The oldest one, the Rotators, was founded in Toronto in 1962 by men who worked as railway porters.
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Gluons, the eight particles that convey the strong force, can be thought of as the rotators of the triangles.
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The country's oldest gay curling league, Rotators, was started in Toronto in 1962 and went publicly gay six years later.
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"They were the flight attendants of the railway," said Murray Leaning, the president of Rotators and Riverdale, the nation's largest gay curling league, comprising 56 teams.
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Stretching your IT band can help, but McLaughlin says it's more important to stretch all the muscles surrounding it, like your quadriceps, hamstrings, hip flexors, and hip rotators.
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Its long period is close to that of slow rotators.
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Most asteroids have a shorter rotation period between 2 and 20 hours (also see List of slow rotators).
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While the slowest rotators have periods above 1000 hours, the vast majority of asteroids have periods between 2.2 and 20 hours.
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While the slowest rotators have periods above 1000 hours, the vast majority of asteroids have periods between 2.2 and 20 hours.
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While the slowest rotators have periods above 1000 hours, the vast majority of asteroids have a much shorter rotation period of 2.2 to 20 hours.
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Potentially slow rotators have their rotation period estimated based on a fragmentary light curve. They are listed separately from the more reliable results above, that have a quality code (U) of 2 or higher. The periods for potentially slow rotators may be completely wrong (U=1), have no complete and conclusive result (U=n.a.), a large error margins of more than 30% (U=2−), or anything in between.
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Muscles that attach to and depress the scapulae include the lower trapezius muscle and the pectoralis minor. The pec minor also works in conjunction with the rhomboid muscle and levator scapulae to perform downward rotation of the scapulae. Muscles which attach to the scapulae that adduct and extend the arm include the posterior deltoid muscles, the teres major, and minor stabilizing contribution from some rotator cuff muscles (infraspinatus and teres minor as lateral rotators, subscapularis as medial rotators).
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Rotators are commonly used in amateur radio and military communications installations. They are also used with TV and FM antennas, where stations are available from multiple directions, as the cost of a rotator is often significantly less than that of installing a second antenna to receive stations from multiple directions. Rotators are manufactured for different sizes of antennas and installations. For example, a consumer TV antenna rotator has enough torque to turn a TV/FM or small ham antenna.
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Gobo rotators are metal frames designed to hold a gobo. They have a much larger cross-section (thicker) than a regular gobo holder due to the motors and gearing required to facilitate rotation. Because of their increased thickness, gobo rotators are not placed inside fixture through the specifically designed opening (the gobo slot) but instead install into the accessory (iris) slot. Installing the rotator in the accessory slot still places te pattern inside the focal plane of a fixture, allowing adjustments to the image (creating hard or soft edges).
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The posterior (Moore or Southern) approach accesses the joint and capsule through the back, taking piriformis muscle and the short external rotators of the femur. This approach gives excellent access to the acetabulum and femur and preserves the hip abductors and thus minimizes the risk of abductor dysfunction post operatively. It has the advantage of becoming a more extensile approach if needed. Critics cite a higher dislocation rate, although repair of the capsule, piriformis and the short external rotators along with use of modern large diameter head balls reduces this risk.
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The posterior fibers assist the latissimus dorsi to extend the shoulder. Other transverse extensors, the infraspinatus and teres minor, also work in tandem with the posterior deltoid as external (lateral) rotators, antagonists to strong internal rotators like the pecs and lats. An important function of the deltoid in humans is preventing the dislocation of the humeral head when a person carries heavy loads. The function of abduction also means that it would help keep carried objects a safer distance away from the thighs to avoid hitting them, as during a farmer's walk.
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IINieto, J.-L. et al. (1988), More isotropic oblate rotators in elliptical galaxiesGraham, A.W. et al. (2016), Disky Elliptical Galaxies and the Allegedly Over-massive Black Hole in the Compact “ES“ Galaxy NGC 1271 (see their Fig.7).
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Reliability and validity of shoulder tightness measurement in patients with stiff shoulders. Manual Therapy. 2006; 11 (146-52). Hence, restricted external rotation can encourage adaptive shortening and thickening of the internal rotators of the shoulder principally the teres major and subscapularis.
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The piriformis muscle is part of the lateral rotators of the hip, along with the quadratus femoris, gemellus inferior, gemellus superior, obturator externus, and obturator internus. The piriformis laterally rotates the femur with hip extension and abducts the femur with hip flexion. Abduction of the flexed thigh is important in the action of walking because it shifts the body weight to the opposite side of the foot being lifted, which prevents falling. The action of the lateral rotators can be understood by crossing the legs to rest an ankle on the knee of the other leg.
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Antagonists to this function (upward rotators of the scapulae) are the serratus anterior and lower fibers of the trapezius. If the lower fibers are inactive, the serratus anterior and upper trapezius work in tandem with rhomboids and levators to elevate the entire scapula.
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In a 1968 report to Crown, the Booz-Allen consulting firm predicted an end to the market for antenna rotators. They sold steadily for three more decades. Crown stopped producing them in October 2000. but the transition to the lift truck business was under way.
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A rotational lightcurve of Educatio, obtained from photometric observations, gave a rotation period of 1561 hours with a high brightness amplitude of 0.80 magnitude (), indicative of a non-spherical shape. It belongs to the small group of slow rotators with a period above 1000 hours.
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The types of CVTs which are able to function as IVTs include epicyclic, friction-disk and ratcheting CVTs. In an epicyclic CVT, the infinitely low drive ratios are produced when the output shaft rotation speed which is equal to the difference between two other speeds within the CVT. In this situation, the CVT is functioning as a regulator of the rotation speed of any one of the three rotators of the planetary gear system. Since two of the rotators are the input and output of the regulator, the CVT can be configured to result in an output speed of zero for any given input speed.
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A rotational lightcurve of was obtained from photometric observations by the LaSilla–Quest Variability Survey at La Silla in Chile. Lightcurve analysis gave a rotation period of 263.8 hours with a brightness amplitude of 0.14 magnitude (). It belongs to the Top 200 slowest rotators known to exist.
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In October 2009, a rotational lightcurve was obtained from photometric observations by Brian Warner at the Palmer Divide Station in Colorado. Lightcurve analysis gave a rotation period of hours with a brightness variation of 0.50 magnitude (). Durda belongs to the Top 100 slow rotators known to exists.
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912 Maritima is an asteroid in the asteroid belt. Based on lightcurve studies observing Maritima over a three-month period, Maritima has a rotation period of 1332 hours. Analysis reveals a possible synodic period of . Superslow rotators, those with periods longer than a few days, are generally small asteroids.
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The siren can be heard from several miles away on a clear day. Unfortunately, the siren's size can prove troublesome, as it can be knocked down by strong winds. Also, the chain-driven rotators were prone to occasional breakdowns, usually leading to the failure, removal or outright replacement of the ACA 125.
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In February 2013, a rotational lightcurve of Thessandrus was obtained from photometric observations by American astronomer Robert Stephens at the Center for Solar System Studies in California. It gave an exceptionally long rotation period of hours with a brightness variation of 0.60 in magnitude (). It belongs to the slowest rotators known to exist.
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The ACOP deals specifically with a forklift operator using only the standard forks. Forklift attachments, such as barrel clamps, fork extensions, rotators and personnel cages are covered under a separate unit standard (US10852). It is not mandatory to achieve a unit standard; a company can simply induct the operator on the attachments used.
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Based on its exceptionally low brightness variation, Franklina might be a rather spherical body with little to no albedo features on its surface, or, it might be due to a yet undetermined long period. Typically, a collaboration of astronomers taking photometric measurements around the globe is required to measures the period of such slow rotators.
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Broadband prismatic polarization rotatorF. J. Duarte, Optical device for rotating the polarization of a light beam, US Patent 4822150 (18th of April, 1989). Prism rotators use multiple internal reflections to produce beams with rotated polarization. Because they are based on total internal reflection, they are broadband—they work over a broad range of wavelengths.
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Holmes Traffic King Wrekcer service body on 133 inch wheelbase Nash Truck in 1948. Miller Industries manufactures and sells a variety of wreckers. It also produces car carriers and rotators via a number of different brands. Many of the brands are operated as part of Miller Industries' primary subsidiary, Miller Industries Towing Equipment, Inc.
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Crown later decided to stop making so many one-of-a-kind trucks and developed two lines of E-Z Lift Trucks: an H series (hand-operated) and a B series (battery-operated). In 1959, when its lift trucks had annual sales of about $50,000, antenna rotators had annual sales of $700,000,Bidwell, quoted on p. 71, By Design.
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Crown stopped manufacturing the rotators in late 2000. Crown hired Deane Richardson and David B. Smith , of RichardsonSmith, to design a medium-duty hand-controlled pallet truck, which went on the market in 1962. That pallet truck won a design excellence award from the American Iron and Steel Institute in 1965. Good design became part of Crown’s corporate strategy.
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American astronomer Richard Binzel obtained the first rotational lightcurve of Rosseland in the early 1980s. It gave a rotation period of 69.2 hours with a brightness variation of 0.13 magnitude (). During a survey of presumed slow rotators, photometric observations by Brazilian Cláudia Angeli and colleges gave a period of 69.2 hours and an amplitude of 0.45 magnitude ().
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Photometric and spectral variability of GR Andromedae is typical of a star with a strong and variable magnetic field. This way, the 518.2 days periodicity can be identified as the rotation period of the star. It's among the slowest rotators in the category of magnetic chemically peculiar stars, with a calculated equatorial rotation rate of only .
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In August 2010, a rotational lightcurve of Los Molinos was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of hours with a brightness amplitude of 0.33 magnitude (). This makes Los Molinos one of the top 200 slow rotators known to exist.
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This plot shows the distribution of rotation periods for 15,000 minor planets, plotted against their diameters. Most bodies have a period between 2 and 20 hours. This is a list of fast rotators--minor planets that have an exceptionally short rotation period, also called "rotation rate" or "spin rate". It is a fundamental standard physical property for minor planets.
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In July 2007, a rotational lightcurve of Jarvis was obtained from photometric observations by astronomer Brian Warner at his Palmer Divide Station, Colorado, in collaboration with Robert Stephens, Alan Harris and Petr Pravec. The re-examined lightcurve analysis gave a rotation period of 202 hours with a brightness amplitude of 0.50 in magnitude, superseding the original period solution of 40.8 hours (). Due to an improved long-term calibration of the obtained photometric data points, a much longer period of 202 hours has been derived for Jarvis, which is now among the Top 300 slowest rotators known to exist, as most minor planets have spin rates between 2.2 and 24 hours only. The observations also suggest that Jarvis might be a tumbling asteroid in a non-principal axis rotation, which are typically slow rotators ().
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In many applications it is possible to use a quarter-wave plate to produce circularly polarized light, but this is only possible for light of a limited range of wavelengths which is linearly polarized to start with. Other methods have been demonstrated, such as the use of Faraday rotators and liquid crystals. It is also possible to depolarize light using fiber optics.
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In August 2012, a rotational lightcurve of David Hughes was obtained from photometric observations by Italian amateur astronomers Roberto Crippa and Federico Manzini at the Sozzago Astronomical Station . Lightcurve analysis gave a rotation period of at least 24 hours with a brightness amplitude of 0.25 magnitude (). Most asteroids have a period shorter than 20 hours (also see List of slow rotators).
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The club also hosts associate leagues including the Riverdale League, the Rotators, and the Insurance Curling League. The club has sponsored winning teams at provincial curling championships. In 1955, Andy Grant won The British Consols, southern Ontario's men's curling championship. This tournament has gone through a number of name changes in its history and is now known as the TSC Tankard.
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In 2007 there was direct observational confirmation of the YORP effect on the small asteroids 54509 YORP (then designated ) and 1862 Apollo. The spin rate of 54509 YORP will double in just 600,000 years, and the YORP effect can also alter the axial tilt and precession rate, so that the entire suite of YORP phenomena can send asteroids into interesting resonant spin states, and helps explain the existence of binary asteroids. Observations show that asteroids larger than 125 km in diameter have rotation rates that follow a Maxwellian frequency distribution, while smaller asteroids (in the 50 to 125 km size range) show a small excess of fast rotators. The smallest asteroids (size less than 50 km) show a clear excess of very fast and slow rotators, and this becomes even more pronounced as smaller-sized populations are measured.
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This plot shows the distribution of rotation periods for 15,000 minor planets, plotted against their diameters. Most bodies have a period between 2 and 20 hours. This is a list of slow rotators--minor planets that have an exceptionally long rotation period. This period, typically given in hours, and sometimes called rotation rate or spin rate, is a fundamental standard physical property for minor planets.
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The moon's diameter was estimated to be 21% of that of Huntress (or 1.3 kilometers assuming a primary diameter of 6 km). In March 2012, Australian astronomer David Higgins obtained a concurring lightcurve with period of 2.44 hours and an amplitude of 0.11 magnitude (). For an asteroid of its size, Huntress has a relatively short spin rate, not much above the 2.2-hour threshold for fast rotators.
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A rotational lightcurve of Plutarchos was obtained from photometric observations taken by astronomers Julian Oey, Donald Pray and Petr Pravec in April 2007. Lightcurve analysis gave a well-defined rotation period of 2.3247 hours with a brightness variation of 0.06 in magnitude, indicating a nearly spheroidal shape (). For an asteroid of its size, Plutarchos rotates rapidly, close to the 2.2-hour threshold spin rate for fast rotators.
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In September 2013, a photometric lightcurve of Pic-du-Midi was obtained at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 2.812 hours with a brightness variation of 0.14 in magnitude (). For an asteroid of its size, Pic-du-Midi has a relatively fast spin rate, not significantly above the 2.2-hour threshold for the so-called fast rotators.
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In May 2009, a rotational lightcurve of Oulu was obtained from photometric observations by Slovak astronomer Adrián Galád at Modra Observatory. Lightcurve analysis gave a rotation period of 132.3 hours with a brightness variation of 0.33 in magnitude (). It is among the top few hundred slow rotators. Oulu is likely in a state of non-principal axis rotation, which is commonly known as tumbling.
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In December 2012, a fragmentary rotational lightcurve of Lidiya was obtained from photometric observations at the Altimira Observatory () in California. Lightcurve analysis gave a rotation period of 710 hours with a brightness amplitude of 0.60 magnitude (). This would make Lidiya one of the slowest rotators known to exist. However, since the lightcurve has such a poor quality rating, it is only a potentially slow rotator.
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In September 2010, a rotational lightcurve of Normannia was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 488.063 hours with a brightness amplitude of 0.39 magnitude (). This makes it one of the Top-100 slow rotators known to exist. Other observations gave several poor lightcurves with a much shorter period between 6.4 and 18.8 hours ().
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Between 2006 and 2016, several well defined rotational lightcurves of Tengström were obtained by astronomers David Higgins, Petr Pravec, Pierre Antonini and René Roy (). Lightcurve analysis gave a rotation period of 2.821 hours with a brightness variation between 0.17 and 0.45 magnitude. For an asteroid of its size, Tengström has a relatively fast spin rate, not far from the 2.2-hour threshold for fast rotators.
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The Girabet family of designs all feature a single main rotor, tricycle landing gear and Rotax two-stroke and four- stroke engines mounted in pusher configuration. The aircraft fuselage is made from curved steel and aluminum tubing and mounts a cruciform tail. All rotor blades and other dynamic components are built by the company in-house. All models fit pre-rotators to shorten take-off distances.
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In February 2006, a rotational lightcurve of Vavilov was obtained from photometric observations by Petr Pravec at Ondřejov Observatory in the Czech Republic. Lightcurve analysis gave a rotation period of 800 hours with a brightness amplitude of at least 0.4 magnitude () With a period above 500 hours, Vavilov is one of only a few dozen slow rotators with such an extreme spin rate currently known to exists.
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This is known to be one of the most complex of the Basic Six. Although the movement of the pelvis appears so simple it requires complex involvement and interaction of the hip-rotators and other muscles. Various movement teachers including Bartenieff, Martha Eddy and Robert Ellis Dunn have commented that unidimensional movement is actually much harder to produce that three dimensional or planar movement.
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In September 2014, American astronomer Robert Stephens obtained a rotational lightcurve from photometric observations taken at the Center for Solar System Studies (CS3, ) in California. It gave an exceptionally long rotation period of hours with a brightness amplitude of 0.55 magnitude (), which makes it one of the slowest rotators known to exist. It is also a suspected tumbling asteroid, which show a non-principal axis rotation.
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American astronomer Richard Binzel and French amateur astronomer René Roy obtained three rotational light curves of Móra from photometric observation taken in 1983 and 2009/11, respectively. Light curve analysis gave a well-defined rotation period between 2.28 and 2.30 hours with a change in brightness of 0.23 to 0.43 magnitude (). The short period is just above the threshold of 2.2 hours for the so-called fast rotators.
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They are listed separately from the more precise periods, which have a LCDB quality code, U, of 2 or 3 (unambiguous result). The periods for potentially slow rotators may be completely wrong (U = 1), have no complete and conclusive result (U = n.a.), or large error margins of more than 30% (U = 2−). A trailing plus sign (+) or minus sign (–) indicate slightly better or worse quality, respectively, than the unsigned value.
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In March 2011, a rotational lightcurve of Deira was obtained from photometric observations by Julian Oey at his Leura Observatory () in Australia. Lightcurve analysis gave a rotation period of 210.6 hours with a brightness variation of 0.5 magnitude (), while Oey previously published a slightly longer period of 217.1 hours and an amplitude of 0.6 magnitude (). This makes Deira one of the Top 300 slow rotators known to exist.
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In June 2006, a rotational lightcurve of Mitchella was obtained from photometric observations by Australian astronomer David Higgins at the Hunters Hill Observatory (). Lightcurve analysis gave a rotation period of 118.7 hours with a brightness variation of 0.60 magnitude (). With a period above 100 hours, Mitchella is one of few hundred slow rotators currently known to exists. Its high brightness amplitude is indicative for a somewhat elongated shape.
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In September 2011, a rotational lightcurve of Väisälä was obtained from photometric observations made by Czech astronomer Petr Pravec at Ondřejov Observatory. Its analysis gave a rotation period of 252 hours with a brightness variation of 0.76 magnitude (). This makes Väisälä one of the Top 200 slow rotators known to exist. The body is also suspected to be in a non- principal axis rotation (NPAR), colloquially called as "tumbling".
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Since the discovery of 1991 VG, about 80% of small asteroids with absolute magnitudes fainter than 22.0 (corresponding to sizes smaller than about 200 meters) which have had their lightcurve measured have rotation periods under 2 hours. The so-called fast rotators are typically monolithic bodies or, alternatively, welded conglomerates with a sufficient intrinsic strength to counteract centrifugal forces. More slowly rotating asteroids are sometimes gravitationally bound aggregates or rubble piles.
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An antenna rotator unit is visible in the middle of the mast. An antenna rotator is a device used to change the orientation, within the horizontal plane, of a directional antenna. Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally placed near the equipment which the antenna is connected to, while the rotator is mounted on the antenna mast directly below the antenna.
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For example, telehandlers have the ability to reach directly into a high-sided trailer or hopper. The latter application would otherwise require a loading ramp, conveyor, or similar. The telehandler can also work with a crane jib along with lifting loads, the attachments that include on the market are dirt buckets, grain buckets, rotators, power booms. The agricultural range can also be fitted with three-point linkage and power take-off.
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A common rehabilitation plan is to strengthen both the hip abductors, hip external rotators and the quadricep muscles. Commonly used exercises include isometric quadricep sets, side lying clamshells, leg dips with internal tibial rotation, etc. The idea is that because the medial side is most often stretched by the more common lateral dislocation, medial strengthening will add more stabilizing support. With progression more intense range of motion exercises are incorporated.
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Conventional (non-intelligent) fixtures are designed to accept a number of different accessories intended to assist in the modification of the output. The most common, found on almost all stage lights, is the gel frame holder. The gel frame holder is intended to hold gel, mounted in cardboard or metal gel frames. Other common accessories include gobo holders or rotators, iris holders, donuts, barn doors and color scrollers.
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In October 2013, a rotational lightcurve was obtained for this asteroid from photometric observations by American amateur astronomer Robert Stephens at the Trojan Station of the Center for Solar System Studies in Landers, California. It gave a well- defined, outstandingly long rotation period of hours with a brightness variation of 0.30 magnitude (). As of 2018, there are only about three dozens known slow rotators with periods longer than that of '.
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Major muscles included are the pelvic floor muscles, transversus abdominis, multifidus, internal and external obliques, rectus abdominis, erector spinae (sacrospinalis) especially the longissimus thoracis, and the diaphragm. The lumbar muscles, quadratus Lumborum (deep portion), deep rotators, as well as cervical muscles, rectus capitus anterior and lateralis, longus coli may also be considered members of the core group. Minor core muscles include the latissimus dorsi, gluteus maximus, and trapezius.
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The opposite is true for the shoulder, where the most common dislocation occurs in the anterior and inferior directions. Motor vehicle traffic collisions are responsible for almost all posterior hip dislocations. The posterior side of the hip exhibits primarily hip extension, dealing with the muscles: gluteus maximus, hamstring muscles (biceps femoris, semitendinosus, semimembranosus), and the six deep external rotators (piriformis, obturator externus, obturator internus, gemellus superior, gemellus inferior, and quadrates femoris).Floyd, R.T. (2009).
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In August 2008, a rotational lightcurve of Hal was obtained from photometric observations by Slovak astronomers Adrián Galád, Jozef Világi, Leonard Kornoš and Štefan Gajdoš at Modra Observatory. Lightcurve analysis gave an exceptionally long rotation period of 908 hours with a high brightness variation of 0.9 magnitude (). This makes Hal one of the slowest rotators known to exist. In addition, the body's high brightness amplitude is indicative of a non-spherical shape.
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2440 Educatio is a Florian asteroid from the inner regions of the asteroid belt, approximately in diameter. The possibly elongated S-type asteroid has an exceptionally long rotation period of 1561 hours and is one of the slowest rotators known to exist. It was discovered on 7 November 1978, by American astronomers Eleanor Helin and Schelte Bus at the Palomar Observatory in California, and later named "Educatio", the Latin word for Education.
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A large number of rotational lightcurves of Nerina have been obtained from photometric observations since 2004. The best-rated lightcurve by Robert Stephens at the Santana Observatory gave a rotation period of hours and a consolidated brightness amplitude between 0.06 and 0.32 magnitude (). Notably for an asteroid of its size, Nerina is a near-fast rotator, which have periods below of 2.2 hours and are typically much smaller bodies (see List of fast rotators).
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Since Bascoms first observation in December 2005, astronomer Peter Pravec has obtained additional lightcurves. They gave a refined rotation period for the primary of 2.74516 to 2.74544 hours with a brightness variation between 0.14 and 0.23 magnitude (). These observations also confirmed the presence of the satellite giving a concurring orbital period of 43.51 hours. For an asteroid of its size, Bascom has a relatively fast spin rate, but still above those of fast rotators.
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This tumbling also gives an alternative candidate period solution of hours, one of the longest periods ever measured. It is the third-largest tumbler known to exists (also see List of tumblers). Previous observations of Leona gave a much shorter period between 6 and 15 hours, which demonstrates the intricacy when observing slow rotators, especially those with a tumbling motion. A detailed description of the procedure of the photometric measurement is given by Pilcher.
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In November 2012, a rotational lightcurve of Kreutz was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Observatory () in Colorado. Lightcurve analysis gave a rotation period of hours with a brightness variation of 0.25 magnitude (), superseding a previous result that gave 39 hours (). As most asteroids have a much shorter rotation period of 2 to 20 hours, Kreutzes period of 280 hours is among the Top 200 slow rotators known to exist.
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Two rotational lightcurves of Johnmckay were obtained for this asteroid from photometric observations by U.S. astronomer Brian D. Warner at the Palmer Divide Station (PDO), Colorado. In August 2010, the first lightcurve gave a long rotation period of hours with a brightness variation of 1.0 in magnitude (). The second lightcurve from June 2015, gave a similar period of with an amplitude of 0.66 in magnitude (). This makes Johnmckay one of the Top 100+ slowest rotators known to exist.
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3D-chiral materials can exhibit optical activity, which manifests itself as circular birefringence, causing polarization rotation for linearly polarized waves, and circular dichroism, causing different attenuation of left- and right-handed circularly polarized waves. The former can be exploited to realize polarization rotators, while the latter can be used to realize circular polarizers. Optical activity is weak in natural chiral materials, but it can be enhanced by orders of magnitude in an artificial chiral materials, i.e., chiral metamaterials.
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Non-birefringent methods, to rotate the linear polarization of light beams, include the use of prismatic polarization rotators which use total internal reflection in a prism set designed for efficient collinear transmission. A polariser changing the orientation of linearly polarised light. In this picture, θ1 – θ0 = θi. Media that reduce the amplitude of certain polarization modes are called dichroic, with devices that block nearly all of the radiation in one mode known as polarizing filters or simply "polarisers".
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Contracting these muscles bilaterally extends the spine and unilaterally contraction bends the spine to the same side. The medial tract has a "straight" (interspinales, intertransversarii, and spinalis) and an "oblique" (multifidus and semispinalis) component, both of which stretch between vertebral processes; the former acts similar to the muscles of the lateral tract, while the latter function unilaterally as spine extensors and bilaterally as spine rotators. In the medial tract, the multifidi originates on the sacrum. Platzer (2004), pp.
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During spring 2013, a rotational lightcurve of Leucus was obtained from photometric observations made by astronomers Robert Stephens and Daniel Coley at the Center for Solar System Studies (CS3), California, using a 0.35/0.4-meter Schmidt-Cassegrain telescope. The lightcurve showed an exceptionally slow rotation period of 513.7 hours with a brightness variation of 0.53 in magnitude (). No evidence of a non-principal axis rotation (NPAR) was found. It is one of the slowest rotators known to exist.
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They gave a revised rotation period for the primary of 3.7814 to 3.7824 hours with a brightness variation between 0.10 and 0.20 magnitude (). These observations also confirmed that Johnson is a binary system, giving a concurring orbital period of 21.78 to 21.797 hours for the satellite. For an asteroid of its size, Johnson has a somewhat fast spin rate, but still significantly above those of fast rotators. CALL adopts a rotation period of 3.7824 hours with an amplitude of 0.20 magnitude.
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In April 2014, a rotational lightcurve of Endate was obtained from photometric observations by Hungarian astronomer Gyula M. Szabó. Lightcurve analysis gave it a longer-than average rotation period of 34 hours with a brightness amplitude of 0.5 magnitude (). Most minor planets have a spin rate between 2 and 20 hours. Endates rotation period is significantly longer but still much shorter than that of the so-called slow rotators, which take at least 100 hours to rotate once around their axis.
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Only five of the 34 could be described as fast rotators. Observations from LAMOST have been used to measure chromospheric activity of 5,648 solar- like stars in the Kepler field, including 48 superflare stars. These observations show that superflare stars are generally characterized by larger chromospheric emissions than other stars, including the Sun. However, superflare stars with activity levels lower than, or comparable to, the Sun do exist, suggesting that solar flares and superflares most likely share the same origin.
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The asteroid has an ambiguous lightcurve. While a lightcurve, obtained at the Palomar Transient Factory in September 2013, gave a rotation period of 108.259 hours with a brightness amplitude of 0.48 magnitude (), another lightcurve modeled from combined dense and sparse photometry gave a sidereal period of 16.5931 hours.(). If the first result were correct, Sofala would be one of few hundred known slow rotators with a period above 100 hours. The Lightcurve Data Base, however, adopts the shorter period from the modeled lightcurve.
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These units typically cost around US$70 . Heavy-duty ham rotators are designed to turn extremely large, heavy, high frequency (shortwave) beam antennas, and cost hundreds or possibly thousands of dollars. In the center of the reference picture, the accompanying image includes an AzEl installation rotator, so named for its controlling of both the azimuth and the elevation components of the direction of an antenna system or array. Such antenna configurations are used in, for example, amateur-radio satellite or moon-bounce communications.
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In September 2013, a rotational lightcurve of Palermo was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave an exceptionally long rotation period of 213.368 hours with a high brightness amplitude of 0.97 magnitude, indicative for an elongated shape (). Palermo is a slow rotator as most asteroids have periods shorter than 20 hours. There are more than 600 known slow rotators with a spin rate of more than 100 hours.
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Photometric observations taken in 2006 and 2011, by Adrián Galád and by the Palomar Transient Factory, showed a leisurely rotation period of 105.745 and hours with a brightness variation of and 0.46 magnitude, respectively (). While most asteroids rotate within 20 hours once around their axis, Barry belongs to the relatively small group of slow rotators with a period above 100 hours. It may have a non-principal axis rotation. However, no follow-up measurements have since confirmed its tumbling motion.
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All gobo rotators require an external power source, separate from the lighting fixtures power. Many models allow for remote DMX512 control of motor, permitting fine control of rotation speed and orientation of pattern. Features can also include uni- or bi-directional control of the rotation of a pattern, as well as indexing (tracking a patterns position to return it to the same orientation repeatedly.) Several models are available which can hold two patterns simultaneously, and may allow patterns to rotate separately or in opposite directions.
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In December 2011, a rotational lightcurve of Inkeri was obtained from photometric observations by Andrea Ferrero at the Bigmuskie Observatory , Italy, in collaboration with Frederick Pilcher at the Organ Mesa Observatory in New Mexico, United States. Analysis of the bimodal lightcurve gave an exceptionally long rotation period of 660 hours with a brightness amplitude of 1.30 magnitude (). This makes it one of the slowest rotators known to exist. The observers also suspect that the body is a tumbling asteroid in a non-principal axis rotation.
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From September to November 2011, four rotational lightcurves of Pielinen were obtained from photometric observations. One lightcurve analysis gave a rotation period of 66.2 hours, which is significantly longer than for most minor planets, that spin every 2 to 20 hours around their axis. However, slow rotators have periods typically above 100 hours. Photometric observations were taken by Petr Pravec (66.22 hours, Δ0.85 mag, ), Robert D. Stephens (66.34 hours, Δ0.80 mag, ), Giovanni Casalnuovo (66.1 hours, Δ0.75 mag, ), and Silvano Casulli (67.43 hours, Δ0.81 mag, ).
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Movements for the posterior deltoid done in the transverse plane are also referred to by terms like rear delt fly, reverse fly, rear lateral raise, bent-over lateral raises or other variations. Other muscles that aid the posterior deltoid include the two lateral rotators of the rotator cuff: the infraspinatus and teres minor. Other muscles such as the lats and middle delts can also come into action, dependent on how the shoulder is rotated. To execute the exercise, the weightlifter attains a prone rib cage position.
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Be Stars are fast rotators (>200 km/s) with a large stellar wind and high mass loss rate, hence the causative factors behind these gaseous rings. Due to its apparent brightness, the star most recognized for its fast rotation is Achernar, a phenomenon which causes it to be highly oblate. Its rotational velocity, however, of 251 km/s is considerably slower than Pleione's 329 km/s. As a result, Pleione actually revolves on its axis once every 11.8 hours compared to Achernar's 48.4 hours.
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Overall, those with poor ability were faster and more accurate identifying images that were consistently colored. The verbal protocol analysis showed that the subjects with low spatial ability mentioned color in their mental rotation tasks more often than participants with high spatial ability. One thing that can be shown through this experiment is that those with higher rotational ability will be less likely to represent color in their mental rotation. Poor rotators will be more likely to represent color in their mental rotation using piecemeal strategies (Khooshabeh & Hegarty, 2008).
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A half-wave plate rotates polarization by 90° A polarization rotator is an optical device that rotates the polarization axis of a linearly polarized light beam by an angle of choice. Such devices can be based on the Faraday effect, on birefringence, or on total internal reflection.F. J. Duarte, Tunable Laser Optics, 2nd Edition (CRC, New York, 2015) Chapter 5. Rotators of linearly polarized light have found widespread applications in modern optics since laser beams tend to be linearly polarized and it is often necessary to rotate the original polarization to its orthogonal alternative.
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It would be extremely interesting to establish a relation between the extent of this zone and the rotation velocity and/or the magnetic field of the star. Seismic analysis of V2052 Ophiuchi shows that this star although rapidly rotating, which would favor extra-mixing, could be devoid of such a region. The magnetic field detected in this star could be the reason of this lack of extra-mixing. # Be stars: Late Be type stars HD 181231 and HD 175869 are very rapid rotators, about 20 times more rapid than the Sun.
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In May 2011, a rotational lightcurve of Zimmerwald was obtained by American astronomer Robert Stephens at the Center for Solar System Studies, California, using photometric observations taken at the Santana and Goat Mountain observatories (). Lightcurve analysis gave a very long rotation period of hours with a change in brightness of 0.60 magnitude (). It is also suspected, that the body might be in a nonprincipal axis rotation, which is commonly known as "tumbling". While the slowest rotators have periods above 1000 hours, the majority of minor planets have periods shorter than 20 hours.
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In November 2009, a rotational lightcurve of Soma was obtained from photometric observations by astronomers Petr Pravec, Donald Pray and Peter Kušnirák at Carbuncle Hill Observatory, Rhode Island, and Ondřejov Observatory, in the Czech Republic, respectively. Lightcurve analysis gave a rotation period of 2.7327 hours with a brightness variation of 0.08 magnitude, indicating that the body has a nearly spheroidal shape (). The body's spin rate is within the 2.2-to-20 hours range found for most asteroids, about half an hour longer than the so-called fast rotators.
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In October 2016, a rotational lightcurve of Leona was obtained from photometric observations by astronomers Frederick Pilcher (see naming cite for ) at Organ Mesa Observatory (), United States, Lorenzo Franco at Balzaretto Observatory (), Italy, and Petr Pravec at the Ondřejov Observatory, Czech Republic. Lightcurve analysis gave a well- defined rotation period of hours with a brightness variation of 0.5 magnitude (). This makes Leona one of the Top 100 slowest rotators known to exist. The astronomers also detected a non-principal axis rotation seen in distinct rotational cycles in successive order.
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New options for the 1970 4-4-2 included GM's variable-ratio power steering (option N47), a console-mounted Hurst Dual/Gate shifter for use with the Turbo Hydra-matic transmission, and aluminum differential housing and cover (option W27). All Oldsmobile V8s received new Positive Valve Rotators for the 1970s to increase engine valve life. 1970 model year spotting tips: vertical bars in silver grille, rectangular parking lights in front bumper, vertical tail lights. A 1970 Oldsmobile 4-4-2 was featured in the chase scene of the movie Demolition Man starring Sylvester Stallone.
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Rotation rates of massive stars have a critical influence on their evolution and eventual death. The rotation rate of the Eta Carinae stars cannot be measured directly because their surfaces cannot be seen. Single massive stars spin down quickly due to braking from their strong winds, but there are hints that both Eta Carinae A and B are fast rotators, up to 90% of critical velocity. One or both could have been spun up by binary interaction, for example accretion onto the secondary and orbital dragging on the primary.
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At 632 nm, the Verdet constant for TGG is reported to be , whereas at 1064 nm it falls to . This behavior means that the devices manufactured with a certain degree of rotation at one wavelength, will produce much less rotation at longer wavelengths. Many Faraday rotators and isolators are adjustable by varying the degree to which the amount of the Faraday rotator material is inserted into the magnetic field of the device. In this way, the device can be tuned for use with a range of lasers within the design range of the device.
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The spectrum of this star matches a stellar classification of A1 V, which identifies it as an A-type main sequence star that is generating energy through the nuclear fusion of hydrogen at its core. An unusual abundance of the element europium demonstrates it to be a peculiar, or Ap star. Most stars of this type are slow rotators, but Gamma Trianguli Australis displays a very high rate of rotation with a projected rotational velocity of 199 km s−1. It has an estimated age of 260 million years.
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Photometric observations of McCleese by Brian Warner and René Roy in 2005 and 2007, gave three rotational lightcurves that had a rotation period between 7.2 and 28.8 hours with a brightness variation of 0.06 to 0.50 magnitude (). In June 2010, McCleese was again observed by Brian Warner at his Palmer Divide Observatory in Colorado, United States. By combining his data points with the previously obtained photometric data, he was able to derive a period of hours with an amplitude of 1.30 magnitude (). With a period of 418 hours, the body is one of the Top 100 slow rotators known to exist.
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Candidates are reviewed by the Alan T. Waterman Award committee, which is made up of 12 members, 8 rotators and 4 members ex officio. The current ex officio members are Ralph Cicerone, President of the National Academy of Sciences, Subra Suresh, Director of the National Science Foundation, Steven C. Beering, Chairman of the National Science Board, and Charles M. Vest, President of the National Academy of Engineering. After review of the nominees, the Committee recommends the most outstanding candidate(s) to the Director of the National Science Foundation and the National Science Board, which then makes the final determination.
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The ilium of the hip of Ambulocetus, like remingtonocetids, features deep depressions to support the rectus femoris and the gluteal muscles. Unlike terrestrial mammals and protocetids, the ischium is expanded dorsolaterally (from left to right, and leaning towards the head), which would have increased lever arm for thigh and leg retractor muscles when extended, such as while swimming. This would have also increased the surface area of the gemelli muscles (hip rotators which stabilise the hip) and the tail muscles. The widening of the ischial width may have also given Ambulocetus a more streamlined and thus hydrodynamic body.
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During 2015, two rotational lightcurves of were obtained from photometric observations by Brian Warner at the Palmer Divide Station () in California and by astronomers of the Mission Accessible Near-Earth Objects Survey (MANOS). Lightcurve analysis gave a rotation period of 0.3761 and 0.3763 hours (22.6 minutes) with a brightness amplitude of 1.50 and 1.29 magnitude (), indicative of a non-spheroidal shape. It is among the fastest rotators known to exists. In July 2015, high-resolution images of were obtained from radiometric observations made with the Very Long Baseline Array, the Arecibo Observatory, and the 34 and 70-meter antennas at Goldstone.
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A reflection in one axis of a plane is always equivalent to a reflection and rotation in two other axes (with the angle between the source and image being twice the angle between the source and reflection axis of the prism). Thus, Dove prisms can be used to create beam rotators, which have applications in fields such as interferometry, astronomy, and pattern recognition. Lesso and Padgett (1999) and Moreno et al. (2003, 2004) found that there is a change in the state of polarization of a beam of light on passing through a rotated dove prism.
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BIR pulses, also called “universal rotators,” induce arbitrary flip angles for all spins in a plane perpendicular to the rotation axis defined by Beffective. The plane that is perpendicular to Beffective is only defined by the direction of Beffective, and not the strength of Beffective. As long as adiabaticity is maintained during rotations of Beffective, inhomogeneities in the B1 field strength will not have an effect on the flip-angle of the magnetization after a BIR pulse. Two commonly analyzed BIR pulse sequences are explained and summarized here: the BIR-1 and BIR-4 pulse sequences.
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This shop had nine oil-fired heating furnaces, including a car bottom type annealing furnace, all with doors operated by compressed air. The shop also contained a 50-ton steam hydraulic press capable of delivering a 1,000-ton pressure, a 4,000 lb double frame steam hammer with a 2-ton capacity, a 20-ton overhead crane and 10-ton auxiliary hoist along with two 25-ton rotators, and even its own railway siding and derrick."Work at the Morse Yard", The Rudder, November 1919, pp. 520-521. Other facilities of the Morse yard around this time included a three-story machine shop, carpentry shop, pattern and joining shop, storage depots etc.
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An electrician focuses a light Theatre electricians are responsible for all non-design aspects of the lighting in a theatrical production. They may also be responsible for special effects (such as fog) and powering other electrical items (such as motors) used in the production. Electricians install (hang), point and shape the beam (focus), and connect to power (circuit) lighting instruments. Additionally they may add gel to color the light, patterns (or gobos) to create texture or shape a light into pictures, and accessories that give the designer the ability to change some aspect of the light, such as scrollers (color changers) or pattern effects (gobo rotators).
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Other non- invasive treatments include things such as, flexibility and strength training, neuromuscular/gait training, manual therapy, training volume reduction, or changes in running shoe. Muscular training of the gluteus maximus and hip external rotators is stressed highly as those muscles are associated with many of the risk factors of ITBS. For runners specifically, neuromuscular/gait training may be needed for success in muscular training interventions to ensure that those trained muscles are used properly in the mechanics of running. Strength training alone will not result in decrease in pain due to ITBS, however, gait training, on its own can result in running form modification that reduces the prevalence of risk factors.
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The high-beam lights indicator was a red rocket located on the dash. Also new was a steering column-mounted ignition switch that also locked the steering wheel when not in use – a feature found on all 1969-model General Motors passenger cars, a year before locking steering columns were required by federal mandate starting in 1970. 1970 Oldsmobile Delta 88 Town Sedan Only detail changes were made for the 1970 full-sized Oldsmobiles including a new split grille that no longer extended to surround the headlights and a slightly revised rear section. Powertrain selections were carried over from 1969 with both 350 and 455 cubic-inch Rocket V8s now featuring "Positive Valve Rotators" for longer engine life and more efficient operation.
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Stars of early spectral type (>F8) are often ignored by radial velocity (RV)-based planet searches due to issues with precision: their high temperature decreases the depth of their spectral lines and they tend to be fast rotators, which broadens their spectral lines. Still, it is still sometimes possible to reach levels of precision capable of the detection of planets in AF-type stars, so Zeta Doradus A was included in a sample early-type stars observed with HARPS. The star was found to be RV-stable to 17 m/s with internal uncertainties of 3 m/s, which indicates that the star does not have any close-in high mass companions, but does not preclude the presence of sub-Jovian mass planets.
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"The brachial plexus may be injured by falls from a height on to the side of the head and shoulder, whereby the nerves of the plexus are violently stretched… The brachial plexus may also be injured by direct violence or gunshot wounds, by violent traction on the arm, or by efforts at reducing a dislocation of the shoulder joint". Brachial plexus lesions can be divided into three types: # An upper brachial plexus lesion, which occurs from excessive lateral neck flexion away from the shoulder. Most commonly, forceps delivery or falling on the neck at an angle causes upper plexus lesions leading to Erb's palsy. This type of injury produces a very characteristic sign called Waiter's tip deformity due to loss of the lateral rotators of the shoulder, arm flexors, and hand extensor muscles.
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An ATSC-capable DVD unit can also serve as a more-powerful alternative to digital television adapters, which allow DTV reception with older NTSC analog televisions. The DVD recorders offer additional capabilities, such as automated VCR-style timeshifting of programming and a variety of output formats, that are deliberately not included in the most common mass-market US ATSC converters. Unlike the more common digital television adapter boxes, newer DVD recorder units are able to tune both analog and digital signals - an advantage when receiving low-power television and foreign (analogue) signals. Some, however, do suffer from many of the same design limitations as the less costly converter boxes, including poorly designed signal strength meters, incomplete display of broadcast program information, incompatibility with antenna rotators or CEA-909 smart antennas and inability to add digital channels without wiping out all existing channels and rescanning the entire band.
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Michael D. Ercolino (1906 - November 13, 1982)[ was an inventor who invented a homing device used by the United States D-Day invasion and in West Africa during World War II. This device made it possible for paratroopers who landed behind enemy line to reorganize into homogeneous fighting units. He invented the Conical V Beam TV antenna which was sold throughout the United States in the early 1940s and was responsible for making TV reception possible throughout the U.S. He founded Telrex Inc. which manufactured a line of communication antennas, heavy duty rotators, and heavy duty rotatable mono poles which were capable holding a number of high frequency communication antennas used on the dew line in northern Canada and sold throughout the world. Telrex communication systems were so cherished for the performance and durability that a Telrex antenna system installed on the US Embassy in Saigon Vietnam was removed after the US pulled out and reinstalled in Cambodia.
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In order to determine whether superflares can occur on the Sun, it is important to narrow the definition of Sun-like stars. When the temperature range is divided into stars with Teff above and below 5600K (early and late G-type stars), stars of lower temperature are about twice as likely to show superflare activity as those in the solar range and those that do so have more flares: the occurrence frequency of flares (number per star per year) is about five times as great in the late-type stars. It is well known that both the rotation rate and the magnetic activity of a star decrease with age in G-type stars. When flare stars are divided into fast and slow rotators, using the rotation period estimated from brightness variations, there is a general tendency for the fastest-rotating (and presumably youngest) stars to show a greater probability of activity: in particular, stars rotating in less than 10 days are 20-30 times more likely to have activity.
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