• Journal of The Korean Society of Agricultural Engineers
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• v.52 no.1
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• pp.33-40
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• 2010

The cemented sand and gravel (CSG) method is a construction technique that adds cement and water to rock-like materials, such as rivered gravel or excavation muck which that can be obtained easily at areas adjacent to dam sites. This study was performed to evaluate the planting properties of herbaceous plant and cool-season grass in CSG blocks that were manufactured by using CSG materials to develop environmentally friendly CSG method. The two types of CSG-0 without cement and CSG-100 with $100\;kg/m^3$ of cement were designed to evaluate compaction, unconfined compressive strength and growth of plants with cement content by using modified E compaction. To analyze growth properties of plants, germination ratio, visual cover, plant height and root length were measured in 4 weeks and 8 weeks after sowing. As the results, the germination regardless kinds of plants started within 5~7days and the germination ratio were in the range of 50~60 %. The visual cover of kinds of plants by visual rating system were in the range of 7~8 and the visual cover of tall fescue and perennial ryegrass was higher than that of lespedeza cuneata. The plant height and root length for tall fescue and perennial ryegrass in 8 weeks after sowing were in the range of 22~26 cm, 12~15 cm and 4~6 cm, 3~5 cm, respectively.

• Composites Research
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• v.36 no.6
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• pp.448-453
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• 2023

This paper explores developing sustainable 3D printing filaments using organic soybean hulls mixed with polylactic acid (PLA). The study experiments with various particle sizes and mixing ratios, examining the physical and mechanical properties of the resulting filaments. Results show that smaller soybean hull particles and specific mixing ratios enhance the filament's quality while maintaining PLA's characteristics. This research signifies a step towards environmentally friendly 3D printing materials, offering a viable alternative to conventional filaments and addressing ecological concerns in the industry.

• Korean Journal of Agricultural Science
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• v.38 no.3
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• pp.413-419
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• 2011

Recently, the rate of cultivation of such as hairy vetch was increased as a way of reducing the current soil problem. However, the occurrence of insect pest such as bean bugs, Riptortus pedestris, were increased in the field of green manure crops and their injuries to hairy vetch were observed. While minimizing insecticide use for the environmental friendly agriculture, the control of the bean bug can be utilized environmental friendly agricultural materials (EFAMs) in the green manure crop fields. The control effects of some EFAMs and most of chemical insecticides to the bean bug were significantly high. As a result of direct spray of EFAM that contained sophora extract or neem extract, the control effects of six EFAMs were higher than 70% at 120 hours after treatments. Among them, three EFAMs were showed over 90% of control effects. On the other hand, most of chemical insecticides were showed 100% of control effect against the bean bug at 48 hours after treatment. As mortality effects of EFAMs were sloely observed until 120h after treatment, we must use selected EFAMs at the beginnibgs of occurrence and entrance in the field of green manure for effective control of bean bugs.

• Korean Institute of Interior Design Journal
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• no.22
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• pp.23-29
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• 2000

As the environmental paradigm is the major issue today, the guideline of the ecological design in the interior architectural field is needed. One on the knowledge necessary to plan the ecological interior architecture as a designer is the spectification related factors for planning, which should be applied in materialistic matters. In this paper, the knowledge of materials and products needed to design interior space considering the ecological factors is studied. And, a guideline for the eco-design is investigated for the expression of the environmentally friendly perception.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.200-204
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• 2004

It is social demands that we are now wanting to be more cozier and clean by the enhancement of the living standard recently. Antimicrobial is essential to the interior materials to prevent bacteria from spreading through passenger using the electric railway called environmentally friendly. In this paper, ion exchanged zeolite was added to the unsaturated polyester resin reinforced glass fiber. To investigate the animicrobial performance. Staphylococcus aureus and Escherichia coli was used according to the FC TM-20-2003 method.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.5 no.5
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• pp.67-75
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• 2002

This study was carried out to introduce current status to discuss erosion control strategy for the conservation of stream valley ecosystem. To restore stream valley ecosystem, we should establish restoration plans to keep the original shape of stream. It is necessary to use environmentally sound materials with conservation of valley stability. Valley construction for erosion control works should be evaluated continuously based on concepts of conservation and development of stream valley ecology. It is categorized in point of the important of class of stream valley conservation ahead planning and constructure. We suggest that the development of stream valley construction needs to prevent mass movement of soil sediments. In addition, it is established the basal strategy to protect macro and micro aquatic organisms in stream valley ecosystem.

• Journal of the Korean Ceramic Society
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• v.54 no.1
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• pp.1-8
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• 2017

Electrochemical water splitting to produce hydrogen energy is regarded as a promising energy conversion process for its environmentally friendly nature. To improve cell efficiency, the development of efficient water oxidation catalysts is essentially demanded. For several decades, 3d transition metal oxides have been intensively investigated for their high activity, good durability and low-cost. This review covers i) recent progress on 3d transition metal oxide electrocatalysts and ii) the reaction mechanism of oxygen evolving catalysis, specifically focused on the proposed pathways for the O-O bond formation step.

• Journal of the Society of Disaster Information
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• v.15 no.2
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• pp.206-213
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• 2019

Purpose: This study aims to develop eco - friendly paving materials using Sawdust and EPDM chips. Method: Materials are eco-friendly materials and have no environmental problems. By using EPDM chip, the walking feeling can be increased. Results: In this study, the optimum mixing ratio was calculated through mixing design test. Based on the blending ratio, the surface layer of the sidewalk is made of fine sawdust and EPDM chips. We used only sawdust of grain - 107 -size to make the base layer of the sidewalks and the surface layer of the bicycle road with the permeability and the anti - resilience, and suggested the application method through the test construction. Conclusion: This study the expected that the recent efforts of the government to reduce the elastic paving material, which is the environmentally harmful problem with the complete eco-friendly paving material, are expected to revive.

• KIEAE Journal
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• v.8 no.6
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• pp.79-87
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• 2008

The purpose of this study is to identify the planning features of apartments that are people-friendly, nature-friendly and ones that improve the quality of the apartments through sustainable design characteristics found in the apartment community space. This study found the sustainable design characteristics through the case of 8 environment-friendly apartment in the Seoul-Gyeunggi area. Sustainable design was categorized into three areas a) social sustainability b) economic sustainability c) ecological sustainability. The major findings are summarized as follows: First, socially sustainable design which included plans for various types of squares, spaces for pedestrians showed high application of universal design plans. While, plans to maximize open spaces that facilitate the social exchanges among residents showed low application. Second, economically sustainable design showed high application in terms of access to public transportation and bicycle storage facilities. However, planning factors such as alternative energy facilities, recyclable materials, reuse of rainwaterand heavy water showed low application. Third, environmentally sustainable design included high application of promenades, artificially created green space and various types of water space. On the other hand, nature study centers, biotope and environment friendly parking space showed low application.

• Fashion & Textile Research Journal
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• v.12 no.2
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• pp.149-155
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• 2010

The advanced and complicated modern society recognizes image creation based on the identity of the global competitive age as the important means. The requirement for a new vision to the globally environmental problem has affected on design so that as environmentally-friendly products and technologies have been developed and original expression modes have been appeared which the medium of paper which is natural material, paper has been highlighted newly. Hanji made of mulberry fiber, a bast fiber of mulberry is a representative environment-friendly natural fiber. In addition, it has various functions similar to those of yellow earth such as emission of far infrared rays, antibiosis, deodorization, fast dry ability of sweat, and simple dyeing ability. It is Hanji threads that are produced from various processes of Hanji materials. Therefore, hanji threads are able to be both woven and knitted still remaining Hanji's excellent characteristics. In addition, it is light, bio-degradable, durable and washable, and it is an environment friendly product with the distinguished texture and sensitivity. Under the concept of 'Circle' designed the uniforms of music hall to inform that the uniforms as a media representing music hall represents the unique Sori Arts Center of Jeollabuk-do traditional style.