scholarly journals Human body heat for powering wearable devices: From thermal energy to application

2017 ◽  
Vol 131 ◽  
pp. 44-54 ◽  
Author(s):  
Moritz Thielen ◽  
Lukas Sigrist ◽  
Michele Magno ◽  
Christofer Hierold ◽  
Luca Benini
Keyword(s):  
Thermal Energy ◽  
Human Body ◽  
Wearable Devices ◽  
Body Heat

scholarly journals Cell Thermoregulation: Reality or just a logical Construction?

2019 ◽  
pp. 65-74
Author(s):  
AI Ibraimov
Keyword(s):  
Thermal Energy ◽  
Human Body ◽  
Heat Conductivity ◽  
Condensed Chromatin ◽  
Indirect Methods ◽  
Logical Construction ◽  
Material Basis ◽  
Rational Explanation ◽  
Shed Light ◽  
Body Heat

The existence of biological thermoregulation at the molecular and organism (physiological organ-based system of thermoregulation) levels is well known. The possibility of thermoregulation at the level of individual cells is discussed. By cell thermoregulation (CT) is meant the elimination of the temperature difference between the nucleus and cytoplasm, when, for one reason or another, the level of thermal energy in the nucleus becomes higher than of the cytoplasm. The CT hypothesis can shed light on some scattered facts and observations, known in different areas of biology and medicine, but without rational explanation. It is assumed that CT originated from the evolution of ncDNAs in the eukaryotic genome, and its material basis is condensed chromatin. Although the CT hypothesis has not yet been directly experimentally confirmed, nevertheless, its existence can be determined by indirect methods at the organism level. Keywords: Cell thermoregulation; Condensed chromatin; Chromosomal heterochromatin regions; Human body heat conductivity

High-Performance Apparel and Wearable Devices for Hot Environments

2019 ◽  
Vol 10 (1) ◽  
pp. 1-14
Author(s):  
Radostina A. Angelova
Keyword(s):  
Human Body ◽  
High Performance ◽  
Heat Dissipation ◽  
Wearable Devices ◽  
The Body ◽  
Hot Environment ◽  
Active Protection ◽  
Thermoregulatory System ◽  
Hot Environments ◽  
Body Heat

Smart and intelligent textiles together with wearable devices for cooling the human body assure active protection of the human body in a hot environment. The purpose of this article is to present the recent inventions in the field of wearable technologies and high-performance apparel that helps the thermophysiological comfort of people in high-temperature environments. The work of the thermoregulatory system when the body heat storage is higher than the heat dissipation from the body to the environment is presented together with experimental results from thermograms during physical exercise. High-performance textiles, used in sports apparel, are analyzed in terms of their ability to cool the human body during high metabolic activity. Wearable devices for helping the thermophysiological comfort in the hot are also discussed.

A Human Body Heat Driven High Throughput Thermal Energy Harvesting Single Stage Regulator for Wearable Biomedical IoT Nodes

2018 ◽  
Vol 5 (6) ◽  
pp. 4989-5001 ◽  
Author(s):  
Priya V ◽  
Murali K Rajendran ◽  
Shourya Kansal ◽  
Gajendranath Chowdary ◽  
Ashudeb Dutta
Keyword(s):  
Energy Harvesting ◽  
High Throughput ◽  
Thermal Energy ◽  
Human Body ◽  
Single Stage ◽  
Thermal Energy Harvesting ◽  
Body Heat

Enabling Batteryless Wearable Devices by Transferring Power Through The Human Body

2021 ◽  
Vol 24 (3) ◽  
pp. 30-34
Author(s):  
Rishi Shukla ◽  
Neev Kiran ◽  
Rui Wang ◽  
Jeremy Gummeson ◽  
Sunghoon Ivan Lee
Keyword(s):  
Energy Source ◽  
Low Power ◽  
Human Body ◽  
Wearable Sensors ◽  
Primary Energy ◽  
Wearable Devices ◽  
Ultra Low Power ◽  
The Past ◽  
Key Barrier

Over the past few decades, we have witnessed tremendous advancements in semiconductor and MEMS technologies, leading to the proliferation of ultra-miniaturized and ultra-low-power (in micro-watt ranges) wearable devices for wellness and healthcare [1]. Most of these wearable sensors are battery powered for their operation. The use of an on-device battery as the primary energy source poses a number of challenges that serve as the key barrier to the development of novel wearable applications and the widespread use of numerous, seamless wearable sensors [5].

scholarly journals Acceleration Feature Extraction of Human Body Based on Wearable Devices

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 924
Author(s):  
Zhenzhen Huang ◽  
Qiang Niu ◽  
Ilsun You ◽  
Giovanni Pau
Keyword(s):  
Genetic Algorithm ◽  
Feature Extraction ◽  
Kalman Filter ◽  
Human Body ◽  
Wearable Devices ◽  
Human Motion ◽  
Data Set ◽  
Feature Extraction Method ◽  
Motion Data ◽  
Kalman Filter Algorithm

Wearable devices used for human body monitoring has broad applications in smart home, sports, security and other fields. Wearable devices provide an extremely convenient way to collect a large amount of human motion data. In this paper, the human body acceleration feature extraction method based on wearable devices is studied. Firstly, Butterworth filter is used to filter the data. Then, in order to ensure the extracted feature value more accurately, it is necessary to remove the abnormal data in the source. This paper combines Kalman filter algorithm with a genetic algorithm and use the genetic algorithm to code the parameters of the Kalman filter algorithm. We use Standard Deviation (SD), Interval of Peaks (IoP) and Difference between Adjacent Peaks and Troughs (DAPT) to analyze seven kinds of acceleration. At last, SisFall data set, which is a globally available data set for study and experiments, is used for experiments to verify the effectiveness of our method. Based on simulation results, we can conclude that our method can distinguish different activity clearly.

Hybrid dual-function thermal energy harvesting & storage technologies: towards self-chargeable flexible/wearable devices

2021 ◽  
Author(s):  
Joana S Teixeira ◽  
Rui S Costa ◽  
Ana Pires ◽  
Andre M Pereira ◽  
Clara Pereira
Keyword(s):  
Climate Change ◽  
Energy Harvesting ◽  
Thermal Energy ◽  
Wearable Devices ◽  
Energy Sources ◽  
Dual Function ◽  
Global Awareness ◽  
Thermal Energy Harvesting ◽  
Mitigate Climate Change ◽  
Storage Technologies

The worldwide energy scarcity arising from the massive consumption of nonrenewable energy sources raised a global awareness on the need for cleaner and affordable energy solutions to mitigate climate change...

Feasibility Analysis of Thermal Energy Recovery for the Shanghai Railway Station

2011 ◽  
Vol 317-319 ◽  
pp. 2289-2292
Author(s):  
Zheng Ming Tong ◽  
Shu Jun Liang
Keyword(s):  
Environmental Protection ◽  
Thermal Energy ◽  
Human Body ◽  
Energy Recovery ◽  
Heat Energy ◽  
Feasibility Analysis ◽  
Railway Station ◽  
Financial Capacity ◽  
Factory Production ◽  
New Perspective

In recent years, China has focused on the research of energy reuse and environmental protection with lots of manpower and financial capacity. And we have already gotten results on many aspects from transportation to factory production. In this paper, we will think about energy reuse from a new perspective: recovery and reuse of heat energy of human body. This paper researches and analyses the feasibility of thermal energy recovery for the shanghai railway station.

scholarly journals Compact and Low-Profile UWB Antenna Based on Graphene-Assembled Films for Wearable Applications

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2552 ◽  
Author(s):  
Ran Fang ◽  
Rongguo Song ◽  
Xin Zhao ◽  
Zhe Wang ◽  
Wei Qian ◽  
...  
Keyword(s):  
Human Body ◽  
Coplanar Waveguide ◽  
Wearable Devices ◽  
Impedance Bandwidth ◽  
Body Measurements ◽  
Uwb Antenna ◽  
Wearable Antennas ◽  
Low Profile ◽  
Close Proximity ◽  
Feeding Structure

In this article, a graphene-assembled film (GAF)-based compact and low-profile ultra-wide bandwidth (UWB) antenna is presented and tested for wearable applications. The highly conductive GAFs (~106 S/m) together with the flexible ceramic substrate ensure the flexibility and robustness of the antenna, which are two main challenges in designing wearable antennas. Two H-shaped slots are introduced on a coplanar-waveguide (CPW) feeding structure to adjust the current distribution and thus improve the antenna bandwidth. The compact GAF antenna with dimensions of 32 × 52 × 0.28 mm3 provides an impedance bandwidth of 60% (4.3–8.0 GHz) in simulation. The UWB characteristics are further confirmed by on-body measurements and show a bending insensitive bandwidth of ~67% (4.1–8.0 GHz), with the maximum gain at 7.45 GHz being 3.9 dBi and 4.1 dBi in its flat state and bent state, respectively. Our results suggest that the proposed antenna functions properly in close proximity to a human body and can sustain repetitive bending, which make it well suited for applications in wearable devices.

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