• 한국콘텐츠학회논문지
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• 제5권6호
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• pp.146-151
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• 2005

산호는 아름다운 적색의 귀한 유기질 보석으로, 오래전부터 우리나라를 비롯한 아시아에서 선호되어온 전통적인 장신구에 많이 애용되었다. 천연산호와 모조산호에 대한 보석학적 특징을 비교 연구하여 보석으로 사용되는 산호를 감별할 수 있는 기초적인 자료를 만드는 것이 중요하다. 천연산호와 모조산호를 감별하기 위하여 산호의 색, 광택, 투명도, 조흔색, 굴절률, 경도, 염산 반응, 형광 반응, 비중, 편광 현미경 관찰, 전자 현미경 관찰, 화학 분석 및 X선 회절 분석 등의 감별 방법을 실시하였다. 그 결과, 천연 산호의 주성분은 $CaCO_3$이고, 방해석 결정구조를 가지고 있으며 모조 산호들은 탄산염 또는 기타 물질에 색소를 넣어 제조하였음을 알 수 있었다. 그리고 천연 산호와 모조 산호는 X선 회절 분석에 의하여도 구별 되지만 비중, 굴절율, 염산 반응 등과 같은 몇몇 간단한 일반적인 실험을 통해서도 서로 비교되어 감정이 가능하다. 천연산호는 모조 산호에 비해 경도가 높아서 광택이 더 뛰어나다. 파괴검사인 조흔색 확인 작업으로 활용한다.

• 한국과학교육학회지
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• 제14권2호
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• pp.236-240
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• 1994

Recently computers are transforming our classroom by means of initiating and expanding teaching and learning. Lloyd (1989) indicates that computers show great promise in a way augmenting the classroom instructional process under the guidance of the teacher. In this paper computer program for mineral identification (called CPMI) is introduced. This program is is to provide a short list of 26 minerals. These mineras are classified using some properties for mineral identification that is color, streak, hardness, specific gravity, luster, and crystal form. Mineral properties can be divided into two groups for operating this program: (1) properties with numeric values, that is hardness and specific gravity; (2) properties whith a single word, that is color, streak, luster, and crystal form.

• 한국자동차공학회논문집
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• 제5권1호
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• pp.120-128
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• 1997

The variations of the temperature field in a passenger compartment were measured by using a HSI true color image processing system and TLC(Thermochromic Liquid Crystal) solution. This temperature measurement technique was proved to be useful for analyzing the ventilation flow. The flow field in the passenger compartment was visualized using a particle streak method with pulsed laser light sheet. The temperature field and flow field in the passenger copartment were affected significantly by the ventilation mode. The panel-vent mode heating had shorter elapse time to reach a uniform temperature than the foot-vent mode under the same ventilation condition and nonuniformity inside the passenger compartment could be minimized effectively by using the bilevel heating mode. The temperature increase rate in the rear passenger compartment was iower than the front compartment, especially in the vicinity of the rear seat occupants' knee level.

• 한국광학회:학술대회논문집
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• 한국광학회 1990년도 광학 및 양자전자학 워크샵
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• pp.94-100
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• 1990

The rapid quenching dynamics of the F-center excitation by CN- defects in CsCl crystals were investigated by monitoring the ground state bleach recovery kinetics of F-centers, using a picosecond streak camera absorption spectrometer. The F-centers in CN- doped quenched samples show two bleach recovery components. Optical aggregation converts the slow component to the fast component. The slow one is due to the normal relaxation of the F*-centers as found in CN_ free crystals. The fast one is due to the energy transfer of the F-center electronic excitation to the vibrational energy levels of CN_ molecualr defects. The energy transfer occurs only in the F-center-CN_ defect pairs, FH(CN_)-centers.

• 대한기계학회논문집B
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• 제32권4호
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• pp.241-248
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• 2008

The purpose of the research is to investigate of diesel spray combustion for simultaneously reduction way of NOx and PM. The diesel injection were done into intermediates that are generated by very lean DME HCCI combustion using a RCM. The concentration of intermediate could not be directly measured, so we estimated it by CHEMKIN calculation. Two dimensional spontaneous luminescence images which are created by chemical species reaction at low temperature reaction (LTR) and high temperature reaction (HTR) are captured by using a framing streak camera. Also, combustion events were observed by high-speed direct photography. The ignition and combustion events were analyzed by pressure profiles and the KL values and flame temperatures were analyzed by the two-color method.

• 한방안이비인후피부과학회지
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• 제13권2호
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• pp.1-19
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• 2000

1. The furuncle is nail shaped, whitch tip is sharp and root is deep, very dangerous. It's progress is so rapid and it corresponds to the acute suppurative infection of western medicine. 2. The cause and pathology of the furuncle were divided into three parts, inappropriate care (improper diet and excessive sex), surgical trauma (epidernic infection by domestic animal as like cattle, hoarses, pigs, sheep etc), external evil. 3. The early syndrome of the furuncle is swollen pain, various change of color, fidgetiness, restlessness, aversion to cold, headache, nausea and vomitting etc. Though apply acupuncture, there is no pain and bleeding. There may be streak of blood, curdy of muscles and widen swolling. If it is progressed, its sphere becomes diffuse. This is called as the serious case of furuncle(정독주황). 4. The maim treatment of the furuncle is clear away heat and toxic materials. The method was moxibustion, sticking-plaster, purge blood, oral taking the medicine of detoxication and fire extinguishing etc. 5. The main prescriptionst are omisodokyum(五味消毒飮), hwangyeonheadoktang(黃連解毒湯), ohyangyeongyotang(五香連翹湯), hyeongbangpaedoksan(荊防敗毒散) and so on. The main external prescriptionst are okrhosan(玉露散), cheonchugo(千 膏), guildao(九一丹), palyidan(八二丹), taeyulgo(太乙膏), hongyugo(紅油膏) and so on.

• 한국유체기계학회 논문집
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• 제16권5호
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• pp.24-28
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• 2013

Visualization of internal flow of a regenerative blower has been made by injecting a tracer directly into the flow. For the convenience of visualization, working fluid has been replaced by water and marbling color oil has been used as a tracer. Oil droplet has been injected near the inlet of the blower and the streak has been recorded using a high speed camera with the illumination of high power light sources. At first, droplets have irregular motion in the near inlet area and enter into a groove of the impeller. Then the droplets circulate inside the groove while translated by the rotational motion of the impeller. When the droplets get out of the impeller groove, their speed is lower than that of impeller. And the droplets repeatedly enter into the groove and circulate inside the grooves. Then the droplets either flow to the outlet or reenter into the inlet area through stripper. Through this experimental study, internally circulating motion of the flow inside a regenerative blower has been characterized.

• Animal Systematics, Evolution and Diversity
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• 제31권2호
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• pp.122-127
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• 2015

The subfamily Ennominae is one of the most species-rich taxa of Geometridae that include more than 9,700 species worldwide and over 280 species in South Korea. Herein, we present the first report of five species of Ennominae. Abraxas flavisinuata can be characterized by the white wings, a thick black postmedial line that is medially and dorsally broken with an orange band, large rounded black discal dots on the forewing, and a black dotted postmedial line on the hindwing. Lomographa claripennis can be characterized by the whitish wings, the black undulating postmedial line as well as the minute blackish discal dot on the forewing, and the black undulating postmedial line with a minute black discal dot on the hindwing. Arichanna tetrica can be characterized by the grayish forewings, thick black transverse ante- and postmedial lines, a large blackish discal dot, whitish apical streak on the forewing, and scattered black dots on the whitish hindwing. Apocleora rimosa can be characterized by the brown ground color of the fore- and hindwings, the black slanted ante- and postmedial lines of the forewing, and two black medial lines on the hindwing. Ourapteryx japonica can be characterized by the white wings, the dark brown transverse ante- and postmedial lines with a long discal dot on the forewing, and the dark brownish transverse antemedial line as well as a termen that has a sharp white tail with one large dark reddish dot and one small black dot on the hindwing.

• 한국지구과학회지
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• 제26권7호
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• pp.630-639
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• 2005

이 연구는 36명의 예비과학교사들을 대상으로 화성암의 육안분류 능력을 조사하였다. 이를 위해, 유문암, 안산암, 현무암, 화강암, 섬록암, 반려암들을 암석표본으로 설정하여 질문지와 함께 투여하였다. 예비과학교사들이 육안관찰로 화성암을 분류하기 위해 필요하다고 제안한 도구의 종류는 평균 3개였으며, 이 중, 돋보기와 조흔판, 망치, 모스경도계가 많았다. 전시된 6종의 화성암표본들 중, 예비과학교사들은 화성암을 육안감정하기 위해 현무암과 화강암 표본을 주로 선택하였다. 그러나 선택한 암석표본에 따라 육안감정의 정답률은 큰 차이를 보였다. 유문암표본을 선택한 10명 중 정답은 한명도 나타나지 않았으나, 현무암을 선택한 36명의 모든 학생들은 옳게 응답하였다. 안산암의 경우 8명이 선택하여 $62\%$, 화강암은 32명이 선택하여 $62\%$, 섬록암은 13명이 선택하여 $7\%$ 그리고 반려암은 9명이 선택하여 $44\%$가 옳게 응답하였다. 화성암 표본들을 육안 감정함에 있어서, 현무암의 경우에는 다공질조직, 그리고 화강암의 경우에는 암석조직, 색깔, 그리고 일상생활경험에 의존하는 학생들이 많았다. 그러나 일부학생들은 암석표본에서 밝은색과 중간색 그리고 반암을 구분하는데 어려워하였다.

• 자원환경지질
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• 제48권6호
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• pp.501-508
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• 2015

본 연구는 울릉도 나리칼데라에서 산출된 탄화목의 수종식별, 연륜분석, 방사성탄소 연대를 통해 고식생/고환경, 분출연대 및 화산쇄설물의 정치온도에 대한 정보를 제공하기 위해 수행되었다. 탄화목은 울릉도 최후기 화산쇄설층을 대표하는 나리테프라층의 최하부(Member N-5) 부석질 퇴적층 내에서 채취되었으며, 나이테의 원형(횡단면)이 잘 보존된 나무의 가지 부분이다. 분석결과, 수종은 소나무과 중 가문비나무속(Picea spp.)으로 식별되었으며 최외각 나이테의 연륜은 $263+{\alpha}$ 년으로 확인되었다. 나이테는 중심(pith)에서 바깥쪽을 향해 그 나이가 점차 젊어지며 $20,260{\pm}230$, $19,995{\pm}245$ 및 $19,975{\pm}265cal\;BP$ 의 보정연대를 가진다. 가장 젊은 연대인 19,710 cal BP 는 Member N-5의 분출과 관련된 연대일 가능성이 높다. 이 결과는 후기 플라이스토세 동안 울릉도 나리칼데라는 가문비나무가 번성하였으며, 한랭 습윤한 기후조건하에 있었음을 지시한다. 광택, 취성, 색 및 조흔색 등의 특성에 기초하면, 탄화를 야기한 화산쇄설물의 최소 온도는 약 $350{\sim}500^{\circ}C$ 정도일 것으로 추정된다.