• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.779-780
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• 2012

• The Hankook-Saengyark Bo
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• no.247
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• pp.6-6
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• 2001

유자 부산물로 천연염색법 개발(고흥군 농기센터, 재배농 소득향상 기대) - '장뇌삼음료' 개발 판매 안동농업기술센타 - 석씨향방, 한약재 베개 개발 - '동아' 이용, 기능성 식빵 만들어(전북도 농업기술원)

• 한국생활과학회:학술대회논문집
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• 2008.05a
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• pp.159-160
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• 2008

• Journal of the Ergonomics Society of Korea
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• v.25 no.1
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• pp.17-25
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• 2006

• Science of Emotion and Sensibility
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• v.14 no.3
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• pp.459-466
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• 2011

Sleep diseases such as snoring and sleep apnea are physically, mentally harmful and results serious health problems. Snoring, known as breathing noise, is caused by coupled oscillation of the airway when the air passes through the trachea, and sleep apnea is caused by upper airway blockage. In order to solve these problems, many attempts have been made to detect the snoring during sleep and alleviate it. In this study, a new sensing system and analysis algorithm were developed in order to detect snoring sounds correctly under various sleep environments. Two polyvinylidene fluoride (PVDF) vibration sensors were used inside the pillow. The first PVDF sensor detects vibration transmitted through skull caused by snoring. And the second PVDF sensor detects both snoring sounds and ambient noises. The signals of two sensors were acquired through the designed analog circuits, and analyzed for snoring detection. Ten volunteers were participated for the experiment under five different conditions. Data from two PVDF sensors were processed by the established analysis algorithm, and snoring sounds were compared to noises. The results indicated that the energy of snoring is 70% bigger than that of ambient noise, which proves effectiveness of sensing system and analysis algorithm. Further study would be continued for more wide clinical studies with various environment noises. Based on this study, development of anti-snore pillow and sleep monitoring system for comfort sleep could be developed.

• Journal of the Ergonomics Society of Korea
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• v.8 no.1
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• pp.3-17
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• 1989

To find te appropriate height of pillows for the Koreans, it has been investigated by means of the sensuous test. The sensuous test has been scrutinized by electromyogram survey and X-ray observation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1645-1646
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• 2013

• The Hankook-Saengyark Bo
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• no.242
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• pp.5-5
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• 2000

약초 방향제품 잇따라 개발(제천농기센터, 비누$\cdot$베개등 선봬) - 두충 과립차 개발 - 경남농업기술원 어성초 재배방법 구명(중금속 해독작용, 건강식품으로 각광) - 율무씨앗 소독 싹 발생률 23$\%$ 향상 모잘록병도 크게 줄어 - 황기 일관작업기 개발(이랑만들기, 제초제 살포 동시에)

• Korean Journal of Acupuncture
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• v.39 no.2
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• pp.68-69
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• 2022

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.4
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• pp.865-874
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• 2018

This paper is about a smart pillow, and a smart diaper. The smart pillow analyzes the frequency of a baby's cry and applies its digital value to the band pass filter. If the crying is between 300-600Hz, the white noise comes out. The smart diaper alerts to the smart phone if the humidity outside the diaper is over 99%, or the temperature is over $29^{\circ}C$ after the defecation of the baby. The smart diaper also prevents choking of the baby by alert to smart phone if they are in a dangerous position by sensing the location of the infant.