Tag: programming

OpenBabel.Erdély mint app

2015.10.20.
belső hírek
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Elkészítettem az OpenBabel.Erdély mindenes-szótár alkalmazást Android kütyükhöz, és ezzel most számomra teljessé vált a paletta – van asztali gépre szánt offline, böngészőbe szánt online és telefonra szánt natív változat. A nem Androidot használóknak pedig marad a mobilra optimizált web-kiadás.

Az alkalmazás az obe weboldalt kérdezi meg, ezért internet-kapcsolatot igényel. A Play Store-ban egyelőre még nem elérhető, de a kütyükhöz jobban értő felhasználók innen letöltve, saját felelősségre, kipróbálhatják.

Aligning an EQ mount – the smart way

2015.08.10.
belső hírekenglish
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The look of the polar scope

The look of the polar scope

So the polar scope in my mount is a rather basic one. It does have some constellations but they are more like drawings. The only point having been marked is a small circle where Polaris should go. And this is not enough for astrophotography – especially if the scope is not guided.

Of course one needs a few things for a good alignment, which basically boil down to knowing the geographical position of the scope and the (sidereal) time. These are things for a chart or a computer to know, not for a human, so I decided I wanted an elegant solution.

Therefore I came up with this (csillagtura.ro/polaris) script for smartphones. The script takes the user’s geo-position plus the date and time and shows the expected view plus some tech info. After adjusting the mount to show the expected view the only thing remaining is to get Polaris into the circle. I saved a shortcut on my phone’s desktop so when I tap on it, it shows me how to set up my scope.

The script has a few tweaks like the position of Polaris is J2015 instead of J2000, but I found it’s accuracy could be improved. However, it should be good enough for the next few years, and it’s made my hobby a bit easier. Needless to say, the script works for any polar scope (I have this rather basic one pictured above) in any mount (I have an EQ3) until the circle around the pole is the same and the image is inverted the same way.

If you don’t like using my site or are paranoid about it then feel free to copy the source and host it yourself – see the stuff in the grey rectangle.

project_polaris

 

My(?) Social Network

2015.02.03.
Besorolatlanenglish
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Me, looking at how me and my friends are connected. Only 284 people

Me, looking at how me and my friends are connected. Only 284 people, but 4052 lines

We tend to call the collective of our friends a network. A social network. We tend to go networking – meeting people. What does my social network mean? I investigated a bit.

For some years it seemed debatable whether social networking sites were private or public space. One might have argued „I am among friends and only friends (those I accepted and they have accepted me) so it is a private matter whatever I do.” Now there is at least one case in Romania when the court ruled that one’s social networking profile is public space and all laws are applicable as such.

This issue made me wonder how private or public is my (or anybody’s) profile depending on the privacy settings applied. So I checked it out and tried to find some other interesting stuff too.

Results in short
I have 283 friends (in a technical sense). My friends have friends anywhere from a few dozen to close to the facebook limit (5000). The count of my friends’ friends is 131,338 individual profiles – so much for the privacy provided by the setting called „friends of friends”. If all my friends who are friends of eachother’s shook hands, that meant 4,052 handshakes. The number of people who are potential audience may easily dwarf that of a regional newspaper and is comparable to the reach of nationwide media products in spite of the seemingly limiting privacy settings of a particular post. (tovább…)

Eine kleine Sternmusik

2014.04.14.
a művészet felőlromâneștezene
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Kepler: arată a planetă

Kepler: arată a planetă, nu-i așa?

Majoritatea am auzit deja despre telescopul spațial, vânător de planete Kepler. Pe scurt, a fost lansat în 2009 și până la vara anului 2013 și-a făcut datoria, măsurând luminozitatea a 160 mii de stele, cu foarte mare precizie și căutând mini eclipse stelare – semne ale planetelor. Din aceste date s-a conclus că doar în Calea Lactee există în jur de 17 miliarde de planete care seamănă mai mult sau mai puțin cu Terra. Care date? Păi care sunt accesibile tuturor prin pagina planethunters.org unde și noi putem căuta planete.

(tovább…)

The Correlation of Weather and Web Site Traffic

2014.03.15.
Besorolatlanenglish
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"The Matrix ows you!"

„The Matrix owns you!”

I decided to write an article outside amateur astronomy, which is the main scope of this blog. Why? Cause I have the means and I find it fun :)

In this short paper I describe the correlation between the visitor traffic the website radiocluj.ro received and the weather conditions recorded in the geographically relevant area. My goal was to measure how much weather conditions impact visitor behaviour. I found that the general hunch (good weather-less visitors, bad weather-more visitors) is not only true, but weather has a ~20% impact on traffic, depending on the definitions used. With further refinement the findings described below might be used in a predictive manner to maximize the impact of an article, however this is outside of the scope of this paper. (tovább…)

animgif, ffmpeg, ImageMagick. Tutorial and Frontend

2014.02.23.
Besorolatlanenglish
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Graphical Interface (frontend) version:
animgif frontend zip date 2022-12-04T19:21:42+02:00

 

Szaturnusz, Cassini-rés. MC 102/1300, 268 frame-ből válogatott a Registax

Saturn and the Cassini division.  MC 102/1300, webcam, stack of 268 frames, Registax

I am nostalgic about those times when there was no, or at least much less black hat content on the internet. Search engines were as they were, but the results were valid. Free software was free, developed by developers, and the notion of bundleware, crapware, bloatware were like unknown. Today? Trojans, spyware and spamdexing wherever you look. This pisses me off, and this is the reason I wrote this article and developed the free software.
(tovább…)

Jól kalibrált monitoron mindegyik számnál elkülönülő árnyalat látszik. Ha mégsem látszanak, akkor a megjelenített képek színhiányosan rajzolódnak ki. A monitort valószínűleg kalibrálni kell.

You should see distinct shades for each number. If those shades are not clearly visible, the displayed pictures will lack accuracy. Your display most likely needs to be calibrated (brightness, gamma, contrast etc.).