• 한국산학기술학회논문지
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• 제17권4호
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• pp.440-447
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• 2016

장기적인 글로벌 경기침체의 여파로 소비재 기반의 B2C 시장 외에 산업재 기반의 B2B 시장이 새로운 성장 동력으로 주목받고 있다. 고객과의 관계가 중요한 B2B 시장에서는 고객과의 관계에서 발생하는 효용을 기반으로 하는 관계가치가 중요하고, 국가나 조직의 제도적 특수성도 관계 및 관계가치에 영향을 준다. 특히, 한국과 대만의 B2B 시장에서 창출되는 고객과의 관계가치들을 도출하여 국가별 특수성을 비교하고 글로벌 B2B 시장의 관계가치와 비교하였다. 순차적 탐색 설계에 기반한 혼합방법론을 적용하여 분석한 결과, 한국과 대만의 B2B 시장에서 요구되는 관계가치의 6가지 유형(공급자 노하우, 서비스 지원, 출시시기, 전달 성능, 개인 상호작용 및 제품의 품질)을 도출하였다. 한국은 대기업 기반의 시장 특성을 가져 '공급자의 노하우'가 가장 중요한 관계가치로 인식되었고, 반면 대만은 중소기업 기반의 시장 특성을 가져 '서비스 지원'이 가장 중요한 관계가치로 도출되었다. 본 연구결과는 다른 아시아 개발도상국들도 B2B 시장에서 비즈니스 관계 개선을 위해 집중해야할 관계가치로 시사점이 있으며, 아시아 B2B 시장에서의 성공사례로 글로벌 시장으로 역으로 적용될 수 있다는 점에 의의가 크다.

• Preventive Nutrition and Food Science
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• 제9권2호
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• pp.183-186
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• 2004

Various myoglobin derivatives were manufactured in pork and beef ribeye in the laboratory and their colorimetric values were measured with a chromameter. The average values of L＊ and a＊ of pork pigments were higher and b＊ values were lower than those of beef pigments. Oxymyoglobin (bright red) is considered to be a desirable fresh red meat pigment for consumer acceptance. The means of L＊, a＊ and b＊ values of oxymyoglobin were 36.41, 27.32 and 4.71 for pork and 30.54, 25.58 and 9.81 for beef, respectively. Nitrosyl hemochrome, the pigment of processed meat products like sausages and hams had L＊, a＊ and b＊ values of 47.93, 26.85 and 6.63 for pork and 41.82, 23.19 and 11.82 for beef. It was found that as a discoloration developed in meat and the meat color turned to brown, the L＊, b＊ values increased and the a＊ value decreased.

• 한국임상약학회지
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• 제9권1호
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• pp.19-26
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• 1999

Adequate nutrition is important in maintaining optimal health. Malnutrition can expose individual to increased risks of morbidity and mortality. The purposes of this study were to determine the basal energy expenditure (BEE) of Korean healthy subjects and TPN patients using Bioelectrical Impedance Analysis (BIA) method and to compare these values with those predicted by Harris-Benedict equation (H-B). BEE values measured by BIA were compared with predicted BEE values by the H-B formula in 59 clinically stable TPN patients and 65 healthy volunteers. In healthy volunteers and TPN patients, statistically significant differences were not shown between the BEE values measured by BIA (1392.5 Kcal and 1325.9 Kcal) and those predicted by H-B formula (1384.1 Kcal and 1270.1 Kcal). In male volunteers, statistically significant differences were not shown between BEE values measured by BIA (1670.7 Kcal) and the H-B formula (1550.9 Kcal), but in female volunteers, statistically significant differences were shown between BEE values measured by BIA (1194.8 Kcal) and the H-B formula (1265.6 Kcal). In male TPN patients, statistically significant differences were shown between BEE values measured by BIA (1453.5 Kcal) and the H-B formula (1335.9 Kcal), but in female TPN patients, statistically significant differences were not shown between BEE values measured by BIA (1126.4 Kcal) and the H-B formula (1167.2 Kcal). In normal healthy volunteers, $90.8\%$ of BEE values measured by BIA and in TPN patients $89.8\%$ of BEE values measured by BIA were within $15\%$ of BEE values predicted by the H-B formula in non-obese subjects. In conclusion, BEE values predicted by H-B formula or measured by BIA can be applied to non-obese Koreans. However, these values should be confirmed with Indirect calorimetry for Koreans.

• 대한자기공명의과학회:학술대회논문집
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• 대한자기공명의과학회 2003년도 제8차 학술대회 초록집
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• pp.24-24
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• 2003

Purpose： It is known that diffusion-weighted MR imaging (DWI) is helpful in the evaluation of malignancy grading in brain tumor. This study was to evaluate the DWls with different b-values of various brain tumors in order to determine optimal b-values on 3T MR unit. Method： On a 3T MR unit, DWls with b-values of 1, 000, 3, 000 and 5, 000 s/mm2 were obtained in 20 patients of pathologically-proven brain tumors (7 metastases, 4 high grade gliomas, 2 Iymphomas, 2 low grade gliomas, 2 germinomas, and one each of germinoma, meningioma, hemangioblastoma and central neurocytoma. The overall image quality, contrast between normal brain parenchyma and tumor and signal intensities of solid and cystic components were comparatively evaluated among DWls with different b-values by visual inspection.

• 한국의학물리학회지:의학물리
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• 제21권1호
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• pp.52-59
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• 2010

요추 압박 골절이 있는 환자를 대상으로 1.5 T MR 기기에서 b value의 변화를 이용한 확산강조영상에서 압박 골절이 있는 요추의 신호대 잡음비와 현성 확산 계수가 어떤 변화를 나타내는지 알아보고자 하였다. 2008년 1월부터 2009년 11월까지 요추 MRI를 촬영한 환자 중에서 만성 골다공증으로 척추 압박 골절을 보였던 환자 30명을 대상으로 1.5T MR scanner를 이용하여 b value를 400, 600, 800, 1000, $1200\;s/mm^2$으로 점차 증가시켜가면서 확산강조영상을 각각 획득하였다. 각각의 b value로 획득한 확산강조영상에서 1~5번의 요추체중 척추 압박 골절이 있는 부위와 골절이 있는 부위의 위, 아래 추간판등 세 부위에서 신호대 잡음비를 측정하였고 각각의 b value로 획득한 ADC map 영상에서는 세 부위의 신호대 잡음비와 현성 확산 계수를 측정 하였다. 정량적 분석방법으로 b value $400\;s/mm^2$으로 획득한 확산강조영상과 ADC map영상을 기준으로 각각의 b value로 획득한 영상과 비교하였다. 정성적인 분석방법은 b value $400\;s/mm^2$ 확산강조영상과 ADC map영상의 1~5번의 요추체중 척추 압박 골절이 있는 부위의의 신호강도를 분석하여 이를 기준으로 각각의 b value를 증가시켰을 때의 확산강조영상과 ADC map영상에서 신호강도가 상대적으로 어떻게 변화하는지 알아보았다. 영상의 정량적 분석에서는 확산강조영상에서 b value가 증가함에 따라 척추 압박 골절이 있는 부위와 골절이 있는 부위의 위, 아래 추간판등 세 부위 모두 신호대 잡음비가 상대적으로 감소했다. ADC map영상에서는 b value가 증가함에 따라 척추 압박 골절이 있는 부위와 골절이 있는 부위의 위, 아래 추간판등 세 부위 모두 신호대 잡음비가 상대적으로 감소했다. ADC map영상에서 b value에 따른 관심영역의 현성 확산 계수는 b value가 증가함에 따라 척추 압박 골절이 있는 부위와 골절이 있는 부위의 위, 아래 추간판등 세 부위 모두 현성 확산 계수가 상대적으로 감소했다. 영상의 정성적 분석에서 b value를 $400\;s/mm^2$ 이상으로 증가시킴에 따라 척추 압박 골절이 있는 부위와 골절이 있는 부위의 위, 아래 추간판등 세 부위 모두 신호강도가 점차 감소하였고 b value를 $1,000\;s/mm^2$ 이상으로 했을 때에는 세 부위 모두 영상의 잡음이 매우 심했다. 또한 척추 압박 골절이 있는 부위는 상대적으로 위, 아래 추간판 보다 높은 신호강도를 보였다. 확산강조영상에서 b value를 증가시킴에 따라 척추 압박 골절이 있는 부위와 골절이 있는 부위의 위, 아래 추간판 등 세부위 모두 신호대 잡음비와 현성확산계수가 점차 감소하는 결과를 얻었고 향후 확산강조영상 검사 시 Multi b value를 사용하여 신호의 변화를 인지함으로서 여러 가지 척추질환으로의 적용에 도움을 줄 것이라 사료된다.

• Korean Journal of Radiology
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• 제22권6호
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• pp.922-930
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• 2021

Objective: It is uncertain why a b-value range of 1500-2000 s/mm² is optimal. This study was aimed at qualitatively and quantitatively analyzing the optimal b-value range of synthetic diffusion-weighted imaging (sDWI) for evaluating prostatic index lesions. Materials and Methods: This retrospective study included 92 patients who underwent DWI and targeted biopsy for magnetic resonance imaging (MRI)-suggested index lesions. We generated sDWI at a b-value range of 1000-3000 s/mm² using dedicated software and true DWI data at b-values of 0, 100, and 1000 s/mm². We hypothesized that lesion conspicuity would be best when the background (i.e., MRI-suggested benign prostatic [bP] and periprostatic [pP] regions) signal intensity (SI) is suppressed and becomes homogeneous. To prove this hypothesis, we performed both qualitative and quantitative analyses. For qualitative analysis, two independent readers analyzed the b-value showing the best visual conspicuity of an MRI-suggested index lesion. For quantitative analysis, the readers assessed the b-value showing the same bP and pP region SI. The 95% confidence interval (CI) or interquartile range of qualitatively and quantitatively selected optimal b-values was assessed, and the mean difference between qualitatively and quantitatively selected b-values was investigated. Results: The 95% CIs of optimal b-values from qualitative and quantitative analyses were 1761-1805 s/mm² and 1640-1771 s/mm² (median, 1790 s/mm² vs. 1705 s/mm²; p = 0.003) for reader 1, and 1835-1895 s/mm² and 1705-1841 s/mm² (median, 1872 s/mm² vs. 1763 s/mm²; p = 0.022) for reader 2, respectively. Interquartile ranges of qualitatively and quantitatively selected optimal b-values were 1735-1873 s/mm² and 1573-1867 s/mm² for reader 1, and 1775-1945 s/mm² and 1591-1955 s/mm² for reader 2, respectively. Bland-Altman plots consistently demonstrated a mean difference of less than 100 s/mm² between qualitatively and quantitatively selected optimal b-values. Conclusion: b-value range showing a homogeneous background signal may be optimal for evaluating prostatic index lesions on sDWI. Our qualitative and quantitative data consistently recommend b-values of 1500-2000 s/mm².

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 춘계학술대회논문집
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• pp.56-60
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• 2007

Nowadays shear wall structural system is gradually changing to framed structure. For this reason, lightweight panel is increasingly being used as separating walls. One of design methods to obtain high transmission loss is double panel. To predict the acoustic performance of double panel, prediction of transmission loss of single panel must be performed, previously. In this study, the predicted values for four single panels were compared with the measured values. The result shows the arithmetical average deviations(100Hz to 3150Hz) between the predicted and measured transmission loss were in range between 1.1dB and 3.9dB. The predicted values were generally lower than measured values above critical frequency. The single-number quantities, $R_W+C$, were predicted in range between 36dB to 38dB, and the differences of single-number quantities between the predicted and measured value were within 1dB.

• 환경위생공학
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• 제16권1호
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• pp.18-26
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• 2001

The increase of economic growth has brought out the noise pollutions in city regions. To evaluate these problems, this study was investigated to assessment and analysis of noise pollutions at Cheongju area in winter and summer seasons. The noise levels were measured and analyzed at the general areas the 4 roadside areas (park, residential, commercial, and industrial area). As a result, following facts have been found. The equivalent sound levels(Leq) at general are in winter were 51.3∼78.2 dB(A) at the daytime and 41.1∼63.1 dB(A) at the nighttime And in summer there were 53.5∼77.3 dB(A) at the daytime and 41.9∼64.0 dB(A) at the nighttime, respectively. These values were higher than average value of Korea. At the roadside area, the values of Leq were 51.9∼72.8 dB(A) at the daytime, 44.3∼68.2 dB(a) at the nighttime in winter, and in summer there were 62.5∼73.1 dB(A) at the daytime and 50.4∼68.3 dB(A) at the nighttime, respectively. These values were lower than average value of Korea. The calculated traffic noise index(TNI) were 64.6∼93.6 at the daytime and 26.5∼106.6 at the nighttime in winter, In summer, there were 65.0∼90.7 at the daytime, and 32.3∼91.8 at the nighttime. The TNI values varied wide ranges at the nighttime according to traffic volumes.

• 산업기술연구
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• 제29권B호
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• pp.73-80
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• 2009

This paper is to investigate effect of B.G.I (Best Grouting Innovation) method on reinforcing ground. In this thesis, extensive literature review was performed to summarize theoretical backgrounds of grouting and to compare the applicability of different grouting methods. Unconfined compression test with specimen prepared by injecting different grouts of B.G.I, S.G.R and L.W methods and by changing the curing time were carried out to figure out characteristics of initial unconfined compression strength mobilized in the early stage. As results of test, the compression strength increases with curing times and specimen prepared with grouts of B.G.I method show greater values than others. On the other hands, the measured values of pH are in the range of 7-10 during tests. In field, preliminary construction to main construction at several sites were performed to confirm the effect of reinforcing the ground by application of B.G.I method. From the results of permeability test in field, SPT test and phenol reaction test, it was found that N values after grouting are greater than those before grouting and values of permeability in grouted ground is reduced significantly.

• 패션비즈니스
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• 제5권2호
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• pp.67-72
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• 2001

Tencel fabric was treated with cellulase and softener. And then Mechanical properties were investigated. Basic characteristic values of clothing wearing were calculated. With the treatment of cellulase and softener treatment, WT, RT, LC, WC, RC of mechanical characteristics were increased, and G, 2HG, 2HG5, B, 2HB were decreased. B/W, $\sqrt[3]{B/W}$, $\sqrt{2HB/W}$, 2HB/B, W/T of Basic characteristic values of clothing wearing were decreased. WC/W, WC/T were increased, Therefore, drapability, crease resistance, pressing softness, air content were improved. In consideration of mechanical characteristics and basic characteristic values of clothing wearing depending on the softener, values of WT, WC/W, WC/T were bigger with the treatment of epoxy and snow softener than with the treatment of cation and blend softener. LC, WC, RC, B/W, $\sqrt[3]{B/W}$, $\sqrt{2HB/W}$, 2HB/B, W/T were bigger with the treatment of cation and blend softener than with the treatment of epoxy and snow softener. Thereofre, with the treatment of epoxy and snow softener, drapability, crease resistance, air content were improved. With the treatment of cation and blend softener, pressing softness were improved.