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Ebonite

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Ebonite is a brand name for a material generically known as hard rubber or vulcanite , obtained via vulcanizing natural rubber for prolonged periods. Ebonite may contain from 25% to 80% sulfur and linseed oil . Its name comes from its intended use as an artificial substitute for ebony wood. The material has also been called vulcanite , although that name formally refers to the mineral vulcanite .

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65-408: Charles Goodyear 's brother, Nelson Goodyear, experimented with the chemistry of ebonite composites. In 1851, he used zinc oxide as a filler. Hugh Silver was responsible for giving it its name. The sulfur percentage and the applied temperatures and duration of vulcanizing are the main variables that determine the technical properties of the hard rubber polysulfide elastomer . The occurring reaction

130-515: A book or referenced in a reading list), YouTube , Udemy , Udacity and Khan Academy in particular, have developed as learning centers for many people to actively and freely learn together. Organizations like The Alliance for Self-Directed Education (ASDE) have been formed to publicize and provide guidance for self-directed education. Entrepreneurs like Henry Ford, Steve Jobs, and Bill Gates are considered influential self-teachers. The first philosophical claim supporting an autodidactic program to

195-561: A learning space , where one uses critical thinking to develop study skills within the broader learning environment until they've reached an academic comfort zone . The term has its roots in the Ancient Greek words αὐτός ( autós , lit.   ' self ' ) and διδακτικός ( didaktikos , lit.   ' teaching ' ). The related term didacticism defines an artistic philosophy of education . Various terms are used to describe self-education. One such

260-539: A political state starts to implement restrictions on the profession, there are issues related to the rights of established self-taught architects. In most countries the legislation includes a grandfather clause , authorising established self-taught architects to continue practicing. In the UK, the legislation allowed self-trained architects with two years of experience to register. In France, it allowed self-trained architects with five years of experience to register. In Belgium,

325-457: A subject -of-study's aboutness through self-study. This educative praxis (process) may involve or complement formal education . Formal education itself may have a hidden curriculum that requires self-study for the uninitiated. Generally, autodidacts are individuals who choose the subject they will study, their studying material, and the studying rhythm and time. Autodidacts may or may not have formal education, and their study may be either

390-518: A certain amount of magnesia which produced a white compound that appeared to take away the stickiness. He thought he had discovered the secret, and through the kindness of friends was able to improve his invention in New Haven. The first thing that he made was shoes, and he used his own house for grinding, calendering and vulcanizing, with the help of his wife and children. His compound at this time consisted of India rubber, lampblack , and magnesia,

455-577: A clause, and many established and competent practitioners were stripped of their professional rights. In the Republic of Ireland, a group named " Architects' Alliance of Ireland " is defending the interests of long-established self-trained architects who were deprived of their rights to practice as per Part 3 of the Irish Building Control Act 2007. Theoretical research such as Architecture of Change, Sustainability and Humanity in

520-581: A complement or an alternative to formal education. Many notable contributions have been made by autodidacts. The self-learning curriculum is infinite. One may seek out alternative pathways in education and use these to gain competency ; self-study may meet some prerequisite-curricula criteria for experiential education or apprenticeship . Self-education techniques used in self-study can include reading educational textbooks , watching educational videos and listening to educational audio recordings , or by visiting infoshops . One uses some space as

585-572: A drop of weak acid , falling on the cloth, neutralized the alkali and immediately caused the rubber to become soft again. This proved to him that his process was not a successful one. He therefore continued experimenting, and after preparing his mixtures in his attic in New York, would walk three miles to a mill in Greenwich Village to try various experiments. In the line of these, he discovered that rubber dipped in nitric acid formed

650-418: A factory and began to make clothing, life preservers, rubber shoes, and a great variety of rubber goods. They also had a large factory with special machinery, built at Staten Island , where he moved his family and again had a home of his own. Just about this time, when everything looked bright, the panic of 1837 came and swept away the entire fortune of his associate and left Goodyear penniless. His next move

715-406: A given area. Furthermore, massive open online courses (MOOCs) make autodidacticism easier and thus more common. A 2016 Stack Overflow poll reported that due to the rise of autodidacticism, 69.1% of software developers appear to be self-taught. Some notable autodidacts can be broadly grouped in the following interdisciplinary areas: Most governments have compulsory education that may deny

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780-491: A given skill or about a given topic, supporting one another by pooling resources, materials, and knowledge. Secular and modern societies have given foundations for new systems of education and new kinds of autodidacts. As Internet access has become more widespread the World Wide Web (explored using search engines such as Google ) in general, and websites such as Misplaced Pages (including parts of it that were included in

845-582: A mystical mediation and communion with God. The hero rises from his initial state of tabula rasa to a mystical or direct experience of God after passing through the necessary natural experiences. The focal point of the story is that human reason, unaided by society and its conventions or by religion, can achieve scientific knowledge, preparing the way to the mystical or highest form of human knowledge. Commonly translated as "The Self-Taught Philosopher" or "The Improvement of Human Reason", Ibn-Tufayl's story Hayy Ibn-Yaqzan inspired debates about autodidacticism in

910-432: A process outside conscious control. To interact with the environment, a framework has been identified to determine the components of any learning system: a reward function, incremental action value functions and action selection methods. Rewards work best in motivating learning when they are specifically chosen on an individual student basis. New knowledge must be incorporated into previously existing information as its value

975-453: A quiet boarding place, he went to New York and, helped by a friendly druggist, continued his experiments in an attic. His next step was to compound the rubber with magnesia and then boil it in quicklime and water. This appeared to solve the problem. At once it was noticed abroad that he had treated India Rubber to lose its stickiness, and he received international acclamation. He seemed on the high road to success, until, one day, he noticed that

1040-622: A range of historical fields from classical Islamic philosophy through Renaissance humanism and the European Enlightenment. In his book Reading Hayy Ibn-Yaqzan: a Cross-Cultural History of Autodidacticism, Avner Ben-Zaken showed how the text traveled from late medieval Andalusia to early modern Europe and demonstrated the intricate ways in which autodidacticism was contested in and adapted to diverse cultural settings. Autodidacticism apparently intertwined with struggles over Sufism in twelfth-century Marrakesh; controversies about

1105-423: A self-directed learning experience. Several studies show these programs function most effectively when the "teacher" or facilitator is a full owner of virtual space to encourage a broad range of experiences to come together in an online format. This allows self-directed learning to encompass both a chosen path of information inquiry, self-regulation methods and reflective discussion among experts as well as novices in

1170-462: A surface cure, and he made many products with this acid cure which were held in high regard, and he even received a letter of commendation from Andrew Jackson . Exposure to harsh chemicals , such as nitric acid and lead oxide , adversely affected his health. Once, he nearly suffocated himself by gas generated in his laboratory. Goodyear survived, but the resulting fever came close to taking his life. Together with an old business partner, he built up

1235-476: A system where working is also learning, where self-education is associated with creativity and productivity within a working environment. While he was primarily interested in naval architecture , William Francis Gibbs learned his profession through his own study of battleships and ocean liners . Through his life he could be seen examining and changing the designs of ships that were already built, that is, until he started his firm Gibbs and Cox . Openness

1300-409: A variety of agricultural supplements. He had siblings Nelson Goodyear, Henry Goodyear, Robert Goodyear, Harriet Goodyear Tomlinson, Amasa Goodyear, Jr. On August 3, 1824, he married Clarissa Beecher, whom he met at his Congregational Church. Two years later the family moved to Philadelphia , and there Charles Goodyear opened a hardware store. This is where he did most of his work. His specialties were

1365-468: Is heutagogy , coined in 2000 by Stewart Hase and Chris Kenyon of Southern Cross University in Australia; others are self-directed learning and self-determined learning . In the heutagogy paradigm, a learner should be at the centre of their own learning. A truly self-determined learning approach also sees the heutagogic learner exploring different approaches to knowledge in order to learn; there

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1430-477: Is an element of experimentation underpinned by a personal curiosity. Andragogy "strive[s] for autonomy and self-direction in learning", while Heutagogy "identif[ies] the potential to learn from novel experiences as a matter of course [...] manage their own learning". Ubuntugogy is a type of cosmopolitanism that has a collectivist ethics of awareness concerning the African diaspora . Autodidacticism

1495-554: Is an elementary school named after him. The Government of France made him a Chevalier de la Légion d'honneur in 1855. The ACS Rubber Division awards a medal named in Goodyear's honor, the Charles Goodyear Medal . The medal honors principal inventors, innovators, and developers whose contributions resulted in a significant change to the nature of the rubber industry. The Goodyear welt , a technique in shoemaking,

1560-436: Is at or near the negative end of the triboelectric series . Hard rubber was used in the cases of automobile batteries for years, thus establishing black as their traditional colour even long after stronger modern plastics like polypropylene were substituted. It was used for decades in hair combs made by Ace, now part of Newell Rubbermaid , although the current models are known to be produced solely with plastics. Ebonite

1625-427: Is basically addition of sulfur at the double bonds, forming intramolecular ring structures, so a large portion of the sulfur is highly cross-linked in the form of intramolecular addition. As a result of having a maximum sulfur content up to 40%, it may be used to resist swelling and minimize dielectric loss. The strongest mechanical properties and greatest heat resistance is obtained with sulfur contents around 35% while

1690-453: Is sometimes a complement of modern formal education. As a complement to formal education, students would be encouraged to do more independent work. The Industrial Revolution created a new situation for self-directed learners. Before the twentieth century, only a small minority of people received an advanced academic education. As stated by Joseph Whitworth in his influential report on industry dated from 1853, literacy rates were higher in

1755-661: Is the largest predictor of self-directed learning out of the Big Five personality traits , though, in a study, personality only explained 10% of the variance in self-directed learning. The role of self-directed learning continues to be investigated in learning approaches, along with other important goals of education, such as content knowledge, epistemic practices and collaboration. As colleges and universities offer distance learning degree programs and secondary schools provide cyber school options for K–12 students, technology provides numerous resources that enable individuals to have

1820-559: Is to be assessed. Ultimately, these scaffolding techniques, as described by Vygotsky (1978) and problem solving methods are a result of dynamic decision making. In his book Deschooling Society , philosopher Ivan Illich strongly criticized 20th-century educational culture and the institutionalization of knowledge and learning - arguing that institutional schooling as such is an irretrievably flawed model of education - advocating instead ad-hoc co-operative networks through which autodidacts could find others interested in teaching themselves

1885-466: Is used as an anticorrosive lining for various (mainly storage) vessels that contain diluted hydrochloric acid . It forms bubbles when storing hydrofluoric acid at temperatures above room temperature, or for prolonged durations. Charles Goodyear Charles Goodyear (December 29, 1800 – July 1, 1860) was an American self-taught chemist and manufacturing engineer who developed vulcanized rubber , for which he received patent number 3633 from

1950-614: The Lower Naugatuck Valley in Connecticut, as rubber was adopted to multiple applications, including footwear and tires. The Goodyear Tire and Rubber Company is named after (though not founded by) him. Charles Goodyear was born on December 29, 1800, in New Haven, Connecticut , the son of Amasa Goodyear, and the oldest of six children. His father was a descendant of Stephen Goodyear, successor to Governor Eaton as

2015-498: The United States . However, even in the U.S., most children were not completing high school . High school education was necessary to become a teacher. In modern times, a larger percentage of those completing high school also attended college, usually to pursue a professional degree, such as law or medicine, or a divinity degree. Collegiate teaching was based on the classics (Latin, philosophy, ancient history, theology) until

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2080-510: The United States Patent Office on June 15, 1844. Goodyear is credited with inventing the chemical process to create and manufacture pliable, waterproof, moldable rubber. Goodyear's discovery of the vulcanization process followed five years of searching for a more stable rubber and stumbling upon the effectiveness of heating after Thomas Hancock . His discovery initiated decades of successful rubber manufacturing in

2145-473: The Built Environment or older studies such as Vers une Architecture from Le Corbusier describe the practice of architecture as an environment changing with new technologies, sciences, and legislation. All architects must be autodidacts to keep up to date with new standards , regulations , or methods . Self-taught architects such as Eileen Gray , Luis Barragán , and many others, created

2210-593: The Providence Company in Rhode Island . However, a method had not yet been found to process rubber so that it would withstand hot and cold temperatures and acids, and so the rubber goods were constantly growing sticky, decomposing and being returned to the manufacturers. From 1834 through 1839, Goodyear worked anywhere he could find investors, and often moved locations, mostly within New York, Massachusetts, Philadelphia, and Connecticut. In 1839, Goodyear

2275-469: The United States began to increase sharply in the early twentieth century. This phenomenon was seemingly related to increasing mechanization displacing child labor . The automated glass bottle-making machine is said to have done more for education than child labor laws because boys were no longer needed to assist. However, the number of boys employed in this particular industry was not that large; it

2340-466: The area. As a form of discovery learning , students in today's classrooms are being provided with more opportunity to "experience and interact" with knowledge, which has its roots in autodidacticism. Successful self-teaching can require self-discipline and reflective capability. Some research suggests that the ability to regulate one's own learning may need to be modeled to some students so that they become active learners, while others learn dynamically via

2405-684: The early nineteenth century. There were few if any institutions of higher learning offering studies in engineering or science before 1800. Institutions such as the Royal Society did much to promote scientific learning, including public lectures. In England, there were also itinerant lecturers offering their service, typically for a fee. Prior to the nineteenth century, there were many important inventors working as millwrights or mechanics who, typically, had received an elementary education and served an apprenticeship. Mechanics, instrument makers and surveyors had various mathematics training. James Watt

2470-438: The gum having rotted, making them useless. Goodyear at once made up his mind to experiment on this gum and see if he could overcome the problems with these rubber products. However, when he returned to Philadelphia , a creditor had him arrested and imprisoned. While there, he tried his first experiments with India rubber . The gum was inexpensive then, and by heating it and working it in his hands, he managed to incorporate in it

2535-504: The gum, and believed it had found means for manufacturing goods from it. It had a large plant and was sending its goods all over the country. It was some of Roxbury's goods that first attracted Goodyear's attention. Soon after this, Goodyear visited New York, and his attention went to life preservers , and it struck him that the tube used for inflation was not very effective nor well-made. Therefore, upon returning to Philadelphia, he made tubes and brought them back to New York and showed them to

2600-481: The head of the company London Merchants, who founded the colony of New Haven in 1638. Around 1817, Charles left his home and went to Philadelphia to learn the hardware business. He worked industriously until he was twenty-five years old, and then, returning to Connecticut , entered into a partnership in his father's business in Naugatuck, CT where they manufactured not only ivory and metal buttons, but also

2665-537: The highest impact strength can be obtained with a lower sulfur content of 30%. The rigidity of hard rubber at room temperature is attributed to the van der Waals forces between the intramolecular sulfur atoms. Raising the temperature gradually increases the molecular vibrations that overcome the van der Waals forces making it elastic. Hard rubber has a content mixture dependent density around 1.1 to 1.2. When reheated hard rubber exhibits shape-memory effect and can be fairly easily reshaped within certain limits. Depending on

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2730-489: The last of three patent disputes with fellow British rubber pioneer, Stephen Moulton , Hancock's patent was challenged with the claim that Hancock had copied Goodyear. Goodyear attended the trial. If Hancock lost, Goodyear stood to have his own British patent application granted, allowing him to claim royalties from both Hancock and Moulton. Both had examined Goodyear's vulcanized rubber in 1842, but several chemists testified that it would not have been possible to determine how it

2795-468: The law allowed experienced self-trained architects in practice to register. In Italy, it allowed self-trained architects with 10 years of experience to register. In The Netherlands, the " wet op de architectentitel van 7 juli 1987 " along with additional procedures, allowed architects with 10 years of experience and architects aged 40 years old or over, with 5 years of experience, to access the register. However, other sovereign states chose to omit such

2860-453: The major manufacturers of polymer balls). It has been used in electric plugs, tobacco pipe mouthpieces (in competition with Lucite ), fishing reels, hockey pucks , fountain pen bodies and nib feeds, saxophone and clarinet mouthpieces , as well as complete humidity-stable clarinets. Hard rubber is often seen as the wheel material in casters . It is also commonly used in physics classrooms to demonstrate static electricity , because it

2925-485: The manager of the Roxbury Rubber Company . The manager was pleased with the ingenuity that Goodyear had shown in manufacturing the tubes. He confessed to Goodyear that the business was on the verge of ruin and that his products had to be tested for a year before it could be determined if they were perfect or not. To their surprise, goods that they had determined to be of good quality were being returned,

2990-512: The mixture in place of the use of solvents. Goodyear sold some of these patents to Hiram Hutchinson who founded Hutchinson SA in France in 1853. In the year 1852, Goodyear went to Europe, a trip that he had long planned, and saw Thomas Hancock , then in the employ of Charles Macintosh & Company. Hancock claimed to have invented vulcanization independently, and received a British patent, initiated in 1843, but finalized in 1844. In 1855, in

3055-587: The role of philosophy in pedagogy in fourteenth-century Barcelona ; quarrels concerning astrology in Renaissance Florence in which Pico della Mirandola pleads for autodidacticism against the strong authority of intellectual establishment notions of predestination; and debates pertaining to experimentalism in seventeenth-century Oxford. Pleas for autodidacticism echoed not only within close philosophical discussions; they surfaced in struggles for control between individuals and establishments. In

3120-429: The same time, the failure of a number of business endeavors seriously embarrassed his firm. They struggled on, however, for some time, but were finally obliged to fail. Between the years 1831 and 1832, Goodyear heard about gum elastic (natural rubber) and examined every article that appeared in the newspapers relative to this new material. The Roxbury Rubber Company, of Boston , had been for some time experimenting with

3185-665: The story of Black American self-education, Heather Andrea Williams presents a historical account to examine Black American's relationship to literacy during slavery , the Civil War and the first decades of freedom. Many of the personal accounts tell of individuals who have had to teach themselves due to racial discrimination in education. Many successful and influential architects , such as Mies van der Rohe , Frank Lloyd Wright , Violet-Le-Duc , Tadao Ando were self-taught. There are very few countries allowing autodidacticism in architecture today. The practice of architecture or

3250-730: The study of nature and God was in the philosophical novel Hayy ibn Yaqdhan (Alive son of the Vigilant), whose titular hero is considered the archetypal autodidact. The story is a medieval autodidactic utopia, a philosophical treatise in a literary form, which was written by the Andalusian philosopher Ibn Tufail in the 1160s in Marrakesh . It is a story about a feral boy, an autodidact prodigy who masters nature through instruments and reason, discovers laws of nature by practical exploration and experiments, and gains summum bonum through

3315-405: The sulfur percentage hard rubber has a thermoplastic transition or softening temperature of 70 to 80 °C (158 to 176 °F). The material is brittle, which produces problems in its use in battery cases for example, where the integrity of the case is vital to prevent leakage of sulfuric acid . It has now been generally replaced by carbon black -filled polypropylene . Under the influence of

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3380-417: The trouble that they had experienced in working India Rubber might come from the solvent that was used. He therefore invented a huge machine for doing the mixing by mechanical means. The goods that were made in this way were beautiful to look at, and it appeared, as it had before, that all difficulties were overcome. Goodyear discovered a new method for making rubber shoes and received a patent which he sold to

3445-514: The ultraviolet portion of daylight, hard rubber oxidizes. Subsequent exposure to moisture bonds water with free sulfur on the surface, creating sulfates and sulfuric acid at the surface that are very hygroscopic . The sulfates condense water from the air, forming a hydrophilic film with favorable wettability characteristics on the surface. These aging processes will gradually discolor the surface grayish green to brown and cause rapid deterioration of electric surface resistivity. Contaminated ebonite

3510-400: The use of the title "architect", are now protected in most countries . Self-taught architects have generally studied and qualified in other fields such as engineering or arts and crafts . Jean Prouvé was first a structural engineer. Le Corbusier had an academic qualification in decorative arts. Tadao Ando started his career as a draftsman, and Eileen Gray studied fine arts . When

3575-425: The valuable agricultural implements that his firm had been manufacturing, and after the first distrust of domestically made goods had worn away—for all agricultural implements were imported from England at that time—he found himself heading a successful business. This continued to increase until it seemed that he was to be a wealthy man. Between 1829 and 1830 he broke down in health, being troubled with dyspepsia . At

3640-431: The whole dissolved in turpentine and spread upon the flannel cloth which served as the lining for the shoes. It was not long, however, before he discovered that the gum, even treated this way, became sticky. His creditors, completely discouraged, decided that he would not be allowed to go further in his research. Goodyear, however, had no mind to stop here in his experiments. Selling his furniture and placing his family in

3705-574: Was a surveyor and instrument maker and is described as being "largely self-educated". Watt, like some other autodidacts of the time, became a Fellow of the Royal Society and a member of the Lunar Society . In the eighteenth century these societies often gave public lectures and were instrumental in teaching chemistry and other sciences with industrial applications which were neglected by traditional universities. Academies also arose to provide scientific and technical training. Years of schooling in

3770-617: Was at the Eagle India Rubber Company in Woburn, Massachusetts , where he discovered that combining rubber and sulfur over a hot stove caused the rubber to become rigid, a process which he called vulcanization because of the heat involved. For this Goodyear received US patent number 1090 on February 24 of the same year. Several years earlier, Goodyear had started a small factory at Springfield, Massachusetts , to which he moved his primary operations in 1842. The factory

3835-655: Was informed that she had already died. He collapsed and was taken to the Fifth Avenue Hotel in New York City, where he died at the age of 59. In 1898, almost four decades after his death, The Goodyear Tire & Rubber Company was founded and named after Goodyear by Frank Seiberling . On February 8, 1976, he was among six individuals selected for induction into the National Inventors Hall of Fame . In Woburn, Massachusetts , there

3900-576: Was made by studying it. Hancock prevailed. Despite his misfortune with patents, Goodyear wrote, “In reflecting upon the past, as relates to these branches of industry, the writer is not disposed to repine, and say that he has planted, and others have gathered the fruits. The advantages of a career in life should not be estimated exclusively by the standard of dollars and cents, as is too often done. Man has just cause for regret when he sows and no one reaps.” Goodyear died on July 1, 1860, while traveling to see his dying daughter. After arriving in New York, he

3965-541: Was mechanization in several sectors of industry that displaced child labor toward education. For males in the U.S. born 1886–90, years of school averaged 7.86, while for those born in 1926–30, years of school averaged 11.46. One of the most recent trends in education is that the classroom environment should cater towards students' individual needs, goals, and interests. This model adopts the idea of inquiry-based learning where students are presented with scenarios to identify their own research, questions and knowledge regarding

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4030-408: Was named after and in honor of its inventor, Charles' son; Charles Goodyear Jr. Autodidacticism Autodidacticism (also autodidactism ) or self-education (also self-learning , self-study and self-teaching ) is the practice of education without the guidance of schoolmasters (i.e., teachers , professors , institutions ). Autodidacts are self-taught humans who learn

4095-475: Was problematic when it was used for electronics. During manufacturing the ebonite was rolled between metal foil sheets, which were peeled off, leaving traces of metal behind. For electronic use the surface was ground to remove these metal particles. Hard rubber was used in early 20th century bowling balls ; however, it was phased out in favor of other materials (the Ebonite name remains as a trade name for one of

4160-416: Was run largely by Nelson and his brothers. Charles Goodyear's brother-in-law, Mr. De Forest, a wealthy woolen manufacturer became involved as well. The work of making the invention practical was continued. In 1844, the process was sufficiently perfected and Goodyear received US patent number 3633, which mentions New York but not Springfield. Also in 1844, Goodyear's brother Henry introduced mechanical mixing of

4225-515: Was to go to Boston, where he became acquainted with J. Haskins, of the Roxbury Rubber Company. Goodyear found him to be a good friend, who lent him money and stood by him when no one would have anything to do with the visionary inventor. A man named Mr. Chaffee was also exceedingly kind and ever ready to lend a listening ear to his plans, and to also assist him in a pecuniary way. About this time it occurred to Mr. Chaffee that much of

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