Study on chemical mechanical polishing of silicon wafer with megasonic vibration assisted.

abstract：:It is well known that harmonic bounded Gaussian beams undergo a transformation into two bounded beams upon reflection on a solid immersed in a liquid. The effect is known as the Schoch effect and can be found at the Rayleigh angle for thick plates and at the different Lamb angles for thin plates. Here, a study is made...

journal_title：Ultrasonics

authors： Declercq NF

更新日期：2006-12-22 00:00:00

abstract：:Forced fluid flow can cause the enhancement of multibubble sonoluminescence (SL) under suitable conditions. The effect of directional flow with a circulator is similar to that of rotating flow with a stirrer. The mechanism of the enhancement is that both flows prevent cavitation bubbles from coalescing and clustering,...

journal_title：Ultrasonics

authors： Hatanaka S,Mitome H,Yasui K,Hayashi S

更新日期：2006-12-22 00:00:00

abstract：:As biotechnology develops, techniques for manipulating and separating small particles such as cells and DNA are required in the life sciences. This paper investigates on-chip manipulation of microparticles in small channels by using ultrasonic vibration. The chip consists of a rectangular glass substrate with a cross-...

journal_title：Ultrasonics

authors： Yamamoto R,Koyama D,Matsukawa M

更新日期：2017-08-01 00:00:00

abstract：:Ultrasound has been used to non-destructively assess the quality of many foods such as meat, fish, vegetables and dairy products. This paper addresses the applications of low intensity ultrasonics in the cheese manufacturing processes and highlights the areas where ultrasonics could be successfully implemented in the ...

journal_title：Ultrasonics

authors： Benedito J,Carcel JA,Gonzalez R,Mulet A

更新日期：2002-05-01 00:00:00

abstract：:In this work, the existence of the optimal working frequency for ultrasonic motors (USMs) is theoretically and experimentally verified for the first time, at which working point the power dissipation of the motors arrives at its minimum value. The mathematical model of the mechanical quality factor is initially deduce...

journal_title：Ultrasonics

authors： Shi W,Zhao H,Ma J,Yao Y

更新日期：2016-08-01 00:00:00

abstract：:The aim of this work is to investigate the absolute phase information in resonance acoustic scattering by spheres and cylinders and place this work in the broader context of scattering in which the properties of the magnitude and (processed) phase have been examined in a more general way than in the classical resonanc...

journal_title：Ultrasonics

authors： Mitri FG,Greenleaf JF,Fellah ZE,Fatemi M

更新日期：2008-07-01 00:00:00

abstract：:A method for fabricating disposable membrane hydrophones is presented. The disposable hydrophones are intended for onetime use in such damaging environments as chemically contaminating fluids and high-amplitude (peak amplitude ∼100MPa) shock wave fields, where the use of commercial membrane hydrophones is not recommen...

journal_title：Ultrasonics

authors： Lee JW,Ohm WS,Kim YT

更新日期：2017-11-01 00:00:00

abstract：:An ultrasonic probe consisting of two optical fiber-based miniaturized transducers for wideband ultrasound emission and detection is employed for the characterization of in vitro biological tissues. In the probe, ultrasound generation is obtained by thermoelastic emission from patterned carbon films in Micro-Opto-Mech...

journal_title：Ultrasonics

authors： Vannacci E,Granchi S,Belsito L,Roncaglia A,Biagi E

更新日期：2017-03-01 00:00:00

abstract：:In cancellous bone, longitudinal waves often separate into fast and slow waves depending on the alignment of bone trabeculae in the propagation path. This interesting phenomenon becomes an effective tool for the diagnosis of osteoporosis because wave propagation behavior depends on the bone structure. Since the fast w...

journal_title：Ultrasonics

authors： Nagatani Y,Mizuno K,Saeki T,Matsukawa M,Sakaguchi T,Hosoi H

更新日期：2008-11-01 00:00:00

abstract：:We have developed an ultrasonic array sensor useable for locating air leaks in manned spacecraft and have found that this sensor locates leaks in a 1-m(2) plate to within 2 cm. The sensor consists of a 63-element multiplexed array plus a reference element, all constructed from a single PZT disc and a printed circuit b...

journal_title：Ultrasonics

authors： Holland SD,Roberts R,Chimenti DE,Song JH

更新日期：2006-12-01 00:00:00

abstract：:In medical ultrasound imaging, dynamic range (DR) is defined as the difference between the maximum and minimum values of the displayed signal to display and it is one of the most essential parameters that determine its image quality. Typically, DR is given with a fixed value and adjusted manually by operators, which l...

journal_title：Ultrasonics

authors： Lee Y,Kang J,Yoo Y

更新日期：2015-02-01 00:00:00

abstract：:The Arg-Gly-Asp (RGD) peptide sequence was conjugated to poly (lactid acid), (PLA), microcapsules. These hollow, biodegradable PLGA microcapsules were developed in our laboratory for use as ultrasound contrast agents. By modifying the surface of the agent with a targeting ligand, it can be targeted to a specific addre...

journal_title：Ultrasonics

authors： Lathia JD,Leodore L,Wheatley MA

更新日期：2004-04-01 00:00:00

abstract：:This paper presents the influence of ultrasonic beam ray refraction effect on the internal object structure imaging using the ultrasound transmission tomography method (UTT), in parallel ray projection geometry, for ultrasonic pulse run-time measurements. Simulation calculations carried out using specially elaborated ...

journal_title：Ultrasonics

authors： Opielinski KJ,Gudra T

更新日期：2000-03-01 00:00:00

abstract：:Traditional rotary corers and sample retrieval mechanisms for planetary drilling suffer from a variety of technical difficulties. A heavy and rigid drillstring must be assembled on-site and deployed with considerable applied preload and torque, and these mechanical loadings are difficult to react in a low gravity envi...

journal_title：Ultrasonics

authors： Harkness P,Lucas M,Cardoni A

更新日期：2011-12-01 00:00:00

abstract：:As known, anomalous resisto-acoustic effect is a fundamental property for weakly inhomogeneous piezoactive waves (Bleustein-Gulyaev, Love, and some leaky waves). It consists in that the velocity of aforementioned waves first increases, achieves its maximum, and only then decreases with increasing conductance of a laye...

journal_title：Ultrasonics

authors： Kuznetsova IЕ,Zaitsev BD

更新日期：2015-05-01 00:00:00

abstract：:A practical optodynamic study was performed to determine the usability of different lengths of laser pulses for the generation of ultrasonic transients in a solid material. The aim of the study was to evaluate the possibility of a dual use for a laser pulse-for laser material processing, on the one hand, and for the u...

journal_title：Ultrasonics

authors： Hrovatin R,Petkovsek R,Diaci J,Mozina J

更新日期：2006-12-22 00:00:00

abstract：:An ultrasonic technique for imaging nonlinear scatterers, such as partially-closed cracks, buried in a medium has been recently proposed. The method called fundamental wave amplitude difference (FAD) consists of a sequence of acquisitions with different subsets of elements for each line of the image. An image revealin...

journal_title：Ultrasonics

authors： Haupert S,Ohara Y,Carcreff E,Renaud G

更新日期：2019-07-01 00:00:00

abstract：:Ultrasonic testing has been used for many decades, proving itself very efficient for detecting defects in many industrial sectors. The desire to apply ultrasonic testing to geometrically complex structures, and to anisotropic, inhomogeneous materials, together with the advent of more powerful electronics and software,...

journal_title：Ultrasonics

authors： Mineo C,Lines D,Cerniglia D

更新日期：2021-03-01 00:00:00

abstract：:Accurate computation of dispersion characteristics of guided waves in rails is important during the development of inspection and monitoring systems. Wavenumber versus frequency curves computed by the semi-analytical finite element method exhibit mode repulsion and mode crossing which can be difficult to distinguish. ...

journal_title：Ultrasonics

authors： Loveday PW,Long CS,Ramatlo DA

更新日期：2018-03-01 00:00:00

abstract：:The main challenge faced by 3D ultrasonic imaging with 2D array transducers is the large number of elements required to achieve an acceptable level of quality in the images. Therefore, the optimisation of the array layout, in order to reduce the number of active elements in the aperture, has been a research topic in t...

journal_title：Ultrasonics

authors： Martínez-Graullera O,Martín CJ,Godoy G,Ullate LG

更新日期：2010-02-01 00:00:00

abstract：:Today, sophisticated instruments and algorithms used for process control allow the efficient production of substances with the quality guaranteed to the customer. However, production and management techniques are changing. This article aims to analyze trends resulting from those changes from the point of view of ultra...

journal_title：Ultrasonics

authors： Püttmer A

更新日期：2006-12-22 00:00:00

abstract：:The present paper studies experimentally and numerically the surface acoustic wave (SAW) field on a piezoelectric substrate generated by interdigital transducers (IDT). On the one hand, mechanical displacements produced by the SAW are measured with the help of a laser Doppler vibrometer. On the other hand, mechanical ...

journal_title：Ultrasonics

authors： Weser R,Darinskii AN,Weihnacht M,Schmidt H

更新日期：2020-08-01 00:00:00

abstract：:The fundamental role of the assumption of plane wave ultrasonic propagation in attenuation and scattering measurements on soft tissues is discussed. The evidence for and against the validity of the assumption is shown to be inconclusive. An experimental procedure for direct assessment, by measurement of the ultrasonic...

journal_title：Ultrasonics

authors： Aindow JD,Chivers RC

更新日期：1988-03-01 00:00:00

abstract：:In order to guide the needle to the correct location in 3D US-guided brachytherapy, the needle is continuously tracked as it is being inserted. A pre-scan before the needle insertion and a post-scan after the needle insertion are subtracted to obtain a difference image containing the needle. The image is projected alo...

journal_title：Ultrasonics

authors： Ding M,Wei Z,Gardi L,Downey DB,Fenster A

更新日期：2006-12-22 00:00:00

abstract：:Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease. Quantitative ultrasound facilitates clinical grading of hepatic steatosis (the early stage of NAFLD). However, the utility of quantitative ultrasound as a first-line method for community screening of hepatic steatosis remains unclear. T...

journal_title：Ultrasonics

authors： Chang TY,Chang SH,Lin YH,Ho WC,Wang CY,Jeng WJ,Wan YL,Tsui PH

更新日期：2021-03-01 00:00:00

abstract：:In this paper, a new topological structure for the Langevin-type ultrasonic transducer is proposed and investigated. The two cylindrical terminal blocks are conically shaped with four supporting plates each, and two cooling fins are disposed at the bottom of terminal blocks, adjacent to the piezoelectric rings. Experi...

journal_title：Ultrasonics

authors： Lu X,Hu J,Peng H,Wang Y

更新日期：2017-03-01 00:00:00

abstract：BACKGROUND:Ultrasound tissue harmonic signal generally provides superior image quality as compared to the linear signal. However, since the generation of the tissue harmonic signal is based on finite amplitude distortion of the propagating waveform, the penetration and the sensitivity in tissue harmonic imaging are mar...

journal_title：Ultrasonics

authors： Shen CC,Shi TY

更新日期：2011-07-01 00:00:00

abstract：:In this paper, te edge mode variation is studied with three different methods: the reciprocal work method, already used by Torvik [J. Acoust. Soc. Am. 41 (1967) 346] to model this phenomenon, the S-parameter method and a finite element model that are applied for the first time to the study of the edge resonance. Moreo...

journal_title：Ultrasonics

authors： Le Clezio E,Predoi MV,Castaings M,Hosten B,Rousseau M

更新日期：2003-01-01 00:00:00

abstract：:This paper reports the development of a two-dimensional thick film lead zirconate titanate (PZT) ultrasonic transducer array, operating at frequency approximately 7.5MHz, to demonstrate the potential of this fabrication technique for microparticle manipulation. All layers of the array are screen-printed then sintered ...

journal_title：Ultrasonics

authors： Qiu Y,Wang H,Gebhardt S,Bolhovitins A,Démoré CE,Schönecker A,Cochran S

更新日期：2015-09-01 00:00:00

abstract：:In this newly developed method, the ultrasonic diagnosis has become quantitative. The data will remain quantitative so far as an image storage tube is used. With the conventional storage type CRT, it is impossible to memorize the reflected echo signals of different strength levels. But with our method, it becomes poss...

journal_title：Ultrasonics

authors： Yokoi H,Tatsumi T,Ito K

更新日期：1975-09-01 00:00:00