• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.192-197
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• 1999

Programmers who write distributed programs are faced with a dilemma when writing the systems communication code. If the code is written by hand or partly by hand, then the speed of the application may be maximized, but the human effort required to implement and maintain the system is greatly increased. On the other hand, if the code is generated using a CORBA IDL compiler then the programmer effort will be reduced, but the performance of the application may be poor. So we need the optimizing the code generated by CORBA IDL compiler. We introduce the techniques which have been used by typical programming languages into compilation of IDL. We separate the phase of compilation into three phase. The first phase parses interface definition in IDL, manages nested scope and generates AST(Abstract Syntax Tree). The second phase implements the optimization. The third phase generates the code in target language. In this paper, we focus on the first phase. We separate interface definition into interface and message representation from AST. This supports the separate optimization of code in second phase.

• Korean Journal of Cognitive Science
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• v.21 no.1
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• pp.157-175
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• 2010

Understanding dialogue participant's emotion is important as well as decoding the explicit message in human communication. It is well known that non-verbal elements are more suitable for conveying speaker's emotions than verbal elements. Written texts, however, contain a variety of linguistic units that express emotions. This study aims at analyzing components for constructing an emotion ontology, that provides us with numerous applications in Human Language Technology. A majority of the previous work in text-based emotion processing focused on the classification of emotions, the construction of a dictionary describing emotion, and the retrieval of those lexica in texts through keyword spotting and/or syntactic parsing techniques. The retrieved or computed emotions based on that process did not show good results in terms of accuracy. Thus, more sophisticate components analysis is proposed and the linguistic factors are introduced in this study. (1) 5 linguistic types of emotion expressions are differentiated in terms of target (verbal/non-verbal) and the method (expressive/descriptive/iconic). The correlations among them as well as their correlation with the non-verbal expressive type are also determined. This characteristic is expected to guarantees more adaptability to our ontology in multi-modal environments. (2) As emotion-related components, this study proposes 24 emotion types, the 5-scale intensity (-2~+2), and the 3-scale polarity (positive/negative/neutral) which can describe a variety of emotions in more detail and in standardized way. (3) We introduce verbal expression-related components, such as 'experiencer', 'description target', 'description method' and 'linguistic features', which can classify and tag appropriately verbal expressions of emotions. (4) Adopting the linguistic tag sets proposed by ISO and TEI and providing the mapping table between our classification of emotions and Plutchik's, our ontology can be easily employed for multilingual processing.

• The KIPS Transactions:PartC
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• v.15C no.3
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• pp.149-156
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• 2008

JPEG2000 is the upcoming image coding standard that provides better compression rate and image quality compared with JPEG. Lazy-mode steganography guarantees the safe communication under the two information loss stages in JPEG2000. However, it causes the severe changes of the code-block noise variance sequence after embedding and that is detectable under the steganalysis using the Hilbert-Huang transform (HHT) based sequential analysis. In this paper, a JPEG2000 lazy-mode steganography method is presented. The code blocks which produce the sudden variation of the noise variance after embedding are estimated by calculating low precision code-block variance (LPV) and low precision code-block noise variance (LPNV). By avoiding those code-blocks from embedding, our algorithm preserves the sequence and makes stego images secure under the HHT-based steganalytic detection. In addition, it prevents a severe degradation of image quality by using JPEG2000 quality layer information. On various 2048 images, experiments are performed to show the effective reduction of the noise variation after message embedding and the stable performance against HHT-based steganalysis.

• Journal of Korean Academy of Nursing
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• v.26 no.1
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• pp.94-106
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• 1996

Nursing literature suggests that the self-concept of nurses gives an important implications to educators and administrators as well as clinicians for their professional development. With a view to exploring how nurses view themselves, the Professional Self-Concept of Nurses Instrument (PSCNI) using 27 Likert items was developed by Arthur in Australia in 1990. This study is an extension of the PSCNI using Korean samples with some modifications. A convenience sample was drawn from 800 nurses working in three university hospitals in Seoul ; three university hospitals in Kyonggi-do and a university hospital and a psychiatric hospital in Kangwon-do. Seven hundred questionnaires were analyzed using the statistical analysis system(SAS). The reliability of the scale was tested by test-retest and Cronbach's alpha. Differences in the PSCNI, which are closely related to demographic variables, were examined by t-test, ANOVA and the Duncan's multiple range test. Factor analysis was employed so as to examine component factors. The results are summarized as follows : 1. The test-retest reliability of the PSCNI was .79 and Cronbach's alpha was .85. Item correlations with total revealed consistent correlations and subscale reliability varied from .49 to .85. 2. The average score of PSCNI was 75.21 and average item score was 2.79. 3. Twenty four items were derived from the PSCNI 27 items and these items clustered in three component factors. The cumulative percent of variance was 38.12％ and for factor 1 was 22.81％, for factor 2, 9.79％ and for factor 3, 5.51％ respectively 4. A comparison of the scores for the dimensions of the PSCNI shows a relative difference in terms of mean item scores and in descending order, professional practice（m=2.83）, communication （m=2.82） and satisfaction（m=2.70）. 5. Professional self-concept of nurses was found to vary significantly according to age（P=.0001）, religion（P=.0001）, academic background（P= .0109）, marital status（P=.0001）, career（P= .0001） and position（P=.0001）. In conclusion, there was a correlation between professional self-concept of nurses, and life and work variables. This study provides an important message for administrators and nurse educators by highlighting factors which can be addressed by education programs, staff development and appraisal. While the test results largely confirm the Australian and Canadian tests, further research is necessary to improve the cumulative percent of variance instead of applying Arthur's PSCNI directly to Korean nurses.

• Journal of Digital Convergence
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• v.16 no.3
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• pp.429-438
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• 2018

Brad Bird, a screenwriter and animation director in the United States, criticized the situation in which most animations were produced and released for the children since the early 2000s. He said that animation is an art form capable of conveying messages not only to children but also to adults, and that their development potential is high. In this study, I analyzed overall components such as narrative structure, character, subplot, symbol, and foreshadow of Brad Bird's animated feature films , , and examined his narrative features and strategies. As a result, the narrative features of animation as an art form are as follows: First, conveying the message of a serious subject that will deeply sympathize with adults as well as children. Second, expressing the social agenda which criticizes the contradiction of the real world and the periodic mistakes. Third, solid narrative structure through a dense plot based on realistic situation setting. I hope that this study will be used as basic research material for various animation production in the future.

• Journal of Digital Convergence
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• v.15 no.10
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• pp.411-417
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• 2017

This experimental research explores the effect of background music of TV documentary which can be classified as channel factor in the field of media effect, on audience's recall memory, flow, arousal of interest, evaluation of documentary. Most previous researches of media effect focused on the effect of sender factor and message factor on audience's memory, understanding, acquirement of knowledge, attitude, action. However the number of researches on the effect of background music on audience's various dependent variables is extremely limited, especially it is very difficult to find studies on the effect of background music of TV documentary on audience. Therefore this research tries to find the effect of background music of TV documentary on audience's recall memory, flow, arousal of interest, evaluation. For this research of experiment, 2 groups of subjects composed of 101 university students were exposed to 2 different video clips of TV documentary, one with background music, the other without it, After this experiment, Questions which were designed to measure audience's recall memory, flow, arousal of interest, evaluation were asked and analysed. This research found that background music of TV documentary increased audience's flow, degree of interest and raised evaluation, However meaningful effect of background music on audience's recall memory was not found.

• Journal of Digital Convergence
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• v.15 no.10
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• pp.93-101
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• 2017

This study investigate the effect of each type of search volume on the number of Facebook fans and the number of tourists. According to the hierarchy effect model, the effect of communication appears to be the sequentiality of cognition-attitude-behavior. Applying this theory, this study predicted that when consumers who have higher involvement and knowledge on specific cities through search behavior, they will be more active in information search through Facebook fan page subscription and will lead to direct tourism behavior. To verify the prediction, we examined the influences among search volume of Seoul shown in Google Trend, the number of fans of official facebook page named 'Seoul Korea', and the number of foreign tourists. As a result, the type of search keyword was divided into four categories: tourism attraction keyword, natural environment keyword, symbolic keyword, and accessibility keyword. The regression analysis showed that tourism attraction keyword and symbolic keyword have influence on Facebook fanpage 'Like'. In addition, facebook fanpage fan size have mediation effect between search volume and number of tourists. All in all, it would be useful to appeal to foreign tourists with a message that emphasizes tourism attraction and Korea-related contents.

• Journal of IKEEE
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• v.2 no.1 s.2
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• pp.122-133
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• 1998

The CL network fer CBDS(Connectionless Broadband Data Service) defined by ITU-(International Telecommunication Union-Telecommunication) consists of CL(ConnectionLess) servers which route frames and links which connect between CL user and CL server or between CL servers[1][2]. In this configuration, two kinds of congestion, CL link congestion and CL server congestion may occur. Therefore this paper has proposed the scheme that can deal with the above congestion state of LAN traffic efficiently in interworking LANs in ATM network. Proposed schemes ale link-by-link scheme and hybrid scheme. Link-by-link scheme uses the ABR feedback loops of AIM layer between CL user and CL server or between CL servers, and the header translation table carrying out the routing function of frame. And hybrid scheme is the scheme that adds end-to-end loop to link-by-link scheme and then uses RM message using CLNAP-PDU(ConnectionLess Network Access Protocol - Protocol Data Units) of CL layer. These schemes can be implemented easily because of using the ABR loop of ATM layer, end-to-end loop of CL layer, and the routing function of CL server. In this paper the characteristic and effects of two schemes in CL server bas been compared and analyzed.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.1
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• pp.39-47
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• 2005

The range of hardware implementation increases in communication systems as high-speed processing is required for high data rate. In the broadband wireless access (BWA) system based on IEEE standard 802.16 the functions of higher part in the MAC layer to Provide data needed for generating MAC PDU are implemented in software, and the tasks from formatting MAC PDUs by using those data to transmitting the messages in a modem are implemented in hardware. In this paper, the interface hardware for efficient message exchange between MAC and PHY layers in the BWA system is designed. The hardware performs the following functions including those of the transmission convergence(TC) sublayer; (1) formatting TC PDU(Protocol data unit) from/to MAC PDU, (2) Reed-solomon(RS) encoding/decoding, and (3) resolving DL MAP and UL MAP, so that it controls transmission slot and uplink and downlink traffic according to the modulation scheme of burst profile. Also, it provides various control signal for PHY modem. In addition, the truncated binary exponential backoff (TBEB) algorithm is implemented in a subscriber station to avoid collision on contention-based transmission of messages. The VLSI architecture performing all these functions is implemented and verified in VHDL.

• Journal of Korean Society of Transportation
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• v.22 no.7 s.78
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• pp.91-98
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• 2004

This study focuses on the development of dynamic assignment for evaluation and application for dynamic route guidance strategy. Travelers are classified according to information contents which they received pre/on trip. The first group have no traffic information, so they travel with fixed route. The second group have real-time shortest path and travel according to it. The last group have car navigation system or individual method(cellular phone, PDA-two way communication available) for traffic information on trip. And then they are assigned in accordance with the proposed multiclass dynamic assignment model. At this time the last group is gotten under control with DFS(decentralized feedback strategy). In use of this Process we expect that various traffic information strategy can be tested and also be the key factor for success of ITS, location of VMS(variable message sign), cycle of information, area of traffic information, etc).