Об этом курсе
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You pick up your iPhone while waiting in line at a coffee shop. You google a not-so-famous actor, get linked to a Wikipedia entry listing his recent movies and popular YouTube clips of several of them. You check out user reviews on Amazon and pick one, download that movie on BitTorrent or stream that in Netflix. But suddenly the WiFi logo on your phone is gone and you're on 3G. Video quality starts to degrade, but you don't know if it's the server getting crowded or the Internet is congested somewhere. In any case, it costs you $10 per Gigabyte, and you decide to stop watching the movie, and instead multitask between sending tweets and calling your friend on Skype, while songs stream from iCloud to your phone. You're happy with the call quality, but get a little irritated when you see there're no new followers on Twitter. You may wonder how they all kind of work, and why sometimes they don't. Take a look at the list of 20 questions below. Each question is selected not just for its relevance to our daily lives, but also for the core concepts in the field of networking illustrated by its answers. This course is about formulating and answering these 20 questions....
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Только онлайн-курсы

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Назначьте сроки сдачи в соответствии со своим графиком.
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Предполагаемая нагрузка: 5 hours/week

Прибл. 14 ч. на завершение
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Программа курса: что вы изучите

1

Раздел
Clock
2 ч. на завершение

Introduction

An introduction to what we will explore in this course: 20 practical questions and their answers, about your networked life....
Reading
5 видео (всего 94 мин.), 3 материалов для самостоятельного изучения
Video5 видео
Preview of Questions 1–1022мин
Preview of Questions 11–2020мин
Methods and Course Concepts15мин
Course Logistics27мин
Reading3 материала для самостоятельного изучения
About Us10мин
Suggested Readings and Links10мин
Contact us10мин
Clock
2 ч. на завершение

What Makes CDMA Work for My Smartphone?

We study cellular network technology, the air interface between end-user devices and base stations, and an important algorithm which has been developed to manage interference between our devices as they share this medium: Distributed Power Control. ...
Reading
6 видео (всего 99 мин.), 2 материалов для самостоятельного изучения
Video6 видео
Distributed Power Control (DPC)9мин
DPC through Optimization16мин
DPC as a Game21мин
Numerical Example and Summary18мин
Resource Allocation18мин
Reading2 материала для самостоятельного изучения
Homework10мин
Homework Solutions10мин

2

Раздел
Clock
1 ч. на завершение

How Does Google Sell Ad Spaces?

How does Google sells the ads that appear on its search results page through auctions? We learn about different types of auction mechanisms, including those for single and multiple items. QUESTION 3: We explore PageRank, the famous algorithm that underlies how Google orders its list of search results whenever we type in a query....
Reading
5 видео (всего 80 мин.)
Video5 видео
Auction Definitions10мин
Second Price Single Item Auction20мин
Generalized Second Price (GSP) Auction and Numerical Example20мин
Vickrey–Clarke–Groves (VCG) Auction8мин
Clock
2 ч. на завершение

How Does Google Rank Webpages?

In this lecture, we will explore PageRank, the famous algorithm that underlies how Google orders its list of search results whenever we type in a query....
Reading
5 видео (всего 81 мин.), 2 материалов для самостоятельного изучения
Video5 видео
Webgraphs and the H Matrix25мин
Handling Dangling Nodes9мин
The Google Matrix10мин
Numerical Example and PageRank in Practice12мин
Reading2 материала для самостоятельного изучения
Homework10мин
Homework Solutions10мин

3

Раздел
Clock
2 ч. на завершение

How Does Netflix Recommend Movies?

As a user of Netflix, you may have had movies recommended for you to watch. Behind the scenes, Netflix is leveraging powerful machine learning to determine which will be recommended to you specifically. In this lecture, we will study some of the fundamental algorithms that have been used for this purpose....
Reading
5 видео (всего 116 мин.)
Video5 видео
The Netflix Prize and Its Challenges23мин
The Baseline Predictor31мин
Similarity and Neighborhood Predictor16мин
Numerical Example and Summary21мин
Clock
2 ч. на завершение

When Can I Trust an Average Rating on Amazon?

The decision of whether or not to make an online purchase is often driven by feedback that has been left by past customers, commonly in the form of star ratings. In this lecture, we will study Amazon's review system. In doing so, we will explore some of the methods for, and challenges behind, rating aggregation....
Reading
5 видео (всего 72 мин.), 2 материалов для самостоятельного изучения
Video5 видео
Key Factors and Assumptions10мин
The Wisdom of Crowds12мин
Bayesian Ranking18мин
Reverse Engineering Amazon19мин
Reading2 материала для самостоятельного изучения
Homework10мин
Homework Solutions10мин

4

Раздел
Clock
1 ч. на завершение

Why Does Wikipedia Even Work?

In this lecture, we focus on the concepts of crowdsourcing and consensus formation, which are two of the mechanisms allowing Wikipedia to be both a scalable and (reasonably) accurate encyclopedia. In particular, we will look at different voting systems, which are ways of determining consensus from a collection of individual preferences....
Reading
5 видео (всего 68 мин.)
Video5 видео
Bargaining 13мин
Voting16мин
Arrow's Axioms and Impossibility Result12мин
Sen's Axioms and Numerical Examples9мин
Clock
2 ч. на завершение

How Do I Viralize a Youtube Video?

In this lecture, we will study models that have been developed for the popularity of products over time, motivated by the phenomenon of videos going "viral" on YouTube. Overall, the theme will be the dependence of opinions, as opposed to the wisdom of crowds discussed in the previous two lectures....
Reading
5 видео (всего 75 мин.), 2 материалов для самостоятельного изучения
Video5 видео
Population Based Models5мин
Sequential Decision Making and Information Cascade27мин
Correct vs Incorrect Cascades14мин
Tipping Models13мин
Reading2 материала для самостоятельного изучения
Homework10мин
Homework Solutions10мин

Преподавателя

Mung Chiang

Professor
Electrical Engineering

Christopher Brinton

Lecturer
Electrical Engineering

О Princeton University

Princeton University is a private research university located in Princeton, New Jersey, United States. It is one of the eight universities of the Ivy League, and one of the nine Colonial Colleges founded before the American Revolution....

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