Wednesday, July 8, 2009

The world's first fuel cell glider makes maiden flight

The world's only piloted aircraft using fuel cell propulsion technology took off from Hamburg airport on Tuesday on its first public flight, proving that hydrogen-powered transportation is not a pipe dream. During its 10-minute maiden flight, the Antares DLR-H2 aircraft was piloted by Axel Lange, the 46-year-old head of one of the companies which adapted the motor-assisted glider to demonstrate the new technology.


The current propulsion model and aerodynamics of the glider allows a top speed of about 170 kilometres per hour, but work is already well advanced to raise that to 300 kph.
The air-cooled stack in the fuel cell system uses Polymer electrolyte membrane (PEM) technology based on BASF’s Celtec membrane electrode assemblies and a stack supplied by Serenergy. A PEM fuel cell, which operates at between 120°C and 180°C, uses hydrogen fuel and oxygen from the air to produce electricity. The potential power generated by a fuel stack depends on the number and size of the individual fuel cells that make up the stack and the surface area of the PEM.
DLR isn’t the only one making moves in this area. In a test earlier this year Airbus powered an aircraft system with a conventional hydrogen and oxygen based fuel cell that generated up to 20kW to power the aircraft’s back-up hydraulic circuit, an electric motor pump, and ailerons. Boeing Research and Technology Europe modified a two-seat Diamond Aircraft Dimona motor glider with a PEM fuel cell/lithium-ion battery hybrid to power an electric motor coupled to a conventional propeller.
DLR says that although results from the test are promising, more research needs to be done, and points out that the Antares trial is just one part of a larger process.


## German fuel cell plane makes maiden flight

Wednesday, April 22, 2009

Thursday, March 12, 2009

Tuesday, March 3, 2009

Professor Anpo's last Lecture

In appreciation to the people I met through my education and research work.







Professor Anpo's last Lecture

Thursday, January 29, 2009

Thursday, December 18, 2008

Yalda has believed to be the Sun's rebirth!

Yalda means birth. It is used interchangeably with “Shab e Cheleh” a Zoroastrian celebration of the Winter Solstice around Dec. 21st. Most Midwinter celebrations fall around the time of the Winter Solstice and share stories that revolve around the victory of light over darkness and the rebirth of the Sun. And Yalda is no exception.

Yalda means birth. It is used interchangeably with Shab e Cheleh' a Zoroastrian celebration of the Winter Solstice around Dec. 21st. Most Midwinter celebrations fall around the time of the Winter Solstice and share stories that revolve around the victory of light over darkness and the rebirth of the Sun. And Yalda is no exception.
Yalda is a festival that is thought to have been adopted by the Persians from the Babylonians. The last day of the Persian month of Azar is the longest night of the year, when the forces of Ahriman or darkness are thought to be at their peak. The next day which is the first day of the month called Day is known as khoram rooz or khore rooz which means the day of the sun. This day belongs to the creator Ahura Mazda, the Lord of Wisdom. With the return of the sun, the days get longer and the nights get shorter, which means that the sun has once again won a victory over the darkness.


Fires would burn all night in order to guarantee that Ahriman was defeated. Feasting, acts of charity, and deity worship were all a part of Yalda. Prayers to Mithra, the Sun God were sent heavenward to ensure that the Sun would rise with the "light of the early morning." It was thought that at this special time, Ahurz Mazda would grant wishes, especially to couples who wished to blessed with children.

During the festival masters and servants would reverse roles. A mock king was crowned and festivities abounded. The belief in the Persian culture at that time was that the first creation was order that came out of chaos. Therefore, roles were reversed and disorder and chaos reigned until the end of the festival. In fact, the Roman festival of Saturnalia was borrowed from the festival of Yalda at a later date.

Yalda is more of a social occasion than a festival. Friends and families visit one another for poetry readings from the poems of Hafez, a 14th century poet who still has a large following in Iranian households. It is tradition to make a wish, open a page of his poems randomly and look for the answer to the wish in that particular poem. Dried nuts, seeds and fresh winter fruits are popular fare at this time.
Family members would gather around a specially designed short wooden table covered with large quilts and blankets under which a small charcoal fire is burning. This table was called the corsi. Everyone would curl up underneath and even ate and slept there. In modern times, electrical heaters have replaced the corsi, but the tradition is still kept alive.
It seems ironic to me that at this time of year, when both of our countries are celebrating the return of the light, and coming together as family and friends, that we can be at war with one another. When I think of a family in Iran curled up together under the corsi, listening to grandparents tell tales of long ago, I can superimpose a family in America, sitting in front of a lighted Christmas tree, listening to grandparents tell tales of long ago. It is not those families that are in dispute with one another. We are not at war. We are human being sharing a night of love and wisdom with our families. Isn't it a shame that a conflict caused by politics, and a very tiny portion of a population can wreak such chaos?

Love, Light, Happy Yalda and Merry Christmas.

## Christmas,Yalda, and MithraÏsm

Sunday, December 7, 2008