• 한국콘텐츠학회논문지
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• 제16권3호
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• pp.366-375
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• 2016

본 연구는 34개 OECD 국가 중에서 자료의 가용성에 따라 24개국을 대상으로 모의변수를 설정한 고정효과모형에 의한 패널분석을 수행하여 외국인 근로자의 국내 소득증대 효과를 분석하였다. 즉, 패널자료를 활용한 단순 및 다중회귀분석을 통해 총고용률, 자국인 고용률 및 외국인 고용률이 소득지표인 국내총생산과 일인당 국민소득에 미치는 영향을 분석하였다. 분석결과에 의하면 외국인 고용률이 내국인 고용률에 비해 소득증대에 기여하는 정도가 현저하게 낮은 것으로 나타났고, 외국인 고용률이 자국인 고용률을 대체하는 것으로 분석되었다. 그리고 노동이 국가의 소득수준을 결정하는데 있어서 영향력이 크다는 것도 입증되었다. 따라서 외국인 근로자의 유입으로 인해 노동생산성이 하향 조정되거나 노동시장이 분절화 되는 것을 방지할 수 있는 정책적 대안이 필요할 것이다. 즉, 노동정책 당국은 외국인 근로자의 양적인 확대뿐만 아니라 질적인 확대를 유도할 수 있는 방향으로 노동시장을 개방해야 할 것이다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2001년도 The 8th International Symposium
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• pp.20-33
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• 2001

A major portion of drugs used in Ayurvedic system of medicine which has been practiced since the early human civilization in Indian subcontinent were of plant origin. It should be noted that 70% of the population in this region depends on Ayurveda for their medical treatment and 60% of the drug resources are obtained from the Himalayan region. Therefore, Nepal becomes a potential source of plant drug resource since it occupies a major portion of the Himalaya. In the present paper, in general a current status of medicinal plant resources of Himalayan region especially Nepal will be discussed. In addition to this, a typical example of antidiabetic activity of Shilajit will be taken for the discussion. Shilajit is one of the crucial elements in several formulations including those of Rasayana, a therapy in Ayurveda, which has been practiced in the prevention of ageing and mental disorder. Although, Shilaiit is widely used for the treatment of diabetes, no satisfactory scientific reports are available up to now. The crude Shilajit in the market is a dark brown or black rock-like substance collected from the Himalayan region with a strong smell of cow's stale urine. In our studies, Shilajit (collected in the central Himalayan region) prevented the diabetes in nonobese diabetic (NOD) mice model. Shilajit also prevented the diabetes in the rats against the action of multiple low-dose (10 ㎎/㎏, i.v., 5 times) of streptozotocin. On the other hand, Shilajit did not show antioxidative activity. The preventive action of Shilajit on diabetes is mainly focused on the Th1 and Th2 cell activities, since Th2 cells activity was found to be significantly upregulated. Shilajit, however, showed a mild action in controlling the blood sugar level in young, old, and mild diabetic rats, but not in the severe diabetic rats. It also stimulated the nitric oxide production in macrophages. Based on these evidences, the antidiabetic activities of Shilajit appear to be immunomodulative probably by protecting or strengthening insulin-producing b-cells In the pancreas. further systematic research on constituents of Shilajit and its quality evaluation is necessary to enable the use of natural medicines in the treatment of diabetes.

• 산경연구논집
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• 제10권7호
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• pp.83-89
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• 2019

Purpose - It is a very important issue for the Korean tourism industry to increase tourism revenue by attracting foreign tourists. Although Japanese tourists have been an important part of the Korean tourism industry for a long time, the level of tourist satisfaction including accommodation has been at the worst compared to other foreign visitors, which strongly requires concrete solutions. Therefore, this study focuses on improving the satisfaction level of Japanese visitors in the use of accommodation, and find out the influence of the managerial response. Research design, data, and methodology - In this study, customer review and managerial response of hotels in Seoul were collected from "Rakuten Travel" which is the most representative online travel agency in Japan. As a result of collecting data from 2016 to 2018, 6,190 customer reviews and 1,241 managerial responses from 120 hotels were used for analysis. In addition, information on the properties of 120 hotels, such as the number of rooms, classification, types of hotel facilities, types of room facilities, accessibility and prices, were collected. To test the hypotheses, moderated multiple regression analysis was conducted with SPSS 22.0. Results - It was found that only 25 sites, 20.8% of the total 120 sites, were implementing managerial response and average response rate was 66.42% among them. As a result of examining the main effects of the hotel attributes on the ratings, accessibility and price are confirmed as effective variables. We also found that the response rate has a significant moderate effect in both the accessibility and price. In other words, there was a significant difference in the influence of accessibility and price on the ratings depending on the response rate. Also, it was confirmed that the response rate is not a pure moderator variable but a quasi moderator variable. Overall, the evidences partially supported the hypothesis. Conclusion - It was possible to provide important suggestions to the hotel managers who were concerned about managing tourist satisfaction with accessibility problems. It was found that the accessibility problem could be overcome by increasing the response rate. It was also confirmed that high ratings can be more effectively achieved for high priced hotels by increasing the response rate.

• 한국HCI학회논문지
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• 제7권2호
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• pp.17-24
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• 2012

본 연구에서는 오픈 소스와 소셜 컴퓨팅의 결합인 소셜 코딩 플랫폼의 대표적인 사이트 Github(http://github.com)를 대상으로 소셜 컴퓨팅 요소들이 프로젝트 결과물에 어떠한 영향을 미치는지 알아보고자 하였다. 소셜 컴퓨팅 요소의 적용 및 효과에 대한 논의는 갈수록 활발해지는 추세이나, 오픈 소스와 같이 대표적인 온라인 협업 공간에 소셜 컴퓨팅 요소를 적용하였을 때 그것이 협업 성과에 어떤 영향을 미칠 것인지에 대한 연구는 아직 미흡한 실정이다. 보다 세부적인 연구 질문은 다음과 같다: 1) 소셜 코딩 플랫폼의 시스템 요소들은 기능적으로 어떻게 구부할 수 있는가? 2) 실제 프로젝트의 결과물과 시스템 요소 이용 간에는 어떠한 관계가 있는가? 이에 답하기 위해 본 연구에서는 정성 및 정량적 분석을 수행하였다. 정성적 분석으로는 Github 이용자들의 인터뷰 결과에 기반하여 Github에서 제공하는 시스템 요소들을 기본적인 기능에 따라 분류하였고, 정량적 분석으로는 시스템 요소들과 프로젝트 결과물 간의 관계를 파악하기 위해 2,034개 프로젝트 샘플을 대상으로 다중 회귀 분석을 실시하였다. 결론적으로, 외부 연결 시스템 요소들이 프로젝트들의 코드에 큰 영향을 미친다는 사실을 발견하였다. 마지막으로는 본 연구의 결과에 기반한 함의를 제시하였다.

• 대한지리학회지
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• 제50권6호
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• pp.641-657
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• 2015

오늘날 대학, 기업, 공공연구기관 사이의 연구협력은 과학 기반 기술 혁신과 연관되어 주요 정책 현안이 되고 있다. 본 연구는 지난 10년(2002~2012) 동안 7개의 과학 기반 기술에서의 한국인 과학자와 연구자들이 참여하여 세계의 주요 과학 저널에 발행된 공동저술 논문을 조사하여 연구협력의 공간적 패턴을 탐구한다. 공동 저자의 소속 기관과 그 위치 정보를 제공하는 공동저술 논문을 연구협력의 지표로 이용하여 국내와 국제적 스케일에서 여러 형태의 협력 패턴과 추세를 기술하였다. 지난 10년 동안 공저 논문의 수와 참여 공저자의 수가 크게 증가하면서 과학적 연구협력이 공간적으로 분산하는 증거가 뚜렷이 확인되었다. 국내 연구협력의 분산 추세에도 불구하고 지식 흐름이 혁신 중심 지역에 편향되며, 지역 내에서 과학적 지식 생산이 국지화하는 증거도 발견되었다.

• Journal of Information Technology Applications and Management
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• 제25권2호
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• pp.53-72
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• 2018

This empirical study explored characteristics that affect the usefulness of online reviews, in the China e-commerce platform, and implemented multiple regressions to find factors that significantly influence on product sales, ultimately. Till now, prior studies have continuously revealed what factor affects usefulness of online review or product sales, only in respective terms. The point of our study is that we built two-level regression models, thereby being able to comprehensively analyze these two different targets. Before plunging into running regressions, we carefully collected 192,764 online review data for 200 products extracted from the Jingdong, the second biggest e-commerce platform in China. Also, we gathered "review sentimental scores" variable from each review and used that one as a core variable in our regression model, thus we were able to implement both quantitative and qualitative research. The evidences from the two-level regression models showed that the extent to which a product is experience good positively affects both usefulness of a review and product sales, again the usefulness of a review contributes to product sales in sequence. Also, the property of experience good has interaction effect on both for two-level regression models. Our main findings highlight the importance of role of online review to business performance of e-commerce firms.

• 한국콘텐츠학회논문지
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• 제8권2호
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• pp.41-47
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• 2008

학술 정보에서 저자는, 실세계의 한 저자가 형태적으로 둘 이상의 저자명으로 출현할 수 있으며, 서로 다른 저자들이 동일한 저자명을 공유하기도 한다. 이는 각각 학술 정보에 대한 검색 및 탐색에 있어, 재현율과 정확률을 저하시키는 요인이다. 이 연구에서는 후자에 해당하는 저자의 동명이인 문제에 있어, 그 중의성 해소를 위한 자질의 특성에 집중하고자 한다. 최근까지, 저자 식별을 위한 자질로, 공저자, 논문 제목, 게재지명과 같은 서지 내적 자질과, 논문 원문 텍스트로부터 획득되는 전자메일주소, 소속기관, 논문의 토픽 등과 같은 서지 외적 자질이 사용되어 왔다. 그러나, 이러한 자질들이 저자 식별에 미치는 영향에 대한 비교 분석 연구는 찾아 보기 힘들다. 이 연구에서는, 한글 저자명에 대해 원문과 연계된 대용량 저자 식별 평가 셋을 구축하여, 동명 저자 중의성 해소에 있어 다양한 자질들의 특성을 비교한다.

• Annals of Clinical Neurophysiology
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• 제3권2호
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• pp.128-135
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• 2001

Background : Tremor is uncommon manifestation of stroke. Therefore a few cases have been reported until now. There is still uncertainty about the characteristics of post-stroke tremor. Furthermore the pathogenesis and responsible structures of post-stroke tremor are not precisely known. We have recently experienced 34 cases of post-stroke tremor for the past 6 years. We analysed the clinical features and electrophysiologic findings of post-stroke tremor to evaluate the general characteristics and to analogize the possible pathogenetic mechanisms of post-stroke tremor. Methods : The clinical characteristics of post-stroke tremor were summarized in according to the onset time, involved body parts, types, tremor frequencies, neuroradiologic findings, and associated symptoms. The tremor frequencies were recorded by using a gyroscope. The spectral analysis of tremor frequencies were done automatically with Motus I soft ware. Results : Tremor onset were remarkably varied. Some patients showed a tremor appearing at the onset of a stroke and other patients showed delayed-onset tremor 10 years after a stroke. Tremor frequencies were also much varied. The range of hand tremor frequencies were from 1.5 to 12 Hz. Lesions were found in 31 cases(infarction 27, hemorrhage 4) on neuroimaging. In the cases of cerebral infarctions, 7 cases showed multiple small vessel diseases and 20 cases showed cerebral vessel lesions. The most commonly involved cerebral vessel lesion was the middle cerebral artery territory Several different clinical patterns of post-stroke tremor were identified. Conclusions : There are some evidences from the data summarized here to suggest that several pathogenetic mechanisms including central oscillators could be involved for the development of tremors and that tremor generating neural circuits could be more complex than previously suggested neural circuits.

• 한국학교보건학회지
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• 제18권1호
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• pp.15-25
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• 2005

Purpose: Recently there are scientific evidences for the health effects of Asian dust-storms. Particularly in 2002, the daily average of $PM_10$ exceeded 600 and 700 $\mu{g}/m^3$ in March and April respectively. We examined the effects of Asian dust‐storms on perceived symptoms and preventive behaviors among children, adults, and elders. Method: The subjects of this study were 425 children, 444 adults and 60 elders. A questionnaire survey was carried out on the children and the adults by teachers and on the elders by interviewers to obtain information on demographic variables, perceived symptoms and preventive behaviors, previous respiratory disease, environmental tobacco smoke, and proximity between the house and the road during Asian dust-storms. We analyzed using descriptive statistics, $X^2$ test and multiple logistic regression models. After adjustment for potential confounders, we estimated the odds ratios and 95% confidence intervals of the children and the elders for perceived symptoms and preventive behaviors. Result: The elders had a significantly higher prevalence of respiratory symptoms than the other groups. The children had a significantly higher prevalence than the adults in getting URI (1.51), coughing (1.68), rhinorrhea (1.46), fever (2.39) and medication for allergy or asthma (1.90). The children had better behaviors than the elders in closing windows (3.57), taking less outdoor recreational activity (2.59) and staying home (2.60). Conclusion: This study suggested that children and elders are susceptible to the effects of Asian dust on health. Health educators should inform these populations about the influence of Asian dust and provide health education for preventive behaviors.

• Safety and Health at Work
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• 제13권3호
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• pp.269-278
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• 2022

Background: PTSD (Post-traumatic stress disorder, PTSD) had a great impact on health care workers during the COVID-19 (Corona Virus Disease 2019, COVID-19). Better knowledge of the prevalence of PTSD and its risk factors is a major public health problem. This study was conducted to assess the prevalence and important risk factors of PTSD among medical staff during the COVID-19. Methods: The databases were searched for studies published during the COVID-19, and a PRISMA (preferred reporting items for systematic review and meta-analysis) compliant systematic review (PROSPERO-CRD 42021278970) was carried out to identify articles from multiple databases reporting the prevalence of PTSD outcomes among medical staff. Proportion random effect analysis, I² statistic, quality assessment, subgroup analysis, and sensitivity analysis were carried out. Results: A total of 28 cross-sectional studies and the PTSD results of doctors and nurses were summarized from 14 and 27 studies: the prevalences were 31% (95% CI [confidence interval, CI]: 21%-40%) and 38% (95% CI: 30%-45%) in doctors and nurses, respectively. The results also showed seven risks (p < 0.05): long working hours, isolation wards, COVID-19 symptoms, nurses, women, fear of infection, and pre-existing mental illness. Two factors were of borderline significance: higher professional titles and married. Conclusion: Health care workers have a higher prevalence of PTSD during COVID-19. Health departments should provide targeted preventive measures for medical staff away from PTSD.