Relevant bibliographies by topics / Acoustically Induced Stress Analysis

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Acoustically Induced Stress Analysis'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Acoustically Induced Stress Analysis"

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Shah, Benoy Nalin, and Roxy Senior. "Stress-induced Myocardial Ischaemia – Perfusion Contrast Echocardiography to Evaluate Presence and Severity of Coronary Artery Disease." European Cardiology Review 7, no. 3 (2011): 172. http://dx.doi.org/10.15420/ecr.2011.7.3.172.

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The development of stable transpulmonary ultrasound contrast agents (UCAs) has allowed the echocardiographic assessment of myocardial perfusion, a technique known as myocardial contrast echocardiography (MCE). MCE exploits the ultrasonic properties of UCAs, which consist of acoustically active gas-filled microspheres. These are intravascular agents that have a rheology similar to red blood cells and thus allow analysis of myocardial blood flow both at rest and after stress. The combined assessment of wall motion and myocardial perfusion provides significant diagnostic and prognostic information during stress echocardiography. Functional imaging tests, such as myocardial perfusion scintigraphy and stress cardiac magnetic resonance imaging, are also used for non-invasive assessment of coronary disease. The principal advantages of MCE are that it does not expose the patient to ionising radiation or radioactive pharmaceuticals, is not contraindicated in patients with an implanted metallic device or who suffer from claustrophobia and it can be performed at the bedside. The purpose of this article is to outline the physiological principles underpinning ischaemia testing with MCE before proceeding to review the evidence base for MCE in patients with known or suspected coronary artery disease.
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Doinikov, Alexander A., and Ayache Bouakaz. "Microstreaming generated by two acoustically induced gas bubbles." Journal of Fluid Mechanics 796 (May 4, 2016): 318–39. http://dx.doi.org/10.1017/jfm.2016.270.

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A theory is developed that describes microstreaming generated by two interacting gas bubbles in an acoustic field. The theory is used in numerical simulations to compare the characteristics of acoustic microstreaming at different frequencies, separation distances between the bubbles and bubble sizes. It is shown that the interaction of the bubbles leads to a considerable increase in the intensity of the velocity and stress fields of acoustic microstreaming if the bubbles are driven near the resonance frequencies that they have in the presence of each other. Patterns of streamlines for different situations are presented.
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Wang, Zeyu, Po-Hsun Huang, Chuyi Chen, Hunter Bachman, Shuaiguo Zhao, Shujie Yang, and Tony J. Huang. "Cell lysis via acoustically oscillating sharp edges." Lab on a Chip 19, no. 24 (2019): 4021–32. http://dx.doi.org/10.1039/c9lc00498j.

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HAYASHI, Itsuro, Teruo HIOKI, and Hiroshi ISOBE. "Sound-Structure Interaction Analysis of Acoustically Induced Piping Vibration in Process Plant." Proceedings of the Symposium on Environmental Engineering 2003.13 (2003): 32–35. http://dx.doi.org/10.1299/jsmeenv.2003.13.32.

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SHI, Qinzhong, and Shigemasa ANDO. "Acoustically Induced Random Vibration Analysis of Satellite Equipment Panel Using Frequency Averaged Apparent Mass." Transactions of the Japan Society of Mechanical Engineers Series C 73, no. 730 (2007): 1684–90. http://dx.doi.org/10.1299/kikaic.73.1684.

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Jiang, Genshan, Weilong Xu, Yuechao Liu, Yapan Wu, and Qian Kong. "A Numerical Study on the Oscillating Flow Induced by an Acoustic Field around Coal Particles." Journal of Combustion 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/8306839.

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In order to investigate the acoustically driven oscillating flow around coal particles in the power plant boiler, the two-dimensional, unsteady mass and momentum conservation equations for laminar flow in spherical coordinates are developed numerically. The velocity field, axial pressure gradient, shear stress, and flow separation angle on the particle surface are carefully analyzed with different values of acoustic Reynolds number and Strouhal number. The minimum frequency required for flow separation is also investigated with different SPL (sound pressure level). The axial pressure gradient, shear stress, and separation angle on the surface are proportional to the magnitude of the oscillating flow velocity at low frequency (~50 Hz). However, those physical quantities have different values at high frequency (~5000 Hz), due to the combined effect of curvature and the flow acceleration.
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Saha, Abhishek, Saptarshi Basu, and Ranganathan Kumar. "Effects of acoustic-streaming-induced flow in evaporating nanofluid droplets." Journal of Fluid Mechanics 692 (December 19, 2011): 207–19. http://dx.doi.org/10.1017/jfm.2011.505.

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AbstractWe study the effect of acoustic streaming on nanoparticle motion and morphological evolution inside an acoustically levitated droplet using an analytical approach coupled with experiments. Nanoparticle migration due to internal recirculation forms a density stratification, the location of which depends on initial particle concentration. The time scale of density stratification is similar to that of perikinetic-driven agglomeration of particle flocculation. The density stratification ultimately leads to force imbalance leading to a unique bowl-shaped structure. Our analysis shows the mechanism of bowl formation and how it is affected by particle size, concentration, internal recirculation and fluid viscosity.
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Zhang, Ji Qiao, Xi Qiao Feng, Gan Yun Huang, and Shou Wen Yu. "Theoretical Analysis of Chemisorption-Induced Surface Stress." Advanced Materials Research 528 (June 2012): 229–32. http://dx.doi.org/10.4028/www.scientific.net/amr.528.229.

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Atomic/molecular adsorption on a microcantilever surface can cause the cantilever to deflect as a result of the adsorption-induced surface stress. In this paper, based on atomic/molecular interactions, an energy-based model is proposed to calculate the chemisorption-induced surface stress. The connection between the chemisorption-induced surface stress and the covalent bond interactions is established. The results are consistent with relevant experimental observations. This study is helpful for characterizing and optimizing the mechanical response of cantilever-based sensors.
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Zhao, MingHao, LiPan Yao, and Tong-Yi Zhang. "Stress analysis of microwedge indentation-induced delamination." Journal of Materials Research 24, no. 6 (June 2009): 1943–49. http://dx.doi.org/10.1557/jmr.2009.0235.

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The indentation stress is the key and fundamental parameter in indentation delamination tests, which are widely used in characterization of the interfacial fracture toughness (or adhesion) between a thin film and its substrate. The indentation stress was analyzed in the present work by using the finite element method for microwedge indenters of different wedge angles and with various other geometrical and mechanical parameters including the penetration depth, film thickness, delamination size, Young's modulus, and yield strength of the indented film. The analysis exhibited the stress field under an indentation load and the stress field after unloading caused by plastic deformation, which resulted in the loading indentation stress and the unloading indentation stress, respectively, expressed by empirical formula in terms of the indenter geometry, the indentation depth, and the film thickness and mechanical properties. The energy release rate was also calculated for the indentation-induced interfacial crack.
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Bull, Vibeke Hervik, and Bernd Thiede. "Proteome analysis of tunicamycin-induced ER stress." ELECTROPHORESIS 33, no. 12 (June 28, 2012): 1814–23. http://dx.doi.org/10.1002/elps.201100565.

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Dissertations / Theses on the topic "Acoustically Induced Stress Analysis"

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Kurtoglu, Ilker. "Acoustically Induced Stress Analysis Of Center Fuselage Skin Panels Of A Basic Training Aircraft Using Statistical Energy Analysis." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610698/index.pdf.

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Two sample statistical energy analysis (SEA) models are generated for a section of the fuselage panel of an aircraft, namely the uniform panel model which includes the frames and stringers, and the ribbed panel model in which the frames and stringers are smeared into the skin. Turbulent boundary layer (TBL) excitation is used as the primary acoustic excitation source. Stress levels are estimated from the average velocity data of the panels. The stress results are found comply with those obtained by the AGARD method. Effect of radiation from panels to exterior and interior of the sample skin panel as well as the pressurization of the skin panels are investigated separately to analyze their effects on the stress levels. The method is then used in the analysis of center fuselage skin panels on a basic training aircraft. Two models are generated for the aircraft analysis, namely the complete aircraft model and the simplified model which excludes the wings and the empennage. In addition to TBL, propeller noise is used as the primary acoustic excitation source. The effects of the wings and the empennage on the stress levels in the center fuselage skin panels are also investigated along with the radiation from panels to the exterior and interior of the aircraft and pressurization of the pilot cabin.
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Earl, Simon. "The analysis of UV-B stress induced senescence." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402923.

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Raney, Joshua Arthur. "Transcriptome Analysis of Drought Induced Stress in Chenopodium Quinoa." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3915.

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RNA-seq transcriptome analysis of Chenopodium quinoa at different water treatment levels was conducted in a greenhouse study using four water treatments (field capacity to drought) on a valley ecotype quinoa (variety Ingapirca) and an Altiplano Salares ecotype quinoa (variety Ollague). Physiological results support the earlier findings that the Salares ecotypes display greater tolerance to drought-like stress conditions than the valley ecotypes (as determined by growth rate, photosynthetic rate, stomatal conductance, and stem water potential). cDNA libraries from root tissue sample for each treatment x variety combination were sequenced using Illumina Hi-Seq technology in an RNA-seq experiment. De novo assembly of the transcriptome generated 20,337 unique transcripts. Gene expression analysis of the RNA-seq data identified 462 putative gene products that showed differential expression based on treatment and 27 putative gene products differential expressed based on variety x treatment, including significant increasing expression in the root tissue in response to increasing water stress. BLAST searches and gene ontology analysis show an overlap with drought tolerance stress and other abiotic stress mechanisms.
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Kelly, Sandra 1958. "Analgesia induced by morphine or stress : an analysis of mechanisms." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72061.

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Analgesias induced by an interaction between restraint and morphine, an interaction between exposure to a novel environment and morphine, and by restraint alone were all shown to be dependent upon an increase in brain tryptophan uptake. Further investigation of the analgesia induced by an interaction between retraint and morphine revealed that the increase in brain tryptophan uptake was induced by sympathetic activity and that the nucleus raphe magnus, the nucleus raphe dorsalis, and the periaqueductal gray were critical to the analgesia. Examination of the endogenous opiod activity critical to analgesia induced by restraint alone revealed that the opioid activity was in the central nervous system and independent of tryptophan uptake. The findings reported in this thesis may be delineating a general mechanism for analgesia that involves stress, serotonin, and opioids.
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Hagaman, Kristin. "Activity-induced musculoskeletal stress marker analysis of the windover population." Tallahassee, Florida : Florida State University, 2009. http://etd.lib.fsu.edu/theses/available/etd-04302009-210253/.

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Thesis (M.A.)--Florida State University, 2009.
Advisor: Glen Doran, Florida State University, College of Arts and Sciences, Dept. of Anthropology. Title and description from dissertation home page (viewed on Oct. 20, 2009). Document formatted into pages; contains xiii, 130 pages. Includes bibliographical references.
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Schepers, Scott Timothy. "Renewal In The Context Of Stress: A Potential Mechanism Of Stress-Induced Reinstatement." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/780.

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In the animal laboratory, stressors can produce the relapse of drug-seeking behaviors after the behavior has been inhibited by extinction. This type of relapse has been called stress-induced reinstatement, and it models the relapse that is commonly reported in human populations. Interestingly, in the laboratory, stress does not typically reinstate extinguished behaviors that have been reinforced by food. One account of the discrepancy is that drugs of abuse may induce stress; therefore, when organisms learn to respond for drugs, they might learn to make the response in the “context” of stress. If so, then stress-induced reinstatement may be better described as renewal in a stress context. Renewal is the type of relapse that occurs when a behavior is returned to the original training context (or is shifted to a new context) after it has been inhibited or suppressed by extinction. Although renewal has usually been studied with contexts that differ in their exteroceptive cues, interoceptive cues (e.g., mood, food deprivation, and drug states) may also provide contexts. Accordingly, if an interoceptive stress state is present when food-seeking behavior is learned, then extinguished food seeking, like drug seeking, should also renew when the organism is stressed after extinction. In this dissertation, I discuss six experiments that investigated this hypothesis. Experiment 1 found that stressors renew extinguished food-seeking if they are also present during instrumental training. Experiments 2 and 3 then provided preliminary evidence that this effect is not exclusively due to incentive learning. Experiment 4 then suggested that interoceptive stress, and not the particular stressor that produces it, may indeed serve as a general interoceptive context that controls the effect. Experiment 5 found that stressors present for acquisition but not extinction training render behavior susceptible to stress induced relapse. The final experiment found that food-reinforced behavior learned in a context created by a cocaine injection renews after cocaine administration but not after footshock stress. Overall, the results indicate that the presence of interoceptive stress stimuli may play the role of context in a renewal paradigm and promote behavioral relapse when re-encountered after extinction. The implications for relapse that often occur following successful suppression of drug use and overeating behaviors are both discussed.
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Macgregor, Kenneth Waddell. "An investigation into the induced state of stress around inclined boreholes under non-hydrostatic stress conditions." Thesis, University of Strathclyde, 1987. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21493.

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This thesis details research conducted towards investigating the state of stress around inclined boreholes with the ultimate aim of predicting borehole stability and providing realistic estimates of closure stress. Chapter 1 discusses the factors affecting the stability of boreholes and reviews previous research conducted into borehole failure. The mechanics of hydraulic fracturing are reviewed as are methods of predicting fracture gradients. The manner in which closure stress is estimated is also critically reviewed. Chapter 2 describes an initial investigation into the stresses around inclined boreholes using the photoelastic technique of Stress Freezing. Chapter 3 details the laboratory determination of rock properties required for the borehole stability work detailed in Chapter 4. The applicability of the Brinell Hardness test to rock is also examined. Chapter 4 presents a detailed analysis of borehole stability. Failure criteria are developed and applied to estimate the mud weight required to maintain the hole in an elastic condition. To investigate the post-failure stability, existing 'yield zone' equations are modified to allow the effect of rock strength, oil flow rate, in-situ stress and hole angle to be examined. Chapter 5 describes the design and in-house manufacture of the specialised equipment required to measure fracture conductivity in the laboratory, the development of experimental procedures, the various test results and the conclusions drawn from them. Finally, the direct effect of a yield zone on the estimation of closure stress and on proppant selection is examined Chapter 6 summarises the conclusions that may be drawn from the work detailed in this thesis. The chapter also describes possible fields of future research which have been stimulated by the work presented. Two appendices are included, one providing a data-base of proppant properties, the other detailing the results of the application of the data-base to formation samples.
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Katam, Ramesh. "MOLECULAR AND BIOCHEMICAL ANALYSIS OF WATER STRESS-INDUCED RESPONSES IN GRAPE." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11052008-162021/.

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Water stress affects vine productivity, disease tolerance, and enological characteristics of grape. Florida Hybrid Bunch grape are developed through hybridization of local grape spp with Vitis vinifera. These cultivars are mostly grown in southeast region of United States. Water deficit conditions resulted due to failure of rains in the region has developed concern among Florida grape growers to increase water use efficiency of grape. The goal of this research is to identify genes and proteins differentially expressed in response to water stress and to correlate these changes with enological characteristics. Investigating transcripts and proteins will allow us to correlate them and confirm the involvement of specific genes responding to stress. Florida hybrid bunch Suwannee grape plants were maintained under green house conditions. Water stress was induced by withholding irrigation. The leaf samples were collected from both irrigated and stressed plants at 5, 10, 15 and 20 day interval. We generated over 200 Subtractive Hybridization PCR products from control and water stressed leaf tissues. Cloning, sequencing and transcript analysis revealed that, 54 genes related to drought and defense regulated pathways out of 125 characterized transcripts. Proteins were extracted from leaf tissue with trichloroacetic acid /acetone and separated by two-dimensional polyacrylamide gel electrophoresis (2D-PAGE). The proteins were sequenced in LC/Mass Spectrophotometer. The most important differentially expressed genes include sucrose synthase, actin, isoprene synthase, ABF3, SNF1 related protein kinase, WRKY type transcription factors, AP2, ASR2, glyoxalase I and, cytochrome b which play significant role in cell permeability, transportation, photosynthesis and, maintenance in osmotic stress. We have found that ribulose bisphosphate carboxylase and phosphoribulokinase, which play major role in photosynthesis, were suppressed in response to water stress in Florida hybrid bunch. The results suggested that water stress affects expression of cDNAs associated with defense and drought regulated functions. Such profiling studies will be used to explicate specific pathways disconcerted by water deficit treatments, and in the identification of varietal differences.
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Runnacles, Elizabeth. "Analysis of stress induced retinoblastoma protein activation using an SiRNA screen." Thesis, Institute of Cancer Research (University Of London), 2009. http://publications.icr.ac.uk/10166/.

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Activation of the retinoblastoma protein (RB), by stresses such as ionizing radiation (IR) or hypoxia, causes a cell cycle arrest and has been suggested to convey therapeutic resistance to cancer cells. To investigate the cell signaling networks mediating RB activation, with the aim of uncovering potential targets for sensitisation of cancer cells, I developed and carried out a high-throughput RNA interference screen of the Dharmacon kinome-covering small interfering (si)RNA library. This identified seven siRNA gene targets required for RB activation in response to ionizing radiation; PRPK, PRKACG, STK4, DYRK1A, HK1, CDK4 and p21-cip1/waf1. Silencing of these genes effectively reduced the percentage of cells exhibiting G1-like characteristics after IR treatment. Two of these seven targeted genes, PRPK and STK4, appear to be involved in IR-induced p21-cip1/waf1 upregulation and silencing of these two genes sensitised colon carcinoma cells to radiation treatment. Biochemical characterisation of cells with PRPK knockdown revealed that its expression is required for p53 upregulation and activation in response to IR. The work presented here provides first time evidence of a role for PRPK in the radiation response and implicates this gene product and the gene product of STK4 as targets to sensitise cells to radiation. The work further identifies other gene products necessary for RB activation and G1/S checkpoint activation, yet ablation of these did not confer loss of p21-cip1/waf1 induction or sensitisation to irradiation, indicating wiring of these gene products into mechanisms that promote radiation survival in the absence of RB activity and G1/S checkpoint control.
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Nam, Taeksun. "Finite Analysis of Residual Stress Field Induced by Laser Shock Peening." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1216991714.

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Books on the topic "Acoustically Induced Stress Analysis"

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Luiz Augusto Meira de Castro. Analysis of stress-induced damage initiation around deep openings excavated in a moderately jointed brittle rock mass. 1996.

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Test methods for assessing the susceptibility of prestressing steels to hydrogen induced SCC. London: Published for the European Federation of Corrosion by Maney on behalf of the Institute of Materials, Minerals and Mining, 2004.

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McManus, Hugh L. N., 1958- and United States. National Aeronautics and Space Administration., eds. Thermally induced damage in composite space structure: Predictive methodology and experimental correlation. [Washington, D.C: National Aeronautics and Space Administration, 1994.

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Thermally induced damage in composite space structure: Predictive methodology and experimental correlation. [Washington, D.C: National Aeronautics and Space Administration, 1994.

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Test Methods for Assessing the Susceptibility of Prestressing Steel to Hydrogen Induced Scc (European Federation of Corrosion). Maney Publishing, 2004.

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Luginbühl, Martin, and Arvi Yli-Hankala. Assessment of the components of anaesthesia. Edited by Antony R. Wilkes and Jonathan G. Hardman. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199642045.003.0026.

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In modern anaesthesia practice, hypnotic drugs, opioids, and neuromuscular blocking agents (NMBAs) are combined. The introduction of NMBAs in particular substantially increased the risk of awareness and recall during general anaesthesia. Hypnotic drugs such as propofol and volatile anaesthetics act through GABAA receptors and have typical effects on the electroencephalogram (EEG). During increasing concentrations of these pharmaceuticals, the EEG desynchronization is followed by gradual synchronization, slowing frequency, and increasing amplitude of EEG, thereafter EEG suppressions (burst suppression), and, finally, isoelectric EEG. Hypnotic depth monitors such as the Bispectral Index™, Entropy™, and Narcotrend® are based on quantitative EEG analysis and translate these changes into numbers between 100 and 0. Although they are good predictors of wakefulness and deep anaesthesia, their usefulness in prevention of awareness and recall has been challenged, especially when inhalation anaesthetics are used. External and patient-related artifacts such as epileptiform discharges and frontal electromyography (EMG) affect the signal so their readings need careful interpretation. Their use is recommended in patients at increased risk of awareness and recall and in patients under total intravenous anaesthesia. Monitors of analgesia and nociception are not established in clinical practice but mostly remain experimental although some are commercially available. Some use EEG changes induced by noxious stimulation (EEG arousal) or quantify the frontal EMG in relation to EEG, while others are based on the sympathoadrenergic stress response. Various other devices are also discussed in this chapter.
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Book chapters on the topic "Acoustically Induced Stress Analysis"

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Silva, Samuel, Nuno Bettencourt, Daniel Leite, João Rocha, Mónica Carvalho, Joaquim Madeira, and Beatriz Sousa Santos. "Myocardial Perfusion Analysis from Adenosine-Induced Stress MDCT." In Pattern Recognition and Image Analysis, 717–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21257-4_89.

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Matsuura, Hiroshi, Yasuhiro Kunieda, Nobuhito Yoshihara, and Tsunemoto Kuriyagawa. "Analysis of Stress-Induced Birefringence in Nd:YAG Crystal." In Advances in Abrasive Technology IX, 557–62. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-416-2.557.

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Cai, Fei, Keizo Ugai, Akihiko Wakai, and Seiichiro Kuroda. "Fully Coupled Dynamic Effective Stress Analysis of the Nigiri Landslide Triggered by 2004 Niigata-Chuetsu Earthquake." In Earthquake-Induced Landslides, 591–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32238-9_63.

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Jamison, Ryan D., Pierrette H. Gorman, Jeffrey Rodelas, Danny O. MacCallum, Matthew Neidigk, and J. Franklin Dempsey. "Analysis of Laser Weld Induced Stress in a Hermetic Seal." In Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems, Volume 9, 199–207. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21765-9_25.

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Lim, Sung Kyu. "3D Chip/Package Co-analysis of Stress-Induced Timing Variations." In Design for High Performance, Low Power, and Reliable 3D Integrated Circuits, 443–65. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-9542-1_16.

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Roh, H. S., and H. J. Lee. "Effects of Cushion on the Induced Earth Pressure by Roller Compaction." In Soil Stress-Strain Behavior: Measurement, Modeling and Analysis, 831–36. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6146-2_62.

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Wu, Honggang, Tao Yang, Huimin Ma, and Hongli Zhang. "Mechanism and Stability Analysis of the 2010 Yushu Earthquake (Ms7.1)-Induced Landslide Based on Point Safety Factor of Stress State." In Earthquake-Induced Landslides, 655–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32238-9_71.

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Li, Chao, and Lyesse Laloui. "Coupled Analysis of CO2 Injection Induced Stress Variation in the Caprock." In Advances in Laboratory Testing and Modelling of Soils and Shales (ATMSS), 455–62. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52773-4_54.

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Kongsukprasert, Lalana, Yusuke Sano, and Fumio Tatsuoka. "Compaction-Induced Anisotropy in the Strength and Deformation Characteristics of Cement-Mixed Gravelly Soils." In Soil Stress-Strain Behavior: Measurement, Modeling and Analysis, 479–90. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6146-2_30.

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Wakida, Shin-ichi, Xiaoling Wu, Kyoko Akama, Tomoko Motoshige, Kohzoh Yoshino, Katsunori Matsuoka, and Etsuo Niki. "High Throughput Stress Marker Assay using Polymer Microchip Electrophoresis with Laser induced fluorescence Detection." In Micro Total Analysis Systems 2002, 210–11. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0295-0_70.

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Conference papers on the topic "Acoustically Induced Stress Analysis"

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Dweib, Ahmed H. "Power Spectral Density Analysis of Acoustically Induced Vibration in Piping Systems." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78422.

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Acoustically induced vibration near points of large pressure reduction in piping systems can cause fatigue failure of the piping material at points of discontinuity. Empirical design curves have been used extensively for the assessment of acoustic fatigue risk level in piping systems. Subsequent development in the field resulted in the application of more detailed methods of analysis including, displacement-based and energy-based Finite Element Analysis (FEA) and Statistical Energy Analysis (SEA). Displacement-based FEA, which provides deterministic approach for the detailed analysis of the vibration response, is suitable for low and intermediate frequency range where the dynamic stresses in the pipe wall can be determined with reasonable certainty. For large complicated systems and high frequency range, the deterministic FEA becomes impractical due to the large number of mode shapes involved and the sensitivity of the results to small changes in system parameters. In these cases, the results of the FEA can have only a statistical value and SEA methods, which are based on statistical approach in contrast to deterministic approach, become more effective. SEA methods require accurate estimation of energy coupling parameters, on which the validity of the methods is dependent. In this paper, energy-based FEA is utilized for the evaluation of the system response and the SEA parameters. Power Spectral Density (PSD) analysis is performed for finite element model of a system consisting of pipe and acoustic fluid. The system is subjected to acoustically induced vibration through the input of acoustic energy at the downstream of a pressure-reducing valve. The system response is obtained and the parameters required for SEA, including the coupling power factor, are estimated.
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Ghosh, Arindam, Yaying Niu, and Rajesh Arjunan. "Difficulties in Predicting Cycles of Failure Using Finite Element Analysis of Acoustically Induced Vibration (AIV) Problems in Piping Systems." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28325.

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While finite element modeling analysis is becoming more frequent for analyzing AIV problems, in the absence of experimental data in large diameter pipe, there is no industry wide accepted methodology for representing the pressure excitation for the pipe so accurate cycles to failure may be predicted. The assumptions involved in determining the actual amplitude of the acoustic excitation, which modes may develop and how they couple with the structure all contribute to the overall uncertainty of the problem. Depending on the degree of correlation assumed between the structural and acoustical mode shapes the results vary dramatically. There are also variations based on the number of participating modes assumed. Relative strengths of a Weldolet®, an Insert Weldolet® that is a variation of Sweepolet® and a Reducing Tee connection were analyzed for a 24×6 inch Sch. 10S and STD connection assuming various degrees of correlation and mode participation. Wide fluctuations in the cycles to failure were observed based on the assumptions; however, the stress ratios between the connections are relatively stable. This suggests the use of an acoustic Stress Intensification Factor (SIF) in conjunction with Fatigue Strength Reduction Factors (FSRF) to determine suitability of connections in AIV service rather than an absolute value of cycles to failure. Further investigation of the trends in the value of SIF as the D/d (branch to header diameter) and D/t (diameter to thickness) ratios over a range of pipe diameter are required before these SIF’s could be put into use. Experimental data for a few controlled failure cases are required to ground the finite element prediction in reality. As the experiment is more likely to be conducted with air the possible pitfalls in extending the results from air to commonly used process fluid are also discussed.
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Hayashi, Itsuro, Teruo Hioki, and Hiroshi Isobe. "Investigation of Design Method for Piping Systems to Prevent Acoustic Fatigue in Process Plants." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1272.

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Piping systems for steam or gases with a pressure reducing device can cause acoustically induced vibration, resulting in material fatigue failure in process plant. Numerical investigation using sound-structure interaction analysis has been done to find the possible solution to reduce the dynamic stress level in the piping structure. The result shows that reinforcing of the pipe structure such as use of circumferential stiffener rings change the structural characteristic and the maximum stress in the pipe wall. Structural natural frequency is applied to evaluate both effectiveness of reinforcement of pipe structure and the effectiveness of the increase of pipe wall thickness.
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Kataoka, Shunji, and Takahiro Hida. "Evaluation of Stress in Vibrating Cylindrical Shells due to Acoustic Loading Based on Theory of Shells." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63383.

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Acoustically induced vibration (AIV) is recognized as a vibration of piping systems caused by the acoustic loading at the downstream of the pressure reducing devices. For decades several industrial practices which are derived from past experiences, have been applied for the design of piping system, however it is known that the practices includes uneven design margins. Due to the increase of the large capacity reducing devices, the demands of the development of reasonable screening and design method for AIV are increasing. A detailed assessment of fatigue life using finite element analysis has become popular and clarified the effect of acoustic load on several specific components; however, there are no clear way to explain the susceptibility against AIV depending on its diameter and thickness. Therefore the discussions based on engineering principles are required. In this paper, the vibration of cylindrical shells due to acoustic loading was discussed based on the theory of cylindrical shells. Results of several numerical studies based on the theoretical formulas were presented on the natural frequency and modal stress of vibrating shells on various geometries. Thus, the key factors to affect the vibrating shell stresses were clarified and some simplified formula to evaluate the vibrating shell stress was proposed.
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Giacomelli, Enzo, Marco Passeri, Matteo Romiti, and Stefano Generosi. "Forced Responce of Cylinder Manifold for Reciprocating Compressor Applications." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95504.

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The system consisting of the reciprocating compressor and associated bottles, known as the “Cylinder manifold” may potentially be the source and location of high vibration problems. Consequently special attention must be paid to the complete simulation of the system to assure smooth and safe operation. Applicable standards specify the items to be included in the study (crosshead guides, distance pieces, cylinder flanges, joints, supports, etc.). However only a model built using manufacturing drawings and validated by site measurements can provide a sufficient accurate description of the characteristics of these critical components and therefore realistic results. Knowledge of the frequencies and amplitudes of pulsation induced shaking forces defined by acoustical simulation, internal gas forces in the cylinder, and unbalanced mechanical forces and moments allows a proper forced response analysis of the cylinder manifold system to be performed. These forces are applied to the finite element model to calculate the relevant vibrations and stress amplitudes by performing a harmonic analysis. When the dynamic stresses are out of the limits it is necessary to go back to the cylinder manifold system analysis or to the acoustical study to find a solution using different supports, with lower shaking forces, or by modifying the volume bottle design. This enables an iterative analysis of the system until all requirements have been satisfied. Additional results of a forced response analysis are the reaction forces on the cylinder and discharge volume bottle supports. When the application requires a large and heavy acoustic damping system with consequently a low mechanical natural frequency, or the compressor speed is significantly high, the possibility of mechanical resonance in the first design is very high. Therefore the execution of these studies at a very early stage of the project is fundamental. The proper solution can be found only by close cooperation between the compressor manufacturer, end user, engineering contractor and vibration specialist.
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Motriuk, Roman W., Timothy Schmidt, John Webster, and Thangavel Thevar. "Determination of Dynamic Velocity and Strain Using Wide Field Holographic Interferometry: Verification." In 2000 3rd International Pipeline Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/ipc2000-276.

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High power and high capacity turbo-compressor systems frequently sustain acoustically induced vibrations. Higher order acoustic modes generated by turbo-compressors often couple selectively with structural pipe resonances producing significant increase in pipe wall vibration. In some instances, these coincidences generate high local stress levels that fatigue pipe shell or pipe attachments. In order to judge the level of dynamic strain and stress in piping systems, elaborate theories are employed. However, these are frequently not practical and relatively difficult to use in industrial applications, for example, in troubleshooting process. First, the accuracy of predicted results depends on assumed boundary conditions. The boundary conditions for on-site cases are rarely known and always difficult to estimate. Second, strains and stresses are complex and often difficult to determine, since they vary in space and time and may be caused by a multimode frequency excitation. Therefore, the strain and stress can only be predicted in reasonable bounds through laborious sensitivity and error analyses, which add further complexity to the already convoluted mathematical predictions. The correct stress level prediction in a structure, by means of directly measured vibrational velocity levels, is very desirable. Therefore, accurate mapping of the vibrational field is necessary. Since the mapping or evaluating of complex vibrational fields is very tedious and expensive using conventional technology (ample number of strain gauges or accelerometers), an alternative technique has been developed: wide field pulsed holographic interferometry. This method provides three dimensional field images of vibrating structures allowing extraction of the actual vibrational responses (displacement and velocity), and calculation of dynamic strain and stress information. These are described by their gradient, peak and phase values obtained from the holograms documenting vibrational fields. This paper describes empirical verification of the wide field pulsed holographic technology which is used to predict a service life of the complex piping structure subjected to multimode frequency excitation. The experimental work was carried out on a sample thin wall vessel, which was either empty or partially filled with water and excited by the hammer or shaker. Through the conversion of vibrational response levels into strain (and stress level), and verification of the conversion against strain gauge measurement results, the technology is proven as a diagnostic tool. It is concluded that there are many advantages of using holography to evaluate complex vibrational fields. They include: i) ‘instant’ results, ii) non-intrusive nature (i.e. the machinery subject to testing can operate without interruptions), iii) satisfactory accuracy, iv) complete and permanent records, and v) significant savings of time and money due to reducing the analysis effort and implementation of suitable recommendations.
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Allison, Timothy C., and Jeffrey Bennett. "Acoustically Induced Vibration Mitigations in Compressor Piping Systems." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57800.

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Acoustically induced vibration (AIV) is a high-frequency vibration phenomenon that can occur downstream of pressure-reducing devices such as control valves, restriction orifices, and pressure relief or safety valves in compressor piping systems. These vibrations can lead to high cycle fatigue failures of downstream piping at side branches or welded supports. Existing methods for screening and analyzing acoustically induced vibration are not well-grounded in the underlying physics and thus do not provide a methodology for evaluating a variety of mitigation strategies. Modeling of acoustically induced vibration is computationally challenging, as it requires the interaction between tens or hundreds of higher-order acoustic modes with a similar number of piping shell modes. In order to obtain better insight into the underlying physics of AIV and to characterize the effectiveness of several mitigation methods, full-scale blow-down testing was performed at Southwest Research Institute. Tests were performed using 20 MPa nitrogen gas vented at 28 kg/s through a 3×4” pressure safety valve and multiple header pipe sizes ranging from 12” to 36”. Test configurations included baseline piping geometry at each size and several AIV mitigations including stiffening rings, viscous damping wrap, and internal acoustic mode disruptors. Test results from strain gauges, accelerometers, and dynamic pressure transducers show a broadband multimodal response with dynamic stresses up to 3 kHz near the safety valve tailpipe connection to the test header, and various mitigations reduced dynamic stresses by 8–52% depending on the piping and type of mitigation. Acoustic and structural finite element models were analyzed in order to determine the coincident modes that match in both axial/circumferential shape and natural frequency and compare coincident frequencies with measure stresses. The results show that observed peak stress frequencies do not generally correlate well with predicted coincident modes, and that flow-induced turbulence excites frequencies below piping shell modes that can also result in significant stresses that combine with AIV.
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Bower, A. F., D. Fridline, A. Kumar, C. F. Shih, L. Xia, and Y. W. Zhang. "Finite element analysis of electromigration and stress in interconnects." In STRESS INDUCED PHENOMENA IN METALLIZATION. ASCE, 1998. http://dx.doi.org/10.1063/1.54650.

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Hayashi, Itsuro, and Shijie Guo. "Acoustically Induced Vibration of Drums Excited by Rotating Machinery." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71380.

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Rotating machinery generates pressure pulsations, and the pulsations may cause severe vibrations of drums in high frequency region, resulting in material fatigue failure under certain conditions. Experiments and numerical simulations were performed to investigate the mechanism of the high frequency vibrations of the drums downstream of compressors. The results show that fatigue failure occurs when acoustic diametral modes of a drum are excited by pressure loading. In order to establish practical countermeasures against the vibrations, three-dimensional sound-structural coupled analysis as well as one-dimensional pulsation analysis were conducted. As a result, practical measures such as changing diameter, or thickness of the drums, applying restriction orifice are confirmed effective by using the approach proposed in this study. The validity of the simulation methods incorporating the sensitivity to the fluid conditions is shown.
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Lu, Kuan H., Xuefeng Zhang, Suk-Kyu Ryu, Rui Huang, Paul S. Ho, Paul S. Ho, Ehrenfried Zschech, and Shinichi Ogawa. "Thermal Stresses Analysis of 3-D Interconnect." In STRESS-INDUCED PHENOMENA IN METALLIZATION: Tenth International Workshop on Stress-Induced Phenomena in Metallization. AIP, 2009. http://dx.doi.org/10.1063/1.3169263.

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Reports on the topic "Acoustically Induced Stress Analysis"

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Buckley, Paul, Milton Levy, John Beatty, and Richard Brown. Hydrogen-Induced Stress Corrosion Cracking Susceptibility Analysis of Pitch Links From the AH-64 Apache Helicopter. Fort Belvoir, VA: Defense Technical Information Center, September 1992. http://dx.doi.org/10.21236/ada260692.

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Rhymer, Donald W. Stress Intensity Solutions of Thermally Induced Cracks in Combustor Liner Hot Spots Using Finite Element Analysis (FEA). Fort Belvoir, VA: Defense Technical Information Center, December 2005. http://dx.doi.org/10.21236/ada450027.

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Gelles, D. S., and T. Shibayama. Analysis of stress-induced Burgers vector anisotropy in pressurized tube specimens of irradiated ferritic-martensitic steel: JLF-1. Office of Scientific and Technical Information (OSTI), September 1998. http://dx.doi.org/10.2172/330623.

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