Article Title

Difference of Human Kinetic Frequency on Mattress by Fourier Transform


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Background: The new science which examines the life in energy and frequency by quantum life science is noticed. Mattresses of various concepts are used on beds which are always installed in hospitals and facilities. It has been reported that human beings constantly roll over and vibrate in minute detail against the gravity, even at night, and it can be said that motion dynamics are necessary life activity as long as human beings live as living organisms. Therefore, it may be important as life observation to analyze not only physical aspects such as the body, bed and mattress, but also physical aspects such as kinematic and dynamic energy, force, speed and time, when examining human health and the medical treatment environment for life. However, few studies have examined the kinematic effects and differences of mattresses. The quality of a mattress affects the health of the patient or user using it in the short and long term. The choice of mattress and its cost are also important factors in hospital and facility management. In this study, we examined the differences of movement frequencies that human produce on the different mattresses. Methods: Healthy volunteers were recruited by a snowball sampling. The movement from the supine position to the sitting position on Air-based Mattress, Middle Hardees Urethane Mattress, and High hardness Urethane Mattress were repeated for three times. The three procedure was analyzed with a 12 segments model using a 3D motion analysis Move Tr 3D (Library©) under the 4 CCD cameras. The analysis of the velocity and acceleration data were performed by Fourier Transform (IDL). The sensory test for sleeping comfort revised was investigated after the third time. The mathematical expressions to be physically examined from the data of this study were also examined. Results: Five healthy volunteers (Medium age 31 years, Female) who received written consent to the study were investigated. Air mattress took longer time to be head up than both urethane mattresses. The velocity changes of both Medium Hardness and High Hardness Urethan mattresses were similar. Air mattress had a high frequency in the vicinity around 3 sec after the movement beginning. There was no difference in the frequency of the head acceleration between two mattresses and the high frequency was strong until coming to the head up. Conclusion: The difference in the human kinetic frequency using Fourier Transform suggests that there is a difference in the frequency produced by humans moving on different mattresses.

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