• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.425-426
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• 2023

지난 5년 (2016~2020년) 간 고속도로 교통사고 사망자 1,035명 중 약 70%(722명)가 졸음 및 주시 태만으로 인해 발생하였다. 졸음운전 사고를 예방하기 위해 졸음 쉼터나 휴게소 등이 있지만 활용률이 높은 편은 아니다. 해당 문제 해결을 위해 본 논문에서는 자동차 내부에서 즉각적으로 졸음을 판별해 알람을 제공하는 알람 기능을 구현하였다. 차량에 웹캠과 CO₂ 농도 측정기를 설치하여 웹캠으로는 운전자의 눈 종횡비를 계산하여 졸음을 판단하고 CO₂ 센서로 차량 내부 CO₂ 농도를 측정하여 운전자의 졸음을 판단하여 경고음과 음성 경고 메시지를 출력함과 동시에 창문 개폐 기능으로 잠을 깨워주기 때문에 교통사고 발생률 저하에 기여할 것으로 기대된다.

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.5
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• pp.190-194
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• 2002

The aim of development is system having convenient, cheap, reliable and better good measurements. The cozy environments in auto and architects is essentiable requirements. This study focuses on system developments of test equipment for better performance of noise protection in automobiles. Sound cards using makes easily to acquire the sound in each room, especially reduced the complexities of the circuits. The developed system have easily been measured and have characteristics of rapid mecanical response. The menu of rough scan method makes efficiently to test the shielding performance of auto rubber in whole frequency scales.

• Speech Sciences
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• v.7 no.3
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• pp.219-228
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• 2000

Assessment of speech nasality provides important information for the treatment of velopharyngeal incompetence. Objective procedures may be used to assess velopharyngea1 function, in examples Nasometer, Aerodynamics, x-ray, Electromyography, Nasoendoscopy and Videofluoroscopy etc. The aim of this study was to obtain comprehensive nasalance data for Korean adults, aged 20 years and to investigate any gender differences within that age group using Nasometer II. The results were as follow: (1) The nasalance of the vowels(/a/, /i/, /e/, /o/, /u/, /ja/, /je/, /wi/) in the group of adults was higher in females than in males (p<0.05). (2) The nasalance of the plosives (/p/, /$p^h$/, /p'/, /t/, /$t^h$/, /t'/, /k/, /$k^h$/, /k'/) in the group of adults was higher in females than in males (p<0.05). (3) The nasalance of the affricatives (/c/, /$c^h$/, /c'/) in the group of adults was higher in females than in males (p<0.05). (4) The nasalance of the fricatives (/s/, /s'/, /$\int$/) in the group of adults was higher in female than in males (p<0.05). (5) There was no statistically significant effect for the nasalance of nasal consonants (/m/, /n/, /$a{\eta}$/).

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.03a
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• pp.100-100
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• 2011

아라미드 섬유는 고강도, 고내열성 등의 성능이 매우 우수하여 생산량이 제일 많은 수퍼 섬유이면서도 강직한 분자구조와 고결정성의 치밀한 구조 때문에 염색이나 기능성 가공이 어려워 의류 인테리어용, 타 산업으로의 다양한 전개가 어려운 실정이다. 최근에 사용이 급증되고 있는 아라미드 섬유를 상업적으로 염색 및 가공을 할 수 있는 공정 프로세스를 개발하여 표면 개질, 견뢰도의 향상 및 기능성 가공, 아라미드 및 관련 타 소재와의 교직을 통하여 기존제품의 성능개선 등의 기술 확보를 통해 선진국 및 대만 중국 등의 경쟁국 위주로 전개되고 있는 아라미드 염색가공기술을 조기에 확보하여 선진기술에 대응하여 우리나라의 섬유산업 인프라를 활용한 다양한 용도전개를 위해서 본 기술이 시급히 전개되어야 한다. 이에 본 연구에서는 환경친화적 건식처리 공정인 플라즈마 처리를 통해 아라미드 섬유의 표면개질 효과를 알아보았다. 플라즈마 처리에 의한 아라미드 섬유의 모폴로지 변화는 주사전자현미경(FE-SEM)으로 확인하였으며, 표면 개질 효과는 적외선분광기(FT-IR)과 접촉각 측정기로 평가하였다. 플라즈마 처리 가스나 출력이 증가함에 따라 아라미드 섬유 표면의 경시변화를 확인하였으며, 젖음성이 향상되는 것을 확인하였다.

• Proceedings of the KWS Conference
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• 2007.11a
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• pp.215-217
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• 2007

철계 피삭재 가공 시 적용되는 cBN(cubic Boron-Nitride)의 경우 열적/구조적 안정성으로 인해 융착 시 계면에서 화학적 결합이 어려워, 지립이 단일층으로 형성되어야 하는 융착 공구의 경우 적용되질 못하고 있다. 이러한 문제를 해결하기 위해 세라믹과의 젖음성이 우수한 Ti 성분이 포함된 67Ag+28Cu+5Ti(wt.%) 조성의 합금분말을 이용하여 cBN을 접합을 하였으며, 이때 융착조건은 진공 분위기($6{\times}10^{-6}$Torr), $900^{\circ}C$ 온도에서 5분간 유지하여 융착을 실시하였다. 본 연구의 주목적은 Ti 합금화 된 Ag계 합금분말 및 cBN의 융착 계면에서의 융착 계면거동해석을 통한 건전한 접합공정을 찾는데 있다. 이에 온도 $900^{\circ}C$, 유지시간 5분에서 건전한 융착층을 형성함을 알 수 있었다. 또한 결합력 측정기를 이용하여 결합력을 측정한 결과 diamond와 융착하였을 때가 123N, cBN을 융착하였을 때 107N으로써, cBN 융착이 diamond 융착의 87%정도의 결합력을 보임을 알 수 있었다. 한편 cBN과 Ag-Cu-Ti계 브레이징 필러의 계면에서의 미세조직 및 화학반응의 메커니즘은 SEM, EDS를 이용하여 분석하였다.

• Journal of the Korea Society of Computer and Information
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• v.25 no.8
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• pp.47-54
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• 2020

Developmental disorders are impairments of brain and/or central nervous system and refer to a disorder of brain function that affects languages, communication skills, perception, sociality and so on. In diagnosis of developmental disorders, behavioral response such as expressing emotions in proper situation is one of observable indicators that tells whether or not individual has the disorders. However, diagnosis by observation can allow subjective evaluation that leads erroneous conclusion. This research presents the technological environment and data acquisition system for AI based screening of autism disorder. The environment was built considering activities for two screening protocols, namely Autism Diagnostic Observation Schedule (ADOS) and Behavior Development Screening for Toddler (BeDevel). The activities between therapist and baby during the screening are fully recorded. The proposed software in this research was designed to support recording, monitoring and data tagging for learning AI algorithms.

• Composites Research
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• v.25 no.3
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• pp.70-75
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• 2012

Interfacial durability and electrical properties of CNT, ITO or xGnP coated PVDF nanocomposites were investigated for acoustic actuator applications. The xGnP coated PVDF nanocomposite exhibited better electrical conductivity than CNT and ITO case due to the unique electrical property of xGnP, and this nanocomposite also showed good sound characteristics. Interfacial adhesion durability between either neat CNT or plasma treated CNT and plasma treated PVDF were measured by static contact angle, surface energy, work of adhesion, and spreading coefficient tests. The optimum acoustic actuation performance of xGnP coated PVDF nanocomposite was measured using sound level meter with changing radius of curvature and coating conditions. As compared to CNT and ITO, the xGnP was known as more appropriate acoustic actuator due to the characteristic electrical property. It is the most appropriate condition when the radius of curvature is 15 degree. Although sound characteristics were different with various coating thicknesses, it is possible to manufacture transparent actuator with good sound quality.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.879-881
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• 2010

For the rapid development of society, such as small family, one-people family is following. The traditional family is being changed, so the older stay home alone. That makes it more and more. Staying home alone, the older's health and safety are worth considering by us. With the rapid development of RFIDRadio Frequency Identification) technology, its applications have extended to all areas of our lifes. RFIDRadio Frequency Identification) has became a major topic of concern in multi-industry. With the high-speed economic growth and the development of science, medicine, the old people's life expectancy is increasing slightly. So it is necessary to design a protective system for the older's safety. In this thesis, self-care system is made by using RFID(Radio Frequency Identification) technology to authenticate an user and using TTS(test to speech) to convert character information to voice information and also using infrared radiation technology to protect home effectively, and using e-blood pressure monitors to examination the older's bodies.

• Journal of Internet Computing and Services
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• v.11 no.1
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• pp.77-84
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• 2010

Children, who have a language disorder, have difficulty in expressing their reaction about stimulus of sound and vision. So it is very hard to grasp that they recognize external stimulus or not. For solving these problem, we can check response time and make them to choose stimulus by giving stimulus of sound and vision to them through Audio and Visual Stimulus and Reaction Meter System. Additionally, We can help them by improving response time by repeated study based on the results and making them to recognize and choose stimulus faster without aversion about external stimulus. It would make them not to feel uncomfortable and isolated because they are unfamiliar with external stimulus.

• Journal of Preventive Medicine and Public Health
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• v.5 no.1
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• pp.115-123
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• 1972

As a link of chain study program of school health, a survey was made up by the screening test with audiometry for hearing disturbance on 18,675 high school students who are mainly aged in 15-19 years from November 5.1969 to October 30. 1970. The results obtained were summerized as follows. According to our criteria as table 3, the rates of the profound, the severe and the moderate who required the appropriate hearing aids were 0.02%, 0.03% and 0.14% respectively:-the cumulative percentage was 0.197. When the marginal, 0.23% should be included the cumulative rate was 0.41%. But there was no-significance by sex and school classes. If we will make the special classes for them one class would be estimated out of 10,000 persons when a class is formed with about 15 persons. Otherwise when we examined that according to each ear of persons, the rates of the profound, the severe and the moderate were 0.17%, 0.22% and 0.33% respectively and their cumulative percentage wag 0.72. There was no significance also by sex and age. By the way, the rate of hearing disturbance in urban high school students tended to lower than rural. And the perceptive disturbance was higher than rural in rate. The conductive disturbance tended to oppose in comparison with the above.