• Journal of Mechanical Science and Technology
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• 제19권spc1호
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• pp.265-271
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• 2005

Randomness exists in engineering. Tolerance, assemble-error, environment temperature and wear make the parameters of a mechanical system uncertain. So the behavior or response of the mechanical system is uncertain. In this paper, the uncertain parameters are treated as random variables. So if the probability distribution of a random parameter is known, the simulation of mechanical multibody dynamics can be made by Monte-Carlo method. Thus multibody dynamics simulation results can be obtained in statistics. A new concept called functional reliability is put forward in this paper, which can be defined as the probability of the dynamic parameters(such as position, orientation, velocity, acceleration etc.) of the key parts of a mechanical multibody system belong to their tolerance values. A flexible mechanical arm with random parameters is studied in this paper. The length, width, thickness and density of the flexible arm are treated as random variables and Gaussian distribution is used with given mean and variance. Computer code is developed based on the dynamic model and Monte-Carlo method to simulate the dynamic behavior of the flexible arm. At the same time the end effector's locating reliability is calculated with circular tolerance area. The theory and method presented in this paper are applicable on the dynamics modeling of general multibody systems.

• 한국정밀공학회지
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• 제21권6호
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• pp.102-108
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• 2004

This study addresses the contamination sensitivity test of a typical fuel pump for automotive vehicle. The objective of the study is to find the contamination sensitivity coefficient of fuel pump on specific contaminant particle sizes so that optimal fuel filter could be selected. To achieve the objective, the degradation of discharge flow rate of fuel pump was measured under the experiments of various contaminants size ranges of ISO test dust up to 80${\mu}{\textrm}{m}$. The fundamental theory of contamination sensitivity was introduced and the contamination sensitivity coefficients were estimated using the experimental data. Maximum contamination sensitivity coefficient of $5{\times}10^{-6}$ L/minㆍEa was found on the contaminant size range of 40${\mu}{\textrm}{m}$∼50${\mu}{\textrm}{m}$. The magnified picture of the surface of vane disc revealed that the abrasive wear was the principal cause of discharge flow rate degradation. Hence, this study revealed that high efficiency filter on the contaminant particle size range of 30${\mu}{\textrm}{m}$∼70${\mu}{\textrm}{m}$ especially should be used to maintain the service lift of the fuel filter.

• 한국소음진동공학회논문집
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• 제18권1호
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• pp.47-56
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• 2008

This paper presents a detecting technique for the improvement in quality by appling the various vibrational characteristics theory. The object of this study is to objectively point out faulty gear by developing the program which can be used to analyze and predict the vibrational characteristics caused by gear wear, deformation and nick of auto-transmission. The fault detection methods by vibrational signal analysis of gear have been progressed in the various fields of industry. These methods have the advantage of being easy to attach the accelerometer without discontinuance of the structure. But not all the methods are efficient for finding early faults. So in the thesis, we completed development of the inspection system of vibration by appling the most efficient detecting methods and verified the system's reliability through experiments.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.1011-1017
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• 2021

An effective measure to prevent the spread of COVID-19 is wearing masks in public places. This solution is highly recommended in many countries all over the world. The objective of this study is to identify the antecedents of citizens' intention to purchase masks during the COVID-19 pandemic. Based on the theory of planned behavior (TPB), the current study analyzes attitudes toward mask-purchasing, subjective norms, and perceived behavioral control, to assess their impact on intention to purchase masks. In total, six variables are examined: attitude toward mask-wearing, subjective norms, perceived behavioral control, perceived severity, perceived susceptibility, and the intention to wear masks. Data are collected from 243 respondents in Ho Chi Minh City, Vietnam. They were processed through by factor analysis and multiple regressions. The results report that all three factors positively affect citizens' intention to buy masks in the following ascending order: Attitude toward mask-purchasing, subjective norms, and perceived behavioral control. Our study is the first research that applies TPB to investigate citizens' intention to purchase masks to during the COVID-19 pandemic. Moreover, this study provides guidelines to the Vietnamese public managers to combat COVID-19 through the purchase of masks. Shopkeepers would be well advised to observe the intentions of consumers toward masks.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권4호
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• pp.1193-1215
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• 2021

The measurement of the key product quality index plays an important role in improving the production efficiency and ensuring the safety of the enterprise. Since the actual working conditions and parameters will inevitably change to some extent with time, such as drift of working point, wear of equipment and temperature change, etc., these will lead to the degradation of the quality variable prediction model. To deal with this problem, the selective integrated moving windows based principal component regression (SIMV-PCR) is proposed in this study. In the algorithm of traditional moving window, only the latest local process information is used, and the global process information will not be enough. In order to make full use of the process information contained in the past windows, a set of local models with differences are selected through hypothesis testing theory. The significance levels of both T - test and χ² - test are used to judge whether there is identity between two local models. Then the models are integrated by Bayesian quality estimation to improve the accuracy of quality variable prediction. The effectiveness of the proposed adaptive soft measurement method is verified by a numerical example and a practical industrial process.

• 한국의류산업학회지
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• 제24권5호
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• pp.519-529
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• 2022

This research analyzed the characteristics of Hanfu street snaps in the Chinese version of TikTok to determine the development and meaning of Hanfu. Based on grounded theory, this study selected 102 representative cases by sorting Hanfu street snaps on TikTok according to popularity. Subsequently, through open coding, the cases were organized and summarized into five main categories. The findings are as follows: 1) The national cultural pride has enabled a greater number of Hanfu fans and groups to upload short videos promoting the Hanfu movement on TikTok to expand the influence of the activities and popularize cultural knowledge. 2) The users attempted cross-cultural communication by participating in cultural festivals in Western countries wearing Hanfu. 3) The 'See now buy now' function of TikTok enables numerous Hanfu merchants to upload short videos about Hanfu products to promote their products and boost sales. 4) As 'gamification' affects everyday life, computer game enthusiasts among them wear Hanfu in the form of role-playing. 5)As a unique "meme" phenomenon on TikTok, wearing Hanfu to make interesting videos has also become a form of entertainment. Thus, although the characteristics of Hanfu street snaps on TikTok originated from the transmission of Hanfu culture, the culture has now been transformed through social media into symbolic consumption and play culture.

• 동서간호학연구지
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• 제2권1호
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• pp.83-95
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• 1997

Cooking food is very important in Chinese medicine when we regard the food to be the principal origin of the nutrition of human body and the condition required to maitain the activities of the life of human body. Chinese medicine has accumulated the diverse and rich experience of cooking food through long clinical experience as well as made an important contribution to the healthy and long life through the unique theory of cooking food. Chineses medicine has deep view on the relations between food cooking and healthy and long life as well as presented the principle of cooking food created unique ways of food cooking such as food treatment. As the above, from the ancient times, Chinese medicine established Chinese medical science of nutrition under the consciousness of the theory that food and medicine have the same origin and practiced the methods of promoting the health through rightly selecting the foods. Therefore it has been thought that human beings can enjoy healthy life by rich supply of the nutrition. Comfortable ways of sleeping requie the emotion and peace with temperation in pleasure and anger, and also we should be temporate in eating, acting, sleeping posture and be flee from the wind, and we should not put on a quilt when sleep, and we should sleep alone and be careful about sexual life. The concrete measures for sexual intercourse are that: 1) we should marry at the right age not to be married at early age. 2) we should obey nature and not live unmarried life. 3) we should be temperate in having sexual intercoure and in excessive sexual desire. Regarding the residence and clothes: the residence environment should be calm and beautiful and the room for the residence should be well designed to be clean and sanitary and we should wear suitable clothes. All living creatures are living according to the rhythm of the living body and the change of the great nature. The Reason why the living things show the periodical rhythm is not that it is the truth of the great nature, but that the living life itself shall be ceased to be existed in case of running counter to such rhythm. There are 2 specially important things: one is about food in biological view and the other is the residence in social side. By starting from the theory that food and medicine have the same origin and root, we should rightly select the foods to promote the health at the maximum, and it is very important for human to be well obeying the environment and temperate in the life of residence and mind (Choi, Sam Byun, Shon, Sook Young, 1997). As the above, the cook in Chinese medicine suggests us the suitable ways of achieving the goal of nursing. Therefore the continuous study of this field is necessary based on this my study though it is unsatisfactory at this time but it would be the basic materals in establishing the nursing science of Chinese medicine.

• 한국정보과학회논문지:시스템및이론
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• 제34권12호
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• pp.683-695
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• 2007

기존 NAND 플래시 메모리 기반 파일 시스템은 NAND 플래시 메모리 특성의 하나인 마모도로 인하여 삭제 횟수를 고려해야 하므로 특정 영역을 지속적으로 필요로 하는 정보는 파일 시스템에 저장될 수 없다. 이로 인하여 대부분의 NAND 플래시 메모리 파일 시스템은 마운트될 때 플래시 메모리 전체를 스캔하여 파일 시스템 구조를 파악한다. 따라서 마운트 시간은 NAND 플래시 메모리 크기에 따라 선형적으로 증가할 뿐만 아니라 NAND 플래시 메모리의 사용 형태에 따라 매우 달라 질 수 있다. 또한, NAND 플래시 메모리를 저장 장치로 많이 사용하는 모바일 기기는 특성상 안정적인 전원 공급을 보장받지 못하기 때문에 NAND 플래시 메모리 파일 시스템의 안정성 확보를 위한 대책이 요구 된다. 본 논문에서는 NAND 플래시 메모리 전용 파일 시스템의 마운트 시간을 향상시키고, 예기치 않은 정전과 같은 상황이 발생하여도 파일 시스템이 오동작하지 않고, 일관성 있게 복구가 가능하도록 설계하고 구현하였다. 구현된 파일 시스템은 기존의 NAND 플래시 메모리 기반 파일 시스템인 JFFS2에 비해 최대 19배, YAFFS와는 2배 정도 향상된 마운트 성능을 보였으며, 안정성 측면에서도 좋은 안정성을 가진 JFFS2와 같은 성능을 보였다.

• 복식문화연구
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• 제21권1호
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• pp.66-80
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• 2013

Nomadism means 'divide share' and 'drift where allocated'. The word to express a variety of modern people without being tied to a fixed time and place, constantly moving to new areas and explore the possibility. The progress of this study, first, to research on the conceptual study of Nomadism through Deleuze's theory of art and to organize Nomadism patterns and design paradigms in modern society. Second is to analyze and investigate cases of Nomadism based on the theoretical background in a way to reinterpret to the contemporary fashion, and to suggest the formative characteristics and inherent expressiveness of Nomadism expressed in modern fashion. Theoretical considerations made through the collection data were select from ready-to-wear women's collections 2005 S/S~2013 S/S presented in 'Style.com'. The results of the analysis of the formative characteristics of Nomadism in the $21^{st}$ century fashion are 'mixed expressions of time space and gender', 'pursuit of diversity through self-dismantling', 'clothing systemization of mobile and deformable' and 'temporary amusement, lightness, an expression of the ride rules'. The inherent expressiveness of Nomadism through these types of figurative representation are 'unbounded fashion', 'multi-center, multi-functional' and 'emotional directivity'. As such, philosophy and artistic trends started Nomadism is harmoniously expressed in terms of the design transcending the boundaries of existing stereotypes.

• 복식
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• 제59권1호
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• pp.60-76
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• 2009

The purpose of this study is to present the viewpoint on the 'clothes' as a part of art works which has the kunstwollen(artistic will) and the philosophy of a creator rather than just an outfit. For the literary research, this study investigates the history of Iconology and the E. Panofsky's theory. In order to make up for the limitation of Panofsky's iconology, applies the theories of H. Gombrich and N. Goodman. For the case research, Vivienne Westwood is selected because her fashion works have been mentioned as the artistic pieces by many fashion critics or the presses. Also Westwood has different social and cultural contexts which based on the periodic background, social influences and cultural actualities. The conclusions of this study are as follows. First, in order to read the symbolic meaning, the kunstwollen and the aesthetic consciousness of the fashion designer's works properly, the systematized interpretation method is necessary. Second, the creative works of Vivienne Westwood have been influenced by the various external elements. Especially her national background and identity are the main elements which have governed her creation. Third, Vivienne Westwood creates her works not just to wear but to incorporate the ideology and the philosophy of herself. She expresses the kunstwollen and the aesthetic consciousness through her works. Forth, Vivienne Westwood pursues the communication between the human being and the world. Fifth, fashion makes various attempts to combine with different artistic fields. The 21st century fashion has developed to new direction with diverse trials and combinations. Fashion is not just making clothes, but accepting and delivering the history and culture, expressing and communicating empathy, and combining the different fields harmoniously.