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115-419: A sheet of carbon paper is placed between two or more sheets of paper. The pressure applied by the writing implement (pen, pencil, typewriter or impact printer ) to the top sheet causes pigment from the carbon paper to reproduce the similar mark on the copy sheet(s). More than one copy can be made by stacking several sheets with carbon paper between each pair. Four or five copies is a practical limit. The top sheet

230-467: A network and can print at speeds of 45 to around 100 ppm. The Xerox 9700 could achieve 120 ppm. An ID Card printer is used for printing plastic ID cards. These can now be customised with important features such as holographic overlays, HoloKotes and watermarks. This is either a direct to card printer (the more feasible option) or a retransfer printer. A virtual printer is a piece of computer software whose user interface and API resembles that of

345-451: A printer is a peripheral machine which makes a durable representation of graphics or text, usually on paper . While most output is human-readable, bar code printers are an example of an expanded use for printers. Different types of printers include 3D printers, inkjet printers, laser printers, and thermal printers. The first computer printer designed was a mechanically driven apparatus by Charles Babbage for his difference engine in

460-454: A typewriter ), or, less commonly, hits the back of the paper, pressing the paper against the ink ribbon (the IBM 1403 for example). All but the dot matrix printer rely on the use of fully formed characters , letterforms that represent each of the characters that the printer was capable of printing. In addition, most of these printers were limited to monochrome, or sometimes two-color, printing in

575-406: A typewriter . A hammer strikes a wheel with petals, the "daisy wheel", each petal containing a letter form at its tip. The letter form strikes a ribbon of ink , depositing the ink on the page and thus printing a character. By rotating the daisy wheel, different characters are selected for printing. These printers were also referred to as letter-quality printers because they could produce text which

690-486: A xerographic printing process but differ from analog photocopiers in that the image is produced by the direct scanning of a laser beam across the printer's photoreceptor . Another toner-based printer is the LED printer which uses an array of LEDs instead of a laser to cause toner adhesion to the print drum. Inkjet printers operate by propelling variably sized droplets of liquid ink onto almost any sized page. They are

805-546: A broader syllabus and more interest in applications; but William Whewell found the programme unacceptable. A controversy Babbage had with Richard Jones lasted for six years. He never did give a lecture. It was during this period that Babbage tried to enter politics. Simon Schaffer writes that his views of the 1830s included disestablishment of the Church of England , a broader political franchise , and inclusion of manufacturers as stakeholders. He twice stood for Parliament as

920-415: A brochure. As of the 2020s, 3D printing has become a widespread hobby due to the abundance of cheap 3D printer kits, with the most common process being Fused deposition modeling . Personal printers are mainly designed to support individual users, and may be connected to only a single computer. These printers are designed for low-volume, short-turnaround print jobs , requiring minimal setup time to produce

1035-531: A candidate for the borough of Finsbury . In 1832 he came in third among five candidates, missing out by some 500 votes in the two-member constituency when two other reformist candidates, Thomas Wakley and Christopher Temple, split the vote. In his memoirs Babbage related how this election brought him the friendship of Samuel Rogers : his brother Henry Rogers wished to support Babbage again, but died within days. In 1834 Babbage finished last among four. In 1832, Babbage, Herschel and Ivory were appointed Knights of

1150-407: A chemical coated paper, which is charged by the print head according to the image of the document. The paper is passed near a pool of liquid ink with the opposite charge. The charged areas of the paper attract the ink and thus form the image. This process was developed from the process of electrostatic copying . Color reproduction is very accurate, and because there is no heating the scale distortion

1265-445: A cheque must be printed using MICR toner or ink. Banks and other clearing houses employ automation equipment that relies on the magnetic flux from these specially printed characters to function properly. The following printing technologies are routinely found in modern printers: A laser printer rapidly produces high quality text and graphics. As with digital photocopiers and multifunction printers (MFPs), laser printers employ

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1380-444: A company does not already have a local (or network) printer that has the features they need, then the web-based option is a perhaps a more affordable solution. The web-based solution is good for small businesses that do not anticipate a lot of rapid growth, or organizations who either can not afford a card printer, or do not have the resources to learn how to set up and use one. Generally speaking, desktop-based solutions involve software,

1495-645: A considerable increase in durability and a greater degree of counterfeit prevention. Some card printers come with an option to print both sides at the same time, which cuts down the time taken to print and less margin of error. In such printers one side of id card is printed and then the card is flipped in the flip station and other side is printed. Alongside the traditional uses in time attendance and access control (in particular with photo personalization), countless other applications have been found for plastic cards, e.g. for personalized customer and members' cards, for sports ticketing and in local public transport systems for

1610-700: A conventional resident don , and inattentive to his teaching responsibilities, he wrote three topical books during this period of his life. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1832. Babbage was out of sympathy with colleagues: George Biddell Airy , his predecessor as Lucasian Professor of Mathematics at Trinity College, Cambridge, thought an issue should be made of his lack of interest in lecturing. Babbage planned to lecture in 1831 on political economy . Babbage's reforming direction looked to see university education more inclusive, universities doing more for research,

1725-449: A database (or spreadsheet) and can be installed on a single computer or network. Alongside the basic function of printing cards, card printers can also read and encode magnetic stripes as well as contact and contact free RFID chip cards ( smart cards ). Thus card printers enable the encoding of plastic cards both visually and logically. Plastic cards can also be laminated after printing. Plastic cards are laminated after printing to achieve

1840-561: A dedicated data cable such as the USB , through a short-range radio like Bluetooth , a local area network using cables (such as the Ethernet ) or radio (such as WiFi ), or on a standalone basis without a computer, using a memory card or other portable data storage device. Charles Babbage This is an accepted version of this page Charles Babbage KH FRS ( / ˈ b æ b ɪ dʒ / ; 26 December 1791 – 18 October 1871)

1955-466: A detailed description of many of the technologies used. Several different computer printers were simply computer-controllable versions of existing electric typewriters. The Friden Flexowriter and IBM Selectric-based printers were the most-common examples. The Flexowriter printed with a conventional typebar mechanism while the Selectric used IBM's well-known "golf ball" printing mechanism. In either case,

2070-466: A divine legislator. In this book, Babbage dealt with relating interpretations between science and religion; on the one hand, he insisted that "there exists no fatal collision between the words of Scripture and the facts of nature;" on the other hand, he wrote that the Book of Genesis was not meant to be read literally in relation to scientific terms. Against those who said these were in conflict, he wrote "that

2185-494: A document in one pass. Commercial-grade models can print on six-part forms, while less powerful, low-cost ones may print up to three-part forms. Usually, this feature is used in conjunction with continuous, prearranged perforated paper and carbon supplies for use with a tractor feeder, rather than with single sheets of paper, for example, when printing out commercial invoices or receipts. Printer (computing)#Obsolete and special-purpose printing technologies In computing ,

2300-499: A fast and lifelong friendship with Herschel and with Babbage, who was then quite young. I would ask any fair-minded mathematician to read Babbage's Ninth Bridgewater Treatise and compare it with the works of his contemporaries in England; and then ask himself whence came the peculiar conception of the nature of miracle which underlies Babbage's ideas of Singular Points on Curves (Chap, viii) – from European Theology or Hindu Metaphysic? Oh! how

2415-443: A hard copy of a given document. They are generally slow devices ranging from 6 to around 25 pages per minute (ppm), and the cost per page is relatively high. However, this is offset by the on-demand convenience. Some printers can print documents stored on memory cards or from digital cameras and scanners . Networked or shared printers are "designed for high-volume, high-speed printing". They are usually shared by many users on

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2530-635: A later visit to Piedmont . In April 1828 he was in Rome , and relying on Herschel to manage the difference engine project, when he heard that he had become a professor at Cambridge, a position he had three times failed to obtain (in 1820, 1823 and 1826). Babbage was instrumental in founding the Royal Astronomical Society in 1820, initially known as the Astronomical Society of London. Its original aims were to reduce astronomical calculations to

2645-527: A layer of ink on paper. A card printer is an electronic desktop printer with single card feeders which print and personalize plastic cards . In this respect they differ from, for example, label printers which have a continuous supply feed. Card dimensions are usually 85.60 × 53.98 mm, standardized under ISO/IEC 7810 as ID-1. This format is also used in EC-cards , telephone cards , credit cards , driver's licenses and health insurance cards . This

2760-498: A meeting hosted by John Chapman to campaign against the Booksellers Association, still a cartel . It has been written that "what Arthur Young was to agriculture, Charles Babbage was to the factory visit and machinery". Babbage's theories are said to have influenced the layout of the 1851 Great Exhibition , and his views had a strong effect on his contemporary George Julius Poulett Scrope . Karl Marx argued that

2875-401: A more standard form, and to circulate data. These directions were closely connected with Babbage's ideas on computation, and in 1824 he won its Gold Medal , cited "for his invention of an engine for calculating mathematical and astronomical tables ". Babbage's motivation to overcome errors in tables by mechanisation had been a commonplace since Dionysius Lardner wrote about it in 1834 in

2990-403: A multiple-use sheet of carbon paper supplied, so that the user can keep an exact copy of each receipt issued, although even here carbonless copy paper is often used to the same effect. It is still common for a business letter to include, at the end, a list of names preceded by the abbreviation "CC", indicating that the named persons are to receive copies of the letter, even though carbon paper

3105-477: A nephew wrote to say that Babbage was born one year earlier, in 1791. The parish register of St. Mary's , Newington , London, shows that Babbage was baptised on 6 January 1792, supporting a birth year of 1791. Babbage was one of four children of Benjamin Babbage and Betsy Plumleigh Teape. His father was a banking partner of William Praed in founding Praed's & Co. of Fleet Street , London, in 1801. In 1808,

3220-537: A period during the early home computer era when a range of printers were manufactured under many brands such as the Commodore VIC-1525 using the Seikosha Uni-Hammer system. This used a single solenoid with an oblique striker that would be actuated 7 times for each column of 7 vertical pixels while the head was moving at a constant speed. The angle of the striker would align the dots vertically even though

3335-558: A principle openly borrowed from the Jacquard loom . Babbage had a broad range of interests in addition to his work on computers covered in his 1832 book Economy of Manufactures and Machinery . He was an important figure in the social scene in London, and is credited with importing the "scientific soirée" from France with his well-attended Saturday evening soirées . His varied work in other fields has led him to be described as "pre-eminent" among

3450-593: A printer driver, but which is not connected with a physical computer printer. A virtual printer can be used to create a file which is an image of the data which would be printed, for archival purposes or as input to another program, for example to create a PDF or to transmit to another system or user. A barcode printer is a computer peripheral for printing barcode labels or tags that can be attached to, or printed directly on, physical objects. Barcode printers are commonly used to label cartons before shipment, or to label retail items with UPCs or EANs . A 3D printer

3565-468: A printer on their network that is capable of printing identification cards. If a business already owns an ID card printer, then a desktop-based badge maker is probably suitable for their needs. Typically, large organizations who have high employee turnover will have their own printer. A desktop-based badge maker is also required if a company needs their IDs make instantly. An example of this is the private construction site that has restricted access. However, if

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3680-402: A single horizontal series of pixels across the page), referring to the configuration of the print head. In the 1970s and '80s, dot matrix printers were one of the more common types of printers used for general use, such as for home and small office use. Such printers normally had either 9 or 24 pins on the print head (early 7 pin printers also existed, which did not print descenders ). There was

3795-501: A single typeface at one time, although bolding and underlining of text could be done by "overstriking", that is, printing two or more impressions either in the same character position or slightly offset. Impact printers varieties include typewriter-derived printers, teletypewriter-derived printers, daisywheel printers, dot matrix printers, and line printers. Dot-matrix printers remain in common use in businesses where multi-part forms are printed. An overview of impact printing contains

3910-402: A translation from French of the lectures of Sylvestre Lacroix , which was then the state-of-the-art calculus textbook. Reference to Lagrange in calculus terms marks out the application of what are now called formal power series . British mathematicians had used them from about 1730 to 1760. As re-introduced, they were not simply applied as notations in differential calculus . They opened up

4025-855: A uniform rate that was put into effect with the introduction of the Uniform Fourpenny Post supplanted by the Uniform Penny Post in 1839 and 1840. Colby was another of the founding group of the Society. He was also in charge of the Survey of Ireland . Herschel and Babbage were present at a celebrated operation of that survey, the remeasuring of the Lough Foyle baseline. The Analytical Society had initially been no more than an undergraduate provocation. During this period it had some more substantial achievements. In 1816, Babbage, Herschel and Peacock published

4140-403: Is Zink (a portmanteau of "zero ink"). The following technologies are either obsolete, or limited to special applications though most were, at one time, in widespread use. Impact printers rely on a forcible impact to transfer ink to the media. The impact printer uses a print head that either hits the surface of the ink ribbon, pressing the ink ribbon against the paper (similar to the action of

4255-531: Is a Divine energy which overrides what we familiarly call the laws of nature." He alluded to the limits of human experience, expressing: "all that we see in a miracle is an effect which is new to our observation, and whose cause is concealed. The cause may be beyond the sphere of our observation, and would be thus beyond the familiar sphere of nature; but this does not make the event a violation of any law of nature. The limits of man's observation lie within very narrow boundaries, and it would be arrogance to suppose that

4370-406: Is a device for making a three-dimensional object from a 3D model or other electronic data source through additive processes in which successive layers of material (including plastics, metals, food, cement, wood, and other materials) are laid down under computer control. It is called a printer by analogy with an inkjet printer which produces a two-dimensional document by a similar process of depositing

4485-521: Is an inherent assumption in Frederick Winslow Taylor 's scientific management . Mary Everest Boole claimed that there was profound influence – via her uncle George Everest – of Indian thought in general and Indian logic , in particular, on Babbage and on her husband George Boole , as well as on Augustus De Morgan : Think what must have been the effect of the intense Hinduizing of three such men as Babbage, De Morgan, and George Boole on

4600-561: Is commonly known as the bank card format. Card printers are controlled by corresponding printer drivers or by means of a specific programming language. Generally card printers are designed with laminating, striping, and punching functions, and use desktop or web-based software. The hardware features of a card printer differentiate a card printer from the more traditional printers, as ID cards are usually made of PVC plastic and require laminating and punching. Different card printers can accept different card thickness and dimensions. The principle

4715-480: Is interpreted as "courtesy copy". The term "carbon copy" can denote anything that is a near duplicate of an original ("...and you want to turn him into a carbon copy of every fourth-rate conformist in this frightened land!" Robert Heinlein , Stranger in a Strange Land ). Carbon copy can be used as a transitive verb with the meaning described under e-mail below related to the CC field of an e-mail message. That is, to send

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4830-606: Is less than ±0.1%. (All laser printers have an accuracy of ±1%.) Worldwide, most survey offices used this printer before color inkjet plotters become popular. Liquid ink electrostatic printers were mostly available in 36 to 54 inches (910 to 1,370 mm) width and also 6 color printing. These were also used to print large billboards. It was first introduced by Versatec, which was later bought by Xerox . 3M also used to make these printers. Pen-based plotters were an alternate printing technology once common in engineering and architectural firms. Pen-based plotters rely on contact with

4945-503: Is no longer used to make the copies. An alternative etymology is that "c:" was used for copy and "cc:" indicates the plural, just as "p." means page and "pp." means pages. This alternative etymology explains the frequent usage of "c:" when only one recipient is listed, while "cc:" is used for two or more recipients of the copies. This etymology can also explain why, even originally, "cc:" was used to list recipients who received typed copies and not necessarily carbon copies. Sometimes this "cc"

5060-474: Is often forgotten is resistance to alteration: liquid ink , such as from an inkjet head or fabric ribbon, becomes absorbed by the paper fibers, so documents printed with liquid ink are more difficult to alter than documents printed with toner or solid inks, which do not penetrate below the paper surface. Cheques can be printed with liquid ink or on special cheque paper with toner anchorage so that alterations may be detected. The machine-readable lower portion of

5175-493: Is that skilled workers typically spend parts of their time performing tasks that are below their skill level. If the labour process can be divided among several workers, labour costs may be cut by assigning only high-skill tasks to high-cost workers, restricting other tasks to lower-paid workers. He also pointed out that training or apprenticeship can be taken as fixed costs; but that returns to scale are available by his approach of standardisation of tasks, therefore again favouring

5290-560: Is the original and each of the additional sheets is called a carbon copy . While carbon paper was invented by Pellegrino Turri in 1801, it was not widely used for copying until typewriters became common. Carbon copies were in wide use between the 1870s and 1980s, largely for administrative tasks. The use of carbon copies declined with the advent of photocopying and electronic document creation and distribution (word processing). Carbon copies are still sometimes used in special applications: for example, in manual receipt books which have

5405-506: Is the same for practically all card printers: the plastic card is passed through a thermal print head at the same time as a color ribbon. The color from the ribbon is transferred onto the card through the heat given out from the print head. The standard performance for card printing is 300 dpi (300 dots per inch, equivalent to 11.8 dots per mm). There are different printing processes, which vary in their detail: Broadly speaking there are three main types of card printers, differing mainly by

5520-464: The Edinburgh Review (under Babbage's guidance). The context of these developments is still debated. Babbage's own account of the origin of the difference engine begins with the Astronomical Society's wish to improve The Nautical Almanac . Babbage and Herschel were asked to oversee a trial project, to recalculate some part of those tables. With the results to hand, discrepancies were found. This

5635-682: The Royal Guelphic Order , however they were not subsequently made knights bachelor to entitle them to the prefix Sir , which often came with appointments to that foreign order (though Herschel was later created a baronet ). Babbage now emerged as a polemicist . One of his biographers notes that all his books contain a "campaigning element". His Reflections on the Decline of Science and some of its Causes (1830) stands out, however, for its sharp attacks. It aimed to improve British science, and more particularly to oust Davies Gilbert as President of

5750-677: The Statistical Society followed. Babbage was its public face, backed by Richard Jones and Robert Malthus . Babbage published On the Economy of Machinery and Manufactures (1832), on the organisation of industrial production . It was an influential early work of operational research . John Rennie the Younger in addressing the Institution of Civil Engineers on manufacturing in 1846 mentioned mostly surveys in encyclopaedias, and Babbage's book

5865-607: The To field is for principal recipients of the message, the Cc field indicates secondary recipients whose names are visible to one another and to the principal, and the Bcc ( blind carbon copy ) field contains the names of tertiary recipients whose names are invisible to each other and to the primary and secondary recipients. Impact printers, such as dot matrix and daisy wheel impact printers , are also able to use carbon paper to produce several copies of

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5980-469: The University of Edinburgh , with the recommendation of Pierre Simon Laplace ; the post went to William Wallace . With Herschel, Babbage worked on the electrodynamics of Arago's rotations , publishing in 1825. Their explanations were only transitional, being picked up and broadened by Michael Faraday . The phenomena are now part of the theory of eddy currents , and Babbage and Herschel missed some of

6095-482: The exponential map ). But via Herschel he was influenced by Arbogast's ideas in the matter of iteration , i.e. composing a function with itself, possibly many times. Writing in a major paper on functional equations in the Philosophical Transactions (1815/6), Babbage said his starting point was work of Gaspard Monge . From 1828 to 1839, Babbage was Lucasian Professor of Mathematics at Cambridge. Not

6210-444: The factory system . His view of human capital was restricted to minimising the time period for recovery of training costs. Another aspect of the work was its detailed breakdown of the cost structure of book publishing. Babbage took the unpopular line, from the publishers' perspective, of exposing the trade's profitability. He went as far as to name the organisers of the trade's restrictive practices. Twenty years later he attended

6325-401: The 1990s and into the 2000s has largely displaced the need for printing as a means of moving documents, and a wide variety of reliable storage systems means that a "physical backup" is of little benefit today. Starting around 2010, 3D printing became an area of intense interest, allowing the creation of physical objects with the same sort of effort as an early laser printer required to produce

6440-575: The 19th century, the success of the finished engine indicated that Babbage's machine would have worked. Babbage's birthplace is disputed, but according to the Oxford Dictionary of National Biography he was most likely born at 44 Crosby Row, Walworth Road , London, England. A blue plaque on the junction of Larcom Street and Walworth Road commemorates the event. His date of birth was given in his obituary in The Times as 26 December 1792; but then

6555-417: The 19th century; however, his mechanical printer design was not built until 2000. The first patented printing mechanism for applying a marking medium to a recording medium or more particularly an electrostatic inking apparatus and a method for electrostatically depositing ink on controlled areas of a receiving medium, was in 1962 by C. R. Winston, Teletype Corporation, using continuous inkjet printing. The ink

6670-819: The Almighty which afterwards so much disgusted me in my youthful years. Rejecting the Athanasian Creed as a "direct contradiction in terms", in his youth he looked to Samuel Clarke 's works on religion, of which Being and Attributes of God (1704) exerted a particularly strong influence on him. Later in life, Babbage concluded that "the true value of the Christian religion rested, not on speculative [theology] ... but ... upon those doctrines of kindness and benevolence which that religion claims and enforces, not merely in favour of man himself but of every creature susceptible of pain or of happiness." In his autobiography Passages from

6785-671: The Babbage family moved into the old Rowdens house in East Teignmouth . Around the age of eight, Babbage was sent to a country school in Alphington near Exeter to recover from a life-threatening fever. For a short time, he attended King Edward VI Grammar School in Totnes , South Devon, but his health forced him back to private tutors for a time. Babbage then joined the 30-student Holmwood Academy , in Baker Street, Enfield , Middlesex , under

6900-637: The Creator ever open to our examination, we possess a firm basis on which to raise the superstructure of an enlightened creed. The more man inquires into the laws which regulate the material universe, the more he is convinced that all its varied forms arise from the action of a few simple principles ... The works of the Creator, ever present to our senses, give a living and perpetual testimony of his power and goodness far surpassing any evidence transmitted through human testimony. The testimony of man becomes fainter at every stage of transmission, whilst each new inquiry into

7015-556: The English clergy of that day hated Babbage's book! Babbage was raised in the Protestant form of the Christian faith, his family having inculcated in him an orthodox form of worship. He explained: My excellent mother taught me the usual forms of my daily and nightly prayer; and neither in my father nor my mother was there any mixture of bigotry and intolerance on the one hand, nor on the other of that unbecoming and familiar mode of addressing

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7130-451: The Life of a Philosopher (1864), Babbage wrote a whole chapter on the topic of religion, where he identified three sources of divine knowledge: He stated, on the basis of the design argument , that studying the works of nature had been the more appealing evidence, and the one which led him to actively profess the existence of God . Advocating for natural theology, he wrote: In the works of

7245-539: The Reverend Stephen Freeman. The academy had a library that prompted Babbage's love of mathematics. He studied with two more private tutors after leaving the academy. The first was a clergyman near Cambridge ; through him Babbage encountered Charles Simeon and his evangelical followers, but the tuition was not what he needed. He was brought home, to study at the Totnes school: this was at age 16 or 17. The second

7360-591: The Royal Society, which Babbage wished to reform. It was written out of pique, when Babbage hoped to become the junior secretary of the Royal Society, as Herschel was the senior, but failed because of his antagonism to Humphry Davy . Michael Faraday had a reply written, by Gerrit Moll , as On the Alleged Decline of Science in England (1831). On the front of the Royal Society Babbage had no impact, with

7475-515: The Whitmore sisters. He made a home in Marylebone in London and established a large family. On his father's death in 1827, Babbage inherited a large estate (value around £100,000, equivalent to £10.9 million or $ 15 million today), making him independently wealthy. After his wife's death in the same year he spent time travelling. In Italy he met Leopold II, Grand Duke of Tuscany , foreshadowing

7590-452: The X- and Y-axes, by a mechanism, and the selected letter form was struck by a hammer. Others used a type cylinder in a similar way as the Selectric typewriters used their type ball. In either case, the letter form then struck a ribbon to print the letterform. Most teleprinters operated at ten characters per second although a few achieved 15 CPS. Daisy wheel printers operate in much the same fashion as

7705-463: The barb that both Babbage and Brewster had received public money. In the debate of the period on statistics ( qua data collection) and what is now statistical inference , the BAAS in its Statistical Section (which owed something also to Whewell ) opted for data collection. This Section was the sixth, established in 1833 with Babbage as chairman and John Elliot Drinkwater as secretary. The foundation of

7820-664: The bland election of the Duke of Sussex to succeed Gilbert the same year. As a broad manifesto, on the other hand, his Decline led promptly to the formation in 1831 of the British Association for the Advancement of Science (BAAS). The Mechanics' Magazine in 1831 identified as Declinarians the followers of Babbage. In an unsympathetic tone it pointed out David Brewster writing in the Quarterly Review as another leader; with

7935-899: The clues to unification of electromagnetic theory , staying close to Ampère's force law . Babbage purchased the actuarial tables of George Barrett , who died in 1821 leaving unpublished work, and surveyed the field in 1826 in Comparative View of the Various Institutions for the Assurance of Lives . This interest followed a project to set up an insurance company, prompted by Francis Baily and mooted in 1824, but not carried out. Babbage did calculate actuarial tables for that scheme, using Equitable Society mortality data from 1762 onwards. During this whole period, Babbage depended awkwardly on his father's support, given his father's attitude to his early marriage, of 1814: he and Edward Ryan wedded

8050-420: The concept of a trade . John Ruskin went further, to oppose completely what manufacturing in Babbage's sense stood for. Babbage also affected the economic thinking of John Stuart Mill . George Holyoake saw Babbage's detailed discussion of profit sharing as substantive, in the tradition of Robert Owen and Charles Fourier , if requiring the attentions of a benevolent captain of industry , and ignored at

8165-507: The contradiction they have imagined can have no real existence, and that whilst the testimony of Moses remains unimpeached, we may also be permitted to confide in the testimony of our senses." The Ninth Bridgewater Treatise was quoted extensively in Vestiges of the Natural History of Creation . The parallel with Babbage's computing machines is made explicit, as allowing plausibility to

8280-410: The development of new systems specifically for computer use. In the 1980s there were daisy wheel systems similar to typewriters, line printers that produced similar output but at much higher speed, and dot-matrix systems that could mix text and graphics but produced relatively low-quality output. The plotter was used for those requiring high-quality line art like blueprints . The introduction of

8395-401: The end of the twentieth century. Line printers print an entire line of text at a time. Four principal designs exist. In each case, to print a line, precisely timed hammers strike against the back of the paper at the exact moment that the correct character to be printed is passing in front of the paper. The paper presses forward against a ribbon which then presses against the character form and

8510-460: The fields of functional equations (including the difference equations fundamental to the difference engine) and operator ( D-module ) methods for differential equations . The analogy of difference and differential equations was notationally changing Δ to D, as a "finite" difference becomes "infinitesimal". These symbolic directions became popular, as operational calculus , and pushed to the point of diminishing returns. The Cauchy concept of limit

8625-577: The first part of the book. The second part considered the "domestic and political economy" of manufactures. The book sold well, and quickly went to a fourth edition (1836). Babbage represented his work as largely a result of actual observations in factories, British and abroad. It was not, in its first edition, intended to address deeper questions of political economy; the second (late 1832) did, with three further chapters including one on piece rate . The book also contained ideas on rational design in factories, and profit sharing . In Economy of Machinery

8740-437: The head had moved one dot spacing in the time. The vertical dot position was controlled by a synchronized longitudinally ribbed platen behind the paper that rotated rapidly with a rib moving vertically seven dot spacings in the time it took to print one pixel column. 24-pin print heads were able to print at a higher quality and started to offer additional type styles and were marketed as Near Letter Quality by some vendors. Once

8855-468: The impression of the character form is printed onto the paper. Each system could have slight timing issues, which could cause minor misalignment of the resulting printed characters. For drum or typebar printers, this appeared as vertical misalignment, with characters being printed slightly above or below the rest of the line. In chain or bar printers, the misalignment was horizontal, with printed characters being crowded closer together or farther apart. This

8970-405: The letter form then struck a ribbon which was pressed against the paper, printing one character at a time. The maximum speed of the Selectric printer (the faster of the two) was 15.5 characters per second. The common teleprinter could easily be interfaced with the computer and became very popular except for those computers manufactured by IBM . Some models used a "typebox" that was positioned, in

9085-615: The liquid ink on a rotating, oil coated drum. The paper then passes over the print drum, at which time the image is immediately transferred, or transfixed, to the page. Solid ink printers are most commonly used as color office printers and are excellent at printing on transparencies and other non-porous media. Solid ink is also called phase-change or hot-melt ink and was first used by Data Products and Howtek, Inc., in 1984. Solid ink printers can produce excellent results with text and images. Some solid ink printers have evolved to print 3D models, for example, Visual Impact Corporation of Windham, NH

9200-591: The low-cost laser printer in 1984, with the first HP LaserJet , and the addition of PostScript in next year's Apple LaserWriter set off a revolution in printing known as desktop publishing . Laser printers using PostScript mixed text and graphics, like dot-matrix printers, but at quality levels formerly available only from commercial typesetting systems. By 1990, most simple printing tasks like fliers and brochures were now created on personal computers and then laser printed; expensive offset printing systems were being dumped as scrap. The HP Deskjet of 1988 offered

9315-494: The many polymaths of his century. Babbage, who died before the complete successful engineering of many of his designs, including his Difference Engine and Analytical Engine, remained a prominent figure in the ideating of computing. Parts of his incomplete mechanisms are on display in the Science Museum in London. In 1991, a functioning difference engine was constructed from the original plans. Built to tolerances achievable in

9430-585: The mathematical atmosphere of 1830–65. What share had it in generating the Vector Analysis and the mathematics by which investigations in physical science are now conducted? In 1837, responding to the series of eight Bridgewater Treatises , Babbage published his Ninth Bridgewater Treatise , under the title On the Power, Wisdom and Goodness of God, as manifested in the Creation . In this work Babbage weighed in on

9545-442: The message to additional recipients beyond the primary recipient. It is common practice to abbreviate the verb form, and many forms are used, including cc and cc: . Past tense forms in use are CCed , cc'd , cc'ed , cc-ed and cc:'d . Present participle or imperfect forms in use include cc'ing . Merriam-Webster uses cc , cc'd and cc'ing , respectively. In common usage, an email message has three fields for addressees:

9660-400: The method used to print onto the card. They are: Different ID Card Printers use different encoding techniques to facilitate disparate business environments and to support security initiatives. Known encoding techniques are: There are basically two categories of card printer software: desktop-based, and web-based (online). The biggest difference between the two is whether or not a customer has

9775-463: The most common type of computer printer used by consumers. Solid ink printers, also known as phase-change ink or hot-melt ink printers, are a type of thermal transfer printer , graphics sheet printer or 3D printer . They use solid sticks, crayons, pearls or granular ink materials. Common inks are CMYK -colored ink, similar in consistency to candle wax, which are melted and fed into a piezo crystal operated print-head. A Thermal transfer printhead jets

9890-464: The other hand, the mechanical components of line printers operate with tight tolerances and require regular preventive maintenance (PM) to produce a top quality print. They are virtually never used with personal computers and have now been replaced by high-speed laser printers . The legacy of line printers lives on in many operating systems , which use the abbreviations "lp", "lpr", or "LPT" to refer to printers. Liquid ink electrostatic printers use

10005-639: The paper (but not impact, per se) and special purpose pens that are mechanically run over the paper to create text and images. Since the pens output continuous lines, they were able to produce technical drawings of higher resolution than was achievable with dot-matrix technology. Some plotters used roll-fed paper, and therefore had a minimal restriction on the size of the output in one dimension. These plotters were capable of producing quite sizable drawings. A number of other sorts of printers are important for historical reasons, or for special purpose uses. Printers can be connected to computers in many ways: directly by

10120-399: The pressure of the print head to be applied to a stack of two or more forms to print multi-part documents such as sales invoices and credit card receipts using continuous stationery with carbonless copy paper . It also has security advantages as ink impressed into a paper matrix by force is harder to erase invisibly. Dot-matrix printers were being superseded even as receipt printers after

10235-506: The price of inkjet printers dropped to the point where they were competitive with dot matrix printers, dot matrix printers began to fall out of favour for general use. Some dot matrix printers, such as the NEC P6300, can be upgraded to print in color. This is achieved through the use of a four-color ribbon mounted on a mechanism (provided in an upgrade kit that replaces the standard black ribbon mechanism after installation) that raises and lowers

10350-462: The printing business to Xerox in 2001. A dye-sublimation printer (or dye-sub printer) is a printer that employs a printing process that uses heat to transfer dye to a medium such as a plastic card , paper, or canvas . The process is usually to lay one color at a time using a ribbon that has color panels. Dye-sub printers are intended primarily for high-quality color applications, including color photography; and are less well-suited for text. While once

10465-463: The production of season tickets, for the production of school and college identity cards as well as for the production of national ID cards. The choice of print technology has a great effect on the cost of the printer and cost of operation, speed, quality and permanence of documents, and noise. Some printer technologies do not work with certain types of physical media, such as carbon paper or transparencies . A second aspect of printer technology that

10580-530: The province of high-end print shops, dye-sublimation printers are now increasingly used as dedicated consumer photo printers. Thermal printers work by selectively heating regions of special heat-sensitive paper. Monochrome thermal printers are used in cash registers, ATMs , gasoline dispensers and some older inexpensive fax machines. Colors can be achieved with special papers and different temperatures and heating rates for different colors; these colored sheets are not required in black-and-white output. One example

10695-526: The ribbons as needed. Color graphics are generally printed in four passes at standard resolution, thus slowing down printing considerably. As a result, color graphics can take up to four times longer to print than standard monochrome graphics, or up to 8-16 times as long at high resolution mode. Dot matrix printers are still commonly used in low-cost, low-quality applications such as cash registers , or in demanding, very high volume applications like invoice printing. Impact printing, unlike laser printing, allows

10810-419: The same advantages as a laser printer in terms of flexibility, but produced somewhat lower-quality output (depending on the paper) from much less-expensive mechanisms. Inkjet systems rapidly displaced dot-matrix and daisy-wheel printers from the market. By the 2000s, high-quality printers of this sort had fallen under the $ 100 price point and became commonplace. The rapid improvement of internet email through

10925-408: The side of uniformitarianism in a current debate. He preferred the conception of creation in which a God-given natural law dominated, removing the need for continuous "contrivance". The book is a work of natural theology , and incorporates extracts from related correspondence of Herschel with Charles Lyell . Babbage put forward the thesis that God had the omnipotence and foresight to create as

11040-415: The source of the productivity of the factory system was exactly the combination of the division of labour with machinery, building on Adam Smith , Babbage and Ure. Where Marx picked up on Babbage and disagreed with Smith was on the motivation for division of labour by the manufacturer: as Babbage did, he wrote that it was for the sake of profitability , rather than productivity, and identified an impact on

11155-432: The theory that transmutation of species could be pre-programmed. Jonar Ganeri, author of Indian Logic , believes Babbage may have been influenced by Indian thought; one possible route would be through Henry Thomas Colebrooke . Mary Everest Boole argues that Babbage was introduced to Indian thought in the 1820s by her uncle George Everest: Some time about 1825, [Everest] came to England for two or three years, and made

11270-447: The time. Charles Babbage's Saturday night soirées , held from 1828 into the 1840s, were important gathering places for prominent scientists, authors and aristocracy. Babbage is credited with importing the "scientific soirée" from France with his well-attended Saturday evening soirées . Works by Babbage and Ure were published in French translation in 1830; On the Economy of Machinery

11385-602: The university. Babbage, John Herschel , George Peacock , and several other friends formed the Analytical Society in 1812; they were also close to Edward Ryan . As a student, Babbage was also a member of other societies such as The Ghost Club , concerned with investigating supernatural phenomena, and the Extractors Club, dedicated to liberating its members from the madhouse, should any be committed to one. In 1812, Babbage transferred to Peterhouse, Cambridge . He

11500-410: The wax tends to repel inks from pens , and are difficult to feed through automatic document feeders , but these traits have been significantly reduced in later models. This type of thermal transfer printer is only available from one manufacturer, Xerox , manufactured as part of their Xerox Phaser office printer line. Previously, solid ink printers were manufactured by Tektronix , but Tektronix sold

11615-433: The works of the Almighty gives to us more exalted views of his wisdom, his goodness, and his power. Like Samuel Vince , Babbage also wrote a defence of the belief in divine miracles . Against objections previously posed by David Hume , Babbage advocated for the belief of divine agency, stating "we must not measure the credibility or incredibility of an event by the narrow sphere of our own experience, nor forget that there

11730-629: Was a red stamp-pad ink manufactured by Phillips Process Company of Rochester, NY under the name Clear Print. This patent (US3060429) led to the Teletype Inktronic Printer product delivered to customers in late 1966. The first compact, lightweight digital printer was the EP-101 , invented by Japanese company Epson and released in 1968, according to Epson. The first commercial printers generally used mechanisms from electric typewriters and Teletype machines. The demand for higher speed led to

11845-593: Was an Oxford tutor, under whom Babbage reached a level in Classics sufficient to be accepted by the University of Cambridge. Babbage arrived at Trinity College, Cambridge , in October 1810. He was already self-taught in some parts of contemporary mathematics; he had read Robert Woodhouse , Joseph Louis Lagrange , and Maria Gaetana Agnesi . As a result, he was disappointed in the standard mathematical instruction available at

11960-544: Was an English polymath . A mathematician, philosopher, inventor and mechanical engineer, Babbage originated the concept of a digital programmable computer. Babbage is considered by some to be " father of the computer ". He is credited with inventing the first mechanical computer , the Difference Engine , that eventually led to more complex electronic designs, though all the essential ideas of modern computers are to be found in his Analytical Engine , programmed using

12075-603: Was as clear and crisp as a typewriter. The fastest letter-quality printers printed at 30 characters per second. The term dot matrix printer is used for impact printers that use a matrix of small pins to transfer ink to the page. The advantage of dot matrix over other impact printers is that they can produce graphical images in addition to text; however the text is generally of poorer quality than impact printers that use letterforms ( type ). Dot-matrix printers can be broadly divided into two major classes: Dot matrix printers can either be character -based or line-based (that is,

12190-435: Was described what is now called the "Babbage principle". It pointed out commercial advantages available with more careful division of labour . As Babbage himself noted, it had already appeared in the work of Melchiorre Gioia in 1815. The term was introduced in 1974 by Harry Braverman . Related formulations are the "principle of multiples" of Philip Sargant Florence , and the "balance of processes". What Babbage remarked

12305-560: Was elected a Fellow of the Royal Society in 1816. After graduation, on the other hand, he applied for positions unsuccessfully, and had little in the way of a career. In 1816 he was a candidate for a teaching job at Haileybury College ; he had recommendations from James Ivory and John Playfair , but lost out to Henry Walter . In 1819, Babbage and Herschel visited Paris and the Society of Arcueil , meeting leading French mathematicians and physicists. That year Babbage applied to be professor at

12420-625: Was first an article in the Encyclopædia Metropolitana , the form in which Rennie noted it, in the company of related works by John Farey Jr. , Peter Barlow and Andrew Ure . From An essay on the general principles which regulate the application of machinery to manufactures and the mechanical arts (1827), which became the Encyclopædia Metropolitana article of 1829, Babbage developed the schematic classification of machines that, combined with discussion of factories, made up

12535-526: Was in 1821 or 1822, and was the occasion on which Babbage formulated his idea for mechanical computation. The issue of the Nautical Almanac is now described as a legacy of a polarisation in British science caused by attitudes to Sir Joseph Banks , who had died in 1820. Babbage studied the requirements to establish a modern postal system , with his friend Thomas Frederick Colby , concluding there should be

12650-437: Was kept at bay. Woodhouse had already founded this second "British Lagrangian School" with its treatment of Taylor series as formal. In this context function composition is complicated to express, because the chain rule is not simply applied to second and higher derivatives. This matter was known to Woodhouse by 1803, who took from Louis François Antoine Arbogast what is now called Faà di Bruno's formula . In essence it

12765-405: Was known to Abraham De Moivre (1697). Herschel found the method impressive, Babbage knew of it, and it was later noted by Ada Lovelace as compatible with the analytical engine. In the period to 1820 Babbage worked intensively on functional equations in general, and resisted both conventional finite differences and Arbogast's approach (in which Δ and D were related by the simple additive case of

12880-427: Was much less noticeable to human vision than vertical misalignment, where characters seemed to bounce up and down in the line, so they were considered as higher quality print. Line printers are the fastest of all impact printers and are used for bulk printing in large computer centres. A line printer can print at 1100 lines per minute or faster, frequently printing pages more rapidly than many current laser printers. On

12995-424: Was started by retired Howtek employee, Richard Helinski whose 3D patents US4721635 and then US5136515 was licensed to Sanders Prototype, Inc., later named Solidscape, Inc. Acquisition and operating costs are similar to laser printers . Drawbacks of the technology include high energy consumption and long warm-up times from a cold state. Also, some users complain that the resulting prints are difficult to write on, as

13110-492: Was the top mathematician there, but did not graduate with honours. He instead received a degree without examination in 1814. He had defended a thesis that was considered blasphemous in the preliminary public disputation, but it is not known whether this fact is related to his not sitting the examination. Considering his reputation, Babbage quickly made progress. He lectured to the Royal Institution on astronomy in 1815, and

13225-423: Was translated in 1833 into French by Édouard Biot , and into German the same year by Gottfried Friedenberg. The French engineer and writer on industrial organisation Léon Lalanne was influenced by Babbage, but also by the economist Claude Lucien Bergery , in reducing the issues to "technology". William Jevons connected Babbage's "economy of labour" with his own labour experiments of 1870. The Babbage principle

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