• Animal Bioscience
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• 제34권6호
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• pp.1061-1069
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• 2021

Objective: This study was conducted to evaluate the effects of feed processing and particle size on growth performance, nutrient digestibility, carcass characteristics, and gastric health in growing-finishing pigs. Methods: A total of 360 growing pigs (22.64±0.014 kg initial body weight [BW]) were allocated to 1 of 6 treatments with 6 replicates by BW and sex, and 10 pigs were housed in one pen in a randomized complete block design. The BW and feed intake were recorded to calculate growth performance. For the digestibility trial, a total of 24 barrows with an initial BW of 33.65±0.372 kg were split into 6 treatments with a completely randomized design. Dietary treatments were designed by a 2×3 factorial arrangement of treatments based on two main factors, particle size (600, 750, 900 ㎛) and feed form (mash and pellet) of diet. Experimental diets were formulated to contain the requirements of the NRC (2012). Results: The BW and average daily gain were not changed by dietary treatments, and the feed intake of finishing pigs (wks 6 to 12) was increased when the pigs were fed a mash diet (p<0.05). For the overall period, the feed efficiency of pigs was improved with the pellet diet (p<0.01) and reduced particle size (p<0.05). The pellet diet had effects on increasing crude fat digestibility (p<0.01) relative to a mash diet, but there was no considerable change in dry matter and crude protein digestibilities by dietary treatments. In the evaluation of gastric health, a trend for an increased incidence of keratinization in the esophageal region was observed as particle size decreased (p = 0.07). Conclusion: Feed efficiency could be improved by pellet diet and reduced particle size. Nutrient digestibility, carcass characteristics, and gastric health were not affected by feed form, and particle size ranged from 600 to 900 ㎛.

• The Korean Journal of Physiology and Pharmacology
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• 제28권2호
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• pp.153-164
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• 2024

This study aimed to identify metabolic biomarkers and investigate changes in intestinal microbiota in the feces of healthy participants following administration of Lactococcus lactis GEN-001. GEN-001 is a single-strain L. lactis strain isolated from the gut of a healthy human volunteer. The study was conducted as a parallel, randomized, phase 1, open design trial. Twenty healthy Korean males were divided into five groups according to the GEN-001 dosage and dietary control. Groups A, B, C, and D1 received 1, 3, 6, and 9 GEN-001 capsules (1 × 10¹¹ colony forming units), respectively, without dietary adjustment, whereas group D2 received 9 GEN-001 capsules with dietary adjustment. All groups received a single dose. Fecal samples were collected 2 days before GEN-001 administration to 7 days after for untargeted metabolomics and gut microbial metagenomic analyses; blood samples were collected simultaneously for immunogenicity analysis. Levels of phenylalanine, tyrosine, cholic acid, deoxycholic acid, and tryptophan were significantly increased at 5-6 days after GEN-001 administration when compared with predose levels. Compared with predose, the relative abundance (%) of Parabacteroides and Alistipes significantly decreased, whereas that of Lactobacillus and Lactococcus increased; Lactobacillus and tryptophan levels were negatively correlated. A single administration of GEN-001 shifted the gut microbiota in healthy volunteers to a more balanced state as evidenced by an increased abundance of beneficial bacteria, including Lactobacillus, and higher levels of the metabolites that have immunogenic properties.

• 직업교육연구
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• 제29권3호
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• pp.309-334
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• 2010

글로벌 경제 전쟁 하에서 각 기업의 경쟁력은 효율적 인재개발에 의한 고성과 창출에 있다. 이에 최근 규모가 있는 선진화된 기업을 중심으로 기업의 비전과 전략에 기반한 구성원의 역량과 성과를 분석하고 역량모델을 개발하여 기업 내 인적자원 개발과 관리에 적극 도입하고 있는 추세다. 따라서 본 연구는 조직 구성원 역량진단을 위해 국내 기업에 도입되고 있는 역량모델에 대한 활용 정도를 살펴보기 위해 기업체에서의 역량모델의 개발 및 활용 실태 파악을 목적으로 설정하였다. 이를 위해 관련 전문가협의회, 자문위원회를 통해 설문 항목을 구성하여, 국내 기업들을 대상으로 설문조사를 실시하였다. 조사결과, 첫째 대부분의 기업들이 규모나 업종에 관계없이 주로 외부 모델을 벤치마킹하여 자체개발하거나, 외부컨설팅사의 부분적인 주도하에 개발된 역량모델을 사용하고 있어 기업특성에 맞는 역량모델 개발의 중요성이 시급하였다. 둘째는 역량모델 도입계기의 주요 이유가 근로자 역량강화에 있음에도 불구하고 개발된 역량모델을 인적자원관리 전 분야에 활용하지 못하고 있는 실정이므로, 역량모델 활용에 대한 한계를 극복할 수 있는 방안 마련이 필요하였다. 셋째는 기업의 역량모델 사후관리의 체계화에 대한 중요성이다. 이는 기업의 규모와 업종에 관계없이 다수의 기업이 업무환경 변화로 인하여 역량모델을 업그레이드 하거나, 또는 개발된 역량 모델을 아예 업그레이드 하지 않는 것으로 나타난 결과에서 찾아볼 수 있었다. 이 연구는 기업 현장에서 역량모델이 개발되고 활용되는 실태에 대한 초기연구인 만큼, 역량모델을 활용하고 있는 국내 기업의 내부 상황이나 조직 구성원의 특정 직급에 따른 심층 연구의 초석이 될 것이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 E
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• pp.1678-1680
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• 1998

The purpose of this study is to obtain optimum arrangement of phase conductors in minimizing magnetic field from overhead transmission lines. Data of the transmission lines rated 345 kV of the KEPCO(Korea Electric Power Company)'s system were used. For a three phase-double circuit transmission line, low-reactance arrangement is optimum in minimizing magnetic fields. For a three phase-four circuit, optimum phase arrangement is a-b-c-b-a-c(lower two circuits, clockwise)/b-c-a-c-a-b(upper two circuits, clockwise).

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.928-930
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• 1995

The power telecommunication network is a important base construction of power company. The requirements of power plant operation, office automation, subscriber services make it to go on evolution for new structure and advanced services. For these reasons its evolution strategy establishment is needed for systematical improvement. In this paper, we established the structure of power integrated information network which will be able to adapt international standard trends, to support original power prodection, to have competitive power in the telecommunication service market, and suggest evolution strategy schemes for stepwise development.

• 벤처창업연구
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• 제3권1호
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• pp.1-28
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• 2008

본 연구는 산업별 국내 벤처기업의 경영성과와 R&D 투자와의 상관관계에 대해 실증분석하고, 이를 통해 벤처기업의 경영성과와 R&D 투자와의 관계에 대한 일반 가설뿐만 아니라 산업별로 차이가 존재한다는 사실을 밝히고자 산업별 실증분석을 시도하였다. 이에 본 연구에서는 과학기술부의 "과학기술연구개발활동조사보고서"의 조사결과로 추출된 $2002{\sim}2006$년간의 패널데이터를 대상으로 8개 산업별 실증분석을 하였다. 산업분류는 패널 수의 제한 등으로 국가과학기술표준분류 체계(KSIC) 상 중분류(2-digit)까지로 제한하였다. 본 연구는 기존 연구에서의 연구개발활동 및 연구개발비 지출은 기업의 가치 내지는 생산성, 경영성과에 대체로 긍정적인 영향을 미치는 사실을 확인할 수 있었을 뿐만 아니라 기존 연구에서 부족했던 개별 산업별, 기업 규모별 차이 또한 증명하였다는 점에서 큰 특징이 있다. 더욱이 기존 연구에서는 볼 수 없었던 5년간의 일관성 있는 패널데이터를 분석에 이용하여, 지속적으로 연구개발활동과 경영활동이 이뤄지는 기업을 대상으로 연구를 수행함으로써 연구결과의 신뢰성을 높였다. 마지막으로 IMF 경제위기 이후 2002년부터 2006년까지 최근 데이터를 실증분석에 사용함으로써, IMF 이전의 선진국 추격형이 아닌 선진국 진입 단계에 있는 현상의 문제점들을 실증분석을 통해 제시하였다는데 큰 특징이 있다. 주요 실증분석 결과는 다음과 같다. 첫째, 자본금과 노동자 규모는 전체기업과 벤처기업의 경영성과와 양(+)의 상관관계를 가지는 것으로 나타났으며, 이는 분석 대상 8개 산업 모두에 적용된다 둘째, 기업의 설립년수는 특정 산업에 있어서는 전체기업과 벤처기업의 경영성과와 양(+) 또는 음(-)의 상관관계를 가지나, 전반적인 경향에 대해서는 판단하기 어렵다. 셋째, R&D 투자는 전반적으로 기업 경영성과에 긍정정인(+) 영향을 준다고 할 수 있다 넷째, 연구원 수는 전체기업 또는 벤처기업의 경영성과에 한 방향으로 영향을 미치는 요인이라 할 수 없다. 다섯째, 연구개발 노하우의 축적 등을 통해 기업의 경영성과에 긍정적인 영향을 미칠 것으로 가정되었던 연구소의 설립년수 또한 기업 경영성과에 긍정적인 요인으로 작용한다는 것이 전반적인 사실이라고 논할 수 없다.

• 기술혁신학회지
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• 제1권1호
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• pp.117-124
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• 1998

Corporations are pursuing maximum returns from their R&D investment. They are also interested in sound measures to quantify returns. In fact, they use various measures and criteria for measuring returns from the R&D investment. But the fundamental problem is that there is no generic and widely acceptable measures and criteria. To make things more complicated, measures are very powerful and influential to the people in the corporations. Herbert Simon already indicated that people do many things but people usually do their best for the only tasks which are measured. Many researchers, like Chester(1995), are interested in R&D productivity measures and risks because what the company measures really influence R&D people and output. This article present design concepts of the R&D project selection and evaluation system in POSCO(Pohang Iron & Steel Company). This is an output extract from the 6-month joint activities with POSRI(POSCO Research Institute) researchers and POSCO R&D personnel. Process changes, new organizations and new selection and evaluation criteria are developed to improve R&D performance and to enhance technology management of the POSCO. This article covers new selection and evaluation criteria only. We would like to share our experience about how we redesign the selection and evaluation of R&D projects. We also bring insights how we seamlessly integrate 4 different project selection and evaluation steps as a whole. We hope that this case will give you a clue to improve your R&D management.

• 무역상무연구
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• 제69권
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• pp.655-672
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• 2016

The main objective of this study is to examine the mediating effect of 'e-trust' on the relationship between the antecedents related to e-marketplace and the intention of using e-marketplace. Data was collected from a survey of 169 exporting firms in Gwangju, Korea. The results of the study are as follows ; First, 'e-trust' is produced a mediating effect when technology and government factors affect the intention of using e-marketplace. However, "e-trust" does not play a mediating role in the relationship between company factor and the intention of using e-marketplace. Second, technology factor, government factor and company factor have a positive impacts on the intention of using e-marketplace. Accordingly, in order to enhance the intention of using e-marketplace, small & medium exporting firms in Korea should try more to prepare for factors related to technology and company. In addition to these, government should give full support to be prepared for regulations and systems related to e-marketplace. If e-trust were properly built, the enhancement of using e-marketplace would be taken place more smoothly. So most of exporting firms can participate in e-marketplace more actively.

• Nuclear Engineering and Technology
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• 제38권3호
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• pp.277-284
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• 2006

In order to ensure the structural integrity of nuclear welded structures during design life, the fatigue life has to be evaluated by fatigue analysis procedures presented in technical codes such as ASME B&PV Code Section III. However, existing fatigue analysis procedures do not explicitly consider the presence of welded joints. A new fatigue analysis procedure based on a structural stress/fracture mechanics approach has been recently developed in order to reduce conservatism by erasing uncertainty in the analysis procedure. A recent review of fatigue crack growth data under various mean loading conditions using the structural stress/fracture mechanics approach, does not consider the mean loading effect, revealed some significant discrepancies in fatigue crack growth curves according to the mean loading conditions. In this paper, we propose the use of the stress intensity factor range ${\Delta}K$ characterized with loading ratio R effects in terms of the structural stress. We demonstrate the effectiveness in characterizing fatigue crack growth and S-N behavior using the well-known data. It was identified that the S-N data under high mean loading could be consolidated in a master S-N curve for welded joints.

• International journal of advanced smart convergence
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• 제9권3호
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• pp.17-27
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• 2020

With the continuous development and application of Internet technology, in recent years, new technologies such as cloud computing, big data, the Internet of Things, and AI are becoming more and more familiar to the general public. The development of a digital society has entered a new period of development. In this paper, we used on the 2018 annual data of 50 listed companies with blockchain concept stocks in China. Using data envelopment analysis (DEA) to study and analyze the input-output efficiency, it can be concluded that the input-output efficiency of 50 listed companies is very different. Inefficient companies are as high as 62%. Most companies have a large room for improvement in input-output efficiency due to uneconomical scale or inefficient technology. In order to better improve the company's input-output efficiency, one must improve the efficiency of resource utilization, optimize the company's research and development costs and the input and management of technical personnel; the second is to increase technological innovation and business innovation.