• Asian-Australasian Journal of Animal Sciences
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• 제28권11호
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• pp.1629-1640
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• 2015

This study was performed to compare carcass traits, sensory characteristics, physiochemical composition, and contents of nucleotides, collagen, and free amino acids among quality grades (QG) and to understand the association between QG and above parameters in loin and rump of Korean cattle steer. Loin and rump samples were obtained from 48 Korean cattle steers with each of four QG (QG 1++, 1+, 1, and 2; average 32 months of age). Carcass weight and marbling score (MS) were highest in QG 1++, whereas texture score measured by a meat grader was highest in QG 2. A correlation analysis revealed that MS (r = 0.98; p<0.01) and fat content (r = 0.73; p<0.01) had strong positive correlations with QG and that texture had a strong negative correlation (r = -0.78) with QG. Fat content in loin was highest but protein and moisture contents were lowest in QG 1++. Our results confirmed that a major determinant of QG is the MS; thus, intramuscular fat content. The International Commission on Illumination $L^*$, $a^*$, and $b^*$ values in loin were highest in QG 1++. Numeric values of shear force in loin were lowest in QG 1++, whereas those of tenderness, juiciness, and overall acceptability tended to be highest in QG 1++ without statistical significance. QG was strongly correlated with juiciness (r = 0.81; p<0.01) and overall acceptability (r = 0.87; p<0.001). All sensory characteristics were higher (p<0.05) in loin than those in rump. Adenosine-5'-monophosphate (AMP) and inosine-5'-monophosphate (IMP) contents in both loin and rump did not differ among QGs. No nucleotide (AMP, IMP, inosine, hypoxanthine) was correlated with any of the sensory traits. Total, soluble, and insoluble collagen contents in loin were higher in QG 1++ than those in QG 1. All three collagens had lower content in loin than that in rump. All three collagens were positively correlated with tenderness, juiciness, and overall acceptability. Glutamic acid content did not significantly differ among the four QGs in either loin or rump. In conclusion, it is confirmed that QG is associated with sensory traits but nucleotide contents in beef may not be a major factor determining meat palatability in the present study.

• 유통과학연구
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• 제11권6호
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• pp.59-65
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• 2013

Purpose - Studies of mechanism as a competitive strategy, a relatively new field in the study of strategic management research, has recently drawn the attention of the business management scholars. The literature has so far proposed the subjective-based view, environment-based view, and the resource-based view in its analyses of firm management. Hence, it is highly likely for the firm management to be reasonably thought of as a combination of and interaction among the three key elements of subject, environment, and resources this is the mechanism-based view (MBV). It is reasonable to consider firm management to be the combination of and interaction among the three key elements of subject, environment, and resources. The overall dynamic process that integrates these three elements and creates functional harmony is identified as the mechanism, the principle of firm management. Much of the extant literatures on MBV has mainly focused on case studies, a qualitative approach prone to subjectivity of the researcher, although the intuition from the study may lead to meaningful insights into a firm-specific mechanism. This study's focus is also on case analysis, but it still attempts a quantitative approach in order to reach a scientific and systematic understanding of the MBV. Research design, data, and methodology - I used both a qualitative and quantitative approach to a single model, given the complexity of the innovation processes. I conducted in-depth interviews with POSCO employees-20 from general management, two from human resources, eight from information technology, five from finance and accounting, and five from production and logistics management. Once the innovative events were selected, the interview results were double-checked by the interviewees themselves to ensure the accuracy of the answers recorded. Based on the interview, I then conducted statistical validation using the survey results as well. Results - This study analyzes the building process of innovation and the effect of the mechanism pattern on innovation by examining the case of POSCO, which has survived over the past 21 years. I apply a new analytical tool to study mechanism innovation types, perform a new classification, and describe the interrelationships among the mechanism factors. This process allows me to see how the "Subject"factor interacts with the other factors. I found that, in the innovation process of the adoption stage, Subject had a mediating effect but that the mediating effect of resource and performance was smaller than the effect of Subject on performance alone. During the implementation stage, the mediating effect of Subject increased. Conclusion - Therefore, I have confirmed that the subject utilizes resources reasonably and efficiently. I have also advanced mechanism studies: whereas the field's research methods have been largely confined to single case studies, I have used both qualitative and quantitative methods to examine the relationships among mechanisms.

• 응용통계연구
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• 제29권3호
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• pp.409-424
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• 2016

본 연구는 노후대비를 위한 재무수단 중에서 중요성이 커지고 있는 개인연금의 가입의향에 영향을 주는 심리요인과 금융요인 간의 인과관계를 종합적으로분석하고자 하였다. 이를 위해 전국 7대도시에 거주하는 928명의 일반인을 대상으로 실시한 설문자료를 토대로 구조방정식모형(SEM)을 이용하여 실증분석하였다. 구조방정식에 의한 실증분석결과, 개인연금 미가입자의 신규가입의향에 있어 장수에 대한 가능성과 대처효용성은 장수에 대한 정서인 두려움과 걱정을 완전매개로 하여 개인연금의 신규가입의향에 영향을 주는 것으로 나타났다. 그리고 보험사 신뢰와 위험감수성향은 직접적으로 개인연금의 신규가입의향에 영향을 주며, 특히 개인연금 가입의향에 대하여 보험사 신뢰가 가장 중요한 요인임을 보여주었다. 또한 개인연금 기가입자의 추가가입의향에 있어서는 보험사 신뢰만이 개인연금 추가가입의향에 직접적으로 영향을 주는 것으로 나타났다. 본 연구를 통하여 장수 관련 정서적 측면이 개인연금 미가입 고객을 대상으로 한 마케팅 활동에 도움이 될 것으로 기대된다. 아울러 보험사 신뢰가 미래의 개인연금 신규가입뿐만 아니라 추가가입의향에 가장 큰 영향을 미치므로 보험사의 신뢰도를 높이기 위한 노력이 긴요함을 시사한다.

• 한국가정과학회지
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• 제10권2호
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• pp.89-99
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• 2007

This study was conducted to investigate the dietary behavior and health-related lifestyles of high school students according to the living area in Chonbuk province, Self administered questionnaires were collected from 489 students. Statistical data analysis was completed using a SPSS v. 10.0 program. The results are summarized as follows: The average weight and height of male students in urban and rural area were 173.52cm, 65.26kg; 172.89cm, 64.02kg. The female students were 161.18cm, 52.48kg: 160.96cm, 52.82kg. The breakfast skipping ratio of students urban area were higher than the students in rural area, About 85% of students responded to have a lunch at school foodservice canteens. About 30% of students responded to have a dinner irregularly, which mainly caused by the reasons 'irregularity of life style' and 'weight control'. The ratio of snacks intake of the students were high, but female students eaten more fruits, cookies and coffee than male students. More than 50% of the students responded that one of the important influencing factor for health was 'a good eating habits'. About 44% of students in urban area and 40% of in rural area responded to take exercise one or three times a week. Students in urban area(37.3%) have more experiences of taking nutrient supplements than those in rural area(15.8%). TV/Radio (48.7%), clinic/apothec(19.0%), and family(16.0%) were essential sources of pertinent information about nutrition. The dietary behavior and health related lifestyle between the students in urban and rural area were very similar, but the female students showed more bad dietary behaviors in comparison with the male students. Therefore, they should have a gender oriented nutritional education program to correct their dietary behaviors and health-related lifestyle for health.

• 간호행정학회지
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• 제4권1호
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• pp.73-88
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• 1998

The management of nursing resource is very important. that is because nursing staff accounts for 30-40% of total staff in a hospital and nurses provide patoents with attentive service for hours daily. The continuous turnover of nursing staff. however, impedes the quality-oriented nursing care, which will consequently leads to the loss of human and material resource in competitive society. This study aimed to calculate nurse's activity and compare the activity amount based on career experience. Futhermore it aimed to find factors which would influence 'quality weighed direct nursing activity amount'. Questionnaires and check lists for this study were distributed to nurses in a suburban hospital outside of Seoul from October 20 to November 14. 1997. The nursing activities were calculated according to professionality. independency and working hour. And then it were accumulated by quality score. The collected data was analyzed by statistical methods as t-test, ANOVA, correlation, multiple regression. The results of this study were as follows ; Firstly, carrel' experience had no influence on the quality weighed nursing activity amount. But the quality level of service of skilled nurses was higher than that of new nurses. Secondly, career was a variable affecting the quality in nursing service. So career was positively related to the quality of nursing care. Patient's disease severity and number of patient were positively correlated with weighed nursing activity amount. But job satisfaction was negatively correlated v:ith the amount. Thirdly, the independent variables which had significant influence on the weighed nursing activity amount were disease severity and the number of patients, The severity score and number of patient were directly proportional to the weighed nursing activity amount. This results indicated· that weighed nursing activity amount was influenced by the number of patient and patient's disease severity. The quality score of nursing services for experienced members is higher than that of new staff. But both new and skilled staff showed no difference in the quality weighed nursing activity amount. Internal and. external environment influences nursing activities. The quality of nursing services is very important factor in nursing activity. Therefore nursing managers should make an effort to improve nursing care quality through continuous research. Also they should try to maintain experience nurses and assign nursing staff appropriately with patient's severity and other relevant factors being considered. The quality-improved nursing care in the hospital will strengthen hospital's competitiveness.

• Asian Pacific Journal of Cancer Prevention
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• 제14권1호
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• pp.111-116
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• 2013

Background: Cigarette smoking is the major risk factor for development of lung cancer. Identification of effects of tobacco on airway gene expression may provide insight into the causes. This research aimed to compare gene expression of large airway epithelium cells in normal smokers (n=13) and non-smokers (n=9) in order to find genes which discriminate the two groups and assess cigarette smoking effects on large airway epithelium cells.Materials and Methods: Genes discriminating smokers from non-smokers were identified by applying a neural network clustering method, growing self-organizing maps (GSOM), to microarray data according to class discrimination scores. An index was computed based on differentiation between each mean of gene expression in the two groups. This clustering approach provided the possibility of comparing thousands of genes simultaneously. Results: The applied approach compared the mean of 7,129 genes in smokers and non-smokers simultaneously and classified the genes of large airway epithelium cells which had differently expressed in smokers comparing with non-smokers. Seven genes were identified which had the highest different expression in smokers compared with the non-smokers group: NQO1, H19, ALDH3A1, AKR1C1, ABHD2, GPX2 and ADH7. Most (NQO1, ALDH3A1, AKR1C1, H19 and GPX2) are known to be clinically notable in lung cancer studies. Furthermore, statistical discriminate analysis showed that these genes could classify samples in smokers and non-smokers correctly with 100% accuracy. With the performed GSOM map, other nodes with high average discriminate scores included genes with alterations strongly related to the lung cancer such as AKR1C3, CYP1B1, UCHL1 and AKR1B10. Conclusions: This clustering by comparing expression of thousands of genes at the same time revealed alteration in normal smokers. Most of the identified genes were strongly relevant to lung cancer in the existing literature. The genes may be utilized to identify smokers with increased risk for lung cancer. A large sample study is now recommended to determine relations between the genes ABHD2 and ADH7 and smoking.

• 한국항만경제학회지
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• 제34권1호
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• pp.51-64
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• 2018

본 고는 Malmquist 생산성 지수를 이용하여 글로벌 금융위기 이전인 2001-2008년, 그 이후인 2008-2015년 두 기간 동안 조선 산업의 생산성변화를 기술효율성변화, 순효율성변화, 규모효율성변화, 기술변화로 구분하여 측정함과 동시에 두 기간 동안 생산성 변화를 비교하였다. 전반기(2001-2008년)에는 2.8%의 생산성 향상되었으며, 이는 기술효율성 보다는 기술진보에 기인된 것으로 나타났다. 후반기(2008-2015)에는 -3.4%의 생산성 하락으로 나타났다. 이는 글로벌 금융위기이후 세계경제의 침체로 인한 선박수주 물량의 감소, 중국 조선 산업의 부상 등으로 인해 기술효율성 저하, 기술퇴보 등에 기인된 것으로 나타났다. 두 기간 중 전반기 가 후반기보다 생산성이 높게 나타났다. 특히 두 기간 간에 이러한 차이는 기술변화에 의해 기인된 것으로, 즉, 기술 퇴보는 생산성 감소로 나타났으며, 통계적 검증을 통해서도 이를 입증할 수 있었다. 본 연구 결과에 의한 정책적 시사점으로는 정부 그리고 각 DMU들은 향후 생산성 증대를 위해, 글로벌 조선 산업의 환경변화에 대응하는 신기술개발 그리고 비효율적 요인을 제거하는 전략이 필요하다는 점을 제시하고 있다.

• 경영과정보연구
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• 제35권3호
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• pp.195-212
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• 2016

이 연구는 1분 단위의 거래량가중평균가격(VWAP)을 이용하여 한국 유가증권시장에 상장된 기업을 대상으로 특허권 취득 공시의 초과수익률 및 누적초과수익률 및 이벤트 차익거래 전략을 이용하였을 경우의 실현수익률을 분석하였다. 이상의 연구목표에 대한 결과는 다음과 같다. 첫째, 연구결과 특허권 취득공시 후 1분 뒤 평균 0.92%의 누적초과수익률이 유의하게 발생하여 한국유가증권시장이 실시간으로 효율적인 준강형 시장임을 확인하였다. 또한 기업규모(size)에 따라 3개 패널로 분류하여 연구한 결과, 소형주의 초과수익률이 중형주보다 적어 한국유가증권시장에서 규모효과가 더 이상 존재하지 않는다는 최근의 자산가격결정모형과 관련한 연구결과를 부분적으로 지지하였다. 둘째, 공시 시점에 매입하는 이벤트 차익거래 전략의 실현수익은 마켓 메이킹 전략이 가장 우수한 실현수익률을 보였으며 시장가로 매수 매도하는 전략은 음(-)의 수익률을 실현하였다. 이와 같은 결과는 즉각적으로 시장가 매수주문을 하는 전략보다 시장가주문과 지정가주문의 유입률, 주문의 취소율과 같은 주문흐름(order flow)과 체결확률을 고려한 마켓 메이킹 전략을 병행할 때 실현수익률이 향상될 수 있음을 시사한다.

• Journal of Radiation Protection and Research
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• 제44권4호
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• pp.128-148
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• 2019

Massive environmental monitoring has been conducted continuously since the Fukushima Daiichi Nuclear Power accident in March of 2011 by different monitoring methods that have different features together with migration studies of radiocesium in diverse environments. These results have clarified the characteristics of radiological environments and their temporal change around the Fukushima site. At three months after the accident, multiple radionuclides including radiostrontium and plutonium were detected in many locations; and it was confirmed that radiocesium was most important from the viewpoint of long-term exposure. Radiation levels around the Fukushima site have decreased greatly over time. The decreasing trend was found to change variously according to local conditions. The air dose rates in environments related to human living have decreased faster than expected from radioactive decay by a factor of 2-3 on average; those in pure forest have decreased more closely to physical decay. The main causes of air dose rate reduction were judged to be radioactive decay, movement of radiocesium in vertical and horizontal directions, and decontamination. Land-use categories and human activities have significantly affected the reduction tendency. Difference in the air dose rate reduction trends can be explained qualitatively according to the knowledge obtained in radiocesium migration studies; whereas, the quantitative explanation for individual sites is an important future challenge. The ecological half-lives of air dose rates have been evaluated by several researchers, and a short-term half-life within 1 year was commonly observed in the studies. An empirical model for predicting air dose rate distribution was developed based on statistical analysis of an extensive car-borne survey dataset, which enabled the prediction with confidence intervals. Different types of contamination maps were integrated to better quantify the spatial data. The obtained data were used for extended studies such as for identifying the main reactor that caused the contamination of arbitrary regions and developing standard procedures for environmental measurement and sampling. Annual external exposure doses for residents who intended to return to their homes were estimated as within a few millisieverts. Different forms of environmental data and knowledge have been provided for wide spectrum of people. Diverse aspects of lessons learned from the Fukushima accident, including practical ones, must be passed on to future generations.

• Journal of Gastric Cancer
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• 제9권3호
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• pp.88-95
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• 2009

목적: 세포자멸사의 중요인자인 p53과 bcl-2의 개별발현 및 동시 발현이 갖는 위선암의 예후 인자로서의 역할과 생존율에 미치는 영향을 알아보고자 하였다. 대상 및 방법: 1999년 12월에서 2007년 7월까지 위선암으로 분당제생병원 외과에서 근치적 위절제술을 시행 받은 238명의 환자들을 대상으로 자료의 후향적 분석을 시행하였다. p53과 bcl-2의 발현은 DAKO사의 Envision kit로 면역조직화학 염색을 하여 발현군을 양성으로 정의하였다. 결과: 전체 환자 중 p53은 149예(62.5%)에서 발현되었으며, 다른 임상병리학적 예후 인자와의 상관관계를 조사한 결과 세포분화도(P=0.028), TNM 병기(P<0.001)에서 유의성을 나타냈다. bcl-2은 29예(12.2%)가 발현되었으며, TNM 병기(P=0.005)에서 유의성을 나타냈다. 단변량 생존율 분석을 통해 p53과 bcl-2는 생존율 감소에 영향이 있으며, 다변량 생존율 분석을 통해 p53은 독립적 예후 인자로서의 확인되었다. 또한 두 단백의 동시 발현군도 TNM 병기(P=0.002)와 의미 있는 상관관계를 보였으며, 개별 발현 때보다 동시 발현 시 유의한 생존율 감소를 보였다(P<0.001). 결론: p53과 bcl-2의 개별 발현은 나쁜 예후를 나타내며, 이들의 동시 발현은 더욱 나쁜 예후를 나타냈다. 그러나 bcl-2는 다변량 분석에서 독립 예후인자로서 의미는 부족하여 더 많은 분석을 통해 명확히 할 필요가 있겠다.