• Journal of the Korean Society for information Management
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• v.31 no.3
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• pp.331-351
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• 2014

This study analyzed students', parents of student, and school master' survey materials and reading, math, and science knowledge performance based on OECD PISA 2009 Koreana data. Also, school library level variables grasped the impacts of academic achievement. Through this study looked for suggestion to improvement, educational accountability and leverage of school library. The results, first, when they use reading more pleasantly thought, they achieve higher scores in academic performance. Second, when they use more books and reading resources in housekeeping, they achieve higher scores in academic performance. Third, when they were more visits school library for exploit internet, they achieve higher lower scores in academic performance. Fourth, when the member of the staff in the school library are more lack of people, they achieve lower scores in academic performance. Fifth, private education's experience in reading have a negative influence in reading achievement and science achievement. Sixth, school library's visiting and library application study about national language curriculum in the impacts of academic performance would not change statistical evaluation significantly.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.3A
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• pp.237-246
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• 2007

Clock Synchronization is one of the most basic factors to be considered when we implement an indoor synchronization network for indoor positioning. In this paper, we present a new synchronization algorithm which does not employ time stamps in order to reduce the hardware complexity and data overhead. In addition to that, we describe an algorithm that is designed to compensate the frequency drift giving an serious impact on the synchronization performance. The performance evaluation of the proposed algorithm is achieved by investigating MTIE (Maximum Time Interval Error) values through simulations. In the simulations, the frequency drift values of the practical oscillators are used. From the simulation results, it is investigated that we can achieve the synchronization performance under 10 ns when we use 1 second synchronization interval with 1 ns resolution and TCXOs (Tmperature Compensated Cristal Oscillators) both in the master clock and the slave clock.

• Korean Journal of Veterinary Service
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• v.32 no.3
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• pp.265-273
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• 2009

A cross-sectional survey was undertaken to identify risk factors and clinical signs associated with parasitic helminth infections of cattle in Mymensignh district of Bangladesh. A nonrandom convenience sampling method was used to select 138 animals from 40 farmers/herds. The eggs per gram of faeces (epg) for nematodes and trematodes were determined by McMaster and Stoll's methods respectively. Animal-level and herd-level data were recorded by means of a questionnaire. Multi-collinearity amongst explanatory variables were assessed using $2{\times}2{\times}\;X^2$ test and one variable in a pair was dropped if $P{\leq}0.05$ formultiple logistic regression models. Association study between outcome and explanatory variables was conducted using classification tree, random forests and multiple logistic regression. A positive epg was considered as infected. Analyses were performed using $STATA^{(R)}$, version 8.0/Intercooled and $R^{(R)}$, Version 2.3.0. Seventy eight percent of the cattle were found to be infected with at least one type of helminth. Twenty four pairs of combinations of explanatory variables showed significant associations. Male animals (OR=3.3, P=.006, 95% CI=1.4, 7.7) were associated with significantly increased prevalence of nematode infection. Female cattle of the study area are mostly cross-breed, kept indoor, fed relatively good diet and not used for draught purpose. Males are used for draught purpose thereby more exposed to nematode infective stage and provided with relatively poor diet. So stressed male cattle may become more susceptible to nematode infection. All of the three statistical techniques selected gender and lumen motility as most important variables in association with nematode infection in cattle. The result of this survey can only be extrapolated to the periurban cattle population of traditional management system.

• Journal of the Institute of Electronics and Information Engineers
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• v.54 no.8
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• pp.3-11
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• 2017

Research and development are being conducted to apply low-power Bluetooth (BLE) technology to IoT (Internet of Things) applications. The characteristic of this application environment is that many piconets can operate in the same space. Therefore, interference between homogeneous networks is likely to occur. In the BLE data channel, adaptive frequency hopping (AFH) scheme is used among the 37 frequency channels, and the master and the slave communicate while changing the carrier frequency. If there are multiple BLE piconets in the same space, there is a risk of frequency collision and packet errors will occur. In this paper, we analyze the packet collision probability due to cochannel interference in multiple asynchronous BLE piconet environments. Specifically, we analyzed packet collision probability according to the number of concurrently operating BLE piconets with the ratio of connection interval to connection event length as the main parameters. The analysis result can be used to set connection event related parameters for a desired packet collision probability according to the number of users having BLE devices in a given space.

• Journal of the Korea Fashion and Costume Design Association
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• v.5 no.1
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• pp.97-107
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• 2003

This study was conducted to provide the basic data to activate the consigned education of fashion retailing company in the department of fashion design in a junior college. 36 consigned education students from fashion retailing company in Daegu were surveyed and interviewed. The result can be summarized as follows: 1. Their motives of study lie in ‘I wanted to study in a junior college’ (55.6%), ‘It would be some help for my job’. ‘My company recommended’ (16.7%), and ‘I wanted to get a higher degree’ (11.1%). 2. Their preferences in terms of major and subjects lie in ‘fashion marketing’ (30.6%), ‘fashion coordination’ (25.0%), and ‘fashion information’ (19.4%). 3. The occupations they wanted to get are ‘a displayer’ (38.9%), and ‘a shop master’ (30.6%), and ‘a merchandiser’ (8.3%). 4. The ratio of theories to practices they want is ‘40:60ㆍ30:70’ (27.8%), ‘50:50’ (22.2%), ‘20:80’ (11.1%) 5. With regard to their adaptability in school, they answered that ‘I'm doing quite well’ (44.4%), ‘I'm doing OK’. ‘It's a little hard to follow’ (22.2%) 6. About teaching methods and contents, they responded that they want ‘more emphasis on practices’ (41.7%), and they commented that ‘teachers are focused on the syllabus procedure rather than students’ practical improvement’ (19.4%), and ‘I feel loaded with too much assignment’ (13.9%) 7. They wanted to be taught by ‘professors’ (77.8%) and ‘professionals in the field’ (19.4%) In conclusion, it is required that both the college and the company need to develop a customized education program focusing on the field training specialized by their cooperation and constant researches. On the part of junior colleges, adjusting their educational directions to the trend of the 21st century, they need to focus on nurturing the consigned students to be highly qualified professionals required by the industry, using hi-tee equipment and facilities through academic and industrial cooperation.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.6
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• pp.124-131
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• 2014

This paper describes a design of an adaptive baseband modem based on TDMA(time division multiple access) with a relay protocol function for wireless personal area networks. The designed baseband modem is controlled by a master synchronization signal and can be configured a relay network up to 14 hops. For efficient data relay communications, the internal buffer design is optimized by implementing a priority memory bus controller to a single port memory. And the priority memory bus controller is also designed to minimize the number of synthesized logic gates. To implement the synchronization function of the narrowband TDMA relay communication, the number of gates has been reduced by dividing the frame synchronization circuits and the network slot synchronization circuits. By using these methods, the number of gates are used about 37%(34,000 gates) on Xilinx FPGA XC6SLX9 which has 90,000 gates. For the 1024-bit frame size with a 32-bit synchronization word, the communication reception rate is 96.4%. The measured maximum transmission delay of the designed baseband modem is 230.4 msec for the 14-hop relay communication.

• The Journal of Advanced Prosthodontics
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• v.10 no.4
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• pp.265-270
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• 2018

PURPOSE. The purpose of this in vitro study was to evaluate the accuracy of a new implant impression technique using bite impression coping and a dual arch tray. MATERIALS AND METHODS. Two implant fixtures were placed on maxillary left second premolar and first molar area in dentoform model. The model with two fixtures was used as the reference. The impression was divided into 2 groups, n=10 each. In group 1, heavy/light body silicone impression was made with pick up impression copings and open tray. In group 2, putty/light body silicone impression was made with bite impression copings and dual arch tray. The reference model and the master casts with implant scan bodies were scanned by a laboratory scanner. Surface tessellation language (STL) datasets from test groups was superimposed with STL dataset of reference model using inspection software. The three-dimensional deviation between the reference model and impression models was calculated and illustrated as a color-map. Data was analyzed by independent samples T-test of variance at ${\alpha}=.05$. RESULTS. The mean 3D implant deviations of pick up impression group (group 1) and dual arch impression group (group 2) were 0.029 mm and 0.034 mm, respectively. The difference in 3D deviations between groups 1 and 2 was not statistically significant (P=.075). CONCLUSION. Within limitations of this study, the accuracy of implant impression using a bite impression coping and dual arch tray is comparable to that of conventional pick-up impression.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.1
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• pp.129-138
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• 2017

The aim of this paper is to suggest methodology for local governments when discovering locally customized future promising industries with regard to policies of central government, regional competencies, and industrial promising. Firstly, key industries by region specified in '5-years regional industrial development master plan(2014)' were utilized. Secondly, science and technology competency by region was calculated with analyzing patent data in each key industries. Thirdly, industrial promising was verified by calculating Knowledge Stock and Activity Index based on measuring industry-IPC linkage. Based on the methodology proposed above, case study(case of Busan city) was done. Finally, 7 core industries and 94 candidates of future promising industries were extracted on the basis of 5 digit of KSIC subdivision. The methodology is expected to contribute local governments to establish evidence-based, efficient, and future-oriented local R&D roadmapping.

• Proceedings of the Korean Society for Bioinformatics Conference
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• 2004.11a
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• pp.265-271
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• 2004

The interaction network of protein -protein plays an important role to understand the various biological functions of cells. Currently, the high -throughput experimental techniques (two -dimensional gel electrophoresis, mass spectroscopy, yeast two -hybrid assay) provide us with the vast amount of data for protein-protein interaction at the proteome scale. In order to recognize the role of each protein in their network, the efficient bioinformatical and computational analysis methods are required. We propose a systematic and mathematical method which can analyze the protein -protein interaction network rigorously and enable us to capture the biological and physical essence of a topological character and stability of protein -protein network, and sensitivity of each protein along the biological pathway of their network. We set up a Laplacian matrix of spectral graph theory based on the protein-protein network of yeast proteome, and perform an eigenvalue analysis and apply a perturbation method on a Laplacian matrix, which result in recognizing the center of protein cluster, the identity of hub proteins around it and their relative sensitivities. Identifying the topology of protein -protein network via a Laplacian matrix, we can recognize the important relation between the biological pathway of yeast proteome and the formalism of master equation. The results of our systematic and mathematical analysis agree well with the experimental findings of yeast proteome. The biological function and meaning of each protein cluster can be explained easily. Our rigorous analysis method is robust for understanding various kinds of networks whether they are biological, social, economical...etc

• Korean Journal of Human Ecology
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• v.9 no.3
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• pp.47-62
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• 2006

The purpose of this study is comparing parenting efficacy, knowledge of infant-care and sensitivity, The subjects of this study were 100 parents having 12-24 monthes old child in the city of Jeonju, Korea. Parenting efficacy was developed by Shin, Suk-Jae(1997) and consisting of 16 questions. The knowledge of infant-care was assessed using Knowledge of Child Development Inventory(KCDI) by Yoon Hyung Ju, which was modified by pedology Professor and 3 graduate school students in master's or doctorate courses. In addition, by using a tool made by Gwon, Mi-Gyeong(1998) centering on the literatures on infant cue in Barnard's NCAST program, the parents' sensitivity of infant cue is investigated. The statistical analysis of the collected data is done with SPSS 10.0, and frequency, percentage, average, standard deviation, t/F test and Pearson's correlation are also used. The results of this study were as following: First, mother's parenting efficacy was higher than father's. There were significant differences in parenting efficacy by eudcational level of mothers. Second, knowledge of infant-care was higher in mothers than fathers. Areas that mothers have knowledge of infant-care in the order of the lowest areas are emotional development, sociality development, physical development and cognitive development. Third, mothers reaction to infant cue is more sensitive and positive than father's. Fourth, There were positive correlations with father's parenting efficacy and knowledge of infant-care on emotional development, and paternal parenting uneasiness has negative correlations with his sociality development and emotional development.Meanwhile, There were positive correlations with mother's parenting efficacy and knowledge of infant-care on emotional development. Maternal parenting efficacy has negative correlations with her knowledge of infant-care on emotional development.