Free physical software for linux

Physics-Live CD is a livecd mainly for physical simulations. The livecd is based on Slax livecd . It contains many physical simulations created by using c, gtk and glade. The physical simulations are taken from my research and from the internet.

I hope this livecd will be useful for learning and teaching physics and research in physics.

Diald manages network links over PPP. It can also be used to manage and/or monitor any network interface.
Diald sets up a "proxy" device which stands in for the physical connection to a remote site. It then monitors the proxy, waiting for packets to arrive. When interesting packets arrive it
will attempt to establish the physical link to the remote site using either SLIP or PPP, and if it succeeds it will forward traffic from the proxy to the physical link. As well, diald will monitor traffic once the physical link is up, and when it has determined that the link is idle, the remote connection is terminated. The criteria for bringing the link up and taking it down are configurable at run time, and are based upon the type of traffic passing over the connection.
Enhancements:
- Use openpty to get a pseudo terminal if it is available.
- Added Makefile rule to build RPMs.
- Changed to use GNU autoconf.
- Added config save/restore to dctrl. Patch from someone but I forget who. If it was you please tell me!
- Handle dynamic changes of netmask.
- Fix check for first packet between firewall.c and filter.c
- Only compile TCP_CORK code if TCP_CORK is defined.

PyDBDesigner is a free relational database modeling tool that is planned to be able to design both logical and physical models similarly to Erwin(c) and PowerDesigner.

Its goal is to provide a useful toolset that allows developers analysts and database designers to design and develop databases from the verbal model to the schemas and SQL scripts.

There is no such a tool is available as a freeware. There is a project called DbDesigner, but it seems to be discontinued and its functionality is not enough for modeling (and the concept behind it seems to be weak).

The concept is to implement ER logical and physical modeling paradigm as correctly as possible, meanwhile creating a tool that is useful as soon as it is possible. So the development concept is that features are added rapidly, but carefully (trying to leave space to the features that come later).

For example, the "type" class is good enough to implement data domains, however, the code that actually creates domains using GUI is not implemented. The "type" attribute of the properties uses this object, so adding domains to attribute types is easy.

Installation Instructions:

• pt-helper is written in Python, so you'll need a Python interpreter to get anything working. It also depends on several Python modules;
• If you do have all the dependencies, you should be able to run the program just by running the pt-helper script with a Python interpreter. From a shell, the following command should do the trick: $ python pt-helper.py
  
• Users of graphical file managers can probably double-click the pt-helper script to achieve the same effect.

Requirements:

• Python
• PyGame
• Festival Speech Synthesis System

YASP project is a lightweight network protocol for micro controllers.
YASP is a simple and open protocol for building networks with small microcontrollers. It is designed to have a small footprint for easy implementation with minimal hardware resources, but without sacrifice advanced features and future growth.
The protocol scalability is implemented using variable length fields.
The physical layer use the NRZ encoding as in RS-232, but using dominant and recessive bus states to provide a reliable way to detect collisions.
Main features:
- Node adresses: 1 to n bytes
- Medium access: CDMA/CS/NDA (Carrier Sense Multiple Access / Collision Detection / Non-Destructive Arbitration)
- Addressing modes: unicast, broadcast and multicast
- Smallest frame: 6 bytes
- Error detection: CRC16
- Bus signaling: 1-wire "open collector" or 2-wire diferential (CAN transceiver)
- Current PIC implementation: about 480 words of code and 25 bytes of RAM (interrupt driven)
Enhancements:
- Fixed minor framing bugs that affect reception of consecutive frames.
- Added sample code for analog inputs node using 16f876.

Sys::MemInfo is a Perl module for memory informations.

SYNOPSIS

use Sys::MemInfo qw(totalmem freemem totalswap);

print "total memory: ".(&totalmem / 1024)."n";
print "free memory: ".(&freemem / 1024)."n";

print "total swap: ".(&totalswap / 1024)."n";
print "free swap: ".(Sys::MemInfo::get("freeswap") / 1024)."n";

Sys::MemInfo return the total amount of free and used physical memory in bytes in totalmem and freemem variables.
Total amount of free and user swap memory are alse returned in totalswap and freeswap variables.

This module has been tested on Linux 2.6.10, UnixWare 7.1.2, AIX5, OpenBSD 3.8, NetBSD 2.0.2, FreBSD 5.4, HPUX11, Solaris 9, Tru64 5.1, Irix 6.5, Mac OS X 10.2 darwin and Windows XP.
It should work on FreeBSD 4 and Windows 9X/ME/NT/200X/Vista.

METHODS

availkeys

Return list of all accessor keys (freemem, totalmem, etc.) This is useful for dumping out all known information from the object by calling get() on all of the returned keys.

freemem

Returns free physical memory in bytes.

freeswap

Returns free swap space in bytes.

get

Returns the value of the passed key.

totalmem

Returns total physical memory size in bytes.

totalswap

Returns total swap space in bytes.

JImage-Analyst is a JAVA based library for extracting meta information from various image file formats.
Main features:
- Supported Image formats: BMP, CUR, GIF, ICO, IFF, JPEG, PCX, PNG, PNM (PBM, PGM, PPM), PSD, RAS, SWF, TGA, TIFF, XCF
- The following information are available:
- The format
- The mime type
- Dimension (width / height)
- Physical width and height (in DPI and inch)
- Bits per pixel
- Whether the image is progressive
- Comments from the image (such as in JPEG files)
- Number of images (such as with animated GIFs)
- High speed and low memory consumption
- No dependencies on 3rd party libraries
- No dependencies on AWT classes
- An architecture that allows to ass further formats very easily
Examples:
File file = new File("test.gif");
JImageAnalyst analyst = JImageAnalystFactory.getDefaultInstance();
ImageInfo imageInfo = analyst.analyze(file);
System.out.println("Format: " + imageInfo.getFormat());
System.out.println("MIME-Type: " + imageInfo.getMimeType());
System.out.println("Width: " + imageInfo.getWidth());
System.out.println("Height: " + imageInfo.getHeight());
System.out.println("BitsPerPixel: " + imageInfo.getBitsPerPixel());
// ... more information is available in imageInfo ...

Gpart is a tool which tries to guess the primary partition table of a PC-type hard disk in case the primary partition table in sector 0 is damaged, incorrect or deleted. The guessed table can be written to a file or device. Supported (guessable) filesystem or partition types by Gpart are:
- DOS/Windows FAT (FAT 12/16/32)
- Linux ext2
- Linux swap partitions versions 0 and 1 (Linux >= v2.2.X)
- OS/2 HPFS
- Windows NT/2000 FS
- *BSD disklabels
- Solaris/x86 disklabels
- Minix FS
- Reiser FS
- Linux LVM physical volume module (LVM by Heinz Mauelshagen)
- SGI XFS on Linux
- BeOS filesystem
- QNX 4.x filesystem
Enhancements:
- New support for the following filesystems: BeOS, QNX 4.x & SGI XFS.
- Updated Reiser filesystem support (Francis Devereux).
- Updated LVM support.
- Several small fixes from contributors.