Park's Vector Pattern의 왜곡률 분석에 의한 BLDC 모터의 권선 고장진단

이대성(Dae-Seong Lee),김준영(Jun-Yong Kim),양철오(Chul-Oh Yang),송명현(Myung-Hyun Song),박규남(Song, Kyu-Nam Park) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.7

붕어의 발육 및 생식에 미치는 비소의 영향

남성숙,이철우,류지성,박응로,남규찬,류홍일,전성환,나진균,최덕일,박광식 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.2

To evaluate the arsenic effect of fish endocrine disruption, crucian carp (Carassius auratus) were treated with 0.5 mg/L and 3.0mg/L of As₂O₃ for 14 days and gonadal development was examined by histological analysis. In ovaries from female crucian carps exposed to 3.0mg/L, immature follicles and atretic follicles were appeared while various normal developmental stages of oocytes were shown in control group. Body weight and Gonadosomatic Index (GSI) of treated carp were also decreased compared to control group. However, no other significant histological changes in liver or kidney were shown in this exposure scheme, This means that reproductive organs are more sensitive than other organs and arsenic may exert endocrine disrupting effect through inhibiting the development of reproductive organ in fish.

접촉수소화에 의한 이산화탄소의 화학적 고정화

박종래,박남국,서성규 여수대학교 1998 論文集 Vol.12 No.2

The chemical fixation of carbon dioxide by hydrogenation over supported Ni catalysts was studied using an atmospheric pressure flow reactor. The mole ratio of carbon dioxide and hydrogen as a reactants was 1:4. The effect of reaction and reduction temperature, loading amount, and support type was examined to the catalytic activity. Also, the physico-chemical properties of catalyst were investigated by XRD(X-ray diffractometer), H₂-TPR(temperature programmed reduction) and NH₃-TPD(temperature programmed desorption). The conversion of CO₂and the selectivity of CH₄were increased with increasing of the reaction and reduction temperature, loading amount, and decreasing of the support acidity.

窒素施用이 在來옥수수 生育 및 種實收量에 미치는 影響

朴良門,趙南棋,金聖培 濟州大學校亞熱帶農業硏究所 1996 亞熱帶農業硏究 Vol.13 No.-

SummaryThis study was conducted to investigate the effect of nitrogen fertilization(0,6,12,18,24,30,36kg/10a) on the change characteristics and grain of local corn(Zea mays L.)The results obtained are summarized as follows; 1.Plant height was greatest at 30kg/10a of nitrogen,being 187.05cm. 2.The numberof leaves and tillers per plant,culm length,ear height and diameter,and length of ear,number of per plant and grain yield were greatest at 12kg/10a of nitrogen. 3.The number of grains per rows was greatest at 6 to 18kg/10a of nitrogen.Nitrogen rate did significantly affected the 100 grain weight and ear weight.

3차원 의료기기용 초음파진단기 프로브 개발

박종수,김성래,남윤수 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

Three-dimensional ultrasonic probes being applied to the medical imaging can be grouped into three depending on the scanning methods, which are a mechanical type system, a free-hand system, and 2D phased arrays system. A mechanical type scanner uses a mechanically driven transducer to acquire series of 2D plane images. By integrating these images, a 3-D medical image can be constructed. A motor driving mechanism is a conventional choice for mechanically driving a transducer assembly which picks the raw ultrasonic images up. In this paper we attempt to design a 3D ultrasonic probe which has a operating mechanism of s tilting 3-D scanning. The motion of a transducer assembly of the ultrasonic probe is analytically modelled. We propose a selection procedure for the diameter of a wire rope driving the transducer assembly and the size of torsional spring which gives an initial tension to wire ropes.

흡연에 의한 급성 호산구성 폐렴 2예

박종빈,김학렬,주현준,유태양,신성남,신정현,송정섭,황기은,김소영,양세훈,정은택 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.2

최근 흡연을 시작한 젊은 성언에서 급성 호산구성 폐렴의 발생에 대한 증례가 보고되고 있다. 급성 호산구성 폐렴은 대개 발열을 동반하기 때문에 초기에는 감염성 폐렴으로 잘못 진단, 치료되는 경우가 많다. 아직 정확한 병태 생리 및 조직학적 소견은 밝혀져 있지 않지만 병력 청취 및 임상 양상, 방사선 소견의 관찰을 통해 급성 호산구성 폐렴을 의심하고, 진단을 위해 기관지 폐포 세척액 검사를 시행한다면 좀 더 쉽게 진단 내릴 수 있을 것이다. 본 저자들은 최근 처음 시작한 흡연에 의해 발생한 급성 호산구성 폐렴을 진단하고, 스테로이드를 투여하여 성공적으로 치료한 환자 2예를 경험하였기에 이를 문헌 고찰과 함께 보고하는 바이다. Acute eosinophilic pneumonia(AEP) is characterized by acute febrile respiratory illness associated with diffuse pulmonary infiltration and pulmonary eosinophilia. The specific etiology for acute eosinophilic pneumonia is elusive. By some investigators, cigarette smoking is suggested as a causative substance which can cause AEP. In recent, the authors experienced two cases of AEP following cigarette smoking. Both cases had characteristic features including age around 20 years, new onset smoking before occurance of AEP, diffuse infiltration on chest radiography, pulmonary eosinophilia based on bronchoalveolar lavage and acute improvement after steroid therapy. These clinical features are resemble with previous smoking induced AEP case reports. Base on these clinical features, cigarette smoking associated AEP could be diagnosed more easily.

감자 養液 pH 및 中間收穫 處理가 塊莖收量에 미치는 影響

朴良門,趙南棋,金聖培,金基澤 濟州大學校亞熱帶農業硏究所 1996 亞熱帶農業硏究 Vol.13 No.-

summaryThis experiment was carried out investigate the effect of solution pH stress and medium harvesting the growth,tuber yield of potato(Soamum tuberosum L.). The results obtained are summarized as follows ; 1.Growth response of potato grown at 60 days after transplaning were not siginficant differences among treatement.Stem length and weight of stem-leaf per plant at 80 days after transplaning were reduced at the treatment of solution pH stress. 2.Stolon length and number of tuber per plant at 80 days after transplaning were greater at the treatment of medium havest as of 57cm and 56.9 tubers. 3.Number of stolon and weight of tubers per plant were not siginificant differences among treatment

Di-2-ethylhexyl phthalate 처리 남아프리카산발톱개구리에서의 vitellogenin 발현

박응로,이철우,류지성,남성숙,전성환,나진균,최덕일,박광식 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.1

The estrogenic potency of di-2-ethylhexyl phthalate (DEHP) using reverse transcriptase-PCR response of liver vitellogenin mRNA in male African clawed frog (Xenopus laevis) was studied. Male frogs were injected with DEHP at dose of 300 ㎍/kg and 300 mg/kg body weight through the dorsal lymph sac. After 4 days, using suitable pair of RT-PCR primers, vitellogenin mRNA induction in the liver was measured and DEHP showed vitellogenin mRNA induction in only the group treated with 300 mg/kg. Any significant histological abnormalities by the exposure of DEHP was not shown in both testis and liver.

오대산 월정사지역 전나무림의 생태학적 연구

남성열,유석인,박완근,한상섭 강원대학교 삼림과학연구소 2000 Journal of Forest Science Vol.16 No.-

본 연구는 오대산 국립공원내 월정사지역에 분포하고 있는 전나무림의 식생구조를 분석하여 이 지역 전나무림의 관리에 대한 기초자료를 제공하기 위하여 수행되었다. 그 결과 전나무림의 층위구조는 교목층(2종류), 아교목층(20종류), 관목층(46종류) 그리고 초본층(87종류)으로 구성되어 있었다. 조사지역에 출현한 전체식물의 중요치는 전나무가 34.09%로 가장 높게 나타났고, 당단풍(23.07%), 청시닥나무(14.44%), 고광나무(10.72%), 오리방풀(8.49%), 복자기(7.80%), 고추나무(7.65%), 산거울(6.79%), 방아풀(5.76%), 고로쇠나무(5.47%), 개다래(5.41%)의 순으로 나타났다. 특히, 전나무의 치수가 전혀 없어 앞으로 아교목층과 관목층을 형성하고 있는 단풍나무류, 참나무류, 피나무류 등의 경쟁에 의하여 천이가 있을 것으로 사료된다. The vegetation structure of Abies holophylla forest was analyzed to provide the information for conservation of Abies holophylla at Wol-jong Temple in Mt. Odae national park, southern Korea. The layer structure of Abiesholophylla forest was consists of tree layer(2 species), subtree layer(20 species), shrub layer(46 species) and herb layer(87 species). The importance value of Abies holophylla was the highest one 34.09% , and those of Acer pseudo-siebodianum, Acer barbinerve, Philadelphus schrenckii, Isodon excisus, Acer triflorum, Staphylea bumalda, Carex humilis, Isodon japonicus, Acer monp and Actinidia polygama were 23.07%, 14.44%, 10.72%, 8.49%, 7.80%, 7.65%, 6.79%, 5.76%, 5.47% and 5.41%, respectivery. Especially, when predicting succession in Abies holophylla forest, such seedlings were not formed and succession was governed by competition of Acer species, Quercus species and Tilia species of subtree and shrub layer. Key words : Abies holophylla forest, importance value, Wol-jong Temple

큐 길이의 변동성을 고려한 적응형 RED방식 큐 관리에 대한 개선 방안

성남규,정충교,박준식 강원대학교 정보통신연구소 2003 정보통신논문지 Vol.7 No.-

The Random Early Detection (RED) active queue management algorithm allows network operators to simultaneously achieve high throughput and low average delay. However, the resulting average queue length is quite sensitive to the level of congestion and to the RED parameter settings, and is therefore not predictable in advance. Adaptive RED proposal of Floyd et al. achieved the predictability in the average queueing delay by lowering the sensitivity to RED parameters and the level of congestion. This algorithm adapts a maximum packet drop rate, max_p, to drive the average queue length in target range with AIMD(Addictive Increasing/Multiplicative Decreasing) using constant increase and decrease factors. We propose a modified Adaptive RED algorithm that has a stable queueing delay with lower variance as well as the predictability of the average queueing delay. In our proposed algorithm, the increase and decrease factors are constantly adjusted to be proportional to the deviation of the average queue length from the target range and the adjustment of the max_p parameter is made in MIMD(Multiplicative Increasing/Multiplicative Decreasing) manner. The low delay jitter characteristic of the proposed algorithm will be very attractive especially to the multimedia streaming service.