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99-570: Today, it is the oldest university of mining and metallurgy in the world. The institution was established in 1765, during the Age of Enlightenment , by Prince Francis Xavier of Saxony based on plans by Friedrich Wilhelm von Oppel and Friedrich Anton von Heynitz . At the time, it was called the Kurfürstlich-Sächsische Bergakademie zu Freiberg (by 1806: Königlich-Sächsische Bergakademie zu Freiberg ). Its main purpose

198-426: A digital (i.e. computer-readable) format. The result is the representation of an object, image , sound , document , or signal (usually an analog signal ) obtained by generating a series of numbers that describe a discrete set of points or samples . The result is called digital representation or, more specifically, a digital image , for the object, and digital form , for the signal. In modern practice,

297-510: A 30% female share. Freiberg is a highly international university. Among its c. 3500 students, 41% are from foreign countries. There are double degree agreements with universities in China, France, Ghana, Italy, Poland, Russia, Thailand, and others. About 30% of the doctoral degrees awarded by the university are given to foreign students. Unlike other historical universities in Germany, TUBAF has

396-621: A Microsoft Word document or a social media post. In contrast, digitization only applies exclusively to analog materials. Born-digital materials present a unique challenge to digital preservation not only due to technological obsolescence but also because of the inherently unstable nature of digital storage and maintenance. Most websites last between 2.5 and 5 years, depending on the purpose for which they were designed. The Library of Congress provides numerous resources and tips for individuals looking to practice digitization and digital preservation for their personal collections. Digital reformatting

495-513: A burial site located in the western industrial zone of Varna , approximately 4 km from the city centre, internationally considered one of the key archaeological sites in world prehistory. The oldest gold treasure in the world, dating from 4,600 BC to 4,200 BC, was discovered at the site. The gold piece dating from 4,500 BC, found in 2019 in Durankulak , near Varna is another important example. Other signs of early metals are found from

594-461: A campus with most of its buildings and facilities in close proximity. The oldest buildings lie in the historic (medieval) city center, among these the The majority of the university's infrastructure can be found in the north of the city, including The two main parts are connected by a so-called 'corridor' of recent buildings and greenery. Additionally, a part of the university is located above and around

693-410: A ductile to brittle transition and lose their toughness, becoming more brittle and prone to cracking. Metals under continual cyclic loading can suffer from metal fatigue . Metals under constant stress at elevated temperatures can creep . Cold-working processes, in which the product's shape is altered by rolling, fabrication or other processes, while the product is cold, can increase the strength of

792-413: A liquid bath. Metallurgists study the microscopic and macroscopic structure of metals using metallography , a technique invented by Henry Clifton Sorby . In metallography, an alloy of interest is ground flat and polished to a mirror finish. The sample can then be etched to reveal the microstructure and macrostructure of the metal. The sample is then examined in an optical or electron microscope , and

891-401: A major concern. Cast irons, including ductile iron , are also part of the iron-carbon system. Iron-Manganese-Chromium alloys (Hadfield-type steels) are also used in non-magnetic applications such as directional drilling. Other engineering metals include aluminium , chromium , copper , magnesium , nickel , titanium , zinc , and silicon . These metals are most often used as alloys with

990-435: A point where a book is completely unusable. In theory, if these widely circulated titles are not treated with de-acidification processes, the materials upon those acid pages will be lost. As digital technology evolves, it is increasingly preferred as a method of preserving these materials, mainly because it can provide easier access points and significantly reduce the need for physical storage space. Cambridge University Library

1089-568: A public university, it has a relatively large private endowment. The university is home to one of the largest German university foundations. TU Bergakademie Freiberg is led by a rectorate, legislative decisions are made by the senate or extended senate. The rectorate consists of rector, chancellor, and two prorectors for Education and Research, respectively. The university has 6 subdivisions called faculties: In winter 2022/23 3,471 students were enrolled at TUBAF, 85% in MINT-programs, with

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1188-418: A science, called 'geognosis'. Thus, he laid the foundation for mineralogy and resource deposit theory. During his tenure, he attracted a wide range of students and peers, among them Alexander von Humboldt , Franz Xaver von Baader , Leopold von Buch , Friedrich Mohs , and Robert Jameson . Wilhelm August Lampadius (1772–1842) was a professor of chemistry and metallurgy. He installed the first gas light on

1287-627: A smelted copper axe dating from 5,500 BC, belonging to the Vinča culture . The Balkans and adjacent Carpathian region were the location of major Chalcolithic cultures including Vinča , Varna , Karanovo , Gumelnița and Hamangia , which are often grouped together under the name of ' Old Europe '. With the Carpatho-Balkan region described as the 'earliest metallurgical province in Eurasia', its scale and technical quality of metal production in

1386-542: A so-called ekasilicon. In the field of process engineering , Erich Rammler and Georg Bilkenroth were awarded the National Prize of the German Democratic Republic (1st class) for their work on lignite coke & coal gasification in 1951. The university has defined core fields that create a unique profile in education and research: Exploring, researching, and (resourceful) use of

1485-579: A superior metal could be made, an alloy called bronze . This represented a major technological shift known as the Bronze Age . The extraction of iron from its ore into a workable metal is much more difficult than for copper or tin. The process appears to have been invented by the Hittites in about 1200 BC, beginning the Iron Age . The secret of extracting and working iron was a key factor in

1584-589: A university strong point. In March 1993, then Technische Hochschule Bergakademie Freiberg was renamed Technische Universität Bergakademie Freiberg , underlining its increased status and significance. Today, TUBAF is a modern & environmentally focused university, internationally recognized as a "university of closed resource cycles". The university's history is presented in the Historicum through numerous exhibits, paintings and photographs, and documents. The Forum for Mining History ( Forum Montangeschichte )

1683-658: A video tape player to be connected to a computer while the item plays in real time. Slides can be digitized quicker with a slide scanner such as the Nikon Coolscan 5000ED. Another example of digitization is the VisualAudio process developed by the Swiss Fonoteca Nazionale in Lugano , by scanning a high resolution photograph of a record, they are able to extract and reconstruct the sound from

1782-401: Is a chemical surface-treatment technique. It involves bonding a thin layer of another metal such as gold , silver , chromium or zinc to the surface of the product. This is done by selecting the coating material electrolyte solution, which is the material that is going to coat the workpiece (gold, silver, zinc). There needs to be two electrodes of different materials: one the same material as

1881-426: Is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements , their inter-metallic compounds , and their mixtures, which are known as alloys . Metallurgy encompasses both the science and the technology of metals, including the production of metals and the engineering of metal components used in products for both consumers and manufacturers. Metallurgy

1980-443: Is an industrial coating process that consists of a heat source (flame or other) and a coating material that can be in a powder or wire form, which is melted then sprayed on the surface of the material being treated at a high velocity. The spray treating process is known by many different names such as HVOF (High Velocity Oxygen Fuel), plasma spray, flame spray, arc spray and metalizing. Electroless deposition (ED) or electroless plating

2079-427: Is central to making digital representations of geographical features, using raster or vector images, in a geographic information system , i.e., the creation of electronic maps , either from various geographical and satellite imaging (raster) or by digitizing traditional paper maps or graphs (vector). "Digitization" is also used to describe the process of populating databases with files or data. While this usage

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2178-708: Is collected and processed to extract valuable metals. Ore bodies often contain more than one valuable metal. Tailings of a previous process may be used as a feed in another process to extract a secondary product from the original ore. Additionally, a concentrate may contain more than one valuable metal. That concentrate would then be processed to separate the valuable metals into individual constituents. Much effort has been placed on understanding iron –carbon alloy system, which includes steels and cast irons . Plain carbon steels (those that contain essentially only carbon as an alloying element) are used in low-cost, high-strength applications, where neither weight nor corrosion are

2277-455: Is defined as the autocatalytic process through which metals and metal alloys are deposited onto nonconductive surfaces. These nonconductive surfaces include plastics, ceramics, and glass etc., which can then become decorative, anti-corrosive, and conductive depending on their final functions. Electroless deposition is a chemical processes that create metal coatings on various materials by autocatalytic chemical reduction of metal cations in

2376-414: Is distinct from the craft of metalworking . Metalworking relies on metallurgy in a similar manner to how medicine relies on medical science for technical advancement. A specialist practitioner of metallurgy is known as a metallurgist. The science of metallurgy is further subdivided into two broad categories: chemical metallurgy and physical metallurgy . Chemical metallurgy is chiefly concerned with

2475-635: Is done once with the technology currently available, while digital preservation is more complicated because technology changes so quickly that a once popular storage format may become obsolete before it breaks. An example is a 5 1/4" floppy drive, computers are no longer made with them and obtaining the hardware to convert a file stored on 5 1/4" floppy disc can be expensive. To combat this risk, equipment must be upgraded as newer technology becomes affordable (about 2 to 5 years), but before older technology becomes unobtainable (about 5 to 10 years). Digital preservation can also apply to born-digital material, such as

2574-503: Is fed into an embroidery machine and applied to the fabric. The most supported format is DST file. Apparel companies also digitize clothing patterns. Analog signals are continuous electrical signals; digital signals are non-continuous. Analog signals can be converted to digital signals by using an analog-to-digital converter . The process of converting analog to digital consists of two parts: sampling and quantizing. Sampling measures wave amplitudes at regular intervals, splits them along

2673-654: Is found in the Balkans and Carpathian Mountains , as evidenced by findings of objects made by metal casting and smelting dated to around 6000-5000 BC. Certain metals, such as tin, lead, and copper can be recovered from their ores by simply heating the rocks in a fire or blast furnace in a process known as smelting. The first evidence of copper smelting, dating from the 6th millennium BC, has been found at archaeological sites in Majdanpek , Jarmovac and Pločnik , in present-day Serbia . The site of Pločnik has produced

2772-413: Is often described as converting it from analog to digital, however both copies remain. An example would be scanning a photograph and having the original piece in a photo album and a digital copy saved to a computer. This is essentially the first step in digital preservation which is to maintain the digital copy over a long period of time and making sure it remains authentic and accessible. Digitization

2871-435: Is one of two German institutions, where scientific divers are trained. TU Bergakademie Freiberg has an extensive network of regional and national cooperation partners in science and industry. These include, among others, affiliated institutes as independent research facilities that cooperate with the university and complement its teaching and research offerings. These include:    Metallurgy Metallurgy

2970-571: Is performance-based and without tuition fees (as usual for consecutive studies at German public universities); students pay a registration fee of €94 per semester, of which €7 is dedicated solely to the Student Body (Council). 13 masters programs (date: WS 2022/23) are taught in English: Freiberg University of Mining and Technology has been ranked among the best universities worldwide for mining engineering . Though

3069-1058: Is recognized worldwide for its expertise in geo and materials science. TUBAF is in the Top 10 of universities in Germany based on thrd-party (private) funding per professor, according to a 2022 study. A number of patents and inventions by TUBAF-based researchers are recognized each year. With SAXEED , a founders network, start-ups are being supported. The program has helped several successful companies like NaPaGen GmbH , Just in Time-Food GmbH and Rockfeel GmbH. The university offers programs taught in German, as well as international programs entirely taught in English. All in all, there are 75 programs. Among those are unique ones, such as Applied Natural Sciences, Industrial Archeology, Mine-Surveying, and Chemistry (Diplom), which are taught in German. Admission to all programs from Bachelor through Ph.D.

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3168-506: Is responsible for digitizing and publishing historic essays and publications concerning Saxony's historical mining and metallurgical industry. A number of known figures studied and/or lectured at the Bergakademie: Abraham Gottlob Werner (1749–1817) was a highly influential lecturer and scientist, who systematized minerals and rock formations. He is considered the founder of an early form of geology as

3267-659: Is still used by institutions such as the National Archives and Records Administration ( NARA ) to provide preservation and access to these resources. While digital versions of analog texts can potentially be accessed from anywhere in the world, they are not as stable as most print materials or manuscripts and are unlikely to be accessible decades from now without further preservation efforts, while many books manuscripts and scrolls have already been around for centuries. However, for some materials that have been damaged by water, insects, or catastrophes, digitization might be

3366-442: Is technically inaccurate, it originates with the previously proper use of the term to describe that part of the process involving digitization of analog sources, such as printed pictures and brochures, before uploading to target databases. Digitizing may also be used in the field of apparel, where an image may be recreated with the help of embroidery digitizing software tools and saved as embroidery machine code. This machine code

3465-545: Is the more common one in the United Kingdom . The / ˈ m ɛ t əl ɜːr dʒ i / pronunciation is the more common one in the United States US and is the first-listed variant in various American dictionaries, including Merriam-Webster Collegiate and American Heritage . The earliest metal employed by humans appears to be gold , which can be found " native ". Small amounts of natural gold, dating to

3564-437: Is the oldest and still operational University of Mining and Technology. After the École des Ponts et Chaussées , which was established in 1747, it is also the second oldest institution of higher learning with focus on STEM-research ( university of technology ). The chemical elements indium (1863) and germanium (1886) were discovered by scientists of Freiberg University. The polymath Alexander von Humboldt studied mining at

3663-406: Is the primary way of storing images in a form suitable for transmission and computer processing, whether scanned from two-dimensional analog originals or captured using an image sensor -equipped device such as a digital camera , tomographical instrument such as a CAT scanner , or acquiring precise dimensions from a real-world object, such as a car , using a 3D scanning device. Digitizing

3762-517: Is the process of converting analog materials into a digital format as a surrogate of the original. The digital surrogates perform a preservation function by reducing or eliminating the use of the original. Digital reformatting is guided by established best practices to ensure that materials are being converted at the highest quality. The Library of Congress has been actively reformatting materials for its American Memory project and developed best standards and practices pertaining to book handling during

3861-514: Is to ensure that the digital files themselves are preserved and remain accessible; the term " digital preservation ," in its most basic sense, refers to an array of activities undertaken to maintain access to digital materials over time. The prevalent Brittle Books issue facing libraries across the world is being addressed with a digital solution for long term book preservation. Since the mid-1800s, books were printed on wood-pulp paper , which turns acidic as it decays. Deterioration may advance to

3960-477: Is unique and workflows for one will be different from every other project that goes through the process, so time must be spent thoroughly studying and planning each one to create the best plan for the materials and the intended audience. Cost of equipment, staff time, metadata creation, and digital storage media make large scale digitization of collections expensive for all types of cultural institutions . Ideally, all institutions want their digital copies to have

4059-453: Is used to describe, for example, the scanning of analog sources (such as printed photos or taped videos ) into computers for editing, 3D scanning that creates 3D modeling of an object's surface, and audio (where sampling rate is often measured in kilohertz ) and texture map transformations. In this last case, as in normal photos, the sampling rate refers to the resolution of the image, often measured in pixels per inch. Digitizing

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4158-664: Is working on the Cambridge Digital Library , which will initially contain digitised versions of many of its most important works relating to science and religion. These include examples such as Isaac Newton's personally annotated first edition of his Philosophiæ Naturalis Principia Mathematica as well as college notebooks and other papers, and some Islamic manuscripts such as a Quran from Tipu Sahib's library. Google, Inc. has taken steps towards attempting to digitize every title with " Google Book Search ". While some academic libraries have been contracted by

4257-494: The Bergakademie from 1791 to 1792, as did the poet Novalis from 1797 to 1799. In 1899, it was incorporated as a Technische Hochschule . In 1905, Bergakademie gained the right to grant doctorates in engineering (Dr.-Ing.), and in 1939 for natural sciences (Dr. rer. nat.). In 1940, two novel faculties (divisions) where established: Natural Sciences and Mining & Metallurgy. In 1956, another faculty concerning economy

4356-857: The West German system of higher education, Bergakademie quickly found a prime position as "The University of Resources". As the first East German University, it joined the German Research Foundation . In connection, the social sciences section were eliminated, while a faculty for economics was restructured and expanded to 15 professorships. One of the emerging focus points in research was semiconductors , which led to corporations settling in and around Freiberg. These include Siltronic AG , Meyer Burger Technology AG , and JT Energy Systems, specializing in semiconductors, solar power , and lithium-ion batteries , respectively. Besides geo- and materials sciences , environmental science became

4455-608: The "Lehr- und Forschungsbergwerk Reiche Zeche", a historical mine, operated today as a teaching and research facility. Other infrastructure includes the university sports centre, Lessing-Bau and the Scientific Diving Center. Through its specialization, TUBAF has created a number of institutions, centers, and facilities with state-of-the-art research equipment. Unique in Europe is the still operational mine for teaching as well as underground exploration research. TUBAF

4554-527: The 6th–5th millennia BC totally overshadowed that of any other contemporary production centre. The earliest documented use of lead (possibly native or smelted) in the Near East dates from the 6th millennium BC, is from the late Neolithic settlements of Yarim Tepe and Arpachiyah in Iraq . The artifacts suggest that lead smelting may have predated copper smelting. Metallurgy of lead has also been found in

4653-664: The Balkans during the same period. Copper smelting is documented at sites in Anatolia and at the site of Tal-i Iblis in southeastern Iran from c. 5000 BC. Copper smelting is first documented in the Delta region of northern Egypt in c. 4000 BC, associated with the Maadi culture . This represents the earliest evidence for smelting in Africa. The Varna Necropolis , Bulgaria , is

4752-520: The European continent and advanced the technology to an industrial scale. Also, Lampadius founded the world's first chemical research laboratory in a university in 1796/97. The poet Novalis (1772–1801; Georg Philipp Friedrich von Hardenberg) studied in Freiberg from 1797 through 1799. He also created his pseudonym for his literary works during this time. Many topics and themes of his work came from

4851-455: The access to college was directed by central authorities. Additionally, children of "workers & farmers", who traditionally didn't pursued tertiary education , were supported by having a college preparation institute ( Arbeiter-und-Bauern-Fakultät (ABF) "Wilhelm Pieck"). In the aftermath of German reunification , the infrastructure and academic body were reorganized in order to fit the new political circumstances. After its incorporation into

4950-438: The amount of phases present as well as the degree of strain to which a sample has been subjected. Current advanced characterization techniques, which are used frequently in this field are: Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Electron Backscattered Diffraction (EBSD) and Atom-Probe Tomography (APT). Digitizing Digitization is the process of converting information into

5049-492: The best image quality so a high-quality copy can be maintained over time. In the mid-long term, digital storage would be regarded as the more expensive part to maintain the digital archives due to the increasing number of scanning requests. However, smaller institutions may not be able to afford such equipment or manpower, which limits how much material can be digitized, so archivists and librarians must know what their patrons need and prioritize digitization of those items. To help

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5148-416: The coating material and one that is receiving the coating material. Two electrodes are electrically charged and the coating material is stuck to the work piece. It is used to reduce corrosion as well as to improve the product's aesthetic appearance. It is also used to make inexpensive metals look like the more expensive ones (gold, silver). Shot peening is a cold working process used to finish metal parts. In

5247-449: The digital preservation field. Sometimes digitization and digital preservation are mistaken for the same thing. They are different, but digitization is often a vital first step in digital preservation. Libraries, archives, museums, and other memory institutions digitize items to preserve fragile materials and create more access points for patrons. Doing this creates challenges for information professionals and solutions can be as varied as

5346-461: The digitization process, scanning resolutions, and preferred file formats. Some of these standards are: A list of archival standards for digital preservation can be found on the ARL website. The Library of Congress has constituted a Preservation Digital Reformatting Program. The Three main components of the program include: Audio media offers a rich source of historic ethnographic information, with

5445-454: The digitized data is in the form of binary numbers , which facilitates processing by digital computers and other operations, but digitizing simply means "the conversion of analog source material into a numerical format"; the decimal or any other number system can be used instead. Digitization is of crucial importance to data processing, storage, and transmission, because it "allows information of all kinds in all formats to be carried with

5544-855: The earliest forms of recorded sound dating back to 1890. According to the International Association of Sound and Audiovisual Archives (IASA), these sources of audio data, as well as the aging technologies used to play them back, are in imminent danger of permanent loss due to degradation and obsolescence. These primary sources are called “carriers” and exist in a variety of formats, including wax cylinders, magnetic tape, and flat discs of grooved media, among others. Some formats are susceptible to more severe, or quicker, degradation than others. For instance, lacquer discs suffer from delamination . Analog tape may deteriorate due to sticky shed syndrome . Archival workflow and file standardization have been developed to minimize loss of information from

5643-421: The energy sector is another topic. Environmental sciences focus on safety and conservation aspects, e.g. of drinking water, as well as on processes in the primary and energy industry. Engineers work on future-oriented solutions, novel products, and optimization of already existing processes & methods. Their studies include applied research as well as foundational questions. Economic topics arise from all of

5742-491: The expectation that everything should already be online. The time spent planning, doing the work, and processing the digital files along with the expense and fragility of some materials are some of the most common. Digitization is a time-consuming process, even more so when the condition or format of the analog resources requires special handling. Deciding what part of a collection to digitize can sometimes take longer than digitizing it in its entirety. Each digitization project

5841-402: The field can attend conferences and join organizations and working groups to keep their knowledge current and add to the conversation. The term digitization is often used when diverse forms of information, such as an object, text, sound, image, or voice, are converted into a single binary code . The core of the process is the compromise between the capturing device and the player device so that

5940-477: The fields mentioned above. Therefore, researchers in this field work on projects in pure economic disciplines and interdisciplinary projects alike. TUBAF describes itself as a modern research university, especially focused on current and future ecological and econonmical challenges. Interdisciplinary research is emphasized. Most investigated topics revolve around alternative methods in resource extraction, energy systems, compound materials and recycling. The university

6039-619: The highly developed and complex processes of mining metal ores, metal extraction, and metallurgy of the time. Agricola has been described as the "father of metallurgy". Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form. In order to convert a metal oxide or sulphide to a purer metal, the ore must be reduced physically, chemically , or electrolytically . Extractive metallurgists are interested in three primary streams: feed, concentrate (metal oxide/sulphide) and tailings (waste). After mining, large pieces of

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6138-402: The image contrast provides details on the composition, mechanical properties, and processing history. Crystallography , often using diffraction of x-rays or electrons , is another valuable tool available to the modern metallurgist. Crystallography allows identification of unknown materials and reveals the crystal structure of the sample. Quantitative crystallography can be used to calculate

6237-483: The information institutions to better decide the archives worth of digitization, Casablancas and other researchers used a proposed model to investigate the impact of different digitization strategies on the decrease in access requests in the archival and library reading rooms. Often the cost of time and expertise involved with describing materials and adding metadata is more than the digitization process. Some materials, such as brittle books, are so fragile that undergoing

6336-579: The institutions that implement them. Some analog materials, such as audio and video tapes, are nearing the end of their life cycle, and it is important to digitize them before equipment obsolescence and media deterioration makes the data irretrievable. There are challenges and implications surrounding digitization including time, cost, cultural history concerns, and creating an equitable platform for historically marginalized voices. Many digitizing institutions develop their own solutions to these challenges. Mass digitization projects have had mixed results over

6435-401: The items for digital collections. It can be time consuming to make sure all potential copyright holders have given permission, but if copyright cannot be determined or cleared, it may be necessary to restrict even digital materials to in library use. Institutions can make digitization more cost-effective by planning before a project begins, including outlining what they hope to accomplish and

6534-508: The joining of metals (including welding , brazing , and soldering ). Emerging areas for metallurgists include nanotechnology , superconductors , composites , biomedical materials , electronic materials (semiconductors) and surface engineering . Metallurgy derives from the Ancient Greek μεταλλουργός , metallourgós , "worker in metal", from μέταλλον , métallon , "mine, metal" + ἔργον , érgon , "work" The word

6633-560: The late Paleolithic period, 40,000 BC, have been found in Spanish caves. Silver , copper , tin and meteoric iron can also be found in native form, allowing a limited amount of metalworking in early cultures. Early cold metallurgy, using native copper not melted from mineral has been documented at sites in Anatolia and at the site of Tell Maghzaliyah in Iraq , dating from the 7th/6th millennia BC. The earliest archaeological support of smelting (hot metallurgy) in Eurasia

6732-715: The minimum amount of equipment, time, and effort that can meet those goals. If a budget needs more money to cover the cost of equipment or staff, an institution might investigate if grants are available. Collaborations between institutions have the potential to save money on equipment, staff, and training as individual members share their equipment, manpower, and skills rather than pay outside organizations to provide these services. Collaborations with donors can build long-term support of current and future digitization projects. Outsourcing can be an option if an institution does not want to invest in equipment but since most vendors require an inventory and basic metadata for materials, this

6831-415: The mining culture surrounding him. The polymath Alexander von Humboldt enrolled on 14 June 1791 and went through a rather short, but intense program, qualifying him in natural sciences and metallurgy. He took a special interest in developing appliances, such as the "Licht-Erhalter". One of Humboldt's most famous discoveries was the vegetation underground, published in 1793 as "Flora Fribergensis". Many of

6930-553: The noted exception of silicon, which is not a metal. Other forms include: In production engineering , metallurgy is concerned with the production of metallic components for use in consumer or engineering products. This involves production of alloys, shaping, heat treatment and surface treatment of product. The task of the metallurgist is to achieve balance between material properties, such as cost, weight , strength , toughness , hardness , corrosion , fatigue resistance and performance in temperature extremes. To achieve this goal,

7029-432: The number of possible values of the signal at a given time , as well as in the number of points in the signal in a given period of time. However, digital signals are discrete in both of those respects – generally a finite sequence of integers – therefore a digitization can, in practical terms, only ever be an approximation of the signal it represents. Digitization occurs in two parts: In general, these can occur at

7128-402: The only option for continued use. In the context of libraries, archives, and museums, digitization is a means of creating digital surrogates of analog materials, such as books, newspapers, microfilm and videotapes, offers a variety of benefits, including increasing access, especially for patrons at a distance; contributing to collection development, through collaborative initiatives; enhancing

7227-512: The operating environment must be carefully considered. Determining the hardness of the metal using the Rockwell, Vickers, and Brinell hardness scales is a commonly used practice that helps better understand the metal's elasticity and plasticity for different applications and production processes. In a saltwater environment, most ferrous metals and some non-ferrous alloys corrode quickly. Metals exposed to cold or cryogenic conditions may undergo

7326-482: The ore feed are broken through crushing or grinding in order to obtain particles small enough, where each particle is either mostly valuable or mostly waste. Concentrating the particles of value in a form supporting separation enables the desired metal to be removed from waste products. Mining may not be necessary, if the ore body and physical environment are conducive to leaching . Leaching dissolves minerals in an ore body and results in an enriched solution. The solution

7425-452: The original carrier to the resulting digital file as digitization is underway. For most at-risk formats (magnetic tape, grooved cylinders, etc.), a similar workflow can be observed. Examination of the source carrier will help determine what, if any, steps need to be taken to repair material prior to transfer. A similar inspection must be undertaken for the playback machines. If satisfactory conditions are met for both carrier and playback machine,

7524-402: The piece being treated. The compression stress in the surface of the material strengthens the part and makes it more resistant to fatigue failure, stress failures, corrosion failure, and cracking. Thermal spraying techniques are another popular finishing option, and often have better high temperature properties than electroplated coatings. Thermal spraying, also known as a spray welding process,

7623-401: The plants described were discovered and characterized by him. 1848 to 1851, Gustav Anton Zeuner studied in Freiberg. He later went on to lay the groundwork for thermodynamics as field of study in engineering. Karl Heinrich Adolf Bernhard Ledebur was one of the first to study processes in metallurgy and ironwork empirically with modern scientific tools and methods. During his tenure, he founded

7722-434: The potential for research and education; and supporting preservation activities. Digitization can provide a means of preserving the content of the materials by creating an accessible facsimile of the object in order to put less strain on already fragile originals. For sounds, digitization of legacy analog recordings is essential insurance against technological obsolescence. A fundamental aspect of planning digitization projects

7821-509: The process of digitization could damage them irreparably. Despite potential damage, one reason for digitizing fragile materials is because they are so heavily used that creating a digital surrogate will help preserve the original copy long past its expected lifetime and increase access to the item. Copyright is not only a problem faced by projects like Google Books , but by institutions that may need to contact private citizens or institutions mentioned in archival documents for permission to scan

7920-445: The process of shot peening, small round shot is blasted against the surface of the part to be finished. This process is used to prolong the product life of the part, prevent stress corrosion failures, and also prevent fatigue. The shot leaves small dimples on the surface like a peen hammer does, which cause compression stress under the dimple. As the shot media strikes the material over and over, it forms many overlapping dimples throughout

8019-653: The processed image. Digitization of analog tapes before they degrade, or after damage has already occurred, can rescue the only copies of local and traditional cultural music for future generations to study and enjoy. Academic and public libraries, foundations, and private companies like Google are scanning older print books and applying optical character recognition (OCR) technologies so they can be keyword searched, but as of 2006, only about 1 in 20 texts had been digitized. Librarians and archivists are working to increase this statistic and in 2019 began digitizing 480,000 books published between 1923 and 1964 that had entered

8118-666: The product by a process called work hardening . Work hardening creates microscopic defects in the metal, which resist further changes of shape. Metals can be heat-treated to alter the properties of strength, ductility, toughness, hardness and resistance to corrosion. Common heat treatment processes include annealing, precipitation strengthening , quenching, and tempering: Often, mechanical and thermal treatments are combined in what are known as thermo-mechanical treatments for better properties and more efficient processing of materials. These processes are common to high-alloy special steels, superalloys and titanium alloys. Electroplating

8217-1008: The production of metals. Metal production begins with the processing of ores to extract the metal, and includes the mixture of metals to make alloys . Metal alloys are often a blend of at least two different metallic elements. However, non-metallic elements are often added to alloys in order to achieve properties suitable for an application. The study of metal production is subdivided into ferrous metallurgy (also known as black metallurgy ) and non-ferrous metallurgy , also known as colored metallurgy. Ferrous metallurgy involves processes and alloys based on iron , while non-ferrous metallurgy involves processes and alloys based on other metals. The production of ferrous metals accounts for 95% of world metal production. Modern metallurgists work in both emerging and traditional areas as part of an interdisciplinary team alongside material scientists and other engineers. Some traditional areas include mineral processing, metal production, heat treatment, failure analysis , and

8316-416: The public domain. Unpublished manuscripts and other rare papers and documents housed in special collections are being digitized by libraries and archives , but backlogs often slow this process and keep materials with enduring historical and research value hidden from most users (see digital libraries ). Digitization has not completely replaced other archival imaging options, such as microfilming which

8415-641: The reduction and oxidation of metals, and the chemical performance of metals. Subjects of study in chemical metallurgy include mineral processing , the extraction of metals , thermodynamics , electrochemistry , and chemical degradation ( corrosion ). In contrast, physical metallurgy focuses on the mechanical properties of metals, the physical properties of metals, and the physical performance of metals. Topics studied in physical metallurgy include crystallography , material characterization , mechanical metallurgy, phase transformations , and failure mechanisms . Historically, metallurgy has predominately focused on

8514-511: The rendered result represents the original source with the most possible fidelity, and the advantage of digitization is the speed and accuracy in which this form of information can be transmitted with no degradation compared with analog information. Digital information exists as one of two digits, either 0 or 1. These are known as bits (a contraction of binary digits ) and the sequences of 0s and 1s that constitute information are called bytes . Analog signals are continuously variable, both in

8613-404: The same efficiency and also intermingled." Though analog data is typically more stable, digital data has the potential to be more easily shared and accessed and, in theory, can be propagated indefinitely without generation loss, provided it is migrated to new, stable formats as needed . This potential has led to institutional digitization projects designed to improve access and the rapid growth of

8712-420: The same time, though they are conceptually distinct. A series of digital integers can be transformed into an analog output that approximates the original analog signal. Such a transformation is called a digital-to-analog conversion . The sampling rate and the number of bits used to represent the integers combine to determine how close such an approximation to the analog signal a digitization will be. The term

8811-462: The service, issues of copyright law violations threaten to derail the project. However, it does provide – at the very least – an online consortium for libraries to exchange information and for researchers to search for titles as well as review the materials. Digitizing something is not the same as digitally preserving it. To digitize something is to create a digital surrogate (copy or format) of an existing analog item (book, photograph, or record) and

8910-787: The success of the Philistines . Historical developments in ferrous metallurgy can be found in a wide variety of past cultures and civilizations. This includes the ancient and medieval kingdoms and empires of the Middle East and Near East , ancient Iran , ancient Egypt , ancient Nubia , and Anatolia in present-day Turkey , Ancient Nok , Carthage , the Celts , Greeks and Romans of ancient Europe , medieval Europe, ancient and medieval China , ancient and medieval India , ancient and medieval Japan , amongst others. A 16th century book by Georg Agricola , De re metallica , describes

9009-538: The system Earth is the focal point of TUBAF's geosciences. The work is based on innovative and novel technologies, e.g. for finding resources, extracting them without unnecessary destruction, and resourceful processing. Innovative materials for today's problems and uses are being developed. This includes the making, as well as recycling of these materials. In this field, scientists develop new, green solutions to energy problems. Production, use, and storage of energy are researched in conjunction. Additionally, digitisation of

9108-568: The third millennium BC in Palmela , Portugal, Los Millares , Spain, and Stonehenge , United Kingdom. The precise beginnings, however, have not be clearly ascertained and new discoveries are both continuous and ongoing. In approximately 1900 BC, ancient iron smelting sites existed in Tamil Nadu . In the Near East , about 3,500 BC, it was discovered that by combining copper and tin,

9207-547: The transfer can take place, moderated by an analog-to-digital converter . The digital signal is then represented visually for the transfer engineer by a digital audio workstation , like Audacity, WaveLab, or Pro Tools. Reference access copies can be made at smaller sample rates. For archival purposes, it is standard to transfer at a sample rate of 96 kHz and a bit depth of 24 bits per channel. Many libraries, archives, museums, and other memory institutions, struggle with catching up and staying current regarding digitization and

9306-482: The university's iron laboratory. In 1863, the chemical element indium was discovered by chemist Hieronymus Theodor Richter (1824–1898) and physicist Ferdinand Reich (1799–1882), naming it after its indigo-blue colored flame. In 1886, chemistry professor Clemens Alexander Winkler (1838–1904) isolated the element germanium for the first time while analyzing the rather uncommon mineral argyrodite . This proved Dmitri Mendeleev 's periodic table and his prediction of

9405-631: The vertical axis, and assigns them a numerical value, while quantizing looks for measurements that are between binary values and rounds them up or down. Nearly all recorded music has been digitized, and about 12 percent of the 500,000+ movies listed on the Internet Movie Database are digitized and were released on DVD . Digitization of home movies , slides , and photographs is a popular method of preserving and sharing personal multimedia. Slides and photographs may be scanned quickly using an image scanner , but analog video requires

9504-571: The years, but some institutions have had success even if not in the traditional Google Books model. Although e-books have undermined the sales of their printed counterparts, a study from 2017 indicated that the two cater to different audiences and use-cases. In a study of over 1400 university students it was found that physical literature is more apt for intense studies while e-books provide a superior experience for leisurely reading. Technological changes can happen often and quickly, so digitization standards are difficult to keep updated. Professionals in

9603-482: Was added. After World War II , education of future engineers and scientists, as well as research were quickly re-established in order to (re-) build primary industry in the Soviet Occupation Zone / GDR . The campus and faculty-staff were expanded rapidly. The educational direction changed through establishing novel courses. Also, the student demographics changed (percentage of women increased), since

9702-434: Was originally an alchemist 's term for the extraction of metals from minerals, the ending -urgy signifying a process, especially manufacturing: it was discussed in this sense in the 1797 Encyclopædia Britannica . In the late 19th century, metallurgy's definition was extended to the more general scientific study of metals, alloys, and related processes. In English , the / m ɛ ˈ t æ l ər dʒ i / pronunciation

9801-654: Was the education of highly skilled miners and scientists in fields connected to mining and metallurgy. There had developed a need for mining, as an industry to regenerate Saxony's economy, since Saxony had been defeated in the Seven Years' War . Before the establishment of the Bergakademie (mining school), four similar institutions had been founded in other countries: Potosí , Bolivia (1557–1786); Kongsberg, Norway (1757–1814); Schemnitz , today's Slovakia ( Banská Štiavnica , 1762–1919); and Prague (1762–1772). Since these do not exist anymore, Freiberg University

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