshi Asano ◽  
Kota Akehi ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Infrared Thermography ◽  
Work Load ◽  
Facial Skin ◽  
Mental Work ◽  
Temperature Changes ◽  
Mental Work Load

scholarly journals Teaching Science in Today’s Society: The Case of Particle Physics for Primary Schools

Universe ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 169
Author(s):  
Cristina Lazzeroni ◽  
Sandra Malvezzi ◽  
Andrea Quadri
Keyword(s):  
Particle Physics ◽  
Primary Schools ◽  
Scientific Information ◽  
Decision Makers ◽  
Educational Institutions ◽  
The Public ◽  
The Past ◽  
Rapid Changes ◽  
The Subject ◽  
Ongoing Project

The rapid changes in science and technology witnessed in recent decades have significantly contributed to the arousal of the awareness by decision-makers and the public as a whole of the need to strengthen the connection between outreach activities of universities and research institutes and the activities of educational institutions, with a central role played by schools. While the relevance of the problem is nowadays unquestioned, no unique and fully satisfactory solution has been identified. In the present paper we would like to contribute to the discussion on the subject by reporting on an ongoing project aimed to teach Particle Physics in primary schools. We will start from the past and currently planned activities in this project in order to establish a broader framework to describe the conditions for the fruitful interplay between researchers and teachers. We will also emphasize some aspects related to the dissemination of outreach materials by research institutions, in order to promote the access and distribution of scientific information in a way suited to the different age of the target students.

scholarly journals Fertilisation rate obtained with frozen-thawed boar semen supplemented with rosmarinic acid using a single insemination timed according to vulvar skin temperature changes

2015 ◽  
Vol 63 (1) ◽  
pp. 100-109 ◽  
Author(s):  
Victoria Luño ◽  
Lydia Gil ◽  
Maite Olaciregui ◽  
Juan Grandía ◽  
Trinidad Ansó ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Artificial Insemination ◽  
Rosmarinic Acid ◽  
Intrauterine Insemination ◽  
Fertility Rates ◽  
Temperature Changes ◽  
Progressive Motility ◽  
A Value ◽  
Fertilisation Rate ◽  
Boar Semen

Artificial insemination (AI) of sows with frozen-thawed semen usually results in lower pregnancy rates and litter sizes than the use of liquid preserved semen. The present study evaluated the effectiveness of vulvar skin temperature changes as a predictor of ovulation in sows and determined the fertility rates obtained after AI with frozen-thawed semen supplemented with rosmarinic acid (RA). Semen was collected from mature boars and cryopreserved in experimental extenders supplemented with or without 105 μM of RA. Multiparous sows were inseminated with a single dose of semen when vulvar skin temperature decreased to a value below 35 °C. Intrauterine insemination was performed using 1.5 × 109 spermatozoa. The sows were slaughtered 48 h after AI and the embryos and oocytes were recovered from the oviducts. Total and progressive motility, viability and acrosome integrity were significantly (P < 0.05) higher in RA-supplemented semen samples compared with the control. Fertilisation occurred in all sows inseminated in the study, although there were no significant differences between the experimental groups. Sows inseminated with RA-supplemented semen showed a slight increase in the number of embryos recovered as compared to sows inseminated with control semen. In conclusion, insemination according to vulvar skin temperature changes resulted in successful fertilisation in all sows, although supplementation of the freezing media with RA did not improve the fertilising ability of frozen-thawed boar sperm.

A Conformable Two-Dimensional Resistance Temperature Detector for Measuring Average Skin Temperature

2021 ◽  
Author(s):  
Laura Namisnak ◽  
Sepideh Khoshnevis ◽  
Kenneth R. Diller
Keyword(s):  
Surface Temperature ◽  
Skin Temperature ◽  
Infrared Thermography ◽  
Single Point ◽  
Wearable Sensors ◽  
Two Dimensional ◽  
Nonuniform Temperature ◽  
Resistance Temperature Detector ◽  
Temperature Detector ◽  
Average Skin

Abstract Various medical procedures are accomplished by manipulating skin temperature in a nonuniform pattern. Skin temperature monitoring is essential to assess conformance to protocol specifications and to prevent thermal injury. Existing solutions for skin temperature monitoring include single point sensors, such as thermocouples, and two-dimensional methods of sensing surface temperature, such as infrared thermography, and wearable technology. Single point sensors cannot detect the average temperature and consequently their measurements cannot be representative of average surface temperature in a nonuniform temperature field. Infrared thermography requires optical access, and wearable sensors may require complex manufacturing processes and impede the heat exchange with a source by introducing a layer of insulation. Our solution is a two-dimensional resistance temperature detector (2D RTD) created by knitting copper magnet wire into custom shapes. The 2D RTDs were calibrated, compared to one-dimensional sensors and wearable sensors, and analyzed for hysteresis, repeatability, and surface area conformation. Resistance and temperature were correlated with an R2 of 0.99. The 2D RTD proved to be a superior device for measuring average skin temperature exposed to a nonuniform temperature boundary in the absence of optical access such as when a full body thermal control garment is worn.

Is There a Difference between the Effects of One-Point and Three-Point Indirect Moxibustion Stimulation on Skin Temperature Changes of the Posterior Trunk Surface?

2012 ◽  
Vol 30 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Hidetoshi Mori ◽  
Tim Hideaki Tanaka ◽  
Hiroshi Kuge ◽  
Ken Sasaki
Keyword(s):  
Skin Temperature ◽  
Single Point ◽  
Indirect Moxibustion ◽  
Thermal Stimulation ◽  
Acupuncture Points ◽  
Lumbar Region ◽  
Temperature Changes ◽  
Posterior Trunk ◽  
The One ◽  
Stimulation Group

Objective To determine whether any difference exists in responses to indirect moxibustion relative to thermal stimulation sites. Methods Twenty one healthy men of mean±SD age 22.5±6.1 years were randomly divided into two groups, one receiving a single moxibustion stimulation in three locations (the three-point stimulation group, n=10 participants) and the other receiving three stimulations in one location (the one-point stimulation group, n=11 participants). The thermal stimulation sites were GV14, GV9 and GV4 acupuncture points. A thermograph was used to obtain the skin temperature on the posterior trunks of the participants. To analyse skin temperature, four arbitrary frames (the scapular, interscapular, lumbar and vertebral regions) were made on the posterior trunk. Result An increase in skin temperature on the posterior trunk was observed following both one- and three-point moxibustion administrations. The skin temperature of the lumbar region showed a significant increase after three-point stimulation compared with single-point stimulation (p=0.011). There was also a significant increase in skin temperature of the spinal region after three-point stimulation compared with one-point stimulation (p=0.046). Conclusion Administration of single moxibustion doses on the GV14, GV9 and GV4 points produces greater changes in skin temperature than three applications of moxibustion to the GV14 point only.

Characteristics of wettedness under constant average skin temperature

1993 ◽  
Vol 18 (5-6) ◽  
pp. 449-454
Author(s):  
Tohru Mochida ◽  
Tetsumi Horikoshi
Keyword(s):  
Skin Temperature ◽  
Average Skin
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