Novel Method for Recording High Frequency Human Skin Temperature Oscillations

2019 ◽  
Author(s):  
Nikolai Suvorov ◽  
Alexander Belov ◽  
Timofey Sergeev ◽  
Konstantin Kuliabin ◽  
Aleksei Anisimov
Keyword(s):  
Skin Temperature ◽  
Human Skin ◽  
High Frequency ◽  
Temperature Oscillations ◽  
Novel Method

scholarly journals High Precision Human Skin Temperature Fluctuations Measuring Instrument

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4101
Author(s):  
Nikolai B. Suvorov ◽  
Alexander V. Belov ◽  
Konstantin G. Kuliabin ◽  
Aleksei A. Anisimov ◽  
Timofei V. Sergeev ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Human Skin ◽  
High Precision ◽  
Temperature Fluctuations ◽  
Preliminary Test ◽  
Semiconductor Diode ◽  
Measuring Instrument ◽  
Voltage Range ◽  
Temperature Oscillations ◽  
Depth Study

This paper describes the experimental results of testing a prototype of a high precision human skin rapid temperature fluctuations measuring instrument. Based on the author’s work, an original circuit solution on a miniature semiconductor diode sensor has been designed. The proposed circuitry provides operation in the full voltage range with automatic setting and holding the operating point, as well as the necessary slope of the conversion coefficient (up to 2300 mV/°C), which makes it possible to register fast temperature oscillations from the surface of the human body and other biological objects. Simulation results in the Microcap 12 software and laboratory tests have confirmed all declared design specifications: temperature resolution of 0.01 °C, transducer thermal time constant of 0.05 s. An original thermostat and an experimental setup for the simultaneous registration of the electrocardiogram, pulse wave signals from the Biopac polygraph MP36 and a signal of temperature oscillations from the prototype thermometer have been designed for further investigations. The preliminary test results indicates that using the designed measuring instrument gives a possibility to provide an in-depth study of the relationship between micro- and macro-blood circulations manifested in skin temperature fluctuations.

scholarly journals Creation of Ionically Crosslinked Tri-Layered Chitosan Membranes to Simulate Different Human Skin Properties

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1807
Author(s):  
Rocío Guerle-Cavero ◽  
Blanca Lleal-Fontàs ◽  
Albert Balfagón-Costa
Keyword(s):  
Elastic Modulus ◽  
Human Skin ◽  
Sodium Tripolyphosphate ◽  
Snow Crab ◽  
Suitable Material ◽  
Cosmetic Industry ◽  
Novel Method ◽  
Current Article ◽  
Chitosan Membranes

In 2023, new legislation will ban the use of animals in the cosmetic industry worldwide. This fact, together with ethical considerations concerning the use of animals or humans in scientific research, highlights the need to propose new alternatives for replacing their use. The aim of this study is to create a tri-layered chitosan membrane ionically crosslinked with sodium tripolyphosphate (TPP) in order to simulate the number of layers in human skin. The current article highlights the creation of a membrane where pores were induced by a novel method. Swelling index, pore creation, and mechanical property measurements revealed that the swelling index of chitosan membranes decreased and, their pore formation and elasticity increased with an increase in the Deacetylation Grade (DDA). Additionally, the results demonstrate that chitosan’s origin can influence the elastic modulus value and reproducibility, with higher values being obtained with seashell than snow crab or shrimp shells. Furthermore, the data show that the addition of each layer, until reaching three layers, increases the elastic modulus. Moreover, if layers are crosslinked, the elastic modulus increases to a much greater extent. The characterization of three kinds of chitosan membranes was performed to find the most suitable material for studying different human skin properties.

Real-Time High-Frequency Impedance Monitoring of Human Skin Through Magnetic Coupling

2017 ◽  
Vol 17 (19) ◽  
pp. 6167-6174
Author(s):  
Didem Tekgun ◽  
Wasi Uddin ◽  
Kye-Shin Lee ◽  
Yilmaz Sozer
Keyword(s):  
Real Time ◽  
Human Skin ◽  
High Frequency ◽  
Magnetic Coupling ◽  
Impedance Monitoring

scholarly journals Prediction human skin temperature in comfort level

2019 ◽  
Vol 1 (3) ◽  
pp. 1-4
Author(s):  
Zaina Norhallis Zainol ◽  
Masine Md. Tap ◽  
Haslinda Mohamed Kamar
Keyword(s):  
Thermal Comfort ◽  
Skin Temperature ◽  
Human Skin ◽  
Blood Perfusion ◽  
Comfort Level ◽  
Working Environment ◽  
Percentage Error ◽  
Bioheat Equation ◽  
Acceptable Error ◽  
Human Arm

Thermal comfort is the human subject perceive satisfaction to the work environment. The thermal comfort need to be achieve towards productive working environment. The comfort level of the subject is affected by the human skin temperature. To assess the skin temperature with the sorrounding by conducting human experiment in the climatic chamber. It is rigorous and complex experiment.This study was developed to predict human skin temperature in comfort level with the finite element method and the bioheat equation. The bioheat equation is a consideration of metabolic heat generation and the blood perfusion to solve heat transfer of the living tissue. It is to determine the skin temperature focussing at the human arm. From the study, it is found that the predicted skin temperature value were in well agreement with the experimental results. The percentage error insignificant with acceptable error of 1.05%.

scholarly journals Decay time characteristics of La_2O_2S:Eu and La_2O_2S:Tb for use within an optical sensor for human skin temperature measurement

2008 ◽  
Vol 47 (27) ◽  
pp. 4895 ◽  
Author(s):  
Sook Voon Yap ◽  
Robert M. Ranson ◽  
Wayne M. Cranton ◽  
Demosthenes Koutsogeorgis
Keyword(s):  
Temperature Measurement ◽  
Skin Temperature ◽  
Human Skin ◽  
Decay Time ◽  
Optical Sensor

scholarly journals High-frequency electric welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery

2014 ◽  
Vol 252 (11) ◽  
pp. 1697-1703 ◽  
Author(s):  
Nicolay Umanets ◽  
Natalya V. Pasyechnikova ◽  
Vladimir A. Naumenko ◽  
Paul B. Henrich
Keyword(s):  
High Frequency ◽  
Vitreoretinal Surgery ◽  
Electric Welding ◽  
Novel Method

An Optical Fiber-Based Data-Driven Method for Human Skin Temperature 3-D Mapping

2019 ◽  
Vol 23 (3) ◽  
pp. 1141-1150 ◽  
Author(s):  
Weixing Liu ◽  
Dagong Jia ◽  
Jing Zhao ◽  
Hongxia Zhang ◽  
Tiegen Liu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Skin Temperature ◽  
Human Skin ◽  
Data Driven
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