Viewing profile — hchenji

very interesting!! Do you have a source for this? Would like to read up on it

Yes. See Haar Basis on page 4 of http://www.fourierandwavelets.org/FSP_v1.1_2014.pdf

Lectures and video from http://www.cse.wustl.edu/~jain/cse574-16/index.html Book: https://www.pearsonhighered.com/program/Beard-Wireless-Commu...

In my experience WiFi clients at 2.4GHz never end up using the high MCS indices whenever they transmit (whenever the channel is clear). This has something to do with the fact that …

See my comment https://news.ycombinator.com/item?id=13793876 . I suggest reading Andrea Goldsmith's or Pramod Vishwanath's book on Wireless Communication. If not, Intro to Communic…

Reducing transmit power reduces interference, but it also reduces capacity since the received power (and hence the SNR at the receiver) is reduced! The Shannon limit on channel cap…

802.11ax won't mean anything unless you reduce interference (see my reply below). Without high SNR, all these new efficiency techniques won't get you anything. Shannon capacity is …

The article misses out on explaining WHY we cannot get the promised bitrates. The answer is Shannon's limit on channel capacity, which mandates that you pay in either bandwidth or …

No, since wired networks are full duplex and are their own collision domains. No need to do carrier sensing at all.

You mean like 3G/4G/LTE?

You can also do channel bonding on 5G and use 40MHz channels. Almost double the capacity!

Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. — Tanenbaum, Andrew S. (1989). Computer Networks. New Jersey: Prentice-Hall. p. 57. IS…

What would be more interesting is the internals of numpy. What is it that makes numpy 'blazing fast'? Instead, there is only high school level math in the article, with dot product…

Then why not Dijkstra + source routing?

Use a Pseudoinverse or a decomposition instead. A great book to read is Matrix Computations by Golub/van Loan.

Any idea why they chose DV based routing? Looks like they have ignored about 20 years of Wireless Sensor Networks/cyber-physical systems research.

Interesting read. Could you blog about the math/techniques/algorithms you used to determine the best fiber paths? Consider writing a SIGCOMM paper about it!!

Why doesn't the article mention Southwest Airlines??

So can we use it in a macbook somehow with a usb air interface?

EE degrees yes definitely. I wish CS students learnt it too. Every fancy language du jour eventually has to generate machine code after all.

Yeah but if GNULinux is free in the first place, why spend so much govt. money on it?

Just because borders are open does not mean that people will immediately move. That said, CA and RI have similar quality of life, but Africa and North American probably do not. So …

https://www.numbersusa.com/

Yes I agree...instead of importing low skilled labor, we should import highly skilled immigrants. Increasing the H1B and employment based greencard quotas is absolutely necessary.

The Wire (season 2) gives an excellent insight into how docks are run (Baltimore). There's even a scene where some Dutch company wants to bring Rotterdam's automation to Baltimore.…