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Discovery-driven cube exploration is a desirable way to mark interesting points among a large number of cells in a data cube. Individual users may have different views on whether a point should be considered interesting enough to be marked. Suppose one would like to mark those objects of which the absolute value of z score is over 2 in every row and column in a d-dimensional plane.
(a) Derive an efficient computation method to identify such points during the data cube computation.
(b) Suppose a partially materialized cube has (d - 1)-dimensional and (d + 1)- dimensional cuboids materialized but not the d-dimensional one. Derive an efficient method to mark those (d - 1)-dimensional cells with d-dimensional children that contain such marked points.
Consider a program that accesses a single I/O device and compare unbuffered I/O to the use of a buffer. Show that the use of the buffer can reduce the running time by at most a factor of two.
An initial amount of a radioactive substance y0 is given, along with information about the amount remaining after a given time t in appropriate units. For an equation of the form y = y0ekt that models the situation, give the exact value of k in ter..
What elements should be considered to be included in any recursive method? Discuss these elements using an example (code required) of a recursive method written by you or taken from Web. Try choosing one different from that of any posted thus far.
Complete the requirements using DBDL and create Diagram. Make sure all tables are normalized to 3NF and exhibit proper relationships.
What cost factors are considered when a new tool is evaluated? Why is it required that the tool can be used even when the scale of your project goes up?
1. What are the pros and cons of change? Does change help or hurt the performance of an organization? Do you personally like change? Why or why not? 2. What criteria must be met if firms are to achieve a competitive advantage through their employee..
Describe the Windows XP operating system. Discuss some of your favorite XP features, including its security, management, and administrative features. How do these compare with similar functionalities of other operating systems that you've used
Suppose we have a call option on the square of the stock price. That is the pay-off is What equation does the price of the call option at time t satisfy?
What are the advantages of a Web server?
Design an algorithm to perform a prefix computation on an √n ×√n mesh in 3√n steps. Show that no other algorithm for this problem on this mesh has substantially better performance.
if productCost and productPrice are numeric variables, and productName isa string variable, which of the following statements are valid assignments
Write a program that reads in four numbers from the user (allowing for decimal values) and calculate the sum, average, and product of these four values
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