• International conference on construction engineering and project management
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• 2024.07a
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• pp.606-612
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• 2024

The modeling and simulation of built environments are crucial preliminary steps for their design, planning, and management. Among various simulation methods, agent-based modeling (ABM) has recently gained traction for simulating built environments due to its ability to effectively model and capture complex interactions between simulated entities. The increasing applications of ABM for the simulation of built environments necessitate a comprehensive review of past scientific endeavors with positive accomplishments and those that remain unsolved. This study seeks to address this gap by reviewing ABM and its applications in the simulation of built environments, with a specific focus on the planning and design phases. First, the research introduces ABM and its unique features concerning the simulation of built environments. Second, it conducts a systematic review of past studies in the planning (e.g., feasibility analysis, risk management, and scheduling under constraints) and design (e.g., automated design, collaborative design, improving operations, and facilitating evacuation) aspects of built environments. Finally, following the in-depth review and subsequent analysis, the study identifies the strengths and weaknesses of using ABM for simulating the built environments. The study concludes with a remark on potential future research directions to overcome the limitations of the existing studies.

• The Korean Journal of Health Service Management
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• v.10 no.3
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• pp.159-171
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• 2016

Objectives : This study was performed to investigate the characteristics and ADL(Activities of Daily Living) associated factors of elderly inpatients in long-term care hospitals. Methods : Data were collected from the nationwide data of 'Survey of Patients (2013-2014)' administerd by the Ministry of Health & Welfare. The data included in this study consisted of 27,606 cases of elderly inpatients in long-term care hospitals. Results : The survey scores for the elderly inpatients were as follows: 57.6% 'Needed much and total help' with ADL, followed by 26.6% who 'Needed much help', and 15.8% who 'needed minimal supervision' in long-term care hospitals. The ADL score was high in the following categories: women, old age, referred visit, health insurance type, not-recovered & death, transferred, corporate hospitals, small hospital size, low number of physicians per 100 beds, and high number of nursing staff per 100 beds. The inpatients with 'diseases of the nervous system', 'diseases of the circulatory system' and 'diseases of the genitourinary system' were more likely to have high ADL scores. Conclusions : The results of this study suggest that long-term care hospitals should provide active and proper care for patients with high ADL scores and improve medical personnel training as well provide more medical care.

• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.604-606
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• 2011

Purpose This study analyzes resistance spot weldability of DP60 steels. Methodology To compare the resistance spot weldability of DP60 steels, tensile strength test and macro-section test were conducted for the resistance spot welds. Acceptable welding conditions were determined as a function of the resistance spot welding process parameters such as electrode force, welding time, and welding current. The lower limit of the welding lobe was the minimum shear tension strength for 590MPa-grade steel while the upper limit was determined whether or not expulsion was detected. Findings Welding force is 200kgf more appropriate in terms of 300kgf the larger the width of the welding zone. Acceptable welding current condition and welding lobe were changed depending on welding force. Research limitations This study is forced on inverter DC resistance spot weldability of 590Mpa-grade steels for automotive application. Practical implications This study confirms the weldability of DP60 steel by comparing resistance spot weldability depending on welding force. Originality This study analysed resistance spot weldability depending on welding force. wedability of DP60 steel were determined by welding lobes.

• Journal of Family Resource Management and Policy Review
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• v.17 no.4
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• pp.39-56
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• 2013

The purpose of this study was to examine the influence of the resilience of families of middle-aged married men upon the perception of family stress. The subjects were 301 married men age 40.54 living in Seoul and Gyeonggi Province, Korea. Participants were selected using a purposive sampling method and a convenience sampling method. The data were statistically processed using the SPSS 18.0 program. First, participants who perceived family stress less and had higher family resilience tended to be better educated, have higher average family incomes, have permanent employment, be religious, and have no experience of unemployment. Participants who had low-paying, physical labor-based jobs or who were contract workers perceived family stress more and had lower family resilience. Second, among the variables that affected family resilience, those that most influenced the perceptual extent of family stress were the sense of belief system's family control, having a positive perspective, flexibility with regard to morality, religion, and organizational patterns, connectivity, family resources, communication-oriented mutual cooperative problem-solving, and emotional response. Third, the influence of family resilience upon the perception of family stress measured at 44.2% based on regression analysis and was statistically significant (F=4.606, ***p<.001).

• Journal of the Korea Institute of Building Construction
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• v.12 no.6
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• pp.596-606
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• 2012

In recent years, LEED-NC (Leadership in Energy and Environmental Design for New Construction) has become one of the most widely adopted environmental certification systems in the United States. However, according to some researchers, the adoption of the LEED-NC is perceived to add to construction cost and duration compared to conventional building standards. Therefore, it is necessary to examine the economic benefits of LEED-NC to consider how it can be applied worldwide. This study focuses on the impact of LEED-NC on the appraised unit value of parcels in San Francisco County based on the number of LEED-NC Public Transportation Access (PTA) qualified buses, light rail and commuter rail stops, distance to the closest bus, light rail and commuter rail stops, zoning class and parcel size. As a population of interest, San Francisco County was chosen since it is known as a region with well-organized transportation systems including bus, light rail and commuter rail systems. According to the correlation results, this study shows that the appraised land value is significantly affected by LEED-NC PTA, and is correlated to a higher appraised unit value of land parcels.

• Korean Journal of Veterinary Research
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• v.45 no.4
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• pp.601-606
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• 2005

The disease causing colic is the greatest cause of death in the domestic horse population today and accidental deaths as a result of colic leads to decreased productivity and economic losses in the horse breeding industry. Large colon impaction is the most common cause of colic in horses. Horses may ingest sand either by eating from the ground in sandy locations, or because of its inclusion in hay. In certain areas sand impaction is relatively common. The horse (4 year, female) presented with abdominal pain, which was charactered by willing to lie down, pawing, and looking at flank. A month later, the horse died suddenly at sand paddock. Post-mortem examination revealed the sand impaction as a lot of feces, sand and gravels in the right dorsal colon. In addition, there was necrosis and debilitation in mucosal lining of the large colon and rupture site on the right dorsal colon. The purpose of this article is to review sand impaction and emergencies in Thoroughbred horses.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.10
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• pp.769-781
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• 2020

This study attempts to examine the relationships between transformational leadership, learning orientation, firm innovativeness, and financial performance. Specifically, the moderating effect of learning orientation and firm innovativeness. The data collected from 606 SMEs in Thailand were evaluated using the structural equation modeling, typifying that quantitative research. The results revealed that transformational leadership had a positive effect on learning orientation. Similarly, transformational leadership had a positive effect on firm innovativeness. Further, the study found that transformational leadership had a positive indirect effect on financial performance through the mediation of learning orientation. The results of the study found that transformational leadership had a positive indirect effect on financial performance through the mediation of firm innovativeness. Transformational leadership and learning orientation to improve innovation within the organization, including organizations and leaders among themselves. Especially, innovative firms inculcate ideals of promise to learning, open-mindedness, and shared vision. Furthermore, practitioners can use the findings of this study when they perform their role of leaders to challenge creativity and innovation among followers. Finally, those developments would influence a procedure of evidence procurement, evidence distribution and shared explanation that escalations equally individual and administrative effectiveness owing to its influence going on products.

• Journal of Korean Elementary Science Education
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• v.33 no.3
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• pp.597-606
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• 2014

The purpose of this study is to survey and analyze difficulties in teaching and learning elementary school science on the chapter titled 'electric circuit'. 28 elementary school teachers who teach 5th grade science and 73 5th grade students in elementary school were taken part in this survey. The pilot questionnaire was distributed to find out both the degree and the reason of difficulties in teaching and learning. The answers are analyzed with four areas to extract elements which make class difficult; Learner factors (L), Instruction factors (I), Curriculum & textbooks factors (C), and Environment factors (E). The results are as follows. (1) It can be seen that both students and teachers feel the highest difficulty in 7th lesson 'the direction of current', while they felt little difficulty in lesson 3 'conductor and nonconductor' and lesson 8 'the safety of electricity'. (2) The most mentioned reason of difficulties in teaching and learning was Learner factors (L). (3) Teachers felt many difficulties in experimental environment. On the other hands, students didn't think experimental failures as serious trouble. (4) Students felt many difficulties in new terms and hazy concepts or expressions. (5) Teachers felt a lot of difficulties in those from Curriculum & textbooks factors.

• Journal of the Korean Ceramic Society
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• v.44 no.11
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• pp.597-606
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• 2007

With the advent of ubiquitous age, the high quality dielectric materials have been required for the wireless communications available to the millimeterwave as well as microwave frequencies. The utilizable region for the frequency has been expanding to the millimeter-wave region because of the shortage of radio frequency (RF) resources. These high frequencies would be expected for ultra high speed LAN, ETS and car anti-collision system on the intelligent transport system (ITS) and so on. Silicates are good candidates for microwave/millimeterwave dielectrics, because of their low dielectric constant ${\epsilon}_r$ and high quality factor (High Q). Forsterite ($Mg_2SiO_4$) is one of the silicates with low ${\epsilon}_r$ of 6.8 and Q f of 240000 GHz. In this paper, we reviewed following three categories for synthesis of forsterite: (1) Synthesis of high Q forsterite (2) Adjust the temperature coefficient of resonant frequency $TC_f$ (3) Diffusion of $SiO_{4^-}$ and Mg-ions on the formation of forsterite.

• Journal of Korean Clinical Health Science
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• v.7 no.1
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• pp.1215-1223
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• 2019

Purpose: This study is to figure out not only the characteristics relating to transfer time of inter-hospital transfer patient which is transferred by a private ambulance, but also factors influencing the transfer time. Methods: In this study, an analysis of 750 patients with high severity levels among those transferred to another hospital by a private ambulance in Busan for whole year of 2017. Results: The results showed that the following factors significantly influence the total inter-hospital transfer time: Ambulance crew (${\beta}=10.525$, p=.001) and patient and carer (${\beta}=37.606$, p<.001) when setting a doctor (selecting a medical institution) as a criterion; availability of the specialized care (${\beta}=12.435$, p=.008) when setting the near distance (reason for selecting a hospital for transfer) as a criterion. The explanatory power of this analysis was R2=0.423, whereas the explanatory power of calibration was R2=0.411. Conclusions: Factors that increase the total inter-hospital transfer time were the ambulance crew, and patient and carer's selecting a medical institution, and the reason for selecting a hospital where enables to offer the specialized care services.