Author: Anderson, Brian

Brian Anderson presents his stuff at the 1997 Global Sciences Congress; January, Tampa, Florida.

Pages:
Item # DVD020407
PRICE: $19.95

Author: Andrews, Rev. John

Excellent work describing the construction and function of an articulated pendulum and how it creates uniform complex motions when drawing magnificently beautiful waveforms. The basis of which are music ratios - fully explained and graphically demonstrated. A chord of music notes can and does form mathematically correct waveforms. This device was very "in" during the 1880s and 1890s. Explains very well the numerical relations of vibrations. The Pendulograph is the same as the Harmonograph. 8.5" X 11"

Pages: 49
Item # B0011488
PRICE: $8.95

Author: Anonymous

Part 1 The invention uses a special hemispherical-shape disk made out of piezo-electric material recently developed. One of the faces of the ceramic piezo-electric disk has been chemically reduced during the forming of the ceramic. This reduction imparts the hemispheric shape to the disk when the disk is at rest, i.e. when no electric input is supplied. Application of an electric input causes an electric field between the faces of the disk, and in response the hemispherical shape of the disk changes. Depending on the polarity of the applied electric field the hemispherical shape either flattens or heightens. Part 2 of the invention is a new type Sterling cycle refrigerator. Sterling-cycle refrigerators operate on a closed thermodynamic regenerative cycle with isothermal compression and expansion of the working fluid at different temperature levels. As an integral part of Sterling-cycle cryogenic refrigerators pump devices are needed. The new piezo-electric pump device of part 1 of the invention is used in the new refrigerator as a high-performance compressor and expander pump. To further improve the new refrigerator performance, the invention also features a displacement boost transfer pump to optimise heat exchanger performance. External inputs to the displacement pump are used to control whether at any one time laminar or turbulent flow exists in the heat exchangers for additional improved heat exchanger performance. NASA Tech Brief. 8.5" x 11"

Pages: 9
Item # P0005195
PRICE: $1.75

Author: Barmatz, Martin B., Iny, Ofer

A method of measuring the quality factor (Q) and frequency of resonance (fr) of a microwave cavity exploits the two inflection points of the power vs. frequency resonance curve of the cavity. NASA Tech Brief. 8.5" x 11"

Pages: 10
Item # N0002296
PRICE: $2

Author: Barmatz, Martin B., Iny, Ofer

An alternative method of measuring the quality factor (Q) and frequency of resonance (fr) of a microwave cavity involves a combination of (1) feedback control to maintain the frequency of the electromagnetic field at fr and (2) periodically determining Q from the rate of decay of the field when the source of microwave power is suddenly turned off. NASA Tech Brief. 8.5" x 11"

Pages: 11
Item # N0003296
PRICE: $2

Author: Bayard, David; Boussalis, Dhemetrios

A report presents a study on the use of a recently developed zero-anihilation periodic (ZAP) controller for active suppression of vibrations in flexible structures characterized by non-minimum-phase transfer functions. NASA Tech Brief. 8.5" X 11"

Pages: 25
Item # N0005296
PRICE: $3.75

Author: Brewer, DD, Rev. E. Cobham

Reprint of the original 1885 edition. Covers the basics: Cause, Quality, Transmission and Velocity of Sound, Numerical valuation, Vibrating Musical Instruments, Wind Instruments, Practical Acoustics, Echo, Voice and Hearing. 8.5" X 11"

Pages: 98
Item # P0421192
PRICE: $8.95

Author: Cantrell, John

A broadband capacitive electrostatic acoustic transducer has been developed for use in a liquid environments at megahertz frequencies. NASA Tech Brief. 8.5" x 11"

Pages: 12
Item # N0241192
PRICE: $1.8

Author: Choudhury, Dengler, Oswald, Siegel & Raisanen

A novel variation of a split-waveguide mount for millimeter- and submillimeter-wavelength multipliers and harmonic mixers has been developed. The mount was designed to offer a wide range of available matching impedances, while maintaining a relatively simple fabrication sequence. NASA Tech Brief. 8.5" x 11"

Pages: 18
Item # N0002396
PRICE: $2.15

Author: Craig, Avinash O.

A broadband differential optical Interferometer which uses an optical fiber waveguide to transmit coherent light to a surface under inspection is discussed. NASA Tech Brief. 8.5" x 11"

Pages: 20
Item # N0301192
PRICE: $2.5

Author: Cussack, J. A.

The generation of a 361 MHz signal from a crystal oscillator was necessary for the first local oscillator injection for the Viking 1975 Orbiter Relay Radio Receiver. Alternative methods of generation of this 361 MHz signal include three active (transistor) doublers in cascade. However, this method normally requires higher current drain and, since it employs more components, particularly active components, is often not too reliable. Therefore, a step recovery diode, driven by a 45 MHz amplifier, was used for the X8 frequency multiplication. NASA Tech Brief. 8.5" x 11"

Pages: 6
Item # N0201192
PRICE: $1.15

Author: Deschanel, A. Privat & Everett, J. D.

Reprint from the original 1882 edition. Excellent book. Profusely illustrated. Covers: Acoustics, Numeric Valuation, Modes of Vibration, Analysis of Sound, Consonance, Dissonance and Resultant Tones, Propagation of Light, Reflection, Refraction, Lenses, Optical Instruments, Spectra, Color, Wave Theory and Polarization. One of the best foundation texts on sound and vibration basics. 8.5" X 11"

Pages: 148
Item # B0431192
PRICE: $15.95

Author: Dick, G.J., Santiago, David G., Prata, Aluizio

A small sapphire tuning wedge device is used in a technique for solving a mode-purity problem associated with a sapphire dielectric-ring resonator that is part of a cryogenic microwave frequency discriminator. Such a resonator is typically used to stabilize the frequency and ensure the spectral purity of a microwave signal generator by frequency multiplication from a 5-MHz quartz-crystal oscillator. NASA Tech Brief. 8.5" x 11"

Pages: 21
Item # N0001296
PRICE: $3.25

Author: Dickson, J. D. Hamilton

Very interesting paper on the phenomena of measuring temperatures as a function of electrical resistance of platinum that changes with temperature. Reminds one of some of Keely's laws of vibration. Originally published in 1898 and includes another article: "The Thermo-Electric Diagram from -200° C. to 100° C. Deduced from the Observations of Professors Dewar and Fleming." by the same author. These papers are important in the study of Keely's gold, silver and platinum wires.

Pages: 12
Item # P0161194
PRICE: $1.5

Author: Ellison & Kohuth

This project is Phase I in the development of a new type of Stirling crycooler which can directly convey refrigeration through an external transfer loop to detached loads. This will allow separating the devices requiring cooling away from the refrigerator without the thermo-fluid losses of an intermediate heat exchanger between the crycooler and the cooling transfer loop or the need for a separate pump to circulate cryogenic fluid through the loop. NASA Tech Brief. 8.5" x 11"

Pages: 42
Item # N0011195
PRICE: $4

Author: Engel, Alexander

An odd-number frequency divider is quickly built from just a few digital integrated circuits. The output of the divider is the input frequency divided by 2n-1, where n can be any integer. NASA Tech Brief. 8.5" x 11"

Pages: 8
Item # N0191192
PRICE: $1.35

Author: Gammell, P. M.

High spatial resolution is obtained from reflected or transmitted ultrasonic pulses by an analog technique that produces a signal proportional to the magnitude of the complex-plane analytic representation of the signal. NASA Tech Brief. 8.5" x 11"

Pages: 21
Item # N0091192
PRICE: $2.5

Author: Gammell, Paul M.

Research on the frequency dependence of ultrasonic properties of tissue and of materials is often done by using sweep generators or spectrum analyzers. Much of the expense and complications of these instruments is eliminated by a system that utilizes the natural ringing frequency of an electronic circuit coupled to a wideband transducer. NASA Tech Brief. 8.5" X 11"

Pages: 9
Item # N0141192
PRICE: $1.35

Author: Gammell, Paul M.

A proposed method for grading beef quality uses ultrasonic inspection. In the method, the grade of beef carcasses is determined by analysis of the ultrasonic A-scan signatures from the marbling within the muscle. NASA Tech Brief. 8.5" x 11"

Pages: 21
Item # N0151192
PRICE: $2.5

Author: Goold, Benham, Kerr & Wilberforce

This interesting text covers the work in penduluum and plate vibrations, harmonographs, vortex plates, synchronous penduluums, geometric pen, synchronous springs, Benham's Triple Penduluum, sympathetic oscillations and harmonic vibrations. It further covers hardware construction, function and operation and has a number of beautiful harmonograph drawings nearly identical to pendulograph images. Reprint of the original 1909 text. Wire bound 8.5" x 11"

Pages: 218
Item # B20041
PRICE: $24.95

Author: Gupta, K. K.

A unified numerical algorithm efficiently solves free-vibration problems of stationary or spinning structures with or without viscous or structural clamping. The algorithm can be used to solve static problems involving multiple loads and to solve the quadratic matrix eigenvalue problems associated with a finite-dynamic-element structural discretization. NASA Tech Brief. 8.5" X 11"

Pages: 25
Item # N0111192
PRICE: $3

Author: Heyman, Joseph S.

A new acoustoelectric transducer (AET) has been developed which s phase insensitive. Comparative data obtained with both conventional and AET transducers are presented and discussed. The AET is shown to produce more accurate measurements for the cases investigated. NASA Tech Brief. 8.5" x 11"

Pages: 27
Item # N0161192
PRICE: $3

Author: Hoppe, D.

A computer program calculates scattering matrices for circular waveguides that include step discontinuities between colinear sections of different radii. The radius and length of each section can be specified arbitrarily. NASA Tech Brief. 8.5" x 11"

Pages: 44
Item # N0002592
PRICE: $5.95

Author: Hughes, Margaret Watts

"The peculiar forms shown in the illustrations of this article and which I call Voice-Figures, have excited much interest since their recent discovery, exhibited in London, England, at the rooms of the Musical Association, the Royal Institution, The Royal Society and elsewhere."An excellent paper, with plates, revealing how a very simple easy-to-make device shows how sound and vibrations can be made visible by forming beautiful geometric patterns in lycopodium dust or similar light-weight powders. Hans Jenny used these techniques to create his now famous films about cymatics. From Century Magazine, May, 1891. 8.5" X 11"

Pages: 8
Item # P0023488
PRICE: $4.95

Author: Hughes, Margaret Watts

Digital version of the hardcopy edition. eBook, pdf format. Viewable with Adobe Acrobat. Password and access information emailed to you when payment received.

Pages: 8
Item # pdf23488
PRICE: $2.5

Author: Imbriale, William A.

A proposed all-metal low-pass dichroic microwave reflector. The reflector would be a moderately thick metal plate containing a periodic pattern of resonant slots that would make the plate effectively transparent at the frequency of resonance. NASA Tech Brief. 8.5" x 11"

Pages: 4
Item # N0001896
PRICE: $.95

Author: Javadi, Hamid H.

Two distinct electrical switching phenomena have been observed in experiments on a commercial silver-filled epoxy. Depending on the geometry of an epoxy layer or strip and of metal electrical contacts, there is either (1) a transition from an "off" (high-resistance) state at low applied electric field to an "on" (low-resistance) state at high applied electric field; or (2) a transition from "on" (low resistance) at low applied electric field to "off" (high resistance) at high applied electric field. NASA Tech Brief. 8.5" x 11"

Pages: 44
Item # N0002896
PRICE: $4.95

Author: Johnson, Bruce; Flynn, Frederick; Gaffney, Monique

A report presents the results of early research directed toward the development of active control systems for the suppression of vibrations in spacecraft Stirling-cycle crycoolers. The dominant source of vibrations in such a crycooler is its compressor, which contains a piston driven by a linear motor, typically at a frequency between 40 and 60 Hz. NASA Tech Brief. 8.5" x 11"

Pages: 21
Item # N0004296
PRICE: $3

Author: Kautz, Harold E.

The investigation employs the acousto-ultrasonic configuration with broadband sending and receiving transducers for producing and detecting ultrasonic waves. With the acousto-ultrasonic methods it is possible to observe discrete pulses in the signal. The ultrasonic velocities of these pulses proved sensitive to variations in stiffness modulus and fiber/matrix interfacial shear strength in ceramic matrix composites. There is a need to clarify the nature of Lamb wave modes and to show how they can be used to assess material properties and boundary conditions. It is hoped to thereby demonstrate a method for monitoring mechanical properties of composites. NASA Tech Brief. 8.5" x 11"

Pages: 23
Item # P0012395
PRICE: $2.5

Author: Kendall, Jr., J. M.

A novel acoustic lens is fabricated by clamping together two membranes of thin plastic and filling the enclosed space with a flourocarbon gas. In tests, the lens substantially improved the accuracy of sound "maps" of turbulent airflow. It could be used to record sound-intensity patterns in the design of speakers, lecture halls, and auditoriums. NASA Tech Brief. 8.5" x 11"

Pages: 7
Item # N0221192
PRICE: $1.25

Author: Lakhovsky, George

A rare book about Lakhovsky's fabled work with rays if vibrations and their effects on living organisms. Covers instrumentation, well researched, illustrated. 8 1/2" X 11" Reprint of the original 1939 edition.

Pages: 54
Item # B1599
PRICE: $14.95

Author: Levy, R.

Post-processing algorithms are given to compute the vibratory elastic-rigid coupling matrices and the modal contributions to the rigid-body mass matrices and to the effective modal inertias and masses. Recomputation of the elastic-rigid coupling matrices for a change in origin is also described. A computational example is included. The algorithms can all be executed by using standard finite-element program eigenvalue analysis output with no changes to existing code or source programs. NASA Tech Brief. 8.5" x 11"

Pages: 10
Item # N0041293
PRICE: $1.5

Author: Lissant, Lia

Lia Lissant's fascinating presentation of a new kind of oscillator. Audio Tape from the 2nd Keely Symposium, Colorado Springs.

Pages: 0
Item # S2AT0019
PRICE: $10

Author: Lissant, Lia

Audio Tape. Exquisite music produced by Lia Lissant. Estatic Bach is inspired by Keely's original and pioneering work and Dale Pond's research in sound and vibration. Very inspiring and moving piece reminding one of molecules and atoms in motion. It inspires me every time I hear it. Lia has done a magnificent work.The second piece demonstrates the correct way to sound Sanskrit vowels. Properly pronounced these tones have important effects on our psychology, emotions and spiritual growth and development. One of a kind tape and a must have if you are into music or sound therapies or applied vibration technology. Also available on CD #CD1797.

Pages: 0
Item # AT01797
PRICE: $10

Author: Lissant, Lia

CD. Exquisite music produced by Lia Lissant. Estatic Bach is inspired by Keely's original and pioneering work and Dale Pond's research in sound and vibration. Very inspiring and moving piece reminding one of molecules and atoms in motion. It inspires me every time I hear it. Lia has done a magnificent work.The second piece demonstrates the correct way to sound Sanskrit vowels. Properly pronounced these tones have important effects on our psychology, emotions and spiritual growth and development. One of a kind recording and a must have if you are into music or sound therapies or applied vibration technology. Also available in audio tape #AT01797.

Pages: 0
Item # CD1797
PRICE: $10

Author: Logan, Jr., Robert T.

A novel photonic oscillator is being developed to serve as an ultrastable source of microwave and millimeter wave signals. In this system, the oscillations would be generated photonically, then converted to electronic form. NASA Tech Brief. 8.5" x 11"

Pages: 10
Item # N0001596
PRICE: $1.5

Author: NASA

The invention relates generally to interferometers and more specifically concerns a dual differential Interferometer that measures both the amplitude and orientation of propagating, broadband ultrasonic surface acoustic waves. NASA Tech Brief. 8.5" x 11"

Pages: 8
Item # N0081192
PRICE: $1.35

Author: NASA

Simultaneous specifications of wide output deviations and good long term center frequency stability of a VCO prove difficult to meet. This paper presents an AFC loop which will permit meeting the requirements simultaneously. NASA Tech Brief. 8.5" x 11"

Pages: 32
Item # N0121192
PRICE: $2.95

Author: NASA

The invention relates generally to circuits for attenuating background noise signals and more particularly to an artifact signal attenuator circuit for a pulse rate sensor. NASA Tech Brief. 8.5" x 11"

Pages: 12
Item # N0131192
PRICE: $1.8

Author: NASA

In response to control signals, an oscillator originally developed for use aboard the Space Shuttle generates selectable frequency outputs of either square-wave, sine-wave, or triangular-wave shape. The output waveform always starts at zero phase, with tight tolerance in amplitude and frequency. NASA Tech Brief. 8.5" X 11"

Pages: 11
Item # N0211192
PRICE: $1.65

Author: NASA

Acoustic sensors and other transducers must often be precisely positioned to insure their proper operation and to prevent them from interfering with surrounding structures. An adjustable holder developed for the acoustic sensors on the Space Shuttle could also be used to install transducers and monitoring instruments in other applications. NASA Tech Brief. 8.5" x 11"

Pages: 9
Item # N0231192
PRICE: $1.45

Author: NASA

A method of predicting strain using a modal model derived from test data is presented. A modal test is performed, and frequency response functions are collected from accelerometers and strain gages. A combined modal model is extracted in which the eigenvectors included both displacement and strain mode shape coefficients. NASA Tech Brief. 8.5" x 11"

Pages: 8
Item # N0291192
PRICE: $1.35

Author: NASA

The transducer characterization problem has been resolved through real-time acquisition of data and data processing of permanently stored data. The entire process is software managed. Hardware configuration if shown. Software has been divided into two tasks. These are data acquisition and data processing. This transducer characterization program is in an operative state. NASA Tech Brief. 8.5" x 11"

Pages: 363
Item # N0331192
PRICE: $39.95

Author: NASA

In the present invention, the regenerator and the acceptor and rejector heat exchangers are reconfigured so that the gas flows through the regenerator in the radial direction. As a consequence, the regenerator isotherms are ideally in the form of concentric cylinders rather than axially spaced disks; and the temperature gradient is across the regenerator radially rather than axially. NASA Tech Brief. 8.5" X 11"

Pages: 9
Item # N0071293
PRICE: $1.35

Author: NASA

A solid state pump has been designed to pump materials without using any conventional moving parts. The pump uses acoustic radiation forces to input a momentum transfer resulting in flow of the material. It can be entirely miniaturized, does not invade the pumped environment, and is silent with no conventional vibration. NASA Tech Brief. 8.5" X 11"

Pages: 13
Item # N0061293
PRICE: $1.45

Author: NASA

A high frequency time-gain compensation circuit was designed and built for a wide variety of applications in nondestructive evaluation and ultrasonic measurements. The circuit features a high signal to noise ratio, a wide signal bandwidth (in excess of 50 MHz), and a large dynamic range (greater than 50 dB). The control bandwidth of 5 MHz assures accuracy to the control signal.

Pages: 5
Item # N010207
PRICE: $.75

Author: Norton, Sidney A.

Reprint of chapters 5, 6 and 7 covering all aspects of undulations, sound & vibrations and music construction, from this 1870s tome on science and physics. These are the kinds of materials Keely read which eventually led to his discoveries and science. 8.5" x 11"

Pages: 45
Item # P12041
PRICE: $9.95

Author: Pickett, H. M.

A millimeter-wave feed horn exhibits nearly equal beam-intensity patterns in the E and H-planes as well as low side-lobe levels. The horn includes a circular waveguide, a step transition, and a conical section. NASA Tech Brief. 8.5" x 11"

Pages: 11
Item # N0311192
PRICE: $1.65

Author: Pond, Dale

HyperCard stack containing graphics, text and calculations for music, scales, chords, concord, discord, vibration basics and much more. A bird's-eye-view of SVP. An easy way of viewing and understanding what SVP is all about. Requires HyperCard 2.* Extensively illustrated.

Pages:
Item # C0021192
PRICE: $24.95

Author: Reinhardt, Victor

A maser functioning as a frequency standard stable to one part in 10-14 includes a variable volume, constant surface area storage bulb having a fixed volume portion located in a resonant cavity from which the frequency standard is derived. NASA Tech Brief. 8.5" x 11"

Pages: 26
Item # N0271192
PRICE: $3

Author: Salikuddin, M.

A method has been presented for measuring the acoustic properties of an absorbent material and a duct/nozzle system (with or without airflow) using a high voltage spark discharge as an impulse source of sound. NASA Tech Brief. 8.5" x 11"

Pages: 40
Item # N0181192
PRICE: $4

Author: Schindler, R. A.

The novelty of the innovation lies in the new combination of elements defining a scanning Fourier interference spectrometer, and more specifically to the addition of multiplier means for eliminating scan velocity effects from the signal. NASA Tech Brief. 8.5" X 11"

Pages: 4
Item # N0261192
PRICE: $.95

Author: Sydnor, R. L.

A resonant cavity would be adjusted in response to the phase difference between the signals in the E and H planes, according to a concept for hydrogen-maser tuning. NASA Tech Brief. 8.5" x 11"

Pages: 9
Item # N0031192
PRICE: $1.35

Author: Twyman, F. & Smith, D. M.

This book is an excellent compilation of sensitive lines and wavelengths, wave numbers and frequencies of many of the elements. When working with vibrations or designing any of the Keely devices or experiments these numbers are absolutely essential and nearly impossible to find elsewhere. According to Keely spectra numbers are more important to work with than atomic weights. A rare reprint of the original 1931 text. 8.5" X 11"

Pages: 98
Item # B0011195
PRICE: $14.95

Author: Udwadia, F. E.

An algorithm for controlling the reactions of buildings and other structures to earthquakes initiates counterpulses when incoming shock pulses exceed a threshold level. By using this "go/no-go" criterion rather than continuously adjusting the response to every input excitation no matter how small, the control system needs less computation effort than do comparable closed-loop systems. NASA Tech Brief. 8.5" x 11"

Pages: 15
Item # N0061192
PRICE: $2.25

Author: Vasquez, R. P.

The oxidation of semiconductors and high-temperature superconductors could be achieved at lower temperatures than in current fabrication processes by use of oxygen molecules or atoms that have been raised into specific excited states. The use of excited oxygen (or other species) is also of interest in research on the kinetics and mechanisms of chemical reactions. NASA Tech Brief. 8.5" x 11"

Pages: 5
Item # N0001592
PRICE: $1

Author: Wade, Janet

Acoustic emission in prestressed composite panels has been detected using embedded single mode optical fibers. Static loading of the composite matrix produces acoustic emission events, pulsed ultrasonic waves, which mechanically modulate the embedded fiber geometry and phase modulate the transmitted optical field. This modulation is detected by optical interferometry and Fourier optical processing techniques to produce an electronic signal proportional to acoustic field amplitude integrated along the length of the fiber in the specimen. NASA Tech Brief. 8.5" x 11"

Pages: 5
Item # N0071192
PRICE: $1