The black holes of nature are the most perfect macroscopic objects there are in the universe: the only elements in their construction are our concepts of space and time. - Subrahmanyan Chandrasekhar 1910 to 1995 Astrophysicist
It is strange that only extraordinary men make the discoveries which later appear so easy and simple. - Georg C. Lichtenberg 1742 to 1799 Physicist
Jacques E. Brandenberger (1872–1954) Switzerland – Cellophane.
Alfred P. Southwick (1826 – 1898) USA - Electric chair.
Willard Boyle (1924–2011) together with George E. Smith (1930–) USA – Charge-coupled device (CCD).
Nestor Makhno (1888–1934) Ukraine/Russia – tachanka.
Mikhail Mil (1909–1970) Russia – Mi-series helicopter aircraft including Mil Mi-8 (the world's most-produced helicopter) and Mil Mi-12 (the world's largest helicopter).
Motorins Ivan Feodorovich (1660s–1735) and his son Mikhail Ivanovich (?–1750) Russia – Tsar Bell.
Vladimir Petlyakov (1891–1942) Russia – heavy bomber.
Antonio Benedetto Carpano (1764–1815) Italy – modern vermouth.
Émile Baudot (1845-1903) France - Baudot code.
Robert Koch (1843–1910) Germany – method for culturing bacteria on solid media.
Adolphe Kégresse (1879–1943) France/Russia – Kégresse track (first half-track and first off-road vehicle with continuous track) dual clutch transmission.
John Moses Browning (1855–1926) USA – Semi-automatic pistol.
Mikhail Tsvet (1872–1919) Russia – chromatography (specifically adsorption chromatography the first chromatography method).
Raymond Kurzweil (born 1948) Optical character recognition; flatbed scanner.
Moritz von Jacobi (1801–1874) Germany/Russia – electrotyping electric boat.
Wallace H. Coulter (1913–1998) USA – Coulter counter (cell biology).
Frank Pantridge (1916–2004) Ireland – Portable defibrillator.
Henry Burden (1791–1871) Scotland and USA – Horseshoe machine first usable iron railed road spike.
Ken Kutaragi (born 1950) Japan – PlayStation.
William C. Brown (1916–1999) USA – Crossed-field amplifier.
A detective with his murder mystery a chemist seeking the structure of a new compound use little of the formal and logical modes of reasoning. Through a series of intuitions surmises fancies they stumble upon the right explanation and have a knack of seizing it when it once comes within reach. ~ Gilbert Lewis 1875 – 1946
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
Pierre Curie voluntarily exposed his arm to the action of radium for several hours. This resulted in damage resembling a burn that developed progressively and required several months to heal. Henri Becquerel had by accident a similar burn as a result of carrying in his vest pocket a glass tube containing radium salt. He came to tell us of this evil effect of radium exclaiming in a manner at once delighted and annoyed: “I love it but I owe it a grudge.” - Marie Curie 1867 to 1934 Chemist Physicist
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
Mathematics is the language in which the gods speak to people. ~ Plato c. 427 BC – c. 347 BC - Mathematician and Philosopher
I have eaten 2/3 of 1/3 of my food ration. 7 remains. How much food did I start with? ~ Cuneiform Babylonian mathematics exercise 1900 – 1600 BC
We cannot define anything precisely! If we attempt to we get into that paralysis of thought that comes to philosophers who sit opposite each other one saying to the other ‘You don’t know what you are talking about!’ The second one says ‘What do you mean by know? What do you mean by talking? What do you mean by you?’ and so on. ~ Richard Feynman 1918 to 1988
- 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.