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Multi-focus 3D display of see-through Head-Mounted Display type (투시형 두부 장착형 디스플레이방식의 다초점 3차원 디스플레이)

  • Kim, Dong-Wook;Yoon, Seon-Kyu;Kim, Sung-Kyu
    • Journal of Broadcast Engineering
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    • v.11 no.4 s.33
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    • pp.441-447
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    • 2006
  • See-through HMD type 3D display can provide an advantage of us seeing virtual 3D data used stereoscopic display simultaneously with real object(MR-Mixed Reality). But, when user sees stereoscopic display for a long time, not only eye fatigue phenomenon happens but also de-focus phenomenon of data happens by fixed focal point of virtual data. Dissatisfaction of focus adjustment of eye can be considered as the important reason of this phenomenon. In this paper, We proposed an application of multi-focus in see-through HMD as a solution of this problem. As a result, we confirmed that the focus adjustment coincide between the object of real world and the virtual data by multi-focus in monocular condition.

Differences in retention of the reduction direction depending on dimensions and design CAD/CAM zirconia abutment for implant (Implant에 사용되는 CAD/CAM 전용 zirconia abutment의 표면적과 디자인에 따른 유지력 차이)

  • Nam, Taeg-Mo;Kim, Han-Gon;Kim, Byung-Sik;Lim, Si-Duk
    • Journal of Technologic Dentistry
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    • v.32 no.4
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    • pp.317-325
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    • 2010
  • Purpose: The aim of this study is to make some basic materials to find retention force difference based on the total height of CAD/CAM zirconia abutment used for implant, retention force difference based on how to regulate the height of the abutment, retention force difference based on the size and retention force difference based on the design group. Methods: The retention force was measured by being pulled at the speed of 1mm/min after being combined with zirconia block and abutment using Temp-BOND of Kerr. The experiment was done at the research lab of OSTEM in Busan by useing UNIVERSAL TESTING MACHINE on March 3rd, 2010. Results: After analysing the total height and the retention force, p-value had minor difference by 0.01 statistically. Namely, 3mm, 4mm, 5mm had the retention force difference and we could see retention force difference on 3mm and 5mm at the post test. After analyzing how to regulate the height and retention force, p-value had minor difference by 0.000 statistically. Namely, 1mm and 2mm had the retention difference and we could see that 1mm and 2mm with the total height had retention difference. After analyzing the retention force based on the size, p-value had minor retention force difference by 0.000 statistically. Namely, 7 different size had retention force difference and we could see the size 21.9mm, 32.9mm, 32.9mm, 38.4mm, 48.9mm and 54.9mm had retention force difference. Conclusion: Namely 9 different design group had retention difference and we could see that 9 design group with 5.6.7.8 design group and 9 design group with 1.2.3.4. design group had retention force.

A Study on Floating Collar of Dragged Gears (인망그물의 부양깃판에 관하여)

  • 장지원
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.22 no.1
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    • pp.1-5
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    • 1986
  • In order to improve the net-mouth height of dragged gears, the authors devised models of floatingcollars of nylon cloth instead of floats and experimented with 4 types-A type (length 65em, breadth 3em), B type (length 65em, breadth 4em), C type (length 65em, breadth 5em) and D type (length 65 em, breadth 6em) attached respectively to the front edge of square of a model net after preliminary experimentation. These various types of floating collars were experimented in a circulating water channel to evaluate the characteristics of net-mouth height and hydrodynamic resistance and the effect of the length of bridles were also examined. The results obtained were as follows: 1. In case of attaching floats, the model net-mouth height reduced from 80 em to 20 em when current velocity was increased from 0.25m/see to 1m/sec. 2. In case of attaching floating collars, the model net-mouth heights were maintained 70 em, 71 em, 80 em, 78 em in maximum and 55 em, 63 em, 69 em, 73 em in minimum respectively even the current volocity was increased from 0.25 m/see to 1 m/see. 3. The model net-mouth height was reduced to 10 em maximum according to the current velocity and types of floating collars when the bridles were shortened 3~4 mm in length. 4. Hydrodynamic resistance of D type only was increased to 700 g in maximum and those of A, B, C type were reduced to 460 g in maximum at current velocity beyond 0.5 m/ see when bridles were shortened 3-4 mm in length. 5. But the model net-mouth heights became higher in accordance with breadth of floating coliars, B type was the best for this model net in case that hydrodynamic resistance was taken into account.

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State Territoriality and Spaces of Exception in East Asia : Universalities and Particularities of East Asian Special Zones (동아시아에서 국가의 영토성과 예외적 공간 : 동아시아 특구의 보편성과 특수성)

  • Park, Bae-Gyoon
    • Journal of the Korean association of regional geographers
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    • v.23 no.2
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    • pp.288-310
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    • 2017
  • This paper aims to provide a conceptual framework to see the special zones in East Asia in relation to the territorialities of the state. For this, it will introduce Aihwa Ong's notion of 'spaces of exception', and provide some critical discussions on it. Unlike Ong, I do not see the spaces of exception as an outcome of neoliberal changes of the state. Instead, I propose to see the special zones in terms of the internal limitations of the modern state territoriality. In particular, I try to theorize the special zones in relation to the dialectics of the contradictory relations between mobility and fixity inherent in the territoriality of the modern nation state. In addition, it will be suggested to see special zones as an essential part of the spatiality of the East Asian developmental states, given the spatio-temporal contexts of the East Asian capitalist development. On the basis of these theoretical discussions, this paper will divide the special zones that have been developed in East Asia since the 1960s into 3 different types, including 1) developmentalist special zones, 2) neo-liberal special zones, and 3) special zones for transition, and discuss their characteristics.

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Virulence Genes of Staphylococcus aureus Isolated in Daegu and Gyeongsangbuk-do Areas (대구광역시와 경상북도 지역에서 분리한 Staphylococcus aureus 병독소 유전자의 분자적 연구)

  • Jeon, Seok-Jae;Lee, Hee-Moo
    • Korean Journal of Clinical Laboratory Science
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    • v.40 no.1
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    • pp.48-54
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    • 2008
  • Nine types of staphylococcal enterotoxin (SE) genes (sea~see, seg~sej), 3 types of virulence genes (eta, etb, tst), mecA and 16S rRNA as internal positive control were detected from 187 clinical MRSA (methicillin resistance Staphylococcus aureus) strains isolated from a variety hospitalized patients in Daegu and Gyeongsangbuk-do areas using the multiplex PCR. The frequency of the S. aureus strains harboring recently reported SE genes (seg~sej) were found to be very high (65.9%) and greater than that of the strains harboring classical SE (sea~see) genes (47.8%) as previously established. Taking into account that the newly described pairs form SE genes (i.e., sec+seg+sei, seg+sei) were many, in the other hand, single form SE genes (i.e., seg, seh, sei and sej) were rarely detected. The S. aureus with pairs form enterotoxigenic genes become more potentially toxigenic strains. Furthermore, this work indicated a systematic association between the seg and sei genes and their high incidence among the S, aureus strains, which suggests that these two SE's could be an important phylogenetic link among the staphylococcal enterotoxins.

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A Study on Solid-Phase Epitaxy Emitter in Silicon Solar Cells (고상 성장법을 이용한 실리콘 태양전지 에미터 형성 연구)

  • Kim, Hyunho;Ji, Kwang-Sun;Bae, Soohyun;Lee, Kyung Dong;Kim, Seongtak;Park, Hyomin;Lee, Heon-Min;Kang, Yoonmook;Lee, Hae-Seok;Kim, Donghwan
    • Current Photovoltaic Research
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    • v.3 no.3
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    • pp.80-84
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    • 2015
  • We suggest new emitter formation method using solid-phase epitaxy (SPE); solid-phase epitaxy emitter (SEE). This method expect simplification and cost reduction of process compared with furnace process (POCl3 or BBr3). The solid-phase epitaxy emitter (SEE) deposited a-Si:H layer by radio-frequency plasma-enhanced chemical vapor deposition (RF-PECVD) on substrate (c-Si), then thin layer growth solid-phase epitaxy (SPE) using rapid thermal process (RTP). This is possible in various emitter profile formation through dopant gas ($PH_3$) control at deposited a-Si:H layer. We fabricated solar cell to apply solid-phase epitaxy emitter (SEE). Its performance have an effect on crystallinity of phase transition layer (a-Si to c-Si). We confirmed crystallinity of this with a-Si:H layer thickness and annealing temperature by using raman spectroscopy, spectroscopic ellipsometry and transmission electron microscope. The crystallinity is excellent as the thickness of a-Si layer is thin (~50 nm) and annealing temperature is high (<$900^{\circ}C$). We fabricated a 16.7% solid-phase epitaxy emitter (SEE) cell. We anticipate its performance improvement applying thin tunnel oxide (<2nm).

Development and Effects of Smartphone App-Based Exercise Program for Hemodialysis Patients (혈액투석 대상자를 위한 스마트폰 앱 기반 운동프로그램 개발 및 효과)

  • Ki, Eun Jeong;So, Hyang Sook
    • Journal of Korean Academy of Nursing
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    • v.50 no.1
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    • pp.52-65
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    • 2020
  • Purpose: To examine the effects of a smartphone application-based exercise program on self-efficacy expectations (SEE) and outcome expectations regarding exercise (OEE), physical fitness, activity level, physiological indices, and health-related quality of life in a sample of hemodialysis patients. Methods: A quasi-experimental control group pre-test post-test design was used. Subjects were recruited from two university hospitals in G city. The subjects were assigned randomly by coin toss: 33 participants to the experimental group and 30 to the control group. A literature review and the self-efficacy theory were used to develop the smartphone program. Experts designed and verified the program to be userfriendly and in consideration of user interaction. Data were collected through a self-report pre-test post-test questionnaire and online medical records. Results: In the experimental group, the levels of physical fitness and physical activity were significantly improved post-test, but the scores on health-related quality of life and the physical indices did not improve. In the experimental group, the SEE and OEE post-test scores were also significantly higher than the pre-test scores, but the control group's scores did not change. Conclusion: The smartphone application-based exercise program based on self-efficacy theory significantly improved the level of physical fitness and activity, SEE, and OEE for hemodialysis patients. The use of this application-based exercise program for hemodialysis patients might be an effective nursing intervention tool for improving SEE, OEE, level of physical fitness, and physical activity.

Development of Stereoscopic 3D Personalized Adventure Game: HowSee (3D 체험형 어드벤처 게임 "HowSee" 개발)

  • Lim, C.J.;Chung, S.T.;Choi, Seung-Hoon;Lee, Chang-Nam;Song, Jang-Sup
    • Journal of Korea Game Society
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    • v.11 no.5
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    • pp.13-22
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    • 2011
  • Advances in display technology, stereoscopic (S3D) in the development of social interest in the content development approach is high but it does not make the standardization of interactive 3D content creation performance is very poor. In this paper, real-time video input from an infrared camera that is based on eye tracking implementation user interface developed 3D interactive adventure game "HowSee" was the process of developing skills in the process, an efficient 3D content production methods were presented. unnormalized S3D-based game content production process on how this development occurred in the trial and how to troubleshoot S3D games, etc. to streamline content creation can be a basis for.

Change of the Age of TV Cooking Programs (TV 요리 프로그램의 시대적 변화에 대한 연구)

  • Chung, Tae-Sub
    • The Journal of the Korea Contents Association
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    • v.19 no.6
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    • pp.379-386
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    • 2019
  • It is a study of the changing times of cooking programs that were broadcast and aired on TV. The media has shown a lot of changes in appearance, and it's also showing a lot We want to look at various changes and changes in the times through programs on cuisine and food that many people now prefer. In the preceding study, we looked at changes in media formats and changes in social changes and programs until the 2000s. Based on this analysis, the changes of the cooking program were analyzed according to the changes of the times. For the purpose of this study, changes were divided into cooking and historical changes, which were divided and examined by the period. Through this study, we were able to see the change in the cooking program in an era where changes in diet are mixed with changes in culture. It was possible to see the change through programs that consumers could feel, not unilateral delivery of information, and to see the change from the era of experts to culture. Further, through the introduction and challenge of local culture through food, subsequent research aims to see changes and social phenomena caused by the division of programs.

Human Theory of Change a basis God of Superiority and Immanence in Eastern learning - from Human should be Attend God to Human being God (동학(東學)에 있어서 천주의 초월성과 내재성에 근거한 인간관의 변화 - 시천주(侍天主)에서 인내천(人乃天)으로의 변화 -)

  • Yi, Jong-woo
    • The Journal of Korean Philosophical History
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    • no.23
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    • pp.245-273
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    • 2008
  • Choi Je Woo was stressed superiority of god and it was immanence. IT was religion human theory. Choi See Hyung and Son Byung Hee writed change from god to the heaven. It was stressed superiority of god better than immanence of heaven. Choi Je Woo of human must attend god changed Choi See Hyung and Son Byung Hee of human being god. Choi See Hyung and Son Byung Hee was stressed the subject. Choi Je Woo was stressed superiority of god speciality. Choi See Hyung and Son Byung Hee was not disappeared absolutely. Son Byung Hee of human being god disappeared absolutely because it leave only immanence of god by Yi Don Hwa.