Electrical impedance

Electroencephalogram (EEG) used to measure abnormalities in the brain which related to electrical activity (Fig.1). This measurement tracks and records brain wave patterns by using electrodes are placed on the scalp, and then signals go to a computer to record the results. Abnormal patterns in EEG indicate seizures and other problems [3][6]. The importance reason for using EEG is to diagnose and show seizure disorders. Also EEGs help to help to identify causes of other problems like sleep…

As it was demonstrated in Figure 2, the peaks at 1703 and 1727 cm-1 in the MPS-comprising nanohybrids appeared, while the peak at 1745 cm-1 vanished. Through the formation of MPS-comprising nanohybrids, the observation of the new absorption bands (1707 and 1727 cm-1 ) concomitant of the absorption at 1733 cm-1 may be owing to the formation of ester groups through the reaction between carboxylic acid groups of PAA oligomers and silanol groups of silica moieties 12. Besides, in SiO2/PAA hybrids,…

measurement of body fat. A persons weight includes both muscle and body fat. Thus meaning that a body builder could have a high BMI, but not be overweight. Physicians use other tests such as skinfold testing, hydrostatic weight, and bioelectrical impedance to determine body fat. The skinfold tests are based on the fact that most of the body fat is subcutaneous, meaning it is on the surface of the body. Calipers are used in different locations of the body to determine thickness. Hydrostatic…

The history of piezoelectricity evolution is over 120 years which was discovered by brothers Curie in 1880. They were Pierre Curie (1859-1906) and Jacques Curie (1855-1941). During the study of the generation surface electrical charge by applying pressure on some material, they found out an unusual phenomenon which was a voltage of opposite polarity was generated by pressure was applied on the crystalline minerals such as quartz. The amplitude of the generated voltage was proportional to the…

Tinnitus is a common symptom of perceiving sound without external stimuli outside the ear. Tinnitus is often referred to as ear ringing or buzzing sensation, where a sound is constantly repeated inside the person's ear with or without external sound present. Tinnitus originates in the middle ear. Sounds can occur at any time and sounds can vary in loudness and pitch. Prolonged exposure to loud noise can contribute to tinnitus and thereby causing permanent hearing loss. There are many factors…

thickness. The experimental results showed that the D.C electrical conductivity increased with increasing the alumina concentrations and temperature. Also the activation energy change with increasing of additional alumina. The dielectric constant, dielectric loss, A.C electrical conductivity are changed with change the concentration of the filler and frequency of applied electrical field. Keywords: Composites, poly-methyl methacrylate, Electrical Properties. Introduction In order to fulfill the…

All heartbeats consist of a mechanical component and an electrical component. The heartbeat is created by cardiac depolarization caused by electrical currents that induce muscle contraction. The electrical component of the heartbeat begins in the Sinoatrial (SA) Node and its function is to send electrical impulses that stimulate your heart to beat, and these impulses induce the atria to contract. As the atria contract, the impulse moves on to the Atrioventricular (AV) node which leads the…

It is chemically inert and exhibits very high sensitivity that guarantees nothing more sophisticated than a charge amplifier to buffer the extremely high source. Impedance of this largely capacitive transducer. The sensing capability of a PZT patch is utilized in sensing conductance to monitor health of a structure. Key features include low cost, small size, dynamic performance, and fast response, long range of linearity…

operation and safety as internal safety of the aircraft is an inherent function of management. Modifications and improvement in safety is a continual process however there are much safety kept in the form clothing, noise control, temperature and electrical control. For the aircraft there are fabrics for fire safety and precaution like Nomex, Kevlar and PBI. For fire safety and protection at high temperature PBI is the most preferred as it is the engineered blend of Nomex and Kevlar (Jackson,…

fancied yield has the lower force than the info signal. Side bands: The Radio transmission includes that in making up a data about sound frequencies on the electromagnetic waves are called as transporter the wave and the procedure of keeping the electrical picture of sound in the bearer wave is also known as adjustment and in balance is of by two sorts and they are adequacy regulation and also the recurrence tweak. And entirety is the Contrasts of that these tweaks are known as sidebands. And in…