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Fish Doorbell
A fish doorbell (Dutch: ''visdeurbel'') is a system that allows fish to pass through a closed sluice gate through crowdsourced input when fish are present. The Utrecht Visdeurbel uses a livestreamed underwater camera that allows users to press a doorbell button to notify the lock operator that there are fish swimming in the gracht ''Gracht'' (; plural: ''grachten'') is a Dutch word for a canal within a city. ''Grachten'' often have a round shape, and form a circle around the city cores in the Netherlands, Belgium, and northern Germany. Outside the Netherlands, the word '' ..., and that the lock should be opened. It is designed to aid in seasonal fish migration, as an alternative to a physical fish ladder. Usage It was deployed for the first time in Utrecht in March 2021, at the ''Weerdsluis'' on the Oudegracht. In the first two weeks, it was used 23,000 times. It was disabled in June, but has since been reinstated avisdeurbel.nl References {{Reflist External lin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sluice
Sluice ( ) is a word for a channel controlled at its head by a movable gate which is called a sluice gate. A sluice gate is traditionally a wood or metal barrier sliding in grooves that are set in the sides of the waterway and can be considered as a bottom opening in a wall. Sluice gates are one of the most common hydraulic structures in controlling flow rate and water level in open channels such as rivers and canals. They also could be used to measure the flow. A water channel containing a sluice gate forms a type of lock to manage the water flow and water level. It can also be an open channel which processes material, such as a River Sluice used in gold prospecting or fossicking. A mill race, leet, flume, penstock or lade is a sluice channeling water toward a water mill. The terms sluice, sluice gate, knife gate, and slide gate are used interchangeably in the water and wastewater control industry. They are also used in wastewater treatment plants and to recover minerals in minin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crowdsourcing
Crowdsourcing involves a large group of dispersed participants contributing or producing goods or services—including ideas, votes, micro-tasks, and finances—for payment or as volunteers. Contemporary crowdsourcing often involves digital platforms to attract and divide work between participants to achieve a cumulative result. Crowdsourcing is not limited to online activity, however, and there are various historical examples of crowdsourcing. The word crowdsourcing is a portmanteau of "crowd" and " outsourcing". In contrast to outsourcing, crowdsourcing usually involves less specific and more public groups of participants. Advantages of using crowdsourcing include lowered costs, improved speed, improved quality, increased flexibility, and/or increased scalability of the work, as well as promoting diversity. Crowdsourcing methods include competitions, virtual labor markets, open online collaboration and data donation. Some forms of crowdsourcing, such as in "idea competiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utrecht
Utrecht ( , , ) is the List of cities in the Netherlands by province, fourth-largest city and a List of municipalities of the Netherlands, municipality of the Netherlands, capital and most populous city of the Provinces of the Netherlands, province of Utrecht (province), Utrecht. It is located in the eastern corner of the Randstad conurbation, in the very centre of mainland Netherlands, about 35 km south east of the capital Amsterdam and 45 km north east of Rotterdam. It has a population of 361,966 as of 1 December 2021. Utrecht's ancient city centre features many buildings and structures, several dating as far back as the High Middle Ages. It has been the religious centre of the Netherlands since the 8th century. It was the most important city in the Netherlands until the Dutch Golden Age, when it was surpassed by Amsterdam as the country's cultural centre and most populous city. Utrecht is home to Utrecht University, the largest university in the Netherlands, as well as seve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Livestreaming
Livestreaming is streaming media simultaneously recorded and broadcast in real-time over the internet. It is often referred to simply as streaming. Non-live media such as video-on-demand, vlogs, and YouTube videos are technically streamed, but not live-streamed. Livestream services encompass a wide variety of topics, from social media to video games to professional sports. Platforms such as Facebook Live, Periscope, Kuaishou, Douyu, bilibili and 17 include the streaming of scheduled promotions and celebrity events as well as streaming between users, as in videotelephony. Sites such as Twitch have become popular outlets for watching people play video games, such as in esports, Let's Play-style gaming, or speedrunning. Live coverage of sporting events is a common application. User interaction via chat rooms forms a major component of livestreaming. Platforms often include the ability to talk to the broadcaster or participate in conversations in chat. Many chat rooms also consist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doorbell
A doorbell is a signaling device typically placed near a door to a building's entrance. When a visitor presses a button, the bell rings inside the building, alerting the occupant to the presence of the visitor. Although the first doorbells were mechanical, activated by pulling a cord connected to a bell, modern doorbells are electric, operated by a pushbutton switch. Modern doorbells often incorporate intercoms and miniature video cameras to increase security. History William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. A precursor to the electric doorbell, specifically a bell that could be rung at a distance via an electric wire, was invented by Joseph Henry around 1831. By the early 1900s, electric doorbells had become commonplace. Wired doorbells In most wired systems, a button on the outside next to the door, locate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock (water Navigation)
A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson) that rises and falls. Locks are used to make a river more easily navigable, or to allow a canal to cross land that is not level. Later canals used more and larger locks to allow a more direct route to be taken. Pound lock A ''pound lock'' is most commonly used on canals and rivers today. A pound lock has a chamber with gates at both ends that control the level of water in the pound. In contrast, an earlier design with a single gate was known as a flash lock. Pound locks were first used in China during the Song Dynasty (960–1279 AD), having been pioneered by the Song politician and naval ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracht
''Gracht'' (; plural: ''grachten'') is a Dutch word for a canal within a city. ''Grachten'' often have a round shape, and form a circle around the city cores in the Netherlands, Belgium, and northern Germany. Outside the Netherlands, the word ''grachten'' mostly refers to the city canals of Amsterdam (for which it is well known) and also Utrecht, Leiden and The Hague. The Koninginnegracht in The Hague was conceived by King Willem I for the promotion of tourism in the early 19th century. Since 2009 the Willemsvaart once more offers tours over this ''gracht'', to Scheveningen, known as "StrandRelax" or "BeachRelax", a unique stretch of sand between The Hague and the sea. Translation The word ''gracht'' cannot be easily translated; for this reason, it is necessary to distinguish between four related terms: * A ' (city-canal) is a waterway in the city with one-way streets on both sides of the water. The streets are lined with houses, often in a closed front. In rare cases, there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GoodNewsNetwork
The Good News Network is an American online newspaper which publishes positive news stories. Overview The website was launched in 1997 by Geri Weis-Corbley in order to publish uplifting news gathered from sources around the world. Its purpose is to share positive and encouraging stories, as well as breakthroughs in technology and health. Weis-Corbley says that it is a "clearinghouse for the gathering and dissemination of positive, compelling new stories," to promote a well-balanced perspective. In an article about Weis-Corbley, Tal Ben-Shahar, an expert on positive psychology and Harvard University lecturer, said that our perception of the world is warped by continual viewing of bad news. "While the media focuses on a small number of frauds—which it should certainly report on—it entirely ignores the millions or billions of honest transactions that take place every day... Too many people, assisted by the media bias, extrapolate from a few cases of people hurting others that h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Ladder
A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movements of potamodromous species. Most fishways enable fish to pass around the barriers by swimming and leaping up a series of relatively low steps (hence the term ''ladder'') into the waters on the other side. The velocity of water falling over the steps has to be great enough to attract the fish to the ladder, but it cannot be so great that it washes fish back downstream or exhausts them to the point of inability to continue their journey upriver. History Written reports of rough fishways date to 17th-century France, where bundles of branches were used to make steps in steep channels to bypass obstructions. A pool and weir salmon ladder was built around 1830 by James Smith, a Scottish engineer on the River Teith, near Deanston, Perthshire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algemeen Dagblad
The ''Algemeen Dagblad'' () or ''AD'' () (English: "General Daily Paper") is a Dutch daily newspaper based in Rotterdam, Netherlands. History and profile ''Algemeen Dagblad'' was founded in 1946. The paper is published in tabloid format and is headquartered in Rotterdam. Its regional focus includes the cities and regions around Rotterdam, Utrecht and The Hague. ''AD Rotterdams Dagblad'' * ''Goudsche Courant'' -> ''AD Groene Hart'' * ''Rijn & Gouwe'' -> ''AD Groene Hart'' * ''Haagsche Courant'' -> ''AD Haagsche Courant'' * ''Utrechts Nieuwsblad'' -> ''AD Utrechts Nieuwsblad'' * ''Amersfoortsche Courant'' -> ''AD Amersfoortsche Courant'' * ''De Dordtenaar -> ''AD De Dordtenaar'' * ''Dagblad Rivierenland'' -> ''AD Rivierenland'' Chief editors Het Vaderland ''Het Vaderland'' was an independent newspaper founded in the Hague in 1869. In 1972, it became a regional supplement of Algemeen Dagblad for The Hague. In 1982, the newspaper was dissolved. Circulation In the period of 199 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trouw
''Trouw'' (; ) is a Dutch daily newspaper appearing in compact size. It was founded in 1943 as an orthodox Protestant underground newspaper during World War II. Since 2009, it has been owned by DPG Media (known as De Persgroep until 2019). ''Trouw'' received the European Newspaper Award in 2012. Cees van der Laan is the current editor-in-chief. History ''Trouw'' is a Dutch word meaning "fidelity", "loyalty", or "allegiance", and is cognate with the English adjective "true". The name was chosen to reflect allegiance and loyalty to God and Country in spite of the German occupation of the Netherlands. ''Trouw'' was started during World War II by members of the Dutch Protestant resistance. Hundreds of people involved in the production and distribution of the newspaper were arrested and killed during the war. The newspaper was published irregularly during the war due to lack of paper. In 1944 the Nazi occupying forces tried to stop publication by rounding up and imprisoning some 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oudegracht
The Oudegracht, or "old canal", runs through the center of Utrecht, the Netherlands. It starts in the southeast of the city. Here the Kromme Rijn (the original main bed of the Rhine river) and the Vaartse Rijn (a medieval canal reconnecting Utrecht to the newer main stream of the Rhine, the Lek) arrive to meet the original moat of the fortified town, and the Oudegracht goes from there into the center of town. Parts of the Oudegracht follow the original flow of the river Rhine, but there is some disagreement on what parts. The northern part is most likely an early canal (app. 1000) connecting the Rhine section to the river Vecht. The southern part was started in 1122, after the water level of the Rhine in Utrecht dropped because of the new dam at Wijk bij Duurstede. The ground excavated was used to raise the sides of the canal, to reduce the chance of flooding. When the city's system of locks was finished in 1275 the water level was constant, enabling the creation of permanently dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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