scholarly journals Vapor-printed polymer electrodes for long-term, on-demand health monitoring

2019 ◽  
Vol 5 (3) ◽  
pp. eaaw0463 ◽  
Author(s):  
Jae Joon Kim ◽  
Linden K. Allison ◽  
Trisha L. Andrew
Keyword(s):  
Thin Film ◽  
Health Monitoring ◽  
Conjugated Polymer ◽  
Natural Growth ◽  
Bioimpedance Spectroscopy ◽  
Ultraviolet A ◽  
Deep Tissue ◽  
On Demand ◽  
Polymer Electrodes

We vapor print conformal conjugated polymer electrodes directly onto living plants and use these electrodes to probe the health of actively growing specimens using bioimpedance spectroscopy. Vapor-printed polymer electrodes, unlike their adhesive thin-film counterparts, do not delaminate from microtextured living surfaces as the organism matures and do not observably attenuate the natural growth pattern and self-sustenance of the plants investigated here. On-demand, noninvasive bioimpedance spectroscopy performed with long-lasting vapor-printed polymer electrodes can reliably detect deep tissue damage caused by dehydration and ultraviolet A exposure throughout the life cycle of a plant.

Enhancing the power generation of Rhodopseudomonas palustris-based MFC

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1261-1268
Author(s):  
Shu Otani ◽  
Dang-Trang Nguyen ◽  
Kozo Taguchi
Keyword(s):  
Activated Carbon ◽  
Rhodopseudomonas Palustris ◽  
Ozone Treatment ◽  
Maximum Power Density ◽  
On Demand ◽  
Long Time ◽  
Dry Conditions ◽  
Carbon Sheet ◽  
Uv Ozone

In this study, a portable and disposable paper-based microbial fuel cell (MFC) was fabricated. The MFC was powered by Rhodopseudomonas palustris bacteria (R. palustris). An activated carbon sheet-based anode pre-loaded organic matter (starch) and R. palustris was used. By using starch in the anode, R. palustris-loaded on the anode could be preserved for a long time in dry conditions. The MFC could generate electricity on-demand activated by adding water to the anode. The activated carbon sheet anode was treated by UV-ozone treatment to remove impurities and to improve its hydrophilicity before being loaded with R. palustris. The developed MFC could generate the maximum power density of 0.9 μW/cm2 and could be preserved for long-term usage with little performance degradation (10% after four weeks).

scholarly journals Long-Term IoT-Based Maternal Monitoring: System Design and Evaluation

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2281
Author(s):  
Fatemeh Sarhaddi ◽  
Iman Azimi ◽  
Sina Labbaf ◽  
Hannakaisa Niela-Vilén ◽  
Nikil Dutt ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Maternal Health ◽  
Pregnant Women ◽  
Health Monitoring ◽  
Quality Care ◽  
Well Being ◽  
Pregnancy And Postpartum ◽  
Comprehensive Framework ◽  
Specific Health

Pregnancy is a unique time when many mothers gain awareness of their lifestyle and its impacts on the fetus. High-quality care during pregnancy is needed to identify possible complications early and ensure the mother’s and her unborn baby’s health and well-being. Different studies have thus far proposed maternal health monitoring systems. However, they are designed for a specific health problem or are limited to questionnaires and short-term data collection methods. Moreover, the requirements and challenges have not been evaluated in long-term studies. Maternal health necessitates a comprehensive framework enabling continuous monitoring of pregnant women. In this paper, we present an Internet-of-Things (IoT)-based system to provide ubiquitous maternal health monitoring during pregnancy and postpartum. The system consists of various data collectors to track the mother’s condition, including stress, sleep, and physical activity. We carried out the full system implementation and conducted a real human subject study on pregnant women in Southwestern Finland. We then evaluated the system’s feasibility, energy efficiency, and data reliability. Our results show that the implemented system is feasible in terms of system usage during nine months. We also indicate the smartwatch, used in our study, has acceptable energy efficiency in long-term monitoring and is able to collect reliable photoplethysmography data. Finally, we discuss the integration of the presented system with the current healthcare system.

Dry Flexible Electrode Based on MWCNT for Long Term Health Monitoring

2021 ◽  
Author(s):  
Chiraz Naggara ◽  
Dhouha Bouchaala ◽  
Rajarajan Ramalingame ◽  
Nabil Derbel ◽  
Olfa Kanoun
Keyword(s):  
Health Monitoring ◽  
Flexible Electrode

Achieving over 4% efficiency for SnS/CdS thin-film solar cells by improving the heterojunction interface quality

2020 ◽  
Vol 8 (39) ◽  
pp. 20658-20665 ◽  
Author(s):  
Jae Yu Cho ◽  
SeongYeon Kim ◽  
Raju Nandi ◽  
Junsung Jang ◽  
Hee-Sun Yun ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Vapor Transport ◽  
Thin Film Solar Cells ◽  
Interface Quality ◽  
Heterojunction Solar Cells ◽  
Term Stability ◽  
Long Term Stability ◽  
Cds Thin Film

The highest efficiency of 4.225% for vapor-transport-deposited SnS absorber/CdS heterojunction solar cells with good long-term stability over two years is achieved.

Lateral actuation of an organic droplet on conjugated polymer electrodes via imbalanced interfacial tensions

Soft Matter ◽  
2016 ◽  
Vol 12 (33) ◽  
pp. 6902-6909 ◽  
Author(s):  
Wei Xu ◽  
Jian Xu ◽  
Xin Li ◽  
Ye Tian ◽  
Chang-Hwan Choi ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Interfacial Tensions ◽  
Polymer Electrodes

On-demand therapy with pantoprazole 20 mg as effective long-term managemnt of patients suffering from mild GERD

2003 ◽  
Vol 124 (4) ◽  
pp. A538 ◽  
Author(s):  
S. Kaspari ◽  
L. Kupcinskas ◽  
R. Fischer ◽  
P. Berghoefer
Keyword(s):  
On Demand
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