What to do with Hard Problems?
Sometimes we end up with a situation where our boss tells us to write a fast algorithm to solve a problem, but we try and fail. We will learn how to prove that the problem is hard, and that we're not going to find one.
C hapte 5 r Link Laye and LANs r
All material copyright 1996-2007 J.F Kurose and K.W. Ross, All Rights Reserved 5: DataLink Layer 5-1
C hapte 5: TheData Link Laye r r
Our goals:
unde rstand principle be s hind data link laye se s: r rvice re rror de ctio
Chapter 3 Transport Layer
Chapter 3: Transport Layer
Our goals: understand principles behind transport layer services:
multiplexing/demultipl exing reliable data transfer flow control congestion control
learn about transport layer protocols in the Interne
Peer-to-Peer File Sharing Systems
Peer-to-Peer: decentralized computing model What is a Peer?
Information producer, disseminator, or consumer.
Some Popular P2P Systems
Why is it useful?
Solves some problems of client/server model, like;
hot spots surro
Wireless Mesh Networks Wireless
WIRELESS MESH NETWORKS
The term 'wireless mesh networks' describes wireless The networks in which each node can communicate directly with one or more peer nodes. The term 'mesh' originally used to suggest that all nodes The
The World Wide Web
Caching
The WWW can be considered as a large distributed information system. Exponential growth in size. On may 1999 included 600 millions of static web pages. Increases 15% per month. Very popular. 600
500 400 300 200 100 0 Jun-97 Nov-
C hapte 6 r Wire ss and MobileNe le tworks
All material copyright 1996-2007 J.F Kurose and K.W. Ross, All Rights Reserved
6: Wire ss and MobileNe le tworks
6-1
Chapte 6: Wire ss and MobileNe r le tworks
Background:
# wire ss (m le obile phonesubscribe no
Chapter8 NetworkSecurity
All material copyright 1996-2007 J.F Kurose and K.W. Ross, All Rights Reserved 8: Network Security 8-1
Chapter8:NetworkSecurity
Chaptergoals: understandprinciplesofnetworksecurity:
r
securityinpractice: r firewallsandintrusiondet
CSE 830: Design and Theory of Algorithms
Homework #5: Due Thursday, April 23rd 2015, 12:40pm
1. Graph-isomorphism (determining whether two graphs have identical structure) is an open
problem; no one has been able to prove it to be a NP-Hard, yet no polyno
CSE 830: Homework #3: Dynamic Programming
Due March 3rd, 12:40pm
1. Making Change: The natural greedy algorithm for making change of n units using the
smallest number of coins is: Include one unit of the highest denomination coin of at most n units,
say d
CSE 830: Homework #4
Due: Tuesday, March 24th, 12:40pm
1. In breadth-first and depth-first search, an undiscovered node is marked discovered when it is first
encountered, and marked completely-explored when it has been searched. At any given moment,
vario
Computer Science 830: Design and Theory of Algorithms
Homework #1
Due January 27th 2015, 12:40pm
Each full problem should be solved on a separate sheet of paper to facilitate grading. You
should need at most one side of a sheet of paper per sub problem (a
CSE 830: Homework #2
Due February 10th, 12:40pm
For all questions that ask you to produce an algorithm with a specific time complexity, you must justify
your answer to receive full credit.
1. Go to http:/www.Hackerrank.com and create an account (Sign Up).
CSE 830: Homework #2
Due Sept. 29th 2011, 10:20am
1. Use the partitioning step of quicksort to give an algorithm that finds the median element of an unsorted
array of n integers in expected O(n) time.
2. Outline an efficient method of solving each of the
Anonymity
1
Anonymity
Supreme Court Justice Louis Brandeis defined privacy as "the right to be let alone", which he said was one of the rights most cherished by Americans. Who is talking to whom may be confidential or private:
Who is searching a public
CSE824 Advanced Computer Networking and Communications
Topics
Computer Networks and the Internet, including
Application layer, Transport layer, Network layer and routing, Link layer and local area networks, Wireless and mobile networks, Multimedia network
CSE 830: Design and Theory of Algorithms Sample Questions for Exam #2 Spring 2008
1. Graph Traversal. Given the following graph, determine the orders that both Breadth-FirstSearch and Depth-First-Search would traverse (mark as `discovered') the verti
Why don't CS profs ever stop talking about sorting?!
Computers spend more time sorting than anything else, historically 25% on mainframes. Sorting is the best studied problem in computer science, with a variety of different algorithms known. Most
CSE 830: Design and Theory of Algorithms
Homework #3 Due Monday, Feb. 18th 2008, 3pm
Each problem should be solved on a separate sheet of paper to facilitate grading. Limit the solution of each problem to one sheet of paper. Please don't wait until t
Recurrence Relations
Overview
Recurrence Relations
Techniques for solving them
Methods for generating a guess Induction proofs Master Theorem
Where do recurrence relations come from?
Analysis of a divide and conquer algorithm
Towers of Hano
The Set Cover Problem
In the U.S. navy, the SEALS are each specially trained in a wide variety of skills so that small teams can handle a multitude of missions. If there are k different skills needed for a mission, and n SEAL members that can be assi
CSE 830: Design and Theory of Algorithms
Quicksort!
Dr. Charles Ofria
Quicksort
Although mergesort is O( n log n ), it is difficult to implement on arrays since we need space to merge. In practice, Quicksort is the fastest sorting algorithm. Exampl
CSE 830: Design and Theory of Algorithms
Homework #4 Due Monday, March 17th 2008, 3pm
1. Is the path between a pair of vertices in a minimum spanning tree necessarily the shortest path between the two vertices in the full graph? Give a proof or a cou
Dynamic Sets and Data Structures
Basic Data Structures and Analysis Hash Tables Binary Search Trees
Dynamic Sets and Data Structures
Over the course of an algorithm's execution, an algorithm may maintain a dynamic set of objects The algorithm w
CSE 830: Design and Theory of Algorithms
Dr. Eric Torng [email protected] 2144 EB
Algorithm Analysis Overview
RAM model of computation Concept of input size Measuring complexity
Best-case, average-case, worst-case Asymptotic notation
Asymptotic
Computer Science 830: Design and Theory of Algorithms
Dr. Charles Ofria Homework #1 Due January 23rd 2008, 3pm
Each of the problems should be solved on a separate sheet of paper to facilitate grading. Limit the solution of each question to one side o