(no subject)
Dedicated to Emily: A test of word capness
Sad but true: "Battlestar Galactica" will end its run next year after its fourth and final season.
After weeks of speculation, the end is in fact near. According to a high level source at Sci Fi Channel parent company NBC Universal, the show will dock after its next 22-episode season, slated to kick off in early 2008.
Sources say the decision came down from executive producers Ronald D. Moore and David Eick, who are said to feel creatively like this upcoming arc will be its last.
Rumors began circulating this month when two "Battlestar Galactica" stars, Edward James Olmos and Katee Sackhoff, referred to the next season as the show's swan song while attending the annual Saturn Awards.
“It’s the final season, so it’s definitely going to be the most vicious,” Olmos told reporters. “As far as we know, in respects of the way we have this show constructed, this is the final season.”
Sci Fi Channel is expected to announce the news as soon as this afternoon.
UPDATE: Minutes after this was posted, Sci Fi Channel sent us the press release confirming the show is ending. See what Eick and Moore have to say after the jump...
"This show was always meant to have a beginning, a middle and finally, an end. Over the course of the last year, the story and the characters have been moving strongly toward that end and we've decided to listen to those internal voices and conclude the show on our own terms," Eick and Moore said in the statement. "And while we know our fans will be saddened to know the end is coming, they should brace themselves for a wild ride getting there -- we're going out with a bang ."
-- Denise Martin
Scientists from Spectrolab, Inc., a subsidiary of Boeing, have recently published their research on the fabrication of solar cells that surpass the 40% efficiency milestone-the highest efficiency achieved for any photovoltaic device. Their results appear in a recent edition of Applied Physics Letters.
Most conventional solar cells used in today’s applications, such as for supplemental power for homes and buildings, are one-sun, single-junction silicon cells that use only the light intensity that the sun produces naturally, and have optimal efficiency for a relatively narrow range of photon energies.
The Spectrolab group experimented with concentrator multijunction solar cells that use high intensities of sunlight, the equivalent of 100s of suns, concentrated by lenses or mirrors. Significantly, the multijunction cells can also use the broad range of wavelengths in sunlight much more efficiently than single-junction cells.
"These results are particularly encouraging since they were achieved using a new class of metamorphic semiconductor materials, allowing much greater freedom in multijunction cell design for optimal conversion of the solar spectrum," Dr. Richard R. King, principal investigator of the high efficiency solar cell research and development effort, told PhysOrg.com. "The excellent performance of these materials hints at still higher efficiency in future solar cells."
In the design, multijunction cells divide the broad solar spectrum into three smaller sections by using three subcell band gaps. Each of the subcells can capture a different wavelength range of light, enabling each subcell to efficiently convert that light into electricity. With their conversion efficiency measured at 40.7%, the metamorphic multijunction concentrator cells surpass the theoretical limit of 37% of single-junction cells at 1000 suns, due to their multijunction structure.
While Spectrolab's primary business is supplying PV cells and panels to the aerospace industry (many of their solar cells are used on satellites currently in orbit), the company envisions that this breakthrough will also have applications in commercial terrestrial solar electricity generation.
The research that led to the discovery of the high efficiency concentrator solar cell was funded partly by the U.S. Department of Energy’s National Renewable Energy Laboratory, and will play a significant role in the government’s Solar America Initiative, which aims to make solar energy cost-competitive with conventional electricity generation by 2015. The company has said that these solar cells could help concentrator system manufacturers produce electricity at a cost that is competitive with electricity generated by conventional methods today.
The Spectrolab scientists also predict that with theoretical efficiencies of 58% in cells with more than three junctions using improved materials and designs, concentrator solar cells could achieve efficiencies of more than 45% or even 50% in the future.
Citation: King, R. R., Law, D. C., Edmondson, K. M., Fetzer, C. M., Kinsey, G. S., Yoon, H., Sherif, R. A., and Karam, N. H. “40% efficient metamorphic GaInP/GaInAs/Ge multijunction solar cells.” Applied Physics Letters 90, 183516 (2007).
Sad but true: "Battlestar Galactica" will end its run next year after its fourth and final season.
After weeks of speculation, the end is in fact near. According to a high level source at Sci Fi Channel parent company NBC Universal, the show will dock after its next 22-episode season, slated to kick off in early 2008.
Sources say the decision came down from executive producers Ronald D. Moore and David Eick, who are said to feel creatively like this upcoming arc will be its last.
Rumors began circulating this month when two "Battlestar Galactica" stars, Edward James Olmos and Katee Sackhoff, referred to the next season as the show's swan song while attending the annual Saturn Awards.
“It’s the final season, so it’s definitely going to be the most vicious,” Olmos told reporters. “As far as we know, in respects of the way we have this show constructed, this is the final season.”
Sci Fi Channel is expected to announce the news as soon as this afternoon.
UPDATE: Minutes after this was posted, Sci Fi Channel sent us the press release confirming the show is ending. See what Eick and Moore have to say after the jump...
"This show was always meant to have a beginning, a middle and finally, an end. Over the course of the last year, the story and the characters have been moving strongly toward that end and we've decided to listen to those internal voices and conclude the show on our own terms," Eick and Moore said in the statement. "And while we know our fans will be saddened to know the end is coming, they should brace themselves for a wild ride getting there -- we're going out with a bang ."
-- Denise Martin
Scientists from Spectrolab, Inc., a subsidiary of Boeing, have recently published their research on the fabrication of solar cells that surpass the 40% efficiency milestone-the highest efficiency achieved for any photovoltaic device. Their results appear in a recent edition of Applied Physics Letters.
Most conventional solar cells used in today’s applications, such as for supplemental power for homes and buildings, are one-sun, single-junction silicon cells that use only the light intensity that the sun produces naturally, and have optimal efficiency for a relatively narrow range of photon energies.
The Spectrolab group experimented with concentrator multijunction solar cells that use high intensities of sunlight, the equivalent of 100s of suns, concentrated by lenses or mirrors. Significantly, the multijunction cells can also use the broad range of wavelengths in sunlight much more efficiently than single-junction cells.
"These results are particularly encouraging since they were achieved using a new class of metamorphic semiconductor materials, allowing much greater freedom in multijunction cell design for optimal conversion of the solar spectrum," Dr. Richard R. King, principal investigator of the high efficiency solar cell research and development effort, told PhysOrg.com. "The excellent performance of these materials hints at still higher efficiency in future solar cells."
In the design, multijunction cells divide the broad solar spectrum into three smaller sections by using three subcell band gaps. Each of the subcells can capture a different wavelength range of light, enabling each subcell to efficiently convert that light into electricity. With their conversion efficiency measured at 40.7%, the metamorphic multijunction concentrator cells surpass the theoretical limit of 37% of single-junction cells at 1000 suns, due to their multijunction structure.
While Spectrolab's primary business is supplying PV cells and panels to the aerospace industry (many of their solar cells are used on satellites currently in orbit), the company envisions that this breakthrough will also have applications in commercial terrestrial solar electricity generation.
The research that led to the discovery of the high efficiency concentrator solar cell was funded partly by the U.S. Department of Energy’s National Renewable Energy Laboratory, and will play a significant role in the government’s Solar America Initiative, which aims to make solar energy cost-competitive with conventional electricity generation by 2015. The company has said that these solar cells could help concentrator system manufacturers produce electricity at a cost that is competitive with electricity generated by conventional methods today.
The Spectrolab scientists also predict that with theoretical efficiencies of 58% in cells with more than three junctions using improved materials and designs, concentrator solar cells could achieve efficiencies of more than 45% or even 50% in the future.
Citation: King, R. R., Law, D. C., Edmondson, K. M., Fetzer, C. M., Kinsey, G. S., Yoon, H., Sherif, R. A., and Karam, N. H. “40% efficient metamorphic GaInP/GaInAs/Ge multijunction solar cells.” Applied Physics Letters 90, 183516 (2007).