• KIPS Transactions on Computer and Communication Systems
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• v.3 no.4
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• pp.125-128
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• 2014

OpenGL ES(OpenGL for Embedded System) 2.0 is one of the most widely used 3D graphics API(application progrma interface) standard for smart phones and tablet PCs at this time. During programming with this API, they prefer desktop environment rather than the target mobile environment, which has relatively low computing power. Thus, we need to emulate the OpenGL ES 2.0 API on the desktop PCs, where only OpenGL API libraries are available. In this paper, we present technical difficulties and their solutions to emulate OpenGL ES 2.0 on desktop PCs. Our final implementation of OpenGL ES 2.0 emulation library works on desktop PCs and passed over more than 96% of the official CTS(conformance test suites) to prove the correctness of our implementation. Additionally, for the commercially available benchmark programs, our implementation shows equivalent execution speeds to the previous commercial OpenGL ES 2.0 implementations.

• Journal of the Korean Institute of Educational Facilities
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• v.5 no.2
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• pp.49-56
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• 1998

This study aims to estimate the educational environment associated with various learning activities and to compare the differences of each characteristics appeared on the interviews and questions of teachers performing open education. The results were shown to the 5 groups differed from each other by the awareness analysis on their educational environment. According to the analyzed results, firstly, team teaching. applied living factor, unit learning factor, managemental factor, general public factor and assisting managemental factor were influential successively on the degree of satisfaction of teachers to the educational environment in open education of elementary schools. Secondly, to compare the relative differences between the groups, GLM was done. Most factors were significant only in the group of attached school and showed a partial significance in the grade in charge, gender and age.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2001.11a
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• pp.15-24
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• 2001

Upon entering the 21st Century, One of the new paradigm of Housing industry in Korea is to accomplish the foundation of Sustainable Building & Environment. It is easy to understand that Building environment in Korea is appearing the phenomenon of rapid conversion from supply-oriented market to demand-oriented market. Thus, the purpose of this paper is to suggest the direction of a new housing development with "Open Housing"as New Housing System which takes into account durability of housing based on the changeability among Housing-Components, the flexibility of interior space, the remodeling & repairing of housing and the user′s needs with variable life-style. This paper also shows the example of Infill-Systems for the Open housing in Korea on the basis of housing situation, experiences for the Open Housing including assembly technique of Infill-Systems.

• Journal of the Korean Institute of Educational Facilities
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• v.1 no.2
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• pp.21-31
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• 1994

Open education has been established for 10 years in Korea. In spite of relatively long history of open education, there are only two schools which have well structured open space to support open education. Development of open curriculm and open space is a vital elements for the success of open education. This study aims at introducing the concept and development of open space and analyze the role of media center to improve open education. Especially emphasis is placed on how the open space should be organized for the effective open education. The open space should include 4 areas such as instructional area, production area, storage area and teachers' area. There are, however, no standardized format for the open space and education. Open space should be flexibly restructured to adapt to rapidly changing educational environment.

• Journal of the Korean housing association
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• v.21 no.3
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• pp.95-104
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• 2010

The purpose of this study was to found that the important design reform points for improvement of the public open space quality. For this purpose, surveyed the users of the public open space and the experts working for the public open space planning for the design elements of the public open spaces in terms of importance and satisfaction. The scope of the study was limited to Mapo-gu, Seoul and the buildings constructed since 1992 were sampled. the data collected were subject to Importance-Performance Analysis. As a result, 'waste boxes, vending machines and other amenities', 'characteristic floor and pedestrian environment', 'designs and their layout in harmony with the surrounding and landscape facilities', 'facilities checking and patrol for safety' and 'entire area of the public open space'. Based on the above findings, the following reform measures are put forwards for improvement of the public open space quality; First, the public open spaces should be equipped with sufficient amenities. Second, it is necessary to check the facilities regularly, while enhancing the safety through patrols. Third, it is essential to reflect user's needs in public open space planning, while applying the important design elements to the public facilities. Fourth, in order to create a comfortable pedestrian environment within the public open space, it is deemed necessary to divide the space into the passages for passers-by and the recesses for uses. Fifth, it is necessary to amend the Building Code to the effects that the radio of the landscaped area to the entire area can be readjusted together with the night lighting facilities. Sixth, it is desirable to give the weights to the important design elements for the public open spaces, so that the quality public open spaces can benefit from the incentives. In addition, regular maintenance and management should be ensured by policies.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.3
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• pp.397-404
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• 2020

In this paper, the propagating-wave attenuation characteristics at 1, 3, and 6 GHz in the open environment roadway where the ground-reflected wave dominates are analyzed through a propagation model simulation using a ray-tracing method and propagation measurements. Simulations has been performed by varying the ground material, the transmitting antenna height, and the receiving antenna height. The measurements were conducted using a directional transmission antenna installed at 10 m mast and a omnidirectional receiving antenna installed at 1.5 m mast in an open environment. Comparison of simulation and measurement results confirms that the null points having the weak signal strength depend on those parameters. Although this research has been investigated for the wide road, the derived result could be useful for installing the transmitter and receiver in the roadway open environment.

• Journal of KIISE:Computing Practices and Letters
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• v.8 no.5
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• pp.510-519
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• 2002

The OpenGIS Consortium has proposed a new web-mapping technology to support interoperability in web GIS environment by developing the specifications of MapServer and GML. In this environment, the MapServer transforms legacy spatial data into GML data, and clients display them on standard web browsers. This web-mapping testbed proposes methods for discovering, accessing, integrating and displaying GIS information except processing of spatial operations which are essential services in GIS environment. This paper proposes the method for executing spatial operations on GML data which are overlays of different map layers in legacy data servers. To support spatial operations on GML data in web GIS environment, this paper designs and implements GDOM based on the W3C's DOM Specifications and OGC's Simple Features Specifications. This paper shows the specifications and implementation of GDOM and the process of spatial operations in web-mapping testbed environment.

• Journal of the Korean Institute of Educational Facilities
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• v.11 no.1
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• pp.5-14
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• 2004

Since 1990s in Korea, elementary school classrooms have been designed toward open education system in pursuit of variety of educational purpose. Also, the architectural designs of schools have been acomplished for individual school not based on the standard design code. The present paper aims to investigate the acoustic environment of existing classrooms and to compare the sound insulation capacity between the ordinary classrooms and the newly built classrooms for open education. The current acoustical situation of elementary classrooms was analyzed using field measurements and questionnaire survey. In order to this, Three elementary schools were selected which were built in 1978, 1996 and 2000 respectively. Room acoustical parameters including Reverberation time(RT), Definition(D50), Speech Intelligibility(RASTI), Transmission loss(TL) and STC were measured in a classroom in each elementary school classroom. Each measurement was undertaken with the windows and doors being open or closed. As the result, it was found that the transmission loss between rooms in open classrooms is, $5{\sim}6dB$ in average, inferior than the ordinary classrooms. The RASTI of 0.70 was measured in newly built classrooms which is better than old classrooms(0.70) and open classrooms(0.73). This was shown as same in the speech definition measurements. This results from the condition of sealing and airtightness of classrooms and floor materials. The results denote that open classrooms have poor acoustic condition in sound insulation and speech intelligibility.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.91.3-91
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• 2001

A sensor fusion scheme for mobile robot environment recognition that incorporates range data and contour data is proposed. Ultrasonic sensor provides coarse spatial description but guarantees open space with no obstacle within sonic cone with relatively high belief. Laser structured light system provides detailed contour description of environment but prone to light noise and is easily affected by surface reflectivity. Overall fusion process is composed of two stages: Noise elimination and belief updates. Dempster Shafer´s evidential reasoning is applied at each stage. Open space estimation from sonar range measurements brings elimination of noisy lines from laser sensor. Comparing actual sonar data to the simulated sonar data enables ...

• Smart Media Journal
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• v.6 no.3
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• pp.75-82
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• 2017

Recently, the marine monitoring technology is actively being studied since the sea is a rich repository of natural resources that is taken notice in the world. In particular, the marine environment data should be collected continuously in order to understand and analyze the marine environment, however the study of automatic monitoring of marine environment in Korea is not enough. In this paper, we proposed the marine environment monitoring system based on open source. The proposed system can be designed as a scale out system using Hadoop based time series database which it can easily process the increasing collection data by a scale out computer resources. It can also be used to analyze marine data by visualizing collected data.