Monday, February 18, 2008

Free Software and Open Source


Free software is software that can be used, studied, and modified without restriction, and which can be copied and redistributed in modified or unmodified form either without restriction, or with restrictions only to ensure that further recipients can also do these things. To make these acts possible, the human readable form of the program (called the source code) must be made available. The source code may be either accompanied by a software license saying that the copyright holder permits these acts (a free software license), or be released into public domain, so that these rights automatically hold.

Free software is distinct from freeware; freeware is proprietary software made available free of charge. One can use, but not study, modify or redistribute freeware.

The definition, written by Richard Stallman, is still maintained today and states that software is free software if people who receive a copy of the software have the following four freedoms:
  • Freedom 0: The freedom to run the program for any purpose.
  • Freedom 1: The freedom to study and modify the program.
  • Freedom 2: The freedom to copy the program so you can help your neighbor.
  • Freedom 3: The freedom to improve the program, and release your improvements to the public, so that the whole community benefits.
Freedoms 1 and 3 require source code to be available because studying and modifying software without its source code is highly impractical.

In the late 90s, other groups published their own definitions which describe an almost identical set of software. The most notable are Debian Free Software Guidelines published in 1997, and the Open Source Definition, published in 1998.

Open source is a set of principles and practices on how to write software, the most important of which is that the source code is openly available. The Open Source Definition, which was created by Bruce Perens[ and Eric Raymond and is currently maintained by the Open Source Initiative, adds additional meaning to the term: one should not only get the source code but also have the right to use it.

The Open Source Definition, licenses must meet ten conditions in order to be considered open source licenses. Below is a copy of the definition. It was taken under fair use.
  1. Free Redistribution: the software can be freely given away or sold. (This was intended to encourage sharing and use of the software on a legal basis.)
  2. Source Code: the source code must either be included or freely obtainable. (Without source code, making changes or modifications can be impossible.)
  3. Derived Works: redistribution of modifications must be allowed. (To allow legal sharing and to permit new features or repairs.)
  4. Integrity of The Author's Source Code: licenses may require that modifications are redistributed only as patches.
  5. No Discrimination Against Persons or Groups: no one can be locked out.
  6. No Discrimination Against Fields of Endeavor: commercial users cannot be excluded.
  7. Distribution of License: The rights attached to the program must apply to all to whom the program is redistributed without the need for execution of an additional license by those parties.
  8. License Must Not Be Specific to a Product: the program cannot be licensed only as part of a larger distribution.
  9. License Must Not Restrict Other Software: the license cannot insist that any other software it is distributed with must also be open source.
  10. License Must Be Technology-Neutral: no click-wrap licenses or other medium-specific ways of accepting the license must be required.

Tuesday, February 12, 2008

In Hungry Haiti, Dirt Is Food


It was lunchtime in one of Haiti's worst slums, and Charlene Dumas was eating mud.

With food prices rising, Haiti's poorest can't afford even a daily plate of rice, and some take desperate measures to fill their bellies.

Charlene, 16 with a 1-month-old son, has come to rely on a traditional Haitian remedy for hunger pangs: cookies made of dried yellow dirt from the country's central plateau.

The mud has long been prized by pregnant women and children here as an antacid and source of calcium. But in places like Cite Soleil, the oceanside slum where Charlene shares a two-room house with her baby, five siblings and two unemployed parents, cookies made of dirt, salt and vegetable shortening have become a regular meal.

"When my mother does not cook anything, I have to eat them three times a day," Charlene said. Her baby, named Woodson, lay still across her lap, looking even thinner than the slim 6 pounds 3 ounces he weighed at birth.

Though she likes their buttery, salty taste, Charlene said the cookies also give her stomach pains. "When I nurse, the baby sometimes seems colicky too," she said.

Food prices around the world have spiked because of higher oil prices, needed for fertilizer, irrigation and transportation. Prices for basic ingredients such as corn and wheat are also up sharply, and the increasing global demand for biofuels is pressuring food markets as well.

The problem is particularly dire in the Caribbean, where island nations depend on imports and food prices are up 40 percent in places.

The global price hikes, together with floods and crop damage from the 2007 hurricane season, prompted the U.N. Food and Agriculture Agency to declare states of emergency in Haiti and several other Caribbean countries. Caribbean leaders held an emergency summit in December to discuss cutting food taxes and creating large regional farms to reduce dependence on imports.

At the market in the La Saline slum, two cups of rice now sell for 60 cents, up 10 cents from December and 50 percent from a year ago. Beans, condensed milk and fruit have gone up at a similar rate, and even the price of the edible clay has risen over the past year by almost $1.50. Dirt to make 100 cookies now costs $5, the cookie makers say.

Still, at about 5 cents apiece, the cookies are a bargain compared to food staples. About 80 percent of people in Haiti live on less than $2 a day and a tiny elite controls the economy.

Merchants truck the dirt from the central town of Hinche to the La Saline market, a maze of tables of vegetables and meat swarming with flies. Women buy the dirt, then process it into mud cookies in places such as Fort Dimanche, a nearby shanty town.

Carrying buckets of dirt and water up ladders to the roof of the former prison for which the slum is named, they strain out rocks and clumps on a sheet, and stir in shortening and salt. Then they pat the mixture into mud cookies and leave them to dry under the scorching sun.

The finished cookies are carried in buckets to markets or sold on the streets.

A reporter sampling a cookie found that it had a smooth consistency and sucked all the moisture out of the mouth as soon as it touched the tongue. For hours, an unpleasant taste of dirt lingered.

Assessments of the health effects are mixed. Dirt can contain deadly parasites or toxins, but can also strengthen the immunity of fetuses in the womb to certain diseases, said Gerald N. Callahan, an immunology professor at Colorado State University who has studied geophagy, the scientific name for dirt-eating.

Haitian doctors say depending on the cookies for sustenance risks malnutrition.

"Trust me, if I see someone eating those cookies, I will discourage it," said Dr. Gabriel Thimothee, executive director of Haiti's health ministry.

Marie Noel, 40, sells the cookies in a market to provide for her seven children. Her family also eats them.
"I'm hoping one day I'll have enough food to eat, so I can stop eating these," she said. "I know it's not good for me."

Monday, January 7, 2008

YEAR 2008

Year 2008 is declared as:

International Year of the Potato
The year 2008 has been declared the International Year of the Potato by the United Nations, noting that the potato is a staple food in the diet of the world’s population, and affirming the need to focus world attention on the role that the potato can play in providing food security and eradicating poverty. Food and Agriculture Organization is invited to facilitate its implementation.

The corresponding resolution adopted on 25 November 2005 by the Food and Agriculture Organization, which is to facilitate the implementation of the year, affirmed "the need to revive public awareness of the relationship that exists between poverty, food security, malnutrition and the potential contribution of the potato to defeating hunger."

International Year of Sanitation
Proper sanitation: It’s a seemingly mundane thing that most people in the developed world take for granted. But at least 2.6 billion people – some 41 percent of the global population - do not have access to latrines or any sort of basic sanitation facilities. As a result millions suffer from a wide range of preventable illnesses, such as diarrhoea, which claim thousands of lives each day, primarily young children. Improving access to sanitation is a good investment because:
  • Sanitation is vital for human health
  • Sanitation generates economic benefits
  • Sanitation contributes to dignity and social development
  • Sanitation helps the environment
  • Improving sanitation is achievable!
To put the spotlight on this issue the UN General Assembly declared the year 2008 the International Year of Sanitation. The goal is to raise awareness and to accelerate progress towards the Millennium Development Goal (MDG) target to reduce by half the proportion of people without access to basic sanitation by 2015.

International Year of Planet Earth
The United Nations General Assembly, meeting in New York, has proclaimed the year 2008 to be the United Nations International Year of Planet Earth. The activities will span 2007-2009.
Thrust areas will be
  • Reduce risks for society caused by natural and human-induced hazards
  • Reduce health problems by improving understanding of the medical aspects of Earth science
  • Discover new natural resources and make them available in a sustainable manner
  • Build safer structures and expand urban areas, utilizing natural subsurface conditions
  • Determine the non-human factor in climatic change
  • Enhance understanding of the occurrence of natural resources so as to contribute to efforts to reduce political tension
  • Detect deep and poorly accessible groundwater resources
  • Improve understanding of the evolution of life
  • Increase interest in the Earth sciences in society at large
  • Encourage more young people to study Earth science in university
Year of the Frog
This year will also be observed as the Year of the Frog, in order to prevent 500 frog species from being extinct. “Largely our campaign is targeted at the zoo community,” said Kevin Zippel, program director for Amphibian Ark, the international conservation organisation behind this concept.

LONDON - Conservationists from around the world have declared 2008 the Year of the Frog to highlight their new campaign to save threatened amphibians from extinction.

The World Association of Zoos and Aquariums (WAZA) said on Friday that up to half of amphibian species could be wiped out in coming years through habitat loss and climate change - the biggest mass extinction since dinosaurs disappeared.

"It's imperative that the world zoo and aquarium community plays an active role in working to save the planet's critically endangered amphibian species," said WAZA president Karen Sausman following the decision at a meeting in Budapest.

The year of the frog campaign is aiming to raise $60 million to try to save frogs. “We have pretty lofty goals,” said Zippel, adding that the year would be a success even if just one of those 500 species were saved.

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