• Proceedings of the KSLP Conference
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• 1996.11a
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• pp.96-96
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• 1996

구개인두부전증(velopharyngeal insufficiency, VPI)에 의한 발음이상을 평가하는 방법에는 여러 가지 방법이 개발되어 왔으나 비강측정기(nasometry)에 의한 비성수치(naslance score)의 측정과 spectrography에 의한 음향분석이 최근 널리 사용되고 있다. 본 연구에서는 실험적으로 유발한 VPI군의 음향학적 결과와 비강측정기의 결과를 정상군과 비교함으로써 VPI환자의 보다 정확하고 객관적인 평가의 방법과 지표를 얻고자 하였다. (중략)

• Proceedings of the KSLP Conference
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• 1993.12a
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• pp.11-11
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• 1993

현존하는 문헌에 의하면, 입술근육의 수축과 운동시간의 측면에서 영어의 자음을 경음-연음분류를 할 수 있는 음성학적 실증이 없는 것으로 나타나고 있다. 본 연구는 근육운동 측정기를 사용하여 영어와 한국어의 양순 정지음의 발화시 근육(orbicularis oris superior muscle)운동을 측정하였다. 영어의 강세음절에서는 기존의 주장과 같이 /p/와 /b/의 발화시 근육운동에 차이가 없거나 일관성이 없는 것으로 나타났으나, 무강세음절에는 기존 이론과 달리 근육운동수축에 있어서 /p/가 /b/에 비하여 통계학적으로 훨씬 큰 것으로 나타났다.(중략)

• 한국신재생에너지학회:학술대회논문집
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• 2011.05a
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• pp.113.2-113.2
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• 2011

Sn-Ag계 합금은 대표적인 무연 솔더 조성으로 전자제품의 실장 및 접합에 적용되어 왔으며, 태양전지 분야에서도 모듈의 전극과 bus바로 사용되는 등 다양한 분야에서 사용되고 있다. 그러나 최근 Ag 가격의 급격한 상승과 솔더 접합부의 신뢰성을 보다 향상시키고자 Ag의 함량을 줄이고 다원계 합금 조성의 무연 솔더 연구가 활발히 진행되고 있다. 본 실험에서는 기존의 연구 결과를 바탕으로 Sn-1.0Ag-0.5Cu-0.4In 4원계 무연솔더 조성에 Bi를 첨가하여 최적의 융점과 용융구간을 가지는 5원계 Sn-Ag-Cu-In-Bi 계 솔더 합금을 설계하였다. 이 설계된 합금은 기존의 유연 솔더인 Sn-Pb와 대표적인 무연 솔더인 Sn-3.5Ag와 각각의 특성을 비교 분석하였다. 젖음성을 평가하기 위하여 wetting balance tester를 이용하여 실험을 행하였고 Differential Scanning Calorimetry(DSC)를 분석하여 젖음 정도와 조성 분석 및 고상점과 액상점 등의 녹음 거동을 확인하였다. 또한 각각의 조성별 전단응력에 따른 파괴 거동을 분석하였다.

• Journal of Dental Rehabilitation and Applied Science
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• v.24 no.1
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• pp.19-27
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• 2008

The purpose of this study was to obtain normative nasalance scores for adult subjects speaking the Korean language and to determine whether significantly different scores exist for female and male speakers. Mean nasalance scores were obtained for normal speaking Korean adults while they are reading vowels, consonants, no nasal sentence, mild nasal sentence, and high nasal sentence. Thirty adults who had lived in Seoul area with normal articulation, resonance, and voice were included. Among the subjects 15 were male aged 24-38 years and 15 were female aged 19-33. Nasometer data were collected and analyzed using the Kay Nasometer 6400. Nasalance scores were evaluated to investigate the effect of gender by using statistical tests. Nasalance data showed that nasalance values varied accroding to speech stimuli, and there was no significant difference in nasalance scores between male and female speakers in most of the language samples.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.11 no.2
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• pp.141-145
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• 2000

Background and Objectives : The nasalance score measured by Nasometer is a supplementary data for the perceptually rated nasality by a trained speech pathologist. The nasalance score varies with subjects. The objective of the present study was to examine whether there are differences in nasalance scores as a function of age and sex. Materials and Method : This study used 20 normal chidren aged from 3 to 8 and 40 normal adults aged from 21 to 37(male : female= 1 : 1) as subjects. The nasalance scores were analyzed in 3 different phonetic contests(nasal, /i/ vowel,/a/ vowel) and 4 different sentence lengths(1, 2, 4, 8 syllable). Results : The children had significantly higher nasalance scores in short sentences an the adults. The female subjects had significantly higher nasalance scores in nasal sentences and in short sentences than the male subjects. Conclusion : These results may indicate that sex and age differences should be considered in the interpretation of the nasalance score in nasal sentences or in short sentences.

• 한국IT서비스학회:학술대회논문집
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• 2009.11a
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• pp.473-476
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• 2009

통신 서비스는 음성, 문자, 영상 등으로 발전해 왔고, 이모티콘, 플레시콘 등 점점 더 다양한 통신 서비스로 발전 되고 있다. 본 논문에서는 기존의 통신서비스에서 제공하는 문자, 음성, 영상 데이터에 인간의 감성 데이터를 부가한 새로운 통신 서비스를 제안한다. 제안된 새로운 통신 서비스를 구현하기 위하여, 인간 감성을 나타내는 생체 신호를 측정하여야 하며 여기서는 그 측정기를 구성하는데 있어 가능한 방법에 대한 연구이다. 인간의 감성을 나타내는 생체신호로는 맥박, 혈압, 긴장도 등등이 될 수 있는데, 본 논문에서는 생체신호 중 하나인 맥박신호를 적용하였고 인터넷상에서 서로 통신이 가능하도록 바이오 멀티미디어 통신 서비스를 구성 하였다.

• Journal of the Korean Chemical Society
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• v.57 no.4
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• pp.432-438
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• 2013

We report a contact angle goniometer that can be easily assembled and used in high school and general chemistry experiments. It consists of an LED flash, a sample stand, and a camera fixed on an optical bread board, and the sample area is covered to block light from outside with a box with holes on both sides. ImageJ, free image analyzing software and a JAVA plugin (Drop_analysis) were used to determine the contact angle of liquid drop resting on solid surface. The contact angles of various liquids were successfully measured on various surfaces. The solid surface energies have also been determined using the Owen-Wendt method from the contact angles of $H_2O$ and $CH_2I_2$. The results reasonably agree with the previously reported values, showing the surface characteristics and modification as well as the dispersive and polar contributions. These contact angle goniometer and method for determination of the contact angle and surface energy can be applied to observation of various surface properties including wettability, hydrophilicity, and water repelling. Students can learn how the surface properties are related to the intermolecular interactions and gain experience about the equilibrium between the related forces, optics, and mathematical derivations.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.4
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• pp.740-749
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• 1994

This paper presents method for improving the performance of the VSELP speech coder. The hybrid method is employed for pitch period searching. Pitch searching time is reduced and pitch detection error, caused by quantization error of excitation signal of encoder in VSELP coder, is reduced by this method. This paper also adopts a pitch period enhancement filter and an adaptive first order filter. In this result, pitch period searching time is reduced to 26%, and MOS of reconstructed speech signal is increased by 3.19 to 4.04.

• Speech Sciences
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• v.4 no.2
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• pp.69-89
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• 1998

The aim of this study is to develop an objectively method of speech evaluation for children with cleft palates. To assess velopharyngeal function, Visi-Pitch, Computerized Speech Lab. (CSL), Nasometer and Palatometer were used for this study. Acoustic parameters were measured depending on the diagnostic instruments: Pitch (Hz), sound pressure level (dB), jitter (%) and diadochokinetic rate by Visi-Pitch, VOT and vowels formant ($F_1\;&\;F_2$) by a Spectrography and the degree of hypernasality by Nasometer. In addition, Palatometer was used to find the lingual-palatal patterns of cleft palate. Ten children with cleft palates and fifty normal children participated in the experiment. The results are as follows: (1) Higher nasalance of children with cleft palates showed the resonance disorder. (2) The cleft palate showed palatal misarticulation and lateral misarticulation on the palatogram. (3) Children with cleft palates showed the phonatory and respiratory problems. The duration of sustained vowels in children with cleft palates was shorter than in the control groups. The pitch of children with cleft palates was higher than in the control groups. However, intensity, jitter and diadochokinetic rate of children with cleft palates were lower than in the control group. (4) On the Spectrogram, the VOT of children with cleft palates was longer than control group. $F_1\;&\;F_2$ were lower than in the control group.

• The Journal of the Korea Contents Association
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• v.13 no.4
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• pp.320-330
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• 2013

The purpose of this study is to increase efficiency of CPR through comparing the chest-compression quality between rescuer's simplified verbal order method and the continued verbal order method by utilizing voice meter during CPR. Subjects were 89 people(45 people for the experimental group, 44 people for the control group) who completed the 15-week CPR curriculum as undergraduates for the department of Emergency Medical Technology in C Province and were carried out by being randomly extracted. The group division was set for the experimental group as the group with the simplified verbal order and for the control group as the group with the continued verbal order. The period of measurement was progressed primarily(November 10, November 28, 2011) and secondarily(September 3-September 4, 2012). An analysis was used SPSS WIN 12.0 program. As a result of research, as for the implementation of appropriate chest compression(time, %), the quality was higher(p<.05) in the experimental group(102.86 times, 67.79%) than the control group(85.31 times, 55.84%). As a result of research, the chest compression(time, %) in the experimental group(102.86 times, 67.79%) had the higher effect of chest compression quality(p<.05) than the control group(85.31 times, 55.84%). On the other hand, the operation of weak chest compression(time) was higher in control group(61.13 times) than experimental group(35.54 times). The proper chest compression was shown(p<.05) in men of the experimental group as for gender and in over 60kg of the experimental group as for weight.