• Journal of Korean Society of Forest Science
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• v.34 no.1
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• pp.73-85
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• 1977

The nutrient elements which are used in forest fertilization vary from country to country. The development of forest fertilization is influenced by different national interests and/or economic situtations. The fertilized area/year of each country is shown. As one can see, Korea will have one of the largest fertilized forest area in the world. Nevertheless, attention needs to be paid from the technical viewpoint, since the development has been very rapid. The fertilization techniques, kinds of nutrient element, amounts of dosage, types of fertilizers, estimation of their efficiency, leaf analysis, ecological or physiological aspects of forest fertilization, tree species, wood qualities, forest vegetation, damages such as deseases, insects, frost, wind and snow, are discussed in relation to forest fertilization. Finally, the problem of eutrophication of water is discussed. The technical assessment will become necessary in introducing new techniques into the field.

• Journal of Korea Foundry Society
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• v.42 no.6
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• pp.387-391
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• 2022

• Korean Architects
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• s.629
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• pp.16-19
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• 2021

외산 캐드가 대다수를 차지하는 국내 캐드 시장에서 고군분투하고 있는 국산 캐드 제품이 있다. 기술독립의 가치와 국내 기술의 세계 표준화를 목표로 삼고 있는 마이다스아이티의 MidasCAD(마이다스캐드)는 건축사를 위한 'ArchDesign(아키디자인)' 제품을 출시하고, 사용자와의 소통을 통해 제품을 보완하며 국내 시장을 공략하고 있다. 아울러 9월 중에는 '마이다스캐드 2022' 버전이 출시 예정이다. 지난 8월 24일, 김기봉 마이다스아이티 국내사업그룹장을 직접 만나 마이다스캐드의 개발 방향, 마케팅 전략과 목표 등에 관한 이야기를 들어보았다.

• Korean Architects
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• s.620
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• pp.16-19
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• 2020

최근 서울시가 쪽방촌 주거환경 업그레이드를 위한 표준 평면을 전국 최초로 발표하고, 이를 쪽방 정비사업 공공주택 가이드라인으로 활용한다고 밝혔다. 발표된 표준평면 유형은 '주거기본법'에 따른 최저주거기준인 14제곱미터 이상으로, 1인가구를 기본으로 거주자 특성에 따라 크게 세 가지로 구분된다. 이번 일로 국내 공공복지 건축이 한 발 더 도약했다는 평이 주를 이룬다. 지난 11월 27일 표준 평면을 개발한 한영근 건축사(주.아키폴리건축사사무소 대표_프랑스 국가공인 건축사/대통령소속 국가건축정책위원회 위원)를 만나서, 관련 내용과 더불어 공공복지 건축 및 건축사의 사회적 역할에 관한 그의 생각을 들어봤다.

• Journal of Korea Foundry Society
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• v.43 no.5
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• pp.256-259
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• 2023

• Journal of Korea Society of Industrial Information Systems
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• v.16 no.5
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• pp.185-196
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• 2011

In order to draw some strategic implications for the sustainable growth of emerging technologies this paper attempts to dynamics underlying the 'hype cycle' ever occurring in course of coevolution of technology and society. Particularly, a series of basic questions in the context of sustainability are explored to answer by simulating the hype system structure: What makes hype cycle occur? how to enhance the tapering level at the final stage of coevolution? what are the key policy leverages and when is the right time for the policy intervention? This study perhaps give some insights not necessarily to the academics but also to the practitioners and policy makers.

• Journal of the Korea Computer Industry Society
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• v.4 no.4
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• pp.479-490
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• 2003

CBD is a software development approach based on reusable component and supports easy modification and evolution of software. For the success of this approach, a component must be developed with high cohesion and low coupling. In this paper, we propose the two types of clustering analysis technique based on affinity between use-cases and classes and propose component identification method applying to this technique. We also propose component reference model and CBD methodology framework and perform a ease study to demonstrate how the affinity-based clustering technique is used in component identification method. Component identification method contains three tasks such as component extraction, component specification and component architecting. This method uses object-oriented concept for identifying component, which improves traceability from analysis to implementation and can automatically extract component. This method reflects the low coupling-high cohesion principle for good modularization about reusable component.

• Journal of the Korean housing association
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• v.24 no.1
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• pp.51-59
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• 2013

This study aims to improve the thermal comfort level of detached housing area by reducing the impact of thermal environment. The study focused on reducing surface temperature that is generated in buildings and adjacent spaces as a result of sensible heat load and presented a proposal on implementing planting method considering its outdoor condition and structure and composed materials. To perform the study, we utilized 3D-CAD to examine the outdoor condition and structure and composed materials that impact on surface temperature and conducted space design after reflecting climatic elements in simulations. The result is as follows. In reviewing temperature distribution of Heat Island Potential (HIP) of buildings and adjacent spaces, in case where green coverage ratio is increased, there was a $6^{\circ}C$ temperature difference and in regard to changes in the thermal environment in detached housing area, in case where rooftop planting, surface improvement, planting, and overall green coverage ratio is increased, there was a $10^{\circ}C$ temperature difference. In addition, there was difference in temperature in detached housing area following the changes in wind.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.53 no.4
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• pp.637-649
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• 2020

An ideal 3D primitive equation model is implemented to investigate upper ocean response to typhoons, focusing on rightward bias (RWB) which means an appearance of an intensified sea surface cooling to the right side of the typhoon track. The model has 26-stratified levels and a flat bottom (1000 m), covering a rectangular domain of about 3,060 km×3,300 km with four open boundaries. The sea water is forced by an atmospheric pressure and a gradient wind of the typhoon. The model well reproduces the RWB in previous observations and theoretical analyses. For the fast moving typhoon (FMT) (-8m/sec), the model shows that in the mixed layer (ML), the RWB in the SST noticeably appears clearly illustrating the coupling between inertial motion and wind stress, but in the subsurface layer (-100m), the RWB does not emerge since a cyclonic current field (CCF) caused by wind stress curl is primarily dominant. For the slowly moving typhoon (SMT) (-3m/sec), however, the RWB does not emerge because the coupling is weakened and the CCF is rather predominant even in the ML. In the model, we conclude that the RWB noticeably emerges in the FMT but does not emerge in the SMT related to predominance of CCF.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.51 no.1
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• pp.107-112
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• 2018

One-dimensional numerical model is implemented to investigate temperature variations in the mixed layer depth (MLD) with the passage of typhoons. In the model, we assume a non-divergent, infinite ocean and consider wind effects only, excluding isostatic effects (inverse barometric effects) and upwelling with vertical movement of the water column. Numerical experiments investigate the effects of typhoon tracks on temperature variations, including their dependence on vertical resolutions in the MLD and these results are compared with those in a three-dimensional primitive equation model (POM). The model reproduces features of the observed temperature variations in the MLD fairly well, and implies that wind effects, rather than isostatic effects, play a predominant role in temporal and spatial temperature variations in the MLD. After the passage of typhoons, however, the model does not reproduce well the temperature variations observed in the MLD, because a limitation of the model is its inability to reproduce events such as cyclonic eddy formation (Hong et al., 2011; Masuda and Hong, 2011). The model also shows well the so called 'rightward bias' (Price, 1981) of sea surface cooling which is the most predominant in the right hand side of typhoon's track.