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Turning light into power, solar arrays are a must-have for the vast majority of satellites.
With solar arrays sized according to the power needs of the mission, there might be thousands of individual solar cells crammed onto a typical satellite.
The design seen here is a thin version of the European 3G30 triple-junction gallium arsenide solar cell. Produced by Azur Space Solar Power, it is one of the most efficient in the world.
It was 60 years ago this month that the first practical solar (or ‘photovoltaic’ cell) was demonstrated at Bell Labs in New Jersey, USA. This new invention’s very first practical use was in powering early satellites, and solar cells remain pivotal to the space industry to this day.
But photovoltaic electricity generation is also on the way to becoming a major terrestrial energy source, projected to supply close to 3% of global electricity demand by 2020.
This bright future will be the focus of the European Photovoltaic Solar Energy Conference and Exhibition in Amsterdam, the Netherlands, this September.
Thousands of experts will discuss the progress of photovoltaic technology across – as well as off – the planet.
Historically, the space industry has helped to drive advances in photovoltaics. For instance, the gallium arsenide cells powering today’s satellites are more than twice as efficient as those installed on domestic rooftops.
With such successes in mind, ESA has begun an initiative devoted to the synergies between space and energy technology called Space for Energy, with solar energy a major element.
Meanwhile, next week sees the ESA-organised European Space Power Conference in Noordwijkerhout, the Netherlands, covering all aspects of electrical power for space missions, including batteries, power components and nuclear power.
Credit: Azur Space Solar Power
A look from the lower level down the long cell block of an abandoned maximum security prison. The prison has been closed for over a decade & initially was planned on being repurposed however for reasons unknown to me this had never happened. In fact there doesn't even seem to really be much of an effort at repurposing the prison aside from removing records, bedding, clothing & majority of the furniture.
Thank you very much for all your kindness. I and my families and my friends are all ok (so far)! As you know, there was a huge earthquake yesterday afternoon. I was in Tokyo when the series of the earthquakes occurred. All the train in metropolitan areas had been stopped for many hours in order to check the safety(not due to derailed or accidents). We had to go home on foot. I saw some bumped roads and cracks on the way to home, as long as I saw, there were no serious corruption of the buildings or houses around my town.
According to the further news report, the residential areas in my prefectures haven't had serious damage so far, excepting some sad individual accidents, But North parts of the main land of Japan(the center area of the earthquakes) have horrible and severe damages by quakes, tsunamis and fire.
I have never experienced such a huge earthquake. Still, aftershocks(it's weak) occur every half or an hour. Although aftershocks are getting fewer and weaker, we must keep eyes on them and try to prepare for next possible huge earthquakes as much as possible.
I am very sorry about all the victims and their families. We started to know the damage are much more serious than we thought.
Lately huge earthquakes occurred all over the world, please take good cares of an earthquake and tsunamis they cause!
A prison cell in Kilmainham Gaol. Shot through a peep hole in the door.
The tours at Dublin Castle and Kilmainham Gaol complemented each other nicely, and offered interesting information about the events that led to Irish independence.
EDIT: This is my most blogged photo. Some examples from the referrer stats (and there must be more, because not everyone links back to this page):
The base photos used here, slightly modified by me of course, were from cell cultures done by Elizabeth Normand here at Brown University. The cells are transfected with proteins that fluoresce if the protein is expressed by the cell and much of the color you see is merely enhanced but not changed.
One of several cell blocks. Most radiated from a central area like a huge flower. Though the architectural style was built to resemble a mediaeval fortress. You would not want to be interred here, particularly in its first 100 years.
Normal blood cells (left) and the blood cells in Sickle cell disease, which do not flow through the circulatory system smoothly.
Credit: Darryl Leja, NHGRI.
Here it is guys! My entry into McLaren's design competition.
Performance
• Acceleration: 0-100 km/h in 2.0
• Top Speed: (electronically limited): 350km/h
• Braking: 97-0 in 2.5 seconds (in 30 meters).
• Fuel Consumption: 8.3L/100km/h
Design
Drivetrain:
• 5 liter counter-rotating flatplane twin crank V8
• Variable ratio twin screw supercharger
• 6-speed triple clutch gearbox with KERS and hybrid 500kW electric motor
Chassis:
• Carbon cockpit tub with titanium rollover frame
• Titanium trellis front subframe with inboard suspension
• Rear suspension mounted directly to engine and gearbox
• Forged magnesium wheels and airless tires with internal aluminium skeleton
Computer:
• 1.2 Billion bit solid state optical processor with braided carbon nanotube optical paths
• Honeycomb aluminium nitrogen cooling cell in center of bonnet
Specs credit goes to my good friend Kieran.
Let me know what you think!
Fort Brockhurst Prison Cell - 1860
I can't explain how uneasy just being in this old Army cell made me feel. It was a very uncomfortable feeling. It was dark and damp and impossible to see out of the high level window. Deeply intimidating.
The dark green moss on the arched ceiling highlighting just how damp the cells were. This was because the roofs of the buildings were covered with several feet of soil as protection against shell and mortar fire. The downside being - the ceilings and walls were like basements, surrounded by soil.
I don't suppose it was worth saying to the Army doctor, "I don't think those mould spores will do my chest and lungs any good. Please let me out of the cell."
taken at the botanical garden in potsdam
press 'all sizes' and then 'F11' to see the image in full size (!)
This image shows pancreatic cancer cells (nuclei in blue) growing as a sphere encased in membranes (red). By growing cancer cells in the lab, researchers can study factors that promote and prevent the formation of deadly tumors.
This image was originally submitted as part of the 2016 NCI Cancer Close Up project and selected for exhibit.
See also visualsonline.cancer.gov/closeup2016.
Credit:Min Yu (Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC),USC Norris Comprehensive Cancer Center, Pancreatic Desmoplasia