A research on relevance between photoplethysmography signal and perceptual stimulation

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040129
Author(s):  
Chih-Hsueh Lin ◽  
Zhi-Hao Wang ◽  
Gwo-Jia Jong

In this paper, the Photoplethysmography (PPG) signal response of humans under different perceptual stimuli was mainly discussed. The autonomic nervous system (ANS) regulates the functioning of organs or tissues in the body to make the body adapt to the environment. When the human body is stimulated, it can obtain information about ANS from the analysis results of heart rate variability (HRV).The proposed method is used with PPG signals for time domain and frequency domain analysis to obtain HRV parameters and short-time Fourier transform (STFT) output heat map, respectively. Different environmental stimuli were given during the experiment and changes in PPG signals were observed. There were eight males and eight females with a total of 16 subjects with an average age of 24 years. Heart rate was observed to vary with stimulation in 16 subjects. The heat map clearly distinguishes whether the subject is affected by the stimulus and causes the ANS to regulate the human body. The data obtained under various stimuli are directly compared and measured from physiological signals. It can establish an objective patient’s current emotional judgment and can be used to explore the patient’s diagnosis status during the diagnosis process.

Author(s):  
Cristóbal Pera

ABSTRACTIf the human body is really a fabric, should surgeons be considered architects, as some surgeons describe themselves today? The author raises and analyzes this question, and he concludes that vsurgeons cannot be considered as such: the architect is the creator of his work —fabric or building—, but the surgeon is not the creator of this complex biological fabric —vulnerable and subject to deterioration and with an expiration date— which is the human body. This body is the object upon which his hands and instruments operate. The surgeon cures and heals wounds, immobilizes and aligns fractured bones in order to facilitate their good and timely repair, and cuts open the body’s surface in order to reach its internal organs. He also explores the body with his hands or instruments, destroys and reconstructs its ailing parts, substitutes vital organs taken from a donor’s foreign body, designs devices or prostheses, and replaces body parts, such as arteries and joints, that are damaged or worn out. In today’s culture, dominated by the desire to perfect the body, other surgeons keep retouching its aging façade, looking for an iconic and timeless beauty. This longing can drive, sometimes, to surgical madness. The surgeon is not capable of putting into motion, from scratch, a biological fabric such as the human body. Thus, he can’t create the subject of his work in the way that an architect can create a building. In contrast, the surgeon restores the body’s deteriorated or damaged parts and modifies the appearance of the body’s façade.RESUMEN¿Si el cuerpo humano fuera realmente una fábrica, podría el cirujano ser considerado su arquitecto, como algunos se pregonan en estos tiempos? Esta es la cuestión planteada por el autor y, a tenor de lo discurrido, su respuesta es negativa: porque así como el arquitecto es el artífice de su obra —fábrica o edificio— el cirujano no es el artífice de la complejísima fábrica biológica —vulnerable, deteriorable y caducable— que es el cuerpo humano, la cual le es dada como objeto de las acciones de sus manos y de sus instrumentos. El cirujano cura y restaña sus heridas, alinea e inmoviliza sus huesos fracturados para que su reparación llegue a buen término, penetra por sus orificios naturales o dibuja sobre la superficie corporal incisiones que le permitan llegar a sus entrañas, las explora con sus manos o mediante instrumentos, destruye y reconstruye sus partes enfermas, sustituye órganos vitales que no le ayudan a vivir por los extraídos de cuerpos donantes, y concibe, diseña y hace fabricar artefactos o prótesis, como recambio fragmentos corporales deteriorados o desgastados, como arterias o articulaciones. Otros cirujanos, en la predominante cultura de la modificación del cuerpo, retocan una y otra vez su fachada envejecida ineludiblemente por el paso del tiempo, empeñados en la búsqueda incesante de una belleza icónica y mediática e intemporal, una pretensión que puede conducir, y a veces conduce, al desvarío quirúrgico. En definitiva, el cirujano es incapaz de poner de pie, ex novo, una fábrica biológica como la del cuerpo humano y, por lo tanto, no puede ser su artífice, como lo es el arquitecto de su edificio. A lo sumo, es el restaurador de sus entrañas deterioradas y el modificador de su fachada, de su apariencia.


2018 ◽  
Vol 63 (7) ◽  
pp. 29-36
Author(s):  
Thuy Chung Thi

Human body is the basement for people’s existence. All human consciousness seems to be resulted from their body. It is regarded as a subject that involved in all human activities and created thoughts as well as human values. Although through Nguyen Duy’s writing career, the poet didn’t intend to use body’s language as one of means of expression. However, the body marked a deep impression in his poetry showing the fundaments of his ideas and feelings of the subject. The language of the body in his poems tended to point out some important issues such as the origin of the body, the body in wars, and the body in poverty.


2018 ◽  
pp. 177-190
Author(s):  
Thomas Nail

This chapter argues that the spatial description of being first emerged as historically dominant in the mythology and mythograms of prehistoric and Neolithic peoples, but at the same time was also inscribed on the body of the speaker of those same mythologies through speech. Therefore, the mythological description of being as space also presupposes a kinetic and historical transformation of the human body into a speaking body. The kinetic structure of this new surface of inscription is the subject of the present chapter. The thesis that follows is that the historical coemergence of spatial mythologies explored in the previous chapter and the new kinographic technology of speech follow the same dominantly centripetal field of motion during this time.


2012 ◽  
Vol 500 ◽  
pp. 325-329
Author(s):  
Guo Hua Lu ◽  
Fang Yang ◽  
Xi Jing Jing ◽  
Xiao Yu ◽  
Hua Wang ◽  
...  

Measures of heart rate are widely used to assess the health state of human in clinic. Tranditional method uses eletrodes touching the body to monitor electrocardiography (ECG) .A micorwave sensor was disscused to remote sense the heart rate without touching human body. Comparison of heart rate derived from the microwave sensor and ECG demonstrated that there were no significant differences, which suggested this sensor may prove a practical alternative to ECG for heart rate measurement.


2007 ◽  
Vol 35 (3) ◽  
pp. 371-382 ◽  
Author(s):  
Radhika Rao

The legal status of the human body is hotly contested, yet the law of the body remains in a state of confusion and chaos. Sometimes the body is treated as an object of property, sometimes it is dealt with under the rubric of contract, and sometimes it is not conceived as property at all, but rather as the subject of privacy rights. Which body of law should become the law of the body? This question is even more pressing in the context of current biomedical research, which permits commodification and commercialization of the body by everyone except the person who provides the “raw materials.” The lack of property protection for tangible parts of the human body is in stark contrast to the extensive protection granted to intellectual property in the body in the form of patents upon human genes and cell lines. Moreover, even courts that reject ownership claims on the part of those who supply body parts appear willing to grant property rights to scientists, universities, and others who use those body parts to conduct research and create products.


PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242147
Author(s):  
Emily M. Wong ◽  
Fern Tablin ◽  
Edward S. Schelegle

The aim of time-varying heart rate variability spectral analysis is to detect and quantify changes in the heart rate variability spectrum components during nonstationary events. Of the methods available, the nonparametric short-time Fourier Transform and parametric time-varying autoregressive modeling are the most commonly employed. The current study (1) compares short-time Fourier Transform and autoregressive modeling methods influence on heart rate variability spectral characteristics over time and during an experimental ozone exposure in mature adult spontaneously hypertensive rats, (2) evaluates the agreement between short-time Fourier Transform and autoregressive modeling method results, and (3) describes the advantages and disadvantages of each method. Although similar trends were detected during ozone exposure, statistical comparisons identified significant differences between short-time Fourier Transform and autoregressive modeling analysis results. Significant differences were observed between methods for LF power (p ≤ 0.014); HF power (p ≤ 0.011); total power (p ≤ 0.027); and normalized HF power (p = 0.05). Furthermore, inconsistencies between exposure-related observations accentuated the lack of agreement between short-time Fourier Transform and autoregressive modeling overall. Thus, the short-time Fourier Transform and autoregressive modeling methods for time-varying heart rate variability analysis could not be considered interchangeable for evaluations with or without interventions that are known to affect cardio-autonomic activity.


Author(s):  
Zongkai Liu ◽  
Chuan Peng ◽  
Xiaoqiang Yang

The measured uniaxial-head load spectrum in the road simulation test has a large number of useless small loads. When applying the measured load spectrum directly, it will take a lot of time. This paper designs a comprehensive road spectrum measurement system to collect data and proposes a method for editing the uniaxial-head acceleration load spectrum using short-time Fourier transform to speed up the reliability test process and reduce time costs. In this method, the time domain and frequency domain information of the signal is obtained by short-time Fourier transform. The concept of accumulated power spectral density is proposed to identify the reduced load data, and the relative fatigue damage is used as the pass criterion. The length of the edited spectrum is only 66% of the original spectrum through the above-mentioned editing method and retains the relative damage amount of 91%. Finally, through the analysis of time domain, frequency domain, and fatigue statistical parameters, it demonstrates that the short-time Fourier transform–based acceleration load spectrum edition method could achieve a similar fatigue damage to the original spectrum in a shorter time.


2019 ◽  
Vol 6 (1) ◽  
pp. 14-18
Author(s):  
Ahmad Sabiq ◽  
Nova Eka Diana ◽  
Debita Febriana

A cozy room should adjust its environment based on the condition of its occupants since it will indirectly affect the moods and body conditions of people inside. This study aims to develop a system for monitoring the human body condition using paired sensors on the Arduino Lilypad. The system will send the sensors data to the Raspberry Pi3 via Bluetooth to automatically control the electronic device inside the room based on the occupant body condition. The developed system will automatically turn on or turn off the electronic device when the body temperature or the heart rate is higher than the specified threshold value. Keywords: Lilypad, Raspberry, body sensor


2015 ◽  
Vol 6 (9) ◽  
pp. 641 ◽  
Author(s):  
Deepak Sharma ◽  
Bishnu Hari Paudel ◽  
Rita Khadka ◽  
Dilip Thakur ◽  
Niraj Khatri Sapkota ◽  
...  

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