• 한국산학기술학회논문지
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• 제8권5호
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• pp.1266-1272
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• 2007

본 연구는 육성돈에 있어 복합생균제 급여가 생산성, 영양소 소화율, 혈액성상 및 분뇨내 악취물질 발생량에 미치는 효과를 규명하고자 실시하였다. 육성돈 48두를 공시하였으며, 시험 개시시 체중은 20.12kg이었다. 시험설계는 1) CON (basal diet), 2) Pro1 (basal diet + 0.1% complex probiotics) and 3) Pro2 (basal diet + 0.2% complex probiotics)으로 총 3처리를 하여 처리당 8반복, 반복당 2두씩 완전임의 배치하였다. 사양시험은 6주간 실시하였다 전체 시험기간동안 일당증체량은 생균제 첨가 수준이 증가함에 따라 유의적으로 증가하였다(P<0.05). 그러나 생균제 급여는 일당사료섭취량 및 사료효율에 영향을 미치지 못하였다. 복합 생균제 급여는 건물 소화율을 증가시켰다(linear effect, P<.0.05). 또한 질소 소화율을 개선시켰으며, Pro 1 처리구가 가장 높게 나타났다(linear and quadratic effect, P<0.05). 생균제 급여는 혈액내 WBC, RBC, lymphocyte 및 BUN함량에 영향을 미치지 못하였다. 생균제 첨가 수준의 증가함에 따라 분뇨내 $NH_3-N$ 발생량은 감소하였으며(linear and quadratic effect, P<0.05), $H_2S$ 발생량은 감소하였다(linear and quadratic effect, P<0.05). 결론적으로 사료내 복합생균제의 첨가 급여는 생산성을 증가시켰으며, 분뇨내 악취물질 발생량을 감소 시켰다.

• Journal of Animal Science and Technology
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• 제63권6호
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• pp.1314-1327
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• 2021

Bacillus is characterized by the formation of spores in harsh environments, which makes it suitable for use as a probiotic for feed because of thermostability and high survival rate, even under long-term storage. This study was conducted to investigate the effects of Bacillus-based probiotics on growth performance, nutrient digestibility, intestinal morphology, immune response, and intestinal microbiota of weaned pigs. A total of 40 weaned pigs (7.01 ± 0.86 kg body weight [BW]; 28 d old) were randomly assigned to two treatments (4 pigs/pen; 5 replicates/treatment) in a randomized complete block design (block = BW and sex). The dietary treatment was either a typical nursery diet based on corn and soybean meal (CON) or CON supplemented with 0.01% probiotics containing a mixture of Bacillus subtilis and Bacillus licheniformis (PRO). Fecal samples were collected daily by rectal palpation for the last 3 days after a 4-day adaptation. Blood, ileal digesta, and intestinal tissue samples were collected from one pig in each pen at the respective time points. The PRO group did not affect the feed efficiency, but the average daily gain was significantly improved (p < 0.05). The PRO group showed a trend of improved crude protein digestibility (p < 0.10). The serum transforming growth factor-β1 level tended to be higher (p < 0.10) in the PRO group on days 7 and 14. There was no difference in phylum level of the intestinal microbiota, but there were differences in genus composition and proportions. However, β-diversity analysis showed no statistical differences between the CON and the PRO groups. Taken together, Bacillus-based probiotics had beneficial effects on the growth performance, immune system, and intestinal microbiota of weaned pigs, suggesting that Bacillus can be utilized as a functional probiotic for weaned pigs.

• 한국가정과교육학회지
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• 제12권3호
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• pp.93-104
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• 2000

The purposes of this study were to measure the levels of environmental consciousness. environmental knowledge, and environmental education performance and to find the influences of related variables on environmental education performance in Home Economics teachers. The researchers used a questionnaire consisting of three parts such as environmental consciousness. knowledge and education for 153 Home Economics teachers o secondary schools in Gwang-ju. The results are as follows: The level of environmental consciousness of the Home Economic teachers was high, but that of their environmental knowledge and the performance of environmental education were low. The teachers with more educational experience and married teachers showed higher level of environmental consciousness. Unmarried teachers showed higher level of environmental knowledge. The teachers with more age and educational experience showed higher level of environmental education performance. The teachers with more chances for getting environmental information had relatively higher level of environmental knowledge. The teachers with more educational experience and chance for getting environmental information and pro-environment community had relatively higher level of environmental education performance. With regard to environmental education experience older teachers getting environmental information pro-environment community and the teachers with higher level of environmental consciousness practiced more. Environmental knowledge, however, didn’t affect environmental education.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.337-342
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• 1999

Satellite images without value-added processing may be nothing but artistic painting. That is in order to benefit from satellite images acquired from money-drinking satellites, we should utilize the paramount information in scientific world and practical lift that can be extracted from image. Hence, the Satellite Technology Research Center has developed a integrated software called "Valadd-Pro". In this paper, the main components of the Valadd-Pro are briefly introduced, its value-added product are compared with PCI$^{\circledR}$ commercial software. Based on the results, the performance of the Valadd-Pro is superior to that of PCI$^{\circledR}$ on 6000$\times$6000 SPOT panchromatic images.

• 품질경영학회지
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• 제24권1호
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• pp.1-9
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• 1996

Ritchken(1985) analyzes free replacement and pro-rata warranty policies for products receiving renewable warranies. He shows that for constant failure rates pro-rata warranty policies are more attractive to risk-averse manufacturers than shorter term free replacement policies that result in the same average warranty cost. This paper considers the case when product lifetimes distributions are of phase-type. When this is so, Ritchken's performance measures can be simplified considerably. It is found, that irrespective of the pattern of failure rates, pro-rata warranty policies are preferable to free replacement policies. But the warranty period of the equivalent free replacement policy decreases and then increases, as product reliability(the average time between failures) increases.

• 한국전자통신학회논문지
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• 제5권6호
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• pp.664-671
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• 2010

본 논문에서는 지그비를 이용한 이동 로봇의 자율주행의 선행 연구로서, 메시 네트워크가 가능한 Zigbee Pro 표준안을 지원하는 CC2520을 기반으로 한 지그비 모듈을 개발하였다. 제작 후 성능 개선의 방법으로 지그비 무선 주파수 대역에 맞는 안테나를 네트워크 분석기를 이용하여 선택하였다. 또한 지그비 모듈의 임피던스 매칭을 실행하여 무선 통신의 가능한 송 수신 거리를 늘렸으며, 통신의 안정성을 확보하였다.

• International Journal of Advanced Culture Technology
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• 제9권1호
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• pp.218-223
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• 2021

Pervasive enhancement and required enforcement of the Internet of Things (IoTs) in a distributed massively multiplayer online architecture have effected in massive growth of Big-Data in terms of server over-load. There have been some previous works to overcome the overloading of server works. However, there are lack of considered methods, which is commonly applicable. Therefore, we propose a combing Sparse Auto-Encoder and Load-Balancing, which is ProGReGA for Big-Data of server loads. In the process of Sparse Auto-Encoder, when it comes to selection of the feature-pattern, the less relevant feature-pattern could be eliminated from Big-Data. In relation to Load-Balancing, the alleviated degradation of ProGReGA can take advantage of the less redundant feature-pattern. That means the most relevant of Big-Data representation can work. In the performance evaluation, we can find that the proposed method have become more approachable and stable.

• Journal of Preventive Medicine and Public Health
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• 제44권1호
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• pp.9-13
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• 2011

Objectives: Although increased reactive oxygen species (ROS) is caused by stress accelerates collagen degradation, there was no data on the relationship between stress and urinary hydroxyproline (Hyp) and proline (Pro), a good marker of collagen degradation. The purpose of this study was to evaluate the relationship between depression, anxiety, and stress (DAS) and concentrations of urinary Hyp and Pro. Methods: 97 hospital employees aged 20 to 58 were asked to fill out comprehensive self-administrated questionnaires containing information about their medical history, lifestyle, length of the work year, shit-work and DAS. Depression Anxiety Stress Scale (DASS) was applied to evaluate chronic mental disorders. Urine samples were analyzed using High Performance Liquid Chromatography (HPLC) with double derivatization for the assay of hydroxyproline and proline. Results: The mean value of Hyp and Pro concenturation in all subjects was $194.1{\pm}113.4\;{\mu}mol/g$ and $568.2{\pm}310.7\;{\mu}mol/g$. DASS values and urinary Pro concentrations were differentiated by sex (female > male, p < 0.05) and type of job (nurse > others, p < 0.05). In the stepwise multiple linear regressions, urinary Hyp and Pro concentrations were influenced by stress (Adjusted $r^2$ = 0.051) and anxiety and job (Adjusted $r^2$ = 0.199), respectively. Conclusions: We found that stress and anxiety were correlated with urinary Hyp and Pro concentrations. To identifying a definite correlation, further study in large populations will be needed.

• 상하수도학회지
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• 제30권6호
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• pp.755-764
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• 2016

Pressure retarded osmosis (PRO) processes can be implemented on a number of water types, using different technologies and achieving various power outcomes. In this study, Sewage facility effluent was used for feed solution of PRO and synthetic NaCl water for draw solution. This study was conducted to investigate effect of water quality of pretreatment on power density and flux decline in PRO process. The results show that organic and particulate foulants have to be removed for more stable operation. Flourescence technique with EEM enables to investigate the chemical properties of aquatic organic matter by extracting spectral information. Humic/fulvic matters and soluble microbial by-products were analyzed as the most affecting factors on the PRO performance. As a result of analyzing the whole system based on the energy consumption of the unit process, specific energy consumption(SEC) of the applicable technology for PRO pre-treatment should be about $0.2kWh/m^3$ or less.

• 한국의학물리학회지:의학물리
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• 제29권4호
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• pp.106-114
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• 2018

This study aimed to compare the performance of previous optimization algorithms against new a photon optimizer (PO) algorithm for intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) plans for prostate cancer. Eighteen patients with prostate cancer were retrospectively selected and planned to receive 78 Gy in 39 fractions of the planning target volume (PTV). All plans for each patient optimized with the dose volume optimizer (DVO) and progressive resolution optimizer (PRO) algorithms for IMRT and VMAT were compared against plans optimized with the PO within Eclipse version 13.7. No interactive action was performed during optimization. Dosimetric and radiobiological indices for the PTV and organs at risk were analyzed. The monitor units (MU) per plan were recorded. Based on the plan quality for the target coverage, prostate IMRT and VMAT plans using the PO showed an improvement over DVO and PRO. In addition, the PO generally showed improvement in the tumor control probability for the PTV and normal tissue control probability for the rectum. From a technical perspective, the PO generated IMRT treatment plans with fewer MUs than DVO, whereas it produced slightly more MUs in the VMAT plan, compared with PRO. The PO showed over potentiality of DVO and PRO whenever available, although it led to more MUs in VMAT than PRO. Therefore, the PO has become the preferred choice for planning prostate IMRT and VMAT at our institution.