• 유기물자원화
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• 제21권3호
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• pp.99-107
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• 2013

본 연구에서는 축분자원화물의 총량관리지침에 의한 배출구조계수[(${\beta}4$), (${\beta}5$), (${\beta}8$)]를 산정하고자 축산농가 및 축분처리 현장시설을 방문하여 조사 및 분석하였으며 결과는 다음과 같다. 공공처리장 및 개별처리장에서의 폐수개별 삭감량 계수(${\beta}4$)는 수질분석항목인 BOD, COD, SS, T-N, T-P, TOC에 대하여 공공처리장은 0.94-0.75의 범위로 산정되었고, 개별처리장은 0.99-0.83의 범위로 산정되어 개별처리장이 더 높게 산정되었다. 폐수처리 농지환원량 계수(${\beta}_5$)의 경우 공공처리장이 0.40-0.24, 개별처리장이 0.75-0.16의 범위로 나타나 다른 처리방법보다 월등히 낮게 나타났다. 그렇지만, SS와 T-P의 경우는 개별처리에 의한 농지환원율이 공공처리에 의한 환원율보다 월등히 높게 나타났다. 공공처리량 계수(${\beta}_8$)를 산정한 결과 공공처리장에서의 축분자원화물의 처리는 T-P의 경우 공공처리량 계수(${\beta}_8$)의 평균치가 0.75로 나타났으나, 대부분 90%이상의 처리율을 보이며 0.2이하를 나타내는 처리장이 있는 등 처리장별로 편차가 큰 것으로 조사되었다.

• 한국광학회지
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• 제10권3호
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• pp.188-194
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• 1999

Mitsunobu 반응을 이용하여 전기광학계수 $\gamma_{33}$크고 열적 .시간적으로 안정적인 폴리이미드(polyimide)계고분자 용액인 PI-SOT(폴리이미드계 4-[N,N-bis(hydroxyethyl)amino­4'­($\beta$­cyano-$\beta$­methylsulfonyl)vinyl]azobenzene)고분자를 합성하였다. C.C. Teng의 단순반사법을 이용하여 코로나 폴링으로 극성 배향시킨 PI-SOT 박막의 전기광학계수 $\gamma_{33}$의 열안정성 및 시간안정성을 파장 632.8 nm와 852nm에서 측정하였다. 그 결과 상온에서 전기광학계수$\gamma_{33}$은 파장 632.8nm서 25.12 pm/V이고, 852 nmsns 5.40pm/V였다. 이 값들은 상온에서 60일 이상 장기간 안정적으로 유지되었으며, $100^{\circ}C$의 고온에서도 10시간내에서 6% 이내로 안정된 값을 유지하였다.

• 대한수학회논문집
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• 제11권1호
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• pp.81-87
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• 1996

We will construct polynomials of degree 6 in z and $\bar{z}$ on $C^2$ which gives, via its coefficient $\beta$ as a parameter, a family of pseudoconvex domains $\Omega_\beta$ in $C^2$ with the origin being a boundary point, and show that the domains $\Omega_\beta$ has no peak functions of class $c^1$ at the origin and has no holomorphic support functions for $1 \leq \beta < \frac{9}{5}$.

• 한국농촌간호학회지
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• 제10권1호
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• pp.17-29
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• 2015

Purpose: This study was done to examine factors affecting quality of life among community-dwelling elderly women who live in rural areas. Methods: The design of this research was cross-sectional descriptive study. The participants were 92 community-dwelling women aged 65 or older. Data were collected from November 1 to 15, 2013. ADL (Kart's Index), GDS-SF (Geriatric Depression Scale Short Form) and GQOL (Geriatric Quality of Life Scale) were used to measure variables. Data were collected using self-administered questionnaires and analyzed using descriptive statistics, Spearman's coefficient and stepwise multiple regression. Results: The participants' mean age was 77.5, and 85.9% had elementary school graduation or less education, and for 64.1%, their economic status was low. Spearman's rho coefficient analysis found that QOL was significantly associated with depression (r=-.72, p<.001), perceived health (r=.58, p<.001), regular exercise (r=.47, p<.001), education level (r=.29, p=.005), and ADL (r=-.21, p=.043). Multiple regression analysis showed that 65.9% of their QOL was explained by depression (${\beta}=-.72$), perceived health (${\beta}=.24$), ADL (${\beta}=-.16$), exercise (${\beta}=.22$) and number of diseases (${\beta}=.19$). Conclusion: These results indicate that older women who live rural areas need support for ADL, and prevention of depression to improve their quality of life.

• 한국세라믹학회지
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• 제29권7호
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• pp.533-538
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• 1992

Effect of Li2O.4B2O frit on the microstructural and thermal expansion behaviour of $\beta$-spodumene ceramics was investigated. With 4.0~8.0 wt.% frit addition, sintering temperature range was enlarged and densification was enhanced through liquid phase sintering. As the amount of frit addition was increased, thermal expansion coefficient was increased to 1.72$\times$10-6$^{\circ}C$-1 of its highest value, which indicated that the increment of thermal expansion coefficient due to the second phase was constrained.

• 한국구조물진단유지관리공학회 논문집
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• 제7권2호
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• pp.239-246
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• 2003

In the PCA Load Contour Method, the biaxial bending design coefficient of columns(${\beta}$) is based on the equivalent rectangular stress block (RSB). And coefficient of ${\beta}$ estimates the reinforcement index to be a influencing parameter on biaxial moment strength of RC columns without considering the arbitrary condition of bar arrangement. The experimental results of high strength concrete (HSC) columns subjected to combined axial load and biaxial bending moment were compared to the analysis results of RSB method. As result, the accuracy of RSB method is still acceptable for HSC columns and, as the reinforcement is placed densely in each corner of column section, the ${\beta}$ is decreased.

• 한국세라믹학회지
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• 제29권8호
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• pp.646-650
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• 1992

Effect of Li2O.4B2O3 frit addition on microstructural and thermal expansion behaviour of the $\beta$-spodumene ceramics made from kaolinite was investigated. With 2.0~4.0 wt% frit addition, the densification by liquid phase sintering caused low water absorption below 3% and enhancement of beding strength. As the amount of frit addition was increased, thermal expansion coefficient was increased to large scale, but in 2 wt% frit addition, its thermal expansion coefficient was constrained to 1.92$\times$10-6$^{\circ}C$-1.

• 한국세라믹학회지
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• 제29권2호
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• pp.127-135
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• 1992

It has been reported that natural petalite showed a low negative thermal coefficient and wide coefficient and wide coexisting region with liquid phase in Li2O-Al2O3-SiO2 system. Therefore, we investigated variation of microstructure and thermal and mechanical properties when the amount of SiO2 content in petalite compound and MgO addition to it compound were changed. As SiO2 content exceeded 80 wt%, crystal phases of $\beta$-cristobalite and $\beta$-spondumene solid solution were formed. Generally, the densification and bending strength were increased by the addition of MgO, but the positive thermal coefficient was found in the case of MgO 10 wt% addition because of second phase and glassy phase.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 추계학술대회 논문집
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• pp.170-170
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• 2009

From the analysis of current density-luminance-voltage characteristics of the double layered device in ITO/N,N'-diphenyl-N-N'bis(3-methylphenyl)-1,1'biphenyl-4,4'-diamine(TPD)/tris(8-hydroxyquinoline)aluminum($Alq_3$)/Al, we divided the conductive mechanism by four region according to applied voltage. We have obtained a coefficient of ${\beta}_{ST}$ in schottky region (I) is $4.14{\times}10^{-24}$ at the electric field of $3.2{\times}10^5$ V/cm, a slope in negative resistance region (II) appears negative properties decreasing the current density J for proportional in -1.58 square at a electric field of $7.3{\times}10^5$ V/cm. A coefficient of ${\beta}_{PF}$ in Poole-Frenkel region (III) is $8.28{\times}10^{-24}$ at the electric field of $8.4{\times}10^5$ V/cm, it was confirm어 that ${\beta}_{PF}$ is agrees with a value that relates with ${\beta}_{ST}$ such as ${\beta}_{PF}=2{\beta}_{ST}$ as the ${\beta}_{PF}$ and 2 ${\beta}_{ST}$ satisfied a theoretical prediction. And it was obtained a potential barrier of ${\Phi}_{FN}$ in Fower-Nordheim region(IV) is 0.3 eV at the electric field of $11.2{\times}10^5$ V/cm.

• 한국융합학회논문지
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• 제7권5호
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• pp.237-246
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• 2016

본 연구의 목적은 노인의 우울, 늙어감에 대한 행복감, 자아존중감, 생활만족도, 사회참여, 일상생활 활동장애 정도를 파악하고 노인의 우울에 미치는 요인들을 분석하는데 있다. 연구 자료는 기술통계, t-test, ANOVA, Pearson's Correlation Coefficient, Stepwise multiple regression analysis를 이용하여 분석하였다. 노인의 우울에 가장 영향이 높은 변수는 자아존중감 27.9%(${\beta}=-.318$, p<.001), 생활만족도 5.5%(${\beta}=-.248$, p<.001), 늙어감에 대한 행복감 4.1%((${\beta}=-.200$, p<.001), 일상생활 활동장애 1.6%(${\beta}=.128$, p=.026) 순으로 이들 네 개의 변수가 노인의 우울을 총 39.1% 설명하는 것으로 나타났다. 따라서 노인의 우울을 감소시키고 자아존중감과 늙어감에 대한 행복감을 향상시키기 위한 차별화된 교육프로그램을 개발하는 것이 필요하다.