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SDSU Transit Center
SDSU Transit Center is a San Diego Trolley station on the Green Line and bus hub. It is located on the campus of San Diego State University (SDSU). The line connects the main campus with SDSU Mission Valley, a noncontiguous campus expansion which contains Snapdragon Stadium. The entrances are between College Avenue and Campanile Drive. The station is underground (the only such station in the system), and has side platforms. The bus plaza opened in February 2005 while the trolley platforms opened on July 10, 2005, with the rest of the Green Line. History In 1989, the San Diego Metropolitan Transit Development Board began developing plans for an additional trolley line connecting its Blue and Orange lines. The new line was initially expected to cost $506 million and cover of track. After initially looking at over ten different routes to connect the two lines, the board initially recommended connecting San Diego State University at the north end of its campus, near Interstate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego
San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in the United States. San Diego is the county seat, seat of San Diego County. It is known for its mild Mediterranean climate, extensive List of beaches in San Diego County, beaches and List of parks in San Diego, parks, long association with the United States Navy, and recent emergence as a wireless, electronics, List of hospitals in San Diego, healthcare, and biotechnology development center. Historically home to the Kumeyaay people, San Diego has been referred to as the ''Birthplace of California'', as it was the first site visited and settled by Europeans on what is now the West Coast of the United States. In 1542, Juan Rodríguez Cabrillo claimed the area for Spain, forming the basis for the settlement of Alta California, 200 years later. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Austrian Tunneling Method
The new Austrian tunneling method (NATM), also known as the sequential excavation method (SEM) or sprayed concrete lining method (SCL), is a method of modern tunnel design and construction employing sophisticated monitoring to optimize various wall reinforcement techniques based on the type of rock encountered as tunneling progresses. This technique first gained attention in the 1960s based on the work of Ladislaus von Rabcewicz, Leopold Müller, and Franz Pacher between 1957 and 1965 in Austria. The name NATM was intended to distinguish it from earlier methods, with its economic advantage of employing inherent geological strength available in the surrounding rock mass to stabilize the tunnel wherever possible rather than reinforcing the entire tunnel. NATM/SEM is generally thought to have helped revolutionise the modern tunneling industry. Many modern tunnels have used this excavation technique. The Sequential Excavation Method is very cost effective, even in karst conditions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Stations Located Underground In California
Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in tracks, which usually consist of two parallel steel rails. Rail transport is one of the two primary means of land transport, next to road transport. It is used for about 8% of passenger and freight transport globally, thanks to its energy efficiency and potentially high speed.Rolling stock on rails generally encounters lower frictional resistance than rubber-tyred road vehicles, allowing rail cars to be coupled into longer trains. Power is usually provided by diesel or electric locomotives. While railway transport is capital-intensive and less flexible than road transport, it can carry heavy loads of passengers and cargo with greater energy efficiency and safety. Precursors of railways driven by human or animal power have existed since antiquity, but modern rail transport began with the invention of the steam locomotive in the United Kingdom at the beginning of the 19th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of San Diego Trolley Stations
The San Diego Trolley is a light rail system operating in San Diego County, California. The trolley's operator, San Diego Trolley, Inc. (reporting mark SDTI), is a subsidiary of the San Diego Metropolitan Transit System (MTS). The San Diego Trolley opened for service on July 26, 1981. It operates four primary lines (Blue Line (San Diego Trolley), Blue, Orange Line (San Diego Trolley), Orange, Green Line (San Diego Trolley), Green, and Copper Line (San Diego Trolley), Copper) as well as a supplementary heritage streetcar downtown loop known as the Silver Line (San Diego Trolley), Silver Line that operates on holidays. History The current operating company of the San Diego Trolley system, San Diego Trolley Incorporated (SDTI), was not founded until 1980 when the Metropolitan Transit Development Board (now operating as San Diego's San Diego Metropolitan Transit System, MTS) began to plan a light-rail service along the Main Line of the former San Diego and Arizona Eastern Railway (SD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leon Williams (politician)
Leon Lawson Williams (July 21, 1922 – March 1, 2025) was an American politician. He served as a member of the San Diego City Council starting from 1969 to 1982. He also was elected as a member of the San Diego County Board of Supervisors for three terms from 1982 to 1994, chairing the board in 1985 and 1990. He was the first Black person elected to these positions. Dubbed "Mr. San Diego" by the San Diego Rotary Club, he has been described as having left one of "the most significant legacies in San Diego's history", prioritizing civil rights and equitable development in San Diego. Life and career Williams was born on July 21, 1922 in Oklahoma, the oldest of 15 children. His family, amid the Dust Bowl, moved to Bakersfield, California, Bakersfield, California. He would later move to the San Diego area in 1941 as he served in the Army Corp of Engineers at North Island Naval Air Station. He encountered racism upon arriving in San Diego, having recounted a racist incident when he had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold Cathode
A cold cathode is a cathode that is not electrically heated by a Electrical filament, filament.A negatively charged electrode emits electrons or is the positively charged terminal. For more, see field emission. A cathode may be considered "cold" if it emits more electrons than can be supplied by thermionic emission alone. It is used in Gas discharge lamp, gas-discharge lamps, such as neon lamps, discharge tubes, and some types of vacuum tube. The other type of cathode is a hot cathode, which is heated by electric current passing through a Electrical filament, filament. A cold cathode does not necessarily operate at a low temperature: it is often heated to its operating temperature by other methods, such as the current passing from the cathode into the gas. Cold-cathode devices A cold-cathode vacuum tube does not rely on external heating of an electrode to provide thermionic emission of electrons. Early cold-cathode devices included the Geissler tube and Julius Plücker, Plucker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZGF Architects LLP
ZGF Architects LLP (ZGF), formerly Zimmer Gunsul Frasca Partnership, is an American architectural firm based in Portland, Oregon Portland ( ) is the List of cities in Oregon, most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette River, Willamette and Columbia River, .... It was founded in 1942 and has seven offices in the United States and Canada. History The company was founded in 1942 in Portland. In July 2009, the company moved into a new headquarters on Southwest 12th Avenue and Washington Street in downtown Portland, from Southwest Third and Oak. Operations , ZGF has offices in Seattle, Los Angeles, Washington D.C., New York City, Denver, and Vancouver B.C., in addition to the headquarters in Portland. The Portland headquarters, the largest architecture firm in Portland, is the largest of the offices, employing about 280 people. Since 2013, the firm's managing p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Final Examination
An examination (exam or evaluation) or test is an educational assessment intended to measure a test-taker's knowledge, skill, aptitude, physical fitness, or classification in many other topics (e.g., beliefs). A test may be administered verbally, on paper, on a computer-adaptive testing, computer, or in a predetermined area that requires a test taker to demonstrate or perform a set of skills. Tests vary in style, rigor and requirements. There is no general consensus or invariable standard for test formats and difficulty. Often, the format and difficulty of the test is dependent upon the educational philosophy of the instructor, subject matter, class size, policy of the educational institution, and requirements of accreditation or governing bodies. A test may be administered formally or informally. An example of an informal test is a reading test administered by a parent to a child. A formal test might be a final examination administered by a teacher in a classroom or an IQ te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
