• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(1)
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• pp.361-364
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• 2001

Speech quality measurement is sorted subjective and objective speech quality measurements based on the mathematics representation. Between two, subjective speech quality measurement is able to be evaluated more accurate speech quality then objective one but it has a demerit such as taking much more time and cost to performance it. However, using objective speech quality measurement being able to predict the result of evaluating the subjective speech quality compliments the demerit of subjective standards which is mentioned former. In this paper, we propose the objective speech quality measurement in order to evaluate naturalness assessment approximately like subjective speech quality measurement. We measured naturalness of speech with estimating speaking rate, variation of pitch and energy.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1654-1656
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• 1996

Generallly speaking, busbar made with Cu or Cu alloys and producted by plastic manufacturing process. In this study, we reacarch the trend and manufacturing of Cu clad Al busbar for low cost and light weight which used for a electric power suply of distributing board. The objectives of this study is the trend of busbar on electric power supply, the process and application for Cu clad Al busbar and the relation between electric properites and manufacturing operating process on contact parties

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 추계학술대회 논문집 학회본부
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• pp.597-599
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• 1997

Cochannel speaker separation is employed when speech from two talkers has been summed into one signal and it is desirable to recover one or both of the speech signals from the composite signal. Cochannel speech occurs in many common situations such as when two AM signals containing speech are transmitted on the same frequency or when two people are speaking simultaneously (e. g., when talking on the telephone). In this paper, the method that separated the speech in such a situation is proposed. Especially, only the voiced sound of few sound states is separated. And the similarity of the signals by the cross correlation between the signals for exactness of original signal and separated signal is proved.

• 전기학회논문지P
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• 제60권1호
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• pp.37-44
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• 2011

HSPA(High Speed Packet Access)/HSPA+ is a combined 3GPP(Third Generation Partnership Project) standard of HSDPA(High Speed Downlink Packet Access) and HSUPA(High Speed Uplink Packet Access). The standard can provide the high speed multimedia service against the 3GPP release 99 standard. In order to test the 3GPP HSPA/HSPA+ terminal performance, the measurement hardware is required for the evaluate the transmitted signal of HSPA/HSPA+ terminals. Agilent Technologies and Innowireless produce the measurement equipments for HSPA/HSPA+ terminals. Generally speaking, the receiving algorithms in normal modems cannot be used directly to the measurement system due to the lack of the algorithm accuracy. In this paper, we propose the new receiver algorithm for precise measurement of 3GPP HSPA/HSPA+ terminal signal, and implement measurement functionality for performance measurement of the 3GPP HSPA/HSPA+ terminal by using software. The proposed 3GPP HSPA/HSPA+ signal measurement algorithm can be used for the commercial system through code execution speed optimization.

• 복식
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• 제8권
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• pp.15-27
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• 1984

A costume study is a part of the cultural history and also has the greatest relation to life's senses as a concrete culture. Korean costume that consists a double structure with Chinese one through Chosun Dynasty five hundred years, has recently changed up to the Western Form. In this respect Korean Costume has a important meaning in relation to Western costume. Traditional costume, generally speaking, has tendency to keep up by the common people than the higher classes. Then there were four classes. They are aristocratic classes common people, those who are engaged in the form, industry, trade and low classes. Merchant of them partially took charge of the cultural exchange about contacting with tradition and new one. Because it's easy to flow in one's character the new civilization. So there is an important significance to research of the merchant's costume in Gae Hwa Gi changing age of civilization in politics, economic, and social system. The records appeared about the merchant's costume in the age of civilization through literature study and natural photo at that time.

• 복식
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• 제47권
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• pp.161-170
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• 1999

In the East color is deeply related to man's feelings or emotional status. This is relevant to the peculiar naturalistic thoughts of the East and concretely speaking is based upon the idea of Yin Yang and Five Elements that has dominated the spiritual world of the East. We can see costumes of the Three Kingdoms era or Koryo dynasty on the murals of ancient tomb presume their social backgrounds through remains of the past and find out the existence of Saekdong. Chosun dynasty shows a wonderful growth of fashion not only in dress but also in such accessories as patchwork wrapping-cloth and Saekdong which imply a lot on formation or color arrangement. Saekdong which we can see throughout many Eastern countries is a representative image that has been forming and expressing our race's color emotions for a long time. Saekdong to become worldwidely used. And this study has attempted modernistic expressions with Saekdong.

• 한국인공지능학회지
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• 제2권1호
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• pp.1-3
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• 2014

These days, interest and demand on smart learning has rapidly increased. Video English and mobile system based English speaking service have become popular. This study gave prototype of application to give and take voice message with world people and to give new concept of voice pen-pal beyond exchange of text messages. In modern society having rapidly increasing demand on smart learning, you can study foreign language by smart phone and communicate with foreigners by voice anytime and anywhere. The app allows global exchange to learn conversation. Recruitment of initial users and profit model have problems. We shall develop to improve problems and to solve difficulty.

• 한국음향학회:학술대회논문집
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• 한국음향학회 2001년도 추계학술발표대회 논문집 제20권 2호
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• pp.53-56
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• 2001

사람은 연령, 성별 등에 따라 성도(vocal tract), 성대(vocal cord, 혹은 vocal fold), 비강(nasal tract)등 발성기관의 차이가 있고, 이는 음성의 음색, 높낮이 등 음향 특성에 영향을 미치며, 시간이 지나감에 따라 변하는 특성을 가지고 있다. 예를 들어, 발성기관의 차이가 큰 남성과 여성은 동일한 단어를 발성하더라도 음향학적으로 매우 큰 차이를 보이며, 이러한 특성은 다른 문장 발성 시에도 음향학적으로 일정한 영향을 미치게 되므로 정적특성이라 한다. 본 논문에서는 이러한 정적특성 중 음성의 발성크기에 따른 Glottal Spectrum을 비교 $\cdot$분석 하고자 한다.

• East Asian mathematical journal
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• 제23권3호
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• pp.271-302
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• 2007

The purpose of this study is to study how effective teachers' self reflectiveness are on enhancing mathematics teaching activities. Researcher is the object of the study and relating preceding researches, establish some instruments for study. This research was examined for six times from fifth week of March to second week of May. In order to accomplish this study, one class of the first grade of high school in Ulsan was selected. In order to define the changes of teaching activity, the first lecture was practiced without analyzing or reflective activity. From the second lecture, analyze and reflect own teaching activity with recording. After finishing all lecture, distribute the recordings to observers and other teachers and then, get measured. Based on the results, self reflective teaching makes great effects on enhancing teachers' teaching activities. Through teachers' own reflective teaching, they can know their advantages and disadvantages, repeatable was of speaking, and the acknowledgement of objectives. And, finally, they can enhance their teaching activity by reflective teaching.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 춘계학술대회 논문집 유기절연재료 전자세라믹 방전플라즈마 일렉트렛트 및 응용기술
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• pp.212-217
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• 2002

The dielectric breakdown of epoxy composites used for transformers was experimented and then its data were simulated by Weibull distribution probability. First of all, speaking of dielectric breakdown properties, the more hardener increased the stronger breakdown strength at low temperature because of cross-linked density by the virtue of ester radical. The breakdown strength of specimens with filler was lower than it of non-filler specimens because it is believed that the adding filler forms interface and charge is accumulated in it, therefore the molecular motility is raised and the electric field is concentrated. In the case of filled specimens with treating silane, the breakdown strength become much higher Finally, from the analysis of weibull distribution, it was confirmed that as the allowed breakdown probability was given by 0.1[%], the applied field value needed to be under 21.5 MV/cm.