251
251
Aug 8, 2008
08/08
by
Drayson, Alfred W. (Alfred Wilks), 1827-1901
texts
eye 251
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Book digitized by Google from the library of Oxford University and uploaded to the Internet Archive by user tpb.
Topic: Precession
Source: http://books.google.com/books?id=UjIDAAAAQAAJ&oe=UTF-8
http://uf.catalog.fcla.edu/uf.jsp?st=UF001659172&ix=nu&I=0&V=D
Topic: Precession.
8
8.0
Oct 9, 2020
10/20
by
Center for Accessible Technology in Sign
movies
eye 8
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comment 0
ASL vocabulary
Topic: precession
358
358
Apr 27, 2012
04/12
by
Whitall, Henry, 1819-1887?
texts
eye 358
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broadside. 44 x 44 cm
Topics: Planispheres, Precession
405
405
May 10, 2009
05/09
by
Alembert, Jean Le Rond d', 1717-1783
texts
eye 405
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Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Topics: Precession, Nutation, Astronomy
Source: http://books.google.com/books?id=vro5AAAAMAAJ&oe=UTF-8
1,254
1.3K
Apr 10, 2008
04/08
by
Klein, Felix, 1849-1925
texts
eye 1,254
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Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Topics: Tops, Precession, Nutation, Latitude variation, Gyroscopes, Gyroscopes, Latitude variation,...
Source: http://books.google.com/books?id=3M_KuNlyB9gC&oe=UTF-8
332
332
Jun 20, 2010
06/10
by
Lieske, J
texts
eye 332
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Precession quantities and numerical partial derivatives as power series in time from arbitrary epoch
Topics: AMOUNT, DERIVATION, NUMERICAL ANALYSIS, POWER SERIES, PRECESSION, NUMERICAL ANALYSIS, POWER SERIES,...
14
14
Jul 20, 2021
07/21
by
Worthen, Thomas D
texts
eye 14
favorite 1
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x, 318 p. : 24 cm
Topics: Mythology -- Comparative studies, Precession -- Miscellanea
1,033
1.0K
Jul 16, 2009
07/09
by
Klein, Felix, 1849-1925; Sommerfeld, Arnold, 1868-1951, joint author
texts
eye 1,033
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Book digitized by Google from the library of the University of California and uploaded to the Internet Archive by user tpb.
Topics: Tops, Precession, Nutation, Latitude variation, Gyroscopes
Source: http://books.google.com/books?id=SCVsAAAAIAAJ&oe=UTF-8
University of Michigan Books
1,892
1.9K
Dec 21, 2011
12/11
by
Klein, Felix, 1849-1925; Sommerfeld, Arnold, 1868-1951
texts
eye 1,892
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At head of title: F. Klein und A. Sommerfeld
Topics: Tops, Precession, Nutation, Latitude variation, Gyroscopes
viii, 86 p. 22 cm
Topics: Spherical harmonies, Precession, Nutation, Earth -- Figure
California Digital Library
1,769
1.8K
Mar 15, 2007
03/07
by
Barnard, J. G. (John Gross), 1815-1882
texts
eye 1,769
favorite 0
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iii, 52 p. 33 cm
Topics: Mechanics, Gyroscopes, Pendulum, Precession, Nutation, Earth -- Rotation
489
489
Jun 20, 2017
06/17
by
Cole, John, 1792-1848. n 96082257
texts
eye 489
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comment 1
On spine: Zodiac of Tentyra
favoritefavoritefavoritefavorite ( 1 reviews )
Topics: Zodiac, Astronomy, Antiquities, Astronomy, Egyptian, Precession, Zodiac
594
594
May 26, 2011
05/11
by
Choi, Sung R.; Gyekenyesi, John P
texts
eye 594
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The fracture mirror and crack branching constants were determined from three glasses and nine advanced ceramics tested under various loading and specimen configurations in an attempt to use the constants as a data base for fractography. The ratios of fracture mirror or crack branching constant to fracture toughness were found to be approximately two for most ceramic materials tested. A demonstration of how to use the two constants as a tool for verifying stress measurements was presented for...
Topics: ACCRETION DISKS, X RAY BINARIES, PRECESSION, TORQUE, STABILITY
626
626
Jun 15, 2011
06/11
by
Norris, J
texts
eye 626
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Gamma-ray burst data obtained from the ISEE-3 Gamma Ray Burst Spectrometer and the Solar Maximum Mission's Hard X-ray Burst Spectrometer (HXRBS) were analyzed to yield information on burst temporal and spectral characteristics. A Monte Carlo approach was used to simulate the HXRBS response to candidate spectral models. At energies above about 100 keV, the spectra are well fit by exponential forms. At lower energies, 30 keV to 60 keV, depressions below the model continua are apparent in some...
Topics: AIRSPEED, STROUHAL NUMBER, TRANSDUCERS, VORTEX PRECESSION, WIND TUNNEL TESTS, INCOMPRESSIBLE FLOW,...
The IAU Working Group on Precession and the Equinox looked at several solutions for replacing the precession part of the IAU 2000A precession-nutation model, which is not consistent with dynamical theory. These comparisons show that the precession theory, P03, is both consistent with dynamical theory and the solution most compatible with the IAU 2000A nutation model. Thus, the working group recommends the adoption of the P03 precession theory for use with the IAU 2000A nutation. The two...
Topics: DTIC Archive, Hilton, J L, NAVAL OBSERVATORY WASHINGTON DC, *ASTRONOMY, *ECLIPSES, *PRECESSION
Introduction. The paper is devoted to the study on free oscillations of the sensing element of a micromechanical R-Rtype gyroscope of frame construction developed by the Kuznetsov Research Institute of Applied Mechanics, taking into account the nonorthogonality of the torsion axes. The influence of the instrumental manufacturing error on the accuracy of a gyroscope on a movable base in the case of free oscillations is studied. The work objective was to improve the device accuracy through...
Topics: gyroscope R-R type, gyro precession, gyro error estimation, micromechanical gyroscope, free...
512
512
Jul 15, 2009
07/09
by
Bureau of Equipment , Bureau of Navigation
texts
eye 512
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Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Topics: stars, proper, motions, motion, parallactic, correction, precession, precessional, derived,...
Source: http://books.google.com/books?id=UHoRAAAAYAAJ&oe=UTF-8
Bell System Technical Journal, 42: 5. September 1963 pp 2169-2193. Spin Decay, Spin-Precession Damping, and Spin-Axis Drift of the Telstar Satellite. (Yu, E.Y.)
Topics: spin, precession, satellite, decay, axis, magnetic, angular, telstar, torque, geomagnetic, angular...
1,077
1.1K
Jul 11, 2010
07/10
by
NON
texts
eye 1,077
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Information regarding the availability of LANDSAT imagery processed and input to the data files by the NASA Data Processing Facility is published on a monthly basis. The U.S. Standard Catalog includes imagery covering the continental United States, Alaska and Hawaii. The Non-U.S. Standard Catalog identifies all the remaining coverage. Sections 1 and 2 describe the contents and format for the catalogs and the associated microfilm. Section 3 provides a cross-reference defining the beginning and...
Topics: ANGULAR MOMENTUM, SPACE SHUTTLES, SPACECRAFT RECOVERY, TELEOPERATORS, EQUATIONS OF MOTION,...
34
34
Jul 27, 2019
07/19
by
Alembert, Jean Le Rond d', 1717-1783
texts
eye 34
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xxxviii, 184 p. 24 cm
Topics: Astronomy -- Early works to 1800, Nutation -- Early works to 1800, Precession -- Early works to 1800
A true airspeed sensor based on the precession of a vortex whistle for sensing airspeeds up to 321.9 km/hr (200 mph). In an attempt to model the complicated fluid mechanics of the vortex precession, three dimensional, inviscid, unsteady, incompressible fluid flow was studied by using the hydrodynamical linearized stability theory. The temporal stability approach was used to derive the relationship between the true airspeed and frequency response. The results show that the frequency response is...
Topics: NASA Technical Reports Server (NTRS), AIRSPEED, INCOMPRESSIBLE FLOW, INVISCID FLOW, PRECESSION,...
The classical mechanics results for free precession which are needed in order to calculate the weak field, slow-motion, quadrupole-moment gravitational waves are reviewed. Within that formalism, algorithms are given for computing the exact gravitational power radiated and waveforms produced by arbitrary rigid-body freely-precessing sources. The dominant terms are presented in series expansions of the waveforms for the case of an almost spherical object precessing with a small wobble angle....
Topics: NASA Technical Reports Server (NTRS), GRAVITATIONAL FIELDS, GRAVITATIONAL WAVES, ROTATING BODIES,...
Literal expressions for the precessional motion of the mean equator referred to an arbitrary epoch are constructed. Their numerical representations, based on numerical values recommended at the working meeting of the International Astronomical Union Commission held in Washington in September 1974, are obtained. In constructing the equations of motion, the second-order secular perturbation and the secular perturbation due to the long-periodic terms in the motions of the moon and the sun are...
Topics: NASA Technical Reports Server (NTRS), EQUATIONS OF MOTION, EQUATORS, PRECESSION, HAMILTONIAN...
Warped H1 gas layers in the outer regions of spiral galaxies usually display a noticeably twisted structure. This structure is thought to arise primarily as a result of differential precession in the H1 disk as it settles toward a 'preferred orientation' in an underlying dark halo potential well that is not spherically symmetric. In an attempt to better understand the structure and evolution of these twisted, warped disk structures, we have utilized the 'twist-equation' formalism. Specifically,...
Topics: NASA Technical Reports Server (NTRS), ACCRETION DISKS, GALAXIES, H I REGIONS, HALOS, PRECESSION,...
454
454
Sep 20, 2010
09/10
by
Novik, Dmitry A.; Tilton, James C
texts
eye 454
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The compression, or efficient coding, of single band or multispectral still images is becoming an increasingly important topic. While lossy compression approaches can produce reconstructions that are visually close to the original, many scientific and engineering applications require exact (lossless) reconstructions. However, the most popular and efficient lossless compression techniques do not fully exploit the two-dimensional structural links existing in the image data. We describe here a...
Topics: ATTITUDE (INCLINATION), ECLIPTIC, TELEMETRY, TRANSMITTERS, GEOMAGNETISM, NUTATION, PRECESSION,...
284
284
Sep 20, 2010
09/10
by
Hashmall, J.; Garrick, J
texts
eye 284
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Flight Dynamics Facility (FDF) responsibilities for calibration of Upper Atmosphere Research Satellite (UARS) sensors included alignment calibration of the fixed-head star trackers (FHST's) and the fine Sun sensor (FSS), determination of misalignments and scale factors for the inertial reference units (IRU's), determination of biases for the three-axis magnetometers (TAM's) and Earth sensor assemblies (ESA's), determination of gimbal misalignments of the Solar/Stellar Pointing Platform (SSPP),...
Topics: DIURNAL VARIATIONS, BULGING, DRAG, PERTURBATION, DRIFT RATE, GEOPOTENTIAL, NOAA SATELLITES,...
An important component of Milankovitch's astronomical theory of climate change is the precession index. The precession index, along with the Earth's tilt and orbital eccentricity, are believed to be the major controlling factors of climate change in the last few million years. The precession index is e sin omega(sub s) where e is the Earth's orbital eccentricity and omega(sub s) measures how close the Sun is to the Earth at midsummer. When omega(sub s) = 90deg the Sun is close to the Earth...
Topics: NASA Technical Reports Server (NTRS), CLIMATE CHANGE, PRECESSION, SOLAR ORBITS, ECCENTRICITY,...
The discussion of new tests of relativity must begin with a definition of the word new. Included, under that rubric, not only tests that have never been attempted before or never produced a useful result, but also those that may be repeated with significantly improved results. Thus, the classical tests insofar as they have been recently refined are discussed and the results are given obtained at the Center for Astrophysics (CFA). A new test of relativity is described via the detection of the de...
Topics: NASA Technical Reports Server (NTRS), GRAVITATIONAL WAVES, RELATIVITY, ASTROPHYSICS, MERCURY...
249
249
May 23, 2011
05/11
by
Franklin, James A
texts
eye 249
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This report describes revisions to a simulation model that was developed for use in piloted evaluations of takeoff, transition, hover, and landing characteristics of an advanced short takeoff and vertical landing lift fan fighter aircraft. These revisions have been made to the flight/propulsion control system, head-up display, and propulsion system to reflect recent flight and simulation experience with short takeoff and vertical landing operations. They include nonlinear inverse control laws...
Topics: BINARY DATA, SULFUR, ARGON, SILICON, NICKEL, IRON, ACTIVE GALACTIC NUCLEI, GAS JETS, ASTROPHYSICS,...
The design and construction of a data recording and processing system is described which permits simultaneous measurements from three proton free-precession magnetometers to be written onto tape at two second intervals. Detailed circuit diagrams and a computer program used for de-bugging the magnetic tape output are presented.
Topics: data recording and processing, proton free-precession magnetometer, geomagnetic field measurements,...
The radiation-driven warping instability discovered by Pringle holds considerable promise as the mechanism responsible for producing warped, precessing accretion disks in X-ray binaries. This instability is an inherently global mode of the disk, thereby avoiding the difficulties with earlier models for the precession. Here we follow up on earlier work to study the linear behavior of the instability in the specific context of a binary system. We treat the influence of the companion as an...
Topics: NASA Technical Reports Server (NTRS), ACCRETION DISKS, X RAY BINARIES, PRECESSION, TORQUE,...
The note is a description of the subprograms DOP, which calculates the Doppler velocity of an earth-bound observer, JULDA which calculates the Julian day-number, MOVE which calculates precession, COORD which performs coordinate transformations, and the GRM series of subprograms which deal with Doppler velocities in terms of a standard galactic rotation model. These subprograms are written in basic FORTRAN and should be useable on a wide variety of computers.
Topics: DTIC Archive, Ball, John A, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *ASTRONOMY,...
RXTE ASM count rates from the X-ray pulsar Her X-1 began falling consistently during the late months of 2003. The source is undergoing another state transition similar to the anomalous low state of 1999. This new event has triggered observations from both space and ground-based observatories. In order to aid data interpretation and telescope scheduling, and to facilitate the phase-connection of cycles before and after the state transition, we have re-calculated the precession ephemeris using...
Topics: NASA Technical Reports Server (NTRS), X RAYS, PULSARS, CLOCKS, X RAY TIMING EXPLORER, PRECESSION,...
We are engaged in testing gravitational theory by means of observations of objects in the solar system. This work tests the equivalence principle (EP), the Shapiro time delay, the advances of planetary perihelion, the possibility of a secular variation G(dot) in the 'gravitational constant' G, and the rate of the de Sitter (geodetic) precession of the Earth-Moon system. We describe here the results under this contract.
Topics: NASA Technical Reports Server (NTRS), EARTH-MOON SYSTEM, GRAVITATIONAL CONSTANT, PERIODIC...
We present results of three-dimensional, hydrodynamic models of gaseous disks settling in a nonspherical potential. As the gas settles, differential precession creates a warped disk similar to the warps seen in spiral galaxies. A logarithmic potential, indicative of a massive halo, seems to induce warps more extreme than those produced by a l/r potential with a quadrupole distortion.
Topics: NASA Technical Reports Server (NTRS), ANGULAR MOMENTUM, MOMENTUM TRANSFER, PRECESSION, SPIRAL...
Results of testing the effectiveness of the theory of precessional dynamos in the generation of the magnetic fields of the planets are presented. It is shown that the magnetic state of Earth and of the planets Mars, Jupiter, and Venus can be satisfactorily described by the formula H(i) = H(3) V(i)/V(3) T(3)/T(i) omega(i)/omega(3) sin(alpha 1)/sin(alpha 2) where H, V, T, omega and alpha are the dipole fields, volumes of liquid cores, periods of rotation, rates of precession, and angles between...
Topics: NASA Technical Reports Server (NTRS), DYNAMO THEORY, PLANETARY CORES, PLANETARY MAGNETIC FIELDS,...
The effects of precession thrust pulses and energy dissipation upon nutation of a spin-stabilized spacecraft are studied. Methods for controlling nutation during a precession maneuver are proposed and examined. A precession modulation control law is developed which uses precession thrust pulses to control nutation. Digital simulations show that precession control with separate nutation control is the fastest precessing system; however, the precession modulation method is only fractionally...
Topics: NASA Technical Reports Server (NTRS), NUTATION, PRECESSION, SPACECRAFT STABILITY, SPIN...
163
163
May 27, 2011
05/11
by
Maglieri, Domenic J.; Hubbard, Harvey H
texts
eye 163
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Experimental noise studies were conducted on model configurations of some proposed jet-augmented flaps to determine their far-field noise characteristics. The tests were conducted using cold-air jets of circular and rectangular exits having equal areas, at pressure ratios corresponding to exit velocities slightly below choking. Results indicated that the addition of a flap to a nozzle may change both its noise radiation pattern and frequency spectrum. Large reductions in the noise radiated in...
Topics: VARIABILITY, PENETRATION, OCCULTATION, CYCLES, ACCRETION DISKS, NEUTRON STARS, EXPLORATION,...
Pivoting slips are calculated for the ball-race and ball-ball contacts in a retainerless bearing. The calculation is kinematic, ignoring all inertial loadings. Pure spin and uniform precession of the balls are considered. Pivoting slip magnitudes are compared with several other kinds of slip which were previously reported in an R4 size bearing.
Topics: NASA Technical Reports Server (NTRS), ANGULAR VELOCITY, BALL BEARINGS, KINEMATICS, PIVOTS, SLIDING,...
The insolation parameters of the Earth depend on its orbital parameters and on the precession and obliquity. Until 1988, the usually adopted solution for paleoclimate computation consisted in (Bretagnon, 1974) for the orbital elements of the Earth, which was completed by (Berger, 1976) for the computation of the precession and obliquity of the Earth. In 1988, I issued a solution for the orbital elements of the Earth, which was obtained in a new manner, gathering huge analytical computations and...
Topics: NASA Technical Reports Server (NTRS), INSOLATION, MATHEMATICAL MODELS, ORBITAL ELEMENTS,...
It is shown that Weinstein and Whitmire in extending the Thomas precession to an extended rotating disk have made implicit assumptions about integrability, common disk times, and the disk proper frame which have not been justified.
Topics: DTIC Archive, Newburgh, R G, AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA, *RELATIVITY THEORY,...
308
308
May 23, 2011
05/11
by
Sasselov, Dimitar D
texts
eye 308
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During the period covered by this report the results from our last paper on the ROSAT observations of zeta Gem (Sasselov & Sabbey 1994) became the basis for multi-wavelength comparison of energy distributions of Cepheid variables and nonvariable supergiants. The findings were that the non-radiative ultraviolet flux in the IUE data on nonvariable supergiants is nonexistent or much reduced in Cepheids. At the same time, the energy distributions at longer wavelengths are identical. The...
Topics: PULSARS, PRECESSION, X RAY BINARIES, SPECTRAL EMISSION, ULTRAVIOLET EMISSION, X RAY SPECTRA,...
It was believed until very recently that a near-equatorial satellite would always keep up with the planet's equator (with oscillations in inclination, but without a secular drift). This misconception originated from a wrong interpretation of a (mathematically correct) result obtained in terms of non-osculating orbital elements. A similar analysis carried out in the language of osculating elements will endow the planetary equations with some extra terms caused by the planet's obliquity change....
Topics: DTIC Archive, Efroimsky, Michael, NAVAL OBSERVATORY WASHINGTON DC, *ORBITS, *DRIFT, *MATHEMATICAL...
372
372
May 27, 2011
05/11
by
Grant, Frederick C
texts
eye 372
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Simple formulas are given for the stagnation-point convective heat 1 loads in lunar return for two operational modes. The two modes of operation analyzed are typical of moderate heating and of nearly minimum heat loads, respectively. The values of the parameters in a simple two- parameter formula for the total-heat load are given in the lift-drag-ratio range of 0.2 to 1.0 and in the peak loading range of 2g to 10g. For vehicles having a lift-drag ratio near 0.5, which is typical of many...
Topics: ACTIVE CONTROL, ANALOG COMPUTERS, GYROSCOPES, PRECESSION, TORQUE, SPIN REDUCTION, SPIN DYNAMICS,...
The cometary nucleus is assumed to be triaxial or axisymmetric spheroid rotating about its axis of maximum moment of inertia and is forced to precess due to jets of ejected material. Randomly placed regions of exposed ice on the surface of the nucleus are assumed to produce gas and dust. The solution of the heat conduction equation for each active region is used to find the gas sublimation rate and the jet acceleration. Precession of the comet nucleus is followed numerically using a...
Topics: NASA Technical Reports Server (NTRS), COMET NUCLEI, CONDUCTIVE HEAT TRANSFER, MATHEMATICAL MODELS,...
162
162
Jul 26, 2010
07/10
by
Gary, J. Patric
texts
eye 162
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An overview is given of the user support services and network application development. The overview consists of the background, elements of NASA Science Internet (NSI) with GSFC responsibility, GSFC element objectives, and a summary of current status and plans. A conclusion of the overview is that refinement to the objectives and plans of the NSI elements under GSFC responsibility is ongoing and will continue to be influenced by user input/feedback through meetings with NSIUWG and user...
Topics: MATHEMATICAL MODELS, HIGH RESOLUTION, OPACITY, PRECESSION, SIZE DISTRIBUTION, MICROWAVES, RADIO...
Certain space shuttle missions may require the retrieval of passive spinning and processing satellites. One proposed means of retrieval utilizes a free-flying teleoperator launched from the shuttle. The feasibility of nulling the combined spin and precession (passivation) of a typical rigid satellite is first established using a Lagrangian formulation. It is shown that a proposed asymmetric teleoperator cannot be used for passivation in its present form because it would quickly tumble over...
Topics: NASA Technical Reports Server (NTRS), ANGULAR MOMENTUM, SPACE SHUTTLES, SPACECRAFT RECOVERY,...
The various estimates for the coupling mechanism by which precession transfers rotational, kinetic energy of earth into the energy of its magnetic field are generally considering hydromagnetic stresses that originate between mantle and core. Estimates of the energy of the geomagnetic field calculated from the data of spherical harmonic analysis derive precession energy values in reasonable agreement with the observed external energy of the geomagnetic field and with the rate of ohmic...
Topics: NASA Technical Reports Server (NTRS), ENERGY TRANSFER, ESTIMATES, GEOMAGNETISM, PRECESSION, EARTH...
The effect of post-Newtonian potentials on the rotation of a nearly rigid body is shown to consist of a precession and a torque. The frequency of the precession can be exactly represented by means of suitable differential operators. The relativistic torques in the quadrupole approximation depend on the instantaneous orientation of the principal axes of one body with respect to the position like the classical torque and velocity of the other. For a relatively low mass body, such as a gyroscope,...
Topics: NASA Technical Reports Server (NTRS), GRAVITATIONAL FIELDS, PRECESSION, RELATIVISTIC EFFECTS, RIGID...
