Since the metamaterial perfect absorber (MPA) is composed of electromagnetic resonance structures, the main operational mechanism of the MPA is electromagnetic resonance. In this work, we use Finite ...Integration Technique (FIT)–based simulation to study a metamaterial absorber based on multi-layer resonance structures then the result is verified by experiment. We find that increasing the number of layers gives rise to an increase in the absorption energy and induces a large number of the absorption peak up to 9, thus forming a broad and multiband metamaterial in the frequency range from 5 to 8.9 GHz. In addition, the tunability of structural parameters in the four-layer structure allows optimizing the absorption peaks with an intensity of over 90%, which is in good agreement with the experimental result. These findings could play an important role in the design of radar shield or military devices.
Ce travail vise à étudier la difficulté des apprenants thaïlandais dans la prononciation de la consonne /v/ du français en position initiale de syllabe et cherche à expliquer les raisons pour ...lesquelles cette consonne est souvent confondue avec /w/ par ces apprenants. Suite à l’étude des processus de romanisation du thaï et de translittération des emprunts en caractères thaïs, nous relevons qu’il existe une association entre la graphie < v > et le son w dans la langue depuis plusieurs siècles. Une étude expérimentale est alors menée dans le but de vérifier l’hypothèse d’un effet de l’orthographe sur la prononciation de /v/ à travers les deux tâches (lecture oralisée et imitation). Les résultats confirment une réelle difficulté des apprenants thaïlandais dans la prononciation de /v/ et montrent que la présence de l’orthographe augmente considérablement le taux de confusion entre /v/ et /w/, quels que soient le type de stimuli, le contexte vocalique et la position de /v/ dans le mot observé (initiale ou médiane). L'apprenant réussit à imiter approximativement /v/ dans quelques cas mais le taux de non-réussite reste très élevé.
Why do Thai learners often confuse /v/ and /w/ in French? A pilot experimental study on the effect of orthography.
This work investigates Thai learners’ difficulty in pronouncing French consonant /v/ in syllable-initial position and seeks to explain the reasons why this consonant is very often confused with w by Thai learners. Our study on the processes of Thai romanization and the transliteration of loanwords into Thai characters shows that there has been an association between the < v > grapheme and the w sound in the Thai language for several centuries. We therefore conducted an experimental study to verify hypotheses based on a possible effect of orthography on the /v/ pronunciation through the two tasks (oral reading and imitation). The results confirm a real challenge for Thai learners in the pronunciation of /v/ and show that the presence of the orthography considerably increases the confusion rate between /v/ and /w/, whatever the type of stimuli, the vowel context and the position of /v/ in the word (initial or medial). The participant manages to approximatively imitate /v/ in few cases, but the rate of non-success remains very high.
This work investigates Thai learners’ difficulty in pronouncing French consonant /v/ in syllable-initial position and seeks to explain the reasons why this consonant is very often confused with w by ...Thai learners. Our study on the processes of Thai romanization and the transliteration of loanwords into Thai characters shows that there has been an association between the < v > grapheme and the w sound in the Thai language for several centuries. We therefore conducted an experimental study to verify hypotheses based on a possible effect of orthography on the /v/ pronunciation through the two tasks (oral reading and imitation). The results confirm a real challenge for Thai learners in the pronunciation of /v/ and show that the presence of the orthography considerably increases the confusion rate between /v/ and /w/, whatever the type of stimuli, the vowel context and the position of /v/ in the word (initial or medial). The participant manages to approximatively imitate /v/ in few cases, but the rate of non-success remains very high.
Ce travail vise à étudier la difficulté des apprenants thaïlandais dans la prononciation de la consonne /v/ du français en position initiale de syllabe et cherche à expliquer les raisons pour lesquelles cette consonne est souvent confondue avec /w/ par ces apprenants. Suite à l'étude des processus de romanisation du thaï et de translittération des emprunts en caractères thaïs, nous relevons qu'il existe une association entre la graphie < v > et le son w dans la langue depuis plusieurs siècles. Une étude expérimentale est alors menée dans le but de vérifier l'hypothèse d'un effet de l'orthographe sur la prononciation de /v/ à travers les deux tâches (lecture oralisée et imitation). Les résultats confirment une réelle difficulté des apprenants thaïlandais dans la prononciation de /v/ et montrent que la présence de l'orthographe augmente considérablement le taux de confusion entre /v/ et /w/, quels que soient le type de stimuli, le contexte vocalique et la position de /v/ dans le mot observé (initiale ou médiane). L'apprenant réussit à imiter approximativement /v/ dans quelques cas mais le taux de non-réussite reste très élevé.
Cette étude, s’inscrivant dans le contexte de l’enseignement et de l’apprentissage du français, explore l’une des difficultés récurrentes rencontrées par les apprenants thaïlandais lors du traitement ...de la consonne non native /v/ : la confusion fréquente avec /w/ en position initiale de syllabe. Nous avons réalisé une étude pilote expérimentale impliquant huit apprenants thaïlandais de niveaux A1-A2 afin d’évaluer l’impact des informations audiovisuelles sur le traitement des consonnes /f v w/. Deux types de tâches (perception et production) portant sur ces trois consonnes dans deux structures syllabiques (CV, VCV) et quatre contextes vocaliques non arrondis (/i e ɛ a/) ontété menés dans deux modalités distinctes (auditive (A) et audiovisuelle (AV)). En perception, une tâche de discrimination demandait aux participants de juger la similitude entre les stimuli de test et les stimuli de référence. En production, ils répétaient les stimuli perçus précédemment, soit entendus seuls (modalité A), soit entendus et vus (modalité AV). Quatre participants ont été testés en modalité A et quatre en modalité AV. Les résultats mettent en évidence une nette amélioration du taux de réussite dans la perception et la production de /v/ en modalité AV par rapport à la seule modalité A, quel que soit le type de tâche. De plus, la confusion entre /v/ et /w/ en perception et production est moins fréquente lorsque les apprenants bénéficient à la fois d’informations visuelles et sonores. Par ailleurs, le temps de réponse lors de la perception des consonnes est significativement réduit en modalité AV comparativement à la modalité A. Dans l’ensemble, ces résultats démontrent que les informations audiovisuelles facilitent et accélèrent le traitement de la consonne non native /v/ en position initiale de syllabe chez les apprenants thaïlandais.
A variety of studies have shown differences between phonetic features of consonants according to their prosodic and/or syllable (onset vs. coda) positions. However, differences are not always found, ...and interactions between the various factors involved are complex and not well understood. Our study compares acoustical characteristics of coda consonants in Vietnamese taking into account their position within words. Traditionally described as monosyllabic, Vietnamese is partially polysyllabic at the lexical level. In this language, tautosyllabic consonant sequences are prohibited, and adjacent consonants are only found at syllable boundaries either within polysyllabic words (CVC.CVC) or across monosyllabic words (CVC#CVC). This study is designed to examine whether or not syllable boundary types (interword vs. intraword) have an effect on the acoustic realization of codas. The results show significant acoustic differences in consonant realizations according to syllable boundary type, suggesting different coarticulation patterns between nuclei and codas. In addition, as Vietnamese voiceless stops are generally unreleased in coda position, with no burst to carry consonantal information, our results show that a vowel's second half contains acoustic cues which are available to aid in the discrimination of place of articulation of the vowel's following consonant.
This dataset explores the perception of happiness and job satisfaction among Vietnamese general school teachers and administrators (principals and vice-principles) in implementing a new curriculum. ...This study uses SPSS Statistics 26.0 and Exel to analyze data on the opinions of 782 general school teachers and administrators (principles and vice-principles) about satisfaction and happiness at work and influencing factors such as gender, age, experience, income, and workplace, workplaces, difficulties, sources of support when implementing new programs. This dataset contributes to a better understanding of the factors influencing educators' well-being and job satisfaction in the context of curriculum change, providing insights into educational policy and practice in Vietnam and beyond.
The Coronavirus disease pandemic of 2019 is a vast worldwide public health hazard, impacting people of all ages and socioeconomic statuses. Vaccination is one of the most effective methods of ...controlling a pandemic like COVID-19. This study aims to investigate the relationship between the number of vaccination injections and fear of COVID-19 and test whether beliefs benefit from vaccination COVID-19 mediate the effect of fear of COVID-19 on the number of vaccination injections. A total of 649 Vietnamese adults were enrolled online to finish answering, including scales The Health Belief Model (HBM) and The Fear of COVID-19 (FCV-19S), consisting of 340 (52.4%) males and 309 (47.6%) females. The data were analyzed using variance, regression, and a simple mediation model. The total score of COVID-19 fear was
M
= 22.26,
SD
= 5.49. Vietnamese fear of COVID-19 was at a medium level. Our results suggest that 18- to 20-year-olds are more fearful of COVID-19 than others. People who received the first dosage exhibited a greater fear of COVID-19 than those who received the second dose and were not inoculated. Additionally, the beliefs benefit of vaccination COVID-19 has a role in the relationship between the number of vaccination injections and fear of COVID-19. During the pandemic, adults in Vietnam are more afraid of COVID-19 than during prior outbreaks. Besides, the Vietnamese populace demonstrated a considerable demand for and high acceptability of the COVID-19 vaccine. The current study indicates that psychological counselors and therapists should counsel clients on the value of vaccination and address the fear of COVID-19 as public understanding of the benefits of vaccines increases. To further clarify the effect of this issue on the correlation between fear of COVID-19 and the number of vaccinations, the results of this study indicate that the existing vaccine communication factor for COVID-19 vaccination should be modified to increase confidence in the benefits of immunization.
Human sexual behavior research is a multidisciplinary endeavor that seeks to comprehend one of the most vital and complex aspects of our behavioral science. This study aimed to investigate Vietnamese ...university students' perception of sexual knowledge as well as the relationship between gender, academic year, and sexual orientation. The questionnaire was sent to 666 Vietnamese undergraduate students in four universities which 418 respondents were considered valid for research purposes. The study results showed that there was a significant difference among the four study groups of different (1) academic year; (2) sexual orientations; (3) gender and academic year level; (4) academic year and sexual orientation; (5) gender, academic year, and sexual orientation level when considered jointly on the variables of the three aspects of the Sex knowledge and Attitude Questionnaire II. However, there was no reciprocal relationship between (6) gender; (7) gender, and sexual orientation level. The findings of this study will have implications for school policies that attempt to promote and maintain a positive school climate in an effort to address the issue of sexuality education, including sexual knowledge.
Glossogobius sparsipapillus is a potential candidate for aquaculture in the Mekong Delta, but information on its food and feeding habit is still fragmented and deficient. This study, therefore, aims ...to contribute diet and feeding ecology to this fish based on 661 specimens (331 males and 330 females) caught in estuarine areas from December 2019 to November 2020. Data analysis showed that fish diet composition comprised five categories such as Acetes spp., small fish, Polychaeta, Uca spp., and others (e.g., fish scales and detritus). This goby is a generalist feeder, feeding preliminarily on Acetes spp. but rarely on Polychaeta. Feeding intensity is high and does not change with sexes but varies according to fish sizes, seasons, and sites. Moreover, a similar meal size was observed in different sexes, fish sizes, seasons, and sites. The findings supply the fundamental knowledge on the food and feeding of this species, being used for artificially cultivating study.
Why do syllable onsets attract consonant(s)? Vallée, Nathalie; Tran, Thi Thuy Hien; Mairano, Paolo ...
Studi italiani di linguistica teorica ed applicata,
2015, Letnik:
27, Številka:
1
Journal Article
Recenzirano
The present study is carried out in the context of a project whose primary aim is to define the physical components that could help explainwhat makes a syllable. We examine whether phonetic factors ...can account for observed universal trends in syllable structure, particularly those thatprovide an explanation for the Maximum Onset Principle (MOP). MOP forms the basis of syllabification theories allocating consonantal segments tosyllable-initial position rather than to syllable-final position. Two theoretical frameworks can provide a phonetic basis for MOP, namely the Frame/Content Theory and Articulatory Phonology, but they do not account for it thoroughly. Consequently, we propose to reconsider the MOP in the light of new articulatory data focusing on basic jaw movements, and assume that MOP results from asymmetric jaw oscillation cycles. Kinematic data were obtained using a Carsten 2D Electromagnetic Articulograph (AG-200 EMA). Jaw oscillations were investigated for duration, velocity, amplitude of the opening vs closing phases, and then statistically analyzed according to different syllable structures. The results on French and Vietnamese bring out differences between the opening and closing phases, showing clear duration and velocity asymmetries. These results are, however, not consistent with previous works on American-English which can provide a phonetic explanation for MOP, based on the properties of the jaw cycles.
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