• 디지털융복합연구
• /
• 제14권12호
• /
• pp.13-25
• /
• 2016

본 연구는 2012년부터 2014년까지 국민연금 임의가입자의 계약자 및 계약특성이 해약 행동에 미치는 효과를 로지스틱 회귀모형을 사용하여 분석하였다. 첫째, 남성이 여성보다 탈퇴 오즈가 낮으며 신규가입자 집단에서는 더 큰 차이를 보인다. 둘째, 연령이 증가함에 따라 탈퇴 오즈는 증가하다가 감소하는 특징을 보인다. 셋째, 예상 수익비의 증가는 탈퇴 행동을 억제하는 것으로 나타났다. 넷째, 2013년 국민연금과 기초연금 간 연계 안 발표 결과 전년도에 비해 탈퇴 오즈가 증가하였고 신규가입자 집단에서는 그 크기가 더 크게 나타났다. 다섯째, 17개 광역시 도를 기준으로 광역시 단위에 거주하는, 도시지역 가입자의 탈퇴 오즈가 낮은 것으로 나타났다. 한편, 가입기간과 기준소득 월액과 같은 계약특성의 경우, 탈퇴 오즈에 미치는 영향은 유의미하지만 크기는 작게 나타났다. 본 연구는 향후 임의가입자 유형별 관리방안에 대한 아이디어를 제시하고 특히 예상 수익비의 변화가 해약률에 미치는 영향을 예측할 수 있음을 보였다.

• 한국군사과학기술학회지
• /
• 제14권3호
• /
• pp.423-431
• /
• 2011

Warfighting experimentation is an important process for identifying requirements against changing military environment and for verifying proposed measures for reforming military service. The wargame simulation experiment is regarded as one of the most effective means to warfighting experimentation, and its importance is increasing than ever. On the other hand, the results of wargame experiments could be unreliable due to the uncertainty involved in the experimental procedure. To improve the reliability of the experimental results, systematic experimental procedures and analysis methods must be employed, and the design and analysis of experiments technique can be used effectively for this purpose. In this paper, AWAM, a wargame simulator, is used to optimize the organization of operational troops. The simulation model describes a warfighting situation in which the 'survival rate of our force' and the 'survival rate of the enemy force' are considered as responses, 'the numbers of weapons in the squad' as control factors, and 'the uncontrollable variables of the battlefield' as noise factors. In addition, for the purpose of effective experimentation, the product array approach in which the inner and outer orthogonal arrays are crossed is adopted. Then, the signal-to-noise-ratio for each response and the desirabilities for the means and standard deviations of responses are calculated and used to determine a compromise optimal solution. The experimental procedures and analysis methods developed in this paper can provide guidelines for designing and analyzing wargame simulation experiments for similar warfighting situations.

• 대한산업공학회지
• /
• 제43권2호
• /
• pp.100-111
• /
• 2017

Evaluating the performance of R&D Activity is complicated because it is hard to quantify the R&D results unlike the traditional manufacturing or service industries. Recently, to overcome this, process-focused evaluation methods applying the philosophy of quality into R&D environment have been introduced. However, these quality activities are mainly conducted without feedback system after the evaluation work is done. The aim of this study is to present a R&D quality diagnosis framework to obtain the improvement opportunities from R&D process perspective. The research is designed as follows : First, R&D standard process and R&D quality elements are derived from a literature review. Second, the diagnosis objects are obtained by investigating the R&D quality elements at each R&D steps. Third, a two-dimensional diagnosis model, which enables the objective measurement of the 'system compatibility' and 'accomplish level', is presented. The proposed method can provide an effective way to find opportunities for efficient quality improvement of R&D process.

• 한국통신학회논문지
• /
• 제41권10호
• /
• pp.1190-1196
• /
• 2016

본 논문에서는 VSAT 기반 위성통신 시스템에서 효율적인 인터넷 서비스 제공을 위한 계층 간 프로토콜 연동 구조 모델을 제시하고 이를 구현하여 제안된 모델의 동작을 검증한다. VSAT 기반 위성통신 시스템은 대부분 DVB-S2 표준을 사용한다. 그러나 DVB-S2는 방송 서비스 중심으로 설계되었기 때문에 IP 기반 인터넷 프로토콜을 지원하기에는 비효율성이 많이 존재한다. 이를 해결하기 위해 계층 2 프로토콜인 generic stream encapsulation (GSE)가 제정되었다. 본 논문은 IP 프로토콜과 GSE 프로토콜과의 연동, GSE 프로토콜과 DVB-S2와의 연동 방법에 대해 제안한다. 또한 컴퓨터 소프트웨어를 이용하여 제안된 계층 간 연동 프로토콜을 구현하고 NI사의 universal software radio peripheral (USRP) 및 상용 DVB 수신기를 통해 구현된 내용의 동작을 검증한다.

• 환경영향평가
• /
• 제21권1호
• /
• pp.119-132
• /
• 2012

Biodiversity is a key element of ecosystem of which function provides essential product and service in human life. In the course since development projects often causes damages to biodiversity, environmental impact assessment technique must be capable of accurately assessing potential impact from flora and fauna and to entire ecosystem. Korea needs improvement of its assessment technique that is compatible with Korean environmental regulatory standard that is generally stricter than that of most countries. This study attempts to explore both domestic and overseas biodiversity assessment techniques and analyze each stage of environmental impact assessment. The data is collected from numbers of literatures selected by navigating both domestic and overseas literature database with certain keywords. Among the 44 selected papers, overseas publications outnumber those of domestics, and there are more researches on assessment methodology of biodiversity than assessment tool and model. In terms of environmental impact assessment, the number of papers on environmental impact forecast exceeds the numbers of papers on current state of environment and the impact minimizing solution. Therefore, contents and trends of those researches in the different stages of environmental impact assessment discussed in this paper not only suggest potential impact on biodiversity and minimization solutions in detail, but is also a valuable resource particularly for biodiversity relevant environmental assessment technique improvement in Korea. Proposing of a new direction of improvement in biodiversity assessment techniques makes this study significant, and further research for preservation of biodiversity should follow up to provide an improvement scheme for biodiversity assessment techniques in the future.

• 한국도로학회논문집
• /
• 제15권1호
• /
• pp.143-154
• /
• 2013

PURPOSES: Design of approach roads of rest areas in highway has many drawbacks such as geometric design elements. There has been traffic accidents occured in these approach roads of rest areas. Thus, design criteria is required in order to protect accidents from being occurred. In case of Korea, geometric structure design criteria of entry facilities, such as toll-gate, interchange, junction etc was established. However there are no presence in a detailed standards for geometric structure of the rest area which affiliated road facilities. METHODS: In this study, analytic on accidents was carried out in regards to the entry of geometric structure of resting areas by utilizing a sight survey and an investigation research of traffic accidents. The survey was targeting 135 general service areas. Collisions with physical channelization and safety facilities occurred due to speeding, rapid entry, and etc at the entrance nose section. At the entrance connector roads, accidents caused by speeding, negligence, over-operation of handle of drivers were main reason of accidents. Discriminant analysis were conducted about geometric elements to distinguish influencing factors for traffic accidents. the lengths and access angles of the entrance connector roads were regarded as to have the high relation with traffic accidents. RESULTS: After classifying the design section of resting areas' entry as well as derive design elements on each section, a speed measurement by targeting entry of rest areas and car behavior surveys were performed, then each element's minimum standard was derived through the analyses. According to the speeds at the starting/end point of entrance connector road, the range of the junction setting angle of the entrance connector road is defined as $12^{\circ}{\sim}17^{\circ}$ and the connector length model was suggested. CONCLUSIONS: Suggest improvement plans for existing rest areas that can be applied realistically. This should be corresponded to the standards of entry and exit of developed rest areas.

• 임상간호연구
• /
• 제25권3호
• /
• pp.294-302
• /
• 2019

Purpose: The purpose of this study was to investigate the wage structure of hospital nurses in Korea and to analyze the factors that determine the level of nurses' wages. Methods: First, a mobile survey on nurses' wages was conducted with a total of 3,742 nurses working in hospitals. A literature review was also done. Second, a regression model was applied to analyze the determinants of nurses' wages. Results: The average monthly wage of 3,742 nurses based on the survey was KRW 3,588,000 and the standardized monthly income of 3,742 nurses was estimated to be KRW 3,364,000 as of the end of 2018. The results of regression analysis(R²=61.7%) showed that gender, nursing experience, designated night duty, ownership, and number of beds were statistically significant variables for nurses' wages at 1% significance level. The monthly wage of nurses working in total nursing care wards was not significantly different from those working in other wards at 5% significance level. Conclusion: The substantial difference in nurses' wages according to job career, hospital size, region, etc may result in the low proportion of nurses with more than three to five years of service experience and the high turnover of less-experienced workers. Consideration should be given to adjust the gap in wage level and a standard nurse wage system could be effective measures.

• 융합정보논문지
• /
• 제9권12호
• /
• pp.39-46
• /
• 2019

엔터프라이즈 환경의 표준화 경쟁은 백엔드의 데이터 티어로 시작하여 대표적인 엔터프라이즈 미들 티어가 스프링 프레임워크로 받아들여짐으로써 표준화로 안정화되고 있는 실정이다. 또한 점차 빠른 주기로 새로운 디바이스의 출현으로 웹과 모바일 서비스에 대한 호환성 확보가 웹 서비스 기업들의 중요한 경쟁력이 되고 있다. 그러나 국내 기업들은 이러한 정보화 시대의 격변한 환경 변화에 적절한 역량있는 기술 인력을 확보하지 못하고 있으며, 교육중심 대학들의 교육과정에서도 새로운 역량중심의 교육과정의 요구를 반영하지 못하고 있는 실정이다. 따라서 본 연구에서는 이러한 엔터프라이즈 시스템 플랫폼 환경에서 필요한 역량중심의 기술을 습득과 교육과정을 개발하기 위하여 스프링 프레임워크 환경에서 스프링 데이터 JPA를 활용한 시스템을 분석 및 설계 단계별로 문서화 작성을 통하여 구현하였다. 향후 엔터프라이즈 환경에서의 바로 적용할 수 있는 풀 스택 역량중심의 교육과정 및 캡스톤 디자인 교육과정의 참조 모델을 제공하고자 한다.

• 지질공학
• /
• 제31권3호
• /
• pp.269-281
• /
• 2021

Land creeping is the imperceptibly slow, steady, downward movement o f slope-forming soil or rock. Because creep-related failures occur frequently on a large scale without notice, they can be hazardous to both property and human life. Korea Forest Service has operated the prevention and response system from land creeping which has been on the rise since 2018. We categorized and proposed three survey steps (e.g., preliminary, regional, detailed) for investigation of creeping susceptibility site with a focus on geophysical mapping of a selected test site, Yongheung-dong, Pohang, Korea. The combination of geophysical (dipole-dipole electrical resistivity tomography and reciprocal seismic refraction technique, well-logging), geotechnical studies (standard penetrating test, laboratory tests), field mapping (tension cracks, uplift, fault), and comprehensive interpretation of their results provided the reliable information of the subsurface structures including the failure surface. To further investigate the subsurface structure including the sliding zone, we performed high-resolution geophysical mapping in addition to the regional survey. High-resolution seismic velocity structures are employed for stability analysis because they provided more simplified layers of weathering rock, soft rock, and hard rock. Curved slip plane of the land creeping is effectively delineated with a shape of downslope sliding and upward pushing at the apex of high resistive bedrock in high-resolution electrical resistivity model with clay-mineral contents taken into account. Proposed survey steps and comprehensive interpretation schemes of the results from geological, geophysical, and geotechnical data should be effective for data sets collected in a similar environment to land-creeping susceptibility area.

• 한국인터넷방송통신학회논문지
• /
• 제21권6호
• /
• pp.77-82
• /
• 2021

요검사는 물리적 성상 검사, 화학적 검사, 현미경 검사 세 가지가 있다. 이 중에서 화학적 요검사는 일반인이 쉽게 접근하는 방법으로 요검사지의 화학반응을 눈으로 표준비색표와 비교하거나 휴대용 요검사기를 별도로 구매하여 검사를 진행한다. 현재는 스마트폰의 보급이 대중화되어 스마트폰을 활용한 요검사 서비스 연구가 높아지고 있다. 요검사 스크리닝 애플리케이션은 스마트폰을 활용한 요검사 서비스 중 하나이다. 그러나 요검사 스크리닝 애플리케이션으로 촬영한 요검사 패드 RGB 값은 조명영향으로 인해 큰 편차가 발생한다. 요검사 패드 RGB 값의 편차는 요검사 판별의 정확도를 떨어뜨린다. 따라서 본 논문에서는 스마트폰 기반 요검사 스크리닝 애플리케이션으로 촬영한 요검사지를 검사 항목별 요검사 패드로 분류한 후 CNN을 통해 요검사 패드 이미지 판별의 정확도를 높인다. 요검사지는 다양한 배경에서 촬영하여 CNN 이미지를 생성하였으며 ResNet-50 CNN 모델을 사용하여 요검사 판별을 분석하였다.