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Journal articles on the topic 'Critical response spectrum'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Kote, P. B., S. N. Madhekar, and I. D. Gupta. "Use of critical response spectrum for design of multi-story steel buildings under multi-component seismic excitation." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (2022): 749–58. http://dx.doi.org/10.38208/acp.v1.577.

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During an earthquake, buildings are simultaneously excited by three-components of ground motion (two horizontal and one vertical) orientations of which are not known apriori. To take account for the uncertainty in the direction of incidence of earthquake waves, a structure is required to be designed such that it is safe for all directions of incidence. For this purpose, the combined effects of two horizontal components of motion are commonly determined using simplified methods such as the percentage rules (e.g. 100%+30%, 100%+40%), square root of the sum of squares (SRSS) and Complete Quadrati

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2

Menun, Charles. "Strategies for Identifying Critical Seismic Response Combinations." Earthquake Spectra 20, no. 4 (2004): 1139–65. http://dx.doi.org/10.1193/1.1806148.

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The effects of multiple seismic responses acting simultaneously within a structural element must often be considered when checking the capacity of the element or determining its required dimensions or material properties. In particular, an element is viewed as being adequately designed if all combinations of the responses as they evolve during an earthquake remain in the safe region of the response space defined by the relevant capacity surface of the element. In this paper, algorithms are developed to facilitate the comparison of available response-spectrum-based envelopes to prescribed capac

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3

Chen, An-Jun. "The Shock Characteristics of Tilted Support Spring Packaging System with Critical Components." Shock and Vibration 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/496035.

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The nonlinear dynamical equations of tilted support spring packaging system with critical components were obtained under the action of half-sine pulse. To evaluate the shock characteristics of the critical components, a new concept of three-dimensional shock response spectrum was proposed. The ratio of the maximum shock response acceleration of the critical components to the peak pulse acceleration, the dimensionless pulse duration, and the frequency parameter ratio of system or the angle of tilted support spring system were three basic parameters of the three-dimensional shock response spectr

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4

Rajabi, Elham, and Gholamreza Ghodrati Amiri. "Generation of critical aftershocks using stochastic neural networks and wavelet packet transform." Journal of Vibration and Control 26, no. 5-6 (2019): 331–51. http://dx.doi.org/10.1177/1077546319879536.

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This paper proposes a methodology using wavelet packet transform, principal component analysis, and neural networks in order to generate artificial critical aftershock accelerograms which are compatible with the response spectra. This procedure uses the learning abilities of neural networks, principal component analysis as a dimension reduction technique, and decomposing capabilities of wavelet packet transform on consecutive earthquakes. In fact, the proposed methodology consists of two steps and expands the knowledge of the inverse mapping from mainshock response spectrum to aftershock respo

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5

Zhu, Ruiguang, Bohan Du, Yekai Yang, and Dagang Lu. "The Generation of the Target Aftershock Spectrum Based on the Conditional Mean Spectrum of Aftershocks." Buildings 13, no. 10 (2023): 2660. http://dx.doi.org/10.3390/buildings13102660.

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Numerous studies have examined the responses of various structures to the mainshock–aftershock (MS–AS) ground motion, and the MS–AS ground motions are very important as the input. Therefore, in the absence of aftershock information, it is particularly critical to construct a reasonable MS–AS seismic sequence. This paper aims to provide a new reasonable method for generating the target aftershock response spectrum, which can be used to select or artificially simulate aftershock ground motion, given the seismic information of the main shock. Firstly, the magnitude, fault size, and location of th

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6

Wang, Jun, Zhi-Wei Wang, Li-Xin Lu, Yong Zhu, and Yong-Guang Wang. "Three-Dimensional Shock Spectrum of Critical Component for Nonlinear Packaging System." Shock and Vibration 18, no. 3 (2011): 437–45. http://dx.doi.org/10.1155/2011/312063.

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To evaluate the shock characteristics of critical component for a nonlinear packaging system, a new concept of three-dimensional shock spectrum was proposed. Three key coordinate parameters, such as the nondimensional pulse duration, the frequency parameter ratio and the ratio of the maximum response acceleration to the peak pulse acceleration, were governed in a novel dynamical mathematical model. It is shown that the shock response of critical component is weakened owning to the decrease in the defined system parameter. Furthermore, at low frequency parameter ratio, the enhancement of the da

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7

Fokkema, Jacob T., and Anton Ziolkowski. "The critical reflection theorem." GEOPHYSICS 52, no. 7 (1987): 965–72. http://dx.doi.org/10.1190/1.1442365.

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In predictive deconvolution of seismic data, it is assumed that the response of the earth is white. Any nonwhite components are presumed to be caused by the source wavelet or by unwanted multiples. We show that this whiteness assumption is invalid at precritical incidence. We consider plane waves incident on a layered acoustic half‐space. At exactly critical incidence at any interface in the half‐space, the lower layer acts similar to a rigid plate. The response of the half‐space is then all‐pass, or white. This result we call the critical reflection theorem. The response is also white if the

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8

Vaishali, Nagpure. "Automating Spectrum Sharing in Emergency Response: A Predictive Modeling Approach." International Journal of Innovative Research in Engineering & Multidisciplinary Physical Sciences 10, no. 2 (2022): 1–6. https://doi.org/10.5281/zenodo.14208892.

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This case study explores the application of statistical models for automating public safety spectrum sharing during emergency situations, focusing on enhancing communication efficiency among first responders. Given the increasing complexity of incidents such as natural disasters, effective spectrum management is crucial for ensuring reliable access to communication resources. We developed a predictive model using time-series analysis and multiple linear regression to assess historical spectrum usage and contextual factors, including incident types and weather conditions. By predicting spectrum

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9

Lewandowska-Pietruszka, Zuzanna Sara, Magdalena Figlerowicz, Gabriela Stępień, and Katarzyna Mazur-Melewska. "The traumatic stress response in children with autism spectrum disorder – a case series." Pediatria i Medycyna Rodzinna 21, no. 2 (2025): 146–53. https://doi.org/10.15557/pimr.2025.0021.

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Research on traumatic stress in children with autism spectrum disorder is limited, but up to 17% may meet post-traumatic stress disorder criteria. While it remains uncertain whether they are more susceptible to psychological trauma, factors such as communication deficits, atypical emotional processing, and biological stress response differences may heighten their vulnerability. This study explores the risk of trauma among children with autism spectrum disorder resulting from war or extended hospitalisation, aiming to deepen understanding and guide future research. Presenting a case series of f

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10

Niranjani, E., and K. Aravinthan. "Design of Base Isolated School Building with Elastomeric Bearing." Asian Review of Civil Engineering 3, no. 2 (2014): 19–26. http://dx.doi.org/10.51983/tarce-2014.3.2.2207.

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In this paper, a school building which is to be located in Coimbatore region is taken. A four storied (G+3) school building having plan dimension of 16m x 54m is considered. The structure is modeled as single degree of freedom. The analysis of the structure is made by linear dynamic response spectrum method and the dynamic responses are found. From linear response spectrum analysis used in this study, the total base shear forces and storey shear forces in the columns and the absolute and relative storey drifts are found and the column having critical value is found judicially. Elastomeric bear

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11

Erduran, Emrah, and Conrad Lindholm. "A Critical Look at the Use of Design Spectrum Shape for Seismic Risk Assessment." Earthquake Spectra 28, no. 4 (2012): 1711–21. http://dx.doi.org/10.1193/1.4000086.

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The effects of using design spectrum shape over actual response spectra on earthquake damage estimates has been investigated. A series of numerical simulations were conducted to estimate the expected damage. The simulations were conducted with four different spectral shapes, two different ground-motion prediction equations (GMPEs) and three different soil classes. As a result of the numerical simulations, it was observed that the use of design spectrum shape leads to over- or underestimation of damage estimates relative to those obtained from the actual spectrum computed using GMPE. The damage

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12

Wang, Lin Ge, Hai Tao Zhou, and Yi Zhe Zhou. "The Spectrum Characteristic Analysis on Double-Layer Kewitte Latticed Shell." Advanced Materials Research 197-198 (February 2011): 682–87. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.682.

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This paper demonstrates the natural frequency varying rule with differently critical design parameters for the free vibration characteristics and change features of structural response with different geometric parameters under the simple harmonic excitation.

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13

A.M. Chandler, Nelson Lam, John Wilson, and G.L. Hutchinson. "Response spectrum modelling for regions lacking earthquake records." Electronic Journal of Structural Engineering 1, no. 1 (2001): 60–73. http://dx.doi.org/10.56748/ejse.1151.

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The design response spectrum is typically the starting point of most codified seismic design and assessment procedures and is predominantly used to prescribe the applied inertia forces induced by earthquake ground motions. In a recent paper, the authors presented and discussed the key properties, limitations, engineering interpretation and modern concepts relating to various types of earthquake design response spectra, including the acceleration, displacement and velocity spectra. The present paper provides a critical evaluation of the various deterministic and probabilistic approaches to resp

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14

Miao, Huilei, Wen Gao, and Xinxin Cao. "Clinical Spectrum and Outcome of Kidney Involvement in Non-Langerhans Histiocytosis." Blood 144, Supplement 1 (2024): 6658. https://doi.org/10.1182/blood-2024-194794.

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Objective: To describe the clinical features and treatment response of Rosai-Dorfman disease (RDD) and Erdheim-Chester disease (ECD) with kidney involvement. Methods: We conducted a retrospective analysis of patients with RDD and ECD who had kidney involvement between January 2005 and December 2023. We evaluated the kidney response based on kidney function, computed tomography (CT) response and metabolic responses. Results: A total of 4 RDD patients and 44 ECD patients were included, with a median age of 58 (36-68) and 51(18-66) years, respectively. None of the RDD patients had kidney-associat

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15

Коверда, В. П., та В. Н. Скоков. "Резонансный отклик масштабно-инвариантных функций случайного процесса с турбулентным спектром". Письма в журнал технической физики 47, № 13 (2021): 36. http://dx.doi.org/10.21883/pjtf.2021.13.51120.18774.

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Scale-invariant random processes with large fluctuations are modeled by a system of two stochastic nonlinear differential equations describing interacting phase transitions. It is shown that under the action of white noise, a critical state arises, characterized by a turbulent spectrum and a scale-invariant distribution function. The critical state corresponds to the maximum entropy, which indicates the stability of the process. An external harmonic action on a random process with a turbulent spectrum gives rise to a resonant response of scale-invariant functions.

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16

Kokot, Seweryn. "Reinforced Concrete Beam under Support Removal—Parametric Analysis." Materials 14, no. 20 (2021): 5917. http://dx.doi.org/10.3390/ma14205917.

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This paper investigates the behaviour of a reinforced concrete beam under a support removal. A detailed parametric analysis is carried out, covering the effect of support removal rate on dynamic response. The linear elastic and nonlinear inelastic responses are computed and studied in detail. Critical parameters during the structural response are identified. In order to determine the ultimate load, the vertical pushover analysis is performed. The key parameters driving the beam response are assumed as random variables, and respective reliability study makes it possible to check the overall unc

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17

Plyukhin, Alex V. "Nonergodic Brownian oscillator: low-frequency response." Journal of Statistical Mechanics: Theory and Experiment 2023, no. 6 (2023): 063207. http://dx.doi.org/10.1088/1742-5468/acdce9.

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Abstract An undisturbed Brownian oscillator may not reach thermal equilibrium with the thermal bath due to the formation of a localized normal mode. The latter may emerge when the spectrum of the thermal bath has a finite upper bound ω 0 and the oscillator natural frequency exceeds a critical value ω c , which depends on the specific form of the bath spectrum. We consider the response of the oscillator with and without a localized mode to the external periodic force with frequency Ω lower than ω 0. The results complement those obtained earlier for the high-frequency response at Ω ⩾ ω 0 and req

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18

Rezaei, Mohsen, Md Hosne Mobarak Shamim, Mohammed El Amraoui, Younes Messaddeq, and Martin Rochette. "Nonlinear Optical Fiber Couplers Made of Chalcogenide Glass." EPJ Web of Conferences 266 (2022): 11010. http://dx.doi.org/10.1051/epjconf/202226611010.

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We demonstrate chalcogenide optical fiber couplers designed with a transmission spectrum response that varies with input power. The measured critical power is as low as 126 W at a wavelength of 1938 nm.

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19

Li, Furong, and Guoxing Chen. "Nonlinear Seismic Response Characteristics of CAP1400 Nuclear Island Structure on Soft Rock Sites." Science and Technology of Nuclear Installations 2020 (September 22, 2020): 1–17. http://dx.doi.org/10.1155/2020/8867026.

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CAP1400 nuclear island structure is an advanced and novel nuclear power plant structure. In order to explore the seismic response characteristics of CAP1400 nuclear island structure on soft rock sites, a three-dimensional refined nonlinear seismic response analysis model was established for a soft rock foundation-nuclear island structure system using ABAQUS software. The influences of the input ground motion intensity and the frequency spectrum characteristics on the acceleration, relative displacement, and floor response spectrum, as well as the critical shear wave velocity of nonbedrock site

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20

Zhou, Chang Xian, and Shao Peng Zheng. "Application of Earthquake Response Spectrum in the Ultra-High-Rise Building Design." Applied Mechanics and Materials 644-650 (September 2014): 5081–84. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.5081.

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The design of ground motion, including the response spectrum design and seismic wave design, is one of the important parameters for aseismic design of building structures. Consequently, the reasonable design of ground motion has a critical influence on the aseismic design of building structures. Given the importance of high-rise buildings, site survey data are generally in great detail. In this case, making full use of the data and reasonably designing response spectra and seismic design are more appropriate to the characteristics of specific sites of high-rise buildings than determining seism

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21

Su, Qingshuang, Yinfeng Dong, Feiyu Guo, and Xingyu Zhang. "Characteristic period of response spectrum for surface and borehole ground motions." Vibroengineering Procedia 53 (November 27, 2023): 13–19. http://dx.doi.org/10.21595/vp.2023.23734.

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Determining the characteristic period of ground motions (Tg) is an essential step in the seismic design of structures, but a critical problem that needs to be solved is figuring out how to do so when bedrock ground motion is utilized as an input. In this paper, the relationship between surface and borehole temperature data is investigated, and the main factors affecting the Tg are analyzed. Then, the algorithm for predicting Tg is presented. It is found that two factors, i.e., peak ground acceleration (PGA) and fault distance have significant effects on the value of Tg. By comparing the values

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22

Ramirez, Oscar M., Michael C. Constantinou, Andrew S. Whittaker, Charles A. Kircher, and Christis Z. Chrysostomou. "Elastic and Inelastic Seismic Response of Buildings with Damping Systems." Earthquake Spectra 18, no. 3 (2002): 531–47. http://dx.doi.org/10.1193/1.1509762.

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The effect of damping on the response of elastic and inelastic single-degree-of-freedom systems was studied by nonlinear response-history analysis using earthquake histories that matched on average a 2000 NEHRP spectrum on a stiff soil site for a region of high seismic risk. New displacement reduction factors for levels of damping greater than 5% of critical are presented. New equations to relate inelastic and elastic displacements in the short-period range, for levels of damping greater than 5% of critical, are presented. The technical basis for reducing the minimum design base shear in dampe

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23

Li, Yajie, Zhiqiang Wu, Qixun Lan, Yujie Cai, Huafeng Xu, and Yongtao Sun. "The modulation of response caused by the fractional derivative in the Duffing system under super-harmonic resonance." Thermal Science 25, no. 3 Part B (2021): 2357–67. http://dx.doi.org/10.2298/tsci191201126l.

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The dynamic characteristics of the 3:1 super-harmonic resonance response of the Duffing oscillator with the fractional derivative are studied. Firstly, the approximate solution of the amplitude-frequency response of the system is obtained by using the periodic characteristic of the response. Secondly, a set of critical parameters for the qualitative change of amplitude-frequency response of the system is derived according to the singularity theory and the two types of the responses are obtained. Finally, the components of the 1X and 3X frequencies of the system?s time history are extracted by

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Sek, Michael A., Vincent Rouillard, and Anthony Parker. "Characterisation of the Nonlinear Behaviour of Expanded Polystyrene Cushions." Applied Mechanics and Materials 7-8 (August 2007): 283–88. http://dx.doi.org/10.4028/www.scientific.net/amm.7-8.283.

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There are two main characteristics of cushioning materials that are required to design a robust cushioning system for the protection of critical element against enviro-mechanical hazards: the attenuation of shocks as a function of the static load and the vibration transmissibility. The effect of a shock on a hypothetical critical element is normally evaluated by the Shock Response Spectrum (SRS) whereas the Frequency Response Function (FRF) performs similar function in relation to vibrations. This paper is concerned with the latter. Cushioning materials are generally nonlinear and, together wi

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傅, 千龙. "Study on Seismic Performance of Assembled Pier with Grouted Sleeve Connection Based on Response Spectrum Method." Hans Journal of Civil Engineering 10, no. 09 (2021): 873–81. http://dx.doi.org/10.12677/hjce.2021.109099.

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26

Pei, Chenlin, Chao Zhao, An-Jiang Wang, et al. "Critical Role for Interleukin-25 in Host Protective Th2 Memory Response against Heligmosomoides polygyrus bakeri." Infection and Immunity 84, no. 12 (2016): 3328–37. http://dx.doi.org/10.1128/iai.00180-16.

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Infection with parasitic nematodes, especially gastrointestinal geohelminths, affects hundreds of millions of people worldwide and thus poses a major risk to global health. The host mechanism of defense against enteric nematode infection remains to be fully understood, but it involves a polarized type 2 immunity leading to alterations in intestinal function that facilitate worm expulsion. We investigated the role of interleukin-25 (IL-25) in host protection against Heligmosomoides polygyrus bakeri infection in mice. Our results showed that Il25 and its receptor subunit, Il17rb , were upregulat

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27

Cardinale, Luciano, Giovanni Volpicelli, Maurizio Onoscuri, and Andrea Veltri. "Response to: The imaging spectrum of pulmonary tuberculosis: a critical appraisal. Acta Radiol 2015;56:NP1–NP2." Acta Radiologica 56, no. 6 (2015): NP35—NP36. http://dx.doi.org/10.1177/0284185114552646.

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28

Shafei, Shoresh, and Mark G. Kuzyk. "Critical role of the energy spectrum in determining the nonlinear-optical response of a quantum system." Journal of the Optical Society of America B 28, no. 4 (2011): 882. http://dx.doi.org/10.1364/josab.28.000882.

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29

Zeng, Zhe, Bin Liu, and Derun Zhang. "Critical evaluation of unit response function interconversions for asphalt concrete linear viscoelastic modeling using discrete spectrum." Construction and Building Materials 382 (June 2023): 131301. http://dx.doi.org/10.1016/j.conbuildmat.2023.131301.

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30

GU, SHI-JIAN, WING-CHI YU, and HAI-QING LIN. "A SPIN CHAIN WITH SPIRAL ORDERS: PERSPECTIVES OF QUANTUM INFORMATION AND MECHANICAL RESPONSE." International Journal of Modern Physics B 27, no. 21 (2013): 1350106. http://dx.doi.org/10.1142/s0217979213501063.

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In this paper, we study the ground state of a one-dimensional exactly solvable model with a spiral order. While the model's energy spectrum is the same as the one-dimensional transverse field Ising model, its ground state manifests a spiral order with various periods. The quantum phase transition from a spiral-order phase to a paramagnetic phase is investigated in the perspectives of quantum information science and mechanics. We show that the modes of the ground-state fidelity and its susceptibility can identify the change of periodicity around the critical point. We also study the spin torsio

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31

Jurney, Thomas H., James L. Cockrell, Thomas H. Jurney, Jill S. Lindberg, James M. Lamiell, and Charles E. Wade. "Spectrum of Serum Cortisol Response to ACTH in ICU Patients." Chest 92, no. 2 (1987): 292–95. http://dx.doi.org/10.1378/chest.92.2.292.

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32

Shi, Mo, Xiaoyan Xu, and Yeol Choi. "Response Spectrum Analysis of Adding External Elevators to Existing RC Buildings." Scientific Journal of Technology 6, no. 1 (2024): 8–23. http://dx.doi.org/10.54691/pj43gs62.

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In contemporary society, elevators stand as indispensable facilitators, particularly for users in tall buildings, contributing significantly to convenience. Their role becomes even more crucial for individuals with disabilities, serving as a vital means of transport to enable them to partake in modern life. However, a challenge emerges in the form of buildings erected during the 1970s or 1980s, lacking initial designs of elevators. This absence of elevator well designs presents substantial issues for building users, especially residents. However, many of these buildings have not reached the en

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33

Yao, Benchun, Zhen Tian, Xu Zhan, Changyun Li, and Hualong Yu. "Study on Rotor-Bearing System Vibration of Downhole Turbine Generator under Drill-String Excitation." Energies 17, no. 5 (2024): 1176. http://dx.doi.org/10.3390/en17051176.

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Downhole turbine generators (DHTG) installed within drill-string are susceptible to internal and external excitation during the drilling process, causing significant dynamic loads on bearings, and thereby reducing the bearing’s service life. In this study, a finite element model of an unbalanced rotor-bearing system (RBS) of DHTG with multi-frequency excitations, based on the Lagrangian motion differential equation, is established. The responses of the RBS under different drill-string excitations in terms of time-domain response, whirl orbit, and spectrum are analyzed. For a constant rotor spe

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34

Bradley, Brendon A. "Period Dependence of Response Spectrum Damping Modification Factors due to Source- and Site-Specific Effects." Earthquake Spectra 31, no. 2 (2015): 745–59. http://dx.doi.org/10.1193/070213eqs189m.

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Response spectrum damping modification factors are key components of displacement-based seismic design methods. This paper examines the period dependence of damping modification factors as a result of near-source forward directivity, basin-induced surface waves, and surficial soil response by using recorded ground motions from the Canterbury, New Zealand, earthquakes as examples. It is illustrated that spectral peaks in the 5% damped response spectra have systematically different damping modification factors than those suggested by conventional empirical formulas; this is also supported by arg

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35

Grishin, A. M., V. F. Drobot’ko, V. A. Khokhlov, A. I. Fedorenko, and A. Yulin. "Diamagnetic response of multi-layered superconducting Mo-Si films." Low Temperature Physics 19, no. 12 (1993): 930–33. https://doi.org/10.1063/10.0033551.

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Diamagnetic response of a thin film of superconducting Mo-Si superlattices was studied at 10 kHz as a function of the exciting field Hac = 5 · 10−4 –1 Oe and of the transport current jt− = 0–6 · 103 A/cm2. It is established that, as Hac is raised to 0.1 Oe, the diamagnetic response of Mo-Si superlattices is linear. However, even with further increase of the exciting field up to 0.7 Oe the critical state does not set in in the film. The diamagnetic signal spectrum, along with odd harmonics, reveals higher even harmonics. These experimental data are compared with diamagnetic susceptibilities of

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36

Fitzpatrick, Tony. "Postmodernism, Welfare and Radical Politics." Journal of Social Policy 25, no. 3 (1996): 303–20. http://dx.doi.org/10.1017/s004727940002362x.

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AbstractThis article argues that postmodernist theory is something which students of social policy should neither accept uncritically nor dismiss out of hand. Firstly, the article takes issue with the responses made to postmodernist theory by Ramesh Mishra and Peter Taylor-Gooby. Secondly, it argues that the ideas loosely known as ‘reflexive modernisation’ constitute a more measured and critical response, though such ideas are likely to be of little use to social policy research in the absence of any reference to a left-right spectrum. Thirdly, it argues that by combining reflexive modernisati

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Gómez, A., R. Ortega, J. J. Guerrero, E. González, J. P. Paniagua, and J. Iglesias. "The Mexico Earthquake of September 19, 1985—Response and Design Spectra Obtained from Earthquake-Damaged Buildings." Earthquake Spectra 5, no. 1 (1989): 113–20. http://dx.doi.org/10.1193/1.1585514.

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The resistant shear force of 13 buildings severely damaged by the 1985 Mexico City earthquake was determined by static and dynamic analyses. The results of the static analysis suggest the advisability of increasing the shear base coefficient of the 1987 Mexico City building code RDF87 from 0.4 to 0.6 in the high seismicity zones of the area. The results of the dynamic analysis show that in order to obtain the same safety level, the maximum ordinate of the design spectrum should be larger than the base shear coefficient used with the static method, leading to a 0.8 maximum ordinate for Mexico C

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Chen, Mingsheng, Guibo Yuan, Chun Bao Li, Xianxiong Zhang, and Lin Li. "Dynamic Analysis and Extreme Response Evaluation of Lifting Operation of the Offshore Wind Turbine Jacket Foundation Using a Floating Crane Vessel." Journal of Marine Science and Engineering 10, no. 12 (2022): 2023. http://dx.doi.org/10.3390/jmse10122023.

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The jacket is the most widely-used fixed foundation for offshore wind turbines due to its superior strength and low installation cost in relatively deep waters. Floating crane vessels are commonly used to install jacket foundations. However, the dynamic coupling between the jacket and the floating vessel might generate complex dynamic responses under wave action. The complexity of the multi-body system requires comprehensive time-domain simulations and statistical analysis to obtain reliable results, especially for the evaluation of the operational safety of offshore lift installations of a ja

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Carlson, Clinton, Dimitrios Zekkos, and Adda Athanasopoulos-Zekkos. "Predictive Equations to Quantify the Impact of Spectral Matching on Ground Motion Characteristics." Earthquake Spectra 32, no. 1 (2016): 125–42. http://dx.doi.org/10.1193/090914eqs140m.

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Spectral matching, the process of modifying a seed acceleration time history in intensity and frequency content until its acceleration response spectrum matches a target spectrum, is used extensively in practice. Predictive equations that quantify the impact of spectral matching on the peak ground velocity, peak ground displacement, Arias intensity, and cumulative absolute velocity of a scaled seed time history have been developed and validated on the basis of thousands of matched motions, three different earthquake scenarios, and numerous target spectra. It is found that spectral mismatch is

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Fraser, Rupsha, Aurelio Orta-Resendiz, David Dockrell, Michaela Müller-Trutwin, and Alexander Mazein. "Severe COVID-19versusmultisystem inflammatory syndrome: comparing two critical outcomes of SARS-CoV-2 infection." European Respiratory Review 32, no. 167 (2023): 220197. http://dx.doi.org/10.1183/16000617.0197-2022.

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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is associated with diverse host response immunodynamics and variable inflammatory manifestations. Several immune-modulating risk factors can contribute to a more severe coronavirus disease 2019 (COVID-19) course with increased morbidity and mortality. The comparatively rare post-infectious multisystem inflammatory syndrome (MIS) can develop in formerly healthy individuals, with accelerated progression to life-threatening illness. A common trajectory of immune dysregulation forms a continuum of the COVID-19 spectrum and MIS;

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Nahhas, Tariq M. "Sensitivity of Predicted Maximum Bending Moment to IBC Design Response Spectrum Parameters." Journal of Engineering Research [TJER] 6, no. 1 (2009): 66. http://dx.doi.org/10.24200/tjer.vol6iss1pp66-75.

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The parameters used to generate IBC (International Building Code) compliant design response spectra are specified only approximately for a given site in most cases and values may even be erroneous. S o, the question arises about the effect of approximation or error in the values of these parameters on the predicted internal forces in the structural elements of a building calculated on the basis of the provisions of IBC. This paper explores this issue and presents the sensitivities of design response spectra and maximum moments induced in the structure to these IBC parameters. Within the critic

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Haynes, Joel, Virginia Perry, Evelyn Benson, et al. "In Depth Breadth Analyses of Human Blockade Responses to Norovirus and Response to Vaccination." Viruses 11, no. 5 (2019): 392. http://dx.doi.org/10.3390/v11050392.

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To evaluate and understand the efficacy of vaccine candidates, supportive immunological measures are needed. Critical attributes for a norovirus vaccine are the strength and breadth of antibody responses against the many different genotypes. In the absence of suitable neutralization assays to test samples from vaccine clinical trials, blockade assays offer a method that can measure functional antibodies specific for many of the different norovirus strains. This paper describes development and optimization of blockade assays for an extended panel of 20 different norovirus strains that can provi

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Awosanya, D. O., A. A. Murana, and A. T. Olowosulu. "SIMPLIFIED MECHANISTIC – EMPIRICAL ANALYSIS OF FLEXIBLE PAVEMENT." FUDMA JOURNAL OF SCIENCES 7, no. 2 (2023): 176–87. http://dx.doi.org/10.33003/fjs-2023-0702-1727.

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Pavement stress-strain analysis is an ideal tool for analytical modelling of pavement behaviour and thus, constitutes an integral part of pavement design and performance evaluation. It is the fundamental basis for the mechanistic design theory. Predicting pavement response by simplified procedure analysis by relying on equivalency factors using axle load spectrum which is obtained from Weigh-In-Motion (WIM) data is aimed for this study. The framework for computing the structural response of the standard axle group loads on a pavement structure by using a layered elastic computer program and ca

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Wu, Xi, and Jim Meagher. "A Two-Disk Extended Jeffcott Rotor Model Distinguishing a Shaft Crack from Other Rotating Asymmetries." International Journal of Rotating Machinery 2008 (2008): 1–11. http://dx.doi.org/10.1155/2008/846365.

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A mathematical model of a cracked rotor and an asymmetric rotor with two disks representing a turbine and a generator is utilized to study the vibrations due to imbalance and side load. Nonlinearities typically related with a “breathing” crack are included using a Mayes steering function. Numerical simulations demonstrate how the variations of rotor parameters affect the vibration response and the effect of coupling between torsional and lateral modes. Bode, spectrum, and orbit plots are used to show the differences between the vibration signatures associated with cracked shafts versus asymmet

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Morahan, Page S., and Aangelo J. Pinto. "An Historic Overview of Biological Response Modifiers as Antiviral Agents." Canadian Journal of Infectious Diseases 3, suppl b (1992): 34–40. http://dx.doi.org/10.1155/1992/979517.

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A wide variety ofimmunomodulators/biological response modifiers (BRMs) has been demonstrated to provide broad spectrum antiviral activity against both RNA and DNA viruses in several animal species. Dramatic decreases in mortality, reduced virus titres in tissues and reduced histopathology can be produced. The antivirally effective agents include microbially derived materials, polyanions, cytokines and chemically diverse small molecular weight chemicals. The greatest protective effects are observed with prophylactic treatment. although early therapeutic treatment can also be effective. Little d

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Wong, Hector R., Natalie Cvijanovich, Geoffrey L. Allen, et al. "Genomic expression profiling across the pediatric systemic inflammatory response syndrome, sepsis, and septic shock spectrum*." Critical Care Medicine 37, no. 5 (2009): 1558–66. http://dx.doi.org/10.1097/ccm.0b013e31819fcc08.

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Kote, P. B., S. N. Madhekar, and I. D. Gupta. "Investigation of 30% rule for the combination of component response with the unidirectional principal response spectrum." June 15, 2019. https://doi.org/10.5281/zenodo.4063160.

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The paper investigates the validity of the [Max +30%] rule by comparing the results for a typical six-story steel building with the exact results based on the response spectrum in the principal direction and, the critical response spectrum providing an upper bound to the multi-directional component response. Three different sets of real earthquake ground motions with widely differing characteristics are used. It has been found that the [Max + 30%] rule, which is included in IS 1893 (2016) may not lead to realistic results in all the cases. 

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Kote, P. B., S. N. Madhekar, and I. D. Gupta. "Investigation of 30% rule for the combination of component response with the unidirectional principal and critical response spectrum." June 15, 2019. https://doi.org/10.5281/zenodo.4063371.

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The ground motion caused by an earthquake can be considered as the resultant of three orthogonal translation components along three Cartesian coordinates x, y, and z; and three rotational components about these three co-ordinate axes. Though it is well recognized that the response of important structures like nuclear reactor components, dams, tall buildings, and long-span bridges, may be dependent on all the three translational components of motion, due to the complexity of the three-dimensional analysis and various uncertainness in spatial combination procedures, most of the studies in the pa

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Kote, P. B., S. N. Madhekar, and I. D. Gupta. "A combination method for response of irregular buildings under simultaneous action of two horizontal components of earthquake motion." November 15, 2019. https://doi.org/10.5281/zenodo.4063520.

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The ground motion caused by an earthquake can be considered as the resultant of three orthogonal translation components along three Cartesian coordinates x, y, and z; and three rotational components about these three co-ordinate axes. Though it is well recognized that the response of important structures like nuclear reactor components, dams, tall buildings, asymmetric buildings, and long-span bridges, may be dependent on all the three translational components of motion, but due to the complexity of the three-dimensional analysis and various uncertainties in spatial combination procedures, mos

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Wang, Lijun, Xueting Huang, Qian Jin, et al. "Two-Component Response Regulator OmpR Regulates Mucoviscosity through Energy Metabolism in Klebsiella pneumoniae." Microbiology Spectrum, April 25, 2023. http://dx.doi.org/10.1128/spectrum.00544-23.

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Hypermucoviscosity is a critical virulent factor for Klebsiella pneumoniae infections, and its regulation remains poorly understood at the molecular level. This study aims to address this knowledge gap by investigating the role of response regulators in mediating hypermucoviscosity in K. pneumoniae .

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