• 한국항공운항학회:학술대회논문집
• /
• 2004.11a
• /
• pp.153-156
• /
• 2004

• Computational Structural Engineering
• /
• v.11 no.4
• /
• pp.341-350
• /
• 1998

본 논문은 교통하중에 대한 강사장교의 체계신뢰성에 기초한 체계적이며 실용적인 내하력평가 및 여용성평가 모형을 제안하였다. 고량 주형과 주탑의 조합상관 한계상태에 기초한 내하력평가를 위하여 개선된 조합상관식에 기초한 LRFR(Load and Resistance Factor Rating) 방법과 신뢰성에 기초한 시스템수준의 평가를 위해서 목표체계신뢰성지수의 항으로 표현되는 등가시스템저항강도에 의한 접근방법을 제안하였다. 또한 시스템의 여용성을 정의하기 위해서 체계신뢰성해석의 결과와 내하력평가 결과를 이용한 실제적인 시스템여용성 평가방법을 적용하였다. 제안한 체계신뢰성에 기초한 평가방법은 기존의 요소신뢰성 방법에 비해 구조물의 여용성을 충분히 반영하는 상당히 합리적이며 실제적인 결과를 보여주는 실용적인 방법으로 판단된다.

• Korean Journal of Bronchoesophagology
• /
• v.16 no.1
• /
• pp.5-10
• /
• 2010

Objectives The purpose of this article was to review the video-assisted mediastinoscopic surgery (VAM) as diagnostic or therapeutic tools. Summary The VAM was indicated in diagnosis of pleural diseases, dissection or sampling of mediastinal or paraesophageal lymph nodes, nodal staging in lung cancer, or various therapeutic approaches. The advantages of VAM were included that was less painful, cosmetic merit, no need additional drain, and no effect of cardiopulmonary function. It was provided to surgeons wider and more detail operational field rather than conventional mediastinoscopic surgery. It was useful tool as training beginner surgeon, Although the VAM had limited indications, it would be feasible and important multi-purposal operational tools in mediastinal, pleural and lung diseases.

• Journal of the Korean Society of Costume
• /
• v.50 no.3
• /
• pp.43-58
• /
• 2000

This study is an analysis on the costumes of two statuettes of standing women made with three colored cermai excavated from Parhae tomb in Shiguo(석국), Chilin province(길림성), China. These statuettes wear similar clothing ; A narrow sleeved under-blouse with a decollette neckline and a long skirt tied above the bosom. But their hairstyles are quite different ; one has a bun top of the head which tipped slightly forward. the other has two buns with two loops near ears. Their shoes are a little different: in the former the top of the shoes are a little crooked, but in the latter they are high-fronted and more crooked. These two statueettes are valueable and unique source which demonstrates the female costumes of Parhae dynasty, and at the same time which accounts for the acceptance and assimilation of costumes of Tang dynasty. Base upon the analysis on their costumes, hairstyles , and their expressions of the body shape, two statuettes seem to be made after the early 8th century.

• Computational Structural Engineering
• /
• v.11 no.4
• /
• pp.351-360
• /
• 1998

본 논문에서는 실용적 체계신뢰성에 기초한 강사장교의 안전도평가를 위한 체계적인 모형을 제안하였다. 공용중인 강사장교의 시스템 안전도평가를 위하여 요소신뢰성해석을 위한 케이블, 주형 그리고 주탑의 한계 상태모형과 각 요소들간의 조합파괴를 포함하는 주파괴경로를 정의할 수 있는 체계신뢰성해석 모형을 제안하였다. 요소신뢰성해석을 위한 수치해석기법으로는 AFOSM(Advanced First Order Second Moment) 방법을 사용하였고, 체계신뢰성해석을 위해서는 부분 ETA(partial Event Tree Analysis) 모형을 사용하였다. 제안된 방법의 타당성을 고찰하기 위하여 진도대교의 안전도 평가에 적용하였다. 부분 ETA 모혀을 사용한 체계신뢰성 평가 방법은 기존의 요소신뢰성 방법에 비해 구조물의 여용성을 충분히 반영하는 상당히 합리적이며 실제적인 결과를 보여주는 실용적인 방법으로 판단된다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.28 no.6C
• /
• pp.367-377
• /
• 2008

As part of study to develop LRFD (Load and Resistance Factor Design) codes for foundation structures in Korea, resistance factors for static bearing capacity of driven steel pipe piles were calibrated in the framework of reliability theory. The 57 data sets of static load tests and soil property tests conducted in the whole domestic area were collected and these load test piles were sorted into two cases: SPT N at pile tip less than 50, SPT N at pile tip equal to or more than 50. The static bearing capacity formula and the Meyerhof method using N values were applied to calculate the expected design bearing capacities of the piles. The resistance bias factors were evaluated for the two static design methods by comparing the representative measured bearing capacities with the expected design values. Reliability analysis was performed by two types of advanced methods: the First Order Reliability Method (FORM), and the Monte Carlo Simulation (MCS) method using resistance bias factor statistics. The target reliability indices are selected as 2.0 and 2.33 for group pile case and 2.5 for single pile case, in consideration of the reliability level of the current design practice, redundancy of pile group, acceptable risk level, construction quality control, and significance of individual structure. Resistance factors of driven steel pipe piles were recommended based on the results derived from the First Order Reliability Method and the Monte Carlo Simulation method.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2001.05a
• /
• pp.483-486
• /
• 2001

Home Networking is the last connection point for global information and telecommunication infrastructure establishment. Information infrastructure has been constructed to matured extent so far, and then the enhancement of data transferring performance and high speed capacity in houses tame to the problem to solve as the last communicating area. In addition, to hold such communicating rapacity in houses, the customer premises technology is important as the framework. In this paper, introducing various home networking technologies, prospect of premise technology is reviewed.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.12 no.3
• /
• pp.175-182
• /
• 2008

In this paper, through the study and consideration of the recently prominent monitoring of cable stayed-bridge, practical but reasonable suggested for the evaluation of the probabilistic safety of the bridges using probable measured data from monitoring measurement system. It is shown in the paper that the live load effects can be evaluated using measured data of cable-stayed bridge and this the realistic probabilistic safety of the cable-stayed bridge could be assessed in term of element reliability and system reliability. As a practical method for the evalution of the system reliability of system cable-stayed bridges partial ETA method is uesd, which can find the critical failure path including combined failure modes of cable, deck and pylon. Compared with the conventional safety analysis method, the propsed approach may be considered as the practical method that shows the considerably actual and reasonable results the system redundancy of the structure.

• Magazine of the Korea Concrete Institute
• /
• v.7 no.3
• /
• pp.187-198
• /
• 1995

This paper develops practical and reallstic reliabllity models and methods for the evaluation of system rehability and system rellabllity based ratlng of R.C box glrder bridge superstructures. The precise prediction of reberved carrying capacity of bridge as d system is extremely difficult especially when the brldges are highly redundant and slgnlficantly deter 1or;itcd or dainagetl. Thls papel proposes a nt2w approach for the evaluation of reseived system c,drrying capaaty of br~dges in terms ot equ~vdleiit system strength, which may b~ ddcflned as a brtdge system strength correipcmdlng tu the system rehability of the bridge. This cm be ticrAvcd from an Inverse process bami or1 the con~ept of FOSM(F1rst Order Second Moment) form of system reliabihty index. The sf rength llmt state models for K C box girder br~dges suggested In the paper dre based on the basi~ bending and shear strength And thc system reliatxllty pro,~lerri of box gritier super structure 1s formuldted as parallel serles models obtalncd f ~ o m thc FMA(Fdilure blode Rp proath) based on major failure mc>clmusrns or c~itlcal fdure ,>tatcs of each nuder .WOSM(Ad-vanced First Order Second Moment) and IST(1mportance Sampling Technique) simulation algorithm are used for the reliability analysis of the proposed models.

• Culinary science and hospitality research
• /
• v.17 no.4
• /
• pp.263-272
• /
• 2011

For tomatoes containing valuable nutrients and biological active substances, this study examined differences in the ascorbic acid, lycopene, ${\beta}$-carotene, and ${\alpha}$-carotene contents in processed tomato products according to tomato cultivar and the part of fully ripened tomatoes. According to the results, the ascorbic acid content was different among tomato cultivars, and it was far higher in jelly than in pulp among the parts of tomatoes. The ascorbic acid content in processed tomato products was higher in tomato juice than in other types of tomato products, but the difference was mainly from various additives used in addition to tomatoes; therefore, it was somewhat unreasonable to compare the ascorbic acid content among the products. It was found that the lycopene content was not significantly different between pulp and jelly in each cultivar. In most of the cultivars, the ${\beta}$-carotene content was not significantly different according to the parts, but in cultivar yeoyong, the content was 2.7 times higher in jelly than in pulp. The ${\alpha}$-carotene content was highest in both pulp and jelly for all the cultivar, and the lycopene and ${\beta}$-carotene contents were lowest regardless of parts for cultivar Yellow Carol. ${\alpha}$ carotene was not detected in either pulp or jelly. The lycopene, ${\beta}$-carotene, and ${\alpha}$-carotene contents showed significant difference among processed tomato products, and the difference came mainly from the type of processing and additives. Tomatoes have superior characteristics, but they are usually consumed uncooked in Korea. Thus, this study aimed to contribute to the various forms of consumption of tomatoes, that is, the development of various nutritionally excellent cooking methods using processed tomato products.