• Magazine of the Korean Society of Agricultural Engineers
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• v.45 no.3
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• pp.116-126
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• 2003

In this study, we research about the relationships of human longevity and environments, inducted the significant factors of longevity from the statistical analysis, and represented spatial distribution of longevity using geographic information system. The factors confining human longevity can be categorized by geography/geology, climate/weather, economy, and social welfare. After analyzing statistical data, dependent variable which means the longevity index is defined by the ratio of population more than 85 years old among population more than 65 years old. The results of analysis show that longevity are related with waterworks ratio, temperature, local tax ratio, and latitude. In this study we discussed about the spatial characteristics which are represented by variance of the longevity index and described a spatial relationship between the longevity index and significant factors which are chosen by statistical analysis. In the further study, in order to sustain the longevity of a region, it is necessary for the effective rural planning to propagate a longevity of rural areas.

• 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 the Korean Data and Information Science Society
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• v.27 no.2
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• pp.437-449
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• 2016

This study empirically analyzes casual relationships among psychological and financial factors influencing the subscription of individual pension and identifies mediation effect by the structural equation model. The analysis based on survey data (N=928) from common people living in the seven major cities in Korea shows that potential longevity, coping efficacy to the financial risks from longevity, subjective knowledge on longevity (cognitive factor), trust in insurers (social factor), and financial literacy(financial factor) are key players exercising direct influence over the subscription of individual pension. It also has been shown that affect on longevity, potential longevity, trust in government, and coping efficacy influence the emotions on longevity, fear and worry, and emotions on longevity are not significant in explaining the subscription of individual pension. Trust in insurers and financial knowledge of prospects have also been reaffirmed to be crucial factors in the activation of individual pension subscription.

• 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.

• Korean Journal of Health Education and Promotion
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• v.6 no.1
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• pp.34-47
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• 1989

The changing trend of longevity from 1955 through 1985 and its interprovincal variation were studied with longevity rate as indicator. In order to detect the affecting factors of longevity rate, eleven urbanalizational, geographic-environmental, demographic and social-economic variables were employed to carry out multiple stepwise regression analysis. The data used for this study were from Population Census Reports 1955-1985 published by EPB and Year book of Public Health and Social Statistics 1986 published by Ministry of Health and Social Affairs and other reference. Subsequent to that longevity rate decreased during 1950's it has increased continuously by the yeat of 1980's. This trend was especially remarkable in the south area and the GIRI mountain area in Korea. The stepwise regression analysis shows that the longevity rates were significantly associated with the independent variables, and the dependent variables explained at the level of 93.7percent-99.9 percent. Longevity is a reflection of the demographic and socio-economic, environmental and health resourses factor etc., longevity problems cannot be dealt with in isolation. The possible research and services which could be provided by government will be discuss.

• Journal of Digital Convergence
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• v.13 no.1
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• pp.85-92
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• 2015

Recently more and more shortened of corporation's sustainable longevity at the enterprise, and enterprise environment is also changing drastically. In this study, we wanted to obtain a solution that enable to continue the company's corporate longevity through critical factor analysis of the Japan Shinise. In the analysis results of Japan corporation as Doraya, Deicoko, Shinise longevity, we can explain about critical factors like that credit, tradition, customization, products development, changes of management methods and finding a global new markets. Also, In this study, analyzed a significance of critical factors for focusing on each cases and theories using Analytic Hierarchy Process(AHP), and did prediction and analysis about critical longevity factors. However, it need to collect sufficient data and a lots of variables for input. because the sample may be it insufficient. Results of the study, will be expected to be a useful guide for analysis of longevity factors at the company in the future.

• BMB Reports
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• v.50 no.4
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• pp.160-161
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• 2017

Proper maintenance of biological components is crucial for longevity and healthy aging. Although the role of homeostatic maintenance systems for DNA and protein in longevity is established, it remains largely unknown for RNA. In our recent work, we show that nonsense-mediated mRNA decay (NMD) promotes longevity in the roundworm C. elegans by enhancing RNA quality control. We find that the activity of NMD decreases during aging, raising the possibility that RNA quality declines in old animals. We then show that key components of NMD complex are required for prolonged lifespan in C. elegans. In addition, animals with reduced insulin/insulin-like growth factor-1 (IGF-1) signaling (IIS), a representative longevity model, display increased NMD activity. Thus, up-regulation of NMD appears to play crucial roles in longevity conferred by reduced IIS via enhancing mRNA quality control. As both IIS and NMD pathways are evolutionarily conserved, mammals including humans may be equipped with similar RNA quality control systems to achieve longevity.

• 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.

• BMB Reports
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• v.52 no.1
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• pp.70-85
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• 2019

Reduction of insulin/insulin-like growth factor 1 (IGF1) signaling (IIS) extends the lifespan of various species. So far, several longevity mouse models have been developed containing mutations related to growth signaling deficiency by targeting growth hormone (GH), IGF1, IGF1 receptor, insulin receptor, and insulin receptor substrate. In addition, p70 ribosomal protein S6 kinase 1 (S6K1) knockout leads to lifespan extension. S6K1 encodes an important kinase in the regulation of cell growth. S6K1 is regulated by mechanistic target of rapamycin (mTOR) complex 1. The v-myc myelocytomatosis viral oncogene homolog (MYC)-deficient mice also exhibits a longevity phenotype. The gene expression profiles of these mice models have been measured to identify their longevity mechanisms. Here, we summarize our knowledge of long-lived mouse models related to growth and discuss phenotypic characteristics, including organ-specific gene expression patterns.

• Korean Journal of Health Education and Promotion
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• v.20 no.4
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• pp.41-50
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• 2003

Objectives： The purpose of this paper is to analyze longevity factors of 507 centenarians in the Republic of Korea. Methods： This paper is designed to survey physical, mental, socio-demographic and dietary factors of 507 centenarians. The data was collected by means of telephone interview from 1999 to 2001. The survey directly contacted centenarians who were able to communicate, or contacted the centenarians caregivers. The association between longevity factors of centenarians was verified by odds ratio of logistic regression. Results： Female centenarians appeared to be non-smokers more often than males (OR＝4.06, CI＝2.06, 7.98). The longevity of persons with a small waist circumference was attributed to health promotion through eating lightly as well as keeping active including walking(OR＝2.37, CI＝1.36, 4.14). A higher probability for longevity is found among optimists who live a happy life and 1aught every day (OR＝26.15, CI＝11.61, 58.89). Among centenarians, vegetarians were shown to be light eaters. More ratios of vegetarians among centenarians included those who reside in a rural district, eat bean paste soup everyday, and consume small quantities of meat (OR＝5.12, CI＝3.24, 8.08). Conclusion： Women, manual workers, under poor to middle economic status, rural residents, optimists, light eaters, vegetarians and non-smokers seemed to have a higher probability of becoming centenarians in The Republic of Korea.