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전국 일부 학교 건축물 내의 실내 공기 및 인식도 조사
손종렬(Jong-Ryeul Sohn),윤승욱(Seung-Uk Yoon),김종혁(Jong-Hyuk Kim),이용식(Yong-Sik Lee),최한영(Han-Young Choi),김영성(Young-Sung Kim),손부순(Bu-Soon Son),양원호(Won-Ho Yang),김민회(Min-Hoi Kim) 대한환경위생공학회 2005 대한환경위생공학회지 Vol.20 No.3
Recently, indoor air quality (IAQ) in workplace, residential environments and schools has been concerned of people, scientists and related the public, and has recognized the healthy effectsrelated to IAQ, specially in schools in Korea. Therefore, objectives of this study in this study were to measure and compare the perception of IAQ of selected air pollutants in Seoul from April to September 2004. Measurement place measured 2 schools of Seoul and local 9 schools (by Kyonggi Province, Chungchong-bukdo Chungchong-namdo, Chollado-bukdo, Cholla-namdo, Kyongsang-bukdo, Kyongsang-namdo, Kwangju, schoolin Pusan each 1 place). Temperature, humidity, illumination, carbon monoxide, carbon dioxide, TBC (total bacteria count), noise, PM10, TVOC(total volatile organic compounds), HCHO (formaldehyde) were measured simultaneously. Also, we performed a questionnaire survey of 250 students and 50 teachers about their awareness for the importance of IAQ in their schools. Among this article, we handled noise, carbon monoxide, carbon dioxide, TBC, TVOC, HCHO, PM 10 in our conclusion. Major results were as follows ; Carbon monoxide (CO) was lower than indoor air standard of Korea. Carbon dioxide (CO₂) appeared that 4 schools among our sample target school exceeded in normal standard. 4 schools were almost similar with normal standard. TBC appeared that 7 schools among 11 schools were higher than standard. Noise measured school's mean value passed exceeded standard. And school which passed over standard appeared to 7 schools among 11 schools. HCHO was exceeded 4 schools by standard that excess and certainly interrelation between school's establishment year and facilities of construction was detected. PM10 was exposed all schools by fitness in standard. TVOC appeared that 9 schools among 11 measurement school was exceeded health effect standard of Japan.
손성빈(Sung Bin Son),최훈(Hoon Choi),한성식(Sung Shik Han),강영숙(Young Suk Kang),박영준(Young Jun Park),이제훈(Je Hoon Lee),김복린(Bok Lin Kim),조용균(Yong Kyoon Jo),박교훈(Kyo Hoon Park),이철민(Chul Min Lee),이홍균(Hong Kyoon Lee) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.2
Fetal intussusception is not common and the underlying mechanism triggering the event is not known at present. There are few reports of successful diagnosis in fetus with prenatal ultrasongraphy. It may be detected by meconium peritonitis. Meconium peritonitis is a nonbacterial foreign body reaction or chemical inflammation by intestinal perforation result from intestianl atresia, intussusception and fetal bowel obstruction. Recently we experienced a 33+1 weeks of gestational fetus with fetal intussusception who had prenatal ultrasonographic detection with meconium peritonitis, and the infant was underwent postnatal laparotomy. We present this case with a brief review of literature.
손장원 ( Son Jang-won ),윤춘경 ( Yoon Chun Gyeong ),김형철 ( Kim Hyung Chul ),신아현 ( Shin Ah-hyun ),엄한용 ( Um Han Yong ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
This study was used the Mesocosm which presumes the movement of the nutrient substance (especially PO<sub>4</sub>-P) of the wetland it was executed. After set up the Mesocosm inside the wetland and adding the PO<sub>4</sub>-P, Observationed the movement of the PO<sub>4</sub>-P follows at hour. It analyzed the factor which is the possibility of causing an effect in PO<sub>4</sub>-P consistency of the wetland - Flora, Zooplankton, Phytoplankton, Absorbing rate of Algae, Settling rate, Release rate. Before adding The Consistency of the PO<sub>4</sub>-P inside reed texture was average 3.44 mg/gDW, after adding it wad 2.91 mg/gDW with 36% reduced. The Algae is more sensitive than the plant in absorption of the nutrient. The Phytoplankton increased suddenly after PO<sub>4</sub>-P adding. After adding the PO<sub>4</sub>-P, almost there was not change of the Algae.
E급 증폭기의 바이어스 조정을 통한 LF-대역 무선 전력 전송시스템의 수신 전력 안정화
손용호(Yong-Ho Son),한상규(Sang-Kyoo Han),장병준(Byung-Jun Jang) 한국전자파학회 2013 한국전자파학회논문지 Vol.24 No.9
스마트폰 무선 충전 시나리오에서는 송신 패드에 비해 수신 패드의 크기가 작으므로 수신 패드의 위치에 상관없이 일정한 전력을 부하에 공급하는 것이 중요하다. 본 논문에서는 송신 패드와 수신 패드의 크기가 각각 16 ㎝×18 ㎝와 6 ㎝×8 ㎝의 직사각형 구조를 갖는 경우, 무선 전력 전송 송신부에 위치한 E급 증폭기의 Drain 바이어스 전압만을 조정하여 수신 패드의 위치에 상관없이 일정한 전력이 부하에 공급되는 방식을 제안하였다. 설계된 LF-대역 무선 전력 시스템의 구성은 PWM IC인 TL494로 제어되는 Buck converter 구조의 전원 회로, 저가의 IRF510 power MOSFET을 이용한 E급 증폭기, 송신 패드 및 수신 패드, 그리고 Schottky 다이오드를 이용한 풀 브릿지 정류기로 구성된다. 제작된 무선 전력 전송 시스템은 바이어스 조정을 하지 않는 경우 240 ㎑에서 최대 4 W 출력과 67 % 이상의 시스템 효율을 가지며, 바이어스 조정을 하는 경우에는 수신 패드의 위치에 상관없이 수신 전력을 2 W로 일정하게 유지할 수 있다. In wireless smart phone charging scenario, the transmitter pad is larger than the size of the receiver pad. Thus, it is important to supply a constant power to the receiver regardless of its location. In this paper, we propose a new method to regulate the receiver"s power by adjusting a drain bias of class E power amplifier. The proposed LF-band wireless power transfer system is as follows: a buck converter power supply which is controlled by a pulse width modulation(PWM) IC TL494, a class E amplifier using a low cost IRF510 power MOSFET, a transmitter coil whose dimension is 16 ㎝×18 ㎝, a receiver coil whose dimension is 6 ㎝×8 ㎝, and a full bridge rectifier using Schottky diodes. A measured performance show a maximum output power of 4 W and system efficiency of 67 % if we fix the bias voltage. If we adjust the bias voltage, the received power can be maintained at a constant power of 2 W regardless of receiver pad location.
An approach based on the generalized ILOWHM operators to group decision making
Jin Han Park(박진한),Yong Beom Park(박용범),Bu Young Lee(이부영),Mi Jung Son(손미정) 한국지능시스템학회 2010 한국지능시스템학회논문지 Vol.20 No.3
In this paper, we define generalized induced linguistic aggregation operator called generalized induced linguistic ordered weighted harmonic mean (GILOWHM) operator. Each object processed by this operator consists of three components, where the first component represents the importance degree or character of the second component, and the second component is used to induce an ordering, through the first component, over the third components which are linguistic variables and then aggregated. It is shown that the induced linguistic ordered weighted harmonic mean (ILOWHM) operator and linguistic ordered weighted harmonic mean (LOWHM) operator are the special cases of the GILOWHM operator. Based on the GILOWHM and LWHM operators, we develop an approach to group decision making with linguistic preference relations. Finally, a numerical example is used to illustrate the applicability of the proposed approach.
김선우,손철봉,송용식,장길수,이태강,국찬,김재수,한명호,Kim, Sun-Woo,Son, Chul-Bong,Song, Yong-Sik,Jang, Gil-Soo,Lee, Tae-Kang,Kook, Chan,Kim, Jae-Soo,Han, Myung-Ho 한국음향학회 1990 韓國音響學會誌 Vol.9 No.4
국내 설정에 적합한 차음성능기준 및 등급화 방안을 설정하기 위하여 그 기초 연구단계로서 주민반응조사 및 차음성능수준을 측정하고, 차음성능 평가치와 생활감과의 상관관계를 분석 외국의 기존 평가기준곡선 적응가능성을 검토하였다. 분석결과 ISO에 의한 평가방법보다는 JIS에 의한 평가방법이 국내 공동주택의 경우에는 보다 합리적임을 파악하였고, 표준충격원은 경량 및 중량충격원을 사용하는 것이 타당하다고 판단된다. 또한 측정시 문제가 되는 63Hz 중심 주파수대역을 측정범위에서 제외하여도 차음성능 지수상의 오차는 무시할 수 있었다. This study aims to establish the appropriate class and standards of sound insulation performance, which are suitable for domestic conditions. For, these purpose, field surveys were conducted, correlationship between subjective response and impact sound insulation performance and then, the applicability of ISO and JIS evaluation method was reviewed. As a result, the JISs method is more advisable than the ISO to evaluate Impact sound insulation performance of domestic apartment house and it is desirable to use both light and heavy weight source (tapping machine, tire) as standard impact sources. And, whether including 63Hz bandwidth or not, the difference was recognized very small in calculating impact sound insulation index of JIS A 1419.
최근 10년간 국내 소 질병 원인체에 관한 문헌적 고찰
이한규 ( Han Gyu Lee ),조아라 ( Ara Cho ),오상익 ( Sang-ik Oh ),노재희 ( Jae-hee Roh ),정영훈 ( Yong Hoon Jung ),최창용 ( Changyong Choe ),도윤정 ( Yoon Jung Do ),엄재구 ( Jae Ku Oem ),손동수 ( Dong-soo Son ),류재규 ( Jae Gyu Yoo 한국동물위생학회 2020 한국동물위생학회지 (KOJVS) Vol.43 No.3
For estimating the prevalence of bovine infectious disease agents, the pathogens were classified as follows: the digestive disease agents, respiratory disease agents, reproductive disease agents, and tick-borne disease agents. This study covered 81 published papers regarding bovine infectious diseases in Korea that determined the presence of diverse pathogens or the antibodies elicited by the infectious agents in cattle from 2010 to 2019. In total, 59,504 cows were involved in the papers reporting the causative agents in their cases. The disease prevalence for the digestive, respiratory, reproductive, and tick-borne cases was 9.0%, 13.4%, 10.4%, and 7.8%, respectively. Bovine viral diarrhea virus, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, and Eimeria spp were more significantly prevalent in the cows under one-year age than over one-year age. Bovine viral diarrhea virus, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, and Anaplasma spp. were more significantly prevalent in Hanwoo than dairy cattle. Coxiella burnetii, Neospora caninum, and Theilieria spp. were more significantly prevalent in dairy cattle than Hanwoo. Tick-borne disease agents were more prevalent in cows grazing than the case in housing. Our analytic data obtained from this study emphasize the need for more studies on the occurrence of these pathogens according to the breed, age, and the region, to come up with bovine infectious disease control measures in Korea.