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침윤된 Si 및 성형체내 Carbon Source의 양이 반응소결 탄화규소 다공체의 기공률 및 파괴강도에 미치는영향
윤성호,Phung Nhut Tan,김영도,박상환 한국세라믹학회 2007 한국세라믹학회지 Vol.44 No.7
A porous reaction bonded silicon carbide (RBSC) was fabricated by a molten Si infiltration method. The porosity and flexural strength of porous RBSC fabricated in this study were dependent upon the amount of carbon source used in the SiC/carbon preform as well as the amount of Si infiltrated into the SiC/carbon preform. The porosity and flexural strength of porous RBSC were in the range of 20 vol.~49 vol.% and 38~61MPa, respectively. With increase of carbon contents and molten Si for infiltration, volume fraction of the pores was gradually decreased, and flexural strength was increased. The porous RBSCs fabricated with the same amount of molten Si show less residual Si around neck with increase of carbon source, as well as a new SiC was formed around neck which resulted in the decreased porosity and improvement of the flexural strength. In addition, decrease of the porosity and increase of the flexural strength were also obtained by increase of the amount of molten Si with the same amount of carbon source. However, it was found that the flexural strength of porous RBSC depends on the porosity rather than the amount of the newly formed SiC in neck phase between SiC particles used as a starting material.
윤성호,조경선,Phung Nhut Tan,정훈,김영도,박상환 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.8
Reaction bonded silicon carbide(RBSC) composite for heat-exchanger was fabricated by molten Si infiltration method. The raw materials with variable particle sizes were used in this experience. The finer the particle size in sintered silicon carbide was the more increasing 3-point bending strength and fracture toughness. As the adaptable particle sizes had been occupied interstice arising from packing sample, the mechanical properties were increased. In the PCS1-1 sample, the 3-point bending strength and fracture toughness were 323MPa and 4.9MPa·m1/2, respectively. Reaction bonded silicon carbide(RBSC) composite for heat-exchanger was fabricated by molten Si infiltration method. The raw materials with variable particle sizes were used in this experience. The finer the particle size in sintered silicon carbide was the more increasing 3-point bending strength and fracture toughness. As the adaptable particle sizes had been occupied interstice arising from packing sample, the mechanical properties were increased. In the PCS1-1 sample, the 3-point bending strength and fracture toughness were 323MPa and 4.9MPa·m1/2, respectively.
Immunotherapy for Non-Small Cell Lung Cancer
윤성호 대한결핵및호흡기학회 2014 Tuberculosis and Respiratory Diseases Vol.77 No.3
Lung cancer is the leading cause of cancer-related mortality worldwide, and more than 80% of cases are of non-small cell lung cancer. Although chemotherapy and molecularly targeted therapy may provide some benefit, there is a need fornewer therapies for the treatment of patients with advanced NSCLC. Immunotherapy aims to augment the recognition of cancer as foreign, to stimulate immune responsiveness, and to relieve the inhibition of the immune response that allowstolerance to tumor survival and growth. Two immunotherapeutic approaches showing promise in NSCLC are immunecheckpoint inhibition and cancer vaccination. Although currently immunotherapy does not have an established role inthe treatment of NSCLC, these patients should be enrolled in formal clinical trials.
윤성호 한국영어영문학회 2007 영어 영문학 Vol.53 No.5
generalized sense of place that has rebuilt the AmericanDream. In this regard, Ichiro’s suburban fantasies are effectively embed-ded as a palimpsest against which one is enabled to assess how for
Verification of the Information Privately Owned by a Principal
윤성호 한국계량경제학회 2008 계량경제학보 Vol.19 No.3
We study a principal-agent relationship in which the information privately owned by a principal is subject to verification by an uninformed agent. The agent's information verification effort, however, is unverifiable(non-contractible). Therefore, the agent may accuse the truthful principal without verifying the reported information. The principal, in equilibrium, misreports with strictly positive probability to induce the agent to verify the reported information. Moreover, the principal designs the contract such that it is terminated when her misreport is discovered by the agent. Termination of the contract occurs with strictly positive probability on the equilibrium path. We study a principal-agent relationship in which the information privately owned by a principal is subject to verification by an uninformed agent. The agent's information verification effort, however, is unverifiable(non-contractible). Therefore, the agent may accuse the truthful principal without verifying the reported information. The principal, in equilibrium, misreports with strictly positive probability to induce the agent to verify the reported information. Moreover, the principal designs the contract such that it is terminated when her misreport is discovered by the agent. Termination of the contract occurs with strictly positive probability on the equilibrium path.