scholarly journals Common-Mode Noise Reduction in Noncontact Biopotential Acquisition Circuit Based on Imbalance Cancellation of Electrode-Body Impedance

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7140
Author(s):  
Minghui Chen ◽  
Jianqing Wang ◽  
Daisuke Anzai ◽  
Georg Fischer ◽  
Jens Kirchner
Keyword(s):  
Noise Reduction ◽  
Limiting Factor ◽  
Interference Immunity ◽  
Common Mode ◽  
Promising Alternative ◽  
Noise Rejection ◽  
Sensing Technology ◽  
Machine Interface ◽  
Body Impedance

Biopotential sensing technology with electrodes has a great future in medical treatment and human—machine interface, whereas comfort and longevity are two significant problems during usage. Noncontact electrode is a promising alternative to achieve more comfortable and long term biopotential signal recordings than contact electrode. However, it could pick up a significantly higher level of common-mode (CM) noise, which is hardly solved with passive filtering. The impedance imbalance at the electrode-body interface is a limiting factor of this problem, which reduces the common mode rejection ratio (CMRR) of the amplifier. In this work, we firstly present two novel CM noise reduction circuit designs. The circuit designs are based on electrode-body impedance imbalance cancellation. We perform circuit analysis and circuit simulations to explain the principles of the two circuits, both of which showed effectiveness in CM noise rejection. Secondly, we proposed a practical approach to detect and monitor the electrode-body impedance imbalance change. Compared with the conventional approach, it has certain advantages in interference immunity, and good linearity for capacitance. Lastly, we show experimental evaluation results on one of the designs we proposed. The results indicated the validity and feasibility of the approach.

RAPID IN VITRO PROPAGATION OF WESTERN GHATS CULTIVAR - COLOCASIA ESCULENTA FOR THE HIGH FREQUENCY OF PLANTLETS

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Jyothi R ◽  
Srinivasa Murthy K M ◽  
Hossein . ◽  
Veena .
Keyword(s):  
Tissue Culture ◽  
Wide Distribution ◽  
Colocasia Esculenta ◽  
Limiting Factor ◽  
Promising Alternative ◽  
Rapid Multiplication ◽  
Medical Plant ◽  
Total Fat ◽  
Planting Materials

Colocasia esculenta is commonly known as Taro, it is referred to as cocoyam in Nigeria. They are cherished for their rich taste, nutritional and medicinal properties. Every 100 g of taro corms possess 112 Kcal, 26.46 g carbohydrate, 1.50 g protein, 0.20 g total fat and 4.1g fiber (USDA National Nutrient Data Base). Besides its nutritional value, taro is used as a medical plant and provides bioactive compounds used as an anti-cancer drugs. Traditionally, cocoyams are vegetative propagated from tuber fragments, a practice that encourages pathogen distribution. Colocasia esculenta is a widely distributed food crop in the humid tropics and subtropics. Despite of its wide distribution, Taro plants are commonly infected with DsMV and other pathogens. This virus induces conspicuous mosaic, malformation, dwarfing or feathering on leaves in taro. As the results of infection, it reduces the quality and yield of taro production greatly. This virus is thus considered as a major limiting factor in the production of taro. Here plays the importance of  tissue culture plays a major role in producing the disease resistant plants round the year with high quality. For rapid multiplication and production of quality planting materials, tissue culture technology offers promising alternative compared to the traditional production methods. KEYWORDS: Colocasia esculenta, Virus, Pathogens, Conventional propagation, Micropropagation, Yield, Rapid multiplication, Quality

Common-mode Noise Reduction Circuit Design for Biosignal Acquisition System—in Comparison with the DRL

2019 ◽  
Vol 139 (12) ◽  
pp. 657-662
Author(s):  
Minghui Chen ◽  
Jianqing Wang ◽  
Daisuke Anzai ◽  
Georg Fischer
Keyword(s):  
Noise Reduction ◽  
Circuit Design ◽  
Acquisition System ◽  
Common Mode

Effect of Bypass Capacitor in Common-mode Noise Reduction Technique for Automobile PCB

2010 ◽  
Vol 130 (5) ◽  
pp. 479-480
Author(s):  
Takanori Uno ◽  
Kouji Ichikawa ◽  
Yuichi Mabuchi ◽  
Atushi Nakamura
Keyword(s):  
Noise Reduction ◽  
Reduction Technique ◽  
Common Mode ◽  
Noise Reduction Technique

An Approach for Practical Use of Common-Mode Noise Reduction Technique for In-Vehicle Electronic Equipment

2010 ◽  
Vol E93-B (7) ◽  
pp. 1788-1796 ◽  
Author(s):  
Takanori UNO ◽  
Kouji ICHIKAWA ◽  
Yuichi MABUCHI ◽  
Atsushi NAKAMURA ◽  
Yuji OKAZAKI ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Reduction Technique ◽  
Electronic Equipment ◽  
Common Mode ◽  
Noise Reduction Technique

scholarly journals MICRONUTRIENT CONTENTS IN THE PROFILE OF A RECOVERED SOIL WITH SEWAGE SLUDGE AND NATIVE SPECIES OF ATLANTIC FOREST

FLORESTA ◽  
2019 ◽  
Vol 49 (3) ◽  
pp. 485
Author(s):  
Lívia Mara Lima Goulart ◽  
Marianne Fidalgo de Faria ◽  
Grasiela Spada ◽  
Thiago Tássio de Souza Silva ◽  
Iraê Amaral Guerrini
Keyword(s):  
Sewage Sludge ◽  
Atlantic Forest ◽  
Soil Profile ◽  
Native Species ◽  
Control Treatment ◽  
Mineral Fertilization ◽  
Promising Alternative ◽  
Final Destination ◽  
Potassium Supplementation

The use of sewage sludge in agriculture and recovery of degraded areas has been shown as a promising alternative for its final destination. Studies on micronutrient levels after sludge application are necessary to avoid soil contamination at toxic levels. The objective of this work was to verify the micronutrient contents in the soil profile and pH, up to one-meter-deep, nine years after the application of sewage sludge and planting of native species of the Atlantic Forest. The experiment was implemented in a degraded Quartzeneic Neosol and conducted in randomized blocks with four replicates and eight treatments, consisting of six doses of sewage sludge (0, 2.5, 5, 10, 15 and 20 Mg ha-1, with supplementation of potassium due to low concentration in the residue), besides the control treatment, mineral fertilization and only potassium supplementation. After nine years, the contents of all micronutrients evaluated presented a significant response to the application of the treatments, and the application of sewage sludge provided an increase in their contents. Soil pH remained stable at sites receiving mineral fertilization and potassium supplementation. Only manganese and zinc showed mobility in the soil profile. The application of sewage sludge in degraded soil increases the micronutrient content and decreases its movement in the soil profile, and the application of the maximum dose of the residue does not provide toxic levels of these elements in the soil in the long term.

Capacitive Touch Sensing Principle and Application in the Car

2014 ◽  
Vol 721 ◽  
pp. 622-625
Author(s):  
Qiu Xiang Tao
Keyword(s):  
Basic Principle ◽  
Touch Screen ◽  
Human Machine Interface ◽  
Automotive Applications ◽  
Sensing Technology ◽  
Machine Interface ◽  
Internal Operations

Capacitance induction makes touch technology become more intuitive, can detect multiple fingers and at the same time to recognize gestures. This paper will introduce basic principle of capacitance induction and capacitance sensing technology in automotive applications. In this article introduces the structure of multi-touch screen and internal operations will be discussed after multi-touch induction to the change of human-machine interface (HMI).

scholarly journals Long-Term Projections of the Natural Expansion of the Pine Wood Nematode in the Iberian Peninsula

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 849
Author(s):  
Begoña de la Fuente ◽  
Santiago Saura
Keyword(s):  
Iberian Peninsula ◽  
Tree Species ◽  
Average Rate ◽  
Limiting Factor ◽  
Pine Wood Nematode ◽  
Individual Tree ◽  
Pine Wood ◽  
Pine Tree ◽  
Informative Content

The invasive pine wood nematode (PWN), Bursaphelenchus xylophilus, causal agent of pine wilt disease, was first reported in Europe, near Lisbon, in 1999, and has since then spread to most of Portugal. We here modelled the spatiotemporal patterns of future PNW natural spread in the Iberian Peninsula, as dispersed by the vector beetle Monochamus galloprovincialis, using a process-based and previously validated network model. We improved the accuracy, informative content, forecasted period and spatial drivers considered in previous modelling efforts for the PWN in Southern Europe. We considered the distribution and different susceptibility to the PWN of individual pine tree species and the effect of climate change projections on environmental suitability for PWN spread, as we modelled the PWN expansion dynamics over the long term (>100 years). We found that, in the absence of effective containment measures, the PWN will spread naturally to the entire Iberian Peninsula, including the Pyrenees, where it would find a gateway for spread into France. The PWN spread will be relatively gradual, with an average rate of 0.83% of the total current Iberian pine forest area infected yearly. Climate was not found to be an important limiting factor for long-term PWN spread, because (i) there is ample availability of alternative pathways for PWN dispersal through areas that are already suitable for the PWN in the current climatic conditions; and (ii) future temperatures will make most of the Iberian Peninsula suitable for the PWN before the end of this century. Unlike climate, the susceptibility of different pine tree species to the PWN was a strong determinant of PWN expansion through Spain. This finding highlights the importance of accounting for individual tree species data and of additional research on species-specific susceptibility for more accurate modelling of PWN spread and guidance of related containment efforts.

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