Larry's Notebook

May 30, 2014

Recent Readings: 2014 Week 13

Everything Will Be Alright*

Working for a Living:


Not Working as Designed:


March 4, 2014

Recent Readings: 2014 Week 09

Filed under: C/C++, embedded systems, microcontroller, telecom, Uncategorized, wireless — larryang @ 12:38 PM

Two large FM two-way units in the trunk of an automobile, built by Motorola in 1940. Two-way radio’s first use was with municipal police and fire departments..



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February 25, 2014

Goto Apologizes for Goto Fail (Comic) | Re/code

Filed under: Uncategorized — larryang @ 3:14 PM

Goto Apologizes for Goto Fail (Comic) | Re/code.

January 31, 2014

Recent Readings: 2014 Week 4

Society and Policy:



Embedded Development:

January 24, 2014

Recent Readings: 2014 Week 3

Filed under: Uncategorized — larryang @ 1:44 PM


When machines and computers, profit motives and property rights are considered more important than people, […]

– Rev. Dr. Martin Luther King, Jr.



November 15, 2013

Webinar: Building and Running Community Cellular Networks with OpenBTS

Filed under: free and open source, networks, telecom, wireless — larryang @ 2:08 PM

Course: Building and Running Community Cellular Networks with OpenBTS.

  • OpenBTS: An open-source GSM/SIP gateway that converts 2G GSM into standard VoIP protocols. 
  • FreeSWITCH: An open-source PBX/SIP Switch that routes all SIP traffic in the network.
  • smqueue: An open-source Short Message Service Center (SMSC) that routes SMS messages. 
  • sipauthserve: An open-source Home Location Register (HLR) that maintains the Subscriber Registry (SR)


See also:

October 11, 2013

Recent Readings Week 41

Filed under: embedded systems, FPGA, hacker culture, networks, professional — larryang @ 2:08 PM

Social Implications of Technology




September 25, 2013

World Maker Faire 2013

Filed under: Uncategorized — larryang @ 10:56 AM

I attended Maker Faire, which was a blast. I attended Zero to Maker: Getting to Speed with the Maker Movement (got a book signed by David Lang) and The Industrial Age is Over: Welcome to the Maker Age with Douglas Rushkoff. There were many interesting talks and presentations – archived videos from the main and live stages are at Maker Faire | Live.

A shout out to Makerbar and the members of Makerbar who put together the Orbital Rendersphere (five Editor’s Choice awards!).  After helping dismantle their stand, we hung out together afterwards in Flushing, consuming soup dumplings (xiao long bao) and other delicious Shanghainese foods.

World Maker Faire Media Coverage:

August 16, 2013

Recent Readings Week 31

Filed under: Uncategorized — larryang @ 9:46 AM

We’re Terrible Listeners — And Here’s Why

Instead, I’m going to give you a different take on why we don’t listen. It’s because we think we’re important. We think we’re more important than our colleagues and associates. We’re more important than people we don’t know. We’re more important than our boss, than the barista who makes our morning latte, the admin assistant in our department, or the security guy who roams the parking lot. We’re more important.


  • VoLTE: Changing the Conversation – there’s more than a few ways to implement it – not clear what implementations are friendly to handsets and to business models.
  • OSI: The Internet That Wasn’t: “How TCP/IP eclipsed the Open Systems Interconnection standards to become the global protocol for computer networking”


July 24, 2013

Recent Readings Week 30

I’ve been kicking around the idea of using Git as a “backdoor” to ClearCase/UCM – see this blog post at We’ll use ClearCase UCM on a Unix/Linux machine then access/share the code via Git on Windows PC.

• how to set Git up with multiple ClearCase branches
• how much work is to keep everything in sync
• how to automatically propagate changes from ClearCase to Git
• how to automatically propagate changes from Git to ClearCase
• how to do code inspections – metrics are collected and analyzed




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