Tidal stream power is electricity made from the tidal movement of water. A tidal stream generator is a machine that extracts energy from moving water in tides. Tidal stream generators draw energy from water currents in much the same way as wind turbines draw energy from air currents.
Tidal stream power is the cheapest and the least ecologically damaging among the three main forms of tidal power generation.
Tidal stream power is a relatively new technology. It was first conceived in the 1970s during the oil crisis.
The potential for power generation by an individual tidal turbine can be greater than that of similarly rated wind energy turbine. Water is about 800 times the density of air. So, water pushing against a turbine can provide much more power than air pushing against a similar turbine at the same speed. Also, the lowest water speeds needed for an economic power project is lower than the wind speed needed for a wind turbine project. In practice, the tide must move at speeds of at least 2 knots (1 m/s) even close to neap tides to be a source of power.
As with wind power, selection of location is critical for the tidal turbine. Tidal stream systems need to be located in areas with fast currents where natural flows are concentrated between obstructions, for example at the entrances to bays and rivers, around rocky points, headlands, or between islands or other land masses.
The main concern has been whether the turbines kill fish. Very little direct environmental research or observation of tidal stream systems exists. Most direct observations consist of releasing tagged fish upstream of the device(s) and direct observation of mortality or impact on the fish.
One study of the Roosevelt Island Tidal Energy (RITE, Verdant Power) project in the East River (New York City), utilized 24 split beam hydroacoustic sensors (scientific echosounder) to detect and track the movement of fish both upstream and downstream of each of six turbines. The results suggested (1) very few fish using this portion of the river, (2) those fish which did use this area were not using the portion of the river which would subject them to blade strikes, and (3) no evidence of fish traveling through blade areas.
Work is currently being conducted by the Northwest National Marine Renewable Energy Center (NNMREC) to explore and establish tools and protocols for assessment of physical and biological conditions and monitor environmental changes associated with tidal energy development.
Cliff-dwelling
Cliff-dwelling was living in cave on a cliff or a niche. It was often done by the Ancient Americans. Those who did this were called cliff-dwellers.
Patty Smyth
Patty Smyth (born June 26, 1957 in New York City) is an American rock and roll singer. She first had success as lead singer of the group Scandal. Her solo hit songs include "Sometimes Love Just Ain't Enough".
Ohio County, West Virginia
Ohio County is a county in West Virginia. It was created in 1776. It was named for the Ohio River which forms its western border. West Liberty (formerly Black's Cabin) was the county seat from 1777 to 1797. The city of Wheeling, West Virginia has been the county seat since then. As of 2010, 44,443 people lived there.
Ohio County is part of the Wheeling, West Virginia metropolitan area.
Ohio County is one of four US counties to border the state with whom it shares its name (the others are Nevada County, California, Texas County, Oklahoma, and Delaware County, Pennsylvania).
U.S. Route 250
U.S. Route 250 (US 250) is a route of the United States Numbered Highway System. It is a spur of U.S. Route 50. It runs for from Sandusky, Ohio to Richmond, Virginia. It passes through the states of Virginia, West Virginia, and Ohio. The road goes through the cities of Richmond, Virginia, Charlottesville, Virginia, Staunton, Virginia, and Wheeling, West Virginia. US 250 intersects and forms a short overlap with its parent US 50 west of Pruntytown, West Virginia. In West Virginia, the route is signed north–south. In Ohio and Virginia, the route is signed east–west.
Pope Pius IV
Pope Pius IV (; 31 March 1499 – 9 December 1565), born Giovanni Angelo Medici, was an Italian priest of the Roman Catholic Church and the 225th Pope from 1559 to 1565.
Giovanni Angelo Medici was born in Milan. He was not closely related to the Medicis of Florence.
He studied at University of Pavia and the University of Bologna where he earned a law degree.
In 1527, Medici went to Rome where he joined the church bureaucracy.
In 1549, Pope Paul III made Medici a cardinal. Pope Leo III sent him on diplomatic missions to Germany and to Hungary.
During the reign of Pope Paul IV, Cardinal Medici was out of favor.
Cardinal Medici was elected Pope on 25 December 1559.
In the context of the Counter-Reformation, this pope moderated the Inquisition in Italy.
Pope Paul III presided over the last session of the Council of Trent which was the major event of his papacy.
In part, the Tridentine Creed reflects the thinking of church leaders at the Council of Trent.
After his death in 1565, the body of Pope Pius IV was entombed at the church of Santa Maria degli Angeli.
Functional programming
Functional programming is a programming paradigm where values are passed around into functions, and those functions are themselves values. Functional programmers often try to make large parts of their code referentially transparent.
Darlene Love
Darlene Wright, better known as Darlene Love, (born July 26, 1941) is an American pop rock singer and actress. She was born in Los Angeles. She became well known in the 1960s with many hit songs. She has also acted in movies and many television programs.
JSON
JSON (JavaScript Object Notation) is a way of expressing information. JSON is usually easy to understand. It can express information like XML. It is based on JavaScript's notation for object literals. However, JSON is stricter.
JSON and XML are both often used in AJAX. Even though JSON is named after JavaScript, it can be used in other programming languages, such as Python (, etc.)
This is an example of JSON:
JSON Encoding and Decoding in Python
Encoding:
Decoding:
Baby, It's Cold Outside
"Baby, It's Cold Outside" is a 1944 song. Frank Loesser wrote the words. This song was sold to MGM. The song does not mention any holiday, but it is regarded as a Christmas song because of the lyrics' depiction of a snowy backdrop. The song is often heard on radio at Christmas time. It has been recorded by multiple musicians, including Dean Martin, Ray Charles and Barry Manilow.
Mesa, Colorado
Mesa is a town in Colorado. It has a cemetery.
Mario Kart 7
Mario Kart 7 (also called MK7 and originally called Mario Kart 3DS) is a Nintendo 3DS racing game released on December 1, 2011. It is the seventh main game in the series. The game as additions, including hang-gliding attachments on karts and driving underwater. The player is able to customize their karts. Metal Mario, Lakitu, Wiggler, and Honey Queen appeared as playable characters.
I Saw Mommy Kissing Santa Claus
"I Saw Mommy Kissing Santa Claus" is a Christmas song with words and music by British songwriter Tommie Connor. The original recording by 13-year-old Jimmy Boyd rose to #1 on the "Billboard" charts in December 1952. The words tell of a child who sees Mommy kissing Santa Claus underneath the mistletoe.
The Roman Catholic Church in Boston hated the song because it is a Christmas song that also mentions sex. Radio stations in several markets banned it. Boyd went to church leaders to talk about the words. The ban on the song was lifted.
The song has been performed by various musicians, including but not limited to the Ronettes, Jackson 5, Jessica Simpson, John Mellencamp, Amy Winehouse and other singers throughout the years.
The Ronettes
The Ronettes were an American girl group. They were based in New York City and were popular in the 1960s. The girls began singing as adolescents around Spanish Harlem in 1959.