• Journal of Ocean Engineering and Technology
• /
• 제11권3호
• /
• pp.8-19
• /
• 1997

In this study an adequate type of offshore structure at the Sakhalin region as cold region is proposed and its structural design results are presented based on the reliability analysis. Structural safety assessment has been carried out for the proposed offshore structure at the Sakhalin area as designed by the reliability method. And a rational design procedure is presented based on the reliability analysis. Followings are drawn through the present study : - Four colum TLP structure is proposed as an adequate offshore structure type at the cold region like the Sakhalin region and the reliability-based structural design results are presented. It is seen that the proposed type is a more adequate and economic than the fixed type. - Safety assessment of the proposed structure applying the extended incremental load method is performed. - Referring the allowable safety level for offshore structures it has been found present TLP structure has sufficient structural safety at the system level as well as at the component level.

• Bulletin of the Korean Mathematical Society
• /
• 제54권6호
• /
• pp.1951-1967
• /
• 2017

We aim to introduce a further extension of a family of the extended Hurwitz-Lerch Zeta functions of two variables. We then systematically investigate several interesting properties of the extended function such as its integral representations which provide extensions of various earlier corresponding results of two and one variables, its summation formula, its Mellin-Barnes type contour integral representations, its computational representation and fractional derivative formulas. A multi-parameter extension of the extended Hurwitz-Lerch Zeta function of two variables is also introduced. Relevant connections of certain special cases of the main results presented here with some known identities are pointed out.

• Korean Journal of Clinical Laboratory Science
• /
• 제37권3호
• /
• pp.149-154
• /
• 2005

Fifty-one extended-spectrum-${\beta}$-lactamase(ESBL) producing Klebsiella pneumoniae strains were isolated from national university hospitals. All K. pneumoniae strains showed resistance to broad-spectrum antibiotic and most of them presented resistance to amikacin, gentamicin and ciprofloxacin. The results of amplified polymorphic DNA (RAPD) pattern for randomly isolated fifty-one strains were as follows; both twenty-one strains from Chungnam National University hospital and ten strains from Chungbuk National University hospital showed RAPD type Ia and Ib. However, twenty strains isolated from Gyeongsang National University hospital belonged to RAPD type IIa and IIb. All isolates were divided into four molecular types and showed high level of genetic diversity. These results suggested that RAPD analysis provided a rapid and simple method for analysing genotypes of ESBL.

• Nutritional Sciences
• /
• 제5권3호
• /
• pp.146-154
• /
• 2002

The aim of this study was to investigate the effects of household type on the health- and food-related behavior of the elderly. The survey was conducted on 304 free-living elderly persons in Chun-Chon city in 1999. The subjects were divided into three groups by their household types : living alone (n=35), living with their spouses (n=59), and living with their extended family (n=191). The results were obtained by personal interviews using questionnaires. Compared to the group living with their spouses and/or extended families, the elderly living alone were : less satisfied with the amount of monthly pocket money available; less involved in social activities; taking less vitamin supplements; doing less physical exercise; more frequently skipping meals and dining out; less frequently consuming meats, vegetables, fruits and seaweed; and having the highest rate of depression. The elderly living with their spouses tended to have the best physical functions and the greatest ability to carry out basic daily activities. The elderly living with their extended families had a higher incidence of diseases compared to the other groups. The preferred snacks were cookies for the elderly living alone, and fruits for the other two groups. In summary, it has been shown that household type should be taken into consideration for formulating adequate future strategies for effective health and nutrition programs.

• Journal of Satellite, Information and Communications
• /
• 제8권1호
• /
• pp.45-53
• /
• 2013

An electrostatic discharge (ESD) protection device, so called, N-type extended drain silicon controlled rectifier (NEDSCR) device, was analyzed for high voltage I/O applications. A conventional NEDSCR device shows typical SCR-like characteristics with extremely low snapback holding voltage. This may cause latch-up problem during normal operation. However, a modified NEDSCR device with proper junction/channel engineering using counter pocket source (CPS) ion implantation demonstrates itself with both the excellent ESD protection performance and the high latch-up immunity. Since the CPS implant technique does not change avalanche breakdown voltage, this methodology does not reduce available operation voltage and is applicable regardless of the operation voltage.

• Korean Journal of Microbiology
• /
• 제42권2호
• /
• pp.125-130
• /
• 2006

The emergence of extended spectrum ${\beta}$-lactamase producing bacteria is causing very serious problems in Korea. Although there have been many reports about these bacteria Isolated from patients and clinical specimens, there is no report of extended spectrum ${\beta}$-lactamase producing organisms isolated from natural environment in Korea. This study was conducted to investigate the biological characteristics and extended spectrum ${\beta}$-lactamase types of eighteen strains of extended spectrum ${\beta}$-lactamase producing Klebsiella pneumoniae and Escherichia coli isolated from a slaughterhouse in Pusan in Korea during 2002 to 2004. Extended spectrum ${\beta}$-lactamases were identified by double-disk synergy test, conjugation, isoelectric focusing values and gene sequencing. Eight strains of Klebsiella pneumoniae and two strains of Eschericha coli were isolated kom pigs and transferred extended spectrum ${\beta}$-lactamase genes to recipient Escherichia coli J53 (sodium azide resistant and ceftazidime senstive) strain by conjugation. The conjugants of extended spectrum ${\beta}$-lactamase genes were alignments and translated to amino acids by BCM and NCBI blast. Eight conjugants of Klebsiella pneumonae were typed TEM-52, and two strains of Escherichia coli, SHV-12, but CMY-1 type were not detected in this study.

• The Journal of Korean Medical History
• /
• 제26권2호
• /
• pp.23-29
• /
• 2013

Objectives : The purpose of this study is to extend indications of Four-Constitution Medicinal formulas by comparing with formulas on Dongeuibogam(東醫寶鑑), focusing on their composition. Methods : 1. We analyzed the composition of Four-Constitution Medicine formula which are mentioned on Donguisusebowon(東醫壽世保元), focusing on their composition. 2. We analyzed the composition of formulas on Dongeuibogam(東醫寶鑑) comparing with 24 formulas for So-Eum type, 17 formulas for So-Yang type, 24 formulas for Tae-Eum type, 2 formulas for Tae-Yang type. Results & Conclusions : 1. We finally selected 14 formulas and its effect as similar formulas with Bojungyikgi-tang, Insamjinpi-tang, Cheongunggyeji-tang, Palmulgunja-tang, Hwanggigyejibuja-tang, Hwanggigyeji-tang for So-Eum type. 2. We finally selected 4 formulas and its effect as similar formulas with Dokwaljihwang-tang, Sukjihwanggosam-tang for So-Yang type.

• Journal of the Korean Ceramic Society
• /
• 제55권5호
• /
• pp.510-514
• /
• 2018

Colloidal semiconductor quantum dots (QDs), because of the novel optical and electrical properties that stem from their three-dimensional confinement, have attracted great interest for their potential applications in such fields as bio-imaging, display, and opto-electronics. However, many semiconductors that can be exploited for QD applications contain toxic elements. Herein, we synthesized non-toxic ZnTe/ZnSe (core/shell) type-II QDs by pyrolysis method. Because of the unique type-II character of these QDs, their emission can range over an extended wavelength regime, showing photoluminescence (PL) from 450 nm to 580 nm. By optimizing the ZnSe shell growth condition, resulting ZnTe/ZnSe type-II QDs shows PL quantum yield up to ~ 25% with 35 nm PL bandwidth. Using a simple two step cation exchange reaction, we also fabricated ZnTe/ZnSe type-II QDs with absorption extended over the whole visible region. The visible-light sensitized heavy metal free ZnTe/ZnSe type-II QDs can be relevant for opto-electronic applications such as displays, light emitting diodes, and bio-imaging probes.

• Communications of the Korean Mathematical Society
• /
• 제35권1호
• /
• pp.161-184
• /
• 2020

In this article, we establish some new weighted Hardy-type inequalities involving some variants of extended Riemann-Liouville fractional derivative operators, using convex and increasing functions. As special cases of the main results, we obtain the results of [18,19]. We also prove the boundedness of the k-fractional integral operator on L_p[a, b].

• The Journal of the Acoustical Society of Korea
• /
• 제11권1호
• /
• pp.67-79
• /
• 1992

For effective on-line ARMA parameter estimation, a covariance type ARMA fast transversal filter (FTF) algorithm is presented. The proposed algorithm is a covariance type implementation of ELS(Extended Least Squares) estimator and it is a fast time update recursion which is based on the fact that the correlation matrix of ARMA model satisfies the shift invariance property in each sub-block. The geometric approach is used in the derivation of the proposed algorithm. It takes small computational burden of 13N+37 MADPR(Multiplication And Division Per Recursion). Also, AR and MA orders can be independetly and arbitrarily specified.