• Journal of Nutrition and Health
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• v.17 no.3
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• pp.210-216
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• 1984

The growth response, lipid deposition, fat free body mass and energy expenditure of weanling rats fed the equal amount of isocaloric diets containing 8%, 13% and 18% casein were investigated. After a period of 30day feeding, the rats fed low level of protein diet were 43.01g lighter than 18% protein group (weight gains of ${85.57}{\pm}{7.50g}$ vs. ${128.58}{\pm}{11.64g}$, p<0.01). Despite of the smaller body size, there were no significant differences in lipid deposition in grams per carcass. Whereas, nitrogen accumulation was significantly greater in 13% and 18% protein fed groups compared to 8%. The estimated energy expenditure were 4,576.61 kJ, 5,440.80kJ and 5,607.67kJ for 8%, 13% and 18% protein groups respectively. The part of excess energy consumed by the low protein group may have been dissipated. The malic enzyme activity in the liver of rats was found to be unaltered by different dietary treatments. From these observations, it was conluded that the retarded growth response in lower protein level may have been originated from the shortage ge of protein supply rather than that of the energy. The protein restriction appeared to be resulted in the lower fat free compartment without affecting the ability of rats to synthesize body lipid in a similar rate to the higher protein group when energy intakes were equalized.

• Journal of Korea Water Resources Association
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• v.30 no.1
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• pp.83-93
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• 1997

The purpose of the study is to analyze the sensitivity of the parameters that affect the runoff and water quality in the studied drainage basins. SWMM model is applied to the four drainage basins located at Namgazwa and Sanbon in Seoul and Gray Haven and Kings Creek in the USA. first of all, the optimum values of the parameters which have least simulation error to the observed data, are detected by iteration procedure. These are used as the standard values which are compared against the procedure. These are used as the standard values which are compared against the varied parameter values. In order to catch the effectiveness of the parameters to the computing result, the parameters are changed step by setp, and the results are compared to the standard results in flowerate and quality of the sewer. The study indicates that the discharge is greatly affected by the types of runoff surface, i.e., impervious area remarkably affects the peak flow and runoff volume while the surface storage affects the runoff volume at mild sloped basins. In addition, the major parameters affecting the pollution concentrations and loadings are the contaminant accumulation coefficient per unit area per time and the continuous dry weather days. Furthermore, the factors that affect the water quality during the initial rainfall period are the rainfall intensity, transport capacity coefficient and its power coefficient. Consequently, in order to simulate the runoff-water quality, it is needed to evaluate previous data in the research performed for the studied basins. To accurately estimated from the tributary areas and the rational computation methods of the pollutants calculation should be introduced.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.9 no.5
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• pp.141-155
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• 2014

This study examines the effect of previous work experience on the long-lived venture firm called 'Good Quality startup'. The research explores entrepreneurs of 16 mobile application startups that were invested by the venture capital, 'K-ventures', through the resource-based view. The results show that all of entrepreneurs had previous experiences of their business domain. They accumulated human resources such as technology capabilities, knowledge of domain, know-how, networking through learning-by-doing. Entrepreneur's human resources are the key factors for opportunity recognition and realisation process; and it is also on the ground that venture capital determines investment. Venture capital provides financial resources, management support and strong network for venture firm. Technology resources, financial resources, know-how and networking are the core managerial resources to be a long-lived venture firm called 'Good Quality Startup'. This research is an exploratory case study based on previous experience and 'good quality entrepreneurship'. The empirical study hereafter is needed.

• Journal of Convergence for Information Technology
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• v.9 no.12
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• pp.30-38
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• 2019

The purpose of this study is to analyze the level of competitiveness of semiconductor design firms of Korea. The categories of competitiveness are divided into product development, accumulated technology, market-related competencies, human resources, and management system. The sample of 73 semiconductor design companies were used, and the analysis data were gathered by parallel with the questionnaire and the surveyor visited. For respondents, importance of competitiveness factor was prioritized using nominal scale and the competitiveness of each item is expressed based on 100 points. It was confirmed that there was a difference between the order of importance and the actual level of core competence. The ranking of the importance of core competencies is in the order of product development, technical capability, market-related competencies, human resources, and management system. However, in terms of actual competitiveness in each category, human resources were the best, followed by the management level. The product development and technology competencies were in order. The market-related competitiveness was found to be the most urgently raised. In order to increase the market related competitiveness, a new customer base must be developed and the information acquisition capability of the customer, and the ability to analyze their data needs to be improved.

• Journal of The Korean Society of Grassland and Forage Science
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• v.5 no.2
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• pp.127-135
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• 1985

The effects of morphological development and environmental temperature on synthesis and accumulation behavior of cell-wall constituents were studied in maize cv. Blizzard and sorghum cv. Sioux and Pioneer 931 at Muenchen Technical University from 1979 to 1981. Various growth stages of maize and sorghum plants were grown on field and phytotron at 4 temperature regimes of 30/25, 25/20, 28/18 and 18/8 degree C and mid-summer sunlight over 13-hour days. The results are summarized as follow: 1. Cell-wall constituents in sorghum and maize plants were shown to have a great synthesis rates at early growth stage from growing point differentiation to final leaf visible. The highest concentration of cell wall contents were found at heading stage with 52-54% and 64-68% of neutral detergence fiber, and 30% and 45% of acid detergence fiber foe maize and sorghum, respectively. 2. The structural carbohydrates, cellulose and hemicellulose, were found as a main components of cell-wall constituents. Cellulose were mainly accumulated in stalks, while hemicellulose were an important cell wall components in leaves and panicle. 3. Synthesis rates of cell-wall constituents and non-strnctural carbohydrates were associated with increasing of temperature. Reserved carbohydrates such as fructosan, mono - and dissaccharose in plant were, however, declined when the temperature exceeded 30 deg C, during the accumulation of cellulose, hemicellulose and lignin were increased continuously. 4. Cell-wall constituents lowered digestibility and net energy accumulation in sorghum and maize plants. In a in vitro and in vivo trial, it was found a negative correlation between digestion dry matter and cell wall constituents, especially cellulose and lignin.

• Journal of Engineering Education Research
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• v.13 no.6
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• pp.57-71
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• 2010

This paper is a study on the perception of current competency and expected competency of engineering freshmen by extracting core competencies acquired from university education. It also aims to suggest proper way for engineering university education. This study extracts competencies in the following five areas as core competencies: 'knowledge on major area', 'cultural ability', 'foreign language ability', 'basic learning ability', 'intercommunication ability'. To achieve this purpose, this study surveyed 'C' university engineering department freshmen (584 students) with questionnaires about their perception of core competencies. The results are as follows. First, engineering freshmen perceived current competencies were weak in every area, especially their capacities in 'foreign language ability' area were perceived to be weakest. Their demand for education is the highest in 'foreign language ability' area, and the second higher in 'knowledge on major area'. Secondly, there exists meaningful difference between perception of current competency and expected competency depending on the gender, high school department (science/liberal arts), high school location, types of college admissions, and types of mathematics in NAST. According to these results, this study suggests enhancement of foreign language (English) education in engineering department, design and implementation of various educational program to overcome individual difference, promoting importance of competencies in the 'cultural abilty' and 'intercommunication abilty', necessity of continuous adjustment and complementation for engineering educational program through accumulation of feedback processes, activation of career education through engineering education and special programs.

• Journal of dental hygiene science
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• v.18 no.2
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• pp.69-75
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• 2018

The purpose of our study is to compare the adhesion and biofilm formation abilities of isolates from water discharged from dental unit waterlines (DUWLs). Bacteria were isolated from a total of 15 DUWLs. Twelve isolates were selected for the experiment. To confirm the adhesion ability of the isolates, each isolate was attached to a glass coverslip using a 12-well plate. Plates were incubated at $26^{\circ}C$ for 7 days, and the degree of adhesion of each isolate was scored. To verify the biofilm formation ability of each isolate, biofilms were allowed to form on a 96-well polystyrene flat-bottom microtiter plate. The biofilm accumulations of all isolates formed at $26^{\circ}C$ for 7 days were identified and compared. A total of 56 strains were isolated from 15 water samples including 12 genera and 31 species. Of the 56 isolates, 12 isolates were selected according to the genus and used in the experiment. Sphingomonas echinoides, Methylobacterium aquaticum, and Cupriavidus pauculus had the highest adhesion ability scores of +3 among 12 isolates. Among these three isolates, the biofilm accumulation of C. pauculus was the highest and that of S. echinoides was the third-most abundant. The lowest biofilm accumulations were identified in Microbacterium testaceum and M. aquaticum. Most isolates with high adhesion ability also exhibited high biofilm formation ability. Analysis of adhesion and biofilm formation of the isolates from DUWLs can provide useful information to understand the mechanism of DUWL biofilm formation and development.

• Journal of the Korea Convergence Society
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• v.11 no.4
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• pp.221-231
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• 2020

In Korea's national competency standards, competency is defined as a concept that includes the common skills required to be a member of an organization, the knowledge, skills, attitudes, and values necessary to perform the task, in addition to the skills necessary to perform the task in the field. This study examines the recently published NCS-related paper, and summarizes the key findings in the areas of the design and operation of NCS-based curriculum, key factors that should be included in the design of each individual NCS-based curriculum, positive effects and negative effects of NCS-based education and training processes. Based on these findings and educational implications, the feasibility of expanding the NCS-based curriculum in junior colleges is discussed. In addition, the roles of Human Resources Development Service of Korea and NCS web site are discussed and some suggestions concerning their roles are provided.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2007.05a
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• pp.457-459
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• 2007

낙동강 하구의 맹금머리등, 백합등, 도요등의 세 개의 사주의 갈대분포와 관련된 토양 및 수질환경요인을 조사하였다. 대상지역의 갈대우점지역과 비우점지역에 대하여 토양 유기물 함량, 양이온 교환능력과 같은 토양 특성을 조사한 결과 이들 특성이 사주형성시기와 갈대의 분포유무와 관계있는 것으로 조사되었다. 유기물 함량은 갈대서식지역이 더 높게 나타났는데 이는 갈대의 성장으로 인한 토양의 유기물 축적 결과로 하구의 갈대가 사주의 토양환경에 영향을 미치고 있는 것으로 사료된다. 토양내 질소와 인 농도 역시 갈대우점지역에서 비우점지역에 비해 높게 나타났는데, 이는 토양 내 영양염류가 많은 곳을 갈대가 선호함과 동시에 갈대에 함유된 질소와 인성분이 토양에 집적된 두 가지 경우를 모두 고려할 수 있다. 수질조사 결과 현재 해수의 수질이 직접적으로 갈대의 분포에 영향을 주는 것은 아닌 것으로 나타났다. 하지만 토양양이온능력과 유기물 함량과 같은 토양특성 조사와 함께 고려하면 퇴적으로 인한 사주형성 및 토양유실과 갈대분포와 관련이 이는 사주에 형성된 식생이 사주의 영양물질 순환에 어떻게 영향을 미치는 가를 잘 설명해 주는 예라 할 수 있다.

• Proceedings of the Turfgrass Society of Korea Conference
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• 2011.02a
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• pp.11-21
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• 2011

경기도 여주군의 R골프장에서 페어웨이 건설 시 토양조사 및 적절한 토양개량이 실시되지 않아 배수불량지역의 발생한 것으로 한 것으로 분석되었다. 원인 분석결과 토양 경화로 인한 토양 물리성이 악화되어 있어, 투수에 의한 토양 하부층으로의 배수능력이 저조하여 배수 불량의 직접 원인이 되었다. 또 재배 지역의 토양과 이식 지역의 토성이 달라 이식 후 토양에 이질층이 형성되어 수분의 하층 이동이 원활하지 못해 배수 불량의 원인되고 잔디의 생육이 나빠지게 되었다. 배수불량의 결과로 인해 토양 내 산소가 부족하게 되어 토양이 환원 상태가 되면서 혐기성 미생물의 생육이 증가하고, 메탄가스가 축적되고 악취를 유발시키며 토양의 공기순환이 자유롭지 못해 식재된 잔디의 뿌리 생장에 악영향을 주어 결과적으로 잔디 생육이 불량하게 되는 연쇄적인 문제가 발생하였다. 골프장 운영 중 잔디 지반의 문제로 잔디 생육 불량을 초래 할 수 있는 여러 가지 요인들을 제거하기 위해 골프코스 건설시 모재 토양의 사전 조사 및 잔디 지반으로서의 적합성에 대하여 반드시 실험 분석하여야 하며, 건설 후 지반의 배수불량을 개선하기 위해서 배수구 설치, Sand capping, 잔디 보식, 토양개량재의 사용, 배토 등 경종적 관리 등의 방법을 이용하여 배수불량지역의 개선과 잔디생육 정상화를 시행하였다.