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89-662: The € 480.1- million satellite was launched on 17 November 1995 from the ELA-2 launch pad at the Guiana Space Centre near Kourou in French Guiana. The launch vehicle , an Ariane 4 4P rocket, placed ISO successfully into a highly elliptical geocentric orbit , completing one revolution around the Earth every 24 hours. The primary mirror of its Ritchey-Chrétien telescope measured 60 cm in diameter and

178-535: A common side showing the denomination or value, and a map in the background. Due to the linguistic plurality in the European Union , the Latin alphabet version of euro is used (as opposed to the less common Greek or Cyrillic) and Arabic numerals (other text is used on national sides in national languages, but other text on the common side is avoided). For the denominations except the 1-, 2- and 5-cent coins,

267-432: A mass-production basis, which limited them to a number of specialised applications. The MOSFET was invented at Bell Labs between 1955 and 1960. It was the first truly compact transistor that could be miniaturised and mass-produced for a wide range of uses. Its advantages include high scalability , affordability, low power consumption, and high density . It revolutionized the electronics industry , becoming

356-610: A national side showing an image specifically chosen by the country that issued the coin. Euro coins from any member state may be freely used in any nation that has adopted the euro. The coins are issued in denominations of €2 , €1 , 50c , 20c , 10c , 5c , 2c , and 1c . To avoid the use of the two smallest coins, some cash transactions are rounded to the nearest five cents in the Netherlands and Ireland (by voluntary agreement) and in Finland and Italy (by law). This practice

445-403: A radio antenna , practicable. Vacuum tubes (thermionic valves) were the first active electronic components which controlled current flow by influencing the flow of individual electrons , and enabled the construction of equipment that used current amplification and rectification to give us radio , television , radar , long-distance telephony and much more. The early growth of electronics

534-400: A toroidal tank loaded with 2268 litres of superfluid helium. Cooling by slow evaporation of the helium kept the temperature of the telescope below 3.4 K and the science instruments below 1.9 K. These very low temperatures were required for the scientific instruments to be sensitive enough to detect the small amount of infrared radiation from cosmic sources. Without this extreme cooling,

623-612: A budget deficit of less than 3% of their GDP, a debt ratio of less than 60% of GDP (both of which were ultimately widely flouted after introduction), low inflation, and interest rates close to the EU average. In the Maastricht Treaty, the United Kingdom and Denmark were granted exemptions per their request from moving to the stage of monetary union which resulted in the introduction of the euro (see also United Kingdom and

712-558: A foreign trading currency in Cuba since 1998, Syria since 2006, and Venezuela since 2018. In 2009, Zimbabwe abandoned its local currency and introduced major global convertible currencies instead, including the euro and the United States dollar. The direct usage of the euro outside of the official framework of the EU affects nearly 3 million people. Outside the eurozone, two EU member states have currencies that are pegged to

801-418: A leading role in the field of microwave and high power transmission as well as television receivers until the middle of the 1980s. Since then, solid-state devices have all but completely taken over. Vacuum tubes are still used in some specialist applications such as high power RF amplifiers , cathode-ray tubes , specialist audio equipment, guitar amplifiers and some microwave devices . In April 1955,

890-566: A mix of the two types. Analog circuits are becoming less common, as many of their functions are being digitized. Analog circuits use a continuous range of voltage or current for signal processing, as opposed to the discrete levels used in digital circuits. Analog circuits were common throughout an electronic device in the early years in devices such as radio receivers and transmitters. Analog electronic computers were valuable for solving problems with continuous variables until digital processing advanced. As semiconductor technology developed, many of

979-504: A monetary agreement: British Overseas Territory : Unilateral adopters: The following EU member states committed themselves in their respective Treaty of Accession to adopt the euro. However they do not have a deadline to do so and can delay the process by deliberately not complying with the convergence criteria (such as by not meeting the convergence criteria to join ERM II). Bulgaria and Romania are actively working to adopt

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1068-540: A physical space, although in more recent years the trend has been towards electronics lab simulation software , such as CircuitLogix , Multisim , and PSpice . Today's electronics engineers have the ability to design circuits using premanufactured building blocks such as power supplies , semiconductors (i.e. semiconductor devices, such as transistors), and integrated circuits. Electronic design automation software programs include schematic capture programs and printed circuit board design programs. Popular names in

1157-405: A quadrant star sensor on the telescope axis, gyroscopes and reaction wheels . A complementary reaction control system (RCS), using hydrazine propellant , was responsible for orbital direction and finetuning shortly after launch . The complete satellite weighed just under 2500 kg, was 5.3 m high, 3.6 m wide and measured 2.3 m in depth. The service module held all the warm electronics ,

1246-499: A rise in temperature of the telescope. This was a clear sign that the load of superfluid helium coolant had depleted. At 23:07 UTC the same day, the temperature of the science instruments had risen above 4.2 K and science observations were ceased. A few detectors in the SWS instrument were capable of making observations at higher temperatures and remained in use for another 150 hours to make detailed measurements of an additional 300 stars . In

1335-598: Is a major donor to the EFSF. To be included in the eurozone, countries had to fulfil certain convergence criteria , but the meaningfulness of such criteria was diminished by the fact it was not enforced with the same level of strictness among countries. According to the Economist Intelligence Unit in 2011, "[I]f the [euro area] is treated as a single entity, its [economic and fiscal] position looks no worse and in some respects, rather better than that of

1424-542: Is also the sole currency in three overseas territories of France that are not themselves part of the EU, namely Saint Barthélemy , Saint Pierre and Miquelon , and the French Southern and Antarctic Lands , as well as in the British Overseas Territory of Akrotiri and Dhekelia . The euro has been adopted unilaterally as the sole currency of Montenegro and Kosovo. It has also been used as

1513-548: Is defined as unwanted disturbances superposed on a useful signal that tend to obscure its information content. Noise is not the same as signal distortion caused by a circuit. Noise is associated with all electronic circuits. Noise may be electromagnetically or thermally generated, which can be decreased by lowering the operating temperature of the circuit. Other types of noise, such as shot noise cannot be removed as they are due to limitations in physical properties. Many different methods of connecting components have been used over

1602-469: Is discouraged by the commission, as is the practice of certain shops of refusing to accept high-value euro notes. Commemorative coins with €2 face value have been issued with changes to the design of the national side of the coin. These include both commonly issued coins, such as the €2 commemorative coin for the fiftieth anniversary of the signing of the Treaty of Rome, and nationally issued coins, such as

1691-595: Is the voltage comparator which receives a continuous range of voltage but only outputs one of two levels as in a digital circuit. Similarly, an overdriven transistor amplifier can take on the characteristics of a controlled switch , having essentially two levels of output. Analog circuits are still widely used for signal amplification, such as in the entertainment industry, and conditioning signals from analog sensors, such as in industrial measurement and control. Digital circuits are electric circuits based on discrete voltage levels. Digital circuits use Boolean algebra and are

1780-448: Is therefore the process of defining and developing complex electronic devices to satisfy specified requirements of the user. Due to the complex nature of electronics theory, laboratory experimentation is an important part of the development of electronic devices. These experiments are used to test or verify the engineer's design and detect errors. Historically, electronics labs have consisted of electronics devices and equipment located in

1869-624: The IBM 608 was the first IBM product to use transistor circuits without any vacuum tubes and is believed to be the first all-transistorized calculator to be manufactured for the commercial market. The 608 contained more than 3,000 germanium transistors. Thomas J. Watson Jr. ordered all future IBM products to use transistors in their design. From that time on transistors were almost exclusively used for computer logic circuits and peripheral devices. However, early junction transistors were relatively bulky devices that were difficult to manufacture on

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1958-603: The dobra of São Tomé and Príncipe was officially linked with the euro. Additionally, the Moroccan dirham is tied to a basket of currencies, including the euro and the US dollar, with the euro given the highest weighting. These countries generally had previously implemented a currency peg to one of the major European currencies (e.g. the French franc , Deutsche Mark or Portuguese escudo ), and when these currencies were replaced by

2047-459: The electron in 1897 by Sir Joseph John Thomson , along with the subsequent invention of the vacuum tube which could amplify and rectify small electrical signals , inaugurated the field of electronics and the electron age. Practical applications started with the invention of the diode by Ambrose Fleming and the triode by Lee De Forest in the early 1900s, which made the detection of small electrical voltages, such as radio signals from

2136-550: The orbit was fine-tuned and all satellite systems were activated and tested. Cool-down of the cryostat proved to be more efficient than previously calculated, so the anticipated mission length was extended to 24 months. Between 21 and 26 November all four science instruments were switched on and thoroughly checked out. Between 9 December 1995 and 3 February 1996 the 'Performance Verification Phase' took place, dedicated to commissioning all instruments and fixing problems. Routine observations started from 4 February 1996, and lasted until

2225-501: The satellite started in 1986 with Aérospatiale 's space division (currently absorbed into Thales Alenia Space ) leading an international consortium of 32 companies responsible for manufacture , integration and testing of the new satellite. Final assembly took place at the Cannes Mandelieu Space Center . The basic design of ISO was strongly influenced by that of its immediate predecessor. Like IRAS, ISO

2314-507: The " eurozone ", some 347 million people in total as of 2023 . According to bilateral agreements with the EU , the euro has also been designated as the sole and official currency in a further four European microstates awarded minting rights (Andorra, Monaco, San Marino and the Vatican City). All but one (Denmark) current, and any potential future EU members, are obliged to adopt the euro when economic conditions permit. The euro

2403-448: The 1960s, U.S. manufacturers were unable to compete with Japanese companies such as Sony and Hitachi who could produce high-quality goods at lower prices. By the 1980s, however, U.S. manufacturers became the world leaders in semiconductor development and assembly. However, during the 1990s and subsequently, the industry shifted overwhelmingly to East Asia (a process begun with the initial movement of microchip mass-production there in

2492-475: The 1970s), as plentiful, cheap labor, and increasing technological sophistication, became widely available there. Over three decades, the United States' global share of semiconductor manufacturing capacity fell, from 37% in 1990, to 12% in 2022. America's pre-eminent semiconductor manufacturer, Intel Corporation , fell far behind its subcontractor Taiwan Semiconductor Manufacturing Company (TSMC) in manufacturing technology. By that time, Taiwan had become

2581-421: The 20 arc-minute field of view of the telescope. Thus, pointing of a different instrument to the same cosmic object meant repointing the entire ISO satellite. ISO carried an array of four scientific instruments for observations in the infrared: All four instruments were mounted directly behind the primary mirror of the telescope, in a circular arrangement, with each instrument taking up an 80 degree segment of

2670-634: The ECB's banknotes are put into circulation by the NCBs, thereby incurring matching liabilities vis-à-vis the ECB. These liabilities carry interest at the main refinancing rate of the ECB. The other 92% of euro banknotes are issued by the NCBs in proportion to their respective shares of the ECB capital key, calculated using national share of European Union (EU) population and national share of EU GDP, equally weighted. Member states are authorised to print or to commission bank note printing. As of November 2022 , these are

2759-712: The EDA software world are NI Multisim, Cadence ( ORCAD ), EAGLE PCB and Schematic, Mentor (PADS PCB and LOGIC Schematic), Altium (Protel), LabCentre Electronics (Proteus), gEDA , KiCad and many others. Heat generated by electronic circuitry must be dissipated to prevent immediate failure and improve long term reliability. Heat dissipation is mostly achieved by passive conduction/convection. Means to achieve greater dissipation include heat sinks and fans for air cooling, and other forms of computer cooling such as water cooling . These techniques use convection , conduction , and radiation of heat energy . Electronic noise

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2848-603: The Portuguese escudos , which ceased to have monetary value after 31 December 2002, although banknotes remained exchangeable until 2022. A special euro currency sign (€) was designed after a public survey had narrowed ten of the original thirty proposals down to two. The President of the European Commission at the time ( Jacques Santer ) and the European Commissioner with responsibility for

2937-512: The Sun and it never pointed closer than 77 degrees to Earth, 24 degrees to the Moon or closer than 7 degrees to Jupiter . These restrictions meant that at any given time only about 15 percent of the sky was available to ISO. A pyramid-shaped mirror behind the primary mirror of the telescope distributed the infrared light to the four instruments, providing each of them with a 3 arc-minute section of

3026-667: The US dollar again had a face value higher than the Euro, at around US dollar 0.95 per euro. The euro is managed and administered by the European Central Bank (ECB, Frankfurt am Main ) and the Eurosystem , composed of the central banks of the eurozone countries. As an independent central bank, the ECB has sole authority to set monetary policy . The Eurosystem participates in the printing, minting and distribution of euro banknotes and coins in all member states, and

3115-481: The US or the UK" and the budget deficit for the euro area as a whole is much lower and the euro area's government debt/GDP ratio of 86% in 2010 was about the same level as that of the United States. "Moreover", they write, "private-sector indebtedness across the euro area as a whole is markedly lower than in the highly leveraged Anglo-Saxon economies". The authors conclude that the crisis "is as much political as economic" and

3204-430: The United States were relatively strong creditors – gained attention in summer 2012 even as Germany received a debt-rating warning of its own. The euro is the sole currency of 20 EU member states : Austria, Belgium, Croatia, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain. These countries constitute

3293-535: The advancement of electronics is the semiconductor industry , which in response to global demand continually produces ever-more sophisticated electronic devices and circuits. The semiconductor industry is one of the largest and most profitable sectors in the global economy, with annual revenues exceeding $ 481 billion in 2018. The electronics industry also encompasses other sectors that rely on electronic devices and systems, such as e-commerce, which generated over $ 29 trillion in online sales in 2017. The identification of

3382-409: The basis of all digital computers and microprocessor devices. They range from simple logic gates to large integrated circuits, employing millions of such gates. Digital circuits use a binary system with two voltage levels labelled "0" and "1" to indicated logical status. Often logic "0" will be a lower voltage and referred to as "Low" while logic "1" is referred to as "High". However, some systems use

3471-459: The circuit, thus slowing the computer. The invention of the integrated circuit by Jack Kilby and Robert Noyce solved this problem by making all the components and the chip out of the same block (monolith) of semiconductor material. The circuits could be made smaller, and the manufacturing process could be automated. This led to the idea of integrating all components on a single-crystal silicon wafer, which led to small-scale integration (SSI) in

3560-464: The coin to commemorate the 2004 Summer Olympics issued by Greece. These coins are legal tender throughout the eurozone. Collector coins with various other denominations have been issued as well, but these are not intended for general circulation, and they are legal tender only in the member state that issued them. A number of institutions are authorised to mint euro coins: The design for the euro banknotes has common designs on both sides. The design

3649-455: The cylindrical space. The field of view for each instrument was offset to the central axis of the telescope's field of view. This means that every instrument 'saw' a different portion of the sky at a given moment. In standard operational mode one instrument was in primary operation. After a very successful development and integration phase ISO was finally launched into orbit on 17 November 1995, on board an Ariane-44P launch vehicle. Performance of

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3738-874: The early 1960s, and then medium-scale integration (MSI) in the late 1960s, followed by VLSI . In 2008, billion-transistor processors became commercially available. An electronic component is any component in an electronic system either active or passive. Components are connected together, usually by being soldered to a printed circuit board (PCB), to create an electronic circuit with a particular function. Components may be packaged singly, or in more complex groups as integrated circuits . Passive electronic components are capacitors , inductors , resistors , whilst active components are such as semiconductor devices; transistors and thyristors , which control current flow at electron level. Electronic circuit functions can be divided into two function groups: analog and digital. A particular device may consist of circuitry that has either or

3827-452: The electronic logic gates to generate binary states. Highly integrated devices: Electronic systems design deals with the multi-disciplinary design issues of complex electronic devices and systems, such as mobile phones and computers . The subject covers a broad spectrum, from the design and development of an electronic system ( new product development ) to assuring its proper function, service life and disposal . Electronic systems design

3916-613: The euro ( Yves-Thibault de Silguy ) then chose the winning design. Regarding the symbol, the European Commission stated on behalf of the European Union : The symbol € is based on the Greek letter epsilon (Є), with the first letter in the word "Europe" and with 2 parallel lines signifying stability. The European Commission also specified a euro logo with exact proportions. Placement of the currency sign relative to

4005-551: The euro ). The name "euro" was officially adopted in Madrid on 16 December 1995. Belgian Esperantist Germain Pirlot , a former teacher of French and history, is credited with naming the new currency by sending a letter to then President of the European Commission , Jacques Santer , suggesting the name "euro" on 4 August 1995. Due to differences in national conventions for rounding and significant digits, all conversion between

4094-687: The euro , which is a precondition to joining the eurozone. The Danish krone and Bulgarian lev are pegged due to their participation in the ERM ;II . Additionally, a total of 21 countries and territories that do not belong to the EU have currencies that are directly pegged to the euro including 14 countries in mainland Africa ( CFA franc ), two African island countries ( Comorian franc and Cape Verdean escudo ), three French Pacific territories ( CFP franc ) and two Balkan countries, Bosnia and Herzegovina ( Bosnia and Herzegovina convertible mark ) and North Macedonia ( Macedonian denar ). On 1 January 2010,

4183-422: The euro area or, more commonly, the eurozone . The euro is divided into 100 euro cents . The currency is also used officially by the institutions of the European Union , by four European microstates that are not EU members, the British Overseas Territory of Akrotiri and Dhekelia , as well as unilaterally by Montenegro and Kosovo . Outside Europe, a number of special territories of EU members also use

4272-492: The euro as their currency. Additionally, over 200 million people worldwide use currencies pegged to the euro . The euro is the second-largest reserve currency as well as the second-most traded currency in the world after the United States dollar . As of December 2019, with more than €1.3 trillion in circulation, the euro has one of the highest combined values of banknotes and coins in circulation in

4361-453: The euro their currencies became pegged to the euro. Pegging a country's currency to a major currency is regarded as a safety measure, especially for currencies of areas with weak economies, as the euro is seen as a stable currency, prevents runaway inflation, and encourages foreign investment due to its stability. In total, as of 2013 , 182 million people in Africa use a currency pegged to

4450-580: The euro, 27 million people outside the eurozone in Europe, and another 545,000 people on Pacific islands. Electronics Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other electrically charged particles . It is a subfield of physics and electrical engineering which uses active devices such as transistors , diodes , and integrated circuits to control and amplify

4539-596: The euro, while the remaining states do not have a migration plan in progress. The euro is divided into 100 cents (also referred to as euro cents , especially when distinguishing them from other currencies, and referred to as such on the common side of all cent coins). In Community legislative acts the plural forms of euro and cent are spelled without the s , notwithstanding normal English usage. Otherwise, normal English plurals are used, with many local variations such as centime in France. All circulating coins have

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4628-421: The eurozone are also treated as domestic transactions; however paper-based payment orders, like cheques, have not been standardised so these are still domestic-based. The ECB has also set up a clearing system , TARGET , for large euro transactions. The euro was established by the provisions in the 1992 Maastricht Treaty . To participate in the currency, member states are meant to meet strict criteria , such as

4717-457: The expected results from IRAS led to the first proposal for ISO made to ESA in the same year. With the rapid improvements in infrared detector-technology, ISO was to provide detailed observations for some 30,000 infrared sources with much improved sensitivity and resolution . ISO was to perform 1000 times better in sensitivity and 100 times better in angular resolution at 12 micrometres compared to IRAS. A number of follow-up studies resulted in

4806-404: The flow of electric current and to convert it from one form to another, such as from alternating current (AC) to direct current (DC) or from analog signals to digital signals. Electronic devices have hugely influenced the development of many aspects of modern society, such as telecommunications , entertainment, education, health care, industry, and security. The main driving force behind

4895-562: The following ways: The electronics industry consists of various sectors. The central driving force behind the entire electronics industry is the semiconductor industry sector, which has annual sales of over $ 481 billion as of 2018. The largest industry sector is e-commerce , which generated over $ 29 trillion in 2017. The most widely manufactured electronic device is the metal-oxide-semiconductor field-effect transistor (MOSFET), with an estimated 13   sextillion MOSFETs having been manufactured between 1960 and 2018. In

4984-484: The former currencies. Between December 1999 and December 2002, the euro traded below the US dollar, but has since traded near parity with or above the US dollar, peaking at US$ 1.60 on 18 July 2008 and since then returning near to its original issue rate. On 13 July 2022, the two currencies hit parity for the first time in nearly two decades due in part to the 2022 Russian invasion of Ukraine . Then, in September 2022,

5073-489: The functions of analog circuits were taken over by digital circuits, and modern circuits that are entirely analog are less common; their functions being replaced by hybrid approach which, for instance, uses analog circuits at the front end of a device receiving an analog signal, and then use digital processing using microprocessor techniques thereafter. Sometimes it may be difficult to classify some circuits that have elements of both linear and non-linear operation. An example

5162-414: The hydrazine propellant tank and provided up to 600 watts of electrical power by means of solar cells mounted on the sunpointing side of the service module-mounted sunshield. The underside of the service module sported a load-bearing, ring shaped, physical interface for the launch vehicle. The cryostat of the payload module surrounded the telescope and science instrument with a large dewar containing

5251-556: The initial designs by Robert Kalina were of specific bridges, including the Rialto and the Pont de Neuilly , and were subsequently rendered more generic; the final designs still bear very close similarities to their specific prototypes; thus they are not truly generic. The monuments looked similar enough to different national monuments to please everyone. The Europa series, or second series, consists of six denominations and no longer includes

5340-460: The last helium coolant depleted on 8 April 1998. The perigee of ISO's orbit lay well inside the Van Allen radiation belt , forcing the science instruments to be shut down for seven hours during each pass through the radiation belt. Thus, 17 hours in each orbit remained for scientific observation. A typical 24-hour orbit of ISO can be broken down into six phases: Contrary to IRAS, no science data

5429-672: The launch vehicle was very good with the apogee only 43 km lower than expected. ESA's Space Operations Centre in Darmstadt in Germany had full control over ISO in the first four days of flight. After early commissioning primary control over ISO was handed over to the Spacecraft Control Centre (SCC) at Villanueva de la Cañada in Spain ( VILSPA ) for the remainder of the mission. In the first three weeks after launch

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5518-500: The map only showed the 15 member states of the union as of 2002. Beginning in 2007 or 2008 (depending on the country), the old map was replaced by a map of Europe also showing countries outside the EU . The 1-, 2- and 5-cent coins, however, keep their old design, showing a geographical map of Europe with the EU member states as of 2002, raised somewhat above the rest of the map. All common sides were designed by Luc Luycx . The coins also have

5607-508: The mission. IPAC supports ISO observers and data archive users through in-house visits and workshops. In 1983, the US-Dutch-British IRAS inaugurated space-based infrared astronomy by performing the first-ever 'all-sky survey' at infrared wavelengths . The resulting map of the infrared sky pinpointed some 350,000 infrared sources waiting to be explored by IRAS' successors. In 1979, IRAS was in an advanced stage of planning and

5696-676: The month following depletion of coolant the 'Technology Test Phase' (TTP) was initiated to test several elements of the satellite in off-nominal conditions. After completion of TTP, the perigee of ISO's orbit was lowered sufficiently enough to ensure ISO will burn up in Earth's atmosphere in 20 to 30 years after shutdown. ISO was then permanently switched off on 16 May 1998 at 12:00 UTC. On average, ISO performed 45 observations in each 24-hour orbit. Throughout its lifetime of over 900 orbits ISO performed more than 26,000 successful scientific observations. The huge amounts of scientific data generated by ISO

5785-399: The most widely used electronic device in the world. The MOSFET is the basic element in most modern electronic equipment. As the complexity of circuits grew, problems arose. One problem was the size of the circuit. A complex circuit like a computer was dependent on speed. If the components were large, the wires interconnecting them must be long. The electric signals took time to go through

5874-630: The national currencies ceased to be legal tender varied from member state to member state. The earliest date was in Germany, where the mark officially ceased to be legal tender on 31 December 2001, though the exchange period lasted for two months more. Even after the old currencies ceased to be legal tender, they continued to be accepted by national central banks for periods ranging from several years to indefinitely (the latter for Austria, Germany, Ireland, Estonia and Latvia in banknotes and coins, and for Belgium, Luxembourg, Slovenia and Slovakia in banknotes only). The earliest coins to become non-convertible were

5963-559: The national currencies had to be carried out using the process of triangulation via the euro. The definitive values of one euro in terms of the exchange rates at which the currency entered the euro are shown in the table. The rates were determined by the Council of the European Union , based on a recommendation from the European Commission based on the market rates on 31 December 1998. They were set so that one European Currency Unit (ECU) would equal one euro. The European Currency Unit

6052-696: The numeric amount varies from state to state, but for texts in English published by EU institutions, the symbol (or the ISO -standard "EUR") should precede the amount. Following the U.S. financial crisis in 2008, fears of a sovereign debt crisis developed in 2009 among investors concerning some European states, with the situation becoming particularly tense in early 2010 . Greece was most acutely affected, but fellow Eurozone members Cyprus , Ireland , Italy , Portugal , and Spain were also significantly affected. All these countries used EU funds except Italy, which

6141-529: The obligation to adopt the euro by not meeting the monetary and budgetary requirements. All nations that have joined the EU since 1993 have pledged to adopt the euro in due course. The Maastricht Treaty was amended by the 2001 Treaty of Nice , which closed the gaps and loopholes in the Maastricht and Rome Treaties. The 20 participating members are EU Outermost Regions : Overseas Territories : Special Autonomous Territories : Microstates with

6230-444: The operation of the eurozone payment systems. The 1992 Maastricht Treaty obliges most EU member states to adopt the euro upon meeting certain monetary and budgetary convergence criteria , although not all participating states have done so. Denmark has negotiated exemptions, while Sweden (which joined the EU in 1995, after the Maastricht Treaty was signed) turned down the euro in a 2003 non-binding referendum , and has circumvented

6319-403: The printers: Capital within the EU may be transferred in any amount from one state to another. All intra-Union transfers in euro are treated as domestic transactions and bear the corresponding domestic transfer costs. This includes all member states of the EU, even those outside the eurozone providing the transactions are carried out in euro. Credit/debit card charging and ATM withdrawals within

6408-511: The public; a design competition will also be held. Since 1 January 2002, the national central banks (NCBs) and the ECB have issued euro banknotes on a joint basis. Eurosystem NCBs are required to accept euro banknotes put into circulation by other Eurosystem members and these banknotes are not repatriated. The ECB issues 8% of the total value of banknotes issued by the Eurosystem. In practice,

6497-455: The result of the fact that the euro area lacks the support of "institutional paraphernalia (and mutual bonds of solidarity) of a state". The crisis continued with S&P downgrading the credit rating of nine euro-area countries, including France, then downgrading the entire European Financial Stability Facility (EFSF) fund. A historical parallel – to 1931 when Germany was burdened with debt, unemployment and austerity while France and

6586-540: The reverse definition ("0" is "High") or are current based. Quite often the logic designer may reverse these definitions from one circuit to the next as they see fit to facilitate their design. The definition of the levels as "0" or "1" is arbitrary. Ternary (with three states) logic has been studied, and some prototype computers made, but have not gained any significant practical acceptance. Universally, Computers and Digital signal processors are constructed with digital circuits using Transistors such as MOSFETs in

6675-481: The selection of ISO as the next installment for the ESA Scientific Programme in 1983. Next came a Call for Experiment and Mission Scientist Proposals to the scientific community, resulting in the selection of the scientific instruments in 1985. The four instruments chosen were developed by teams of researchers from France, Germany, the Netherlands and United Kingdom. Design and development of

6764-474: The successor to the European Currency Unit (ECU). The notes and coins for the old currencies, however, continued to be used as legal tender until new euro notes and coins were introduced on 1 January 2002. The changeover period during which the former currencies' notes and coins were exchanged for those of the euro lasted about two months, until 28 February 2002. The official date on which

6853-558: The telescope and instruments would see only their own intense infrared emissions rather than the faint ones from afar. The ISO telescope was mounted on the center line of the dewar, near the bottom-side of the toroidal helium tank. It was of the Ritchey-Chrétien type with an effective entrance pupil of 60 cm, a focal length ratio of 15 and a resulting focal length of 900 cm. Very strict control over straylight, particularly that from bright infrared sources outside

6942-453: The telescope's field of view , was necessary to ensure the guaranteed sensitivity of the scientific instruments. A combination of light-tight shields, baffles inside the telescope and the sunshade on top of the cryostat accomplished full protection against straylight. Furthermore, ISO was constrained from observing too close to the Sun, Earth and Moon; all major sources of infrared radiation. ISO always pointed between 60 and 120 degrees away from

7031-472: The world. The name euro was officially adopted on 16 December 1995 in Madrid . The euro was introduced to world financial markets as an accounting currency on 1 January 1999, replacing the former European Currency Unit (ECU) at a ratio of 1:1 (US$ 1.1743 at the time). Physical euro coins and banknotes entered into circulation on 1 January 2002, making it the day-to-day operating currency of its original members, and by March 2002 it had completely replaced

7120-762: The years. For instance, early electronics often used point to point wiring with components attached to wooden breadboards to construct circuits. Cordwood construction and wire wrap were other methods used. Most modern day electronics now use printed circuit boards made of materials such as FR4 , or the cheaper (and less hard-wearing) Synthetic Resin Bonded Paper ( SRBP , also known as Paxoline/Paxolin (trade marks) and FR2) – characterised by its brown colour. Health and environmental concerns associated with electronics assembly have gained increased attention in recent years, especially for products destined to go to European markets. Electrical components are generally mounted in

7209-433: The €500 with issuance discontinued as of 27 April 2019. However, both the first and the second series of euro banknotes, including the €500, remain legal tender throughout the euro area. In December 2021, the ECB announced its plans to redesign euro banknotes by 2024. A theme advisory group, made up of one member from each euro area country, was selected to submit theme proposals to the ECB. The proposals will be voted on by

7298-560: Was already two years old. While the conversion rates for the initial eleven currencies were determined only hours before the euro was introduced, the conversion rate for the Greek drachma was fixed several months beforehand. The currency was introduced in non-physical form ( traveller's cheques , electronic transfers, banking, etc.) at midnight on 1 January 1999, when the national currencies of participating countries (the eurozone) ceased to exist independently. Their exchange rates were locked at fixed rates against each other. The euro thus became

7387-503: Was an accounting unit used by the EU, based on the currencies of the member states; it was not a currency in its own right. They could not be set earlier, because the ECU depended on the closing exchange rate of the non-euro currencies (principally pound sterling ) that day. The procedure used to fix the conversion rate between the Greek drachma and the euro was different since the euro by then

7476-476: Was composed of two major components: The payload module also held a conical sun shade, to prevent stray light from reaching the telescope, and two large star trackers . The latter were part of the Attitude and Orbit Control Subsystem (AOCS) which provided three-axis stabilisation of ISO with a pointing accuracy of one arc second . It consisted of Sun and Earth sensors, the before-mentioned star trackers,

7565-508: Was cooled to 1.7 kelvins by means of superfluid helium . The ISO satellite contained four instruments that allowed for imaging and photometry from 2.5 to 240 micrometres and spectroscopy from 2.5 to 196.8 micrometers. ESA and the Infrared Processing and Analysis Center made efforts to improve the data pipelines and specialized software analysis tools to yield the best quality calibration and data reduction methods from

7654-510: Was created by the Austrian designer Robert Kalina . Notes are issued in €500 , €200 , €100 , €50 , €20 , €10 , and €5 . Each banknote has its own colour and is dedicated to an artistic period of European architecture. The front of the note features windows or gateways while the back has bridges, symbolising links between states in the union and with the future. While the designs are supposed to be devoid of any identifiable characteristics,

7743-473: Was rapid, and by the 1920s, commercial radio broadcasting and telecommunications were becoming widespread and electronic amplifiers were being used in such diverse applications as long-distance telephony and the music recording industry. The next big technological step took several decades to appear, when the first working point-contact transistor was invented by John Bardeen and Walter Houser Brattain at Bell Labs in 1947. However, vacuum tubes played

7832-420: Was recorded on-board ISO for later transmission to the ground. All data, both science data and housekeeping data were transmitted to the ground in real-time. The perigee point of ISO's orbit was below the radio horizon of the mission control centers at both VILSPA and Goldstone, thus forcing the science instruments to be switched off at perigee. At 07:00 UTC on 8 April 1998 flight controllers at VILSPA noticed

7921-412: Was subject to extensive archiving activities up to 2006. The full data-set has been available to the scientific community since 1998 and many discoveries have been made, with probably many more still to come: Euro The euro ( symbol : € ; currency code : EUR ) is the official currency of 20 of the 27 member states of the European Union . This group of states is officially known as

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