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John A. Kosinski - One of the best experts on this subject based on the ideXlab platform.
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Experimental measurements of the force-Frequency Effect of thickness-mode langasite resonators
IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2013Co-Authors: Haifeng Zhang, Joseph A. Turner, John A. KosinskiAbstract:Because of their excellent temperature behavior, high piezoelectric coupling, low acoustic loss, and high Q-factor, langasite resonators have been the subject of recent interest for use in a variety of applications. The force-Frequency Effect refers to the phenomenon of Frequency changes resulting from the stress applied to the resonator. A clear understanding of this Effect is essential for many design applications such as force sensors and stress-compensated resonators. In this article, we report on experimental measurements of the force- Frequency Effect of various doubly-rotated langasite resonator samples with plano-plano configurations. Comparisons with the available experimental data for the force-Frequency Effect of quartz resonators are made. The application of this Effect for sensors and stress-compensated resonators is also discussed.
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Force-Frequency Effect of thickness mode langasite resonators.
Ultrasonics, 2009Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Abstract Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss and high Q factor. The force–Frequency Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. A clear understanding of this Effect is essential for many design applications such as pressure sensors. In this article, the Frequency shift is analyzed theoretically and numerically for thin, circular langasite plates subjected to a pair of diametrical forces. In addition, the sensitivity of the force–Frequency Effect is analyzed with respect to the nonlinear material constants. The results are anticipated to be valuable for experimental measurements of nonlinear material constants as well as for device design.
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Determination of third-order elastic constants of langasite single crystals through force-Frequency Effect.
Journal of the Acoustical Society of America, 2007Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss, and high Q factor. Third‐order elastic constants are responsible for many nonlinear Effects associated with langasite resonators including the force‐Frequency Effect. This Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. The determination of the third‐order elastic constants through the force‐Frequency Effect relies on an accurate theoretical understanding of this Effect. In this article, expressions for the Frequency shift of langasite resonators subjected to a pair of diametric forces are obtained using the perturbation integral in conjunction with the finite element method. Experimental measurements of the force‐Frequency Effect for various langasite resonator samples with plano‐plano configuration are also discussed. The third‐order elastic constants of langasite single ...
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Force‐Frequency Effect of thickness mode langasite resonators
Journal of the Acoustical Society of America, 2006Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss, and high Q factor. The force‐Frequency Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. A clear understanding of this Effect is essential for many design applications such as pressure sensors. In this presentation, the Frequency shift is analyzed theoretically and numerically for thin, circular langasite plates subjected to a diametrical force. The results are compared with experimental measurements of the same system for a variety of langasite resonators with various material orientations. In addition, the sensitivity of force‐Frequency Effect is analyzed with respect to the nonlinear material constants. A comparison between the force‐Frequency Effect of langasite and quartz resonators is also made. Finally, the application of such measurements for determining third‐order e...
Haifeng Zhang - One of the best experts on this subject based on the ideXlab platform.
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A new apparatus for the measurement of force-Frequency Effect of crystal resonators
Measurement, 2016Co-Authors: Thanh Tuong Pham, Haifeng ZhangAbstract:Abstract We describe an apparatus for the measurement of the force-Frequency Effect of crystal resonators. The force-Frequency Effect is the correlation between the force put on the crystal resonator and the relative resonant Frequency of the resonator to the input force. The new apparatus has been designed and manufactured to measure the force sensitivity coefficient K f (m s/N), which relates to parameters such as crystal geometry, orientation angle, and force direction (azimuth angle). The new loading device has a better force resolution and is simpler to adjust for force alignment than traditional level-loading devices. In order to validate this new loading device, sample experiment tests have been performed, and a comparison of the experiment outcomes with peers’ measurement results show a good agreement.
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Experimental measurements of the force-Frequency Effect of thickness-mode langasite resonators
IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2013Co-Authors: Haifeng Zhang, Joseph A. Turner, John A. KosinskiAbstract:Because of their excellent temperature behavior, high piezoelectric coupling, low acoustic loss, and high Q-factor, langasite resonators have been the subject of recent interest for use in a variety of applications. The force-Frequency Effect refers to the phenomenon of Frequency changes resulting from the stress applied to the resonator. A clear understanding of this Effect is essential for many design applications such as force sensors and stress-compensated resonators. In this article, we report on experimental measurements of the force- Frequency Effect of various doubly-rotated langasite resonator samples with plano-plano configurations. Comparisons with the available experimental data for the force-Frequency Effect of quartz resonators are made. The application of this Effect for sensors and stress-compensated resonators is also discussed.
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Force-Frequency Effect of thickness mode langasite resonators.
Ultrasonics, 2009Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Abstract Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss and high Q factor. The force–Frequency Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. A clear understanding of this Effect is essential for many design applications such as pressure sensors. In this article, the Frequency shift is analyzed theoretically and numerically for thin, circular langasite plates subjected to a pair of diametrical forces. In addition, the sensitivity of the force–Frequency Effect is analyzed with respect to the nonlinear material constants. The results are anticipated to be valuable for experimental measurements of nonlinear material constants as well as for device design.
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Determination of third-order elastic constants of langasite single crystals through force-Frequency Effect.
Journal of the Acoustical Society of America, 2007Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss, and high Q factor. Third‐order elastic constants are responsible for many nonlinear Effects associated with langasite resonators including the force‐Frequency Effect. This Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. The determination of the third‐order elastic constants through the force‐Frequency Effect relies on an accurate theoretical understanding of this Effect. In this article, expressions for the Frequency shift of langasite resonators subjected to a pair of diametric forces are obtained using the perturbation integral in conjunction with the finite element method. Experimental measurements of the force‐Frequency Effect for various langasite resonator samples with plano‐plano configuration are also discussed. The third‐order elastic constants of langasite single ...
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Force‐Frequency Effect of thickness mode langasite resonators
Journal of the Acoustical Society of America, 2006Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss, and high Q factor. The force‐Frequency Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. A clear understanding of this Effect is essential for many design applications such as pressure sensors. In this presentation, the Frequency shift is analyzed theoretically and numerically for thin, circular langasite plates subjected to a diametrical force. The results are compared with experimental measurements of the same system for a variety of langasite resonators with various material orientations. In addition, the sensitivity of force‐Frequency Effect is analyzed with respect to the nonlinear material constants. A comparison between the force‐Frequency Effect of langasite and quartz resonators is also made. Finally, the application of such measurements for determining third‐order e...
Marina Laganaro - One of the best experts on this subject based on the ideXlab platform.
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Is there a syllable Frequency Effect in aphasia or in apraxia of speech or both
Aphasiology, 2008Co-Authors: Marina LaganaroAbstract:Background: The observation of a syllable Frequency Effect on production latencies in healthy speakers has been an argument in favour of stored syllables in speech production. In Levelt, Roelofs, and Meyer's (1999) model of speech production, syllabic representations are accessed during phonetic encoding. Neurolinguistic studies have provided convergent evidence of a syllable Frequency Effect on production accuracy in speakers with acquired language disorders. However, the observation that syllable Frequency also affected production in aphasic speakers with a pre‐phonetic impairment (conduction aphasia and Wernicke's aphasia) seems in contradiction to the phonetic locus of syllabic representations. Aims: We illustrate the points of convergences and divergences between psycholinguistic and neurolinguistic results on the locus of the syllable Frequency Effect and explore whether a syllable Frequency Effect is observed in apraxia of speech (AoS) and in conduction aphasia when participants are tested with the...
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On the locus of the syllable Frequency Effect in speech production
Journal of Memory and Language, 2006Co-Authors: Marina Laganaro, F.-xavier AlarioAbstract:The observation of a syllable Frequency Effect in naming latencies has been an argument in favor of a functional role of stored syllables in speech production. Accordingly, various theoretical models postulate that a repository of syllable representations is accessed during phonetic encoding. However, the direct empirical evidence for locating the syllable Frequency Effect at this level, rather than at the phonological or motor programming levels, is scarce. To investigate the origin of this Effect, we conducted six experiments involving immediate and delayed production, with or without an interfering task (articulatory suppression). Previous evidence from psycholinguistic and short-term memory studies allows the working hypothesis that this interfering task disrupts phonetic processing, while leaving phonological encoding relatively intact. Experiments 1 and 3 showed a syllable Frequency Effect in immediate pseudo-word production and picture naming, respectively. Experiments 2 and 4 required delayed naming (participants produced the items after a short delay, upon presentation of a response cue). The delay was or was not filled with articulatory suppression. The syllable Frequency Effect was not observed in standard delayed naming. By contrast, it was observed when the delay was filled with articulatory suppression. The Effects for words and pseudo-words were highly similar. This pattern of results is interpreted as evidence that syllable Frequency affects the stage of phonetic encoding. This interpretation is consistent with the previously postulated hypothesis that phonetic encoding involves the retrieval of syllable sized representations.
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Syllable Frequency Effect in speech production: evidence from aphasia
Journal of Neurolinguistics, 2005Co-Authors: Marina LaganaroAbstract:Abstract In this study, we investigated whether a syllable Frequency Effect can be observed in aphasic speakers with a phonological encoding impairment. First of all, we analysed the substitution errors from seven aphasic subjects comparing the Frequency of the target syllable to the Frequency of the produced syllable. A significant Effect of syllable Frequency was observed on three subjects' errors and this Effect was independent of phoneme Frequency in two of them. Secondly, we examined whether syllable Frequency can affect the production accuracy on a non-word repetition task. Two aphasic subjects produced significantly more correct responses to non-words composed of high Frequency than of low Frequency syllables. Finally, syllable Frequency was manipulated in monosyllabic words and we analysed the performance and the errors of a single case aphasic subject producing phonemic paraphasias on monosyllabic words. No syllable Frequency Effect was observed on performance, but a syllable Frequency Effect arose in the error analysis. Taken together, our results provide evidence for a syllable Frequency Effect in some aphasic subjects with phonological encoding disorders, supporting the idea of a representation of syllables in speech production.
Youan Kwon - One of the best experts on this subject based on the ideXlab platform.
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Word Frequency Effect and Word Similarity Effect in Korean Lexical Decision Task and Their Computational Model
Lecture Notes in Computer Science, 2020Co-Authors: Youan Kwon, Kinam Park, Soon Young JungAbstract:In this paper, we investigate whether the word Frequency Effect and the word similarity Effect could be applied to Korean lexical decision task (henceforth, LDT). Also we propose a computational model of Korean LDT and present comparison results between human and computational model on Korean LDT. We found that the word Frequency Effect and the similarity Effect in Korean LDT were language general phenomena in both the behavioral experiment and the proposed computational simulation.
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The role of orthographic syllable Frequency in the syllable Frequency Effect: evidence from Korean.
Perceptual and Motor Skills, 2015Co-Authors: Youan KwonAbstract:Summary.—There have been ongoing debates as to whether the syllable Frequency Effect is dependent purely on phonological representation or is also affected by the orthographic representation of the syllable. In two experiments, the authors investigated the Effect of the phonologic and orthographic frequencies on the syllable Frequency Effect by manipulating the first syllable's phonologic (high vs low) and orthographic (high vs low) Frequency. Analyses of variance were performed for the lexical decision latencies and error rates in two experiments. Overall, the results of the current experiments showed Effects of phonological syllable Frequency on lexical decision latencies. Additionally, the results of the current experiments also showed the influence of the orthographic syllable Frequency in the form of an interaction between the phonologic and orthographic frequencies. Longer latencies and higher error rates for higher phonological syllable Frequency occurred only when the target word had low orthograp...
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The Syllable Frequency Effect in Semantic Categorization Tasks in Korean
Ksii Transactions on Internet and Information Systems, 2011Co-Authors: Youan KwonAbstract:Previous studies of syllable Frequency Effects have proposed that inhibitory Effects due to high first syllable Frequency were the products of competitions between activated lexical candidates within a lexical level. However, these studies have primarily used lexical decision tasks to examine the nature of syllable Frequency Effects. This study investigates whether a syllable Frequency Effect can arise in semantic categorization tasks and whether phonologically or orthographically defined syllables interact with semantically related variables such as morphological family size. If the syllable Frequency Effect was created by activations and competitions on a lexical level, it is highly possible that the Effect was related to semantic categorization tasks. To test this hypothesis, we conducted two experiments. In Experiment 1, morphological family size and phonological syllable Frequency were factorially manipulated. In Experiment 2, morphological family size and orthographic syllable Frequency were factorially manipulated. The results demonstrate that morphemes have no relationship with phonological syllables but do with orthographic syllables. This suggests that phonological syllables and orthographic syllables have different roles in the syllable Frequency Effect on visual word recognition process.
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ICONIP (3) - Word Frequency Effect and word similarity Effect in korean lexical decision task and their computational model
Neural Information Processing, 2006Co-Authors: Youan Kwon, Kinam Park, Soon Young JungAbstract:In this paper, we investigate whether the word Frequency Effect and the word similarity Effect could be applied to Korean lexical decision task (henceforth, LDT). Also we propose a computational model of Korean LDT and present comparison results between human and computational model on Korean LDT. We found that the word Frequency Effect and the similarity Effect in Korean LDT were language general phenomena in both the behavioral experiment and the proposed computational simulation.
Joseph A. Turner - One of the best experts on this subject based on the ideXlab platform.
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Experimental measurements of the force-Frequency Effect of thickness-mode langasite resonators
IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2013Co-Authors: Haifeng Zhang, Joseph A. Turner, John A. KosinskiAbstract:Because of their excellent temperature behavior, high piezoelectric coupling, low acoustic loss, and high Q-factor, langasite resonators have been the subject of recent interest for use in a variety of applications. The force-Frequency Effect refers to the phenomenon of Frequency changes resulting from the stress applied to the resonator. A clear understanding of this Effect is essential for many design applications such as force sensors and stress-compensated resonators. In this article, we report on experimental measurements of the force- Frequency Effect of various doubly-rotated langasite resonator samples with plano-plano configurations. Comparisons with the available experimental data for the force-Frequency Effect of quartz resonators are made. The application of this Effect for sensors and stress-compensated resonators is also discussed.
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Force-Frequency Effect of thickness mode langasite resonators.
Ultrasonics, 2009Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Abstract Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss and high Q factor. The force–Frequency Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. A clear understanding of this Effect is essential for many design applications such as pressure sensors. In this article, the Frequency shift is analyzed theoretically and numerically for thin, circular langasite plates subjected to a pair of diametrical forces. In addition, the sensitivity of the force–Frequency Effect is analyzed with respect to the nonlinear material constants. The results are anticipated to be valuable for experimental measurements of nonlinear material constants as well as for device design.
-
Determination of third-order elastic constants of langasite single crystals through force-Frequency Effect.
Journal of the Acoustical Society of America, 2007Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss, and high Q factor. Third‐order elastic constants are responsible for many nonlinear Effects associated with langasite resonators including the force‐Frequency Effect. This Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. The determination of the third‐order elastic constants through the force‐Frequency Effect relies on an accurate theoretical understanding of this Effect. In this article, expressions for the Frequency shift of langasite resonators subjected to a pair of diametric forces are obtained using the perturbation integral in conjunction with the finite element method. Experimental measurements of the force‐Frequency Effect for various langasite resonator samples with plano‐plano configuration are also discussed. The third‐order elastic constants of langasite single ...
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Force‐Frequency Effect of thickness mode langasite resonators
Journal of the Acoustical Society of America, 2006Co-Authors: Haifeng Zhang, Joseph A. Turner, Jiashi Yang, John A. KosinskiAbstract:Langasite resonators are of recent interest for a variety of applications because of their good temperature behavior, good piezoelectric coupling, low acoustic loss, and high Q factor. The force‐Frequency Effect describes the shift in resonant Frequency a resonator experiences due to the application of a mechanical load. A clear understanding of this Effect is essential for many design applications such as pressure sensors. In this presentation, the Frequency shift is analyzed theoretically and numerically for thin, circular langasite plates subjected to a diametrical force. The results are compared with experimental measurements of the same system for a variety of langasite resonators with various material orientations. In addition, the sensitivity of force‐Frequency Effect is analyzed with respect to the nonlinear material constants. A comparison between the force‐Frequency Effect of langasite and quartz resonators is also made. Finally, the application of such measurements for determining third‐order e...
