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The lightweight design of aircraft seats can significantly improve fuel efficiency and reduce greenhouse gas emissions. Metal additive manufacturing (MAM) can produce lightweight topology-optimized designs with improved performance, but limited build volume restricts the printing of large components. The purpose of this paper is to design a lightweight aircraft seat leg structure using topology optimization (TO) and MAM with build volume restrictions, while satisfying structural airworthiness certification requirements.

TO was used to determine a lightweight conceptual design for the seat leg structure. The conceptual design was decomposed to meet the machine build volume, a detailed CAD assembly was designed and print orientation was selected for each component. Static and dynamic verification was performed, the design was updated to meet the structural requirements and a prototype was manufactured.

The final topology-optimized seat leg structure was decomposed into three parts, yielding a 57% reduction in the number of parts compared to a reference design. In addition, the design achieved an 8.5% mass reduction while satisfying structural requirements for airworthiness certification.

To the best of the authors’ knowledge, this study is the first paper to design an aircraft seat leg structure manufactured with MAM using a rigorous TO approach. The resultant design reduces mass and part count compared to a reference design and is verified with respect to real-world aircraft certification requirements.

In concert with an ambitious national agenda that emphasizes free trade and globalization, lncheon Metropolitan City is taking the first steps toward reinventing itself to become a twenty-first century “Pentaport” with integrated Seaport, Airport, Technoport, Business Port, and Leisure Port components. The lncheon Pentaport transformation-projected to be complete by 2020-will entail significant industrial, sociological, and institutional modification. Leisure Port objectives can be achieved through responsible planning attuned to the ideal of sustainable development and by empirical studies of lncheon tourism and leisure dynamics. International benchmarks of leisure port success are found in Sydney, Australia; Vancouver, Canada; and San Diego, USA, among seven other cosmopolitan cities. Growth estimations for coastal ferry passengers; beach use; recreational vessels and yachts in the lncheon region are encouraging. lncheon Leisure Port development of ten amenity destinations will require equal and multidisciplinary attention to questions of tourism design and tourism impacts. Important issues will concern environmental quality, clean shipping practices, the proper balance of modem and traditional amenities and attractions, trade-offs of cultural homogeneity and cultural diversity, and creative destination branding and marketing, among others.

Augmented reality (AR) adoption has boomed globally in recent years. The prospective of AR to seamlessly integrate digital information into the actual environment has proven to be a challenge for academics and industry, as they endeavor to understand and predict the influence on users' perceptions, adoption intentions and usage. This study investigates the factors affecting consumers’ behavioral intention to adopt AR technology in shopping malls by offering the mobile technology acceptance model (MTAM).

This conceptual framework is based on mobile self-efficacy, rewards, social influence and enjoyment of existing MTAM constructs. A self-administered questionnaire, constructed by measuring questions modified from previous research, elicited 311 usable responses from mobile respondents who had recently used AR technology in shopping malls. This analysis was performed using SmartPLS3.0.

Grounded on the findings of the study, it was found that, aside from factors such as mobile usefulness, ease of use and social influence, the remaining independent variables had the most significant impact on adopting AR technologies. Considering the limitations of this study, the paper concludes by discussing the significant implications and insinuating avenues for future research.

To better investigate mobile AR app adoption in Pakistan’s shopping malls, the researchers modified the newly proposed MTAM model by incorporating mobile self-efficacy theory, social influence, rewards and perceived enjoyment. However, the extended model has not been extensively studied in previous research. This study is the first to examine the variables that affect an individual’s intention to accept mobile AR apps by using a novel extended MTAM.