Magnetic resonance imaging

A Helmholtz resonator is a rigid container which has an opening to the air surrounding it. A common example of a Helmholtz resonator is a bottle because it has a set volume as well as having an opening which is open to the surrounding air. By considering the Helmholtz resonator as having a neck, such as the neck of a wine bottle, the dynamics of the system may be described. When energy is introduced near the opening of the bottle, for example blowing across it, some of the energy will vibrate…

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…

The night of October 26th, the Concert Chorale, along with several other ensembles, performed at the Meet the Music Department Concert. During this event, the Chorale sang Barso Re, a Hindu piece written by A.R. Rahman and arranged by Ethan Sperry. The song was used in a film titled Guru, and if translated into english, “Barso Re” means “Let It Rain.” A.R. Rahman may also be credited as the writer of the song “Jai Ho,” a Hindu piece heard in the major motion picture, Slumdog Millionaire. While…

With this how does the search field get narrowed down, for space is rather large? Calculations for everything from mean motion resonances to resonant orbital geometry constraints, then take the planets mass and put it all together to eliminate locations that the planet could not be. Those eliminations help narrow down the areas of space that need to be considered based on where the…

Introduction: The lab experiment on Fabrication and Microwave Frequency Measurement of a ring Resonators was about finding the relative dielectric constant and the response of a ring resonator. These values are found by using a ring resonator and setting a frequency signal to the ring to resonate the signal. This lab also shows how to make the ring resonators from paper or any type of electric device from fabrication. Fabrication is used to print electric devices such as printed circuit boards.…

It was a particularly cold, frisky night in Saturn. We have been in the rings of Saturn on our enemies ship for god knows how long. Our commander, Cayde, at tower Earth sent the Fireteam to Saturn to capture the Taken King. The Taken King, was the biggest plague the system has ever seen. If the Fireteam shut down the Taken King, they ended all of the battle between the Taken and the Vanguards that took place all over the Solar System. It was the Hunter, Titan, and the Warlock. They were…

maintains the magnetic flux and produces a particular value of the flux density B at that point in a magnetic field. Therefore the flux density is the cause while the flux density (B) is the effect. The flux density can be assumed proportionally to the field intensity in a magnetic field which comes in three parts. First part is: Where U stands for the permeability of force (the measure of the degree to which the magnetic line of force can penetrate the material). The value of magnetic space…

Maxwell and Faraday- A Brief History of Electromagnetism The field of electromagnetism was established in 1819, twelve years before Maxwell was born. Hans Christian Oersted from Denmark was the first scientist who thought of the possibility that magnetism and electricity were related. He considered such a possibility because of the observations he made during an experiment. He Placed a wire above a compass and passed a current through the wire. He noticed that the needle of compass moved when…

the two circuits. The value of the coupling capacitance decreases with increasing separation of the circuits. Inductive coupling on the other hand is caused by mutual inductance between two conductors. When current flows through wires it produces a magnetic flux, which can induce a current in adjacent circuits. The geometry of the conductors as well as the separation between them determines the value of the mutual inductance, and hence the degree of the inductive coupling. Typically, capacitive…

provide movement for a vehicle. When an electric current, magnetic field or external force acts on a coil found inside of the motor, it will provide force to it, thus causing the coil to move, the coil rotates on a half turn basis otherwise the motor is forced to stop and will not move. The Motor Effect Motor effect refers to a current carrying wire in place of a magnetic field, the wire experiences a force, instead of the magnetic field producing it. You can measure the force by using the…