Infobox Anatomy Name PAGENAME Latin cavitas tympani GraySubject 230 GrayPage 1037 Image Gray923.png Caption The cochlea and vestibule, viewed from above. Tympanic cavity labeled at upper right. Image2 Caption2 Map Middle ear map MapPos Tympanic cavity MapCaption Bones and muscles in the tympanic cavity in the middle ear Precursor first branchial pouch pharyngeal pouch System Artery stylomastoid artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre c 16 DorlandsSuf 12220641 The tympanic cavity is a small cavity surrounding the ossicles bones of the middle ear . It is formed from the tubotympanic recess , an expansion of the first pharyngeal pouch embryology pharyngeal pouch . On its lateral surface, it abuts the external auditory meatus from which it is separated by the tympanic membrane eardrum . Clinical significance If damaged, the tympanic membrane can be repaired in a procedure called tympanoplasty . Should fluid accumulate within the middle ear as the result of infection or for some other reason, it can be drained by puncturing the tympanic membrane with a small bore needle tympanocentesis . Additional images gallery Image Gray907.png External and middle ear, opened from the front. Right side. Image Gray908.png Horizontal section through left ear upper half of section. gallery External links eMedicineDictionary Tympanic cavity http www.dartmouth.edu humananatomy figures chapter 44 44 5.HTM http www.thefreedictionary.com tympanic cavity http education.yahoo.com reference gray subjects subject 230 Auditory and vestibular systems anatomy stub Category Ear zh min nan K sek ca Caixa timp nica de Paukenh hle et Trummi s hr Bubnji te pl Jama b benkowa ru sl Bobni na votlina fi V likorvaontelo ... more details
Context date October 2009 The Cavity method is a mathematical method due to M. Mezard, Giorgio Parisi and Miguel Angel Virasoro in 1985 to solve some mean field type of models in statistical physics , specially adapted to disordered systems. It has been used to compute properties of ground state s in many condensed matter and optimization problem s. Initially invented to deal with the Sherrington Kirkpatrick model of spin glasses, it has shown wide applicability. It can be regarded as a generalization of the Bethe Peierls iterative method in tree like graphs to the case of graph with loops that are not too short. The different approximations that can be done with the cavity method are usually named after their equivalent with the different steps of the replica trick replica method which is mathematically more subtle and less intuitive than the cavity approach. The cavity method has played and is playing a major role in the solution of optimization problem s like the Boolean satisfiability problem K satisfiability and the graph coloring in present days. It has yielded not only ground states energy predictions in the average case, but also has inspired algorithmic methods for solving particular instances of an optimization problem . See also The cavity method has been created in the context of statistical physics and is closely related to other methods and algorithms in different fields of mathematics such as belief propagation . It has been created initially in the context of spin glasses as an alternative of the replica trick . References reflist The Cavity Method at Zero Temperature M. M zard,G. Parisi Journal of Statistical Physics, April 2003 The Bethe lattice spin glass revisited M. Mezard and Giorgio Parisi G. Parisi , September 14 2005 http arxiv.org abs cs.CC 0212002 Survey Propagation An Algorithm for Satisfiability A. Braunstein, M. M zard, R. Zecchina, Random Structures and Algorithms 27, 201 226 2005 . External links Category Condensed matter physics physics ... more details
Permanent cavity refers to the hole left by the passage of a projectile . It is measured as the volume of Tissue biology tissue or Ballistic gelatin ballistics gel that has been displaced by the passage of a bullet. See also Terminal ballistics Forensic ballistics Stopping power forensics stub Category Ballistics ... more details
A microwave cavity or Radio Frequency RF cavity is a special type of resonator , consisting of a closed ... in the cavity and the only losses are due to finite conductivity of cavity walls and Loss tangent dielectric losses of material filling the cavity. Every cavity has numerous resonant frequencies that correspond to electromagnetic field modes satisfying necessary boundary conditions on the walls of the cavity ... fields must be zero at cavity walls , it follows that cavity length must be an integer multiple ..., New York, NY, 1998. ref Hence, a resonant cavity can be thought of as a waveguide equivalent of short circuited half wavelength transmission line resonator. ref name pozar Q factor of a resonant cavity can be calculated using Cavity Perturbation Theory cavity perturbation theory and expressions for stored electric and magnetic energy. The electromagnetic fields in the cavity are excited via external coupling. An external power source is usually coupled to the cavity by a small aperture , a small ... edition, IEEE Press, New York, NY, 2001. ref External coupling structure has an effect on cavity performance ..., U.K., 1987. ref Quality factor The quality factor math Q math of a cavity can be decomposed into three ... dielectric material filling the cavity. NumBlk math Q d frac 1 tan delta , math EquationRef 4 math Q ext math , resulting from power loss through unclosed surfaces holes of the cavity geometry. Total Q factor of the cavity can be found as ref name pozar NumBlk math Q left frac 1 Q c frac 1 Q ... resistivity of the cavity walls, math mu r math and math epsilon r math are relative Permeability ... of the dielectric. Cavity Geometry Rectangular Cavity File Rectangular cavity.JPG thumb Rectangular cavity Resonance frequencies of a rectangular microwave cavity for any Transverse mode math TE ... Permeability electromagnetism permeability and permittivity respectively. Cylindrical Cavity File Cylindrical cavity.svg thumb Cylindrical cavity The field solutions of a cylindrical cavity ... more details
Infobox musical artist name Cavity image caption image size background group or band alias origin Miami, Florida , USA genre Sludge metal years active 1992 2003 label Hydra Head Records Hydra Head , ref http www.miaminewtimes.com 1999 05 13 music best metal band ref Rhetoric Records Rhetoric , Bacteria Sour , Man s Ruin Not sure if there was more or not associated acts Torche , Floor band Floor , Black Cobra band Black Cobra website current members Daniel Gorostiaga br Jason Landrian br Jorge Alvarez musician Jorge Alvarez br Rene Barge past members Raf Luna br Juan Montoya musician Juan Montoya br Steve Brooks Musician Steve Brooks br Anthony Vialon br Rene Barge br Ryan Weinstein br Jason Lederman br Beatriz Monteavaro BR Henry Wilson Cavity was an American sludge metal band from Miami, Florida . ref http www.metalunderground.com reviews details.cfm?releaseid 991 ref They formed in 1992 and broke up around 2003. ref http www.prefixmag.com reviews cavity laid insignificant 17973 http www.prefixmag.com reviews cavity laid insignificant 17973 ref Steve Brooks and Juan Montoya would go on to play in Torche and Floor band Floor . ref http www.redandblack.com 2008 10 23 metal band combines aggression psychedelia http www.redandblack.com 2008 10 23 metal band combines aggression psychedelia ref ref http www.smnnews.com 2008 03 27 torche steve brooks vocalsguitars http www.smnnews.com 2008 03 27 torche steve brooks vocalsguitars ref Henry Wilson and Beatriz Monteavaro also played in Floor band Floor . ref http www.stonerrock.com interviews index.asp?InterviewID 145 http www.stonerrock.com interviews index.asp?InterviewID 145 ref Discography ref http www.metal archives.com bands Cavity 31531 ref Human Abjection Full Length on City of Crime Records 1995 Scalpel 7 Single on City ... Length on Rhetoric Records 1997 Laid Insignificant EP on Bacteria Sour Ltd. 1998 Wounded EP 1998 Cavity ... year missing Cavity split with Daisycutter on Starcrunch Records 1997 Misc details Appeared on 403 ... more details
. The cavity magnetron is a high powered vacuum tube that generates microwave s using the interaction of a stream of electrons with a magnetic field. The resonant cavity magnetron variant of the earlier ... Bournemouth University accessdate 23 August 2009 ref The high power of pulses from the cavity magnetron ... objects. The compact cavity magnetron tube drastically reduced the size of radar sets ref name .... ref name tricks At present, cavity magnetrons are commonly used in microwave oven s and in various .... ref Construction and operation All cavity magnetrons consist of a hot cathode with a high continuous ... along their length and connect the common cavity space. These cavities act just like very highly ... frequency radio field in the cavity, which in turn causes the electrons to bunch into groups. The principle .... clear Image Resonant Cavity Magnetron Diagram.svg thumb right A cross sectional diagram of a cavity resonator resonant cavity magnetron. Magnetic lines of force are parallel to the geometric axis ... of the resonant cavity, and the applied magnetic field. In pulsed applications there is a delay ... field that is passed through a waveguide to the lighting cavity containing the light emitting .... The cavity version properly referred to as a resonant cavity magnetron proved to be far more useful. An early multi cavity version of the magnetron was reported by Bucharest University Professor Theodor V. Ionescu . and followed in 1937 1940 by a similar multi cavity magnetron built by the British ... University CHiDE HLF project by a similar multi cavity magnetron built by Prof. W. E. Burcham ref ... cavity resonant magnetron had been developed and patented in 1935 by Hans Hollmann in Berlin ... cavity magnetron Science museum.JPG thumb right Original Randall and Boot cavity magnetron In 1940 ... Boot produced a working prototype similar to Hollman s cavity magnetron, but added liquid cooling and a stronger cavity. Randall and Boot soon managed to increase its power output 100 fold. Instead ... more details
Miarolitic cavities or miarolitic texture are typically crystal lined irregular cavities or vug s most commonly found in Granite granitic pegmatite s, but also found in a variety of igneous rocks . The central portions of pegmatites are often miarolitic as the pegmatite Dike geology dike crystallizes from the outside walls toward the center. The Volatiles volatile portion of the magma is gradually excluded from the forming crystal phases until it becomes trapped within the body and forms the cavities which often contain mineral s of elements incompatible with the typical Silicate minerals silicate granitic mineralogy. The miarolitic cavities and miarolitic pegmatites are sources of rare and unusual minerals containing elements not found in abundance in normal igneous rocks. Minerals containing lithium, rubidium, beryllium, boron, niobium, tantalum, tin, bismuth, fluorine and other elements are found. The term miarolitic comes from the Italian language Italian miarole in reference to the mineral rich pegmatite region of Baveno and Cuasso al Monte in northern Italy. References http rruff.geo.arizona.edu doclib am vol71 AM71 396.pdf PDF London, David, Formation of tourmaline rich gem pockets in miarolitic pegmatites American Mineralogist, Volume 71, pages 396 405, 1986 http web.archive.org web 20091028021704 http geocities.com oklahomamgs London Pegmatite2.html London, David Miarolitic Pegmatites Category Mineralogy Category Petrology petrology stub ... more details
The Body may refer to Entertainment The Body short story The Body short story , a short story by Camillo Boito The Body novella The Body novella , a novel written by Stephen King The Body novel The Body novel , a novel by Richard Sapir The Body 1970 film The Body 1970 film , a documentary about the human anatomy The Body 2001 film The Body 2001 film , a film starring Antonio Banderas based on the book by Sapir The Body Buffy the Vampire Slayer The Body Buffy episode , the sixteenth episode of the fifth season of Buffy the Vampire Slayer People Marie McDonald , an American actress nicknamed The Body Elle Macpherson , an Australian supermodel nicknamed The Body Jesse Ventura , an American professional wrestler, actor, and politician nicknamed The Body See also Body disambiguation disambig de Body it The Body sv Body ... more details
Body to Body may refer to Body to Body album , a 1995 studio album by Blue System Body to Body, Job to Job , a 1991 compilation album by Swans Corps corps Body to Body film , 2003 French language film starring Emmanuelle Seigner and Philippe Torreton disambig ... more details
A body can refer to two different automobile platforms GM A platform , a midsize platform that was first rear wheel, then front wheel drive Chrysler A platform , a compact rear wheel drive platform disambig ... more details
Infobox single See Wikipedia WikiProject Songs Name BodyBody Cover Bodybody massari.jpg Artist Massari Album Forever Massari Released 2009 Recorded 2009 Genre R&B Pop music Pop Label Universal Records Canada Length 3 42 Writer Massari, Rupert Gayle Producer Derek Brin Last single Bad Girl Massari song Bad Girl br 2009 This single BodyBody br 2009 Next single Under the Radar br 2009 External music video YouTube aJ0sgK0uoAg BodyBodyBodyBody is Lebanese Canadian R&B Pop music Pop singer Massari s second single from his second studio album Forever Massari . Music video A music video directed by Marc Andr Debruyne was released on iTunes on the 10th of November 2009, featuring Massari and a group of girls in a Luxy night club in Woodbridge, Ontario. ref http www.luxyclub.ca ref Some scenes also show suggestive dancing by the girls in a disco atmosphere. Charts class wikitable sortable align left width 105 Chart 2009 ref http acharts.us song 52071 Acharts.us Massari s BodyBody ref align center Peak br position align left Canadian Hot 100 align center 81 References references Category Massari songs Category 2009 singles ... more details
Infobox album See Wikipedia WikiProject Albums Name B.O.D.Y. Type studio Artist Machel Montano Cover Machel Montano Band Of The Year.jpg Released 2006 Recorded 2005 , 2006 Genre Soca music Soca Length Label Producer Machel Montano Reviews Last album The Xtatik Experience br 2005 This album B.O.D.Y. br 2006 Next album Book of Angels br 2007 Misc B.O.D.Y. or Band Of De Year is an album released by popular Soca music Soca artist Machel Montano and his group Xtatik from Trinidad and Tobago in 2006 ref http www.machelmontanohd.com index.php?page music Machel Montano Discography at Official Website ref . The album features several solo and collaborative tracks, with popular artists such as United States American Doug E. Fresh , Jamaican s Mr Vegas & T.O.K. , Trinidadian s Patrice Roberts and Benjai . The title song Band Of De Year on the album won the 2006 Road March Competition for Trinidad and Tobago Carnival ref http www.tntisland.com rmhof.html Road March Hall of Fame ref . This was the second time Machel Montano won the competition, previously with Big Truck on the Heavy Duty Xtatik Heavy Duty album in 1997 . Track listing Scandal Delirious Band Of De Year small featuring Patrice Roberts small Dance With You small featuring Mr Vegas small La Vida Es En Carnival small remix of original from Celia Cruz small Amnesty small featuring Benjai small O Larki small featuring Andy Singh & Fabien Canning Downing small Madology King Kong Crew small featuring Kerwin du Bois small Scandal Delirious Remix Band Of De Year Road Mix Oh Girl small featuring Preston Andries small We Not Giving Up Remix small featuring Doug E. Fresh and T.O.K. small Heart of a Man small featuring Zan singer Zan small References reflist Machel Montano DEFAULTSORT Body Category Machel Montano albums Category Soca albums Category 2006 albums 2000s album stub ... more details
pump. A progressive cavity pump also can act as a motor when fluid is pumped through the interior. Applications include mud motor well drilling . Theory Image Progressive cavity pump rotor.png thumb right The helical rotor and the two universal joint s of the drive mechanism. Image Progressive cavity pump rubber stator.png thumb right A cutaway drawing of the rubber stator. Image Progressive cavity ... cavity pump consists of a helical rotor and a twin helix, twice the wavelength and double .... Citation needed date October 2009 Operation of Cavity Pumps In operation progressive cavity pumps ... , rapid deterioration of the stator can result. While progressive cavity pumps offer long life and reliable ... of Cavity Pumps Specific designs involve the rotor of the pump being made of a steel, coated in a smooth hard surface, normally chromium , with the body the stator made of a molded elastomer inside a metal tube body. The elastomer core of the stator forms the required complex cavities. The rotor ... dissertation laid the groundwork for the Progressing Cavity Pump. In 1932, Moineau partnered with Robert ... in Progressing Cavity Pumps Detailed pump development description http www.eurekamagazine.co.uk article 6473 Design progression for cavity pumps.aspx Eureka magazine article Magazine Entry Description for a Pump from Netzsch, http www.fao.org docrep 010 ah810e AH810E06.htm 6.2.2 Progressive Cavity Pumps A concise description of progressive cavity pump operation from the Food and Agriculture Organization DEFAULTSORT Progressive Cavity Pump Category Pumps de Exzenterschneckenpumpe es Bomba de ... more details
Cavity wall insulation is used to reduce heat loss through a cavity wall by filling the air space with a porous material. This immobilises the air within the cavity air is still the actual insulator , preventing convection , and can substantially reduce space heating costs. File Filled holes from installation of cavity wall insulation.jpeg thumb A wall that has had cavity wall insulation installed after construction , with refilled holes highlighted with arrows. During construction of new buildings, cavities are often filled with glass fibre wool or rock wool panels placed between the two leaves sides of the wall, but many other building insulation materials offer various advantages and many others are also widely used. For existing buildings that were not built with insulated cavities, a fibrous material such as cellulose insulation or glass wool is blown into the cavity through suitably drilled holes until it fills the entire wall space. Foam can also be used for this purpose. Although some foams used in the past, such as urea formaldehyde , are no longer used some people are allergic to this material, which is very difficult to remove once inside the wall , others, such as polyurethane , have taken their place. Cavity wall insulation also helps to prevent convection and keeps one s house warm by making sure that heat is not lost through walls, this also is a more cost efficient ... are widely available to help with the cost of cavity wall insulation. External links http www.insulation installers.co.uk cavity wall insulation how.htm How is Cavity Wall Insulation Installed? http www.insulation installers.co.uk cavity wall insulation types.htm Types of Cavity Wall Insulation http www.energywise.org.uk Free Cavity Wall and Loft Insulation Grants http www.ciga.co.uk Cavity ... Free Cavity Insulation Grants http www.ecosaveinsulation.co.uk Cavity Wall Insulation Scotland http www.exenergy.co.uk insulation Cavity Wall Insulation Wales Category Building insulation materials ... more details
Active cavity radiometer electrically self calibrating, cavity pyrheliometer used to measure solar constant total and spectral solar irradiance. See also Radiation References reflist R. C. Willson, Solar total irradiance observations by Active Cavity Radiometers , Solar Physics, 74, 217 229, DOI10.1007 BF00151292, 1981. External links Category Meteorological instrumentation and equipment Category Radiometry physics stub pl Aktywny radiometr wn kowy ... more details
Multiple issues unreferenced January 2007 orphan February 2009 confusing April 2007 The tie in a cavity wall is used to tie the internal and external walls or leafs constructed of bricks or cementatious Concrete masonry unit blocks together. It is placed in the cavity wall during construction and spans the cavity. The ends of the tie are designed to lock into the cement. Also incorporated into the design of the tie is means of preventing water transfer from the outer to the inner leafs. In flat ties this can be a twist. In wire ties this can be corrugations formed in the wire or again a twist. Cavitity walls often have insulation in the cavity which may either partially or fully fill the cavity. Partial fill insulation systems require specialized ties or clips to keep the isulation in position. A vapour barrier may be necessary on the inner wall to prevent intersticial condensation . This is often incorporated into the cavity wall insulation system. The spacing of ties is laid down in building regulations, though there may be variations with specialised blocks. Additional ties are used around window and door openings Improper installation may lead to water damage or fungus formation within the cavity, leading to structural and health hazards. Ties are exposed to water and chemical attack from cement . They were traditiionally made of galvanized steel, the fishtail tie being the most .... Any cracks appearing in cavity walls dating from the twentieth century need to be investigated before ... not satisfactory. Modern practice is to use stainless steel ties. Cavity walls were traditionally ... of longer ties are now available so than cavities of up to 6 150mm can be constructed. Cavity wall tie failure This is an increasing problem with cavity wall ties made from galvanised steel . It arises when the galvanising is not of sufficient quality and the outer leaf of the cavity wall allows water .... DEFAULTSORT Tie Cavity Wall Category Construction terminology ... more details
Cavity quantum electrodynamics cavity QED is the study of the interaction between light confined in a reflective cavity and atoms or other particles, under conditions where the quantum nature of light photon s is significant. It could in principle be used to construct a quantum computer . The case of a single 2 level atom in the cavity is mathematically described by the Jaynes Cummings model , and undergoes vacuum Rabi oscillation s math e rangle n 1 rangle leftrightarrow g rangle n rangle math , that is between an excited atom and n 1 photons, and a ground state atom and n photons. If the cavity is on resonance with the atomic transition, a half cycle of oscillation starting with no photons coherently swaps the atom qubit s state onto the cavity field s, math alpha g rangle beta e rangle 0 rangle leftrightarrow g rangle alpha 0 rangle beta 1 rangle math , and can be repeated to swap it back again this could be used as a single photon source starting with an excited atom , or as an interface between an atom or trapped ion quantum computer and optical quantum communication . Other interaction durations create Quantum entanglement entanglement between the atom and cavity field for example, a quarter cycle on resonance starting from math e rangle 0 rangle math gives the maximally entangled state a Bell state math e rangle 0 rangle g rangle 1 rangle sqrt 2 math . This can in principle be used as a quantum computer , mathematically equivalent to a trapped ion quantum computer with cavity ..., Berthold Georg Englert and Thomas Becker authorlink title Cavity quantum electrodynamics journal ... passing through cavity cite journal author R Miller, T E Northup, K M Birnbaum, A Boca, A D Boozer and H J Kimble authorlink title Trapped atoms in cavity QED coupling quantized light and matter journal ... and atomic inversion in cavity quantum electrodynamics journal J. Math. Phys. year 2010 volume ... bibcode 2010JMP....51g2103T Dirac potential, cavity QED Quantum computing Category Quantum information ... more details
Infobox Anatomy Name Jugular wall of tympanic cavity Latin paries jugularis cavi tympani GraySubject 230 GrayPage 1038 Image Gray913.png Caption Coronal section of right temporal bone . Image2 Gray914.png Caption2 The medial wall and part of the posterior and anterior walls of the right tympanic cavity , lateral view. Jugular wall labeled at bottom center. Precursor System Artery Vein Nerve Lymph MeshName MeshNumber The Jugular Wall or Floor is narrow, and consists of a thin plate of bone fundus tympani which separates the tympanic cavity from the jugular fossa. It presents, near the labyrinthic wall, a small aperture for the passage of the tympanic branch of the glossopharyngeal nerve. Gray s Auditory and vestibular anatomy Category Ear anatomy stub ... more details
Cavity ring down spectroscopy CRDS is a highly sensitive spectroscopy optical spectroscopic technique ... per trillion level. The technique is also known as cavity ring down laser absorption spectroscopy CRLAS . A typical CRDS setup consists of a laser that is used to illuminate a high finesse optical cavity ... with a cavity Normal mode mode , intensity physics intensity builds up in the cavity due to constructive ... decaying light intensity leaking from the cavity. During this decay, light is reflected ... on the order of a few kilometers. If something that absorbs light is placed in the cavity, the amount ... be used to calculate the concentration of the absorbing substance in the gas mixture in the cavity. Detailed description Cavity ring down spectroscopy is a form of laser absorption spectrometry . In CRDS, a laser pulse is trapped in a highly reflective typically R 99.9 optical cavity detection cavity ... and reflectivity losses. The intensity of light within the cavity is then determined as an exponential ... down time and is dependent on the loss mechanism s within the cavity. For an empty cavity, the decay ... math tau 0 frac n c cdot frac l 1 R X math where n is the index of refraction within the cavity, c is the speed of light in vacuum, l is the cavity length, R is the mirror reflectivity, and X takes ... close to zero, which is the case under cavity ring down conditions. Often, the miscellaneous losses are factored into an effective mirror loss for simplicity. An absorbing species in the cavity will increase losses according to the Beer Lambert law . Assuming the sample fills the entire cavity, math ... long distances. For example, a laser pulse making 500 round trips through a 1 meter cavity will effectively ... page 369 doi 10.1007 s00340 008 3320 z title Towards supercontinuum cavity ring down spectroscopy ... page 3673 doi 10.1364 OE.17.003673 title Cavity ring down absorption spectrography based on filament ... volume 11 date 2011 page 1620 doi 10.3390 s110201620 title PCF Based Cavity Enhanced Spectroscopic ... more details
Image Cavitysearchrecordslogo.png right thumb Logo of Cavity Search Records Cavity Search Records is a record label based in Portland, Oregon formed in 1992 in music 1992 by Christopher Cooper and Denny Swofford. Its roster includes such artists as The Helio Sequence , Hazel band Hazel and Pete Krebs , but is most notable for releasing Elliott Smith s debut album, Roman Candle album Roman Candle in 1994. Artists div col 3 Atomic 61 Danny Barnes Control Freak dirtclodfight Gentlemen of Leisure Gern Blanston see Steve Martin Fame Steve Martin Greg Gilmore Doghead Hazel band Hazel Heatmiser The Helio Sequence Wayne Horvitz King Black Acid Pete Krebs Steve Lacy Rattlecake Richmond Fontaine Satan s Pilgrims Mike Scheer Elliott Sharp Elliott Smith Trailer Queen div col end See also List of record labels External links http www.cavitysearchrecords.com Cavity Search Records Category Companies based in Portland, Oregon Category American independent record labels Category Record labels established in 1992 Category Indie music record labels Category Oregon record labels fr Cavity Search Records nn Cavity Search Records ... more details
According to the Bragg Gray cavity theory , the ionization produced within a gas filled cavity inside a medium is related to the energy absorbed in that surrounding medium. If the cavity is small enough that it does not change the number or distribution of the electron s that would exist in the medium in the absence of the cavity, and the energy is deposited only by electrons passing through the gas filled cavity, then math E nu J nu cdot W cdot rho math where br math E nu math is the energy absorbed per unit volume of the medium math J nu math is the ionization per unit volume produced in the gas math W math is the average energy lost by the secondary electrons per pair of ions formed in the gas math rho math is the ratio of the stopping power of the medium and the gas for the secondary electrons References Khan, F. M. 2003 . The physics of radiation therapy 3rd ed. . Lippincott Williams & Wilkins Philadelphia. ISBN 978 0 7817 3065 5. Louis Harold Gray Gray, L. H. 1936 . An ionization method for the absolute measurement of math gamma math ray energy. Proceedings of the Royal Society A , 156 , pp. 578&ndash 596 See also Louis Harold Gray Category Physics theorems physics stub fr Th orie de Bragg Gray ... more details
Context date April 2011 Resonator Cavity perturbation theory describes methods for derivation of perturbation formula e for performance changes of a cavity resonator. These performance changes are assumed to be caused by either introduction of a small foreign object into the cavity or a small deformation of its boundary. General theory When a resonant cavity is perturbed, i.e. when a foreign object with distinct material properties is introduced into the cavity or when a general shape of the cavity is changed, electromagnetic fields inside the cavity change accordingly. The underlying assumption of cavity perturbation theory is that electromagnetic fields inside the cavity after the change differ ... perturbation File Cavity material perturbation.JPG thumb center upright 3 Cavity material perturbation When a material within a cavity is changed permittivity and or Permeability electromagnetism ... of the perturbed cavity, math omega 0 math is the resonant frequency of the original cavity, math ... 2 where W is the total energy stored in the original cavity and math bar w e math and math bar ... fields magnetic energy densities respectively. Shape perturbation File Cavity shape perturbation.JPG thumb center upright 3 Cavity shape perturbation When a general shape of a resonant cavity ... w e cdot Delta V W , math EquationRef 5 Applications Microwave measurement techniques based on cavity ... . Cavity perturbation measurement techniques for material characterization are used in many ..., D.H. Prajapati, A.N. , Cavity perturbation technique for complex permittivity measurement of dielectric ... with Improved Microwave Cavity Perturbation Technique, Microwave Conference, 2008. EuMC 2008. 38th ... Fan Weilian Wang , Measuring glucose concentration by microwave cavity perturbation and DSP technology ... , Measurement of Complex Permeability of Ferromagnetic Nanowires using Cavity Perturbation Techniques ... 1489, May 2006 ref ref Wang, Z.H. Javadi, H.H.S. Epstein, A.J. , Application of microwave cavity perturbation ... more details
Infobox Anatomy Name Membranous wall of tympanic cavity Latin paries membranaceus cavi tympani GraySubject 230 GrayPage 1038 Image Gray913.png Caption Coronal section of right temporal bone . Image2 Gray914.png Caption2 The medial wall and part of the posterior and anterior walls of the right tympanic cavity , lateral view. Precursor System Artery Vein Nerve ref Lymph MeshName MeshNumber The Membranous wall of tympanic cavity , also called the Lateral Wall outer wall , is formed mainly by the tympanic membrane, partly by the ring of bone into which this membrane is inserted. This ring of bone is incomplete at its upper part, forming a notch notch of Rivinus , close to which are three small apertures the iter chord posterius, the petrotympanic fissure, and the iter chord anterius. The iter chord posterius apertura tympanica canaliculi chord is situated in the angle of junction between the mastoid and membranous wall of the tympanic cavity immediately behind the tympanic membrane and on a level with the upper end of the manubrium of the malleus it leads into a minute canal, which descends in front of the canal for the facial nerve, and ends in that canal near the stylo mastoid foramen. Through it the chorda tympani nerve enters the tympanic cavity. The petrotympanic fissure fissura petrotympanica Glaserian fissure opens just above and in front of the ring of bone into which the tympanic membrane is inserted in this situation it is a mere slit about 2 mm. in length. It lodges the anterior process and anterior ligament of the malleus, and gives passage to the anterior tympanic branch of the internal maxillary artery. The iter chord anterius canal of Huguier is placed at the medial end of the petrotympanic fissure through it the chorda tympani nerve leaves the tympanic cavity. The blood supply to tympanic memberane lateral part is through the deep auricular branch of the maxillary artery. It is by a vascular ring formed by a small peripheral vessel from above and a much ... more details
Infobox Anatomy Name Promontory of tympanic cavity Latin promontorium tympani GraySubject 230 GrayPage 1042 Image Gray911.png Caption View of the inner wall of the tympanum. Promontory visible near center. Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre p 36 DorlandsSuf 12669937 The promontory of the tympanic cavity , better known as the cochlear promontory is a rounded hollow prominence, formed by the projection outward of the first turn of the cochlea . It is placed between the Fenestra anatomy fenestrae , and is furrowed on its surface by small grooves, for the lodgement of branches of the tympanic plexus . A minute spicule of bone frequently connects the promontory to the pyramidal eminence . Additional images gallery Image Gray913.png Coronal section of right temporal bone. Image Gray914.png The medial wall and part of the posterior and anterior walls of the right tympanic cavity, lateral view. gallery External links NormanAnatomy lesson3 Gray s Auditory and vestibular anatomy Category Ear Musculoskeletal stub fr Promontoire oreille moyenne ... more details
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