Monday, September 20, 2010

FHSST - Free Books for 10th And 12 th Class Studens in South Africa

South ആഫ്രിക്കയിലെ പത്താം ക്ലാസിലും പന്ത്രണ്ടാം ക്ലാസിലുമുള്ള കുട്ടികള്‍ക്ക് പഠിക്കാന്‍ ഉള്ള പുസ്തകങ്ങള്‍ ഫ്രീയായി നല്‍കാനുള്ള സംരംഭമാണിത്. ഇത് ഫ്രീയായി ആര്‍ക്കും ഡൌണ്‍ലോഡ് ചെയ്യാം.
ഫ്രീ ലൈസന്‍സിലാണ് ഇവ പ്രസിദ്ധീകരിച്ചിരിക്കുന്നത്. നമ്മുടെ കുട്ടികള്‍ക്ക് അധിക വായനക്കും ചിലപ്പോള്‍ പാഠപുസ്തക നിര്‍മ്മാണത്തിലേക്കും ഇത് സഹായകമാകും

ഭാവിയില്‍ നമുക്കും ഈരീതി സ്വീകരിക്കാം. കേരളത്തിലെ കുട്ടികളുടെ പുസ്തകം തയ്യാറാക്കാന്‍ എല്ലാ ആളുകള്‍ക്കും ഇടപെടാവുന്നതും തിരുത്താവുന്നതുമായ ഒരു പ്ലാറ്റ്ഫോം it@school തുടങ്ങുമല്ലോ?

PDF ഇവിടെ.


Physical Science

Check This about the plan

Thursday, February 21, 2008

How to setup Sun's Java JDK on Fedora 8

  1. Download the Linux Platform - Java SE Development Kit 6 Update 3 from and install it. - Help I can't find it
  2. Make sure that you have version 1.7+ of the jpackage utilities installed, then download and install the JPackage sun-compat RPM (this handles your alternatives) from
    • # rpm -qa | grep jpackage
    • java-1.6.0-sun-compat- - Help I can't find it
  3. Yum download and install compat-libstdc++-33 - (The browser plugin will not work without this)
    • yum install compat-libstdc++-33
  4. Fix the Xinerama bug by updating libxcb to version 1.0-4 or later - (The browser plugin will not work without this)
    • yum update libxcb
    • If you can't or don't want to do that you can modify the file directly
      sed -i 's/XINERAMA/FAKEEXTN/g' /usr/java/jdk1.6.0_03/jre/lib/i386/xawt/
    • If you've updated your system after you installed it, libxcb is probably good
  5. Delete the link in /usr/lib/mozilla/plugins that the jpackage rpm just installed - it isn't needed
    • cd /usr/lib/mozilla/plugins
    • # rm
    • Caution: Do not delete
  6. You will want to make the java plugin configurable with alternatives, run the command below to add the Sun Java plugin to alternatives
    • /usr/sbin/alternatives --verbose --install /usr/lib/mozilla/plugins/ /usr/lib/jvm/jre-sun/plugin/i386/ns7/ 16000 - (all on one line)
  7. Select the Java versions that you want with the alternatives program - alternatives - huh?
You do not have to remove IcedTea to get Sun's Java to work!

This works for x86_64 as well however the Sun Java plugin will not work with x86_64. So if you are using x86_64 you are limited to the icedtea plugin.

If you have used this site to install Sun's Java on F8, or you find any problems, corrections or simplifications that you can suggest, please email me at sunjava at rabbitbrush dot frazmtn dot com.

Thursday, October 11, 2007

This Year Nobel Prize In Physics

The Nobel Prize in Physics 2007

"for the discovery of Giant Magnetoresistance"
Albert Fert Peter Grünberg
Photo: B. Fert, Invisuphoto Photo: © Forschungszentrum Jülich
Albert Fert Peter Grünberg
half 1/2 of the prize half 1/2 of the prize
France Germany
Université Paris-Sud; Unité Mixte de Physique CNRS/THALES
Orsay, France
Forschungszentrum Jülich
Jülich, Germany
b. 1938 b. 1939

Nano Technology gives sensitive read-out heads for compact hard disks

This year's physics prize is awarded for the technology that is used to read data on hard disks. It is thanks to this technology that it has been possible to miniaturize hard disks so radically in recent years. Sensitive read-out heads are needed to be able to read data from the compact hard disks used in laptops and some music players, for instance.

In 1988 the Frenchman Albert Fert and the German Peter Grünberg each independently discovered a totally new physical effect – Giant Magnetoresistance or GMR. Very weak magnetic changes give rise to major differences in electrical resistance in a GMR system. A system of this kind is the perfect tool for reading data from hard disks when information registered magnetically has to be converted to electric current. Soon researchers and engineers began work to enable use of the effect in read-out heads. In 1997 the first read-out head based on the GMR effect was launched and this soon became the standard technology. Even the most recent read-out techniques of today are further developments of GMR.

A hard disk stores information, such as music, in the form of microscopically small areas magnetized in different directions. The information is retrieved by a read-out head that scans the disk and registers the magnetic changes. The smaller and more compact the hard disk, the smaller and weaker the individual magnetic areas. More sensitive read-out heads are therefore required if information has to be packed more densely on a hard disk. A read-out head based on the GMR effect can convert very small magnetic changes into differences in electrical resistance and there-fore into changes in the current emitted by the read-out head. The current is the signal from the read-out head and its different strengths represent ones and zeros.

The GMR effect was discovered thanks to new techniques developed during the 1970s to produce very thin layers of different materials. If GMR is to work, structures consisting of layers that are only a few atoms thick have to be produced. For this reason GMR can also be considered one of the first real applications of the promising field of nanotechnology.

Albert Fert, French citizen. Born 1938 in Carcassonne, France. Ph.D. in 1970 at Université Paris-Sud, Orsay, France. Professor at Université Paris-Sud, Orsay, France, since 1976. Scientific director of Unité mixte de physique CNRS/Thales, Orsay, France, since 1995.

Peter Grünberg, German citizen. Born 1939 in Pilsen. Ph.D. in 1969 at Technische Universität Darmstadt, Germany. Professor at Institut für Festkörperforschung, Forschungszentrum Jülich, Germany, since 1972.

Thursday, February 8, 2007

Perpetual Motion

The documented search for perpetual motion begins in the 13th century. Villard de Honnescourt drew designs for such machines at that time. There may be earlier designs, but perpetual motion is closely linked to machines, especially rotating machines, and machines are neither widespread nor very sophisticated before this time. Before the invention of electric or gasoline motors there were limited ways to supply power to do work. Waterwheels, tidewheels, and windmills supplied power only in certain locations; man and animals supplied all the portable power. People who had no access to a suitable stream, estuary, or windy hill-top sought alternatives, and inventors attempted to supply them with perpetual motion machines. The search continues to the present day. More recent designs for perpetual motion appear in response to crises, like the energy crisis, or high costs of fuels, or some poorly understood technological need.

Perpetual motion refers to a condition in which an object continues to move indefinitely without being driven by an external source of energy. In effect by its very definition, Perpetual Motion is a system wherein the item in question consumes and outputs at least 100% of its energy constantly, sustaining no net loss as a result of the laws of thermodynamics. Using modern terminology, any machine that purports to produce more energy than it uses is a "perpetual motion machine", although somewhat oddly named as they may not include any moving parts.