• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.881-882
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• 2008

This paper presents an algorithm of target detection of an underwater acoustic signal by estimating the background. At first, subtract the estimated background from the underwater acoustic signal. To estimate the background, this paper uses an algorithm of Denoising. By using Thresholding and Power analysis, we extract targets from the signal to eliminate the background. The proposed method is valuable as an algorithm to reduce calculation amounts of multi frames we will apply.

• 디지털콘텐츠
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• 11호통권42호
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• pp.78-88
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• 1996

정부는 10월 14일 '국가경쟁력 강화를 위한 정보화 전략'을 발표,소프트웨어와 영상산업을 비롯한 정보통신산업을 21세기 주도산업으로 육성하겠다고 발표하였다. 이날 회의를 주재하나 김영삼 대통령은 국가경쟁력 강화를 위한 정보화 전략으로 정부의 정보화 실천 선도, 경쟁력 제고 핵심분야의 정보화 우선투자, 산업화 과정상의 문제해결, 소프트웨어와 영상산업 육성, 정보화 추진기반 정비, 통일대비 정보화추진 등 6대 정보화과제를 추진하겠다고 밝혔다. 이날 발표한 '정보화 전략'의 6대 과졔는 그 범위가 매우 방대하다. 좁은 의미의 정보기술활용을 뛰어넘어 국가경쟁력향상 및 국민 삶의 질개선을 궁극적으로 추진한다는 내용을 담고 있다. 지금까지 정부 각부처, 혹은 각 부문에서 추진돼 온 정보화사업이 없었던 것은 아니지만 상호연계성이 결여돼 비용이 중복 발생하거나 효과를 보지 못한 경우가 많았다. 이제 정부에서 이러하나 문제점을 의식하고 전체 차원에서의 최적화를 위한 조정기능을 강화하겠다는 의지를 나타낸 것으로 보인다. 본고에서는 국가경쟁력 강화를 위한 정보화 전략의 전문을 게재한다.

• 한국소음진동공학회논문집
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• 제15권4호
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• pp.452-456
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• 2005

Cyclone is widely adopted in the vacuum cleaner, because of the simple structure, the high dust collection efficiency and its transparency feature, which can be shown to the customer. At past times, cyclone performance was represented by collection efficiency, flow rate, pressure drop etc. At recent times the noise problem is getting important as cyclone comes into home-appliances. In this paper, pressure drop of cyclone and it's noise were measured at the variation of the cyclone structure and the main sources of cyclone peak noise was found by experimental and numerical analysis. In addition, the structure for peak noise reduction was suggested and it is beneficial both pressure drop and noise reduction.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2004년도 유체기계 연구개발 발표회 논문집
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• pp.521-526
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• 2004

This paper introduces works performed for reducing high frequency noise of a reciprocating compressor. Noise in a high frequency range strongly affects sound quality as well as increases total noise level of the compressor. In order to reduce the noise, two different works were carried out. the first work was to measure the vibration Power transferred through suspension spring and discharge pipe; and the second one was to obtain operational deflection shape from cross-power spectrum measured on shell. Based on the information, Adequate structural modification of the transfer path and shell resulted in noise reduction in a high frequency range.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.622-627
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• 2003

Until now, product mostly has revealed physical quantities created by the standpoint of engineers. Consumers, however, perceive and evaluate products on the non-physical characteristics, such as feelings, emotions, and experiences in different social and cultural situations. Especially, for the household appliances fur instance air-conditioner or refrigerator, the sound is heavily related to the satisfaction of a customer who is a real user of the product and is very important factor to decide purchasing as well as visual design. Therefore, in this research, the general tendency of consumer's psychology was investigated for the appliances. And also, in order to obtain clear guidelines for sound manipulation, the characteristics of the sound of air-conditioning systems and refrigerators were compared with others. Since it is important to overcome the discrepancy between engineering and marketing, the relevance of sound manipulation must be documented from the consumer's perspective. That is the reason why we conducted a consumer and marketing oriented study.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.145-148
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• 2004

Until now, product mostly has revealed physical quantities created by the standpoint of engineers. Consumers, however, perceive and evaluate products on the non-physical characteristics, such as feelings, emotions, and experiences in different social and cultural situations. Especially, for the household appliances such as a refrigerator, the sound is heavily related to the satisfaction of a customer who is a real user of the product and is very important factor to decide purchasing as well as visual design. Therefore, in this research, not only the simple sound pressure level but also the consumer's sense of hearing evaluate the noise from the refrigerator. And also, in order to improve the quality of sound through the design change, the consumer's evaluation is analyzed and related to the engineering quantities.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.89-92
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• 2004

Cyclone is widely apoted in the vacuum cleaner, because of it's simple structure, the dust collection efficiency is high and its transparency feaure which can be shown to the customer. At past times, cyclone performance is represented by collection efficiency, flow rate, pressure drop etc. At recent times the noise problem is getting important as cyclone comes into home-appliances. In this paper, cyclone's pressure drop and noise is measured at the variation of the cyclone structure and the main sources of cyclone peak noise is found by experiments and numerical analysis. In addition, the structure for peak noise reduction is suggested and it is beneficial both pressure drop and noise reduction.

• 전자공학회논문지CI
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• 제37권1호
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• pp.11-20
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• 2000

본 논문은 도로영상에서 움직이는 물체 추적을 위한 윤곽선 및 형태 파라미터 추출방법을 제안코자 한다. 축소영상에서 차영상 방법을 이용하여 윤곽선을 추출하고 원영상에서 특징을 추출함으로써 추적의 정확성을 높이고자 한다. 사용된 특징은 물체화소의 원분포, 중심모멘트, 최대${\cdot}$최소비이다. 이를 이용하여 데이터 연상문제를 해결하였으며, 실시간 추적을 위하여 칼만필터를 사용하였다. 제안된 알고리즘에 의해 추출된 특징 벡터는 다중 차량 추적에 적합함을 실험을 통해 보였다.

• 한국압력기기공학회 논문집
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• 제16권2호
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• pp.35-46
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• 2020

In this paper, a fracture mechanics evaluation system which can be used to assess the leak-before-break (LBB) of nuclear piping is developed. Existing solutions for calculating the fracture mechanics parameters (J-integral and crack opening displacement) required for LBB evaluation were firstly presented. Then a module for calculating J-integral and COD was developed, with an additional module for predicting the critical load based on the crack driving force diagram to finally develop a fracture mechanics evaluation system. To confirm the validity of the proposed evaluation system, finite element (FE) analysis was performed, and the FE J-integral and COD results were compared with prediction results using the J-integral and COD estimations program. Furthermore, the critical load assessment module was verified by comparing the actual pipe test results (Battelle test data) with prediction results using the proposed program.

• 한국언론정보학보
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• 제71권
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• pp.9-32
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• 2015

미디어의 전통적인 역할 중 하나는 개인의 제한적 기억을 보조하고 사회구성원들의 사적 기억을 공적 기억으로 변환시키는 것이다. 특히 매스미디어는 사적인 기억의 조각들을 모아서 공공의 기억을 만들어 낸다. 과거를 현재로 불러오고 과거의 현재적 의미를 재구성하는 과정을 통해 매스미디어는 과거를 인식하고 이해하는 역사인식의 방향에 영향을 미친다. 오늘날 인터넷을 비롯한 각종 뉴미디어가 범람하고 있지만, 여전히 텔레비전은 소시민들의 일상에서 집단의 기억을 구성하는 가장 핵심적인 실천 기제로 존재한다. 이러한 맥락에서, 이 연구는 매개된 집합 기억을 생산하는 주체로서의 지상파 텔레비전 뉴스를 분석하여 오늘날 $5{\cdot}18$이 어떤 기억으로 재현되는가를 밝히고자 하였다. 우선 뉴스가치 분석을 통해 역사적 사건으로서의 $5{\cdot}18$에 대한 뉴스가치는 정권의 변화에 따라 다르게 평가되었고, 그마저도 대부분 정치적 이슈에 따라 가변적 뉴스 소재로 취급되었음을 알 수 있었다. 또한 담론 분석을 통해 $5{\cdot}18$ 관련 뉴스들이 관행적으로 보도되고, 연성화(softening)되고 있다는 결론을 내릴 수 있었다.