• Korean Journal of Mathematics
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• 제16권4호
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• pp.537-543
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• 2008

Guan and Li [2] obtained SLLN for weighted sums of level-wise independent fuzzy random variables. In this paper, a generalization of Guan and Li [2] is obtained by using the Skorokhod metric on F(R).

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제12권1호
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• pp.66-76
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• 2012

In this paper, we introduce the concept of ordinary smooth topology on a set X by considering the gradation of openness of ordinary subsets of X. And we obtain the result [Corollary 2.13] : An ordinary smooth topology is fully determined its decomposition in classical topologies. Also we introduce the notion of ordinary smooth [resp. strong and weak] continuity and study some its properties. Also we introduce the concepts of a base and a subbase in an ordinary smooth topological space and study their properties. Finally, we investigate some properties of an ordinary smooth subspace.

• 통상정보연구
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• 제9권4호
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• pp.395-413
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• 2007

The main purpose of this study is to analyze the relationships between the R&D characteristics and R&D performance for Korean enterprises. We divided R&D performance into technological and business launching performance and analyzed four R&D characteristics' effect on the performance. The empirical analysis results can be summarized as follows: First, R&D characteristics of enterprises show a strong relationship with R&D performance in the case of R&D process control. Second, firm capability and information routine positively affect to technological performance at 0.1 significant level but not showing significance in the case of business launching performance. Third, managerial support negatively affects to technological performance but dose not show statistical significance. Its effect on business launching performance, however, shows positive and significant effect. This result is expected to be highly suggestive for establishing the effective R&D strategies of enterprises and also the relevant overseas marketing plan to support R&D planning.

• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 2006년도 제28회 동계학술발표회 논문집
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• pp.5-20
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• 2006

An efficient and productive R&D operation is a major source of competitive advantage in today's economy, and a lot of efforts are made to raise R&D productivity. A prerequisite for making R&D more efficient and productive is to be able to measure it. Hence, a number of studies have attempted to measure R&D productivity. R&D productivity, in the previous studies, was measured with patents at the firm or industry level. However, most previous studies considered only a quantitative aspect, not a quantitative aspect of patents. In this study, various dimensions of patent quality as well as patent quantity were considered for the measurement of R&D performance. The differences in R&D performance across sectors were examined, and it was found that electrical/electronic industry shows higher R&D performance than mechanic and chemical industries. Discriminant analysis based on inputs and outputs for R&D shows' that there exist a strong discriminatory power across industries. The results of this research can provide the directions 'for the firm's R&D policy.

• 한국물환경학회지
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• 제35권2호
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• pp.152-164
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• 2019

In this study, a Benthic Macroinvertebrates Family Index (BMFI) was developed using 100 indicator groups (99 families including Chironomidae with 2 phena). Families were assigned a score between 1 and 10 depending on their sensitivity to organic pollution. The BMFI was composed of the sensitivity and relative abundance of the indicator taxa. Sensitivity values of each group were generally similar to Biological Monitoring Working Party (BMWP) scores or Walley, Hawkes, Paisley, Trigg (WHPT) scores of UK, Japanese BMWP scores, and the FBI tolerance values of North America. However, sensitivity values of some taxa were significantly different from those of foreign countries, which seemed to have resulted from discrepancy in species composition, difference of taxonomic classification system, or methodological difference for estimation of sensitivity. As an annual average level, BMFI showed significant correlation with concentration of 5-day biochemical oxygen demand (BOD5) (correlation coefficient r = -0.80, n = 569 sites), total suspended solids (r = -0.68), and total phosphorus (r = -0.79). In addition, BMFI revealed strong correlation with Shannon-Weaver's species diversity (r = 0.85), Margalef's species richness (r = 0.85) and McNaughton's dominance (r = -0.84). Correlation between BMFI and water quality parameters or community indices such as species diversity did not show significant difference compared to that of species-level indices such as BMI (Benthic Macroinvertebrates Index). This means that BMFI is a more useful indicator in terms of easy identification of organisms. BMFI was used to assess the environmental status of 3,017 sites of Stream Ecosystem Survey conducted by the Korean Ministry of Environment between 2016 and 2018. As a result, about half of all sites appeared to be in good condition, and a quarter in poor condition.

• 경영과정보연구
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• 제38권1호
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• pp.1-21
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• 2019

본 연구는 최고경영자와 이사회의 네트워크밀도와 R&D투자 간의 관계와 이들 관계에 영향을 미칠 수 있는 기업분할의 유형과 제도의 영향을 분석하는데 주된 목적을 두고 실행되었다. 연구목적의 달성을 위해 외환위기가 발생하고 기업분할 관련법(상법 530조)이 제정된 직후인 1999년부터 가장 최근의 자료수집이 가능한 2016년까지 총 18년의 연구기간 동안 기업분할을 실행한 국내기업들을 대상으로 다중회귀분석을 실행하였다, 분석결과는 국내기업 최고경영자와 이사회의 네트워크밀도와 R&D투자 간에 유의한 정(+)의 관계가 있음을 보여주고 있다. 또한 기업분할 유형과 관련하여 최고경영자와 이사회의 네트워크밀도와 R&D투자 간의 정의 관계는 비관련분할에서 보다 관련분할을 실행한 기업에서 강화되었음을 보여주고 있으며, 기업분할 제도와 관련해서는 물적분할보다 인적분할을 실행한 기업들에서 이들 관계가 강화되었음을 보여주고 있다. 신속한 의사결정이 요구되는 사안임에도 불구하고 장기적인 관점에서 높은 수준의 불확실성과 위험을 수반하게 되는 R&D투자결정에 있어 최고경영자와 이사회 간의 네트워크밀도가 긍정적인 영향을 미칠 수 있음을 보여주는 본 연구의 분석결과는 최고경영진들 간의 신뢰의 중요성을 강조해 온 네트워크이론의 주장과 일치한다. 또한 혁신역량 강화를 위한 R&D투자결정에 있어 개인수준의 요인들뿐만 아니라 조직수준의 요인이 함께 고려되어야 함을 시사하고 있다. 본 연구는 향후 기업분할의 활용을 통한 보다 전략적인 국내기업 지배구조의 개선방안에 대한 연구를 강화하는 동기를 제공해 줄 수 있을 것으로 기대된다.

• 한국물환경학회지
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• 제34권5호
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• pp.514-536
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• 2018

GPI (Group Pollution Index) using 29 indicator groups of Korean benthic macroinvertebrates was proposed in 1992, a higher category taxa-level index developed for rapid field assessment of organic water pollution. This study was performed to revise the assessment scheme of GPI based on taxonomic performance and ecological information accumulated since 1992. The original GPI was renamed SBMI (Simple Benthic Macroinvertebrates Index), and SBMI was based on saprobic valency of 26 indicator groups composed of higher category taxa (mainly family ~ phylum) excluding some genus or species-level taxa. SBMI revealed highly significant correlation with concentration of 5-day biochemical oxygen demand ($BOD_5$) (correlation coefficient r = 0.78, n = 569 sites), total suspended solids (r = 0.69), and total phosphorus (r = 0.77). Also, SBMI revealed strong correlation with Shannon-Weaver's species diversity (r = -0.85), Margalef's species richness (r = -0.85), and McNaughton's dominance (r = 0.83). Determination coefficient of SBMI to concentration of water quality items and values of community indices such as species diversity was 3 ~ 8 % and approximately 11 ~ 14 % higher than that of GPI, respectively. Correlation between SBMI and water quality factors or community indices such as species diversity did not reveal much difference compared to that of species-level indices, such as BMI (Benthic Macroinvertebrates Index) and ESB (Ecological Score of Benthic Macroinvertebrates). SMBI is a simple-qualitative index with higher category taxa easily identified, and is applicable for rapid field assessment of water environment impairment.

• 한국재료학회지
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• 제12권6호
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• pp.431-435
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• 2002

The dark current and photocurrent(PC) spectrum of Mg-doped GaN thin film were investigated with various bias voltages and temperatures. At high temperature and small bias, the dark current is dominated by holes thermally activated from an acceptor level Al located at about 0.16 eV above the valence band maximum $(E_v)$, The PC peak originates from the electron transition from deep level A2 located at about 0.34 eV above the $E_v$ to the conduction band minimum $(E_ C)$. However, at a large bias voltage, holes thermally activated from A2 to Al experience the field-in-duces tunneling to form one-dimensional defect band at Al, which determines the dark current. The PC peak associated with the transition from Al to $E_ C$ is also observed at large bias voltages owing to the extended recombination lifetime of holes by the tunneling. In the near infrared region, a strong PC peak at 1.20 eV appears due to the hole transition from deep donor/acceptor level to the valence band.

• 대한간호학회지
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• 제30권2호
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• pp.331-341
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• 2000

Since cancer is not easily curable, patients who suffer from cancer may have physical, psychological and spiritual problems for the rest of their lives. Especially when cancer patients do not have much to live for and are placing a burden on their family they will experience more suffering emotionally as much as physically. This study was conducted to provide a basis of data for nursing intervention strategies to minimize a cancer patient`s suffering and to understand the relationship between suffering, burden and the meaning of life in cancer patients. The samples were composed of 160 cancer patients who were inpatients or outpatients of two university hospitals and two general hospitals in Seoul. Data collection were carried out from January, 25, 1999 to February, 26, 1999. The data were analyzed using a SAS program for descriptive statistics, pearson correlations, ANOVA, and Duncan tests. The results were as follows; 1. The scores on the two suffering scale ranged from 132 to 40 with a mean of 87.3(SD 17.5). The mean scores on the burden scale is 28.9(SD 6.9) and the score of the meaning of life ranged from 35 to 51 with a mean of 95.6(SD 18.4). 2. There were significant correlations between the amount of suffering and the magnitude of burden (r=.74, p=.00), the suffering and the meaning of life (r=-.59, p=.00) and the burden and meaning of life (r=-.61, p=.00). 3. In the degree of the suffering, the burden and the meaning of life were two very strong factors, the level of the suffering in cancer patients by age (F=2.64, p=.03) and education level (F=4.16, p=.00). The level of the burden in cancer patients differed by education level (F=4.70, p=.00) and type of cancer (F=2.97, p= .03). Also the level of the meaning of life in cancer patients was different by education level (F=3.55, p=.02). In conclusion, the burden and the meaning of life was identified as important variable that is contributed to reduce the suffering of cancer patients.

• 한국전문물리치료학회지
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• 제14권1호
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• pp.64-73
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• 2007

The purpose of this study was to find any correlations among Postural Assessment Scale for Stroke (PASS), Modified Barthel Index (MBI), Tone Assessment Scale (TAS), Motor Assessment Scale-Gait (MAS-G), Fugl Meyer-Balance (FM-B), and to predict MBI from subscales of the PASS. The subjects were 41 stroke patients of the Korea National Rehabilitation Center in Seoul. The main outcome measures were postural control (PASS), gait (MAS-G), Balance (FM-B), Tone (TAS), ADL (MBI). The data was analyzed using the Pearson product correlation. PASS scale was used between other clinical and instrumental indexes, multiple stepwise regression analyses were performed to identify prognostic factors for ADL incline, and Cronbach's alpha coefficient was used to identify internal consistency on PASS scale. The results of this study areas follows: 1. The highest level was sitting without support, the lowest level was standing on paretic leg on PASS scale. The highest level was chair/bed transfer, the lowest level was bathing on MBI. 2. All items of the PASS, except postural tone were significantly correlated with Gait, Balance, MBI (p<.01), 3. The Internal Consistency (Cronbach's alpha coefficient=.85) was very high, indicating that the PASS is homogeneous and is likely to produce consistent response. Furthermore, the sums of maintaining position items and of changing-position items were strongly correlated (r=.64, p<.05) and there were significant correlations between sums of PASS, sums of maintaining position items (r=.87, p<.01), and changing-position items (r=.93, p<.01). 4. The standing without support of the PASS items was the strongest variance ($R^2$=.85) of the predicting ADL function. These findings provide strong evidence of the predictive value of the postural control on gait, Balance, ADL function in stroke patients and to can provide a reference for the successful therapeutic program and more improved functional recovery.