Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 Internet speed test! ×

Comment Carrier comparison (Score 2) 206

Many who comment here will have a reason that they chose one carrier over one other carrier. They may have switched carriers. I always found that the latest carrier plan was better than the competition, and that it would go back and forth or be too confusing to come up with one clear answer. I actually have iPhones and aPhones on 5 carriers. I also travel the world quite a bit. Domestically, all the carriers are good for most unless you live in an area not covered by some. I remember times when Verizon was faster but now it seems that AT&T is faster for me, most of the time. I remember when you could buy international data from Verizon that covered 200 countries, while the AT&T list was only about 50 countries. That affected me in places like Russia and South Africa, back then. T-Mobile has incredible data plans for here and away but they don't seem as fast as claimed unless I'm in the store. Sprint has gone far out of their way to help me with issues, including a stolen phone number. Right now I believe that the best carrier I have, for my own needs, is Google Project Fi because the plan works in over 100 countries. You can even order a free data-only SIM for free, without even a shipping charge, to use it on iPads and the like. I would never say that anyone's choice of plan is bad in any way though.

Comment Re:No. (Score 5, Informative) 198

A whole interview rarely carries over. I was asked if I thought Apple would be around in 100 years. My reply even referred to IBM, along the lines of what you can do and how many restarts you can get when you are that big. I facetiously jabbed at the idea of Trump seeking advice from today's huge internet companies by telling the reporter that they would all ask for lower taxes and become larger yet.

Comment Re:Well... (Score 1) 44

RP-1/HTP works fine. The British Black Knight had over 20 successful (suborbital) launches with it, and the later Black Arrow, whose first two stages were RP-1/HTP, put the UK's only independently-launched satellite into orbit, back in 1971.

Given the number of first-rocket attempts which have failed (sometimes explosively) because of things like frozen LOX valves, going non-cryogenic has a certain appeal. Especially since they can pretty much stockpile the things in a fueled state for rapid launch.

Any rocket fuel is likely to kill you if you look at them funny. Some more so than others, sure, but nobody is using liquid ozone or FLOX (liquid fluorine-oxygen) as an oxidizer any more either. (Or worse. See the book "Ignition!" for a fun look at early rocket fuel experiments.)

And for what it's worth, the mass ratio of an aluminum beer can (12 fl oz size) is a hair under 28:1. ;-)

Comment Re:Revolutionary Rocket aka aerospike engine (Score 3, Informative) 44

You're confusing aero spike engines with simpler (but heavier) spike engines.

In an aerospike, aerodynamic forces (often with the assist of gasses injected at the base of the engine) form the "pointy" part of the spike, so there's both the lighter and easier to cool aspect. Also known as a plug-nozzle, but the latter are usually (a) circular and (b) even shallower than this linear aerospike.

Spike nozzles (circular ones) have also been flight tested, but yeah, the tail of that spike is heavy -- and also not what you want if you're planning to reuse the vehicle, because it aggravates reentry heating. (Doesn't look like this is what ARCA is planning though, I guess they're just going for cheap and disposable. Maybe reusable will follow.)

NASA never had any problems with their X-33 aerospike, it was all down to the weird-ass V-shape fuel tank configuration.

Comment Re:Too good to be true. (Score 1) 203

True, but these guys are in Colorado. We get maybe a dozen cloudy or hazy days a year. And it's a semi-desert, no muggy days.

Yeah, it might not work so well in the Mississippi valley region.

OTOH, if they're shifting to a frequency of infrared not absorbed by H2O, it might not care about puny water vapour.

Comment Re:Tell us, Einstein, what is Rust written in? (Score 3, Insightful) 236

Uh, nope.

From WIkipedia:

The language grew out of a personal project by Mozilla employee Graydon Hoare, who stated that the project was possibly named after the rust family of fungi.[11] Mozilla began sponsoring the project in 2009[10] and announced it in 2010.[12] The same year, work shifted from the initial compiler (written in OCaml) to the self-hosting compiler written in Rust.[13] Known as rustc, it successfully compiled itself in 2011.[14] rustc uses LLVM as its back end.

(emphasis added)

However, I'll grant that LLVM is written in C++.

Slashdot Top Deals

No amount of genius can overcome a preoccupation with detail.

Working...