Two Free Invites for the OnePlus One, #4
, 1 min read
Two more invites: GL05-1RXC-BCFK-C3VN GLCF-1RUJ-ODEW-1YZW These are now expired.
Two Free Invites for the OnePlus One, #3
, 1 min read
I have again two free invites to purchase a OnePlus One smartphone. Below are the codes: GLFB-GQM2-ZDHX-2XJM GLQW-0J5G-URN3-ZPIC The last two invites were just claimed, and were not actually used. This is really a waste of these invites, as there are a lot of people who really would like to…
Malcolm Gladwell on the financial crisis
, 2 min read
Yet another excellent speech from Malcolm Gladwell given at High Point University, see highpoint.edu. This time on Financial crisis of 2007–08 Battle of Chancellorsville between General Lee and Joe Hooker during the American Civil War in 1863 Overconfidence and miscalibration, results from…
Malcolm Gladwell on the importance of stubbornness
, 1 min read
A very interesting speech of Malcolm Gladwell on stubbornness in below YouTube video. Dead link. Video is here: Conference: Genius in 2012 He makes references to Linear B, i.e., historic greek symbols Michael Ventris, deciphering Linear B Andrew Wiles and his proof for Fermat's Last Theorem, no…
Importing Calendar Data to Google-Calendar
, 3 min read
Importing calendar data to Google is still troublesome for a number of reasons. What seems to work goes like this: Force-stop calendar app in your Android phone Clear all calendar data in your Android phone Shut down your Android phone Log-off from all other Google accounts Shut down your browser…
Two Free Invites for the OnePlus One, #2
, 1 min read
I have two free invites for the OnePlus One. Below are the links: GLYP-ATVO-YQ8K-D969 GLGQ-A0LM-I7RL-EKGB Please do not click on the links if you do not want to actually buy the phone, because the invites are then reserved and cannot be used by others. For a review of the phone see Review of the…
On Differential Forms
, 7 min read
Abstract. This article will give a very simple definition of $k$-forms or differential forms. It just requires basic knowledge about matrices and determinants. Furthermore a very simple proof will be given for the proposition that the double outer differentiation of $k$-forms vanishes. MSC 2010:…
Testing file-size limits
, 1 min read
For testing purposes you may want to provoke a file-size error. Here are the steps. Open a new bash/xterm. Set a file-size limit with ulimit, then write a file with dd. ulimit -f 1 dd bs=1 iflag=count_bytes count=5000 if=/dev/zero of=yourFile The resulting error is File size limit exceeded (core…
Average daily commuting time in Europe and the U.S.
, 1 min read
Below chart is taken from Stress That Doesn't Pay: The Commuting Paradox, August 2004, page 30. The data is per 2000/2001. The above document links these numbers with reported satisfaction with life -- longer commuting times means less happiness. Numbers change over time. Five year later the U.S.…
Using GnuPG for encryption and decryption
, 1 min read
On Ubuntu install with: apt-get install gnupg First generate private and public key: gpg --gen-key Generating this key can take some time, because it needs enough randomness. Store your public key in a file: gpg -a --export Although it is not necessary to store this public key, you usually will…
WordPress.com News and Numbers: Year 2014 in Review
, 1 min read
Im(Press)ive! Your Year in Review published some usage statistics for the year 2014, which are quite astonishing: 18,300,771 new blogs 555,782,547 new posts 24.5 TB/h (Terabyte per hour) Compare this with statistics from year 2013: 13,704,819 new blogs 489,281,136 new posts 667,675,929…
Downloading Binary Data, for example Boost C++ Library
, 1 min read
Downloading the Boost C++ library is occasionally hindered by various company policies. boost_1_57_0.7z.rc4.b64 is Boost version 1.57.0 (MD5 is 17c98dd78d6180f553fbefe5a0f57d12) in the following format: compressed with 7z, size 55 MB encrypted with RC4, password "boost", size doesn't…
Announcement: 11th International Conference on Parallel Programming and Applied Mathematics
, 1 min read
The conference will start in September 6-9, 2015, Krakow, Poland. Parallel Programming and Applied Mathematics, PPAM for short, is a biennial conference started in 1994, with the proceedings published by Springer in the Lecture Notes in Computer Sciences series, see PPAM (dead link). It is…
Two Free Invites for the OnePlus One
, 1 min read
Below are two invites for the OnePlus One smartphone. These two invites expire in less than 12 hours. Don't click on the invites if you don't want to actually purchase the…
Setting up SLURM on Multiple Machines
, 4 min read
SLURM is a job-scheduler for Linux. It is most useful if you have a cluster of computers. But if you only have two or three computers it can be put to good use. SLURM is an acronym for Simple Linux Utility for Resource Management. SLURM is used by Sunway TaihuLight with 10,649,600 computing cores,…
Migrating from delicious.com to WordPress
, 4 min read
I have been a loyal user of del.icio.us since 2006. I have written on this in my post Saving URLs in del.icio.us Still Troublesome. But now enough is enough. Here is a list of annoyances: You can neither export nor import your data anymore. The service is generally slow, i.e., it takes a lot of…
Three Free Invites For the OnePlus One
, 1 min read
I have written a review on the OnePlus One smartphone. I have three more invites for the OnePlus One smartphone. Below are the codes. Use them according "first come, first served". Invite 1 with code GLK0-ZEFI-BW0A-MYZG has been claimed and used. Invite 2 with code GLV4-U7PE-V1AL-YJZN was…
2014 in review - report generated by WordPress
, 1 min read
The WordPress.com stats helper monkeys prepared a 2014 annual report for this blog. Here is an excerpt: The concert hall at the Sydney Opera House holds 2,700 people. This blog was viewed about 13,000 times in 2014. If it were a concert at Sydney Opera House, it would take about 5 sold-out…
Hard-Disk and USB Drive Speed Comparisons
, 1 min read
Continuing the post Harddisk Drive Speed in MB/s, here are some benchmarks for consumer grade hard disks, USB thumb drives, and solid state drives (SSD). A 64 GB SanDisk USB 3.0 thumb drive: This USB drive has only half of the speed of the USB drive given below. A 32 GB JetFlash Transcend USB 3.0…
Statistics of this Blog: Crossed 15.000 Views
, 1 min read
This blog was viewed more than 15.000 times. As in this post, here are the numbers: The averages per day are: Comparing last year and this year: Visits went up by a factor of seven. The development of visits is as below: Google is the top most important referrer by far: Most visited posts in…