• Advances in Computational Design
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• 제7권4호
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• pp.297-319
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• 2022

Due to their natural and social revelation, also their ease and flexibility, human collective behavior and teamwork sports are inspired to introduce optimization algorithms to solve various engineering and scientific problems. Nowadays, meta-heuristic algorithms are becoming some striking methods for solving complex real-world problems. In that respect in the present study, the authors propose a novel meta-innovative algorithm based on soccer teamwork sport, suitable for optimization problems. The method may be referred to as the Soccer League Optimization-based Championship Algorithm, inspired by the Soccer league. This method consists of two main steps, including: 1. Qualifying competitions and 2. Main competitions. To evaluate the robustness of the proposed method, six different benchmark mathematical functions, and two engineering design problem was performed for optimization to assess its efficiency in achieving optimal solutions to various problems. The results show that the proposed algorithm may well explore better performance than some well-known algorithms in various aspects such as consistency through runs and a fast and steep convergence in all problems towards the global optimal fitness value.

• 한국공간구조학회:학술대회논문집
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• 한국공간구조학회 2008년도 춘계 학술발표회 논문집
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• pp.197-202
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• 2008

한국토지공사는 주거, 금융센터, 리조트 시설, 쇼핑 몰, 관광과 스포츠 시설을 포함하는 대규모 단지계획으로서 인천 청라지구를 계획하고 있다. 대규모 단지 (1780만$m^2$)중에 하나가 건설 중이다. 전체지역을 6개의 지역으로 구분하고 6개의 보석 명칭(크리스탈, 샤파이어, 루비, 에머랄드, 자드, 진주, 다이아몬드)들을 부여하고 있다. 한국토지공사는 3개의 주거 단지에 그 지역을 대표할 수 있는 다양하고 특별한 형태와 구조 시스템을 요구하였다. 본인은 이러한 구조형태의 인도교를 소개하고자 한다. 4개의 사장교 뿐만 아니라, 아치교과 트러스교들이 계획되었다.

• Steel and Composite Structures
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• 제48권4호
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• pp.443-459
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• 2023

This paper investigates the stability of a bi-directional functionally graded (BD-FG) cylindrical beam made of imperfect concrete, taking into account size-dependency and the effect of geometry on its stability behavior. Both buckling and dynamic behavior are analyzed using the modified coupled stress theory and the classical beam theory. The BD-FG structure is created by using porosity-dependent FG concrete, with changing porosity voids and material distributions along the pipe radius, as well as uniform and nonuniform radius functions that vary along the beam length. Energy principles are used to generate partial differential equations (PDE) for stability analysis, which are then solved numerically. This study sheds light on the complex behavior of BD-FG structures, and the results can be useful for the design of stable cylindrical microstructures.

• 산경연구논집
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• 제14권6호
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• pp.1-8
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• 2023

Purpose: The marketing practice for the leisure and sports industry is a complex process that requires a thorough understanding of the audience, their needs and motivations. Thus, this niche market is focused on specific products, services, or experiences. The present research explores and suggests meaningful strategies based on the literature textual dataset to provide how to attract consumers in this sector. Research design, data and methodology: We have conducted the 'Secondary Literature Analysis', reviewing and summarizing numerous findings in the relevant prior studies. As a result, we could obtain a total of 15 significant textual resources which are from only peer-reviewed journal article. All resources had a high quality of the instrument to prove their results. Results: The findings of this research pointed out that marketers in leisure sports sector need to communicate via following methods: (1) Understanding the Customers' Needs and Wants, (2) Social Media, (3) Advertising, (4) Promoting Brand Affinity, (5) Offering Discounts, and (6) Providing Value-Added Services. Conclusions: The present research concludes that the marketing practice in the leisure and sports industry should be performed using various channels. In addition, marketing practitioners are supposed to check if tailored marketing messages are compatible with products, services, and events that relate to their target audience's interests.

• Asian Pacific Journal of Cancer Prevention
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• 제17권12호
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• pp.5295-5302
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• 2016

Objectives: A physically active lifestyle is important for cancer survivors. Therefore, this study was conducted to 1) provide population-based estimates of the prevalence of physical activity and sitting time, and 2) their correlates in Korean cancer survivors. Materials and Methods: This study analyzed a cancer survivor subsample (N=1,482) from 2008-2013 Korea National Health and Nutrition Examination Survey (KNHANES), data selected with a complex sampling design. Overall and subgroup-specific prevalences of physical activity and sitting time were estimated. Correlates of moderate- to vigorous-intensity physical activity ( MVPA) and sitting time were tested using age-group-specific hierarchical multiple regression models. Results: Overall adherence rate to physical activity guidelines was 34.9% (95% CI=31.5-38.4). Age-group-specific adherence rates were 41.1% (95% CI=36.3-45.9) in adults (30-64 years old), and 25.3% (95% CI=21.0-25.3) in older adults (65 years or older). Adults spent 213.33 minutes (95% CI=172.4-254.3) per week on MVPA and 55.3 minutes (95% CI=36.4-64.6) on sitting time per day. In adults, sitting time was significantly associated with employed status (B=28.0, p=0.046), smoking (B=-47.4, p=0.020), and number of comorbidity conditions (B=-13, p=.037). MVPA was significantly associated with marital status (B=134.9, p<0.001), employment status (B=98.12, p=.046), and years since cancer diagnosis (B=104.7, p=0.015). Older adults spent 162.2 minutes (95% CI=119.5-204.8) per week on MVPA and 63.0 minutes (95% CI=45.0-89.5) on sitting time per day. Their significant correlates were sex (B= -45.2, p=0.014), smoking (B=-70.14, p<0.001), and years since cancer diagnosis (B=37.0, p=0.024). Age (B=5.8, p=0.042) and marital status (B=83.8, p=0.033) were also significantly associated with MVPA in older adults. Conclusion: A majority of Korean cancer survivors do not sufficiently participate in physical activity. In general, older, unhealthier, non-working, and being unmarried were risk factors for physical inactivity. While this study informs public health policy makers and practitioners about physical activity intervention demand for cancer survivors, future investigations should address psychosocial mediators to better inform intervention programs.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제26권3호
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• pp.143-148
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• 2015

The purpose of this review was to investigate the relationship between aerobic exercise and cognitive function as well as synthesize the effect of aerobic exercise intervention studies centered on psychiatric symptoms associated with general cognitive deficit. Prospective studies on aerobic exercise and improvement of cognitive function were reviewed and synthesized. In addition, this literature review provides significant positive results on the relationship between aerobic exercise and general cognitive deficit associated with psychiatric symptoms. Review of this literature suggests that there is a positive relationship between participation in aerobic exercise and cognitive function. In this text, there are at least three general pathways by which aerobic exercise may facilitate executive function in children : 1) cognitive demands inherent in engaging in physical activity, 2) cognitive demands inherent in cooperation of complex motor tasks, and 3) physiological changes resulting from aerobic exercise. Another main finding of this review is that physical activity has a stronger influence on cognitive deficit, including attention-deficit hyperactivity disorder, depression, and anxiety. Development of cognitive function is the most important factor for children and youth. Therefore, future research should prove relationship between physical activity and cognitive function using a more scientific and quantitative approach design.