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Mobile Wheeled Robot Motion Control with Usage of Geolocation Sensors
Get PDFThe authors state mobile robot motion control peculiarities induced by the operation of geolocation sensors. This paper specifies features of geolocation sensors – GPS receiver and electronic compass (magnetometer). The lay of the land and man-made structures are obstacles for GPS signals. The paper describes the precision of the GPS receiver and offers a method that can reduce the probable error of the GPS signal. This method is a program digital filter based on finding GPS data kernel – the most likely mobile robot location, expressed in terms of latitude and longitude. The paper formulates functioning principles of the six-wheeled robot movement automatic control system that uses geolocation sensors data
Efficacy of Anesthetics for Reducing Stress in Fish During Aquaculture Practices - A Review
Get PDFIntensification of aquaculture practices has increased the stress level in fish. Transportation, handling, sorting by size, weighing, increased farming density, confinement level, and degradation of water quality are stressors in aquaculture practices which exhibit physiological stress responses in fish. These stressors bring changes in plasma cortisol, glucose, lactase, plasma chloride, sodium, and lymphocyte concentrations in fish. Fish stress and mortality can cause significant losses of resources and productivity in both capture and culture systems. Use of anesthetics with optimum concentration could mitigate the stress and its related harm in fish, by increasing fish welfare, production, and profitability. This review has summarized the aquaculture stress, its related consequences to fish, and the efficacy of anesthetics to reduce these factors
Comparison of Measured and Computed Neutron Yield Versus Pressure Curve on NX2 at Different Operating Voltages
Get PDFNumerical experiments are carried out using the Lee model code to compute the neutron yield of NX2 as a function of pressure. Results are compared with the published data (measured) and comparison shows good agreement for maximum neutron yield and for the range of the gas pressure. Measured neutron yield for operating voltage 14.5 kV is larger by factor 2 but operating voltages 10.5 kV and 12.5 kV is larger by more than factor 2
Existence of Mild and Classical Solutions of Nonlinear Integrodifferential Equation in Banach Space
Get PDFIn this paper, we use the theory of analytic semigroups to prove the existence and uniqueness of local mild and then classical solution of a class of nonlinear integrodifferential equations in Banach space
Study of Variation of Coefficient of Restitution on Subjecting the Bouncing Surface with A4 Paper
Get PDFThe coefficient of restitution (COR) of two colliding objects is the ratio of the relative velocity of separation to the relative velocity of approach. The coefficient of restitution varies from materials chosen. In this research we are interested in studying the variation of the coefficient of restitution by adding A4 paper on the bouncing surface where bouncing surface is the base for the ball bounce (example, thick plane plywood). We, then study the trend of the observed data i.e. we look at the nature of coefficient of restitution over the increasing number of A4 paper
Surface Modification of Polycarbonate by Atmospheric Pressure Cold Argon/Air Plasma Jet
Get PDFIn this paper, atmospheric pressure plasma jet and its application for polymer surface modification is reported. Atmospheric pressure plasma jet sustained in Argon/Air mixture has been used to modify the surface properties of polycarbonate (PC). The surface properties of the untreated and plasma treated PC samples were characterized by contact angle measurement with water and glycerol. The contact angles were used to determine the surface energy and its polar and dispersion components. The effect of treatment time, frequency of the applied voltage, distance of the sample from the nozzle on the wettability of the sample was studied. It was found that the contact angle of water in untreated PC sample is 89° while it decreases to 35° after 5 minutes of treatment time. Moreover, it was found that, the best plasma treatment can be obtained with frequency 27 kHz and a distance of 1 cm between surface of samples (PC) and plasma jet's nozzle. Our result showed that atmospheric pressure non thermal plasma can be effectively used to enhance the surface wettability and surface energy of PC. 
Langmuir Double Probe for Plasma Parameters Measurement
Get PDFThis paper reports the measurement of electron temperature (Te) and electron density (ne), Debye length (λD), and plasma frequency (fp) in a low-pressure DC glow discharge in air using Langmuir double probe. Three different methods, namely: Double slope, Dote, and Interception, were used to evaluate the electron temperature (Te), and the mean value of Te obtained from the above three methods was used to calculate the electron density, Debye length, and plasma frequency. The main objective of the study is to investigate the effect of discharge voltage and pressure on the plasma parameters at low pressure and low voltage. The experiment showed that (Te), (ne), and (λD) gradually increased, but (fp) decreased on increasing the voltage from 550V to 700V respectively. Similarly, on increasing the pressure from 0.10 to 0.16 mbar, there was a decrease in electron temperature and Debye length, whereas an increase in electron density and plasma frequency
Effect on Plasma Parameters in a Dielectric Barrier Discharge Reactor with Volatile Organic Compounds
No full textA Dielectric barrier discharge (DBD) device is set up in Ravenshaw University, Cuttack, India to study the plasma assisted destruction of volatile organic pollutants like nitro - benzene and chloro-benzene etc. Plasma parameters like electron density and temperature for argon plasma is measured using spectroscopic technique. The electron temperature of plasma is found to be ~ 1.81 eV for applied voltage 7 kV, MFC at the rate of 1 lit/min and the plasma current is ~ 0.31 mA. When the applied voltage is increased electron temperature as well as electron density increases so also the plasma current showing enhancement of ionization. Volatile organic compound like nitro-benzene on treatment with argon plasma environment inside DBD reactor increases electron temperature in the system and the electron density also increased twice. On the other hand when chlorobenzene is treated with plasma the electron temperature in the system decreases appreciably so also electron density. This indicates the dissociation of chlorine from benzene to neutralize free electrons of argon plasma acting as electron scavenger
The Plasma Focus Scaled for Neutrons, Soft X-Rays, Fast Ion Beams, and Fast Plasma Streams
Get PDFBeing an intense source of neutrons, soft x-rays, ion beams and fast plasma streams, the plasma focus promises applications such as fusion energy, advanced microlithography, materials synthesizing and testing, radiation diagnostics, medical isotopes and imaging. This paper reviews the scaling laws of neutrons, soft x-rays, ion beams and fast plasma streams derived from extensive numerical experiments conducted over the past 7 years
On the Role of Fast Neutrals in the Process of Blob Formation in Low Temperature Plasmas
Get PDFThe variation of electron temperature of argon plasma with base pressure is reported using emission spectroscopy signature. It is observed that the electron temperature of plasma is < 1 eV. It is reported that at higher base pressure ~ 1 mb or above a number of prominent argon lines are observed unlike that at lower base pressure. This indicates formation of more fast neutrals inside bulk plasma at high base pressure value. Fast imaging results (~9100 fps) shows blob formation from main plasma column at base pressure 1 mb and above. For these experimental findings it can be proposed that the asymmetry force due to fast neutrals inside bulk plasma and slow neutrals outside main plasma column is responsible for blob formation at higher base pressure