“The Earth is the cradle of humanity, but one cannot live in the cradle forever.” – Konstantin Tsiolkovsky In 1903, Tsiolkovsky wrote an article called, “Exploration of outer space by means of rocket devices,” in The Science Review. Born in September 1857 in the village of Izhevskoye, Russia, Tsiolkovsky was the fifth child in a …
Category Archives: Quotes
Words and Virginia Woolf
Finally, and most emphatically, words, like ourselves, in order to live at their ease, need privacy. Undoubtedly they like us to think, and they like us to feel, before we use them; but they also like us to pause; to become unconscious. Our unconsciousness is their privacy; our darkness is their light… That pause was …
Kelly Johnson on X-Plane Programs
Our present research airplanes have developed startling performance only by the use of rocket engines and flying essentially in a vacuum. Testing airplanes designed for transonic flight speeds at Mach numbers between 2 and 3 has proven, mainly, the bravery of the test pilots and the fact that where there is no drag, the rocket …
Deming and Statistics
In God we trust. All others must bring data. — W. Edwards Deming Deming revolutionized quality management with his emphasis on data-driven decision-making. His 1950s lectures on Statistical Product Quality Administration in Japan were instrumental in Japan’s post-war economic growth, helping it become the world’s second-largest economy. Deming was awarded the National Medal of Technology …
Madame Rousseau on d’Alembert
You will never be anything but a philosopher – and what is that but an ass who plagues himself all his life, that he may be talked about after he is dead. ~ Madame Rousseau on d’Alembert
Gödel and Time
$\mathrm{LL}$ cosmological solutions with non-vanishing density of matter known at present ${ }^1$ have the common property that, in a certain sense, they contain an “absolute” time coordinate, ${ }^2$ owing to the fact that there exists a one-parametric system of three-spaces everywhere orthogonal on the world lines of matter. It is easily seen that …
Adhémar Barré de Saint-Venant on Flow
If the velocities [of water in rivers] remained constant in each point of the traversed space, the surface of the liquid would look like a plate of ice and the herbs growing at the bottom would be equally motionless. Far from that, the stream presents incessant agitation and tumultuous, disordered movements, so that the velocities …
Helmholtz on Navier
As far as I can see, there is today no reason not to regard the hydrodynamic equations (of Navier and Stokes) as the exact expression of the laws that rule the motions of real fluids. 1873. Hermann Helmholtz
Daniel Bernoulli on Jean le Rond d’Alembert
I have seen with astonishment that apart from a few little things there is nothing to be seen in his hydrodynamics but an impertinent conceit. His criticisms are puerile indeed, and show not only that he is no remarkable man, but also that he never will be. Daniel Bernoulli on Jean le Rond d’Alembert
Backus on IBM / Fortran
Much of my work has come from being lazy. I didn’t like writing programs, and so, when I was working on the IBM 701, writing programs for computing missile trajectories, I started work on a programming system to make it easier to write programs. John Backus, 1979, Interview IBM Think Magazine