Suppose that a disk drive has 6,000 cylinders, numbered 0 to 5999. The drive is currently...

Suppose that a disk drive has 6,000 cylinders, numbered 0 to 5999. The drive is currently serving a request at cylinder 3150, and the previous request was at cylinder 1805 (Hint: this indicates the reading head's moving direction). The queue of pending requests, in FIFO order, is: 

3511, 2332, 2800, 3192, 658, 1296, 1918, 1356, 5936, 2527 

Starting from the current head position, what is the total distance in cylinders) that the disk arm moves to satisfy all the pending requests for each of the following disk-scheduling algorithms? 

a. FCFS 

b. SSTF 

c. SCAN 

d. LOOK 

e. C-SCAN 

f. c-LOOK

In: Other

​The actual demand for the patients at Omaha Emergency Medical Clinic for the first 6 weeks of this year follows:

The actual demand for the patients at Omaha Emergency Medical Clinic for the first 6 weeks of this year follows: 

Clinic administrator Marc Schniederjans wants you to forecast patient demand at the clinic for week 7 by using this data. You decide to use a weighted moving average method to find this fore-cast. Your method uses four actual demand levels, with weights of 0.333 on the present period, 0.25 one period ago, 0.25 two periods ago, and 0.167 three periods ago. 

a) What is the value of your forecast? 

b) If instead the weights were 20, 15, 15, and 10, respectively, how would the forecast change? Explain why.

In: Other

Brine (specific gravity 1.20) is flowing through a standard 80-mm pipe at a maximum rate...

Brine (specific gravity 1.20) is flowing through a standard 80-mm pipe at a maximum rate of 0.9 m³/min. In order to measure the rate of flow, a sharp-edged orifice, connected to a simple U-manometer is to be installed. The maximum reading of the manometer is to be 400 mm Hg. What size orifice should be installed? Repeat, assuming a venturi meter is used instead of an orifice.

In: Other

Consider a production line with five stations. Station 1 can produce a unit in 9 minutes....

Consider a production line with five stations. Station 1 can produce a unit in 9 minutes. Station 2 can produce a unit in 10 minutes. Station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. Station 4 can produce a unit in 5 minutes. Station 5 can produce a unit in 8 minutes. Which station is the bottleneck station?

In: Other

What is the optimal order quantity and the minimum annual cost for Bell Computers to order, purchase, and hold these integrated chips?

Bell Computers purchases integrated chips at $350 per chip. The holding cost is $34 per unit per year, the ordering cost is $121 per order, and sales are steady at 400 per month. The company's supplier, Rich Blue Chip Manufacturing, Inc., decides to offer price concessions in order to attract larger orders. The price structure is shown below .

a) What is the optimal order quantity and the minimum annual cost for Bell Computers to order, purchase, and hold these integrated chips?

The optimal order quantity after the change in pricing structure is ______units (enter your response as a whole number).

The total annual cost for Bell computers to order, purchase, and hold the integrated chips is ________(round your response to the nearest whole number).

b) Bell Computers wishes to use a 10%

holding cost rather than the fixed $37 holding cost in part a. What is the optimal order quantity, and what is the optimal annualcost?

The optimal order quantity after the change in the holding cost calculation is ______units (enter your response as a whole number).

The total annual cost for Bell computers to order, purchase, and hold the integrated chips is ________round your response to the nearest whole number).

In: Other

Thomas' Bike Shop stocks a high volume item that has a normally distributed demand during the reorder period.

Thomas' Bike Shop stocks a high volume item that has a normally distributed demand during the reorder period. The average daily demand is 70 units, the lead time is 4 days, and the standard deviation of demand during the reorder period is 15.
a. How much safety stock provides a 95% service level to Thomas?
b. What should the reorder point be?

In: Other

Calculate D in rectangular coordinates at point P(2, -3, 6) produced by

D3.2. Calculate D in rectangular coordinates at point P(2, -3, 6) produced by: (a) a point charge Q_A-55 mC at Q(-2, 3, -6); (b a uniform line charge ?ρ_LB 20 mC/m on the x axis; (c) a uniform surface charge density ρ_sc 120 μC/ m" on the plane z =-5 m.

In: Other

4-8. The load of 800 lb is supported by the four 304 stain- less steel wires...

The load of 800 lb is supported by the four 304 stain-less steel wires that are connected to the rigid members AB and DC. Determine the angle of tilt of each member after the load is applied. The members were originally horizontal, and each wire has a cross-sectional area of 0.05 in². 

In: Other

Coding Java Vending machine Lab

Given two integers as user inputs that represent the number of drinks to buy and the number of bottles to restock, create a VendingMachine object that performs the following operations:

• Purchases input number of drinks

• Restocks input number of bottles

• Reports inventory

The VendingMachine is found in VendingMachine.java. A VendingMachine's initial inventory is 20 drinks.

Ex: If the input is:

5 2

the output is:

Inventory: 17 bottles






import java.util.Scanner;

public class LabProgram {
   public static void main(String[] args) {
      Scanner scnr = new Scanner(System.in);
      
      /* Type your code here. */ 
      
   }
}

In: Other

The following table gives the number of pints of type A blood used at Damascus Hospital...

The following table gives the number of pints of type A blood used at Damascus Hospital in the past 6 weeks: 

a) The forecasted demand for the week of October 12 using a 3-week moving average =pints (round your response to two decimal places). 

b) Using a 3 -week weighted moving average, with weights of 0.20,0.30, and 0.50, using 0.50 for the most recent week, the forecasted demand for the week of October 12=_______ pints (round your response to two decimal places and remember to use the weights in appropriate order - the largest weight applies to most recent period and smallest weight applies to oldest period.)

c) If the forecasted demand for the week of August 31 is 350 and α = 0.25, using exponential smoothing, develop the forecast for each of the weeks with the known demand and the forecast for the week of October 12 (round your responses to two decimal places).

In: Other

​Southeastern Bell stocks a certain switch connector at its central warehouse for supplying field service offices.

Southeastern Bell stocks a certain switch connector at its central warehouse for supplying field service offices. The yearly demand for these connectors is 15,000 units Southeastern estimates its annual holding cost for this item to be $24 per unit. The cost to place and process an order from the supplier is $77. The company operates 300 days per year, and the lead time to receive an order from the supplier is 3 working days.

a)Find the economic order quantity.

b) Find the annual holding costs.

c) Find the annual ordering costs.

d) What is the reorder point?

In: Other

Sales of tablet computers at Ted Glickman's electronics store in Washington, D.C., over the past 10...

Sales of tablet computers at Ted Glickman's electronics store in Washington, D.C., over the past 10 weeks are shown in the table below: 

The forecast for weeks 2 through 10 using exponential smoothing with α = 0.50 and a week 1 initial forecast of 20.0 are (round your responses to two decimal places): 

In: Other

A shunt-type ohmmeter uses a 2 mA basic d'Arsonval movement with an internal resistance of 25...

A shunt-type ohmmeter uses a 2 mA basic d'Arsonval movement with an internal resistance of 25 Ω. The battery emf is 1.5 V. 

Calculate:-

 (a) Value of the resistor in series with the battery to adjust the Full Scale Deflection (FSD) 

 (b) At what point (percentage) of full-scale will 100 Q be marked on the scale?

Rx = unknown resistance R1 = scale adjusting resistance E = omf of intemal battery Rm= PMMC meter resistance S = switch EI

In: Other

A toy manufacturer makes its own wind-up motors, which are then put into its toys While the toy manufacturing process is continuous

A toy manufacturer makes its own wind-up motors, which are then put into its toys While the toy manufacturing process is continuous, the motors are intermittent flow. Data on the manufacture of the motors appears below.

 Annual demand (D)-50,000 units Daily subassembly production rate = 1,000 

 Setup cost (S) = $85 per batch   Daily subassembly usage rate = 200

Carrying cost = $.20 per unit per year  

 1. To minimize cost, how large should each batch of subassemblies be? 

 2. What is the average inventory for this problem?

 3. What is the total annual inventory cost (holding plus setup) of the optimal behavior in this 3 Marks problem?

In: Other

​To determine whether the pipe welds in a nuclear power plant meet specifications a random sample of welds is selected

To determine whether the pipe welds in a nuclear power plant meet specifications a random sample of welds is selected, and tests conducted on each. Weld strength is measured as the force required to break the weld. Suppose the specifications state that mean strength of welds should exceed 100lb/in2; the inspection team decides to test Ho : μ = 100 versus Ha : μ < 100 why is this not as good as Ha : μ > 100

In: Other