When setting up authenticated SMTP service, be sure your IMAP server is accessible. The reason for this is Postfix will check the username using SASLauth daemon. And SASLauth damon uses “rimap” method for checking the username. Rimap is “remote IMAP”, and it tries to log into the configured IMAP service, which by default is defined as ‘localhost’.
Read the rest of this entry »Archive for category My job
SSL, Postfix and IMAP
Mar 9
We have a computer room in our local university, ind it’s quite bussy. The main problem it became (this is another story) too long to be usable and there was a strong demand for the screencast view right on the student’s workplace. Yes we do use beamers, but the view was too small to dead the text on the screen.
And so the project was born. There is single seat where the view originates and multiple locations where it should be visible. The system must be easily expandable and upgradeable, no vendor lock-ins. All the points in the systems should be easily adjustable and replaceable.
Read the rest of this entry »Just a tiny hole in the mesh may create a great mess.
The initial wind speed is 10 m/s, laminar aiflow. And the result is small F15+ class tornado int he Fujita scale.
Messing with PHP-ODT
Apr 7
I’m working oh hobby project on a free time, and one of the tasks here is to generate ODT file, containing output from the database. The output library i’ve chosen is PHP-ODT. It’s kind of basic, but allows to create ODT documents on the fly.
And now, lessons learned
Allways provide file size.
| This code will create corrupt file, according to LibreOffice: | The correct code is: |
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It is possible to add hierarchical styles
Not in the base code yet
$pStyleDate = new ParagraphStyle(‘revDate’);
…
$pStyleDateStrike = new ParagraphStyle(‘revDate-strike’);
$pStyleDateStrike->setAsChild(‘revDate’);
It is possible to add text decorations in the paragraph level
Again, not in the base code yet:
$pStyleDateStrike->setLineThrough(StyleConstants::SINGLE);
It is possible to merge cells in the table
Well, not in the base code and horizontally only:
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The Power of Pipes
Dec 5
Okay guys, the log if filling with
sshd[20117]: Invalid user pi from 142.93.118.186 port 50416 sshd[20117]: input_userauth_request: invalid user pi [preauth] sshd[20117]: Received disconnect from 142.93.118.186 port 50416:11: Bye Bye [preauth] sshd[20117]: Disconnected from 142.93.118.186 port 50416 [preauth] sshd[20119]: Invalid user cubie from 5.189.227.161 port 39772 sshd[20119]: input_userauth_request: invalid user cubie [preauth] sshd[20119]: Received disconnect from 5.189.227.161 port 39772:11: Bye Bye [preauth] sshd[20119]: Disconnected from 5.189.227.161 port 39772 [preauth] sshd[20121]: Invalid user guest from 208.68.37.169 port 42858
Short how-to use the save virtual users both for receiving emails via IMAPS, and sending via SMTP, or just rants for myself:
Source for the ideas and setup
/etc/postfix/main.cf must contain:
smtpd_sasl_local_domain =
smtpd_sasl_auth_enable = yes
In the case you heed to to upgrade the Woodpecker CNC control board, you will have to overcome some issues.
First one, the firmware upgrade via USB is almost(?) impossible, due to the CH340 chip between USB socket and Atmeg328.
Second one, the ISP header IS present on the PCB, but is has 1,27mm (0,05″ or 50 mils) pitch. Usual ISP connectors comes to 2,54 mm (0,1″ or 100 mils) pitch. Read the rest of this entry »
My settings for 3018 DIY CNC machine with Woodpecker’s control board and GRBL 0.9j.20150930. Note the feed rate and acceleration on axes.
Rant on Apache2
Jul 23
Recently I was trying to move my sites to SSL – for various reasons.
The test site went fluently, while the work machine refused to serve SSL content. While testing with ‘wget’, the error I received was
GnuTLS: An unexpected TLS packet was received.Meet the fMRI Parrot
Nov 6
What the heck is “fMRI Parrot”?
First of all, the heck is fMRI. fMRI stands for “Functional Magnetic Resonace Imaging”, as defined in Wikipedia. It involves tons of expensive hardware, like Magnetic Resonance machine, and software, used to reconstruct the scanned volumes. During fMRI scanning a series of stimulus are applied to the patient and the brain is scanned using fast scanning MRI techniques. The aim of fMRI is to record immediate changes happening in particular areas of the brain.
The single MRI scan is called “volume”. It is created from a series of slices of the predefined thickness. Having more slices creates more detailed volume and extends acquisition time. As the changes of the brain activity are momentary, a short volume acquisition interval, named TR or “Time Repetition” is needed. Usually it varies from 7 to 1.5 seconds, depending on the capabilities of the MR machine. Short TR time supposes lower quality scans, compared to the “traditional” MR scanning. So the level of detail of particular volume is a trade off between time and specific requirements.
The fMRI scans consists from a number of volumes, recorded at particular intervals. The key condition for a successful scan is the precise timing. In order to find a region with elevated activity, a stimulus must be started just when the volume acquisition begins. For this the MRI machine may expose a short pulse – start of a volume. The pulse may be brought to the MRI control room via the interface box and the required stimulus started automatically. Some stimulus require the patient to respond, eg. press the predefined button. The response from the patient is also brought to the MRI control room. As there are special requirements for any hardware at the MRI machine, only certified equipment is allowed to the MR room. The requirement at the MRI control room are more relaxed as well as the choice of the equipment There are different vendors of the interface boxes and response buttons, NordicNeuroLab (NNL) being one of them.
In order to create the simulation series, or paradigmas in fMRI terminology, a lot of time is needed. Each paradigma is to be verified before the clinical test, while some of them can not be tested without a signal form the MRI scanner or a response from the patient. There is no need to say the MRI equipment is expensive, so is the time spent in the MRI machine. Most of the MRI scanner interface boxed can be used in so called “simulation” mode, sending particular responses at the predefined moments, without actually running the scanner. For example the Sync Box from NordicNeuroLab will send “S” symbol at the start of the volume acquisition, while fORP from Cambridge Reserch Systems is to send “5”. So what is actually required to test a paradigma, is the response from the scan… WAIT!
It’s must not be the MRI scanner nor the interface box.