• Journal of Families and Better Life
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• v.21 no.5
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• pp.133-143
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• 2003

The main purpose of the study is to identify the perception, as well as the prejudices, of sexuality of the elderly and their sexual life. Older men and women aged 66-80 (N=17) who are married, healthy, and living in communities were interviewed regarding ADL, present and past sexual practices, prejudices on elderly sexuality, and obstacles to sexual life. The findings of this study are as follows: First, the old perceived that sexuality even in old age is an important part of life. However, they were also prejudiced about sexual intimacy in old age. Second, although an increase in age is correlated with a decrease in sexual activity, a number of older men and women continue to have active sexual life and they are satisfied with it as ever. This indicates a duality in the way the elderly perceive sexuality. Third, health status, partner's responsiveness, and environmental problems are prominent obstacles to sexual life. The study revealed that late-life sexuality must be conceived as a complex bio-psycho-social phenomenon. Consequently, it is important to hold sexual education programs for the young and the old.

• Journal of the Korean Society of Costume
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• v.28
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• pp.85-98
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• 1996

Yanbian is the area where many Korean-Chinese have settled and have undergone a unique culture. This study is intended to examine the clothing life of Korean-Chinese in Yanbian in the aspects of the cultural marginality and the effects of other cultures. Nowadays they have three kinds of dresses" Han-Bok In-Min-Bok and the western dress. han-Bok is the result of cultural marginal phenomenon so they pre-serve 1920s style which already disappeared in South Korea. In-Min-Bok is the production of Communism which is an 'invention' from the viewpoint of Cultural-Anthropology. However both Han-Bok and In-Min-Bok are gradually disappearing from the daily life. Today it is quite common for us to see a number of people wearing western dresses on the street. In their clothing life the acculturation to the Chinese wasn't traced which may be due to the strong 'National I dentity' of them.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.18 no.34
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• pp.83-89
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• 1995

We call as plant life cycle the process starting from plant plan, design to disuse by way of construction, operation, but the plant facility inside it comes to changes of cope with various inner factor like blazing phenomenon and outer factor according to economic state. On the presumption of these factors, the problem is brought about how plant should be managed, this study attempt to suggest the conservation management through economic evaluation in investment design and alternative, that is, methodology connecting that of economical efficiency evaluation based on LCC(Life Cycle Costing) thinking method and facility management with that of life prediction.

• Journal of the Korea Institute of Military Science and Technology
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• v.8 no.1 s.20
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• pp.14-24
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• 2005

A propellant mainly consisting of nitric ester including nitrocellulose, nitroglycerine and nitroguanidine is characteristic of being decomposed naturally. And this phenomenon is known as being affected mostly by its storing temperature. In this research, the effect of storing temperature on self life has been studied by measuring the contained quantity of residual stabilizer of propellant KM30A1, ignition powder and combustible cartridge case, which are parts of 155MM propelling charge K676 and K677; the method for the measurement is acceleration aging test, and decomposition reaction equation and Berthlot Equation were used for the calculation. The result of this research shows that propellant KM30A1, ignition powder, combustible cartridge case in order of decreasing self life, and the self life decreases to 1/3 as the temperature increases by $10^{\circ}C$.

• Journal of the Korea Institute of Military Science and Technology
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• v.9 no.2 s.25
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• pp.42-52
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• 2006

Tube erosion can be defined as a phenomenon for an increment of bore diameter, a declination of accuracy and utility of tube by firing. This study introduces the characteristics of tube life for the 155 mm K9 SHP Using a tube history book with bore measurement data and firing data of standard charge, this study analyzed the EFC vs Tube life and EFC with heat transfer effect formula as a consideration of continuous firing vs tube life. The results were compared with Firing Table(FT 155-K9-1) after the analysis. Also, this study suggests that CN98 tube can be rifled as 1000 EFC through the severe condition with continuous firing.

• Transactions of the Korean Society of Automotive Engineers
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• v.12 no.3
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• pp.109-121
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• 2004

This paper presents an optimal design method for structure-borne durability of a vehicle body structure. Structure-borne durability design requires a new design that can increase fatigue lives of critical areas in a structure and must prohibit transition phenomenon of critical areas that results from modification of the structure at the same time. Therefore, the optimization problem fur structure-borne durability design are consists of an objective function and design constraints of 2 types; type 1-constraint that increases fatigue lives of the critical areas to the required design limits and type 2-constraint that prohibits transition phenomenon of critical areas. The durability design problem is generally dynamic because a designer must consider the dynamic behavior such as fatigue analyses according to the structure modification during the optimal design process. This design scheme, however, requires such high computational cost that the design method cannot be applicable. For the purpose of efficiency of the durability design, we presents a method which carry out the equivalent static design problem instead of the dynamic one. In the proposed method, dynamic design constraints for fatigue life, are replaced to the equivalent static design constraints for stress/strain coefficients. The equivalent static design constraints are computed from static or eigen-value analyses. We carry out an optimal design for structure-borne durability of the newly developed bus and verify the effectiveness of the proposed method by examination of the result.

• Journal of the Korean Society of Costume
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• v.53 no.1
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• pp.129-141
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• 2003

Much has been said in the 21st century about advanced information society following industrial society, so information appeared obviously. Based on the development of digital network due to such highly developed information, foresee a new phenomenon in anthropology. The new phenomenon is urban nomad such jobnomad who may change the culture of settlement with a long history into the culture of nomad. This study was to analyze the culture and fashion style of job nomad who may be a trend of fashion in the future. The results of this study are as follows Firstly, the features of job nomad are new communication technology and information technology called new media. And key words for job nomad are non-possession and professionalism and their feature in labor is one(1) person project. Secondly, job nomad to be a trend of future fashion is seeking wearable electric machine - wearable computer fashion. Thirdly, Zen style fashion reflecting Zen idea has such features as naturalism. indeterminism, equalitarianism, and moderation. Those features coincide with the tendency of job nomad who may lead the culture of fashion in the 21st century and do with human being's life style in the 21st century. Expect that job nomad appears newly in social and cultural phenomenon through this study can be developed toward a new and sensible fashion.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.25 no.1
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• pp.48-52
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• 2012

The charged particle type display device is a kind of the reflectivity type display and shows an image by absorption and reflection of external light source. The charged particle is important factor for driving of the display and quantity of charge per mass of the charged particle determines the driving voltage, contrast ratio, response time, etc. But it is easy for the charged particles to be damaged in the putting process of the display and the damages cause lumping phenomenon of the charged particles. Because the lumping phenomenon makes high driving voltage, low quality of optical properties, short life time, etc, so the charged particles must be filled by stable putting methods. In this paper, we filled the charged particles into the panels by electric fields to improve the electrical and optical characteristics of the display. Also, we analyzed the driving characteristics of the charged particles according to the applied putting voltages.

• Journal of the Korean Society for Railway
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• v.15 no.3
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• pp.224-230
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• 2012

The wearing slider of the rail motor car's pantograph is considerable changed by the type and the material properties. Especially, precipitation and arc influences are main factors decided to life time of wearing slider and contact wire. This study is wearing phenomenon analysis of Cu-type wearing slider with high electric conductivity and resistance arc through experiment by running train. Author observed that wearing phenomenon of Cu-type wearing slider with normal and abnormal wearing characteristics and comparatively analysis precipitation, mileage and weight influences of exchanged Cutype and Fe-type wearing sliders. In this paper result showed that necessity for the application which is the Fe-type of wearing slider had superior wear resisting capacity etc., through tribology approach.

• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.17 no.2
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• pp.1-10
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• 2021

Lithium-ion batteries with high energy density, long cycle life and other advantages, have been widely used to energy storage systems(ESS). But as ESS fires frequently occur, the safety concern has become the main obstacle that hinders the large-scale applications of lithium-ion batteries. Especially, thermal runaway is the key scientific problem in battery safety research. Therefore, in this study, we performed a numerical analysis on the thermal runaway phenomenon of NCM111, NCM523 and NCM622 batteries using a two-dimensional analysis model. The results show that the two-dimensional simulation results are generally matched with three-dimensional simulation. Also, In the case of NCM111 with a low Ni content in the temperature range used in this study, thermal runaway phenomenon does occurred very slowly, but as the Ni content is increased, the thermal runaway phenomenon occurs rapidly and the thermal stability tends to be decreased. And, in NCM523 and NCM622 batteries, chain reactions occur almost simultaneously, but in the case of NCM111 battery, it is found that after the SEI(Solid Electrolyte Interface) layer decomposition reaction, the cathode-electrolyte reaction is appeared sequentially. After that, the anodic decomposition reaction is increased and leads to the thermal runaway reaction.