• Journal of Periodontal and Implant Science
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• 제43권1호
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• pp.12-17
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• 2013

The purpose of this review is to examine the performance of attachments used in implant-supported overdenture (IOD) in both clinical and in vitro settings and report the compiled findings, comparisons, and trends in the research literature. Articles published in PubMed on IOD attachment systems and performance were reviewed. Non-original articles were excluded. For each article included, the type of study, number of implants, number of attachment systems, and study outcome were recorded. Of the 283 articles found, 158 met the inclusion criteria. Ninety-four articles were clinical studies and 64 articles were in vitro studies. Studies on retention were the most common for in vitro studies, and four or more attachment systems were compared in most articles with significant differences in outcome. A clinical outcome of one attachment system was most common for clinical studies, while most studies had neutral outcomes overall. Ball attachment was the most commonly tested IOD attachment system. The trend in the literature showed that there is a large discrepancy between the study designs and outcomes between the clinical and the in vitro studies for IOD. Further clinical studies that can validate in vitro research should be encouraged to address this discrepancy between the two areas.

• Journal of Preventive Medicine and Public Health
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• 제29권3호
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• pp.429-437
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• 1996

The geographical distribution of active physicians who graduated from medical schools before 1985 were studied. Those who had emigrated, hold non-medical jobs, are in the military service, or work as public health physicians and resident staff were excluded from the study. A total of 27,728 physicians were analyzed. Our studies have shown a relationship between the location of the medical schools from the which the physicians have graduated and the geographical regions in which they practice. A statistically significant number of physicians are working near the medical colleges from which they have graduated. That is, those who had graduated from medical schools located in the southern area of the country are presently working in the same region. This relationship was shown to be especially significant for older physicians and female doctors, who work around the area of the medical colleges from which they graduated.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.306-309
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• 2004

The susceptibility of landslides and the effect of landslide-related factors at Penang in Malaysia using the Geographic Information System (GIS) and remote sensing data have been evaluated. Landslide locations were identified in the study area from interpretation of aerial photographs and from field surveys. Topographical and geological data and satellite images were collected, processed, and constructed into a spatial database using GIS and image processing. The factors chosen that influence landslide occurrence were: topographic slope, topographic aspect, topographic curvature and distance from drainage, all from the topographic database; lithology and distance from lineament, taken from the geologic database; land use from Landsat TM (Thermatic Mapper) satellite images; and the vegetation index value from SPOT HRV (High Resolution Visible) satellite images. Landslide hazardous areas were analysed and mapped using the landslide-occurrence factors employing the probability-frequency ratio method. To assess the effect of these factors, each factor was excluded from the analysis, and its effect verified using the landslide location data. As a result, land 'cover had relatively positive effects, and lithology had relatively negative effects on the landslide susceptibility maps in the study area. In addition, the landslide susceptibility maps using the all factors showed the relatively good results.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.594-597
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• 2004

The ground subsidence that occurred in an abandoned coal mining area, Gaeun, Korea, was observed by using 25 JERS-1 SAR interferograms from November 1992 to October 1998. We estimated the subsidence on a subset of image pixels corresponding to point-wise permanent scatters (PSs) by exploiting a long temporal series of interferometric phases. The results were compared it with a distribution map of in situ examined crack level. PSs were identified by means of amplitude dispersion index and coherence of the interferograms. The measured subsidence rate represented the average velocity in a period of image acquisition and excluded complex nonlinear displacements such as an abrupt collapse. The mean line-of-sight velocity in the study area is 0.19cm/yr and an r.m.s. error is 0.18cm/yr. The center of the abandoned Gaeun coal mine (0.49cm/yr) and the area near to the Gaeun station (1.66cm/yr) were observed as most rapidly subsiding areas.

• 무역상무연구
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• 제66권
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• pp.263-284
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• 2015

This study has analyzed the efficiency of 10 leading global shipping companies listed in the New York Stock Exchange from2010 to 2014 in order to find the changes of the productivity of shipping industry. The paper observed the Malmquist Productivity Index by using Efficiency and Productivity Analysis System Version 1.0. The data used in this study is the Guggenheim Shipping ETF mainly including the companies of shipping, management, and shipbuilding areas. The results from this statistical analysis indicate that the 10 selected companies have experienced a severely negative growth in 2010. Nevertheless, these companies have accomplished a significant growth of productivity. In particular, the energy transport companies operating Tanker and LNG ships carried out remarkable growth. The reason why the productivity of liner shipping companies did not show the improvement of productivity for five years was attributed to the fact that the P3(Project 3) or M2(Maersk-MSC) including Maersk, MSC, and CMA-CGM were excluded in this research because of the difficulty of attaining reliable source data. The method of this study could be extended to Korean shipping corporations and other global airlines to investigate a changes of certain industries.

• Animal Systematics, Evolution and Diversity
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• 제8권2호
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• pp.163-176
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• 1992

3종의 외국산 따개비가 한국의 조간대 해역에 침입한 것이 발견되었는데 이들은 Balanus amphitrite, B. eburneus 및 B. improvisus이다. 한국내에서 이 3종이 모두 발견되고 개체군이 가장 발달된 곳은 동남부 해역, 즉 부산 부근이다. B. amphitrite는 1970년도 초에 가장 먼저 한국에 침입한 것으로 추측되며 가장 널리 분포해 있으나 목포 이북의 서해에는 아직 침입해 있지 않은 상태이다. B. improvisus는 동해의 복쪽까지 확산해 있으나 B. eburneus는 동남부 해역에 국한되어 있다. B. amphitrite는 재래종인 B. albicostatus와 경쟁을 하고 있는데 이 두 종이 혼생하고 있는 여러 지역에서 후자의 재래종이 배타되고 있는 실정이다. 서해는 아직 외래 따개비의 침입을 받고 있지 않은데 그 이유는 현재 모르고 있다.

• 한국치위생학회지
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• 제19권3호
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• pp.409-419
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• 2019

Objectives: The purpose of this study was to analyze the factors affecting antibiotic prescription in dental outpatients. Methods: The present study was conducted using data from the National Health Insurance Service - National Sample Cohort. We analyzed prescriptions issued in the dental outpatient department in 2015, for adults over 19 years of age. Antibiotic prescription rates and mean prescription days were analyzed by sex, age, insurance type, presence of diabetes mellitus and hypertension, season in treatment, type of dental institution, and location of dental institution. Multivariate logistic regression was also performed to analyze the factors affecting antibiotic prescription in dental outpatients. Results: A total of 257,038 prescriptions were analyzed. The mean prescription days of antibiotics in dental outpatients were $3.04{\pm}1.08days$, and the prescription rate was 93.0%. Two variables (presence of diabetes mellitus and insurance type) were excluded from the multivariate logistic regression analysis model because they did not significantly affect antibiotic prescription. The possibility of antibiotic prescription was higher in men ${\geq}61years$ of age and those with hypertension. Furthermore, antibiotics were most frequently prescribed in dental clinics rather than dental hospitals, and more frequently in Busan compared to other areas (p<0.001). Conclusions: Several factors were determined to affect antibiotic prescription, and detailed guidelines for consistent antibiotic prescription are needed.

• International Journal of Advanced Culture Technology
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• 제9권2호
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• pp.47-55
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• 2021

The coronavirus disease 2019 (COVID-19) pandemic continuously influences on the health and well-being of people and communities worldwide. The purpose of this study was to explore the published research articles in the fields of nursing and health during the COVID-19 pandemic. The research design is an exploratory study. Samples are the abstracts of the articles from a literature database, PubMed, that were published from January 1st, 2020 to April 15th, 2021. We used a MeSH term, 'nursing' and "COVID-19" to retrieve articles that are related to COVID-19. Five hundred and fifty-five articles were retrieved. Two hundred and sixteen articles were excluded as they were not met the inclusion criteria. The total number of articles used in this study was three hundred and thirty-nine. The average number of articles published during the data collection period was 21.9. Seven topics were discovered from the abstracts of the articles: COVID-19 management and guidance; Perinatal COVID-19 and breastfeeding; Nurse; Health service and support; Patient care; Research; and Education and experience. This study revealed some interesting topics from the articles related to COVID-19 and provided some sense of research areas that may be interesting and allow us to develop important research questions about nursing science and nursing practice.

• 한국환경생태학회지
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• 제24권2호
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• pp.166-177
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• 2010

본 연구는 서울시 강동구 녹지축인 산림과 인접한 시가화지역 내 야생조류 출현에 영향을 미치는 요인을 분석하고자 하였다. 연구대상지 도시생태계 현황 분석결과 시가화 비오톱은 녹지율이 높은 공동주택지 비오톱과 녹지율이 낮은 주상혼합지 및 상업업무지 비오톱이 주요 유형이었고 녹지 및 오픈스페이스 비오톱은 배후녹지 비오톱이 대부분이었다. 분석공간단위는 비오톱 유형별 블록을 기준으로 하였다. 봄철에 출현한 야생조류는 총 51종 3,419개체, 겨울철에 출현한 야생조류는 총 35종 4,213개체이었고 분석대상종은 연구 목적을 고려하여 시가화지역에 출현한 31종 중 도심지에 적응한 종과 맹금류, 수변에 서식하는 종들을 제외한 총 24종을 선정하였다. 선정된 종들을 대상으로 각 공간단위별 봄철, 겨울철 야생조류 출현종 및 개체수를 분석하였다. 시가화지역 야생조류 출현과의 상관분석을 위해 분석 공간단위별 블록면적, 녹지율, 건폐율, 용적율 등 토지이용구조와 교목 아교목층 녹지용적, 관목층 녹지용적, 블록내 평균 녹지패치면적, 교목층 평균 수고 및 흉고직경 등 녹지구조를 산출하였으며 주요 녹지와 각 블록간의 최단거리를 구하였다. 토지이용구조와 야생조류 출현특성과의 상관분석에서 블록면적, 녹지율, 건폐율은 야생조류 출현종수, 출현개체수에 영향을 주는 요인으로 분석되었다. 녹지구조와 야생조류 출현특성과의 상관분석에서 층위별 녹지용적, 블록내 평균 녹지패치면적, 교목층 수고는 야생조류 출현종수, 출현개체수에 영향을 주는 요인으로 분석되었다.

• 한국조경학회지
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• 제52권1호
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• pp.59-70
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• 2024

도시화가 진행되면서 공원녹지에 대한 수요는 증가하고 있다. 공원녹지는 도시 내에서 사람들이 자유롭게 옥외활동을 할 수 있는 공간으로 인식되고 있어 중요한 공간이다. 공원서비스 권역은 거리를 기반으로 어느 범위까지 서비스를 제공하고 있는지를 보여주는 척도이다. 이 과정에서 접근성이라는 개념은 중요하게 작용하며 특히 보행은 사람의 가장 기본적인 이동수단으로서 공원 이용에 많은 영향을 미치고 있다. 하지만 현재 공원서비스 권역 분석은 소외지역을 발견하는 것에 중점을 두고 있어 수혜지역에 대한 세부적인 평가는 미비한 상황이다. 본 연구에서는 보행네트워크의 보행접근성을 바탕으로 공원서비스 권역을 평가하고자 한다. 공원서비스는 이용자가 직접 공원을 방문함으로써 발생하는 서비스로서 접근성이 이용 가능성으로 나타날 것으로 판단된다. 보행네트워크의 정량화를 위하여 본 연구에서는 공간구문론을 활용하여 통합도 값을 바탕으로 보행접근성 분석을 진행하였다. 통합도 값은 보행네트워크의 접근성 정도를 수치화하여 보여주는 지표로서 본 연구에서는 통합도 값이 높을수록 공원 이용 가능성이 높다고 해석하였다. 연구의 결과는 다음과 같다. 첫째, 분당구의 공원서비스 권역은 43%를 차지하고 있으며, 보행접근성이 높은 구간이 대부분 포함되어 있지만 일부 보행접근성이 좋은 구간은 제외되어 있다. 이는 도시계획 과정에서 주거지역과 상업 및 업무 지역이 우선적으로 지정되고 그 후에 공원녹지 지역이 선정되는 과정에서 나타나는 현상으로 볼 수 있다. 둘째, 분당구를 기준으로 공원서비스 권역 및 공원서비스 권역 내 보행접근성을 법정동별로 분류하였다. 개별 법정동 별로 차이가 나타나며, 이에 따른 공원에 대한 이용 가능성이 다르게 나타날 것으로 예상된다. 또한, 같은 도시계획 과정에서 만들어진 지역이라도 보행접근성에 따른 공원서비스 권역의 평가는 차이가 나타났다. 이를 활용하여 생활권 계획에 반영될 수 있는 개별 동 단위의 평가가 가능하며 추후 이를 반영한 공원녹지 정책에서 유용한 지표로 활용될 수 있다.