A sinusoid or sine wave is a mathematical function of the form

𝑦(𝑡) = 𝐴 sin(2𝜋𝑓𝑡 + 𝑡0) + 𝑦0,

with four parameters:

• 𝐴 denotes the amplitude of the sine wave (default value: 1).
• 𝑓 denotes the frequency of the sine wave in Hz (default value: 1/2𝜋).
• 𝑡0 denotes the amount of phase (horizontal) shift of the sine wave (default value: 0).
• 𝑦0 denotes the y-offset or vertical shift of the sine wave (default value: 0).Create a class called Sinusoid with four double data fields representing the four parameters. Additionally, create the following:

• No-argument constructor Sinusoid() that creates a sinusoid with the four default parameter values.
• Constructor Sinusoid(double newAmplitude, double newFreq, double newPhase, double newYOffset) that creates a sinusoid with the user-specified parameter values.
• Method double evalAt(double t) that evaluates the y value of the sinusoid at time t.
• Method double[] evalAt(double[] tArray) that evaluates the y values of the sinusoids at thetimes in array tArray.
• Method void printFunction() that prints the functional form of the sinusoid to the console with2 decimal places for each parameter, e.g. y(t) = 2.00sin(6.28t + 0.50) + 0.10 for the sinusoid with amplitude 2, frequency 1, phase 0.5, and y-offset 0.1.Submit your source code in a file named Sinusoid.java! Do not include a main() method in your submission!

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IT 214: Instructions for Homework Assignment 7

[HW7 will not be accepted late]

• Click the Homework Assignment 7 link to start the assignment. Your unique set of problem numbers will be displayed in a new window (the actual problems are at the end of Chapter 3 of your textbook). Copy the assigned problem numbers.
• Open a MS Word file and type the course number, section number, HW number, and your name.
• Paste copied problem numbers into your MS Word file.
• Log on to MySQL following the instructions you received in class. You can also find the instructions in the Guide to MySQL: PowerPoint presentation for Chapter 3 available on Blackboard.
• After logging on, set the default database (type USE your_user_name; command at the mysql> prompt) and engine (type SET storage_engine=InnoDB; command at the mysql> prompt).
• For each of the assigned problems, write a SQL query to retrieve the required information and test the query in MySQL. Once the query is successfully executed, type your first name and last name at the next mysql> prompt and take a screen shot (press ALT+PRINT SCREEN by holding down the ALT key and then pressing the PRINT SCREEN key). Paste the screen shot in the appropriate location in your MS Word file. Make sure the query, the confirmation messages (if any), and the results (if any) are included in your screen shot. You may use one screen shot for several SQL queries and you may also use several screen shots for one SQL command if needed (see the EXAMPLE section below).
• Save the file on your disk and submit it through the Homework Assignment 7 Submission link.

Example:

Problem 1: Use the appropriate CREATE TABLE command to create the PART table in the Premiere Products database.

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1. The Henry Books: Problem 1 (p. 88). When creating tables, include FKs.
2. The Henry Books: Problem 2 (p. 88). Add any two records to the BRANCH table. After inserting data, use the SELECT* command to show the content of the table.
3. The Henry Books: Problem 3 (p. 88). Add any two records to the PUBLISHER table. After inserting data, use the SELECT* command to show the content of the table.
4. The Henry Books: Problem 4 (p. 88). Add any two records to the AUTHOR table. After inserting data, use the SELECT* command to show the content of the table.
5. The Henry Books: Problem 5 (p. 88). Add any two records to the BOOK table. Make sure records you chose do not violate referential integrity rules (in other words, foreign key values in the BOOK table are consistent with the primary key values in the PUBLISHER table). After inserting data, use the SELECT* command to show the content of the table.
6. The Henry Books: Problem 6 (p. 88). Add any two records to the WROTE table. Make sure records you chose do not violate referential integrity rules (in other words, foreign key values in the WROTE table are consistent with the primary key values in the BOOK table and the AUTHOR table). After inserting data, use the SELECT* command to show the content of the table.
7. The Henry Books: Problem 7 (p. 88). Add any two records to the INVENTORY table. Make sure records you chose do not violate referential integrity rules (in other words, foreign key values in the INVENTORY table are consistent with the primary key values in the BOOK table and the BRANCH table). After inserting data, use the SELECT* command to show the content of the table.

Read “A Very Old Man With Enormous Wings”
Watch Video on Magical Realism

Is “A Very Old Man with Enormous Wings” a magical realist story? Why or why not?

How does the magic in this story give the story a deeper meaning?

Discussion Topic: Gail and Garry

The following is an excerpt from a telephone conversation between Gail Richie, President of Flanders Supplies Co., and Gary Weir, owner of On-Time Employment Co.

Gail: Gary, you’re going to have to do a better job of finding me a new computer programmer. That last guy was great at programming, but he had no common sense.

Gary: What do you mean? The guy had a master’s degree with straight A’s.

Gail: Yes, well, last month he developed a new financial reporting system. He said we could do away with manually preparing a worksheet and financial statement. The computer would automatically generate our financial statements with “a push of a button.”

Gary: So what’s the big deal? Sounds to me like it would save you time and effort.

Gail: Right! The balance sheet showed a minus for supplies!

Gary: Minus supplies? How can that be?

Gail: That’s what I asked.

Gary: So, what did he say?

Gail: Well, after he checked the program, he said that it must be right. The minuses were greater than the pluses…

Gary: Didn’t he know that supplies can’t have a credit balance — it must have a debit balance?

Gail: He asked me what a debit and credit were.

Gary: I see your point.

Comment on (a) the desirability of computerizing Flanders Supplies financial reporting system, (b) the elimination of the worksheet in a computerized accounting system, and (c) the computer programmer’s lack of accounting knowledge.