Results 31 to 40 of about 79,313 (301)

Studies on a Piezoelectric Cylindrical Transducer for Borehole Dipole Acoustic Measurements

Applied Sciences, 2021
In this article, a novel design of a piezoelectric dipole transducer is proposed for formation acoustic velocity measurement in the vicinity of a borehole with a frequency range of 0.4–6 kHz.
Yinqiu Zhou, Xiuming Wang, Yuyu Dai
doaj   +1 more source

Kaon-Nucleon Scattering Amplitudes and Z$^*$-Enhancements from Quark Born Diagrams [PDF]

, 1992
We derive closed form kaon-nucleon scattering amplitudes using the ``quark Born diagram" formalism, which describes the scattering as a single interaction (here the OGE spin-spin term) followed by quark line rearrangement.
A. Faessler, A.C. Davis, B. May, B.R. Baller, C. Roiesnel, C.B. Dover, C.E. DeTar, C.E. DeTar, C.J. Joachain, D. Mukhopadhyay, D.A. Liberman, E. S. Swanson, E.A. Veit, E.S. Swanson, G. Farrar, G.P. Lepage, H.J. Pirner, I. Bender, I. Bender, J. Weinstein, J. Weinstein, J. Weinstein, J. Weinstein, J.F. Gunion, J.S. Hyslop, K. Dooley, K. Hashimoto, K. Maltman, K. Nakajima, K. Shimizu, L.A. Copley, M. Aguilar Benitez, M. Oka, M. Oka, M. Oka, M. Oka, M.J. Corden, N. Isgur, P.D. Morley, P.M. Gensini, R. Büttgen, R. Koniuk, R.A. Arndt, R.E. Cutkosky, R.K. Campbell, R.K. Carnegie, R.L. Jaffe, R.L. Jaffe, R.L. Jaffe, R.W. Bland, R.W. Bland, S.A. Williams, S.J. Brodsky, S.J. Watts, T. Barnes, T. Barnes, T. Barnes, T. Barnes, T. Barnes, Y. Koike   +59 more
core   +2 more sources

Application of wavelet analysis in tool wear evaluation using image processing method [PDF]

, 2018
Tool wear plays a significant role for proper planning and control of machining parameters to maintain the product quality. However, existing tool wear monitoring methods using sensor signals still have limitations.
Lee, Woon Kiow, Ong, Pauline, Saleh, Aslinda, Sia, Chee Kiong, Talib, Norfazillah, Tuan Muda, Syed Mohamad Aiman   +5 more
core   +1 more source

Analysis of Bender Element signals during triaxial testing

Revista Facultad de Ingeniería Universidad de Antioquia, 2015
Este artículo presenta y discute tres métodos para evaluar la velocidad de la onda cortante, Vs, con base en el análisis de señales de “Bender Elements” (BE) tomadas durante ensayos triaxiales. Los métodos de tiempo de viaje de pico-a-pico (peak-to-peak travel time), correlación cruzada (cross-correlation) y fase retrasada (phase-delay) fueron ...
Kim, Taesik, Zapata-Medina, David Guillermo, Vega-Posada, Carlos Alberto   +2 more
openaire   +6 more sources

Geometric Optimisation of Hinge-less Deployment System for an Active Rotorblade [PDF]

, 2011
The Green Rotorcraft project (part of Clean Sky JTI) is\ud studying the Gurney flap as a demonstrator of a smart adaptive\ud rotorblade. Deployment systems for the Gurney flap need to\ud sustain large centrifugal loads and vibrations while maintaining ...
Akkerman, Remko, de Boer, Andries, Loendersloot, Richard, Paternoster, Alexandre, Sattelmayer, Thomas   +4 more
core   +3 more sources

EVALUATION OF DEFORMATION CHARACTERISTICS OF SOIL BY BENDER ELEMENT TEST

Doboku Gakkai Ronbunshu, 2003
ベンダーエレメント試験 (以下BE試験) の受信波によって, 土の減衰振動ならびに共振を観察することができるという仮定に基づき, 共振法土質試験の理論を援用して2通りの方法でせん断弾性係数および減衰比を求める手法を示している. 粘土, 泥炭試料についての実験結果からこれらの方法によって求めたせん断弾性係数の値は, せん断波の到達時刻を受信波のピーク点で定義した場合よりは (試料によって3～7倍) 大きな値となること, また, 減衰比についてはBE試験による既往の報告例はないが, 繰返し三軸試験によって従来報告されている値と近いことを示している. これらの結果をふまえ, 従来の方法に加えて本研究で提案する2通りの方法を併用することにより, BE試験の活用範囲がさらに広がることを示唆している.
Toshihiro OGINO, Toshiyuki MITACHI, Masaki TSUSHIMA, Hiroshi OIKAWA   +3 more
openaire   +2 more sources

The epochs of early-type galaxy formation as a function of environment [PDF]

, 2004
The aim of this paper is to set constraints of the epochs of early-type galaxy formation through the 'archaeology' of the stellar populations in local galaxies.
Aragon-Salamanca A., Arimoto N., Bender R., Bower R. G., Carollo C. M., Claudia Maraston, Claudia Mendes de Oliveira, Daddi E., Daniel Thomas, Davies R. L., de Freitas Pacheco J. A., Edmunds M. G., Fuhrmann K., Fusi-Pecci F., Fusi-Pecci F., Gorgas J., Greggio L., Greggio L., Jorgensen I., Kauffmann G., Kodama T., Longhetti M., Matteucci F., Matteucci F., Mehlert D., Pagel B. E. J., Ralf Bender, Reimers D., Renzini A., Saglia R. P., Surma P., Tantalo R., Ziegler B. L., Ziegler B. L.   +33 more
core   +1 more source

Dissipation boundaries for bender element experiments on geomaterials based on experimental and computational models

Transportation Engineering
The bender element (BE) test is widely employed in geotechnical engineering for measuring the shear wave velocity (Vs) and, consequently, the small-strain shear modulus (G0), due to its ease of application, integration into geotechnical devices, and ...
Ionuţ Dragoş Moldovan, Mohammad Jawed Roshan, Miguel Azenha, António Gomes Correia   +3 more
doaj   +1 more source

Local Stiffness Assessment of Geogrid-Stabilized Unbound Aggregates in a Large-Scale Testbed

Applied Sciences, 2023
This paper integrates and extends an earlier article presented at the 20th International Conference on Soil Mechanics and Geotechnical Engineering. The generation of a stiffened zone in the proximity of a geogrid is one of the primary mechanisms of ...
Mingu Kang, Han Wang, Issam I. A. Qamhia, Erol Tutumluer, Jeb S. Tingle   +4 more
doaj   +1 more source

Balmer and Metal Absorption Feature Gradients in M32 [PDF]

, 2004
Spectra from MDM Observatory are used to assess Lick/IDS feature strength gradients inside the half-light radius of the compact Local Group elliptical galaxy M32. All but a few (of 24 measured) indices show a statistically significant gradient. Comparing
Bender R., Bica E., Guy Worthey, Houdashelt M. L., Jones L. A., O’Connell R. W., Tantalo R.   +6 more
core   +2 more sources