• Title/Summary/Keyword: accessible

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Perception of Students with disabilities and their WBI personnel about Web accessibility and its effective instructional design strategies (장애 학습자와 웹 기반 교수자의 웹 접근성에 대한 인식도와 이를 위한 효과적인 교수설계전략)

  • Roh, Seak-Zoon
    • Journal of Internet Computing and Services
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    • v.8 no.2
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    • pp.117-135
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    • 2007
  • There are two purposes of this study; 1) to identify the perception about Web accessibility of students with disabilities and their Web-based Instructional personnel (WBI personnel) in higher education, and 2) to find out effective WBI design strategies actually used by WBI personnel to design and develop accessible Web-Based instruction for students with disabilites. Sixteen students with disabilites and their WBI personnel at a mid-western university in US were recruited for individual interviews. The results showed that WBI personnel did not know about Web accessibility and were not well prepared to make their WBI accessible. They have to provide the equality and quality of life to students with disabilites by making their instruction accessible. They felt that they could not guarantee whether their WBI was accessible even after meeting current standards and guidelines. WBI personnel also suggested that they had to provide students with disabilites with various methods and use appropriate instructional design strategies in order to address their needs. Finally, some effective instructional design used by WBI personnel in order to make WBI accessible were listed.

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On the Improvement of Location Aided Routing in Mobile Ad-hoc Networks (이동 애드혹 네트워크를 위한 개선된 위치기반 라우팅에 관한 연구)

  • Nam, Seung-Min;Paik, Je-Hyup;Kim, Young-Beom
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.105-108
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    • 2005
  • Recently, there have been active research efforts on devising efficient routing algorithms utilizing location information in ad-hoc mobile networks. In this paper, we propose a new method to improve the performance of the widely recognized Location Aided Routing (LAR) algorithm. To this end, we suggest the concept of accessible zone combined with the basic two schemes associated with LAR algorithm. Through the proposed algorithm, we can confine the flooding area within accessible zone, thereby reducing the routing delay.

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Combustion Characteristics Using a S.I. Optically Acessible Engine with SCV (SCV를 장착학 가솔린 가시화엔진에서의 연소특성)

  • 정구섭;김형준;전충환;장영준
    • Journal of Advanced Marine Engineering and Technology
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    • v.25 no.1
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    • pp.115-123
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    • 2001
  • This study describes the combustion characteristics under various condition of air excess ratio and ignition timing in a 2-valve gasoline optically accessible engine with swirl control valve(SCV). It adapted three different types of SCA(open ration 72.5%, 78%, 89%) to strengthen a swirl flow. Pressure data were acquired using pressure sensor to investigate the effect of swirl flow on combustion, and from these pressure data, IMEP(indicated mean effective pressure) and MFB(mass fraction burnt)were calculated to explain burn rate and flame speed. From acquired flame images, inspected the flame propagation direction, flame area, and flame centroid, Flame propagation direction was shown different tendency between with/without SCV, and flame area with SCV was faster and larger than that of conventional engine. Finally, the representative flame image at each crank angle were acquired by PDF method to verify flame growth process. It is found that strengthened swirl flow is more beneficial for faster and stable combustion.

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THERMO-MECHANICAL ANALYSIS OF OPTICALLY ACCESSIBLE QUARTZ CYLINDER UNDER FIRED ENGINE OPERATION

  • Lee, K.S.;Assanis, D.N.
    • International Journal of Automotive Technology
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    • v.1 no.2
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    • pp.79-87
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    • 2000
  • Analytical approach was followed in this work under both the steady state and transient operating conditions to find optimum boundary conditions, where the optically accessible quartz engine can run safely without breaking. Temperature and stress distribution was predicted by FEM analysis. In order to validate thermal boundary condition, model reliability and constraint, outside cylinder temperature was measured and previous study was also followed up numerically. To reduce thermal stress level, three types of outside cooling (natural, moderate forced and intensive forced convection) were considered. Effects of clamping force and combustion pressure were conducted to investigate mechanical stress level. Cylinder thickness, was changed to fine the optimum cylinder thickness. The versatile results achieved from this work can be basic indication, which is capable of causing a sudden quartz cylinder breaking during fired operation.

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Soot Concentration Measurement in Diesel Engine Using Laser Sheet Beam (레이저 시트빔을 이용한 디젤엔진의 Soot 농도 계측)

  • Lee, J.S.
    • Journal of ILASS-Korea
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    • v.5 no.1
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    • pp.23-29
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    • 2000
  • Recently the laser sheet technique has been developed to improve our limited understanding of the in-cylinder diesel combustion. The technique is capable of high temporal and spatial resolution, so that it is proved to be an adequate combustion diagnostics to find out exhaust emission formation. The optical signals of LIS(Laser Induced Scattering) and LII(Laser Induced Incandescence) images show informations for soot concentration within the optically accessible diesel engine. The LIS and LII signal images of soot concentration provide new insight into where and when soot occurs in a diesel engine.

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Fabrication and Response Characteristics of Multi-walled Carbon Nanotube Film Humidity Sensor (다중벽 탄소나노튜브 습도센서의 제작과 응답특성)

  • Park, Chan-Won
    • Journal of Industrial Technology
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    • v.34
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    • pp.39-43
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    • 2014
  • This paper represents a highly porous MWCNT film electrode with interconnected open pores and demonstrated the possibility of using an MWCNT network film as the top electrode for polyimide capacitive humidity sensors. Polyimide humidity sensors with MWCNT electrodes exhibited about 6 times faster response than equivalent Cr electrode sensors. This result may be due to their percolated pore structures, which make water molecules accessible to all polyimide surfaces. The much faster response times of MWCNT electrode sensors is attributed to the percolated pore network, which allows more water molecules to be accessible to polyimide surfaces.

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Experiences with Some Toxic and Relatively Accessible Heavy Metals on the Survival and Biomass Production of Amphora costata W. Smith

  • Mandal, Subir Kumar;Joshi, Vithaldas Hemantkumar;Bhatt, Devabratta Chandrashanker;Jha, Bhavanath;Ishimaru, Takashi
    • ALGAE
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    • v.21 no.4
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    • pp.471-477
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    • 2006
  • Amphora costata W. Smith 1853 is a down thrown diatom species and also known as metal corrosive ship-fouling organism. A. costata was isolated from Alang ship breaking yard, Alang and evaluated the toxicity tolerance and growth responses of the cultures exposed to different doses of toxic and relatively accessible heavy metals, such as Fe, Mn, Cd, Co, Cu, Zn, Ni, and Pb in the constantly monitored laboratory culture conditions. The strongest toxic effect was observed on A. costata exposed to Cd even at relatively low concentrations as compared to other metals. The following trend of decreasing order of toxicity i.e. Cd>Zn>Ni>Co>Pb>Cu>Fe was observed, when they were exposed to equal concentration and expose time.

Critical Discourse of Postmodern Aesthetics in Contemporary Furniture (II) - The Characteristics of New Design Furniture in terms of the Postmodern Aesthetics of Communication

  • Moon, Sun-Ok;Vesta A. H. Daniel
    • Journal of the Korea Furniture Society
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    • v.12 no.1
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    • pp.113-124
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    • 2001
  • This study explored the characteristics of contemporary furniture called New Design furniture design in terms of aesthetics of communication in the postmodern era. Qualitative conceptural analysis as the principal methodology was used to explore the characteristics of New Design furniture, which is accessible to the broadest possible public. Thereby, the communicative elements of symbol, metaphor, narrative, animation, imagination, humor, and/or wit expressed in New Design furniture were analyzed according to the designers'concept and work. As a result the postmodern aesthetics of communication made New Design furniture accessible to the largest number of People through cultural considerations in New Design furniture as it influences designers 'concept and work. However, it showed problems of New Design furniture in connection with postmodern aesthetics affecting mass production. Therefore, the designers have begun rethinking, redefining, and redesigning their furniture aesthetically, functionally, economically, and ecologically.

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