• Journal of Digital Convergence
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• v.11 no.12
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• pp.237-243
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• 2013

Companies engaged in the enterprise, while still at the start will have social responsibility. But recently, more and more companies will shorten the life expectancy of a corporate environment and is also rapidly changing. In this study, the longevity of global enterprises through the company's longevity factor analysis, that has continued to gain corporate answer. DuPont's global corporate giant Siemens and the longevity of the two factors in analyzing the factors that change the business portfolio, risk management, and continuous research and development, trust management, environmental management and other factors have been described. This ongoing internal and external environment analysis and core competencies by strengthening the implementation of responsible management as the core of the upcoming general management are appearing.

• The Korean Journal of Applied Statistics
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• v.28 no.4
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• pp.703-719
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• 2015

We propose an extension of the Lee and Jho (2015) mean reverting the two factor mortality model by incorporating a period-specific cohort effect. We found that the consideration of cohort effect improves the mortality fit of Korea male data above age 65. Parameters are estimated by the weighted least squares method and Metropolis algorithm. We also emphasize that the cohort effect is necessary to choose the base survival index to calculate longevity bond issue price. A key contribution of the article is the proposal and development of a method to calculate the longevity bond price to hedge the longevity risk exposed to Korea National Pension Services.

• Journal of Animal Science and Technology
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• v.58 no.12
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• pp.41.1-41.7
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• 2016

Background: Over two decades of observations in the field in South East Asia and Hawai'i suggest that majority of the commercial dairy herds are of black hair coat. Hence a simple study to determine the accuracy of the observation was conducted with two large dairy herds in Hawaii in the mid-1990s. Methods: A retrospective study on longevity of Holstein cattle in the tropics was conducted using DairyComp-305 lactation information coupled with phenotypic evaluation of hair coat color in two large dairy farms. Cows were classified into 3 groups: a) black (B, >90%); b) black/white (BW, 50:50) and c) white (W, >90%). Cows with other hair coat distribution were excluded from the study. In farm A, 211 out of 970 cows were identified having 4 or more lactations. In farm B, 690 out of 1,350 cows were identified with 2 or more lactations for the study. Results: The regression analyses and the Wilcoxon-Log-rank test for survival probability showed that Holstein cattle with 90% black hair coat had greater longevity compared to Holstein cattle with 90% white hair coat. Conclusions: This study suggests that longevity of Holstein cattle in tropical regions was influenced by hair coat color and characteristics.

• Asian-Australasian Journal of Animal Sciences
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• v.27 no.6
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• pp.784-790
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• 2014

In this study we aimed to evaluate the reduction in dimensionality of 20 linear type traits and more final score in 14,943 Holstein cows in Brazil using factor analysis, and indicate their relationship with longevity and 305 d first lactation milk production. Low partial correlations (-0.19 to 0.38), the medium to high Kaiser sampling mean (0.79) and the significance of the Bartlett sphericity test (p<0.001), indicated correlations between type traits and the suitability of these data for a factor analysis, after the elimination of seven traits. Two factors had autovalues greater than one. The first included width and height of posterior udder, udder texture, udder cleft, loin strength, bone quality and final score. The second included stature, top line, chest width, body depth, fore udder attachment, angularity and final score. The linear regression of the factors on several measures of longevity and 305 d milk production showed that selection considering only the first factor should lead to improvements in longevity and 305 milk production.

• Journal of Sasang Constitutional Medicine
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• v.10 no.1
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• pp.295-309
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• 1998

The purpose of this paper was to investigated to the relationship between longevity and Sasang Constitution. The investigation of this paper is composed of 4 parts. First part is investigated to the distribution of sex constitution and constitutional form. Second part is the distribution of the special of body quality(blood pressure, Pulse, Respiration, heredity, stool frequency) and the disease. Third part is the relation of the longevity reason(diet, alcohol intake, smoking). Fourth part is the relationship between the QSCC II and longevity reason. The results were as follows : 1. In case of a macrobian, Soyangin is much more in constitution. 2. A macrobian is generally short and thin. 3. About the macrobian's strength of heredity, there is no any meaningful conclusion, but more studying relationship between heredity and longevity is needed. 4. A macrobian has normal condition in blood pressure, pulse and feces condition. 5. In case of macrobian, the portion of a light eater, non-smoker, and abstainer is high, they like warm food. 6. A macrobian who is active and diligent has high accomplishment and good sociality. Considering above conclusion, a macrobian is related to Soyangin in characteristic of constitution. In the future, more studying is needed whether the macrobian has kept their lives with their unique preservation of health or not.

• Communications for Statistical Applications and Methods
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• v.26 no.6
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• pp.557-573
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• 2019

Mortality study is an essential component of actuarial risk management for life insurance policies, annuities, and pension plans. Life expectancy has drastically increased over the last several decades; consequently, longevity risk associated with annuity products and pension systems has emerged as a crucial issue. Among the various aspects of mortality study, a consideration of the cause-of-death mortality can provide a more comprehensive understanding of the nature of mortality/longevity risk. In this case study, the cause-of-mortality data in Korea and the US were analyzed along with a multinomial logistic regression model that was constructed to quantify the impact of mortality reduction in a specific cause on actuarial values. The results of analyses imply that mortality improvement due to a specific cause should be carefully monitored and reflected in mortality/longevity risk management. It was also confirmed that multinomial logistic regression model is a useful tool for analyzing cause-of-death mortality for actuarial applications.

• Restorative Dentistry and Endodontics
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• v.18 no.2
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• pp.501-506
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• 1993

The purpose of this study was to observe the longevity of amalgam and composite resin fillings in Korea. The number of placement of restorations was 760 amalgams and 415 composite resins. The amalgam restorations inserted because of primary caries were 61 % and replacement of amalgam restorations were 39%, and composite restorations inserted because of primary caries were 62 % and replacement of composite restorations were 38 %. The median longevity of failed amalgam restorations was 3 years and the madian longevity of failed composite restorations was 2 years. The main reason of replacement of amalgam and composite resin restorations was secondary caries.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.4
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• pp.893-897
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• 2003

We study the health tools for silver longevity on the theory of the material basis & vital and mental activities. The results are as follows. The navel herb-moxibustion tool strengthen material basis in the low elixir-field. The method is the fumigation of navel by the aroma of herb. The detailed micro-wave tool strengthen Ki(vital energy) in the middle elixir-field by the multi-method of the recognition-stimulation, micro-vibration, micro-current. The mystical pillow being composed of thirty two herbs strengthen mental activity in the upper elixir-field. The three methods are the synthetic, practical, familiar health tools for silver longevity.

• Molecules and Cells
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• v.45 no.11
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• pp.763-770
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• 2022

Caenorhabditis elegans has been used as a major model organism to identify genetic factors that regulate organismal aging and longevity. Insulin/insulin-like growth factor 1 (IGF-1) signaling (IIS) regulates aging in many species, ranging from nematodes to humans. C. elegans is a nonpathogenic genetic nematode model, which has been extensively utilized to identify molecular and cellular components that function in organismal aging and longevity. Here, we review the recent progress in the role of IIS in aging and longevity, which involves direct regulation of protein and RNA homeostasis, stress resistance, metabolism and the activities of the endocrine system. We also discuss recently identified genetic factors that interact with canonical IIS components to regulate aging and health span in C. elegans. We expect this review to provide valuable insights into understanding animal aging, which could eventually help develop anti-aging drugs for humans.

• Proceedings of The Korean Society of Health Promotion Conference
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• 2007.11a
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• pp.55-55
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• 2007

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