126-529: The Korea Research Institute of Standards and Science ( KRISS ) is the national measurement standards laboratory for the Republic of Korea . It is a government-funded institute responsible for providing national measurement standards and advancing measurement technologies. KRISS is also an active member of the General Conference on Weights and Measures ( CGPM ). KRISS was established in 1975 as
252-572: A counter-revolution . In response, the Assembly published the August Decrees which abolished feudalism . Over 25% of French farmland was subject to feudal dues , providing the nobility with most of their income; these were now cancelled, along with church tithes. While their former tenants were supposed to pay them compensation, collecting it proved impossible, and the obligation was annulled in 1793. Other decrees included equality before
378-482: A 95% confidence that the measured value will fall inside the uncertainty interval. Other values of k can be used to indicate a greater or lower confidence on the interval, for example k = 1 and k = 3 generally indicate 66% and 99.7% confidence respectively. The uncertainty value is determined through a combination of statistical analysis of the calibration and uncertainty contribution from other errors in measurement process, which can be evaluated from sources such as
504-669: A CIPM report and endorse new developments in the SI as advised by the CIPM. The last meeting was held on 13–16 November 2018. On the last day of this conference there was vote on the redefinition of four base units, which the International Committee for Weights and Measures (CIPM) had proposed earlier that year. The new definitions came into force on 20 May 2019. The International Committee for Weights and Measures ( French : Comité international des poids et mesures , or CIPM)
630-471: A Parisian mob, and neither Bailly nor Lafayette could prevent it. In rural areas, wild rumours and paranoia resulted in the formation of militia and an agrarian insurrection known as la Grande Peur . The breakdown of law and order and frequent attacks on aristocratic property led much of the nobility to flee abroad. These émigrés funded reactionary forces within France and urged foreign monarchs to back
756-439: A campaign for war against Austria and Prussia, often interpreted as a mixture of calculation and idealism. While exploiting popular anti-Austrianism, it reflected a genuine belief in exporting the values of political liberty and popular sovereignty. Simultaneously, conservatives headed by Marie Antoinette also favoured war, seeing it as a way to regain control of the military, and restore royal authority. In December 1791, Louis made
882-556: A common understanding of units, crucial to human activity. Metrology is a wide reaching field, but can be summarized through three basic activities: the definition of internationally accepted units of measurement, the realisation of these units of measurement in practice, and the application of chains of traceability (linking measurements to reference standards). These concepts apply in different degrees to metrology's three main fields: scientific metrology; applied, technical or industrial metrology, and legal metrology. Scientific metrology
1008-480: A conference in 1977 to develop international cooperation for accredited testing and calibration results to facilitate trade. In 2000, 36 members signed the ILAC mutual recognition agreement (MRA), allowing members work to be automatically accepted by other signatories, and in 2012 was expanded to include accreditation of inspection bodies. Through this standardisation, work done in laboratories accredited by signatories
1134-420: A country and their recognition by the international community, which has a wide-ranging impact in its society (including economics, energy, environment, health, manufacturing, industry and consumer confidence). The effects of metrology on trade and economy are some of the easiest-observed societal impacts. To facilitate fair trade, there must be an agreed-upon system of measurement. The ability to measure alone
1260-580: A country's accreditation body must comply with international requirements and is generally the product of international and regional cooperation. A laboratory is evaluated according to international standards such as ISO/IEC 17025 general requirements for the competence of testing and calibration laboratories. To ensure objective and technically-credible accreditation, the bodies are independent of other national measurement system institutions. The National Association of Testing Authorities in Australia and
1386-503: A country's measurement infrastructure. The NMS sets measurement standards, ensuring the accuracy, consistency, comparability, and reliability of measurements made in the country. The measurements of member countries of the CIPM Mutual Recognition Arrangement (CIPM MRA), an agreement of national metrology institutes, are recognized by other member countries. As of March 2018, there are 102 signatories of
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#17327869285241512-683: A distinction opposed by a significant minority, including the Jacobin clubs . By mid-1790, the main elements of a constitutional monarchy were in place, although the constitution was not accepted by Louis until 1791. Food shortages and the worsening economy caused frustration at the lack of progress, and led to popular unrest in Paris. This came to a head in late September 1789, when the Flanders Regiment arrived in Versailles to reinforce
1638-1082: A lead NMI and several decentralised institutes specialising in specific national standards. Some examples of NMI's are the National Institute of Standards and Technology (NIST) in the United States, the National Research Council (NRC) in Canada, the Physikalisch-Technische Bundesanstalt (PTB) in Germany, and the National Physical Laboratory (United Kingdom) (NPL). Calibration laboratories are generally responsible for calibrations of industrial instrumentation. Calibration laboratories are accredited and provide calibration services to industry firms, which provides
1764-492: A list of grievances, known as Cahiers de doléances . Tax inequality and seigneurial dues (feudal payments owed to landowners) headed the grievances in the cahiers de doleances for the estate. On 5 May 1789, the Estates-General convened at Versailles . Necker outlined the state budget and reiterated the king's decision that each estate should decide on which matters it would agree to meet and vote in common with
1890-494: A majority by forging consensus with monarchiens like Mounier, and independents including Adrien Duport , Barnave and Alexandre Lameth . At one end of the political spectrum, reactionaries like Cazalès and Maury denounced the Revolution in all its forms, with radicals like Maximilien Robespierre at the other. He and Jean-Paul Marat opposed the criteria for "active citizens", gaining them substantial support among
2016-503: A mutual acceptance arrangement (MAA) for measuring instruments that are subject to legal metrological control, which upon approval allows the evaluation and test reports of the instrument to be accepted in all participating countries. Issuing participants in the agreement issue MAA Type Evaluation Reports of MAA Certificates upon demonstration of compliance with ISO/IEC 17065 and a peer evaluation system to determine competency. This ensures that certification of measuring devices in one country
2142-465: A national measurement system to be recognized internationally by the CIPM Mutual Recognition Arrangement, an NMI must participate in international comparisons of its measurement capabilities. BIPM maintains a comparison database and a list of calibration and measurement capabilities (CMCs) of the countries participating in the CIPM MRA. Not all countries have a centralised metrology institute; some have
2268-543: A natural source was proposed. This led to the creation of the decimal-based metric system in 1795, establishing a set of standards for other types of measurements. Several other countries adopted the metric system between 1795 and 1875; to ensure conformity between the countries, the Bureau International des Poids et Mesures (BIPM) was established by the Metre Convention . This has evolved into
2394-467: A new independent judiciary, with jury trials for criminal cases. However, moderate deputies were uneasy at popular demands for universal suffrage, labour unions and cheap bread, and over the winter of 1790 and 1791, they passed a series of measures intended to disarm popular radicalism. These included exclusion of poorer citizens from the National Guard, limits on use of petitions and posters, and
2520-562: A philosophical founder of the revolution, wrote it was "manifestly contrary to the law of nature ... that a handful of people should gorge themselves with superfluities, while the hungry multitude goes in want of necessities." The Revolution caused a massive shift of power from the Catholic Church to the state; although the extent of religious belief has been questioned, elimination of tolerance for religious minorities meant by 1789 being French also meant being Catholic. The church
2646-588: A positive impact on GDP . In the United Kingdom, an estimated 28.4 per cent of GDP growth from 1921 to 2013 was the result of standardisation; in Canada between 1981 and 2004 an estimated nine per cent of GDP growth was standardisation-related, and in Germany the annual economic benefit of standardisation is an estimated 0.72% of GDP. Legal metrology has reduced accidental deaths and injuries with measuring devices, such as radar guns and breathalyzers , by improving their efficiency and reliability. Measuring
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#17327869285242772-542: A representative body that had last met in 1614. The conflict between the Crown and the parlements became a national political crisis. Both sides issued a series of public statements, the government arguing that it was combating privilege and the parlement defending the ancient rights of the nation. Public opinion was firmly on the side of the parlements , and riots broke out in several towns. Brienne's attempts to raise new loans failed, and on 8 August 1788, he announced that
2898-571: A result, the clergy and nobility could combine to outvote the Third Estate despite representing less than 5% of the population. Following the relaxation of censorship and laws against political clubs, a group of liberal nobles and middle class activists, known as the Society of Thirty, launched a campaign for the doubling of Third Estate representation and individual voting. The public debate saw an average of 25 new political pamphlets published
3024-550: A significant proportion of the 6 million Frenchmen over 25, while only 10% of those able to vote actually did so. Finally, poor harvests and rising food prices led to unrest among the urban class known as Sans-culottes , who saw the new regime as failing to meet their demands for bread and work. This meant the new constitution was opposed by significant elements inside and outside the Assembly, itself split into three main groups. 264 members were affiliated with Barnave's Feuillants , constitutional monarchists who considered
3150-445: A single body, and the following day approved a " suspensive veto " for the king, meaning Louis could delay implementation of a law, but not block it indefinitely. In October, the Assembly voted to restrict political rights, including voting rights, to "active citizens", defined as French males over the age of 25 who paid direct taxes equal to three days' labour. The remainder were designated "passive citizens", restricted to "civil rights",
3276-541: A speech in the Assembly giving foreign powers a month to disband the émigrés or face war, an act greeted with enthusiasm by supporters, but suspicion from opponents. Barnave's inability to build a consensus in the Assembly resulted in the appointment of a new government, chiefly composed of Brissotins . On 20 April 1792, the French Revolutionary Wars began when French armies attacked Austrian and Prussian forces along their borders, before suffering
3402-513: A technical infrastructure and tools that can then be used to pursue further innovation. By providing a technical platform which new ideas can be built upon, easily demonstrated, and shared, measurement standards allow new ideas to be explored and expanded upon. French Revolution The French Revolution ( French : Révolution française [ʁevɔlysjɔ̃ fʁɑ̃sɛːz] ) was a period of political and societal change in France that began with
3528-402: A traceability link back to the national metrology institute. Since the calibration laboratories are accredited, they give companies a traceability link to national metrology standards. An organisation is accredited when an authoritative body determines, by assessing the organisation's personnel and management systems, that it is competent to provide its services. For international recognition,
3654-410: A week from 25 September 1788. The Abbé Sieyès issued influential pamphlets denouncing the privilege of the clergy and nobility, and arguing the Third Estate represented the nation and should sit alone as a National Assembly. Activists such as Mounier , Barnave and Robespierre organised regional meetings, petitions and literature in support of these demands. In December, the king agreed to double
3780-576: Is a collaboration of eight partner organisations: The JCGM has two working groups: JCGM-WG1 and JCGM-WG2. JCGM-WG1 is responsible for the GUM, and JCGM-WG2 for the VIM. Each member organization appoints one representative and up to two experts to attend each meeting, and may appoint up to three experts for each working group. A national measurement system (NMS) is a network of laboratories, calibration facilities and accreditation bodies which implement and maintain
3906-505: Is an organisation based in Sèvres, France which has custody of the international prototype of the kilogram , provides metrology services for the CGPM and CIPM, houses the secretariat for the organisations and hosts their meetings. Over the years, prototypes of the metre and of the kilogram have been returned to BIPM headquarters for recalibration. The BIPM director is an ex officio member of
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4032-635: Is automatically recognised internationally through the MRA. Other work done by ILAC includes promotion of laboratory and inspection body accreditation, and supporting the development of accreditation systems in developing economies. The Joint Committee for Guides in Metrology (JCGM) is a committee which created and maintains two metrology guides: Guide to the expression of uncertainty in measurement (GUM) and International vocabulary of metrology – basic and general concepts and associated terms (VIM). The JCGM
4158-604: Is compatible with another country's certification process, allowing the trade of the measuring devices and the products that rely on them. WELMEC was established in 1990 to promote cooperation in the field of legal metrology in the European Union and among European Free Trade Association (EFTA) member states. In the United States legal metrology is under the authority of the Office of Weights and Measures of National Institute of Standards and Technology (NIST), enforced by
4284-542: Is compatible with the certification process in other participating countries, allowing the trade of the measuring devices and the products that rely on them. The International Laboratory Accreditation Cooperation (ILAC) is an international organisation for accreditation agencies involved in the certification of conformity-assessment bodies. It standardises accreditation practices and procedures, recognising competent calibration facilities and assisting countries developing their own accreditation bodies. ILAC originally began as
4410-412: Is concerned with the application of measurement to manufacturing and other processes and their use in society, ensuring the suitability of measurement instruments, their calibration and quality control. Producing good measurements is important in industry as it has an impact on the value and quality of the end product, and a 10–15% impact on production costs. Although the emphasis in this area of metrology
4536-448: Is concerned with the establishment of units of measurement, the development of new measurement methods, the realisation of measurement standards, and the transfer of traceability from these standards to users in a society. This type of metrology is considered the top level of metrology which strives for the highest degree of accuracy. BIPM maintains a database of the metrological calibration and measurement capabilities of institutes around
4662-420: Is defined as the "property of a measurement result whereby the result can be related to a reference through a documented unbroken chain of calibrations, each contributing to the measurement uncertainty". It permits the comparison of measurements, whether the result is compared to the previous result in the same laboratory, a measurement result a year ago, or to the result of a measurement performed anywhere else in
4788-453: Is insufficient; standardisation is crucial for measurements to be meaningful. The first record of a permanent standard was in 2900 BC, when the royal Egyptian cubit was carved from black granite . The cubit was decreed to be the length of the Pharaoh's forearm plus the width of his hand, and replica standards were given to builders. The success of a standardised length for the building of
4914-513: Is made up of eighteen (originally fourteen) individuals from a member state of high scientific standing, nominated by the CGPM to advise the CGPM on administrative and technical matters. It is responsible for ten consultative committees (CCs), each of which investigates a different aspect of metrology; one CC discusses the measurement of temperature, another the measurement of mass, and so forth. The CIPM meets annually in Sèvres to discuss reports from
5040-732: Is on the measurements themselves, traceability of the measuring- device calibration is necessary to ensure confidence in the measurement. Recognition of the metrological competence in industry can be achieved through mutual recognition agreements, accreditation, or peer review. Industrial metrology is important to a country's economic and industrial development, and the condition of a country's industrial-metrology program can indicate its economic status. Legal metrology "concerns activities which result from statutory requirements and concern measurement, units of measurement , measuring instruments and methods of measurement and which are performed by competent bodies". Such statutory requirements may arise from
5166-563: Is the international standards, which beholds the world's standards. The next level is the national Metrology institutes that have primary standards that are traceable to the international standards. The national Metrology institutes standards are used to establish a traceable link to local laboratory standards, these laboratory standards are then used to establish a traceable link to industry and testing laboratories. Through these subsequent calibrations between national metrology institutes, calibration laboratories, and industry and testing laboratories
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5292-427: Is to fall within the uncertainty interval. Uncertainty is generally expressed as follows: Where y is the measurement value and U is the uncertainty value and k is the coverage factor indicates the confidence interval. The upper and lower limit of the uncertainty interval can be determined by adding and subtracting the uncertainty value from the measurement value. The coverage factor of k = 2 generally indicates
5418-751: The ancien régime ("old regime") proved unable to manage. A financial crisis and widespread social distress led to the convocation of the Estates General in May 1789, its first meeting since 1614. The representatives of the Third Estate broke away, and re-constituted themselves as a National Assembly in June. The Storming of the Bastille in Paris on 14 July was followed by a series of radical measures by
5544-525: The Champ de Mars to sign. Led by Lafayette, the National Guard was ordered to "preserve public order" and responded to a barrage of stones by firing into the crowd , killing between 13 and 50 people. The massacre badly damaged Lafayette's reputation: the authorities responded by closing radical clubs and newspapers, while their leaders went into exile or hiding, including Marat. On 27 August, Emperor Leopold II and King Frederick William II of Prussia issued
5670-658: The Declaration of Pillnitz declaring their support for Louis and hinting at an invasion of France on his behalf. In reality, the meeting between Leopold and Frederick was primarily to discuss the Partitions of Poland ; the Declaration was intended to satisfy Comte d'Artois and other French émigrés but the threat rallied popular support behind the regime. Based on a motion proposed by Robespierre, existing deputies were barred from elections held in early September for
5796-589: The Estates General of 1789 , and ended with the coup of 18 Brumaire in November 1799 and the formation of the French Consulate . Many of its ideas are considered fundamental principles of liberal democracy , while its values and institutions remain central to modern French political discourse. The causes of the revolution were a combination of social, political, and economic factors which
5922-577: The French Legislative Assembly . Although Robespierre himself was one of those excluded, his support in the clubs gave him a political power base not available to Lafayette and Bailly, who resigned respectively as head of the National Guard and the Paris Commune. The new laws were gathered together in the 1791 Constitution , and submitted to Louis XVI, who pledged to defend it "from enemies at home and abroad". On 30 September,
6048-493: The French Revolution . With a political motivation to harmonise units throughout France, a length standard based on a natural source was proposed. In March 1791, the metre was defined. This led to the creation of the decimal-based metric system in 1795, establishing standards for other types of measurements. Several other countries adopted the metric system between 1795 and 1875; to ensure international conformity,
6174-478: The Hôtel de Ville, some 7,000 of them marched on Versailles , where they entered the Assembly to present their demands. They were followed to Versailles by 15,000 members of the National Guard under Lafayette, who was virtually "a prisoner of his own troops". When the National Guard arrived later that evening, Lafayette persuaded Louis the safety of his family required their relocation to Paris. Next morning, some of
6300-576: The International Bureau of Weights and Measures ( French : Bureau International des Poids et Mesures , or BIPM) was formed by the Metre Convention . Although the BIPM's original mission was to create international standards for units of measurement and relate them to national standards to ensure conformity, its scope has broadened to include electrical and photometric units and ionizing radiation measurement standards. The metric system
6426-633: The International System of Units (SI) as a result of a resolution at the 11th General Conference on Weights and Measures (CGPM) in 1960. Metrology is divided into three basic overlapping activities: These overlapping activities are used in varying degrees by the three basic sub-fields of metrology: In each country, a national measurement system (NMS) exists as a network of laboratories, calibration facilities and accreditation bodies which implement and maintain its metrology infrastructure. The NMS affects how measurements are made in
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#17327869285246552-635: The Korea Standards Research Institute , and initiated calibration services in 1979. The institute became known as the Korea Research Institute of Standards and Science in 1991. In 1999, KRISS was officially designated to serve as the national metrology institute by the Framework Act on National Standards (Article 13). It maintains South Korea's primary measurement standards. The first woman to head
6678-657: The Planck constant ( h ), the elementary electric charge ( e ), the Boltzmann constant ( k ), and the Avogadro constant ( N A ), respectively. The second , metre , and candela have previously been defined by physical constants (the caesium standard (Δ ν Cs ), the speed of light ( c ), and the luminous efficacy of 540 × 10 Hz visible light radiation ( K cd )), subject to correction to their present definitions. The new definitions aim to improve
6804-672: The United Kingdom Accreditation Service are examples of accreditation bodies. Metrology has wide-ranging impacts on a number of sectors, including economics, energy, the environment, health, manufacturing, industry, and consumer confidence. The effects of metrology on trade and the economy are two of its most-apparent societal impacts. To facilitate fair and accurate trade between countries, there must be an agreed-upon system of measurement. Accurate measurement and regulation of water, fuel, food, and electricity are critical for consumer protection and promote
6930-471: The Vendée , where only a few priests took the oath and the civilian population turned against the revolution. The result was state-led persecution of " Refractory clergy ", many of whom were forced into exile, deported, or executed. The period from October 1789 to spring 1791 is usually seen as one of relative tranquility, when some of the most important legislative reforms were enacted. However, conflict over
7056-519: The parlements , the nobility, and those subject to new taxes. France primarily funded the Anglo-French War of 1778–1783 through loans. Following the peace, the monarchy borrowed heavily, culminating in a debt crisis. By 1788, half of state revenue was required to service its debt. In 1786, the French finance minister, Calonne , proposed a package of reforms including a universal land tax,
7182-459: The quantum Hall effect for the ohm ), and the use of a material object as the measurement standard. A standard (or etalon) is an object, system, or experiment with a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and measures by realising, preserving, or reproducing a unit against which measuring devices can be compared. There are three levels of standards in
7308-417: The Assembly and published on 26 August as a statement of principle. The Assembly now concentrated on the constitution itself. Mounier and his monarchist supporters advocated a bicameral system, with an upper house appointed by the king, who would also have the right to appoint ministers and veto legislation. On 10 September, the majority of the Assembly, led by Sieyès and Talleyrand , voted in favour of
7434-498: The Assembly was increasingly divided, while external players like the Paris Commune and National Guard competed for power. One of the most significant was the Jacobin club; originally a forum for general debate, by August 1790 it had over 150 members, split into different factions. The Assembly continued to develop new institutions; in September 1790, the regional Parlements were abolished and their legal functions replaced by
7560-623: The Assembly went into a non-stop session after rumours circulated he was planning to use the Swiss Guards to force it to close. The news brought crowds of protestors into the streets, and soldiers of the elite Gardes Françaises regiment refused to disperse them. On the 14th, many of these soldiers joined the mob in attacking the Bastille , a royal fortress with large stores of arms and ammunition. Its governor, Bernard-René de Launay , surrendered after several hours of fighting that cost
7686-608: The Assembly, among them the abolition of feudalism , state control over the Catholic Church , and a declaration of rights . The next three years were dominated by the struggle for political control, and military defeats following the outbreak of the French Revolutionary Wars in April 1792 led to an insurrection on 10 August . The monarchy was replaced by the French First Republic in September, and Louis XVI
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#17327869285247812-416: The BIPM to complete the task of defining all SI base units in terms of physical constants . By defining SI base units with respect to physical constants, and not artefacts or specific substances, they are realisable with a higher level of precision and reproducibility. As of the revision of the SI on 20 May 2019 the kilogram , ampere , kelvin , and mole are defined by setting exact numerical values for
7938-506: The CCs, to submit an annual report to the governments of member states concerning the administration and finances of the BIPM and to advise the CGPM on technical matters as needed. Each member of the CIPM is from a different member state, with France (in recognition of its role in establishing the convention) always having one seat. The International Bureau of Weights and Measures ( French : Bureau international des poids et mesures , or BIPM)
8064-402: The CIPM MRA, consisting of 58 member states, 40 associate states, and 4 international organizations. A national metrology institute's (NMI) role in a country's measurement system is to conduct scientific metrology, realise base units, and maintain primary national standards. An NMI provides traceability to international standards for a country, anchoring its national calibration hierarchy. For
8190-485: The CIPM and a member of all consultative committees. The International Organization of Legal Metrology ( French : Organisation Internationale de Métrologie Légale , or OIML), is an intergovernmental organization created in 1955 to promote the global harmonisation of the legal metrology procedures facilitating international trade. This harmonisation of technical requirements, test procedures and test-report formats ensure confidence in measurements for trade and reduces
8316-528: The Civil Constitution led to a state of near civil war in southern France, which Barnave tried to defuse by relaxing the more punitive provisions. On 29 November, the Assembly approved a decree giving refractory clergy eight days to comply, or face charges of 'conspiracy against the nation', an act opposed even by Robespierre. When Louis vetoed both, his opponents were able to portray him as opposed to reform in general. Brissot accompanied this with
8442-565: The Constituent Assembly was dissolved, and the Legislative Assembly convened the next day. The Legislative Assembly is often dismissed by historians as an ineffective body, compromised by divisions over the role of the monarchy, an issue exacerbated when Louis attempted to prevent or reverse limitations on his powers. At the same time, restricting the vote to those who paid a minimal amount of tax disenfranchised
8568-539: The Crown. The royal family left the palace in disguise on the night of 20 June 1791; late the next day, Louis was recognised as he passed through Varennes , arrested and taken back to Paris. The attempted escape had a profound impact on public opinion; since it was clear Louis had been seeking refuge in Austria, the Assembly now demanded oaths of loyalty to the regime, and began preparing for war, while fear of 'spies and traitors' became pervasive. Despite calls to replace
8694-402: The Estates-General. However, he stated that the three estates were sacrosanct and it was up to each estate to agree to end their privileges and decide on which matters they would vote in common with the other estates. At the end of the session the Third Estate refused to leave the hall and reiterated their oath not to disperse until a constitution had been agreed. Over the next days more members of
8820-623: The European revolts of the 1780s inspired public debate on issues such as patriotism, liberty, equality, and democracy. These shaped the response of the educated public to the crisis, while scandals such as the Affair of the Diamond Necklace fuelled widespread anger at the court, nobility, and church officials. France faced a series of budgetary crises during the 18th century, as revenues failed to keep pace with expenditure. Although
8946-469: The French'. Historian John McManners argues "in eighteenth-century France, throne and altar were commonly spoken of as in close alliance; their simultaneous collapse ... would one day provide the final proof of their interdependence." One suggestion is that after a century of persecution, some French Protestants actively supported an anti-Catholic regime, a resentment fuelled by Enlightenment thinkers such as Voltaire . Jean-Jacques Rousseau , considered
9072-744: The International Committee for Weights and Measures (CIPM), was an advisory committee of metrologists of high standing. The third, the International Bureau of Weights and Measures (BIPM), provided secretarial and laboratory facilities for the CGPM and CIPM. The General Conference on Weights and Measures ( French : Conférence générale des poids et mesures , or CGPM) is the convention's principal decision-making body, consisting of delegates from member states and non-voting observers from associate states. The conference usually meets every four to six years to receive and discuss
9198-400: The June 1791 Le Chapelier Law suppressing trade guilds and any form of worker organisation. The traditional force for preserving law and order was the army, which was increasingly divided between officers, who largely came from the nobility, and ordinary soldiers. In August 1790, the loyalist General Bouillé suppressed a serious mutiny at Nancy ; although congratulated by the Assembly, he
9324-465: The Parisian proletariat, many of whom had been disenfranchised by the measure. On 14 July 1790, celebrations were held throughout France commemorating the fall of the Bastille, with participants swearing an oath of fidelity to "the nation, the law and the king." The Fête de la Fédération in Paris was attended by the royal family, with Talleyrand performing a mass . Despite this show of unity,
9450-429: The Revolution had gone far enough, while another 136 were Jacobin leftists who supported a republic, led by Brissot and usually referred to as Brissotins . The remaining 345 belonged to La Plaine , a centrist faction who switched votes depending on the issue, but many of whom shared doubts as to whether Louis was committed to the Revolution. After he officially accepted the new Constitution, one recorded response
9576-415: The SI without changing the size of any units, thus ensuring continuity with existing measurements. The realisation of a unit of measure is its conversion into reality. Three possible methods of realisation are defined by the international vocabulary of metrology (VIM): a physical realisation of the unit from its definition, a highly-reproducible measurement as a reproduction of the definition (such as
9702-470: The Third Estate declared itself to be the National Assembly of France and that all existing taxes were illegal. Within two days, more than 100 members of the clergy had joined them. Shaken by this challenge to his authority, the king agreed to a reform package that he would announce at a Royal Session of the Estates-General. The Salle des États was closed to prepare for the joint session, but
9828-560: The Third despite representing less than 5% of the population. Although the Catholic Church in France owned nearly 10% of all land, as well as receiving annual tithes paid by peasants, three-quarters of the 303 clergy elected were parish priests, many of whom earned less than unskilled labourers and had more in common with their poor parishioners than with the bishops of the first estate. The Second Estate elected 322 deputies, representing about 400,000 men and women, who owned about 25% of
9954-399: The abolition of grain controls and internal tariffs, and new provincial assemblies appointed by the king. The new taxes, however, were rejected, first by a hand-picked Assembly of Notables dominated by the nobility, then by the parlements when submitted by Calonne's successor Brienne . The notables and parlements argued that the proposed taxes could only be approved by an Estates-General,
10080-573: The authority of the Pope over the French Church. In October, thirty bishops wrote a declaration denouncing the law, further fuelling opposition. When clergy were required to swear loyalty to the Civil Constitution in November 1790, it split the church between the 24% who complied, and the majority who refused. This stiffened popular resistance against state interference, especially in traditionally Catholic areas such as Normandy , Brittany and
10206-415: The base units. The motivation in the change of the base units is to make the entire system derivable from physical constants , which required the removal of the prototype kilogram as it is the last artefact the unit definitions depend on. Scientific metrology plays an important role in this redefinition of the units as precise measurements of the physical constants is required to have accurate definitions of
10332-459: The base units. To redefine the value of a kilogram without an artefact the value of the Planck constant must be known to twenty parts per billion. Scientific metrology, through the development of the Kibble balance and the Avogadro project , has produced a value of Planck constant with low enough uncertainty to allow for a redefinition of the kilogram. Applied, technical or industrial metrology
10458-483: The calling of the Estates General of 1789 , which became radicalised by the struggle for control of public finances. Louis XVI was willing to consider reforms, but often backed down when faced with opposition from conservative elements within the nobility. Enlightenment critiques of social institutions were widely discussed among the educated French elite. At the same time, the American Revolution and
10584-521: The clergy joined the National Assembly. On 27 June, faced with popular demonstrations and mutinies in his French Guards , Louis XVI capitulated. He commanded the members of the first and second estates to join the third in the National Assembly. Even the limited reforms the king had announced went too far for Marie Antoinette and Louis' younger brother the Comte d'Artois . On their advice, Louis dismissed Necker again as chief minister on 11 July. On 12 July,
10710-472: The costs of discrepancies and measurement duplication. The OIML publishes a number of international reports in four categories: Although the OIML has no legal authority to impose its recommendations and guidelines on its member countries, it provides a standardised legal framework for those countries to assist the development of appropriate, harmonised legislation for certification and calibration. OIML provides
10836-497: The economy grew solidly, the increase was not reflected in a proportional growth in taxes, their collection being contracted to tax farmers who kept much of it as personal profit. As the nobility and Church benefited from many exemptions, the tax burden fell mainly on peasants. Reform was difficult because new tax laws had to be registered with regional judicial bodies or parlements that were able to block them. The king could impose laws by decree, but this risked open conflict with
10962-547: The empires and the Dark Ages that followed lost much measurement knowledge and standardisation. Although local systems of measurement were common, comparability was difficult since many local systems were incompatible. England established the Assize of Measures to create standards for length measurements in 1196, and the 1215 Magna Carta included a section for the measurement of wine and beer. Modern metrology has its roots in
11088-403: The flow of goods and services between trading partners. A common measurement system and quality standards benefit consumer and producer; production at a common standard reduces cost and consumer risk, ensuring that the product meets consumer needs. Transaction costs are reduced through an increased economy of scale . Several studies have indicated that increased standardisation in measurement has
11214-411: The hierarchy of metrology: primary, secondary, and working standards. Primary standards (the highest quality) do not reference any other standards. Secondary standards are calibrated with reference to a primary standard. Working standards, used to calibrate (or check) measuring instruments or other material measures, are calibrated with respect to secondary standards. The hierarchy preserves the quality of
11340-524: The higher standards. An example of a standard would be gauge blocks for length. A gauge block is a block of metal or ceramic with two opposing faces ground precisely flat and parallel, a precise distance apart. The length of the path of light in vacuum during a time interval of 1/299,792,458 of a second is embodied in an artefact standard such as a gauge block; this gauge block is then a primary standard which can be used to calibrate secondary standards through mechanical comparators. Metrological traceability
11466-429: The human body is challenging, with poor repeatability and reproducibility , and advances in metrology help develop new techniques to improve health care and reduce costs. Environmental policy is based on research data, and accurate measurements are important for assessing climate change and environmental regulation. Aside from regulation, metrology is essential in supporting innovation, the ability to measure provides
11592-419: The individual states. The International System of Units (SI) defines seven base units: length , mass , time , electric current , thermodynamic temperature , amount of substance , and luminous intensity . By convention, each of these units are considered to be mutually independent and can be constructed directly from their defining constants. All other SI units are constructed as products of powers of
11718-487: The instrument history, manufacturer's specifications, or published information. Several international organizations maintain and standardise metrology. The Metre Convention created three main international organizations to facilitate standardisation of weights and measures. The first, the General Conference on Weights and Measures (CGPM), provided a forum for representatives of member states. The second,
11844-464: The king would summon an Estates-General to convene the following May. Brienne resigned and was replaced by Necker . In September 1788, the Parlement of Paris ruled that the Estates-General should convene in the same form as in 1614, meaning that the three estates (the clergy, nobility, and Third Estate or "commons") would meet and vote separately, with votes counted by estate rather than by head. As
11970-564: The land and collected seigneurial dues and rents from their tenants. Most delegates were town-dwelling members of the noblesse d'épée , or traditional aristocracy. Courtiers and representatives of the noblesse de robe (those who derived rank from judicial or administrative posts) were underrepresented. Of the 610 deputies of the Third Estate, about two-thirds held legal qualifications and almost half were venal office holders. Less than 100 were in trade or industry and none were peasants or artisans. To assist delegates, each region completed
12096-403: The law, opening public office to all, freedom of worship, and cancellation of special privileges held by provinces and towns. With the suspension of the 13 regional parlements in November, the key institutional pillars of the old regime had all been abolished in less than four months. From its early stages, the Revolution therefore displayed signs of its radical nature; what remained unclear
12222-519: The lives of 83 attackers. Taken to the Hôtel de Ville , he was executed, his head placed on a pike and paraded around the city; the fortress was then torn down in a remarkably short time. Although rumoured to hold many prisoners, the Bastille held only seven: four forgers, a lunatic, a failed assassin, and a deviant nobleman. Nevertheless, as a potent symbol of the Ancien Régime , its destruction
12348-418: The measurement value and uncertainty of the device that is being calibrated (the comparator) and create a traceability link to the measurement standard. The four primary reasons for calibrations are to provide traceability, to ensure that the instrument (or standard) is consistent with other measurements, to determine accuracy, and to establish reliability. Traceability works as a pyramid, at the top level there
12474-475: The members of the Estates-General were not informed in advance. On 20 June, when the members of the Third Estate found their meeting place closed, they moved to a nearby tennis court and swore not to disperse until a new constitution had been agreed. At the Royal Session the king announced a series of tax and other reforms and stated that no new taxes or loans would be implemented without the consent of
12600-442: The monarchy with a republic, Louis retained his position but was generally regarded with acute suspicion and forced to swear allegiance to the constitution. A new decree stated retracting this oath, making war upon the nation, or permitting anyone to do so in his name would be considered abdication. However, radicals led by Jacques Pierre Brissot prepared a petition demanding his deposition, and on 17 July, an immense crowd gathered in
12726-404: The need for protection of health, public safety, the environment, enabling taxation, protection of consumers and fair trade. The International Organization for Legal Metrology ( OIML ) was established to assist in harmonising regulations across national boundaries to ensure that legal requirements do not inhibit trade. This harmonisation ensures that certification of measuring devices in one country
12852-425: The organization was Kwang Hwa Chung , who became president in 2005 and served through 2008. Measurement standards laboratory Metrology is the scientific study of measurement . It establishes a common understanding of units, crucial in linking human activities. Modern metrology has its roots in the French Revolution 's political motivation to standardise units in France when a length standard taken from
12978-422: The other estates. On the following day, each estate was to separately verify the credentials of their representatives. The Third Estate, however, voted to invite the other estates to join them in verifying all the representatives of the Estates-General in common and to agree that votes should be counted by head. Fruitless negotiations lasted to 12 June when the Third Estate began verifying its own members. On 17 June,
13104-464: The protestors broke into the royal apartments, searching for Marie Antoinette, who escaped. They ransacked the palace, killing several guards. Order was eventually restored, and the royal family and Assembly left for Paris, escorted by the National Guard. Louis had announced his acceptance of the August Decrees and the Declaration, and his official title changed from 'King of France' to 'King of
13230-556: The pyramids is indicated by the lengths of their bases differing by no more than 0.05 per cent. In China weights and measures had a semi religious meaning as it was used in the various crafts by the Artificers and in ritual utensils and is mentioned in the book of rites along with the steelyard balance and other tools. Other civilizations produced generally accepted measurement standards, with Roman and Greek architecture based on distinct systems of measurement. The collapse of
13356-408: The realisation of the unit definition is propagated down through the pyramid. The traceability chain works upwards from the bottom of the pyramid, where measurements done by industry and testing laboratories can be directly related to the unit definition at the top through the traceability chain created by calibration. Measurement uncertainty is a value associated with a measurement which expresses
13482-430: The rentier and mercantile classes, while the living standards fell for wage labourers and peasant farmers who rented their land. Economic recession from 1785, combined with bad harvests in 1787 and 1788, led to high unemployment and food prices, causing a financial and political crisis. While the state also experienced a debt crisis, the level of debt itself was not high compared with Britain's. A significant problem
13608-616: The representation of the Third Estate, but left the question of counting votes for the Estates-General to decide. The Estates-General contained three separate bodies, the First Estate representing 100,000 clergy, the Second the nobility, and the Third the "commons". Since each met separately, and any proposals had to be approved by at least two, the First and Second Estates could outvote
13734-519: The royal bodyguard, and were welcomed with a formal banquet as was common practice. The radical press described this as a 'gluttonous orgy', and claimed the tricolour cockade had been abused, while the Assembly viewed their arrival as an attempt to intimidate them. On 5 October, crowds of women assembled outside the Hôtel de Ville , agitating against high food prices and shortages. These protests quickly turned political, and after seizing weapons stored at
13860-496: The ruling elite , and indecisive policy by Louis XVI and his ministers, the result was a crisis the state was unable to manage. Between 1715 and 1789, the French population grew from 21 to 28 million, 20% of whom lived in towns or cities, Paris alone having over 600,000 inhabitants. This was accompanied by a tripling in the size of the middle class, which comprised almost 10% of the population by 1789. Despite increases in overall prosperity, its benefits were largely restricted to
13986-436: The seven base units. Since the base units are the reference points for all measurements taken in SI units, if the reference value changed all prior measurements would be incorrect. Before 2019, if a piece of the international prototype of the kilogram had been snapped off, it would have still been defined as a kilogram; all previous measured values of a kilogram would be heavier. The importance of reproducible SI units has led
14112-525: The source of legitimate authority was more apparent in the provinces, where officers of the Ancien Régime had been swept away, but not yet replaced by new structures. This was less obvious in Paris, since the National Guard made it the best policed city in Europe, but disorder in the provinces inevitably affected members of the Assembly. Centrists led by Sieyès, Lafayette, Mirabeau and Bailly created
14238-411: The spread of possible values associated with the measurand —a quantitative expression of the doubt existing in the measurement. There are two components to the uncertainty of a measurement: the width of the uncertainty interval and the confidence level. The uncertainty interval is a range of values that the measurement value expected to fall within, while the confidence level is how likely the true value
14364-556: The state assumed responsibilities such as paying the clergy and caring for the poor, the sick and the orphaned. On 13 February 1790, religious orders and monasteries were dissolved, while monks and nuns were encouraged to return to private life. The Civil Constitution of the Clergy of 12 July 1790 made them employees of the state, as well as establishing rates of pay and a system for electing priests and bishops. Pope Pius VI and many French Catholics objected to this since it denied
14490-410: The world. The chain of traceability allows any measurement to be referenced to higher levels of measurements back to the original definition of the unit. Traceability is obtained directly through calibration , establishing the relationship between an indication on a standard traceable measuring instrument and the value of the comparator (or comparative measuring instrument). The process will determine
14616-431: The world. These institutes, whose activities are peer-reviewed, provide the fundamental reference points for metrological traceability. In the area of measurement, BIPM has identified nine metrology areas, which are acoustics, electricity and magnetism, length, mass and related quantities, photometry and radiometry, ionizing radiation, time and frequency, thermometry, and chemistry. As of May 2019 no physical objects define
14742-469: Was " Vive le roi, s'il est de bon foi! ", or "Long live the king – if he keeps his word". Although a minority in the Assembly, control of key committees allowed the Brissotins to provoke Louis into using his veto. They first managed to pass decrees confiscating émigré property and threatening them with the death penalty. This was followed by measures against non-juring priests, whose opposition to
14868-489: Was criticised by Jacobin radicals for the severity of his actions. Growing disorder meant many professional officers either left or became émigrés, further destabilising the institution. Held in the Tuileries Palace under virtual house arrest, Louis XVI was urged by his brother and wife to re-assert his independence by taking refuge with Bouillé, who was based at Montmédy with 10,000 soldiers considered loyal to
14994-753: Was executed in January 1793. After another revolt in June 1793 , the constitution was suspended, and adequate political power passed from the National Convention to the Committee of Public Safety , led by the Jacobins . About 16,000 people were executed in what was later referred to as Reign of Terror , which ended in July 1794 . Weakened by external threats and internal opposition, the Republic
15120-467: Was greeted by Bailly and accepted a tricolore cockade to loud cheers. However, it was clear power had shifted from his court; he was welcomed as 'Louis XVI, father of the French and king of a free people.' The short-lived unity enforced on the Assembly by a common threat quickly dissipated. Deputies argued over constitutional forms, while civil authority rapidly deteriorated. On 22 July, former Finance Minister Joseph Foullon and his son were lynched by
15246-495: Was modernised in 1960 with the creation of the International System of Units (SI) as a result of a resolution at the 11th General Conference on Weights and Measures ( French : Conference Generale des Poids et Mesures , or CGPM). Metrology is defined by the International Bureau of Weights and Measures (BIPM) as "the science of measurement, embracing both experimental and theoretical determinations at any level of uncertainty in any field of science and technology". It establishes
15372-616: Was replaced in 1795 by the Directory , and four years later, in 1799, the Consulate seized power in a military coup led by Napoleon Bonaparte on 9 November. This event is generally seen as marking the end of the Revolutionary period. The Revolution resulted from multiple long-term and short-term factors, culminating in a social, economic, financial and political crisis in the late 1780s. Combined with resistance to reform by
15498-400: Was that tax rates varied widely from one region to another, were often different from the official amounts, and collected inconsistently. Its complexity meant uncertainty over the amount contributed by any authorised tax caused resentment among all taxpayers. Attempts to simplify the system were blocked by the regional Parlements which approved financial policy. The resulting impasse led to
15624-514: Was the constitutional mechanism for turning intentions into practical applications. On 9 July, the National Assembly appointed a committee to draft a constitution and statement of rights. Twenty drafts were submitted, which were used by a sub-committee to create a Declaration of the Rights of Man and of the Citizen , with Mirabeau being the most prominent member. The Declaration was approved by
15750-449: Was the largest individual landowner in France, controlling nearly 10% of all estates and levied tithes , effectively a 10% tax on income, collected from peasant farmers in the form of crops. In return, it provided a minimal level of social support. The August decrees abolished tithes, and on 2 November the Assembly confiscated all church property, the value of which was used to back a new paper currency known as assignats . In return,
15876-670: Was viewed as a triumph and Bastille Day is still celebrated every year. In French culture, some see its fall as the start of the Revolution. Alarmed by the prospect of losing control of the capital, Louis appointed the Marquis de Lafayette commander of the National Guard , with Jean-Sylvain Bailly as head of a new administrative structure known as the Commune . On 17 July, Louis visited Paris accompanied by 100 deputies, where he
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