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Proton decay in intersecting brane models.
We aim to show that in intersecting brane models there are no open string diagrams which represent proton decay into leptons and gauge bosons. We focus on the model of Figure 15.7 and restrict ourselves to string diagrams presented as a disk with boundary punctures, where the set of open string states relevant to the process (incoming and outgoing) are inserted. The punctures split the boundary of the disk into components, which are the loci of open string endpoints, and consequently, are labeled by D-branes.
Prove that no consistent assignment of labels to the boundary components is possi ble given that p10ton decay invol ves thr ee quar ks (and a number of leptons and gauge bosons), and a quark has one endpoint on a baryonic brane and the other endpoint elsewhere. [Hint. Tr y draw ing str ing diagrams. Your attempts should evol ve into a clear and ver y br ief argument.]
Compare and contrast physical access controls and logical access controls. Further explain in what ways both physical and logical access controls are related to implementing a security policy.
If x~y(both have values close to each other but not same), then we would expect some cancellation in computing log(x)-log(y). on the other hand, log(x)-log(y)=log(x/y), and the latter involves no cancellation. Does this mean that computing log..
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Develop an algorithm in narrative and pseudocode or flowchart that will accept the names of all sales staff members and their total sales for the month. The algorithm must calculate the commission at 2% of their total sales amount.
write a matlab program that asks the user to enter a positive number a between 2 and 10. Then create x and y vectors from -a and +a with spacing 0.05.
DNS on a Network
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