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KiteGen
KiteGen is a concept for a wind harnessing machine for high altitude winds, developed in Italy. The vertical axis rotation is intended to eliminate the static and dynamic problems that limit the size of conventional wind turbines. The prototype STEM yo-yo is under construction at Berzano di San Pietro in Italy. History The KiteGen was originally conceived by Italian researcher Massimo Ippolito. While observing kite surfers, Ippolito noticed the large amount of energy that the kite could collect and thought that a similar system could produce electricity. This idea seemed so risky that Ippolito put it aside for years. Structure The problem of capturing the wind is solved by the use of Power Wing Profiles (Power kites) whose movements are controlled automatically by a computer. The kites are tied by cables to a structure that rotates, generating electricity. This structure is the turbine, while the kites are the "blades". The kites are flown on a predetermined trajectory, tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airborne Wind Turbine
An airborne wind turbine is a design concept for a wind turbine with a rotor supported in the air without a tower, thus benefiting from the higher velocity and persistence of wind at high altitudes, while avoiding the expense of tower construction, or the need for slip rings or yaw mechanism. An electrical generator may be on the ground or airborne. Challenges include safely suspending and maintaining turbines hundreds of meters off the ground in high winds and storms, transferring the harvested and/or generated power back to earth, and interference with aviation. Airborne wind turbines may operate in low or high altitudes; they are part of a wider class of Airborne Wind Energy Systems (AWES) addressed by high-altitude wind power and crosswind kite power. When the generator is on the ground, then the tethered aircraft need not carry the generator mass or have a conductive tether. When the generator is aloft, then a conductive tether would be used to transmit energy to the gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land border, as well as List of islands of Italy, nearly 800 islands, notably Sicily and Sardinia. Italy shares land borders with France to the west; Switzerland and Austria to the north; Slovenia to the east; and the two enclaves of Vatican City and San Marino. It is the List of European countries by area, tenth-largest country in Europe by area, covering , and the third-most populous member state of the European Union, with nearly 59 million inhabitants. Italy's capital and List of cities in Italy, largest city is Rome; other major cities include Milan, Naples, Turin, Palermo, Bologna, Florence, Genoa, and Venice. The history of Italy goes back to numerous List of ancient peoples of Italy, Italic peoples—notably including the ancient Romans, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truck
A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construction, with a cabin that is independent of the payload portion of the vehicle. Smaller varieties may be mechanically similar to some automobiles. Commercial trucks can be very large and powerful and may be configured to be mounted with specialized equipment, such as in the case of refuse trucks, fire trucks, concrete mixers, and suction excavators. In American English, a commercial vehicle without a trailer or other articulation is formally a "straight truck" while one designed specifically to pull a trailer is not a truck but a " tractor". The majority of trucks currently in use are powered by diesel engines, although small- to medium-size trucks with gasoline engines exist in North America. Electrically powered trucks are more popu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Energy
Wind power is the use of wind energy to generate useful work. Historically, wind power was used by sails, windmills and windpumps, but today it is mostly used to generate electricity. This article deals only with wind power for electricity generation. Today, wind power is generated almost completely using wind turbines, generally grouped into wind farms and connected to the electrical grid. In 2024, wind supplied over 2,494 TWh of electricity, which was 8.1% of world electricity. With about 100 GW added during 2021, mostly in China and the United States, global installed wind power capacity exceeded 800 GW. 30 countries generated more than a tenth of their electricity from wind power in 2024 and wind generation has nearly tripled since 2015. To help meet the Paris Agreement goals to limit climate change, analysts say it should expand much faster – by over 1% of electricity generation per year. Wind power is considered a sustainable, renewable energy source, and has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sardinia
Sardinia ( ; ; ) is the Mediterranean islands#By area, second-largest island in the Mediterranean Sea, after Sicily, and one of the Regions of Italy, twenty regions of Italy. It is located west of the Italian Peninsula, north of Tunisia and 16.45 km south of the French island of Corsica. It has over 1.5 million inhabitants as of 2025. It is one of the five Italian regions with some degree of Autonomous administrative division, domestic autonomy being granted by a Regions of Italy#Autonomous regions with special statute, special statute. Its official name, Autonomous Region of Sardinia, is bilingual in Italian language, Italian and Sardinian language, Sardinian: / . It is divided into four provinces of Italy, provinces and a Metropolitan cities of Italy, metropolitan city. Its capital (and largest city) is Cagliari. Sardinia's indigenous language and Algherese dialect, Algherese Catalan language, Catalan are referred to by both the regional and national law as two of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Power Plant
A coal-fired power station or coal power plant is a thermal power station which burns coal to generate electricity. Worldwide there are about 2,500 coal-fired power stations, on average capable of generating a gigawatt each. They generate about a third of the world's electricity, but cause many illnesses and the most early deaths per unit of energy produced, mainly from air pollution. World installed capacity doubled from 2000 to 2023 and increased 2% in 2023. A coal-fired power station is a type of fossil fuel power station. The coal is usually pulverized and then burned in a pulverized coal-fired boiler. The furnace heat converts boiler water to steam, which is then used to spin turbines that turn generators. Thus chemical energy stored in coal is converted successively into thermal energy, mechanical energy and, finally, electrical energy. Coal-fired power stations are the largest single contributor to climate change, releasing approximately 12 billion tonnes o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulcis
Sulcis (''Maurreddia'' or ''Meurreddia'' in Sardinian language) is a subregion of Sardinia, Italy, in the Province of South Sardinia. Languages spoken include Italian, Sardinian ( Campidanesu) and Ligurian (Tabarchino). Geographical extension Its municipalities are: Calasetta, Carbonia, Carloforte, Giba, Gonnesa, Masainas, Narcao, Nuxis, Perdaxius, Piscinas, Portoscuso, San Giovanni Suergiu, Santadi, Sant'Anna Arresi, Sant'Antioco, Tratalias, Villaperuccio, Teulada. Part of the region are also the islands of San Pietro and Sant'Antioco. Today the term "Lower Sulcis" is used to indicate the municipalities that belonged to the old Curatoria of Sulcis (without the Cixerri valley) and, sometimes, it is erroneously attributed to the towns of Pula, Villa San Pietro, Sarroch and Domus de Maria, which never belonged to the territory of ancient Sulci but rather to that of Nora, never belonged to the diocese of Sulci but always to that of Cagliari and, in the Mid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Aid
State aid in the European Union is the name given to a subsidy or any other aid provided by a government that distorts competition. Under European Union competition law, the term has a legal meaning, being any measure that demonstrates any of the characteristics in Article 107 of the Treaty on the Functioning of the European Union, in that if it distorts competition or the free market, it is classified by the European Union as illegal state aid. Measures that fall within the definition of state aid are considered unlawful unless provided under an exemption or notified by the European Commission. In 2019, the EU member states provided state aid corresponding to 0.81% of the bloc's GDP. EU policy on state aid The Treaty on the Functioning of the European Union (Art. 107, para. 1) reads: "Save as otherwise provided in this Treaty, any aid granted by a Member State or through State resources in any form whatsoever which distorts or threatens to distort competition by favouring cer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glencore
Glencore plc is an Anglo-Swiss Multinational corporation, multinational commodity trading and mining company with headquarters in Baar, Switzerland, Baar, Switzerland. Glencore's oil and gas headquarters are in London, London, England as well as its primary listing being on the London Stock Exchange, and it is one of the largest components of the FTSE 100 Index, FTSE 100 by market capitalization. Its registered office is in Saint Helier, Jersey, a Crown Dependencies, Crown Dependency of the United Kingdom. By some estimates, it is the world's largest commodity trader, and among the world's largest companies. The company was formed in 1994 by a management buyout of Marc Rich + Co AG (itself founded in 1974). The company merged with Xstrata in 2013, increasing its size substantially. Before that, the company was already one of the world's largest integrated producers and marketers of commodities. It was the largest company in Switzerland as well as the world's largest commodities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Availability (system)
Availability is the probability that a system will work as required when required during the period of a mission. The mission could be the 18-hour span of an aircraft flight. The mission period could also be the 3 to 15-month span of a military deployment. Availability includes non-operational periods associated with reliability, maintenance, and logistics. This is measured in terms of nines. Five-9's (99.999%) means less than 5 minutes when the system is not operating correctly over the span of one year. Availability is only meaningful for supportable systems. As an example, availability of 99.9% means nothing after the only known source stops manufacturing a critical replacement part. Definition There are two kinds of availability. * Operational * Predicted Operational availability is presumed to be the same as predicted availability until after operational metrics become available. Availability Operational availability is based on observations after at least one system h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portoscuso
Portoscuso (Portescusi in Sardinian) is a ''comune'' (municipality) in the Province of South Sardinia in the Italian region Sardinia, located about west of Cagliari and about northwest of Carbonia. The languages used here are Italian and Sardinian Campidanese. Portoscuso borders the following municipalities: Carbonia, Gonnesa, and San Giovanni Suergiu. History Human presence in this territory dates back to Neolithic times. Bronze Age sites include the ruins of several Nuraghe (e.g. Baccu Ollasta) and the rock shelter of Punta Niedda, where the bones of 6 individuals and various objects of the Bonnanaro culture were recovered in the 1940s. The area was then frequented by the Phoenicians, followed by the Punics and the Romans of whose passage some evidence remains, in particular regarding the funerary aspect, with the necropolises in the San Giorgio and Piccinu Mortu areas. In the Middle Age this territory, as the rest of the Sulcis region, was part of the Giudicato of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ALCOA
Alcoa Corporation (an acronym for "Aluminum Company of America") is an American industrial corporation. It is the world's eighth-largest producer of aluminum. Alcoa conducts operations in 10 countries. Alcoa is a major producer of primary aluminum, fabricated aluminum, and alumina combined, through its active and growing participation in all major aspects of the industry: technology, mining, refining, smelting, fabricating, and recycling. Alcoa emerged in 1888 as the brainchild of Charles Martin Hall, with the funding of Alfred E. Hunt and Arthur Vining Davis. Alcoa was the first mass producer of aluminum. Before Alcoa's formation, aluminum was difficult to refine and, as a result, was more expensive than silver or gold. In 1886, Hall discovered the Hall–Héroult process, the first inexpensive technique for refining aluminum, drastically reducing the price of aluminum while increasing its availability. Hall approached Hunt and Davis to form a company to bring his process to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
