관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

MRAC를 이용한 로보트 매니퓰레이터의 制御性能 向上에 관한 硏究 : Model Reference Adaptive Controller

김병수,김규로,선양래 慶熙大學校 大學院 1995 高凰論集 Vol.16 No.-

This paper is study on trajectory property of 6 DOF robot manipulator. This paper used to adaptive control and p-d(proportional-derivated) control for control methods, Simulation robot is stanford 6-dof robot manipulatr of stanford university. Main results obtained through this paper are summarized as followings. At each links, adaptive control has more excellant control than p-d control. At 1-st link, adaptive control and p-d control has a little error at 3.0 second. At 2 nd link, adaptive control and p-d control has a little error than other links without 3-rd link, At 3-rd link, two control methods has a superiority control results than other links with two control methods. At 5-st link, p-d control error is a most great than other links. Therefore, the adaptive control applications for 6-dof robot manipulator has a very excellant capability than applying classical p-d control.

염분이 함유된 폐수의 생물학적 처리시 염분농도가 오염물질의 제거에 미치는 영향

김상수,문병현,이택순,서규태,공남식 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-

Effects of salt concentration and C/N ratio on pollutants removal efficiencies were investigated in treatment of seafood wastewater by sequence batch reactor(SBR). The synthetic seafood wastewater containing salinity from 3,000 to 10,000 mg/L NaCI and C/N ratio of 2 and 4 was treated by SBR. Removal efficiencies of COD_(Mn), T-N, and T-P decreased with increasing salt concentration, but eventually reached a pollutants removal a platrau. As systems adapted in salts until salts concentration of 8,000mg/L, the time required to reach the pollutants removal efficiencies at steady state was reduced. However, the removal efficiencies of pollutants sharply decreased and the time require to reach steady state was increased as salt concentration rose to 10,000mg/L, Removal efficiencies of COD_(Mn) were higher for C/N ratio of 4 than for 2. Effects of salt on the nitrogen removal were not faster than the organic removal but the time required to the nitrogen removal at steady state was ncreased. The removal efficiencies of phosphorus also were redueed as salt concentration increased, which inhibited the release of phosphorus than the uptake.

역설계 시스템에 의한 자동차용 프레스 제품의 검사

김수용,한민식,김태호,조규재,전언찬 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.2

This study is an inspection of press forming product and mould using reverse engineering system. The inspection process on production field involves a lot of errors because of the hand-work so we focussed on improving the measured precision through performing the effective inspection using 3D non-contact scanner. By so doing that. we improved the precision of press forming product by analyzing the cause following the inspection result. Through the inspection, we applied it to the reverse engineering and we could improve the inspection process.

연약 점토지반 성토시 Geotextile 효과의 실험적 연구

김수일,배규진 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.1

Geotextile effects for embankments on weak clays are studied through the laboratory model experiments. The experiments are carried out in four stages; no geotextiles between clay-crushed stone boundary, geotextiles with no pretensioning, and two different geotextile pretensionings. The experimental model has dimensions of 32cm x 330cm in plan. The height for the clay container is 60cm. The 47cm height of crushed stones are laid on top of the 50cm clay layer. When geotextiles are employed, the geotextiles are laid between clay-crushed stone boundary. The time dependent deformations are measured utilizing the LED indicating lamp matrix inserted in the crushed stones and the dial gages put on top of the clay layer where the crushed stones are not laid. The measurements are carried out for 15days which is approximately equivalent to the 50% consolidation level. From the experiments, it is found that the geotextiles are more effective in horizontal displacement reduction than in vertical displacement reduction, especially when the geotextiles are pretensioned before embankments. It is also found that the time dependent settlement behavior is almost identical whether geotextiles are applied or not, and that the vertical displacements when geotextiles are employed are linearly decreased with increasing tensile stresses developed in the geotextiles.

생물학적 폐수처리시 휴지기간이 처리특성에 미치는 영향에 관한 연구

김상수,문병현,서규태,이택수 7개 국립대학교 환경연구 논문집 공동발행 위원회 2004 공업기술연구 Vol.4 No.-

Under recent situation of more stringent effluent regulations, small scale biological process for industrial wastewater treatment has on operational problems, such as highly variable loadings into the system. Especially, the seafood processing industry has difficulties to treat is because of its highly variable organic loading and high saline concentration (>30g/d㎥). High salt concentrations disrupt metabolic functions and cause plasmolysis and/or loss of activity of microbial flora, hence the biological treatment of the saline wastewaters could produce low COD removal efficiency. On the basis of background mentioned above, an appropriate operation of the existing treatment plant is required for stable effluent discharge at even highly influent loading. In this study, effects of long term ( days) idle periods on floc characteristics were investigated in treatment of saline wastewater by SBR. Temporal stop of feeding affects biological activity in the reactors and then floc structures such as size and fractal dimension. After a certain period of reoperation for orgnic activity, the size and fractal dimension of floc start to increase.

임신중 알코올 섭취에 의한 기형 유발기전에 관한 연구

김소희,김순선,이규식,손경희,곽승준,채수영,안상미,허만욱,박귀례 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-

임신중에 만성적으로 음주한 산모의 태아는 중추신경계 손상으로 인한 특징적인 이상증상인 소두증 정신발육장애 등 태아 알코을 증후군(fetal alcoho3 syndrome, F,LSB이 나타나는 것으로 알려져 있으냐 분자생물학적 측면에서의 유발기전은 명확하게 밝혀져 있지 않다. 든 연구예서는 in vitro 단기 발생독성시험법 중 하나인 전배자배양댑을 사용하여 랫드 배자의 )1관 발생기에 알코을 및 알코올의 주 군사 체인 아세트알데히드를 처리하여 기형 유발 여부를 관찰하였다. 또한 이들 물질의 기형 유발 기전을 규명하고자 microarray 깡법으로 발현이 변화되는 유전자를 검색하였으며, 알코을 처리로 발현이 변후 되는 유전자의 정확한 확인을 위하여 northern blot analysis 실시 중이다. 임신 9.5일의 랫드 배자에 0.1, 0.5, 1.0% 에란올을 처리하였을 때 성장부진, 뒤틀리거나 꼬렬라진 꼬리, open caudal neura tube, open neural tube, 불완전찬 반전, 불규칙적이고 비정상적인 체절과 짧은 꼬리 등의 이상이 나티났다. 임신 9.5일의 랫드 배자에 Sr10-4, 8.3×10-4, 2.SxIO-3% 아세트알데히드를 처리시 래antois caudal neura3 tube의 발달저해, somite 수 감소, 꺽인 꼬리 등의 이상이 나타났다. Control과 에탄을 처리한 배자로부터 total RNA를 추출하고 poll· A--RNA를 분리한 후, reverse transcriptase를 사용하여 C?3 혹은 Cl·5 형광염료로 tag된 nucleotide로 표지된 probe를 만들어 등량을 시판중인 'toxicotogy chip'의 틴991개의 CDNA 형태의 유전자와 hybr겨iaation시켰다. 에탄을 처리에 의해 'serum deprivation response' gene등의 발현이 유도되었으며, 'rat transcription factor MaflmRNA'등의 발현은 저해되었다. It is reported that alcohol drinking by pregnant mothers often leads to abnormal fetal development including fetal alcohol syndrome(FAS) in both humans and experimental animals. The FAS is characterized by prenatal and postnatal growth retardation, distinct craniofacial dysmorphology, and central nervous system dysfunctions such as mental retardation. However, molecular mechanisms for FAS is not completely elucidated as yet. In this study, developmental toxicity of ethanol and its metabolite, acetaldehyde were evaluated using whole embryo culture. In addition genes inducing FAS were investigated by the technique of cDNA microarray. Embryos treated with ethanol showed growth retardation, abnormal tail torsion, open neural tube, open caudal neural tube and abnormal somite at concentrations of 0.1∼0.5%. Also embryos treated with acetaldehyde showed growth retardation including allantois, open caudal neural tube, reduction number of somite and abnormal tail torsion at concertrations of 5×10^(-4)∼2.5×10^(-3)%. RNAs from embryos of control and ethanol treatment were reverse transcribed into cDNA tagged with Cy3 or Cy5 and hybridized with cDNA probe of rat in 'toxicology chip'. Ethanol 0.5% treatment resulted in alteration in expression of several genes including 'serum deprivation response', 'Cide-b' and 'check point suppressor 1'. Northern blot analysis is conducted for identification of genes related to FAS.

Soil-Geotextile System의 이론 및 실험적 연구

김수일,배규진 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1

The effects of geotextile for embankments on weak clays are studied through the laboratory model experiments and the theoretical analysis based on "load-decrease effect" caused by geotextile. The experiments are carried out in four stages; no woven fabrics between clay-crushed stone boundary, fabrics between boundary with no initial pretensioning of fabrics, and fabrics, and fabrics between boundary with two different initial pretensionings of fabrics. In all stages, vertical drains utilizing non-woven fabrics are installed in the clay layer in grid pattern to accelerate the consolidation. The experimental model has dimension of 32㎝x330㎝ in plane. The height for the container is 60㎝. The 47㎝ height of crushed stone embankment is constructed over the 50㎝ deep clay layer. When geotextiles are employed, the geotextiles are laid between clay-crushed stone boundary. The measurements are carried out for 10 days which is equivalent to the time required for the primary consolidation. Theoretical analysis of soil-geotextile system is carried out by applying "load-decrease effect" caused by geotextile to the theoretical analysis of plane strain consolidation without geotextile. For the analysis of plane strain consolidation without geotextile, the computer program developed by A. verruijt is used. The program is based upon a sub-division of the problem field into triangular elements, with the displacement components and the pore stress defined in each node, and linear interpolation in the elements. The predictions of deformations at the base of model embankment show relatively good agreement with the measured values. Especially, the predictions of heaving deformations with geotextile show fairly good agreement with the measured values.

자가혈당측정기 Precision Q.I.D 평가

이수연,이성규,김종원,민원기,박효순 대한임상병리학회 1999 대한임상병리학회지 Vol.19 No.4

바이오에너지 영향 측정을 위한 뇌자기 공명 영상검사의 유용성

김창규 ; 나수경 김천대학교 2007 김천대학교 논문집 Vol.28 No.-

MRI (Magnetic Resonance Image) is the image that devices from the character-istic frequencies of gyroscopic pression of nuclei in magnetic field. To evaluate the imaging quality of an 3.0 Tesla for magnetic resonance image. This paper analyzed the image quality value by magnet field size in pineal gland magnetic resonanceimages. As a result of this measurement, it has been found out through the quantitative assessment that the signal to noise from the 0.3Tesla acquisition MR images were deteriorated for the quality image comparing to those from the 3.0Tesla acquisition images. The 3.0Tesla provides magnetic resonance images with excellent inherent physical image quality. Also this study can be obtainęd the quality image from using magnetic field size in bio-energy effect magnetic resonance images