• Journal of the Korean Society of Propulsion Engineers
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• v.13 no.1
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• pp.27-33
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• 2009

Shock tube flow measurement has been often hampered a finite opening time of diaphragm, but there is no systematic work to investigate its effect on the shock tube flow. In the present study, both the experimental and computational works have been performed on the shock tube flows at low pressure ratios. The computational analysis has been performed using the two-dimensional, unsteady, compressible Navier-Stokes equations, based upon a TVD MUSCL finite difference scheme. It is known that the present computational results reproduce the experimental data with good accuracy and simulate successfully the process of diaphragm opening as a function of time. The concept of an imaginary center is introduced to quantify the non-centered expansion wave due to a finite opening time of diaphragm. The results obtained show that the diaphragm opening time is reduced as the initial pressure ratio of shock tube increases, leading to the effect of a finite opening time of diaphragm to be more remarkable at low pressure ratios.

• Archives of Plastic Surgery
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• v.43 no.5
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• pp.418-423
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• 2016

Background Skin grafting is a relatively simple and thus widely used procedure. However, the elastic and structural quality of grafted skin is poor. Recently, various dermal substitutes have been developed to overcome this disadvantage of split-thickness skin grafts. The present study aims to determine the feasibility of RapiGraft as a new dermal substitute. Methods This prospective study included 20 patients with partial- or full-thickness skin defects; the patients were enrolled between January 2013 and March 2014. After skin defect debridement, the wound was divided into two parts by an imaginary line. Split-thickness skin grafting alone was performed on one side (group A), and RapiGraft and split-thickness skin grafting were used on the other side (group B). All patients were evaluated using photographs and self-questionnaires. The Manchester scar scale (MSS), a chromameter, and a durometer were used for the scar evaluation. The average follow-up period was 6 months. Results The skin graft take rates were 93% in group A and 89% in group B, a non-significant difference (P=0.082). Statistically, group B had significantly lower MSS, vascularity, and pigmentation results than group A (P<0.05 for all). However, the groups did not differ significantly in pliability (P=0.155). Conclusions The present study indicates that a simultaneous application of RapiGraft and a split-thickness skin graft is safe and yields improved results. Therefore, we conclude that the use of RapiGraft along with skin grafting will be beneficial for patients requiring reconstructive surgery.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.14 no.1
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• pp.76-85
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• 2002

The floating breakwater generally has an excellent water exchanging capability, but with some lowering harbor tranquility due to the wave transmission underneath floating body. In the initial stage of design, it is thus required to investigate several alternatives of breakwater layout for their performance of harbor tranquility. The present study aims to formulate a sort of reflection-transmission boundary condition of floating breakwater so that the existing numerical method using time dependent mild slope equation can still be applied to the case of floating breakwaters. The two and three dimensional tests were each performed to demonstrate the performance of the boundary condition. It was found that the reflection and transmission characteristics around the breakwater were well reproduced by the boundary condition. Finally, the reflection-transmission boundary condition were applied to a floating breakwater installed in an imaginary harbor with an irregular shape and bottom topography. The results surely showed that the present numerical method can effectively used in practical works related to the real sea construction of floating breakwaters.

• The Journal of the Convergence on Culture Technology
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• v.9 no.4
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• pp.431-436
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• 2023

The film Aftersun(2022) is Scottish director Charlotte Wells' feature debut and is one of the films that received the most attention in the international art film scene that year. The overall structure of the film is a look back at a certain summer vacation that Sophie, now an adult, went to Turkey with Calum, a 30-year-old 'young dad', whom she lived apart after divorcing her mother when she was 11 years old. In fact, it can be said to be a reconstruction of memory, and Aftersun not only describes the contents remembered, but also reveals the process of reconstructing memories, making the film a process of post-action memory work. In this process, Aftersun proves Lev Manovich's words that cinema is an indexic art. Going back and forth between home video and cinematic diegesis, After Sun unleashes a new imaginary temporality through a two-hour conversation, traces of indexical signs engraved on home video and present times. The film urges involuntary memories in the chaotic time to the present, and makes meaning through traces and signs of intense gestures in the dialogue between media and media, past and present. The We think about the meaning through the time when the story is stopped and the implications of the gestures.

• Journal of the Economic Geographical Society of Korea
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• v.9 no.2
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• pp.211-224
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• 2006

With the increasing concern about natural resources that is being devastated and lost its reproductivity, Non-use value of resources for future use is considered more important than the present use value in the resource valuation. This study aims to measure Total Non-use value in Namsan Park, Kwanak and Paldal Mountain with CVM(Contingent Valuation Method). CVM is the method which can evaluate Non-use value of tourism resource to find the future value of the given resource. This study is carried on the assumption that respondents give answers not to real situation but to imaginary circumstances. After analysing benefit value by estimating conservation value and separate use value, we can conclude that conservation value of tourism resource is given much weight.

• Journal of the Korean Data and Information Science Society
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• v.26 no.4
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• pp.865-874
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• 2015

This research is to comprehensively evaluate offensive abilities of baseball players who are expected to produce as many runs as possible by their hitting and running. To this end, we establish a simulation program to obtain the so-called scoring index of an individual player. The scoring index of a player is defined as an expected number of runs scored by an imaginary team that is composed of nine copies of the player. As a simulation input, we use 2014 season data of Korean pro-baseball. As a result, we present the scoring indices of top 10 players, 9 Korean pro-baseball teams, and overall 2014 season. The scoring index can serve as a comprehensive evaluation of offensive ability of a player or a team, selection of players for a (national) team or for a starting line-up, estimation of player's worth, and so on.

• Journal of Sasang Constitutional Medicine
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• v.16 no.3
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• pp.1-7
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• 2004

1. Objectives This research is purposed to present developmental direction of traditional Korean medicine, through summarizing original medical mind of traditional Korean medicine. 2. Methods It was researched as bibliographic study with chief writings of traditional Korean medicine such as "DongEuiBoGam(東醫寶鑑)" and "Dongyi Suse Bowon(東醫壽世保元)" 3. Results and Conclusions (1) Huh Jun regarded Three Precious(三要: 精, 氣, 神) as important factors in Morpho-imaginary viewpoints. So he suggested finding out the pathological states according to the states of Three Precious. (2) As Huh Jun recognized that the essence(精) is the origin of the body, he suggested the medical mind of laying emphasis on the essence. And he suggested that circulating of the essence is important to health and longevity, which is different from previous trational medicne laying emphasis on the tonifying of five organs(五臟). (3) Dong-mu suggested diagnostic method that is to find out "Natural Principle of Organ(臟腑性理)" by observation of "Knowing-Acting(知行)" and "Morphological aspect and Temper(體形氣像)". And he suggested finding out pathological states according to states of "Good Qi of each constitution(體質正氣)". (4) Dong-mu recognized that the disease should be treated by recovering "Good Qi of each constitution" with both pharmacotherapy and non-pharmacotherapy. So he uggested the medical mind of laying emphasis on "Good Qi of each constitution", which is different from previous trational medicne laying emphasis on the tonifying of five organs. (5) To be brief, Huh Jun layed emphasis on the essence and Dong-mu layed emphasis on "Good Qi of each constitution". Emphasizing internal vitality which is applyed to treatment and prevention of disease is the original medical mind of traditional Korean medicine.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.6
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• pp.1181-1188
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• 2017

The unit and fundamental units of number fields are important to number field sieves testing primality of more than 400 digits integers and number field seive factoring the number in RSA cryptosystem, and multiplication of ideals and counting class number of the number field in imaginary quadratic cryptosystem. To minimize the time and space in H/W implementation of cryptosystems using fundamental units, in this paper, we introduce the Dirichlet's unit Theorem and propose our process of generating the fundamental units of the number field. And then we present the algorithm generating our fundamental units of the number field to minimize the time and space in H/W implementation and implementation results using the algorithm over the number field.

• Journal of the Korean Home Economics Association
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• v.40 no.10
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• pp.141-159
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• 2002

The purpose of this study is to find plan of practical using websites as welfare support system for present single-parent family practically. The subject websites were chosen by search in twice using Yahoo(http://www.yahoo.co.kr),Naver(http://www.naver.com).Empas(http://www.empas.com). The first search was accomplished by reference to these websites from the eighth of December to the twelfth of December in 2001. With the use of key words‘widowed mother & widower’,‘divorce’,‘single parent’,‘single-parent home’,‘single-parent family’. The second search was conducted on March 27, 2001. Finally 10 websites were selected. Chosen websites were analysed by structural element measure and structural technique measure of the contents. The following are summary of results and conclusion of this study. First, counsel program, self-help group, legal advice of the legal system and legal question area in the field of psychology·emotion·health problem of subject websites satisfied desire of single-parent family comparatively. Second, subject websites were classified into two types which are after the assessment of contents and structural technique of subject websites, a imaginary site was designed to solve the problem of single-parent family and to support single-parent family by means of prior research. Putting the result mentioned above together, As a step to solve the problem of single-parent family, to use practically website as a place single-parent family can be provided what the country and community cannot offer. It was accomplished by expanding self-help group extremely through the connection with ground to acquire strategy of dealing with single-parent family's desire and problem, volunteer supports and specialists.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.6
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• pp.3778-3786
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• 2015

This paper aimed to explore the possible popular song's linkage to tourism promotion material. Especially focusing on the lyrics of Korean popular song, which explicitly containing exoticism in title or lyrics in early and mid of 20 centuries, this research verified how authors represented the one of Dann's language of tourism thesis: strangeness perspective in tourism and language of differentiation. Result suggested that song writers, as of their imaginary by-product or personal experience, present exoticism in lyrics of song in various ways: exaggerating, creating, stereo-typing exotic place. Fulfilling the Dann's idea, songs elaborately delivered familiar words, conspicuously by personifying place, allocating young ladies and mentioning origin or hometown. The research was efforts to find the origin of entertainment contents savvy-tourism promotion and also traced potential tourist's collective imagination toward potential overseas tourism destination.