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" Science is about knowing; engineering is about doing. "
Henry Petroski
Engineering
Knowing
Doing
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" Failure is central to engineering. Every single calculation that an engineer makes is a failure calculation. Successful engineering is all about understanding how things break or fail. "
Henry Petroski
How
Understanding
Engineering
" Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. "
Albert Einstein
Science
Stupidity
Infinite
" I'm a firm believer that no matter how small an object is, you can find interesting things out about it and its history. "
Henry Petroski
Find
History
Interesting
" There's so much written about the Titanic, and it's hard to separate what's fact and what's fiction. My understanding is that the way the Titanic was designed, the emphasis was placed on surviving a head-on collision. "
Henry Petroski
Hard
Fact
Titanic
" Science and technology revolutionize our lives, but memory, tradition and myth frame our response. "
Arthur M. Schlesinger
Memory
Tradition
Technology
" Because every design must satisfy competing objectives, there necessarily has to be compromise among, if not the complete exclusion of, some of those objectives, in order to meet what are considered the more important of them. "
Henry Petroski
Important
Design
Compromise
" Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know it so it goes on flying anyway. "
Mary Kay Ash
Bee
Know
Goes
" Although engineers want always to make everything better, they cannot make anything perfect. This basic characteristic flaw of the products of the profession's practitioners is what drives change and makes achievement a process rather than simply a goal. "
Henry Petroski
Process
Perfect
Change
" Research is what I'm doing when I don't know what I'm doing. "
Wernher von Braun
Doing
Science
Research
" No amount of experimentation can ever prove me right; a single experiment can prove me wrong. "
Albert Einstein
Right
Single
Me
" As engineers, we were going to be in a position to change the world - not just study it. "
Henry Petroski
World
Change
Change The World
" I relax by looking at things and reading about things. Even the simplest thing can reveal a great deal about the world around us. It relaxes me greatly to sit back with my feet up and look around my study at the everyday things that surround me. "
Henry Petroski
World
Reading
Great
" No design, no matter how common or seemingly insignificant, is without its adamant critics as well as its ardent admirers. "
Henry Petroski
Critics
Well
Matter
" We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. "
Carl Sagan
Technology
Live
Society
" Success is a science; if you have the conditions, you get the result. "
Oscar Wilde
You
Success
Get
" The space shuttle was designed, at least in part, to broaden our knowledge of the universe. To scientists, the vehicle was a tool; to engineers, it was their creation. "
Henry Petroski
Knowledge
Universe
Space
" Indeed, an engineer designing a structure is not unlike an artist painting one. Both start with nothing but talent, experience, and inspiration. The fresh piece of paper on the drawing board is as blank as the newly stretched piece of canvas. "
Henry Petroski
Experience
Painting
Start
" It is really want, rather than need, that drives the process of technological evolution. "
Henry Petroski
Want
Need
Evolution
" My first book, 'To Engineer Is Human,' was prompted by nonengineer friends asking me why so many technological accidents and failures were occurring. If engineers knew what they were doing, why did bridges and buildings fall down? It was a question that I had often asked myself, and I had no easy answer. "
Henry Petroski
Bridges
Me
Fall
" For as long as I can remember, I have been fascinated by things large and small. I wanted to know what made my watch tick, my radio play, and my house stand. I wanted to know who invented the bottle cap and who designed the bridge. I guess from early on I wanted to be an engineer. "
Henry Petroski
Stand
Bridge
Long
" Science is a beautiful gift to humanity; we should not distort it. "
A. P. J. Abdul Kalam
Humanity
Gift
Beautiful
" Betting on the success of innovative technologies in the marketplace can carry all the uncertainty and risk that betting on the next card in the deck does at a blackjack table in Las Vegas. There is a factor of randomness that must be factored in, but precisely how to do so is anyone's guess. "
Henry Petroski
Uncertainty
Risk
Success
" Read and write with a sensitive ear. The craft of writing is very important. Practice the craft. "
Henry Petroski
Ear
Craft
Important
" The science of today is the technology of tomorrow. "
Edward Teller
Technology
Science
Today
" Engineering is achieving function while avoiding failure. "
Henry Petroski
Engineering
Achieving
Failure
" An over-reliance on past successes is a sure blueprint for future failures. "
Henry Petroski
Sure
Past
Future
" The definition of 'safe' is not strictly an engineering term; it's a societal term. Does it mean absolutely no loss of life? Does it mean absolutely no contamination with radiation? What exactly does 'safe' mean? "
Henry Petroski
Loss
Safe
Engineering
" I emphasize that virtually every engineering calculation is ultimately a failure calculation, because without a failure criterion against which to measure the calculated result, it is a meaningless number. "
Henry Petroski
Engineering
Failure
Measure
" Because they are so humbled by their creations, engineers are naturally conservative in their expectations of technology. They know that the perfect system is the stuff of science fiction, not of engineering fact, and so everything must be treated with respect. "
Henry Petroski
Respect
Technology
Science
" Many new technologies come with a promise to change the world, but the world refuses to cooperate. "
Henry Petroski
New
Change The World
Change