, 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…
, 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…
, 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:…
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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…
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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.…
, 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…
, 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…
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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…
, 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…
, 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…
, 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,…
, 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…
, 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…
, 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…
, 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…
, 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…
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In the year 1989 people from Soviet occupied eastern Germany could flee to West-Germany via Hungary, see German reunification in Wikipedia. Hungary had opened the border to Austria. The German embassy in Hungary initiated a public advertising campaign thanking Hungaria, see Deutsche Botschaft…
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I can share 6 OnePlus invites for the next 5 days, i.e., up to Sunday, 23-Nov-2014. Device in question: One - 64 GB Sandstone Black. If anyone is interested please comment below with your e-mail address and I will hand out the invite. I will not publish or use your e-mail address for anything…
, 2 min read
Yesterday I went to the movie with my family and watched Laura Poitras's film Citizenfour. The movie in Frankfurt was completely sold out, many prospects had to be sent home, because there were no more seats available. I just got a ticket because I had a high number on the waiting list. I am…
, 1 min read
What effect can the optimizer have for gcc? On Intel/AMD I ran my intpoly program (with -n0) once with and once without optimizer. It showed a speed-up of about 3. no optimizer: 7.84s -O3: 2.25s gcc for Intel/AMD is version 4.8.2. On Power8 I again ran intpoly (with -n0). The factor is more…