Harbor

A harbor or harbour (see spelling differences), or haven, is a body of water where ships, boats and barges seek shelter from stormy weather, or are stored for future use. Harbors and ports are often confused with each other. A port is a facility for loading and unloading vessels; ports are often located in harbors.

Harbors can be natural or artificial. An artificial harbor can have deliberately constructed breakwaters, sea walls, or jettys, or they can be constructed by dredging, which requires maintenance by further periodic dredging. An example of an artificial harbor is Long Beach Harbor, California, which was an array of salt marshes and tidal flats too shallow for modern merchant ships before it was first dredged in the early 20th century.

In contrast, a natural harbor is surrounded on several sides by prominences of land. Examples of natural harbors include Sydney Harbour, Australia and San Francisco Bay, California.

Artificial harbors

Artificial harbors are frequently built for use as ports. The oldest artificial harbor known is the Ancient Egyptian site at Wadi al-Jarf, on the Red Sea coast, which is at least 4500 years old (ca. 2600-2550 BC, reign of King Khufu). The largest artificially created harbor is Jebel Ali in Dubai. Other large and busy artificial harbors include:

Skyline

A skyline is the horizon created by a city's overall structure, or by human intervention in a non-urban setting or in nature. City skylines serve as a kind of fingerprint as no two skylines are alike. For this reason, news and sports programs, television shows, and movies often display the skyline of a city to set a location. The term The Sky Line of New York City was first introduced in 1896, when it was the title of a color lithograph by Charles Graham for the color supplement of the New York Journal.

Paul D. Spreiregen, FAIA, has called a skyline "a physical representation [of a city's] facts of life ... a potential work of art ... its collective vista."

History

Early examples

The Colosseum in Rome

The Colosseum in Rome

Gizah pyramids

Gizah pyramids

Acropolis

Acropolis

Stonehenge's skyline has been known for millennia.

Stonehenge's skyline has been known for millennia.

Historic buildings in Toledo, Spain have been part of the city skyline for many years.

Skyline Drive

Skyline Drive is a 109-mile (175 km) road that runs the entire length of the National Park Service's Shenandoah National Park in the Blue Ridge Mountains of Virginia, generally along the ridge of the mountains. The scenic drive is particularly popular in the fall when the leaves are changing colors. Annually, over two million people visit the Skyline Drive, which has been designated a National Scenic Byway.

Entry

Major entry points to Skyline Drive are as follows:

Fees are collected at the Skyline Drive's access points. The fee varies based on the season. Passes, which are valid for unlimited entries within a seven-day period, are issued. Since user fees are charged at entry points along the Skyline Drive, the Drive is sometimes mistaken for a toll road. The fee, however, is not a toll charged to drive on the road, but rather an entry fee for the park itself. A $20.00 pass is valid for up to seven days and $40.00 for a year-long pass.

San Diego

San Diego /ˌsæn diːˈeɪɡoʊ/ (Spanish for "Saint Didacus") is a major city in California, on the coast of the Pacific Ocean in Southern California, approximately 120 miles (190 km) south of Los Angeles and immediately adjacent to the border with Mexico.

With an estimated population of 1,381,069 as of July 1, 2014, San Diego is the eighth-largest city in the United States and second-largest in California. San Diego is the birthplace of California and is known for its mild year-round climate, natural deep-water harbor, extensive beaches, long association with the U.S. Navy, and recent emergence as a healthcare and biotechnology development center.

Historically home to the Kumeyaay people, San Diego was the first site visited by Europeans on what is now the West Coast of the United States. Upon landing in San Diego Bay in 1542, Juan Rodríguez Cabrillo claimed the entire area for Spain, forming the basis for the settlement of Alta California 200 years later. The Presidio and Mission of San Diego, founded in 1769, formed the first European settlement in what is now California. In 1821, San Diego became part of newly independent Mexico, and in 1850, became part of the United States following the Mexican–American War and the admission of California to the union.

Video

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media.

Video systems vary greatly in the resolution of the display, how they are refreshed, and the rate of refreshed, and 3D video systems exist. They can also be carried on a variety of media, including radio broadcast, tapes, DVDs, computer files etc.

History

Video technology was first developed for Mechanical television systems, which were quickly replaced by cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Charles Ginsburg led an Ampex research team developing one of the first practical video tape recorder (VTR). In 1951 the first video tape recorder captured live images from television cameras by converting the camera's electrical impulses and saving the information onto magnetic video tape.

Video recorders were sold for $50,000 in 1956, and videotapes cost $300 per one-hour reel. However, prices gradually dropped over the years; in 1971, Sony began selling videocassette recorder (VCR) decks and tapes to the public.