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Topic: Torsion

Related Topics

Unit tangent vector

Torsion bar

Connection form

Sectional curvature

Tensor

Endomorphism

Ricci curvature tensor

Cross product

Shear stress

Einstein manifold

Tangent bundle

Stress (physics)

Local coordinates

Torque

Bolted joint

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	Torsion - Wikipedia, the free encyclopedia
		Torsion free connections are considered most frequently - the Levi-Civita connection is assumed to have zero torsion, for instance.
		Some topological invariants are called torsions: for example the Reidemeister-Schreier torsion of a group acting on a finite complex; and also the analytic torsion defined using Laplacians.
		Torsion is also sometimes used for the medical condition commonly known as bloat.
	en.wikipedia.org /wiki/Torsion (401 words)

	Torsion beam suspension - Wikipedia, the free encyclopedia
		Torsion beam suspension, also known as a torsion bar or torsion spring, is a vehicle suspension system.
		One end of a long metal bar is attached firmly to the vehicle chassis; the opposite end has a lever, perpendicular to the bar, that is attached to the axle of a wheel.
		Some vehicles use torsion bars to implement automatic leveling with sensors and motors to dynamically adjust the torsion in each bar in response to changing loads and road conditions.
	en.wikipedia.org /wiki/Torsion_bar (332 words)

	Ovarian Torsion (Site not responding. Last check: 2007-10-07)
		Adnexal torsion is the fifth most common gynecologic surgical emergency, with a prevalence of approximately 3% (1).
		Torsion of the ovarian pedicle compromises lymphatic and venous drainage leading to congestion and edema, loss of arterial perfusion, and infarction.
		Continued flow despite torsion may be due to venous thrombosis causing symptoms prior to arterial occlusion, or due to its dual blood supply from the ovarian artery and the ovarian branches of the uterine artery.
	cats.med.uvm.edu /cats_teachingmod/radiology/radiology_html/teaching/radio_adult/ovarian_torsion/ovarian_torsion_1.html (615 words)

	Tibial Torsion - Children's Hospital of Philadelphia
		Tibial torsion is an inward twisting of the shin bones (the bones that are located between the knee and the ankle).
		Tibial torsion causes the child's feet to turn inward, or have what is also known as a "pigeon-toed" appearance.
		The diagnosis of tibial torsion is made by a physical examination by your child's physician.
	www.chop.edu /consumer/your_child/condition_section_index.jsp?id=-8678 (395 words)

	Torsion Stages (Site not responding. Last check: 2007-10-07)
		Torsion is most readily understood looking at the body plan of an evolutionarily "primitive" mollusc, Neopilina galatheae (a Monoplacophore).
		Torsion begins in stages 2 and 3, with a partial rotation of the gut.
		Torsion is believed to be driven by an evolutionary adaptation that permitted the mollusc to more efficiently pull into its shell for protection.
	nighthawk.tricity.wsu.edu /museum/ArcherdShellCollection/Illustrations/TorsionStages.html (277 words)

	eMedicine - Testicular Torsion : Article by Eugene Minevich, MD (Site not responding. Last check: 2007-10-07)
		Synonyms and related keywords: intravaginal testicular torsion, extravaginal testicular torsion, torsion of the spermatic cord, torsion of the testis, epididymitis, orchitis, epididymo-orchitis, pyuria, bacteriuria, leucocytosis, contralateral orchidopexy, orchiectomy, testicular necrosis, testicular atrophy, scrotal swelling, intermittent testicular torsion, acute scrotum, bell-clapper deformity
		Torsion of the testis, or more correctly, torsion of the spermatic cord, is a surgical emergency because it causes strangulation of gonadal blood supply with subsequent testicular necrosis and atrophy.
		Extravaginal torsion comprises approximately 5% of all torsions.
	www.emedicine.com /med/topic2780.htm (2099 words)

	QDS Henschen Torsion Spring FAQs
		Torsion springs can be used in many applications where coil springs are currently being used.
		Torsion springs can be welded or bolted into a frame or an assembly.
		Torsion springs are ideal for absorbing shock and vibration in such applications as PTO drive lines, motor mounts, bulk handling conveyor cleaners, overhanging booms, wheels and many other similar products.
	www.orderdesk2000.com /subwebs/henschen-axle/torsion-spring-faqs.htm (230 words)

	Torsion
		Torsion on a member will result in the cross section rotating a given amount.
		For a given shape, the pure torsional shear stress is greatest in the thickest element.
		The torsional stresses are all a function of the rotational displacement function f and its various derivatives.
	www.archoneng.com /tptasm.html (1609 words)

	Article : Imaging Signs- Gray Scale Sonographic Markers in Intravaginal Torsion Testis ; Author : S Ganesan ; ... (Site not responding. Last check: 2007-10-07)
		Torsion testis, a misnomer referring to twisting of the spermatic cord is a surgical emergency, since it results in compromise of vascular supply to the extremely sensitive gonadal tissue.
		Torsion testis is basically of two types; Extravaginal torsion, presenting in neonatal period and intravaginal torsion occurring in older children within the tunica vaginalis.
		Intravaginal torsion is related to an anomalous testicular suspension, which tends to be bilateral in many instances, approaching as high as 40% in certain series.
	www.ijri.org /articles/archives/2002-12-3/genitourinary_363.htm (718 words)

	Toyota Tech: Upgrading Torsion Bars
		The torsion bars can be adjusted to level out the ride, but this action just postpones the inevitable: the stock bars should be replaced with something that can support the use.
		According to Burroughs, the "torsion bars are under high torsional stresses and these stresses are at a maximum at the surface of the minor diameter.
		Prior to installing the new torsion bars, make sure you know which bar is to be installed on the driver side, and which one fits the passenger side: this will be indicated on one end of each bar.
	www.4x4wire.com /toyota/tech/torsion_bars (1965 words)

	Torsion Spring Calculator and Formula - Engineers Edge (Site not responding. Last check: 2007-10-07)
		As load is applied to a torsion spring, the springs diameter will decrease, reducing the outside and inside diameters.
		In most cases is it wise to design for a torsion spring to wind in the direction of the coil winding.
		Should design require that the torsion spring wind in the unwinding direction, maximum load should be and degrees of wind should be lowered.
	www.engineersedge.com /spring_torsion_calc.htm (156 words)

	Bell Clapper Deformity of Scrotum (Site not responding. Last check: 2007-10-07)
		Failure of normal posterior anchoring of the gubernaculum, epididymis and testis is called a bell clapper deformity because it leaves the testis free to swing and rotate within the tunica vaginalis of the scrotum much like the gong (clapper) inside of a bell.
		It is not clear why spermatic cord torsion, caused by the congenital bell clapper deformity, often occurs years after development is complete.
		The testis and scrotum are swollen, tender and erythematous.
	www.meddean.luc.edu /lumen/MedEd/urology/bellclap.htm (352 words)

	Genitourinary and Kidney Disorders - Testicular Torsion (Site not responding. Last check: 2007-10-07)
		Testicular torsion is a twisting of the testicles and the spermatic cord (the structure extending from the groin to the testes that contains nerves, ducts, and blood vessels).
		In pre-adolescent and adolescent boys, torsion occurs primarily from incomplete attachment of the testes within the scrotum.
		Testicular torsion detected in the fetus results when development of the protective sac that surrounds the testicles within the scrotum does not attach to the scrotum internally.
	www.musckids.com /health_library/urology/testor.htm (381 words)

	Fallopian Tube Torsion: Laparoscopic Evaluation and Treatment of a Rare Gynecological Entity (Site not responding. Last check: 2007-10-07)
		Torsion is unlikely with an intact tube and is more often the result of an ovarian cyst or tumor.
		It is noteworthy that in 12% of these cases, the diagnosis of fallopian tube torsion was made during a normal intrauterine pregnancy.
		Torsion of the normal uterine adnexa in childhood: case report.
	www.familypractice.com /journal/2001/v14.n04/1404.06/1404.06.htm (1504 words)

	PlanetMath: torsion (space curve) (Site not responding. Last check: 2007-10-07)
		called the torsion of the curve, a quantity that is invariant with respect to reparameterization.
		This is version 3 of torsion (space curve), born on 2002-02-02, modified 2004-01-22.
		Object id is 1634, canonical name is Torsion.
	planetmath.org /encyclopedia/Torsion4.html (202 words)

	eMedicine - Ovarian Torsion : Article by Lori Sargeant, MD (Site not responding. Last check: 2007-10-07)
		Torsion may occur in normal adnexa because of spasm of the adnexal structure or hemodynamic changes of the mesosalpinx (ie, the veins become tortuous and congested, allowing them to twist).
		Torsion also is related to disease of the tube or the ovary, which may result from a tumor, trauma, or postsurgery.
		Torsion has been reported to cause acute abdominal pain in girls aged 3-19 years, with a mean age of 13 years.
	www.emedicine.com /EMERG/topic353.htm (1854 words)

	RealmGothica - Featured - Torsion (Site not responding. Last check: 2007-10-07)
		Torsion has sounds that electrify and give a shiver of delight.
		Torsion originated in a time of despair for its two founding members.
		It was not until the summer of 1999 that Jef graced the stage as Torsion's live guitarist.
	www.realmgothica.com /RealmGothica/pages/rg_featured_musicians_torsion.shtml (1314 words)

	Understanding Bloat and Torsion ( Gastric Dialation Volvulus - GDV )
		Torsion is the abnormal positioning of the stomach which is caused by the stomach's rotation about its axis, i.e.
		Chronic gastric volvulus (ongoing mild torsion) may not cause typical signs of GDV, but should be suspected in dogs with intermittent vomiting, weight loss, mild bloating, rumbling sounds in the bowel (borborygmi) and/or belching.
		Severe torsion can tear the short branches of the artery between the spleen and the stomach, thus increasing the potential for necrosis (death of cells) of the stomach wall.
	www.kifka.com /Elektrik/Bloat.htm (2957 words)

	Child Health Library - Genitourinary and Kidney Disorders - Testicular Torsion
		The torsion causes decreased blood flow to the testes, essentially strangling them of oxygen and nutrients.
		Testicular torsion is usually diagnosed with a physical examination and a complete medical history.
		It is imperative to make a prompt diagnosis because prolonged testicular torsion may cause irreversible damage to the testes.
	www.chp.edu /greystone/urology/testor.php (392 words)

	Now Come Torsion Fields
		Torsion fields have been studied by several groups of Russian scientists for at least three decades and most of that time in secret.
		Torsion fields can be generated, detected, switched on and off (such as for communication purposes), and are a distinct type of energy field heretofore not included in today's classical physics.
		Torsion fields can interact with laser beams (change frequency); affect biological processes; are generated by melting or solidifying some materials; affect quartz crystals; affect some electronic components; can favorably change some beverages; and have been noted to affect gravity.
	www.padrak.com /ine/NEN_5_11_2.html (875 words)

	Testicular Torsion
		Torsion is a twisting of the spermatic cord upon itself that results in obstruction of the blood vessels supplying the testis and epididymis.
		Torsion is more common in children, but accounts for 20% of acute scrotal pathology in post-pubertal males.
		Testicular torsion and acute epididymitis or epididymo-orchitis are the most common causes of an acute scrotal pain.
	brighamrad.harvard.edu /Cases/bwh/hcache/125/full.html (451 words)

	Torsion Bars Explained
		The torsion bar, like the conventional lief or coil spring is at one end fastened to the frame so as not to move during operation.
		To adjust the ride height of the vehicle by winding the adjuster bolt at the fixed [frame] end of the torsion bar does not add any more force [weight] to the pivot [control arm] end of the torsion bar, therefore the pre load is unaffected, hence ride quality and torsion bar life theoretically remain unchanged.
		Winding the torsion bar adjuster bolt is the same as installing blocks between the axle and lief springs or a set of coil spacers, it simply moves the spring to a different position.
	www.toyotaoffroad.com /articles/Information/torsion_bars.htm (636 words)

	Testicular torsion
		Testicular torsion usually only appears in young boys and is most common in their teenage years but is also sometimes seen in men up to the age of 30 or on rare occasions older men.
		The testicles are nourished by the blood vessels, which together with the nerves and the sperm channels pass through the spermatic cord from the abdominal cavity to the scrotum.
		The torsion that has tightened the blood vessels is removed and the failed blood circulation to the testicles is brought back to normal.
	www.netdoctor.co.uk /diseases/facts/testiculartorsion.htm (322 words)

	Torsion-Bar Tech
		To understand how a torsion spring works, imagine your chest is the crossmember, your left arm is the torsion bar, and your hand is stuck in the lower A-arm.
		But because the torsion bar is anchored at the other end in the crossmember (just as your arm is anchored in your shoulder) the torsion bar will exert a counterclockwise force to push the A-arm down and hold the truck up.
		Torsion bars have been popular with the OEMs that offer IFS 4x4s because they keep the truck's center of gravity low, leave room for big CV-shafts, and offer the lowest potential unsprung weight of any suspension design.
	www.4wheeloffroad.com /techarticles/131_0306_TORS (819 words)

	Structural engineering other topics - torsion in concrete beams.
		If you are considering that the slab/diaphragm offers resistance to torsion in beams, then you should check that wether that slab can resist that much amount of additional moment (that is being transferred to it because of torsion).
		Since torsional failure is sudden and non-ductile, you should always check it and confirm adequate strength in the primary member.
		the torsion in the beam is caused by the slab, and the beam
	www.eng-tips.com /viewthread.cfm?qid=2983 (1402 words)

	Testicular Torsion - Children's Hospital of Philadelphia
		The torsion causes decreased blood flow to the testes, essentially depriving them of oxygen and nutrients.
		Testicular torsion in fetuses occurs when the protective sac that surrounds the testicles within the scrotum does not attach internally to the scrotum.
		Testicular torsion should be diagnosed promptly, because if it's prolonged, it can cause irreversible damage to the testes.
	www.chop.edu /consumer/your_child/condition_section_index.jsp?root_id=-9162&id=-9174 (410 words)

	Testicular torsion (Site not responding. Last check: 2007-10-07)
		This is because the non-affected testicle is at risk of testicular torsion in the future.
		After 6 hours of torsion (impaired blood flow), the likelihood that the testicle will need to be removed increases.
		If the blood supply is cut off to the testicle for a prolonged period of time, it may atrophy (shrink) and need to be surgically removed.
	www.humed.com /humc_ency/ency/article/000517trt.htm (273 words)

	Torsion Operating System - Trac (Site not responding. Last check: 2007-10-07)
		Torsion is a single address space multitasking operating system with transparent data persistence.
		What this means is that you can write a value to anywhere in memory, perform a checkpoint, trip over the power cable, and then on the next boot that value will still be exactly where you set it in memory.
		Torsion 0.0.18, released December 6, 2004, is now available.
	www.torsion.org (230 words)

	FM: Torsion Scale Space Images (Site not responding. Last check: 2007-10-07)
		A Torsion Scale Space image is a multi-scale organization of the torsion zero-crossing points of a space curve (or 3-D contour) as it evolves.
		Intuitively, torsion is a local measure of how non-planar a space curve is. Contour evolution (or smoothing) is achieved by first parametrizing using arc-length.
		As a result, torsion zero-crossing points can be recovered and mapped to the TSS image in which the horizontal axis represents the arc-length parameter on the original contour, and the vertical axis represents the standard deviation of the Gaussian filter.
	www.ee.surrey.ac.uk /Research/VSSP/demos/tss (308 words)

	Henschen Rubber Torsion Axles
		torsion axle utilizes the natural cushioning of rubber cords (a specially compounded blend of natural and synthetic rubber) and their self-dampening characteristics to make the Henschen Axle System perfectly suited for any type of loading requirements.
		The inner torsion shaft of each wheel is isolated and cushioned from the frame and axle tube by the rubber cords.
		The rubber attempts to return to its original shape, but it can't because once inserted, it is restricted by the inner torsion bar ("innermetal") and the outer axle tube.
	www.orderdesk2000.com /subwebs/henschen-axle/rubber-torsion-axles.htm (226 words)

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