• Korean Journal of Veterinary Service
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• v.30 no.1
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• pp.43-49
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• 2007

Avian pneumovirus(APV), also known as avian rhinotracheitis(ARTV), affects both turkeys and chickens and is known to be the primary causative agent of turkey rhinotracheitis(TRT). The aim of this study was to establish the presence or absence of antibodies to APV by an enzyme-linked immunosorbent assay(ELISA) and confirm APV by a reverse transcriptase-polymerase chain reaction(RT-PCR). The tested serum and feces were collected from laying hens in Gyeongbuk province. The positive farms with antibody against APV by ELISA were 90(96.7%) of 93 and positive serum samples were 433(93.1%) of 465 different sera. By regional group, sera from Uiseong, Cheongsong and Bonghwa were noted as 100% positive and positive rates of samples from Yeongju, Andong and Yeongyang were 93.3%, 85.7% and 50%, respectively. However, APV was not detected in feces samples by RT-PCR.

• KCID journal
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• v.13 no.2
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• pp.283-292
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• 2006

The characteristics of nonpoint source pollutant loads in upstream of Nakdong River were studied through analysis of pollutant loads of 10 sub-watersheds divided based on administrative district. The discharge and pollutant concentration of each sub-watershed were collected from Nakdong-River Water Research Institute and Daegu Regional Environmental office, respectively. Pollution items analysed in this study were BOD, T-N and T-P. The delivery loads of the nonpoint source pollutions of each sub-watershed were calculated after analysing the concentration of the pollution of each site. Several points were found from the results. Firstly, in general, city areas including Sangju, Andong showed higher degree of nonpoint pollution than country areas including Cheongsong, Yeongyang. The sub-watersheds located upstream side, such as Yeongju, Bonghwa, Necessarily show better water quality than the sub-watersheds located downstream side, such as Mungyeong, Uiseong. This result indicates that a given pollution condition within the watershed can be more sensitive than location factor to the level of water quality. Secondly, the delivery load and area of watershed were not necessarily correlated in the sense of water quality, while the discharge was shown to be highly correlated to the delively load of pollution. Lastly, sewage and waste caused from population and livestock, as well as landuse factor, were found to significantly contribute to the water pollution. Alternative solutions for controlling pollution source, therefore, should be provided to meet target levels of water quality in these regions.

• Horticultural Science & Technology
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• v.29 no.2
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• pp.156-159
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• 2011

A new bright yellow gerbera (Gerbera hybrida Hort.), 'Sunmyo' was bred from a cross between red medium-gerbera 'Beauty' and yellow gerbera 'Tamara' in 2001. Characteristics trials were conducted three times from 2004 to 2006. Bred cultivar 'Sunmyo' showed bright yellow color (YG12B), black center, semi-double type, and middle size flower with stable flower shape. The average yield of 'Sunmyo' increased up to 37% (70.0 stems per year) as compared to control cultivar 'Biro' (51.0 stems per year). The vase life is 7.5 days. The survival rate is 85.0%, and days to first flowering are 95 in the plastic house passing the winter season.

• Journal of the Korea Safety Management & Science
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• v.22 no.2
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• pp.1-6
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• 2020

Apples are one of the most produced fruits in Korea, with 2,423,000 tons of fruits produced in Korea in 2018, of which 365,000 tons (MAF, 2018) account for about 15% of the total production. For quality safety after harvesting apples, the application of MA(modified atmosphere) packaging technology (Mostofi et. al., 2008) is being actively studied. In addition, the effects of functional packaging materials that have added functions such as fireproof, antibacterial, high-blocking, degradability, and far-infrared radiation have been studied (Chung et al., 2009). In addition, there are reports of the effects of quality changes (Park et al., 2007) and MA storage methods on the quality of apples by packing apples with functional MA films((Park et al., 2004). But there are only few reports on quality safety by analyzing the correlation between the change of reducing sugar and total sugar and preference during storage by packing Geochang, Yeongju, and Yesan apples in functional MA film. Therefore, this study aims to propose a method to secure the quality safety of apples by investigating the effect of sugar change on the preference of apples during storage by packing apples in three regions in functional MA films.

• Korean Journal of Agricultural Science
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• v.45 no.4
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• pp.871-878
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• 2018

The government of Gyeongbuk in Korea increased the financial input in the agricultural sector by 43% from 2008 through 2012. However, the productivity of the agricultural sector in Gyeongbuk rose only about 3.6% during the same period. This study evaluated the agricultural competitiveness of each city or county in Gyeongbuk using six evaluation indices (scale, productivity, finance input, location quotient, technical education, and total) and investigated the relationship between the indices and total values of agricultural productions. The results show that Sangju, Gyeongju, Andong, Uiseong, and Seongju have high competitiveness for the scale index. For the productivity index, Gimcheon, Mungyeong, Ulleung, Yeongju, and Seongju were highly evaluated. For the location quotient index, Yeongcheon, Uiseong, Cheongdo, Seongju, and Sangju have high competitiveness. Uiseong, Yeongdeok, Cheongsong, Gunwi, and Yeongyang were highly evaluated for the agricultural finance input index. For the agricultural technical education index, Chilgok, Sangju, Mungyeong, Uiseong, and Gyeongju have high competitiveness. Finally, Sangju, Euiseong, Yeongcheon, Gyeongju, and Andong were highly evaluated for the total competitive index, while Yeongdeok, Yeongyang, Goryeong, Uljin, and Cheongsong have a low competitiveness for the total competitive index. This study also found that out of five indices, scale, location quotient, and technical education indices have a positive and statistically significant effect on the total values of agricultural production. However, we did not find any statistically significant effect of the productivity and finance input indices on the total values of agricultural production. Hence, we can conclude that the government should focus their agricultural policy on scale, location quotient and education to improve total agricultural production.

• Journal of Engineering Education Research
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• v.21 no.4
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• pp.46-52
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• 2018

In general, lecture evaluation has been used in most universities as an important criterion to evaluate quality of education. This study is exploratory research on the predictors that determine lecture evaluation in college of engineering to give practical implications for improvement of engineering education. For the exploration of predictors of lecture evaluation, the data of lecture evaluation in A College of Engineering located in the metropolitan area was used, and Decision Tree Analysis was utilized as an analysis method. As a result, the characteristics of students turned out to be the most distinct predictor comparing with those of course and instructor at lecture evaluation in college of engineering. That is, as various elements other than teaching competency influence lecture evaluation in college of engineering, it is necessary to be more careful in evaluating quality of lecture or teaching competence. Thus, a follow-up study should be conducted to adjust the influence by the predictors that instructors can hardly control.

• The Korean Journal of Mycology
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• v.47 no.2
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• pp.113-120
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• 2019

We isolated endophytic fungal strains from the roots of three medicinal crops, Ligusticum chuanxiong, Angelica gigas, and Cnidium officinale, cultivated at Yeongju, Korea. The fungal strains were identified based on their morphological characteristics and molecular analyses of their internal transcribed spacer, large subunit rDNA, and beta-tubulin regions. Thereby, we identified three previously unrecorded endophytic fungal species, Dactylonectria pauciseptata, Rhizopycnis vagum, and Sistotrema sernanderi, in Korea. In this report, we describe the morphological characteristics and phylogenetic analyses of these three fungal species.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.2
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• pp.150-154
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• 2019

In the design of semiconductor integrated circuits, ESD is one of the important issues related to product quality improvement and reliability. In particular, as the process progresses and the thickness of the gate oxide film decreases, ESD is recognized as an important problem of integrated circuit design. Many ESD protection circuits have been studied to solve such ESD problems. In addition, the proposed device can modify the existing SCR structure without adding external circuit to effectively protect the gate oxide of the internal circuit by low trigger voltage, and prevent the undesired latch-up phenomenon in the steady state with high holding voltage. In this paper, SCR-based novel ESD(Electro-Static Discharge) device with the high holding voltage has been proposed. The proposed device has the lower triggering voltage without an external trigger circuitry and the high holding voltage to prevent latch-up phenomenon during the normal condition. Using TCAD simulation results, not only the design factors that influence the holding voltage, but also comparison of conventional ESD protection device(ggNMOS, SCR), are explained. The proposed device was fabricated using 0.35um BCD process and was measured electrical characteristic and robustness. In the result, the proposed device has triggering voltage of 13.1V and holding voltage of 11.4V and HBM 5kV, MM 250V ESD robustness.

• Communications for Statistical Applications and Methods
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• v.28 no.5
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• pp.425-445
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• 2021

A generalization of the log-logistic (LL) distribution called exponentiated log-logistic (ELL) distribution on lines of exponentiated Weibull distribution is considered. In this paper, based on progressive type-II censored samples, we have derived the maximum likelihood estimators and Bayes estimators for three parameters, the survival function and hazard function of the ELL distribution. Then, under the balanced squared error loss (BSEL) and the balanced linex loss (BLEL) functions, their corresponding Bayes estimators are obtained using Lindley's approximation (see Jung and Chung, 2018; Lindley, 1980), Tierney-Kadane approximation (see Tierney and Kadane, 1986) and Markov Chain Monte Carlo methods (see Hastings, 1970; Gelfand and Smith, 1990). Here, to check the convergence of MCMC chains, the Gelman and Rubin diagnostic (see Gelman and Rubin, 1992; Brooks and Gelman, 1997) was used. On the basis of their risks, the performances of their Bayes estimators are compared with maximum likelihood estimators in the simulation studies. In this paper, research supports the conclusion that ELL distribution is an efficient distribution to modeling data in the analysis of survival data. On top of that, Bayes estimators under various loss functions are useful for many estimation problems.

• Journal of Environmental Science International
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• v.31 no.1
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• pp.51-59
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• 2022

This study investigated the effects of participation in a forest therapy program on ego-resiliency and interpersonal relationships to strengthen the independent capabilities of children requiring protection. The participants were divided into two groups: the experimental group (n=87; age, 16.40±1.90 years) and control group (n=90; age, 16.97±1.39 years). The study was conducted from July to August 2020. The experimental group participated in a forest therapy program operated by the National Center for Forest Therapy, Yeongju, for 2 nights and 3 days, whereas the control group lived routine life. The participants' ego-resiliency and interpersonal relationships were tested at the beginning and end of the forest therapy program. In the experimental group, ego-resiliency was improved and interpersonal relationships were significantly altered. Therefore, forest therapy programs may serve as effective interventions that can positively affect the social adaptation and growth of protected children into healthy adults.