Results 81 to 90 of about 39,462 (278)

Multi-color Cavity Metrology [PDF]

, 2012
Long baseline laser interferometers used for gravitational wave detection have proven to be very complicated to control. In order to have sufficient sensitivity to astrophysical gravitational waves, a set of multiple coupled optical cavities comprising ...
Adhikari, Rana X., Arai, Koji, Barr, Bryan, Betzwieser, Joseph, Brooks, Aidan, Dahl, Katrin, Doravari, Suresh, Driggers, Jennifer C., Izumi, Kiwamu, Korth, W. Zach, Miao, Haixing, Rollins, Jameson, Vass, Stephen, Yeaton-Massey, David   +13 more
core   +2 more sources

Nonlinear Response‐History Analyses of Masonry and Mixed Structures With HybriDFEM

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT The hybrid discrete‐finite element (HybriDFEM) method, previously developed to perform static and modal analysis in discrete and coupled discrete‐finite element models, is extended to nonlinear response‐history analyses. The equations of motion for the HybriDFEM model are solved through various numerical time‐integration schemes, both explicit
Igor Bouckaert, Michele Godio, João Pacheco de Almeida   +2 more
wiley   +1 more source

Dynamic Behavior of a Simple Rolling Seismic Isolator with a Position Restoring Device

Applied Sciences, 2018
Herein, the behavior of a rolling type seismic isolation system with a position restoring device (PRD) is investigated, for alleviating problems such as rapid convergence and position restoration.
Sung Chul Hong, Deog-Jae Hur
doaj   +1 more source

Three‐Dimensional Analytical Model of a Free‐Standing Square Rocking Column

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT A three‐dimensional analytical two‐degree‐of‐freedom (2DOF) model is developed to describe the bounded rocking response of free‐standing rigid square columns subjected to bidirectional seismic excitation. The formulation extends Housner's classical planar theory by deriving the full three‐dimensional equations of motion for a column ...
Dimitra Adamopoulou, Michalis F. Vassiliou   +1 more
wiley   +1 more source

Seismic qualification of crossover piping systems on a sodium-cooled fast reactor with a seismic isolation system

Mechanical Engineering Journal
A three-dimensional seismic isolation system has been developed for the conceptual design of a sodium-cooled fast reactor (SFR) in Japan. Between the reactor building equipped with the isolation system and the turbine building with no isolation system ...
Tomoyoshi WATAKABE, Takahiro OKUDA, Satoshi OKAJIMA   +2 more
doaj   +1 more source

The status of GEO 600 [PDF]

, 2004
The GEO 600 laser interferometer with 600m armlength is part of a worldwide network of gravitational wave detectors. GEO 600 is unique in having advanced multiple pendulum suspensions with a monolithic last stage and in employing a signal recycled ...
Allen, B., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., Barr, B.W., Berukoff, S., Bunkowski, A., Cagnoli, Gianpietro, Cantley, C.A., Casey, M.M., Chelkowski, S., Churches, D., Cokelaer, T., Colacino, C.N., Crooks, David R., Cutler, C., Danzmann, Karsten, Davies, R., Dupuis, Rejean J., Elliffe, E., Fallnich, Carsten, Franzen, A., Freise, A., Gossler, S., Grant, A., Grote, H., Grunewald, S., Harms, J., Heinzel, Gerhard, Heng, Ik S., Hepstonstall, A., Heurs, Michèle, Hewitson, M., Hild, S., Hough, James, Hough, James, Huttner, S.H., Itoh, Y., Jones, R., Kawabe, K., Killow, Christian, Koetter, K., Krishnan, B., Leonhardt, V., Lück, Harald, Machenschalk, B., Malec, M., Mercer, R.A., Messenger, Christopher, Mohanty, S., Mossavi, Kasem, Mukherjee, S., Murray, P., Nagano, S., Newton, G.P., Papa, M.A., Perreur-Lloyd, M., Pitkin, M., Plissi, M.V., Quetschke, V., Re, Virginia, Reid, S., Ribichini, L., Robertson, D.I., Robertson, Norna A., Romano, J.D., Rowan, Sheila, Ruediger, Albrecht, Sanders, Gary H., Sathyaprakash, Bangalore S., Schilling, R., Schnabel, R., Schutz, B.F., Seifert, F., Sintes, A.M., Smith, J.R., Sneddon, Peter H., Strain, Kenneth A., Taylor, I., Taylor, R., Thuering, A., Ungarelli, Carlo, Vahlbruch, H., Vecchio, Alberto, Veitch, J., Ward, Harry, Weiland, U., Welling, Herbert, Williams, P., Willke, Benno, Winkler, Walter, Woan, Graham, Zawischa, Ivo   +93 more
core   +4 more sources

A Multivariate Mixed‐Effects Regression Framework for Ground Motion Modeling: Integrating Parametric and Machine Learning Approaches

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Multivariate ground motion models (GMMs) that capture the correlation between different intensity measures (IMs) are essential for seismic risk assessment. Conventional GMMs are often developed using a two‐stage approach, where separate univariate models with predefined functional forms are fitted first, and correlation is addressed in a ...
Sayed Mohammad Sajad Hussaini, Shaghayegh Karimzadeh, Paulo B. Lourenço   +2 more
wiley   +1 more source

Improving the sensitivity of future GW observatories in the 1-10 Hz band: Newtonian and seismic noise [PDF]

, 2010
The next generation gravitational wave interferometric detectors will likely be underground detectors to extend the GW detection frequency band to frequencies below the Newtonian noise limit.
A. Stochino, Berger, C. M. van Leeuwen, D. S. Rabeling, E. Hennes, E. Kılıç, G. Cella, G. Cella, H. Grote, J. F. J. van den Brand, J. Harms, J.A. Noble, K.S. Thorne, M. Beccaria, M. Bour, M. Doets, M. G. Beker, M. Ohashi, P. Saulson, P.R. Saulson, R. DeSalvo, S. Braccini, S.A. Hughes, S.E. Hough, T. Creighton, V. Mandic   +25 more
core   +6 more sources

Research on the Laws of Destructive Patterns and Control Measures of Overlying Rock in High‐Efficiency Large‐Scale Mining Faces

Energy Science &Engineering, EarlyView.
With the advancement of coal mining technology driving the development of working faces toward increased mining heights and extended lengths, the enlargement of face dimensions has led to expanded overlying strata failure zones and intensified ground pressure manifestations. Consequently, traditional methods for determining hydraulic support resistance
Chen Gong, Peilin Gong, Kang Yi, Kaijie Duan, Lizhu Liu, Peng Li   +5 more
wiley   +1 more source

Study on Typical Seismic Mitigation and Isolation Devices for High-speed Railway Bridges and Its Seismic Mitigation and Isolation Efficiency

机车电传动, 2017
Necessity and principle of seismic mitigation and isolation design for high-speed railway bridges were expounded, and the norms and standards of seismic mitigation and isolation design both in domestic and overseas industry as well as its most popular ...
NING Xiangliang, XIA Junyong, BU Jiling, TANG Lu, LIU Jun   +4 more
doaj