• Journal of the Korea Institute of Military Science and Technology
• /
• v.20 no.5
• /
• pp.647-653
• /
• 2017

In this paper, we deal with the experimental verification of 1D virtual force field algorithm based reflexive local path planning on uneven and dusty environment. The existing obstacle detection method on uneven and dusty environment and 1D virtual force field based reflexive local path planning algorithm simply are introduced. Although the 1D virtual force field algorithm is verified by various simulations, additional efforts are needed to verify this algorithm in the real-world. The introduced methods are combined with each other, installed to real mobile platforms and verified by various real experiments.

• Journal of Radiation Industry
• /
• v.6 no.1
• /
• pp.41-47
• /
• 2012

A field tracer experiment using a radioisotope was conducted to analyze the transport and dispersion characteristics of pollutants in the coastal area near a Wolsung. A rod float including GPS was released to track the paths of radioisotope. NaI detector was installed to measure the released radioisotope from the boat, and measurements were performed with the real time. The measured tracer data by a field experiment can be used as the basic data for understanding the transport characteristics of pollutants and verifying numerical models near the offshore.

• Journal of Soil and Groundwater Environment
• /
• v.25 no.4
• /
• pp.48-57
• /
• 2020

The objective of this study was to investigate the feasibility of organic compost for reducing soil loss in 25% sloped farm land. For the study, laboratory and field experiment were performed. After nine weeks monitoring in pot test, hardness of the amended soil with organic compost (1%~3%, w/w) showed two times higher than the control soil. Furthermore, soil loss of that was decreased by 95% under rainfall simulation test. From the result of laboratory experiment, organic compost with 2% (w/w) was applied for field experimental plot. After six month from April to September, the amount of soil loss became 67% of the initial, and the growth of natural vegetation was not hampered. Therefore, organic compost can be used as amendment materials to reduce soil loss in sloped farmland.

• KIEAE Journal
• /
• v.11 no.1
• /
• pp.57-62
• /
• 2011

The study aims to analyze and evaluate the evaluation items and application methods of environment-friendly middle schools in Chungbuk area by case studies. For the study, the criteria and situations of environment-friendly schools are analyzed literally and three environment-friendly middle schools in Chungbuk area selected. The field surveys and faculty interviews are performed. As results, about 35 environment-friendly technologies are applied and 66 to 68 points are acquired in three selected schools. It is analyzed that the PV, natural interior materials, raining recycle system and sufficient green spaces are pointed out as main technologies. About 66% of respondents know the environment-friendly certification and use the environment facilities in classes. However, the unsuitable plants for interior green spaces, unskilled management of recycling facilities and the absent of student participate programs show up as main problems. Also, the active campaigns need to expand the environment-friendly school.

• Journal of Gifted/Talented Education
• /
• v.23 no.6
• /
• pp.881-898
• /
• 2013

The purpose of this study was to compare the difference of semantic network about sedimentary environment between science gifted students and non-gifted students through field trip. The fifteen high school science gifted students and non-gifted students were participated in the field trip for this study. The geological field trip was performed in Chaseokgang, which suitable learning place for sedimentary environments. Data included field trip observation and students' inquiry activity reports. The inquiry activity reports were analyzed using the semantic network analysis method. The results of this study were as follows: First, the semantic network of science gifted students was larger and complex structures than that of the non-gifted students. Second, science gifted students were interpreted that changes of sedimentary environment was connected with the sorting and the roundness. On the other hand, semantic network of non-gifted students were become fragmented because they were not interpreted sedimentary environment related to scientific concepts.

• KIEAE Journal
• /
• v.7 no.2
• /
• pp.31-37
• /
• 2007

Despite of many supportive research to the usefulness of slide evaluation on environment of outdoor lighting, study method of using slides have provoked many discussions of its manifestation of reality of field conditions. This study aims to compare the results of slide survey with that of field survey. Distant view and short range view of nightscape of Seoul were selected. Field measurement of luminance and chromaticity were conducted and questionnaire survey were conducted. Frequency analysis, T-test, factor analysis were conducted. Results shows that distant view and short range view of field survey have better visual atmosphere than slide survey. In addition, slide survey on distant view shows lowest values. Difference between field survey and slide survey on distant view is much bigger than the results of short range view.

• Journal of Korean Society for Atmospheric Environment
• /
• v.12 no.3
• /
• pp.243-254
• /
• 1996

The main purpose of this study is to investigate the collection efficiency characteristics of a cylindrical ESP. To do that, it is necessary to analyze the electric field, gas flow field, and mechanism of particle movement by numerical simulation based on EHD model. For a gas flow field, Navier-Stokes equation involving the electric source term was solved by SIMPLE algorithm. In case of the electric field, the current continuity and electric field equations were solved by S.O.R. method. The analysis of particle movement was performed on the basis of PSI-CELL model from the Lagrangian viewpoint. The results showed that the influence on the gas flow field by the electric field is almost negligible in a cylindrical ESP. The particle drift velocity $V_P$ toward the collection surface is increased continuously by the electrostatic force due to the rise of particle charge as the particle is moving to the flow direction and the particle size becomes larger. The collection efficiency is to quitely higher with the increase of applied voltage for the same particle size, while becomes smaller as the inlet velocity is increased.

• Hwankyungkyoyuk
• /
• v.8 no.1
• /
• pp.138-150
• /
• 1995

The quality of environmental education in school depends on the quality of environment teacher, who develops his/her ability through avalible courses such as in-service training and communication et al. This study was performed with the questionnaire to 179 teachers who participated in certificate in-service training for [Environment] subjects on winter of '95 and summer of '96. The questionnaire included 28 items, which could be categorized 5 parts : the environmental consciousness of teachers, their awareness of environmental education in schools, the reason of participation, the limits and requirements of learning field, avalible teaching and learning methods. The improvements and suggestions derived from this study are summarized as follows: First, it is necessary to differentiate in-service training concerning environment, because the motive of teacher's participation is diverse and is not always suitable to the purpose of certificate in-service training for [Environment] subjects. Second, the teaching contents and programs of certificate in-service training for [Environment] subjects have to be various according to the characteristics and major subjects of teachers. Third, it deserves special emphasis that the field trips and survey for the experiential study in field is supplemented in the teaching contents and programs of certificate in-service training for [Environment] subjects. Also, it is necessary to strengthen the environmental ethics and philosophy in the teaching contents and programs.

• KIEAE Journal
• /
• v.5 no.1
• /
• pp.43-49
• /
• 2005

People grow up and build up most of their character through living in dwelling space and have relax and refresh at home. Creating healthy dwelling space is being considered very important in architectural planning and design for providing comfortable living environment and improving quality of life. One of the properties of the earth is that the earth has a magnetic field associated with it- the Geomagnetic field. The geomagnetic field is produced by a combination of crustal rocks, external electric current systems that surround the earth that surround the earth and currents induced in the outer layers of the earth by magnetic field variations. Human beings have evolved with the background of magnetic field, they are accustomed to living in its presence. Geopathic stress occurs at geopathic zones where the geomagnetic field is disturbed. Geopathic zones exhibit magnetic charges. Geopathic zones are characterized by variations in geomagnetism, for the geomagnetic field is not uniform but exhibits many highly localized distortions, some random, some fairly regular. These occur in geological faults, caves and underground water channel. Many research papers and experiments of the western countries indicates that the geomagnetic field affects the people and living organism in dwellings. Therefore, it is necessary to investigate the geomagnetic field and people's response in living space. In this study the Health Hazard of geomagneic field in dwelling are studied through literature survey of related science field.

• The Bulletin of The Korean Astronomical Society
• /
• v.42 no.1
• /
• pp.27.1-27.1
• /
• 2017

There is a rich diversity of galaxy properties and we are starting to understand some of the drivers for differences between galaxies. Much progress has been has been made in the last decade, thanks in large part to massively multiplexed surveys using single fibres, but we still lack a complete picture of how galaxies are built. I will discuss how large-scale integral field surveys can address a number of the outstanding questions in the field, starting with the current SAMI Galaxy Survey, and then looking towards the Hector instrument that will carry out integral field surveys of order 50,000-100,000 galaxies. With SAMI we can start to address how mass and environment influence galaxy structure and history, and I will discuss examples such as the environmental quenching of star formation and the distribution of angular momentum. With larger samples afforded by Hector we can go beyond simply mass and environment, to separate galaxies based on their merger or accretion history, as well as their larger-scale environment.