Computer Science Projects

Washing Machine Task Write a Java program that simulates a washing machine. The graphical user interface consists of two parts: the control panel for setting up washing conditions and the drawing panel for simulating the turbo movement when the machine starts. Note: the example GUI is to illustrate the key interface components rather than suggesting this is the only interface that everyone should stick to. You are encouraged to come up with your own design. Level 1: Appearance and layout Think about appropriate fonts and colours for the labels and the display. Also spend some time on background colours, borders, and the shape of buttons. Work out a layout that resembles a washing machine control panel. Washing machines usually have different interfaces, but they share some common components. You are also encouraged to design a novel interface that you could possibly justify. You may use any number of panels and any layout managers. Level 2: Event handling The toggle “ON/OFF” button tur...

Description Read a list of friend relations A-B, A-D, C-A, C-D, ..., and determine friendship circles. 2 Problem Statement These days, it seems that we expect computers to direct our social lives, even to the point of choosing our friends. Of course, as programmers, we get to implement these choice algorithms, as in this problem. Given a \friend relation" { a set of pairs of people who designate each other as \friends" { and a particular person (C, \the client") your algorithm is to select any speci ed number (N) of people who are not friends of C, but who are friends of friends of C. Speci cally, the algorithm picks those people who know the greatest numbers of C's friends. For example, if N = 2, C is Jack, and the friend relation is Jack/Mary Mary/Claire Jack/Tom Tom/Claire Jack/Richard Tod/Richard Claire/Richard Jack/Jill Jill/June June/Tod Jill/Tod Jill/Peter Mary/Tom Richard/Tom Jill/Tom the program would select Claire (who knows Jack's friends Mary, Tom, an...

Introduction Answer the following questions from your textbook. You may submit in any format that is neat and readable. Electronic submissions (no required) are to be submitted using D2L on or before the due date. Chapter 21, page 809, exercises 21.25 and 21.26. Explanation Use the following information for both questions: Let us assume a clock with linear time points 0, 1, 2, 3... and that the original read and write timestamps of all items are 0 (without loss of generality). read_TS(X) = read_TS(Y) = read_TS(Z) = 0 write_TS(X) = write_TS(Y) = write_TS(Z) = 0 The two schedules can be written as follows in shorthand notation: SE: r2(Z); r2(Y); w2(Y); r3(Y); r3(Z); r1(X); w1(X); w3(Y); w3(Z); r2(X); r1(Y); w1(Y); w2(X); 1 2 3 4 5 6 7 8 9 10 11 12 13 SF: r3(Y); r3(Z); r1(X); w1(X); w3(Y); w3(Z); r2(Z); r1(Y); w1(Y); r2(Y); w2(Y); r2(X);w2(X); 1 2 3 4 5 6 7 8 9 10 11 12 13 Assume that each operation takes one time unit, so that the numbers under the operations indicate the time when each ...

Write SQL statements (queries) to answer the following questions (Make sure to replace XXX with your initials!): 1. Write an SQL statement to list all columns and all rows for the table Service. Save the query results as XXXQ1. 2. Write an SQL statement to list LastName, FirstName, and CellPhone for all employees having an experience level of Master. Save the query results as XXXQ2 3. Write an SQL statement to list the names of employees who have worked on a property in New York. Use a subquery. Save the query results as XXXQ3. 4. Answer question 3 but use a join. Save the query results as XXXQ4. 5. Write an SQL statement to list the names of employees who have worked on a property owned by a corporation. You can use either subquery or join for this question. Save the query results as XXXQ5. 6. Write an SQL statement to show the first name and sum of hours worked for each employee. Save the query results as XXXQ6. 7. Write an SQL statement to show the sum of hours worked for each Exper...

Buy now Introduction Operating Systems have a need for extremely compact data structures, as often these need to be stored wholly in memory. Examples of this are free memory lists, page tables and disk space bitmaps. This  practical Case Study will refresh your knowledge of bit operations, necessary to manipulate such compact data structures. We will use a simple variant of the card game poker as the inspiration for our compact data structure. In this exercise, you will model a deck of playing cards as a bit 1eld. Only six bits are required to fully describe a card, two for the suit and four for the value. An extra bit as been added to the structure to encode the colour of the card. A second bit 1eld will be used to store the number of pairs contained in a hand. Read this section fully before attempting any of the exercises. These instructions contain some background information, the task to perform, sample code and some system documentation extract. 2 Structure of the bit 1elds 2...

Introduction For this assignment, you will perform basic ASCII file Input and Output. Your program will read a series of questions from an input file, present them to the user, get the user's responses to the questions, and write both the questions and the responses to an output file. Specifications You program will begin by prompting the user to enter two filenames. The first filename will be the input file that contains the questions. The second filename will be the output file where the questions and responses will be written. Once the filenames are known, the program will open the two files, one for input and one for output. Your program will then enter a loop which will read each question from the input file, print the question to the console, and get the user's response to the question from the console. It will then write both the question and response to the output file. Your program will continue to do this until there are no more questions to be read from the input fil...

Consider the following requirements: Your group is responsible for developing a database to support the fundamental data requirements of a customer call center for an established network service provider (includes landline, mobile and internet (broadband) services) - CallAir.  Due to increased competition in the market, CallAir. Due to increase competition in the market, CallAir is under increasing pressure to remain competitive and to rebuild its waning customer base. In order to do this, CallAir requires a unified view of all its customer data including customer personal information, bill details, marketing preferences, history with the organization providing CallAir with the ability to target customers with the right product/service offers. Requirments The following are the minimum project requirements: You are required to create a REPORT for CallAir documenting the database design and some preliminary results once the database is developed. This should include: 1- Draw an Entit...