In practical applications we are concerned only with comparatively small numbers; only stellar astronomy and atomic physics deal with ‘large’ numbers and they have very little more practical importance as yet than the most abstract pure mathematics. ~ G. H. Hardy 1877 – 1947 - Mathematician
Nothing can be more certain than this: that we are just beginning to learn something of the wonders of the world on which we live and move and have our being. ~ William Ramsay - 1852 to 1916
Artem Mikoyan (1905–1970) Armenia/Russia – MiG-series fighter aircraft including world's most produced jet aircraft MiG-15 and most produced supersonic aircraft MiG-21 (together with Mikhail Gurevich).
Alfred William Gallagher (1911–1990) New Zealand – Electric fence for farmers.
John Vincent Atanasoff (1903–1995) Bulgaria/USA – modern digital computer.
Charles Fabry (1867–1945) together with Alfred Perot (1863–1925) France – Fabry–Pérot interferometer (physics).
George de Hevesy (1885–1966) Hungary – radioactive tracer.
Jean Bernard Léon Foucault (1819–1868) France – Foucault pendulum gyroscope eddy current.
William Snow Harris (1791–1867) United Kingdom – much improved naval Lightning rods.
Archimedes (c. 287–212 BC) Greece – Archimedes' screw.
Ida Rosenthal (1886–1973) Belarus/Russia/United States – modern bra (Maidenform) the standard of cup sizes nursing bra full-figured bra the first seamed uplift bra (all with her husband William).
Jozef Karol Hell (1713–1789) Slovakia – the water pillar.
Joy Mangano USA – household appliances.
Norman Gaylord (1923–2007) USA – rigid gas-permeable contact lens.
Ivan Polzunov (1728–1766) Russia – first two-cylinder steam engine.
Stanislav Brebera (1925–2012) Czech Republic – Semtex explosive.
Gustav Guanella (1909–1982) Switzerland – DSSS Guanella-Balun.
Alexandre Alexeieff (1901–1982) Russia/France – pinscreen animation (with his wife Claire Parker).
Nikola Tesla (1856–1943) Croatia/Serbia – induction motor high-voltage / high-frequency power experiments the transmission of electrical power.
John Hadley (1682–1744) UK – Octant.
Henri Marie Coandă (1886–1972) Romania – Coandă effect of fluid dynamics Coandă-1910 world's first jet.
Gregory Goodwin Pincus (1903–1967) together with Min Chueh Chang (1908–1991) USA/China – Combined oral contraceptive pill.
In reality a theory in natural science cannot be without experimental foundations; physics in particular comes from experimental work. ~ Samuel C. C. Ting b. 1936
A physicist is an atom’s way of knowing about atoms. - George Wald 1906 to 1997 Neurobiologist
Trial by combat of wits in disputations has no attraction for the seeker after truth; to him the appeal to experiment is the last and only test of the merit of an opinion conjecture or hypotheses. ~ Joseph Mellor - 1869 to 1938
I believe that thirty million of these animalcules together would not take up as much room or be as big as a coarse grain of sand. ~ Antonie van Leeuwenhoek 1632 to 1723 - Biologist
No two electrons in the same state? That is why atoms are so unnecessarily big and why metal and stone are so bulky. (Explaining that atoms are as large as they are because of Wolfgang Pauli’s Principle.) ~ Paul Ehrenfest 1880 – 1933
In its efforts to learn as much as possible about nature modern physics has found that certain things can never be “known” with certainty. Much of our knowledge must always remain uncertain. The most we can know is in terms of probabilities. ~ Richard Feynman 1918 to 1988
The finding of the double helix thus brought us not only joy but great relief. It was unbelievably interesting and immediately allowed us to make a serious proposal for the mechanism of gene duplication. ~ James Watson 1928 – Present - Geneticist
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- On demand access - access 720p HD live video at any time from your smartphone or the web, with built-in night vision.
- Personalized voice message - a recorded message will play when you can't answer the door.If the lights are solid blue, please type + , choose Wireless Device instead of Zink to find the doorbell.
- Answer the door wherever you are - see and speak to visitors directly from your smartphone.If all the lights are flashing green, please check your smartphone and make sure it is connected to a 2.4Ghz wifi network. If your router is a dual band router, meaning it supports both 5.0Ghz and 2.4Ghz networks, be sure the SSID (network name) is different for each. You will need your mobile device to be connected to the 2.4Ghz during setup. Passwords and SSID names must be a minimum of 6 characters.
- Smart motion detection - receive an alert and a recorded video clip whenever motion is detected.
- Easy setup - use existing wiring for quick installation and connect to WiFi using the free Zmodo app. Use Beam to easily set up Greet. With Beam Connect, setup is as simple as telling the app how many devices are powered on and ready to pair. If your router supports AC, you will need to disable that during the setup. In your router, you may need to take it out of mixed mode, or put it into legacy mode.
- See, hear and speak to anyone at your door from your smartphone, tablet or PC.
- Get instant alerts when visitors press your Doorbell or trigger the built-in motion sensors.
- Watch over your home in crystal-clear HD video.
- Protect your home - day or night - with infrared night vision.
- Communicate with visitors via two-way audio with noise cancellation.
- WIFI signal,the whole network interconnection. Remote calling, intercom, and unlock. Using most popular touch key technology, advanced and high Sensitivity, greatly extend the key life. Clear camera, and equipped with automatic light sensitive chip. If the light is not enough, it will use the IR night vision function to monitor and capture HD video and pictures.
- Motion detection function. You can open or close this function according to different working environments. Capture and video mode for choosing. Powered by DC 5V, more safe.
- Simple app operation in mobile phone, easy installation. support anrdoid and ios app APP download address remind: please search " door phone" for apple store(for ios app) and for google player(for android app).
- High-strength tempered glass surface, luxury, anti-resistant and scratches, has longer working life. With rain cover and touch key surface, better waterproof function.
- Easy to install. You can fix it with screws, or paste with double-sided tape. One door phone can be connected to several mobile phone, PC, or computers. Optional indoor dingdong doorbells to match. While calling to the mobile phone, the indoor doorbell will ring too.