Mendeley Desktop: Linux Version

In the first day of this semester, a lecturer showed us a useful app: Mendeley. The name reminded me to something. I just remembered about library collection numbering system. But no, it’s Dewey system actually (I googled it just now). Or perhaps it’s more similar to a name of something about chemical. Umm… Mendeleev’s periodic table! Forget it! There’s nothing to do with chemical actually. It’s just an unrequited love of me. šŸ˜€

Mendeley is aĀ reference manager and an academic social network. My lecturer showed us how he uses it to monitor the progress of his related researches over the world. It’s about economics. He also uses it as a citation manager for his papers. He showed us how easy to generate the citation from certain paper for bibliography, with just copy it from its menu and then we just need to paste it to word processing app, like MS Word.

Mendeley can be downloaded from its official page in this link. It supports all major operating systems, including Linux. For Linux itself, there are two options: for Ubuntu family and for “generic Linux”, that means a pre-compiled binary for all Linux distro variants. As I use Fedora, I chose the latter. I just had to extract the tarball, and then executed the file ./bin/mendeleydesktopĀ either from terminal or double click the file. We need to register a free account on the Mendeley website to use this app, anyway.

mendeley linux desktop

Hey, it’s Qt-based!

I was interested to give it a try, as I saw another option to generate the citation format other than Formatted citation. They’re LaTeX custom command and BibTex entry formats. Actually I haven’t needed it yet, after all.

mendeley on fedora

Mendeley search results and copy citation format

I tried the Bibtex entry format option, as you can see from above screenshot. Then I created the .bib file manually from copied text. And then I appended the citation to the LaTeX file. Just like below screenshot.

mendeley citation bibtex

Bibtex citation format of Mendeley (note that it’s just an example text)

It’s so convenient to organized the citation using Mendeley. I start imagining to be a researcher and write some useful papers by utilizing it. šŸ˜€



Was succeeded installing Spotify, but…

Lately, when I was booting up to Windows, Spotify just got installed and a quite serious damage got occurred. I installed it as Groove Music suggested me to do so when I opened it and found some new changes, since Microsoft would stop their music streaming service by the end of this year. While I was streaming to a podcast, suddenly the Windows hanged. I was not so sure that Spotify was the cause, instead, I suspected some kind of bad sectors might have been infected my HDD. So, I had to hard shut it down by pressing power button, then. And when booting again, the Windows took more time than usual to load up. It made me more sure to believe at the bad sector.

Then I tried streaming again, and the Windows got frozen as well.

2017-12-03 (10)

A few moments before the disaster

To make me more sure that Spotify caused the system to freeze, I installed it on Fedora. And yes, it caused Fedora to freeze, too!


Just the same in Fedora

I’m not alone in this situation. Some people find solution for this issue, but I’m not sure if it works for me too.

I don’t know what’s actually happening. But, it just quite disappointing, even though, actually I wanted to try their premium subscription, even just for the first 3 months. šŸ˜€


Spotify premium

Get forced to wake up

Do you have a problem with your wake up time? Do you often get up too late? You deserve trying this app. Its name is Fajar Warrior Alarm, “just” an alarm app. Actually there are a lot of similar app in the PlayStore. But I choose this one for you, because it’s free (of course the others are free as well though), free of charge and free of ads, that’s the point. I hate apps that show ads so often. And luckily, there is still a generous developer who doesn’t take the user’s freedom to not showing ads in his app. I mean this alarm app.

So, what else that makes it awesome? The challenge to stop the alarm voice. You couldn’t stop the alarm, unless you type the exact same sentence (a hadith) in the input it has. Actually I searched for “math alarm” when I found this app. But unfortunately it contained ads, so I looked for another app instead. And it led me to this Fajar Warrior Alarm.

The idea is similar to the app I wanted in the first place. It won’t stop the noisy alarm until the user type in some expected text. It causes the user to use his/her fully consciousness when typing the answer. And hopefully make the user totally wake up. So curious about it? Just install it and try it on your phone. Good luck.


QR Code Scanner with Qt Framework + OpenCV

I need a program for scanning QR code and processing the data. For this purpose, there are several libraries which can help saving my time for developing it. For instance, ZXing library, or ZBar. For web developers, there are also corresponding library for scanning QR code, that are both client side (JavaScript) and server side (PHP). Continue reading “QR Code Scanner with Qt Framework + OpenCV”


Kinetic typography is an animation technique for moving text in certain ways. It became quite popular since a few years earlier. There are so many tutorials out there how to do kinetic typography. Almost all of them are created with After Effects (AE).

As a part of OpenSource community, I have once wondered, was there exist a similar program to do kinetic typography that runs on Linux? The answer is, yes of course, but not as powerful as AE. Actually, I’ve found Synfig Studio that has a close functionality to AE to produce kinetic typography. But, basically Synfig is a 2D animation software. Therefore, I cannot compare it with AE, after all.

TL;DR, this is a tutorial I’ve found in Youtube to do kinetic typography in Linux

And this is my rendered video


Making Kinetic Typography in Linux

HTML5 App for Desktop Using Qt WebKit

Qt WebKit HTML5 App

Qt WebKit HTML5 App

It’s been a long time since the last time I wrote about Qt programming. This time I’d like to share my recent activity on developing the desktop version of my Android webapp, Hafal Quran. You can download it from Google Play Store by clicking this badge:
Android app on Google Play

My purpose is that the app can run on most platform. So it led me to choose HTML5 approach. And finally I come up with the app website which everyone can play it onĀ The Android app is the first platform-specific release of Hafal Quran.

While it looks like already reaches the final version, it actually lacks an important aspect, i.e dis-connectivity. We have to connect to internet to play it. Of course we cannot play it when go offline. So now, I continue itsĀ development to the next step: offline mode.

The first development should be focused onĀ the Android version, as the usersĀ of mobile devices are the most and growing. But for now, I will make the offlineĀ versionĀ for desktopĀ first. In this case, I choose to deploy it for Ubuntu Linux distro and the derivatives, particularly Grombyang OS Edu.

Technical overview

I utilize Qt framework for the development because I have some experiences in it. Besides, I decided to use Webkit as the engine of the app. And actually it is part of Qt framework itself. Webkit is the infamous engine for most popular browser, including Safari, Chrome, and even Opera.

But unfortunately, QWebKit module is now being deprecated since Qt 5. And it is now superceded by QWebEngine module. So, for now, I will still use QWebKit module of Qt4.

The drawbacks of using Webkit is probably about the memory usage. Since Qt modules are quite greedy in terms of consumingĀ RAM.

FYI, the Android app was oneĀ of 50 apps thatĀ were selectedĀ at Finding Top50 Local Apps event, which was held by Baidu Indonesia last year.


Read EPUB in J2ME phone

Albite Reader

An e-book reader for Java Mobile developed by Svetlin Ankov. It’s free, and it’s released under the Apache 2.0 License. The source code is available at GitHub. If you are interested in the licensing info of the used resources or would like to download their sources or build your own resources, see the paragraph about resources down the text.

Works with EPUB, txt and (x)html files.

melalui Get the Reader at Albite BOOKS.