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Liquid‐Crystalline Blue Phase Laser with Widely Tunable Wavelength (Adv. Mater. 21/2013)
Hur, Sung‐,Taek,Lee, Bo Ram,Gim, Min‐,Jun,Park, Kyung‐,Won,Song, Myoung Hoon,Choi, Suk‐,Won WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.21
<P>A liquid‐crystalline blue‐phase laser with a tunable photonic bandgap (PBG) of over 150 nm and a wide temperature range is demonstrated by Myoung Hoon Song and Suk‐Won Choi on p. 3002. A lasing peak shift of more than 100 nm is realized due to the large PBG shift of the liquid‐crystalline blue phase. The shift in the lasing wavelength was reversible during repeated temperature changes over the entire stability range of the liquid‐crystalline cubic blue phase. </P>
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국내 다기관에서 조사한 지역사회획득 메티실린내성 황색포도알균의 빈도와 임상적 특성
송진수,최평균,송경호,조재현,김성한,방지환,이창섭,박경화,박경운,신수,최희정,김의석,김동민,이미숙,박완범,김남중,오명돈,김의종,김홍빈,최강원 대한감염학회 2006 감염과 화학요법 Vol.38 No.6
목적 : 최근 전세계적으로 지역사회획득 메티실린내성 황색포도알균(community-associated methicillin-resistant Staphylococcus aureus, CA-MRSA)의 보고가 증가하고 있다. 하지만, 우리나라에서는 CA-MRSA 감염증에 대한 증례보고만 있을 뿐 아직까지 체계적인 연구결과가 없는 실정이다. 저자들은 국내에서 CA-MRSA의 빈도, 감염증의 임상적 양상, 분리된 균주의 항균제내성 양상을 조사하였다. 재료 및 방법 : 2005년 1월부터 2005년 6월까지 7개 병원에서 MRSA가 분리된 환자의 명단을 파악한 후 의무기록지와 건강보험심사평가원의 자료를 검토하였다. 외래나 응급실에서 혹은 입원 후 72시간 이내에 균주가 분리되고 MRSA 획득과 관련된 위험인자가 없는 경우 CA-MRSA로 정의하였으며, 분리된 균주의 임상적 의미에 따라 원인병원체(pathogen), 집락화(colonizer), 미결정(undetermined)으로 분류하였다. Penicillin과 oxacillin을 제외하고 3개 이상의 다른 계열 항균제에 내성이면 다제내성으로 정의하였다. 결과 : 연구기간동안 총 3,251주의 황색포도알균이 분리되었으며, 이 중 MRSA는 1,900주(58.4%)였다. MRSA 가운데 CA-MRSA는 114주(6.0%) 였으며, 이들이 분리된 부위는 귀(62주), 비뇨기계(14주), 피부 및 연부조직(11주), 호흡기계(10주), 혈액(3주) 등이었다. CA-MRSA 균주 가운데 집락균은 22주, 원인병원체는 22주였으며, 나머지 균주에 대해서는 그 임상적 의미를 결정할 수 없었다. 항균제 감수성 검사를 시행한 73균주 중 47주(64.4%)는 다제내성이었다. CA-MRSA 감염증 22예 중 피부 및 연부조직 감염(9예)과 중이염/외이도염(9예)이 가장 흔하였다. 침습적 감염증(invasive infection)은 4명(원발성 균혈증 3예, 감염성 관절염 1예)에서 확인되었지만, CA-MRSA 감염증으로 사망한 환자는 없었다. 결론 : 병원내 감염증에서는 MRSA가 심각한 문제이지만, 아직까지 지역사회 감염증에서 CA-MRSA는 흔하지 않았다. Background : Methicillin-resistant Staphylococcus aureus (MRSA) infection has emerged in patients who do not have the established risk factors. In Korea, little is known about the epidemiology and clinical features of community-associated MRSA (CA-MRSA). Material and Methods : Clinical microbiology laboratory databases of 7 hospitals were reviewed to identify the patients from whom MRSA was isolated during the period of January to July 2005. Only one isolate per patient was enrolled. In order to identify the risk factors of MRSA acquisition, the medical records and the Health Insurance Review Agency databases were reviewed. CA-MRSA was defined as MRSA isolated from patient without established risk factors. We analyzed patient demographics, underlying medical conditions, characteristics of infection, and antimicrobial susceptibility profiles. Results : Of total 3,251 S. aureus isolates, 1900 (58.4%) were MRSAs. Of the MRSA isolates, 114 (6.0%) were CA-MRSA. Of 114 CA-MRSA isolates, 22 (19.3%) were colonizers, 22 (19.3%) were pathogens, and the clinical significance of remaining 70 (61.4%) could not be determined. Median age of the 22 patients with CA-MRSA disease was 47 years. Nine patients had skin and soft tissue infections, 9 ear infections, 3 bacteremia, 1 septic arthritis. Seven patients had underlying medical disease. None died of the CA-MRSA infections. Of the 73 isolates of CA-MRSA, 47 (64.4%) were resistant to more than 3 classes of antibiotics besides β-lactams. Conclusion : Although MRSA is highly prevalent among hospital-associated S. aureus infection, CA-MRSA infections are not common.
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송미순,류세앙,김명숙 성인간호학회 2002 성인간호학회지 Vol.14 No.1
Purpose: This study was performed to identify the prevalence and type of urinary incontinence (UI) after a stroke, to find the differences in urinary symptoms according to continence or incontinence, and to find the degree of impact of UI on daily life. Method: For data collection, we had a structured interview with a questionnaire. The subjects were 239 post stroke patients. Results: Among the subjects(mean age: 65±10), 66.1 percent had an infarction, and 25.5 percent had a hemorrhage. And 26.4 percent of subjects were within 2 weeks and 28.9 percent from 1 year to 5 years since their episodes of a stroke. Forty five point six percent of subjects had various types of UI: urge 25.7 percent, stress 14.7 percent, functional 20.2 percent, and mixed 39.4 percent. There were significant differences in frequency, nocturia, decreased stream, and incomplete emptying between the incontinent and continent groups. Subjects reported UI influenced various aspect of daily life, 54.1 percent as cause of distress, 53.2 percent on overall quality of life, and 40.4 percent on sleep. The Mixed UI, including urge UI, had higher impact on daily life than others. Conclusion: There was a high prevalence of UI, mixed, urge, and functional type as most prevalent, and it had a strong impact on daily life of post stroke patients.
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박종연,조계현,송명석 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.A
The metal halide lamps are now widely used in the application and commercial lighting due to their attracting properties such as good color rendering and high efficiency. But, they have the serious problem of acoustic resonance for high frequency operation and they need the high voltage to ignite. So, they have not been applied to indoors. Over the past few years, a considerable number of studies have been conducted on the electronic ballast together with hot restarting and resonance phenomenon. But, very few attempts have been made with the adaptive ignition method according to the lamp state. In this paper, electronic ballast is proposed for metal halide lamps with an igniter for adaptive ignition. The proposed electronic ballast can generate different ignition voltages according to the arc tube state.
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자발성 세균성 복막염을 일으킨 그람음성간균의 3세대 세팔로스포린 내성률 변화
방지환,송경호,박주경,박완범,김성한,김홍빈,김남중,오명돈,김의종,이효석,최강원 대한감염학회 2007 감염과 화학요법 Vol.39 No.3
The third generation cephalosporin is widely used in treatment of spontaneous bacterial peritonitis (SBP). Resistance to the third generation cephalosporin was associated with poor outcome in patients with SBP. Thus it is necessary to know the changes in resistance rate. We planned to investigate retrospectively on resistance rate of the third generation cephalosporin of gram negative bacteria isolated in patients with SBP, who visited Seoul National University Hospital between 1998 and 2006. The Clinical and Laboratory Standards Institute guidelines were applied for antibiotic susceptibility test. A total of 269 consecutive episodes of clinically and microbiologically proven SBP was identified during the study period and 209 cases were caused by gram negative organisms. Among 209 isolates, 22 (10.5%) showed resistance to the third generation cephalosporin. The prevalence of resistance was decreasing during the study period (P=0.014).
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송명숙(Song Myoung-Suk),이숙향(Lee Suk-Hyang) 한국통합교육학회 2019 통합교육연구 Vol.14 No.2
본 연구에서는 2002년부터 2019년까지 국내학술지에 발표된 협력교수 관련 연구 중 통합교육 상황에서 실시된 협력교수 중재 연구 총 12편을 선정하여 전반적인 연구 동향 및 중재특성, 현장적용을 위한 방안을 살펴보았다. 문헌분석 결과 첫째, 통합교육 실행을 위한 협력교수 중재 연구는 주로 집단설계를 사용하고 있었으며 유·초등학교에 편중되어 있는 것으로 나타났다. 또한 다양한 연구참여자 중에서 중재효과를 측정한 대상은 대부분 장애학생이었으며, 교사를 대상으로 중재효과를 측정한 연구는 매우 낮았다. 둘째, 독립변인 중재유형은 교과목과 연계하여 협력교수를 실시한 경우가 가장 많았고, 종속변인은 학업 성취도, 참여도, 인식과 태도 등으로 매우 다양했다. 셋째, 협력교수의 현장적용 방안을 위한 실행요인 분석결과 대부분 교사간 협의와 협력교수 프로그램 계획, 역할과 책임공유 및 특별한 전략이나 기술사용, 학생성취 및 프로그램 운영 평가를 실시하는 것으로 나타났으며 수업특성에 따라 다양한 협력교수 유형이 사용되고 있었다. 이러한 결과를 토대로 협력교수의 현장적용 및 후속연구 방향이 다음과 같은 측면에서 논의되었다:1) 협력교수 적용대상의 확대, 2) 학교급 특성에 따른 효율적인 협력교수 연계, 3) 협력교수 실행요인 및 유형별적용, 4) 행·재정적 지원체계 확보. The purpose of this study was to investigate research trends and intervention features regarding co-teaching implemented in inclusive education settings. For this purpose, a total of 12 articles published in Korean journals from 2002 to 2019 were reviewed and analyzed. The results of analysis were as follows:First, most studies used group comparison design and implemented in preschools or elementary schools. Aslo, intervention effects were measured mostly for students with disabilities and studies examined the intervention effects for teachers were very few. Second, regarding independent variables, the most common intervention type was co-teaching linked to subject areas. Various dependent variables were measured such as academic achievement, participation, cognition and attitude. Third, as core implementation factors for inclusive education, teachers’meetings for co-teaching, co-teaching program plan, role and responsibility sharing, and special strategies or skills, student achievement, and program management were addressed in most studies. Various co-teaching types were used considering different lesson plans or activities. Based on the results, implications for practical application in the field and directions for future research were provided as follows:1) extending the participants who co-teaching targeted for, 2) implementing effective co-teaching considering school features across difference school levels, 3) applying implementation factors and types of co-teaching, and 4) enhancing administrative and financial supporting systems.
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가상 건설환경에서의 딥러닝 기반 폐색영역 검출을 위한 데이터 베이스 구축
김경수(K. S. Kim),이재인(J. I. Lee),곽석우(S. W. Gwak),강원률(W.R. Kang),신대영(D.Y. Shin),황성호(S. H. Hwang) 유공압건설기계학회 2021 유공압건설기계학회 학술대회논문집 Vol.2021 No.11
In this paper, a method for constructing and verifying datasets used in deep learning technology is proposed to prevent safety accidents in the construction environment. The virtual construction simulator was developed to implement various construction environments, and custom data in the virtual environment was set to diversify the location and parameters of the sensors. A database for real-time deep learning models was built and detected at the pixel level to detect uneven roads and objects in the construction site. When deep learning-based detection is performed, it may interfere with the accurate judgment due to occlusion areas hidden by other objects. Therefore, the database for developing the occlusion area detection algorithm in virtual environments was constructed and verified.
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Song, Myoung-Youp,Shon, Mi-suk The Korean Ceramic Society 2002 한국세라믹학회지 Vol.39 No.6
LiMn$_2$O$_4$ compounds were synthesized by calcining a mixture of LiOH and MnO$_2$(CMD) at 47$0^{\circ}C$ for 10 h and then calcining again at $650^{\circ}C$ to 90$0^{\circ}C$ fur 48 h in air with intermediate grinding. All the synthesized samples exhibited XRD patterns for the cubic spinel phase with a space group Fd3m. The lattice parameter increased gradually as the sintering temperature rose. The electrochemical cells were charged and discharged fur 20 cycles at a current density 300$\mu$A/$\textrm{cm}^2$ between 3.5 V and 4.3 V. The voltage vs. discharge capacity curves for all the samples showed two plateaus. The LiMn$_2$O$_4$ sample calcined at 90$0^{\circ}C$ had the largest first discharge capacity. This sample exhibited the best crystallinity, had relatively large lattice parameter and had relatively large particles with rectatively homogeneous size. All the samples showed good cycling performances. Among all the samples, the LiMn$_2$O$_4$ calcined at 85$0^{\circ}C$ had relatively large first discharge capacity and very good cycling performance. The addition of excess LiOH and the mixing in ethanol considered to help the formation of the more LiMn$_2$O$_4$ phase per unit weight sample and the more stable LiMn$_2$O$_4$phase. These led to the larger discharge capacities and the better cycling performances. The cyclic voltammograms fur the second cycle of the LiMn$_2$O$_4$ samples showed the oxidation and reduction peaks around 4.05 V and 4.18 V and around 4.08 V and 3.94 V, respectively. The larger first discharge capacity of the sample calcined at the higher temperature is related to the larger lattice parameter.
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