• 한국작물학회지
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• 제49권6호
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• pp.552-562
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• 2004

KISTI는 학회업무 및 학술정보 관리를 학회가 어려움 없이 처리하도록 지원하고자, 학회 학술정보 유통체제 전 과정을 온라인 화하고 쉽게 관리할 수 있도록 한 ${\ulcorner}$KITTI­ACOMS (KISTI-Article COntribution Management System: KISTI-학회논문투고관리시스템)${\lrcorner}$을 개발하여 2001년부터 학회에 무상으로 보급하여 왔다. 최근 KISTI-ACOMS를 이용하고자 하는 학회의 요청이 더욱 확대되고 있어, KISTI는 많은 학회의 특성들을 의견수렴 하여, KISTI-ACOMS의 표준화를 목표로 보완해 나가고 있다. 본 연구논문의 구성은 다음과 같다. 1. KISTI-ACOMS 개요 설명. 2. KISTI-ACOMS를 기반으로 구축한 한국작물학회의 학회 논문투고관리시스템의 모듈별 기능 및 사용자 접근 권한에 따른 논문투고 심사 단계별 처리 방법 기술. 3. 향후 시스템에 필요한 기능 및 명세를 기술함으로써 한국작물학회 뿐만 아니라 KISTI-ACOMS를 기반으로 한 개선 된 온라인논문투고관리시스템을 제시.

• 대한한방내과학회지
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• 제21권3호
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• pp.389-398
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• 2000

The fallowing are the results of the experimental studies of Cordyceps militaris (CM) on the penile nitric oxide synthase (NOS) activity and the level of blood testosterone in hydrocortisone acetate-treated rats. CM was tested for the effects on activity of xanthine oxidase and lipid peroxidation in penis of hydrocortisone acetate-treated rats. In vitro, CM didn't effect the levels of lipid peroxide and the activity of NOS. In the penis of hydrocortisone acetate-treated rats, lipid peroxide, the activities and ratio of type conversion of xanthine oxidase were increased but activity of NOS and content of nitrite were decreased. In vivo, after administration of CM to hydrocortisone acetate-treated rats, levels of lipid peroxide in penis was decreased. Also, the activities and ratio of type conversion of xanthine oxidase were decreased, too. The body weight and concentration of testosterone in the blood were increased. The effects of Cordyceps militalis Broth did better than the effects of Cordyceps militalls Mycelia, These results suggest that CM decrease the activities of free radical generating enzymes such as xanthine oxidase which form lipid peroxide and increase the penile NOS activity and the level of blood testosterone in hydrocortisone acetate-treated rats. Conclusively, CM is capable of improving of sexual ability in hydrocortisone acetate-treated rats.

• 한국소음진동공학회논문집
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• 제24권8호
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• pp.583-591
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• 2014

The mathematical modeling on the free vibration and stability of a multi-stepped shaft of turbo compressor is performed in this study. The multi-stepped shaft is modeled as a non-uniform Timoshenko beam supported by anisotropic bearings. It is assumed that the shaft is spinning with constant speed about its longitudinal axis and subjected to a conservative axial force induced by front and rear impellers attached to the shaft. The structural model incorporates non-classical features such as transverse shear and rotary inertia. A structural coupling between vertical and lateral motions is induced by Coriolis acceleration terms. The governing equations are derived via Hamilton's variational principle and the equations are transformed to the standard form of an eigenvalue problem. The implications of combined gyroscopic effect, conservative axial force, bearing stiffness and damping are revealed and a number of pertinent conclusions are outlined. In this study analytical results are compared with those from ANSYS finite element analysis and experimental modal testing.

• Journal of Plant Biotechnology
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• 제2권2호
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• pp.55-60
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• 2000

Experiments initiated 30 years ago to obtain selectable markers have led to a series of studies of Trp biosynthesis and anthranilate synthase (AS) the control enzyme using largely plant tissue cultures since they have experimental properties that can be readily exploited. Enzymological and compound feeding studies provided evidence that AS is the control point in the Trp biosynthesis branch and that altering the AS feedback control by the selection of mutants resistant to the Trp analog 5-methyl-tryptophan (5MT) can lead to the overproduction of this important amino acid. Plants regenerated from these Trp overproducing lines of most species also had high free Trp levels but Nicotiana tabaum (tobacco) plants expressed the feedback altered AS only in cultured cells and not in the regenerated plants. further tests by transient and stable expression of the cloned promoter for the naturally occurring tobacco feedback-insensitive AS, denoted ASA2, confirmed the tissue culture specific nature of the expression control. The 5MT caused by the expression of a feedback-insensitive AS from tobacco has been used to select protoplast fusion hybrids with several species since the resistance is expressed dominantly. Recently the ASA2 gene has been used successfully as a selectable marker to select transformed Astragalus sinicus and Glycine max hairy roots induced by Agrobactetium rhizogenes. These results show that the ASA2y-subunit can interact with the y-subunit of another species to form active feedback-insensitive enzyme that may be useful for selecting transformed cells. Plastid DNA transformation of tobacco has also effectively expressed ASA2 in the compartment in which Trp biosynthesis is localized in the cell.

• 한국강구조학회 논문집
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• 제10권4호통권37호
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• pp.691-700
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• 1998

본 연구에서는 역대칭 또는 비대칭 적층쉘에 대한 Von Karman-Donnell 운동방정식을 기초로 한 다중 모드 접근법을 이용하여 양단이 단순지지 되고 다른 임의지지가 단순 또는 고정지지인 원통 쉘의 비선형 거동에 대해 연구하였다. 방정식은 모든 경계조건에 대해 만족하며, 변위함수는 최저 진동모드와 원주 방향의 변위의 연속성 조건을 만족하는 것으로 한다 비선형 진동 방정식은 Galerkin 법을 이용하여 유도하였고, 비선형 진동수는 조화평균법을 이용하여 적층 매개변수, 재료 상수, 종횡비 및 진동 진폭의 함수로서 표시하였다. 초기 진폭의 영향에 대해서는 4가지 형태의 경계조건에 대한 비선형 진동 결과를 비교 검토하였다.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2005년도 International Meeting of the Microbiological Society of Korea
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• pp.159-161
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• 2005

Hypovirus infection of the chestnut blight fungus Cryphonectria parasitica is a useful model system to study the hypoviral regulation of fungal gene expression. The hypovirus is known to downregulate the fungal laccase1 (lac 1), the modulation of which is tightly governed by the inositol triphosphate ($IP_3$) and calcium second messenger system in a virus-free strain. We cloned the gene cplc1 encoding a phosphatidyl inositol-specific phospholipase C (PLC), in order to better characterize the fungal gene regulation by hypovirus. Sequence analysis of the cplc1 gene indicated that the protein product contained both the X and Y domains, which are the two conserved regions found in all known PLCs, with a 133 amino acid extension between the 2nd ${\beta}$-strand and the ${\alpha}$-helix in the X domain. In addition, the gene organization appeared to be highly similar to that of a ${\delta}$ type PLC. Disruption of the cplc1 gene resulted in slow growth and produced colonies characterized by little aerial mycelia and deep orange in color. In addition, down regulation of lac1 expression was observed. However, temperature sensitivity, osmosensitivity, virulence, and other hypovirulence-associated characteristics did not differ from the wild-type strain. Functional complementation of the cplc1-null mutant with the PLC1 gene from Saccharomyces cerevisiae restored lac1 expression, which suggests that the cloned gene encodes PLC activity. The present study indicates that the cplc1 gene is required for appropriate mycelial growth, and that it regulates the lac1 expression, which is also modulated by the hypovirus. Although several PLC genes have been identified in various simple eukaryotic organisms, the deletion analysis of the cplc1 gene in this study appears to be the first report on the functional analysis of PLC in filamentous fungi.

• Macromolecular Research
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• 제12권2호
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• pp.172-177
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• 2004

We have studied the lamella-level morphology of poly(ethylene terephthalate) (PET)/polycarbonate (PC) blends using small-angle X-ray scattering (SAXS). Measurements were made as a function of the holding time in the melt. We determined the morphological parameters at the lamellar level by correlation function analysis of the SAXS data. An increased amorphous layer thickness was identified in the blend, indicating that some PC was incorporated into the interlamellar regions of PET during crystallization. The blend also exhibits a larger lamella crystalline thickness (l$\sub$c/) than that of pure PET. A possible reason for the increase in l$\sub$c/ is that the inclusion of the PC molecules in the interlamellar regions causes an increase in the surface free energy of folding. At the early stage of isothermal crystallization, we observed a rapid drop in the value of l$\sub$c/ in the blend; this finding indicates that a relatively large fraction of secondary crystals form during the primary crystallization. In contrast, the value of l$\sub$c/ for the sample that underwent a prolonged holding time increased with time in the secondary crystallization-dominant regime; this observation suggests that the disruption of chain periodicity, which results from transesterification between the two polymers, favors the development of fringed micellar crystals that have larger values of l$\sub$c/ rather than the development of normal chain-folded crystals.

• 한국전자파학회논문지
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• 제18권11호
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• pp.1291-1298
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• 2007

종래의 DGS를 이용한 초고주파 회로의 메탈 패키징(metal packaging)시 존재했던 DGS의 접지면 접촉 문제를 해결하고자, 본 논문에서는 이중 기판 결함 접지 구조 구조를 제안하고, 이를 1:4 비대칭 전력 분배기에 적용한 응용예를 제시한다. 이중 기판에 구현된 사각형 DGS는 종래와 같이 마이크로스트립 선로의 특성 임피던스를 표준형 선로보다 크게 증가시킨다. 이중 기판 DGS 구조를 형성하기 위하여 제2유전체 기판이 DGS가 구현된 기판면의 바닥 접지면에 접합된다. 따라서 제2유전체 기판이 메탈 패키지 바닥면에 장착되므로, DGS가 직접 패키지 접촉되는 것을 막을 수 있다. 초고주파 회로 응용예를 보이기 위해, 이중 기판 DGS를 이용하여 패키지 접지 문제를 해결한 1:4 비대칭 전력 분배기의 설계 및 측정 결과가 제시되는데, 시뮬레이션과 측정 결과에 있어서 잘 일치하는 특성을 보인다.

• 지역사회간호학회지
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• 제14권2호
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• pp.287-298
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• 2003

The purpose of the study was to develop an integrated prevention program to strengthen elders self-care capability and to examine its effectiveness on their psychological condition. This study used one group pre- and post-test design. Subjects were 85 elderly residents (over 65 years of age) who lived alone, and received free basic medical care and social welfare services in a rural community in Korea. Subject eligibility criteria for this study were to an elders who 1) is not currently taking any anti-depressant medication 2) is able to communicate, and 3) agrees to participate in this study. The integrated program was composed of horticulture, reminiscence, and friendship activities. Twelve sessions were provided for 12 weeks in community-based partnerships to achieve better outcomes. The intervention was case-managed by a public health nurse and aided by six volunteers. The main outcome variable was depression, which was assessed by using 15 items selected from the Geriatric Depression Scale-short form Korean version. Socio-demographic characteristics, functional status, and satisfaction with social support were used as covariates. Results showed that there was a significant intervention effect at post-intervention time point compared to pre-intervention time point(E.S. 0.94). Multiple linear regression analysis showed significant interaction effects between intervention and satisfaction with social support. These findings must be interpreted within the context that an effects of an integrated program could be more synergistically increased when social support factor is considered in the program. A community-based integrated prevention program of depression is effective for vulnerable rural elderly. It is suggested that randomized controlled trials within community setting for better methodological strength as well as multi-level outcomes on community need to be conducted in future.

• 한국한의학연구원논문집
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• 제16권3호
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• pp.77-84
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• 2010

In this study, YakMyeongSi were considered to define relations of Tradional Korean Medicine(TKM) and literature. In the introduction, present related studies were searched to clarify YakMyeongSi are completely different from medical property songs(YakSeongGa). Related data about YakMyeongSi and YakSeongGa were extracted for the initial findings. In chapter 2, medical name verse was defined as 'a type of free verses with one or more medical names in each verse to be interpreted ordinarily' based on records and examples of YakMyeongSi. In China, it originated from "Book of Odes" and "Songs of Chu", and it was most popular in the Song-China. Medical names actually referred to medical names in the early forms of the Warring States Period, but the complete form of YakMyeongSi started to appear in the Tang-China. In chapter 3, 34 YakMyeongSi and 5 related data were suggested in tables as the present conditions of Korean YakMyeongSi. With actual examples, better comprehension of YakMyeongSi were intended. Also, the fact that Korean YakMyeongSi were completed in forms at the end of Goryeo and beginning of Joseon dynasty. The motivations of writing YakMyeongSi were also studied. Medical names were put into verses because they well expressed landscapes and emotions. Propagation of medical knowledge was the basis of YakMyeongSi. There are limits in defining the relations of TKM and literature with some YakMyeongSi. More studies must be carried out on YakMyeongSi in various records with details and interests. Also, study to define general relations of TKM and literature must be carried out together by examining TKM in literary forms such as medical introductions or medical property songs and literature pieces that expressed principles and materials of TKM.