• Korean Journal of Remote Sensing
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• v.39 no.5_1
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• pp.637-654
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• 2023

In recent years, the number of users has been increasing with the rapid development of earth observation satellites. In response, the Committee on Earth Observation Satellites (CEOS) has been striving to provide user-friendly satellite images by introducing the concept of Analysis Ready Data (ARD) and defining its requirements as CEOS ARD for Land (CARD4L). In ARD, a mask called an Unusable Data Mask (UDM), identifying unnecessary pixels for land analysis, should be provided with a satellite image. UDMs include clouds, cloud shadows, terrain shadows, etc. Terrain shadows are generated in mountainous terrain with large terrain relief, and these areas cause errors in analysis due to their low radiation intensity. previous research on terrain shadow detection focused on detecting terrain shadow pixels to correct terrain shadows. However, this should be replaced by the terrain correction method. Therefore, there is a need to expand the purpose of terrain shadow detection. In this study, to utilize CAS500-4 for forest and agriculture analysis, we extended the scope of the terrain shadow detection to shaded areas. This paper aims to analyze the potential for terrain shadow detection to make a terrain shadow mask for South and North Korea. To detect terrain shadows, we used a Hill-shade algorithm that utilizes the position of the sun and a surface's derivatives, such as slope and aspect. Using RapidEye images with a spatial resolution of 5 meters and Sentinel-2 images with a spatial resolution of 10 meters over the Korean Peninsula, the optimal threshold for shadow determination was confirmed by comparing them with the ground truth. The optimal threshold was used to perform terrain shadow detection, and the results were analyzed. As a qualitative result, it was confirmed that the shape was similar to the ground truth as a whole. In addition, it was confirmed that most of the F1 scores were between 0.8 and 0.94 for all images tested. Based on the results of this study, it was confirmed that automatic terrain shadow detection was well performed throughout the Korean Peninsula.

• Journal of the Institute of Convergence Signal Processing
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• v.2 no.3
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• pp.16-23
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• 2001

In this paper, we propose the pseudo n-gram language models for speech recognition with middle size vocabulary compared to large vocabulary speech recognition using the statistical n-gram language models. The proposed method is that it is very simple method, which has the standard structure of ARPA and set the word probability arbitrary. The first, the 1-gram sets the word occurrence probability 1 (log likelihood is 0.0). The second, the 2-gram also sets the word occurrence probability 1, which can only connect the word start symbol and WORD, WORD and the word end symbol . Finally, the 3-gram also sets the ward occurrence probability 1, which can only connect the word start symbol , WORD and the word end symbol . To verify the effectiveness of the proposed method, the word recognition experiments are carried out. The preliminary experimental results (off-line) show that the word accuracy has average 97.7% for 452 words uttered by 3 male speakers. The on-line word recognition results show that the word accuracy has average 92.5% for 20 words uttered by 20 male speakers about stock name of 1,500 words. Through experiments, we have verified the effectiveness of the pseudo n-gram language modes for speech recognition.

• Journal of Practical Engineering Education
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• v.5 no.2
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• pp.139-149
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• 2013

In this paper, we proposed a new Korean Dual system, K-Dual System, and discussed the concepts and details about three sub-models of the system, IPP, W3 and corporate university models. Propose K-Dual system is a new and unique educational model that combines academic study and industrial work in order to solve the various problems of existing work-study parallel educational systems in Korea. K-Dual System has two tracks, Academic and Vocational tracks. Academic track has a long-term field experience training program, IPP program. On the other hands, Vocational track can be divided into two sub-models and those are $W^3$ and corporate university. Finally, we summarized several key points for the successful setup and operation of K-Dual system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.843-850
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• 2020

The purpose of this study is to evaluate the structural risk and weakness of a railway tank car through nonlinear collision analysis according to overseas collision safety standards. The goal is to propose a crash safety design guideline for railway tank cars for transporting dangerous goods in Korea. We analyzed the buffer impact test procedure of railway freight cars prescribed in EN 12663-2 and the tank puncture test criteria prescribed in 49CFR179. A nonlinear finite element model according to each standard was modeled using LS-DYNA, a commercial finite element analysis solver. As a result of the buffing impact test simulation, it was predicted that plastic deformation would not occur at a collision speed of 6 km/h or less. However, plastic deformation was detected at the rear of the center sill and at the tank center supporting the structure at a collision speed of 8 km/h or more. As a result of a head-on test simulation of tank puncture, the outer tank shell was destroyed at the corner of the tank head when 4% of the kinetic energy of the impacter was absorbed. The tank shell was destroyed in the area of contact with the impacter in the test mode analysis of tank shell puncture when the kinetic energy of the moving vehicle was reduced by 30%. Therefore, the simulation results of the puncture test show that fracture at the tank shell and leakage of the internal material is expected. Consequently, protection and structural design reinforcement are required on railway tank cars in Korea.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.262-271
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• 2018

Recently, Daejeon Metropolitan City is planning a futuristic city with Daedeok Special District at the center of its transformation into a city of nature, science and culture along with the fourth industrial revolution. Therefore, this research will divide the 1.5 km distance from the in Doryong-dong, Daejeon, science park intersection to the (Former)Daedeok Science and Culture Center, and propose a space design concept that incorporates IT technologies that fit the characteristics. The center will analyze the space status and derive an experience-oriented space design concept for user-centered planning so that it can serve as a guideline that will provide the fundamental direction for the promotion of the Daedeok Science Culture. Through the field survey, we will look for ways to integrate IT technology with infrastructure that needs improvement and change the distance of Daedeok Science culture as a smart street. The results of the field survey were : (1) made by connecting the persistence of comfort and safety issues, (2) uniformity and efficiency issues, and (3) the experience of identity problems and the orientation of the smart city. To create user-centered distances, we attempted to avoid uniform zoning based solely on infrastructure and zoning focusing on user behavior.

• Journal of Korean Society of Archives and Records Management
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• v.6 no.2
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• pp.157-184
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• 2006

Presidential records which have produced during a presidency as a national center are the evidence of the presidency and main historical records. We have the responsibility to establish fundamental systems to produce such main historical records and to manage such main historical records which could help people and history to judge the presidency based upon the evidence of their activities. The historical appraisal could be achieved not by memory but by evidence. A draft of a proposed law on the management of presidential records which includes the establishment of presidential libraries for the presidential records Mecca is being moored at the National Assembly now. The presidential library is to be considered as a multi-functional national institution which is carrying out the role as an Archives, Museums and Center for the education. In addition, it is imperative for a presidential library to provide user-oriented services to enrich the usability and the value of records, recognizing the change of administration paradigm from a supplier-oriented system to a customer-oriented system. This dissertation, in order to develop presidential library service programs focusing on customers rather than the convenience of administration, reviewed programs of the U.S. presidential libraries as a developed case and proposes guidelines and applicable samples for the development of the Korean presidential library service programs.

• Journal of the Korean Society of Food Science and Nutrition
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• v.45 no.7
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• pp.1049-1056
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• 2016

The prevalence of diabetes is increasing worldwide, particularly in Asian regions such as Korea. It is estimated that the number of diabetic patients will exceed 5 million by 2030 and that about 30% of people with diabetes are unaware of their condition. A comparative analysis was conducted to determine the relationship between dairy food intake and pre-diabetes risk factors in subjects that visited the health examination center of Sunhan Hospital, Republic of Korea. Subjects were classified into two groups according to fasting blood glucose concentrations: 1) normal (fasting blood glucose <100 mg/dL, n=57) and 2) pre-diabetes (100 mg/dL${\leq}$ fasting blood glucose ${\leq}125mg/dL$, n=56). Total dairy food intake tended to be lower in females and subjects with pre-diabetes compared with males and normal subjects, respectively; however, differences between groups were not significant due to a wide range of variations. HbA1c, systolic and diastolic blood pressures were significantly associated with the prevalence of pre-diabetes. Odds ratios for pre-diabetes were significantly reduced per incremental increases in dairy food intakes after adjusting for confounding factors. Findings in the current study suggest that appropriate intake of dairy foods may need to be considered for the prevention of pre-diabetes.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.558-564
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• 2008

The study aims to examine the UCC (User Created Contents) Copyright which use the broadcasting contents. UCC are classified by UGC(User Generated Contents), UMC(User Modified Contents), and URC(User Recreated Contents). Especially UMC and URC correspond to a problem of copyright. Following the Copyright Protection Center investigation in 2006, it reported that 83.7% UCC are infringement of copyright. In spite of remarkable the UCC copyright problem, the concrete resolution does not exist. Also it is difficult to apply the offline legal conformity because of online nature of the UCC. The study observes the UCC copyright dispute instances which use the broadcasting contents and investigates a resolution of the UCC copyright. Considering the online media nature, it tries to analyse CCL(Creative Common License) as the ODR(online Dispute Resolution). It is meaningful to search the possibility of UCC copyright problem through the online technical embodiment.

• Korea Journal of Hospital Management
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• v.23 no.1
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• pp.87-106
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• 2018

Objective: The objective of this study is to examine the association between process quality of inpatient care and risk-adjusted, thirty-day potentially preventable hospital readmission (PPR) rates. Data Sources/Study Setting: This was an observational cross-sectional study of nonfederal acute-care hospitals located in two states California and Florida, discharging Medicare patients with a principal discharge diagnosis of heart failure, acute myocardial infarction, or pneumonia January through December 31, 2007. Data were obtained from the Healthcare Cost and Utilization Project State Inpatient Database of the Agency for Healthcare Research and Quality, Centers for Medicare and Medicaid Services Hospital Compare database, and the American Hospital Association Annual Survey of Hospitals. Study Design: The dependent variable of this study is condition-specific, risk-adjusted, thirty-day potentially preventable hospital readmission (PPR). 3M's PPR software was utilized to determine whether a readmission was potentially preventable. The independent variable of this study is hospital performance for process quality of inpatient care, measured by hospital adherence to recommended processes of care. We used multivariate hierarchical logistic models, clustered by hospitals, to examine the relationship between condition-specific, risk-adjusted, thirty-day PPR rates and process quality of inpatient care, after taking clinical and socio-demographic characteristics of patients and structural and operational characteristics of hospitals into account. Findings: Better performance on the process quality metrics was associated with better patient outcome (i.e., low thirty-day PPR rates) in pneumonia, but not generally in two cardiovascular conditions (i.e., heart failure and acute myocardial infarction). Practical Implication: Adherence to the process quality metrics currently in use by CMS is associated with risk-adjusted, thirty-day PPR rates for patients with pneumonia, but not with cardiovascular conditions. More evidence-based process quality metrics closely linked to 30-day PPR rates, particularly for cardiovascular conditions, need to be developed to serve as a guideline to reduce potentially preventable readmissions.

• Korean Journal of Social Welfare
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• v.67 no.3
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• pp.203-225
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• 2015

Social care service has grown much with the introduction of Long-Term Care Insurance, but it remains difficult to answer in the affirmative to the question: are we providing sufficiently good care? This study has its purpose in figuring out what conditions are necessary to realize good care in our society. The study has used focus group interview (FGI) as a way to acquire realistic knowledge on the conditions that create good care and its deterring factors. The focus group interview, which targeted long-term care workers and facility heads, was conducted three times from January through March 2014, with each session taking about 3 hours. The analysis showed that the components of good care were mutual understanding and recognition through active interaction, making a good relationship based on mutual trust and respect, professionalism of care worker with flexible judgment that provides customized services, professionalism of center manager with appropriate intermediation, and the tripartite partnership among family, elderly, and care worker. Meanwhile, the deterring factors of good care were identified as devaluation of care labor, ambiguous job description and abuse, unprofessionalism of care worker and manager, inappropriate interference and indifference of family, and the structural constraints on long-term care environment.