Academic literature on the topic 'Ultrasonic research'

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Journal articles on the topic "Ultrasonic research"

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Lucas, M., A. Gachagan, and A. Cardoni. "Research applications and opportunities in power ultrasonics." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 12 (2009): 2949–65. http://dx.doi.org/10.1243/09544062jmes1671.

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The first applications in power ultrasonics were largely focused on ultrasonic cleaning baths, which rely on generating inertial cavitation, and the incorporation of ultrasonic excitation in manufacturing processes such as joining of plastics and metals. Since the early days of power ultrasonics there has been a rapid growth in the number of applications, and the diversified range of applications, from microwelding to ultrasonic osteotomy, has been made possible by a combination of advances in experimental techniques for characterizing low ultrasonic frequency vibrations and acoustics, and adv
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Uddin, Riaz, and Ahmed M. Al-Jumaily. "Ultrasonic Levitation for Airway Humidification." Sensors 24, no. 14 (2024): 4691. http://dx.doi.org/10.3390/s24144691.

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This study employs the transmitter part of an ultrasonic proximity sensor to generate a powerful ultrasonic field for medical humidification. This field is created using an arrangement of small ultrasonic transmitter transducers configured in an acoustic levitator-style setup. As droplets pass through this ultrasonic field, they undergo disintegration, leading to an accelerated evaporation process. The research findings highlight a significant change in droplet size distribution due to ultrasonics, resulting in a notable increase in the rate of evaporation. As a result, this study presents a c
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LIN, Jiyan, Yao LI, Cheng CHEN, et al. "Research on surface and defect controlled high power piezoelectric ultrasonic transducers." Acta Physica Sinica 74, no. 9 (2025): 094301. https://doi.org/10.7498/aps.74.20250047.

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<sec>Researches have shown that a reasonably designed phononic crystal defect structure in high-power piezoelectric ultrasonic transducers can effectively suppress stray vibration modes. However, when the size of the transducer is large, the improvement of the displacement amplitude of the radiation surface of the transducer device by the phononic crystal defect structure is still not so ideal. How to effectively suppress harmful vibrations while ensuring the operational efficiency of transducers and enhancing the displacement amplitude of their radiating surfaces has always been a chall
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Boutboul, Gérard, Jean-Luc Cohen, and Guy Bouloudnine. "Ultrasonic Lipoplasty: Physical Basis, Adipolytic Effect, Cadaver Research, and Clinical Studies." American Journal of Cosmetic Surgery 14, no. 3 (1997): 281–87. http://dx.doi.org/10.1177/074880689701400309.

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Liposuction has developed into one of the most popular of the cosmetic surgical procedures. Addition of ultrasonic lypolysis has improved the ease and efficiency of liposuction and results in less edema and bruising. The authors have tested commercially available appliances and researched this process in association with a protocol established by the French Society of Lipoplasty. The physical basis of ultrasonics, the effects on various tissues through cadaver experiments, and the results of clinical studies are presented.
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XIE, Weifeng. "Research on Ultrasonic Characteristics during Ultrasonic Assisted MIG Welding." Journal of Mechanical Engineering 52, no. 2 (2016): 19. http://dx.doi.org/10.3901/jme.2016.02.019.

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Cha, Hyun-Woo, and Kyung-Bae Jang. "Research on Ultrasonic Energy Measurement Method using Ultrasonic Vibrator." Transactions of The Korean Institute of Electrical Engineers 72, no. 8 (2023): 935–42. http://dx.doi.org/10.5370/kiee.2023.72.8.935.

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Zheng, Jiandong, and Xiaoguang Ren. "The effect of ultrasonic on the heat transfer of CaCO3 scaled water." Anti-Corrosion Methods and Materials 61, no. 2 (2014): 93–95. http://dx.doi.org/10.1108/acmm-04-2013-1251.

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Purpose – CaCO3 solution was chosen as the research environment in boiling pool heat transfer system using an automatic data collection system and scaling experiments. In this experiment, different concentrations of solution were made and ultrasonic excitation was applied under differing conditions of salt concentration and heat flux, such that the ultrasonics could reduce scale accumulation on the metal surface. The effectiveness of ultrasonics in inhabiting CaCO3 scale formation was evaluated. The paper aims to discuss these issues. Design/methodology/approach – Different concentration solut
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Dong, Wei, and Liu Yu. "Research of Ultrasonic Image Evaluation Based on Defect Dimension." Advanced Materials Research 542-543 (June 2012): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.91.

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Objective method of image quality evaluating is necessary for the research of ultrasonic imaging quality of different ultrasonic testing method, and deterministic calculation method is essential for the defect analyzing of ultrasonic image. Defect analyzing method of ultrasonic image is researched by threshold segmentation, noise point rejecting and area filling. Experiment results indicated that the defect position and size can be adjudged by the ultrasonic image.
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Jiang, Bing Yan, Jian Liang Hu, Wang Qing Wu, and Shu Ye Pan. "Research on the Polymer Ultrasonic Plastification." Advanced Materials Research 87-88 (December 2009): 542–49. http://dx.doi.org/10.4028/www.scientific.net/amr.87-88.542.

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Melt flow properties in micro cavity play an important role in the micro injection molding (MIM). Based on the point view of improving the melting plastification quality, this study focus on solving the problem of melt filling difficulty in micro cavity of MIM by introducing the ultrasonic vibration field into the polymer plastification process. This paper studied the polymer’s ultrasonic plasitfication process by Theoretical analysis and Polymer ultrasonic plastification experiment.
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Wang, Shuai, Xuewei Wang, Fucheng You, and Han Xiao. "Review of Ultrasonic Particle Manipulation Techniques: Applications and Research Advances." Micromachines 14, no. 8 (2023): 1487. http://dx.doi.org/10.3390/mi14081487.

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Ultrasonic particle manipulation technique is a non-contact label-free method for manipulating micro- and nano-scale particles using ultrasound, which has obvious advantages over traditional optical, magnetic, and electrical micro-manipulation techniques; it has gained extensive attention in micro-nano manipulation in recent years. This paper introduces the basic principles and manipulation methods of ultrasonic particle manipulation techniques, provides a detailed overview of the current mainstream acoustic field generation methods, and also highlights, in particular, the applicable scenarios
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Dissertations / Theses on the topic "Ultrasonic research"

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Tychkov, D. V., and C. V. Bazilo. "The research of piezoelectric transducers for ultrasonic medical systems." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65251.

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Piezoelectric transducers are widely used in the medical systems, special permanently in ultrasonic inhalation devices for spraying of drugs for the treatment of upper respiratory tract and lungs. The devices are simple enough, convenient and reliable in operation. It was developed a research installation for the research and parameters optimization of piezoelectric transducers that can be used as nebulizers, and aerosol cloud formation from an aqueous solution of drugs.
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Schiro, Arthur Leland. "A research platform for ultrasonic elastograpy based targeted prostate biopsy." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44541.

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Chiu, Chi-tat, and 趙志達. "Design and development of a programmable micro-ultrasound research platform with parallel computing capacity." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B46290977.

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Horne, Michael R. "Scanning measurement testbed for advanced nondestructive evaluation." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/30979.

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New materials and manufacturing processes, and the quest for economy and user safety, have necessitated the development of nondestructive testing methods to quantify the life and reliability of a product during manufacture and service. Described herein, is a testbed to be used in the research and development of these testing methods. A brief motivation for using ultrasonics applied to nondestructive evaluation is followed by a chapter on the feasibility of using a unique testing method and animated data presentation on advanced composite materials. This testing method, conceived by the author,
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Vandenbossche, Benoit. "Measurement of ultrasonic wave mode transition in unidirectional graphite/epoxy composites." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10242009-020340/.

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Tiwari, Anil. "A feasibility study of the acousto-ultrasonic technique to assure the quality of adhesively bonded sheet metal." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42207.

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This thesis contains the results of Phase-1 of a project funded by Ford Motor Company. The objective is to study the feasibility of Acousto-Ultrasonics (AU) as a nondestructive technique for assuring the quality of adhesively bonded sheet-metal used for automobiles. Other nondestructive (NDT) techniques were also applied viz., ultrasonics. radiography and thermography to supplement and verify the results of the AU technique. The AU Technique demonstrated the best results in terms of its sensitivity to the variations in the properties of the interface. Regions having kissing bonds or regions
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Buttram, Jonathan D. "Characterization of high temperature creep in siliconized silicon carbide using ultrasonic techniques." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040453/.

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Chandrana, Chaitanya K. "Development of A Focused Broadband Ultrasonic Transducer for High Resolution Fundamental and Harmonic Intravascular Imaging." Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1244664717.

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Мозгова, Юлія Анатоліївна, Юлия Анатольевна Мозговая, Yuliia Anatoliivna Mozghova, Олена Геннадіївна Васильєва, Елена Геннадьевна Васильева, and Olena Hennadiivna Vasylieva. "Clinical and ultrasonic features of defeat of palatine tonsils at the sick teenagers with chronic tonsillitis." Thesis, Medical University Pleven, 2014. http://essuir.sumdu.edu.ua/handle/123456789/37804.

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The chronic inflammation of palatine tonsils is characterized as a multifactorial immunopathological process and takes one of the leading places among nasopharyngeal pathology, especially in children and persons of young age. The aim of our research was investigating of clinical and ultrasonic features of defeat of palatine tonsils at children of teenage age with chronic tonsillitis.
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Mazzoccoli, Jason Paul. "Properties of poly(ethylene glycol) diacrylate blends and acoustically focused multilayered biocomposites developed for tissue engineering applications." online version, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=case1212612650.

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Books on the topic "Ultrasonic research"

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T, Donohoo D., Harris R. V, U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering Technology., and Pacific Northwest National Laboratory (U.S.), eds. An evaluation of human factors research for ultrasonic inservice inspection. Division of Engineering Technology, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1998.

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United States. National Aeronautics and Space Administration., ed. Analytical ultrasonics in materials research and testing: Proceedings of a conference. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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H, Cantrell John, Hanna Pamela D, and Langley Research Center, eds. An ultrasonic technique to measure the depth of burn wounds in humans. National Aeronautics and Space Administration, Langley Research Center, 1991.

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Lin, James C. Science and Technology Research Center on Energy Matter Interaction in Life Sciences: A proposal submitted to the National Science Foundation. University of Illinois at Chicago, 1988.

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Ch, Chaussy, and Germany (West). Bundesministerium für Forschung und Technologie., eds. Extracorporeal shock wave lithotripsy: Technical concept, experimental research, and clinical application. 2nd ed. Karger, 1986.

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J, Roth Don, and United States. National Aeronautics and Space Administration., eds. Commercial implementation of ultrasonic velocity imaging methods via cooperative agreement between NASA Lewis Research Center and Sonix, Inc. National Aeronautics and Space Administration, 1996.

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A, Altobelli Stephen, Voyles Wyatt F, and Greene E. R, eds. Cardiovascular ultrasonic flowmetry: Proceedings of the third annual Research Symposium of the Lovelace Medical Foundation, held February 14-15, 1985, in Albuquerque, New Mexico, U.S.A. Elsevier, 1985.

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Alonso, A., M. Hennerici, and Stephen P. Meairs. Translational neurosonology. Karger, 2015.

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A, Farmer Donald, and Lewis Research Center, eds. Thickness-independent ultrasonic imaging applied to abrasive cut-off wheels: An advanced aerospace materials characterization method for the abrasives industry : a NASA Lewis Research Center technology transfer case history. National Aeronautics and Space Administration, Lewis Research Center, 1998.

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A, Farmer Donald, and Lewis Research Center, eds. Thickness-independent ultrasonic imaging applied to abrasive cut-off wheels: An advanced aerospace materials characterization method for the abrasives industry : a NASA Lewis Research Center technology transfer case history. National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Book chapters on the topic "Ultrasonic research"

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Khalil, Abdelgalil, Faeez Masurkar, and A. Abdul-Ameer. "Estimating the Reliability of the Inspection System Employed for Detecting Defects in Rail Track Using Ultrasonic Guided Waves." In BUiD Doctoral Research Conference 2023. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-56121-4_19.

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AbstractThis work focuses on the implementation of a data-based method to determine the inspection system reliability in terms of detecting different types of damages in rail tracks using ultrasonic-guided Rayleigh waves and a probability of detection (POD) technique. In this study, the reliability is tested against a surface crack (SC) and sub-surface damage – a through-side thickness hole (TSTH). The guided Rayleigh waves are generated using a custom-designed sensor that excites Rayleigh surface waves in the specimen and the propagating waves are sensed on the rail track surface. The wedge s
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Sahoo, Susanta Kumar, and Mantra Prasad Satpathy. "Future Research Trends in Ultrasonic Spot Welding of Dissimilar Metal Sheets." In Ultrasonic Welding of Metal Sheets. CRC Press, 2020. http://dx.doi.org/10.1201/9780429294051-7.

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Fukuoka, H. "Ultrasonic Measurement Of Residual Stress." In Solid mechanics research for quantitative non-destructive evaluation. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3523-5_17.

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Khoa, Ngo Nhu, Nguyen Thi Bich Ngoc, and Tran Duc Tai. "A Review on Ultrasonic Stack Modelling." In Advances in Engineering Research and Application. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-64719-3_7.

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Bar-Cohen, Yoseph. "Ultrasonic NDE of Composites — A Review." In Solid mechanics research for quantitative non-destructive evaluation. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3523-5_12.

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Achenbach, J. D. "Flaw Characterization by Ultrasonic Scattering Methods." In Solid mechanics research for quantitative non-destructive evaluation. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3523-5_5.

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Adler, Laszlo. "Experimental Results of Ultrasonic Scattering from Discontinuities." In Solid mechanics research for quantitative non-destructive evaluation. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3523-5_6.

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Halabe, Udaya B., Samer H. Petro, and Powsiri Klinkhachorn. "An Ultrasonic Field Monitoring Instrument for Evaluation of Timber Bridges." In Research Transformed into Practice. American Society of Civil Engineers, 1995. http://dx.doi.org/10.1061/9780784400944.ch14.

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Herrero, Rolando. "IPv6 Adaptation in Ultrasonic NFC IoT Communications." In Futuristic Research Trends and Applications of Internet of Things. CRC Press, 2022. http://dx.doi.org/10.1201/9781003244714-8.

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Gundu, Pavan M., Preeti Birwal, Chaitradeepa G. Mestri, and Abila Krishna. "Low Temperature Based Ultrasonic Drying of Foods." In Handbook of Research on Food Processing and Preservation Technologies. Apple Academic Press, 2021. http://dx.doi.org/10.1201/9781003184720-4.

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Conference papers on the topic "Ultrasonic research"

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Liu, Enxiao, Youfan Song, Wenhao Gu, Yongmeng Liu, and Jinde Zheng. "Research on Ultrasonic Stress Precision Measurement Method." In 2024 International Conference on Sensing, Measurement & Data Analytics in the era of Artificial Intelligence (ICSMD). IEEE, 2024. https://doi.org/10.1109/icsmd64214.2024.10920576.

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Sweeney, Nina E., David Lines, Ewan Nicolson, et al. "Towards Real-Time Quantitative Monitoring and Control of Weld Pool Dimensions using Phased Array Ultrasonics." In ASNT Research Symposium 2023. The American Society for Nondestructive Testing Inc., 2023. http://dx.doi.org/10.32548/rs.2023.088.

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While ultrasonic NDT of welded joints is well understood and commercially undertaken at the end of the fabrication timeline, significant commercial benefits can be realised through the adoption of novel in-process inspection and monitoring techniques. This paper shows the use of phased array ultrasonics to monitor and analyse the molten weld pool live during weld deposition. The received ultrasonic signals are shown to contain information related to key physical transitions occurring within the welding process, namely the melting and solidification of the weldment. This preliminary work unlock
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Haszler, Alfred. "Ultrasonic Testing Beyond Flaw Detection." In ASNT Research Symposium 2019. ASNT, 2019. http://dx.doi.org/10.32548/rs.2019.006.

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Jia, Bing, and Zhi-jun Sun. "Research on an ultrasonic brake." In 2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA). IEEE, 2008. http://dx.doi.org/10.1109/spawda.2008.4775765.

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He, Jingxuan, Jian Zhang, and Zeji Hui. "Research on Ultrasonic Positioning Algorithm." In ICSCA '19: 2019 8th International Conference on Software and Computer Applications. ACM, 2019. http://dx.doi.org/10.1145/3316615.3316728.

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Pieris, Don, Panagiotis Kamintzis, Geo Davis, and Theodosia Stratoudaki. "Automated defect detection in ultrasonic images from a reconfigurable Laser Induced Phased Array." In ASNT Research Symposium 2023. The American Society for Nondestructive Testing Inc., 2023. http://dx.doi.org/10.32548/rs.2023.010.

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Laser Induced Phased Arrays (LIPAs) are based on the principles of laser ultrasonics where ultrasound is generated and detected by lasers. The laser beams are scanned on the inspected component, collecting data from various array element positions. In this way, an array is synthesized in post processing by applying a variety of ultrasonic imaging algorithms. Unlike transducer based phased arrays, which have fixed geometry of instrumentation, fixed number of elements and pitch as well as fixed operational ultrasonic frequency, LIPAs present a flexibility in array design and introduce the elemen
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Vela, Ramon, Satyajeet P. Deshpande, Joseph A. Turner, and Waled Hassan. "Directional Ultrasonic Scattering from Microtextured Regions in Titanium." In ASNT Research Symposium 2023. The American Society for Nondestructive Testing Inc., 2023. http://dx.doi.org/10.32548/rs.2023.018.

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Ultrasonic nondestructive evaluation (NDE) enables the inspection of materials with respect to flaws and microstructural anomalies. The manufacturing of titanium billets leads to the creation of microtextured regions (MTRs) which are a collection of grains with partially-aligned crystals axes. During ultrasonic inspections for detrimental inclusions, such as hard alphas, MTRs can sometimes lead to false positives indications. However, a detailed understanding of the interaction between an ultrasonic wave and an MTR is still the subject of on-going research. In this work, a Ti6Al4V billet was s
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Mierez, Jesus, Murtadha J. AlTammar, and Khalid M. Alruwaili. "Review of Recent Research Related to Ultrasonic Technologies for Well Productivity Enhancement." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0477.

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ABSTRACT In the last two decades, ultrasonic (US) technologies research has increasingly earned attention for applications in the oil and gas industry. Numerous laboratory and field studies have proven ultrasonics as an efficient, sustainable, and cost-effective technology for improving well productivity. This paper pursues the elaboration of a review of the most recent research related to ultrasonic technologies for applications in the oil and gas industry. The huge gap between numerical and field studies in comparison with laboratory studies deems it necessary to increase efforts on developi
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Jiao, Min. "Research of the Ultrasonic Distance Measure." In 2015 International Conference on Advances in Mechanical Engineering and Industrial Informatics. Atlantis Press, 2015. http://dx.doi.org/10.2991/ameii-15.2015.298.

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Zhang, Shaoyong. "Research of Ultrasonic Distance Measurement Device." In 2010 6th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM). IEEE, 2010. http://dx.doi.org/10.1109/wicom.2010.5601109.

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Reports on the topic "Ultrasonic research"

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Breckenridge, F. R., T. M. Proctor, N. N. Hsu, M. Greenspan, and D. G. Eitzen. Ultrasonic Measurements Research: Progress in 1987. Defense Technical Information Center, 1987. http://dx.doi.org/10.21236/ada188506.

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Breckenridge, F. R. ONR-sponsored research in ultrasonic measurements at NIST:. National Institute of Standards and Technology, 1992. http://dx.doi.org/10.6028/nist.ir.5101.

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Pond, D. J., D. T. Donohoo, and R. V. Jr Harris. An evaluation of human factors research for ultrasonic inservice inspection. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/582236.

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Harvey. L52288 Investigative Ultrasonic Meters in Heavy Oil Service. Pipeline Research Council International, Inc. (PRCI), 2008. http://dx.doi.org/10.55274/r0010045.

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Investigation into the status of Ultrasonic Flow Measurement in heavy oil service, specifically in fiscal measurements. The objective of the study was to determine the status of current technology, its limitations and gaps, affecting Ultrasonic Flow Measurement performance and to provide direction for future research and initiatives. Result: The first task completed was an industry standard survey of Ultrasonic Flow Measurement vendors. This survey required the research of existing publications, interviewing operators of existing installations and interviewing qualified ultrasonic meter vendor
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Wu, J. M., H. S. Huang, and C. D. Livengood. Development of an ultrasonic process for detoxifying groundwater and soil: Laboratory research. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/7177546.

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Zanker. PR-343-14605-R01 Ultrasonic Meter Recalibration Frequency Phase 2. Pipeline Research Council International, Inc. (PRCI), 2015. http://dx.doi.org/10.55274/r0010063.

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In this project, all relevant publications available since the completion of the previous PRCI recalibration research efforts (5 years) that address the stability of ultrasonic meters� and the results of recalibration were reviewed. The review concentrates on the use of ultrasonic meter diagnostics as a guideline for the need for recalibration rather than time in service. This study includes subsequent recalibration data and a questionnaire to indicate if users of ultrasonic meters have utilized ultrasonic meter diagnostics to determine the need for recalibration.
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Hawley and Thorson. PR-015-13606-R01 Ultrasonic Meter Performance in Liquid Transients. Pipeline Research Council International, Inc. (PRCI), 2014. http://dx.doi.org/10.55274/r0010846.

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This research evaluated the performance of select ultrasonic meters in natural gas flows before, during, and after transient liquid contamination from compressor oil and glycol. The research program evaluated the performance recovery characteristics of each ultrasonic meter after an extended period of dry gas flow and after meter cleaning. The diagnostics of the meters were also monitored to determine if they could be used to determine the presence of liquid contamination.
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Yurchenko, Oleksandr, Sergiy Kolyenov, Yuriy Pilgun, Galyna Pogorielova, Oleksandr Polishko, and Eugene Smirnov. Total Internal Reflection Ultrasonic Sensor for Detection of Subsurface Flaws: Research into Underlying Physics. Defense Technical Information Center, 2014. http://dx.doi.org/10.21236/ada620159.

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Field, M. Development of ultrasonic thermometry for high-temperature high-resolution temperature profiling applications in LMFBR safety research. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/5593010.

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George, Darin, and Christopher Grant. PR-015-15601-R01 Pulsation Effects on Ultrasonic Meters Phase II. Pipeline Research Council International, Inc. (PRCI), 2016. http://dx.doi.org/10.55274/r0010905.

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Transmission and storage operations frequently move natural gas using reciprocating compressors that may generate flow pulsations. Most measurement systems cannot accurately measure the flow rate of a pulsating gas stream, and the resulting errors can cause inaccurate gas volumes and accounting imbalances. A previous PRCI research project tested whether recent advances in ultrasonic meters may allow them to function without measurement error in pulsating flows. This project expanded on the previous work and tested similar ultrasonic meters to look for relationships between ultrasonic meter tra
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