• Journal of Animal Environmental Science
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• v.17 no.2
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• pp.61-70
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• 2011

This survey was conducted to investigate the current situation of ground condition of barn, moisture condition, feeding facilities, disinfection tool, etc. The data from a total of 305 farms were collected and analysed for establishment of managemental target in Hanwoo farm. The ground condition of barn was evaluated as a result of "moderate level" (46.4%). The moisture removal on the ground was conducted with the aid of electric fan (36.4%). The natural wind and sunlight should be used gradually for economic effect in farm. The exchange of floor straw was mostly conducted to remove the bad smell of barn (33.7%). 37.0% of farms had no the electric fan in internal barn, this instrument must be installed for control of body temperature and internal moisture in the future. Most of feeding facilities were operated by hand(88.2%). Modern farms should be installed with automatic feeding system. Farmer's skill of management was evaluated as a "2.80" of 5 points. Accordingly, farmers should be trained with high level of technical competitive skill. In conclusion, Hanwoo farms should be promoted and improved for enhancement of income through introduction to scientifically modern feeding skill.

• Journal of Korean Society for Geospatial Information Science
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• v.23 no.2
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• pp.39-48
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• 2015

Lately, Unmanned Aerial Vehicles(UAV), Unmanned Aerial Systems(UAS) or also often known as drones, as a data acquisition platform and as a measurement instrument are becoming attractive for many photogrammetric surveying applications, especially generation of the high density point clouds(HDPC). This paper presents the performance evaluation of a low-cost rotary wing quadrocopter UAS for generation of the HDPC in a test bed environment. Its performance was assessed by comparing the coordinates of UAS based HDPC to the results of Network RTK GNSS surveying with 62 ground check points. The results indicate that the position RMSE of the check points are ${\sigma}_H={\pm}0.102m$ in Horizonatal plane, and ${\sigma}_V={\pm}0.209m$ in vertical, and the maxium deviation of Elevation was 0.570m within block area of ortho-photo mosaic. Therefore the required level of accuracy at NGII for production of ortho-images mosaic at a scale of 1:1000 was reached, UAS based imagery was found to make use of it to update scale 1:1000 map. And also, since this results are less than or equal to the required level in working rule agreement for airborne laser scanning surveying of NGII for Digital Elevation Model generation of grids $1m{\times}1m$ and 1:1000 scale, could be applied with production of topographic map and ortho-image mosaic at a scale of 1:1000~1:2500 over small-scale areas.

• Publications of The Korean Astronomical Society
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• v.24 no.1
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• pp.53-64
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• 2009

MIRIS is the main payload of the STSAT-3 (Science and Technology Satellite 3) and the first infrared space telescope for astronomical observation in Korea. MIRIS space observation camera (SOC) covers the observation wavelength from $0.9{\mu}m$ to $2.0{\mu}m$ with a wide field of view $3.67^{\circ}\times3.67^{\circ}$. The PICNIC HgCdTe detector in a cold box is cooled down below 100K by a micro Stirling cooler of which cooling capacity is 220mW at 77K. MIRIS SOC adopts passive cooling technique to chill the telescope below 200 K by pointing to the deep space (3K). The cooling mechanism employs a radiator, a Winston cone baffle, a thermal shield, MLI (Multi Layer Insulation) of 30 layers, and GFRP (Glass Fiber Reinforced Plastic) pipe support in the system. Optomechanical analysis was made in order to estimate and compensate possible stresses from the thermal contraction of mounting parts at cryogenic temperatures. Finite Element Analysis (FEA) of mechanical structure was also conducted to ensure safety and stability in launching environments and in orbit. MIRIS SOC will mainly perform Galactic plane survey with narrow band filters (Pa $\alpha$ and Pa $\alpha$ continuum) and CIB (Cosmic Infrared Background) observation with wide band filters (I and H) driven by a cryogenic stepping motor.

• Journal of Digital Contents Society
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• v.12 no.1
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• pp.85-94
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• 2011

QoS(Quality of Service) is defined as "The collective effect of service performance which determines the degree of satisfaction of a user of the service" by ITU-T Rec. E.800. While the use of VoIP(Voice Over Internet Protocol) has been widely implemented, persistent problems with QoS are a very important sue which needs to be solved. This research is finding the assignment of VoIP QoS to deduct how to manage the control system and presenting the QoS control process and framework under NGN(Next Generation Network) environment. The trial framework is the modeling of the QoS measurement metrics, instrument, equipment, method of measurement, the series of cycle & the methodology about analysis of the result of measurement. This research underlines that the vulnerability of the VoIP protocol in relation to its QoS can be guaranteed when the product quality and management are controlled and measured systematically. Especially it's very important time to maintain the research about VoIP QoS measurement and control because the big conversion of new network technology paradigm is now spreading. In addition, when the proposed method is applied, it can reduce an overall delay and can contribute to improved service quality, in relation to signal, voice processing, filtering more effectively.

• Environmental and Resource Economics Review
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• v.26 no.4
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• pp.577-612
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• 2017

In response to climate change, Korea is attempting to shift the paradigm of energy and climate change policies by introducing carbon pricing based on market mechanisms. While policy adoption is proceeding at a rapid pace, the introduction of carbon pricing has been faced with great opposition from industry. This study measures to what extent Korean companies understand and accept carbon pricing, using data from a questionnaire survey covering energy consuming companies in 2012, when discussions between the government and such companies about the introduction of a domestic emission trading system were active. It further identifies how preparations and practices for carbon and energy management of companies correlate with their policy understanding and acceptance. The analysis results show that the surveyed companies indicate moderate understanding of, as well as resistance to carbon pricing policies, while appreciating the economic incentives and accepting the mandatory regulations in this phase. Companies' understanding is more related to characteristics, i.e., sector, size, etc. than external pressures. This study found that the extent to which companies understand policy is the essential factor in their policy acceptance and related practices. In particular, understanding of carbon policy significantly influences their managerial practices and voluntary activities for carbon and energy practices. This study substantiates the correlation between the level of policy understanding of a company and its carbon and energy practices - something that all countries seeking to introduce carbon pricing in response to climate change should consider prior to policy actually being implemented; in other words, enhancing the understanding of major policy subjects of the new instrument is a key policy strategy that should be elaborated as it will lead to better performance of companies and smoother policy implementation.

• The Journal of the Korea Contents Association
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• v.18 no.6
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• pp.353-363
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• 2018

According to the Digi Capital forecast, the global augmented reality market is expected to grow rapidly by 2020 to reach 150 billion dollars. In particular, high value added effects are expected in education. As ICT advances, digital textbooks are also leading innovative education by adding interactive functions. Advanced countries, including the U.S., are already using digital textbooks that use augmented reality technology in their classes. In line with this technological outlook, the ministry proposed a design plan that applies augmented reality technology to middle school science 1 digital textbooks. A study on middle school science 1 digital textbooks showed that each unit provided short videos. In addition, an investigation into the augmented reality class case showed that it was difficult to establish experimental equipment, lack of equipment (devices), and 3D design contents that did not continue despite the excellence of learning effects. Based on this demand, we designed an augmented reality scenario and system configuration to be applied to the instrument-specific experiments of middle school science 1 digital textbooks to explore and explore the contents of augmented reality by students. This research will replace the dangerous experiments and time consuming experiments for teachers and students by applying augmented reality to science subjects that are essential for the development of digital textbooks.

• Restorative Dentistry and Endodontics
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• v.31 no.1
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• pp.1-10
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• 2006

The purpose of this study was to compare the shaping ability of three Ni-Ti file systems used by dental students or the experts and consequently to aid in choosing a proper systems for educational courses of dental students and beginners. Fifty students and ten dentists who have clinical experience over two years prepared 180 simulated root canals in resin blocks with three Ni-Ti systems; $ProFile^{(R)}\;(PF),\;HeroShaper^{(R)}\;(HS),\;K3^{TM}\;(K3)$. After preparation, the Ni-Ti files were evaluated for distortion and canal preparation time was recorded. The images of pre- and post-instrumented canals were scanned and superimposed. Amounts of increased canal widths, deviation, and centering ratio were calculated at apical 1, 3 and 5 mm levels and statistical analysis was performed The results were as follows : 1. HS showed the shortest preparation time and instrumented canal width in K3 was significantly larger than other groups (P<0.05). 2. At 1 and 3mm levels, all groups had outward deviation. In student group, at the 1mm level, PF had the least deviation (P<0.05). 3. In the centering ratio, the PF had the best centering ability compared to the others at 5mm level. At 1 and 3mm levels, HS and PF had better abilities than K3. Student group had better ratio than the expert at 3mm level with PF (P<0.05). Based on the results, it is surmised that the $ProFile^{(R)}$ is the safest and most ideal instrument for students and beginners.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.9 no.2
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• pp.201-212
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• 2002

Purpose: The purpose of this study was to identify the association between Sasang constitution and type A/B personality. Method: The subjects for this study were 113 Korean adults living in Kangwon Province, the northeastern part of Korea. The data were collected from March 10 to April 13. 2002 using a structured questionnaire. The instrument for this study were QCSSII (Questionnaire for Sasang Constitution Clsssification II) by Kim et al.(1996), and the Revised Type A/B personality by Eysenck & Fulker(1983). The data were analyzed through the SPSS 10.0 for Windows program using frequency, percentage, $x^2$-test, ANOVA, and Pearson correlation coefficient. Results: The results of the study are as follows : 1. Of 113 Korean adults, the portion who were Taieum-in, Soeum-in, Soyang-in was 39.8%, 34.5%, 25.7% respectively. 2. For type A/B personality, mixed type was most common, 19.4% of the participants were of type B and 8.0%., type A. 3. For type A/B behavior, mixed type was most common at 47.8% and type A was 2.7%. 4. There were statistically significant differences in the Sasang constitutional type according to BMI (F=14.542, P<.001), and alcohol consumption (F=4.256, p<.018). 5. There were significant difference between type A/B Personality and BMI (F=3.592, P<.032). 6. The data shows correlations between BMI and amount smoked per day (r=2.74, P<.004), between BMI and alcohol consumption (r=-.303, p<.008), between BMI and Sasang constitutional type (r= -.592, p<.0001), between BMI and type A/B personality (r=285, p<.011), between amount smoked per day and alcohol consumption (r= .-361, p<.001). between alcohol consumption and Sasang constitutional type (r=-.306, p<.019). between perceived health state and type A/A personality (r= .246, p<.011). Conclusion: According to the above findings, it can be concluded that further research is need to understand the Sasang constitution for the discipline of Nursing and for nurses to prepare nursing protocols relevant to Sasang constitutional care. Also, Sasang constitution has to be considered in research and practice in the health care delivery system.

• The Bulletin of The Korean Astronomical Society
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• v.39 no.1
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• pp.49.1-49.1
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• 2014

The NISS (Near-infrared Imaging Spectrometer for Star formation history) onboard NEXTSat-1 is the near-infrared instrument onboard NEXTSat-1 which is being developed by KASI. The imaging low-resolution spectroscopic observation in the near-infrared range for nearby galaxies, low background regions, star-forming regions and so on will be performed on orbit. After the System Requirement Review, the optical design is changed from on-axis to the off-axis telescope which has a wide field of view (2 deg. ${\times}$ 2 deg.) as well as the wide wavelength range from 0.95 to $3.8{\mu}m$. The mechanical structure is considered to endure the launching condition as well as the space environment. The design of relay optics is optimized to maintain the uniform optical performance in the required wavelength range. The stray light analysis is being made to evade a light outside a field of view. The dewar is designed to operate the infrared detector at 80K stage. From the thermal analysis, we confirmed that the telescope can be cooled down to around 200K in order to reduce the large amount of thermal noise. Here, we report the current status of the NISS development.

• Korean Journal of Childcare and Education
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• v.7 no.2
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• pp.43-60
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• 2011

The purpose of this study is to investigate the principals' and teachers' assessment about the assistance program for the evaluative accreditation of child care centers. Subjects were 138 teachers and principal who work in private(family) child care center in D and G city. An instrument to survey of this study was 'Assistance Program Evaluation Scale for the Evaluative Accreditation of Child Care Centers'(Nam, 2010) and 'Self-Assessment of Developmental Levels for Kindergarten Teacher'(Baek & Jo, 2004). Data were analyzed by paired t-test and ANOVA With SPSS 18.0 Version. The results of this study were as follows: First, there were significant differences in the both 'assistance system category' and 'assistance content category' between child care teacher group and principal group. Second, there were significant differences in the 'assistance content category' between the high group and the low group in expertise level. Third, significant differences were found to exist between a second-grade certificate level of child care teacher and a first-grade certificate level of child care teacher in terms of 'assistance domain'.