• 제목/요약/키워드: Regional Differences

검색결과 1,235건 처리시간 0.033초

Near-real-time Ionosphere Modeling Based on Regional GPS Data

  • Park, Kwan-Dong;Hwang, Yoola;Park, Pil-Ho
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
    • /
    • pp.537-539
    • /
    • 2003
  • We present a GPS-derived regional ionosphere model, which estimates Total Electron Content (TEC) in rectangular grids on the spherical shell over Korea. The GPS data from nine GPS stations were used. The pseudorange data were phase-leveled by a linear combination of pseudoranges and carrier phases. During a quiet day of solar activity, the regional ionosphere map indicated 30-45 Total Electron Content Unit (TECU) at the peak of the diurnal variation. In comparison with the Global Ionosphere Map of the Center for Orbit Determination in Europe, RMS differences were at the level of 4-5 TECU for five days.

  • PDF

Determination of Precise Regional Geoid Heights on and around Mount Jiri, South Korea

  • Lee, Suk-Bae
    • 한국측량학회지
    • /
    • 제36권1호
    • /
    • pp.9-15
    • /
    • 2018
  • Precise regional geoid heights on and around Mount Jiri were calculated and were compared to the KNGeoid14 (Korean National Geoid 2014) model. In this study, gravimetric geoid heights were calculated by using RCR (Remove-Compute-Restore) technique and then hybrid geoid heights were calculated by using the LSC (Least Square Collocation) method in the same area. In addition, gravity observation and GNSS(Global Navigation Satellite System) surveying performed in this study were utilized to determine gravimetric geoid heights and to compute hybrid geoid heights, respectively. The results of the study show that the post-fit error (mean and standard deviation) of hybrid geoid heights was evaluated as $0.057{\pm}0.020m$, while the mean and standard deviation of the differences were -0.078 and 0.085 m, respectively for KNGeoid14. Therefore, hybrid geoid heights in this study show more considerable progress than KNGeoid14.

Job Creation, Destruction, and Regional Employment Growth: Evidence from Korean Establishment-level Data

  • CHO, JANGHEE;CHUN, HYUNBAE;LEE, YOONSOO;YI, INSILL
    • KDI Journal of Economic Policy
    • /
    • 제37권4호
    • /
    • pp.55-74
    • /
    • 2015
  • Using the Census on Establishments collected by Statistics Korea, we analyze how the patterns of job creation and destruction differ across counties (si-gun-gu). We measure aggregate employment changes due to establishment startups, expansions, contractions, and shutdowns for each county and quantify the role of such reallocations in explaining variation in employment growth across counties. Overall we find that both rates of net entry and job creation play an important role in explaining differences in net job creation rates across regions. Moreover, counties with high employment growth rates also tend to have high exit and job destruction rates, which suggests that an active process of job reallocation is a key source of regional employment growth.

  • PDF

지역투입계수의 정확성 평가에 관한 연구 (Evaluationn of the Accuracy for Regional Input Coefficients Estimated by Non-survey Methods)

  • 고석남;곽철홍
    • 지역연구
    • /
    • 제12권2호
    • /
    • pp.1-19
    • /
    • 1996
  • The purpose of this paper is to evaluate the accuracy of input coefficients which are usually estimated by various non-survey methods. The resulting analysis showed that there were considerable differences employed. One of the interesting findings was that the simple LQ method was shown to be better then the other non-survey methods with respect to the degree of accuracy. And from a sensitivity analysis which was to show the effect of changes in input coefficients on the level of production by industry, an increase of 10% in the value of input coefficient (machinary and equipment setor) resulted up to 500billion Won in GRP for the case region. Therfore one of the implications which we can derive from the resulting analysis is that it necessary to pay attention to the key coefficients first to save out time and money, while retaining a certain level of accuracy. One thing to be noted, however, is that the key coefficients but the total effects which are calculated through the Leontief inverse matrices. Therfore to enhance the accuracty of input coefficients estimated by nonsurvey methods it is required to handle the relevant setoral data more carefully or to employ semi-survey method in part.

  • PDF

Comparative Analysis of the Role of Business Improvement Districts (BIDs) according to the Characteristics of Business Districts - Based on a case study on BIDs in London, UK -

  • Youngseo Park
    • Architectural research
    • /
    • 제25권2호
    • /
    • pp.19-27
    • /
    • 2023
  • London's BID, introduced in the early 2000s, has grown significantly to fill the gap between government services which have been decreased by the global recession and localism, and the demand for better services to strengthen competitiveness on a global level. Based on this background, this study comparatively analysed two BIDs in London with contrasting regional characteristics to find how BID works differently for the regeneration and sustainable development of regional business districts according to regional characteristics. As a result, the two BIDs ultimately had the goal of improving the local business environment and strengthening the competitiveness of local businesses and had a common point of working in close partnership with the public sector such as the local government. However, depending on the local situation and characteristics, it has been observed that there are differences in the strategies of work and the roles and relationships in the partnership with the public sector.

"천일록(千一錄)"을 통해 본 조선후기 농업의 지역적 특성 (Regional Differentiation of Agrarian Practices in the Late Choson Period as Reflected in Wu Ha-Young's Cheonilrok)

  • 정치영
    • 한국지역지리학회지
    • /
    • 제9권2호
    • /
    • pp.119-134
    • /
    • 2003
  • 본고는 우하영(禹夏永)이 저술한 "천일록(千一錄)"을 통해 18세기 말 우리 나라 농업의 지역적 특성을 살펴보는 것을 목적으로 하였다. 각 지역의 농업특성은 자연조건 농경지 분포 주요작물 농법 농업생산력 등 "천일록(千一錄)"에서 추출해 낼 수 있는 몇 가지 자료를 통해 분석하였다. 결과 당시의 농업은 오늘날과 달리 각 지역마다 뚜렷한 특성을 지니고 있었다. 그리고 이러한 농업의 지역성은 일차적으로 자연환경의 차이에 기인하여, 지형 기후 토양 등 자연조건이 농경지의 분포와 이용, 주요 작물 등을 좌우하였으며 농업생산력에도 결정적인 영향을 미치는 경우가 많았다. 각 지역의 고유한 농법 역시 농민들이 지역 나름의 자연조건을 감안하여 반복된 시행착오를 거치며 개발 발전시켜 온 것들이었다. 이와 더불어, 각 지역의 인구, 농업노동력의 양과 질, 토지소유의 다과, 수리시설을 비롯한 농업기반시설의 충실도 등사회 경제적 상황도 농업의 지역성을 심화시키는 데 지대한 역할을 하였다.

  • PDF

A Comparison of the Effectiveness of Before and After the Regional Trauma Center's Establishment

  • Song, Bo Hyung;Hyun, Sung Youl;Kim, Jin Joo;Cho, Jin Seong;Ma, Dae Sung;Kim, Ha Kyung;Lee, Geun
    • Journal of Trauma and Injury
    • /
    • 제29권3호
    • /
    • pp.68-75
    • /
    • 2016
  • Purpose: The purpose of this study was to analyze the effectiveness of regional trauma center's management. Methods: Data collected between January 2013 and December 2015 from a regional trauma center registry was retrospectively reviewed. The patients who had injury severity score (ISS) greater than 15 and over the age of 18 were included. We compared annual general characteristics, the injury mechanism, the pathway of transportation, the injury severity score, the length of stay in emergency department (ED) and hospital, the in-hospital mortality. Results: The annual numbers of enrolled patients were 337, 334 and 278, respectively. No significant differences were found in the annual patient's median ages, injury mechanism, ISS and in-hospital mortality. The annual proportions of coming from other hospital and the median length of stay in hospital were increased after establishment of regional trauma center. The annual median lengths of stay in ED were decreased remarkably. Conclusion: Through the establishment of regional trauma center, the length of stay in ED can be reduced but not in-hospital mortality. More multidisciplinary cooperation and well-organized study is needed to reduce mortality of major trauma patients and maximize effect of regional trauma center.

지역전략산업 연계 중소기업 지원정책의 효율성 개선방안 (A Study of Business Support Policy for Small-Medium Enterprises in Regional Strategic Industry)

  • 경종수;이보형
    • 한국산학기술학회논문지
    • /
    • 제11권6호
    • /
    • pp.2030-2037
    • /
    • 2010
  • 본 연구는 지역전략산업과 연계되어 추진되고 있는 중소기업지원정책의 효율성 개선방안을 제시하고자 한다. 특히 전략산업 내 중소기업의 기업지원수요를 바탕으로 맞춤형 기업지원 정책방향을 도출하고자 하였다. 본 연구를 통해 우리는 정책의사결정(지역사업의 사업포트폴리오전략, 효율적 사업비 배분, 중점추진과제 등)에 활용하고자 하였다. 연구목적을 달성하기 위해 지역전략산업진흥사업에 참여하고 있는 243개의 중소기업을 대상으로 설문조사를 실시하였다. 연구결과 전략산업별 참여기업들의 특성이 다르게 나타나고 있어 이에 대한 맞춤형 정책창출의 시사점을 도출하였다. 이러한 결과들은 중앙정부 주도의 지역산업 정책기조와 산업현장의 정책수요를 반영하여 지역산업정책의 효율성을 증대하기 위한 시사점이 될 것이다.

지역별 심뇌혈관질환 사망률의 차이 및 영향요인 (Regional Disparity of Cardiovascular Mortality and Its Determinants)

  • 강현진;권순만
    • 보건행정학회지
    • /
    • 제26권1호
    • /
    • pp.12-23
    • /
    • 2016
  • Background: Many studies have explained regional disparities in health by socioeconomic status and healthcare resources, focusing on differences between urban and rural area. However some cities in Korea have the highest cardiovascular mortality, even though they have sufficient healthcare resources. So this study aims to confirm three hypotheses. (1) There are also regional health disparities between cities not only between urban and rural area. (2) It has different regional risk factors affecting cardiovascular mortality whether it is urban or rural area. (3) Besides socioeconomic and healthcare resources factors, there are remnant factors that affect regional cardiovascular mortality such as health behavior and physical environment. Methods: The subject of this study is 227 local authorities (si, gun, and gu). They were categorized into city (gu and si consisting of urban area) and non-city (gun consisting of rural area), and the city group was subdivided into 3 parts to reflect relative different city status: city 1 (Seoul, Gyeonggi cities), city 2 (Gwangyeoksi cities), and city 3 (other cities). We compared their mortalities among four groups by using analysis of variance analysis. And we explored what had contributed to it in whole authorities, city and non-city group by using multiple regression analysis. Results: Cardiovascular mortality is highest in city 2 group, lowest in city 1 group and middle in non-city group. Socioeconomic status and current smoking significantly increase mortality regardless of group. Other than those things, in city, there are some factors associated with cardiovascular mortality: walking practice(-), weight control attempt(-), deficiency of sports facilities(+), and high rate of factory lot(+). In non-city, there are other factors different from those of city: obesity prevalence(+), self-perceiving obesity(-), number of public health institutions(-), and road ratio(-). Conclusion: To reduce cardiovascular mortality and it's regional disparities, we need to consider differentiated approach, respecting regional character and different risk factors. Also, it is crucial to strengthen local government's capacity for practicing community health policy.

전구 및 지역기후 모델 결과에 근거한 동아시아 및 한반도 지역기후 변화 전망 연구 소개 및 고찰 (A Review of Regional Climate Change in East-Asia and the Korean Peninsula Based on Global and Regional Climate Modeling Researches)

  • 홍성유;권원태;정일웅;백희정;변영화;차동현
    • 한국기후변화학회지
    • /
    • 제2권4호
    • /
    • pp.269-281
    • /
    • 2011
  • 전구 및 지역 기후 모델 결과를 분석하여 동아시아와 한반도 지역에 대해 상세한 지역기후의 변화를 전망한 연구를 소개하였다. 특히 IPCC 4차 평가 보고서의 배출 시나리오를 기반으로 국내 연구그룹이 산출한 한반도 지역기후 변화 전망을 소개하고 그 특성을 파악하였다. 배출 시나리오에 따라 강도의 차이가 다소 있지만 미래 한반도의 온난화 경향은 명확한 것으로 나타났다. 강수량의 경우 배출 시나리오와 시기에 따라 다소 상이한 변화 경향을 보이지만, 대부분의 연구에서 공통적으로 미래 집중호우의 발생 빈도와 강도가 증가하는 것으로 나타났다. 이와 같은 지역기후 변화로 인하여 고지대를 제외한 대부분의 남한지역이 아열대 기후구로 점차 변해갈 것으로 전망되며, 이로 인한 생태계와 계절의 변화가 야기될 것으로 예상된다.