• Journal of Astronomy and Space Sciences
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• 제27권2호
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• pp.89-96
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• 2010

BVR CCD observations of GW Cep were made on 15 nights in November through December 2008 with a 1-m reflector at the Jincheon station of the Chungbuk National University Observatory. Nineteen new times of minimum lights for GW Cep were determined and added to a collection of all other times of minima available to us. These data were then intensively analyzed, by reference to an O-C diagram, to deduce the general form of period variation for GW Cep. It was found that the O-C diagram could be interpreted as presenting two different forms of period change: an exclusively quasi-sinusoidal change with a period of 32.6 years and an eccentricity of 0.10; and a quasi-sinusoidal change with a period of 46.2 years and an eccentricity of 0.36 superposed on an upward parabola. Although a final conclusion is somewhat premature at present, the latter seems more plausible because late-type contact binaries allow an inter-exchange of both energy and mass between the component stars. The quasi-sinusoidal characteristics were interpreted in terms of a light-time effect due to an unseen tertiary component. The minimum masses of the tertiary component for both cases were calculated to be nearly the same as the $0.23-0.26M\;{\odot}$-ranges which is hardly detectable in a light curve synthesis. The upward parabolic O-C diagram corresponding to a secular period increase of about $4.12{\times}10^{-8}\;d/yr$ was interpreted as mass being transferred from the lesser to more massive component. The transfer rate for a conservative case was calculated to be about $2.66\;{\times}\;10^{-8}\;M_{\odot}/yr$ which is compatible with other W UMa-type contact binaries.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제14권6호
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• pp.567-581
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• 2008

웹의 크기가 폭발적으로 증가함에 따라 인터넷에서 정보를 얻는 수단으로서 검색 엔진의 중요성이 부각되고 있다. 검색 엔진은 사용자에게 최신의 정보를 검색 결과로서 제공하기 위해 웹 페이지를 주기적으로 수집하고 이를 데이타베이스에 저장한다. 웹 크롤러는 이러한 목적으로 웹 페이지를 수집하는 프로그램이다. 대부분의 검색 엔진은 제한된 시간 내에 많은 수의 웹 페이지를 수집하기 위해 다수의 머신을 사용하는 병렬 웹 크롤러를 이용한다. 그러나, 병렬 웹 크롤러의 아키텍처와 세부 구현 방법이 잘 알려져 있지 않기 때문에 실제로 병렬 웹 크롤러를 구현하는 데에 어려움이 많다. 본 논문에서는 병렬 웹 크롤러(parallel web crawler)의 아키텍처와 세부 구현 방법을 제시한다. 병렬 웹 크롤러는 다수의 머신에서 웹 페이지를 병렬적으로 수집하기 위해 조정자(coordinator) 대리자(agent) 구조의 2-티어(tier) 모델을 사용한다. 조정자/대리자 모델은 각 머신에서 웹 페이지를 수집하기 위한 다수의 대리자들과 이 대리자들을 관리하기 위한 하나의 조정자로 구성된다. 병렬 웹 크롤러는 웹 페이지를 수집하기 위한 크롤링(crawling) 모듈, 수집한 웹 페이지를 데이타베이스 로딩 포맷으로 변환하기 위한 컨버팅(converting) 모듈, 수집된 웹 페이지의 중요도를 계산하기 위한 랭킹(ranking) 모듈로 구성된다. 본 논문에서는 병렬 웹 크롤러의 각 모듈들을 설명하고, 세부 구현 방법을 설명한다. 마지막으로, 실험을 통해 병렬 웹 크롤러의 성능을 평가하였다. 실험 결과, 제안된 병렬, 웹 크롤러가 수집해야할 웹 페이지 개수와 머신 개수에 따라 확장 가능함을 보였다.

• 유통과학연구
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• 제12권10호
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• pp.85-97
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• 2014

Purpose - This study aims to clarify through which process asset specificity and supplier development project (SDP) affect performance. Cooperation, partnership, the level of information exchange, and the importance of information sharing are considered significant variables as mediators related to the process. Finally, the performance formation model of the supply chain through asset specificity and supplier development project would be suggested as being a result of this study. Research design, data, and methodology - Data collection was as follows: questionnaires were distributed to 250 companies that have business ties with H Company. The empirical study to test our hypothesis was based on statistical analysis (using SPSS 19.0 and AMOS 19.0). The hypothesis of this paper is that the asset specificity and supplier development project variables have positive effects on the following variables: mediators such as cooperation and partnership (reliability and dependence); and the cooperation and partnership variables have a positive effect on the following variables: level of information sharing, the importance of information sharing, and level of information sharing; the importance of information sharing has a positive effect on supply chain performance. We tested our hypothesized model utilizing path analysis with latent variables. Results - First, it was found that asset specificity has significant positive effects on cooperation (H1), reliability (H2), and dependability (H3). Second, it was proved that the level of comprehension on the purpose of SDP has positive effects significantly on cooperation (H4), reliability (H5), and dependability (H6). Third, the hypotheses related to cooperation were all significantly accepted. The relationships of cooperation with the level (H7) and importance (H8) of information sharing were significant. Fourth, the hypotheses related to reliability were all significantly accepted. The relationships of reliability with the level (H9) and importance (H10) of information sharing were significant. In terms of dependability, however, the hypotheses were partially accepted. The effect of dependability was significant on the importance of information sharing (H12), but insignificant on the level of information sharing (H11). Finally, the causal relationships from the level of information sharing to SCM performance (H13) and from the importance of information sharing to SCM performance (H14) were both significantly accepted. Conclusion - First, with rapid changes in the business environment, enterprises should acquire the right information to properly implement SCM. For successful SCM, firms should understand the supplier development project. Second, asset specificity and the level of comprehension on SDP have significant effects both on cooperation and partnership (reliability and dependability). Third, mediators such as cooperation, reliability, and dependability significantly affect the level and importance of information sharing. Fourth, the level and importance of information sharing have significant impacts on SCM performance. This paper makes a meaningful contribution to further the understanding of how SDP affects SCM performance. Finally, successful SCM performance is achieved by information sharing through a collaborative environment and partnership (confidence & dependence) rather than by investing only in setting up an information system.

• 대한간호
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• 제36권4호
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• pp.61-74
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• 1997

This study is a descriptive study which was done to examine the circumstances surrounding burn accidents in children in order to develop a burn prevention program. The subjects for the study were the mothers of 107 children admitted to two burn specialty hospitals in seoul and the mothers of 172 healthy children attending day care or kindergarten. The tool used in the study was developed by the researchers, pretested and refined. Cronbach's alpha was 0.72. Data collection was done between November 1995 and April 1996. Statistically analysis was done using SAS Version 6.04 and the data was analyzed using test, chi square, regression and logistic analysis. A suumary of the results shows the following : Eighty percent of the children in both groups lived in nuclear families but comparatively more of the children with burn accidents lived in apartments. More of the parents in the group of healthy children had university education and held white collar or professional jobs, while the parents of the children with burn accidents were slightly younger than the parents of the healthy children. but not significantly younger. A significantly greater number of families of children with burn accidents had more than one child and the characteristics of the children with burn accidents that they were more frequently boys, either first or last born and very active. Most of the burn accidents occurred in fall or winter. sometime between noon and midnight and the majority occurred in the home and were caused by hot liquid. In 86% of the cases emergency care was not given at home but the child was brought to the hospital emergency unit. Most of the burns were second degree or greater. involved the arms or legs. required admission, and 41.5% occurred when the parents were preparing or eating meals. In a test of knowledge of preventive measures, the mothers of children who had suffered burn accidents scored slightly higher than the mothers who had no experience with burn accidents, but this was not statistically significant. As to what to do in the case of a fire, the mothers of the healthy children had more knowledge about who to notify. but 70% of the mothers in both groups did not know how to escape from the house if it was of fire. 80 to 96% did not know what do to in case of a fire, such as rolling if clothes were on fire. 80% did not know what emergency care to give for a burn, and 74 to 87% did not know when it is appropriate to try to put out a fire. It can be concluded from this study that. since the results show that the most frequent situation which resulted in burn accidents was when the parents were not aware of the danger of burns or were not paying attention to the child. and when there were no protective devices to prevent burns. and that accidents most frequently occurred at home. the most effective way of preventing accidents is to develop in the parents a "safety mind", Since burn accidents in children are usually more severe than in adults. the physical. emotional. psychological and social damage is greater. In order to develop and awareness of this in the general public. the use of mass media. books and pamphlets and other educational media that provide education on prevention of burn accidents need to be utilized.

• 대한간호
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• 제35권1호
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• pp.81-93
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• 1996

This descriptive study was done to identify the relationship between coping style and trait anxiety in patients undergoing cardiac catheterization. The subjects selected were 69 patients who were scheduled for cardiac catheterization in S hospital from , November 1st, 1994 to May 30th, 1995. Data collection was done using Spielberger's Trait Anxiety Scale, Bendig's Short Form of the Manifest Anxiety Scale, Crowne & Morlowe's Social Desirability Scale, Millers Behavioral Style Scale, Information Subscale of Krantz Health Opinion Survey and Visual Analog Scale about informaton seeking behavior. The summary of the findings is as follows : 1. No significant relationship was found between the general characteristics of age, sex, marital status, level of education and occupation, and the variables coping style and trait anxiety. 2. The mean of trait anxiety scores for the Spielberger Scale was 46.68. It is slightly above average. The subjects were classified as to personality type: truely low anxious 25 (36.2%), highly anxious 25 (36.2%), and repressing 16 (23.2%), using a combination of scores from the Bendig Short Form Anxiety Scale and the Crowne Marlowe Social Desirability Scales. 3. No significant relationship was found between Spielberger s trait anxiety and Bendig's personality type. 4. Each subject's preference for either monitor or blunter coping strategy was assessed via the Miller Behavioral Style Scale. The proportion of Monitors (47.8%) and Blunters (52.2%) among the subjects were similar. The means of preference for information measured on the Krantz's subscale and Visual Analog Scale were 4.18, 80.79 respectively. Because these scores appeared above average, subjects tended to be higher seeker an information rather than avoiding it. 5. There was no significant relationship between Miller's Behavioral Style and Spielberger's trait anxiety. 6. There was no significant relationships between Bendig's personality types. and the preference on information of Krantz's and Visual Analog Scale. and Miller's Behavioral Styles. But 56.0% of the subjects who were highly anxious used Monitor strategy for coping. Findings from the current study do not permit any relationship inferences between coping style and trait anxiety. Patients undergoing cardiac catheterization must receive interventions on stress reduction because the cardiac 'catheterization creats a situation of psychological stress. Therefore, the nursing intervention of providing information about cardiac catheterization have to be given based on each patient's coping style and on their trait anxiety.

• Journal of Korean Neurosurgical Society
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• 제29권6호
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• pp.786-793
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• 2000

Objectives : A clinical analysis was performed to provide management strategy and to improve management outcome of elderly patients with intracranial aneurysm. Patients and Methods : We reviewed medical records of 746 consecutive patients with intracranial aneurysm who were admitted from July 1991 to December 1996. They were divided into two age groups : elderly(120 patients aged 65 years or older) and non-elderly(626 patients aged 64 years or younger). We investigated the differences between the two groups in clinical characteristics, management outcome and surgical results. Results : Female(80.0%), internal carotid artery aneurysm(48.9%), poor clinical grade(Hunt and Hess Grade IV, V : 39.8%), postoperative subdural fluid collection(38.2%), and postoperative hydrocephalus(39.7%) were more frequent in the elderly patients. There were no significant differences in the incidence of hypertension, multiple aneurysm, unruptured aneurysm, rebleeding, delayed ischemic neurological deficits, postoperative hemorrhage, and low density on the postoperative brain CT scan. In some cases, surgical clipping of ruptured aneurysm could not be performed due to moribund state or refusal of surgery by the elderly patient's family. Both management outcome and surgical results in elderly aneurysm patients at 3 months after rupture were worse than those of the non-elderly group. The most common reason of unfavorable outcome was poor clinical grade in both groups, while serious medical illness causing unfavorable outcome was more common in the elderly group. Conclusion : Surgical treatment of a ruptured aneurysm should not be avoided in elderly patient solely on the basis of advanced age. If the patients are in good clinical grade, early aneurysm surgery followed by early ambulation should be recommended. Further improvements in outcome may be achieved by thorough knowledge of poor resilience of brain, CSF flow dynamics, and diminished cardiopulmonary reserve in elderly patients with intracranial aneurysm.

• 한국콘텐츠학회논문지
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• 제15권4호
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• pp.519-529
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• 2015

이 연구에서는 성공적인 성인기 준비를 위한 진로 및 직업교육 프로그램 개발의 기초자료를 제공하기 위해, 신체능력, 작업능력, 정서 행동 영역, 기능적 적응 행동 요인을 중심으로 직업훈련 프로그램에 참여한 청년기 지적장애인들의 고용 유지 결정 요인을 알아보았다. 이를 위해 직업훈련 프로그램에 참여한 64명의 청년기 지적장애인을 대상으로 평가를 실시하고, 프로그램 수료 이후 6개월 시점에의 추적 조사를 통해 고용 유지 여부를 알아보았다. 이분형 로지스틱 회귀분석을 통해 고용 유지 결정 요인을 알아본 결과, 신체능력 중 양손 기민성(OR = 2.175), 작업 능력 중 소도구 사용 손기민성(OR = 1.123), 정서 행동 영역 중 불안(OR = .733)과 사회화 영역(OR = .429), 기능적 적응행동 영역 중 학습기술(OR = 1.077)과 직업기술 영역(OR = 1.542)이 고용 유지 결정 요인으로 나타났다. 이 연구를 통해 드러난 고용 유지 결정요인은 선행연구들에서 제시한 고용 유지에 영향을 미치는 요인들과 일치하는 것으로 나타났다. 고용 유지에 효과적인 진로 및 직업교육 프로그램 구성을 위해서는 고용 유지에 유의한 영향을 미치는 요인들에 대한 고려가 필요할 것으로 생각된다.

• 한국산학기술학회논문지
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• 제19권4호
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• pp.454-462
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• 2018

본 연구의 목적은 대학생의 SNS중독경향성과 대인관계 만족도를 파악하고, 두 변수간의 상간관계를 파악하여, 대학생의 대인관계 향상 및 SNS 중독 예방을 위한 중재방안의 기초자료를 제공하기 위해 수행되었다. 본 연구의 대상은 D시와 K 지역 대학에 재학 중인 대학생 316명이며, 자료수집 기간은 2017년 6월 30일부터 7월 30일까지였다. 자료수집 방법은 온라인 설문을 이용하여 자가 보고식으로 수집하였고, 자료분석은 SPSS를 이용하여 기술통계, t-test, Pearson correlation coefficients로 분석하였다. 본 연구의 결과 SNS중독경향성과 대인관계만족도는 유의한 음의 상관관계(r=-.57, p<.01)를 보여주어 SNS중독경향성이 높을수록 대인관계 만족도가 낮아짐을 알 수 있었다. 성별(t=.05, p=.963), SNS인맥수(t=.66, p=.513), SNS에서만 유지하는 인맥정도(t=-1.24, p=.216)에 따른 SNS중독경향성의 유의한 차이는 없었다. SNS사용목적 중 정보수집을 위해 SNS이용하는 경우 대인관계 만족도가 더 높았지만(t=3.02, p=.030), SNS사용목적에 따른 SNS중독경향성의 유이한 차이는 없었다(t=0.39, p=.759). 따라서 대학생의 대인관계 만족도를 향상시키기 위한 중재 프로그램 개발 시 본 연구에서 규명된 자료를 기초로 하여 대학생의 SNS중독을 예방하고 대인관계를 향상시키는 프로그램에 활용될 수 있기를 기대한다.

• 박물관보존과학
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• 제17권
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• pp.69-84
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• 2016

유소는 족자를 걸기 위한 끈의 역할을 한다. 본 연구는 기존 어진과 공신도상의 유소 연구결과를 기반으로 사대부상의 유소에 초점을 맞추어 연구하였다. 조사대상은 국립중앙박물관 소장 초상화에 장착된 유소 7점으로 형태와 제작 재료에 관해 분석하였다. 그 결과 대부분 16사의 동다회로 6점은 홍색, 1점은 쪽색으로 제작되어 전형적인 사대부상 유소의 형태를 보이고 있었다. 분석 결과 윤급 초상(덕3503)은 종이에 금박을 입힌 것이며, 금 아래 적색 안료 입자는 Fe로, 산화철 계통의 안료인 석간주가 사용된 것으로 보인다. 신임 초상(덕수4846)은 속지의 주성분이 금으로 납, 수은, 은이 소량 확인되었고, 이성원 초상(본10122)은 주성분이 Ag로 은지인 것이 확인되었다. 이서구 초상(신1065)은 주성분이 Ag, Fe, Br이며 속지는 가죽으로 제작되었다. 가죽을 FTIR로 분석한 결과 지문 영역에서 양가죽의 스펙트럼과 거의 일치하고 있어, 양가죽을 가공한 피금(皮金)인 것으로 확인되었다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.73-73
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• 2018

Bacterial leaf blight(BLB), caused by X. oryzae pv. oryzae(Xoo), is one of the most destructive diseases of rice due to its high epidemic potential. Understanding BLB resistance at a genetic level is important to further improve the rice breeding that provides one of the best approaches to control BLB disease. In the present investigation, a collection of 192 accessions was used in the genome-wide association study (GWAS) for BLB resistance loci against four Korean races of Xoo that were represented by the prevailing BLB isolates under Xoo differential system. A total of 192 accessions of rice germplasm were selected on the basis of the bioassay using four isolated races of Xoo such as K1, K2, K3 and K3a. The selected accessions was used to prepare 384-plex genotyping by sequencing (GBS) libraries and Illumina HiSeq 2000 paired- end read was used for GBS sequencing. GWAS was conducted using T ASSEL 5.0. The T ASSEL program uses a mixed linear model (MLM). T he results of the bioassay using a selected set of 192 accessions showed that a large number of accessions (93.75%) were resistant to K1 race, while the least number of accessions (34.37%) resisted K3a race. For races K2 and K3, the resistant germplasm proportion remained between 66.67 to 70.83%. T he genotypic data produced SNP matrix for a total of 293,379 SNPs. After imputation the missing data was removed, which exhibited 34,724 SNPs for association analysis. GWAS results showed strong signals of association at a threshold of [-log10(P-value)] more than5 (K1 and K2) and more than4 (K3 and K3a) for nine of the 39 SNPs, which are plausible candidate loci of resistance genes. T hese SNP loci were positioned on rice chromosome 2, 9, and 11 for K1 and K2 races, whereas on chromosome 4, 6, 11, and 12 for K3 and K3a races. The significant loci detected have also been illustrated, NBS-LRR type disease resistance protein, SNARE domain containing protein, Histone deacetylase 19, NADP-dependent oxidoreductase, and other expressed and unknown proteins. Our results provide a better understanding of the distribution of genetic variation of BLB resistance to Korean pathogen races and breeding of resistant rice.