Results 241 to 250 of about 106,992 (298)

Revisiting the <i>J</i> = 1 ← 0 fundamental rotational transition of HHe⁺ with action spectroscopy.

Phys Chem Chem Phys
Asvany O, Graf UU, Silva WGDP, Schneider L, Kabanovic S, Ossenkopf-Okada V, Stutzki J, Savić I, Güsten R, Ricken O, Klein B, Schlemmer S.   +11 more
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Air column resonance demonstrations

The Journal of the Acoustical Society of America, 1998
An impedance head designed and constructed at the Physikalisch Technische Bundesanstalt in Braunschweig, Germany is used to illustrate the pattern of resonances in an air column confined to a cylindrical tube closed on one end and open on the other. This is compared to the pattern observed for a tube closed on both ends. The effect observed when adding
Uwe J. Hansen, Peter Hoekje
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Redesigned Air-Column Resonance Apparatus

The Physics Teacher, 2003
This paper describes a redesigned air-column resonance apparatus1 that offers several advantages over the traditional one.2 It does away with water or the long rod to vary the length of the air column. Instead a specially designed piston is moved inside a plastic or glass tube by external magnets to vary the length of the air column.
Gurbax Singh, Erlend H. Graf
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Parametric resonance of viscoelastic columns

International Journal of Solids and Structures, 1969
Abstract The results of an analytical and experimental investigation of the effect of viscoelastic material behavior on the instability regions of a column subjected to a periodic axial load P 0 + P 1 cos ωt are presented. The complex modulus representation is used for the material.
K.K. Stevens, R.M. Evan-Iwanowski
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Evaluation of Resonant Column Test Devices

Journal of the Geotechnical Engineering Division, 1976
Resonant column tests were performed by six participants in a program designed to evaluate results from various devices. The participants were Drnevich, Hardin, Woods, Shannon & Wilson, Inc., the U.S. Army Engineer Cold Regions Research and Engineering Laboratory, and the U.S. Army Engineer Waterways Experiment Station.
George R. Skoglund, Robert W. Cunny, William F. Marcuson   +2 more
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Resonant Column Testing of Agricultural Soils

Transactions of the ASAE, 1988
ABSTRACT REMOLDED cylindrical specimens and minimally-disturbed cylindrical samples of three types of agricultural soils were tested in a torsional-type resonant column device. The soils were tested at confining stresses close to zero to simulate field conditions.
null A. R. Womac, null F. D. Tompkins, null E. C. Drumm   +2 more
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New Approach to Resonant Column Testing

Geotechnical Testing Journal, 2013
Abstract This paper describes a new type of torsional resonant column device that has a quasi-fixed base and free top. In this device, a relatively rigid torque transducer is placed between the bottom platen and the fixed chamber base. A large capacity torque motor excites the top platen.
Salim K. Werden, Vincent P. Drnevich, John R. Hall, Chafik Hankour, Carolyn T. Conlee, W. Allen Marr   +5 more
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Parametric Resonances of Columns

2019
This chapter aims to give a general overview of the parametric resonances of columns under a harmonically pulsating force. In addition to simple resonance, combination resonances of sum and difference type are introduced, with columns having various kinds of boundary condition, other than pinned-pinned ends.
Yoshihiko Sugiyama, Mikael A. Langthjem, Kazuo Katayama   +2 more
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Pore Pressure Buildup in Resonant Column Tests

Journal of Geotechnical Engineering, 1984
Resonant column tests were performed on fully saturated and dry hollow cylindrical and fully saturated solid cylindrical specimens of Monterey No. 0 sand of 60% relative density subjected to 96 kPa confining pressure. The hollow specimens were tested by torsional excitation and the solid specimens by longitudinal excitation.
Riley M. Chung, Felix Y. Yokel, Herbert Wechsler   +2 more
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Parametric Resonances of Columns with Damping

2019
This chapter discusses the mathematical aspects of parametric resonances of columns with damping, dealing generally with dynamical systems with damping. In addition to the first-order approximation for the resonance boundaries of Mathieu-Hill equations, an approach to the second-order approximation is suggested.
Yoshihiko Sugiyama, Mikael A. Langthjem, Kazuo Katayama   +2 more
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