Not to sound... dismissive, but seriously? You are honestly questioning why a civilian aircraft can't be protected from attacks using weapons systems designed to take down military aircraft which have vastly more sophisticated defense systems and flight characteristics and typical flight patterns far more difficult… » 7/24/14 1:28pm 7/24/14 1:28pm

Ummm.... if by subtle white noise you mean 72+dB constant hum (approximately like standing next to a busy main road), then yes. Also, the aforementioned radiation flashing and constant inner ear freak out problems... Oh yeah, if you have long hair you think it tickles you strangely and bothers you on earth? Hope… » 6/05/14 12:08pm 6/05/14 12:08pm

This project is also very interesting because the basement excavation is extremely close to the Metro tunnels. Like, less 10 feet close. The developer paid for the installation of incredibly sophisticated survey equipment in the tunnels to ensure no disruptions to service occurred during excavation. The excavation… » 2/14/14 1:05pm 2/14/14 1:05pm

Soil liquefaction is one of my favorite subjects and it is an amazing phenomenon that can lead to some of the worst damage done in an earthquake. Liquefaction of soils occurs when soil is completely saturated with water and then the soil is disturbed. When the inter-particle spaces are compressed in one area by the… » 2/06/14 2:06pm 2/06/14 2:06pm

My wife works at JPL on thermoelectric chain-forming Zintl compounds. Thermoelectric devices are going to be a vital technology in the coming future as energy becomes more expensive and waste heat becomes an important source of energy. Have you ever worked on, or considered working on thermoelectrics? » 11/01/13 12:57pm 11/01/13 12:57pm

Alrighty guys, I'm a tunneling engineer and had to step in. The actual cost of 22' excavated tunnel on the west coast right now is $8,000 per foot. That is a for a hole in the ground with a concrete liner, no engineering, no trackwork, no station excavation or anything else, just we somehow magically started… » 10/09/13 5:47pm 10/09/13 5:47pm

The only thing that really pisses me off about this movie is it seems to make a mockery of the absolutely insane stoicism displayed by pilots/astronauts during emergencies. Remember the story a few months ago of the astronaut who almost drowned? These are people that have trained and trained and trained. They have… » 9/05/13 1:43pm 9/05/13 1:43pm

Skimmed the whole thing. The prices he is quoting of approximately $4-6 bil. is NOT including real estate acquisition. Which is a massive part of the CA HSR cost. I really don't think he understands just how expensive and difficult acquiring land is. Also, if you think that CalDOT will let you use their ROW you… » 8/12/13 4:57pm 8/12/13 4:57pm

I thought about writing a post about this whole Hyperloop thing because I am a tunnel engineer designing subway tunnels and also work with a lot of the people designing the CA High Speed Rail. Unfortunately, I'm not a very good writer so I guess I will just comment here. » 7/19/13 4:32pm 7/19/13 4:32pm