• Atmosphere
• /
• v.29 no.1
• /
• pp.21-39
• /
• 2019

The conventional observations of the Korea Meteorological Administration (KMA) and National Centers for Environmental Prediction (NCEP) are compared in the numerical weather forecast system at the Korea Institute of Atmospheric Prediction Systems (KIAPS). The weather forecasting system used in this study is consists of Korea Integrated Model (KIM) as a global numerical weather prediction model, three-dimensional variational method as a data assimilation system, and KIAPS Package for Observation Processing (KPOP) as an observation pre-processing system. As a result, the forecast performance of NCEP observation was better while the number of observation is similar to the KMA observation. In addition, the sensitivity of forecast performance was investigated for each SONDE, SURFACE and AIRCRAFT observations. The differences in AIRCRAFT observation were not sensitive to forecast, but the use of NCEP SONDE and SURFACE observations have shown better forecast performance. It is found that the NCEP observations have more wind observations of the SONDE in the upper atmosphere and more surface pressure observations of the SURFACE in the ocean. The results suggest that evenly distributed observations can lead to improved forecast performance.

• Journal of The Korean Society of Integrative Medicine
• /
• v.1 no.3
• /
• pp.19-28
• /
• 2013

Purpose : The purpose of this study was to find out the impact of action-observation training and task-oriented training on activities of daily living performance of stroke patients. Method : 30 stroke patients hospitalized in D hospital located in Busan and treated were randomly allocated to Action-Observation Training Group and Task-Oriented Training Group in fifteens. To compare activities of daily living performance before and after therapy intervention, Korea-modified Barthel index (K-MBI) was carried out. Result : In both groups, activities of daily living performance of stroke patients before and after therapy intervention showed statistically significant differences (p<.05) and activities of daily living performance between two groups after therapy intervention showed statistically significant differences. Conclusion : It was found that action-observation training and task-oriented training improved activities of daily living performance of stroke patients. It is considered that the application of action-observation training and task-oriented training to clinical occupational therapy will show a positive effect on the improvement of activities of daily living performance.

• Journal of Korean society of Dental Hygiene
• /
• v.5 no.2
• /
• pp.185-199
• /
• 2005

The purpose of this research is to suggest a new desirable direction to a positive educational program for dental hygeine students, through the analysis of the degrees of observation and performance practice and the student satisfaction. This researched 471 senior dental hygien students from 5 separate universities. SPSS 10.0 for Windows was used to transform the results data analysis into statistics. The students' degree of satisfaction and length of observational/performance practice level were measured. For statistical anlysis the Mean and Standard Deviation were computed and the t-test and ANNOVA were carried out. The significant level of these statistics was a=0.05. 1. 12 weeks practice is the highest in the satisfaction of observation practice was the highest in clinical settings, followed by 16 weeks practice, and 8 weeks practice. 2. 12 weeks practice is the highest in the satisfaction of performance practice, followed by 16 weeks practice, and 8 weeks practice. 3. 8 weeks practice is the highest in the satisfaction of performance practice, followed by 12 weeks practice, and 16 weeks practice. 4. According to the frequency of clinical practice and satisfaction 12 week program of observation/performance practice is the most desirable, followed by 16 weeks practice, and 8 weeks practice.

• Journal of Korea Water Resources Association
• /
• v.55 no.12
• /
• pp.1149-1154
• /
• 2022

The purpose of this research is to select representative observation stations for winter observation equipment performance tests and to present indoor and outdoor conditions for performance tests by considering snowfall, snowfall days, latitude, and altitude distribution for observation stations operated by the Korea Meteorological Administration. Using the snowfall data observed during the winter for 30 years (1981-2010), ten representative observation stations are selected to consider the classification of snowfall days by class, latitude, and altitude distribution of observation stations. As a result of analysis, the suitable point for outdoor experiments was selected as Daegwallyeong, the average number of snowfall days and snowfall days of 5cm or more were 57.5 and 13.2 days, respectively. The indoor experimental conditions are considered to be suitable under temperatures of -15 to 5℃ and humidity of 50% or higher. Results of this research can be used as basic information for conditions and test beds for performance tests of equipment that can respond to heavy snow disasters in winter.

• Atmosphere
• /
• v.33 no.1
• /
• pp.33-47
• /
• 2023

In this study, for the application of observation errors to the Korean Integrated Model (KIM) to utilize the Constellation Observing System for Meteorology, Ionosphere & Climate-2 (COSMIC-2) new satellites, the observation errors were diagnosed based on the Desroziers method using the cost function in the process of variational data assimilation. We calculated observation errors for all observational species being utilized for KIM and compared with their relative values. The observation error of the calculated the Global Navigation Satellite System Radio Occultation (GNSS RO) was about six times smaller than that of other satellites. In order to balance with other satellites, we conducted two experiments in which the GNSS RO data expanded by about twice the observation error. The performance of the analysis field was significantly improved in the tropics, where the COSMIC-2 data are more available, and in the Southern Hemisphere, where the influence of GNSS RO data is significantly greater. In particular, the prediction performance of the Southern Hemisphere was improved by doubling the observation error in global region, rather than doubling the COSMIC-2 data only in areas with high density, which seems to have been balanced with other observations.

• Perspectives in Nursing Science
• /
• v.14 no.1
• /
• pp.1-9
• /
• 2017

Purpose: To study the internal psychological conflicts among nursing students during an infection control protocol carried out in the hospital by measuring their observation skills and performance during clinical training. Methods: Investigation of both pre- and post- infection control was conducted using questionnaires for clinical infection practices. We identified and evaluated the students' observation skills, clinical performance, clinical perception, and internal conflict regarding clinical infection control. We also interviewed the students as part of our study. Results: Among parameters such as clinical performance, observation skills, clinical perception, and internal conflict, the average observation skills (t=5.49, p<.001) were significantly lower, while internal conflict among students (t=-7.23, p<.001) was significantly higher than expected prior to clinical training. Generally, there was a negative correlation between observation skills and internal conflict in every aspect of infection control practice (r=-.281, p=.031). Internal conflict was significantly higher than expected in the context of hand hygiene (t=-2.135, p=.037), personal hygiene (t=-3.48, p=.002), and ventilator management (t=-3.69, p<.001). Clinical performance of students in the context of hand hygiene (t=4.69, p<.001), personal hygiene (t=2.06, p=.044), and ventilator management (t=2.68, p<.001) was significantly lower than expected prior to clinical training. Conclusion: Our findings showed that internal psychological conflict is higher when infection control practices are observed or performed to a lesser degree. Therefore, reinforcing education regarding infection control among students, such as developing a systematic program, or consecutive training and monitoring, is suggested.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.24 no.1
• /
• pp.15-21
• /
• 2020

In this paper, the observation performance of the electro-optical telescope system which surveils the unknown space objects, is analyzed by the Modeling & Simulation(M&S). The operation concept for the observation of the unknown space objects using two telescope systems is considered and the M&S models are constructed. Based on the operation concept for observing the unknown space objects, the estimated orbit is generated by Initial Orbit Determination(IOD) and the observation performance is analyzed according to the offset compensation cycle for the estimated orbit. The result of the M&S based analysis in this paper shows that the observation performance increases with the shorter offset compensation cycle, and decreases with the longer offset compensation cycle. Therefore, to improve the performance of the telescope system which surveils the unknown space objects, the observation system with accurate initial orbit determination or shorter offset compensation cycle should be designed and constructed.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.19 no.11
• /
• pp.2731-2738
• /
• 2015

The importance of disaster observation facilities and system are increasing around the world in order to predict and prevent water disasters, which cause serious damage to life and property. A performance test center was built to stabilize performance, compatibility, and reliability of devices, and to verify new S/W. The aim of this study is to make a guideline to build standard verifying system for hydrological observation devices by building the performance test center. In addition, efficiency of management and operation of hydrological devices can be enhanced through device analysis, maintenance, database building, and grade certificate publishment after the device test.

• Journal of Korean society of Dental Hygiene
• /
• v.10 no.3
• /
• pp.503-512
• /
• 2010

Objectives : In this study, in order to provide basic data for more efficient and systematic clinical practice training by recognizing the need of effective and standardized operation of clinical practice accomplished in clinical fields belonging to the curriculum of dental hygiene department, grasping, investigating, and analyzing satisfaction degree of the clinical practice through student's frequency of observation practice and performance practice. Methods : A survey was conducted against 208 students in the 3rd grade of 4 dental hygiene departments located in Jeonbuk province. Results : As results, it was found that for the observation practice frequency according to clinical practice term by universities, the basic clinical practice was higher in A, B, and D university and that the correction and practice was higher in D university. For the performance practice frequency, it was found that basic care practice was higher in B and D university, oral medicine practice, preventive dentistry practice, and periodontal practice were higher in A and C university, pediatric dentistry practice was higher in B and C university, prosthetic dentistry practice was higher in A, B, and C university, and oral surgery practice was higher in B university. It was identified that satisfaction was higher in the basic care practice, the preventive dentistry practice, and the periodontal practice in the range of clinical practice, and the A and C university receiving higher score in the performance practice frequency got higher score in the oral medicine practice, the preventive dentistry practice, and the periodontal practice. Conclusions : As the basic care practice items in the clinical practice area which got relatively higher score in observation practice, performance practice, and satisfaction degree of the dental hygiene trainee are basic and essential works that they will perform the most frequently, it is considered that integrated clinical practice training including the intramural practice course is required.

• Journal of Positioning, Navigation, and Timing
• /
• v.7 no.1
• /
• pp.15-24
• /
• 2018

This study analyzed positioning accuracy of the multi-differential global navigation satellite system (DGNSS) algorithm that integrated GPS, GLONASS, and BDS. Prior to the analysis, four sites of which satellite observation environment was different were selected, and satellite observation environments for each site were analyzed. The analysis results of the algorithm performance at each of the survey points showed that high positioning performance was obtained by using DGPS only without integration of satellite navigation systems in the open sky environment but the positioning performance of multi-DGNSS became higher as the satellite observation environments degraded. The comparison results of improved positioning performance of the multi-DGNSS at the poor reception environment compared to differential global positioning system (DGPS) positioning results showed that horizontal accuracy was improved by 78% and vertical accuracy was improved by 65% approximately.