Is there life life on mars? For many people it is the big question and maybe we aren´t to far to find the answer...
Don´tforget, if you like the ppt; like it!
:)
Is there life life on mars? For many people it is the big question and maybe we aren´t to far to find the answer...
Don´tforget, if you like the ppt; like it!
:)
LivePerson Developers is proud to host a meetup about A/B testing by Shlomo Lahav, Chief Scientist at LivePerson.
The lecture will focus on testing and the ability to deduct conclusions, especially in the web.
- What is an A/B test?
- How to construct an A/B test properly?
- What are the metrics that can be used?
- Can the results be miss leading?
- Errors: bias and statistical errors
- First and second type errors
- Measuring lift, why lift is a biased measure.
- Is it possible to change the test settings during the test?
- How to run a multivariate testing effectively?
This article presents how planet Earth was born, how it operates and how it is protected from threats coming from outer space. In addition to showing how the Earth operates as a dynamic system, it shows how our planet will disappear completely when the Sun migrates out of Earth's orbit in about 1 billion years.
Human civilization has existed for a very short time on Earth. If we take the existence of Earth as equivalent to one year in time. Then human civilisation only appears on the last second of the last hour of the last day in the Earth’s year. Human has been fighting each other since the beginning of history. In the last century, we had two World Wars, when millions were killed. But I am the luck generation that miraculously never experienced wars, although the drums of wars are never too far away. We have arsenals of weapons that could destroy the world many times over. In my life time, I have also seen many of our children, marrying people of different races too. Our greatest enemy is ourselves. If we can survive this, there is the whole universe to explore. Finally, just remind ourselves that the longest Ice Age on Earth lasted for well over 1 billion years long and our civilisation is only 10,000 years old. 16 Jan 2022.
Might our earth undergo a runaway greenhouse warming similar to Venus?
Could there be life on the billions of exo-planets?
Why is the oxygen content of our earth’s atmosphere greater that of Venus and Mars, which are mostly CO2 ?
Origin of Earth, Big Bang theory, Nebular hypothesis, Internal heating of earth, formation of Earth's crust and inner structure, evolution of continents, oceans and atmosphere, continental drift theory, origin of life, Geological Time Scale.
2. Colonizing the Moon Has been discussed amongst astronauts for over 50 years Decided that we will colonize the Moon before Mars The Moon is 238,857 miles away, Mars is between 36 million to 250 million miles away Could get to Moon in 3 weeks going at 500 MPH on a jetliner, 6 months going to Mars
3. Apollo Missions Nine Apollo missions have been sent into space Seven missions hadmen land on the Moon The first two missions had to go back to Earth before landing First mission made 10 orbits around the Moon Second mission came within 50,000 feet of landing
4. LCROSS “Shooting the Moon” Lunar Crater Observation and Sensing Satellite (LCROSS) “shot the Moon” on October 9th, 2009 Sent a satellite into the Cabeus A crater in search of ice by the southern lunar pole Found the ice, which can be chemically reduced to oxygen
5. Spacesuits Help to regulate temperature and oxygen Will help to slow muscle atrophy and bone decalcification Takes 500 man-hours (2 ½ years) for one person with all the skills to make one space suit 3 months with many other people All spacesuits are 3/16” thick, and made of 11 materials The materials are: ortho-fabric,aluminized mylar, neoprene-coated nylon, dacron, urethane-coated nylon, tricot, nylon/spandex, stainlesssteel, and high strength composite materials.
6. Spacesuits (cont.) All spacesuits are taken apart after each mission, then reassembled for the next mission with different parts Apollo spacesuits weighed 180 pounds (30 lbs on Moon) Current spacesuits weigh 310 pounds (103.3 lbs on Moon) Spacesuits are only white because they reflect the sun’s light and heat
7. When we might colonize Within the next 40-70 years No definite plans where on the Moon to colonize Would cost $10-20 billion per year to sustain the colony
8. Pros of Colonizing Good vacation spot Great space observation location Rest stop for astronauts, place to refill rocket fuel Telephone‘s could be used on the Moon, with only a 3 second delay
9. Cons of Colonizing No fertile soil for crops Lunar soil is extremely abrasive and toxic, and causes serious lung conditions Hospitals would have difficulty functioning on the Moon
10. Health Risks Still developing children and young adults’ spines and digestive systems would grow to abnormal lengths Children would die before having offspring, results in end of human race Very poor blood circulation
11. Marius Hill Enough oxygen to sustain a colony 213 feet wide, 269 feet deep Volcanic crater in the Marius region Could lead to a breakthrough and help us find other craters nearby with oxygen
12. Evolution to New Species Evolution is constantly occurring In space, humans would evolve into a completely new species Won’t be a need for spacesuits anymore
13. Thank You for Watching To me, colonizing the Moon is an expensive and risky task that may cause more harm than good to the human race in the long-run. I hope you enjoyed my presentation