Monitoring of plant induced electrical signal of broccoli (Brassica oleracea var. italica) under changing light and CO2 conditions

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

Download Full-text

Adaptive identification methods of nonlinear random electrical signal

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209349 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 431-438

Author(s):

Jian Liu ◽

Lihui Wang ◽

Zhengqi Tian

Keyword(s):

Wavelet Transform ◽

Electric Vehicle ◽

Signal To Noise Ratio ◽

Sudden Change ◽

Electrical Signal ◽

Signal Recognition ◽

State Variable ◽

Signal Characteristics ◽

The Matrix ◽

Kalman Filter Algorithm

The nonlinearity of the electric vehicle DC charging equipment and the complexity of the charging environment lead to the complex and changeable DC charging signal of the electric vehicle. It is urgent to study the distortion signal recognition method suitable for the electric vehicle DC charging. Focusing on the characteristics of fundamental and ripple in DC charging signal, the Kalman filter algorithm is used to establish the matrix model, and the state variable method is introduced into the filter algorithm to track the parameter state, and the amplitude and phase of the fundamental waves and each secondary ripple are identified; In view of the time-varying characteristics of the unsteady and abrupt signal in the DC charging signal, the stratification and threshold parameters of the wavelet transform are corrected, and a multi-resolution method is established to identify and separate the unsteady and abrupt signals. Identification method of DC charging distortion signal of electric vehicle based on Kalman/modified wavelet transform is used to decompose and identify the signal characteristics of the whole charging process. Experiment results demonstrate that the algorithm can accurately identify ripple, sudden change and unsteady wave during charging. It has higher signal to noise ratio and lower mean root mean square error.

Download Full-text

Changing light levels induce photo-oxidative stress and alterations in shell density of Amphistegina lobifera (Foraminifera)

Marine Ecology Progress Series ◽

10.3354/meps11698 ◽

2016 ◽

Vol 549 ◽

pp. 69-78 ◽

Cited By ~ 13

Author(s):

M Prazeres ◽

S Uthicke ◽

JM Pandolfi

Keyword(s):

Oxidative Stress ◽

Light Levels ◽

Changing Light

Download Full-text

Decreasing water pressure cues ‘bailout’ in seaweed-associated crustaceans

Marine Ecology Progress Series ◽

10.3354/meps13485 ◽

2020 ◽

Vol 653 ◽

pp. 121-129

Author(s):

RB Taylor ◽

S Patke

Keyword(s):

Water Pressure ◽

Rapid Change ◽

Brown Seaweed ◽

Model System ◽

Rate Of Change ◽

Suitable Habitat ◽

Changing Light ◽

Surface Increase ◽

Reduced Water ◽

Transparent Chamber

Small mobile crustaceans are abundant on seaweeds. Many of these crustaceans rapidly abandon their host if it is detached from the seafloor and floats towards the surface, but the trigger for this ‘bailout’ behaviour is unknown. We tested 2 potential cues, i.e. rapid change in light and rapid change in water pressure, using >1 mm epifauna on the brown seaweed Carpophyllum plumosum as a model system. Bailout occurred in response to reduced water pressure, but not to changing light, as (1) bailout occurred at similar rates in light and dark, (2) bailout occurred on the seafloor when water pressure was reduced within a transparent chamber by the equivalent of ~0.5 m depth or more, and (3) little bailout occurred when water pressure was held constant within the chamber while seaweeds were raised to the surface. Increase in pressure (simulating sinking) did not induce bailout. The rate of bailout increased with increasing magnitude of pressure reduction but was not influenced greatly by the rate of change of pressure within the range tested (up to an equivalent of 0.4 m depth s-1). The use of pressure rather than light as a cue for bailout is consistent with the need for seaweed-associated crustaceans to rapidly abandon a detached host and relocate to suitable habitat during both day and night.

Download Full-text

Iteration Algorithms and Structural Models for Increase of the Accuracy of Electrical Signal Transducers

Telecommunications and Radio Engineering ◽

10.1615/telecomradeng.v64.i2.90 ◽

2005 ◽

Vol 64 (2) ◽

pp. 155-165

Author(s):

L. I. Volgin

Keyword(s):

Structural Models ◽

Electrical Signal ◽

Signal Transducers

Download Full-text

METHOD FOR IDENTIFICATION OF ELECTRICAL SIGNAL DISORDERS BASED ON ADISCRETE WAVELET TRANSFORM

Actual Issues Of Energy ◽

10.25206/2686-6935-2020-2-1-16-21 ◽

2020 ◽

Vol 2 (1) ◽

pp. 016-021

Author(s):

B. Yu. Kisselyov ◽

◽

L. A. Faifer ◽

G. Yu. Kisselyov ◽

◽

...

Keyword(s):

Wavelet Transform ◽

Electrical Signal

Download Full-text

EFFECT OF DIFFERENT DOSES OF BORON ON GROWTH AND YIELD OF OFF-SEASON CAULIFLOWER (BRASSICA OLERACEA VAR. BOTRYTIS) IN ARGHAKHANCHI, NEPAL

Reviews In Food And Agriculture ◽

10.26480/rfna.01.2020.12.17 ◽

2020 ◽

Vol 1 (1) ◽

pp. 12-17

Author(s):

Srijana Pandey ◽

Sapana Parajuli ◽

Biplov Oli ◽

Surya Dhungana

Keyword(s):

Brassica Oleracea ◽

Growth Parameters ◽

Block Design ◽

Leaf Length ◽

Growth And Yield ◽

Cost Ratio ◽

Benefit Cost Ratio ◽

Net Returns ◽

Benefit Cost ◽

Different Doses

The research was conducted at Beltari Sandhikharka-10, Arghakhanchi district to study about the effect of various doses of boron on growth and yield attributing characters of cauliflower (Brassica oleracea var. botrytis) during off-season from February to June in 2020. Five treatments; B0 (control/no application), B1: 2kg/ha, B2: 4kg/ha, B3: 6kg/ha, B4: 8kg/ha which are the different doses of boron application were laid out in Randomized Complete Block Design (RCBD) with 4 replications. The growth parameters like plant height, number of leaves per plant leaf length and leaf breadth of largest leaf were recorded multiple times with 15 days interval. Days to curd initiation and Days from curd initiation to harvest were recorded by regular field observation. The yield parameters; curd weight with leaves, Marketable curd weight, average curd yield, incidence of hollowing were recorded during harvest. The economics from application of boron doses in cauliflower production was obtained in terms of cost of cultivation, gross returns, net returns, and benefit cost ratio. The result showed that the growth and yield attributing characters of cauliflower were significantly affected by application of boron in which the value of these parameters was found significantly higher in B1 followed by other treatments. The average curd yield of cauliflower in B1 was found to be 12.39 mt/ha which was 48.92% higher than that of B0 with curd yield 8.32 mt/ha. Similarly, the net return was found significantly the highest in B1 and the lowest in B0. The result showed that application of boron in the range of 2-4 kg/ha is preferred to control and higher doses in respect of both productivity and economics.

Download Full-text