Wednesday 22 March 2017

Stanley John Whidden | What it's like to be a space tourist: get ready to feel awful

One of the first tourists to travel in outer space found it to be a bit of a buzzkill.
Sure, he loved every minute - even if he was physically miserable part of the time. The next wave of space tourists will need a high tolerance for discomfort.
If all goes according to plan, Elon Musk's Space Exploration Technologies will send two paying civilians around the moon and back some time next year.

"My advice to them would be to medicate early and often," says Richard Garriott de Cayeux, the video game developer and entrepreneur who paid $30 million to Russia's Space Adventures to spend 12 days aboard the International Space Station.
 His moon-voyaging counterparts have put down a "significant deposit," according to a post last week on SpaceX's website, but the total price and the identities of the tourists have not been disclosed.
The microgravity that permits what Garriott de Cayeux describes as "joyous, free-feeling" motion we associated with astronauts also takes a serious physiological toll.
"Body fluids stop flowing normally, which is why, in space, people's faces look puffy, and they generally have somewhat bloodshot eyes," he says. "It feels sort of like lying on a children's slide, head down. In the first days, you get very stuffed up and have a bit of a headache."
These symptoms can be easily remedied with common drugs, such as aspirin and Sudafed.

Another side effect comes from the floating fluid in your inner ear, which normally helps a person detect motion and stay balanced. In space, of course, it also begins floating.
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"So if you move your head forward, it will slosh to the back and make you feel like you're falling backwards," says Garriott de Cayeux. "There's a disagreement between what you see that you're doing and what your body thinks it's doing-and that often causes sea sickness."
That perceptual disconnect tends to last for about three days before your brain begins compensating. When you get back to Earth it takes another three days to readjust. This is another downside of space tourism that can be treated with drugs.  READ MORE.....

Wednesday 22 February 2017

Dr. Whidden Fairfax VA | How Bioterrorism is an Emerging Threat to Global Health


Dr. Whidden Fairfax VA is a retired colonel from US Army and known for his outstanding support and services. He gained great recognition for his exceptional services and has obtained highest level of degree in national security affairs. He has proven success in science and biodefense program administration. Dr. Whidden Fairfax VA completed his M.D in 1996. He served in the US Army Special Forces and dedicatedly served the nation.
Here Dr. Whidden is describing that what is bioterrorism and how it is a threat to the health of people at global level.

BIOTERRORISM:
As the name involves terrorism, that makes it clear, the concept is all related to war and attack. Bioterrorism is a form of terrorism where there is a release of biological agents intentionally, says Dr. Whidden Fairfax VA. He further adds that in bioterrorism the agents that are being used involves bacteria, viruses and other germs. In simpler terms we can call it a germ warfare.

United States government describes terrorism as an unlawful use of force and violence against a person or property and the term “terrorism” does not imply what weapon is being used. Using weapons to harm someone is not only a part of terrorism rather harming someone through any form is counted under terrorism.  Through traditional weapons terrorist can kill people using weapons, chemical agents and nuclear bombs but in bioterrorism, by using biological agents terrorist can easily destroy the whole community of living organism, be it animals or plants.These diseases are contagious and their effects can be seen in the future also. Goal of a terrorist is to target the civilians so that their government feel helpless to protect them.
Biological agents are found in nature that are harmful but many a times they are modified by the terrorists to make it more dangerous and use it to harm people globally.
Agents used for bioterrorism:
We have already discussed about bioterrorism, what it is and how terrorists are using it against their competitor nations and enemies.  What are the biological agents that can be used to create weapons in bioterrorism? While germs, bacteria, and viruses can be used by the terrorists but there are many other agents in nature that are being used in bioterrorism.
Reason behind using these agents by the terrorists is the availability and ease of spreading the agents.  It is impossible to know and memorize about each biological agent but it is important for the general public to understand the risk of bioterrorism and suitable response to these attacks.
How bioterrorism is the biggest threat:
Undoubtedly bioterrorism is the biggest threat to nations. It has been never so real at the age of advanced weaponry. It has been ignored and denied but it poses a bigger threat not only to the security of the nation but also to the health of the citizens of the particular nation. We all hear about the new and infectious diseases. These diseases are used as  bioweapons by many nations against the other nation.  Due to advancement in the science and technology there is more scope of using these agents by the terrorists.
To minimize the effect of the biological weapons, a country needs to be much sufficient and developed, says Dr. Whidden Fairfax VA. According to him, it is essential to reduce the effect of the adverse health effects and prevent fatalities.
Why the threat of bioterrorism is increasing rapidly? It is due to the expansion of the biotechnology industry globally and growth of these terrorists who are using this technology as weapons and showing interest in bioterrorism. Public health is the main concept in front of any nation. It is the first priority of any nation to provide best health facilities to its residents. Terrorists know it very well that by targeting this they can target the whole system of a country. Thereby, Bioterrorism is one of the biggest threat nowadays. This will affect all the resources a country have, its resources, money would spend on treating the epidemics. It is the worst situation for any nation to see its countrymen suffering from any of the epidemics says Dr. Whidden Fairfax VA.
Best way to respond to this emerging threat:
Dr. Whidden Fairfax VA. says that best way to respond to this threat is the “Preparedness”. He adds, preparedness can be in form of education, awareness, trainings, seminars and many more. This attack does not show one time result rather it weakens the roots of the nation and its effects could be seen in future also.  We know every nation has its strong hold on biotechnology and manufacturing advanced weapons, so one should be prepared with the solution. To fight with such attacks a country needs to be fully prepared with the plan, ensuring good communication system with public, hospitals and law enforcement agencies. By providing better facilities and maintaining peace among the public a nation can recover fast.
It is said that science and technology is the backbone of any nation, so a country should invest excellently in the area and provide opportunities to young generation to make their nation safe from such attacks.

Tuesday 21 February 2017

Dr. Whidden Fairfax VA | Space Startups Are Booming in the Mojave Desert

Inside a series of nondescript buildings in the ­driest desert in North America, an entrepreneurial enclave is chasing the next frontier of commerce. Explosions are routine. The science is complex. Brain power and ambition are high, as is danger. This cluster of 17 young companies at the Mojave Air and Space Port, 90 miles northeast of Los Angeles, is shooting for the moon—and beyond.
The startups there are building the components, engines, materials, and rockets that are dispatching a new generation of cell-phone-size satellites and more into space. These so-called NewSpace companies have sprung up around a former military base in the California desert. The remoteness of Mojave and the permissive attitude toward, say, detonation and flames—the airport’s slogan: We eat explosions for breakfast—make it the ideal location for companies aiming to reach the heavens.
“Mojave is the Silicon Valley of space exploration,” says Mark Bünger, who follows the sector at Lux Research. Mojave isn’t alone, as galactic entrepreneurship is also burgeoning in Seattle, Tucson, and Silicon Valley itself. Says Sunil Nagaraj of Bessemer Ventures: “2017 will be the year that NewSpace startups will hit their stride.”
It used to be that space projects were so daunting and expensive that only governments and their massive corporate partners could take them on. Then, in the past decade or so, a cadre of ­billionaires—think Elon Musk, Jeff Bezos, and Richard Branson—entered the arena with what first seemed like eccentric pet projects. Today, in the wake of their successes, there’s a third generation: minnows that service those private companies and leverage the growing economies of scale such that a startup without extraordinary resources can now contemplate a voyage to another planet.
 Plenty of factors are making space missions cheaper and more feasible: the miniaturization of electronics, the development of stronger and lighter materials, better engineering, and new standards that make it easier to build mini-satellites and send them up as hitchhikers on a larger launch. A traditional low-earth-orbit satellite, for instance, weighs three tons, stands two-stories tall, and costs tens of millions of dollars to build. Today there are “microsatellites” between 22 and 220 pounds and even “nanosatellites” under 22 pounds. A so-called cubesat, for example, weighs around two pounds, is about the size of a fist, and costs less than $100,000 to build. Some 60 companies now sell them, allowing small governments and companies to put a tiny probe into orbit for precision agriculture, oil spill monitoring, or security systems.
Of the 115 space-related companies started in the past decade and backed by investors, 84 focus on satellites, according to the Tauri Group, which tracks space investments. Just last year, those companies launched 100 microsatellites, up from 25 in 2011. Tauri projects that 2,400 nano- and micro­satellites will launch between 2017 and 2023.
Investment is starting to take off. Venture capitalists have put $8.2 billion into space companies over the past five years, according to Tauri, most of it into rockets and satellites.
Mojave has become an oasis of billionaires, scientists, vendors, and service providers. Branson’s Virgin Galactic has 500 people there building and testing propulsion systems and a suborbital spaceship, according to CEO George Whitesides. Paul Allen’s Vulcan Aerospace is nearing completion of its massive Stratolaunch airplane. NASA officials scout Mojave for technology and commercial space partners, and rockets are launched by small companies like XCOR and Masten Space Systems, which are assembling light, reusable launch vehicles to drastically reduce the cost of spaceflight. All that activity has drawn even smaller operations, including a school for test pilots and tiny vendors that provide everything from industrial coatings to ancillary offerings like financial services and a gym.
The biggest driver has been the deep pockets and confidence of Musk, Bezos, and others, including dotcom entrepreneur Naveen Jain and hotel mogul Robert Bigelow, who have been funding startups through venture investments and contests like the Google XPrize. Musk’s SpaceX slashed tens of millions of dollars from rocket prices, helping land the company a $1.6 billion deal with NASA to fly 12 cargo missions to the International Space Station. Musk and Bezos are now, separately, planning missions to Mars. “They were the primer to the pump for this new resurgence,” says Jay Gibson, CEO of XCOR.
Moon Express, funded by Jain, plans its maiden voyage to the moon later this year, vying for Google’s Lunar XPrize, a $20 million award to the first company to land a robotic spacecraft on the moon and accomplish several technical challenges. Once there, Moon Express plans to extract iron ore, water, minerals, and precious metals, as well as nitrogen, hydrogen, and more. Ultimately, Jain thinks, the moon could become a fuel depot where spacecraft can stop before continuing longer journeys. “Entrepreneurs have the potential to change the trajectory of how humanity lives,” he says, “where the moon becomes the eighth continent and a great place to live.”
Needless to say, the challenges remain immense. “I sound like a curmudgeon, but people always say this will be the year,” says Gary Hudson, an industry veteran and the president of the Space Studies Institute. “Everything costs more and takes longer than you think, and people die if you screw up.”
The difficulty hasn’t curbed enthusiasm at Interorbital Systems, a 12-person operation in Mojave. Cofounders Roderick and Randa Milliron started their business two decades ago with a goal of eventually living on the moon. Interorbital sells satellite kits and says it will launch 137 satellites this year with its modular rocket, whose size can be adjusted depending on the mission. The revenue from satellite and launch sales, space-testing missions, and more should help it reach its goal of using its rocket to get to the moon this year, as part of a team competing for the Lunar XPrize.
Perhaps the ultimate evidence that space technology is catching on is that it is even filtering down to hobbyists. A hacker space called Mojave Makers allows individuals to, say, build their own 3D-­printed rocket motors. Says Bessemer’s Nagaraj: “You now have people tinkering with space just as the previous generation tinkered with computers.” 

Wednesday 15 February 2017

Dr. Whidden Fairfax VA | Why can't we fly a plane into space ?


Why can’t we fly a plane in to space, what stops it from just flying higher and higher until we are in space?

Well, there a several issues but assuming we are in something like a normal jet airliner, then one of the main problems is the air, or lack of it as we get closer to space.
A plane flies because as it is propelled forward, the wings, which are shaped to make the air flow faster over the top of them than the bottom, generate lift. As the plane goes faster the wings creates more lift and when the lift is greater than the weight of the plane, it will climb up in to the air.
For our plane to continue to climb it needs more speed to increase the lift. If you throttle back on the speed a bit, the plane will settle in to level flight and if you decrease the speed the plane will start to fall as lift from the wings is not enough to overcome the weight of the plane.
As our plane climbs higher and higher in to the atmosphere, the air becomes less and less dense, so the plane has to fly faster to create more lift until eventually it reaches an altitude where the engines cease to function correctly because of the lack of oxygen or the air is too thin to create enough lift.
Now, This is a greatly simplified way of looking at this because as you approach the speed of sound or Mach 1, which also changes with altitude and if your plane has quite straight wings, the airflow over the wing can become unstable and it loses li ft. This unstable airflow can also shake the control surfaces, that’s the flaps on the wings that go up and down, so violently it could break them and you then lose control of the plane. That’s why supersonic or hypersonic planes have highly swept back and often delta shaped wings like Concorde and the space shuttle.


Just as we need air to breath, so the engines need oxygen to burn the fuel to create thrust to propel the plane forward.
Jet Engine however can work at higher altitudes than people. We humans have a limit of about 8000 meters or around 26,000 feet, above this is what climbers call the “death zone” where there is not oxygen for humans to survive for sustained periods.
The summit of Mount Everest is 29,000 feet high and the air density there is about 33% of that at sea level. This means that with each breath you take, you are getting only 33% of the oxygen. If you were to stay at this altitude without additional oxygen you would suffer a condition called “Hypoxia” where due to the lack of oxygen, the body to slowly shuts down and dies and is the cause of most the 200+ deaths that have occurred on Mount Everest.
At 12,000 meters or around 40,000 feet, which is the upper limit of most modern airliners, the air density is about 18% of that at sea level. If you were in a plane that had a rapid decompression at 40,000 feet, you would have about 5-10 seconds to get your emergency oxygen mask on before you became unconscious.
Concorde flew at 60,000 feet or 18,300 meters and where the air density is just 7% of that at sea level. To achieve this height, it had to travel at Mach 2, twice the speed of sound or 1350 mph.
The highest-flying jet plane in level flight was the Lockheed SR-71 Blackbird with a height of 85,069 or 25,929 meters and where the air density is just 2% of that at sea level. At that height, it’s travelling at around Mach 3.2, or 2190 mph.
The SR-71 pilots had to wear a full pressure suit with its own oxygen supply in case of a cockpit depressurization or emergency ejection. This put to the test, when in 1966 an SR-71 piloted by Bill Weaver disintegrated at Mach 3.1 at an altitude of 78,000 feet, as it was performing a test flight to optimise it’s performance.
At that altitude, your blood will boil in a similar way to when you open a bottle of fizzy drink as the nitrogen in your blood turns to gas in the low-pressure atmosphere. The pressure suit worked and Weaver survived the decent from 78,000 feet but tragically the navigator, Jim Zwayer, died of a broken neck as a result the breakup of the plane.

Now while you would think that the SR-71 is fast, to get in to space you need to reach what is known as “escape velocity”. This is where you are travelling faster than gravity is pulling you back to earth and that speed is 25,020 mph or 40,270 kmph and If that wasn’t a problem then there is also the recognised altitude of where space starts which is 328,000 feet or 100,000 meters, well over 3 times the highest flight of the SR-71.

Normal jet engines like those in the SR-71, have a maximum air speed limit of about Mach 3.5 or 2685mph. Beyond that the air pressure and temperature becomes too high for the compressors in the engine to work effectively.
For hypersonic speeds, experimental unmanned aircraft like the NASA X-43 use a SCRAMJET engine.