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Design of Plano-Convex Lens Antenna Fed by Microstrip Patch Considering Integration with Microwave Planar Circuits

  • Yu, Seung-Gab;Yeon, Dong-Min;Kim, Yong-Hoon
    • Journal of electromagnetic engineering and science
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    • v.1 no.1
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    • pp.67-72
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    • 2001
  • In this paper, the plano-convex lens antenna fed by a single patch is studied for a microwave remote-traffic monitoring sensor with constraints of small size and low cost. Measurement of an AUT (Antenna Under Test) involves the considerations of a triangular groove for matched layer and metallic shielding effects. A formulation for extracting the parameters of a piano-convex lens antenna, based on geometrical optics, is introduced using Fermat`s principle of the equi-phased ray condition. Teflon ($\varepsilon_{{\gamma}}$/ =2.0) is chosen as a material of a plano-convex lens antenna for adjustment of aberrations on the lens surfaces automatically. A fabricated plano-convex lens shows 3-dB beamwidth of 7.5 degree and side-lobe level of -29 dB with an aperture distribution of the parabolic-squared taper on pedestal. This lens supports easier integration with the planar microwave circuits by using a microstrip single patch as a primary feeder of the lens antenna.feeder of the lens antenna.

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A Consideration on the System for Ear Training (청음연습을 위한 시스템에 관한 고찰)

  • Kim, Seoung-Eun;Song, Eun-Jee
    • Journal of Digital Contents Society
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    • v.9 no.3
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    • pp.517-524
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    • 2008
  • Ear training is said to be the ability to measure sound either in terms of musical scale or cord by listening to music acoustically. This is the most basic subject and the most practical technique in any music genre; also, the most crucial factor for individuals who are studying music. Ear training is an important skill to develop when learning to play the piano, or learning any kind of musical instrument. It is also the key factor in a successful music education. Everyone can develop their musical ability if ear training is provided during childhood. The aim of this study is to develop an ear training system whereby beginners or children can learn music with ease in terms of computer access which is part of their daily life. This system is devised so that children can practice ear training easily. This system is also beneficial to others who plan to major in music.

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Synthesis and Characterization of 1,4-Diimine Complexes of 1,2,3,4,5-Pentamethylcyclopentadienylrhodium and iridium

  • Paek, Cheol-Ki;Ko, Jae-Jung;Uhm, Jae-Kook
    • Bulletin of the Korean Chemical Society
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    • v.15 no.11
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    • pp.980-984
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    • 1994
  • Monomeric rhodium and iridium diimine complexes $Cp^*M(HNRNH)(Cp^*$ = 1,2,3,4,5-pentamethylcyclopentadienyl : (M=lr; R=o-$C_6H_4 (1a), 4,5-(CH_3)_2-C_6H_2-1,2 (1b), 4,5-(Cl)_2-C_6H_2-1,2$ (1c), NCC=CCN-1,2 (1d): M=Rh; R=NCC=CCN-1,2 (1e)) have been synthesized from $[CP^*MCl_2]_2$ and 2 equiv. of diamine in the presence of $NEt_3$. The Crystal structure of 1a was determined by X-ray diffraction method : 1a was crystallized in the monoclinic system, space group $P2_{1/c}$, with lattice constants a=9.543 (1) ${\AA}$, b=16.286 (1) ${\AA}$, c=10.068 (1) ${\AA}$ and ${\beta}$=99.25 (1), with Z= 4. Least-squares refinement of the structure led to R factor of 0.049. The coordination sphere of rhodium and iridium can be described as a 2-legged piano-stool. All complexes are highly colored. Electrochemical studies show that 1d and 1e display quasi-reversible reduction and 1a-1c display irreversible reductions, suggesting that the acceptor orbital might be localized on the diimine ring.

Technological Aspects of the Use of Modern Intelligent Information Systems in Educational Activities by Teachers

  • Tkachuk, Stanislav;Poluboiaryna, Iryna;Lapets, Olha;Lebid, Oksana;Fadyeyeva, Kateryna;Udalova, Olena
    • International Journal of Computer Science & Network Security
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    • v.21 no.9
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    • pp.99-102
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    • 2021
  • The article considers one of the areas of development of artificial intelligence where there is the development of computer intelligent systems capable of performing functions traditionally considered intelligent - language comprehension, inference, use of accumulated knowledge, learning, pattern recognition, as well as learn and explain their decisions. It is found that informational intellectual systems are promising in their development. The article is devoted to intelligent information systems and technologies in educational activities, ie issues of organization, design, development and application of systems designed for information processing, which are based on the use of artificial intelligence methods.

Pilot Study for Perceived Effectiveness of Music Therapy for Pain and Music Preference in Women following Gynecological Surgery in a Local Area (일개 지역 부인과 수술환자가 인식하는 음악요법의 통증 조절효과 및 음악 선호도 : Pilot study)

  • Ahn, Suk-Hee
    • Women's Health Nursing
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    • v.11 no.4
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    • pp.273-279
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    • 2005
  • Purpose: The purposes of this pilot study were to describe the perceived effectiveness of music therapy for pain control and to identify music preference for postoperative pain and anxiety control in Korean women who had a gynecological surgery. Sample: A convenience sample of 52 women was recruited from a gynecological unit at P University hospital and they were interviewed to assess their perception of music therapy and music preference using a structured study questionnaire. Results: Fifty-six percent of women reported that music therapy would be effective and 96% perceived it would be effective if combined with analgesics. The best music chosen for relieving postoperative pain and anxiety were Korean old pop and ballad song/music followed by Korean religious music, American pop songs, piano music, Korean classic songs, and Orchestra music. Conclusion: There was a cultural difference in music preference for the relief of post-operative pain in this sample. Therefore, effects of music for postoperative pain control need to be determined after considering musical preferences of postoperative women in Korea.

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Performance as a factor in the Contemporary Fashion Show - focus on the Paris and London collections Since the 1990s - (현대 패션쇼에 나타난 퍼포먼스적 요소 - 1990년 이후 파리, 런던 컬렉션을 중심으로 -)

  • 장안화;박민여
    • Journal of the Korean Society of Costume
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    • v.51 no.4
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    • pp.71-80
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    • 2001
  • Since the beginning of the 90's, Fashion shows appear to be a type of performance form of art combining with other areas to visually entertain the viewers. This can be explained by the modern tendency to escape from society which requires formality and complicated lifestyles. Fashion shows take place in a scene Influenced by the idea of post-modernism which redefines the definition of space. A church, old factory, unoccupied ground, subway stations, or even place like a waste disposal are used as a setting. The stage set is no longer the T shape run way and the procinium arch has disappeared. The gap between audience and stage has diminished and theatrical element is added to the fashion performance by using viewers living and working environments as setting of the show. The human relation with machine based on the cutting edge technology such as the stage automation, robots and mist making sprinkler system introduces new elements with spontaneity and detailed planning in the stage performance. Music also plays an Important role in attracting viewers. The sound track covers house music to techno music. Instead of music being abstract, folks orchestral music, choirs, piano. even live concert performed by pop artist provide the liveliness of the fashion show. And the catwalk itself is a performance. Model needs to be well trained as the capable talent who can handle sensitive gestures, facial expressions, dancing and choreography. The improvisatorial interaction between audience and model lead to audience participation. Models now range from pop star, ordinary people, handicapped people, to elderly and so on. John Galliano introduced the theatrical factors for the fashion show and Alexander Mcqueen approached the fashion show as the visual art of communication. Hussein Chalayan utilized high technology skewing futurism as if in a magic show. Today the Fashion show tends to be a total performance which includes audience participation, impromptu, and that break the limitation that fashion shows previously had. This will lead the fashion industry in opening new horizon of its own.

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Knit Design Represented with the Technique of Hand-knit (핸드니트 기법을 응용한 니트디자인 연구)

  • Park, Yu-Hyun;Choi, Jeong-Wook
    • Journal of the Korean Home Economics Association
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    • v.45 no.4
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    • pp.43-51
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    • 2007
  • This study analyzed the knit wear trend, which has gained attention as a sensuous and luxury item, through collection magazines, and used the technique of hand-knit to produce and present the knit wear that was designed based on the study results. Accordingly, the purpose of this study is to raise awareness of the expansion of hand knit's new expression techniques and expression areas and to verify its possibility as a higher value-added product. The trends of hand-knit wear resulted from the analysis of collections divided into the following four groups, and the knit designs were also grouped accordingly: First was "The design using object." The trend survey showed the results that the form of drops or flowers was often used as a factor of object. Accordingly, as for the study design, the drop-knitting technique, which is one of the pattern knitting techniques, was used to present a design that employed drops as the object. Second was "The design matched with woven material." It is a way to emphasize aesthetic formativeness and at the same time to activate the area of knit design by matching woven material, which is different from knit in texture, with knit. This study presented a design that tried to combine knit texture and woven material by connecting denim material with various textures and colors. Third was "The design to express see-through." A sense of showing through knit wear was expressed through changes in the type of thread or knitting technique. In this study, the sense of see-through was expressed using piano wires and wool threads and through changes in the thickness of needle. Fourth was "The design to emphasize coloring." It was analyzed that regarding the production of hand knit, the method of coloring expression was to express points, lines and sides or to create harmony by changing the material's color or texture to show particular objects or shapes. In this study, a jacket was designed using the method to express points, lines and sides by changing the material's color.

Using Potential Field for Modeling of the Work-environment and Task-sharing on the Multi-agent Cooperative Work

  • Makino, Tsutomu;Naruse, Keitarou;Yokoi, Hiroshi;Kakazu, Yikinori
    • Proceedings of the Korea Inteligent Information System Society Conference
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    • 2001.01a
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    • pp.37-44
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    • 2001
  • This paper describes the modeling of work environment for the extraction of abstract operation rules for cooperative work with multiple agent. We propose the modeling method using a potential field. In the method, it is applied to a box pushing problem, which is to move a box from a start to a goal b multiple agent. The agents follow the potential value when they move and work in the work environment. The work environment is represented as the grid space. The potential field is generated by Genetic Algorithm(GA) for each agent. GA explores the positions of a potential peak value in the grid space, and then the potential value stretching in the grid space is spread by a potential diffusion function in each grid. However it is difficult to explore suitable setting using hand coding of the position of peak potential value. Thus, we use an evlolutionary computation way because it is possible to explore the large search space. So we make experiments the environment modeling using the proposed method and verify the performance of the exploration by GA. And we classify some types from acquired the environment model and extract the abstract operation rule, As results, we find out some types of the environment models and operation rules by the observation, and the performance of GA exploration is almost same as the hand coding set because these are nearly same performance on the evaluation of the consumption of agent's energy and the work step from point to the goal point.

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A Study on Symbols of Suppression and Liberty in the Movie (영화 <피아니스트>의 억압과 자유의 상징 연구)

  • Choi, Il-Mok
    • The Journal of the Korea Contents Association
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    • v.16 no.12
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    • pp.151-159
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    • 2016
  • The discussion was started from the question about how literary linguistic expressions are reproduced in the movies. This study focuses on the cinematized version of Jelinek's "Die Klavierspielerin", the by Michael Haneke. and looking for cinematization of literary works and these aesthetic values. The original delicately describes the life of Erika who has been living under the supervision and control by her mother. The topic of the is the conflict between the controlling mother and the desires of the heroin Erika who has been living under the suppression. The world of suppression symbolized by her mother is described as closed and dark space while the world of Erika and her desires, represented by Walter is described as open and bright space. The life of Erika living under control symbolized by prison-like double doors, iron-barred window, darkness and shadow is abnormally distorted. Even the piano that must be the center of her life as a pianist is also one of the symbols of dark world of suppression.

A Study on the Effect Factors of Management Performance in Music Institute (음악학원의 창업성과에 영향을 미치는 요인에 관한 연구)

  • Park, Ji-Young
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.6 no.3
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    • pp.43-59
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    • 2011
  • These days there are so many music school graduates. There are also many private music education institutions. Therefor the competition in music private education market very tight. In old days people working in education music market had made big money and many parents wanted their girls and boys to learn piano and other musical instruments. However recently birth ratio in Korea has been dramatically dropped and not many parents wants their kids to learn musical instruments because of economic depression and negative music market. Eventually the size of the music education market is decreased dramatically and the competition in music education market is very hot. Therefor without the upgraded management system it is hard to expect over performance in music education market aspects. The purpose of this study was to find out what are the main factors that affect on business performance of the music education institutions. The main areas that researched in this study were success factors, reason of the start-up, and factors of management success. The research was conducted on the owners of the music education institutions. The factors that affect on the outcome of the business performance were diverse. Therefore the management of music education institutions also need the systematical analysis on the location, environmental factors, people nearby areas, differentiated market strategy and other analysis the same as corporate and business management.

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