• Proceedings of the Korean Society for Bioinformatics Conference
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• 2005.09a
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• pp.72-77
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• 2005

Orthologs are genes having the same function across different species that specialize from a single gene in the last common ancestor of these species. Orthologous groups are useful in the genome annotation, studies on gene evolution, and comparative genomics. However, the construction of an orthologous group is difficult to automate and it takes so much time. It is also hard to guarantee the accuracy of the constructed orthologous groups. We propose a system to construct orthologous groups on many genomes automatically and rapidly. We utilize the grid computing to reduce the sequence alignment time, and we use clustering algorithm in the application of database to automate whole processes. We have generated orthologous groups for 20 complete prokaryotes genomes just in a day because of the grid computing. Furthermore, new genomes can be accommodated easily by the clustering algorithm and grid computing. We compared the generated orthologous groups with COGs (Clusters of orthologous Group of proteins) and KO (KEGG Ortholog). The comparison shows about 85 percent similarity compared with previous well-known orthologous databases.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.1
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• pp.44-51
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• 2004

Fractal-space multiplexing using a moving window(MW) can multiplex holograms by moving a window left and right. and up and down. But, crosstalk occurs by two neighboring moving windows in the vertical direction of the holographic memory system and limits high-density information recording. Accordingly, we analyzed the crosstalk with the focal length of lens, the distance of MW, and the number of multiplexed hologram to record high-density infromation and presented the optical experimental results of fractal-space multiplexing using volumetric photorefractive crystal and disc type photopolymer.

• Journal of Korea Multimedia Society
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• v.17 no.6
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• pp.671-680
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• 2014

Recently, with the remarkable increase of social network services, it is necessary to extract interesting information from lots of data about various individual opinions and preferences on SNS(Social Network Service). The sentiment information can be applied to various fields of society such as politics, public opinions, economics, personal services and entertainments. To extract sentiment information, it is necessary to use processing techniques that store a large amount of SNS data, extract meaningful data from them, and search the sentiment information. This paper proposes an efficient method to extract sentiment information from various unstructured big data on social networks using HDFS(Hadoop Distributed File System) platform and MapReduce functions. In experiments, the proposed method collects and stacks data steadily as the number of data is increased. When the proposed functions are applied to sentiment analysis, the system keeps load balancing and the analysis results are very close to the results of manual work.

• The Transactions of the Korea Information Processing Society
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• v.4 no.3
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• pp.871-879
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• 1997

The comversion of printed maps into computerixed data bases is an enormous rask. Thus the autmaotion of the conversion process is essential. Efficient computer representation of printed maps and line drawings depends on codes assigened to chracaters, symbools, and vestor representation of the graphics. In many cases, maps ard constructed in a number of layers, where each layer is printed in a distinct color, and it represents a subste of the map infromation. In order to properly repressnet road information from color map images, an automatic road extraction algorithm is proposed. Road image is separated from graghics by color segmentation, and then restored by the proposed concurrent conditional dilation operation. The internal and external noise of the road image is eliminated by opening and closing operation. By thining and vectorizing line segments, the desited road information is extracted.

• Journal of Digital Contents Society
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• v.19 no.1
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• pp.149-155
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• 2018

In this paper we propose an algorithm for generating role-performer bipartite matrix for analyzing BPM-based human resource affiliations. Firstly, the proposed algorithm conducts the extraction of role-performer affiliation relationships from ICN(Infromation Contorl Net) based business process models. Then, the role-performer bipartite matrix is constructed in the final step of the algorithm. Conclusively, the bipartite matrix generated through the proposed algorithm ought to be used as the fundamental data structure for discovering the role-performer affiliation networking knowledge, and by using a variety of social network analysis techniques it enables us to acquire valuable analysis results about BPM-based human resource affiliations.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.6
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• pp.724-729
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• 2011

Information retrieval is a method to search the needed data by users. Generally, when a user searches some data in the large scale data set like the internet, ranking-based search is widely used because it is not easy to find the exactly needed data at once. In this paper, we propose a novel ranking-based search method based on sequence and adjacency relationship of user query by the help of TF-IDF and n-gram. As a result, it was possible to find the needed data more accurately with 73% accuracy in more than 19,000 data set.

• Journal of the Korean Institute of Navigation
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• v.3 no.1
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• pp.47-77
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• 1979

A microwave Navigational Aid system is suggested suitable for fishing boats too small to be equipped with Radar or Radio-Direction-Finder. The system proposed here is similar to that of Talking-Beacon developed in Japan, but the distinctive modification proposed is that an increase of sixteen times in peak transmitting power, thus an accompanying increase of coverage, is achieved with the same mean transmitting power as that of Japan without sacrificing the clearness of azimuth information, by adopting a pulse repetition modulation instead of pulse width modulation as in Japan system. An experimental land station transmitter of transmitting frequency of 9, 370MHz and of peak power of 35kw with a microwave beam of 1 degree in horizontal width and 7 degrees in vertical width rotating once every three minutes, and also an experimental receiver of 20-dB in sensitivity and of an assumed cost of 100 dollars, operated by a 12 volts battery source are made, and the sail test results are reported showing that a bearing infromation of an accuracy of within two degrees can be obtainable every three minutes at a distance of as far as 24 miles from the transmitter if the transmitter is located as high as 100 meters above sea-level.

• The Transactions of the Korea Information Processing Society
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• v.4 no.4
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• pp.1089-1099
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• 1997

The Q.2931 protocol describes the point-to-point basic call/connection controal at user-network interface(UNI) and is the core part of the Signalling Capability Set 2 step 1 (CS 2.1) of B-ISDN in ITU-T.The adtivities on CS 2.1 is also under study in korea and categorized as the first stage.The Q.2931 protocol should be applied to various devices with cinsistency especially among network divices.But , It is hard to inmplement this protocol into a de-vice with cinsistency because this protocol has so many optious.Especially, the divice that charges for network foles must takes into account of various considerations.In this paper, we focused our study on the optional in-formantion elments of the Q.2931, and would like ot redefine the chracteristics of optional information elements for the point of the national boundary and proposed some common actions to the devies with network role.

• Journal of KIBIM
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• v.2 no.1
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• pp.18-26
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• 2012

This paper showed how to apply BIM technology to customized interior design process(CIDP) in order to reduce the heavy workload of stakeholders who are involved in the customized house project. Recently the customers wanted their living space to make a different from others in the field of interior design in particular, therefore, this dissertation focused on the process of the determination of the interior plan through the communication between clients and workers. This thesis indicated the interior design process with IDEF${\emptyset}$ in order to show how many kinds of information workers and expected residents made and shared in the each step of CIDP. BIM in the customized interior design procss is useful to correct drawing errors, help customers' decision-making by showing the 3D model for their own house and decrease the heavy workload of workers concerned by using BIM estimating system.

• Journal of The Korean Association For Science Education
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• v.11 no.2
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• pp.143-159
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• 1991

The purpose of this study is to develop a data base system for the infromation on research and development of science education. As a part of this development, an analysis of master's theses and doctoral dissertations from the Department of Science Education, Seoul National University was done, and using authors' classification system for the research and development materials of science education, those theses were classified. From the analysis and classification, the following conclusion was drawn: 1) The Department of Science Education, Seoul National University had produced 468 masters of education for about 30 years. Among them, only 107 theses were on the science education and the other 361 theses on the pure science. This means that department has not taken root as a department of science education. If it does not carry out its own purpose of establishment, it will not be able to justify its existence any longer 2) As compared to the increased number of students applying for the doctoral program, the number of faculty is very few in the field of science education. Without more supplement of the faculty member majored science education, there will be increased conflict and disorder among faculty and students. 3) The proportion of the theses on science education to those on science vanes greatly by the major of the department. This is the mirror of the faculty attitude to and recognition of science education and the faculty composition. 4) The classification of master theses and doctoral dissertations on science education showed that most of them focused on the secondary school science education and were survey studies. But recently it is noticeable that the theme of the study became diversified and has kept in step with the international research trends.