• 소음진동
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• 제9권5호
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• pp.991-997
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• 1999

It is getting higher the demand on a good sound in a car. Like some other sensory qualities, achieving a good sound is still treated as a black-box followed by the individual taste of tuning engineers. This study aims to define the attributes of a good car audio sound and the assessment factors affecting the sound quality. With a variety of surveys on professional listening groups and car audio installers, 26 most frequently used vocabularies are selected as typical presentations of car audio sound quality. After repetitions of listening tests with deliberately selected test CD, pre-recorded 15 different digital car-recordings, headphones replay system, and three different listening groups, it is proved that there are at least 5 different assessment factors which significantly affect the car audio sound quality. They are high fidelity, spectral balance, tonal accuracy, sound stage and acoustic fault.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.1148-1150
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• 2002

The exhaust system could be a dominant acoustical source in the passengers vehicle. It would be very important to obtain the acoustically good exhaust system, in order to control the cabin interior sound in automotive. In order to obtain the acoustically good exhaust system in automotive, many kinds of exhaust system should be measured, and simultaneously those results should be compared by the sound quality parameters. In this paper, in order to develop the methodology determining sound quality parameters, acoustic simulator is introduced, combining the time domain analysis and convolution analysis. As an example to verify the reliability of this method, several kinds of measurements are carried out, and the acoustically good exhaust system is selected, based on this proposed method.

• 감성과학
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• 제15권4호
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• pp.453-468
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• 2012

본 연구는 라벤더(Lavandula angustifolia)향이 성인 남자의 뇌기능에 미치는 효능을 살펴보기 위해 뇌파 변화를 살펴보았다. 라벤더향이 감성에 미치는 효과에 대한 연구는 주로 여자를 대상으로 한 연구가 많고 남자를 대상으로 한 연구가 거의 없다. 따라서 본 연구에서는 신체적으로 건강한 20대 남자 성인(35명)을 대상으로 피츠버그 수면질 지수를 통하여 수면질을 조사하여 실험군과 대조군의 좋은 수면질과 나쁜 수면질의 네 군으로 분류하였다. 뇌파 전극을 10-20 국제법에 의하여 전두부(F3, F4), 측두부(T3, T4), 후두부(O1, O2), 두정부(P3, P4)에 부착하고 라벤더 향기요법 전 3분, 향기요법 중 3분, 그리고 향기요법 후 3분씩 나누어서 뇌파 검사를 시행하였다. 결과에서 수면질이 좋은 군에 라벤더향이 뇌파에 미치는 영향은 양쪽 대뇌반구의 두정부에서 델타파를 증가시키고 오른 대뇌반구 측두부에서 세타파를 증가시키며, 양쪽 대뇌반구의 두정부에서 알파파를 감소시켰다(p<0.05). 또한 라벤더향은 수면질이 나쁜 군의 왼 대뇌반구의 전두부에서 델타파와 양쪽 대뇌반구의 전두부에서 세타파를 증가시켰다(p<0.05). 결론적으로 라벤더향은 수면질이 좋은 남자 성인에서 각성 상태에 관련된 뇌파를 감소시키면서 수면 상태에 관련된 뇌파는 증가시키는 효능이 있었고, 수면질이 나쁜 남자 성인에서는 수면 상태에 관련된 뇌파를 증가시키는 효능이 있었다.

• TTA 저널
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• 통권86호
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• pp.89-93
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• 2003

TTA(한국정보통신기술협회)는 2003년 2월 28일, 품질인증 제품으로 ㈜하나디에스디의''라이프에듀빌더 v 1.0'', ㈜연성정보기술의''이메일플러스 v 3.0'', ㈜포스정보의''책꽂이KDC v 3.1'', ㈜켈코인의''챌린저 웹진 웹스쿨 v 3.0'' 등 4개의 제품에 대하여 Good Software 마크를 발급하였다. 그리고 2003년 3월 10일에 VeriTest-TTA 인증제품으로 (주)스페이스 인터내셔널의''CD Tower v 3.1''은 VeriTest-TTA Good Quality, Optimized Performance & Internationalized 마크를, ㈜포스데이터의''BizBinder v 1.0''은 VeriTest-TTA Good Quality & Optimized Performance 인증마크를 발급하였다. 본 고에서는 상위의 인증 획득한 제품에 대하여 소개하고자 한다.

• 환경영향평가
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• 제17권6호
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• pp.373-380
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• 2008

The Ministry of Environment plans to improve quality of water which is achieved over 85% in rivers and 94% in lakes of the whole country as "Good Water" until 2015. Also, the law of evaluation of water quality and water quality goal were made newly. So, the water quality has evaluated by using new law since 2007. This study evaluated whether "Good Water" and" Water Quality Goal" were achieved or not in 22 middle-sized districts and major 10 lakes of Geum river. The achievement rates of rivers decreased and the achievement rates of lakes mostly were the same for 5 years. In 2007, the achievement rates of "Good Water" were 50% in rivers and 50% in lakes. The achievement rate of "Water Quality Goal" were 59.1% in rivers and 20% in lakes. The water quality in 2007 was evaluated worse than last year in case of rivers. The evaluations of Korea-Comprehensive Water Quality Index(K-CWQI) showed that achievement rates of "Water Quality Goal" were 81.8% in rivers and 0% in lakes. The statistical correlation analysis showed that correlations between BOD and COD were meaningful at the downstream, compared to upstream, generally. In case of lakes, correlations between COD and temperature were meaningful. Also, correlations between COD and Chl-a were meaningful. The Trophic State Index ($TSI_{KO}$) showed that the half of lakes are major over eutrophic status in lakes. These analytical methods such as K-CWQI, $TSI_{KO}$, statistical correlation analysis could be additionally helpful for evaluation of water quality and provide basis data for understanding characteristics of watershed in Geum river.

• 한국조리학회지
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• 제14권1호
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• pp.161-169
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• 2008

This study was performed to find out the quality characteristics of rice noodles by addition of red ginseng(0, 2, 6, 10%). The quality characteristics of the sample were estimated in terms of general composition, growth of microorganism and sensory evaluation. The results from this study were as follows. The protein, lipid and ash contents did not show significant difference in any of the groups. In dry rice noodles, moisture content significantly decreased in red ginseng groups but, in half-cooked rice noodles, moisture content significantly increased in 6 % and 10% red ginseng added groups(p<0.05). The microbial count showed less growth in red ginseng added groups after 3 months(p<0.05). According to sensory evaluation, surface color proved very good in the 10% red ginseng added group among the training panel while very good in the 2% red ginseng added group among consumers. Flavor was good in red ginseng added groups(p<0.05). Taste was very good in the 3% red ginseng added group. Appearance and overall quality were highest in the 2% and 6% red ginseng added groups(p<0.05). Therefore, rice noodles containing 2% or 6% red ginseng were most preferable and safe during 5 months and 6 days in dry and half-cooked noodles respectively.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.113-114
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• 2015

This paper is to investigate the effect of poor quality aggregate source used in Korea on the mixture proportion and strength development of the high strength concrete fixed at 450 kg/m3 of cement contents. For aggregate kinds, good quality crushed stone from KS certified manufacturer and low quality crushed stone from non certified construction field are used. For fine aggregates, river sand, land sand, sea sand and mixed sand are also used. It is found that the use of low quality aggregates resulted in an increase of water demand considerably due to poor gradation of aggregate and excessive fine particles. Test results indicate that the use of low quality aggregate also decreases the compressive strength compared with that of good quality aggregate.

• 경영과정보연구
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• 제1권
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• pp.293-307
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• 1997

This paper addresses the critical factors of customer satisfaction between department store which is characterized as a good service quality and discount store which has a competitive advantage on price dimension. The result showed that overall satisfaction of department store was slightly higher than that of discount store. Also, it was found that only service quality was a good indicator as a customer satisfaction of department store. However, overall satisfaction of discount store was significantly affected by both price and service quality. The study contributes to our understanding of how department store and discount store develop KSFs(key success factors) of customer satisfaction.

• 대한한약학회:학술대회논문집
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• 대한한약학회 2007년도 Autumn Conference
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• pp.185-186
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• 2007

• 대한전자공학회논문지
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• 제25권4호
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• pp.447-452
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• 1988

This paper proposes a hybrid image coding in order to improve the coding performance by combining the BTC with the DPCM. And utilizing the human perceptual characteristics, a new objective image quality evaluation method has been proposed to obtain an excellent result in good agreement with the subjective quality evaluation. A hyb-1 method consisting of the DPCM and the AMBTC has retained a good picture quality at the bit rate of 1.5 bits/pel. A hyb-3 method combining the EBTC-3 with the DPCM has scarcely degraded the picture quality compared with the original image at the bit rate of 2.1 bits/pel. A newly proposed mehtod of picture quality evaluation accumulating a blocky noise at the edge block and an impulsive noise at the flat block selectively has been coincident with the subjective evaluation of quality.