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Jeffrey Chen

Mormon media in the 20th century - 1 views

www.ldschurchnews.com/...in-20th-century-Mormonism.html

digiciv media mormonism lds.org

shared by Jeffrey Chen on 21 Oct 10 - No Cached
  • Jeffrey Chen on 21 Oct 10
     
    Check this out. The Church really embraces media as a tool for good!
Kevin Watson

Overview of the Industrial Revolution in the 19th Century - 0 views

americanhistory.about.com/...lution-in-the-19th-century.htm

digiciv industrial revolution America

shared by Kevin Watson on 04 Oct 10 - No Cached
  • Kevin Watson on 04 Oct 10
     
    Great short Entry on the effects of the industrial Revolution on America.
Kristi Koerner

Theories of Religion in Early 20th Century Psychology@Everything2.com - 0 views

everything2.com/...+Early+20th+Century+Psychology

religion psychology

shared by Kristi Koerner on 02 Nov 10 - No Cached
  • Freud believed humanity is moving through three stages of development: Tribal, Religious, Scientific.  He believed society would eventually cast off the unnecessary and unfounded ideals of religion in trade for the exactitudes and truth offered by the scientific method.
  • Unlike Sigmund Freud, who believed religion to be an illusory wish fulfillment for the weak minded, Carl Jung advocated religion as an indispensable part of an individual's psychological development. Jung viewed the mind as having three components: the ego, the personal unconscious, and the collective unconscious. Freud's vision of the mind did not include a collective unconscious. Instead, Freud proposed a moral super-ego, which grew to become the mind's administrator according to a learned sense of morality. Jung believed the self-actualizing properties of Freud's super ego pre-exist in the mind as a collective unconscious which is to be discovered through introspection as opposed to learned from experience.
  • Kristi Koerner on 02 Nov 10
     
    Good contrast btw Freud and Jung
Jake Corkin

Kurt Godel - 0 views

kgs.logic.at/index.php

computing age Godel

shared by Jake Corkin on 07 Nov 10 - No Cached
  • Jake Corkin on 07 Nov 10
     
    Here is a personal and scientific biography of Kurt Godel, a great 20th century mind.
Katherine Chipman

The Engines - The Babbage Engine | Computer History Museum - 0 views

www.computerhistory.org/...engines

babbage

shared by Katherine Chipman on 14 Oct 10 - Cached
  • Difference engines are strictly calculators. They crunch numbers the only way they know how - by repeated addition according to the method of finite differences. They cannot be used for general arithmetical calculation. The Analytical Engine is much more than a calculator and marks the progression from the mechanized arithmetic of calculation to fully-fledged general-purpose computation.
  • Physical Legacy Aside from a few partially complete mechanical assemblies and test models of small working sections, none of Babbage's designs was physically realized in its entirety in his lifetime. The major assembly he did complete was one-seventh of Difference Engine No. 1, a demonstration piece consisting of about 2,000 parts assembled in 1832. This works impeccably to this day and is the first successful automatic calculating device to embody mathematical rule in mechanism. A small experimental piece of the Analytical Engine was under construction at the time of Babbage's death in 1871. Many of the small experimental assemblies survived, as does a comprehensive archive of his drawings and notebooks. The designs for Babbage's vast mechanical computing engines rank as one of the startling intellectual achievements of the 19th century. It is only in recent decades that his work has been studied in detail and that the extent of what he accomplished becomes increasingly evident.
  • Katherine Chipman on 14 Oct 10
     
    Great explanation of the difference between difference engines and analytical engines.
Bri Zabriskie

Difference engine - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Difference_engine

shared by Bri Zabriskie on 13 Oct 10 - Cached
    • Bri Zabriskie
      Bri Zabriskie on 13 Oct 10
       
      cool!:D
  • he difference engine and printer were constructed to tolerances achievable with 19th century technology, resolving a long-standing debate whether Babbage's design would actually have worked.
Katherine Chipman

Welcome to FamilySearch - 0 views

new.familysearch.org/...welcome

lds technology

shared by Katherine Chipman on 21 Oct 10 - No Cached
  • Katherine Chipman on 21 Oct 10
     
    New.FamilySearch.org helps members of the church around the world organize and find information about their ancestors and ensure that their temple work is done. This is an example of what Elder Ballard said. He said, "The Lord over the centuries has had a hand in inspiring people to invent tools that facilitate the spreading of the gospel. The Church has adopted and embraced those tools, including print, broadcast media, and now the Internet."
Shuan Pai

History Magazine - The Impact of Refrigeration - 0 views

www.history-magazine.com/refrig.html

shared by Shuan Pai on 16 Nov 10 - Cached
  • Refrigeration brought distant production centers and the North American population together. It tore down the barriers of climates and seasons. And while it helped to rev up industrial processes, it became an industry itself.
    • Shuan Pai
      Shuan Pai on 16 Nov 10
       
      Allowed all types of food to be made available year-round
  • Ice was harvested and stored in China before the first millennium. Hebrews, Greeks, and Romans placed large amounts of snow into storage pits and covered this cooling agent with insulating material.
  • ...2 more annotations...
  • For centuries, people preserved and stored their food — especially milk and butter — in cellars, outdoor window boxes or even underwater in nearby lakes, streams or wells.
  • food preservation used time-tested methods: salting, spicing, smoking, pickling and drying.
  • Shuan Pai on 16 Nov 10
     
    how the invention of refrigerators affected society
James Wilcox

Airplane Timeline - Greatest Engineering Achievements of the Twentieth Century - 0 views

www.greatachievements.org/?id=3728

digiciv

shared by James Wilcox on 15 Nov 10 - Cached
    • James Wilcox
      James Wilcox on 15 Nov 10
       
      I love helicopters!  But I never knew that they had been around for so many years.
  • 1947   Sound barrior broken U.S. Air Force pilot Captain Charles "Chuck" Yeager becomes the fastest man alive when he pilots the Bell X-1 faster than sound for the first time on October 14 over the town of Victorville, California.
  • 1952   Discovery of the area rule of aircraft design Richard Whitcomb, an engineer at Langley Memorial Aeronautical Laboratory, discovers and experimentally verifies an aircraft design concept known as the area rule. A revolutionary method of designing aircraft to reduce drag and increase speed without additional power, the area rule is incorporated into the development of almost every American supersonic aircraft. He later invents winglets, which increase the lift-to-drag ratio of transport airplanes and other vehicles.
  • ...7 more annotations...
  • 1925-1926   Introduction of lightweight, air-cooled radial engines The introduction of a new generation of lightweight, air-cooled radial engines revolutionizes aeronautics, making bigger, faster planes possible.
  •   1917   The Junkers J4, an all-metal airplane, introduced Hugo Junkers, a German professor of mechanics introduces the Junkers J4, an all-metal airplane built largely of a relatively lightweight aluminum alloy called duralumin.
  • 1904   Concept of a fixed "boundary layer" described in paper by Ludwig Prandtl German professor Ludwig Prandtl presents one of the most important papers in the history of aerodynamics, an eight-page document describing the concept of a fixed "boundary layer," the molecular layer of air on the surface of an aircraft wing. Over the next 20 years Prandtl and his graduate students pioneer theoretical aerodynamics.
  • 1933   First modern commercial airliner In February, Boeing introduces the 247, a twin-engine 10-passenger monoplane that is the first modern commercial airliner. With variable-pitch propellers, it has an economical cruising speed and excellent takeoff. Retractable landing gear reduces drag during flight.
  • 935   First practical radar British scientist Sir Robert Watson-Watt patents the first practical radar (for radio detection and ranging) system for meteorological applications. During World War II radar is successfully used in Great Britain to detect incoming aircraft and provide information to intercept bombers.
  • 1937   Jet engines designed Jet engines designed independently by Britain’s Frank Whittle and Germany’s Hans von Ohain make their first test runs. (Seven years earlier, Whittle, a young Royal Air Force officer, filed a patent for a gas turbine engine to power an aircraft, but the Royal Air Ministry was not interested in developing the idea at the time. Meanwhile, German doctoral student Von Ohain was developing his own design.) Two years later, on August 27, the first jet aircraft, the Heinkel HE 178, takes off, powered by von Ohain’s HE S-3 engine.
  •   1939   First practical singlerotor helicopters Russian emigre Igor Sikorsky develops the VS-300 helicopter for the U.S. Army, one of the first practical singlerotor helicopters.
Andrew DeWitt

NASA - NASA Helps Kick Off Competition for Bright Minds - 0 views

www.nasa.gov/...bright_minds.html

nasa competition aviation flight

shared by Andrew DeWitt on 15 Nov 10 - No Cached
  • "In the first century of flight, NASA made countless contributions to aviation by improving performance, efficiency and safety. Just as we needed the brightest minds for all those contributions, we need the brightest minds now and in the future to develop, operate and improve our future air transportation system,"
  • Teams of three to seven high school students from at least 29 states and the District of Columbia will compete to design a more fuel-efficient airplane
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