Samstag, 28. November 2009

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Dienstag, 13. Oktober 2009

Tihar- The Festival of Lights

source:wikipedia.org, www.google.com
Tihar is a five-day Nepalese festival celebrated in late autumn, which comes soon after Dashain. One of these days incorporates the Hindu festival Deepavali Although all ethnic groups celebrate it. The festival is celebrated from Trayodashi of Kartik Krishna to Katrik Shukla Dwitiya every year.The name Tiharmeans the festival of lights, explaining the many candles lighted.The five day festival is considered to be of great importance as it shows reverence to not just the humans and the Gods, but also to the animals like crow, cow and dog, who maintain an intense relationship with the humans.
Tihar Mangal Dhoon
Kag Puja
The first day of the festival is called Kag Puja or Kag Parva - Worship of Crows. The crows are worshipped by offerings of sweets and dishes. The cawing of the crows symbolises sadness and grief in the Hindu mythology, so the devotees offer the crows food to avert grief and deaths in their homes.
Kukur Puja
The second day is called Kukur Puja or Khicha Puja by the Newars - Worship of Dogs. Dog, which is believed to be messenger of Lord Yamaraj, the god of death, is worshipped once a year on this day. People offer garland, teeka and delicious food to the animal, and acknowledge the cherished relationship between humans and the oldest ever tamed animal. This day is also observed as Narak Chaturdashi.
Gai Puja and Laxmi Puja
On the morning of the third day is Gai Puja - Worship of Cows, Cow is considered to be the surrogated mother of the human as per the Hindu myths, so they worship her with tika, garlands and fruits on the day. In the evening Laxmi, the goddess of wealth is worshipped. This day is called Laxmi Puja.The goddess is believed to enter the brightest house and give her blessings, making the family healthy and prosperous.
Gobhardan Puja and Maha Puja
On the fourth day of Tihar, there are three different known pujas. Most perform Goru Puja, or Worship of Oxen. People who follow Krishna perform Gobardhan Puja, which is worship towards Cowdung. Cowdung is seen as very useful in Nepal, as in the olden days it was used for everything from light at night (Methane) to polish for the mud floors of traditional houses. The Newar community on the night of this day do Maha Puja, or Worship of Self. Because this period is also the beginning of Nepal Sambat, or the new year of Nepalese especially commemorated by Newars, it ensures prosperity for the new year. The third and fourth day of Tihar is especially famous for DEUSI AND BHAILO, light and fireworks. Deusi and Bhailo are the songs which have only been sung on those Tihar days. Social workers, young and children visit local homes by singing those songs, and in return the homeowners give them money, fruit, rice and bread (Selroti, a special type of bread made by rice flour and sugar).The Deusi is mostly sung by the boys while the Bhailo is sung by the girls.
Bhai Tika
The fifth and last day of Tihar is Bhai Tika, a day where sisters put "Tika" on forehead of brothers, to ensure long life, and thank them for the protection they give.When the sisters give the "Tika", the brothers give gifts or money as a return. A special garland is made for the brothers out of a flower that wilts after a couple of months, symbolizing the sister's prayer of her brother's long life.

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Samstag, 3. Oktober 2009

The biofuel potential of municipal solid waste

Source: ScienceDaily (Oct. 3, 2009)
Garbage dump. Waste-based biofuel could cut global emissions by over 80%. (Credit: iStockphoto/Ryerson Clark)

Converting the rubbish that fills the world’s landfills into biofuel may be the answer to both the growing energy crisis and to tackling carbon emissions, claim scientists in Singapore and Switzerland. New research published in Global Change Biology: Bioenergy, reveals how replacing gasoline with biofuel from processed waste could cut global carbon emissions by 80%.
Biofuels produced from crops have proven controversial because they require an increase in crop production which has its own severe environmental costs. However, second-generation biofuels, such as cellulosic ethanol derived from processed urban waste, may offer dramatic emissions savings without the environmental catch.
“Our results suggest that fuel from processed waste biomass, such as paper and cardboard, is a promising clean energy solution,” said study author Associate Professor Hugh Tan of the National University of Singapore. “If developed fully this biofuel could simultaneously meet part of the world’s energy needs, while also combating carbon emissions and fossil fuel dependency.”
The team used the United Nation’s Human Development Index to estimate the generation of waste in 173 countries. This data was then coupled to the Earthtrends database to estimate the amount of gasoline consumed in those same countries.
The team found that 82.93 billion litres of cellulosic ethanol could be produced from the world’s landfill waste and that by substituting gasoline with the resulting biofuel, global carbon emissions could be cut by figures ranging from 29.2% to 86.1% for every unit of energy produced.
“If this technology continues to improve and mature these numbers are certain to increase,” concluded co-author Dr. Lian Pin Koh from ETH Zürich. “This could make cellulosic ethanol an important component of our renewable energy future.”

Journal reference: Shi et al. The biofuel potential of municipal solid waste. GCB Bioenergy, 2009; DOI: 10.1111/j.1757-1707.2009.01024.x

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