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Al-Qalqashandi
Shihāb al-Dīn Abū 'l-Abbās Aḥmad ibn ‘Alī ibn Aḥmad ‘Abd Allāh al-Fazārī al-Shāfiʿī better known by the epithet al-Qalqashandī ( ar, شهاب الدين أحمد بن علي بن أحمد القلقشندي; 1355 or 1356 – 1418), was a medieval Egyptian encyclopedist, polymath and mathematician. A native of the Nile Delta, he became a Scribe of the Scroll (''Katib al-Darj''), or clerk of the Mamluk chancery in Cairo, Egypt. His magnum opus is the voluminous administrative encyclopedia ''Ṣubḥ al-Aʿshá''. ''Ṣubḥ al-aʿshā'' ''Ṣubḥ al-Aʿshá fī Ṣināʿat al-Inshāʾ'' ('The Dawn of the Blind' or 'Daybreak for the Night-Blind regarding the Composition of Chancery Documents'); a fourteen-volume encyclopedia completed in 1412, is an administrative manual on geography, political history, natural history, zoology, mineralogy, cosmography, and time measurement. Based on the ''Masālik al-abṣār fī mamālik al-amṣar'' of Shihab al-Umari, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyalphabetic Cipher
A polyalphabetic cipher substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case. The Enigma machine is more complex but is still fundamentally a polyalphabetic substitution cipher. History The work of Al-Qalqashandi (1355–1418), based on the earlier work of Ibn al-Durayhim (1312–1359), contained the first published discussion of the substitution and transposition of ciphers, as well as the first description of a polyalphabetic cipher, in which each plaintext letter is assigned more than one substitute. However, it has been claimed that polyalphabetic ciphers may have been developed by the Arab cryptologist Al Kindi (801–873) centuries earlier. The Alberti cipher by Leon Battista Alberti around 1467 was an early polyalphabetic cipher. Alberti used a mixed alphabet to encrypt a message, but whenever he wanted to, he would switch to a different alphabet, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banu Fazara
The Banu Fazara or Fazzara or Fezara or Fezzara () were an Arab tribe whose original homeland was Najd. Origins of the tribe According to Arab genealogical tradition, the progenitor of the Banu Fazara was Fazāra ibn Dhubyān ibn Baghīd ibn Rayth ibn Ghaṭafān. Thus the tribe belonged to the Dhubyan branch of the Ghatafan, making the Fazara a north Arabian tribe. Its ancestral pasture grounds were in the Wadi al-Rumma region of the Najd in central Arabia. In the modern day, the Fazara section of the Sudanese Arabs are camel-nomadic Arab tribes who live in the pastures of North Kordofan. They include the Shanabla, Majaneen, Bani-Jarrar, and Bani-Dhubian. Umm Qirfa Umm Qirfa Fatima was a leader of the Banu Fazara Arab tribe from Wadi Al-Qura. Ancient genealogies described Umm Qirfa as a member of the Banu Fazara. She married into the Banu Badr. According to Ibn Ishaq and al-Tabari, Umm Qirfa was wealthy. She was described as being an old woman with high social status and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Letter Frequencies
Letter frequency is the number of times letters of the alphabet appear on average in written language. Letter frequency analysis dates back to the Arab mathematician Al-Kindi (c. 801–873 AD), who formally developed the method to break ciphers. Letter frequency analysis gained importance in Europe with the development of movable type in 1450 AD, where one must estimate the amount of type required for each letterform. Linguists use letter frequency analysis as a rudimentary technique for language identification, where it is particularly effective as an indication of whether an unknown writing system is alphabetic, syllabic, or ideographic. The use of letter frequencies and frequency analysis plays a fundamental role in cryptograms and several word puzzle games, including Hangman, ''Scrabble'', '' Wordle'' and the television game show ''Wheel of Fortune''. One of the earliest descriptions in classical literature of applying the knowledge of English letter frequency to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
15th-century Mathematicians
The 15th century was the century which spans the Julian dates from 1 January 1401 ( MCDI) to 31 December 1500 ( MD). In Europe, the 15th century includes parts of the Late Middle Ages, the Early Renaissance, and the early modern period. Many technological, social and cultural developments of the 15th century can in retrospect be seen as heralding the "European miracle" of the following centuries. The architectural perspective, and the modern fields which are known today as banking and accounting were founded in Italy. The Hundred Years' War ended with a decisive French victory over the English in the Battle of Castillon. Financial troubles in England following the conflict resulted in the Wars of the Roses, a series of dynastic wars for the throne of England. The conflicts ended with the defeat of Richard III by Henry VII at the Battle of Bosworth Field, establishing the Tudor dynasty in the later part of the century. Constantinople, known as the capital of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
15th-century Egyptian People
The 15th century was the century which spans the Julian dates from 1 January 1401 ( MCDI) to 31 December 1500 ( MD). In Europe, the 15th century includes parts of the Late Middle Ages, the Early Renaissance, and the early modern period. Many technological, social and cultural developments of the 15th century can in retrospect be seen as heralding the "European miracle" of the following centuries. The architectural perspective, and the modern fields which are known today as banking and accounting were founded in Italy. The Hundred Years' War ended with a decisive French victory over the English in the Battle of Castillon. Financial troubles in England following the conflict resulted in the Wars of the Roses, a series of dynastic wars for the throne of England. The conflicts ended with the defeat of Richard III by Henry VII at the Battle of Bosworth Field, establishing the Tudor dynasty in the later part of the century. Constantinople, known as the capital of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Mathematicians
As a means of recording the passage of time, the 14th century was a century lasting from 1 January 1301 ( MCCCI), to 31 December 1400 ( MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of Charles IV, King of France led to a claim to the French throne by Edward III, King of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been ever establish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Egyptian People
As a means of recording the passage of time, the 14th century was a century lasting from 1 January 1301 ( MCCCI), to 31 December 1400 ( MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of Charles IV, King of France led to a claim to the French throne by Edward III, King of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been ever esta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
15th-century Arabs
The 15th century was the century which spans the Julian dates from 1 January 1401 ( MCDI) to 31 December 1500 ( MD). In Europe, the 15th century includes parts of the Late Middle Ages, the Early Renaissance, and the early modern period. Many technological, social and cultural developments of the 15th century can in retrospect be seen as heralding the " European miracle" of the following centuries. The architectural perspective, and the modern fields which are known today as banking and accounting were founded in Italy. The Hundred Years' War ended with a decisive French victory over the English in the Battle of Castillon. Financial troubles in England following the conflict resulted in the Wars of the Roses, a series of dynastic wars for the throne of England. The conflicts ended with the defeat of Richard III by Henry VII at the Battle of Bosworth Field, establishing the Tudor dynasty in the later part of the century. Constantinople, known as the capital of the world ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Arabs
As a means of recording the passage of time, the 14th century was a century lasting from 1 January 1301 ( MCCCI), to 31 December 1400 ( MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of Charles IV, King of France led to a claim to the French throne by Edward III, King of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1418 Deaths
Year 1418 ( MCDXVIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events January–December * January 31 – Mircea I of Wallachia is succeeded by Michael I of Wallachia. * April 22 – The Council of Constance ends. * May 29 – John the Fearless, Duke of Burgundy, captures Paris. * July – The English Siege of Rouen begins. * September 18 – King Taejong (r. 1400-1418) of the Joseon dynasty abdicates the throne. King Sejong ascends to the throne. Date unknown * João Gonçalves Zarco leads one of the first Portuguese expeditions to the Madeira Islands. Births * January 9 – Juan Ramón Folch III de Cardona, Aragonese admiral (d. 1485) * March 14 – Philip II, Count of Nassau-Weilburg (1429–1492) (d. 1492) * April 20 – Earl David of Rookwood * May 16 – John II of Cyprus, King of Cyprus and Armenia and also titular King of Jerusalem from 1432 to 1458 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1350s Births
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135 may refer to: *135 (number) *AD 135 *135 BC *135 film, better known as 35 mm film, is a format of photographic film used for still photography *135 (New Jersey bus) 135 may refer to: *135 (number) *AD 135 *135 BC *135 film 135 film, more popularly referred to as 35 mm film or 35 mm, is a format of photographic film used for still photography. It is a film with a film gauge of loaded into a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Journal Of Middle East Studies
The ''International Journal of Middle East Studies'' is a scholarly journal published by the Middle East Studies Association of North America (MESA), a learned society. See also * Middle East Research and Information Project * Association for the Study of the Middle East and Africa * '' Middle East Quarterly'' References External links IJMES Editorial Officeat The Graduate Center, CUNY On-line archiveat Cambridge University Press Cambridge University Press is the university press of the University of Cambridge. Granted letters patent by King Henry VIII in 1534, it is the oldest university press in the world. It is also the King's Printer. Cambridge University Pr ... Middle Eastern studies in the United States Non-Islamic Islam studies literature Quarterly journals Cambridge University Press academic journals English-language journals Middle Eastern studies journals Academic journals associated with learned and professional societies Publications est ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
