• Journal of the Korean Society of Marine Environment & Safety
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• v.15 no.3
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• pp.205-212
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• 2009

With an entry into force of OPRC-HNS on June 14th 2007, response system against any large scale accidents related to HNS is required to respond rapidly and effectively in a national scale, US national response system and national contingency plan for any chemicals in operation were analyzed to understand the characteristics of management system and response system for any HNS driven accidents in the Us. Main characteristics of the US system were well described as an unified information window and an integrated incident command system supported by response facilities, manpower and technical support from other response organizations through good cooperation. In general, response activities are conducted by private sectors, however, the government will take over response activities in case large scale accidents occur in the Us. Expected expenses for response activities are covered by a type of Superfund in the Us. Several applicable ways are proposed to enable NGO to participate in and reorganize response system in ROK, and are feasible in collaboration with other response organizations and private sectors in the aspects of equipment, technology and manpower, Based upon the above activities, it is desirable to reorganize domestic rules and/or regulations related to response measures in ROK.

• Culinary science and hospitality research
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• v.16 no.2
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• pp.330-341
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• 2010

This study aims to identify the nutrition knowledge, attitude on dietary life and eating habits of 281 high school students in Bucheon area and investigate difference and correlation among the factors: details of nutrition knowledge, attitude on dietary life, dietary habit, meal manager and the Body mass index(BMI). Data were analyzed by descriptive analysis, $\chi^2$-test, t-test, Pearson's correlation coefficients and ANOVA test using SPSS window program. The results show that parents were the most influential group in dietary habits and the group of friends were followed. The nutrition knowledge score of female students was higher than the score of male students. There was a significant difference between nutrition knowledge and attitude on dietary life by meal manager. Especially, nutrition knowledge showed the highest difference when they answered that the meal manager was a mother, and the subject 'eating regular meals' was significant when the meal manager was his/her mother. According to the result of the difference by meal manager, respondents preferred eating snacks the most when father was in charge of meal preparing. This group also preferred eating out than the other groups. Moreover, there was a significant correlation between nutrition knowledge and attitude on dietary life.

• Journal of the Korean Association of Geographic Information Studies
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• v.3 no.2
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• pp.1-10
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• 2000

The purpose of this study is to develope a parcel-based automatic simulation system of land price through the integration of urban mathematical model and GIS. The appraisal process of public land price by the local government is simple but is a great time-consuming task. Moreover, it doesn't provide any statistical analysis and spatial presentation tools. So, it is difficult for planners or administrative officials to analyze the variation of land price with spatial idea. From these, a system is developed combining two sub-systems, they are ANN(Artificial Neural Network) for the calculation of land price and GIS for visual presentation. Using Matlab application, ANN model was designed having 3-layer structure and was trained with the sample data taken from Chinju city. With the trained network, the impact of 'road', 'parks', 'height control district' and 'beauty district' on land price in 9 regions(dong) are simulated. The results of the simulation were visualized with ArcView GIS. The automatic simulation system operated through the DDE(Dynamic Data Exchange) conversation between two applications. ArcView was set as client and Matlab as server. Scripting in ArcView and customizing a window of ArcView, this system can execute the whole process of simulation by just clicking a button with mouse. As a conclusion, this system was proved to be an effective and easily controllable planning support system for the land price simulation.

• Progress in Medical Physics
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• v.27 no.1
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• pp.8-13
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• 2016

Dual energy cone-beam CT can distinguish two materials with different atomic compositions. The principle of dual energy cone-beam CT based on modulation layer is that higher energy spectrum can be acquired at blocked x-ray window. To evaluate the possibility of modulation layer based dual energy cone-beam CT, we analyzed x-ray spectrum for various thicknesses of modulation layers by Monte Carlo simulation. To compare with the results of simulation, the experiment was performed on prototype cone-beam CT for 50~100 kVp with CdTe XR-100T detector. As the result of comparing, the mean energy of energy spectrum for 80 kVp are well matched with that of simulation. The mean energy of energy spectrum for 80 and 120 kVp were increased as 1.67 and 1.52 times by 2.0 mm modulation layer, respectively. We realized that the virtual dual energy x-ray source can be generated by modulation layer.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.10
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• pp.3820-3825
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• 2010

The purpose of this study was to identify the effects of acute exercise on antioxidative enzymes in noramal and obese men. The written informed consent was obtained from 16 participants of eight normally healthy persons and eight obesity ones. The baseline level of obesity was determined at 25 % of the body fat. Any subjects had no experiences in participating in exercise and did not take vitamin or mineral supplement. Blood was sampled at five minutes before exercise, at exhaustion, and after 30 minutes of recovery. All statistical analyses and description methods were computed by SPSS window 14.0. Analysis of Covariance(ANCOVA) was performed to know the differences in values between pre- and post- exercise in each group. We found that after exhaustion, the normal group showed higher erythrocyte superoxide dismutase (SOD) activity compared to the obesity group. At exhaustion, the normal group had lower HSP activity compared to the obesity group. Based on the results, an acute exercise of normally healthy people induced an up-regulation of superoxide dismutase (SOD) activity. This plays an important role in the protection of extra-cellular fluid components against peroxide-mediated damage.

• Journal of Korean Society of Transportation
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• v.28 no.3
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• pp.51-57
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• 2010

In this study, damages due to the aircraft noise were examined in more than 190 elementary, middle and high schools near the airports in Korea, and the persecutory idea forecast model was established using the quantification theory type II. Via the survey of 1,012 teachers in the schools, a class interference forecast model was established, and the noise characteristics of five areas, four military/civil common-use airports and one shooting range, were examined. The following conclusions were made from the study. WECPNL values in the five military/civil common-use airports showed that all of them were Class 1 or 2 affected areas, which indicated that they had serious aircraft noise problems to be addressed. The most influential factor in the aircraft noise persecutory idea model was the distance between the airport and the school. It showed a positive relationship at a distance of less than 5 km, and a negative relationship at a distance of 10 km or more. The number and time of aircraft noise exposure as well as the types of airports and window structures had strong influences. The forecast model had a correlation ratio of 0.56, which indicates that it is highly appropriate. In the class interference factor analysis, the time and number of aircraft noise exposure were strong influential factors, and the results varied according to the service duration and sex of teachers. This model had a correlation ratio of 0.61, which indicates it is highly appropriate.

• Journal of KIISE:Databases
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• v.37 no.1
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• pp.1-11
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• 2010

Recently, there has been a growing interest in the processing of continuous queries over multiple data streams. When the arrival rates of tuples exceed the memory capacity of the system, a load shedding technique is used to avoid the system becoming overloaded by dropping some subset of input tuples. In this paper, we propose an effective load shedding algorithm for multi-way windowed joins over multiple data streams. Most previous load shedding algorithms estimate the productivity of each tuple, i.e., the number of join output tuples produced by the tuple, based on its "join attribute value" and drop tuples with the lowest productivity. However, the productivity of a tuple cannot be accurately estimated from its join attribute value when the join attribute values are unique and do not repeat, or the distribution of the join attribute values changes over time. For these cases, we estimate the productivity of a tuple based on its "arrival order" on data streams, rather than its join attribute value. The proposed method can effectively estimate the productivity of a tuple even when the productivity of a tuple cannot be accurately estimated from its join attribute value. Through extensive experiments and analysis, we show that our proposed method outperforms the previous methods in terms of effectiveness and efficiency.

• The KIPS Transactions:PartB
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• v.13B no.4 s.107
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• pp.353-360
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• 2006

This paper presents a robust algorithm for segmenting a vehicle license plate area from a road image. We consider the features of license plates in three aspects : 1) edges due to the characters in the plate, 2) colors in the plate, and 3) geometric properties of the plate. In the preprocessing step, we compute the thresholds based on each feature to decide whether a pixel is inside a plate or not. A statistical approach is applied to the sample images to compute the thresholds. For a given road image, our algorithm binarizes it by using the thresholds. Then, we select three candidate regions to be a plate by searching the binary image with a moving window. The plate area is selected among the candidates with simple heuristics. This algorithm robustly detects the plate against the transformation or the difference of color intensity of the plate in the input image. Moreover, the preprocessing step requires only a small number of sample images for the statistical processing. The experimental results show that the algorithm has 97.8% of successful segmentation of the plate from 228 input images. Our prototype implementation shows average processing time of 0.676 seconds per image for a set of $1280{\times}960$ images, executed on a 3GHz Pentium4 PC with 512M byte memory.

• Resources Recycling
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• v.21 no.5
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• pp.31-37
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• 2012

As a recovery of elemental silicon from the sludge of Si wafer process, a process of mechanical separation-chlorine roasting-electrolysis has been suggested. The silicon sludge consisted of Si, SiC, machine oil, and metallic impurities. The oil and metal impurities was removed by mechanical separation. The Si-SiC mixture was converted to silicon chloride by chlorine roasting at $1000^{\circ}C$ for 1 hr and the silicon chloride was dissolved into an ionic liquid of $[Bmpy]Tf_2N$ as an electrolyte. Cyclic voltammetry results showed an wide voltage window of pure $[Bmpy]Tf_2N$ and a reduction peak of elemental Si from $[Bmpy]Tf_2N$ dissolved $SiCl_4$ on Au electrode, respectively. The silicon deposits could be prepared on the Au electrode by the potentiostatic electrolysis of -1.9 V vs. Pt-QRE. The elemental silicon uniformly electrodeposited was confirmed by various analytical techniques including XRD, FE-SEM with EDS, and XPS. Any impurity was not detected except trace oxygen contaminated during handling for analysis.

• The Journal of the Korea Contents Association
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• v.14 no.5
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• pp.524-540
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• 2014

The purpose of this study was to analyze effect young children's temperament and teacher-child relationship on child's leadership. Subject were 3~5 years old 333 kindergarten young children. young children's parents answered young children's temperament questionnaire. young children's teacher answered young children's temperament and teacher-child relationship questionnaire. The research tools used in this study were the questionnaire for assessment scale of young children's temperament, teacher-child relationship and young children's leadership. To analyze effect young children's temperament and teacher-child relationship on young children's leadership, questionnaires were reconstruted from existing questionnaires. Using SPSS statistics 20 for window program, Scheff$\acute{e}$ verification, pearson product moment correlation, mutiple regression analysis, tolerance, variance inflation factor and VIF were used to analyze the data. Results of this study are summarized as follows: In child's temperament, regularity, in teacher-child relationship, closerelationship, in young children's leadership, goal achivement competence were appeared most high. In young children's temperament, adaptabilituy and durability effected on child's leadership positively. In teacher-child relationship, closerelationship and dependency relationship effected on young children's leadership positively.