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Johns Hopkins Applied Physics Laboratory
The Johns Hopkins University Applied Physics Laboratory (or simply Applied Physics Laboratory, or APL) is a not-for-profit university-affiliated research center (UARC) in Howard County, Maryland. It is affiliated with Johns Hopkins University and employs 8,700 people as of 2024. APL is the nation's largest UARC. The lab serves as a technical resource for the Department of Defense, NASA, and other government agencies. APL has developed numerous systems and technologies in the areas of air and missile defense, surface and undersea naval warfare, computer security, and space science and spacecraft construction. While APL provides research and engineering services to the government, it is not a traditional defense contractor, as it is a UARC and a division of Johns Hopkins University. APL is a scientific and engineering research and development division, rather than an academic division, of Johns Hopkins. Hopkins' Whiting School of Engineering offers part-time graduate programs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ralph Semmel
Ralph D. Semmel is an American engineer and computer scientist. He became the eighth director of the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, on July 1, 2010.Dr. Ralph Semmel', thedailyrecord.com In 2024, he announced that he would step down from his role in July 2025. Biography A native of Monroe, New York, Semmel earned a Bachelor of Science degree in engineering from the United States Military Academy at West Point, a Master of Science degree in systems management from the University of Southern California, a Master of Science degree in computer science from Johns Hopkins University and a Ph.D. in computer science from the University of Maryland, Baltimore County. Career Before joining APL, Semmel held leadership and technical positions with Wang Laboratories and the MITRE Corporation. He joined APL in 1986 after serving in the U.S. Army.Ralph Semmel, Director', jhuapl.edu From 1997 to 2010, Semmel was chair of Computer Science, Information Assu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Systems Engineering
Systems engineering is an interdisciplinary field of engineering and engineering management that focuses on how to design, integrate, and manage complex systems over their Enterprise life cycle, life cycles. At its core, systems engineering utilizes systems thinking principles to organize this body of knowledge. The individual outcome of such efforts, an engineered system, can be defined as a combination of components that work in synergy to collectively perform a useful Function (engineering), function. Issues such as requirements engineering, Reliability engineering, reliability, logistics, coordination of different teams, testing and evaluation, maintainability, and many other Discipline (academia), disciplines, aka List of system quality attributes, "ilities", necessary for successful system design, development, implementation, and ultimate decommission become more difficult when dealing with large or complex projects. Systems engineering deals with work processes, optimizat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missile Defense Agency
The Missile Defense Agency (MDA) is a component of the Federal government of the United States, United States government's United States Department of Defense, Department of Defense responsible for developing a comprehensive Missile defense, defense against ballistic missiles. It had its origins in the Strategic Defense Initiative (SDI) which was established in 1983 by Ronald Reagan and which was headed by James A. Abrahamson, Lt. General James Alan Abrahamson. Under the Strategic Defense Initiative's Innovative Sciences and Technology Office headed by physicist and engineer Dr. James Ionson, the investment was predominantly made in basic research at national laboratories, universities, and in industry. These programs have continued to be key sources of funding for top research scientists in the fields of high-energy physics, advanced materials, nuclear research, supercomputing/computation, and many other critical science and engineering disciplines—funding which indirectly suppo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science, Technology, Engineering, And Mathematics
Science, technology, engineering, and mathematics (STEM) is an umbrella term used to group together the distinct but related technical disciplines of science, technology, engineering, and mathematics. The term is typically used in the context of education policy or curriculum choices in schools. It has implications for workforce development, national security concerns (as a shortage of STEM-educated citizens can reduce effectiveness in this area), and immigration policy, with regard to admitting foreign students and tech workers. There is no universal agreement on which disciplines are included in STEM; in particular, whether or not the ''science'' in STEM includes social sciences, such as psychology, sociology, economics, and political science. In the United States, these are typically included by the National Science Foundation (NSF), the Department of Labor's O*Net online database for job seekers, and the Department of Homeland Security. In the United Kingdom, the social scien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laurel, Maryland
Laurel is a city in Maryland, United States, located midway between Washington, D.C., and Baltimore on the banks of the Patuxent River, in northern Prince George's County. Its population was 30,060 at the 2020 census. Founded as a mill town in the early 19th century, Laurel expanded local industry and was later able to become an early commuter town for Washington and Baltimore workers following the arrival of the Baltimore and Ohio Railroad in 1835. Largely residential today, the city maintains a historic district centered on its Main Street. The Department of Defense has a prominent presence in the Laurel area today, with the Fort Meade Army base, the NSA and Johns Hopkins' Applied Physics Laboratory all located nearby. Laurel Park, a thoroughbred horse racetrack, is located just outside the city limits. History Natural history Many dinosaur fossils from the Cretaceous Era are preserved in a park in Laurel. The site, which among other finds has yielded fossilized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pershing Operational Test Unit
The Pershing Operational Test Unit (POTU) was the U.S. Army agency responsible for the operational testing of the Pershing 1 Field Artillery Missile System, the Pershing 1a Field Artillery Missile System and the Pershing II Weapon System. Created in 1965, POTU was assigned to United States Army Europe and located in Heidelberg, Germany. Personnel consisted of one lieutenant colonel, two majors, one captain, two warrant officers and four non-commissioned officers. In 1965, the Army contracted with the Applied Physics Laboratory (APL) of Johns Hopkins University to develop and implement a test and evaluation program. APL developed the Pershing Operational Test Program (OTP), provided technical support to the Pershing Operational Test Unit (POTU), identified problem areas and improved the performance and survivability of the Pershing systems. POTU planned, scheduled, and executed the tests, evaluations, and missile firings to support OTP. POTU would select three firing batteries from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pershing Missile
The MGM-31A Pershing was the missile used in the Pershing 1 and Pershing 1a field artillery missile systems. It was a solid-fueled two-stage theater ballistic missile designed and built by Martin Marietta to replace the PGM-11 Redstone missile as the primary nuclear-capable theater-level weapon of the United States Army and replaced the MGM-1 Matador cruise missiles operated by the German Air Force. Pershing later replaced the European-based MGM-13 Mace cruise missiles deployed by the United States Air Force and the German Air Force. Development began in 1958, with the first test missile fired in 1960, the Pershing 1 system deployed in 1963 and the improved Pershing 1a deployed in 1969. The U.S. Army replaced the Pershing 1a with the Pershing II Weapon System in 1983 while the German Air Force retained Pershing 1a until all Pershings were eliminated in 1991. The U.S. Army Missile Command (MICOM) managed the development and improvements while the Field Artillery Branch deployed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Desert Storm
Operation or Operations may refer to: Arts, entertainment and media * ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * ''Operations'' (magazine), Multi-Man Publishing's house organ for articles and discussion about its wargaming products * ''The Operation'' (film), a 1973 British television film * ''The Operation'' (1990), a crime, drama, TV movie starring Joe Penny, Lisa Hartman, and Jason Beghe * The Operation M.D., formerly The Operation, a Canadian garage rock band * "Operation", a song by Relient K from '' The Creepy EP'', 2001 Television Episodes * "The Operation", ''Sky Dancers'' episode 27 (1996) * "The Operation", ''The Golden Girls'' season 1, episode 18 (1986) * "The Operation", ''You're Only Young Twice'' (1997) series 2, episode 8 (1978) Shows * ''The Operation'' (1992–1998), a reality television series from TLC Business * Manufacturing operations, operation of a f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RIM-50 Typhon
Typhon was a missile system developed by the United States Navy in the late 1950s, intended to serve as an integrated air-defense system for Navy fleets. Consisting of the SAM-N-8 Typhon LR, later designated RIM-50A, and the SAM-N-9 Typhon MR, later RIM-55A, paired with the AN/SPG-59 radar system, the cost of the Typhon system led to it being cancelled in favor of the Standard Missile program. Design and development Development of Typhon was initiated in the late 1950s, as the existing Talos, Terrier, and Tartar ("3 Ts") long-, medium-, and short-ranged missiles were considered to be approaching obsolescence; in the event of a mass attack by Soviet bomber forces, the requirement for each missile to have its own dedicated target illuminator would lead to rapid saturation of the defensive system. The Typhon system, developed under a contract awarded to the Bendix Corporation, would overcome this through the use of the AN/SPG-59 electronically scanned array radar system, capabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RIM-2 Terrier
The Convair RIM-2 Terrier was a two-stage medium-range naval surface-to-air missile (SAM), among the earliest SAMs to equip United States Navy ships. It underwent significant upgrades while in service, starting with beam-riding guidance with a range at a speed of Mach 1.8 and ending as a semi-active radar homing (SARH) system with a range of at speeds as high as Mach 3. It was replaced in service by the RIM-67 Standard ER (SM-1ER). Terrier has also been used as the base stage for a family of sounding rockets, beginning with the Terrier Malemute. History The Terrier was a development of the Bumblebee Project, the United States Navy's effort to develop a surface-to-air missile to provide a middle layer of defense against air attack (between carrier fighters and antiaircraft guns). It was test launched from on January 28, 1953, and first deployed operationally on the s, and , in the mid-1950s, with ''Canberra'' being the first to achieve operational status on Ju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tartar Missile
The General Dynamics RIM-24 Tartar was a medium-range naval surface-to-air missile (SAM), among the earliest SAMs to equip United States Navy ships. The Tartar was the third of the so-called "3 Ts", the three primary SAMs the Navy fielded in the 1960s and 1970s, the others being the RIM-2 Terrier and RIM-8 Talos. History The Tartar was born of a need for a more lightweight system for smaller ships that could engage targets at very close range. Essentially, the Tartar was simply a RIM-2C Terrier without the secondary booster. The Tartar was never given a SAM-N-x designation and was referred to as Missile Mk 15 until the unified Army-Navy designation system was introduced in 1963. The Tartar was used on several ships of a variety of sizes. Initially, the Mk 11 twin-arm launcher was used; later ships used the Mk 13 and Mk 22 single-arm launchers. Early versions proved to be unreliable. The Improved Tartar retrofit program upgraded the earlier missiles to the much improved RIM-24 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
