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
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
Georgy Beriev (1903–1979) Georgia/Russia – Be-series amphibious aircraft.
Barnes Wallis (1887–1979) UK – bouncing bomb.
Dennis Ritchie (1941–2011) USA – C (programming language).
Aaron D. O'Connell (born 1981) USA – first Quantum machine.
Pyotr Shilovsky (1871 – after 1924) Russia/United Kingdom – gyrocar.
Dean Kamen (born 1951) USA – Invented the Segway HT scooter and the IBOT Mobility Device.
James Hargreaves (1720–1778) UK – spinning jenny.
Elihu Thomson (1853–1937) UK USA – Prolific inventor Arc lamp and many others.
Otto Lilienthal (1848–1896) Germany – hang glider.
Taqi al-Din Muhammad ibn Ma'ruf (1526–1585) Syria/Egypt/Turkey – steam turbine six-cylinder 'Monobloc' suction pump framed sextant.
Dawon Kahng (1931–1992) South Korea together with Simon Sze (1936–) Taiwan/USA – Floating-gate MOSFET.
Daniel Gabriel Fahrenheit (1686–1736) The Netherlands – Fahrenheit temperature scale Mercury-in-glass thermometer.
Charles Xavier Thomas de Colmar (1785–1870) France – Arithmometer.
John Logie Baird (1888–1946) Scotland – an electromechanical television electronic color television.
Igor Tamm (1895–1971) Russia – co-developer of tokamak.
David Strang (inv. 1890) New Zealand – first Instant coffee.
William Bradford Shockley (1910–1989) USA – co-inventor of transistor.
Thomas Savery (1650–1715) UK – steam engine.
Semen Korsakov (1787–1853) Russia – punched card for information storage.
René Laennec (1781–1826) France – stethoscope.
Before the Copernican revolution it was natural to suppose that God’s purposes were specifically concerned with the earth but now this has become an unplausible hypothesis. If it is the purpose of the Cosmos to evolve mind we must regard it as rather incompetent in having produced so little in such a long time. ~ Bertrand Russell 1872 – 1970 - Mathematician and Philosopher
What is possible in the Cavendish Laboratory may not be too difficult in the sun. - Sir Arthur Eddington 1882 to 1944 Astronomer Physicist Mathematician
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
Physics is actually too hard for physicists. ~ David Hilbert 1862 to 1943 (Mathematician)
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
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
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
- Main Function:G18 is merely gsm alarm system,G183 update version work with 3G gsm sim card DIY home security alarm system,which can either work in standalone mode without sim card or a standard size sim card(not micro and nano) to call/text up to 6 phone numbers via cellular network,AT&T,T-mobile sim card recommend.As 2G will be no longer available in the USA in 2019,AT&T has already shut off 2G service in 2017.3G alarm system more reliable than the wifi one in case of the internet failure.
- APP Control burglar system:First download app(search "G18 alarm system" at google or iphone app store) free and register an account,insert a sim card to alarm keypad,remote control the security system by text in APP on your smartphone from anywhere at anytime.PIR motion sensor detect any suspicious movement or activity,Door/window sensor detect any forceful break-in.When detectors are triggered,the alarm host will receive the alarm alert meantime call your phone,disarm it by app/sms/call
- Brief Description:This is an indoor basic security alarm system kit complete with fully programmable main unit and sensors,can be used directly after unplugging insulation sheet to protect home,office,shop apartment,business;DIY supportable 99 wireless zones up to 150 remote key fobs and 150 sensors,add more sensors as detailed need such as gas detector,water leaking sensor to provide all-around reliable protection.Additional Sensors can be find in our shop or we can customize the kits for you.
- Humanized Design: Easy operation with TFT color touch screen,voice prompt design during setting;Built in 3.7V 800mAh rechargeable lithium battery that can last about 6-8 hours with full power, it will change to use battery to work in the case of power failure, just make sure that switch is on. Other useable features such as arming delay, keypad lock, timing arming etc.
- Customer Service: 12-month warranty, professional technical support and friendly responsive customer service within 24 hours. If you have any questions, welcome to contact us via amazon emails or seach "KERUI G183 security alarm system introduction" on youtube.
- ALL-IN-ONE HOME AUTOMATION: Make your house a smart home in minutes, one room at a time. Simply replace your Dual Switch (double gang) light switch with NuBryte Touchpoint. Connect & Protect, from any NuBryte console, or remotely via Nubryte APP.
- HOME SECURITY: Detract and deter with 100 decibel siren and flashing overhead lights. Instant video alerts to your phone when triggered (with NuBryte APP). Built-in wide-angle camera and advanced motion detection up to 30'. No Contracts/Monthly Fees.
- SMART LIGHTING: Touch-Free light control, and 5 easy-to-use lighting automation and digital dimming modes. Motion-based on/off, Morning Wake Up, Bedtime dimmer, Night light and Vacation lights. Works with standard dimmable bulbs.
- INTERCOM: Combine 2 or more Touchpoint consoles for an instant home intercom system. (WiFi)
- FAMILY HUB: Indoor/Outdoor Temperature & Humidity, 5-Day Weather Forecast, Calendar, Notifications and Event Alerts, Energy Monitoring, and more! Now, with Amazon Alexa voice control with Echo, Dot, and Tap!
- Updated 2015 Model with Newest Firmware and Software
- Wifi Connectivity for Remote and Monitoring Options (Requires Monthly Fee)
- Zwave ready for Control of Lights, Door locks, Thermostats and Garage Doors
- Award Winning Technology and Design
- Includes: (3) 5816 Door/Window Transmitters, (1) 5834-4 Four-Button Wireless Keyfob (1) 5800 Pir-Res Wireless Motion Detector (1) Wifi Module (1) Zwave Module (1) 4gl GSM Cellular module