• 디자인학연구
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• 제19권5호
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• pp.303-312
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• 2006

이 논문의 목적은 슐츠가 제의한 통합 마케팅 커뮤니케이션(IMC) 이론을 바탕으로, 한국의 실정에 맞는 새로운 접점 분석 모델의 이론적 측면을 제시하는 것이다. 기존에 제시 되었던 접점 선택 모델의 단점을 개선하고 더욱 효과적인 통합 마케팅 커뮤니케이션을 실현하기 위한 이론적 배경을 확립하고자 시도하였다. 이를 위하여 시중에 유통되고 있는 MP3 플레이어X 제품을 직접 선택하여 시장조사를 하였고, 미디어 접점을 4대 매체를 중심으로 분석을 시도하였다. 그 결과 기존 선진 대행사에서의 약점 인 소비자 구매단계 개념에 대한 올바른 인식 그리고 시너지 효과를 보완 할 수 있는 이론적 근거를 마련하였다. 이러한 통합 마케팅 커뮤니케이션을 실현 할 수 있는 이론적 근거를 계속 확립하여 실무적 인 효용성의 기반이 마련되기를 바란다.

• 정보처리학회논문지B
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• 제10B권6호
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• pp.695-704
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• 2003

본 논문은 멀티미디어 데이터 스트림들을 이동단말기에서 연출(play)하기 위해 스트림의 특성을 파악한 후 변환 시킬 스트림을 선정하여 트랜스코딩하는 스케줄링 기법을 제시하였다. 이것은 연출될 모든 스트림들을 트랜스코딩하는 것보다 선정정책에 의해 특정 스트림을 선택하여 트랜스코딩하는 것이 최초 재생 지연 시간을 줄일 수 있는 장점이 있다. 따라서 본 논문은 멀티미디어 데이터 스트림들의 요구 대역폭을 네트워크 대역폭 보다 낮추면서, 이동 단말기에서 멀티미디어 데이터 스트림들이 재생되기까지의 최초 재생 지연시간을 최소화시킬 수 있는 방법으로 EPOB(End Point of Over Bandwidth) 기반의 트랜스코딩 스트림 선정 정책을 제안하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 추계학술대회 논문집
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• pp.80-84
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• 1996

This paper aims at reviewing the Possibility application over normal or abnormal, detection used by AE and the wear characteristics of grinding process. In this study, when diamond bur in dentistry with chosen grinding conditions were tuned at grinding. The variation of grinding resistance and hE signal is detected by the use of AE measuring system. The tests are carried out in accordance with diamond burs and workpiece; arcyl and bovine. According to the experiment results, the following can be expected; AE has the possibility to detect the state normality and abnormality. However, the grinding resistance measuring can find it difficult to detect it. It can be accurately excerpted from AE occurrence pattern in contact start point of diamond bur and bovine, grinding condition and derailment point. It is known that AE$\_$rms/ is well compatible with grinding resistance. According to the increase of the material removal rate, the specific energy of the diamond bur is inclined to decrease and the grinding resistance has a tendency to increase.

• Journal of Communications and Networks
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• 제18권2호
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• pp.150-161
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• 2016

Coordinated multi-point transmission (CoMP) techniques are being touted as enabling technologies for interference mitigation in next generation heterogeneous wireless networks (HetNets). In this paper, we present a comparative performance study of uplink (UL) CoMP algorithms for the 3GPP LTE HetNets. Focusing on a distributed and functionally-split architecture, we consider six distinct UL-CoMP algorithms: 1. Joint reception in the frequency-domain (JRFD) 2. Two-stage equalization (TSEQ) 3. Log-likelihood ratio exchange (LLR-E) 4. Symmetric TSEQ (S-TSEQ) 5. Transport block selection diversity (TBSD) 6. Coordinated scheduling with adaptive interference mitigation (CS-AIM) where JRFD, TSEQ, S-TSEQ, TBSD and CS-AIM are our main contributions in this paper, and quantify their relative performances via the post-processing signal-to-interference-plus-noise ratio distributions.We also compare the CoMP-specific front-haul rate requirements for all the schemes considered in this paper. Our results indicate that, with a linear minimum mean-square error receiver, the JRFD and TSEQ have identical performances, whereas S-TSEQ relaxes the front-haul latency requirements while approaching the performance of TSEQ. Furthermore, in a HetNet environment, we find that CS-AIM provides an attractive alternative to TBSD and LLR-E with a significantly reduced CoMP-specific front-haul rate requirement.

• 한국정밀공학회지
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• 제14권12호
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• pp.66-72
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• 1997

This paper aims at reviewing the possibility application over normal or abnormal, detection used by AE and the wear characteristics of grinding process. In this study, when diamond bur in dentistry with chosen grinding conditions were tuned at grinding. The variation of grinding resistance and AE signal is detected by the use of AE measuring system. The tests are carried out in accordance with diamond burs and workpiece: arcyl and bovine. According to the experiment results, the following can be expected: AE has the possibility to detect the state normality and abnormality. Hpwever, the grinding resistance measuring can find it difficult to detect it. It can be accurately excepted from AE occurrence pattern in contact start point of diamond bur and bovine, grinding condition and derailment point. It is known that AErms is well compatible with grinding resistance. According to the increase of the material removal rate, the specific energy of the diamond bur is inclined to dectease and the grinding resistance has a tendency to increase.

• 농약과학회지
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• 제15권1호
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• pp.61-67
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• 2011

2010년에 청주, 충주-1, 충주-2, 강진, 예산, 그리고 영주에서 채집한 점박이응애의 bifenazate 약제 저항성을 확인 해 본 결과, 강진과 예산 개체군에서 각각 964.5배, 1130배의 높은 저항성을 나타내었다. 그리고 청주, 충주-1, 충주-2, 그리고 영주개제군에서는 낮은 저항성비를 나타내었다. Bifenazate 약제 저항성 점박이응애의 cytb 점 돌연변이인 G126S를 확인해 본 결과, 생물검정에서 높은 저항성을 보인 강진과 예산 개체군에서 G126S 점 돌연변이를 확인 할 수 있었다. 이와 같이, G126S 점 돌연변이는 bifenazate 약제 저항성을 가지는 점박이응애 선별에 아주 유용한 분자진단 마커로 이용될 수 있다. 두 가지 분자진단 방법인 quantitative sequencing(QS)와 PCR amplification of specific alleles(PASA)는 G126S 점 돌연변이를 잘 탐지하였다. 따라서 이러한 방법들은 야외 계통의 bifenazate 약제 저항성 형질 모니터링과 저항성 관리에 효율적으로 이용될 수 있을 것이다.

• 한국환경보건학회지
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• 제47권4호
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• pp.320-329
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• 2021

Background: Smoking exposure may be objectively assessed through specific biomarkers. The most common biomarker for smoking is cotinine concentration in urine, and setting an optimal cut-off point can accurately classify smoking status. Such a cut-off point for Korean adolescents has never been studied. Objectives: The aim of this study was to determine a cut-off point for urinary cotinine concentration for the discrimination of smoking in adolescents. Methods: Participants were adolescents aged 13~18 years who participated in the third cycle of the Korean National Environmental Health Survey. We used urine samples to confirm the level of cotinine concentrations. Smoking status was determined by self-reported questionnaire. We identified the optimal cotinine cut-off point for discriminating smoking status using receiver operating characteristic curve analysis. Results: Of the 904 participants, 28 (3.1%) were smokers, among whom 20 (71.4%) were male. The median urinary cotinine concentrations in smokers was 218 ㎍/L (male: 215 ㎍/L, female: 303 ㎍/L), and that in non-smokers was 1.31 ㎍/L (male: 1.46 ㎍/L, female: 1.18 ㎍/L). We found significant differences in urinary cotinine concentration according to smoking status and sex (p<0.001). Urinary cotinine concentrations performed well for identifying smoking adolescents [area under the curve: 0.954 (male: 0.963, female: 0.908)]. The cut-off that optimally distinguished smokers from non-smokers was 39.85 ㎍/L (sensitivity: 89.3%, specificity: 97.4%). Male [39.85 ㎍/L (sensitivity: 90.0%, specificity: 94.9%)] had a different optimal cut-off point than female [26.26 ㎍/L (sensitivity: 87.5%, specificity: 99.6%)]. Conclusions: This study determined a cut-off point for urinary cotinine of 39.85 ㎍/L (male: 39.85 ㎍/L, female: 26.26 ㎍/L) to distinguish smokers from non-smokers in adolescents.

• 대한조선학회논문집
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• 제61권3호
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• pp.143-151
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• 2024

In this study, we present a mapping framework for 3D spatial reconstruction of digital twin model using navigation and perception sensors mounted on an Autonomous Surface Vehicle (ASV). For improving the level of realism of digital twin models, 3D spatial information should be reconstructed as a digitalized spatial model and integrated with the components and system models of the ASV. In particular, for the 3D spatial reconstruction, color and 3D point cloud data which acquired from a camera and a LiDAR sensors corresponding to the navigation information at the specific time are required to map without minimizing the noise. To ensure clear and accurate reconstruction of the acquired data in the proposed mapping framework, a image preprocessing was designed to enhance the brightness of low-light images, and a preprocessing for 3D point cloud data was included to filter out unnecessary data. Subsequently, a point matching process between consecutive 3D point cloud data was conducted using the Generalized Iterative Closest Point (G-ICP) approach, and the color information was mapped with the matched 3D point cloud data. The feasibility of the proposed mapping framework was validated through a field data set acquired from field experiments in a inland water environment, and its results were described.

• Bulletin of the Korean Chemical Society
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• 제32권5호
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• pp.1630-1634
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• 2011

Electroless plating of metallic nickel on carbon fiber surfaces was carried out to control specific electric resistivity of the fibers, and the effects of the nickel content and coating thickness on the electric properties were studied. The structural and surface properties of the carbon fibers were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The specific resistivity of the fibers was measured using a four-point probe testing method. From the XPS results, the oxygen and Ni atomic ratio of the fibers was greatly enhanced as the plating time increased. Additionally, it was observed that the specific electric resistivity decreased considerably in the presence of metallic nickel particles and with the formation of nickel layers on carbon fibers.

• International Journal of Fluid Machinery and Systems
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• 제2권1호
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• pp.80-91
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• 2009

In this study, a prediction theory for specific noise that is the overall characteristic of the fan has been proposed. This theory is based on total pressure prediction and broadband noise prediction. The specific noises of two forward curved fans with different number of blades were predicted. The flow around the impeller having 120 blades (MF120) was more biased at a certain positions than the impeller with 40 blades (MF40). An effective domain of the energy conversion of MF40 has extended overall than MF120. The total pressure was affected by the slip factor and pressure loss caused by the vortex flow. The suppression of a major pressure drop by the vortex flow and expansion of the effective domain for energy conversion contributed to an increase in the total pressure of MF40 at the design point. The position of maximum relative velocity was different for each fan. The relative velocity of MF120 was less than that of MF40 due to the deviation angle. The specific noise of MF120 was 2.7 dB less than that of MF40 due to the difference in internal flow. It has been quantitatively estimated that the deceleration in the relative velocity contributed to the improvement in the overall performance.