Networks: Friends Money and Bytes

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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.

WEEK 1
2 hours to complete
Introduction
An introduction to what we will explore in this course: 20 practical questions and their answers about your networked life.
5 videos (Total 94 min) 3 readings

2 hours to complete
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.
6 videos (Total 99 min) 2 readings

WEEK 2
1 hour to complete
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.
5 videos (Total 80 min)

2 hours to complete
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.
5 videos (Total 81 min) 2 readings

WEEK 3
2 hours to complete
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.
5 videos (Total 116 min)

2 hours to complete
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.
5 videos (Total 72 min) 2 readings

WEEK 4
1 hour to complete
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.
5 videos (Total 68 min)

2 hours to complete
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.
5 videos (Total 75 min) 2 readings


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Cung cấp bởi: Coursera /  Princeton University

Thời lượng: 37 hours
Ngôn ngữ giảng dạy: Tiếng Anh
Chi phí: Miễn phí / 0
Đối tượng: Mixed

Thông tin về nhà cung cấp

Coursera (/ kərˈsɛrə /) là một nền tảng học tập trực tuyến toàn cầu được thành lập vào năm 2012 bởi 2 giáo sư khoa học máy tính của đại học Stanford là Andrew NgDaphne Koller, nền tảng này cung cấp các khóa học trực tuyến (MOOC) cho cộng đồng người học online.

Coursera hợp tác với các trường đại học danh tiếng tại Bắc Mỹ và trên khắp thế giới, cùng với nhiều tổ chức khác để cung cấp các khóa học trực tuyến chất lượng, theo chuyên ngành và được cấp chứng chỉ trong nhiều lĩnh vực như kỹ thuật, khoa học dữ liệu, học máy, toán học, kinh doanh, khoa học máy tính, tiếp thị kỹ thuật số, nhân văn, y học, sinh học, khoa học xã hội , và nhiều ngành khác.

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