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Communications of the ACM

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The blog archive provides access to past blog postings from Communications of the ACM and other sources by date.

December 2008


From insideHPC

Green HPC in Scientific Computing

Green HPC in Scientific Computing

Twitter user erincollopy points us to this article at hpcprojects.com (a subsite of Scientific Computing World) on the greening of HPC HPC suppliers are addressing this problem on a number of fronts: at the chip level, at the…


From insideHPC

Rackable

Rackable

Last week Rackable announced a new “data center enclosure” for your gear. You can slot in either AMD or Intel servers, but they’ll have to be Rackable’s, since they are made to hold the company’s half-depth servers MobiRack enclosures…


From insideHPC

Sun Compute Cluster part of new Rapid Solutions

Sun Compute Cluster part of new Rapid Solutions

Sun announced last week a new services offering tied to its hardware and designed to help customers get their installation done faster. Mostly this is done by pre-packaging solutions — this controls options and let’s Sun streamline…


From insideHPC

New computer memory possible with good old-fashioned pencil

New computer memory possible with good old-fashioned pencil

Scientists at Rice have found a way to create a new kind of memory from a strip of graphene, the stuff that in bulk is called graphite, and drives No 2 pencils the world over Rice professor James Tour says that graphene memory…


From CSDiary

Merry Christmas!

Merry Christmas!

The semester is over, but there is still enough work to do on various proposals, recommendation letters, and think pieces that I am in my office instead of at home watching the Steelers game. (Probably a good thing, since the…


From The Eponymous Pickle

Seeing 1859 Stereo

Seeing 1859 Stereo

I enjoy discussions linking the history of a technology to its current state. This article looks at the stereographic technology of 1859 and how it relates to the cellphone technology of today. Also how you can experiment with…


From The Eponymous Pickle

Behind the Way We Shop

Behind the Way We Shop

National Public Radio (NPR) audio recording on Buyology/Neuromarketing: The Buyology Behind the Way We Shop


From Wild WebMink

Open Source Maturity

Open Source Maturity

There's an interesting comment from 451 Group's Matthew Aslett on the five stages of community open source engagement that's worth reading. I've been using a model something like this for quite a while too. It's interesting to…


From The Eponymous Pickle

Generating Power in Clothing

Generating Power in Clothing

From Zhong Lin Wang's lab:Nano generator that can be grown over fibers.Generates energy by human movements.Ottilia Saxl, chief executive of the Institute of Nanotechnology, believes the technology could also find a use in healthcare…


From insideHPC

UCAR Releases VAPOR

UCAR Releases VAPOR

UCAR has announced the latest release of the Visualization and Analysis Platform, or VAPOR application.


From insideHPC

CIBC Winter Workshop

CIBC Winter Workshop

Through the SCIRUN-USERS mailing list, Rob MacLeod announced the 2008/2009 Center for Integrative Biomedical Computing [CIBC] Winter Workshop: Boston Edition.


From Putting People First

Watch the video - Mobile Banking for Poor People: Pioneer Perspectives

Watch the video - Mobile Banking for Poor People: Pioneer Perspectives

Last week, the World Bank’s CGAP hosted a roundtable and webinar on the important topic of how mobile phone banking can deliver a range of financial services to poor people and change lives for the better (see also this blog…


From The Eponymous Pickle

Blowing into your Cell Phone

Blowing into your Cell Phone

There have been a number of keyboard instruments for the IP, so when I first read of a wind instrument app I thought ... how would that work? There is an Ocarina app. You blow into the mic, which is real genius. It converts…


From Daniel Lemire's Blog

Parsing CSV files is CPU bound: a C++ test case (Update 2)

Parsing CSV files is CPU bound: a C++ test case (Update 2)

I am continuing my fun saga to determine whether parsing CSV files is CPU bound or I/O bound. Recall that I posted some C++ code and reported that it took 96 seconds of process time to parse a given 2GB CSV file and just 27 seconds…


From The Eponymous Pickle

Image Search

Image Search

Via Google Blogoscoped I see that Google Image search now has some new advanced options which lets you search for just clip art or line drawings. Also previously included a 'faces' category. Works well. Useful for looking…


From The Computing Community Consortium Blog

Computing Research Initiatives for the 21st Century

Computing Research Initiatives for the 21st Century

Today’s main message is: Check out http://www.cra.org/ccc/initiatives. Please! And tell your friends and colleagues! (Any reactions or suggestions can be posted here as comments on this article.) Now, the full story: The CCC’s…


From Daniel Lemire's Blog

Parsing CSV files is CPU bound: a C++ test case (Update 1)

Parsing CSV files is CPU bound: a C++ test case (Update 1)

(See update 2.) In a recent blog post, I said that parsing simple CSV files could be CPU bound. By parsing, I mean reading the data on disk and copying it into an array. I also strip the field values of spurious white space. You…


From U.S. Public Policy Committee of the ACM

ACM Urges Obama To Include Computer Science As A Core Component Of Science And Math Education

ACM Urges Obama To Include Computer Science As A Core Component Of Science And Math Education

Yesterday President-Elect Obama announced his intention to nominate Arne Duncan for the Secretary of Education. Mr. Duncan is currently CEO of Chicago's school system. On the heels of this announcement, ACM's Education Policy…


From Daniel Lemire's Blog

Fast argmax in Python

Fast argmax in Python

In my post Computing argmax fast in Python, I reported that Python has no builtin function to compute argmax, the position of a maximal value. I provided one such function and asked people to improve my solution. Here are the…


From Daniel Lemire's Blog

The Synthese Recommender System

The Synthese Recommender System

Andre Vellino has just opened his Synthese Recommender System: a recommender for journal articles. Andre works for one of the largest scientific libraries in the world (CISTI). You can read all about his project on his blog.


From Daniel Lemire's Blog

Parsing CSV files is CPU bound: a C++ test case

Parsing CSV files is CPU bound: a C++ test case

(These results were updated.) In Parsing text files is CPU bound, I claimed that I had a C++ test case proving that parsing CSV files could be CPU bound. By CPU bound, I mean that the overhead of taking each line, finding out…


From Wild WebMink

Link roundup to December 16

Link roundup to December 16