• Journal of the Korean Society for Library and Information Science
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• v.52 no.3
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• pp.61-89
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• 2018

The purpose of this study is to analyze the items related to digital reading and information literacy which were measured by PIAAC and PISA, to examine the measurement contents and methods of these literacy items, and to derive the implications for providing reading and information services for librarians at public libraries and teacher librarians. In order to solve the questions measuring digital reading literacy and digital information literacy, respondents commonly needed ICT skills as well as cognitive strategies. However, in digital reading literacy measurement items, the ability to comprehend and critically think about texts was emphasized. And in digital information literacy measurement items, the ability to use ICT skills, navigate, and evaluate whether or not to read the retrieved text was emphasized. Librarians and teacher librarians need to encourage readers to read and provide a customized competencies improvement program to reflect the performance results and characteristics of a particular group. And It is also necessary to improve and develop the library environment so that library user can understand and use library search system and the Korean decimal classification.

• Journal of Korean Library and Information Science Society
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• v.36 no.1
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• pp.353-370
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• 2005

The purpose of this study aims to provide possible suggestions for the improvement of the korean Decimal Classification System in 21th century through the analysis of history field as the subject of study. As a result of this study, some problems(for example, irrational classification number system, very simplicity of $\lceil$Table of Geographic Areas. Historical Periods. Persons$\rfloor$. improper development of class 900, necessity of some internal tables and $\lceil$Table of Racial, Ethnic, National Groups$\rfloor$, insufficiency of note etc.) were found out. This study can be useful for the future revision of KDC4 because a revolutionary improvement were provided.

• Journal of Korean Library and Information Science Society
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• v.27
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• pp.171-209
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• 1997

The results of the study can be summarized as follows. The Shu-mu Da-wen was selected and compiled by Zhang Zhi Dong at the end of Qing Dynasty as a reading list for students preparing for the state examination and for the purpose of choosing the best from several versions. Whether it was compiled and edited by Zhang was in dispute. But it is almost certain that Zhang was the main editor because Shu-mu Da-wen showed his political, educational and scientific thoughts and knowledge distinctively. The followings are characteristics of Shu-mu Da-wen being compared with Si-ku Quan-shu Zong-mu Ti-yao. 1. In Jing-bu, the Confucian classics are divided into Zheng-jing Zheng-zhu and 'Lie-chao Jing-zhu Jing-shuo Jing-ben kao-zheng. Zheng-shi lei is divided into Zheng-shi fen he ke ben and Zheng-shi zhu bu biao pu kao-zheng. It is the special sorting method to include Du-ben lei in Jing-bu and Chu xue du-ben in Bie-lu in order to provide first learners for reading order. 2. Shi-bu included Gu-shi newly and Di-li lei is divided into Gu Di-li and Jin di-li in Shi-bu. Tian-wen Suan-fa lei is divided into Zhong-fa and Xi-fa in Zi-bu. Zhang distinguished between old books and contemporary ones to find out the origin and include newly published books in the East and the West. 3. Zhou-Qin zhu-zi is newly added to Zi-pu. In Ji-pu, Bie-ji and Zong-ji are categorized according to their style and period respectively. This show the new sorting method which added classifying system concerning academic development. It is the prominent feature in the compiling system to make Bie-lu and Cong-shu respective chapters. With those characteristics the Shu-mu Da-wen had been edited and published several times. It had a wide effect not only on compiling methods of cataloging afterwards and but also on classification systems before decimal classification was introduced in China.

• The KIPS Transactions:PartC
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• v.13C no.7 s.110
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• pp.913-922
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• 2006

It used exclusively the radio communication where is the TRS(Trunked Radio Service) at frequency where the person whom it does is specific with hitherto radio communication method differently frequency of the decimal which is allocated to the relay station it talks the at the room which the multiple user uses with commonness. The TRS system the most big feature is the region multiple group and order communication method. The TRS the composition of system is composed of the multi mind group, the each group is composed of the terminal of the users who have the objective which is similar relates in business contents. With above it follows in same multi objective and the connection of the form which is various or group communication accomplishes and quality case, a possibility a or of having many problem point in key distribution for a large scale communication there is it could be exposed to attack of the form which is various. There is a place where it accomplishes the communication which is safe at the TRS from research which it sees it investigates group key distribution method which is an essential element. The method which it sees when it reduces a communication frequency, it stands but is the user, it proposes the efficient group key distribution method it will be able to accomplish.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.3
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• pp.570-576
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• 2004

In this paper, we design the IFFT/FFT (Inverse fast Fourier Transform/Fast Fourier Transform) modules for IEEE 802.11a-1999, which is a standard of the High-speed Wireless LAN using the OFDM (Orthogonal Frequency Division Multiplexing). The designed IFFT/FFT is the 64-point FFT to be compatible with IEEE 802.11a and the pipelined architecture which needs neither serial-to-parallel nor parallel-to-serial converter. We compare four types of IFFT/FFT modules for the hardware complexity and operation : R22SDF (Radix-2 Single-path Delay feedback), the R2SDF (Radix-2 Single-path Delay feedback), R2SDF (Radix-4 Single-path Delay Feedback), and R4SDC (Radix-4 Single-path Delay Commutator). In order to minimize the error, we design the IFFT/FFT module to operate with additional decimal parts after butterfly operation. In case of the R22SDF, the IFFT/FFT module has 44,747 gate counts excluding RAMs and the minimized error rate as compared with other types. And we know that the R22SDF has a small hardware structure as compared with other types.

• Journal for History of Mathematics
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• v.5 no.1
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• pp.81-95
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• 1988

In Akhakkyebom, one of the greatest Korean Sources, a great mistake was found in the lengths of the pitch pipes. Whanjong from which the other eleven pitches are calculated, is nine inches by decimal system. But the rest are from 9inches by nonary system. To find out how such a contradictory combination could put into so great a book, all the sources available wereexamined. In the process of investigating the numeral change of the lengths of the pitchpipes, it was found that fixation of this contradictory combination was due to the tradiction of Confucianism, which is specialized by its adherence of the old. SongHyon couldn't understand well enough Tsai Yuan-ting's Account of the science of the pitch pipes in Lu-luhsin-shui, Neither could Yi Hye-gu who translated Akhakkwebom into Korean. The parts they misunderstood were pointed out and explained as it should be in this thesis. Several other accounts of the science of the pitch pipes like Chu Tsai-yu's and Jing Farng's are also explained. The Pitch-pipes which were said to have been made by Pak Yon were found out to be of Chu Tsai-yu's. Those which Yi Sang dok wrote were one of Pak Yon's achievements turned out to be of Tsai Yuen-ting's, And othe interesting mistakes were pointed out in thesis thesis. Most of these mistakes were made, I think, because of the lack of the study on the historical background. That's why I tried to examine all the sources available on pitch-pipes. In the lengths of the pitch-pipes preserved in Shih-chi by Ssu-ma Ch'ien, several letters were found to have been misprinted. Some chil's should be “sip” and the letter “il” in Hyopchong should be “chil”. I couldn't deal with all the lengths of the pitch-pipes in this thesis. Especially the real length of the old measure of Whangjong made by PakYon is remained still unknown. I believe a lot more study should be poured on this field to know our traditional music as it was.

• Journal of the Korean Society of Costume
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• v.16
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• pp.111-123
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• 1991

We suppose that Poback-cheok appeared with wearing clothes in the ancient times. At first, man used body as a scale, and it is gradually diversified with social development. It is clear that also in the time of Shilla-Dynasty, the United Shilla-Dynasty and the Goryeo-Dynasty, the system of degree existed in historical relation to that of China. But we don't know it's real length, because there is no recording until the beginning of the Yi-Dynasty. The first recording about Poback-cheok appeared in the time of the King Sejong. Hwangjong-Cheok which is a original vessel of the degree system appears in the 7th years of the King Sejong. In the 12th years of the King Sejong, Ju-cheok, Youngjo-cheok and Joyegi-cheok appeared. In the 13th years of the King Sejong, Poback-cheok appeared as a new changed one. At that time, the length of Poback-cheok is recorded as 44.75cm in chapter of Oye and Jonsoo Pobaek-cheok is recorded as 46.73cm in Jeonjesangjeongso's picture, and it is recorded as 46.80cm in the Kyunggugdaijeon. The scale system is put in good order in the time of King Sejong. But it is confused by the war of 1636 after King Seonjo period. In the 26 th year of King Youngjo, it is reappeared as one of the King Sejong, and it is fixed as 46.80cm. The length is used until the proclamation in the 6th years of the Kwangmu(1902), and then the length of Pobaek-cheok is changed as 48.48 cm, that is measured by a Gok-cheok. After that time, the scale system is very confused during the introduction of new civilization and the Korean-Japanes Unit. So it is used longer or shorter(that is, 49.24cm or 48.91cm). And the metric system is introduced by Japanes in 1926, and it reached the present time. According to use, the actual thing with is used in the end of the Yi-Dynasty is various from 30cm to 70cm. And according to material and craft-man, it can be devided into Hwa-gag scale, Najeon-blacklacquer-scale, bamboo-scale, wooden-scale. The way of expression of measure is always followed by the decimal system. The other half part, except the part of expression of graduation, is put on decorate with a pattern. Also we can see the idea of living on this point.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.2C
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• pp.170-183
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• 2002

This paper proposes an efficient frequency and symbol synchronization structure which could solve problems of the conventional methods to implement DVB-T receive modem which adopted OFDM transmission method. The main considerations of frequency synchronization algorithms are that the frequency tracking performance is not stable enough, and lots of symbols are required, especially when the decimal part of normalized frequency offset (which original frequency offset is divided by the subcarrier spacing) is around $\pm$0.5 to solve these problems, we propose an efficient frequency offset is divided by the subcarrier spacing) is around $\pm$0.5 by using the average of coarse synchronization over several symbol. Also, we suggest a new symbol synchronization structure which is easy to implement without performance degradation in multipath fading channel with only coarse symbol synchronization by making window offset to the range of guard interval in contrast to the conventional structure of dividing symbol synchronization in fine and coarse mode during synchronization. By extensive simulation, we have shown the superiority of the proposed schemes.

• Journal of Korean Library and Information Science Society
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• v.34 no.2
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• pp.143-161
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• 2003

This study intends to analyze the library classification of agriculture in DDC, from the Int edition to the 21th edition. Since Dewey Decimal Classification(DDC) was the first published in 1876, number of total items increased significantly a newly-organized and subdivision of them in the 8th, 10th and 12th edition. According as the discipline developed and was specialized, the agricultural division in DDC was fractionized, and new subjects were continuously added to it. After that time the first edition, the major changes arranged an class and order in the 15th and 17th edition. That is to say, ‘Farm economics’ in 631.1 was relocated to 338.1 in the 17th and ‘Veterinary sciences’ in 619 was relocated to 636.089 in the 15th. Especially, up to now ‘Farm Economics’ deals with an important branch in the science of agriculture. Here the matter of argue heatedly arranges it from economics to agriculture.

• School Mathematics
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• v.10 no.2
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• pp.297-317
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• 2008

This study was designed to gain insight to adopt CAS into secondary level algebra education in Korea. Most inactive usage of calculators in math and most negative effects of calculators on their achievements of Korean students were shown in International studies such as TIMSS-R. A comparative study was carried out with consideration of mathematical backgrounds and technological environments. 8 Korean students and 26 US students in Grade 11 were participated in this study. Subjects' Problem solving process and their strategies of CAS usage in classical Box-problem with CAS were analyzed. CAS helped modeling by providing symbolic manipulation commands and graphs with students' mathematical knowledge. Results indicates that CAS requires shifts focus in algebraic contents: recognition of decimal & algebraic presentations of numbers; linking various presentations, etc. The extent of instrumentation effects on the selection of problem solving strategies among Korea and US students. Instrumentation