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Fatigue evaluation and CFRP strengthening of diaphragm cutouts in orthotropic steel decks
Lu Ke,Chuanxi Li,Jun He,Yongjun Lu,Yang Jiao,Yongming Liu 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.39 No.4
The cracking at the transverse diaphragm cutout is one of the most severe fatigue failures threatening orthotropic steel decks (OSDs), whose mechanisms and crack treatment techniques have not been fully studied. In this paper, full-scale experiments were first performed to investigate the fatigue performance of polished cutouts involving the effect of an artificial geometrical defect. Following this, comparative experimental testing for defective cutouts strengthened with carbon fiber-reinforced polymer (CFRP) was carried out. Numerical finite element analysis was also performed to verify and explain the experimental observations. Results show that the combinative effect of the wheel load and thermal residual stress constitutes the external driving force for the fatigue cracking of the cutout. Initial geometrical defects are confirmed as a critical factor affecting the fatigue cracking. The principal stress 6 mm away from the free edge of the cutout can be adopted as the nominal stress of the cutout during fatigue evaluation, and the fatigue resistance of polished cutouts is higher than Grade A in AASHTO specification. The bonded CFRP system is highly effective in extending the fatigue life of the defective cutouts. The present study provides some new insights into the fatigue evaluation and repair of OSDs.
The Relationship between Ports and City Growth: The Case of Ningbo
Lu Ke,오용식 한국무역연구원 2023 무역연구 Vol.19 No.1
Purpose – The purpose of this paper is to explore the relationship between port and city growth with the help of the port impact curve and relative concentration index (RCI). This is done from the two aspects of (1) clarifying the characteristics of the interaction between Ningbo port and city, and (2) clarifying the phased development of the relationship between Ningbo port and city. Design/Methodology/Approach – Based on the method of the port impact curve and RCI, we conduct a case study of Ningbo, a port-city in Southeast China, and we also make a meaningful comparison between Ningbo and other famous port cities in China. Findings – This paper finds that Ningbo port and city have been in a relatively loose relationship from 2010 to 2021. Over these 12 years, the relationship between Ningbo port and city has shown signs of changing from the stage of agglomeration and diffusion effect to the stage of urban self-growth effect. Also, we find that, compared with other port cities, the positive correlation between Ningbo port cargo throughput and urban economy development is relatively weak. However, Ningbo’s export-oriented economic characteristics form a certain boost for the development of port container throughput. Research Implications – In the management of this paper, this study revealed the flexibility and complexity of the port-city relationship, suggesting that the stage characteristics of the port-city relationship should be combined on the road of the sustainable development of ports and cities, which will also provide reference for follow-up research.
Women in Higher Education Management in Thailand
Luke, Carmen Ewha Womans University Press 1997 Asian Journal of Women's Studies(AJWS) Vol.3 No.4
This paper reports on a case study of ten academic of ten academic women in senior management positions in the higher education sector in Thailand. The study investigates women's perceptions of 'glass ceiling' factors that impede women's career advancement. Issues addressed include: gendered management styles, family and childcare responsibilities, career plans and aspirations, married or single status, and age as a factor mediating women's career mobility. It is argued throughout that the western concept of glass ceiling cannot be taken as a universal explanation of women's career impediments. Rather, research on women's career tracks in higher education must take women's differences, their histories, and cultural locations into analytic account.
Luke Taylor,Chieko Kimata,Andrea M. Siu,Samantha N. Andrews,Prashant Purohit,Melissa Yamauchi,Andras Bratincsak,Russell Woo,Cass K. Nakasone,Sian Yik Lim 대한골다공증학회 2021 Osteoporosis and Sarcopenia Vol.7 No.3
Objectives: To investigate trends of osteoporosis treatment rates, and factors affecting osteoporosis treatment after hip fracture admission within a single health care system in Hawaii. Methods: A retrospective chart review was conducted of patients aged 50 years or older and hospitalized for hip fractures between January 1, 2011 and December 31, 2019 at Hawaii Pacific Health, a large health care system in Hawaii. We collected data on basic demographics and osteoporosis medication prescription from electronic medical records. We evaluated trends of osteoporosis treatment rates and performed logistic regression to determine factors associated with osteoporosis treatment. Results: The mean for treatment rates for osteoporosis from 2011 to 2019 was 17.2% (range 8.8%-26.0%). From 2011 to 2019 there was a small increase in treatment rates from 16.3% in 2011 to 24.1% in 2019. Men were less likely to receive osteoporosis treatment after admission for hip fracture. Patients discharged to a facility were more likely to receive osteoporosis treatment. As compared to women, men who had a hip fracture were less likely to receive dual-energy X-ray absorptiometry scan, and osteoporosis medication before hip fracture admission. Conclusions: The use of osteoporosis medication for secondary prevention after admission for hip fracture in Hawaii from 2011 to 2019 was low. However, there was a small increase in treatment rates from 2011 to 2019. Disparities in treatment of osteoporosis after hip fracture were noted in men. Significant work is needed to increase treatment rates further, and to address the disparity in osteoporosis treatment between men and women.
Setting the Research Agenda of the eSports Revolution
Luke Butcher,Kevin Teah 글로벌지식마케팅경영학회 2023 Journal of Global Sport Management Vol.8 No.2
A titan of popular culture and commerce, the positive trend lines of eSports audiences, participation and commercial output run counter to those of many traditional sports. Despite the reluctance of the uninitiated to consider them ‘sports,’ eSports continues to evolve, grappling with similar issues emerging from advancements in technology, ethics, inclusion, and the incursions of brands into this identity-driven entertainment industry. These issues and more warrant the attention of sports management scholars. Thus, a deeper scholarly understanding is achieved through examining a diverse range of perspectives, including understanding eSports players themselves, how they interact, the health and wellness challenges they face, and how the industry is impacted by the necessary commercial involvement of big brands. In synthesizing these insights with traditional sports management knowledge organisations, brands, and policy makers can contribute to fostering an industry that has captured the interests of many millions across the globe.