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125-554: The museum was established on April 13, 1896, upon enthronement of the emperor Nicholas II to commemorate his father, Alexander III . Its original collection was composed of artworks taken from the Hermitage Museum , Alexander Palace , and the Imperial Academy of Arts . The task to restructure the interiors according to the need of future exposition was imposed on Vasily Svinyin. The grand opening took place on

250-509: A tap or die , thread milling, single-point thread cutting, thread rolling, cold root rolling and forming, and thread grinding. A tap is used to cut a female thread on the inside surface of a pre-drilled hole, while a die cuts a male thread on a preformed cylindrical rod. Grinding uses an abrasive process to remove material from the workpiece. A grinding machine is a machine tool used for producing very fine finishes, making very light cuts, or high precision forms using an abrasive wheel as

375-490: A common method of deburring . Broaching is a machining operation used to cut keyways into shafts. Electron beam machining (EBM) is a machining process where high-velocity electrons are directed toward a work piece, creating heat and vaporizing the material. Ultrasonic machining uses ultrasonic vibrations to machine very hard or brittle materials. Welding is a fabrication process that joins materials, usually metals or thermoplastics , by causing coalescence . This

500-453: A contractor when necessary. The cultural property stored in museums is threatened in many countries by natural disaster , war , terrorist attacks or other emergencies. To this end, an internationally important aspect is a strong bundling of existing resources and the networking of existing specialist competencies in order to prevent any loss or damage to cultural property or to keep damage as low as possible. International partner for museums

625-471: A culture. As historian Steven Conn writes, "To see the thing itself, with one's own eyes and in a public place, surrounded by other people having some version of the same experience, can be enchanting." Museum purposes vary from institution to institution. Some favor education over conservation, or vice versa. For example, in the 1970s, the Canada Science and Technology Museum favored education over

750-411: A different speed on the milling tool and varies in the amount of material that can be removed in one pass of the tool. Harder materials are usually milled at slower speeds with small amounts of material removed. Softer materials vary, but usually are milled with a high bit speed. The use of a milling machine adds costs that are factored into the manufacturing process. Each time the machine is used coolant

875-718: A full-time director to whom authority is delegated for day-to-day operations; Have the financial resources sufficient to operate effectively; Demonstrate that it meets the Core Standards for Museums; Successfully complete the Core Documents Verification Program". Additionally, there is a legal definition of museum in United States legislation authorizing the establishment of the Institute of Museum and Library Services : "Museum means

1000-404: A lathe include candlestick holders, crankshafts , camshafts , and bearing mounts. Lathes have four main components: the bed, the headstock, the carriage, and the tailstock. The bed is a precise & very strong base which all of the other components rest upon for alignment. The headstock's spindle secures the workpiece with a chuck , whose jaws (usually three or four) are tightened around

1125-438: A mineral-bearing rock , that require heat or some other process to liberate the metal. Another feature of gold is that it is workable as it is found, meaning that no technology beyond a stone hammer and anvil is needed to work the metal. This is a result of gold's properties of malleability and ductility . The earliest tools were stone, bone , wood , and sinew , all of which sufficed to work gold. At some unknown time,

1250-427: A much wider range of objects than a library , and usually focus on a specific theme, such as the arts , science , natural history or local history . Public museums that host exhibitions and interactive demonstrations are often tourist attractions , and many attract large numbers of visitors from outside their host country, with the most visited museums in the world attracting millions of visitors annually. Since

1375-459: A museum and on display, they not only got to show their fantastic finds but also used the museum as a way to sort and "manage the empirical explosion of materials that wider dissemination of ancient texts, increased travel, voyages of discovery, and more systematic forms of communication and exchange had produced". One of these naturalists and collectors was Ulisse Aldrovandi , whose collection policy of gathering as many objects and facts about them

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1500-554: A museum is successful, as happened in Bilbao, others continue especially if a museum struggles to attract visitors. The Taubman Museum of Art is an example of an expensive museum (eventually $ 66 million) that attained little success and continues to have a low endowment for its size. Some museum activists see this method of museum use as a deeply flawed model for such institutions. Steven Conn, one such museum proponent, believes that "to ask museums to solve our political and economic problems

1625-402: A museum's collection typically determines the museum's size, whereas its collection reflects the type of museum it is. Many museums normally display a "permanent collection" of important selected objects in its area of specialization, and may periodically display "special collections" on a temporary basis. The following is a list to give an idea of the major museum types. While comprehensive, it

1750-509: A notable person, or a given period of time. Museums also can be based on the main source of funding: central or federal government, provinces, regions, universities; towns and communities; other subsidised; nonsubsidised and private. It may sometimes be useful to distinguish between diachronic museums which interpret the way its subject matter has developed and evolved through time (e.g., Lower East Side Tenement Museum and Diachronic Museum of Larissa ), and synchronic museums which interpret

1875-508: A palace of Henry VIII , in England opened the council room to the general public to create an interactive environment for visitors. Rather than allowing visitors to handle 500-year-old objects, however, the museum created replicas, as well as replica costumes. The daily activities, historic clothing, and even temperature changes immerse the visitor in an impression of what Tudor life may have been. Major professional organizations from around

2000-424: A production shop, to today's 30000 RPM CNC auto-loading manufacturing cell producing jet turbines, grinding processes vary greatly. Grinders need to be very rigid machines to produce the required finish. Some grinders are even used to produce glass scales for positioning CNC machine axis. The common rule is the machines used to produce scales be 10 times more accurate than the machines the parts are produced for. In

2125-407: A public, tribal, or private nonprofit institution which is organized on a permanent basis for essentially educational, cultural heritage, or aesthetic purposes and which, using a professional staff: Owns or uses tangible objects, either animate or inanimate; Cares for these objects; and Exhibits them to the general public on a regular basis" (Museum Services Act 1976). One of the oldest museums known

2250-410: A round hole. Drilling : Feeding the drill into the workpiece axially. Knurling : Uses a tool to produce a rough surface texture on the work piece. Frequently used to allow grip by hand on a metal part. Modern computer numerical control (CNC) lathes and (CNC) machining centres can do secondary operations like milling by using driven tools. When driven tools are used the work piece stops rotating and

2375-903: A series of standards and best practices that help guide the management of museums. Various positions within the museum carry out the policies established by the Board and the Director. All museum employees should work together toward the museum's institutional goal. Here is a list of positions commonly found at museums: Other positions commonly found at museums include: building operator, public programming staff, photographer , librarian , archivist , groundskeeper , volunteer coordinator, preparator, security staff, development officer, membership officer, business officer, gift shop manager, public relations staff, and graphic designer . At smaller museums, staff members often fulfill multiple roles. Some of these positions are excluded entirely or may be carried out by

2500-413: A single point tool on a lathe are: Chamfering: Cutting an angle on the corner of a cylinder. Parting: The tool is fed radially into the workpiece to cut off the end of a part. Threading : A tool is fed along and across the outside or inside surface of rotating parts to produce external or internal threads . Boring : A single-point tool is fed linearly and parallel to the axis of rotation to create

2625-417: A specific form by pouring molten metal into a mold and allowing it to cool, with no mechanical force. Forms of casting include: These forming processes modify metal or workpiece by deforming the object, that is, without removing any material. Forming is done with a system of mechanical forces and, especially for bulk metal forming, with heat. Plastic deformation involves using heat or pressure to make

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2750-445: A wide variety of specialized or general-use machine tools capable of creating highly precise, useful products. Many simpler metalworking techniques, such as blacksmithing , are no longer economically competitive on a large scale in developed countries; some of them are still in use in less developed countries, for artisanal or hobby work, or for historical reenactment. The oldest archaeological evidence of copper mining and working

2875-490: A workpiece more conductive to mechanical force. Historically, this and casting were done by blacksmiths, though today the process has been industrialized. In bulk metal forming, the workpiece is generally heated up. These types of forming process involve the application of mechanical force at room temperature. However, some recent developments involve the heating of dies and/or parts. Advancements in automated metalworking technology have made progressive die stamping possible which

3000-565: Is Ennigaldi-Nanna's museum , built by Princess Ennigaldi in modern Iraq at the end of the Neo-Babylonian Empire . The site dates from c.  530 BC , and contained artifacts from earlier Mesopotamian civilizations . Notably, a clay drum label—written in three languages—was found at the site, referencing the history and discovery of a museum item. Ancient Greeks and Romans collected and displayed art and objects but perceived museums differently from modern-day views. In

3125-773: Is UNESCO and Blue Shield International in accordance with the Hague Convention for the Protection of Cultural Property from 1954 and its 2nd Protocol from 1999. For legal reasons, there are many international collaborations between museums, and the local Blue Shield organizations. Blue Shield has conducted extensive missions to protect museums and cultural assets in armed conflict, such as 2011 in Egypt and Libya, 2013 in Syria and 2014 in Mali and Iraq. During these operations,

3250-430: Is a method that can encompass punching, coining, bending and several other ways below that modify metal at less cost while resulting in less scrap. Cutting is a collection of processes wherein material is brought to a specified geometry by removing excess material using various kinds of tooling to leave a finished part that meets specifications. The net result of cutting is two products, the waste or excess material, and

3375-407: Is also used, which must be periodically added in order to prevent breaking bits. A milling bit must also be changed as needed in order to prevent damage to the material. Time is the biggest factor for costs. Complex parts can require hours to complete, while very simple parts take only minutes. This in turn varies the production time as well, as each part will require different amounts of time. Safety

3500-412: Is an example of a specialty process that removes excess material by the use of etching chemicals and masking chemicals. There are many technologies available to cut metal, including: Cutting fluid or coolant is used where there is significant friction and heat at the cutting interface between a cutter such as a drill or an end mill and the workpiece. Coolant is generally introduced by a spray across

3625-554: Is believed to be one of the earliest museums in the world. While it connected to the Library of Alexandria it is not clear if the museum was in a different building from the library or was part of the library complex. While little was known about the museum it was an inspiration for museums during the early Renaissance period. The royal palaces also functioned as a kind of museum outfitted with art and objects from conquered territories and gifts from ambassadors from other kingdoms allowing

3750-567: Is carried out at the Museum Valuables Restoration Service. The need to set up a special restoration workshop at the Russian Museum was first raised in 1906. At that time, the artist and restorer A. Boravskiy drew up his famous project to set up a restoration workshop at the Russian Museum. However, owing to a lack of funds, he was not destined to succeed. It was in 1922 that the restoration workshop of

3875-429: Is combination of grinding and saw tooth cutting using a file . Prior to the development of modern machining equipment it provided a relatively accurate means for the production of small parts, especially those with flat surfaces. The skilled use of a file allowed a machinist to work to fine tolerances and was the hallmark of the craft. Today filing is rarely used as a production technique in industry, though it remains as

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4000-456: Is held at the desired height (usually the middle of the workpiece) by the toolpost. The carriage is then moved around the rotating workpiece, and the cutting tool gradually removes material from the workpiece. The tailstock can be slid along the axis of rotation and then locked in place as necessary. It may hold centers to further secure the workpiece, or cutting tools driven into the end of the workpiece. Other operations that can be performed with

4125-440: Is important because it is one indicator of how tightly bound to the ore the metal is likely to be. As can be seen, iron is significantly higher than the other six metals while gold is dramatically lower than the six above it. Gold's low oxidation is one of the main reasons that gold is found in nuggets. These nuggets are relatively pure gold and are workable as they are found. Copper ore, being relatively abundant, and tin ore became

4250-440: Is key with these machines. The bits are traveling at high speeds and removing pieces of usually scalding hot metal. The advantage of having a CNC milling machine is that it protects the machine operator. Turning is a metal cutting process for producing a cylindrical surface with a single point tool. The workpiece is rotated on a spindle and the cutting tool is fed into it radially, axially or both. Producing surfaces perpendicular to

4375-448: Is no longer a main purpose of most museums. While there is an ongoing debate about the purposes of interpretation of a museum's collection, there has been a consistent mission to protect and preserve cultural artifacts for future generations. Much care, expertise, and expense is invested in preservation efforts to retard decomposition in ageing documents, artifacts, artworks, and buildings. All museums display objects that are important to

4500-404: Is not a definitive list. Private museums are organized by individuals and managed by a board and museum officers, but public museums are created and managed by federal, state, or local governments. A government can charter a museum through legislative action but the museum can still be private as it is not part of the government. The distinction regulates the ownership and legal accountability for

4625-438: Is not necessarily a negative development; Dorothy Canfield Fisher observed that the reduction in objects has pushed museums to grow from institutions that artlessly showcased their many artifacts (in the style of early cabinets of curiosity) to instead "thinning out" the objects presented "for a general view of any given subject or period, and to put the rest away in archive-storage-rooms, where they could be consulted by students,

4750-634: Is particularly true in the case of postindustrial cities. Examples of museums fulfilling these economic roles exist around the world. For example, the Guggenheim Museum Bilbao was built in Bilbao, Spain in a move by the Basque regional government to revitalize the dilapidated old port area of that city. The Basque government agreed to pay $ 100 million for the construction of the museum, a price tag that caused many Bilbaoans to protest against

4875-423: Is the complex shaping of metal or other materials by removing material to form the final shape. It is generally done on a milling machine , a power-driven machine that in its basic form consists of a milling cutter that rotates about the spindle axis (like a drill ), and a worktable that can move in multiple directions (usually two dimensions [x and y axis] relative to the workpiece). The spindle usually moves in

5000-489: Is the process of transferring a design or pattern to a workpiece and is the first step in the handcraft of metalworking. It is performed in many industries or hobbies, although in industry, the repetition eliminates the need to mark out every individual piece. In the metal trades area, marking out consists of transferring the engineer's plan to the workpiece in preparation for the next step, machining or manufacture. Calipers are hand tools designed to precisely measure

5125-417: Is to set them up for inevitable failure and to set us (the visitor) up for inevitable disappointment." Museums are facing funding shortages. Funding for museums comes from four major categories, and as of 2009 the breakdown for the United States is as follows: Government support (at all levels) 24.4%, private (charitable) giving 36.5%, earned income 27.6%, and investment income 11.5%. Government funding from

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5250-518: The Age of Enlightenment saw their ideas of the museum as superior and based their natural history museums on "organization and taxonomy" rather than displaying everything in any order after the style of Aldrovandi. The first "public" museums were often accessible only for the middle and upper classes. It could be difficult to gain entrance. When the British Museum opened to the public in 1759, it

5375-466: The American Alliance of Museums does not have such a definition, their list of accreditation criteria to participate in their Accreditation Program states a museum must: "Be a legally organized nonprofit institution or part of a nonprofit organization or government entity; Be essentially educational in nature; Have a formally stated and approved mission; Use and interpret objects or a site for

5500-657: The Ancient Greek Μουσεῖον ( mouseion ), which denotes a place or temple dedicated to the muses (the patron divinities in Greek mythology of the arts), and hence was a building set apart for study and the arts, especially the Musaeum (institute) for philosophy and research at Alexandria , built under Ptolemy I Soter about 280 BC. The purpose of modern museums is to collect, preserve, interpret, and display objects of artistic, cultural, or scientific significance for

5625-463: The CNC machine and allow it to complete the tasks required. The milling machine can produce most parts in 3D, but some require the objects to be rotated around the x, y, or z coordinate axis (depending on the need). Tolerances come in a variety of standards, depending on the locale. In countries still using the imperial system, this is usually in the thousandths of an inch (unit known as thou ), depending on

5750-538: The National Endowment for the Arts , the largest museum funder in the United States, decreased by 19.586 million between 2011 and 2015, adjusted for inflation. The average spent per visitor in an art museum in 2016 was $ 8 between admissions, store and restaurant, where the average expense per visitor was $ 55. Corporations , which fall into the private giving category, can be a good source of funding to make up

5875-617: The Newark Museum in a series of books in the early 20th century so that other museum founders could plan their museums. Dana suggested that potential founders of museums should form a committee first, and reach out to the community for input as to what the museum should supply or do for the community. According to Dana, museums should be planned according to community's needs: "The new museum ... does not build on an educational superstition. It examines its community's life first, and then straightway bends its energies to supplying some

6000-482: The Smithsonian Institution stated that he wanted to establish an institution "for the increase and diffusion of knowledge". In the late 19th century, museums of natural history exemplified the scientific drive for classifying life and interpreting the world. Their purpose was to gather examples from each field of knowledge for research and display. Concurrently, as American colleges expanded during

6125-728: The Summer Garden , the Marble Palace of Count Orlov (1768–1785), St Michael's Castle of Emperor Paul (1797–1801), the cabin of Peter the Great , and the Rastrelliesque Stroganov Palace on the Nevsky Prospekt (1752–1754). The project of Benois Building (or 'Corpus Benua') was developed in 1910-1912 by the famous Russian architect Leon Benois . The construction started in 1914, but

6250-629: The Titanic Belfast , built on disused shipyards in Belfast , Northern Ireland , incidentally for the same price as the Guggenheim Museum Bilbao and by the same architect, Frank Gehry , in time for the 100th anniversary of Titanic 's maiden voyage in 2012. Initially expecting modest visitor numbers of 425,000 annually, first year visitor numbers reached over 800,000, with almost 60% coming from outside Northern Ireland. In

6375-675: The United States Holocaust Memorial Museum in Washington, D.C. uses many artifacts in their memorable exhibitions. Museums are laid out in a specific way for a specific reason and each person who enters the doors of a museum will see its collection completely differently to the person behind them- this is what makes museums fascinating because they are represented differently to each individual. In recent years, some cities have turned to museums as an avenue for economic development or rejuvenation. This

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6500-834: The interpretive plan for an exhibit, determining the most effective, engaging and appropriate methods of communicating a message or telling a story. The process will often mirror the architectural process or schedule, moving from conceptual plan, through schematic design, design development, contract document, fabrication, and installation. Museums of all sizes may also contract the outside services of exhibit fabrication businesses. Some museum scholars have even begun to question whether museums truly need artifacts at all. Historian Steven Conn provocatively asks this question, suggesting that there are fewer objects in all museums now, as they have been progressively replaced by interactive technology. As educational programming has grown in museums, mass collections of objects have receded in importance. This

6625-545: The smelting of ores and hot forging of harder metals like iron , up to and including highly technical modern processes such as machining and welding . It has been used as an industry, a driver of trade, individual hobbies, and in the creation of art; it can be regarded as both a science and a craft. Modern metalworking processes, though diverse and specialized, can be categorized into one of three broad areas known as forming, cutting, or joining processes. Modern metalworking workshops, typically known as machine shops , hold

6750-687: The 17 of March, 1898. After the Russian Revolution of 1917 , many private collections were nationalized and relocated to the Russian Museum. These included Kazimir Malevich 's Black Square . The main building of the museum is the Mikhailovsky Palace , the Neoclassical former residence of Grand Duke Michael Pavlovich , erected in 1819–1825 to a design by Carlo Rossi on Square of Arts in St Petersburg. Upon

6875-499: The 1860s. The British Museum was described by one of their delegates as a 'hakubutsukan', a 'house of extensive things' – this would eventually become accepted as the equivalent word for 'museum' in Japan and China. American museums eventually joined European museums as the world's leading centers for the production of new knowledge in their fields of interest. A period of intense museum building, in both an intellectual and physical sense

7000-471: The 1950s and 1960s, new workshops were set up. In 1953, a workshop for graphic arts restoration, in 1954 for Old Russian painting, in 1961 for wooden sculpture , decorative carving and furniture and a workshop for textile restoration, in 1969 for plaster and stone sculpture and 1970 for applied art. At present, the restoration department is made up of 16 workshops (sectors) for all types of materials, employing, its figures, 95 people. The department includes

7125-520: The 19th century, they also developed their own natural history collections to support the education of their students. By the last quarter of the 19th century, scientific research in universities was shifting toward biological research on a cellular level, and cutting-edge research moved from museums to university laboratories. While many large museums, such as the Smithsonian Institution, are still respected as research centers, research

7250-665: The British Museum for its possession of rare antiquities from Egypt, Greece, and the Middle East. The roles associated with the management of a museum largely depend on the size of the institution. Together, the Board and the Director establish a system of governance that is guided by policies that set standards for the institution. Documents that set these standards include an institutional or strategic plan, institutional code of ethics, bylaws, and collections policy. The American Alliance of Museums (AAM) has also formulated

7375-698: The Malaga branch range from Byzantine-inspired icons to social realism of the Soviet era. They are on display in 2,300 square metres (25,000 square feet)yards) of exhibition space in La Tabacalera, a 1920s tobacco factory. Museum A museum is an institution dedicated to displaying and/or preserving culturally or scientifically significant objects. Many museums have exhibitions of these objects on public display, and some have private collections that are used by researchers and specialists. Museums host

7500-717: The Restoration Commission were held, at which the most important issues on the research and methods of restoration of museum exhibits were considered. As of 1 January 2019, the Department of Restoration of Museum Estates was transformed into the Service of Restoration of Museum Estates. The Ethnographic Department was originally set up in a building specially designed by Vladimir Svinyin in 1902. The museum soon housed gifts received by Emperor's family from representatives of peoples inhabiting various regions of

7625-797: The Russian Empire. Further exhibits were purchased by Nicholas II and other members of his family as State financing was not enough to purchase new exhibits. In 1934, the Ethnographic Department was given the status of an independent museum: the Russian Museum of Ethnography . The city of Málaga , home to thousands of Russian expats, signed an agreement to host the first overseas branch of the State Russian Museum, which opened in March 2015. Works displayed in

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7750-640: The Russian Museum was established. Its first director was the painter-restorer N.A. Okolovich. The restoration workshop consisted of two sections: the main one, which worked for the Museum, and the regional one, which was engaged in saving cultural monuments in Petrograd and other cities of Russia. In 1935, the Conservation and Restoration Department was divided into laboratories and sections: painting, new painting, sculpture, applied art and folk art. During

7875-697: The United States, several Native American tribes and advocacy groups have lobbied extensively for the repatriation of sacred objects and the reburial of human remains. In 1990, Congress passed the Native American Graves Protection and Repatriation Act (NAGPRA), which required federal agencies and federally funded institutions to repatriate Native American "cultural items" to culturally affiliate tribes and groups. Similarly, many European museum collections often contain objects and cultural artifacts acquired through imperialism and colonization . Some historians and scholars have criticized

8000-543: The United States, similar projects include the 81,000 square foot Taubman Museum of Art in Roanoke, Virginia and The Broad in Los Angeles . Museums being used as a cultural economic driver by city and local governments has proven to be controversial among museum activists and local populations alike. Public protests have occurred in numerous cities which have tried to employ museums in this way. While most subside if

8125-628: The care of the collections. Metalworking Metalworking is the process of shaping and reshaping metals in order to create useful objects, parts, assemblies, and large scale structures. As a term, it covers a wide and diverse range of processes, skills, and tools for producing objects on every scale: from huge ships , buildings, and bridges , down to precise engine parts and delicate jewelry . The historical roots of metalworking predate recorded history; its use spans cultures, civilizations and millennia. It has evolved from shaping soft, native metals like gold with simple hand tools, through

8250-431: The chosen artifacts. These elements of planning have their roots with John Cotton Dana, who was perturbed at the historical placement of museums outside of cities, and in areas that were not easily accessed by the public, in gloomy European style buildings. Questions of accessibility continue to the present day. Many museums strive to make their buildings, programming, ideas, and collections more publicly accessible than in

8375-404: The classical period, the museums were the temples and their precincts which housed collections of votive offerings. Paintings and sculptures were displayed in gardens, forums, theaters, and bathhouses. In the ancient past there was little differentiation between libraries and museums with both occupying the building and were frequently connected to a temple or royal palace. The Museum of Alexandria

8500-404: The cutting device. This wheel can be made up of various sizes and types of stones, diamonds or inorganic materials. The simplest grinder is a bench grinder or a hand-held angle grinder, for deburring parts or cutting metal with a zip-disc. Grinders have increased in size and complexity with advances in time and technology. From the old days of a manual toolroom grinder sharpening endmills for

8625-785: The death of the Grand Duke the residence was named after his wife as the Palace of the Grand Duchess Elena Pavlovna , and became famous for its many theatrical presentations and balls. Some of the halls of the palace retain the Italianate opulent interiors of the former imperial residence. Other buildings and locations, assigned to the Russian museum, include the Summer Palace of Peter I (1710–1714) with

8750-539: The development of more modern 19th-century museums was part of new strategies by Western governments to produce a citizenry that, rather than be directed by coercive or external forces, monitored and regulated its own conduct. To incorporate the masses in this strategy, the private space of museums that previously had been restricted and socially exclusive were made public. As such, objects and artifacts, particularly those related to high culture, became instruments for these "new tasks of social management". Universities became

8875-414: The distance between two points. Most calipers have two sets of flat, parallel edges used for inner or outer diameter measurements. These calipers can be accurate to within one-thousandth of an inch (25.4 μm). Different types of calipers have different mechanisms for displaying the distance measured. Where larger objects need to be measured with less precision, a tape measure is often used. Casting achieves

9000-458: The driven tool executes the machining operation with a rotating cutting tool. The CNC machines use x, y, and z coordinates in order to control the turning tools and produce the product. Most modern day CNC lathes are able to produce most turned objects in 3D. Nearly all types of metal can be turned, although more time & specialist cutting tools are needed for harder workpieces. There are many threading processes including: cutting threads with

9125-538: The earth began to evolve, and metalsmiths became more knowledgeable. Metalsmiths became important members of society. Fates and economies of entire civilizations were greatly affected by the availability of metals and metalsmiths. The metalworker depends on the extraction of precious metals to make jewelry , build more efficient electronics , and for industrial and technological applications from construction to shipping containers to rail , and air transport . Without metals, goods and services would cease to move around

9250-472: The edge-durability and stiffness that pure copper lacked. Until the advent of iron, bronze was the most advanced metal for tools and weapons in common use (see Bronze Age for more detail). Outside Southwestern Asia, these same advances and materials were being discovered and used around the world. People in China and Great Britain began using bronze with little time being devoted to copper. Japanese began

9375-413: The establishment of the earliest known museum in ancient times , museums have been associated with academia and the preservation of rare items. Museums originated as private collections of interesting items, and not until much later did the emphasis on educating the public take root. The English word museum comes from Latin , and is pluralized as museums (or rarely, musea ). It is originally from

9500-524: The face of the tool and workpiece to decrease friction and temperature at the cutting tool/workpiece interface to prevent excessive tool wear. In practice there are many methods of delivering coolant. The use of an angle grinder in cutting is not preferred as large amounts of harmful sparks and fumes (and particulates ) are generated when compared with using reciprocating saw or band saw . Angle grinders produce sparks when cutting ferrous metals. They also produce shards cutting other materials. Milling

9625-423: The finished part. In woodworking, the waste would be sawdust and excess wood. In cutting metals the waste is chips or swarf and excess metal. Cutting processes fall into one of three major categories: Drilling a hole in a metal part is the most common example of a chip producing process. Using an oxy-fuel cutting torch to separate a plate of steel into smaller pieces is an example of burning. Chemical milling

9750-403: The following restoration workshops: easel painting , Old Russian paintings, mixed media painting, graphics , ceramics and glassware , textiles , metalwork , veneered furniture, polychrome and gilded carving, carved icons and wooden sculpture, picture frames, plaster and stone sculpture, contemporary art objects (established in 2010). The department is staffed by artists with the highest and

9875-409: The former use and status of an object. Religious or holy objects, for instance, are handled according to cultural rules. Jewish objects that contain the name of God may not be discarded, but need to be buried. Although most museums do not allow physical contact with the associated artifacts, there are some that are interactive and encourage a more hands-on approach. In 2009, Hampton Court Palace ,

10000-697: The funding gap. The amount corporations currently give to museums accounts for just 5% of total funding. Corporate giving to the arts, however, was set to increase by 3.3% in 2017. Most mid-size and large museums employ exhibit design staff for graphic and environmental design projects, including exhibitions. In addition to traditional 2-D and 3-D designers and architects, these staff departments may include audio-visual specialists, software designers, audience research, evaluation specialists, writers, editors, and preparators or art handlers. These staff specialists may also be charged with supervising contract design or production services. The exhibit design process builds on

10125-416: The globe on the scale we know today. Metalworking generally is divided into three categories: forming , cutting , and joining . Most metal cutting is done by high speed steel tools or carbide tools. Each of these categories contains various processes. Prior to most operations, the metal must be marked out and/or measured, depending on the desired finished product. Marking out (also known as layout)

10250-438: The globe. For example, the granulation technique was employed by numerous ancient cultures before the historic record shows people traveled to far regions to share this process. Metalsmiths today still use this and many other ancient techniques. As time progressed, metal objects became more common, and ever more complex. The need to further acquire and work metals grew in importance. Skills related to extracting metal ores from

10375-489: The highest restoration category. The department includes a sector of chemical and biological research and a sector of the history and theory of museum restoration. In 2014, the Department of Restoration of Museum Properties restored 4,511 exhibits, of which 280 were restored with special complexity. 5,930 exhibits were prepared for 77 museum exhibitions (preparation of preservation reports, preventive conservation and restoration, packing and unpacking of exhibits). 150 meetings of

10500-422: The looting of the collection is to be prevented in particular. The design of museums has evolved throughout history. However, museum planning involves planning the actual mission of the museum along with planning the space that the collection of the museum will be housed in. Intentional museum planning has its beginnings with the museum founder and librarian John Cotton Dana . Dana detailed the process of founding

10625-407: The material which that community needs, and to making that material's presence widely known, and to presenting it in such a way as to secure it for the maximum of use and the maximum efficiency of that use." The way that museums are planned and designed vary according to what collections they house, but overall, they adhere to planning a space that is easily accessed by the public and easily displays

10750-409: The museum landscape has become so varied, that it may not be sufficient to use traditional categories to comprehend fully the vast variety existing throughout the world. However, it may be useful to categorize museums in different ways under multiple perspectives. Museums can vary based on size, from large institutions, to very small institutions focusing on specific subjects, such as a specific location,

10875-617: The museum planning process. Some museum experiences have very few or no artifacts and do not necessarily call themselves museums, and their mission reflects this; the Griffith Observatory in Los Angeles and the National Constitution Center in Philadelphia , being notable examples where there are few artifacts, but strong, memorable stories are told or information is interpreted. In contrast,

11000-1038: The necessary materials could be assembled for smelting, heating, and working the metal. Iron was beginning to be smelted and began its emergence as an important metal for tools and weapons. The period that followed became known as the Iron Age . By the historical periods of the Pharaohs in Egypt , the Vedic Kings in India , the Tribes of Israel , and the Maya civilization in North America , among other ancient populations, precious metals began to have value attached to them. In some cases rules for ownership, distribution, and trade were created, enforced, and agreed upon by

11125-436: The next important substances in the story of metalworking. Using heat to smelt copper from ore, a great deal of copper was produced. It was used for both jewelry and simple tools. However, copper by itself was too soft for tools requiring edges and stiffness. At some point tin was added into the molten copper and bronze was developed thereby. Bronze is an alloy of copper and tin. Bronze was an important advance because it had

11250-525: The only people who really needed to see them". This phenomenon of disappearing objects is especially present in science museums like the Museum of Science and Industry in Chicago , which have a high visitorship of school-aged children who may benefit more from hands-on interactive technology than reading a label beside an artifact. There is no definitive standard as to the set types of museums. Additionally,

11375-593: The past grinders were used for finishing operations only because of limitations of tooling. Modern grinding wheel materials and the use of industrial diamonds or other man-made coatings (cubic boron nitride) on wheel forms have allowed grinders to achieve excellent results in production environments instead of being relegated to the back of the shop. Modern technology has advanced grinding operations to include CNC controls, high material removal rates with high precision, lending itself well to aerospace applications and high volume production runs of precision components. Filing

11500-415: The past. Not every museum is participating in this trend, but that seems to be the trajectory of museums in the twenty-first century with its emphasis on inclusiveness. One pioneering way museums are attempting to make their collections more accessible is with open storage. Most of a museum's collection is typically locked away in a secure location to be preserved, but the result is most people never get to see

11625-570: The personal collection of Elias Ashmole , was set up in the University of Oxford to be open to the public and is considered by some to be the first modern public museum. The collection included that of Elias Ashmole which he had collected himself, including objects he had acquired from the gardeners, travellers and collectors John Tradescant the elder and his son of the same name . The collection included antique coins, books, engravings, geological specimens, and zoological specimens—one of which

11750-435: The piece. The spindle rotates at high speed, providing the energy to cut the material. While historically lathes were powered by belts from a line shaft , modern examples uses electric motors. The workpiece extends out of the spindle along the axis of rotation above the flat bed. The carriage is a platform that can be moved, precisely and independently parallel and perpendicular to the axis of rotation. A hardened cutting tool

11875-685: The preservation of their objects. They displayed objects as well as their functions. One exhibit featured a historical printing press that a staff member used for visitors to create museum memorabilia. Some museums seek to reach a wide audience, such as a national or state museum, while others have specific audiences, like the LDS Church History Museum or local history organizations. Generally speaking, museums collect objects of significance that comply with their mission statement for conservation and display. Apart from questions of provenance and conservation, museums take into consideration

12000-422: The primary centers for innovative research in the United States well before the start of World War II . Nevertheless, museums to this day contribute new knowledge to their fields and continue to build collections that are useful for both research and display. The late twentieth century witnessed intense debate concerning the repatriation of religious, ethnic, and cultural artifacts housed in museum collections. In

12125-442: The private collections of wealthy individuals, families or institutions of art and rare or curious natural objects and artifacts . These were often displayed in so-called "wonder rooms" or cabinets of curiosities . These contemporary museums first emerged in western Europe, then spread into other parts of the world. Public access to these museums was often possible for the "respectable", especially to private art collections, but at

12250-775: The process of liberating metals from rock by heat became known, and rocks rich in copper, tin , and lead came into demand. These ores were mined wherever they were recognized. Remnants of such ancient mines have been found all over Southwestern Asia . Metalworking was being carried out by the South Asian inhabitants of Mehrgarh between 7000 and 3300 BCE. The end of the beginning of metalworking occurs sometime around 6000 BCE when copper smelting became common in Southwestern Asia. Ancient civilisations knew of seven metals. Here they are arranged in order of their oxidation potential (in volts ): The oxidation potential

12375-400: The project. Nonetheless, over 1.1 million people visited the museum in 2015, indicating it appeared to have paid off for the local government despite local backlash; key to this is the large demographic of foreign visitors to the museum, with 63% of the visitors residing outside of Spain and thus feeding foreign investment straight into Bilbao. A similar project to that undertaken in Bilbao was

12500-484: The public presentation of regularly scheduled programs and exhibits; Have a formal and appropriate program of documentation, care, and use of collections or objects; Carry out the above functions primarily at a physical facility or site; Have been open to the public for at least two years; Be open to the public at least 1,000 hours a year; Have accessioned 80 percent of its permanent collection; Have at least one paid professional staff with museum knowledge and experience; Have

12625-407: The public, accessible and inclusive, museums foster diversity and sustainability. They operate and communicate ethically, professionally and with the participation of communities, offering varied experiences for education, enjoyment, reflection and knowledge sharing." The Canadian Museums Association 's definition: "A museum is a non-profit, permanent establishment, that does not exist primarily for

12750-708: The purpose of conducting temporary exhibitions and that is open to the public during regular hours and administered in the public interest for the purpose of conserving, preserving, studying, interpreting, assembling and exhibiting to the public for the instruction and enjoyment of the public, objects and specimens or educational and cultural value including artistic, scientific, historical and technological material." The United Kingdom's Museums Association 's definition: "Museums enable people to explore collections for inspiration, learning and enjoyment. They are institutions that collect, safeguard and make accessible artifacts and specimens, which they hold in trust for society." While

12875-432: The respective peoples. By the above periods metalworkers were very skilled at creating objects of adornment, religious artifacts, and trade instruments of precious metals (non-ferrous), as well as weaponry usually of ferrous metals and/or alloys . These skills were well executed. The techniques were practiced by artisans, blacksmiths , atharvavedic practitioners, alchemists , and other categories of metalworkers around

13000-578: The ruler to display the amassed collections to guests and to visiting dignitaries. Also in Alexandria from the time of Ptolemy II Philadelphus (r. 285–246 BCE), was the first zoological park. At first used by Philadelphus in an attempt to domesticate African elephants for use in war, the elephants were also used for show along with a menagerie of other animals specimens including hartebeests , ostriches , zebras , leopards , giraffes , rhinoceros , and pythons . Early museums began as

13125-532: The specific machine. In many other European countries, standards following the ISO are used instead. In order to keep both the bit and material cool, a high temperature coolant is used. In most cases the coolant is sprayed from a hose directly onto the bit and material. This coolant can either be machine or user controlled, depending on the machine. Materials that can be milled range from aluminum to stainless steel and almost everything in between. Each material requires

13250-461: The study and education of the public. To city leaders, an active museum community can be seen as a gauge of the cultural or economic health of a city, and a way to increase the sophistication of its inhabitants. To museum professionals, a museum might be seen as a way to educate the public about the museum's mission, such as civil rights or environmentalism . Museums are, above all, storehouses of knowledge. In 1829, James Smithson's bequest funding

13375-451: The subject matter which now include content in the form of images, audio and visual effects, and interactive exhibits. Museum creation begins with a museum plan, created through a museum planning process. The process involves identifying the museum's vision and the resources, organization and experiences needed to realize this vision. A feasibility study, analysis of comparable facilities, and an interpretive plan are all developed as part of

13500-494: The type of collections they display, to include: fine arts , applied arts , craft , archaeology , anthropology and ethnology , biography , history , cultural history , science , technology , children's museums , natural history , botanical and zoological gardens . Within these categories, many museums specialize further, e.g., museums of modern art , folk art , local history , military history , aviation history , philately , agriculture , or geology . The size of

13625-513: The use of bronze and iron almost simultaneously. In the Americas it was different. Although the peoples of the Americas knew of metals, it was not until the European colonisation that metalworking for tools and weapons became common. Jewelry and art were the principal uses of metals in the Americas prior to European influence. About 2700 BCE, production of bronze was common in locales where

13750-471: The vast majority of collections. The Brooklyn Museum's Luce Center for American Art practices this open storage where the public can view items not on display, albeit with minimal interpretation. The practice of open storage is all part of an ongoing debate in the museum field of the role objects play and how accessible they should be. In terms of modern museums, interpretive museums, as opposed to art museums, have missions reflecting curatorial guidance through

13875-713: The way its subject matter existed at a certain point in time (e.g., the Anne Frank House and Colonial Williamsburg ). According to University of Florida Professor Eric Kilgerman, "While a museum in which a particular narrative unfolds within its halls is diachronic, those museums that limit their space to a single experience are called synchronic." In her book Civilizing the Museum , author Elaine Heumann Gurian proposes that there are five categories of museums based on intention and not content: object centered, narrative, client centered, community centered, and national. Museums can also be categorized into major groups by

14000-428: The whim of the owner and his staff. One way that elite men during this time period gained a higher social status in the world of elites was by becoming a collector of these curious objects and displaying them. Many of the items in these collections were new discoveries and these collectors or naturalists, since many of these people held interest in natural sciences, were eager to obtain them. By putting their collections in

14125-415: The workpiece axis is called facing. Producing surfaces using both radial and axial feeds is called profiling. A lathe is a machine tool which spins a block or cylinder of material so that when abrasive , cutting, or deformation tools are applied to the workpiece, it can be shaped to produce an object which has rotational symmetry about an axis of rotation . Examples of objects that can be produced on

14250-544: The world come from the Bulgarian Varna Necropolis and date from 4450 BCE. Not all metal required fire to obtain it or work it. Isaac Asimov speculated that gold was the "first metal". His reasoning being, that, by its chemistry , it is found in nature as nuggets of pure gold. In other words, gold, as rare as it is, is sometimes found in nature as a native metal . Some metals can also be found in meteors . Almost all other metals are found in ores ,

14375-475: The world offer some definitions as to what constitutes a museum, and their purpose. Common themes in all the definitions are public good and the care, preservation, and interpretation of collections. The International Council of Museums ' current definition of a museum (adopted in 2022): "A museum is a not-for-profit, permanent institution in the service of society that researches, collects, conserves, interprets and exhibits tangible and intangible heritage. Open to

14500-495: The z axis. It is possible to raise the table (where the workpiece rests). Milling machines may be operated manually or under computer numerical control (CNC), and can perform a vast number of complex operations, such as slot cutting, planing , drilling and threading , rabbeting , routing , etc. Two common types of mills are the horizontal mill and vertical mill. The pieces produced are usually complex 3D objects that are converted into x, y, and z coordinates that are then fed into

14625-540: Was "encyclopedic" in nature, reminiscent of that of Pliny, the Roman philosopher and naturalist. The idea was to consume and collect as much knowledge as possible, to put everything they collected and everything they knew in these displays. In time, however, museum philosophy would change and the encyclopedic nature of information that was so enjoyed by Aldrovandi and his cohorts would be dismissed as well as "the museums that contained this knowledge". The 18th-century scholars of

14750-435: Was a concern that large crowds could damage the artifacts. Prospective visitors to the British Museum had to apply in writing for admission, and small groups were allowed into the galleries each day. The British Museum became increasingly popular during the 19th century, amongst all age groups and social classes who visited the British Museum, especially on public holidays. The Ashmolean Museum , however, founded in 1677 from

14875-496: Was charged with organizing the Louvre as a national public museum and the centerpiece of a planned national museum system. As Napoléon I conquered the great cities of Europe, confiscating art objects as he went, the collections grew and the organizational task became more and more complicated. After Napoleon was defeated in 1815, many of the treasures he had amassed were gradually returned to their owners (and many were not). His plan

15000-531: Was interrupted by the First World War . After the Russian Revolution , in 1919 the Benois Building was completed. In 1930s it was assigned to the Russian museum. Today the collection shows Russian art from the 10th century up to the 21st century, covering all genres from the old Russian icon painting to contemporary art. All process on the restoration of works of art in the Russian Museum

15125-764: Was never fully realized, but his concept of a museum as an agent of nationalistic fervor had a profound influence throughout Europe. Chinese and Japanese visitors to Europe were fascinated by the museums they saw there, but had cultural difficulties in grasping their purpose and finding an equivalent Chinese or Japanese term for them. Chinese visitors in the early 19th century named these museums based on what they contained, so defined them as "bone amassing buildings" or "courtyards of treasures" or "painting pavilions" or "curio stores" or "halls of military feats" or "gardens of everything". Japan first encountered Western museum institutions when it participated in Europe's World's Fairs in

15250-649: Was realized in the late 19th and early 20th centuries (this is often called "The Museum Period" or "The Museum Age"). While many American museums, both natural history museums and art museums alike, were founded with the intention of focusing on the scientific discoveries and artistic developments in North America, many moved to emulate their European counterparts in certain ways (including the development of Classical collections from ancient Egypt , Greece , Mesopotamia , and Rome ). Drawing on Michel Foucault 's concept of liberal government, Tony Bennett has suggested

15375-807: Was the Louvre in Paris , opened in 1793 during the French Revolution , which enabled for the first time free access to the former French royal collections for people of all stations and status. The fabulous art treasures collected by the French monarchy over centuries were accessible to the public three days each " décade " (the 10-day unit which had replaced the week in the French Republican Calendar ). The Conservatoire du muséum national des Arts (National Museum of Arts's Conservatory)

15500-514: Was the discovery of a copper pendant in northern Iraq from 8,700 BCE. The earliest substantiated and dated evidence of metalworking in the Americas was the processing of copper in Wisconsin , near Lake Michigan . Copper was hammered until it became brittle, then heated so it could be worked further. In America, this technology is dated to about 4000–5000 BCE. The oldest gold artifacts in

15625-480: Was the stuffed body of the last dodo ever seen in Europe; but by 1755 the stuffed dodo was so moth-eaten that it was destroyed, except for its head and one claw. The museum opened on 24 May 1683, with naturalist Robert Plot as the first keeper. The first building, which became known as the Old Ashmolean , is sometimes attributed to Sir Christopher Wren or Thomas Wood. In France, the first public museum

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