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  • Comparative Studies. Non-European Languages/Literatures  (24)
  • 1
    In: Brain and Language, Elsevier BV, Vol. 215 ( 2021-04), p. 104920-
    Type of Medium: Online Resource
    ISSN: 0093-934X
    RVK:
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 1462477-1
    SSG: 5,2
    SSG: 7,11
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  • 2
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2014
    In:  The Journal of the Acoustical Society of America Vol. 135, No. 4_Supplement ( 2014-04-01), p. 2210-2210
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 135, No. 4_Supplement ( 2014-04-01), p. 2210-2210
    Abstract: Over five million U.S. men and women suffer from neurodegenerative diseases. Although great progress has been made in recent years toward understanding of these diseases, few effective treatments and no cures are currently available. This is mainly due to the impermeability of the blood-brain barrier (BBB) that allows only 5% of more than 7000 small-molecule drugs available to treat only a tiny fraction of these diseases. Safe and localized opening of the BBB has been proven to present a significant challenge. Focused ultrasound (FUS), in conjunction with microbubbles, remains the sole technique that can induce localized BBB opening noninvasively and regionally. In the past, our group has focused on cavitation monitoring during BBB opening in both mice and non-human primates, assessment of safety and drug efficacy using behavioral testing, delivery of molecules of variant size through the opened BBB, investigation on the role of the microbubble diameter and use of nanodroplets. We will briefly highlight these past findings as well as introduce newer accomplishments such as its role in enhancement of drugs for neuroprotection and neuroregeneration in the treatment of Parkinson's, the use of alternative routes of systemic administration for larger drug dosage, dependence of the BBB opening size on the acoustic pressure, real-time monitoring of the microbubble perfusion of the brain, cavitation prediction of the timeline of BBB opening, and targeted delivery using adeno-associated viruses.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2014
    detail.hit.zdb_id: 1461063-2
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  • 3
    In: Brain and Language, Elsevier BV, Vol. 230 ( 2022-07), p. 105126-
    Type of Medium: Online Resource
    ISSN: 0093-934X
    RVK:
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 1462477-1
    SSG: 5,2
    SSG: 7,11
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  • 4
    Online Resource
    Online Resource
    Elsevier BV ; 2022
    In:  System Vol. 107 ( 2022-07), p. 102797-
    In: System, Elsevier BV, Vol. 107 ( 2022-07), p. 102797-
    Type of Medium: Online Resource
    ISSN: 0346-251X
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 1500775-3
    detail.hit.zdb_id: 189289-7
    SSG: 7,11
    SSG: 5,3
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  • 5
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2020
    In:  The Journal of the Acoustical Society of America Vol. 148, No. 6 ( 2020-12-01), p. 3772-3783
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 148, No. 6 ( 2020-12-01), p. 3772-3783
    Abstract: In the field of measuring the complex wave number and characteristic impedance of porous materials, available impedance tube approaches assume that only plane wave is propagating such that the maximum frequency is limited below the cut-off frequency of the first higher order mode. This indicates that if measurements at higher frequencies are required, the tube size has to be reduced, as well as the size of porous material sample, which may cause inaccurate results due to tube attenuation and edge-constraint effects. Through simulations, this paper presents an extended transfer matrix method to remove the plane wave assumption based on the fact that the propagation of plane wave through the porous sample can be characterized by the same transfer matrix whether higher order modes exist or not. This method arranges measuring points upstream and downstream the sample for implementing mode decomposition to extract the transfer matrix for plane wave in a multi-modal field. From the matrix elements, the complex wave number and characteristic impedance are determined in the same way as the original transfer matrix method. Based on numerical simulations and the Monte Carlo approach, the method effectiveness and a suitable measuring points layout are studied in this paper.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2020
    detail.hit.zdb_id: 1461063-2
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  • 6
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2013
    In:  The Journal of the Acoustical Society of America Vol. 133, No. 5_Supplement ( 2013-05-01), p. 3545-3545
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 133, No. 5_Supplement ( 2013-05-01), p. 3545-3545
    Abstract: The multi-functional ultrasonic imaging logging tool can provide casing inspection and cement bonding evaluation by using ultrasonic pulse echo technique. The casing’s internal conditions can be inspected from echo amplitude and transit time curves. The casing thickness and the cement impedance can be calculated from resonance frequency and resonance decay. The paper describes three well cases histories of casing inspection in detail with this instrument. The first case reports the evaluation of perforation interval in the cased hole; hole enlargement of perforation interval and perforations can be seen from echo amplitude and casing internal radius imaging curves. In the second case, we cannot distinguish corrosion or deposits in the casing surface from the echo amplitude and transit time curves, but casing thickness imaging curve characterize some slight corrosion. Finally, the last case history describes evaluation of casing mechanical wear in a deviated well; casing thickness imaging curve shows mechanical wear is caused by logging instrument in low side well. All cases shows that the multi-functional ultrasonic imaging logging tool can provide both quantitative and qualitative evaluation and diagnosis of casing problems.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2013
    detail.hit.zdb_id: 1461063-2
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  • 7
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2012
    In:  The Journal of the Acoustical Society of America Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3288-3288
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3288-3288
    Abstract: Cardiovascular disease is the main causes of morbidity and mortality due to lumen stenosis and atherosclerosis. Intravascular ultrasound (IVUS) is able to delineate internal structures of vessel wall with fine spatial resolution. However, IVUS is insufficient to identify the fibrous cap thickness and tissue composition of atherosclerotic lesions, the key factors to stage atherosclerosis and determine appropriate treatment strategies. Currently, novel techniques have been developed to determine tissue composition, which require an open IVUS system to accommodate these techniques for comprehensive plaque characterization. This paper presents the development of such an IVUS system with reconfigurable hardware implementation, programmable image processing algorithms, and flexible imaging control to support an easy fusion with other techniques to improve the diagnostic capabilities for cardiovascular diseases. In addition, this IVUS utilized a miniaturized ultrasound transducer constructed by PMN-PT single crystal for better piezoelectric constant and electromechanical coupling coefficient than traditional PZT ceramics. Testing results showed that the IVUS system could offer a minimum detectable signal of 25μV, allowing a 51dB dynamic range at 47dB gain, with a frequency range from 20MHz to 80MHz. Finally, phantom imaging and in vitro vessel imaging were conducted to demonstrate the performance of the open system for IVUS applications.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2012
    detail.hit.zdb_id: 1461063-2
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  • 8
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2012
    In:  The Journal of the Acoustical Society of America Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3424-3424
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 131, No. 4_Supplement ( 2012-04-01), p. 3424-3424
    Abstract: When stimulated with biologically relevant constant frequency–frequency modulation (CF–FM) sounds, the inferior collicular neurons of the CF–FM bat, Hipposideros armiger, either only discharged impulses to the onset (76%, single-on neurons) of the CF-FM sounds or to the onset of both CF and FM components of CF–FM sounds (24%, double-on neuron). Some neurons were single-on responders at low sound amplitude but become double-on responders at high sound amplitude. Single-on responders had longer latency and recovery cycle than double-on responders. While most neurons did not respond to the second sound when the paired CF-FM sounds overlapped, 3 single-on and 7 double-on neurons did such that they had “cyclic” recovery cycles with inter-pulse intervals. The different response latency and dynamic variation in the recovery cycle of these two types of neurons suggest they may serve as the neural basis underlying a bat's ability to perform echo ranging throughout different phases of hunting.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2012
    detail.hit.zdb_id: 1461063-2
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  • 9
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2001
    In:  The Journal of the Acoustical Society of America Vol. 110, No. 5_Supplement ( 2001-11-01), p. 2621-2621
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 110, No. 5_Supplement ( 2001-11-01), p. 2621-2621
    Abstract: A combined ray tracing and image source model RATISM has been developed specially for the simulation of sound propagation throughout long enclosures such as a corridor. How the algorithm models sound source, sound propagation, and sound receiver was described. The ways in which more complex long enclosures can be modeled were also given. The methods of the prediction of reverberation time and sound pressure level were presented in detail. Three different enclosures were modeled and the results were analyzed. The reverberation room of Northwestern Polytechnic University was measured and predicted to show RATISM can be used for both diffused and nondiffused sound field. A rectangular long enclosure was then predicted by RATISM and NORMAL [L. N. Yang and B. M. Shield, J. Sound Vib. 229, 133–146 (2000)] and the comparison showed that both the two models can correctly simulate the sound field in rectangular long enclosures. A more complicated long enclosure was also simulated and the results showed that the sound field in it had similar characteristic to that in the rectangular one, in which the sound field is nondiffused and sound distribution was mainly dependent on the distance of receiver to source. [Work supported by the Doctorate Foundation of Northwestern Polytechnical University.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2001
    detail.hit.zdb_id: 1461063-2
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  • 10
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2001
    In:  The Journal of the Acoustical Society of America Vol. 110, No. 5_Supplement ( 2001-11-01), p. 2621-2621
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 110, No. 5_Supplement ( 2001-11-01), p. 2621-2621
    Abstract: A combined auralization and visualization system was devised for the research on internoise control. For any individual point in an enclosure, a hybrid geometric method was used to simulate the impulse response at high frequency and the finite element method was used to model that at low frequency. Then the two parts were joined. Acoustical indexes such as SPL(A) can be calculated based on this complete impulse response. For binaural simulation, the impulse responses of two points, each of which was 0.08 m away from the receiving point were considered as the binaural impulse response. They were then convoluted with any anechoic signal in time domain using the fast Fourier transform algorithm. This subsystem of auralization was tested on real acoustical spaces to compare real sound signals and the corresponding reproduced ones. The subsystem of visualization was designed to build an interface for data input and output and to show the structure of the enclosure and status of sound sources and receivers. By using computer language C++ these two subsystems were combined, therefore the complete system can be conveniently used on a personal computer. [Project supported by the Doctorate Foundation of Northwestern Polytechnical University.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2001
    detail.hit.zdb_id: 1461063-2
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