• KIEAE Journal
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• 제13권4호
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• pp.49-54
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• 2013

released by IEA, 2010, indicated that Korea's GDP, of 8 countries surveyed-Korea, Frans, Germany, Italy, Japan, the UK, the USA, and Australia-was the lowest, but the electric consumption per head was third, following America and Australia. Thus, our government has been striving to reduce energy usage and especially to lessen the energy used in buildings, proposing a variety of road maps such as 'building energy efficiency rating' and 'energy saving design standards of buildings'. Accordingly, this study investigated the effect of the items of machine part among EPI items on the energy saving rate. I measured energy usage by ECO2 program, for simulation program, that is used for the building energy efficiency rating. Result showed that items concerning control of pumps and fans had much more saving rate than the ones concerning efficiency of heater and cooler that had bigger scores assigned among EPI items. Result showed that items concerning control of pumps and fans had much more saving rate than the ones concerning efficiency of heater and cooler that had bigger scores assigned among EPI items. Therefore, I think that grades assigned to items in energy performance index need to be corrected.

• 대한자기공명의과학회:학술대회논문집
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• 대한자기공명의과학회 2001년도 제6차 학술대회 초록집
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• pp.111-111
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• 2001

목적： To evaluate the feasibility of the event-related functional MR study using power grip studying the hand motor system 대상 및 방법： Event-related functional MRI was performed on a 1.5T MR unit in seven norm volunteers (man=7, right-handedness=2, left-handedness=5, mean age： 25 years). A single-shot GRE-EPI sequence (TR/TE/flip angle： 1000ms/40ms/90, FOV = 240 mm matrix= 64$\times$64, slice thickness/gap = 5mm/0mm, 7 true axial slices) was used for functiona MR images. A flow-sensitive conventional gradient echo sequence (TR/TE/flip angl 50ms/4ms/60) was used for high-resolution anatomical images. To minimize the gross hea motion, neck-holders (MJ-200, USA) were used. A series of MR images were obtained in axial planes covering motor areas. To exclude motion-corrupted images, all MR images wer surveyed in a movie procedure and evaluated using the estimation of center of mass of ima signal intensities. Power grip task consisted of the powerful grip of all right fingers and hand movement ta used very fast right finger tapping at a speed of 3 per 1 second. All tasks were visual-guid by LCD projector (SHARP, Japan). Two tasks consisted of 134 phases including 7 activatio and 8 rest periods. Active stimulations were performed during 2 seconds and rest period were 15 seconds and total scan time per one task was 2 min 14 sec. Statistical maps we obtained using cross-correlation method. Reference vector was time-shifted by 4 seconds an Gaussian convolution with a FWHM of 4 seconds was applied to it. The threshold in p val for the activation sites was set to be 0.001. All mapping procedures were peformed usin homemade program an IDL (Research Systems Inc., USA) platform. We evaluated the activation patterns of the motor system of power grip compared to hand movement in t event-related functional MRI.

• 한국항해항만학회지
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• 제44권3호
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• pp.203-210
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• 2020

최근 기후변화로 인한 지속적 자연재해 증가에 대비하여 강력한 방재시스템을 구축하는 것이 중요하다. 더욱이 재해발생시 행정력이 미치는 범위는 한정되기 때문에 주민 자율에 의한 재난 방지 시스템은 더욱 강력해야 한다. 본 연구는 재난에 대한 보호기관과 관리기관의 역할과 이러한 역할에 대한 주민들의 인지도에 관한 연구이며, 그 결과는 다음과 같다. 1) 재난 대비 상호지원기관은 하드웨어 부문에서 관리기관에 의존하고 있다. 2) 소프트웨어 영역에서 재해로부터 보호하는 일부 시스템은 기관의 통제를 받고 특정 부분은 관리 기관의 통제를 받는다. 3) 대피소는 모든 재난에 대처할 수 없기 때문에 지역내 존재하는 다양한 시설을 대피 장소로 활용해야한다, 4) 도시 내에서 일하는 직장인들은 재난 대책 조직에 대해 숙지하고 있으며, 재난 지도를 잘 인식하는 경향이 있어 방재활동의 중심적 담당자로 역할을 할 수 있다고 생각된다.

• 국제초고층학회논문집
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• 제6권2호
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• pp.165-175
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• 2017

The importance of designing urban building complexes so that they obtain 'urban' power, rather than become isolated from the surrounding urban context, has been well recognized by both researchers and practitioners. Nevertheless, most current discussions are made from architects' personal experiences and intuition, and lack a quantitative understanding, to which obstacles include an in-depth exploration of the 'urban' power between building complexes and the urban environment. This paper attempts to measure this feature of 'urban', i.e., 'urbanity,' through a new analytical approach derived from the opendata environment. Three measurements that can be easily collected though the Google Maps API and Open Street Map are applied herein to evaluate high or low values of urbanity. Specifically, these are 'metric depth', i.e., the scale of extended public space, 'development density', i.e., density and distribution of point of interests (POIs), and 'type diversity', i.e., diversity of different commercial types. Six cases located in Japan, China and Hong Kong respectively are ranked based on this analytical approach and compared with each other. It shows that Japanese cases, i.e., Osaka Station City and Namba Parks, Osaka, obtained clearly higher values than cases in Shanghai and Hong Kong. On one hand, the insight generated from measuring and explaining 'urban' power would help to assist better implementation of this feature in the design of urban building complexes. On the other hand, this analytical approach can be easily extended to achieve a large-scale measurement and comparison among different urban building complexes, which is also helpful for design practitioners.

• 천문학회보
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• 제41권2호
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• pp.55.5-56
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• 2016

Turbulence plays an important role in molecular clouds. However, the properties of turbulence are poorly understood. In order to study the influence of turbulence in molecular clouds, we need to sample the turbulent properties in the full range of scales down to sonic scale. We mapped the $20^{\prime}{\times}60^{\prime}$ area covering the Orion Molecular Cloud (OMC) 1-4 region in HCN 1-0 and HCO+ 1-0 with Taeduk Radio Astronomy Observatory (TRAO) 14-m telescope as part of the TRAO key science program, "Mapping turbulent properties of star-forming molecular clouds down to the sonic scale (PI: Jeong-Eun Lee)". In addition, we combine our TRAO data with other molecular line maps ($^{13}CO$ 1-0, $C^{18}O$ 1-0, CS 1-0, $N_2H^+$ 1-0) obtained with the Nobeyama Radio Observatory (NRO) 45-m telescope. To analyze these data, we apply statistical methods, the principal component analysis (PCA) and spectral correlation function (SCF), which are known to be useful to study underlying turbulent properties and to quantitatively characterize cloud structure. We will present the preliminary results of observations and analyses.

• Journal of Biosystems Engineering
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• 제40권1호
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• pp.28-34
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• 2015

Purpose: This study aimed to install an RTK-GPS (Real Time Kinematic-Global Positioning System) and IMU (Inertial Measurement Unit) on a tractor used in a farm to measure positions, pasture topography, posture angles, and vibration accelerations, translate the information into maps using the GIS, analyze the characteristics of grass harvesting work, and establish new technologies and construction standards for pasture infrastructure improvement based on the analyzed data. Method: Tractor's roll, pitch, and yaw angles and vibration accelerations along the three axes during grass harvesting were measured and a GIS map prepared from the data. A VRS/RTK-GPS (MS750, Trimble, USA) tractor position measuring system and an IMU (JCS-7401A, JAE, JAPAN) tractor vibration acceleration measuring systems were mounted on top of a tractor and below the operator's seat to obtain acceleration in the direction of progression, transverse acceleration, and vertical acceleration at 10Hz. In addition, information on regions with bad workability was obtained from an operator performing grass harvesting and compared with information on changes in tractor posture angles and vibration acceleration. Results: Roll and pitch angles based on the y-axis, the direction of forward movements of tractor coordinate systems, changed by at least $9-13^{\circ}$ and $8-11^{\circ}$ respectively, leading to changes in working postures in the central and northern parts of the pasture that were designated as regions with bad workability during grass harvesting. These changes were larger than those in other regions. The synthesized vectors of the vibration accelerations along the y-axis, the x-axis (transverse direction), and the z-axis (vertical direction) were higher in the central and northwestern parts of the pasture at 3.0-4.5 m/s2 compared with other regions. Conclusions: The GIS map developed using information on posture angles and vibration accelerations by position in the pasture is considered sufficiently utilizable as data for selection of construction locations for pasture infrastructure improvement.

• 동굴
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• 제68호
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• pp.99-120
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• 2005

It is a wrong decision to use only topographic and geological maps for the study of pediment morphology in Korea. For the study of pediment morphology it is necessary to survey the earth structure by field techniques. In Korea, pediments are mostly found in granite areas with hardrock cover. But, pediments also developed in gneiss areas and what is worse in limestone areas. So, all areas in Korea developed pediment morphology. Only in South Korea pediments show a direction from south to north or from west to east. They developed only in right angles to each other, either parallel or in right angles to the strike, depending on the bedrock structure. Pediments are found in two levels. The upper level pediments are correlated with the lower level erosion surface. Besides this pediments are found in Hoenggye-ri of the Taegwolryong area in a third level 800m above sea level. The pediments developed in basins, at the lower margins of steep slopes dividing three levels of erosion surfaces and around the residual mountains on the erosion surfaces. The first belong to the early stage of pedimentation, the second to the middle stage and the third to the last stage. Also, in Korea monadnock and residual mountain have developed the pediments are correlated the slope of the hinter mountains. Akagki states that the only pedimentation times have been times of arid climate and that they are dissected by gulley erosion with climatic change, but writer's study proves that pedimentation takes place with eustatic movement, reckless defore-station and convectional rain. These facts indicate that the landforms, geological character and process of erosional cycle of the pediments in Korea resemble much those in the Chugoku Mountains of south wertern Japan, but they are larger in scale than those in the Chugoku Mountains. In conclusion, while Akagki emphasizes the geological character and climatic change in pedimentation, the writer studies prove that eustatic movements, especially the sea level rise after the Wurm age are important factors for pedimentation. Besides this the author's studies allow a classification of gentle slopes.

• 식물분류학회지
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• 제46권1호
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• pp.13-32
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• 2016

나도국수나무족(Neillieae)은 전통적으로 나도국수나무속(Neillia), 국수나무속(Stephanandra), 산국수나무속(Physocarpus)의 3속으로 구성된 장미과의 분류군으로 인식되어 왔다. 그러나, 국수나무속은 최근의 분자계통학적 연구에 근거하여 나도국수나무속에 포함되어, 나도국수나무족은 나도국수나무속과 산국수나무속의 2속으로 구성된 족으로 인식된다. 나도국수나무속은 난형 내지 피침형의 잎, 점첨두 내지 꼬리형의 엽선, 총상 또는 원추화서 및 단심피의 암술을 갖는 특징에 의해 산국수나무속과 뚜렷이 구분된다. 본 속의 식물은 히말라야에서 중국 및 한국을 거쳐 동쪽으로 일본, 남쪽으로 인도네시아에 걸쳐 분포한다. 본 연구에서는 나도국수나무족의 종속지적 연구의 일환으로 나도국수나무속의 분류를 제시하였다. 기준표본을 포함한 표본 조사 및 야외 조사를 바탕으로 형태형질 분석 결과와 현재까지 밝혀진 분자계통학적 연구 결과를 토대로 각 종에 대한 검색표, 모든 학명에 대한 자세한 명명법적인 검증 및 처리를 포함하여 나도국수나무속 및 각 종에 대한 기재, 분포도 및 조사한 표본의 목록을 제시하였다. 본 연구에서는 나도국수나무속에 12종을 인식하였으며, 이 중 3종에서 총 10 변종을 인식하였다. 또한, N. sinensis f. glanduligera 및 N. thyrsiflora의 학명에 대한 선정기준표본을 지정하였다.

• 광물과 암석
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• 제33권4호
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• pp.451-462
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• 2020

2019년(2019년 1월 30일~12월 31일; USGS 자료) 48주 동안에 활동한 화산은 82개이다. 지구상에서 화산은 1년간 평균 80~90여 개가 활동하고 있다. 이들 중 91% 이상이 흔히 "불의 고리"(Ring of Fire)라고 부르는 환태평양화산대에 위치한다. 지금까지 밝혀진 활화산들의 80%가 판의 수렴경계부, 15%가 발산경계부, 나머지 5%가 판 내부에 분포한다는 사실과 잘 부합된다. 조사 기간인 2019년 1월 30일부터 2019년 12월 31일에 이르는 48주 중 가장 빈번하게 활동한 화산들은 Dukono(인도네시아, 48회), Aira(일본, 47회), Ebeko(러시아 46회), Merapi(인도네시아, 37회), Krakatau(인도네시아, 33회) 화산이다. 2018년과 비교할 때 분화한 화산수가 1개 감소하였으나 이는 2018년 화산활동은 50주, 2019년은 48주와 비교할 때 현격한 증감은 발생하지 않았다. 이는 지구상의 화산들의 활동이 안정세를 유지하고 있는 것으로 평가된다.

• Human Ecology Research
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• 제59권4호
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• pp.543-556
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• 2021

This study aimed to investigate the factors that influence multicultural adolescents' proficiency in their mother's native language, or their immigrant mother's native language. A hierarchical regression analysis was performed on data from the survey answered by 1,028 multicultural adolescents aged 15 years old and whose mothers were from foreign countries for the 6th Multicultural Adolescents Panel Study(MAPS) conducted by the National Youth Policy Institute (NYPI) in 2016. The main results are as follows. First, multicultural adolescents' minority language proficiency was generally low and significant differences were observed according to their gender, parents' educational level, household income, and mother's native country. More specifically, a higher proficiency in minority language was found for girls than boys, adolescents with a higher parental educational level, adolescents with a higher income, and adolescents whose mothers were from Japan or China, compared with those from the Philippines, Thailand, or Vietnam. Second, a significant positive correlation was observed between multicultural adolescents' minority language proficiency and 1) foreign culture acceptance, 2) parent's educational support, and 3) the use of the minority language at home. Third, foreign culture acceptance, parents' educational support, and the use of the minority language at home were predictors of multicultural adolescents' minority language proficiency. The study is meaningful in that it examined multicultural adolescents' minority language proficiency, elucidating their bilingual development, whereas previous studies have only focused on their proficiency in Korean, which is the majority language.