Assignment 2 starts the transformation of OS/161 into a true multi-tasking operating system. After the next assignment, it will be capable of running multiple processes at once from actual compiled programs stored in your account. PotPlayer 1.7.21482 10 similar apps in Video Players; WhatsApp for Android 2.21.9.5 Popular app in Instant Messaging; Drivers. Apple iPhone iOS 14.5 Firmware Update; Apple iPad iOS 14.5 Firmware. Get your assignment help services from professionals. Cheap essay writing sercice. If you need professional help with completing any kind of homework, Online Essay Help is the right place to get it. As with Assignment #1, you're limited to a maximum of three late days on this assigment. Don't forget that the in-class midterm is scheduled for May 10, so we recommend starting this one early! Note: Please be sure you have Python 2.7.x installed on your system.
Programming Assignment 1: Percolation
Write a program to estimate the value of the percolation thresholdvia Monte Carlo simulation.
Install a Java programming environment.Install a Java programming environment on your computer by followingthese step-by-step instructions for your operating system[Mac OS X·Windows·Linux]. After following these instructions you will have stdlib.jarand algs4.jarin your Java classpath:the former contains libraries for reading data from standard input,writing data to standard output, drawing results to standard draw, generating random numbers,computing statistics, and timing programs;the latter contains all of the algorithms in the textbook.
Percolation.Given a composite systems comprised of randomly distributed insulating and metallicmaterials: what fraction of the materials need to be metallic so that the composite system is an electrical conductor? Given a porous landscape with water on the surface (or oil below),under what conditions will the water be able to drain through to the bottom (or theoil to gush through to the surface)?Scientists have defined an abstract process known as percolationto model such situations.
The model.We model a percolation system using an N-by-N grid of sites.Each site is either open or blocked.A full site is an open sitethat can be connected to an open site in the top row via a chain ofneighboring (left, right, up, down) open sites.We say the system percolates if there is a full site in the bottom row.In other words, a system percolates if we fill all open sitesconnected to the top row and that process fills some opensite on the bottom row. (For the insulating/metallic materials example, the open sites correspondto metallic materials, so that a system that percolates has a metallic path from top to bottom, with full sites conducting.For the porous substance example, the open sites correspond to empty space through which water might flow, so that a system that percolates lets water fill open sites, flowing from top to bottom.)
The problem.In a famous scientific problem, researchers are interested in thefollowing question: if sites are independently set to be open withprobability p (and therefore blocked withprobability 1 − p), what is the probability that the system percolates?When p equals 0, the system does not percolate; when p equals 1,the system percolates.The plots below show the site vacancy probability p versus the percolationprobability for 20-by-20 random grid (left) and 100-by-100 random grid (right).
When N is sufficiently large, there is a threshold value p* suchthat when p < p* a random N-by-N grid almost never percolates, and when p > p*,a random N-by-N grid almost always percolates.No mathematical solution for determining the percolation threshold p*has yet been derived.Your task is to write a computer program to estimate p*.
Percolation data type.To model a percolation system, create a data type Percolation with the following API:
Corner cases. By convention, the row and column indices i and jare integers between 0 and N − 1, where (0, 0) is the upper-left site:Throw a java.lang.IndexOutOfBoundsExceptionif any argument to open(), isOpen(), or isFull()is outside its prescribed range.The constructor should throw a java.lang.IllegalArgumentException if N ≤ 0.
Performance requirements. The constructor should take time proportional to N2; all methods shouldtake constant time plus a constant number of calls to the union-find methods union(), find(), connected(), and count().
Assignment 1 Mac Os Download
Monte Carlo simulation.To estimate the percolation threshold, consider the following computational experiment:
- Initialize all sites to be blocked.
- Repeat the following until the system percolates:
- Choose a site (row i, column j) uniformly atrandom among all blocked sites.
- Open the site (row i, column j).
- The fraction of sites that are opened when the system percolatesprovides an estimate of the percolation threshold.
For example, if sites are opened in a 20-by-20 grid according to the snapshots below,then our estimate of the percolation threshold is 204/400 = 0.51 because the systempercolates when the 204th site is opened.
Assignment 1 Mac Os 11
50 open sites | 100 open sites | 150 open sites | 204 open sites |
By repeating this computation experiment T times and averaging the results,we obtain a more accurate estimate of the percolation threshold.Let xt be the fraction of open sites in computational experiment t.The sample mean μ provides an estimate of the percolation threshold;the sample standard deviation σ measures the sharpness of the threshold.
Assuming T is sufficiently large (say, at least 30), the followingprovides a 95% confidence interval for the percolation threshold:To perform a series of computational experiments, create a data type PercolationStatswith the following API.
The constructor should throw a java.lang.IllegalArgumentExceptionif either N ≤ 0 or T ≤ 0.The constructor should take two argumentsN and T, and perform T independentcomputational experiments (discussed above) on an N-by-N grid. Using thisexperimental data, it should calculate the mean, standard deviation, and the 95% confidence interval for the percolation threshold. Use standard random from stdlib.jar to generate random numbers;use standard statistics from stdlib.jar to compute thesample mean and standard deviation.
Analysis of running time and memory usage. Implement the Percolation data type using the quick-find data typeQuickFindUF.javafrom algs4.jar.
- Use the stopwatch data type from stdlib.jar to measure the total running time of PercolationStats.How does doubling N affect the total running time?How does doubling T affect the total running time?Give a formula (using tilde notation) of the total runningtime on your computer (in seconds) as a single function of bothN and T.
- Using the 64-bit memory-cost model from lecture and Section 1.4,give the total memory usage in bytes (using tilde notation) that a Percolationobject uses to model an N-by-N percolation system.Count all memory that is used, including memory for the union-find data structure.
Please wait until after Tuesday's lecture (Analysis of Algorithms) to answer these questions.
Deliverables.Submit only Percolation.java (using the weighted quick-union algorithm as implemented in the WeightedQuickUnionUF class)and PercolationStats.java.We will supply stdlib.jar and WeightedQuickUnionUF.java.On this assignment, the only library functions you may call are those injava.lang, stdlib.jar, and WeightedQuickUnionUF.java.Also, submit a readme.txt file andanswer all questions. You will need to read the COS 226 Collaboration Policyin order to answer the related questions in your readme file.
This assignment was developed by Bob Sedgewick and Kevin Wayne.Copyright © 2008.
Unit 4 Lab Report 1: Apple MAC OS X
| Introduction to Operating Systems | Unit 4 |
| Interaction Presentation | Apple MAC OS X Labs |
Mac Os Download
Objective: At the conclusion of this lab the student will be able to personalize and perform maintenance tasks in the MAC environment.
Resources required: Microsoft Office Powerpoint,
Topology Map –N/A
Instructions
Step 1
Please complete the interactive Apple MAC OS X presentation before you complete this lab report.
Step 2
Reflection: As a result of this lab you learned to do _________. Space toads mayhem mac os. Answer the following questions about this learning activity:
- Name at least two gesture touch features offered with the MAC OS X. Explain what each does.
- How do you quickly move from one item to the next on a MAC desktop without using the mouse?
- How do you customize the MAC OS X desktop?
- Why is the DOCK useful on the MAC OS X?
- What are all the folders located on the DOCK called?
- List five default apps that come with the MAC OS X?
- Why is the terminal useful to MAC OS X users?
- What is a Smart Folder and why is it useful?
- What character is used as the present working directory on a MAC OS X terminal command line?
- List three commands used in the MAC terminal command line. Explain each command.
Survey
On a scale of 1-10 (10 being best) rate this lab based on following:
| Clarity of Objective |
| Ability to meet the objective |
| Value to you as a learning tool |
| Technical accuracy |
List any steps in which you found errors or poor wording: _______________________________
List one thing that would improve this lab for you _________________________
Submission: Save as CIS106_U4_Lab1_FirstName.docx. Submit the completed lab report.
Grading Rubric
Student followed instructions to complete the lab successfully.
| 0 | 10-20 | 20-30 | 30-40 | 50 |
| Not submitted/not attempted | Started lab, but work lacks understanding of concepts & skills | Step Mostly completed & work shows some understanding of concepts & skills | Steps completed but not accurately & work reflects some understanding of concepts & materials | All steps completed & work shows mastery of skills, concepts, & materials |
Student reflections/answers suggest learning of the objective occurred.
| 0 | 10-20 Unsatisfactory | 20-30 Competetent | 30-40 Proficient | 50 Mastery |
| Not submitted | Started reflections, student shows minimal effort, work lacks understanding of concepts, materials & skills | Reflections mostly completed, student does just enough to meet requirements, but work shows some understanding but student cannot explain/justify answers | Reflection portion inadequate, students work is neat, most answers are complete and justified but not all | All questions satisfactory, student completed work on time, shows excellent & completeness in answers/reflections |
All papers are written by ENL (US, UK, AUSTRALIA) writers with vast experience in the field. We perform a quality assessment on all orders before submitting them.
Do you have an urgent order? We have more than enough writers who will ensure that your order is delivered on time.
We provide plagiarism reports for all our custom written papers. Asylum night shift mac os. All papers are written from scratch.
Contact us anytime, any day, via any means if you need any help. You can use the Live Chat, email, or our provided phone number anytime.
We will not disclose the nature of our services or any information you provide to a third party.
Assignment 1 Mac Os X
Get your money back if your paper is not delivered on time or if your instructions are not followed.
