• 한국전기전자재료학회논문지
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• 제26권11호
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• pp.810-815
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• 2013

In this study, the capacitance and dielectric loss tangent of the silicone rubber which is combined with filler (30 phr~50 phr) have been measured on the range of 100 Hz~100 kHz and $30{\sim}170^{\circ}C$. It was found that when the frequency is 0.1 kHz~100 kHz and the silicone rubber is combined with 30 phr to 50 phr of filler, the capacitance of silicone rubber has increased by about 28.6 pF to 33 pF in 30 phr of filler, about 20 pF to 46.1 pF in 40 phr of filler and about 36.4 pF to 44 pF in 50 phr of filler. It seems that the volume of dielectric loss has gradually increased due to the temperature rise and the rotating of dipole in electric field through the electric dipole generated by the Si-O group which is induced by adding of filler, or the carbonyl group which is caused by oxidation. It seems that the dielectric dispersion in 0.1 kHz is caused by molecular motion of Siloxane group in main chain, and the dielectric dispersion in 10 kHz is caused by molecular motion of Methyl group in side chain.

• 디지털융복합연구
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• 제16권6호
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• pp.213-222
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• 2018

본 연구의 목적은 밸런스 테이핑 요법이 노인의 무릎 통증과 관절가동범위에 미치는 효과를 검증하고자 시도하였다. 연구방법은 비동등성 대조군 전후설계의 유사실험연구로 자료수집은 2014년 12월 5일부터 10일까지 시행되었다. 연구대상은 노인여가복지시설을 이용하며 무릎 통증이 있는 60세 이상의 노인을 대상으로 하였다. 실험군(n=21)에게는 슬관절 밸런스 테이핑을 적용하였고, 대조군(n=19)에게는 테이핑 적용을 하지 않았다. 두 군의 무릎 통증 및 관절가동범위를 중재 전, 중재 1시간 후, 중재 24시간 후에 측정하였다. 통계분석은 SPSS/WIN 21.0 프로그램을 이용하였으며, ${\chi}^2$ test, Fisher's exact test, Mann-Whitney test, t-test, 반복측정 분산분석을 실시하였다. 연구결과 대조군에 비해 슬관절 밸런스 테이핑 요법을 받은 실험군에서 무릎 통증이 유의하게 감소하였고(F=34.03, p<.001), 무릎 관절가동범위가 유의하게 증가하였다(F=7.83, p=.006). 본 연구를 통해 슬관절 밸런스 테이핑 요법이 노인의 무릎 통증에 적용 가능한 독자적인 간호중재임을 확인하였다.

• 한국광물학회지
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• 제16권1호
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• pp.1-17
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• 2003

유비철석 + 황철석 + 육방정계 자류철석으로 구성되는“삼종동시접촉”을 수반하는 유비철석의 화학조성은 광화작용의 II단계에서 유용한 지온계를 제공한다. 연구에 따르면 이 지온계는 황분압 f($S_2$)=$10^{-9.5}$ 기압하에서, 지온 T = $330^{\circ}C$에서 형성된 것으로 밝혀졌다. 황철석 -육방정계 자류철석 완충곡선에서는 이 두 변수가 T= $315∼345^{\circ}C$와 f( $S_2$)=$10^{-1}$0.5/∼$10^{-9}$ 기압에 해당됨을 보여 준다. 이지역에서 산출되는 안티모니를 포함하는 자류철석(Ic)는 무게 퍼센트가 4.95∼8.91에 달하는 상대적인 높은 간을 보이며, 철은 과다한 반면 양이온은 결핍되는 현상을 보인다. 자류철석에서 이러한 높은 안티모니 함량은 단일 입자내에서는 처음 알려진 것이다. 이러한 높은 안티모니 함량이 자류철석 Ic를 지온계로서 작용할 수 없게 만들었다. 광화작용 III단계에서의 4쌍의 자류철석과 섬아연석의 전자현미분석 결과는 T : $310∼340^{\circ}C$와 f(S2)=$10^{ }$$∼10^{-9}$ / atm을 보이며, 이 값은 Fe-As-S 계에서 추정된 값과 일치한다...

• Nuclear Medicine and Molecular Imaging
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• 제43권5호
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• pp.411-420
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• 2009

목적: 이 연구의 목적은 갑상선유두암 환자를 대상으로 재발의 진단에서 $^{18}F$-FDG PET/CT와 경부초음파검사를 함께 시행하는 것에 대한 유용성을 평가하고자 한다. 대상 및 방법: 2006년 12월부터 2008년 4월까지 갑상선유두암으로 갑상선 전절제술 및 고용량의 방사성옥소 치료를 시행 받은 환자 중에서 재발이 의심되어 $^{18}F$-FDG PET/CT를 시행한 51명(91건)을 대상으로 후향적으로 연구를 진행하였다. 의심되는 병소는 조직검사를 시행하였고, 조직 검사 결과와 PET 검사결과. PET/CT 검사결과, 경부초음파검사 결과를 비교하였다. 결과: $^{18}F$-FDG PET/CT (여자 57명, 남자 4명; 연령 범위, 24-81세, 평균 49세; 유두암 61개)의 민감도, 특이도, 정확도는 각각 환자 기준으로 87.2%, 59.0%, 77.0%였고, 병소 기준으로 92.3%, 64.1%, 80.2% 였다. $^{18}F$-FDG PET의 민감도, 특이도, 정확도는 각각 환자 기준으로 71.8% (P=0.03), 59.0% (p=1.00), 67.2% (p=0.03)였고, 병소 기준으로 78.8% (p=0.01), 64.1% (p=1.00), 72.5% (p=0.02)였다. 경부초음파검사의 경우 민감도, 특이도, 정확도는 각각 환자 기준으로 71.1% (p=0.07), 52.2% (p=0.75), 63.9% (p=0.08)였고, 병소 기준으로 71.2% (P<0.01), 61.5% (P=1.00), 67.0% (P=0.06)였다. $^{18}F$-FDG PET/CT 와 경부초음파검사를 함께 판독한 경우 민감도, 특이도, 정확도는 각각 환자 기준으로 94.7% (p=0.50), 82.6% (p=0.13), 90.2% (p=0.03)였고, 병소 기준으로 96.2% (p=0.50), 89.7% (p<0.01), 93.4% (p<0.01)였다. 결론: $^{18}F$-FDG PET/CT는 갑상선유두암의 재발 진단에서)$^{18}F$-FDG PET와 경부초음파검사와 비교하여 높은 민감도, 특이도, 정확도를 보였다. 게다가 $^{18}F$-FDG PET와 경부 초음파를 함께 시행한 경우 갑상선유두암의 재발 진단에 있어서 더욱 향상된 민감도, 특이도, 정확도를 보였다.

• Journal of Dairy Science and Biotechnology
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• 제37권4호
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• pp.237-246
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• 2019

참당귀잎 추출물을 일정비율로 첨가한 발효유를 제조하고, 이화학적 특성과 항산화능 및 관능평가 등 품질특성을 분석하였다. pH는 4.40-4.45 범위를 보였고, 산도는 0.96%-0.98%로 참당귀잎 추출물 첨가에 따른 유의적인 차이를 보이지 않았다. 점도는 참당귀잎 추출물의 첨가에 따라 다소 감소되는 경향을 보였지만, 저장중 안정성에는 영향을 주지 않았다. 유산균수는 참당귀잎 추출물의 첨가량 증가에 따라 다소 억제되는 경향을 보였지만, 0.1%-0.3%의 범위에서는 1.9×10⁹-3.2×10⁹ CFU/mL의 높은 수준을 보였다. 요구르트 중의 decursin 함량 분석은 0.1%-0.3%의 첨가량에 따라 0.26 ㎍/g, 15.23 ㎍/g 및 23.57 ㎍/g으로 비례하여 정량분석 되었다. 유기산 생성은 lactic acid의 생성량이 가장 높게 나타났으며, 첨가비율에 따른 유의성은 보이지 않았다. 요구르트의 항산화능은 참당귀잎 추출물의 첨가로 높게 나타났으며, 또한 첨가량이 증가할수록 항산화효과도 높게 나타나는 효과를 보였다. 관능평가 결과, 참당귀잎 추출물 0.1% 첨가구가 무첨가구와 유사한 수준으로 높게 평가되었으며, 0.2% 첨가구의 경우도 6.31-6.50의 보통이상 수준으로 평가되었다. 이상의 결과와 같이 참당귀잎 추출물의 첨가농도는 0.2% 이내 범위가 적합하였다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제55권4호
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• pp.199-203
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• 2006

This paper presents an ASER (Accelerated Soft Error Rate) integral model. The model is based on the facts that the generated EHP/s(electron hole pairs) are diminished after some residual range of the incident alpha particle, where residual range is a function of the incident angle and the capping layer thickness over the semiconductor junction. The ASER is influenced by the flux of the alpha particles, the junction area ratio, the alpha particle incident angle when the critical charge is same as the collected charge, and the sizes of the alpha source and the chip. The model was examined with 8M static RAM samples. The measured ASER data showed good agreement with the calculated values using the model. The ASER decreased exponentially with respect to the operational voltage. As the capping layer thickness increases up to $16{\mu}m$, the ASER increases, and after that thickness, the ASER decreases. The ASER increased as the depth of BNW increased from $0{\mu}m\;to\;4{\mu}m$. and then saturated. The ASER decreased as the node capacitance increased from 2fF to 5fF.

• 대한간호학회지
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• 제28권3호
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• pp.739-750
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• 1998

The purpose of this study was to identify the response patterns of Health Locus of Control (HLOC) and to analysis of the health promoting behaviors depending on the response patterns of HLOC in Korean adults. The sample was composed of 300 healthy adults ranged from twenties to seventies. In data analysis, SPSS PC/sup +/ program was utilized for descriptive statistics, pearson correlation, ANOVA and cluster analysis. The results of the study were as follows : 1. The average scores of HLOC in Korean were HLOC-I : 24.12(range 6-30), HLOC-P : .21.72, HLOC-C : 17.46. 2. The total mean score of the health promoting behavior scale was 2.50 (range 1-4), and the mean scores on the subscales were ; self actualization 2.60, health responsibility 2.14, exercise 2.28, nutrition 3.16, interpersonal support 2.74, stress management 2.15. 3. The HLOC-I and health promoting behavior were correlated positively(r =0.184, p=0.001), and the HLO-C and the health promoting behavior were correlated negatively(r=-0.102, p=0.039). The HLOC-P and the health promoting behavior weren't correlated in the level of statistical significance. 4. The response patterns of HLOC in Korean adults were identified 6 types, such as pure internal, pure chance, believers in control, yea sayer, nay sayer, and complex control. The type of believers in control and the type of yea sayer were subdivided in two different types. The believers in control was the largest group(33.67%), and yea sayer was the next large group(26.33%). The pure chance and the complex control type was the smallest groups. 5. There was a significant difference in health promoting behavior depending on the response patterns of HLOC(F=2.67, p=0.010). There were also significant differences in 4 subscales of health promoting behavior : self actualization(F=3.12, P=0.003), health responsibility(F=2.15, P=0.038), nutrition(F=5.08, p=0.000), and interpersonal support(F=2.26,p=0.029). These results suggest that the response patterns of HLOC is the important factor to predict the level of health promoting behavior in Korean adults.

• 한국산업보건학회지
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• 제19권1호
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• pp.8-15
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• 2009

This study was examined to find out asbestos exposure level the factors which affected the level at asbestos abatement sites. We visited a total of thirteen building demolition sites(3 apartments, 3 schools, 4 stores, and 3 houses) were visited to collect samples and related data from August to November, 2006. The results of this study were as follows 1. The results of an analysis of bulk samples to identify types of asbestos at the asbestos abatement sites showed that the kinds of the asbestos detected were chrysotile by 50.0%, were tremolite by 2.6%, and were the contents of chrysotile by 3 to 20%. 2. The geometric mean concentration of asbestos was 0.007 f/cc(range 0.001-0.34 f/cc) and its geometric standard deviation was 5.83. Of the samples, however, 12 exceeded the Korean Occupational Exposure Limit(0.1f/cc). 3. Of the materials, textile material had the highest concentration with geometric mean of 0.016 f/cc. When asbestos-containing materials were removed using T type tools, the geometric mean concentration of asbestos was 0.061 f/cc. The level by this method was much higher than by other removal methods. In analysis by the type of building, the geometric mean concentration of asbestos in stores was 0.042 f/cc and was higher than in other buildings. 4. The Poisson regression analysis was applied to find out the factors that affect the airborne asbestos concentration. As a result of the analysis, removal using a T type tool was the most important factor affecting the asbestos concentration(p<0.01). In conclusion, the airborne asbestos concentration(geometric mean) in asbestos abatement sites was 0.007 f/cc(0.001~0.34 f/cc), and 12(14.6%) of all samples were over the 0.1 f/cc. These results showed that asbestos abatement workers have been exposed to the high level of airborne asbestos because they have not been keeping asbestos removal rule. In accordance with increases of the number of building demolition sites, the better government regulation on asbestos abatement methods should be made and be performed well at building demolition sites.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 춘계학술대회 논문집
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• pp.653-656
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• 1999

Effect of $Al_2O_3$ Additives on Microwave Dielectric Properties of $0.15(Ba_{0.85}Ca_{(0.15-y)}Mg_y)$-0.125 $Nd_2O_3-0.60TiO_2+10wt%Bi_zO_3$ (y=0.05, 0.08) Ceramics was investigated. To control of $\tau\;{f}$ on microwave dielectric properties of $0.15(Ba_{0.85}Ca_{(0.15-y)}Mg_y)$-0.125 $Nd_2O_3-0.60TiO_2+10wt%Bi_zO_3$ ceramics $Al_2O_3$ was doped in the composition range of 0 to 0.15 wt%. As a result, dielectric constant was decreased from 94 to 80 but $Q\cdot{f}_0$ value was increased from 4980 to 5210 GHz and temperature coefficient of resonant frequency can be controlled from +9 to -10$ppm^\circ{C}$ as an increase of$Al_2O_3$ doping concentration. Especially, a new microwave dielectric material having $\varepsilon\;_r=84,\;Q\cdot{f}_0=5120\;GHz\;and\;\tau_f=0\;ppm/^\circ{C}$ was obtained at $Al_2O_3$ doping concentration of 0.08 wt%.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제51권7호
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• pp.305-310
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• 2002

The microwave dielectric properties of Ba(Mg$_{1}$3/Ta$_{2}$3/O$_3$-Ba(Co$_{1}$3/Nb$_{2}$3/O$_3$[BMT-BCN] ceramics were investigated. The specimens were prepared by the conventional mixed oxide method with the sintering temperature of 15$25^{\circ}C$~1575$^{\circ}C$. It was found that Ba(Mg$_{1}$3/Ta$_{2}$3/O$_3$[BMT] and BCN formed a solid solution with complex perovskite structure. As increasing the mole fraction of BCN, dielectric constant increased while the temperature coefficient of resonant frequency was changed from positive to negative value. The highest value of quality factor, Q$\times$f$_{0}$=138,205GHz, obtained in the 0.9BMT-0.1BCN ceramics sintered at 1575$^{\circ}C$. In the range of x$\geq$0.4, the dielectric constant was about 30. The 0.55BMT-0.45BCN ceramics sintered at 15$25^{\circ}C$ for 5 hours showed the microwave dielectric properties of $\varepsilon$$_{r}$=30.21, Q$\times$f$_{0}$=85,789GHz and $\tau$$_{f}$=2.9015ppm/$^{\circ}C$.EX>.