File Spirale Ulam 150.jpg thumb The Ulamspiral to 150 iterations. Red dots represent prime numbers blue .... The Ulamspiral , or prime spiral in other languages also called the Ulam Cloth is a simple method ... year, Martin Gardner wrote about the Ulamspiral in his Recreational mathematics Mathematical Games column sfn Gardner 1964 p 122 the Ulamspiral featured on the front cover of the issue of Scientific American in which the column appeared. Construction Ulam constructed the spiral by writing ... ing out Image Ulamspiral howto all numbers.svg 200px center Numbers from 1 to 49 placed in spiral order He then circled all of the prime numbers and he got the following picture Image Ulamspiral howto primes only.svg 200px center Small Ulamspiral Image Ulam 1.png right thumb Ulamspiral ... 200 Ulamspiral, where primes are black, is shown at right. Diagonal lines are clearly visible, confirming ... numbers, except for the number 2, are odd numbers. Since in the Ulamspiral adjacent diagonals are alternatively ... of the Ulamspiral. What is startling is the tendency of prime numbers to lie on some diagonals ..., one of which, if true, would explain some of the striking features of the Ulamspiral ... bx c . Rays emanating from the central region of the Ulamspiral making angles of 45 with the horizontal .... An unusually rich polynomial is 4 x sup 2 sup 2 x 41 which forms a visible line in the Ulamspiral ... Sacks spiral.svg 300px right Robert Sacks devised a variant of the Ulamspiral in 1994. In the Sacks .... In the Ulamspiral, two squares occur in each rotation. Euler s prime generating polynomial, x sup ... approaches a horizontal line in the left half of the figure. In the Ulamspiral, Euler s polynomial ... dux1TBAmndM Video showing the construction of the UlamSpiral http data1.root space.eu xi xi16j7lk.jpg a 2000 x 2000 UlamSpiral http www.ulamspiral.com generatePage.asp?ID 20 a 100000 x 100000 Ulam ... ru scn Spirali di Ulam sl Ulamov prt fi Ulamin spiraali sv Ulams spiral ... more details
Ulam may refer to Surname Adam Ulam 1922 2000 , Polish American professor of history and political science at Harvard University Stanislaw Ulam 1909 1984 , Polish born American mathematician who participated in the Manhattan Project Other Ulam salad , a type of Malay salad ULAM , Naryan Mar Airport by ICAO airport code Ulam, the language spoken by the prehistoric humans in the movie Quest for Fire film Quest for Fire Ulamspiral , or prime spiral. A simple method of visualizing the prime numbers that reveals the apparent tendency of certain quadratic polynomials to generate unusually large numbers of primes. Named after Stanislaw Ulam . surname disambig ... more details
right thumb 300px When the positive integers are arrayed along the Ulamspiral , prime numbers ... stability Lucky number col 2 UlamspiralUlam conjecture in Number Theory Reconstruction conjecture ...Infobox scientist name Stanislaw Ulam image Stanislaw Ulam ID badge.png image size 240px caption Ulam ... for Teller Ulam design br Monte Carlo method br Fermi Pasta Ulam problem br Nuclear pulse propulsion ... Stanislaw Marcin Ulam 13 April 1909 &ndash 13 May 1984 was a renowned mathematician of Polish Jews Polish Jewish origin. He participated in America s Manhattan Project , originated the Teller Ulam ..., proved many theorems, and proposed several conjectures. Poland Ulam was born in Lviv Habsburg Empire ... professionals. Ulam s immediate family was well to do but hardly rich . ref name AULAM His father, J zef Ulam, was born in Lw w and was a lawyer, and his mother, Anna Auerbach, was born in Stryi Stryj . ref name FAMILY His uncle, Michael Ulam, was an architect, building contractor, and lumber ..., Ulam entered Lw w Gymnasium Nr. VII, from which he graduated in 1927. ref name AJMAA Soon, he began ..., Ulam was a member of the Lw w School of Mathematics . Its founders were Hugo Steinhaus and Stefan ... in the famous Scottish Book , which is a thick notebook provided by Banach s wife. Ulam is a major ... it into English. In 1981, Ulam s friend Daniel Maudlin published an expanded and annotated version. ref name MAUDLIN Coming to America In 1935, John von Neumann , whom Ulam had met in Warsaw, invited .... In December of that year, Ulam sailed to America. At Princeton, he went to lectures and seminars ... up on Birkhoff s suggestion, Ulam spent summers in Poland and academic years at Harvard University ... in 1941. ref name AJMAA On August 20, 1939, in Gdynia , J zef Ulam, along with his brother Szymon, put his two sons, Stanislaw and 17 year old Adam Ulam Adam , on a ship headed for America. ref name ... occupied eastern Poland. Within two years, J zef Ulam and the rest of his family were victims of the Holocaust ... more details
Ulam , a traditional salad produced from the leaves of Centella asiatica , is typically eaten with anchovy anchovies , cincalok or shrimp paste . It is recognised as a popular main dish in traditional Malaysia Malay villages. Fact date May 2009 Ulam can be eaten simply as it is, or with cucumber , cabbage and eggplant . Another type of ulam is traditional ulam , in which it is used more as an ingredient, such as in nasi ulamulam rice , ref name recipe cite web url http peranakan.org.sg index.php?option com content&task view&id 24&Itemid 36 title Nasi ulam accessdate 2009 05 07 ref nasi kerabu a type of bluish coloured rice and cooking with other vegetables. It also has its uses in traditional medicine , such as diabetes and high blood pressure . Fact date May 2009 Further reading Wan Hassan, W.E. and M. Mahmood. 2010 Ulam Salad Herbs of Malaysia. Kuala Lumpur MASBE. See also Lalab , a similar, traditional Sundanese cuisine Sundanese dish Malay cuisine References reflist Category Malaysian cuisine Category Malay cuisine ms Ulam ... more details
File Nasi Ulam Betawi.jpg thumb right 260px Nasi ulam Betawi Jakarta style, topped with dendeng sapi beef jerky , krupuk , and omelette. Nasi ulam is a steamed rice dish mixed with various herbs, especially the leaves of pegagan Centella asiatica or often replaced with kemangi lemon basil , vegetables, spices and accompanied with various side dishes. This dish is a Malay cuisine , it have many variations and commonly found in Malaysia and Indonesia . In Indonesia, nasi ulam can be found in Betawi people Betawi native Jakartans cuisine as well as Sumatran Ethnic Malays Malay and Bali . In Jakarta there are two types of nasi ulam, the wet soupy nasi ulam of northern and central Jakarta, and dry one of southern Jakarta. In Indonesia, nasi ulam usually spiced with kemangi herb, chili and sprinkled with peanuts granule, kerisik grated and sauted coconut or serundeng . The array of other additional dishes usually added on top of nasi ulam, such as dendeng beef jerky , telur dadar omelette , perkedel mashed potato fritter , fried tofu or tempeh , and krupuk . Nasi ulam in Malaysia consist of cold boiled rice that is mixed with shredded herbs such as daun kaduk wild pepper leaf , pucuk gajus ... fish is mixed in. This version is common in North West Peninsular Malaysia. A type of nasi ulam in North East Peninsular Malaysia is called nasi kerabu. See also Ulam salad Nasi bogana Nasi campur Nasi ... links http inforesep.com resep nasi ulam lengkap.html Nasi Ulam recipe 1 in Indonesian http www.resepkita.com detailResep.asp?recId 260 Nasi Ulam recipe 2 in Indonesian http www.lintasberita.com Lifestyle Kuliner Resep Nasi Ulam Bali Balinese Nasi Ulam recipe in Indonesian http melayuonline.com ind culture dig 1962 nasi ulam Nasi Ulam Melayu in Indonesian http photoblog.rasamalaysia.com nasi ulam Photo of Nasi Ulam in Malaysia Indonesian cuisine Malaysian cuisine Rice dishes Category Indonesian cuisine Category Malay cuisine Category Malaysian cuisine Category Rice dishes id Nasi ulam ... more details
An Ulam number is a member of an integer sequence devised by and named after Stanislaw Ulam , who introduced it in 1964. ref harvs last Ulam year 1964a year2 1964b txt authorlink Stanislaw Ulam . ref The standard Ulam sequence the 1, 2 Ulam sequence starts with U sub 1 sub 1 and U sub ... of two distinct earlier terms in exactly one way. Examples By the definition, 3 is an Ulam number 1 2 and 4 is an Ulam number 1 3 . 2 2 is not a secondary representation of 4, because the previous terms must be distinct. The integer 5 is not an Ulam number, because 5 1 ..., 36, 38, 47, 48, 53, 57, 62, 69, 72, 77, 82, 87, 97, 99 OEIS id A002858 . The first Ulam numbers that are also ..., 983, 991, 1103, 1433, 1489 OEIS id A068820 . Infinite sequence There are infinitely many Ulam numbers ... . He states that, if there were finitely many Ulam numbers, then the sum of the last two would also be an Ulam number &ndash a contradiction. However, although the sum of the last two numbers would in this case have a unique representation as a sum of two Ulam numbers, it would not necessarily be the smallest number with a unique representation. ref Ulam is said to have conjectured that the numbers have zero Natural density density , ref The statement that Ulam made this conjecture is in OEIS OEIS2C id A002858 , but Ulam does not address the density of this sequence in harvtxt Ulam 1964a , and in harvtxt Ulam 1964b he poses the question of determining its density without conjecturing a value for it. harvtxt Recaman 1973 repeats the question from harvtxt Ulam 1964b of the density ... as u , v Ulam numbers by selecting different starting values u , v . A sequence of u , v Ulam numbers is regular if the sequence of differences between consecutive numbers in the sequence is eventually periodic. When v is an odd number greater than three, the 2, v Ulam numbers are regular. When v is congruent to 1 mod 4 and at least five, the 4, v Ulam numbers are again ... more details
Wikify date September 2011 In mathematics, Ulam s game , or the R nyi Ulam game , is the problem of trying to guess an object with yes no questions, where some of the answers may be wrong. harvs txt last R nyi authorlink Alfr d R nyi year 1961 introduced the game, though his paper was overlooked for many years, and harvs txt last Ulam authorlink Stanislaw Ulam year 1975 loc p. 281 rediscovered the game, asking about the case where there are a million objects and the answer to one question can be wrong. harvtxt Pelc 2002 gave a survey of similar games and their relation to information theory . References Citation last1 Pelc first1 Andrzej title Searching games with errors fifty years of coping with liars doi 10.1016 S0304 3975 01 00303 6 mr 1871067 year 2002 journal Theoretical Computer Science journal Theoretical Computer Science issn 0304 3975 volume 270 issue 1 pages 71 109 Citation last1 R nyi first1 Alfr d title On a problem in information theory language Hungarian mr 0143666 year 1961 journal Magyar Tud. Akad. Mat. Kutat Int. K zl. volume 6 pages 505 516 Citation last1 Ulam first1 S. M. title Adventures of a mathematician url http books.google.com books?id U2 zEZOHdU4C publisher Charles Scribner s sons isbn 978 0 520 07154 4 mr 0485098 year 1976 Category Mathematical games Category Information theory ... more details
Hatnote For other uses of this word, see spiral disambiguation . Refimprove date July 2007 Image NautilusCutawayLogarithmicSpiral.jpg ... in an approximately logarithmic spiral . In mathematics , a spiral is a curve which emanates from a central point, getting progressively farther away as it revolves around the point. Spiral or helix Image Schraube und archimedische Spirale.png right thumb An Archimedean spiral, a helix, and a conic spiral. While a spiral and a helix are distinct as technical terms, a helix is sometimes described as a spiral in non technical usage. The two primary definitions of a spiral are provided by the American Heritage Dictionary ref name free http www.thefreedictionary.com spiralSpiral ref a. A curve ... of a spiral galaxy a Logarithmic spiral are examples of a spiral. The second definition is for the 3 Dimensional variant of a spiral, for example a conical spring device can be described as a spiral ... and width of a helix typically remain static and do not grow like on a planar spiral. If they do, then the helix becomes a conic helix. You can make a conic helix with an Archimedean or equiangular spiral by giving height to the center point, thereby creating a cone shape from the spiral. ref http docs.autodesk.com ... at the bottom is an Archimedean spiral , while the green curve is a helix. A cross between a spiral ... A two dimensional spiral may be described most easily using polar coordinates , where the radius ... . Some of the more important sorts of two dimensional spirals include The Archimedean spiral math r a b cdot theta math see also Involute The Euler spiral , Cornu spiral or clothoid Fermat s spiral math r theta 1 2 math The hyperbolic spiral math r a theta math The Lituus mathematics lituus math r theta 1 2 math The logarithmic spiral math r a cdot e b theta math approximations of this are found in nature The Fibonacci spiral and golden spiral special cases of the logarithmic spiral The Spiral of Theodorus an approximation of the Archimedean spiral composed of contiguous right triangles ... more details
Image Adam Ulam.jpg thumb right 200px Adam Ulam Adam Bruno Ulam 1922 2000 was a Polish and American historian and political scientist at Harvard University . Ulam was one of the world s foremost authorities on Russia and the Soviet Union , and author of twenty books and many articles. Biography Ulam was born on April 8, 1922 in Lw w Lviv , then Second Polish Republic Poland now Ukraine . After graduating from high school, he emigrated to the United States on or around August 20, 1939, to go to college. This was but days before the invasion of Poland German invasion of Poland which marked the beginning of the Second World War . His father had, at the last minute, changed his departure date from September 3 to August 20, most likely saving his life since Poland was invaded by Germany on September 1. His entire family, save for his brother Stanis aw Ulam , a famous mathematician and key contributor to the Manhattan Project , would perish in The Holocaust . After the United States entered the war, he tried to enlist in the army, but was rejected at first for having relatives living in enemy territory and later, after a second attempt, for near sightedness. He studied at Brown University , taught shortly at University of Wisconsin Madison , and obtained a Ph.D. from Harvard University ..., Mark, Memorial Notice Adam Bruno Ulam 1922 2000 , Journal of Cold War Studies , Volume 2, Number ... Crystal Reference Encyclopedia on Adam Bruno Ulam http daviscenter.fas.harvard.edu news events Ulam minute.doc Harvard News and Events Memorial Minute Adam Bruno Ulam read by Timothy J. Colton in 2002 and printed in the Harvard University Gazette http www.aulam.org index.htm Adam Ulam s memorial ... ulam.html Harvard Gazette Obituary Persondata Metadata see Wikipedia Persondata . NAME Ulam, Adam ... DEFAULTSORT Ulam, Adam Category 1922 births Category 2000 deaths Category Jews from Galicia Eastern ... Category People from Lviv Category Deaths from lung cancer fr Adam Ulam ja pl Adam Ulam ru ... more details
Spiral Scratch may refer to Spiral Scratch EP Spiral Scratch EP , a 1977 EP by Buzzcocks Spiral Scratch Doctor Who Spinal Scratch Doctor Who , a novel by Gary Russell disambig ... more details
Spiral staircase may refer to A type of stairway Spiral and helical stairs stairway characterized by its spiral shape The Spiral Staircase 1946 film The Spiral Staircase 1946 film , a 1946 American psychological thriller film The Spiral Staircase 1975 film The Spiral Staircase 1975 film , a 1975 British film, a remake of the 1946 film The Staircase 1998 film The Staircase 1998 film , a 1998 television film about the spiral staircase at the Loretto Chapel , starring Barbara Hershey and William Petersen . The Spiral Staircase 2000 film The Spiral Staircase 2000 film , a 2000 television film remake of the 1946 film Spiral Staircase D espairsRay DVD Spiral Staircase D espairsRay DVD , 2008 Spiral Staircase Ralph McTell album Spiral Staircase Ralph McTell album , 1969 Spiral Staircase Classic Songs , a 1997 compilation album by Ralph McTell Spiral Staircase , a song by Kings of Leon from the 2003 album Youth and Young Manhood See also Spiral Starecase , an American band Spiral Stairs , nickname of Scott Kannberg disambiguation ... more details
A spiral minaret is a feature of the Great Mosque of Samarra the Mosque with the Spiral Minaret Burmal Mescit Camii , Istanbul disambiguation ... more details
wiktionary spiral A spiral is a curve which emanates from a central point, getting progressively farther away as it revolves around the point. Spiral may also refer to tocright Science and mathematics Spiral galaxy , a type of galaxy in astronomy Spiral Dynamics , a theory of human development Spiral cleavage , a type of cleavage in embryonic development Transport Spiral railway , a technique employed by railways to ascend steep hills AT 6 Spiral , an anti tank missile Mikoyan Gurevich MiG 105 Mikoyan Gurevich MiG 105 Spiral , a Soviet spaceplane Spiral dive , a type of generally undesirable and accidental descent manoeuvre in an aircraft Film and television Spiral 1978 film Spiral 1978 film , a 1978 Polish film Spiral 2007 film Spiral 2007 film , a 2007 American film Spiral TV series Spiral ... series Engrenages Spiral The Bonds of Reasoning , a Japanese anime series Uzumaki film Uzumaki film , translated as spiral, a Japanese horror film based on the manga of the same name Rasen , translated as spiral, a sequel to the film Ring Spiral Buffy the Vampire Slayer Spiral Buffy the Vampire Slayer , a 2001 episode of the TV series Buffy the Vampire Slayer Spiral Haven Spiral Haven , an episode of the American Canadian television series Haven Glen Coroner , known as Spiral, an Irish rapper and contestant in the UK Big Brother TV show 2006 Books and comics Spiral novel Spiral novel , a 1995 Japanese book in the Ring series Spiral comics , a Marvel Comics character Spiral The Bonds of Reasoning , a mystery anime and manga series Uzumaki , translated as Spiral, a horror manga Spiral Tunnels novel , a 2011 12 novel and the 5th in the Tunnels series by Roderick Gordon. Music Spiral Vangelis album Spiral Vangelis album , 1977 Spiral Andrew Hill album Spiral Andrew Hill album Spiral Hiromi album Spiral Hiromi album , 2006 Spiral Stockhausen Spiral Stockhausen , a 1968 process music composition by Karlheinz Stockhausen Spirals album Spirals album , a 2003 album by Blood Has Been Shed Spiral ... more details
wiktionary Death spiral may refer to Spiral dive , a terminal situation in flying Death spiral figure skating , an element of pair skating Death spiral insurance , an insurance plan whose costs are rapidly increasing Death spiral financing Ant mill , a behavioral phenomenon in ants disambig ... more details
DISPLAYTITLE Ulam raja Cosmos caudatus Taxobox name Ulam raja image YosriUlamRaja1.jpg image caption regnum Plant ae divisio wild cosmos classis ordo familia Compositae genus species binomial Cosmos caudatus binomial authority Ulam raja , literally meaning the King s salad , was brought by the Spaniards from Latin America , via the Philippines , to the rest of Southeast Asia . ref Bodeker, G. 2009 . Health and Beauty from the Rainforest Malaysian Traditions of Ramuan . Kuala Lumpur Didier Millet. ISBN 978 981 4217 91 0 ref Ulam, a Malay language Malay word used to describe a preparation that combines food, medicine and beauty is the widely popular Malay herbal salad. As a Malaysian delight, it is served throughout the country from major hotels for tourists to buffet lunches or dinners for the locals. Description Ulam Raja is an annual plant growing up 2 m in height. The leaf leaves are soft and pungent while the stem is light green with a purplish hue and succulent. As night falls the leaves fold to close the terminal buds as the plant literally sleeps. The flowers can be found solitary or in a loose clusters and are produced on a single stalk on auxiliary heads. ref Hassan, Dr. W. E. 2006 . Healing Herbs of Malaysia Kuala Lumpur Federal Land Development Agency. ISBN 978 983 99544 2 5 ref Traditional uses The Malay people believe that the herb is good for health and contains anti aging properties or awet muda, and that it tones up blood circulation, strengthens the bones and promotes fresh breath. cn date November 2011 Notes reflist References Hassan, Dr. W. E. 2006 . Healing Herbs of Malaysia . Kuala Lumpur Federal Land Development Agency. ISBN 978 983 99544 2 5 Bodeker, G. 2009 . Health and Beauty from the Rainforest Malaysian Traditions of Ramuan . Kuala Lumpur Didier Millet. ISBN 978 981 4217 91 0 DEFAULTSORT Ulam Raja Cosmos Caudatus Category Medicinal plants ms Ulam raja Cosmos caudatus ... more details
The stability problem of functional equation s originated from a question of Stanislaw Ulam , posed in 1940, concerning the stability of group homomorphism s. In the next year, Donald H. Hyers gave a partial affirmative answer to the question of Ulam in the context of Banach space s, that was the first significant breakthrough and a step toward more solutions in this area. Since then, a large number of papers have been published in connection with various generalizations of Ulam s problem and Hyers s theorem. In 1978, Themistocles M. Rassias succeeded in extending the Hyers s theorem by considering an unbounded Cauchy difference. ref Th.M. Rassias, http www.jstor.org stable 2042795?seq 1 On the stability .... By regarding a large influence of S. M. Ulam , D. H. Hyers, and Th. M. Rassias on the study of stability ... of what is now known as Hyers Ulam Rassias stability ref S. M. Jung, Hyers Ulam Rassias ... 9636 7. ref ref Hyers Ulam Rassias stability , in Encyclopaedia of Mathematics, Supplement III, M. Hazewinkel ... s. References Reflist See also Soon Mo Jung, Hyers Ulam Rassias Stability of Functional Equations in Mathematical ... content j7660635qh228m81 On the stability of functional equations and a problem of Ulam , Acta Applicandae ... 1& urlVersion 0& userid 83473&md5 32f25b33ce19cdf5b0fdf58031a327fc&searchtype a Hyers Ulam Rassias ... 4 441.pdf Hyers Ulam Rassias stability of Jordan homomorphisms on Banach algebras , J. Inequal ...&searchtype a A generalization of the Hyers Ulam Rassias stability of approximately additive ... Hyers Ulam Rassias stability , Int. J. Nonlinear Anal. Appl. 1 2010 , No. 2, 6 pp ...&searchtype a Hyers Ulam Rassias stability of homomorphisms in quasi Banach algebras associated to the Pexiderized ..., On the Hyers Ulam Rassias stability of Jensen s equation , Bull. Korean Math. Soc. 46 4 2009 , 645 ... a Hyers Ulam Rassias stability of a Jensen type functional equation , J. Math. Anal. Appl. 250 ... Topics , Cluj University Press, Cluj, 2008. DEFAULTSORT Hyers Ulam Rassias Stability Category Mathematical ... more details
In mathematics, the Mazur Ulam theorem states that if math V math and math W math are normed space s over R and the map mathematics map ping math f colon V to W math is a surjective isometry , then math f math is affine transformation affine . References cite book author Richard J. Fleming coauthors James E. Jamison title Isometries on Banach Spaces Function Spaces publisher CRC Press isbn 1584880406 page 6 year 2003 cite journal author1 Stanis aw Mazur authorlink1 Stanis aw Mazur author2 Stanislaw Ulam authorlink2 Stanislaw Ulam title Sur les transformationes isom triques d espaces vectoriels norm s journal C. R. Acad. Sci. Paris volume 194 year 1932 pages 946 948 External links http www.helsinki.fi jvaisala mazurulam.pdf A proof PDF Category Normed spaces Category Theorems in functional analysis mathanalysis stub pl Twierdzenie Mazura Ulama ... more details
In mathematics , the Borsuk Ulam theorem , named after Stanis aw Ulam and Karol Borsuk , states that every continuous function from an n sphere n sphere into Euclidean space Euclidean n space maps some pair of antipodal point s to the same point. Here, two points on a sphere are called antipodal if they are in exactly opposite directions from the sphere s center. According to Harvnb Matou ek 2003 p 25 , the first historical mention of the statement of this theorem appears in Harvnb Lyusternik 1930 . The first proof was given by Harvnb Borsuk 1933 , where the formulation of the problem was attributed to Ulam. Since then, many alternate proofs have been found out by various authors as collected in Harvnb Steinlein 1985 . Theorem We use the stronger statement that every odd antipode preserving mapping h S sup n 1 sup &rarr S sup n 1 sup has odd degree of a mapping degree . Using the above theorem it is easy to see that the original Borsuk Ulam statement is correct since if we take a map f S sup n sup &rarr sup n sup that does not equalize on any antipodes then we can construct a map g S sup n sup &rarr S sup n 1 sup by the formula math g x frac f x ... a pair x , &minus x of antipodal points. this is equivalent to the Borsuk Ulam theorem The Ham ... Ji Matou ek mathematician first Ji last Matou ek title Using the Borsuk Ulam theorem publisher ... Ulam Implies Brouwer A Direct Construction first Francis Edward last Su journal The American Mathematical ... su papers.dir borsuk.pdf DEFAULTSORT Borsuk Ulam Theorem Category Algebraic topology Category Combinatorics Category Continuous mappings Category Theorems in topology ca Teorema de Borsuk Ulam da Borsuk Ulams s tning de Satz von Borsuk Ulam fr Th or me de Borsuk Ulam ko it Teorema di Borsuk Ulam hu Borsuk Ulam t tel nl Stelling van Borsuk Ulam pl Twierdzenie Borsuka Ulama pt Teorema de Borsuk Ulam ru fi Borsukin Ulamin lause uk zh ... more details
Spiral binding may refer to Spiral Binding Process also known as coil binding . Spiral Binding Company Inc Creators of Spiral Binding disambiguation Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ... more details
context date June 2011 File Spiral logarithmic antenna.jpg thumb Two arm log spiral antenna In microwave systems, a spiral antenna is a type of RF Antenna radio antenna . It is shaped as a two arm spiral ... Edition, ISBN 0 07 032291 0, 1961, Chapter 14 2 ref Spiral antennas were first described in 1956 ... Radio Publications, Inc pages 185 186 ref . Spiral antennas belong to the class of frequency independent ... are inherently circularly polarized with low gain. Array of spiral antennas can be used to increase the gain. Spiral antennas are reduced size antennas with its windings making it an extremely small structure ... pattern is usually preferred in such antennas. Spiral antennas are classified into different types archimedean spiral, square spiral and star spiral etc. Archimedean spiral is the most popular configuration ... wave, formed on spiral arms, allows for broadband performance, fast wave due to mutual coupling phenomenon occurring between arms of spiral and leaky wave leaks the energy during propagation through the spiral arms to produce radiation. Ring theory band theory explains the working principle of spiral antenna. The theory states that spiral antenna radiates from a region called active region where the circumference of spiral equals wavelength. ref A. Mehta, D. Mirshekar Syahkal and H. Nakano , Beam adaptive single arm rectangular spiral antenna with switches , Microwaves, Antennas and Propagation ... designing a square spiral antenna. The parameters include spacing between the turns s , width of arm w , inner radius r1 and outer radius r2 . The inner radius is measured from center of the spiral to center of the first turn while the outer radius is measured from center of the spiral to center of the outermost turn. Other than these design parameters, spiral antennas have lowest flow c 2 r2 ... system, spiral grows along r axis and axis simultaneously. All spirals satisfy r a b equation ... of spiral antenna can be obtained by varying number of turns it contains, the spacing between its ... more details
Image Lentulo.JPG 350px thumb right A lentulo spiral. The notches at left allow it to fit into a slow speed latch handpiece. A Lentulo spiral is a dental instrument used to properly distribute root canal sealer and cement evenly throughout the root canal system, as when performing root canal therapy endodontic therapy or a post and core cementation. The instrument has an atypical left handed screw threading like the screw in the left pedal of a bicycle so that the application of sealer or cement will flow down the tip of the spiral when the slow speed is in forward mode. A common criticism of the lentulo spiral is that the long term failures resulting from marginally poorer cement sealer distribution are less problematic than the possibility of the spiral breaking inside the root canal. Proper use, maintenance, and disposal of old instruments should minimize breakage however. Maillefer s Lentulo spiral, produced by Dentsply , is the only one licensed to use the Lentulo name however, the term is generally used to refer to any of the various brands of root canal sealer and cement distributing spirals. References http iadr.confex.com iadr 2004Hawaii techprogram abstract 41998.htm Clinical Evaluation of Root Canal Obturation Methods in Primary Teeth O.A. BAWAZIR, King Saud University, Riyadh, Saudi Arabia, F.S. SALAMA, University of Nebraska, Omaha, US. External links http www.dentsply.ca product 940 Lentulo spiral, by Dentsply Canada commonscat Lentulo spiral Category Dental equipment de Rotierende zahn rztliche Instrumente fa it Spirale di Lentulo ... more details
The Fermi&ndash Ulam model FUM is a dynamical system that was introduced by Poland Polish mathematician Stanislaw Ulam in 1961. FUM is a variant of Enrico Fermi Enrico Fermi s primary work on acceleration of cosmic ray s, namely Fermi acceleration . The system consists of a particle that collides elastically between a fixed wall and a moving one, of infinite mass each. The walls represent the magnetic mirror s with whom the cosmic rays cosmic particles collide. A. J. Lichtenberg and M. A. Lieberman provided a simplified version of Fermi Ulam model FUM SFUM that derives from the Poincar map Poincar surface of section math x const. math and writes math u n 1 u n U mathrm wall varphi n , math extra blank line between two TeX displays for legibility math varphi n 1 varphi n frac kM u n 1 pmod k, math where math u n math is the velocity of the particle after the math n math th collision with the fixed wall, math varphi n math is the corresponding phase of the moving wall, math U mathrm wall math is the velocity law of the moving wall and math M math is the stochasticity parameter of the system. If the velocity law of the moving wall is differentiable enough, according to Kolmogorov Arnold Moser theorem KAM theorem invariant curves in the phase space math varphi,u math exist. These invariant curves act as barriers that do not allow for a particle to further accelerate and the average velocity of a population of particles saturates after finite iterations of the map. For instance, for sinusoidal ... non linear dynamics and Map mathematics coupled mappings . The rigorous solution of the Fermi Ulam ... in ref L.D. Pustyl nikov, 1983 . On a problem of Ulam. Teoret. Mat.Fiz.57, 128 132. Engl. transl. in Theoret ... considers the Fermi Ulam model in the framework of the special theory of relativity, then under ... of the Fermi Ulam model. Theoret. Math. Phys. 77 1 , 1110 1115. ref 2D Generalization Though the 1D .... A. Lieberman Appl. Math. Sci. vol 38 New York Springer . DEFAULTSORT Fermi Ulam Model Category ... more details
font spiral is made from quarter circles tangent to the interior of each square, while the font color 800000 red font spiral is a golden spiral, a special type of logarithmic spiral . Overlapping portions ... smaller square is in the golden ratio . In geometry , a golden spiral is a logarithmic spiral whose ... GoldenSpiral Golden Spiral , The Wolfram Demonstrations Project . ref That is, a golden spiral ... The polar equation for a golden spiral is the same as for other logarithmic spiral s, but with a special ... of this value Image Fibonacci spiral 34.svg right thumb A Fibonacci number Fibonacci spiral approximates the golden spiral unlike the whirling rectangle diagram based on the golden ratio ... formula for a logarithmic and golden spiral is ref cite book title Symmetries of Nature A Handbook ... books?id rqzaQo6CaA0C&pg PA200&dq 22golden spiral 22 log isbn 3 11 012990 6 publisher Walter ... for the golden spiral gives math c values of math c phi frac 1 90 doteq 1.0053611 math if math ... in radians. Approximations of the golden spiral Image History of Gold. Rersum 2007.jpg right There are several similar spirals that approximate, but do not exactly equal, a golden spiral. ref cite ... JhnERQLm4lUC&dq rectangles approximate golden spiral ref These are often confused with the golden spiral. For example, a golden spiral can be approximated by a whirling rectangle diagram, in which the opposite .... The result is very similar to a true golden spiral See image on top right . Another approximation is a Fibonacci spiral , which is not a true logarithmic spiral. It is made up of a series of quarter ... spiral gets wider not by math &phi , but by a changing factor that equals the ratio of a term ... in nature Approximate logarithmic spiral s can occur in nature for example, the arms of spiral ... 2012 shells get wider in the pattern of a golden spiral, and hence are related to both math &phi and the Fibonacci series. In truth, nautilus shells and many mollusk shells exhibit logarithmic spiral ... more details
Image Triple Spiral Symbol.svg right thumb 200px A modern form of the triple spiral symbol Image Newgrange Entrance Stone.jpg right thumb 200px Triple spiral visible on entrance stone at Newgrange Image Triskel type Amfreville.svg right thumb 200px Triskel modelled after those of the Amfreville Gaulish helmet The triple spiral or Triskelion triskele is a Celt ic and Early history of Ireland pre Celtic .... Believed by many to be an ancient symbol of pre Celtic and Celtic beliefs, the triple spiral appears ... s of Insular art . The triple spiral was possibly the precursor to the later triskele design found ... to represent a variety of triplicities from their belief systems. The triple spiral is one of the main ... spiral came into common use to refer to the three realms. Also p. 134 On CRs Using Celtic symbols such as triskele ... also use the triple spiral symbol, most often to represent the concept of the Triple Goddess Neopaganism triple goddess . According to Uriel s Machine by Knight and Lomas 2003 the triple spiral may ... helical shape, which can be likened to a spiral, so that three spirals could represent nine months, providing an explanation for a link between fertility and the triple spiral symbol. center gallery Image Triple Spiral Symbol filled.svg Version with three thick single spirals. Image Triskele Symbol spiral five thirds turns.svg Spiral triskelion , occasionally used as a Christian Trinity Trinitarian symbol. Image Triskelion spiral threespoked inspiral.svg One decorative version of a wheeled form of the triple spiral symbol, sometimes considered a solar symbol Image Triskele hollow triangle.svg A spiral triskelion with a hollow triangle at its center File Triple espiral de Santa Tegra.jpg Auspicious ... Commons category Triple spiral Archimedean spiral Celtic art Passage tomb Three hares Triskelion References reflist External links http www.eschertile.com kids animate.htm Triple Spiral Animation by David Chow DEFAULTSORT Triple Spiral Category Celtic art Category Symbols Category Spirals Category Ornaments ... more details
Image Archimedean spiral.svg right thumb 300px Three 360 turnings of one arm of an Archimedean spiral The Archimedean spiral also known as the arithmetic spiral is a spiral named after the 3rd century ... a and b . Changing the parameter a will turn the spiral, while b controls the distance between successive turnings. Archimedes described such a spiral in his book On Spirals . Characteristics The Archimedean spiral has the property that any ray from the origin intersects successive turnings of the spiral ... s , hence the name arithmetic spiral . In contrast to this, in a logarithmic spiral these distances ... . The Archimedean spiral has two arms, one for &theta 0 and one for &theta ... distance between turns Some sources describe the Archimedean spiral as a spiral with a constant separation distance between successive turns. ref successive turnings of the Archimedean spiral have a constant ... spiral are measured along rays from the origin which do not cross the curve at right angles, whereas ... slightly different from the Archimedean spiral, the Involute Examples involute of a circle , whose turns ... spiral Sometimes the term Archimedean spiral is used for the more general group of spirals math r a b theta 1 x . math The normal Archimedean spiral occurs when x 1. Other spirals falling into this group include the hyperbolic spiral , Fermat s spiral , and the lituus mathematics lituus . Virtually all static spirals appearing in nature are logarithmic spiral s, not Archimedean ones. Many dynamic spirals such as the Parker spiral of the solar wind , or the pattern made by a Catherine ... proofs, makes use of an Archimedean spiral. Image Two moving spirals scroll pump.gif frame Mechanism of a scroll pump The Archimedean spiral has a variety of real world applications. Scroll compressor ... having coaxial spiral members accessdate 2006 11 25 author Sakata, Hirotsugu and Masayuki Okuda ... an Archimedean spiral is a way of quantifying human tremor this information helps in diagnosing neurological ... more details
Encyclopedia
top
