Secondary Source

Bridging rivers, gorges, narrows, straits, and valleys always has played an important role in the history of human settlement. Since ancient times, bridges have been the most visible testimony of the noble craft of engineers. A bridge can be defined in many ways, but Andrea Palladio, the great 16th century Italian architect and engineer, hit on the essence of bridge building when he said "...bridges should befit the spirit of the community by exhibiting commodiousness, firmness, and delight." In more practical terms, he went on to explain that the way to avoid having the bridge carried away by the violence of water was to make the bridge without fixing any posts in the water. Since the beginning of time, the goal of bridge builders has been to create as wide a span as possible which is commodious, firm, and occasionally delightful. Spanning greater distances is a distinct measure of engineering prowess.

Technocapitalism is a new form of market capitalism that is rooted in technological invention and innovation.  It can be considered an emerging era, now in its early stage, that is supported by such intangibles as creativity and knowledge.

The VL is the oldest catalog of the web, started by Tim Berners-Lee, the creator of html and the web itself. Unlike commercial catalogs, it is run by a loose confederation of volunteers, who compile pages of key links for particular areas in which they are expert; even though it isn't the biggest index of the web, the VL pages are widely recognised as being amongst the highest-quality guides to particular sections of the web.

This is a dictionary of algorithms, algorithmic techniques, data structures, archetypical problems, and related definitions. Algorithms include common functions, such as Ackermann's function. Problems include traveling salesman and Byzantine generals. Some entries have links to implementations and more information. Index pages list entries by area and by type. The two-level index has a total download 1/20 as big as this page.

On June 23 1794, Robert Baldry and Richard Randall drew up an agreement for the building of "a new and substantial Bridge of brickwork over the River or Rivulet dividing the parishes of Ubbeston and Heveningham at and for the sum of seventy-six pounds". The two men were the Surveyors of Ubbeston, responsible for the supervision of all buildings within the village, and Robert Baldry was especially well placed to oversee this particular work since he had built the present Old Rectory for his own use eighteen years before (his initials can still be see on the chimney stack).

Marshall Nirenberg is best known for “breaking the genetic code” in 1961, an achievement that won him the Nobel Prize. But what exactly is the genetic code? And how did he decipher it? This exhibit will explore genetics research in the 1950s and 1960s and explain the importance of Nirenberg's experiments and discoveries.

The Columbia STS-107 mission lifted off on January 16, 2003, for a 17-day science mission featuring numerous microgravity experiments. Upon reentering the atmosphere on February 1, 2003, the Columbia orbiter suffered a catastrophic failure due to a breach that occurred during launch when falling foam from the External Tank struck the Reinforced Carbon Carbon panels on the underside of the left wing. The orbiter and its seven crewmembers (Rick D. Husband, William C. McCool, David Brown, Laurel Blair Salton Clark, Michael P. Anderson, Ilan Ramon, and Kalpana Chawla) were lost approximately 15 minutes before Columbia was scheduled to touch down at Kennedy Space Center. This site presents information about the STS-107 flight, as well as information related to the accident and subsequent investigation by the formal Columbia Accident Investigation Board.

Although these achievements are fundamental to modern mathematics and physics, it is less well known that Newton himself placed great value on his private researches into theology and alchemy. Interest in the wealth of surviving manuscript material in these areas has increased dramatically in recent years, and the Newton Project was formed in 1998 to make all Newton's texts, both 'scientific' and 'non-scientific' (including those papers relevant to his three decades service at the Royal Mint), available to a broad readership in a form that is at once scholarly and accessible. The Project aims to create a printed edition of Newton's theological, alchemical and administrative writings and an electronic edition of all his writings, including his correspondence.

Welcome to the Invisible Revolution, the story of Doug Engelbart, the man who invented much of the computer environment we live in today - and still few know his name. This is his story, and the story of his fellow dreamers, thinkers, doers - revolutionaries - who changed our lives forever.

Am I pregnant? The answer to this age-old question once demanded a combination of guesswork, intuition, and time. In 1978, however, the long wait to know for sure became a thing of the past. Trumpeted by advertisements as “a private little revolution,” the first home pregnancy tests started appearing on drug store shelves that year. A quarter of a century later, innovations promise to make even the telltale thin blue line obsolete. This web site looks at the history of the home pregnancy test—one of the most ubiquitous home healthcare products in America—and examines its place in our culture.

The home pregnancy test works by identifying the presence of the “pregnancy hormone,” human chorionic gonadotropin (hCG), in urine. Research that led to a sensitive, accurate test for hCG was done by scientists in the Reproductive Research Branch of the National Institute of Child Health and Human Development at NIH.