Linear annealing method was developed to increase the bond strength of Si wafer pair mated at room temperature instead of conventional furnace annealing method. It has been known that the interval of the two mating wafer surfaces decreases and the density of gaseous phases generated at the interface increases with increase in an-nealing temperature. The new annealing method consisting of one heat source and light reflecting mirror used these two phenomena and was applied to Si$\mid$$\mid$Si and Si$\mid$$\mid$$SiO_2/Si$ bonding. The bonding interface observed directly by using IR camera and HRTEM showed clear bonding interface without any unbonded areas except the area generated by the dusts inserted into the mating interface at the room temperature. Crack opening method and direct tensile test was appplied to measure the bond strength. The two methods showed similar results. The bond strength increased continuoustly with the increase of annealing temperature.
Purpose: The purpose of this study was to obtain the fundamental data of dynamic visual acuity and dynamic stereoacuity. Methods: The subjects were 20 athletes (high school baseball player) and 40 nonathletes (20 male, 20 female). We assessed static visual acuity, dynamic visual acuity, static stereoacuity and dynamic stereoacuity using rotating mirror projection system and computer program. Results: Three groups had similar static visual acuity and static stereoacuity. On the other hand, the dynamic visual acuity and dynamic stereoacuity showed statistically significant differency. The mean dynamic visual acuity for athletes was 174.80${\pm}$28.70 deg/sec, 137.10${\pm}$16.54 deg/sec for male nonathletes and 111.59${\pm}$15.40 deg/sec for female nonathletes. The mean dynamic stereoacuity for athlets was 234.55${\pm}$19.64, 249.05${\pm}$8.86 for male nonathletes and 247.10${\pm}$14.89 for female nonathletes. The group of athletes had better dynamic visual acuity and dynamic stereoacuity. Conclusions: If the result of this study apply to sports, it will be very useful to improve sports performance.
Eugene O'Neill's one-act play Before Breakfast (1916) depicts a morning scene of a married couple who live in a slovenly flat at Greenwich Village. There is no apparent dramatic action occurring in the play. Instead, the play is full of Mrs. Rowland's incessant complaints about her husband Alfred's loafing around bars with artists friends, neglecting his role as breadwinner. An irony is that every morning she prepares breakfast for the good-for-nothing husband even in the moment of complaining. It is worth noting that Alfred is an 'unseen character' who is never directly observed by the audience but is only described by her wife. Deprived of all chances to speak and present himself on stage, he is kept in the room throughout the play. In contrast, Mrs. Rowland dominates the stage, monopolizing language and action. The audience has to listen to her, judge from her statements, and take her one-sided complaints. The accused husband, with zero chance of showing up and defending himself, has no choice but to be the sinner as the wife intends. Another irony is that the audience's feeling about the situation is quite different from what is expected. The wife's complaints are regarded to be unfair and groundless in the reason that the situation is monopolized by her. In case of the husband, in contrast, the loss of voice and presence stresses the injustice of his dead-lock situation. In other words, the 'absent' quality of Alfred works to evoke the audience's sympathy for himself and subsequently makes his presence recognized, not visually but emotionally, by the audience throughout the play. Discovered in this paradoxical moment where the spectators understand or 'see' the status of the unseen and the devoiced message is successfully conveyed to the listeners, is the theatricality of absence. Adding to the function as theatrical device, the 'unseen character' Alfred works as a device of self-reflection to mirror the author's own life. Alfred, the alter-ego of O'Neill, effectively exorcises the author's life-long feeling of guilty as the unfaithful husband and father in the unhappy first marriage, successfully evoking the audience's sympathy for himself.
Harold Pinter's One for the Road(1984) is a play about violence. Nicholas, who appears to be the manager of a place, interrogates Victor, Nicky, and Victor's wife Gila in a room for one day from morning to night. There is no direct physical violence in this play. But hints about the atrocities that took place outside the stage make the audience guess the violence and cruelty. Violence, which is not seen as such, is the central theme of the play. One for the road is worth reading as a resistance to breaking the mirror of global ideology, not as it deals with violent events confined to Turkey. The problem which Pinter had in mind, in particular, is that the United States plays a leading role in producing world-class ideologies, and that Britain is involved in collusion with the United States in cultivating such ideological fantasies, both abroad and at home. This thesis analyzes the contrasting reactions of each character in the play based on this social context. In particular, the conflicting reactions of the characters on the system are the most important conflict in the drama. Nicolas is a manager who moves on the system without seeing the truth. Victor and his family, on the other hand, do not move within the same ideology as Nicholas. This paper will take a look at what their strategies of resistance is and how they are revealed in the work. In fact, Nicholas appears split. Nicholas seemingly reacted decisively to the interpellation of the system. He expresses his belief and respect for the legitimacy of his actions. However, he has repeatedly sought the respect and love of Victor. Nicholas is now swaying. The theme that Nicholas presents consciously by grabbing at his own sway is 'Patriotism.' But this fantasy splits through Victor's silence and death demands. Therefore, the questions to be answered are: So why does Nicolas appear to be torn apart in a system that directs violence? But why is he forced to assimilate into the system? What other figures imply? To answer these questions, this thesis will take Slavoj Zizek's view of ideology. On the other hand, there are previous studies that read the system of violence in One for the road from the Althusser's perspective. Surely, this play explores the role of Ideological State Apparatus. However, from the point of view of Althusser, it is not possible to read Nicholas's division and the point of resistance seen by Victor's family. Pinter does not limit the scope of the ideological system as a closed one that regenerates ideologies, but secures the domain of main body resistance and struggle. On the other hand, there are already several domestic theses that read Pinter's work in Zizek's perspective. But these theses are mainly focused on analysis of Mountain Language. What this thesis would suggest is that there is a potential for an ethical figure of Zizek to be considered in One for the Road.
The Russian icon and Korean tangwha (幀畵, altar portrait of Buddha) are based on the similarity of the divine Being. Each has the characteristic index that forms an existential connection with the object and at the same time, implies the symbolic meaning of the scriptures and doctrines of the Russian Orthodox and Buddhists. Russian icon and Korean tangwha with these attributes have origins in the Byzantine, India and China. Unlike most religious art, Russian icon and Korean tangwha clearly reveal profane orientation and mystical elements. This artistic phenomenon has evolved from the mystical religious culture in Russia and tantric rituals of the early Joseon period. Iconostasis, created from historical figures of the Old Testament, Jesus, the New Testament represent the principles of the macrocosm. Each icon of iconostasis has integrity, while each floor has another narrative and a meta-discourse on the entire composition. Three-Platforms of amrtakundalin can also have a huge epic that is directed from the Low-Platform to the High-Platform for the purpose of salvation. While the narrative of iconostasis has a time structure, from the beginning of the universe up to date in chronological time, amrtakundalin have pictorial transitions of time and space that rises from this life to a heavenly world. Despite the different world views of the Russian Orthodox and Buddhists, iconographical format and symbolism of heaven and hell in the Iconostasis, Last Judgment and amrtakundalin are similar. There is a constant antagonism between heaven and hell, light and darkness, water and flame. Iconographical contents include the water of life and nectar, the book of life and 'eoppu', and the scales and mirror of Karma that discriminate between the good and evil before judgment. The dualistic coordinate concept such as light and darkness, life and death, or heaven and hell that appears in the narrative structure of iconostasis, the Last Judgment and amrtakundalin leads the people to spiritual awakening.
The artificial increase in the solar intensity incident on solar cells using lenses or mirrors can allow solar cells to generate equivalent power with a lower cost. There are two types of concentration optics for solar energy conversion. One is to use mirrors, and the other is to use Fresnel lenses. The gains that can be achieved with a Fresnel lens or a parabolic mirror are compared. The result showed the gains are comparable and the two configurations were developed competitively. In application areas of Fresnel lenses as solar concentrators, several variations of design were devised and tested. Some PV systems still use commercially available flat Fresnel lenses as concentrators. A convex linear Fresnel lens to improve the concentration ratio and the efficiency is devised and flat linear Fresnel lens in thermal energy collection is utilized. In this study, we designed and optimized flat Fresnel lens and the 'light pipe' to develop 500X concentrated solar PV system. In the process, we compare the transmission efficiencies according to groove types. We performed rigorous ray tracing simulation of the flat Fresnel lenses. The computer aided simulation showed the 'grooves in case' has the better efficiency than that of 'grooves out case'. Based on the ray-trace results we designed and manufactured sample Fresnel lenses. The optical performance were measured and compared with ray-trace results. Finally, the optical efficiency was measured to be above 75%. All the design and manufacturing were performed based on that InGaP/InGaAs/Ge triple junction solar cell is used to convert the photon energy to electrical power. Field test will be made and analyzed in the near future.
This article reviews previous literature on the metaverse and attempts to provide a refined definition for this phenomenon. Metaverse has recently been in the spotlight among discussions by the industry and the media while a consensus on the exact definition of metaverse is yet to be determined. Since Neal Stephenson first coined the term metaverse in his novel "Snow Crash" in 1992, the Acceleration Studies Foundation (ASF) was the first to analyze the concept of metaverse in 2007. While ASF's effort did not receive much spotlight it may have deserved, metaverse gained much attention in the fall of 2020 when NVIDIA announced its real-time simulation and collaboration platform for 3D production named "Omniverse" as a next-generation alternative for the Internet along with Roblox defining its service as metaverse during its IPO. Since then, metaverse has been commonly recognized as a world where we can cross over reality and virtuality. Based on the two axes and four scenarios proposed by the ASF, we review the literature across four realms as follows - virtual reality, mirror world, augmented reality, and lifelogging. Then, we examine the issues with the existing definition of metaverse and propose an alternative explanation by focusing on human behavior and user experience. Finally, we reassess the concept of metaverse and incorporate human communication, reality-based and virtual-based activities, and eXtended reality as elements to properly define metaverse.
Son Jinchaek got into his directing career since 1976 when he founded the theatre group Minye with Huhgyu and others. His experience in Minye was the turnaround of his life; Huhgyu was a teacher in his artist's life whereas Brecht was a teacher for his ideology to make 'Korean Theatre'. From these two teachers, he learned how and why Korean Theatre should be made. Since then, Korean theatre was his calling for 40 years of his directing career. As he established Michoo in 1986, it served a turning point in his art. His focus was on intrinsic attributes of Korean Theatre with Madang Jungshin. With Madang Jungshin, he tried to get over the former generation's fixation on external materials of Korean traditional theatre and folk culture to make Korean Theatre. Rather, he believed Korean Theatre could be realized when it grafted Korean social reality onto the stage, while the form was subsequent. He advocated Korean Theatre should mirror present social reality and circulate social energy. Also, he did not give up aesthetics. On the contrary, his aesthetic style was conspicuously evident in his productions. In spite of his life long career with noteworthy works, the critical discourses are strikingly scarce especially when compared with other senior and peer directors such as Hugh Gyu, Ahn Minsoo, Oh Taesok, and Lee Yoontaek. During his career he has crossed into various genres from Changeuk, Madangnori, and to theatres, which were too versatile to thread them into a discourse and caused a lack of theoretical greeting. Madangnori has anchored its artistic structure on its polished aesthetics which were acclaimed by the general audience for 30 years. For theatre, he concentrated on one production per year to grasp its own style. Theatre works also had revealed his own style of being opened and of being emptied which was certainly different from Madangnori, but had same aesthetic principle within it. This paper attempts to recompose his stylistic features with 'Madang aesthetics' which were based on open space, open acting style, and graphic ensemble. This paper tries to demonstrate how his 'Madang aesthetics' has refined his productions in scenography, acting style, and in more like metaphoric and metonymic symbolic expression of the graphic ensemble. To do this, two productions were explored: eLee Chunpoongjeun and Yulha Ilgyee Manbo. Madangnori was sorely explored by Son Jinchaek with his artistic colleagues Yoon Munshik, Kim Jongyeup, Kim Sungnyu, music designer Park Buhmhoon, and choreographer Guk Sooho. Though it has been ignored for its popular appeal by the doctrinaire theoretical opinions, it started to pull academic attention recently. His theatres are also getting sharp with his 'Madang aesthetics' as well as minimalistic expression in scenography, acting style, and graphic ensemble. Madang Jungshin is the soul and Madang aesthetics is the body in his artistic works. The Madang Jungshin animates the Madang aesthetics, so they become alive in his theatre.
The purposes of this study are to identify the meaning of the geometrical patterns preferred by ancient Korean peoples and to classify them into some groups by their similarity. We investigated various patterns found on clothing and relics from GoJoseon to Goguryeo period, and utilized secondary sources such as history articles, Internet materials and photo and analyzed the associations of the varied patterns found in pottery, handicrafts, and clothing with the ancient cultures. We found the letters (ㅇ, ㅁ, and ㅅ of Korean alphabet, Hangul) preferred by ancestors who worshipped nature to identify the significations attached by them to particular patterns. The results confirm the following: first, the circle pattern indicated the sun, moon, stars in the sky, a bronze mirror, and a man's face. Circles and ovals were also observed to represent the individual souls of the clan or community. Second, square patterns symbolized the land and the patterns that signified the wellbeing of family and the country. Oblique rectangles were more frequently used as they represented a double use of the triangle, a shape that implied mystic power. Third, triangle symbolized regeneration, power, and humanity. While the Neolithic Age jade remnants of hair combs appear not to be irrelevant to the process of comb-shaped pottery production of the time, many fine comb-like lines may be found on bronze mirrors. Through its review of the glorious designs inherited from and established by ancient ancestors, the present research endeavor may help in identifying the spirits and traditions of Korean history.
Language is an important medium for communication among the members of society and a mirror that reflects society as a whole. As society and culture change and develop over centuries, language follows suit. To keep up with the changes in the new era and express new concepts, countless new neologisms continue to appear. Recently, the use of neologisms is getting increasingly focused on social networking service and other Internet communication sites, which then spread rapidly through various media. If you look at the popular neologisms on the Internet, it implicitly reflects conflicts between the eras and the generations, people's psychology and ideology, and social phenomena such as culture. The function of neologisms is not solely for the entertainment element of communication but also for criticizing social problems and their vital use as a search keyword. This study focuses on the meaning and importance of gathering information and analyzing records about neologisms that reflect the social phenomenon in a certain period, and this will be labeled as "neologism archiving." This study proposes a direction for the construction of a neologism archive by comparing the currently existing neologism archiving system with the existing dictionary concept. In addition, this study serves as a reminder of the convenience and the contemporary social phenomena, such as smooth communication between generations, and the dissemination of inequality of information sharing. Lastly, this study aims to support experts with their research on neologisms for the social phenomenon.
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