• Steel and Composite Structures
• /
• v.44 no.2
• /
• pp.225-240
• /
• 2022

Local responses of steel plate-concrete composite (SC) walls under impact loads are typically evaluated using design equations available in the AISC N690s1-15. These equations enable design of impact-resistant SC walls, but some essential parts such as the effects of wall size and shear reinforcement ratio have not been addressed. Also, since they were developed for design basis events, improved equations are required for accurate prediction of the impact behaviors of SC walls for beyond design basis impact evaluation. This paper presents a numerical study to construct a robust numerical model of SC walls subjected to impact loads to reasonably predict the SC-wall impact behavior, to evaluate the findings observed from the impact tests including the effects of the key design parameters, and to assess the actual responses of full-scale SC walls. The numerical calculations are validated using intermediate-scale impact tests performed previously. The influences of the fracture energy of concrete and the conservative aspects of the current design equations are discussed carefully. Recommendations are made for design practice.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 1998.04a
• /
• pp.282-283
• /
• 1998

ISO/FDIS 11342: 1998(E)에서, "회전체 밸런싱의 목표는, 기계 설치후 만족스런 운전(satisfactor running)을 이루는 것이다. '만족스러운 운전'이란, 회전체에 잔류하는 불평형 질량에 기인한 진동이 진동허용치(acceptable magnitude of vibration)를 넘지 않는 것을 의미한다"고 밸런싱을 설명한다. ISO/TC108(Mechanical vibration and Shock)의 Subcommittees 중 SC1은 'balancing, including balancing machines'라는 소그룹명을 갖고 있다. 이 SC에서는 회전체 밸런싱에 관련한 ISO의 제정과 개정의 일을 한다. 1998년 현재 위 위원회를 통하여 새롭게 개정된 ISO/FDIS 11342:1998(E)과 현재 개정 마무리 단계에 있는 ISO/DIS 2953을 간략히 소개한다.

• Archives of Craniofacial Surgery
• /
• v.22 no.1
• /
• pp.56-61
• /
• 2021

Sebaceous carcinoma (SC) is a rare tumor, accounting for approximately 0.7% of skin cancers. SC can be classified as ocular SC (OSC) or extraocular SC (EOSC) depending on its location. Because EOSC accompanied by metastases is rare, there is a paucity of data about EOSC accompanied by metastasis. This study presents a case of an aggressive EOSC of the scalp with lymph node metastases. The patient underwent wide local excision of the primary tumor with a 1 cm safety margin and bilateral radical lymph node dissection. However, recurrence was observed 1 month after surgery. Radiation therapy and resection were performed for the recurrent tumor. However, distant metastases to both lungs eventually occurred. Here, we describe a rare recurrent case of EOSC of the scalp with distant organ metastasis with a review of the literature.

• Asian Pacific Journal of Cancer Prevention
• /
• v.15 no.3
• /
• pp.1441-1446
• /
• 2014

Squamous cell/adenosquamous carcinoma (SC/ASC) of the gallbladder are rare tumors and there are few clinical reports in the literature. Herein we report our clinical experience with 46 patients with SC/ASC and 80 with adenocarcinoma (AC). Expression of EphB1 and Ephrin-B in each tumor was determined using immunohistochemical methods for determination of correlations with prognosis. There was no difference in EphB1 and Ephrin-B expression between SC/ASC and AC tumors (P>0.05), but greater expression in those less than 3 cm in diameter, stage I or II (TNM stage), with no lymph node metastases, with no local invasion and treated with radical resection was apparent. Expression of EphB1 (P<0.05) and Ephrin-B (P<0.01) was higher in well differentiated than in poorly differentiated AC tumors. Kaplan-Meier survival analysis indicated that degree of differentiation, tumor diameter, lymph node metastases, local invasion, surgical approach and expression rate of EphB1 and Ephrin-B were closely related to the survival of SC/ASC (P<0.05) and AC patients (P<0.01). Patients with tumors that positive expressed EphB1 and Ephrin-B, whether it is SC/ASC ($P_{SC/ASC}$ =0.000) or AC ($P_{AC}$ =0.000 or $P_{AC}$ =0.002) had longer survival than those negative expression. Cox multivariate analysis indicated a negative correlation between expression of EphB1 or Ephrin-B and overall survival. Hence, EphB1 and Ephrin-B could be regarded as independent good prognostic factorsand important biological markers for SC/ASC and AC of gallbladder.

• Review of KIISC
• /
• v.11 no.1
• /
• pp.47-54
• /
• 2001

SC27의 WG2는 보안기술 그 자체에 대한 표준을 만드는 Working Group이다. SC27 소개는 한국통신정보호학회지 제 3 권 제 2 호 (1993년 6월) 29∼34쪽을 보기를 바란다. 2000. 10. 17(화)∼20(금) 일본 동경 미나토구 시바코겐 기계진흥회관에서 개최된 21차 회의에 다녀와서 그 얻은 정보를 나누고자 과제별로 진행사항과 회의결과 및 회의 중 특기할 사항들을 정리하였다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 1998.04a
• /
• pp.695-698
• /
• 1998

ISO(the International Organization for Standardization) is a worldwide federation of national standards bodies, from some 120 countries. The technical work of ISO is highly decentralized, carried out in a hierarchy of some 2,700 technical committees(TC), sub-committees(SC) and working groups(WG). The results of the ISO work are published as International Standards. In this paper, main fields of work at the ISO/TC43/SCI are described.

• Review of KIISC
• /
• v.29 no.4
• /
• pp.35-42
• /
• 2019

데이터 중심 사회가 되면서 데이터의 활용에 대한 요구가 증가하고 있으며, 데이터에 포함된 개인정보를 보호하기 위한 국제표준화가 매우 중요하게 되었다. 개인정보보호 국제표준화를 주도적으로 추진하는 표준화 그룹은 국제표준화위원회/전기위원회 합동위원회 1 서브위원회 작업반 5 (ISO/IEC JTC 1/SC 27/WG 5)이다. 본고에서는 이 그룹에서 추진되고 있는 개인정보보호 관련 국제표준화 동향을 제시하고자 한다. 또한 지난 4월 텔아비브 SC27 WG5 회의에서 논의된 개인정보보호 관련 주요 표준화 이슈와 대응 방안을 제시한다.

• Proceedings of the Korean Ceranic Society Conference
• /
• 2003.04a
• /
• pp.171.2-171
• /
• 2003

• Proceedings of the Korean Ceranic Society Conference
• /
• 2000.10a
• /
• pp.45.1-45
• /
• 2000

• Proceedings of the Korean Ceranic Society Conference
• /
• 2002.10a
• /
• pp.112.1-112
• /
• 2002