• 한국산학기술학회논문지
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• 제4권3호
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• pp.301-306
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• 2003

임베디드 웹서버를 설계하고 리눅스 OS 를 포팅하여 원격지 하드웨어의 제어와 감시 시스템을 구현하였다 리눅스는 2.4.1 버전을 ARM720T보드에 포팅했으며 웹서버는 GPL(General Public License)규약인 Boa web server를 사용했다. 원격지 감시와 제어를 위해 Cirrus Logic사의 ARM720T 칩인 EP7312의 GPIO(General Purpose Inpout Output) 포트에 입출력 디바이스 연결시켜 실험하였다. GPIO 장치 드라이버를 작성하였고, 이를 구동시키는 응용프로그램은 리눅스용 C언어를 CGI프로그램화시켜 클라이언트 PC의 웹브라우저에서 제어와 감시가 가능하게 했다 이는 기존의 PC기반의 웹서버를 사용하는 것 보다 하드웨어 설계 비용을 절감할 수 있고 운영체제없이 구현되는 웹서버보다는 응용범위의 다양성과 개발기간단축이라는 장점을 가지고 있다.

• 대기
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• 제12권4호
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• pp.69-90
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• 2002

The infrared and microwave satellite observations have been used to derive the information of hydrometeors (i.e., cloud and precipitation) and atmospheric temperature. The observations were made by the Nimbus-4 Infrared Interferometer Spectrometer (IRIS) in 1970, and by the Microwave Sounding Unit (MSU) during the period 1980-99, which had channel 1~4 (Chl~4). The IRIS, which has a field of view of ~100 km, has been utilized to examine the cirrus and marine stratus clouds. The cirrus and stratus distributions were obtained, respectively, based on the spectral difference in the infrared window region, and the absorption of water vapor and $CO_2$ in the spectral region $870-980cm^{-1}$. The MSU Ch1 data has been used for low tropospheric temperature and hydrometeors, while the Ch2, Ch3 and Ch4, respectively, for the thermal state of midtroposphere, tropopause, and lower stratosphere. The climatic aspects of El Ni$\tilde{n}$o, Quasi-Biennial Oscillation (QBO) and temperature trends over the globe are discussed with the MSU data. This study suggests that the IRIS and MSU data are useful for monitoring the hydrometeors and atmospheric thermal state in climate system.

• 대한의생명과학회지
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• 제2권2호
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• pp.283-288
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• 1996

최근 한국에 있어서 광절열두조충 감염예가 가끔 보고되고 있다. 저자등은 1994년 10월 강원도 춘천시 거주 남녀 부부가 함께 담수산 송어회를 먹고 감염된 2예에 대하여 보고하는 바이다. 구충은 하제로서 Magnesium sulfate 15gm, 구충제 Praziquantel 15mg/kg를 투여하였다. 제1예는 인ㅇㅇ, 43세 남자, 69kg의 건강체였으며, 구충하여 얻은 충체의 길이 6.65m, 폭 8-13mm였다. 제2예는 최ㅇㅇ, 39세 여자, 56kg으로 소화불량, 복부 불쾌감을 호소하였고, 구충하여 얻은 충체는 5.50m, 폭 8-13mm이었다. 2예 모두에서 두부는 검출되지 않았다. 구충하여 얻은 충체의 외관상 형태, 자궁의 선회, 자궁분지(uterine loops)의 수, 생식공의 위치와 절단표본상 음경낭과 저정낭의 형태, 질의 위치, 자궁구의 위치등과 충란을 광학현미경으로 관찰 한 형태, 크기 및 SEM으로 관찰한 표피의 작은 점각(pits)의 유무, 분포 등 형태학적인 특징등으로 Diphyllobothrium latum으로 동정하였다. 이번의 인체 감염은 담수산 송어회가 원인이 된 것으로 믿어지는 예이다.

• Parasites, Hosts and Diseases
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• 제49권4호
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• pp.449-455
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• 2011

We detected metacercariae of Echinostoma revolutum in Filopaludina sp. snails purchased from a local market in Nam Dinh Province for the first time in Vietnam. Adult flukes were harvested from experimentally infected hamsters at days 14 and 17 post-infection. The metacercariae were round, $170-190{\mu}m$ (n=15) in diameter, with a cyst wall thickness of about $12{\mu}m$. A total of 37 collar spines were arranged around the head collar, and large excretory granules were seen in 2 canals of the excretory bladder. The 14-day old adult flukes were elongated, ventrally curved, and $5.0-7.2{\times}0.8-1.3mm$ (n=20). The head collar had a total of 37 collar spines arranged in 2 alternating rows, including 5 corner spines on each side. The cirrus sac contained a saccular seminal vesicle, a prostatic gland, and an unarmed cirrus. Two tandem testes were smooth or slightly lobed. Eggs were ovoid to elliptical, $110-118{\times}70-75{\mu}m$. These morphological characters were similar to those of E. revolutum and E. jurini. We tentatively identified it as E. revolutum because the validity of E. jurini remains to be elucidated. The taxonomic relationship of E. revolutum and E. jurini is discussed.

• Animal Systematics, Evolution and Diversity
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• 제34권1호
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• pp.37-49
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• 2018

Two hypotrich ciliates, Australocirrus shii (Shi et al., 1997) Kumar & Foissner, 2015 and Afrokeronopsis aurea (Foissner & Stoeck, 2008) Foissner et al., 2010 isolated from freshwater habitats in Korea and were studied based on the specimens from live and after protargol impregnation. Australocirrus shii is redescribed based on morphology and 18S rRNA gene sequence, whereas Af. aurea is the first record for Korea. Main morphological features of the Korean population of Au. shii are as following: body size $100-200{\times}40-80{\mu}m$ in vivo; elongate to ellipsoidal or slightly elongate obovate, dorsoventrally flattened; transverse cirri arranged in (3+2) pattern, anterior pretransverse ventral cirrus distantly anterior of the first transverse cirrus; eight or nine dorsal kineties; and three caudal cirri. Main morphological features of the Korean population of Af. aurea are as following: body size $230-375{\times}70-145{\mu}m$ in vivo; shape elongate obovate or ellipsoidal, widest at the mid-body; undulating membranes in Australocirrus pattern with a buccal depression; and three caudal cirri. The Korean population of A. shii is similar in morphology with previous descriptions except for the presence of indentation at the posterior end in the Korean population. The Korean population of A. aurea is slightly shorter than the South African population and has slightly less marginal and mid-ventral cirri. The phylogenetic analysis of present two Korean hypotrichs and relevant species based on 18S rRNA gene sequences generated almost similar tree topologies compared with previous studies.

• 한국광학회지
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• 제26권1호
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• pp.9-16
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• 2015

얼음 구름과 에어로의 후방산란 특성을 측정할 수 있는 타원 편광라이다를 구성하고 이를 이용하여 에어로졸과 얼음 구름의 특성을 측정하였다. 규격화된 전체 후방산란 뮬러 행렬을 구하기 위하여 3 개의 광학계(${\lambda}/4$ 파장판, ${\lambda}/2$ 파장판, 그리고 빈 공간)로 구성된 조사 광학계와 같은 구조로 된 수신광학계를 통하여 총 9 개의 라이다 시스템을 구축하였다. 구축된 광학계의 체계적 오차를 구하기 위하여 에어로졸의 농도가 낮은 높은 고도의 9 개의 라이다 신호를 이용하였다. 9 개의 라이다 신호를 이용하여 5 개의 광학계 설치 오차(offset angle)와 무질서하게 배열된 에어로졸에 대한 뮬러 메트릭스 요소(2 개)를 찾아내었다. 광학장치를 검정한 후 얼음구름과 에어로졸에서 NBSPM (Normalized Backscattering Phase Matrix)를 구하였으며, 그 결과 에어로졸의 경우 입자의 방향성과 관계되는 NBSPM 의 비대각 행렬이 얼음 구름의 그것보다 작음을 알 수 있었다. 그리고 권운의 경우에도 NBSPM 의 비대각 행렬이 변하는 기상 조건에 따라 달라지는 것을 볼 수 있었다.

• Parasites, Hosts and Diseases
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• 제58권5호
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• pp.499-511
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• 2020

Echinostome metacercariae were investigated in freshwater snails from 26 districts in 7 provinces of upper northern Thailand. The species identification was carried out based on the morphologies of the metacercariae and adult flukes harvested from experimental hamsters, and on nucleotide sequences of internal transcribed spacer 2 (ITS2) and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (nad1) genes. Twenty-four out of 26 districts were found to be infected with echinostome metacercariae in freshwater snails with the prevalence of 40.4%. The metacercariae were found in all 6 species of snails, including Filopaludina martensi martensi (21.9%), Filopaludina doliaris (50.8%), F. sumatrensis polygramma (61.3%), Bithynia siamensis siamensis (14.5%), Bithynia pulchella (38.0%), and Anenthome helena (4.9%). The echinostome metacercariae found in these snails were identified as Echinostoma revolutum (37-collar-spined) and Echinostoma macrorchis (45-collar-spined) morphologically and molecularly. The 2-week-old adult flukes of E. revolutum revealed unique features of the cirrus sac extending to middle of the ventral sucker and smooth testes. E. macrorchis adults revealed the cirrus sac close to the right lateral margin of the ventral sucker and 2 large and elliptical testes with slight indentations and pointed posterior end of the posterior testis. The ITS2 and nad1 sequences confirmed the species identification of E. revolutum, and the sequences of E. macrorchis have been deposited for the first time in GenBank. The presence of the life cycle of E. macrorchis is a new record in Thailand and the snail F. doliaris as their second intermediate host seems to be new among the literature.

• Animal cells and systems
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• 제1권3호
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• pp.419-423
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• 1997

Two new marine tardigrades, florarctus kwoni n. sp. and Batillipes philippinensis n. sp. belonging to Halechiniscidae and Batillipedidae, respectively, are described on the basis of the specimens sieved from sublittoral coral sands and shell gravels of Palawan Island, the Philippines. florarctus kwoni n. sp. is characterized by the rocket-shaped aliform expansion, with the distal margin of posterior ala flattened. Batillipes philippinensis n. sp. closely resembles B. similis Schulz, 1955 and B. annulatus De Zio, 1962. However, it is clearly discernible from the former by the shape of lateral body projection between leg III and leg IV, and the relative length of cirrus E and the spine on leg IV, and from the latter by the shape of the lateral body projection and the clavar shape. This is the first report of the marine tardigrades from the Philippines.

• 한국패류학회지
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• 제32권3호
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• pp.221-229
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• 2016

Fifty-five specimens of Octopus longispadiceus, belonging to the family Octopodidae, were collected for the first time from the East Sea of Korea and identified by DNA barcoding. This species is characterized by its long right third arm and ligula, the presence of enlarged suckers in the mature male, small white spots on the mantle, head, and arms, and no cirrus above the eye. A molecular analysis of the partial cytochrome c oxidase subunit I gene showed that these specimens are all the same species and have the smallest genetic distance with O. longispadiceus (Kimura- two-parameter distance = 0.002-0.003). A new Korean name, "Bal-mun-eo" is proposed for this species.

• 환경생물
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• 제33권2호
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• pp.98-104
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• 2015

Two newly recorded opheliid polychaetes, Armandia amakusaensis Saito, Tamaki and Imajima, 2000 and Polyophthalmus qingdaoensis Purschke, Ding and $M{\ddot{u}}ller$, 1995, from Korean waters are reported with the descriptions and illustrations. Armandia amakusaensis can be clearly distinguished from its congeners by the following characteristics: the prostomium has 2 or 3 subdermal eyespots; total number of setigers are 29; the branchiae are present on the setigers from the setiger 2 to the second or third from the last setiger; the lateral eyespots beginning from the setiger 7 are composed of 11 pairs; the anal funnel has 8~11 papillae and a long cirrus. Polyophthalmus qingdaoensis has the distinguishable characteristics from its relatives as follows: the prostomium has a brain bearing dark pigment-spots; the lateral eyespots are distinct; the body has only dark pigment-streaks on dorsal side. We also provide the keys for distinguishing the species of the genera Armandia and Polyophthalmus from Korean waters.