known for being "painless, safe, inexpensive, and portable" (Ramezani et al.) with mild side-effects like tingling, rash, irritability, or itching being the most common reactions making this system ideal to continue to study for use on children. TDCS is known for its effectiveness with children who exhibit spastic diparesis CP. Coupling TDCS with treadmill training, virtual reality, and constraint induced movement therapy (CIMT) that improved gait, mobility, and hemiparesis respectively in children with CP. Although this approach is becoming more prominent, more research studies need to be done before it can be used as an approved treatment for children with CP or other neurological disparities. TMS, is similar to TDCS, but instead of a direct pulse it uses a figure-eight electrical coil on the head to make an electromagnetic field that can control cortical excitability and make permanent changes to the brain function (Ramezani et al.). TMS is used in treating ADHD, ASD, schizophrenia, neurological pain, depression, and much more, but also shows promise when used in children with spastic quadriplegic CP. In those children with CP the electromagnetic induction reduced spasticity by calming the spinal nerves, corticospinal tract, and motor cortex to make mobility…
Fig. 3. Schematic Diagram of Power Line Guardians (“PLG”)
PLGs are also used to give the real-time data on the lines such as: line current, conductor temperature, frequency, sag -.
Fig. 4. The PLG communications system.
The diagram (Fig.4) shows the PLG communications system. PLGs (blue) control the power flows on the lines. Super PLGs (red) can control both the power flows and the PLGs. These Super PLGs are also used to communicate with Energy Management Systems (EMS) and allow…
SIMULATION RESULTS AND DISCUSSION
4.5.1 Compensation of Voltage Sags
All the proposed controllers performed to the IEEE standard. Table 4.5 shows voltage sag compensation of the proposed intelligent controllers. Compensated SS value shows the voltage sag compensation capability of the each proposed controller under different fault types and load conditions.
In case 1, performance of DVR with proposed fuzzy logic controller has the sag score 0.5056pu observed at sensitive load before…
AC Conductivity, Ac Resistivity, Dielectric loss, and Dielectric constant are electrical properties and measured as a function of frequency.
AC Conductivity and Resistivity
AC resistance (ρac) was recorded by LCR meter model 4275 in the frequency range 1MHz to 3GHz. AC conductivity was determined by using the value of Ac resistance. As we know, Ac Conductivity is reciprocal of Ac resistance can be calculated by the relation;
ac =1/ρac (6)
The variation of AC…
Multi-Objective LPO by Fuzzy Gravitational Search Algorithm in WWER1000
Authors: M. Aghaiea,*, S.M. Mahmoudib
a Engineering Department, Shahid Beheshti University, G.C, P.O. Box: 1983963113, Tehran, Iran
bFaculty of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, Iran.
Number of manuscript pages:
Number of figures:
Number of tables:
* Corresponding author
Fax: +98 21 29902546
4.1.4 Development of Feed Forward Control model in Simulink
To implement feed forward control. Firstly, the transfer function of the linear DC Motor model has to be obtained. Actually in our case, the input of the plant is current so the transfer function of the mathematical model in ratio of angular velocity to current has to be obtained. It is given by:
G(s)=Ω_1/I_a =R_A/K_M 1/(T_e s+1)
where T_e=(J_meq R_A)/(K_m Cϕ) is electro-mechanical time constant.
The feed forward control could be…
AC stands for alternating current which means that the current flows in both directions. So instead of flowing from one source to another, the current can flow from both the source and the recipient to each other. AC voltage is the current that comes from an electrical plug. An advantage of AC voltage is the fact that the power of the voltage can be altered with a transformer.
Fig.1 graph showing AC and DC current
On the other hand DC voltage stands for direct current. This means that the…
Which is reached by making r = 0.
Therefore P_(L_MAX )= E^2/R_L with an ideal source.
Thus for a completely resistive circuit the internal resistance of a DC source should be equal to zero for maximum power transfer to the load resistance.
The derivation of the maximum power transfer theorem for resistive and non-linear impedance AC circuits.
I – Phasor current
(ωL or-1/ωC)_L and (ωL or-1/ωC)_r= X_L and X_r respectively
I = (E_rms∠0°)/(Z+Z_r ) = (E_rms∠0°)/(r+R_L+j(X_r+X_L))…
Neuronetics, Inc. is a private medical device company based in Malvern, PA. Neuronetics developed NeuroStar Transcranial Magnetic Stimulation (TMS) therapy, where magnetic fields are used for therapeutic applications in disorders related to central nervous system. In 2003, they licensed a revolutionary patented coil design from Emory University and conducted the largest clinical trials on TMS therapy to date. With continuous research and development, a high quality, efficient, user friendly and…
Factors That Contribute to the Digital Divide
One of the crucial factors that contribute to the difficulty to spread technology and business to much of India is the lack of easy transportation. Of the over 1.34 billion people who populate India, 72.2 percent live in 638,000 villages while the remaining 27.8 percent live in only 5,480 towns and urban agglomerations (Population of India 2016, 2016). While urban cities have some paved roads and public transportation means such as…