Larry’s Notebook

May 29, 2009

Dr. Dobb’s | Go Parallel

May 13, 2009

Whole-Building Energy Analysis through Wireless Networked Sensing

Filed under: Uncategorized — larryang @ 9:33 pm

May 11, 2009

TechOnline | Exactly When Do You Need Realtime?

Filed under: embedded systems — larryang @ 2:06 pm

May 4, 2009

WOCC: Wireless & Optical Communications Conference 2009

Filed under: Uncategorized — larryang @ 4:04 pm

I recently attended: WOCC: Wireless & Optical Communications Conference 2009.

I mostly attended the wireless sessions. What I found new and interesting was cooperative networks and wireless sensor networks.

April 20, 2009

Perils of Counting with a Signed Short Integer

Filed under: C/C++, embedded systems — larryang @ 3:34 pm

April 10, 2009

Help Wanted: Embedded Engineers

Filed under: Uncategorized — larryang @ 7:14 pm

Help Wanted: Embedded Engineers

Why the United States is losing its edge in embedded systems…

via IEEE-USA Todays Engineer.

April 4, 2009

The need for speed | The Economist

Filed under: telecom, wireless — larryang @ 5:36 pm

Or, why I still have a job. Thanks iPhone!

Wireless communications | The need for speed | The Economist.

I’ve also pondered the LTE vs. WiMAX. While which technology wins will largely determined by incumbency, I just think the people behind LTE just have the experience and the accompanying better grasp of what it takes to build a massive mobile wireless network. The physical layer hardly matters (see IS-95 vs. GSM).

April 2, 2009

WiFi Tomato

Filed under: linux/unix, wireless — Tags: — larryang @ 10:34 pm

My old wireless 802.14 router/access point died. In between the Wii, Chumby, and iPhone 3G, a functioning WiFi is nearly a necessity.

But any old access point won’t do; it’s gotta be able support replacement firmware. I settled on Tomato Firmware and the Buffalo WHR-HP-G54. The Tomato Firmware has a slick interface (much nicer than the manufacturer’s) and offers a ssh server, wake-on-lan, and https. It also scans all the nearby networks.

Installation went as described in documentation. For a working configuration, I disabled DHCP service and changed the IP address to one on my subnet. The final troublesome configuration was to set the static DNS server to the default gateway (the default gateway acts like a DNS server, but actually just forwards them, I think). I discovered this issue when attempting to set the time via NTP; the router could not resolve the NTP server address.

April 1, 2009

On My Reading List

Filed under: telecom — Tags: , — larryang @ 10:55 pm

Great scholarly book on telecoms policy, the Internet and innovation – Boing Boing looks like great reading material, and the PDF is free to download.

March 23, 2009

xkcd – Students

Filed under: Uncategorized — larryang @ 10:18 pm

I’ve had this dream before too…

Students

via xkcd – A Webcomic – Students.

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