• Title/Summary/Keyword: Interface

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Structural Study of Interface Layers in Tetragonal-NiSi (010)/Si using Density Functional Theory (밀도범함수를 이용한 정방정계-NiSi (010)/Si 계면 층의 구조 연구)

  • Kim, Dae-Hee;Kim, Dae-Hyun;Seo, Hwa-Il;Kim, Yeong-Cheol
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.5
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    • pp.377-381
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    • 2009
  • Tetragonal-NiSi (010)/Si superstructures were calculated for studying the interface structure using density functional theory, The orthorhombic-NiSi was changed to the tetragonal-NiSi to be matched with the Si surface for epitaxy interface. The eight interface models were produced by the type of the Si surfaces, The tetragonal-NiSi (010)/Si (020)[00-1] superstructure was energetically the most favorable, and the interface thickness of this superstructure was the shortest among the tetragonal-NiSi (010)/Si superstructures. However, in the case of tetragonal-NiSi (010)/Si (010)[00-1] superstructure, it was energetically the most unfavorable, and the interface thickness was the longest. The energies and interface thicknesses of tetragonal-NiSi (010)/Si superstructures were influenced by the coordination number of Ni atoms and the bond length between atoms located at the interface.

An Area Efficient Network Interface Architecture (NoC에서 면적 효율적인 Network Interface 구조에 관한 연구)

  • Lee, Ser-Hoon;Hwang, Sun-Young
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.5C
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    • pp.361-370
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    • 2008
  • NoC is adopted for data communication between processors and IPs in MPSoC system. NoC has an advantage of scalability in that system can be easily expanded just by adding switches. However, as the number of switches increases, chip area increases as well as data transfer latency. This paper proposes an architecture that can reduce the number of switches in the system by sharing network interfaces. To reduce NI area, the modules sharing network interface use a common buffer in network interface. Experimental results show that the chip area has been reduced by 46.5% and data transfer latency by 17.1%, respectively, compared to conventional architecture.

Digital Epistemology and New Design Thinking of Interface (디지털 인식론과 새로운 인터페이스 디자인 사고)

  • Oh, Chang-Sup
    • Archives of design research
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    • v.19 no.2 s.64
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    • pp.183-194
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    • 2006
  • This thesis, in terms of epistemology, aims to show the new possibility of digital interface. First, the thesis surveys the history of digital interface, and clarifies that current interface is the product of accidental gauge. The fact that it is not the inevitable result hints the infinite area of new digital interface. The current limited interface comes from the limited understanding of digital technologies and digital media. For example, it can be referred to metaphoric comprehension, 'black box.' This thesis tries to get over such comprehension, considering digital as a kind of light. New epistemology in which digital is regarded as light and medium extends to the ethics that interface design should become a creative activity, accepting the difference and making a new design.

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Design and Implementation of RAID Controller using Serial ATA Interface (Serial ATA Interface를 통한 RAID Controller 보드의 설계 및 구현)

  • Lim, Seung-Ho;Lee, Ju-Pyung;Park, Kyu-Ho
    • Proceedings of the KIEE Conference
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    • 2003.11c
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    • pp.665-668
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    • 2003
  • In this paper, we have designed and implemented the RAID controller board which connects to the host computer with serial ATA interface and connects to the disks with parallel ATA interface. Serial ATA interface is proposed to overcome the design limitation of parallel ATA while enabling the storage interface to scale with the slowing media rate demands for PC platforms. Serial ATA is to replace parallel ATA with the compatibility with existing operating systems and drivers, adding performance headroom for years to come. It Moreover, serial ATA provides even faster transfer rate of 150 Mbytes/s which is larger than that of current parallel ATA. The RAID controller board designed in this paper combines up to 4 disks with parallel ATA interface, and connects to PC host computer with serial ATA interface. We have implemented RAID controller using Verilog HDL language with FPGA chip. The RAID controller supports RAID level 0 and 1 functionality. Experimently, the average read/write performance of parallel ATA interface is about 30 Mbytes/s. Therefore, when 4 parallel disks is connected to the RAID controller board, we can get almost full throughput of serial ATA protocol using the RAID level 0 configuration with 4 disks.

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Improving Eye-gaze Mouse System Using Mouth Open Detection and Pop Up Menu (입 벌림 인식과 팝업 메뉴를 이용한 시선추적 마우스 시스템 성능 개선)

  • Byeon, Ju Yeong;Jung, Keechul
    • Journal of Korea Multimedia Society
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    • v.23 no.12
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    • pp.1454-1463
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    • 2020
  • An important factor in eye-tracking PC interface for general paralyzed patients is the implementation of the mouse interface, for manipulating the GUI. With a successfully implemented mouse interface, users can generate mouse events exactly at the point of their choosing. However, it is difficult to define this interaction in the eye-tracking interface. This problem has been defined as the Midas touch problem and has been a major focus of eye-tracking research. There have been many attempts to solve this problem using blink, voice input, etc. However, it was not suitable for general paralyzed patients because some of them cannot wink or speak. In this paper, we propose a mouth-pop-up, eye-tracking mouse interface that solves the Midas touch problem as well as becoming a suitable interface for general paralyzed patients using a common RGB camera. The interface presented in this paper implements a mouse interface that detects the opening and closing of the mouth to activate a pop-up menu that the user can select the mouse event. After implementation, a performance experiment was conducted. As a result, we found that the number of malfunctions and the time to perform tasks were reduced compared to the existing method.

Evaluation of Shear Strength at Interface Between Geotextile and Cementitious Binder Materials (시멘트계 결합재가 적용된 지오텍스타일의 접촉면 전단강도 평가)

  • Son, Dong-Geon;Byun, Yong-Hoon
    • Journal of The Korean Society of Agricultural Engineers
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    • v.64 no.1
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    • pp.91-98
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    • 2022
  • Multi-layered geotextile tubes may have problems on its stability when used as cofferdam. This study presents the shear strength characteristics at the interface between geotextiles and a cementitious binder material to improve the stability of the multi-layered geotextile tubes. In this study, two different types of geotextiles are used. After mixing with a rapid setting cement, fly ash, sand, accelerator, and water, the cementitious binder material is prepared at the interface between two geotextile samples and cured under water for a desired period. The specimen is placed on upper and lower direct shear boxes by using clamping systems. A series of direct shear tests for two different geotextiles are performed along the curing time under three vertical stresses. Experimental results show that the shear strength at the interface between the cementitious binder material and geotextiles is greater than that at the interface between two geotextiles. For two types of geotextiles, apparent cohesion occurs at the interface between the cementitious binder material and geotextiles. In addition, the friction angles for any curing time are improved, compared to the interface between two geotextiles. The cementitious binder material suggested for the interface between two geotextiles may be useful for the reinforcement of multi-layered geotextile tubes.

Experimental study on damage and debonding of the frozen soil-concrete interface under freeze-thaw cycles

  • Liyun Tang;Yang Du;Liujun Yang;Xin Wang;Long Jin;Miaomiao Bai
    • Structural Engineering and Mechanics
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    • v.86 no.5
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    • pp.663-671
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    • 2023
  • Freeze-thaw cycles induce strength loss at the frozen soil-concrete interface and deterioration of bonding, which causes construction engineering problems. To clarify the deterioration characteristics of the interface under the freeze-thaw cycle, a frozen soil-concrete sample was used as the research object, an interface scanning electron microscope test under the freeze-thaw cycle was carried out to identify the micro index information, and an interface shear test was carried out to explore the loss law of interface shear strength under the freeze-thaw cycle. The results showed that the integrity of the interface was destroyed, and the pore number and pore size of the interface increased significantly with the number of freeze-thaw cycles. The connection form gradually deteriorates from surface-to-surface contact to point-to-surface contact and point-to-point contact, and the interfacial shear strength decreases the most at 0-3 freeze-thaw cycles, with small decreases from to 3-8 cycles. After 12 freeze-thaw cycles, the interfacial shear strength tends to be stable, and shear the failure occurs internally in the soil.

A study on Materialization of Virtual Reality for Environmental Interface (환경인터페이스를 통한 가상의 현실화에 관한 연구)

  • Kang, Yoon Jeong
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.6
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    • pp.545-551
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    • 2023
  • In this paper, we present the environment interface as a method of bringing the virtual environment in the interface to reality, and explain the experience of the virtual that can be sensed in the real environment. Expanded experience by discussing the transparency of the interface and interactivity that expands synesthesia as a condition for an interface to express virtual without distinction from the real environment, and establishing a discussion on the composition and inevitability of an environment interface that satisfies these conditions The environment interface is discussed as a tool for realizing the interface that extends from the real environment, the expansion of cognition into the environment by interaction, and the virtual for immersion into the environment due to these conditions.

Guidelines for Mobile Phone User Interface Development (휴대폰 User Interface 개발을 위한 가이드라인)

  • Kweon, O-Seong
    • Science of Emotion and Sensibility
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    • v.12 no.3
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    • pp.325-330
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    • 2009
  • The importance of User Interface (UI) in mobile phone has increased as the complexity of use increases due to the new technology adoption. The complexity and load for user interface development has increased accordingly. This paper discusses how to make a structured UI development process based on the mobile phone UI development case. After the review of UI development process and issues arising during the development, four levels of user interface guidelines are proposed such as macro rules, action templates, application rules and interaction cases. The importance of dealing various interaction case is emphasized which is not referred in the present industry UI guidelines. Most of research related to UI development focus on the target product rather than how to make good UI process. Based on the good UI process, good UI of the product can be realized. This proposed process based on UI guidelines will help to step up the UI development of mobile phone industry. Also, this process can be applied to different products or services.

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Effect mechanism of unfrozen water on the frozen soil-structure interface during the freezing-thawing process

  • Tang, Liyun;Du, Yang;Liu, Lang;Jin, Long;Yang, Liujun;Li, Guoyu
    • Geomechanics and Engineering
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    • v.22 no.3
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    • pp.245-254
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    • 2020
  • The interaction between the frozen soil and building structures deteriorates with the increasing temperature. A nuclear magnetic resonance (NMR) stratification test was conducted with respect to the unfrozen water content on the interface and a shear test was conducted on the frozen soil-structure interface to explore the shear characteristics of the frozen soil-structure interface and its failure mechanism during the thawing process. The test results showed that the unfrozen water at the interface during the thawing process can be clearly distributed in three stages, i.e., freezing, phase transition, and thawing, and that the shear strength of the interface decreases as the unfrozen water content increases. The internal friction angle and cohesive force display a change law of "as one falls, the other rises," and the minimum internal friction angle and maximum cohesive force can be observed at -1℃. In addition, the change characteristics of the interface strength parameters during the freezing process were compared, and the differences between the interface shear characteristics and failure mechanisms during the frozen soil-structure interface freezing-thawing process were discussed. The shear strength parameters of the interface was subjected to different changes during the freezing-thawing process because of the different interaction mechanisms of the molecular structures of ice and water in case of the ice-water phase transition of the test sample during the freezing-thawing process.