## Thursday, February 20, 2020

### Physics MRI Essay Example | Topics and Well Written Essays - 1000 words

Physics MRI - Essay Example The Larmor (or resonant) frequency Ãâ€°0 is the frequency at which the nuclide precesses about the magnetic field. The resonant frequency is equal to the magnetogyric ratio ÃŽ ³ (specific to the nuclide) times the magnetic field B (Brandolini, 2004): the nuclide 13C at 75 MHz. From the equation above, the magnetogyric ratio ÃŽ ³ is constant so that ÃŽ ³ =Ãâ€°0 /B = Ãâ€°Ã¢â‚¬â„¢0 /BÃ¢â‚¬â„¢, where Ãâ€°Ã¢â‚¬â„¢0 is the resonant frequency when the magnetic field BÃ¢â‚¬â„¢ = 1.5 T. Solving for Ãâ€°Ã¢â‚¬â„¢0 : Ãâ€°Ã¢â‚¬â„¢0 = (Ãâ€°0 BÃ¢â‚¬â„¢)/B what is the mean B and B This is explained in the sentence directly above: the single prime corresponds to the resonant frequency when the magnetic field is 1.5 T. You are asking what is meant by BÃ¢â‚¬â„¢, but if you look at the sentence above, it was just defined: BÃ¢â‚¬â„¢ = 1.5T. It is the magnetic field at 1.5T. BÃ¢â‚¬â„¢Ã¢â‚¬â„¢ is just a different value of the magnetic field (in this case 4 T) where we are trying to find the frequency w0Ã¢â‚¬â„¢Ã¢â‚¬â„¢ that corresponds to it. From this equation, if you know the frequency Ãâ€°0 and the magnetic field B, then the ratio of these is the gyromagnetic ratio. We know the frequency at 6.9T from the reference cited above. Therefore, to find the frequency at a different magnetic field, we just use the equation w0/B = ÃŽ ³ = constant. So another set of corresponding values of w0 and B, call these new values w0Ã¢â‚¬â„¢Ã¢â‚¬â„¢ and BÃ¢â‚¬â„¢Ã¢â‚¬â„¢, will also have the same ratio: w0Ã¢â‚¬â„¢Ã¢â‚¬â„¢/BÃ¢â‚¬â„¢Ã¢â‚¬â„¢ =ÃŽ ³ constant = w0/B. Since we now have w0Ã¢â‚¬â„¢Ã¢â‚¬â„¢/BÃ¢â‚¬â„¢Ã¢â‚¬â„¢ = w0/B, we can multiply both sides by BÃ¢â‚¬â„¢Ã¢â‚¬â„¢ to get: w0Ã¢â‚¬â„¢Ã¢â‚¬â„¢ = w0 * BÃ¢â‚¬â„¢Ã¢â‚¬â„¢/B . Hopefully you can now see where that equation comes from. The reason I didnÃ¢â‚¬â„¢t put the calculation down in this case, is because it is EXACTLY the same as the calculation before it, but with different values. You can just follow the equations that were used in the example above it, putting in the

## Tuesday, February 4, 2020

### Market equilibrium Research Paper Example | Topics and Well Written Essays - 750 words

Market equilibrium - Research Paper Example Production and consumption of goods and services are influenced by several factors. However, it is worth to note that there are critical aspects of the society that determines demand and supply. In the context of economics, the society is always entangled in a struggle to satisfy its diverse needs with limited resources. Exchange of goods and services constitutes market and is subject to natural or artificial forces (Dwivedi,2010). The goal of the society has remained achieving equilibrium in the market. In other words, market equilibrium is a state of balance between goods and services supplied and demanded. Under this condition prices and quantity are reconciled between the seller and the buyer. For instance, assuming the equilibrium price is Pe and equilibrium quantity is Qe;it mean that the seller and the buyer has consented the quantity and prices. A diagrammatical presentation of a market equilibrium can be shown below.Supply and demand curves.(Fig.1)The figure .1 above shows t he supply and demand curves with the convergent points indicating equilibrium. This Pe represents equilibrium price and Qe representing equilibrium quantity. It is worth to note that the highlighted prices and quantity stated are mutually accepted by the two parties to the agreement. In other words, there are times when the demand and supply of goods shows no tendency to change and this constitutes market equilibrium. The price changes are a function of equilibrium status of the market.

## Sunday, January 19, 2020

### Land Ethic :: essays research papers

The land ethic is a holistic view of ecosystems. It entails an entire view of a biotic community to include all of nature, not just the individualistic components which incorporate our environment. Great efforts would be taken by supporters of the Ã¢â‚¬Ëœland ethicÃ¢â‚¬â„¢ to support an ecosystem that was threatened. The individual components that comprise the ecosystem are not of great concern to supporters of this theory; they would argue that a threat to an individual organism, even protected or endangered, should be evaluated on whether or not the protected or endangered species does endanger the integrity of the whole system. A supporter of the land ethic argument would have consequences to weigh regarding the value of the threatened individual and how it relates to the survival of individuals of the group. If the group were to suffer a threatening blow that could affect the livelihood or existence of members of the controlling group one would expect that the threatened organis m could be evaluated for possible Ã¢â‚¬Å"non-protectionÃ¢â‚¬ . In contrast, a Respect for Nature ethic believes that any animal or living organism should be protected because that organism is deserving of its own individual worth; the fact that it is protected or endangered would be of little concern to these supporters. The simple fact that an individual is threatened is more than sufficient to justify that great efforts be taken to protect that individual entity. The Respect for Nature ethic followers would argue that every organism is worthy of protection because of an inherent worth that entitles that entity to protection from destruction. Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  If society were to take either side of this argument, there would be consequences. To take the land ethic view, our current use of the land for farming and raising livestock would change and our view as the conqueror of the land would change to more towards a Ã¢â‚¬Å"biotic citizenÃ¢â‚¬  or a member of the land community.