Suppose we have an unknown number of objects. When counted in threes 2 are left over when counted in fives 3 are left over and when counted in sevens 2 are left over. How many objects are there? ~ Sunzi The Mathematical Classic of Sunzi - Chinese mathematics problem from c. 450 AD
What is possible in the Cavendish Laboratory may not be too difficult in the sun. - Sir Arthur Eddington 1882 to 1944 Astronomer Physicist Mathematician
George de Bothezat (1882–1940) Russia/USA – quadrotor helicopter (The Flying Octopus).
Jean-François Pilâtre de Rozier (1754–1785) France – Rozière balloon.
Heinrich Göbel (1818–1893) Germany – incandescent lamp.
Paul Winchell (1922–2005) USA – the artificial heart.
Richard James Burgess (born 1949) UK – Simmons (electronic drum company) co-inventor of SDS5 drum synthesizer.
Nick Sheridon (1928–1962) USA – Electronic paper.
Herman Frasch (1851–1914) Germany / USA – Frasch process (petrochemistry) Paraffin wax purification.
Boris Mamyrin (1919–2007) Russia – reflectron (ion mirror).
Franc Trkman (1903–1978) Slovenia – electrical switches accessories for opening windows.
Josephine Cochrane (1839–1913) USA – dishwasher.
Franz San Galli (1824–1908) Poland/Russia (Italian and German descent) – radiator modern central heating.
Paul Berg (born 1926) USA – created the first Recombinant DNA molecules.
James Leonard Plimpton (1828–1911) USA – roller skates.
Theodor Svedberg (1884–1971) Sweden – Analytical ultracentrifuge.
Albert Hofmann (1906–2008) Switzerland – LSD.
Nils Gustaf Dalén (1869–1937) Sweden – AGA cooker Dalén light Agamassan Sun valve for lighthouses and buoys.
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).
Sir William Siemens (1823–1883) Germany – regenerative furnace.
Ronald Price Hickman (1932–2011) USA - designed the original Lotus Elan the Lotus Elan +2 and the Lotus Europa as well as the Black & Decker Workmate.
Leland Clark (1918–2005) USA – Clark electrode (medicine).
Progress is made by trial and failure; the failures are generally a hundred times more numerous than the successes ; yet they are usually left unchronicled. - William Ramsay 1852 to 1916 Chemist
Geometry inasmuch as it is concerned with real space is no longer considered a part of pure mathematics; like mechanics and physics it belongs among the applications of mathematics. ~ Hermann Weyl 1885 to 1955 - Mathematician and Theoretical Physicist
The chief philosophical value of physics is that it gives the mind something distinct to lay hold of which if you don’t Nature at once tells you you are wrong. ~ James Clerk Maxwell 1831 to 1879
Time is the best appraiser of scientific work and I am aware that an industrial discovery rarely produces all its fruit in the hands of its first inventor. ~ Louis Pasteur - 1822 to 1895
Our thoughts visions and fantasies have a physical reality. A thought is made of hundreds of electrochemical impulses. ~ Carl Sagan 1934 to 1996 Astrobiologist Planetary Scientist
Chemists do not usually stutter. It would be very awkward if they did seeing that they have at times to get out such words as methylethylamylophenylium. ~ Sir William Crookes - 1832 to 1919
There may be babblers wholly ignorant of mathematics who dare to condemn my hypothesis upon the authority of some part of the Bible twisted to suit their purpose. I value them not and scorn their unfounded judgment. ~ Nicolaus Copernicus 1473 – 1543 Mathematician and Astronomer
- 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.