(a) Consider 6 jobs having the processing times Pj, the due-dates d; and the weights w; ofthe jobs j=1, ..., 6, given in the table:Jobs1234632411Pid712186.7W;25313Calculate the total weighted completion time, the maximum lateness, and the totalweighted tardiness of the following schedule: 4, 2, 6, 3, 1, 5.

The total weighted completion time, the maximum lateness and the total weighted tardiness is given…

Answered: (a) Consider 6 jobs having the…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question 4: For a compressor the probability of failure occurring during a given week is given in Table Q4. ) Calculate the Annual Breakdown Maintenance Costs (where no Preventive Maintenance is carried out). The costs are 300 OMR to repair the compressor, every time it fails. [10] (ii) Preventive maintenance costs 60 OMR for each service. Calculate if Preventive Maintenance is cheaper than Breakdown Maintenance, and if so how often Preventive Maintenance should be carried out. There are 48 working weeks in a year. Table Q4 Probability of failure Week of Operation during the given week 1 0.09 2. 0.40 0.51
(a) Suppose there are seven finals to be scheduled. Suppose that the following pairs of courses have common students: 1 and 2, 1 and 3, 2 and 3, 2 and 4, 2 and 5, 2 and 7, 3 and 4, 3 and 6, 3 and 7, 4 and 5, 4 and 6, 5 and 6, 5 and 7, and 6 and 7. How the final exams can be scheduled so that no student has two exams at the same time?
Computer Science Please Solve the following only through Python code: Toby’s Trucking Company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. a. What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 30 or more than 60 thousand miles in a year? c. How many miles will be traveled by at least 80% of the trucks?
The public utilities commission has decided that the electric company overcharged its customers for two months last year. To make up the difference to the customers, the commission orders the company to decrease each of the next month’s bills by 10%. The city also levies a 3%utility tax, which is to be applied to the bill before it is discounted. Also, the10% discount does not apply to the utility tax. Assume electricity costs $0.16per kilowatt-hour. Write a program to compute the next month’s electricity bill given the number of kilowatt-hours consumed as input
6. Consider a modification to the rod-cutting problem in which, in addition to a value pi for each rod, there is handling cost ci that is one and a half times the length of the rod cut plus a flat fee of 3 (i.e., the handling cost to cut a rod of length 5 is 7.5+3 =10). The revenue generated is the sum of the value of the pieces cut minus the sum of handling costs of the cuts. Provide a dynamic programming approach to solve this problem given an initial rod of length n with potential cut lengths of 1, 2, 5, and 7 [Adapted from ITA, pg. 370, 15.1-3] length of cut (i) 1 2 5 7 value (pi) 5 7 30 45 handling cost (ci) 4.5 6 10.5 13.5
4. Describe the requirements that need to be satisfied to solve the critical section problem. Give a solution to the critical section problem where there are 2 processes.
A steel Column is 10m long and Ø1.2m. It carries a load of 102MN. Given the modulus of Elasticity is 256GPa. Find the stress, Strain, anddetermine how much the column is compressed. {show all the work}
Assume for convenience that demand is constant, the stock keeping unit (SKU) has been stored in k locations of identical size, and all picks are from a single active pick location until that location is exhausted. Then the inventory cycle may be imagined as consisting of k periods, each devoted to a particular pick location. The space utilization in period i is k-(i-1)-12/1 k-i+ k-(i-1) Thus, the average of the space utilization (ASU) of all k periods is asu= (1) The space utilization (SU) of the whole k periods is su = k = k i=1 2 k-i +1 i=1 k-i+ k-i +1 Σk-i+ i=1 k Σ(k-i+1) Use MATLAB® to write the functions to calculate "asu" and "su" of input "K". Employing these functions, program the script to draw the curves that show how both "asu" and "su" increase with additional storage locations, but at a diminishing rate.
A circus is preparing a tower performance in which people stand on top of each other's shoulders. For practical and aesthetic reasons, each individual must be both shorter and lighter than the person below him or her. Develop a formula to calculate the maximum number of people that can fit in such a tower given the heights and weights of each participant in the circus.A circus is preparing a tower performance in which people stand on top of each other's shoulders. For practical and aesthetic reasons, each individual must be both shorter and lighter than the person below him or her. Develop a formula to calculate the maximum number of people that can fit in such a tower given the heights and weights of each participant in the circus.
(b) Show the PLA and PAL implementation diagrams for the following 3 functions f, g and h shown in Fig. Q3(b) using K-map to minimize the functions. Which terms can be shared between these 3 functions? (You need not optimize further by considering the function complement for term sharing). f g h ab ab ab 01 11 10 01 11 10 01 11 10 00 1 1 1 1 X X 01 1 1 1 1 1 X 11 1 X 1 1 X 1 1 10 X X Figure Q3(b) cd 00 cd 00 00 01 11 10 1 X cd 00 00 01 11 1 10 1 1
Construct a graph to show how the time to complete the 10th car changes as the learning curve slope parameter is varied from 75% to 95%. The Mechanical Engineering department has a student team that is designing a formula car for national competition. The time required for the team to assemble the first car is 100 hours. Their improvement (or learning rate) is 0.8, which means that as output is doubled, their time to assemble a car is reduced by 20%. Use this information to determine, Solve, (a) the time it will take the team to assemble the 10th car. (b) the total time required to assemble the first 10 cars. (c) the estimated cumulative average assembly time for the first 10 cars. Solve by hand and by spreadsheet.

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