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Saturday, July 12, 2014

Chitwanix OS 1.5 codename Khukuri has been released.

Chitwanix OS is a Linux distribution developed by a community of Linux developers in Nepal.

Chitwanix OS is an Ubuntu-based distribution that has been crafted to fit the needs of computer users in Nepal.

It comes with the Sagarmatha desktop environment (a fork of Linux Mint's Cinnamon) and it also offers various user-friendly enhancements.

The developers of Chitwanix OS are cooperating with user communities in Nepal in order to translate the operating system and applications into Nepali, as well as Tharu, Newari, Gurung and Magar languages.

New Features and Improvements:-

- Sagarmatha version 1.0.2

- HTML5 Login screen with user list and On-screen keyboard on the login screen..

- Updated Software Packages.

- Will receive software updates and will have binary as well as source code repository access.

- Improvements in drivers and supports like WiFi drivers, Ethernet drivers, Graphics, HDMI, etc.

- Improvements in Nemo and its extensions.

- Artworks Improvements.


Tuesday, July 8, 2014

Model Builder is a graphical tool for designing, simulating and analysing Mathematical models).

Model Builder is a graphical tool for designing, simulating and analysing Mathematical models consisting of a system of ordinary differential equations(ODEs).


  • Equation-based model definition. No need to learn to program to define and run your models. Just type-in you differential equations
  • Graphic output of simulation. You can save the graphics in the most common formats: png, svg, pdf, etc.
  • Spreadsheet view of the results. From the spreadsheet you can make customized plots from your variables. You can also export your data to a .csv text file
  • Latex rendering of your system of equations.
  • Intuitive graphical interface.
  • Free software. Licensed under the GPL
  • Portable. Run wherever Python runs.
  • Uncertainty analysis module (coming soon!)

Getting started.

The best way to get started with ModelBuilder is open one of the models  included  with the distribution and look at it . Yes, it’s that simple.

model builder5

NETGEN is an automatic 3d tetrahedral mesh generator.

Accessible and cross-platform C++-based application that enables you to quickly develop and generate 3D meshes in no time at all

NETGEN is a powerful and automatic 3D tetrahedral mesh generator. The application is designed to accept input from constructive solid geometry (CSG) or boundary representation (BRep) from STL file format.

This program will generate triangular or quadrilateral meshes in 2D, and tetrahedral meshes in 3D.

The input for 2D is described by spline curves, and the input for 3D problems can be defined by Constructive Solid Geometry (CSG), the standard STL file format, or via Boundary Representations (BRep/IGES/STEP) when compiled with OpenCascade support.

NETGEN also provides modules for automated mesh optimization and hierarchical mesh refinement. Curved elements or arbitrary order are supported.


    Two and three dimensional surface meshing
    Three dimensional volume meshing
    Delaunay and advancing front mesh generation algorithms
    Constructive solid geometry, or boundary representation
    Mesh refinement algorithms
    High order curved elements


MrBayes is a program for Bayesian inference and model choice across a wide range of phylogenetic and evolutionary models.

MrBayes is a program for Bayesian inference and model choice across a wide range of phylogenetic and evolutionary models. MrBayes uses Markov chain Monte Carlo (MCMC) methods to estimate the posterior distribution of model parameters.

Program features include:

    A common command-line interface across Macintosh, Windows, and UNIX operating systems;
    Extensive help available from the command line;
    Analysis of nucleotide, amino acid, restriction site, and morphological data;
    Mixing of data types, such as molecular and morphological characters, in a single analysis;
    Easy linking and unlinking of parameters across data partitions;
    An abundance of evolutionary models, including 4 X 4, doublet, and codon models for nucleotide data and many of the standard rate matrices for amino acid data;
    Estimation of positively selected sites in a fully hierarchical Bayesian framework;
    Full integration of the BEST algorithms for the multi-species coalescent.
    Support for complex combinations of positive, negative, and backbone constraints on topologies;
    Model jumping across the GTR model space and across fixed rate matrices for amino acid data;
    Monitoring of convergence during the analysis, and access to a wide range of convergence diagnostics tools after the analysis has finished;
    Rich summaries of posterior samples of branch and node parameters printed to majority rule consensus trees in FigTree format;
    Implementation of the stepping-stone method for accurate estimation of model likelihoods for Bayesian model choice using Bayes factors;
    The ability to spread jobs over a cluster of computers using MPI (for Macintosh (OS X) and UNIX environments only);
    Support for the BEAGLE library, resulting in dramatic speedups for codon and amino acid models on compatible hardware (NVIDIA graphics cards);
    Checkpointing across all models, allowing the user to seemlessly extend a previous analysis or recover from a system crash;


Maria is a reachability analyzer for concurrent systems that uses Algebraic System Nets.

Maria is a reachability analyzer for concurrent systems that uses Algebraic System Nets (a high-level variant of Petri nets) as its modelling formalism. It has been written in C++, and its is freely available under the terms of the GNU General Public License.

Maria relies on external programs translating LTL formulae into generalised Büchi automata or finite-word automata. It communicates with these programs by writing a formula to the standard input of the translator and by reading the translated automaton from the standard output of the translator. Each formula is translated in a separate run of the external program. The program is invoked without arguments.

Maria maps the state numbers in the property automata to a contiguous sequence. If you want to see the automata after this mapping, define the preprocessor symbol DEBUG_AUTOMATON when compiling the file Property.C. In that way, Maria will dump the mapped automaton to the standard output. The automaton can be visualised with the lbt2dot tool of LBT.

To grab the formula sent by Maria to the external translator, write a wrapper shell script for the translator that does something like tee formula.txt | exec the-real-translator.

maria modular analyzer

Monday, July 7, 2014

Lybniz is a simple function graph plotter in Python.

Lybniz project is a simple function graph plotter in Python on GTK.

Lybniz allows to plot up to three functions on one graph. It needs no installation - simply one Python script.

· PyGtk

What's New in This Release:
· 1.3.1 contained a silly mistake, made when I upped the version number just prior to releasing. This fixes it. There are no other changes.

Using Lybniz
Enter functions in Python syntax with x as the dependent variable. Press the Plot button to see the graph.
Constants and functions of the math module are available.

x**3 - 2 * x
2 * cos(x)
e ** (x / -5) * sin(x)

xMin, xMax, yMin, yMax define the boundaries of the range on the abszissa and ordinate to be displayed.
To zoom in, activate the Zoom In tool button. It divides the range boundaries by half. Zoom out does the opposite. To closer inspect a specific section, drag the mouse cursor over an area. After release of the button the area thus marked will be displayed.

The scale automatically adjusts as you zoom in and out. To switch between decimal and radian styles, use Graph -> Scale Style -> Decimal or Graph -> Scale Style –> Radians

If you wish to use a custom scale select Graph -> Scale Style -> Custom. You can then use the xScale, yScale entries to input the intervals at which marks are displayed on the respective axis.


Saturday, July 5, 2014

Top 10 blog posts for June 2014 from Linuxlandit & The Conqueror Penguin.

1.- 10 small Linux applications I can't live without.

10 small Linux applications I can't live without.

Day in and day out, there are small (or smallish) applications I have come to completely rely upon. Without these tools, my job and/or my sanity would become precarious. These tools range from entertainment to administration (and all points in between). So I thought I would share my short list with my loyal readers. Check out these apps, then pick and choose those that belong on your must-have

Read More ... »

10 small Linux applications I can't live without.

Day in and day out, there are small (or smallish) applications I have come to completely rely upon. Without these tools, my job and/or my sanity would become precarious. These tools range from entertainment to administration (and all points in between). So I thought I would share my short list with my loyal readers. Check out these apps, then pick and choose those that belong on your must-have list.

1: Pithos.

If you're a music fan like me, you probably do a lot of streaming from the likes of Pandora. The problem on Linux is that most of the Pandora clients are horrible. That is, all but one. Pithos is one of the best music clients I've used. It's small, simple, and reliable, and it allows me to quickly choose between my Pandora stations and easily create new ones. I use Pithos every day I am at my computer and would hate to go without it.

2: Kate.

There are times when a full-blown word processor is too much for the job, such as when you're coding in the language of your choice. Tools like LibreOffice let you write HTML, but I find the resulting code to be horrible. And although Gedit is a nice similar graphical tool, Kate has more features and works with indenting better. Of course, for straight-up editing of configuration files, you can't beat the ease of use of Nano.


Calc C-style arbitrary precision calculator.

Calc is an interactive calculator which provides for easy large numeric calculations, but which also can be easily programmed for difficult or long calculations.

It can accept a command line argument, in which case it executes that single command and exits. Otherwise, it enters interactive mode. I

n this mode, it accepts commands one at a time, processes them, and displays the answers. In the simplest case, commands are simply expressions which are evaluated. For example, the following line can be input:

3 * (4 + 1)

and the calculator will print:


Calc as the usual collection of arithmetic operators +, -, /, * as well as ^ (exponentiation), % (modulus) and // (integer divide). For example:

3 * 19^43 - 1

will produce:

29075426613099201338473141505176993450849249622191102976Notice that calc values can be very large. For




Friday, July 4, 2014

Multi-Booting the Nexus 7 Tablet: Getting Ubuntu Touch Running.

If you've not seen a Nexus 7, it's a nice little device. Like all "Nexus"-branded Android devices, it's a "reference" device for Google's base Android implementation, so it's got a well-supported set of hardware. I'm not trying to make this article sound like a full-fledged review of the device, but here's a few tech specs in case you're not familiar with it:

Ubuntu Touch is something I've been watching closely, particularly because I spent a little time with an Ubuntu Touch-equipped Nexus 7 at the Southern California Linux Expo. The Ubuntu Touch developer builds can be a little finicky, although they've stabilized in recent weeks. The key to getting them going in MultiROM is to select the "Don't Share" radio button when adding the ROM.

The Ubuntu Touch builds come in two parts. Add the smaller hardware-specific zip file first (on my Wi-Fi Nexus 7, it's, but do not reboot—go back, list the ROM again, then push Flash Zip, and select the larger ROM file (

After that completes, you can reboot your tablet into Ubuntu Touch. Be advised, though, that Ubuntu Touch is under very heavy development, and sometimes the daily builds exhibit issues—and may not work at all. Your mileage may vary. If you do get Ubuntu Touch going, but it seems unresponsive to touch, try sliding from the left bezel toward the center.

That'll bring up a Unity-style launcher, and things should work from there. It took me a few tries to figure this out. I thought my Ubuntu Touch installation was broken or that I had a bad build. It turns out, it's just a different operating paradigm.

Ubuntu Touch on the Nexus 7

Figure 4. Ubuntu Touch on the Nexus 7!

Multi-Booting the Nexus 7 Tablet: adding ROMs to MultiROM.

Anyone who knows me well enough knows I love mobile devices.

Phones, tablets and other shiny glowing gadgets are almost an addiction for me.

I've talked about my addiction in other articles and columns, and Kyle Rankin even made fun of me once in a Point/Counterpoint column because my household has a bunch of iOS devices in it. Well.

I was fortunate enough to add an Android device to the mix recently—a Nexus 7 tablet. I actually won this device at the Southern California Linux Expo as part of the Rackspace Break/Fix Contest, but that's a different story.

Adding ROMs to MultiROM is fairly straightforward from here.

Just hook your tablet up to your computer, drop the .zip file for the ROM you want to install onto the root of the filesystem, and then shut down the tablet.

Restart your Nexus 7 in MultiROM by holding the "Volume Down" button while pushing the power switch. You'll see a screen with what appears to be the Android logo lying on its back (Figure 1).

This is the bootloader. Push the "Volume Down" button until the red arrow at the top of the screen indicates "Recovery Mode", then push the Power button. This will boot the Nexus 7 into MultiROM.

Android Bootloader Screen

Teaching Math with Kig, the KDE Interactive Geometry Program.

Kig is an application for interactive geometric construction, allowing students to draw and explore mathematical figures and concepts using the computer.

It is intended to serve two purposes:

    Allow students to interactively explore mathematical figures and concepts using the computer
    Serve as a WYSIWYG tool for drawing mathematical figures and including them in other documents
Kig supports macros and is scriptable using Python. It can import and export files in various formats, including SVG, Cabri, Dr. Geo, KGeo, KSeg, and XFig.

Kig is part of the KDE 4 education module.

It is meant as a better replacement for such free programs as KGeo, KSeg and Dr. Geo and commercial programs like Cabri.

ig's user interface can be a bit deceptive at times. When you first start the program, you are presented with a grid and a group of tools used to create various diagram elements. At this point, you begin to think that the interface is intuitive and that you already “know” how to use it. Then, for a brief moment, you run into trouble. For example, if you try to use a tool to construct a circle given a center point and a line segment as a radius, the program is expecting that the line segment already has been created; you can't create the line segment as part of constructing the circle. After you've used the program for a few minutes, you begin to understand how it “thinks” and things go pretty smoothly.


Thursday, July 3, 2014

Mednafen is a multi-system emulator, driven from the command-line.

Mednafen is a multi-system emulator, driven from the command-line.

Many of its cores are ports of other emulators, but many of them are also original.

Its Playstation and PC Engine original cores are notable for their high quality, compatibility and accuracy.

Mednafen only has a command line interface, so its interface might be hard to use to new users.

The best cores in Mednafen are those that are original - which are the PS1, PCE, PC-FX and Virtual Boy cores.

The PCE core is one of the best emulators for that system, with a Fast and Accurate version.

The PS1 core is native resolution only, and features high degree of accuracy and compatibility.

The Virtual Boy core is one of the best for the system, although it does not attempt to reproduce the 3D.

Other cores improve upon emulators that have been long abandoned and rarely updated. These include the Neo Geo Pocket, WonderSwan Color and Atari Lynx cores.

Other cores are less useful, as there are better options in stand-alone emulators (NES, Genesis, Master System and SNES). These cores might even be based on out-dated versions.


Ubuntu 14.04 “Trusty Tahr”: Tips and Troubleshooting.

1.- Run Command.

You can run any application in your path using the Run Command. Use Alt+F2.

2.- Turn off Hot Keys.

This is the most evil option on any operating system, in my opinion. A mis-stroke enables any number of random events. Unfortunately, this problem is pervasive in operating systems and is difficult to turn off.

Menu -> System -> Administration-> Advanced -> Input Actions -> General Settings -> check "Disable KHotKeys daemon"
Menu -> System -> Administration-> Advanced -> Input Actions -> Gestures Settings -> check "Disable mouse gestures globally"

If you wish to be selective about it (this doesn't often work, however), start by disabling unnecessary desktop hotkeys.

Menu -> System -> Administration-> Advanced -> Keyboard & Mouse –> Keyboard
3.- Shortcuts.

Ubuntu-Med is the Ubuntu customization for medical environments.

Ubuntu-Med is a project to incorporate several servers useful to medical practitioners into a single customized (K)Ubuntu-based operating system.

The Filesystem Archive or LiveCD can be installed or used as a demo (after some additional personalized customization).

To go directly to the Sourceforge page click here.


Any device (including software) used for diagnosis or treatment requires FDA approval in the US (or CE approval in Europe) as a medical device.

Therefore, nothing in Ubuntu-Med can be used for any purpose other than for administrative and evaluation purposes in those areas.

No warranty of any sort or representation of suitability for purpose is expressed or implied with the distribution of this software.

What is included in Ubuntu-Med ?


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