• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.93-98
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• 2008

Haeundae Doosan We've The Zenith project is adjacent to Suyoung-bay, now it is in the process of excavation and foundation work. The main use of the tower is residence which height is 300m and 80 floor, the highest residential reinforced concrete building through the Orient. It is comprised of 3 high- rised buildings and 1 low-rised building, the basement is 230m wide and 200m length sized mass structure. The lateral resistance system is acted effectively against the lateral load and satisfactorily against the wind vibration by the 4 direction extension of the center core wall($700{\sim}800mm$ thickness) and reinforced concrete column set around the slab. Flat-plate slab system(250mm thickness) is adjusted for the slab system and it enables effective work process and shortening the working term by minimizing the ceiling height and not needing to install perimeter beam and drop panel. The strength and serviceability of the structure is able to be monitored and estimated constantly through the health monitoring system during the construction and after the construction.

• Culinary science and hospitality research
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• v.22 no.7
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• pp.203-221
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• 2016

This study aims to analyze the impact of servicescape on the perceived values and brand attitude of coffee customers. In order to archive our research objects, current study employed SPSS 22.0 statistal program. The summary is as follows. First, it was revealed that the servicescape of coffee shops has a positive influence on perceived value. Second, the servicescape of coffee shop has a positive influence on brand attitude. And perceived value of the customer has a positive impact on customer brand attitude. Based on the results, this research has concluded some theoretical suggestions as follows. First, in case of brand coffee shop, it was analyzed that the attractions of interior design color, floor and wall interior, and structure has influenced on the differentiated values of customers. Also, the accessability shows that the brand coffee shops with parking facilities along with the convenience provided by the off-site facilities make customers highly recognize the brand values. In addition, the results found that the factor of service condition becomes a determining factor. Thus, current study will contribute to consider the various elements of service scape when new business develop as well as redesign the previous stores.

• Korean Journal of Construction Engineering and Management
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• v.15 no.6
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• pp.53-62
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• 2014

Recently, the number of super high-rise building projects have been increased after recovering from international financial crisis. In super high-rise building project, vertical lifting is critical to overall project productivity, due to its limited lifting equipments. Also for projects which buildings' height are higher than 400m, transfer operation in lifting is inevitable because of lifts' maximum lifting height. In transfer operation, setting a transfer floor is essential for saving lifting time of resources. In this research, using discrete event simulation modeling with AnyLogic 7.0 software and metaheuristic optimization with OptQuest software, the method of optimizing a transfer floor for workers during the morning peak time is proposed. Comparing to the result of the case which transfer floor is designated to the middle floor, setting optimized transfer floor significantly decrease the total lifting time of workers. By using proposed simulation and optimization tool, saving budget and time through increasing available working hour is expected.

• The Journal of Sustainable Design and Educational Environment Research
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• v.16 no.3
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• pp.9-17
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• 2017

This study investigates and analyzes the convenience facilities to strengthen or mitigate the Barrier Free awareness and Kindergarten Barrier Free for the kindergarten school staff and the public facility officials of the education office. In addition, to improve the Barrier Free, the improvement facilities of the kindergarten were investigated and analyzed. First, from the institutional viewpoint, it is necessary to amend the existing regulations of the Act for the Promotion of the Convenience Promotion of Disabled Persons, Elderly and Pregnant Women in Korea, and to change the facilities for duties and recommended installation of the kindergarten and the Barrier Free certification standards. Second, in order to apply the Barrier Free certification system to the kindergarten in terms of facility environment, it is necessary to activate the barrier kind of the kindergarten so as to receive the Barrier Free certification by lowering the score of the items difficult to improve due to the terrain or building structure. Third, the perception of Barrier Free is still not high in terms of social awareness. The purpose of this study is to investigate the method of creating a Barrier Free for a kindergarten in the education and living space of children who are the socially underprivileged. Therefore, based on this study, it is anticipated that it will be an opportunity to promote change of Barrier Free in Kindergarten if an attempt is made to improve the Barrier Free certification index suitable for public kindergarten.

• Journal of the Korea Concrete Institute
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• v.24 no.5
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• pp.559-566
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• 2012

In this study, fiber elements and a spring are used to build a reinforced concrete shear wall model. The fiber elements and the spring reflect flexural and shear behaviors of the shear wall, respectively. The fiber elements are built by inputting section data and material properties. The spring parameters representing strength and stiffness degradation, pinching, and slip were determined by comparing behaviors of fiber element and VecTor2 results. 'Pinching4' model in OpenSees is used for shear spring. The parameter selecting process for shear spring is a complicated and time consuming process. To study the applicability of the fiber element, reinforced concrete buildings containing a shear wall are evaluated using nonlinear dynamic analysis with various wall aspect ratio (H/L), various beam heights, and stiffness and flexural strength of beam and wall ratios. The aspect ratio of the wall showed distinct difference in IDR (interstory drift ratio) of the models with and without spring. On the other hand, the height of beam and ratio of stiffness and flexural strength of beam and wall did not show clear relation.

• Journal of Advanced Marine Engineering and Technology
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• v.41 no.4
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• pp.302-309
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• 2017

If a hydrogen explosion occurs in a containment building, its multiplex defense wall may be destroyed and a large amount of radioactive material may be released. The hydrogen occurred interacting with melting fuel rods must be effectively controlled and removed. however, the countermeasures for reducing explosion risk are difficult to carry out, due owing to the various variety of accident scenarios causes and the irregularity of hydrogen distribution and behavior. In this study, We examine the guide structures while considering the ambient flows, in order to improve the efficiency of PAR the widely used Passive Autocatalytic Recombiner(PAR). We simulate the fluid behavior and the hydrogen reduction rate were simulated when a guide is attached to the two-step catalyst PAR. For an upward flow, the consisting of a height of 150mm, a gap of 0mm, and a performs $60^{\circ}$ showed the best. In contrast, for a sideways flow, a consisting of the height of 150mm, a gap of 100mm, and a performs $60^{\circ}$ showed the best in the case of side ward flow. for a downward flow, a consisting of the height of 50mm and a directly attached guide produce the best in the case of down ward flow results.

• Journal of the Korean Institute of Landscape Architecture
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• v.37 no.3
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• pp.61-68
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• 2009

The objective of this study was to examine the possibility of utilizing the immersion stereoscopic image with a curved-screen-display as a tool for evaluating the landscape. The curved-screen-display ensures the continuity of the image and can be simultaneously evaluated by many people. Fifty-meter-wide Gangnamdaero Boulevard in Seoul was selected for this study, and the simulation was done using computer graphics. With the computer simulation, a questionnaire on landscape preferences was conducted according to different visual environments (immersion, non-immersion) and different projection types(stereoscopic or plane image). In the results of this study, the landscape preference was largely dependent on the immersion environment. Using the immersion-type simulation, the observer can easily evaluate the preference with higher judgment power. The stereoscope or plane projection type does not have any significant result in terms of its judgment power. This result implies that it is very important to strengthen the sense of immersion by expanding the screen into an angled view in which the observer can become immersed while making and projecting the simulation to evaluate the landscape. As a landscape evaluation tool for examining the efficiency and usefulness of immersion simulation, this study has limitations in that it controls many factors in street landscape that adversely affect judgment. Accordingly, a detailed comparison and verification of the stereoscopic image in various environments, including street width and building height ratio, must be conducted.

• Journal of Korean Society for Geospatial Information Science
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• v.22 no.3
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• pp.137-143
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• 2014

Recently, as new paradigm for government operation called government 3.0, government is actively operating policy opening and sharing public data. In addition, the Ministry of Land are operating an open platform integrated map service (the VWorld) which provides a variety of video contents such as the country's national spatial information, traffic information and three-dimensional building for the public. According to W3C Foundation's Open Data Status Report(2013), our country has the evaluated results that the part of the government's policy support and planning is good while the part of the data management is vulnerable. So our country needs the quality improvement for the data management. In addition, a digital aerial photograph image data is required to be up-to-date for the three-dimensional spatial object data. In this paper, we present the method for enhancement of the accuracy of vertical position and for maintainment of up-to-date vertical position. Our methods evaluate the data quality and analyze the cause of error of measurement utilizing the national standard quality assessment method. The result of research shows that the accuracy of vertical position is improved if the height of the building captain is adjusted by the quality assessment values and a three-dimensional model has up-to-date data if reconstruction and extension information of construction register is utilized.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.292-292
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• 2018

2016년 태풍 "차바"로 인한 부산과 울산지역의 침수 및 2003년 발생한 태풍 "매미"로 인한 마산창원지역의 침수사례는 우리나라 해안도시유역이 해수면 상승에 의한 피해에 노출되어 있음을 간접적으로 입증하는 대표적 사례라 할 수 있다. IPCC 4차 평가보고서에 따르면 전 지구적 차원에서 지난 100년 동안 해수면은 약 1.7 m 상승하였으며, 1961~2003년 사이 해수면 상승률은 연평균 3.1 mm에 이르고 있다. 특히 우리나라 남해안은 연평균 3.4 mm씩 상승하고 있어 전 세계 해수면 평균 상승속도를 상회하고 있다. 또한 1990년대 이전보다 이후 기간에 우리나라에 영향을 준 태풍의 수가 많으며 평균적으로 태풍의 강도 및 해일고가 증가하고 있다. 따라서 전 지구적 해수면 상승과 태풍해일고 증가에 따른 복합적인 해수면 상승으로 인한 해안유역의 침수피해가 증가할 것으로 예상되며 특히 미래 발생 가능한 수퍼태풍에 의한 급격한 해일고의 상승은 해안유역에 침수피해를 더욱 가중시킬 것이라 예상된다. 특히 해수면 상승으로 인한 침수피해 특성은 홍수유출에 의한 내륙 침수피해와는 다른 특성을 보이고 있어 이에 대한 대응기법 개발이 절실한 실정이다. 따라서 본 연구에서는 해수면 상승에 따른 해안도시지역 대한 침수피해 예방 및 저감을 위한 침수모의기법을 개발하고 효율적 대응방안을 선정하는 기법을 제안하였다. 부정류 특성을 지닌 해수면 상승 경계조건 및 건물 간 도로를 통해 흐름이 발생하는 특성을 고려하여 해안지역의 시공적 침수규모 및 유속 등을 예측할 수 있는 2차원 수치모형을 개발하였다. 2003년 발생한 태풍 "매미" 발생 기간 동안 관측된 실제 해일고를 적용하여 창원 등 해안도시유역에 범람모의를 수행하였으며 실제 침수흔적과 비교함으로써 모형을 검증하였다. 또한 해안 경계선을 따라 월파방지벽을 설치하는 경계조건을 도입하여 월파방지벽 높이에 따른 해안도시유역 침수규모를 산정하여 월파방지벽 높이에 따른 시공적 침수규모를 분석함으로써 월파방지벽의 효과를 확인하였다. 본 연구결과는 해안지역 지점별 침수규모 및 최대 침수심 발생시간을 제공함으로써 침수에 따른 중장기적 구조적 대응방안 수립은 물론 초단기적 예상 해수면 상승에 다른 대피경로 제공 등 비구조적 수재해 대응 기법을 제시하는 기초자료를 제공에 활용 할 수 있을 것으로 기대된다.

• Journal of Bio-Environment Control
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• v.31 no.3
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• pp.188-193
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• 2022

The Korean mint (Agastache rugosa Kuntze) is used as a leaf vegetable. Therefore, it is important to improve the quality and quantity of leaves by maintaining vegetative growth. When the development of a plant is switched from vegetative to reproductive growth, leaf development may be lowered, leading to a decrease in marketability. Therefore, this study was conducted to investigate the effect of the photoperiod on the flowering characteristics and inflorescence development of the Korean mint to select an appropriate photoperiod for leaf production. The seeds were sown in 105-cell trays on 29 November 2021, and planted in each pot on 27 December 2021, when four main leaves appeared. After planting, the light/dark period was adjusted to 10/14hrs, 12/12hrs, 14/10hrs, 16/8hrs. After 19 days of planting, the first flowering occurred in 10/14hrs, which had a short photoperiod, and the 12/12hrs had 20 days for flowering, and other treatments had 21 days. In addition, it was confirmed that the Korean mint has the characteristics of facultative quantitative short-day plant, through the increase in the development of inflorescences as the light period is shorter than the dark period. As for the growth of Korean mint, the longer the photoperiod, the higher values were shown with leaf length, number of leaves, fresh weight, dry weight, and leaf area of the shoot. Therefore, it is considered that 14 h or more light period is suitable for increasing the productivity of Korean mint as a leafy vegetable.