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Comment: Re:Field dependent requirement (Score 1) 1086

by ZygnuX (#40937231) Attached to: Ask Slashdot: How Many of You Actually Use Math?
Working in the area of Li Ion battery state of charge estimation and prognosis, I promise we would all be baffled at how easily you can solve the problem with a LUT. You are completely ignoring the evolution of the battery, the ambient effects, the non linear nature of a battery, the regeneration effects, etc, which have a BIG impact. Kalman and Particle Filtering are used not for the laughs, but because they are necessary to have even a DECENT approximation of the remaining charge.

Comment: Re:Field dependent requirement (Score 1) 1086

by ZygnuX (#40937165) Attached to: Ask Slashdot: How Many of You Actually Use Math?
You are assuming that every battery has the same decay rate, and capacity, which is wrong. There is a lot of mathematics involved in estimating a battery charge, and it has its own name fancy name: State of Charge Estimation (SoC) and Remaining Useful Life estimation (RUL). For Li-Ion batteries, estimating the SoC involves having a model of the battery (which actually involves a lot of math), and a method for extrapolating the SoC based on a number of things: battery health, charge use profiles, etc. This is usually done by mathematical estimation and prognosis methods: Kalman Filtering (EKF, UKF) and Particle Filtering (AKA Monte Carlo) are two great approaches. You can't assume everything is constant and linear all the time, and you cannot assume that every battery is equal (not even same model/make batteries are equal in terms of charge and discharge).

Comment: Re:Confused...and performance is a problem... (Score 1) 193

by ZygnuX (#39631643) Attached to: Ask Slashdot: Finding a Trustworthy VPN Service?

Latency is a problem when you're waiting for keystrokes or weapons fire to be transmitted 'twixt server and client, but it is a total non-issue while watching streaming video with a buffer measured in minutes.

Mod parent up.. If streaming video is the necessity, 50ms or 300ms don't really make a difference when buffering.

Comment: Re:Looking for family in Japan (Score 1) 431

by ZygnuX (#35454134) Attached to: 8.8 Earthquake Near Japanese Coast
I live in Chile and experienced the massive comms breakdown after the earthquake. Best advice is NOT to use telephone at all, you are just making it harder for everyone, including emergency services. Best way to get information is using http://japan.person-finder.appspot.com/?lang=en, email, sms, facebook and other types of asynchronous communication. Be sure to post contact info of people you are searching for on a place they or their friends can see. Rest assured that odds are they are OK, but just incommunicated. Also sending emails to Police/Firefighter stations in Tochigi with info about the people you look for is a good idea. Just once though. My thoughts go with you and your familiy.

Comment: Re:Sexting (Score 1) 146

by ZygnuX (#30640112) Attached to: The Top 5 Technology Panics of 2009
Well, the same could happen if instead of nude pics, they were her panties, or a very cheesy love letter, or a webcam striptease, or anything you might call private and part of a love relationship. Does that mean that we have tu punish the girl? Nope. Does that mean we (her parents, school, whatever) have to teach her better? Definitely. Criminalizing (Does that word exist?) something doesn't teach you better.

Asynchronous inputs are at the root of our race problems. -- D. Winker and F. Prosser

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