• Korean Journal of Health Education and Promotion
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• v.31 no.3
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• pp.97-108
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• 2014

Objectives: This study purposed to identify the factors influencing health promotion behavior in college students. The research design was descriptive study. Methods: Data were collected through structured questionnaires. The participants of this study were 368 college students in B & U metropolitan city and C city. Data were collected from October 5 to October 20, 2013. The data were analyzed using t-test, ANOVA, Scheffe's test, Pearson's correlation coefficients, and Stepwise multiple regression with SPSS WIN v 20.0. Results: The mean scores of psychosocial stress, self-efficacy, perceived health status, health promotion behavior were $1.05{\pm}0.45$, $2.97{\pm}0.41$, $3.45{\pm}0.74$, $3.35{\pm}0.47$ respectively. Factors influencing health promotion behavior of the participants were found to be psychosocial stress, ways to relieve stress, age, self-efficacy, perceived health status and spending money. These factors explained 47.8% of variance in the participants' health promotion behavior. Conclusions: Based on this program, we suggest that nursing intervention programs enhancing psychosocial stress, self-efficacy, and perceived health status for college students should be developed to improve their health promotion behavior.

• Asian-Australasian Journal of Animal Sciences
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• v.26 no.2
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• pp.260-265
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• 2013

The purpose of this study was to investigate the dietary effects of persimmon peel (PP) and PP ethanol extract (PPE) on egg production, egg quality, and liver lipids in the late stage of egg production in laying hens. One hundred and twenty 50-wk-old Hy-Line Brown layers (n = 120) were fed different diets. Four replicate groups of 6 hens each were randomly assigned to 5 dietary treatments. The 5 dietary treatments were as follows: i) CON, basal diet; ii) PP 0.15, CON+0.15% PP (0.035% tannin); iii) PP 0.5, CON +0.5% PP (0.117% tannin); iv) PPE 0.075, CON+0.075% PPE (0.03% tannin); and v) PPE 0.25, CON+0.25% PPE (0.11% tannin). The total tannin concentration of PPE was higher (p<0.05) than that of PP. Egg production in the PP 0.5 group was higher than in the other groups. Egg production and mass of hens in the PPE 0.25 group showed a greater decrease than that in the other groups (p<0.05). Eggshell color in the PP 0.15, PP 0.5, and PPE 0.075 groups was lighter than that of the control group (p<0.05). The Haugh unit for the groups that were fed PP and PPE were significantly higher than that in the other groups after 7 d of storage (p<0.05). Therefore, PP seems an effective feed additive for improving the production performance and egg quality in late stage laying hens.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.9
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• pp.3987-3992
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• 2014

Curcumin, a polyphenol compound derived from the rhizome of the plant Curcuma longa L. has been verified as an anticancer compound against several types of cancer. However, understanding of the molecular mechanisms by which it induces apoptosis is limited. In this study, the anticancer efficacy of curcumin was investigated in human gastric adenocarcinoma SGC-7901 cells. The results demonstrated that curcumin induced morphological changes and decreased cell viability. Apoptosis triggered by curcumin was visualized using Annexin V-FITC/7-AAD staining. Curcumin-induced apoptosis of SGC-7901 cells was associated with the dissipation of mitochondrial membrane potential (MMP) and the release of cytochrome c into the cytosol. Furthermore, the down-regulation of Bcl-2 and up-regulation of Bax that led to the cleavage of caspase-3 and increased cleaved PARP was observed in SGC-7901 cells treated with curcumin. Therefore, curcumin-induced apoptosis of SGC-7901 cells might be mediated through the mitochondria pathway, which gives the rationale for in vivo studies on the utilization of curcumin as a potential cancer therapeutic compound.

• Korean Journal of Materials Research
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• v.26 no.6
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• pp.347-352
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• 2016

ZnO with wurtzite structure has a wide band gap of 3.37 eV. Because ZnO has a direct band gap and a large exciton binding energy, it has higher optical efficiency and thermal stability than the GaN material of blue light emitting devices. To fabricate ZnO devices with optical and thermal advantages, n-type and p-type doping are needed. Many research groups have devoted themselves to fabricating stable p-type ZnO. In this study, $As^+$ ion was implanted using an ion implanter to fabricate p-type ZnO. After the ion implant, rapid thermal annealing (RTA) was conducted to activate the arsenic dopants. First, the structural and optical properties of the ZnO thin films were investigated for as-grown, as-implanted, and annealed ZnO using FE-SEM, XRD, and PL, respectively. Then, the structural, optical, and electrical properties of the ZnO thin films, depending on the As ion dose variation and the RTA temperatures, were analyzed using the same methods. In our experiment, p-type ZnO thin films with a hole concentration of $1.263{\times}10^{18}cm^{-3}$ were obtained when the dose of $5{\times}10^{14}$ As $ions/cm^2$ was implanted and the RTA was conducted at $850^{\circ}C$ for 1 min.

• Asian-Australasian Journal of Animal Sciences
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• v.12 no.5
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• pp.728-734
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• 1999

Thirty new born crossbred (Bos taurus${\times}$Bos indicus) calves, divided randomly in a $3{\times}2$ factorial design, were fed calf starters containing one of three protein sources i.e., groundnut cake (GN), cottonseed meal (CS) and meat and bone meal (MB) along with either raw (M) or gelatinized maize (MG) for 90d. Milk was fed upto 56d of age. Green oats and respective calf starters were offered from 14d of age onwards ad lib. Clinical profile of serum suggested significantly (p<0.05) higher albumin and lower alanine aminotransferase activity due to CS feeding. Alklaine phosphatase activity varied significantly (p<0.05) among dietary treatments showing interaction between protein and starch sources. Inclusion of gelatinized maize resulted in significantly higher concentration of serum globulin (p<0.05) and alkaline phosphatase activity (p<0.01). reduced (p<0.05) ruminal pH was accompanied by a significant decrease (p<0.01) in $NH_3-N$ concentration in the strained rumen liquor (SRL) of MG fed calves. Ruminal amylase activity was lower (p<0.05) on MG diets. Alanine aminotransferase activity in the rumen exhibited a significant (p<0.01) interaction between protein and starch sources. While feeding of CS significantly (p<0.01) reduced alanine aminotransferase activity, inclusion of thermally processed maize reduced (p<0.01) both aspartate and alanine aminotransferase activities in the rumen. The overall blood picture was similar among treatments, whereas rumen metabolites especially enzyme activities, seems to be altered with source of degradable protein an starch.

• Journal of the Korean Society for Nondestructive Testing
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• v.15 no.2
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• pp.371-377
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• 1995

By using ultrasonic waves, we obtained conclusion from the experiment for measuring joint axial force of high tension bolt. The conclusion is followed. : From the high tension bolts used at turbine of Thermoelectric Power Plant, we obtained the equation of calculating joint axial force that is ${\sigma}=\frac{{\Delta}BPD}{j{\times}{\Sigma}{\delta}}$. By using IBM PC, which is inputed by the equation for calculating joint axial force of high tension bolts, we got joint axial force of high tension bolts form beam path of ultrasonic waves. Furrther, we can identify that constitution of plant safety inspection system is possible.

• The Journal of Korean Academy of Prosthodontics
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• v.8 no.1
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• pp.56-64
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• 1968

저자(著者)는 구개도(口蓋圖)에 의(依)하여 한국어(韓國語) 마찰음(摩擦音)의 라, 사, 자, 차 사행(四行), 도합(都合) 40음(音)에 대(對)한 정당교합자(正堂咬合者) 오인(五人)과 부정교합자(不正咬合者) 십칠인(十七人)의 발음(發音)을 조사(調査)하여 다음과 같은 결과(結果)를 얻었다. 1) 라, 사, 자, 차 사행(四行)의 구개도(口蓋圖)는 V, H 및 C형(型)을 나타낸다. 2) 라행(行)의 구개도(口蓋圖)는 교합군(咬合群)에 관계(關係)없이 주(主)로 H형(型)을 보인다. 라행(行)에 있어서 전치(前齒)와 접촉부위간(接觸部位間)의 거리는 과개교합군(過蓋咬合群)에서 크고, 반대교하군(反對咬合群)에서는 작다. 3) 사행(行)은 주(主)로 V형(型)을 보이며 반대교합군(反對咬合群)에서만 C형(型)이 1/3정도(程度) 나타난다. 반대교합군(反對咬合群)에서의 V형(型)은 그 접촉부위(接觸部位)가 구치부(臼齒部)로 갈수록 두터워 진다. 4) 자, 차행(行)의 구개도(口蓋圖)는 라, 사행(行)에 비(比)하여 변화(變化)가 많다. a) 과개교합군(過蓋咬合群)은 H형(型)이 67%이고 나머지는 C형(型). b) 반대교합군(反對咬合群)은 거의 모두가 C형(型). c) 과개교합군(寡蓋咬合群)에서는 반이상(半以上)이 C형(型), 나머지는 H형(型)이나 간혹 V형(型)도 출현(出現)한다. 5) 구치부(臼齒部)에서의 측방반대교합(側方反對咬合)의 경우는 반대교합(反對咬合)이 있는 반대(反對)쪽의 접촉부위(接觸部位)가 넓다. 6) 과개교합군(寡蓋咬合群)에서의 접촉부위(接觸部位)는 정상군(正常群)이나 과개교합군(過蓋咬合群)에서 보다 일반적(一般的)으로 넓게 나타난다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.1
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• pp.22-31
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• 1997

The grain boundary etching method as a method for assessing degradation of structural materials has received much attention because it is simple, inexpensive and easy to apply to real components. In this study, the effectiveness of the method is verified by successfully applying the technique to in-service components of aged fossil power plants such as main steam pipes, boiler headers an turbine rotors. A new degradation parameter, intersecting number ratio (N$_{1}$/N$_{0}$), is employed. The intersecting number ratio (N$_{1}$/N$_{0}$) is defined as the ratio of intersection number (N$_{1}$) obtained from 5-minute picric acid etched surface to the number (N$_{0}$) obtained from nital etched surface. Two kinds of test materials, 2.25Cr-1Mo steel and 1Cr-1Mo-0.25V steel, were artificially thermal-aged at 630.deg. C in different levels of degradation., (N$_{1}$/N$_{0}$) were measured. And, correlations between the measured values and LMP values calculated from aging temperature and aging time were sought. To check the validity of the correlations obtained in laboratory, similar data were measured from service components in four old Korean fossil power plants. These on-site measurement data were in good correlation with those obtained in the laboratory.oratory.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.100-100
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• 2009

ZnO 바리스터는 정전기 및 순간적인 surge로부터 전자기기 및 전자회로 등을 보호하기 위해 개발된 전자 세라믹스 소재이다. 최근 전자기기 등의 고속통신 추세에 따라 ZnO 바리스터는 높은 비선형 특성과 함께 보다 낮은 유전율 및 유전손실 특성이 특별히 요구되고 있다. 따라서 본 연구에서는 현재 양산되고 있는 Bi-계와 Pr-계 ZnO 바리스터가 아닌 새로운 조성계를 이용하여 Y 첨가량(0.1~3.0 at%)에 따른 ZnO 바리스터의 전기적 특성과 유전 특성을 살펴보았다. 시편은 일반적인 세라믹 공정에 따라 제조하여 $1200^{\circ}C$에서 3 시간 공기 중에서 소결하였으며, 소결 및 전기적 특성과 유전 특성(밀도, 미세구조, I-V 특성, 유전율, 유전손실, ZnO grain 비저항)은 FE-SEM, Keithley237, Agilent 4294a 및 Agilent 4991a 장비를 사용하여 Y 함량에 따른 ZnO 바리스터의 특성 변화를 고찰하였다. 그 결과, Y이 2.0 at% 첨가한 계의 바리스터 특성이 가장 우수하였다. 보다 구체적으로 살펴보면 다음과 같다. Y 함량이 증가함에 따라 상대밀도는 94~96%로 증가하였으며, 평균입경은 증가하였다. 또한 유전율은 580~215 (at 1 MHz)로 Y 함량이 증가할수록 낮아졌다. 이를 통하여 새로운 바리스터 조성계에서 Y의 첨가 효과에 대하여 논하였다.

• Asian-Australasian Journal of Animal Sciences
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• v.27 no.11
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• pp.1663-1670
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• 2014

The objective of this study was to determine the perceptions and knowledge of farmers of heat stress and tick resistance in cattle. A cross-sectional survey was conducted and 110 farmers in four villages in the sour and sweet velds of the Eastern Cape Province, South Africa were interviewed. The associations among area (municipality), gender, age, level of education, employment and religion were computed using Chi-square tests. The majority of the respondents had on average 4 bulls, 4 cows, 4 heifers, 4 calves, and 4 oxen. Milk was considered as the major (28.3%) reason for keeping cattle. Most farmers owned non-descript (72.6%), and Nguni (45.3%) cattle because of their heat tolerance (54.7%), tick resistance (54.7%), and milking ability (28.2%) traits. Excessive panting (56.6%) and disease transmission (76%) were regarded as the major effects of heat stress and tick infestation in cattle, respectively. About 50% of the respondents agreed that hair length influences tick resistance and 47.17% considered coat colour when acquiring cattle. In the sampled areas, ticks were prevalent in the summer season (93%), and 77.36% of the respondents use acaricides every fortnight. Gall sickness was reported to be a major problem in the cattle herds by 36.79% of the respondents. Our results showed that farmers in the two municipalities had knowledge of cattle adaptation to heat stress and tick resistance.