PCB software comparison

Old Jetpacks

Bell Rocket Belt - status: development canceled
patentimages.storage.googleapis.com/e2/e7/86/083aa4109dcd52/US3021095.pdf
1962 by Wendell Moore

Fuel - hydrogen peroxide
Flight time - 20 sec

It works by sending the pressurized fuel through a decomposition catalyst—in this case a series of fine-meshed screens made of silver. The peroxide instantly expands into superheated steam, producing a few hundred pounds of thrust at the exhaust nozzles. These are controlled by the pilot’s hand grips. There’s no aerodynamic lift; the thing stays aloft through the physics of brute force. It has the glide angle of an Acme anvil.

JB10 - status: retrofitted as new JB11 (see Fig. 35)
patentimages.storage.googleapis.com/c2/cc/4f/e885bd78655c95/US20170015419A1.pdf#page=28
2017 by David Mayman and Nelson Tyler

Fuel - kerosene or diesel
Flight time ~ 7 min

EE and Hobby Electronics Blogs

circuitcellar.com ($25/yr as student)
> read.uberflip.com/i/238541-cc-2013-11-issue-280 


Nuts & Volts Magazine


epemag3.com ($29/yr) 

How to Study for the Sciences

BEFORE CLASS
 Skim what’s coming up in the textbook, so it’s not all totally unfamiliar and you have some idea of what’s coming.
 Skim the previous day’s notes, so you can relate each lecture to what came before.

Briefly look over titles, introductions, subheadings, first few sentences beneath subheadings, figures, diagrams, italicized or boldfaced words and terms, and summaries. As you preview, ask yourself:
§ What is this about?
§ What do I know about this ... and don't know or don't remember?
§ Where does the author begin and where is he going?
§ What is the organizational pattern (relationships, chronological, topics?)
§ How does this fit into what we are learning in this course?
§ How difficult or how easy is this?
§ Is there terminology that is unfamiliar or that I will need to review?
§ How important is this information? Are there parts I could skim and get the main ideas?
§ Where can I make logical breaks in the reading to divide up my study time?
§ In what order might I read the information in the chapter? Would it be easier and more motivating to read the most interesting section first? 

READING THE TEXTBOOK
 Do not “just read” without thinking about what you are reading – that’s “pretend studying”
 Study your textbook along with your notes – do they agree with each other? Do you understand the flow of the story? At the very least, annotate your notes with helpful ideas from the textbook

AFTER THE EXAM
 How could you study differently next time to improve your score? 

http://www.howtostudy.org/resources_subject.php?id=24

Cool Motorcycle Helmet Brake

indiegogo.com/projects/brakefree-the-smart-brake-light-for-motorcyclists-motorcycle#/

Civil Engineering Articles

Why Roman concrete still stands strong while modern version decays

IEEE

ieee.org/proceedings   or   proceedingsoftheieee.ieee.org