• Title/Summary/Keyword: compatibility

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Study on Compatibility Analysis between Radio Services (무선통신 업무간 양립성 분석에 관한 연구)

  • Kang, Jeong-Yong;Kim, Jin-Young;Kim, Eun-Cheol;Kim, Jong-Heon;Ryu, Chung-Sang;Oh, Seong-Taek
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.6 no.3
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    • pp.122-137
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    • 2007
  • In this paper, compatibility between different radio services or systems is analyzed when they are in adjacent band or co-channel. The first step of the compatibility analysis is establishing an interference scenario. And an interference pobability from an interfering transmitter to a victim receiver is calculated by means of Monte-Carlo simulation techniques. Then the calculated result is compared with the predefined interference criteria, maximum permissible interference probability and we can determine compatibility in accordance with the active interferer density, channel bandwidth, cell radius, distance between interfering transmitter and victim receiver, and duty cycle. It is assumed that Propagation modes are the free space model and extened Hata model.

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The Compatibility of Slurry Wall Materials with Leachate for Cut -off of Contaminated Sites (오염지역 차폐용 슬러리월 재료와 침출수의 반응 특성)

  • 이용수;정하익
    • Geotechnical Engineering
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    • v.13 no.2
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    • pp.9-16
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    • 1997
  • Cut-off methods of controlling leachate migration from waste landfills and contaminated sites are studied. Permeability and chemical compatibility tests are prrforlned on slurry wall materials including soil-bentonite, cement-bentonite, cement / fly ash-bentonite, plastic concrete. Hydraulic conductivity of soil-bentonite mixture is the lowest of these four bacuill materials. The leachate from municipal solid waste has little influence on the permeability of the backfill materials. The bentonite slurry becomes flocculated and aggregated when exposed to the leachate. The results of the permeability test showed that the hydraulic conductivities of the backfill materials are in the order soil-beiltonite, Plastic concrete, cement-bentonite. And the result c: the compatibility test showed increase in permeability due to the effects of leachate. Thus, in designing the slurry wall it is essential to check the behaviour of the bentonite slurry and backfill materials on the compatibility with the contaminants.

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Small Scale Map Projection and Coordinate System Improvement in Consideration of Usability and Compatibility

  • Choi, Byoung Gil;Na, Young Woo;Jung, Jin Woo
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.34 no.2
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    • pp.171-183
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    • 2016
  • Small-scale maps currently used are made by scanning and editing printed maps and its shortcoming is accumulated errors at the time of editing and low accuracy. TM projection method is used but its accuracy varies. In addition, small-scale maps are made without consideration of usability and compatibility with other scale maps. Therefore, it is necessary to suggest projection and coordinates system improvement methods in consideration of usability and compatibility between data. The results of this study reveal that in order to make the optimum small-scale map, projection that fits the purpose of map usage in each scale, coordinate system and neat line composition should be selected in consideration of interrelation and compatibility with other maps. Conic projection should be used to accurately illustrate the entire country, but considering usability and compatibility with other maps, traversing cylindrical projection should be used instead of conic projection. For coordinates system of the small-scale map, Universal Transverse Mercator (UTM-K) based on the World Geodetic System should be used instead of conventional longitude and latitude coordinate system or Transverse Mercator.

DLNA Protocol Inspection Tool for Compatibility Analysis

  • Park, Se-Ho;Park, Yong-Suk;Seo, Jeong-Wook;Choi, Jun-Rim
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.8 no.6
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    • pp.2104-2117
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    • 2014
  • The propagation of smart devices and the rapid expansion of wireless mobile networks have increased the need for ubiquitous device connectivity and contents access. DLNA is currently being used as the de facto standard for connectivity of consumer devices in the digital home. The guidelines provided by DLNA are intended to facilitate device and contents discovery, management, sharing and distribution. However, consumer experience with DLNA has been rather poor and usability not up to speed. Different problems and issues in limited compatibility have been reported due to manufacturer customizations. Such compatibility issues are often difficult to identify by average consumers who are not savvy in information communications and multimedia technology. In this paper, the design and implementation of a DLNA protocol inspection tool is presented for compatibility analysis among DLNA certified devices. The tool monitors the home network and performs analysis of the underlying protocols used by DLNA. The tool can be used for diagnostics and troubleshooting, enabling the user to identify compatibility issues between devices or problems in the network.

EXPERIMENTAL EVALUATION OF USED CARS FOR FRONTAL COLLISION COMPATIBILITY

  • Lim, J.H.;Park, I.S.;Heo, S.J.
    • International Journal of Automotive Technology
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    • v.7 no.6
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    • pp.715-720
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    • 2006
  • This research investigates injury values and vehicle deformation for vehicle frontal crash compatibility. To investigate compatibility in an individual case, it is possible to impact two vehicles and evaluate the injury values and deformations in both vehicles. In this study, four tests were conducted to evaluate compatibility. A large and mini vehicle were subjected to a frontal car-to-car crash test at a speed of 48.3 km/h with an offset of 40%. An inclination car-to-car crash test using the large and small vehicle were conducted at 30 km/h at a $30^{\circ}$ angle. The results of the 48.3 km/h, car-to-car frontal crash revealed extremely high injury values on the chest and upper leg of the Hybrid III 50% driver dummy with seatbelt in the mini vehicle compared to the large vehicle. For the 30 km/h, car-to-car inclination crash, however, injury values in the small vehicle were 1.5 times higher compared to the large vehicle.

Predicting Online Learning Adoption: The Role of Compatibility, Self-Efficacy, Knowledge Sharing, and Knowledge Acquisition

  • Mshali, Haider;Al-Azawei, Ahmed
    • Journal of Information Science Theory and Practice
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    • v.10 no.3
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    • pp.24-39
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    • 2022
  • Online learning is becoming ubiquitous worldwide because of its accessibility anytime and from anywhere. However, it cannot be successfully implemented without understanding constructs that may affect its adoption. Unlike previous literature, this research extends the Unified Theory of Acceptance and Use of Technology with three well-known theories, namely compatibility, online self-efficacy, and knowledge sharing and acquisition to examine online learning adoption. A total of 264 higher education students took part in this research. Partial Least Squares-Structural Equation Modeling was used to evaluate the proposed theoretical model. The findings suggested that performance expectancy and compatibility were significant predictors of behavioral intention, whereas behavioral intention, facilitating conditions, and compatibility had a significant and direct effect on online learning's actual use. The results also showed that knowledge acquisition, knowledge sharing, and online self-efficacy were determinates of performance expectancy. Finally, online self-efficacy was a predictor of effort expectancy. The proposed model achieved a high fit and explained 47.7%, 75.1%, 76.1%, and 71.8% of the variance of effort expectancy, performance expectancy, behavioral intention, and online learning actual use, respectively. This study has many theoretical and practical implications that have been discussed for further research.

Trends in Electromagnetic Compatibility (EMC) Technology to Secure Electromagnetic Safety in the Critical Facilities (주요시설의 전자파 안전성 확보를 위한 전자파적합성(EMC) 기술)

  • Kwon, J.H.
    • Electronics and Telecommunications Trends
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    • v.33 no.3
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    • pp.41-50
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    • 2018
  • In order to ensure the electromagnetic safety of a complex facility equipped with a variety of electric and electronic equipment, the European Union (EU) has enacted and applied the Electromagnetic Compatibility Directive (EMC Directive 2004/108/EC) to a fixed installation. This paper introduces the regulations and techniques related with electromagnetic compatibility (EMC) engineering applied to a fixed installation, which is used to prevent a malfunction of critical equipment and systems caused by unwanted electromagnetic waves and to operate the facilities with stability.

COMPATIBILITY IN CERTAIN QUASIGROUP HOMOGENEOUS SPACE

  • Im, Bokhee;Ryu, Ji-Young
    • Bulletin of the Korean Mathematical Society
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    • v.50 no.2
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    • pp.667-674
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    • 2013
  • Considering a special double-cover Q of the symmetric group of degree 3, we show that a proper non-regular approximate symmetry occurs from its quasigroup homogeneous space. The weak compatibility of any two elements of Q is completely characterized in any such quasigroup homogeneous space of degree 4.

RF COMPATIBILITY TEST BETWEEN KOMPSAT AND TTC STATION

  • Ahn, Sang-Il;Choi, Hae-Jin
    • Journal of Astronomy and Space Sciences
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    • v.16 no.2
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    • pp.191-198
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    • 1999
  • Results of RF compatibility test between KOMPSAT(Korea Multi-Purpose SATellite) and TTC(Tracking, Telemetry, and Command) station are described. S/C(Spacecreft) RF Test, telemetry test, command test, ranging test, and tracking receiver test were performed with respect to pass/fail criteria. To provide physical RF interface between KOMPSAT and TTC equipment, direct low cable and antenna-to-antenna interface were implemented. Through RF compatibility test, it was fully demonstrated that KOMPSAT and TTC equipment are functionally workable.

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Study for electromagnetic compatibility of electric train system (전기철도의 전자기적합성에 관한 고찰)

  • Kim Min-Cheol;Lee Jang-Mu;Han Moon-Soeb
    • Proceedings of the KSR Conference
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    • 2005.05a
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    • pp.883-888
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    • 2005
  • In modern system, electromagnetic environment are going worse with advancing electric and electronic technology, and this electromagnetic environment affect modern electric train system at the point of the safety problem. Therefore, each distributed system that is consisting electric train system have to prove there own electromagnetic compatibility through the field test. These distributed system can be considered as power supply system, signal & communication system and train system. In this study, essential field tests for electromagnetic compatibility of train system based on IEC national standard are suggested.

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