• The Journal of the Korea Contents Association
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• v.18 no.3
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• pp.472-485
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• 2018

The purpose of this study is to analyze debt zeroing policy process of Yong-in city based on the Kingdon's Multiple Stream Framework in order to contribute to strengthening financial capacity and competitiveness of local governments. This study focused on the Yong-in case because the city had a local debt of about KRW 800 billion as of 2012, but it completed the debt repayment in early 2017. The results are as follows. First, policy problem streams are the perception of Yongin City's debt indicator, the failure of the LRT project, and the failure of sale of buildinglots of Yukbuk district. Second, in the political stream, there have been the election of new governors, cooperation of local administration and citizens like budget cut. Third, policy alternative streams are the reduction of large-scale investment projects, the expansion of revenues through the sale of idle shared properties, the increase of tax revenues, and the activation of light rail. As the each streams flowed independently, the window of policy change opened by the revitalization of the real estate market and the sale of buildinglots of Yukbuk distric and combined with other policy factors such as the activation of the light rail. In this process, the role of the policy entrepreneurs such as negotiation and persuasion of the related institutions influenced achieving tight fiscal policy. As a result of this policy output, Yongin City achieved zero debt. This study suggests that it is necessary not only the importance of the role of policy entrepreneurs but also of the administrative and citizen cooperation and the institutional complement such as a large scale of the investment review system.

• Journal of the Korean Vacuum Society
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• v.21 no.1
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• pp.29-35
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• 2012

The Hydrogenated silicon nitride (SiNx:H) using plasma enhanced chemical vapor deposition is widely used in photovoltaic industry as an antireflection coating and passivation layer. In the high temperature firing process, the $SiN_x:H$ film should not change the properties for its use as high quality surface layer in crystalline silicon solar cells. Initially PECVD-$SiN_x:H$ film trends were investigated by varying the deposition parameters (temperature, electrode gap, RF power, gas flow rate etc.) to optimize the process parameter conditions. Then by varying gas ratios ($NH_3/SiH_4$), the hydrogenated silicon nitride films were analyzed for its optical, electrical, chemical and surface passivation properties. The $SiN_x:H$ films of refractive indices 1.90~2.20 were obtained. The film deposited with the gas ratio of 3.6 (Refractive index=1.98) showed the best properties in after firing process condition. The single crystalline silicon solar cells fabricated according to optimized gas ratio (R=3.6) condition on large area substrate of size $156{\times}156mm$ (Pseudo square) was found to have the conversion efficiency as high as 17.2%. Optimized hydrogenated silicon nitride surface layer and high efficiency crystalline silicon solar cells fabrication sequence has also been explained in this study.

• Journal of the Korea Society of Computer and Information
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• v.17 no.1
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• pp.31-40
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• 2012

u-GIS DSMSs have been researched to deal with various sensor data from GeoSensors in ubiquitous environment. Also, they has been more important for high availability. The data from GeoSensors have some characteristics that increase explosively. This characteristic could lead memory overflow and data loss. To solve the problem, various load shedding methods have been researched. Traditional methods drop the overloaded tuples according to a particular criteria in a single server. Tuple deletion sensitive queries such as aggregation is hard to satisfy accuracy. In this paper a dual processing load shedding method is suggested to improve the accuracy of aggregation in clustering environment. In this method two nodes use replicated stream data for high availability. They process a stream in two nodes by using a characteristic they share stream data. Stream data are synchronized between them with a window as a unit. Then, processed results are merged. We gain improved query accuracy without data loss.

• Journal of Radiation Protection and Research
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• v.37 no.1
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• pp.10-15
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• 2012

Design and performance test results of a newly developed optically stimulated luminescence (OSL) measurement system are presented in this paper. Generally, different types of optical filters are used in OSL reader system to minimize the interference of the stimulation light in the OSL signal. For optically stimulation of $Al_2O_3:C$, we have arrived at an optimal combination of the filters, i.e., GG420 filter for filtering the stimulating light source, and a combined UG11 and BG39 filter at the detecting window (PMT). By using a high luminance blue LED (Luxeon V), sufficient luminous intensity could be obtained for optically stimulation. By using various control boards, the OSL reader device was successfully interfaced with a personal computer. A software was developed to deliver required commands to operate the OSL reader by using the LabView program (National Instruments, Inc.). In order to evaluate the reliability and the reproducibility of newly designed-OSL reader. Performance testing of the OSL reader was carried out for OSL efficiency, OSL decay curve and signal to noise ratio of the standard $Al_2O_3:C$ OSL material. It was found to be comparable with that of commercial Riso reader system.

• The Journal of the Korea Contents Association
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• v.12 no.12
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• pp.223-236
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• 2012

This study's objective is to identify the factors that effect high school students' volunteer activities and suggest the political implications for the actual fulfillment of volunteer activities. We verified the relationships and effects on all factors based on the theory of planned behavior which is applied in explaining various human behavior. 220 high school student subjects for this study were randomly selected and filled out self-administered questionnaires. A total of 216 responses were used for analysis. Data analysis was done by obtaining reliability and validity after frequency analysis using SPSS 12.0 for Windows and AMOS 4.0 as well as evaluating the suitability of the study model. Regression analysis was carried out for hypothesis testing. The study results showed that firstly, all hypotheses based on the theory of planned behavior were supported re-confirming the usefulness of the theory in the field of various behavioral research for social welfare. Secondly, among all factors, perceived behavioral control showed to be the most influential in fulfilling active volunteer activities of high school students. Based on the results of our study, we proposed that research in the social welfare academia, practical endeavors in the educational field, and also political support system is necessary.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.4
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• pp.201-209
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• 2012

The point-based complex event processing handled an instantaneous event by using one time stamp in each event. However, the activity period of the event plays the important role in the field which is the same as the finance, multimedia, medicine, and meteorology. The point-based event is insufficient for expressing the complex temporal relationship in this field. In the application field of the real-time world, the event has the period. The events more than two kinds can be temporally overlapped. In addition, one event can include the other event. The relation about the events of kind of these can not be successive like the point-based event. This thesis designs and implements the method detecting the patterns of the complex event by using the interval-based events. The interval-based events can express the overlapping relation between events. Furthermore, it can include the others. By using the end point of beginning and end point of the termination, the operator of interval-based events shows the interval-based events. It expresses the sequence of the interval-based events and can detect the complex event patterns. This thesis proposes the algorithm using the active instance stack in order to raise efficiency of detection of the complex event patterns. When comprising the event sequence, this thesis applies the window push down technique in order to reduce the number of intermediate results. It raises the utility factor of the running time and memory.

• Journal of Technologic Dentistry
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• v.34 no.4
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• pp.391-402
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• 2012

Purpose: This study was survey on future job vision and its pride (self-esteem) of dental technicians. It also investigates the future vision on their major of job (denture) and its awareness to improve the work environment and enhance their satisfaction towards job and duties. Methods: In order to research job and its duty satisfaction of dental technicians who mainly work at denture part, certified questionnaire was modified and upgraded for its use. Collected documents were used by 'Window SAS 8.0 Program' for analysis. The significance of the test related to the items and its standards has been decided for p<0.05. To find out the differences between choices when choosing career and the duty satisfaction, t-test, one-way ANOVA and two-way ANOVA have been used. Results: Following research findings show: 1. There was high self-esteem towards the job as dental technicians but low in future job vision. 2. It has been found that if satisfaction on their job (dental technician) is high then also their satisfaction on its duty (denture part) is high. 3. The factors that affects mostly on duty satisfaction of denture part are 'the contribution on improving oral cavity of people'(${\beta}$=0.33118), 'The possibility of growth of person's job choices'(${\beta}$=0.30035) and 'person's satisfaction on choosing job'(${\beta}$=0.16069). 4. If there is an increase level on the contribution of improving people's oral cavity, the possibility of growth of person's job choices and the person's satisfaction on choosing job, then there is also high growth in denture part's duty satisfaction. 5. It has been found that if there are more employment histories of denture part, the duty satisfaction of denture part were also high. On the other hand, the more employment history of dental technicians get, the duty satisfaction of their denture part was low. Conclusion: Following research results show that there is high self-esteem towards the job as dental technicians but the vision towards future was low. This shows that there is no bright future on dental technology. Therefore, it is important that not only to improve the work environment and pay rise on dental technologists but also to satisfy them. Various program developments and continuous research are needed to increase satisfaction.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.10
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• pp.111-121
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• 2012

In this paper, a poly-Si thin film transistor with ${\sim}0.5{\mu}m$ gate length was fabricated and its electrical characteristics are optimized. From the results, it was verified that making active region with larger grain size using low temperature annealing is an efficient way to enhance the subthreshold swing, drain-induced barrier lowering and on-current characteristics. A SONOS flash memory was fabricated using this poly-Si channel process and its performances are analyzed. It was necessary to optimize O/N/O thickness for the reduction of electron back tunneling and the enhancement of its memory operation. The optimized device showed 2.24 V of threshold voltage memory windows which coincided with a well operating flash memory.

• The Journal of the Korea Contents Association
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• v.12 no.9
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• pp.408-421
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• 2012

The purpose of this study was to verify differences in changes of physical self-concept between Taekwondo participation group and non Taekwondo participation group in order to meet the needs of the study the limitations of previous studies had to be considered. The participants were elementary students in S city selected by this researcher. 30 students were in the Taekwondo participation group and 40 students were in the non Taekwondo participation group decided by ACSM(15) exercise guide line standard, three times repetition measurements per 12 weeks were executed for $2{\times}3$ mixed design with repeated measure. For this statistic, SPSS 12.0 for windows was used for technical statistic, two-way ANOVA, paired t-test, and independent t-test. The results were as follows; First, there were differences of change pattern in physical self-concept generally between Taekwondo participation group and non Taekwondo participation group. Second, there was a difference between Taekwondo exercise group and non Taekwondo exercise group according to 1st and 2nd, 1st and 3rd measurement point partially. Third, there were differences between the Taekwondo exercise group and non Taekwondo exercise group on the 2nd and 3rd measurement. In conclusion, Taekwondo discipline tended to have a large effect increasing physical self-concept.

• Journal of the Korean Solar Energy Society
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• v.32 no.4
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• pp.24-33
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• 2012

Recently, finishing materials at spandrel area, a part of curtain-wall system, are gradually forced to improve thermal insulation performance in order to enhance the building energy efficiency. Also, Building Integrated Photovoltaics(BIPV) systems have been installed in the exterior side of the spandrel area, which is generally composed of windows. Those BIPVs aim to achieve high building energy efficiency and supply the electricity to building. However, if transparent BIPV module is combined with high insulated spandrel, it would reduce the PV efficiency for two major reasons. First, temperature in the air space, located between window layer and finishing layer of the spandrel area, can significantly increase by solar heat gain, because the space has a few air density relative to other spaces in building. Secondly, PV has a characteristics of decreased Voltage(Voc and Vmp) with the increased temperature on the PV cell. For these reasons, this research analyzed a direct interrelation between PV Cell temperature and electricity generation performance under different insulation conditions in the spandrel area. The different insulation conditions under consideration are 1) high insulated spandrel(HIS) 2) low insulated spandrel(LIS) 3) PV stand alone on the ground(SAG). As a result, in case of 1) HIS, PV temperature was increased and thus electricity generation efficiency was decreased more than other cases. To be specific, each cases' maximum temperature indicated that 1) HIS is $83.8^{\circ}C$, 2) LIS is $74.2^{\circ}C$, and 3) SAG is $66.3^{\circ}C$. Also, each cases yield electricity generation like that 1) HIS is 913.3kWh/kWp, 2) LIS is 942.8kWh/kWp, and 3) SAG is 981.3kWh/kWp. These result showed that it is needed for us to seek to the way how the PV Cell temperature would be decreased.