• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2008년도 춘계학술논문발표회 논문집
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• pp.151-154
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• 2008

The advanced technical data collected from home and abroad have properly been analyzed, so that they are useful to improve the photoelectric sensitivity tester. The results of this study have quickly been supplied to the related industry. Our research and development team has verified the response characteristics of the light-emitting and -receiving part of the photoelectric sensitivity tester in order to help the local manufacturer to study, develope and produce their photoelectric detectors.

• 대한인간공학회지
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• 제17권2호
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• pp.1-10
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• 1998

The objective of this study is to investigate hwnan operator's perceptual and psychophysical responses to vibrotactile stimulation on various parts of the hand. Using a small vibrotactile display, five different loci of the hand along with two other mechanical parameters consisting vibrotactile stimulations, which are vibration frequency and number of active contactors, were examined for the effects on absolute thresholds. All test variables were found to have significant effects on thresholds. It was observed that absolute threshold is a function of vibration frequency and number of active contactors. Tactile sensitivity was the greatest at the vibration frequency of 240 Hz, and the fingertip was found to be the most sensitive locus on the hand. The area of stimulation on the hand was also found to be significant in that the sensitivity increased with the number of active contactors. The results of the study generally supported those of other previous studies. It should also be noted, however, that the conclusions from the study should be limited to the absolute sensitivity, not to the suprathreshold intensities of normal everyday contact with the hands.

• 무역학회지
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• 제44권6호
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• pp.169-185
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• 2019

The purpose of this study is to analyze the structural relationships of perceived value, price sensitivity, and satisfaction between brand image and purchase intention of consumers who have experience of overseas direct purchase. This study collected questionnaires used to analyze these structural relationships. Using the R's plspm package, we analyzed the PLS (partial least squares) structural equation model. In order to examine the relationship between perceived value and price sensitivity, the research model was modified and analyzed. As a result, not only the adoption of the research hypothesis, but also the goodness of fit was higher than before the research model modifying, and the relationship between perceived value and price sensitivity was further verified. The modified research model has higher academic value, so it is necessary to select it as the final proposal model.

• 대한인간공학회지
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• 제17권1호
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• pp.1-9
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• 1998

The sensitivity of the emotion evoked visually by IAPS was attempted to be defined using EEG(electroencephalogram). Twenty university students were participated in this study. Their EEG was measured and analyzed in terms of frequency range such as delta, theta, alpha and beta wave. The results showed that alpha increased, but delta and beta decreased with positive emotional progress. Inter-variation between alpha and delta in F4 and beta variation in P3 were indicative of the evaluation sensitivity of human emotion.

• 소음진동
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• 제9권6호
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• pp.1152-1156
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• 1999

In this study, a fiber optic air-backed mandrel hydrophone has been constructed and performance of acoustic signal detection has been measured. The hydrophone is based on a Mach-Zehnder interferometer with 35 m of sensing fiber. The sensitivity is measured up to -128 dB re rad/$\mu$ Pa in range from 1.4 kHz to5 kHz. A system with this design of hydrophone may be applied to detect low frequency underwater acoustic signals.

• 한국안전학회지
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• 제16권4호
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• pp.160-167
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• 2001

Cracking in connote structures is one of the main issues of structural design next to ensuring the load-bearing capacity. Thermal analysis is used to prevent thermal mucking, but concrete properties are uncertain variable, and analysis results have uncertainty, too. In this study, sensitivity analysis is performed to investigate the effect of conductivity, specific heal and pouring temperature. The results show that lower conductivity and higher specific heat increase the maximum temperature and maximum tensile stress. The structure with internal restraint is mostly influenced by the change of conductivity and specific heat.

• Asia-Pacific Journal of Atmospheric Sciences
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• 제54권4호
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• pp.639-648
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• 2018

The pyranometer for observing the solar radiation reaching the surface of the earth is manufactured by various companies around the world. The sensitivity of the pyranometer at the observatory is required to be properly controlled based on the reference value of the World Radiometric Center (WRC) and the observatory environment; otherwise, the observational data may be subject to a large error. Since the sensitivity of the pyranometer can be calibrated in an indoor or outdoor calibration, this study used a CSTMUSS-4000C Integrating Sphere by Labsphere Inc. (USA) to calibrate the sensitivity of CMP22 pyranometer by Kipp&Zonen Inc. (Netherlands). Consequently, the factory sensitivity of CMP22 was corrected from $8.68{\mu}V{\cdot}(Wm^{-2})^{-1}$ to $8.98{\mu}V{\cdot}(Wm^{-2})^{-1}$, and the result from the outdoor calibration according to the observatory environment was $8.90{\mu}V{\cdot}(Wm^{-2})^{-1}$. After the indoor calibration of the pyranometer sensitivity, the root mean square error (RMSE) of the observational data at the observatory on a clear day without clouds (July 13, 2017) was $7.11Wm^{-2}$ in comparison to the reference pyranometer. After the outdoor calibration of the pyranometer sensitivity based on these results, the RMSE of the observational data was $1.74Wm^{-2}$ on the same day. Periodic inspections are required because the decrease of sensitivity over time is inevitable in the pyranometer data produced at the observatory. The initial sensitivity after indoor calibration ($8.98{\mu}V{\cdot}(Wm^{-2})^{-1}$) is important, and the sensitivity after outdoor calibration ($8.90{\mu}V{\cdot}(Wm^{-2})^{-1})$ can be compared to the data at the Baseline Surface Radiation Network (BSRN) or can be used for various studies and daily applications.

• 감성과학
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• 제10권3호
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• pp.393-402
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• 2007

본 연구는 제품디자인에 관련한 소비자의 선호와 감성이미지를 파악하여 선호감성이미지를 확인하고 이를 충족시키는 제품디자인요소를 추론하여 소비자가 원하는 디자인을 제공할 수 있는 가장 근본적인 가정인 제품디자인선호-감성이미지-디자인요소의 인과구조를 통해 소비자 감성 지향적 디자인방향에 대한 지침을 제공하고자 한다. 이를 위해 남성용면도기를 연구대상물로 선정하였고, 감성이미지단어들을 추출하기 위한 파일로트 테스트(pilot test)와, 감성이미지단어항목과 선호도를 측정하기 위해 의미차이법을 이용하여 설문을 구성하여 조사, 분석하였다. 결과에 따르면 남성용면도기 디자인전략으로는 소비자들은 남성용면도기제품을 "고급스럽고, 예쁘며, 안정적인" 감성이미지가 높을수록 선호하는데 이 이미지를 충족시키기 위해서는 "바디가 호형도 다각형도 아니고 재질이 스틸이고, 버튼이 푸시형이며, 재질이 스틸, 컬러는 갈색이 아닌 컬러"인 디자인요소가 디자인요소들간에 trade-off관계를 고려하여 조합되어져야한다. 본 연구는 이론적으로는 선호도-감성이미지-디자인요소의 인과 구조에 대한 연구에 기초를 제공하고 실무적으로는 소비자 감성 지향적 디자인을 전망할 수 있는 디자인 프로세스를 제공한다.

• Childhood Kidney Diseases
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• 제22권2호
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• pp.47-51
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• 2018

Purpose: Urinary tract infection (UTI) is one of the common infectious diseases in children. Several imaging modalities can be used to confirm the presence of acute pyelonephritis (APN). Among them the 99mTcdimercaptosuccinic acid renal scan (DMSA scan) is used as a gold standard for diagnosis. Ultrasonography technology is evolving. Therefore, in this study, we investigated the sensitivity and specificity of Power Doppler ultrasonography (PDU) compared to the results from the previous study. Methods: There were 260 patients included in this study, aged between 1 and 12 months old. The patients were admitted to the Yeungnam University Medical Center between January 2008 and December 2015. All patients underwent both DMSA scan and PDU within 5days of admission. Voiding cystourethrography (VCUG) was performed in 195 patients with abnormal DMSA scan or PDU. Results: The diagnostic sensitivity of APN using PDU was 45.5% and specificity was 85.5% in 260 patients following detection of a defect on DMSA scan that was defined as APN. The diagnostic sensitivity and specificity of PDU for VUR were 65.5 % and 60.1%, respectively. The diagnostic sensitivity and specificity of DMSA scan for VUR were 95.7% and 14.1%, respectively. Conclusion: PDU has a high specificity but low sensitivity, so there are limitations in using it to replace a DMSA scan for the diagnosis of APN in children. DMSA scan and PDU have different sensitivity and specificity in diagnosis of VUR, respectively. Therefore, we suggest that the sensitivity and specificity of each test can be helpful in diagnosing APN and VUR when used in conjunction.

• 경영정보학연구
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• 제4권2호
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• pp.133-153
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• 2002

인터넷 사용의 증가로 탐색비용이 낮아져 소비자들이 얻을 수 있는 정보의 양은 증가하였으며 가격에 대한 정보 또한 쉽게 취득하고 비교할 수 있게 되었다. 그 결과 동일제품을 취급하는 인터넷 쇼핑몰 간의 가격 경쟁이 심화되고 있으며, 소비자들은 제품 구매결정에 있어 다른 요소들보다 가격에 더욱 민감하게 반응하고 있다. 본 연구는 인터넷 쇼핑몰의 가격 경쟁을 줄일 수 있는 차별화 전략을 모색하고자 인터넷 쇼핑몰의 가격 민감도에 영향을 미치는 요인을 살펴 보았으며, 가격 민감도에 따라 선호서점에 대한 선택이 달라지는가를 분석해 보았다. 연구대상은 국내에서 가격 경쟁이 치열한 인터넷 서적시장을 선택하였으며 연구 방법은 인터넷 서점에서 구매 경험이 있는 소비자를 대상으로 설문조사를 실시하였다. 연구결과 가격민감도가 선호서점의 유형선택에 영향을 미치는 것으로 분석되었다. 본 연구는 인터넷 쇼핑몰의 가격민감도 영향요인을 도출하기 위한 탐색적인 연구란 점에서 의의가 있으며 향후 제품 특성 및 품질에 차이가 있는 비동질 제품 등 다양한 시장을 대상으로 한 연구가 수행되어야 할 것이다.