March/April issue of acmqueue

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Originally published in Queue vol. 7, no. 6
see this item in the ACM Digital Library



Ivar Jacobson, Ian Spence, Ed Seidewitz - Industrial Scale Agile - from Craft to Engineering
Essence is instrumental in moving software development toward a true engineering discipline.

Andre Medeiros - Dynamics of Change: Why Reactivity Matters
Tame the dynamics of change by centralizing each concern in its own module.

Brendan Gregg - The Flame Graph
This visualization of software execution is a new necessity for performance profiling and debugging.

Ivar Jacobson, Ian Spence, Brian Kerr - Use-Case 2.0
The Hub of Software Development


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Stan Kelly-Bootle | Fri, 14 Aug 2009 18:15:50 UTC

Splendid riposte, Paul. I have been on the front row for a Myriam Makeba concert. Whether the clicks themselves emitted CO2 was not clear at the time, but I bow to your correction. In fact, all languages have a variety of sounds each with different /carbon-mouth-prints/. Xhosa has a full repertoire of phonemes besides the Western-ear-catching so-called /exotic/ clicks. I can imagine Xhosa speakers being annoyed when asked to sing a /click song/ Rather as if they asked me to sing a TH-song? All speakers must breathe in and out (or die). It's probably /greener/ to sit and chat in language than to jog around in silence. Cheers, Stan

Paul Keating | Tue, 04 Aug 2009 21:05:21 UTC

Xhosa clicks cause no outflow of breath. The energy for the sound comes from increasing the size of the mouth cavity. Were that not enough, Xhosa also has an implosive b that causes an (extremely brief) net inflow of breath. Be linguistically carbon-neutral! Learn and speak Xhosa!

I wouldn't make this comment except it's August.

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