• Title/Summary/Keyword: interfaces

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The Mechanical Sensitivity at Interfaces between Bone and Interbody Cage of Lumbar Spine Segments (Lumbar spine 의 뼈와 Interbody cage의 접촉면에서 기계공학적 민감성 고찰)

  • Kim Y.
    • Journal of Biomedical Engineering Research
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    • v.21 no.3 s.61
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    • pp.295-301
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    • 2000
  • It is known that among many factors, relative micromotion at bone/implant interfaces can hinder bone ingrowth into surface pores of an implant. Loading conditions, mechanical properties of spinal materials, friction coefficients at the interfaces and geometry of spinal segments would affect the relative micromotion and spinal stability. A finite clement model of the human lumbar spine segments (L4-L5) was constructed to investigate the mechanical sensitivity at the interfaces between bone and cage. Relative micromotion. Posterior axial displacement. bone stress, cage stress and friction force were predicted in changes of friction coefficients, loading conditions. bone density and age-related material/geometric properties of the spinal segments. Relative micromotion (slip distance in a static loading means relative micromotion in routine activity) at the interfaces increased significantly as the mechanical properties of cancellous bone, annulus fibers or/and ligaments decrease or/and as the friction coefficient at the interfaces decreases. The contact normal force at the interfaces decreased as cancellous bone density decreases or/and as the friction coefficient increases A significant increase of slip distance at anterior annulus occurred with an addition of torsion to compressive preload. Relative micromotion decreased with an increase of disc area. In conclusion. relative micromotion, stress response. Posterior axial displacement and contact normal force are sensitive to the friction coefficient of the interfaces, bone density, loading conditions and age-related geometric/material changes.

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Standardization of Application Programming Interfaces for ATM Networks (ATM 네트워크를 위한 응용 프로그래밍 인터페이스 표준화 연구)

  • 주성순
    • Proceedings of the IEEK Conference
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    • 1998.10a
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    • pp.313-316
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    • 1998
  • Inspired by the principle of the open market, a future network service model is forced to permit a much greater degree of flexibility, reconfigurability, programmability, protability and maintainability in telecommunication infrastructure. In this paper, one of standardization activities for the open programmable network model, IEEE standardization project P1520 (Application Programming Interfaces for Networks), is discussed.

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Direct Observations of Al-Si Junction Interface (Al-Si 접합부의 직접관찰)

  • Lee Ki-Seon
    • Applied Microscopy
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    • v.8 no.1
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    • pp.77-79
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    • 1978
  • Al-Si junctions were made by vacuum deposition of aluminium on to silicon wafers and examined by TEM. The uneven interfaces of the junctions are formed due to the surface tension of the molten solution resulting in preferential dissolution of silicon in aluminium at some areas. These undesirable uneven interfaces affect the junction shape and so the over-all characteristics of the devices.

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Speech Based Multimodal Interface Technologies and Standards (음성기반 멀티모달 인터페이스 및 표준)

  • Hong Ki-Hyung
    • MALSORI
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    • no.51
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    • pp.117-135
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    • 2004
  • In this paper, we introduce the multimodal user interface technology, especially based on speech. We classify multimodal interface technologies into four classes: sequential, alternate, supplementary, and semantic multimodal interfaces. After introducing four types of multimodal interfaces, we explain standard activities currently being activated.

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IEEE Standard for Passenger Tram Auxiliary Power System Interfaces (객차 보조전원장치 interface를 위한 IEEE표준)

  • 노성찬;임응규;김윤호
    • Proceedings of the KSR Conference
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    • 2002.10a
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    • pp.534-546
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    • 2002
  • The electrical interfaces among the components comprising the auxiliary power systems and their electrical interface with other train-borne systems are described. As such, this standard treats the auxiliary power system compononents as black boxes and addresses only their interface requirements.

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User's emotion while browsing 3D web interfaces (3D 웹 인터페이스 브라우징에서의 사용자 감성어휘 도출)

  • Lee, Yu-Yeung;Ryoo, Han-Young;Jeong, Sang-Hoon
    • Science of Emotion and Sensibility
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    • v.13 no.4
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    • pp.659-668
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    • 2010
  • This paper examines users' emotion from both 2D and 3D web interfaces and finds their differences. First, 77 words representing users' emotion were collected from the previous research papers. Second, a web survey system was developed using these collected words and prepared 3 web interface prototypes to collect users' emotions from different types of web interfaces. Finally, a web survey was conducted and its results were analyzed. The result of the survey showed that there were emotional words that were commonly experienced from either 2D or 3D web interfaces. However, it also showed that there were emotional differences between 2D and 3D web interface; 3D web interfaces provide users with specific emotional experiences because of their own characteristics - depth and dynamic movement. It is believed that the words collected from the survey could be the criteria to evaluate the quality of the 3D web interfaces and encourage the research on users' emotion from 3D interfaces.

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Design of menu structures for the human interfaces of electronic products (전자제품 휴먼 인터페이스의 메뉴 설계 방안)

  • 곽지영;한성호
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1995.04a
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    • pp.534-544
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    • 1995
  • Many electronic products employ menu-driven interfaces for user-system dialogue. Unlike the software user interfaces, a small single-line display, such as a Liquid Crystal Display, is typically used to present menu items. Since the display can show only a single menu item at a time, more serious navigation problems are expected with single-line display menus(SDM). This study attempts to provide a set of unique guidelines for the design of the SDM based on empirical results. A human factors experiment was conducted to examine the effects of four design variables: menu structure, user experience, navigation aid, and number of targets. The usability of design alternatives was measured quantitatively in four different aspects, which were speed, accuracy, inefficiency of navigation, and subjective user preference. The analysis of variance was used to test the statistical effects of the design variables and their interaction effects. A set of design guidelines was drawn from the results which can be applied to the design of human-system interfaces of a wide variety of electronic consumer products using such displays. Since more generalized guidelines could be provided by constructing prediction models based on the empirical data, some powerful performance models are also required for the SDM. As a preliminary study, a survey was done on the performance models for ordinary computer menus.

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Analyzing the Impact of Supply Noise on Jitter in GBPS Serial Links on a Merged I/O-Core Power Delivery Network

  • Tan, Fern-Nee;Lee, Sheng Chyan
    • Journal of the Microelectronics and Packaging Society
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    • v.20 no.4
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    • pp.69-74
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    • 2013
  • In this paper, the impact of integrating large number of I/O (Input-Output) and Core power Delivery Network (PDN) on a 6 layers Flip-Chip Ball Grid Array (FCBGA) package is investigated. The impact of core induced supply noise on high-speed I/O interfaces, and high-speed I/O interface's supply noise coupling to adjacent high-speed I/O interfaces' jitter impact are studied. Concurrent stress validation software is used to induce SSO noise on each individual I/O interfaces; and at the same time; periodic noise is introduced from Core PDN into the I/O PDN domain. In order to have the maximum coupling impact, a prototype package is designed to merge the I/O and Core PDN as one while impact on jitter on each I/O interfaces are investigated. In order to understand the impact of the Core to I/O and I/O to I/O noise, the on-die noise measurements were measured and results were compared with the original PDN where each I/O and Core PDN are standalone and isolated are used as a benchmark.

Quantitative Analysis on Electrochemical Phenomena at the Colloidal Semiconductor Interfaces (Colloid 半導體 界面의 電氣化學的 現象에 關한 定性的 解析)

  • Chun, Jang-Ho
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.25 no.10
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    • pp.1209-1215
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    • 1988
  • A space charge effect at the doped silicon semiconductor/organic solvent ($C_6H_6$, $CH_3OH$, $C_2H_5OH$) interfaces and a mechanism for two reversals of zeta potentials at the undoped polycrystalline gallium arsenide semiconductor/electrolyte (NaCl, KCl, KI solution) interfaces has been qualitatively analyzed using microelectrophoresis measurements. It has been found that the space charge effect in the organic solvents can be neglected and the two reversals of zeta potentials depend on surface states, specific adsorption, electronegativity and size of specifically adsorbed ions at the undoped polycrystalline gallium arsenide/electrolyte interfaces. The position of shear plane of colloidal semiconductors is a fixed distance from the surface and is almost or exactly coincides with the outer Helmholtz plane (OHP).

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