Journal articles: 'Cross-modal comparison'

1

Ljungberg, Jessica K., and Fabrice B. R. Parmentier. "Cross-Modal Distraction by Deviance." Experimental Psychology 59, no. 6 (January 1, 2012): 355–63. http://dx.doi.org/10.1027/1618-3169/a000164.

Full text

Abstract:

Unexpected task-irrelevant changes in the auditory or visual sensory channels have been shown to capture attention in an ineluctable manner and distract participants away from ongoing auditory or visual categorization tasks. We extend the study of this phenomenon by reporting the first within-participant comparison of deviance distraction in the tactile and auditory modalities. Using vibro-tactile-visual and auditory-visual cross-modal oddball tasks, we found that unexpected changes in the tactile and auditory modalities produced a number of functional similarities: A negative impact of distracter deviance on performance in the ongoing visual task, distraction on the subsequent trial (post-deviance distraction), and a similar decrease – but not the disappearance – of these effects across blocks. Despite these functional similarities, deviance distraction only correlated between the auditory and tactile modalities for the accuracy-based measure of deviance distraction and not for response latencies. Post-deviance distraction showed no correlation between modalities. Overall, the results suggest that behavioral deviance distraction may be underpinned by both modality-specific and multimodal mechanisms, while post-deviance distraction may predominantly relate to modality-specific processes.

APA, Harvard, Vancouver, ISO, and other styles

2

Ueda, Yoshiyuki, and Jun Saiki. "Characteristics of Eye Movements in 3-D Object Learning: Comparison between Within-Modal and Cross-Modal Object Recognition." Perception 41, no. 11 (January 1, 2012): 1289–98. http://dx.doi.org/10.1068/p7257.

Full text

Abstract:

Recent studies have indicated that the object representation acquired during visual learning depends on the encoding modality during the test phase. However, the nature of the differences between within-modal learning (eg visual learning-visual recognition) and cross-modal learning (eg visual learning – haptic recognition) remains unknown. To address this issue, we utilised eye movement data and investigated object learning strategies during the learning phase of a cross-modal object recognition experiment. Observers informed of the test modality studied an unfamiliar visually presented 3-D object. Quantitative analyses showed that recognition performance was consistent regardless of rotation in the cross-modal condition, but was reduced when objects were rotated in the within-modal condition. In addition, eye movements during learning significantly differed between within-modal and cross-modal learning. Fixations were more diffused for cross-modal learning than in within-modal learning. Moreover, over the course of the trial, fixation durations became longer in cross-modal learning than in within-modal learning. These results suggest that the object learning strategies employed during the learning phase differ according to the modality of the test phase, and that this difference leads to different recognition performances.

APA, Harvard, Vancouver, ISO, and other styles

3

Reid, Andrew T., John Lewis, Gleb Bezgin, Budhachandra Khundrakpam, Simon B. Eickhoff, Anthony R. McIntosh, Pierre Bellec, and Alan C. Evans. "A cross-modal, cross-species comparison of connectivity measures in the primate brain." NeuroImage 125 (January 2016): 311–31. http://dx.doi.org/10.1016/j.neuroimage.2015.10.057.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Reid, Andrew T., Felix Hoffstaedter, Gaolang Gong, Angela R. Laird, Peter Fox, Alan C. Evans, Katrin Amunts, and Simon B. Eickhoff. "A seed-based cross-modal comparison of brain connectivity measures." Brain Structure and Function 222, no. 3 (July 2, 2016): 1131–51. http://dx.doi.org/10.1007/s00429-016-1264-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Zeshan, Ulrike, and Nick Palfreyman. "Comparability of signed and spoken languages: Absolute and relative modality effects in cross-modal typology." Linguistic Typology 24, no. 3 (October 25, 2020): 527–62. http://dx.doi.org/10.1515/lingty-2020-2059.

Full text

Abstract:

AbstractThis article sets out a conceptual framework and typology of modality effects in the comparison of signed and spoken languages. This is essential for a theory of cross-modal typology. We distinguish between relative modality effects, where a linguistic structure is markedly more common in one modality than in the other, and absolute modality effects, where a structure does not occur in one of the modalities at all. Using examples from a wide variety of sign languages, we discuss examples at the levels of phonology, morphology (including numerals, negation, and aspect) and semantics. At the phonological level, the issue of iconically motivated sub-lexical components in signs, and parallels with sound symbolism in spoken languages, is particularly pertinent. Sensory perception metaphors serve as an example for semantic comparison across modalities. Advocating an inductive approach to cross-modal comparison, we discuss analytical challenges in defining what is comparable across the signed and spoken modalities, and in carrying out such comparisons in a rigorous and empirically substantiated way.

APA, Harvard, Vancouver, ISO, and other styles

6

He, Chao, Dalin Wang, Zefu Tan, Liming Xu, and Nina Dai. "Cross-Modal Discrimination Hashing Retrieval Using Variable Length." Security and Communication Networks 2022 (September 9, 2022): 1–12. http://dx.doi.org/10.1155/2022/9638683.

Full text

Abstract:

Fast cross-modal retrieval technology based on hash coding has become a hot topic for the rich multimodal data (text, image, audio, etc.), especially security and privacy challenges in the Internet of Things and mobile edge computing. However, most methods based on hash coding are only mapped to the common hash coding space, and it relaxes the two value constraints of hash coding. Therefore, the learning of the multimodal hash coding may not be sufficient and effective to express the original multimodal data and cause the hash encoding category to be less discriminatory. For the sake of solving these problems, this paper proposes a method of mapping each modal data to the optimal length of hash coding space, respectively, and then the hash encoding of each modal data is solved by the discrete cross-modal hash algorithm of two value constraints. Finally, the similarity of multimodal data is compared in the potential space. The experimental results of the cross-model retrieval based on variable hash coding are better than that of the relative comparison methods in the WIKI data set, NUS-WIDE data set, as well as MIRFlickr data set, and the method we proposed is proved to be feasible and effective.

APA, Harvard, Vancouver, ISO, and other styles

7

MILLER, A. KATE. "Facilitating the task for second language processing research: A comparison of two testing paradigms." Applied Psycholinguistics 36, no. 3 (July 8, 2013): 613–37. http://dx.doi.org/10.1017/s0142716413000362.

Full text

Abstract:

ABSTRACTThis study considers the effects of experimental task demands in research on second language sentence processing. Advanced learners and native speakers of French were presented with the same experimental sentences in two different tasks designed to probe for evidence of trace reactivation during processing: cross-modal priming (Nicol & Swinney, 1989) and probe classification during reading (Dekydtspotter, Miller, Schaefer, Chang, & Kim, 2010). Although the second language learners produced nontargetlike results on the cross-modal priming task, the probe classification during reading task revealed results suggestive of trace reactivation, which point to detailed structural representations during online sentence processing. The implications for current theories of second language sentence processing and for future research in this domain are discussed.

APA, Harvard, Vancouver, ISO, and other styles

8

Li, Xiang-Dong, and Barbara Romanowicz. "Comparison of global waveform inversions with and without considering cross-branch modal coupling." Geophysical Journal International 121, no. 3 (June 1995): 695–709. http://dx.doi.org/10.1111/j.1365-246x.1995.tb06432.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Petrosino, Linda, Donald Fucci, Daniel Harris, and Elizabeth Randolph-Tyler. "Lingual Vibrotactile/Auditory Magnitude Estimation and Cross-Modal Matching: Comparison of Suprathreshold Responses in Men and Women." Perceptual and Motor Skills 67, no. 1 (August 1988): 291–300. http://dx.doi.org/10.2466/pms.1988.67.1.291.

Full text

Abstract:

The purpose of this study was to investigate the response patterns of men and women to suprathreshold lingual-vibrotactile and auditory stimulation. The psychophysical methods of magnitude estimation and cross-modal matching were used on a group of 10 men ( M age = 19.6 yr.) and 10 women ( M age = 20.2 yr.). Analysis showed that the men and women performed differently on the magnitude-estimation tasks and similarly on the cross-modal matching tasks. These results suggested that sex differences on suprathreshold psychophysical scaling may be related to the way men and women use numbers as opposed to possible differences in the perception of suprathreshold sensory stimuli by men and women.

APA, Harvard, Vancouver, ISO, and other styles

10

Zhang, Bin, Huaxiang Zhang, Jiande Sun, Zhenhua Wang, Hongchen Wu, and Xiao Dong. "Modality-Reconstructed Cross-Media Retrieval via Sparse Neural Networks Pre-Trained by Restricted Boltzmann Machines." Journal of Advanced Computational Intelligence and Intelligent Informatics 22, no. 5 (September 20, 2018): 611–20. http://dx.doi.org/10.20965/jaciii.2018.p0611.

Full text

Abstract:

Cross-media retrieval has raised a lot of research interests, and a significant number of works focus on mapping the heterogeneous data into a common subspace using a couple of projection matrices corresponding to each modal data before implementing similarity comparison. Differently, we reconstruct one modal data (e.g., images) to the other one (e.g., texts) using a model named sparse neural network pre-trained by Restricted Boltzmann Machines (MRCR-RSNN) so that we can project one modal data into the space of the other one directly. In the model, input is low-level features of one modal data and output is the other one. And cross-media retrieval is implemented based on the similarities of their representatives. Our model need not any manual annotation and its application is more widely. It is simple but effective. We evaluate the performance of our method on several benchmark datasets, and experimental results prove its effectiveness based on the Mean Average Precision (MAP) and Precision Recall (PR).

APA, Harvard, Vancouver, ISO, and other styles

11

Martinek, Jan, and Ladislav Carbol. "Comparison of Modal Analysis Using FEM and Eigenfrequency Measurements." Advanced Materials Research 1124 (September 2015): 294–300. http://dx.doi.org/10.4028/www.scientific.net/amr.1124.294.

Full text

Abstract:

In ultrasonic testing the vibration spectrum must be understood and the measured frequency peaks should match specific sample characteristics. In this paper, the experimental data are compared with results obtained using modal analysis based on Finite Element Method and the vibration was also calculated using classical Euler-Bernoulli approach, which is very simple but somewhat limited. The specimen geometry as well as the material of choice are both very simple to predict, model and measure - i.e. round cross section metal rod. In this case the FEM gives slightly better result that the simplified analytical calculation.

APA, Harvard, Vancouver, ISO, and other styles

12

Nikishena, I. S., V. A. Ponomarev, and Yu D. Kropotov. "Event-related Potentials in Audio–Visual Cross-Modal Test for Comparison of Word Pairs." Human Physiology 47, no. 4 (July 2021): 459–66. http://dx.doi.org/10.1134/s0362119721020109.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Shaul, Shelley. "Visual, Auditory and Cross Modal Lexical Decision: A Comparison between Dyslexic and Typical Readers." Psychology 05, no. 16 (2014): 1855–69. http://dx.doi.org/10.4236/psych.2014.516191.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Nikishena, I. S., V. A. Ponomarev, and J. D. Kropotov. "Event-Related Potentials in a Cross-Modal Test with Comparison of Pairs of Words." Журнал эволюционной биохимии и физиологии 56, no. 7 (2020): 785. http://dx.doi.org/10.31857/s0044452920072139.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Koester, Lynne Sanford, Hanus Papousek, and Mechthild Papousek. "Patterns of Rhythmic Stimulation by Mothers with Three-Month-Olds: A Cross-Modal Comparison." International Journal of Behavioral Development 12, no. 2 (June 1989): 143–54. http://dx.doi.org/10.1177/016502548901200201.

Full text

Abstract:

The purpose of this research was to examine the nature of the temporally patterned stimulation provided spontaneously by parents to their infants. This study provides microanalytic descriptions of the temporally patterned non-vocal behaviours used by 17 mothers during brief, videotaped interactions with their 3-month-olds. Results indicated significant effects of type of maternal behaviour and infant attention on 'tempo of rhythmic behaviours; one detailed example illustrates the dynamics of interactions within an individual dyad. It is asserted that the aspects of non-vocal communication investigated here are part of a repertoire of intuitive parental behaviours which support the infant's early integrative competence and adaptation to the social world.

APA, Harvard, Vancouver, ISO, and other styles

16

Peoples, J. A., R. J. Robertson, P. D. Thompson, N. B. Millich, F. L. Goss, and N. M. Moyna. "CROSS-MODAL COMPARISON OF PERCENT PEAK OXYGEN UPTAKE AT FIXED LEVELS OF PERCEIVED EXERTION 1223." Medicine &amp Science in Sports &amp Exercise 29, Supplement (May 1997): 214. http://dx.doi.org/10.1097/00005768-199705001-01221.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

HERZ, RACHEL S. "Are Odors the Best Cues to Memory? A Cross-Modal Comparison of Associative Memory Stimulia." Annals of the New York Academy of Sciences 855, no. 1 OLFACTION AND (November 1998): 670–74. http://dx.doi.org/10.1111/j.1749-6632.1998.tb10643.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Silvester, Joanne, Neil Anderson, Emma Haddleton, Nicole Cunningham‐Snell, and Andy Gibb. "A Cross‐Modal Comparison of Telephone and Face‐to‐Face Selection Interviews in Graduate Recruitment." International Journal of Selection and Assessment 8, no. 1 (March 2000): 16–21. http://dx.doi.org/10.1111/1468-2389.00127.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Tran, Tuan D., and Eugene R. Delay. "Comparison of compound and cross-modal training on postoperative visual relearning of visual decorticate rats." Behavioural Brain Research 79, no. 1-2 (September 1996): 137–43. http://dx.doi.org/10.1016/0166-4328(96)00008-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Chen, Bing Zhi, Zhi Dong Lv, Su Ming Xie, and Wen Zhong Zhao. "Anti-Crashing Energy-Absorbing Simulation and Optimization of Thin-Walled Components." Advanced Materials Research 201-203 (February 2011): 347–55. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.347.

Full text

Abstract:

Higher speed and loading capacity of trains nowadays have aroused higher ability of crashworthiness, which could be effectively improved by well-designed energy absorbing structures. The thin-walled components, the most traditional and effective energy absorbing device, have been widely used for design of energy absorbing device. As a result, the thin-walled components are used as an example to examine the process of axial compression of it. A comparison of a dynamic compressing simulation on fold-collapse tube and the experimental result of it is made, which shows the two matches very well. Based on this comparison, a further research and optimization on the thin-walled energy absorbing components is implemented. With the material modal and finite element modal of this component, a research on the simulation of PAM-CRASH, the crashing finite element Software, is implemented on such component with different shapes of cross-section, different thickness and square cross-sections with single-cell and multi-cell. What's more, suggestions on such thin-walled components energy absorbing structure is given based on the analysis of the parameters of the simulation.

APA, Harvard, Vancouver, ISO, and other styles

21

Bellis, Teri James, Cassie Billiet, and Jody Ross. "The Utility of Visual Analogs of Central Auditory Tests in the Differential Diagnosis of (Central) Auditory Processing Disorder and Attention Deficit Hyperactivity Disorder." Journal of the American Academy of Audiology 22, no. 08 (September 2011): 501–14. http://dx.doi.org/10.3766/jaaa.22.8.3.

Full text

Abstract:

Background: Cacace and McFarland (2005) have suggested that the addition of cross-modal analogs will improve the diagnostic specificity of (C)APD (central auditory processing disorder) by ensuring that deficits observed are due to the auditory nature of the stimulus and not to supra-modal or other confounds. Others (e.g., Musiek et al, 2005) have expressed concern about the use of such analogs in diagnosing (C)APD given the uncertainty as to the degree to which cross-modal measures truly are analogous and emphasize the nonmodularity of the CANs (central auditory nervous system) and its function, which precludes modality specificity of (C)APD. To date, no studies have examined the clinical utility of cross-modal (e.g., visual) analogs of central auditory tests in the differential diagnosis of (C)APD. Purpose: This study investigated performance of children diagnosed with (C)APD, children diagnosed with ADHD (attention deficit hyperactivity disorder), and typically developing children on three diagnostic tests of central auditory function and their corresponding visual analogs. The study sought to determine whether deficits observed in the (C)APD group were restricted to the auditory modality and the degree to which the addition of visual analogs aids in the ability to differentiate among groups. Research Design: An experimental repeated measures design was employed. Study Sample: Participants consisted of three groups of right-handed children (normal control, n = 10; ADHD, n = 10; (C)APD, n = 7) with normal and symmetrical hearing sensitivity, normal or corrected-to-normal visual acuity, and no family or personal history of disorders unrelated to their primary diagnosis. Participants in Groups 2 and 3 met current diagnostic criteria for ADHD and (C)APD. Data Collection and Analysis: Visual analogs of three tests in common clinical use for the diagnosis of (C)APD were used (Dichotic Digits [Musiek, 1983]; Frequency Patterns [Pinheiro and Ptacek, 1971]; and Duration Patterns [Pinheiro and Musiek, 1985]). Participants underwent two 1 hr test sessions separated by at least 1 wk. Order of sessions (auditory, visual) and tests within each session were counterbalanced across participants. ANCOVAs (analyses of covariance) were used to examine effects of group, modality, and laterality (Dichotic/Dichoptic Digits) or response condition (auditory and visual patterning). In addition, planned univariate ANCOVAs were used to examine effects of group on intratest comparison measures (REA, HLD [Humming-Labeling Differential]). Results: Children with both ADHD and (C)APD performed more poorly overall than typically developing children on all tasks, with the (C)APD group exhibiting the poorest performance on the auditory and visual patterns tests but the ADHD and (C)APD group performing similarly on the Dichotic/Dichoptic Digits task. However, each of the auditory and visual intratest comparison measures, when taken individually, was able to distinguish the (C)APD group from both the normal control and ADHD groups, whose performance did not differ from one another. Conclusions: Results underscore the importance of intratest comparison measures in the interpretation of central auditory tests (American Speech-Language-Hearing Association [ASHA], 2005; American Academy of Audiology [AAA], 2010). Results also support the “non-modular” view of (C)APD in which cross-modal deficits would be predicted based on shared neuroanatomical substrates. Finally, this study demonstrates that auditory tests alone are sufficient to distinguish (C)APD from supra-modal disorders, with cross-modal analogs adding little if anything to the differential diagnostic process.

APA, Harvard, Vancouver, ISO, and other styles

22

Su, Ning, Zhenggang Cao, and Yue Wu. "Fast Frequency-Domain Algorithm for Estimating the Dynamic Wind-Induced Response of Large-Span Roofs Based on Cauchy’s Residue Theorem." International Journal of Structural Stability and Dynamics 18, no. 03 (February 27, 2018): 1850037. http://dx.doi.org/10.1142/s0219455418500372.

Full text

Abstract:

Wind-induced response analysis is an important process in the design of large-span roofs. Conventional time-domain methods are computationally more expensive than frequency-domain algorithms; however, the latter are not as accurate because of the ill-treatment of the modal coupling effects. This paper revisited the derivations of the frequency-domain algorithm and proposed a fast algorithm for estimating the dynamic wind-induced response considering duly the modal coupling effects. With the wind load cross-spectra modeled by rational functions, closed-form solutions to the frequency-domain integrals can be calculated by Cauchy’s residue theorem, rather than by numerical integration, thereby reducing the truncation errors and enhancing the efficiency of computation. The algorithm is applied to the analysis of a grandstand roof and a spherical dome. Through comparison with time domain analyses results, the algorithm is proved to be reliable. A criterion of the coupling modal combination was suggested based on the cumulative modal contribution rate of over 70%.

APA, Harvard, Vancouver, ISO, and other styles

23

Reynolds, Thomas, Daniele Casagrande, and Roberto Tomasi. "Comparison of multi-storey cross-laminated timber and timber frame buildings by in situ modal analysis." Construction and Building Materials 102 (January 2016): 1009–17. http://dx.doi.org/10.1016/j.conbuildmat.2015.09.056.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Yin, Xiuye, and Liyong Chen. "A Cross-Modal Image and Text Retrieval Method Based on Efficient Feature Extraction and Interactive Learning CAE." Scientific Programming 2022 (January 10, 2022): 1–12. http://dx.doi.org/10.1155/2022/7314599.

Full text

Abstract:

In view of the complexity of the multimodal environment and the existing shallow network structure that cannot achieve high-precision image and text retrieval, a cross-modal image and text retrieval method combining efficient feature extraction and interactive learning convolutional autoencoder (CAE) is proposed. First, the residual network convolution kernel is improved by incorporating two-dimensional principal component analysis (2DPCA) to extract image features and extracting text features through long short-term memory (LSTM) and word vectors to efficiently extract graphic features. Then, based on interactive learning CAE, cross-modal retrieval of images and text is realized. Among them, the image and text features are respectively input to the two input terminals of the dual-modal CAE, and the image-text relationship model is obtained through the interactive learning of the middle layer to realize the image-text retrieval. Finally, based on Flickr30K, MSCOCO, and Pascal VOC 2007 datasets, the proposed method is experimentally demonstrated. The results show that the proposed method can complete accurate image retrieval and text retrieval. Moreover, the mean average precision (MAP) has reached more than 0.3, the area of precision-recall rate (PR) curves are better than other comparison methods, and they are applicable.

APA, Harvard, Vancouver, ISO, and other styles

25

Iwaniec, Joanna, and Piotr Kurowski. "Experimental verification of selected methods sensitivity to damage size and location." Journal of Vibration and Control 23, no. 7 (August 9, 2016): 1133–51. http://dx.doi.org/10.1177/1077546315589677.

Full text

Abstract:

The main emphasis of the paper is put on the experimental verification and comparison of classical modal analysis techniques and recurrence plots sensitivity to damage size. Identification experiments were carried out for the laboratory object subjected to random and chirp excitations, respectively. In the course of carried out experiments, the process of damage propagation was simulated by the successive drilling into one of the object elements. Measured time histories of system responses were analyzed with the application of the classical modal analysis, recurrence plots (RP), cross recurrence plots (CRP) and joint recurrence plots (JRP) methods. Obtained results proved that the RP, CRP and JRP methods are much more sensitive to changes in dynamical system properties resulting from damage initialization and propagation than classical modal analysis methods and can be successfully applied to damage detection and tracking changes in the system natural frequencies.

APA, Harvard, Vancouver, ISO, and other styles

26

Jia, You, Zhichun Yang, Erqiang Liu, Yanhong Fan, and Xuexia Yang. "Prediction of random dynamic loads using second-order blind source identification algorithm." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 9 (January 23, 2020): 1720–32. http://dx.doi.org/10.1177/0954406219899412.

Full text

Abstract:

Traditional load identification methods are based on the frequency response function matrix. However, in some cases, it is impossible to measure the frequency response functions directly, where only the measured structural dynamic response data are available. In this paper, a novel frequency domain method based on second-order blind source identification (SOBI) algorithm is proposed for identifying the random dynamic loads from some dynamic responses of limited test points. Firstly, the SOBI algorithm is applied to identify the modal parameters from the time histories of the measured displacement responses and then the modal loads are estimated by the identified modal parameters and modal responses in the modal space; finally, the random dynamic loads can be identified in the frequency domain. In order to control the error propagation, the theoretical formulas of the regularization process have been deduced, and the regularization parameters are selected by the generalized cross-validation method. A numerical simulation and an eight-storey spatial frame experimental model are studied to validate the proposed method; the comparison results show a good agreement between the identified random dynamic loads and the actually exerted loads.

APA, Harvard, Vancouver, ISO, and other styles

27

Yang, Charlotte L., Noelle R. B. Stiles, Carmel A. Levitan, and Shinsuke Shimojo. "Temporal rate adaptation transfers cross-modally at a subconscious level." Seeing and Perceiving 25 (2012): 30. http://dx.doi.org/10.1163/187847612x646523.

Full text

Abstract:

In an earlier study, we demonstrated that the temporal rate adaptation effect can be transferred from audition to vision and vice versa. However, it was unclear whether this effect was due to a top-down cognitive process, or rather to an earlier calibration process which is stimulus-driven and automatic. We therefore examined the effect of interocular masking of the adapting stimuli on the temporal rate adaptation and its cross-modal transfer from vision to audition (VA). Participants were trained, using feedback, to classify repetitive auditory stimuli presented at a range of frequencies (3.25–4.75 Hz) as fast or slow (as compared to the average frequency of 4 Hz). Afterwards, subjects were repeatedly exposed to visual stimuli at a specific rate (3 or 5 Hz). This adaptation stimulus was masked by continuous flash suppression (CFS). During CFS, a stimulus presented to one eye can be suppressed from awareness by a stream of constantly changing images in the other eye. To test whether adaptation resulted from this less visible exposure, participants then performed the same task as in the training, but without feedback. Test and adaptation tasks were presented in 20 alternating blocks. A comparison of the pre- and post-adaptation responses showed cross-modal changes in subjects’ perception of temporal rate. Adaptation to the masked 5 Hz (3 Hz) stimuli led to subsequent stimuli seeming slower (faster) than they had before adaptation. Since the adaptation stimuli were mostly masked by CFS, the results suggest that temporal rate adaptation and its cross-modal transfer occur mostly at a subconscious level.

APA, Harvard, Vancouver, ISO, and other styles

28

Ogbobe, P. O., C. N. Okoye, and N. S. Akonyi. "Cross coupling effects of modal space decoupling control for six degree of freedom 6-DOF parallel mechanism (6 DOF PM)." Nigerian Journal of Technology 41, no. 2 (June 2, 2022): 229–35. http://dx.doi.org/10.4314/njt.v41i2.4.

Full text

Abstract:

This study presented the performance of an alternative and effective control strategy through a decoupled controller by an input and an output transformation matrix, such that each Degrees of Freedom can be tuned independently with their bandwidth raised near to the eigenfrequencies. The simulation results of the Modal Space Decoupled Controller were analyzed in Matlab/Simulink environment and comparison made between the conventional PID controllers based on cross coupling effects. The results indicate that the conventional joint space conforms to the theoretical analysis when the compensation for the coupling effects was not considered. The results further showed that the Modal Space Decoupled Controller modified the dynamics characteristics, which can be attributed to reduction in the coupling effects between degrees of freedom motions.

APA, Harvard, Vancouver, ISO, and other styles

29

Huňady, Róbert, Martin Hagara, and Peter Pavelka. "Comparison of Different Estimation Algorithms Used in the Experimental Determination of Modal Parameters." Applied Mechanics and Materials 816 (November 2015): 412–15. http://dx.doi.org/10.4028/www.scientific.net/amm.816.412.

Full text

Abstract:

The paper deals with the estimation of modal parameters and its main purpose is to compare differences in the values of natural frequencies and damping ratios, which were estimated using three different extraction methods: Rational Fraction Polynomial method, Complex Mode Indicator Function and Polyreference Time Domain Technique. These methods are well suited to the more general application to multi-FRF data, both of the SIMO and the MIMO types. The object of measurement was a freely suspended steel rod of circular cross section. The responses of the analyzed structure were measured by accelerometer and laser vibrometer. The results of these measurements are also discussed in the paper.

APA, Harvard, Vancouver, ISO, and other styles

30

Yu, Yan, Siyu Zou, and Kejie Yin. "A novel detection fusion network for solid waste sorting." International Journal of Advanced Robotic Systems 17, no. 5 (September 1, 2020): 172988142094177. http://dx.doi.org/10.1177/1729881420941779.

Full text

Abstract:

Vision-based object detection technology plays a very important role in the field of computer vision. It is widely used in many machine vision applications. However, in the specific application scenarios, like a solid waste sorting system, it is very difficult to obtain good accuracy due to the color information of objects that is badly damaged. In this work, we propose a novel multimodal convolutional neural network method for RGB-D solid waste object detection. The depth information is introduced as the new modal to improve the object detection performance. Our method fuses two individual features in multiple scales, which forms an end-to-end network. We evaluate our method on the self-constructed solid waste data set. In comparison with single modal detection and other popular cross modal fusion neural networks, our method achieves remarkable results with high validity, reliability, and real-time detection speed.

APA, Harvard, Vancouver, ISO, and other styles

31

Latalski, Jarosław, Marcin Bocheński, and Jerzy Warmiński. "Control of Bending-Bending Coupled Vibrations of a Rotating Thin-Walled Composite Beam." Archives of Acoustics 39, no. 4 (March 1, 2015): 605–13. http://dx.doi.org/10.2478/aoa-2014-0065.

Full text

Abstract:

Abstract The paper presents a study of a possible application of structure embedded piezoelectric actuators to enhance the performance of a rotating composite beam exhibiting the coupled flexural-flexural vibrations. The discussed transversal and lateral bending modal coupling results from the directional properties of the beam's laminate and ply stacking distribution. The mathematical model of the beam is based on an assumption of cross-sectional non-deformability and it incorporates a number of non-classical effects. The final 1-D governing equations of an active composite beam include both orthotropic properties of the laminate and transversely isotropic properties of piezoelectric layers. The system's control capabilities resulting from embedded Macro Fiber Composite piezoelectric actuators are represented by the boundary bending moment. To enhance the dynamic properties of the composite specimen under consideration a combination of linear proportional control strategies has been used. Comparison studies have been performed, including the impact on modal coupling magnitude and cross-over frequency shift.

APA, Harvard, Vancouver, ISO, and other styles

32

Johari, Mansour, Mehdi Keyvan-Ekbatani, and D. Ngoduy. "Traffic dynamics in bi-modal urban networks: a cross-comparison of outflow 2D-NMFD and 3D-NMFD." Transportmetrica B: Transport Dynamics 10, no. 1 (January 21, 2022): 555–85. http://dx.doi.org/10.1080/21680566.2021.2023691.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Yang, Ning Ou, Ying Liang, Chun Yue Huang, and He Geng Wei. "Dynamic Analysis of Communication Cabinet Structure Design." Advanced Materials Research 199-200 (February 2011): 1113–17. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1113.

Full text

Abstract:

Two communication cabinet finite element analysis(FEA) models with different cross-sectional structure vertical columns were set up. Based on the two communication cabinet FEA models, modal analysis was carried out by using the subspace method; the first 6 order natural frequencies and vibration modes were obtained. Harmonic response analysis was also carried out; the displacement response of the communication cabinet structure under external loading was determined. The dynamic performance comparison of the two communication cabinets with different cross-sectional structure vertical columns was performed, as a result, an effective method is provided for communication cabinet dynamic characteristic optimized design.

APA, Harvard, Vancouver, ISO, and other styles

34

Liu, Wei, Wei Cheng Gao, and Hui Li. "Theoretical Research on Two Improved Optimal Sensor Placement Methods." Applied Mechanics and Materials 351-352 (August 2013): 1122–29. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.1122.

Full text

Abstract:

Optimal sensor placement technique plays a key role in structural health monitoring and structural vibration control. Based on the advantages and disadvantages of effective independence (EI) and modal kinetic energy (MKE) methods, two improved optimal sensor placement methods which are Effective Independence - Average Acceleration Amplitude (EI-AAA) method and Effective Independence - Modal Kinetic Energy (EI-MKE) method are proposed in this paper. Firstly the formulas are deduced from modal expansion of multiple-input-multiple-output (MIMO) displacement frequency response function matrix. Then a computational simulation of steel cross beam structure has been implemented to demonstrate the feasibility of the two improved methods above. The obtained optimal sensor locations using the two improved methods are compared with those gained by EI method and MKE method. Finally six classical comparison criteria are employed to demonstrate the advantage and disadvantage of these four methods. The results showed that some innovations proposed in this paper are effective and reliable. The two improved optimal sensor placement methods (EI-AAA method and EI-MKE method) can not only make the truncated mode shapes as linearly independent as possible but also enable the measured modal kinetic energy to maintain the maximum value.

APA, Harvard, Vancouver, ISO, and other styles

35

Kirk, R. G. "Evaluation of Aerodynamic Instability Mechanisms for Centrifugal Compressors—Part I: Current Theory." Journal of Vibration and Acoustics 110, no. 2 (April 1, 1988): 201–6. http://dx.doi.org/10.1115/1.3269499.

Full text

Abstract:

Current theories of calculating levels of aerodynamic excitation are reviewed and methods of applying these results to actual compressor designs are discussed in detail. Comparison of compressor stability for approximate modal aerodynamic excitation influence to published equations for static labyrinth seal cross-coupled stiffness is made to illustrate the influence of system damping on compressor stability. The results of analysis for six operating machines are presented to give further justification for the selection of the aerodynamic excitation model.

APA, Harvard, Vancouver, ISO, and other styles

36

Alais, David, Tam Ho, Shui’er Han, and Erik Van der Burg. "A Matched Comparison Across Three Different Sensory Pairs of Cross-Modal Temporal Recalibration From Sustained and Transient Adaptation." i-Perception 8, no. 4 (July 5, 2017): 204166951771869. http://dx.doi.org/10.1177/2041669517718697.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Maurel, Agnès, Jean-François Mercier, and Simon Félix. "Propagation in waveguides with varying cross section and curvature: a new light on the role of supplementary modes in multi-modal methods." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 470, no. 2166 (June 8, 2014): 20140008. http://dx.doi.org/10.1098/rspa.2014.0008.

Full text

Abstract:

We present an efficient multi-modal method to describe the acoustic propagation in waveguides with varying curvature and cross section. A key feature is the use of a flexible geometrical transformation to a virtual space in which the waveguide is straight and has unitary cross section. In this new space, the pressure field has to satisfy a modified wave equation and associated modified boundary conditions. These boundary conditions are in general not satisfied by the Neumann modes, used for the series representation of the field. Following previous work, an improved modal method (MM) is presented, by means of the use of two supplementary modes. Resulting increased convergences are exemplified by comparison with the classical MM. Next, the following question is addressed: when the boundary conditions are verified by the Neumann modes, does the use of supplementary modes improve or degrade the convergence of the computed solution? Surprisingly, although the supplementary modes degrade the behaviour of the solution at the walls, they improve the convergence of the wavefield and of the scattering coefficients. This sheds a new light on the role of the supplementary modes and opens the way for their use in a wide range of scattering problems.

APA, Harvard, Vancouver, ISO, and other styles

38

Sandford, Jodi L. "Taste and sight." Jezikoslovlje 20, no. 2 (December 11, 2019): 221–54. http://dx.doi.org/10.29162/jez.2019.8.

Full text

Abstract:

Embodiment is central to the Cognitive Linguistics enterprise. The grounding of language in body experience is one of the major tenets of linguistic description at various levels of analysis. We receive the infor-mation of the world around us through the bodily sensations; i.e. we per-ceive, then process and conceptualize it. Research into the sensory do-mains has continued to elicit further examination of how we use meta-phoric and metonymic cross-modal conceptualization in language. Inves-tigation has been carried out both on the single sense domains of touch, taste, smell, hearing, and sight, but also on cross-modality or synesthetic phenomena. Linguistic transfer between various senses seems to respect a hierarchy from the lower (touch, taste, smell) to the higher senses (hear-ing and sight), even though some variation of this hierarchy has been noted. The present study is the first part of a two-fold analysis of cross-modal linguistic mappings that exist between the senses of taste and sight. The objective is to verify what collocations occur between the two do-mains: do they respect the hierarchy, and how frequent, or how strong are they? Corpus analysis of the construction of the adjective + noun type are in keeping with existing literature: the sensory domain that func-tions as source is understood as an adjective modifying another sensory domain, which is found in the form of a noun. This research concentrates on cross-modal pairs found through a corpus-based analysis of taste ad-jectives in the description of vision nouns, e.g. delicious colors. Linguis-tic data were retrieved from corpora that allow for comparison of the ac-tual usage and definition of these constructions. These include the Cor-pus of Contemporary American English (COCA), and the Mapping Meta-phor with the Historical Thesaurus of English. The experimental method-ology is in keeping with the usage-based approach of Cognitive Linguis-tics, considering frequency and relevance.

APA, Harvard, Vancouver, ISO, and other styles

39

Guo, Jing, Xiaokang Gu, Zhengqi Liu, Minghao Ji, Jingwen Wang, Xiaoyan Yin, and Pengfei Xu. "CM-NET: Cross-Modal Learning Network for CSI-Based Indoor People Counting in Internet of Things." Electronics 11, no. 24 (December 9, 2022): 4113. http://dx.doi.org/10.3390/electronics11244113.

Full text

Abstract:

In recent years, multiple IoT solutions have used computational intelligence technologies to identify people and count them. WIFI Channel State Information (CSI) has recently been applied to counting people with multiple benefits, such as being cost-effective, easily accessible, free of privacy concerns, etc. However, most current CSI-based work is limited to human location-fixed environments since human location-random environments are more complicated. Aiming to fix the problem of counting people in human location-random environments, we propose a solution using deep learning CM-NET, an end-to-end cross-modal learning network. Since it is difficult to count people with CSI straightforwardly, CM-NET approaches this problem using deep learning, utilizing a multi-layer transformer model to automatically extract the correlations between channels and the number of people. Owing to the complexity of human location-random environments, the transformer model cannot extract characteristics describing the number of people. To enhance the feature learning capability of the transformer model, CM-NET takes the feature knowledge learned by the image-based people counting model to supervise the learning process. In particular, CM-NET works with CSI alone during the testing phase without any image information, and ultimately achieves sound results with an average accuracy of 86%. Meanwhile, the superiority of CM-NET has been verified by comparison with the latest available related methods.

APA, Harvard, Vancouver, ISO, and other styles

40

Hanks, Elizabeth. "A cross-linguistic comparison of the propositional content of laughter in American English and Central Thai." Intercultural Pragmatics 19, no. 2 (March 30, 2022): 233–55. http://dx.doi.org/10.1515/ip-2022-2004.

Full text

Abstract:

Abstract Research suggests that laughter can serve several communicative functions beyond indicating mirth, and as such, may hold propositional meaning. The present study analyzes cross-linguistic differences in the propositional content of laughter in American English and Central Thai television shows. A framework for classifying laughter by propositional content was first developed by drawing on existing literature and bottom-up analysis of the laughter found in American English and Thai shows. The framework includes categories of positive valency, negative valency, and humor, along with subcategories of disbelief, support, expressive, and pride. A multi-modal corpus of laughter was then created by compiling all laughter instances in the first 100 min of three American English television shows and three Thai television shows. The meanings of all 848 laughter instances in the corpus were categorized by propositional content of laughter. Results show that humor laughter and negative-support laughter are more frequent in American English, and positive-support laughter and negative-pride laughter are more frequent in Central Thai. These findings provide further evidence that laughter contains propositional content because they indicate that laughter use is subject to cross-linguistic variation that aligns with existing linguistic patterns and cultural values.

APA, Harvard, Vancouver, ISO, and other styles

41

Ren, Yong Sheng, and Qi Yi Dai. "Dynamic Analysis of the Rotating Composite Thin-Walled Cantilever Beams with Shear Deformation." Advanced Materials Research 690-693 (May 2013): 309–13. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.309.

Full text

Abstract:

This paper presents a theoretical study of the dynamic characteristics of rotating composite cantilever beams. Considering shear deformation and cross section warping, the equations of motion of the rotating cantilever beams are derived using Hamilton’s principle. The Galerkin’s method is used in order to analysis the free vibration behaviors of the model. Comparison of the theoretical solutions has been made with the results obtained from the finite element method, which prove the validity of the model presented in this paper. Natural frequencies are obtained for circular tubular composite beams. The effects of fiber orientation, rotating speed and structure parameters on modal frequencies are investigated.

APA, Harvard, Vancouver, ISO, and other styles

42

Lacey, Simon, Christine Campbell, and K. Sathian. "Vision and Touch: Multiple or Multisensory Representations of Objects?" Perception 36, no. 10 (October 2007): 1513–21. http://dx.doi.org/10.1068/p5850.

Full text

Abstract:

The relationship between visually and haptically derived representations of objects is an important question in multisensory processing and, increasingly, in mental representation. We review evidence for the format and properties of these representations, and address possible theoretical models. We explore the relevance of visual imagery processes and highlight areas for further research, including the neglected question of asymmetric performance in the visuo – haptic cross-modal memory paradigm. We conclude that the weight of evidence suggests the existence of a multisensory representation, spatial in format, and flexibly accessible by both bottom — up and top — down inputs, although efficient comparison between modality-specific representations cannot entirely be ruled out.

APA, Harvard, Vancouver, ISO, and other styles

43

Kato, Yoshinobu. "Development of Spatial Recognition in Preschool Children: On Piaget and Inhelder's Hypothesis of Topological Space." Perceptual and Motor Skills 63, no. 2 (October 1986): 443–50. http://dx.doi.org/10.2466/pms.1986.63.2.443.

Full text

Abstract:

The developmental sequence of recognition of shapes suggested by Piaget and Inhelder has been examined in cross-modal (touch-vision) and intramodal (vision-vision) conditions by using the method of similarity judgement. In the first condition, after factually exploring a standard shape, children from 4 to 6 yr. of age were asked to indicate which of two comparison shapes looked “most like” a standard shape possessing some features in common with either comparison. In the second condition, the procedure was the same as the first condition except that a standard shape was presented visually. Results showed that the number of topologically based responses decreased significantly with age in the touch-vision condition; however, there was no such tendency in the vision-vision condition. Also, the number of topologically based responses varied with the combination of shapes used.

APA, Harvard, Vancouver, ISO, and other styles

44

Oh, Yonghee, Nicole Kalpin, and Jessica Hunter. "The impact of temporally coherent visual and vibrotactile cues on speech perception in noise performance." Journal of the Acoustical Society of America 151, no. 4 (April 2022): A221. http://dx.doi.org/10.1121/10.0011118.

Full text

Abstract:

The inputs delivered to different sensory organs provide us with complementary information about the environment. Our recent study demonstrated that presenting abstract visual information of speech envelopes substantially improves speech perception ability in normal-hearing (NH), listeners [Yuan et al., J. Acoust. Soc. Am. (2020)]. The purpose of this study was to expand this audiovisual speech perception to the tactile domain. Twenty adults participated in sentence recognition threshold measurements in four different sensory modalities (AO: auditory-only; AV: auditory-visual; AT: audio-tactile; and AVT: audio-visual-tactile). The target sentence [CRM speech corpus, Bolia et al., J. Acoust. Soc. Am . (2000)] level was fixed at 60 dBA, and the masker (speech-shaped noise) levels were adaptively varied to find masked thresholds. The amplitudes of both visual and vibrotactile stimuli were temporally synchronized and non-synchronized with the target speech envelope for comparison. Results show that temporally coherent multi-modal stimulation (AV, AT, and AVT) significantly improves speech perception ability when compared to audio-only (AO) stimulation. These multisensory speech perception benefits were reduced when the cross-modal temporal coherence characteristics were eliminated. These findings suggest that multisensory interactions are fundamentally important for speech perception ability in NH listeners. The outcome of this multisensory speech processing highly depends on temporal coherence characteristics between multi-modal sensory inputs.

APA, Harvard, Vancouver, ISO, and other styles

45

Argiris, Georgette, Raffaella I. Rumiati, and Davide Crepaldi. "No fruits without color: Cross-modal priming and EEG reveal different roles for different features across semantic categories." PLOS ONE 16, no. 4 (April 14, 2021): e0234219. http://dx.doi.org/10.1371/journal.pone.0234219.

Full text

Abstract:

Category-specific impairments witnessed in patients with semantic deficits have broadly dissociated into natural and artificial kinds. However, how the category of food (more specifically, fruits and vegetables) fits into this distinction has been difficult to interpret, given a pattern of deficit that has inconsistently mapped onto either kind, despite its intuitive membership to the natural domain. The present study explores the effects of a manipulation of a visual sensory (i.e., color) or functional (i.e., orientation) feature on the consequential semantic processing of fruits and vegetables (and tools, by comparison), first at the behavioral and then at the neural level. The categorization of natural (i.e., fruits/vegetables) and artificial (i.e., utensils) entities was investigated via cross–modal priming. Reaction time analysis indicated a reduction in priming for color-modified natural entities and orientation-modified artificial entities. Standard event-related potentials (ERP) analysis was performed, in addition to linear classification. For natural entities, a N400 effect at central channel sites was observed for the color-modified condition compared relative to normal and orientation conditions, with this difference confirmed by classification analysis. Conversely, there was no significant difference between conditions for the artificial category in either analysis. These findings provide strong evidence that color is an integral property to the categorization of fruits/vegetables, thus substantiating the claim that feature-based processing guides as a function of semantic category.

APA, Harvard, Vancouver, ISO, and other styles

46

Xu, Qin. "Modal and Nonmodal Growths of Symmetric Perturbations in Unbounded Domain." Journal of the Atmospheric Sciences 67, no. 6 (June 1, 2010): 1996–2017. http://dx.doi.org/10.1175/2010jas3360.1.

Full text

Abstract:

Abstract Modal and nonmodal growths of nonhydrostatic symmetric perturbations in an unbounded domain are examined in comparison with their hydrostatic counterparts. It is shown that the modal growth rate is a function of a single internal parameter s, the slope of the cross-band wave pattern. The maximum nonmodal growth of total perturbation energy norm is produced, also as a function of s, by an optimal combination of one geostrophic neutral mode and two paired nongeostrophic growing and decaying (or propagating) modes in the unstable (or stable) region. The hydrostatic approximation inflates the maximum modal growth rate significantly (or boundlessly) as the basic-state Richardson number Ri is small (or → 0) and inflates the maximum nonmodal growth rate significantly (or boundlessly) as |s| is large (or → ∞). Inside the unstable region, the maximum nonmodal growth scaled by the modal growth is a bounded increasing function of growth time τ but reduces to 1 at (Ri, s) = (¼, −2) where the three modes become orthogonal to each other. Outside the unstable region, the maximum nonmodal growth is a periodic function of τ and the maximum growth time τm is bounded between ¼ and ½ of the period of the paired propagating modes. The scaled maximum nonmodal growth reaches the global maximum at s = −Ri−1 ± Ri−1(1 − Ri)1/2 (the marginal-stability boundary) for any τ if Ri ≤ 1, or at s = −1 ± (1 − Ri−1)1/2 for τ = τm if Ri > 1. When the neutral mode is filtered, the nonmodal growth becomes nongeostrophic and smaller than its counterpart growth constructed by the three modes but still significantly larger than the modal growth in general. The scaled maximum nongeostrophic nonmodal growth reaches the global maximum at s = −Ri−1 ± Ri−1(1 − Ri)1/2 for any τ if Ri ≤ 1, or at s = −Ri−1/2 for τ = τm if Ri > 1. Normalized inner products between the modes are introduced to measure their nonorthogonality and interpret their constructed nonmodal growths physically.

APA, Harvard, Vancouver, ISO, and other styles

47

Matsuda, Soichiro, and Junichi Yamamoto. "Emotion Comprehension in Intramodal and Cross-modal Matching: A Preliminary Comparison between Children With Autism Spectrum Disorders and Those With Williams Syndrome." Journal of Special Education Research 4, no. 1 (2015): 1–8. http://dx.doi.org/10.6033/specialeducation.4.1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Drygala, Izabela Joanna, Joanna Maria Dulinska, and Maria Anna Polak. "Seismic Assessment of Footbridges under Spatial Variation of Earthquake Ground Motion (SVEGM): Experimental Testing and Finite Element Analyses." Sensors 20, no. 4 (February 24, 2020): 1227. http://dx.doi.org/10.3390/s20041227.

Full text

Abstract:

In this paper, the seismic assessments of two footbridges, i.e., a single-span steel frame footbridge and a three-span cable-stayed structure, to the spatial variation of earthquake ground motion (SVEGM) are presented. A model of nonuniform kinematic excitation was used for the dynamic analyses of the footbridges. The influence of SVEGM on the dynamic performance of structures was assessed on both experimental and numerical ways. The comprehensive tests were planned and carried out on both structures. The investigation was divided into two parts: in situ experiment and numerical analyses. The first experimental part served for the validation of both the finite element (FE) modal models of structures and the theoretical model of nonuniform excitation as well as the appropriateness of the FE procedures used for dynamic analyses. First, the modal properties were validated. The differences between the numerical and the experimental natural frequencies, obtained using the operational modal analysis, were less than 10%. The comparison of the experimental and numerical mode shapes also proved a good agreement since the modal assurance criterion values were satisfactory for both structures. Secondly, nonuniform kinematic excitation was experimentally imposed using vibroseis tests. The apparent wave velocities, evaluated from the cross-correlation functions of the acceleration-time histories registered at two consecutive structures supports, equaled 203 and 214 m/s for both structures, respectively. Also, the coherence functions proved the similarity of the signals, especially for the frequency range 5 to 15 Hz. Then, artificial kinematic excitation was generated on the basis of the adopted model of nonuniform excitation. The obtained power spectral density functions of acceleration-time histories registered at all supports as well as the cross-spectral density functions between registered and artificial acceleration-time histories confirmed the strong similarity of the measured and artificial signals. Finally, the experimental and numerical assessments of the footbridges performance under the known dynamic excitation generated by the vibroseis were carried out. The FE models and procedures were positively validated by linking full-scale tests and numerical calculations. In the numerical part of the research, seismic analyses of the footbridges were conducted. The dynamic responses of structures to a representative seismic shock were calculated. Both the uniform and nonuniform models of excitation were applied to demonstrate and quantify the influence of SVEGM on the seismic assessment of footbridges. It occurred that SVEGM may generate non-conservative results in comparison with classic uniform seismic excitation. For the stiff steel frame footbridge the maximum dynamic response was obtained for the model of nonuniform excitation with the lowest wave velocity. Especially zones located closely to stiff frame nodes were significantly more disturbed. For the flexible cable-stayed footbridge, in case of nonuniform excitation, the dynamic response was enhanced only at the points located in the extreme spans and in the midspan closely to the pillars.

APA, Harvard, Vancouver, ISO, and other styles

49

Gabarró-López, Sílvia, and Laurence Meurant. "Contrasting signed and spoken languages." Languages in Contrast 22, no. 2 (August 23, 2022): 169–94. http://dx.doi.org/10.1075/lic.00024.gab.

Full text

Abstract:

Abstract For years, the study of spoken languages, on the basis of written and then also oral productions, was the only way to investigate the human language capacity. As an introduction to this first volume of Languages in Contrast devoted to the comparison of spoken and signed languages, we propose to look at the reasons for the late emergence of the consideration of signed languages and multimodality in language studies. Next, the main stages of the history of sign language research are summarized. We highlight the benefits of studying cross-modal and multimodal data, as opposed to the isolated investigation of signed or spoken languages, and point out the remaining methodological obstacles to this approach. This contextualization prefaces the presentation of the outline of the volume.

APA, Harvard, Vancouver, ISO, and other styles

50

SILVESTRE, N., D. CAMOTIM, and N. F. SILVA. "GENERALIZED BEAM THEORY REVISITED: FROM THE KINEMATICAL ASSUMPTIONS TO THE DEFORMATION MODE DETERMINATION." International Journal of Structural Stability and Dynamics 11, no. 05 (October 2011): 969–97. http://dx.doi.org/10.1142/s0219455411004427.

Full text

Abstract:

This work is part of an ongoing investigation aimed at comparing the mechanics underlying the application of generalized beam theory (GBT) and the constrained finite strip method (cFSM), two alternative modal approaches to analyze the elastic buckling behavior of open-sectional unbranched thin-walled members. Previous work included an overall comparison between the numerical results yielded by the two approaches for lipped channel columns and beams, which were shown to be essentially identical — the few minor discrepancies were fully explained. The next step consists of revisiting the kinematical assumptions and procedures adopted by GBT to identify and characterize the cross-sectional deformations modes, presenting, explaining, and interpreting them from a novel perspective, deemed more suitable for a true comparison with the displacement field constraints employed in cFSM — the main objective of this paper. The starting point is the derivation of the conventional finite strip method (FSM), intended to show that some of the corresponding matrices also appear in GBT. Indeed, it is demonstrated that the determination of the GBT deformation modes involves a set of particular FSM matrices, termed "cross-sectional matrices." After a brief comparison between the GBT and cFSM assumptions and procedures, an illustrative example is presented and discussed, in order to provide a better grasp of the concepts and procedures involved in the new approach to the GBT deformation mode determination. Finally, the paper closes with a few concluding remarks that also address the work to be carried out in the near future.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Cross-modal comparison'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles