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
Understanding the history of matter and searching for its most interesting forms such as galaxies stars planets and life seems a suitable use for our intelligence. - Robert Kirshner 1949 to present Astronomer
Salih Tahtawi (fl.1659–1660) Mughal India – seamless globe and celestial globe.
Jacob Davis (1868–1908) USA – riveted jeans.
Gyula Takátsy (1914–1980) Hungary – first Microtiter plate.
Coenraad Johannes van Houten (1801–1887) Netherlands – cocoa powder cacao butter chocolate milk.
Forrest Parry (1921–2005) USA – Magnetic stripe card.
Zhang Heng (78–139) China – Seismometer first hydraulic-powered armillary sphere.
Pyotr Kapitsa (1894–1984) Russia – first ultrastrong magnetic field creating techniques basic low-temperature physics inventions.
James Dewar (1842–1923) UK – Thermos flask.
Charles Fabry (1867–1945) together with Alfred Perot (1863–1925) France – Fabry–Pérot interferometer (physics).
Rostislav Alexeyev (1916–1980) Russia – ekranoplan.
Anders Knutsson Ångström (1888–1981) Sweden – Pyranometer.
Leland Clark (1918–2005) USA – Clark electrode (medicine).
Igor Tamm (1895–1971) Russia – co-developer of tokamak.
Andrei Tupolev (1888–1972) Russia – turboprop powered long-range airliner (Tupolev Tu-114) turboprop strategic bomber (Tupolev Tu-95).
Franz Joseph Emil Fischer (1877–1947) together with Hans Schrader (1921–2012) Germany – Fischer assay (oil yield test).
Jonas Ferdinand Gabriel Lippmann (1845–1921) France – Lippmann plate Integral imaging Lippmann electrometer.
Roy Plunkett (1910–1994) United States – Teflon.
Carl Roman Abt (1850–1933) Switzerland – Abt rack railway system.
Friedrich Soennecken (1848–1919) Germany – Ring binder Hole punch.
Alexey Dushkin (1904–1977) Russia – deep column station.
This is an era of specialists each of whom sees his own problem and is unaware of or intolerant of the larger frame into which it fits. ~ Rachel Carson 1907 to 1964 - Marine Biologist
The legend that every cipher is breakable is of course absurd though still widespread among people who should know better. ~ J.E. Littlewood 1885 – 1977 - Mathematician
On the principle of successive variations not always supervening at an early age and being inherited at a corresponding not early period of life we can clearly see why the embryos of mammals birds reptiles and fishes should be so closely alike and should be so unlike the adult forms. ~ Charles Darwin 1809 to 1882 - Naturalist Evolutionary Biologist
It is thus probable that germs of the lowest organisms known to us are continually being carried away from the earth and the other planets upon which they exist. As seeds in general so most of these spores thus carried away will no doubt meet death in the cold infinite space of the universe. Yet a small number of spores will fall on some other world and may there be able to spread life if conditions be suitable. ~ Svante Arrhenius 1859 to 1927 - Physical Chemist
Valid criticism does you a favor. - Carl Sagan 1934 to 1996 Astronomer
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
Macroscopic objects as we see them all around us are governed by a variety of forces derived from a variety of approximations to a variety of physical theories. In contrast the only elements in the construction of black holes are our basic concepts of space and time. They are thus almost by definition the most perfect macroscopic objects there are in the universe. ~ Subrahmanyan Chandrasekhar 1910 to 1995
- 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.