Space has been an interest for philosophers and scientists for much of human
history. The term is used somewhat differently in different fields of
study, hence it is difficult to provide an uncontroversial and clear
definition outside of specific defined contexts. Disagreement also
exists on whether space itself can be measured or is part of the
measuring system. (See Space in philosophy.) Many fields use an operational definition in which the units of measurement are defined, but not space itself.
Defense Advanced Research Projects Agency (DARPA) is an agency of the United States Department of Defense responsible for the development of new technology for use by the military. DARPA was responsible for funding development of many technologies which have had a major impact on the world, including computer networking (starting with the ARPANET, which eventually grew into the Internet), as well as NLS, which was both the first hypertext system, and an important precursor to the contemporary ubiquitous graphical user interface.
Its original name was simply Advanced Research Projects Agency (ARPA), but it was renamed DARPA (for Defense) on March 23, 1972, then back to ARPA on February 22, 1993, and then back to DARPA again on March 11, 1996.
DARPA was established in 1958 in response to the Soviet launching of Sputnik in 1957,
with the mission of keeping the US's military technology ahead of its
enemies. DARPA is independent from other more conventional military
R&D and reports directly to senior Department of Defense
management. DARPA has around 240 personnel (about 140 technical)
directly managing a $3.2 billion budget. These figures are "on average"
since DARPA focuses on short-term (two to four-year) projects run by
small, purpose-built teams.
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DARPA's Mission
From DARPA's own introduction (pdf):
"DARPA is a Defense Agency with a unique role within DoD. DARPA is not
tied to a specific operational mission: DARPA supplies technological
options for the entire Department, and is designed to be the
“technological engine” for transforming DoD.
Near-term needs and requirements generally drive the Army, Navy,
Marine Corps, and Air Force to focus on those needs at the expense of
major change. Consequently, a large organization like DoD needs a place
like DARPA whose only charter is radical innovation.
DARPA looks beyond today’s known needs and requirements. As military
historians note, “None of the most important weapons transforming
warfare in the 20th century – the airplane, tank, radar, jet engine,
helicopter, electronic computer, not even the atomic bomb – owed its
initial development to a doctrinal requirement or request of the
military.” And to this list, DARPA would add unmanned systems, Global Positioning System (GPS) and Internet technologies.
DARPA’s approach is to imagine what capabilities a military
commander might want in the future and accelerate those capabilities
into being through technology demonstrations. These not only provide
options to the commander, but also change minds about what is
technologically possible today."
DARPA was created as the Advanced Research Projects Agency (ARPA),
by Public Law 85-325 and Department of Defense Directive 5105.41, in
February 1958. Its creation was directly attributed to the launching of
Sputnik and to U.S. realization that the Soviet Union
had developed the capacity to rapidly exploit military technology.
Additionally, the political and defense communities recognized the need
for a high-level Department of Defense organization to formulate and
execute R&D projects that would expand the frontiers of technology
beyond the immediate and specific requirements of the Military Services
and their laboratories. In pursuit of this mission, DARPA has developed
and transferred technology programs encompassing a wide range of
scientific disciplines which address the full spectrum of national
security needs.
From 1958-1965, ARPA's emphasis centered on major national issues,
including space, ballistic missile defense, and nuclear test detection.
In 1960, all of its civilian space programs were transferred to the National Aeronautics and Space Administration (NASA) and the military space programs to the individual Services. This allowed DARPA to concentrate its efforts on the DEFENDER (defense against ballistic missiles), Project Vela (nuclear test detection), and AGILE
(counterinsurgency R&D) Programs, and to begin work on computer
processing, behavioral sciences, and materials sciences. The DEFENDER
and AGILE Programs formed the foundation of DARPA sensor, surveillance,
and directed energy R&D, particularly in the study of radars,
infrared sensing, and x-ray/gamma ray detection.
In the late 1960s, with the transfer of these mature programs to the
Services, ARPA redefined its role and concentrated on a diverse set of
relatively small, essentially exploratory research programs. The Agency
was renamed the Defense Advanced Research Projects Agency (DARPA) in
1972, and in the early 1970s, it emphasized direct energy programs,
information processing, and tactical technologies.
In the area of information processing, DARPA made great strides, initially through its support of the development of time-sharing (all modern operating systems are descendants of the Multics system, developed by a cooperation between Bell Labs, General Electric and MIT, which DARPA supported by funding Project MAC at MIT with an initial two-million-dollar grant), and later through the evolution of the ARPANET (a telecommunications network and precursor to the Internet), and research in the artificial intelligence (AI) fields of speech recognition and signal processing. DARPA also funded the development of the Douglas Engelbart's NLS computer system and the Aspen Movie Map, which was probably the first hypermedia system and an important precursor of virtual reality.
The controversial Mansfield Amendment
of 1973 expressly limited appropriations for defense research (through
ARPA/DARPA) to projects with direct military application. Some contend
that the amendment devastated American science, since ARPA/DARPA was a
major funding source for basic science projects at the time; the National Science Foundation never took up the slack as expected. But the resulting brain drain
is also credited with boosting the development of the fledgling
personal computer industry. Many young computer scientists fled from
the universities to startups and private research labs like Xerox PARC.
From 1976-1981, DARPA's major thrusts were dominated by air, land,
sea, and space technology, such as follow-on forces attack with
standoff weapons and associated Command, Control, and Communications;
tactical armor and anti-armor programs; infrared sensing for
space-based surveillance; high-energy laser technology for space-based
missile defense; antisubmarine warfare; advanced cruise missiles;
advanced aircraft; and defense applications of advanced computing.
These large-scale technological program demonstrations were joined by
integrated circuit research, which resulted in submicron electronic
technology and electron devices that evolved into the Very Large Scale
Integration (VLSI)
Program and the Congressionally mandated charged particle beam program.
Many of the successful programs were transitioned to the Services, such
as the foundation technologies in automatic target recognition, space
based sensing, propulsion, and materials that were transferred to the Strategic Defense Initiative Organization (SDIO), now known as the Ballistic Missile Defense Organization (BMDO).
During the 1980s, the attention of the Agency was centered on
information processing and aircraft-related programs, including the National Aerospace Plane (NASP) or Hypersonic Research Program. The Strategic Computing Program
enabled DARPA to exploit advanced processing and networking
technologies and to rebuild and strengthen relationships with
universities after the Vietnam War. In addition, DARPA began to pursue new concepts for small, lightweight satellites (LIGHTSAT) and directed new programs regarding defense manufacturing, submarine technology, and armor/anti-armor.
DARPA has eight program offices, all of which report to DARPA director Dr. Anthony J. Tether.
(Note that as of July 2006 SPO and ATO have been merged into a single
Strategic Technology Office (STO) that complements the Tactical
Technology Office (TTO) as one of the two "systems" offices.)
The Advanced Technology Office (ATO)
researches, demonstrates, and develops high payoff projects in
maritime, communications, special operations, command and control, and
information assurance and survivability mission areas.
The Defense Sciences Office (DSO)
vigorously pursues the most promising technologies within a broad
spectrum of the science and engineering research communities and
develops those technologies into important, radically new military
capabilities.
The Information Exploitation Office (IXO)
develops sensor and information system technology and systems with
application to battle space awareness, targeting, command and control,
and the supporting infrastructure required to address land-based
threats in a dynamic, closed-loop process. IXO leverages ongoing DARPA
efforts in sensors, sensor exploitation, information management, and
command and control, and addresses systemic challenges associated with
performing surface target interdiction in environments that require
very high combat identification confidence and an associated low
likelihood for inadvertent collateral damage.
The Microsystems Technology Office (MTO)
mission focuses on the heterogeneous microchip-scale integration of
electronics, photonics, and microelectromechanical systems (MEMS).
Their high risk/high payoff technology is aimed at solving the national
level problems of protection from biological, chemical and information
attack and to provide operational dominance for mobile distributed
command and control, combined manned/unmanned warfare, and dynamic,
adaptive military planning and execution.
The Special Projects Office (SPO)
researches, develops, demonstrates, and transitions technologies
focused on addressing present and emerging national challenges. SPO
investments range from the development of enabling technologies to the
demonstration of large prototype systems. SPO is developing
technologies to counter the emerging threat of underground facilities
used for purposes ranging from command-and-control, to weapons storage
and staging, to the manufacture of weapons of mass destruction. SPO is
also developing significantly more cost-effective ways to counter
proliferated, inexpensive cruise missiles, UAVs, and other platforms
used for weapon delivery, jamming, and surveillance. SPO is investing
in novel space technologies across the spectrum of space control
applications including rapid access, space situational awareness,
counterspace, and persistent tactical grade sensing approaches
including extremely large space apertures and structures.
The Tactical Technology Office (TTO)
engages in high-risk, high-payoff advanced military research,
emphasizing the "system" and "subsystem" approach to the development of
aeronautic, space, and land systems as well as embedded processors and
control systems.
In the video game series Metal Gear Solid,
both ARPA and DARPA are mentioned as part of the plotline, and
references how ARPA eventually became DARPA in the future. In these
games, DARPA funded and created an experimental battle tank that
utilises a bipedal design and is capable of carrying nuclear warheads,
alongside a compliment of conventional weaponry including cannons, rocket launchers, a rail gun, and a futuristic laser rifle. This vehicle was named "Metal Gear REX".
DARPA is mentioned in the Matthew Reilly books Temple and Hell Island. In Temple, DARPA plays a role in creating the super thermonuclear missile, the "Supernova". In Hell Island, DARPA is part of the villains testing out a "super trooper" experiment.
DARPA and ARPA are brought into context in episodes of The West Wing.
In one, a DARPA employee, Dr. Max Milkman, discusses the difference
between the two, and focuses on some of the organization's operations
and projects.
In James Rollins' books Sandstorm (2004), Map of Bones (2005) and Black Order (2006) some of the main characters are part of a fictional organization called Sigma Force, a covert branch of DARPA, tasked with safeguarding, acquiring, or neutralizing "technologies vital to U.S. security."
In "The Patriot" Steven Seagal's character was a former DARPA scientist who specialized in biological research.
Have you ever wondered how much information we are
generating?A 2002 study at the University of California
at Berkeley,
shows that the world produces between 1 and 2 exabytes (an exabyte is 1018
bytes or a billion gigabytes) of unique information per year, which is roughly
250 megabytes for every individual on the face of the earth.Most of this data is already digital, as only
.003% of this total is due to printed documents.
Looking solely at the web, static pages on the web are
estimated at 2.5 billion.Taking into
account all the web-accessible information, such as web-connected databases and
dynamic pages, there are roughly 550 billion web pages.The amount of web content is also growing at
a phenomenal 100% per year.In terms of
storage,it would take 7,500 terabytes (
a terabyte is 1024 gigabytes or 1012 bytes) to store all this web
data in one place based on estimated average page sizes.
The numbers are simply staggering, and if not bad enough
email is an even bigger content source than the web.Estimates on email range from 610 billion to
2000 billion email messages sent each year.Conservative estimates put the storage for email between 11,000 and
20,000 terabytes.
If your wondering how we will ever sort through all this
information of Carl Sagan proportions, your not alone.Without an automated solution, one could
imagine becoming buried in useless digital data, as email volumes increase and
the web continues to expand.The most
promise may come through the use of intelligent software agents, or bots as
they are affectionately called, that work on our behalf.
Bots are simply computer programs that act without human
intervention to accomplish a task.There
are a variety of Bots in use today.You
can find numerous shopbots on the web that will scour the web on your behalf
searching for the lowest price on a particular item.Many other vendors are touting bots, which
will function as virtual sales reps or customer-service agents.These bots come complete with high quality
animation, video, and audio.They will
chat with potential customers or current customers until they draw a blank and
then refer the customer to a real person.Granted they may be crude today, but bots may be the only means to manage
this information explosion that is occurring.