Skin temperature increase as a fitness indicator for hand-mouse interface evaluation—A preliminary infrared camera study

2010 ◽  
pp. 301-306
Author(s):  
Hui-ju Lin ◽  
Yung-hui Lee ◽  
Wei-yu Chen
Keyword(s):  
Skin Temperature ◽  
Temperature Increase ◽  
Infrared Camera ◽  
Hand Mouse

Skin temperature increase caused by a mobile phone: A methodological infrared camera study

2005 ◽  
Vol 26 (6) ◽  
pp. 510-519 ◽  
Author(s):  
Aksel Straume ◽  
Gunnhild Oftedal ◽  
Anders Johnsson
Keyword(s):  
Mobile Phone ◽  
Skin Temperature ◽  
Temperature Increase ◽  
Infrared Camera

scholarly journals Dislocations Gliding Study by IR Thermography in C-Mn Steels with Different Solute Atoms Content in the Gigacycle Fatigue Domain

2015 ◽  
Vol 664 ◽  
pp. 177-187 ◽  
Author(s):  
Zhi Yong Huang ◽  
Nicolas Ranc ◽  
Danièle Wagner
Keyword(s):  
Temperature Increase ◽  
Aluminum Content ◽  
Infrared Camera ◽  
Fatigue Tests ◽  
Ir Thermography ◽  
Mechanical Spectroscopy ◽  
Carbon Manganese Steels ◽  
Solute Atoms ◽  
Manganese Steels ◽  
French Standard

Tests were performed on two Carbon-Manganese steels (A42 and A48 steels, French standard) in the gigacycle fatigue domain thanks to a piezoelectric fatigue machine working at 20000Hz. During the tests, temperature recordings were achieved by an infrared camera for various stress amplitudes. The main difference between the two steels compositions was the aluminum content (0.045% for the A42 steel and 0.004% for the A48 steel), and the carbon content (0.140% for the A 42 steel and 0.198% for the A48 steel). In the A48 steel, the few aluminum content induces a higher free content of solute nitrogen in the lattice. Mechanical spectroscopy tests were performed and gave qualitative results on the solute contents repartition in the lattice. The temperature increase recorded during the fatigue tests for the two steels are different at the beginning of the tests. The differences can be explained by the different repartition of the solute atoms which induces a different dislocation gliding between the two materials. At the end of the tests, the thermal recordings are similar and attributed to the evolution of the solute atoms repartition and the dislocation structure.

Thermography as a Means of Blood Perfusion Measurement

1979 ◽  
Vol 101 (4) ◽  
pp. 246-249 ◽  
Author(s):  
J. E. Francis ◽  
R. Roggli ◽  
T. J. Love ◽  
C. P. Robinson
Keyword(s):  
Blood Flow ◽  
Skin Temperature ◽  
Strain Gage ◽  
Infrared Camera ◽  
Blood Perfusion ◽  
The Body ◽  
Perfusion Rate ◽  
Perfusion Measurement ◽  
Blood Perfusion Rate ◽  
Human Forearm

The scanning infrared camera has been used to verify an analytical model relating blood perfusion rate to skin temperature. The blood perfusion rates were measured with both the mercury strain gage and the volume plethysmograph on the human forearm. Thermograms were taken of the forearm and temperature measured using an optical densitometer. Comparison of the volume plethysmograph with the strain gage, and the thermograms with the strain gage indicate thermography to be a useful means of measuring blood flow. Thermography has the advantages of being noninvasive and can be used to measure blood perfusion in parts of the body not easily monitored with occlusive techniques.

The relation between skin temperature increase and sensory block height in spinal anaesthesia using infrared thermography

2010 ◽  
Vol 54 (9) ◽  
pp. 1105-1110 ◽  
Author(s):  
F. G. A. M. Van HAREN ◽  
J. J. DRIESSEN ◽  
L. KADIC ◽  
J. Van EGMOND ◽  
L. H. D. J. BOOIJ ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Infrared Thermography ◽  
Spinal Anaesthesia ◽  
Temperature Increase ◽  
Sensory Block ◽  
Block Height

A High-Resolution Voxel Model for Predicting Local Tissue Temperatures in Humans Subjected to Warm and Hot Environments

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
D. A. Nelson ◽  
S. Charbonnel ◽  
A. R. Curran ◽  
E. A. Marttila ◽  
D. Fiala ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Core Temperature ◽  
Spatial Resolution ◽  
Rectal Temperature ◽  
Environmental Conditions ◽  
Temperature Increase ◽  
High Spatial Resolution ◽  
Compartment Model ◽  
Voxel Model ◽  
Hot Environments

This work describes and presents results from a new three-dimensional whole-body model of human thermoregulation. The model has been implemented using a version of the “Brooks Man” anatomical data set, consisting of 1.3×108 cubic volume elements (voxels) measuring 0.2 cm/side. The model simulates thermoregulation through passive mechanisms (metabolism, blood flow, respiration, and transpiration) and active mechanisms (vasodilatation, vasoconstriction, sweating, and shivering). Compared with lumped or compartment models, a voxel model is capable of high spatial resolution and can capture a level of anatomical detail not achievable otherwise. A high spatial resolution model can predict detailed heating patterns from localized or nonuniform heating patterns, such as from some radio frequency sources. Exposures to warm and hot environments (ambient temperatures of 33–48°C) were simulated with the current voxel model and with a recent compartment model. Results from the two models (core temperature, skin temperature, metabolic rate, and evaporative cooling rate) were compared with published experimental results obtained under similar conditions. Under the most severe environmental conditions considered (47.8°C, 27% RH for 2 h), the voxel model predicted a rectal temperature increase of 0.56°C, compared with a core temperature increase of 0.45°C from the compartment model and an experimental mean rectal temperature increase of 0.6°C. Similar, good agreement was noted for other thermal variables and under other environmental conditions. Results suggest that the voxel model is capable of predicting temperature response (core temperature and skin temperature) to certain warm or hot environments, with accuracy comparable to that of a compartment model. In addition, the voxel model is able to predict internal tissue temperatures and surface temperatures, over time, with a level of specificity and spatial resolution not achievable with compartment models. The development of voxel models and related computational tools may be useful for thermal dosimetry applications involving mild temperature hyperthermia and for the assessment of safe exposure to certain nonionizing radiation sources.

scholarly journals Infrared assessment of human facial temperature in the presence and absence of common cosmetics

2020 ◽  
Author(s):  
Kaikai Zheng ◽  
Ruoyu Dong ◽  
Huan Wang ◽  
Steve Granick
Keyword(s):  
Skin Temperature ◽  
Human Subjects ◽  
Infrared Camera ◽  
Temperature Sensing ◽  
Laboratory Setting ◽  
Cosmetic Products ◽  
Research Grade ◽  
Presence And Absence ◽  
Volatile Liquids

ABSTRACTUsing a sensitive research-grade infrared camera, we find that common facial cosmetics and lotions mask skin temperature in assays of the human forehead. We test a family of 10 commonly-used cosmetic products and find that volatile liquids and creams lower thermal skin temperature by at least 2 C for up to 5-10 min and at least 1 C for up to 20 min, respectively. Powder and cream that contains brightening agent lower indefinitely the skin temperature sensed by infrared camera. With the qualification that these experiments were performed in a controlled laboratory setting rather than the mass crowd screening environment where infrared temperature sensing of humans sees widespread use, our tests suggest that for human subjects whose face was treated with certain cosmetics and lotions, infrared-based screening for elevated facial temperature (fever) can be unreliable.

scholarly journals UAV-BORNE THERMAL IMAGING FOR FOREST HEALTH MONITORING: DETECTION OF DISEASE-INDUCED CANOPY TEMPERATURE INCREASE

2015 ◽  
Vol XL-3/W3 ◽  
pp. 349-354 ◽  
Author(s):  
M. Smigaj ◽  
R. Gaulton ◽  
S. L. Barr ◽  
J. C. Suárez
Keyword(s):  
Temperature Rise ◽  
Temperature Increase ◽  
Disease Onset ◽  
Forest Health ◽  
Significant Risk ◽  
Canopy Temperature ◽  
Infrared Camera ◽  
Major Influence ◽  
Data Set ◽  
Management Interventions

Climate change has a major influence on forest health and growth, by indirectly affecting the distribution and abundance of forest pathogens, as well as the severity of tree diseases. Temperature rise and changes in precipitation may also allow the ranges of some species to expand, resulting in the introduction of non-native invasive species, which pose a significant risk to forests worldwide. The detection and robust monitoring of affected forest stands is therefore crucial for allowing management interventions to reduce the spread of infections. <br><br> This paper investigates the use of a low-cost fixed-wing UAV-borne thermal system for monitoring disease-induced canopy temperature rise. Initially, camera calibration was performed revealing a significant overestimation (by over 1 K) of the temperature readings and a non-uniformity (exceeding 1 K) across the imagery. These effects have been minimised with a two-point calibration technique ensuring the offsets of mean image temperature readings from blackbody temperature did not exceed ± 0.23 K, whilst 95.4% of all the image pixels fell within ± 0.14 K (average) of mean temperature reading. <br><br> The derived calibration parameters were applied to a test data set of UAV-borne imagery acquired over a Scots pine stand, representing a range of Red Band Needle Blight infection levels. At canopy level, the comparison of tree crown temperature recorded by a UAV-borne infrared camera suggests a small temperature increase related to disease progression (R = 0.527, p = 0.001); indicating that UAV-borne cameras might be able to detect sub-degree temperature differences induced by disease onset.

Temperature and creatine kinase changes during a 10-day taper period in sprinters

2021 ◽  
Author(s):  
Paweł Korman ◽  
Krzysztof Kusy ◽  
Adam Kantanista ◽  
Anna Straburzynska-Lupa ◽  
Jacek Zielinski
Keyword(s):  
Creatine Kinase ◽  
Circadian Rhythm ◽  
Skin Temperature ◽  
Infrared Camera ◽  
The Body ◽  
Base Temperature ◽  
Power Training ◽  
Progressive Reduction ◽  
Training Camp ◽  
Temperature Levels

Abstract Objective.The aim of this prospective cohort study, performed during a 10-day training camp, was to analyze the effect of a series of successive speed-power training sessions on the concurrent circadian changes in resting leg skin temperature and blood creatine kinase (CK) levels and to determine the correlation between them. Approach. Seventeen elite sprinters, aged 22‒31 years, were examined. Every morning and evening, capillary blood samples were drawn to assay CK levels. Lower limb skin temperature was measured simultaneously, and thermal images were taken using an infrared camera. Main results. From the first day of the training camp, the base temperature levels began to drop to obtain a significant reduction from the 6th day (male) and from the 8th day (female) to the end of the camp . Simultaneously, CK levels increased in the male group from 8th to the end of the camp, but it did not change significantly in females. Regarding the circadian rhythm, the CK levels always rose during the day and declined during the night. The temperature decreased during the day and increased during the night until the 6th day. After that, the temperature changed oppositely till the end of camp, i.e. it increased during the day and decreased during the night. This could suggest that the training microcycle should last about a week because after this time there may be a disturbance in the temperature circadian rhythm and a significant CK accumulation Significance. Multi-day speed-power training induced a progressive reduction in resting skin temperature and an elevation in CK levels. It also altered the circadian rhythm of the body skin temperature, which may indicate that after about 6 days of regular exercise, physiological deregulation may occur.

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