• Korean Journal of Biological Psychiatry
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• v.6 no.2
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• pp.259-263
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• 1999

Nefazodone, a newer antidepressant is a phenylpiperazine derivative that inhibits the reuptake of both norepinephrine and serotonin, and antagonizes $5-HT_{2A}$ and ${\alpha}_1$ adrenergic receptors. Compared with SSRIs, nefazodone caused the fewer activating symptoms, adverse gastrointestinal effects(nausea, diarrhea, anorexia) and adverse effects of sexual function, but is associated with the more dizziness, dry mouth, constipation, visual disturbances and confusion. We report on 4 cases of visual disturbances and hallucinations in patients taking nefazodone. It is not certain what mechanisms mediated these side effects, but three mechanisms are possible. 1) Nefazodone, as a 5-HT2 antagonist, might induce visual disturbances. 2) mCPP, metabolite of nefazodone might contribute to the hallucination through action on 5-HT receptor. 3) Dopaminergic enhancing activity of nefazodone might cause hallucination. These case report raises the possibility that dose-related perceptual disturbances may exist with nefazodone. The fact emphasizes the need to pay close attention to all possible drug interactions, particularly in patients treated with multiple psychoactive agents, older patients, and patients with decreased hepatic function.

• Korean Journal of Environmental Agriculture
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• v.19 no.5
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• pp.442-449
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• 2000

The bioremediation is an economic technology to remove the organopollutants from soil. It is often found that the remediation could not remove the compounds below the levels determined by vigorous extractions as required by regulatory agencies. The reason for the reduced bioavailability with increasing time of aging has been accredited to the sequestration of the compounds in remote sites within or between soil particles. Then, the aging could be defined as the time-dependent sequestration. Partitioning and entrapment have been suggested as mechanism for aging. The rate and extent of the sequestration varies among dissimilar soils. The bioavailability of aged pollutants in soil could be measured by bioassays, mild solvent extraction, and soild-phase extractions. The sequestration could be affected by many factors including various soil properties, wetting and drying cycle, and the presence of cosolutes and NAPLs etc. The bioavailability and sequestration should be considered to determine the environmentally acceptable endpoint.

• Journal of KIISE:Computer Systems and Theory
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• v.30 no.2
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• pp.59-67
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• 2003

This paper addresses how model checking methods can be applied to utilization analysis of system. Measuring a system performance using simulation is an easy task but finding the bottleneck in a certain system is not an easy task. Especially, system is getting complicated and interacts with other systems, which makes the analysis very difficult. As an alternative approach, we show that can specify system utilization properties using temporal logic, and can find a reason of a system performance drop easily using model checking.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.113-118
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• 2005

Robots today have wider application fields than they ever have before. They need to work close to humans and fluid and compliable motions are expected of them. This requires redundant degrees of freedom for completing specific task. And conventional motion teaching method cannot be applied to redundant link structures. In this paper, the authors present a proficient, cost-effective and intuitive method for motion teaching. New software to apply this method to a humanoid is also presented. This new method utilizes current sensors to determine which joints to rotate. The experiment shown in this paper is a case of closed link where arms cannot move independently due to the restrictions in between the hands. After the input of several passing points of motion trajectory, the curve fitting is performed by the developed software. This software can insert new points, delete erroneous points and modify existing points. The developed motion teaching method is applied to the Kumdo robot, which is developed by the authors.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.11a
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• pp.97-102
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• 1996

A methodology for estimating the number of failed fuel rods bused on the primary coolant activity in operating PWRs has been developed. This method deals with both the diffusion and the kinetic models. In case of small or medium cladding failures, the diffusion model which can consider different sizes of failure is used, whereas for large cladding failures the kinetic model is used. From the kinetic model, the release-to-birth rate ratio (R/B) is represented as a linear function of the number of failed fuel rods. This has been done by expressing the escape rate coefficient in terms of the slope of log(R/B) versus $log\;{\lambda}$. The present method has been applied to the cases of 26 cycles of several nuclear power plants for which ultrasonic testings were performed. The results show that the present method gives better predictions than the existing computer codes such as IODYNE and CADE.

• Proceedings of the Korean Society of Veterinary Pathology Conference
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• 2003.10a
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• pp.8-8
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• 2003

Schwannoma is a neoplasm of the Schwann cells of the neural sheath [1]. Malignant schwannoma is most commonly seen in the subcutis of the flank or neck area near the salivary glands [2]. It also occurs in the thoracic and abdominal cavities, spinal cord, cranial cavity, the heart, etc. Here, we incidentally found a good case of malignant schwannoma in the subcutis of the lumbar and lumbosacral region in male F344 rat during the carcinogenicity study with diisodecyl phthalate (DIDP). Therefore, we tried to report this case as a good reference of malignant schwannoma. (omitted)

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.33.1-33.1
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• 2011

풍력발전기가 점차 대형화되어가는 추세에 따라 블레이드 역시 점차 길어지고 무거워지는 경향을 보이고 있다. 이는 블레이드뿐만 아니라 풍력발전기 시스템 전체의 하중 및 비용의 증가를 불러오게 되므로, 시스템의 성능 및 하중에 가장 큰 영향을 끼치는 블레이드의 공력특성에 대한 연구가 전 세계적으로 지속되고 있다. 그 중에서도 특히 작동 중 오염에 의한 블레이드 표면 거칠기 변화는 블레이드의 공력특성을 변화시켜, 발전기 전체의 성능뿐만 아니라 전체 하중에도 영향을 끼치는 주요 인자이다. 따라서 풍력발전기 블레이드 설계 시에 예측된 설계하중과 실제 운용 환경에 의해 변화된 운용하중 간의 차이를 예측할 수 있다면, 블레이드 설계 시에 표면 거칠기 변화에 따른 영향을 고려함으로써 실제 운용 환경에 맞는 최적의 블레이드 및 풍력발전기 시스템 설계를 수행할 수 있다. 본 연구에서는 블레이드의 표면 거칠기 변화에 따라 풍력발전기 하중이 어떻게 영향을 받는지에 대하여 분석하였다. 이를 위하여 표면 거칠기 민감도를 고려하지 않고 설계된 기준 블레이드와, 운용 중 표면 거칠기가 변화된 블레이드의 2개 모델에 대한 하중해석을 수행하고 그 결과를 비교하였다. 보다 실제적인 해석을 위해 Multi-MW 급 풍력발전기 시스템 모델을 대상으로 최적 설계된 블레이드를 기준 모델로 삼았다. 하중계산방법은 IEC 및 GL 2010 가이드라인을 참고하였으며, 일부 주요 극한하중 상황에 대하여 해석을 수행하여 설계하중상황(design load case, DLC) 별로 하중의 증감 및 경향을 비교하였다.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.8 no.1
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• pp.10-16
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• 2005

This experiment was conducted to study on application of several Korean native plants by seed spray methods for cut slope revegetation, and possibility of replacement almost imported tall fescue seeds by native herbaceous plants. So, we investigated growth and covering rate after sowing native plants seeds at the artificial slope plots in Suwon and the rock exposed cut-slopes in Wonju city. Emergence rate after seed spray at artificial slopes were higher Elsholtzia splendens and Dianthus superbus var. longicalycinus, showing the highest in E. splendens. Also, E. splendens, D. superbus var. longicalycinus, and Agrostemma coronaria were possible to use for seed spray at the rock exposed cut-slopes. The plots of mixed native plants show more seasonal scenery than that of tall fescue. Soil surface run-off by Typhoon was less in plot sown native plants than those of lawn grass, resulting fresh weight of roots was heavier. Thus, we found that the mixed seed spray of several native herbaceous plants, E. splendens, D. superbus var. longicalycinus, and Agrostemma coronaria, were well covered the slopes as tall fescue.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.10a
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• pp.585-590
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• 1997

The condonation models in the standard RELAP5/MOD3.2 code are assessed and improved based on the database, which is constructed from the previous experimental data on various condonation phenomena The default model the laminar film condonation in RELAP5/MOD3.2 does not give any reliable predictions, and its alternative model always predicts higher values than the experimental data Therefore, it is needed to develop a new correlation based on the experimental data of various operating ranges in the constructed database. The Shah correlation, which is used to calculate the turbulent film condensation heat transfer coefficients in the standard RELAP5/MOD3.2, well predicts the experimental data in the database. The horizontally stratified condonation model of RELAP5/MOD3.2 overpredicts both cocurrent and countercurrent experimental data The correlation proposed by H.J.Kim predicts the database relatively well compared with that of RELAP5/MOD3.2 The RELAP5/MOD3.2 model should use the liquid velocity for the calculation of the liquid Reynolds number and be modified to conifer the effects of the gas velocity and the film thickness.

• Journal of Microbiology and Biotechnology
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• v.10 no.6
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• pp.737-752
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• 2000

Wood-rotting basidiomycetous fungi are the most efficient degraders of lignin on earth. The white-rot fungus Phanerochaete chrysosporium has been used as a model microorganism in the study of enzymology and its application. Because of the ability of the white-rot fungus to degrade lignin, which has an irregular structure and large molecular mass, this fungus has also been studied in relation to degrading and mineralizing many environmental pollutants. The fungus includes an array of enzymes, such as lignin peroxidase (LiP), manganese-dependent peroxidase (MnP), cellobiose:quinone oxidoreductase, and $H_2O_2$-producing enzymes and also produces many other components of the ligninolytic system, such as veratryl alcohol (VA) and oxalate. In addition, the fungus has mechanisms for the reduction of degradation intermediates. The ligninolytic systems have been proved to provide reductive reactions as well as oxidative reactions, both of which are essential for the degradation of lignin and organopollutants. Further study on the white-rot fungus may provide many tools to both utilize lignin, the most abundant aromatic polymer, and bioremediate many recalcitrant organopollutants.