• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.11
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• pp.5208-5213
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• 2011

In this paper, we proposed a new direction finding(DF) technology using TDOA(time-difference of arrival) and PDOA(phase difference of arriving signal) method. The proposed technology has a good DF accuracy without DF ambiguity. TDOA or PDOA technology is used to the most of intelligence systems in 21 century. The principle of TDOA is to receive a signal with two parallel antennas, measure the time difference of arrival signal, and converse the time difference to the direction of incident signal. Those technology make a DF system small size but the DF accuracy is low into short antenna installation distance. The principle of PDOA is similar to TDOA except measuring the phase difference of arrival signal, These technology get a good DF accuracy in short antenna installation distance but have a DF ambiguity. The proposed DF method is simulated into DF system operation environment with noise, and has a good DF accuracy.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.16 no.2
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• pp.183-195
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• 2003

In this study, the method of the finite element modeling for free vibration control of beam-type smart structures with bonded plate-type piezoelectric sensors and actuators is proposed. Constitutive equations for the direct piezoelectric effect and converse piezoelectric effect of piezoelectric materials are considered. By using the variational principle, the equations of motion for the smart beam finite element are derived. The proposed 2-node beam finite element is an isoparametric element based on Timoshenko beam theory. Therefore, by analyzing beam-type smart structures with smart beam finite elements, it is possible to simulate the control of the structural behavior by applying voltages to piezoelectric actuators and monitoring of the structural behavior by sensing voltages of piezoelectric sensors. By using the smart beam finite element and constant-gain feed back control scheme, the formulation of the free nitration control for the beam structures with bonded plate-tyPe Piezoelectric sensors and actuators is proposed.

• The Transactions of the Korean Institute of Power Electronics
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• v.10 no.5
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• pp.481-487
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• 2005

Proposed induction-heated system is innovative system which applied special high-frequency power circuit technique for thermal converse technique and IH(Induction-Heating) magnetic induction heating generated from induction-heated metallic package that is for distillation unit. In this occurs not burning, so that the working environment can be improved. This electromagnetic induction heating technique is used high frequency inverter, By using high frequency inverter high frequency alternative current in the range of [kHz] can be made with conventional alternative current. In this contribution IGBT module is used for high frequency inverter. This paper proposes new fluid heating method. Which is operated as follows. Working coil, which is wrapped outside of pipeline, makes the eddy current. Inside of heating vessel in isolated pipeline the specially designed stainless metallic package is inserted, which can be heated by eddy current losses. And then In this paper are discussed action analysis and characteristics analysis of 5[kW] class full-bridge resonant inverter system and resonant metallic package. In addition, by using this system, how high-efficiency heater is developed and application of system are also discussed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.4
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• pp.614-623
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• 1994

Synthesizing speech and facial images is necessary for human interface that man and machine converse naturally as human do. The target of this paper is synthesizing the facial images. In synthesis of the facial images a three-dimensional (3-D) shape model of the face is used for realizating the facial expression variations and the lip shape variations. The various facial expressions and lip shapes harmonized with the syllables are synthesized by deforming the three-dimensional model on the basis of the facial muscular actions. Combications with the consonants and the vowels make 14.364 syllables. The vowels dominate most lip shapes but the consonants do a part of them. For determining the lip shapes, this paper investigates all the syllables and classifies the lip shapes pattern according to the vowels and the consonants. As the results, the lip shapes are classified into 8 patterns for the vowels and 2patterns for the consonants. In advance, the paper determines the synthesis rules for the classified lip shape patterns. This method permits us to obtain the natural facial image with the various facial expressions and lip shape patterns.

• Journal of Korean Academy of Nursing
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• v.30 no.1
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• pp.7-17
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• 2000

The purpose of this study is to affect health improvement of adolescent, to understand behavioral causes follow adolescent's drug abuse, to understand recovery and rehabilitaton process of adolescent drug abuser. The data are collected through open questionnaire and interview of 25 adolescents from the experienced drug abuse 16 students(male 8, female 8) in two vocational high schools and admissing adolescents 9 person in Alcohol-Drug Addiction Care Centre in Seoul from June 28th to August 31st, 1994. The collected data are arranged and explained through categorizing method stated contents about motives, causes, experiences and effected behaviors for using the drugs of drug abuser adolescents. DRUG USING MOTIVATION They are almost first son and daughter in their family. In their conversation person, male converses to their mother well, but female does not converse to their parents include family. Both groups respond positively to companionship and attitude to other, but negatively to self-confidence and actualizing attitude. They hope always peace of family and want to do their best for their life. In school group, hard and difficult things are school life and family problems, also using the drugs for resolving the them. About drug using behaviors, male responds to bad habbit and shamfull, but female is unconcerned with drug using attitude. The first background of drug using, male gets to use because of curiosity and to be induced from friends or seniors, but female gets to use for feminine beauty(thin body) and escape from reality. Used the drugs, male uses frequently Bond, Butane-Gas among inhalation materials and also marijuana, but female uses various diuretics. The times of drug using, both groups repond to use during the chaging of emotion or filling with stress. The place of drug using, both groups take drugs in vacant houses or in the mountain. The frequency of drug using, they use almost once in a day and they use mostly alone or drug user in friends. Experienced mental changing after drug using, which is fantasy, ecstasy, anxiety and suicidal feeling, and experienced physical changing after drug using, which is elevating sense, headach, abdominal pain, dyspnea and chaging of skin colour and reddish. They coincide with inconvenience feeling due to drug using. RECOVERY AND REHABILITATION PROCESS OF DRUG USING ADOLESCENTS The reason for reforming drug using behavior and attitude, both groups respond to reforming for oneself and social life. The difficult things during the stop to using drugs, all of them responed to family problems, friends problems and temptation and impulse. As for stop to using drug, they need good advise, understandable attitude and family love. But they do not need to be stigmatized, scolding, over protect and ridicule of friends. Also they entreat continuous understanding, advise, concern and the method for resolving stress. For the friends to want to use the drug, they will talk about the stories of their personal experiences and for the friends to stop to using the drug, they will consider for them how to stop. From the theses results, drug users understand personal problems due to drug using, and consider about why to stop and how to stop. Also drug users need to resolve the family problems, personal problems, stress and temptations or impulses. Accordingly this paper suggests that drug users in adolescents need understandable and acceptable atitudes, loving and tenderness, continuous advice and concern, and hopes for life.

• The Korean Journal of Elementary Counseling
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• v.9 no.1
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• pp.59-74
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• 2010

The purpose of this study is to understand traditional values, attitudes, the methods of expression and to develop Korean-style counseling method through the life and philosophy of Yeonam Park Ji Won. This study found the value of counseling in the life and philosophy of Yeonam Park Ji Won and extracted the counseling elements. Finally, this study systematized them as the counselor's good attitude, the counselor's ability for human relationships and the counseling strategy for helping other people. The counselor's attitude which we can learn from Yeonam is to give a deep impression, to converse making other's thought to expand, to initiate other people into the way of enjoying life, to scold for other's desirable change and growth, to use various cautionary topic, to make use of a good sense of humor, to make use of a creative methods, to make other people to mature in their ability. It is meaningful that this study systematized the counselor's good attitude and counseling strategy which are able to be used in modern counseling through the life and philosophy of Yeonam. In the future, it can be developed into more worthy counseling knowledge which can be used in reality through continuous study and verification.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.3 no.3
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• pp.27-37
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• 1983

A method of dynamic analysis is developed for torsional free vibrations of elliptical-box girder type or stiffening truss system suspension bridge. In this study, the method based on a finite element technique using a digital computer, is illustrated by two numerical examples, the Namhae Bridge which is located in Kyungsang nam-do opened on June, 1973, and the Mt. Chunma Bridge is simple span pedestrian's suspension bridge with lateral bracing system in Mt. Chunma, Kyungki-do, are used. In general, dynamic modes of complex suspension bridges are three-dimensional in form, i.e., coupling between vertical and torsional motions. However, introduced that amplitudes of oscillation are infinitesimal for coincidence with the purpose of it's use, thereupon, the torsional vibration analyses are treated without coupling terms. A sufficient number of natural frequencies and mode shapes for torsional free vibration are presented in this paper. In the case of Mt. Chunma Bridge, the natural frequencies and periods are computed with and without reinforcement, respectively, and compared their discrepancies. The influence of the auxiliary reinforcing cables is prevailing in the first few modes, namely, 1st and 2nd in symmetric and 1st, 2nd and 3rd in antisymmetric vibration, and conspicuous in the symmetric compared with the antisymmetric motion, but in the higher modes, this kind of simple accessory elucidates rether converse effects. In the Namhae Bridge, the results are compared with the Manual's obtained by wind tunnel test. It reveals commendable agreement.

• The Journal of Internal Korean Medicine
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• v.29 no.3
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• pp.554-566
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• 2008

Objectives : Modified Gamgil-tang is a prescription commonly used for respiratory diseases. This thesis was carried out to check the treatment effects and diversity of drug formulation by comparing extraction method of ethanol and water of modified Gamgil-tang. Methods : All experiments were carried out with water and 50% ethanol extraction for comparison. In vivo experiment, hyaluronidase inhibitory effects and trypsin inhibitory effects were tested to measure the anti-inflammatory effects activity. Scavenging effects of DPPH free radical, xanthine oxidase inhibitory effects and inhibition on TBA-RS formation were experimented to measure anti-oxidative effects. With the in vivo experiment, ICR group mice and SD group rats were used as experimental animals. An anti-inflammatory effects experiment were carried out to measure the action on carrageenin-induced hind paw edema: analgesic effects were measured using writhing syndrome induced by 0.7% acetic acid in mice: antipyretic effect was measured using endotoxin, and inhibitory effects of increase vascular permeability induced by 0.5% histamine were measured. Results : For extraction of glycyrrhizin contents, ethanol extract was extracted 2 times of that of water extract. Anti-inflammatory effects showed high in ethanol extract. Anti-oxidative effects measured high in ethanol extract. No significant result was found in inhibition on TBA-RS formation. Analgesic effects were found to be similar in water and ethanol extract. Antipyretic effects were found to be stronger in water extract. Inhibitory effects of increase vascular permeability induced by 0.5% histamine showed stronger in ethanol extract. Conclusion : By measuring anti-inflammatory effects, analgesic effects, antipyretic effects, anti-oxidative effects, and histamine permeation inhibition effects both in water extract and ethanol extract after adding agents such as Mentha Herba, Gardenias Fructus, and propolis to existing Gamgil-Tang, ethanol extract was found to be more effective in anti-inflammatory effects, analgesic effects, anti-oxidative effects, and histamine permeation inhibition effects. The converse was found for antipyretic effect.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.341-350
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• 2011

This study aims at providing basic data on organ donation by analyzing factors of influencing toward intention to organ donation and further at improving people's consciousness on organ donation, subject to citizens of Busan City. The data was collected for 47 days from 14 July to 31 August, 2009. Among a total of 2200 cases of the questionaries, only 2042 cases were used. For data analysis, SPSS 17.0 was used, and for the specific analysis method frequency analysis to understand general characteristics of the participants. In addition, examination on T-test and ANOVA analysis were conducted after analyzing the factors for participants' consciousness on organ donation, and logistic regression analysis for understanding of relations between participants' will to donate organs and general characteristics. The results of this study are summarized as follows; First, among the participants, those who have heard about organ donations were 71.6%. Second, the factors that general characteristics influence on the attitudes towards organ donation include gender, chronic diseases or incurable diseases in the respondents or their family, religion, acceptive attitude factor, exclusive attitude factor and positive attitude factor towards organ donation. Based on the results, in order to raise people's consciousness on organ donation and form social sympathy, more than anything else, public mass media like broadcasting is important. In addition, as organ donation centers and related institutions prepare nationwide events, we should endeavor to prepare the opportunities in various ways to converse people's consciousness on organ donation and further put organ donation into practice.

• Korean Journal of Heritage: History & Science
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• v.52 no.3
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• pp.172-187
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• 2019

Knowledge of intangible cultural heritage is usually disseminated through word-of-mouth and actions rather than written records. Thus, people assemble to teach others about it and form communities. Accordingly, to understand and spread information about intangible cultural heritage properly, it is necessary to understand not only their attributes but also a community's relational characteristics. Community members include specialized transmitters who work under the auspices of institutions, and general transmitters who enjoy intangible cultural heritage in their daily lives. They converse about intangible cultural heritage in close relationships. However, to date, research has focused only on professionals. Thus, this study focused on the roles of general transmitters of intangible cultural heritage information by investigating intangible cultural heritage communities centering around Jeongseon Arirang; a social network analysis was performed. Regarding the research objectives presented in the introduction, the main findings of the study are summarized as follows. First, there were 197 links between 74 members of the Jeongseon Arirang Transmission Community. One individual had connections with 2.7 persons on average, and all were connected through two steps in the community. However, the density and the clustering coefficient were low, 0.036 and 0.32, respectively; therefore, the cohesiveness of this community was low, and the relationships between the members were not strong. Second, 'Young-ran Yu', 'Nam-gi Kim' and 'Gil-ja Kim' were found to be the prominent figures of the Jeongseon Arirang Transmission Community, and the central structure of the network was concentrated around these three individuals. Being located in the central structure of the network indicates that a person is popular and ranked high. Also, it means that a person has an advantage in terms of the speed and quantity of the acquisition of information and resources, and is in a relatively superior position in terms of bargaining power. Third, to understand the replaceability of the roles of Young-ran Yu, Nam-gi Kim, and Gil-ja Kim, who were found to be the major figures through an analysis of the central structure, structural equivalence was profiled. The results of the analysis showed that the positions and roles of Young-ran Yu, Nam-gi Kim, and Gil-ja Kim were unrivaled and irreplaceable in the Jeongseon Arirang Transmission Community. However, considering that these three members were in their 60s and 70s, it seemed that it would be necessary to prepare measures for the smooth maintenance and operation of the community. Fourth, to examine the subgroup hidden in the network of the Jeongseon Arirang Transmission Community, an analysis of communities was conducted. A community refers to a subgroup clearly differentiated based on modularity. The results of the analysis identified the existence of four communities. Furthermore, the results of an analysis of the central structure showed that the communities were formed and centered around Young-ran Yu, Hyung-jo Kim, Nam-gi Kim, and Gil-ja Kim. Most of the transmission TAs recommended by those members, students who completed a course, transmission scholarship holders, and the general members taught in the transmission classes of the Jeongseon Arirang Preservation Society were included as members of the communities. Through these findings, it was discovered that it is possible to maintain the transmission genealogy, making an exchange with the general members by employing the present method for the transmission of Jeongseon Arirang, the joint transmission method. It is worth paying attention to the joint transmission method as it overcomes the demerits of the existing closed one-on-one apprentice method and provides members with an opportunity to learn their masters' various singing styles. This study is significant for the following reasons: First, by collecting and examining data using a social network analysis method, this study analyzed phenomena that had been difficult to investigate using existing statistical analyses. Second, by adopting a different approach to the previous method in which the genealogy was understood, looking at oral data, this study analyzed the structures of the transmitters' relationships with objective and quantitative data. Third, this study visualized and presented the abstract structures of the relationships among the transmitters of intangible cultural heritage information on a 2D spring map. The results of this study can be utilized as a baseline for the development of community-centered policies for the protection of intangible cultural heritage specified in the UNESCO Convention for the Safeguarding of Intangible Cultural Heritage. To achieve this, it would be necessary to supplement this study through case studies and follow-up studies on more aspects in the future.