Archimedes’ finding that the crown was of gold was a discovery; but he invented the method of determining the density of solids. Indeed discoverers must generally be inventors; though inventors are not necessarily discoverers. - William Ramsay 1852 to 1916 Chemist
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
Irving Langmuir (1851–1957) USA – gas filled incandescent light bulb hydrogen welding.
Hermann Anschütz-Kaempfe (1872–1931) Germany – Gyrocompass.
Gregory Goodwin Pincus (1903–1967) together with Min Chueh Chang (1908–1991) USA/China – Combined oral contraceptive pill.
Richard J. Gatling (1818–1903) USA – wheat drill first successful machine gun.
Charles Thomson Rees Wilson (1869–1959) UK – Cloud chamber.
Joy Mangano USA – household appliances.
Marcel Kiepach (1894-1915) Croatia - dynamo maritime compass that indicates north regardless of the presence of iron or magnetic forces.
Igor Tamm (1895–1971) Russia – co-developer of tokamak.
Yury Lomonosov (1876–1952) Russia/United Kingdom – first successful mainline diesel locomotive.
Mark Publicover (born 1958) USA – First affordable trampoline safety net enclosure.
Mordecai Meirowitz (born c. 1925) Roumania / Israel – Mastermind (board game).
Igor Sikorsky (1889–1972) Russia/USA – first four-engine fixed-wing aircraft (Russky Vityaz) first airliner and purpose-designed bomber (Ilya Muromets) modern helicopter Sikorsky-series helicopters.
George de Bothezat (1882–1940) Russia/USA – quadrotor helicopter (The Flying Octopus).
Dmitri Mendeleev (1834–1907) Russia – Periodic table pycnometer pyrocollodion.
Hippolyte Mège-Mouriès (1817–1880) France – margarine.
Percy Spencer (1894–1970) USA – microwave oven.
Vladimir Simonov (born 1935) Russia – APS Underwater Assault Rifle SPP-1 underwater pistol.
Stanislav Brebera (1925–2012) Czech Republic – Semtex explosive.
Eduard Locher (1840–1910) Switzerland – Locher rack railway system.
Fritz Klatte (1880–1934) Germany – vinyl chloride forerunner to polyvinyl chloride.
A fact acquires its true and full value only through the idea which is developed from it. ~ Justus von Liebig - 1803 to 1873
The literary convention that numbers less than 10 should be given in words is often highly unsuitable in mathematics… The excessive use of the word forms is regrettably spreading at the present time. ~ J.E. Littlewood 1885 – 1977 - Mathematician
Surely it is not knowledge but learning; not owning but earning; not being there but getting there; that gives us the greatest pleasure. ~ Carl Friedrich Gauss 1777 – 1855 - Mathematician and Physicist
I am busy just now again on electro-magnetism and I think I may have got hold of a good thing. ~ Michael Faraday 1791 – 1867
An experiment is a question which science poses to Nature and a measurement is the recording of Nature’s answer. - Max Planck 1858 to 1947 Theoretical Physicist
Although Nature needs thousands or millions of years to create a new species man needs only a few dozen years to destroy one. - Victor Scheffer 1906 to 2011 Biologist
The invention of logarithms came to the world as a bolt from the blue. No previous work had led up to it… It stands isolated breaking in upon human thought abruptly without borrowing from the work of other intellects or following known lines of mathematical thought. ~ John Moulton 1844 – 1921 - Mathematician
- 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.