scholarly journals Acoustic correlates of the advanced vs. retracted tongue root feature in Igbo

2021 ◽  
Vol 2 (4) ◽  
pp. 45-79
Author(s):  
Margarita Ivanova
Keyword(s):  
Center Of Gravity ◽  
Vowel Harmony ◽  
Instrumental Analysis ◽  
Spectral Parameters ◽  
Acoustic Correlates

Vowel harmony based on the advanced tongue root (±ATR) feature is a well-known attribute of the languages of the Macro-Sudan belt. Igbo (< Benue-Congo), one of these languages, on basis of which first instrumental studies of ±ATR articulation were conducted, has an asymmetric vowel system /i, ɪ, e, a, ɔ, o, ʊ, u/, so that root ±ATR harmony exists within three pairs and a single vowel /e/. This paper describes an acoustic realization of ±ATR in Igbo. According to the hypothesis that the value of the first formant in combination with the distribution of energy over the spectrum combine into a single perceptual cue that allows to distinguish vowels opposed by ±ATR we investigate (along with the description of the formant space) three spectral parameters that were shown to be acoustic correlates of ±ATR in other Macro-Sudan languages. The results of the instrumental analysis indicate that acoustic correlates of ±ATR harmony in Igbo are the value of the first formant, its bandwidth and normalized center of gravity. In addition, all parameters relevant for the ±ATR contrast in our data divided /ɔ/ utterances in different roots into two groups with contrasting values of the feature.

Uvular approximation as an articulatory vowel feature

2016 ◽  
Vol 46 (1) ◽  
pp. 1-31 ◽  
Author(s):  
Jonathan P. Evans ◽  
Jackson T.-S. Sun ◽  
Chenhao Chiu ◽  
Michelle Liou
Keyword(s):  
Ultrasound Imaging ◽  
Acoustic Signal ◽  
Sichuan Province ◽  
Vowel Harmony ◽  
Imaging Data ◽  
International Phonetic Alphabet ◽  
Place Of Articulation ◽  
Acoustic Correlates ◽  
Vowel Systems ◽  
The Difference

This study explores the phenomenon of uvularization in the vowel systems of two Heishui County varieties of Qiang, a Sino-Tibetan language of Sichuan Province, China. Ultrasound imaging (one speaker) shows that uvularized vowels have two tongue gestures: a rearward gesture, followed by movement toward the place of articulation of the corresponding plain vowel. Time-aligned acoustic and articulatory data show how movement toward the uvula correlates with changes in the acoustic signal. Acoustic correlates of uvularization (taken from two speakers) are seen most consistently in raising of vowel F1, lowering of F2 and in raising of the difference F3-F2. Imaging data and the formant structure of [l] show that uvular approximation can begin during the initial consonant that precedes a uvularized vowel. Uvularization is reflected phonologically in the phonotactic properties of vowels, while vowel harmony aids in the identification of plain–uvularized vowel pairs. The data reported in this paper argue in favor of a revision of the catalog of secondary articulations recognized by the International Phonetic Alphabet, in order to include uvularization, which can be marked with the symbol [ʶ] in the case of approximation and [χ] for secondary uvular frication.

Investigating lenition patterns in south-central Peninsular Spanish /spstsk/ clusters

2016 ◽  
Vol 46 (3) ◽  
pp. 287-310 ◽  
Author(s):  
Nicholas Henriksen ◽  
Sarah K. Harper
Keyword(s):  
Center Of Gravity ◽  
Instrumental Analysis ◽  
South Central ◽  
Peninsular Spanish ◽  
Stress Influences ◽  
Shed Light

In this study we report on an instrumental analysis of /spstsk/ clusters in south-central Peninsular Spanish, documenting a three-way system of /s/ realization: speakers tend to produce alveolar fricatives in /st/ clusters, velar fricatives in /sk/ clusters, and glottal fricatives or deletions in /sp/ clusters. An analysis based on the discrete classification of /s/ variants shows that a combination of linguistic factors (following consonant and stress) influences /s/ realization. An analysis based on the phonetic coding of /s/ variants (using measures of fricative duration, relative voicing, and center of gravity) reveals the extent to which velar fricatives display an intermediate status along the phonetic continuum of /s/ lenition variations. Taken together, these analyses shed light on the nature of coda /s/ in Spanish and on the extent to which the attested allophony constitutes a lenition process.

Classification of Acceleration Waveforms during Walking by Wavelet Transform

1997 ◽  
Vol 36 (04/05) ◽  
pp. 356-359 ◽  
Author(s):  
M. Sekine ◽  
M. Ogawa ◽  
T. Togawa ◽  
Y. Fukui ◽  
T. Tamura
Keyword(s):  
Wavelet Transform ◽  
Wavelet Analysis ◽  
Center Of Gravity ◽  
Dynamic Responses ◽  
Sequential Data ◽  
Acceleration Signal ◽  
Continuous Dynamic

Abstract:In this study we have attempted to classify the acceleration signal, while walking both at horizontal level, and upstairs and downstairs, using wavelet analysis. The acceleration signal close to the body’s center of gravity was measured while the subjects walked in a corridor and up and down a stairway. The data for four steps were analyzed and the Daubecies 3 wavelet transform was applied to the sequential data. The variables to be discriminated were the waveforms related to levels -4 and -5. The sum of the square values at each step was compared at levels -4 and -5. Downstairs walking could be discriminated from other types of walking, showing the largest value for level -5. Walking at horizontal level was compared with upstairs walking for level -4. It was possible to discriminate the continuous dynamic responses to walking by the wavelet transform.

Effect of amiodarone on heart rate variability in patients with newly diagnosed atrial fibrillation (clinical observation)

2020 ◽  
pp. 81-85
Author(s):  
E. P. Popova ◽  
O. T. Bogova ◽  
S. N. Puzin ◽  
D. A. Sychyov ◽  
V. P. Fisenko
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Drug Therapy ◽  
Heart Function ◽  
Newly Diagnosed ◽  
Class Iii ◽  
Spectral Parameters ◽  
Patient Will ◽  
The Individual

Spectral analysis of heart rate variability gives an idea of the role of the autonomic nervous system in the regulation of chronotropic heart function. This method can be used to evaluate the effectiveness of drug therapy. Drug therapy should be carried out taking into account the individual clinical form of atrial fibrillation. Information about the vegetative status of the patient will undoubtedly increase the effectiveness of treatment. In this study, spectral parameters were studied in patients with newly diagnosed atrial fibrillation. The effect of antiarrhythmic drug class III amiodarone on the spectral parameters of heart rate variability was studied.

ESTIMATION OF SPECTRAL PARAMETERS OF SCATTERED SIGNALS IN RADARS OF VERTICAL SOUNDING OF THE ATMOSPHERE

2018 ◽  
Vol 77 (3) ◽  
pp. 187-198
Author(s):  
V. N. Oleynikov ◽  
S. V. Doroshenko ◽  
V. D. Pshenichny
Keyword(s):  
Spectral Parameters

UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Iskendar Iskendar ◽  
Andi Jamaludin ◽  
Paulus Indiyono
Keyword(s):  
Comparative Study ◽  
Model Test ◽  
Hydrodynamic Model ◽  
Surface Effect ◽  
Center Of Gravity ◽  
Test Results ◽  
Flat Bottom ◽  
Towing Tank ◽  
Test Models ◽  
Wetted Surface Area

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft  was fitted with  stephull  form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model  as a comparative study. The hydrodynamic  tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft  of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves.  Test results show that models  with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

Optimalisasi sistem pergudangan pada industri air minum dalam kemasan (studi kasus pergudangan pt. ima montaz sejahtera).

2010 ◽  
Vol 8 (2) ◽  
pp. 803
Author(s):  
Ramli Usman ◽  
Achmad As'ad Sonief ◽  
Bambang Indrayadi
Keyword(s):  
Center Of Gravity ◽  
Centre Of Gravity

PT. Ima Montaz Sejahtera merupakan suatu Perusahaan Industri Air Minum Dalam Kemasan (AMDK) dengan merk “Mount Agua” dan perusahaan ini menghasilkan produk berupa produk gallon 19 liter, produk botol 1500 ml, produk botol 600 ml, dan produk gelas 240 ml. Pabrik PT. Ima Montaz Sejahtera memiliki dua buah gudang yaitu gudang material dan gudang produk jadi, didalam pengoperasian proses produksi banyak waktu yang terbuang untuk mengangkut material dari gudang ke mesin produksi dan ini disebabkan letak gudang material jauh dari mesin produksi dan juga dalam mengangkut material dari gudang ke mesin produksi harus melalui gudang produk jadi sehingga mengganggu aktifitas proses produksi. Metode yang digunakan pada penelitian ini menggunakan metode center of gravity yaitu menentukan titik pusat letak gudang baru berdasarkan tata letak mesin-mesin produksi.Dengan meningkatnya waktu produksi maka dengan sendirinya kapasitas produksi juga meningkat untuk produk gallon 19 liter sebesar 36 gallon per minggu (0,490 %), produk botol 1500 ml sebesar 211 karton per minggu (2,475 %), produk botol 600 ml sebesar 71 karton per minggu (1,172 %), dan produk gelas 240 ml sebesar 186 karton per minggu(0,731 %).Kata Kunci: Optimalisasi, Tata Letak Gudang, Centre of Gravity, Lay Out.

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