• Journal of Positioning, Navigation, and Timing
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• 제7권4호
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• pp.295-305
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• 2018

Network RTK is a highly practical technology that can provide high positioning accuracy at levels between cm~dm regardless of user location in the network by extending the available range of RTK using reference station network. In particular, unlike other carrier-based positioning techniques such as PPP, users are able to acquire high-accuracy positions within a short initialization time of a few or tens of seconds, which increases its value as a future navigation system. However, corrections must be continuously received to maintain a high level of positioning accuracy, and when a time delay of more than 30 seconds occurs, the accuracy may be reduced to the code-based positioning level of meters. In case of SSR, which is currently in the process of standardization for PPP service, the corrections by each error source are transmitted in different transmission intervals, and the rate of change of each correction is transmitted together to compensate the time delay. Using these features of SSR correction is expected to reduce the performance degradation even if users do not receive the network RTK corrections for more than 30 seconds. In this paper, the simulation data were generated from 5 domestic reference stations in Gunwi, Yeongdoek, Daegu, Gimcheon, and Yecheon, and the network RTK and SSR corrections were generated for the corresponding data and applied to the simulation data from Cheongsong reference station, assumed as the user. As a result of the experiment assuming 30 seconds of missing data, the positioning performance compensating for time delay by SSR was analyzed to be horizontal RMS (about 5 cm) and vertical RMS (about 8 cm), and the 95% error was 8.7 cm horizontal and 1cm vertical. This is a significant amount when compared to the horizontal and vertical RMS of 0.3 cm and 0.6 cm, respectively, for Network RTK without time delay for the same data, but is considerably smaller compared to the 0.5 ~ 1 m accuracy level of DGPS or SBAS. Therefore, maintaining Network RTK mode using SSR rather than switching to code-based DGPS or SBAS mode due to failure to receive the network RTK corrections for 30 seconds is considered to be favorable in terms of maintaining position accuracy and recovering performance by quickly resolving the integer ambiguity when the communication channel is recovered.

• 한국의료질향상학회지
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• 제10권2호
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• pp.204-215
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• 2003

Background : ICD-10 Classification, which is used domestically as well as internationally, has limited use in the clinical practice since it is developed for at disease statistics and epidemiology. Therefore, the purposes of this study were to improve the quality of diagnosis by constructing a new disease classification based on the diagnoses doctors currently make in the clinical setting and connecting this classification with OCS and EMR, and to meet the demands of doctors for high quality medical study data in medical research. Methods : The specialists in each ophthalmic subfield collected clinical diagnoses and abbreviations based on the ophthalmology textbooks and confirmed the classifications. Total number of clinical diagnoses collected was totaled 672, for which ideal diagnoses had been selected and a new model of disease classification model in connection with ICD-10 was constructed. The constructed classification of clinical diagnoses consisted of six steps: the first step was the classification by ophthalmic subspecialty field; the second to fifth steps were the detailed classification by each specialty field; the sixth step was the classification by site. Results : After introducing the new disease classification, research on the use and a pre-post comparison was conducted. The result from the research on the use of the clinical diagnoses in inpatient and outpatient care has shown a gradually increasing tendency. From the pre-post comparison of EMR discharge summary diagnoses, the result demonstrated that the diagnosis was stated correctly and in detail. Since the diagnosis was stated correctly, code classification became correct as well, which makes it possible to construct high quality medical DB. Conclusion : This construction of clinical diagnoses provides the medical team with high quality medical information. It is also expected to increase the accuracy and efficiency of service in the department of medical record and department of insurance investigation. In the future, if hospitals wish to construct a classification of clinical diagnosis and a standard proposal of clinical diagnosis is presented by a medical society, the standardization of diagnosis seems to be possible.

• 무역학회지
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• 제45권2호
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• pp.1-16
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• 2020

Korea is one of active countries in terms of FTA(Free Trade Agreement) around the globe. Local market is not big enough for Korean companies. This is why Korea is actively participating in FTA with various countries. Individual companies should conform to regulation, policy and system relevant to the agreement. Otherwise, it is not easy for companies to enjoy benefits of FTA. The Korean government is using various FTA programs to support domestic companies, in particular SMEs(Small and Medium-Sized Enterprises). FTA-PASS is a representative program. FTA-PASS is an official program of Korea Customs Service. Korean companies can use the program as free. However, some companies may have difficulties regarding the use of FTA-PASS. The program may cause of compatibility problem related their own ERP(Enterprise Resource Planning) systems. This study is designed to analyze determinants of FTA-PASS and ERP system compatibility. Furthermore this study aims to examine effects of the system compatibility on export performances. This study collected data from Koreas SMEs. In specific, the primary data was based on surveys distributed to 303 SMEs. Based on empirical findings, we could get important determinants to improve compatibility between FTA-PASS and ERP systems. For instance, the government support, product standardization, HS Code clearness and market stability could be considered important determinants. Also, according to empirical findings, a positive relationship between system compatibility an export performance was supported. Analyzing comprehensive determinants of system compatibility can be suggested as an important topic for future research.

• 한국컴퓨터정보학회논문지
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• 제16권6호
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• pp.119-130
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• 2011

데이터 품질관리 관점에서 볼 때, 데이터의 품질은 품질정책, 품질조직, 업무프로세스, 업무규칙 등 여러 요인에 의해 영향을 받는다. 이중에서도 업무규칙은 실제 데이터를 조작하는 행위의 지침이 되는 것으로써 데이터 품질에 직접적인 영향을 미친다. 여러 기관의 데이터베이스를 통합하여 단일의 데이터베이스를 구축하는 경우에는 더 신중하게 업무규칙을 수립할 필요가 있다. 분산된 데이터베이스 내에 있는 데이터를 단일의 데이터베이스로 통합한다는 것은 단순히 데이터의 통합만을 의미하는 것이 아니라 상이한 스키마, 코드 체계, 데이터 표준 등을 사전에 고려해야 함을 의미한다. 이런 요소들을 고려하더라도 데이터 자체는 형식, 단위, 표현 등에 따라서 다양한 모습을 가진다. 결국 데이터베이스의 구조적인 문제와 데이터 자체의 의미적인 문제가 데이터베이스 통합과 통합된 데이터베이스 내 데이터의 품질 제고를 위한 선결 과제라 할 수 있다. 이러한 문제들을 해결하기 위해서는 먼저 통합 시 통합 모델의 설계가 필요하고, 통합된 데이터베이스의 데이터에 대한 정제가 필요하다. 범부처적으로 분산되어 있는 국가R&D정보를 수집하여 서비스하는 국가과학기술종합정보서비스(NTIS)도 여러 기관에 존재하는 데이터베이스를 연계 통합하여 단일의 데이터베이스를 구축하였다. NTIS의 사례를 통해 체계적인 통합 모델 수립과 정제에 의해 통합된 데이터베이스의 데이터는 그렇지 않은 데이터보다 정확도 측면에서 품질이 제고되었음이 입증되었다.