• STI Policy Review
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• 제6권2호
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• pp.1-23
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• 2015

This study aims to contribute to the debate over the age-productivity relationships in scientific and technological research. For this purpose, we conducted an empirical experiment employing a time-series cross-section dataset derived from the KRI of the NRF containing data on individual researchers of fifty major universities in Korea covering the period of 2008-2013. This study has found that: (1) there exists an inverse U-shaped age-productivity relationship at the level of individual researchers; (2) the impact of the average age of a research group on the productivity of individual researchers varies across fields; (3) male and female researchers move along different age-productivity curves; and (4) the inverse U-shaped age-productivity relationship also holds at the level of organizations. The results suggest that the aging of researchers in Korea will soon reach the stage where serious losses in research productivity become a reality. Yet, it is not so clear whether the observed decline in the performance of older researchers is due to declining cognitive capability, which is an unavoidable result of aging, or to declining motivation, which results from an institutional system that discourages older researchers' research activities (such as reduced access to research opportunities or mandatory retirement). What is clear is that it is inevitable for the Korean science system to change the current seniority- and age-based organizational system into one of higher adaptability.

• 융합정보논문지
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• 제8권4호
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• pp.181-188
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• 2018

본 연구는 보육교사를 대상으로 다문화역량이 조직효과성에 어떠한 영향을 미치는지를 밝히고 어린이집의 조직효과성을 향상시키기 위한 기초자료를 제공하는데 그 목적이 있다. 이 목적을 달성하기 위하여 C대학교에 재학 중인 보육교사 258명을 편의 표집하여 설문조사 하였고, PASW를 활용하여 통계처리 하였다. 연구결과, 첫째, 다문화지식과 조직생산성, 조직적응성, 조직몰입, 직무만족간의 관계에서는 조직생산성, 조직적응성과 직무만족간의 관계에서 정적인 상관관계가 있었다. 둘째. 다문화인식과 조직생산성, 조직적응성, 조직몰입간의 관계에서는 모두 정적인 상관관계가 있었다. 셋째, 다문화지식과 다문화인식이 조직몰입, 조직적응성, 조직생산성에 긍정적인 영향을 미쳤다. 넷째, 다문화지식이 직무만족에 긍정적인 영향을 미쳤다. 따라서 융합시대에 어린이집의 조직효과성을 향상시키기 위해서는 다문화지식과 다문화인식에 관련된 교육 프로그램이 보육교사들에게 필요하다.

• 간호행정학회지
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• 제20권2호
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• pp.167-175
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• 2014

Purpose: The purpose of this study was to identify the levels of customer orientation in nurses whose work experience was between 1 and 5 years and to examine factors associated with customer orientation and nursing productivity. Methods: For this descriptive correlational study, nurses (N=164) were recruited from a University Hospital in B city, from November 1 to 23, 2012. Questionnaires included measures of customer orientation, nursing productivity, organizational commitment, job stress, and turnover intention. Data were analysed with the SPSS/WIN 18.0 program using descriptive statistics, t-test, ANOVA, Pearson correlation coefficient, and stepwise multiple regression. Results: The mean age of participants was 25 years, 96% were single, and 54.9% had a bachelor degree. Organizational commitment (${\beta}$=.387) and job stress (${\beta}$=.280) significantly explained the variance in customer orientation ($R^2$=15.8). Customer orientation (${\beta}$=.479), education level (${\beta}$=.196), and turnover intention (${\beta}$=-.184) significantly explained the variance in nursing productivity ($R^2$=35.3). Customer orientation was the most important factor in explaining the variance in the nursing productivity. Conclusion: This study highlighted the relationship between customer orientation and nursing productivity. Improving the customer orientation could result in increasing nursing productivity. Future managerial intervention to improve customer orientation is warranted.

• 헤리티지:역사와 과학
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• 제56권3호
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• pp.22-44
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• 2023

청동기시대 전기 생계경제는 문화유형, 환경적 요인 등에 의해 발현될 수 있는 생산방식의 다양성이 충분히 고려되지 않은 채, 농경 수행의 강도를 설명하는데 초점을 맞추어왔다. 이러한 상황은 신석기-청동기시대 이행을 얼마나 단절적으로 또는 연속적으로 이해할 것인가의 문제를 진지하게 고민하지 않는 데서 비롯된 것으로 보인다. 이러한 인식은 생계자원 생산방식의 점진적인 변화를 탐색할 수 있는 경로를 차단해 왔다. 본고에서는 청동기시대 생계자원의 생산방식이 연속·점진적으로 변화되었다는 것을 전제로 하면서, 청동기시대 전기 생산방식에 영향을 주었을 다양한 요소에 따른 생산자원 생산양상을 복원해보고자 하였다. 청동기시대 전기는 문화유형과 생태적소가 다양하게 확인되는바, 특정 시기의 생계자원 생산방식을 복원하는 작업은 단편적인 한두 가지 분석으로는 달성되기가 어렵다. 따라서 생계자원 생산과 관련된 몇 가지 측면을 분리하여 분석·해석하고 종국에는 모두를 종합하는 것이 적절한 방법적 경로가 될 듯하다. 구체적인 연구 방법으로 생계자원 생산과 밀접한 연관을 지니는 문화·환경적 요소-문화유형, 지리·지형적 요소, 토양생산성, 취락규모-에 따라 기능상 분류된 석제 생산도구 구성에 차이가 있는지를 확인하였다. 분석 결과 서울·경기 지역의 청동기시대 전기 생계자원 생산양상에 있어 문화유형과 지리·지형적 입지에 따른 유의미한 차이는 관찰되지 않는 반면, 취락규모와 토양생산성에 따른 생산도구 구성의 차이에서는 통계적으로도 제법 유의한 결과가 도출되었다. 취락규모와 종합생산토양 비율이 증가할수록 수렵·무구, 목가공구, 수확구가 증가하는 반면 어로구의 비율에 있어서는 그 반대의 양상이 관찰되었다. 취락규모나 작물재배의 생산성에 따른 수렵 혹은 농경에 대한 의존도 사이에 상관관계를 기대하게 하나, 취락규모와 토양생산성 비율 간의 회귀분석 결과에서는 상호 유의미한 관계로 해석되지 않았다. 즉, 이는 여러 요인에 따라 생산양상도 상이하며, 어느 단편적인 요소가 특정 취락의 생계자원의 생산방식을 채택하는데 결정적이지 않았다는 것을 보여주는 결과라고 할 수 있다. 따라서 청동기시대 전기 사회에서의 취락을 구성하는 다양한 문화·환경적 요소에 따라 생계자원 생산양상 검토가 필요하다.

• 기술혁신학회지
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• 제18권1호
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• pp.98-125
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• 2015

본 연구는 이공계 분야별로 연구산출에 미치는 영향요인을 규명하고자 한 것이다. 이를 위해 2010-2012년 기간 BK21플러스 사업에 참여한 물리 화학 생물 기계 전기전자 화학공학 6개 분야 교수 1,383명의 연평균 자료를 분석하였다. 연구생산성에 미치는 변수로 성별, 연령별, 직급별, 지역별, 박사학위취득 국가와 같은 개인변수와 석사과정 학생 수, 박사과정 학생 수, 정부연구비, 산업체연구비 및 해외연구비라는 자원변수를 설정하였다. 논문과 특허 및 이들의 종합지수라는 3개 변수를 연구산출로, 대규모 공식적인 데이터를 이용해, 6개 분야에서, 영향요인을 분석했다는 점에서 본 연구는 다른 연구와 차이가 있다. 분석결과는 다음과 같다. 연구생산성에 미치는 요인은 분야에 따라 크게 차이가 난다. 특히 어떠한 개인변수나 자원변수도 모든 분야에서 공통으로 영향을 미치는 경우는 없다. 또한 자연계의 연구산출에 유의한 설명변수 숫자는 공학계보다 적었다. 분야별로 논문과 특허 산출의 비중이 다르고, 이들 간의 상관관계도 큰 차이를 보였다. 물리 화학에서는 논문과 특허 간에 관계가 없고, 나머지 분야에서는 양의 관계가 있었다.

• 산업경영시스템학회지
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• 제35권4호
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• pp.202-210
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• 2012

This study was analyzed based on the core competencies that Small Giant enterprises to foster the goals of growth of SMEs mid-sized businesses rather than Global Small Giant enterprises of the business model for a causal relationship. As the result, the average age, sales and number of employees of Korean small giants were 20.6 years, 148.8 billion won and 312.1. This research investigated that Korean small giants were realizing the sustainable growth with the firm shares in the target markets, based on added values in groups and technical powers, although their average age is one third younger than global small giants. The further research needs to develop and select small giants more precisely and strictly. It is expected that small giants will be new growth engines to improve global competitiveness of Korea.

• Asian-Australasian Journal of Animal Sciences
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• 제25권2호
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• pp.151-162
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• 2012

Analysis for back fat thickness (BFAT) and daily body weight gains from birth to the end of a performance test were conducted to find an optimal method for estimation of weaning age effects and to ascertain impacts of weaning age on the growth performance of purebred Berkshire pigs from a closed population in Korea. Individual body weights were measured at birth (B), at weaning (W: mean, 22.9 d), at the beginning of the performance test (P: mean, 72.7 d), and at the end of the performance test (T: mean, 152.4 d). Further, the average daily gains in body weight (ADG) of 3,713 pigs were analyzed for the following periods: B to W (DGBW), W to P (DGWP), P to T (DGPT), B to P (DGBP), B to T (DGBT), and W to T (DGWT). Weaning ages ranged from 17 to 34 d, and were treated as fixed (WF), random with (WC) and random without (WU) consideration of an empirical relationship between weaning ages in the models. WF and WC produced the lowest AIC (Akaike Information Criterion) and least fractions of error variance components in multi-traits analysis, respectively. The fractions of variances due to diverse weaning age and the weaning age correlations among ADGs of different stages (when no overlapping allowed) by WC ranged from 0.09 to 0.35 and from -0.03 to 0.44, respectively. The maximum weaning age effects and optimal back fat thicknesses were attained at weaning ages of 27 to 32 d. With the exception of DGBW, the effects of weaning age on the ADGs increased (ranging from 1.50 g/d to 7.14 g/d) with increased weaning age. In addition, BFAT was reduced by 0.106 mm per increased day in weaning age. In conclusion, WC produced reasonable weaning age correlations, and improved the fitness of the model. Weaning age was one of crucial factors (comparable with heritability) influencing growth performance in Berkshire pigs. Further, these studies suggest that increasing weaning age up to 32 d can be an effective management strategy to improve growth performance. However, additional investigations of the costs and losses related to extension of the suckling period and on the extended range of weaning age are necessary to determine the productivity and safety of this practice in a commercial herd and production system.

• 한국토양비료학회지
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• 제42권3호
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• pp.160-166
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• 2009

We estimated site productivity for unstocked land based on the relationship between site index (i.e., average height of dominant trees at fixed age) and soil physico-chemical properties of Pinus densiflora stands. Site index relates to a direct method of determining a tree's response to a specific environment such as forest soil and climate conditions. We selected 78 sites in 22 P. densiflora stands of central temperate forest zone, and sampled soils for physicochemical analyzing. And 13 properties of soils were statistically treated by stepwise regression. In the degree of contribution of the variables to site index, the highly effective variables in A horizon were OM, clay content, sand content, available $P_2O_5$, and Exch. $Ca^{{+}{+}}$ inorder, and in B horizon T.N., O.M., Soil pH, cation exchange capacity(C.E.C.), and sand content in order. In both A and B horizon of the soil for P. densiflora stands, the variables commonly contributed to the site index were sand content and OM. These results may be useful to provide not only important criteria for establishment of Pinus densiflora stand sespecially in unstocked land but also aguidance for reforestation.

• 한국산림과학회지
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• 제99권5호
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• pp.726-735
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• 2010

Publications with the data on allometric equation, biomass and productivity of major oak forests in Korea were reviewed. Different allometric equations of major oak species showed site- or speciesspecific dependences. The biomass of major oak forests varied with age, dominant species, and location. Aboveground tree biomass over the different oak species was expressed as a power equation of the stand age. The proportion of tree component (stem, branch and leaf) to total aboveground biomass differed among oak species, however, biomass ranked stem > branch > leaf in general. The leaf biomass allocation over the different oak species was expressed as a power equation of total aboveground biomass while there were no significant patterns of biomass allocation from stem and branch to the aboveground biomass. Tree root biomass continuously increased with the aboveground biomass for the major oak forests. The relationship between the root to shoot ratio and the aboveground tree biomass was expressed by a logarithmic equation for major oak forests in Korea. Thirteen sets of data were used for estimating the net primary production (NPP) and net ecosystem production (NEP) of oak forests. The mean NPP and NEP across different oak forests was 10.2 and 1.9 Mg C $ha^{-1}year^{-1}$. The results in biomass allocation, NPP and NEP generally make Korean oak forests an important carbon sinks.

• Journal of Forest and Environmental Science
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• 제24권3호
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• pp.155-158
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• 2008

Site index is the essential tool for forest management to estimate the productivity of forest land Generally, site index equation is developed and used by relationship between stand age and dominant tree heights. However, there is a limit to use the site index equation in the application of variable ages, environmental influence, and estimation of site index for unstocked land. Therefore, it was attempted to develop a new site index equations based on various environmental factors including site and topographical variables. This study was conducted to develop regional site index equations based on the relationship between site index and soil factors for Pinus densiflora. Environmental factors that obtained from GIS application, were selected by stepwise-regression. Site index Equation was estimated by multiple regression from selected factors. Four environmental factors were selected in the final site index equations by stepwise regression. It was observed that coefficients of determination for site index equations were ranged from 0.34 which seem to be relatively low but good enough for estimation of forest stand productivity. The site index equations developed in this study were also verified to be useful by three evaluation statistics such as model's estimation bias, model's precision and mean square error type of measure.