• 한국해안·해양공학회논문집
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• 제34권6호
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• pp.198-210
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• 2022

제주 남부 해협은 대마난류의 분기점으로써 한반도 해역 열염순환의 시작점이 되고 태풍, 쓰나미와 같은 해양 재해의 크기와 빈도에 영향을 미치며 유해생물이나 방사능 오염수가 들어오는 공급원이 되는 등 해양지리학적으로 매우 중요한 영향을 미친다. 따라서 이러한 해상재해 및 재난에 대하여 즉각적인 대응을 위해서는 준 실시간의 해양 관측이 필요하다. 그러나 다른 해협에 비하여 제주 남부의 경우 이러한 해상관측이 부족하며 이로 인해 연구결과 또한 저조한 실정이다. 따라서 본 연구에서는 제주 북부에서의 고주파 레이더 설치 경험을 활용하여 제주 남부에서 레이더 관측에 적합한 지역을 산정하고 고주파 레이더를 설치하여 관측을 진행하였다. 이를 통해 제주 남부해협의 광역 표층해류장을 산출하고 APM(Antenna Pattern Measurement)과 FOL(First Order Line)을 통한 후처리 및 자료 개선을 진행하였으며 이에 대해 실측자료를 활용한 비교분석을 진행하였다. 그 결과 상관계수에서 0.4~0.7, RMSE(Root Mean Square Error) 약 1~19 cm/s의 개선 결과를 보였다. 이러한 고주파레이더 관측결과는 자료 개방 네트워크 구축을 통해 차후에 태풍 대응, 수치모델 검증, 광역 파랑자료의 활용, 해양 수색 구조와 같은 국내 현안 문제를 해결하는데 도움을 줄 것이다.

• 한국산학기술학회논문지
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• 제16권8호
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• pp.5673-5682
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• 2015

본 연구의 목적은 최근 고층아파트 단지 내에서 주요 계획요소로 자주 채택되고 있는 저층부 필로티 공간의 이용실태를 관찰조사하고 공간구문론 축선도 분석(axial analysis)을 통한 동선관련 지표값들(연결도, 통제도, 전체통합도, 국부통합도)과 비교하여 단지내 필로티 공간의 배치와 공간 이용 빈도와의 상관관계를 밝혀 향후 아파트 단지내 필로티 공간 배치 계획 시 기초자료로 삼고자 한다. 본 연구의 결론은 첫째, 필로티 공간은 '단순 이동' 공간으로만 주로 이용되고 있어 주민커뮤니티 의식을 향상시킬 수 있는 공간으로 활용되지 못하고 있는 실정이다. 둘째, 주동별 필로티 공간의 이용 빈도 격차는 '돌출형 출입+필로티 부가형' 단지가 '필로티 출입형' 단지 보다 더 심하게 나타나고 있고, 환경파괴(vandalism) 현상도 더 관찰되고 있다. 셋째, 필로티 공간의 이용도는 공간구문론의 동선관련 지표값인 연결도, 통제도, 전체통합도, 국부통합도와 관련이 있으며, 최소 2가지 이상의 지표값이 높은 필로티 공간은 이용빈도가 높은 경향이 있고, 최소 2가지 이상의 지표값이 낮은 필로티 공간은 이용빈도가 낮은 경향이 있음을 알 수 있다.

• 대기
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• 제22권4호
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• pp.401-413
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• 2012

In this study, an investigation has been carried out to understand 1) temporal variation of rainfall amount in summer over south Korea during the 30-year period of 1979-2008 and 2) the relationship between the variation of rainfall amount and the change of large-scale monsoon circulation around 1993/1994 over East Asia. The analysis of rainfall amount is carried out separately for whole summer (June-August), climatological Changma period of 23 June-23 July, and August to consider variations within summer. To relate the variation of rainfall amount with the change of large-scale circulation, we have considered two 15-year periods of 1979-1993 and 1994-2008. This study has used observations at 58 stations in South Korea and NCEP-NCAR $2.5^{\circ}{\times}2.5^{\circ}$ reanalysis data. The major change in synoptic environment for the Changma period is characterized by the intensified anticyclone over Mongolia during 1994-2008, which results in a weak meridional oscillation of Changma front. As a result, rainfall amount for the Changma period and the frequency of extreme events have significantly increased after 1993/1994. A major change of synoptic environment for August is the significant westward extension of the western Pacific subtropical high, which allows not only more moisture transports but also stronger cyclonic circulation over the Korean peninsula. Rainfall amount for August and frequency of extreme events have also increased after 1993/1994. However, variability of rainfall amount is larger for August than that for the Changma period, with some years showing very dry August (monthly rainfall amount less than 150 mm).

• 한국해양공학회지
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• 제32권4호
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• pp.222-227
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• 2018

Most underwater acoustic arrays for low frequency operation are deployed vertically, but a mid-range frequency horizontal array system is being developed by the Korea Research Institute of Ships and Ocean Engineering (KRISO). The horizontal array platform is deployed underwater and kept in place by weather vaning mooring. This is essential because it is nearly impossible to keep a submerged body at a given position in the water without any external force. Hence, the horizontal array platform can maintain the desired position in the presence of a weak tidal current. The objective of this study is to design an underwater platform that can maintain its horizontal position in a weak current. First, the authors investigated various virtual models, selected one of the models, and performed a small model test of the selected model at a basin. We calculated the external forces associated with the 2D motion, and then we conducted a large basin test followed by a circulation water channel test for the manufactured array platform. The results of the simplified 2D motion calculation essentially matched the results of the underwater test.

• 혜화의학회지
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• 제9권2호
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• pp.197-209
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• 2001

In the Literal Study on the Effect of Acupuncture and Moxibustion Treatment on the Bungru, the results were as follows. 1. The Bungru means an abnormal bleeding of femail genetalia. and is devided to Bungjung and Bungha. 2. The etiological factors of Bungru are heat of blood, asthenic coldness. asthenia of chong and ren channels. deficiency of blood, deficiency of vital energy, stagnated blood. and asthenia of spleen & stomach. 3. In the frequency of practical use in Acupuncture treatment, the order was Ren channel, Bladder meridian. Liver meridian, Spleen meridian and Kidney meridian. 4. In the frequency of practical use in Moxibustion treatment, the order was Extra Points, Ren channel, Bladder meridian, Spleen meridian, Liver meridian and Kidney meridian. 5. The most using points of Acupuncture and Moxibustion Treatment on the Bungru were Samumgyo(Sp6), Taechung(Liv3), Hyoihae(Sp10), Umgok(B10), Kihae(CV6), Chung-guk(CV3), Kwanwon(CV4), Unbaek(Spl) and etc. 6. The charicteristics of the most used points were nourishing the spleen, regulating the middle warmer, cleaning the blood, promoting blood circulation, activating blood circulation, promoting the vital energy, regulating the obstruction of vital energy, nourishing the kidney and so on. 7. In the new Acupuncture therapy, Ear-acupuncture, Head-acupuncture, Foot-acupuncture and Skin-acupuncture were used.

• 대한건축학회연합논문집
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• 제20권6호
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• pp.71-80
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• 2018

The path and visibility of nurses in general hospital wards have been treated as architectural planning factors. However, the analysis approach of existing studies shows limitations that only fixed physical elements are considered without considering the behavior of users using space. Consider factors for analysis of ward and models based on this study model. Select a case hospital to apply the analysis technique and conduct the nurse questionnaire and route survey of the hospital. Establish a framework for analysis model applied with the path of nurse movements. The analysis model applies to the case hospital. The analysis results are aggregated to derive design suggestion for reference to the spatial improvement of the ward. Visible visibility to observe the bedside in the nursing station, visibility to observe the beds in the nurse's path, and visibility to observe patients moving in the nurse's path were derived from visual access frequency and exposure frequency. The survey of nurses' movements at the site allowed the nurses to calculate the distance required to move. Reflecting the path of nurse movement, a model was presented for a comprehensive analysis of nursing distance and nursing visibility, which could lead to improvement in the observation and visibility of nurses and the layout of patient rooms or day rooms.

• Ocean and Polar Research
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• 제39권3호
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• pp.169-179
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• 2017

The "GeoDrifter" is a newly-developed surface drifter with high temporal resolution. It is the first time that high-frequency drifters have been deployed in the East/Japan Sea. The purpose of this study is to introduce the phenomena experienced by these drifters flowing along with the Tsushima Current across the East/Japan Sea, focusing on high-frequency variability, and to discuss them in comparison with previous observations. The observed basin-scale circulation of the Tsushima Current generally coincides well with the known schematic circulation. The GeoDrifter trajectories also show inertial oscillations almost everywhere in the oceanic regions of the East/Japan Sea, strong semi-diurnal tidal currents in the western part of Korea Strait, diurnal currents much stronger than semi-diurnal currents in the upstream region of the Nearshore Branch off the Japanese coast, and many warm eddies in the Yamato Basin, all comparable to the observational results reported in the previous studies. An interesting point is that the semi-diurnal tidal currents undergo a great spatial variation in the western part of the Korea Strait. The observed features that cannot be explained are, among others, strong counter-clockwise motions with oscillating period about 51 hours appearing in the upstream region of the Nearshore Branch off the Japanese coast and the different tidal behaviors between upstream and downstream regions of the latter.

• 한국수자원학회논문집
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• 제48권10호
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• pp.817-830
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• 2015

본 연구에서는 기후변화 시나리오의 미래 전망 불확실성 요소를 감안한 근 미래(2011~2040년) 극치 강수전망과 빈도분석을 CMIP5 (Coupled Model Intercomparison Project Phase 5) 9개 GCMs (General Circulation Models)를 사용하여 수행하였다. 또한, 기후자료의 유역규모 비모수적 상세화 및 편이보정 기법을 적용하여, 다중 모델 앙상블(MME)을 통한 불확실성 분석을 수행하였다. 분석결과, RCP4.5와 RCP8.5 시나리오 모두 한반도 근 미래 극치 강수특성인자의 연간 변동성과 불확실성이 커지는 것으로 분석되었으며, 강우빈도해석 결과 2040년까지 50년과 100년 빈도 확률강수량이 최대 4.2~10.9% 증가할 것으로 분석되었다. 본 연구 결과는 다중모델 앙상블 GCMs의 불확실성을 고려한 국가수자원 장기종합개발계획과 기후변화 적응대책 마련 등 기후변화 방재관련 정책결정 및 의사결정 지원 자료로 활용이 가능할 것이다.

• 한국응급구조학회지
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• 제5권1호
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• pp.63-71
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• 2001

Retention of CPR knowledge was assessed in a group of 86 police officers who participated in first aid and emergency rescue program on February, 2001 and 3 months later. Police officers were taken written test about CPR knowledge by American Heart Association Guidelines 2000 and competence level. Data were analyzed by Frequency, Percentage, Mean, paired t-test using SPSS program. The results for this study were as follows ; 1. In the post-test, the highest question was a rechecking time of circulation sign(98.8%), the lowest was a check for signs of circulation(17.4%), in 3months later, the highest question was a chest compression(94.2%), the lowest was a check for signs of circulation(1.2%), and a retention of CPR knowledge was a 71.7%. In 3months later, knowledge level was decreased compared to that of post-test(t=-9.09, p=.000). 2. In 3months later, the competence level was decreased compared to that of post-test(t=3.09, p=.003).

• 대한의용생체공학회:의공학회지
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• 제40권6호
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• pp.235-241
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• 2019

The purpose of this study was to investigate the effect of the body temperature peripheral circulation with vibration shoes in healthy 10 adults. The magnetic vibration device with non-electric power was mounted in the midsole of the vibration shoes. The experiment was divided into two groups: vibration shoes and no vibration shoes. Subjects were randomly selected and measured body surface temperature by digital infrared thermal imaging (DITI) and non-invasive capillaries change by nailfold microscope (NFM). After walking in a treadmill for 15 minutes at 4.0 km/h speed wearing normal shoes or vibration shoes, DITI and NFM were measured. The walking with vibration shoes showed the body surface temperature shift from the proximal to the distal. In addition, the diameter of the nailfold capillary in the vibration shoes group was thicker and clearer due to the increased blood flow than that of the no vibration shoes group. The vibration shoes are easy to apply to anyone who can walk because it can give vibration stimulation by walking without additional time, cost, and effort in daily life. Further studies are needed to explain the physiological effects of vibration frequency and intensity on the long-term perspective of target subjects resulting from vascular dysfunction.