• 성인간호학회지
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• 제26권6호
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• pp.614-620
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• 2014

Purpose: The purpose of this study was to examine the levels of resilience, depression, and self-esteem of hemodialysis(HD) patients, and to find out the factors influencing resilience. Methods: The subjects of this descriptive correlational study was 83 outpatients in H hospital in Seoul, Korea, who receive hemodialysis regularly. Data was analyzed by SPSS/WIN 18.0 program. Results: The resilience of HD patients were statistically different by gender, job, economical state, most supportive person, and recent condition. Self-esteem had positive correlation, while depression had moderate negative correlation with the resilience of HD patients. In regression analysis, depression had significant explanation power, which accounted for 25.4% of the resilience. Conclusion: The results of this study provide basic data for developing a resilience promoting program. Since health-related conditions of HD patients affect their levels of resilience, individualized assessment and management of complications are necessary. Also, as the resilience is related to family support, activating support groups for HD patients and their spouses would be helpful to promote their resilience.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.1195-1205
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• 2008

Composite piles have been used in ground conditions where conventional piles are unsuitable or uneconomical. They may consist of a combination of timber and concrete pile in Europe. One method of doing this was to drive a steel tube to just below water level, and a concrete pile was lowered down it and driven to the required level where corrosion was susceptible in U.K. Recently, a fiber reinforced polymer (FRP) composite pile was developed to use in many marine locations for piers and waterfront buildings in the USA(Hoy, 1995; Phair, 1997). A steel composite (SC) pile reinforced concrete spun pile with steel tube was also proposed and used for the foundation acting a high lateral earthquake load. Composite piles have been developed and researched to increase lateral resistance or to prevent corrosion in marine structures. In paper, the composite pile consisting of the steel upper portion and the concrete lower portion is proposed and are carried out several tests to confirm the capacity of the pile such as lateral load test, dynamic load tests and bending test. It is noted that the composite pile would be a economical pile being capable of increasing lateral resistance.

• Journal of Advanced Research in Ocean Engineering
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• 제2권3호
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• pp.99-111
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• 2016

Seabed affected by scouring, sedimentation, and siltation occurrences often cause exposure, which induces risks to existing structures or crude oil or gas pipeline buried subsea. In order to prevent possible risks, more economical structure installation methodology is proposed in this study by predicting and managing the risk. Also, the seabed does not only consist of sandy material, but clayey soil is also widespread, and the effect of undrained shear strength should be considered, and by cyclic environmental load, pore water pressure will occur in the seabed, which reduces shear strength and allows particles to move easily. Based on previous research regarding sedimentation or erosion, the average value of external environmental loads should be applied; for scouring, a 100-year period of environmental conditions should be applied. Also, sedimentation and erosion are mainly categorized by the bed load and suspended load; also, they are calculated as the sum of bed load and suspended load, which can be obtained from the movement of particles caused by sedimentation or erosion.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.1132-1141
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• 2006

Recently it is difficult to secure sand used in the improvement of soft ground, and so it is necessary to find alternative materials. For this reason many researchers are studying and trying to find new substitute materials. One of the materials is considered as converter slag by wind fracture which is generated in the production of steel manufacture by electric circuit. It is environment friendly since it is a recycled material and economical since it is cheaper than sand. To investigate the applicability of converter slag by wind fracture as the alternative material such as vertical drains, it is necessary to check the drainage effect of this in the field construction. In order to attain an successful design it is important to predict problems encountered in field construction. Accordingly, in this study the laboratory test was executed under different conditions in advance of applying of the field. A total of 4 cases including slag, sand+slag, pack slag and sand as vertical drains was conducted, and at the base of the laboratory test the field test was executed and analyzed.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.1014-1023
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• 2006

Soil nailing is a reinforcement method used for stabilizing excavated wall or slope. Due to its many advantages such as ease of construction and economical efficiency, use of soil nailing is increased. However, the soil nail can't trespass on the neighbor private land, which pays rent for use. For this reason, removable soil nailing system was developed. However, the removal rate of this system is just about $50\sim70%$. To solve this, the Fiber Reinforced Polymer (FRP) soil nailing system, which does not need to be removed and allows for the trespass on the private land, is developed. In this paper, through theoretical and experimental studies in laboratory and field, we evaluate the stability and behavior characteristics of the FRP nail system. Besides, numerical analyses using FLAC2D were performed for various soil conditions, where the simulations for pullout tests were carried out. As a result, compared with the conventional removable soil nailing system, the FRP soil nailing systems show similar behavior characteristics.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.659-666
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• 2004

Dynamic compaction has evolved as an acceptable method of site improvement by treating poor soils in situ. The method is often an economical alternative for utilizing shallow foundations and preparing subgrades for construction when compared with conventional solutions. In general, the installation purpose of dynamic compaction are to increase bearing capacity and decrease differential settlement within a specified depth of improvement. This method involves the s systematically dropping large weights onto the ground surface to compact the underlying ground. The weights used on dynamic compaction projects have been typically constructed of steel plates, sand or concrete filled steel shells, and reinforced concrete. Typically, weights range from 5-20 ton and base configurations are, circular or octagonal. In this study, the effective depth of improvement is evaluated based on the numerical analysis code, the dynamic analysis of FLAC-3D program, in order to analyze the influence parameters ; ground conditions, maximum applied load and the area of compaction plate.

• Journal of Ecology and Environment
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• 제31권4호
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• pp.277-290
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• 2008

In the past two decades Mikania micrantha Kunth, a climbing plant species originating from tropical America, has spread across Taiwan. It can now be found frequently in the lowlands and lower mountain areas up to 1,000 m a.s.l. in the centre and south of the island. Mikania micrantha is considered a problematic invasive alien plant species which is said to cause economical as well as environmental damage. This study investigated the ecological site characteristics of M. micrantha in Taiwan. 112 vegetation surveys were carried out in habitats where the alien plant was present. A comparison between sites with a high and a low abundance was carried out in order to assess which factors especially influence the extensive spread of the plant. Furthermore, the influence of disturbances was examined. Results showed that Mikania micrantha grows very dense in habitats which are characterized by good light conditions combined with vertical structures, such as trees. Results revealed that this invader occurs most frequently in agricultural fallows and wastelands, but it could hardly be found in the intensively managed plantations in the investigation area. Results provide great evidence that the plant is strongly influenced by disturbances, but only if impacts occur rarely.

• International Journal of Human Ecology
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• 제2권1호
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• pp.57-75
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• 2001

Since the Korean economic crisis in 1997, consumers are selecting goods that are more economical and more reasonably priced. Markets for wealthy people, however, have seldom been influenced by economic conditions. Consequently, 'noble marketing' is a new term that marketers should become acquainted with (Kim, 1998). The continuously expanding 'noble market' that generates high profit for marketers needs to be explored, especially the men's wear market. This study adopted a qualitative method (i.e., in-depth interview) with 16 male consumers each. These men who spent more than 3,600,000 won on apparel goods in 2000 and each man had purchased at least one item-suit, jacket, trousers, or coat-from a list of high-priced brands that were selected by the researcher. Findings imply that material or functional benefit of the high-priced apparel were not a critical determinant for choosing the brand. Rather, a socially well-established image for the brand name, especially in terms of psychological/symbolic appeal, played a more important role. This finding supported previous studies. Therefore, for high-priced men s wear, the role of promotion, including advertising or word of mouth, is critical; the image that advertisers should promote is one that characterizes the clothing, and ultimately the wearers, as dignified, legitimate, traditional, and upper class.

• 한국기계가공학회지
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• 제11권3호
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• pp.122-129
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• 2012

This study investigates structural and vibration analyses according to the thickness of bicycle frame tube. The model of bicycle frame has the dimension as length of 862mm, width of 100mm and hight of 402.5mm. There are 3 kinds of models with tubes of top, down and seat at bicycle frame as thicknesses of 10, 15 and 20mm. The maximum displacement and stress occur at the center part of seat stay and at the installation part of rear wheel respectively. Maximum displacements become 0.031936, 0.029159 and 0.027984mm in cases of thicknesses of 10, 15 and 20mm respectively. In case of thickness of 20mm among 3 cases, maximum displacement becomes lowest. But maximum stresses become 10.019, 8.5492 and 9.2511MPa in cases of thicknesses of 10, 15 and 20mm respectively. In case of thickness of 15mm among 3 cases, maximum stress becomes lowest. There is no resonance at practical driving conditions and natural frequency remains almost unchanged along the change of thickness. In case of the displacement due to vibration mode, the displacement difference at thickness between 15mm and 20mm becomes 1/2 times than that between 10mm and 15mm. Design at bicycle frame tube becomes most economical and durable effectively in case of thickness of 15mm among 3 cases.

• 한국공간정보시스템학회 논문지
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• 제1권1호
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• pp.79-88
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• 1999

본 논문에서는 화물운송체계에 GIS/GPS 기반의 AVL을 적용하기 위한 핵심요소기술을 검토하고, 시스템 구성대안을 설정하였다. 또한 시스템 구성대안들을 Life-Cycle Cost 분석을 통하여 평가하였다. 기본가정 및 비용단가에 의한 분석결과 개별차량의 무선통신비용의 부담이 노변통신시설의 유지보수 비용에 비해 전체 LCCE에 큰 영향을 미치는 것으로 나타나 무선통신대안이 상대적으로 고비용의 시스템 구성안인 것으로 분석되었다. 그러나 여러 가지 요인에 따른 민감도 분석결과 노변시설의 설치간격, 무선통신비용단가의 하락 등을 가정할 경우 무선통신대안이 운영측면의 경제성을 갖는 것으로 분석되었다. 무선통신대안과 노변통신대안 모두 각각의 장단점을 갖고 있으므로 지역적 특성 내지는 교통시설의 특성에 따라 혼합적용하는 방안이 검토되어야 한다. 본 연구는 GIS/GPS-AVL의 화물운송체계 적용시 시스템구성요소 및 구축방향을 결정하는데 도움을 줄 것이다.