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Article
Publication date: 20 September 2021

Osama Bedair

This paper presents a novel concept for design of concrete support system for chemical reactors used in refineries and petrochemical plants. Graphical method is described…

Abstract

Purpose

This paper presents a novel concept for design of concrete support system for chemical reactors used in refineries and petrochemical plants. Graphical method is described that can be used to size the concrete base and piling system. Recommendations are also provided to optimize the parameters required for the design. The procedure is illustrated for design of two reactor models commonly used in gas recovery units.

Design/methodology/approach

Design space representation for the foundation system is described for chemical reactors with variable heights. The key points of the design graph are extracted from the numerical finite element models. The reactor load is idealized at discrete points to transfer the loads to the piles. Bilateral spring system is used to model the soil restrains.

Findings

The graphical approach is economical and provides the design engineer the flexibility to select the foundation parameters from wide range of options.

Practical implications

The concept presented in the paper can be utilized by engineers in the industry for design of chemical reactors. It must be noted that little guidelines are currently available in practice addressing the structural design aspects.

Originality/value

A novel concept is presented in this paper based on significant industrial design experience of reactor supports. Using the described method leads to significant cost savings in material quantity and engineering time.

Details

Multidiscipline Modeling in Materials and Structures, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 16 July 2021

Cheryl Nakata and S. Cem Bahadir

The purpose of this study is to determine how design should be managed to develop truly innovative products and services. Three management levers were examined: design

Abstract

Purpose

The purpose of this study is to determine how design should be managed to develop truly innovative products and services. Three management levers were examined: design leadership, design inclusion and design thinking.

Design/methodology/approach

The study was carried out as a survey of innovation managers in the USA. The survey measures were developed from the design and innovation literature. Over 300 managers participated in the survey, and their responses were analyzed by using multiple regressions and other statistical tools.

Findings

All three aspects of design that were studied – leadership, team inclusion and thinking – were found to significantly and positively impact new product and service innovativeness. Of these factors, the most important contributor to innovativeness was design thinking, with having more than three times the impact of the other two. Also, firms that are large, publicly held and technology-intensive are on average more innovative.

Practical implications

To increase the innovativeness – or novelty, interest in and influential – of new products and services, managers should appoint designers as leaders on innovation project, include designers in development teams and above all integrate the design thinking process in organizations.

Originality/value

This study determines that design leadership, inclusion and thinking increases the innovativeness of new products and services.

Details

Journal of Business Strategy, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0275-6668

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Article
Publication date: 10 October 2021

B.N. Mohan Kumar and H.G. Rangaraju

Digital signal processing (DSP) applications such as finite impulse response (FIR) filter, infinite impulse response and wavelet transformation functions are mainly…

Abstract

Purpose

Digital signal processing (DSP) applications such as finite impulse response (FIR) filter, infinite impulse response and wavelet transformation functions are mainly constructed using multipliers and adders. The performance of any digital applications is dependent on larger size multipliers, area and power dissipation. To optimize power and area, an efficient zero product and feeder register-based multiplier (ZP and FRBM) is proposed. Another challenging task in multipliers is summation of partial products (PP), results in more delay. To address this issue, the modified parallel prefix adder (PPA) is incorporated in multiplier design. In this work, different methods are studied and analyzed for designing FIR filter, optimized with respect to area, power dissipation, speed, throughput, latency and hardware utilization.

Design/methodology/approach

The distributed arithmetic (DA)-based reconfigurable FIR design is found to be suitable filter for software-defined radio (SDR) applications. The performance of adder and multipliers in DA-FIR filter restricts the area and power dissipation due to their complexity in terms of generation of sum and carry bits. The hardware implementation time of an adder can be reduced by using PPA which is based on Ling equation. The MDA-RFIR filter is designed for higher filter length (N), i.e. N = 64 with 64 taps and this design is developed using Verilog hardware description language (HDL) and implemented on field-programmable gate array. The design is validated for SDR channel equalizer; both RFIR and SDR are integrated as single system and implemented on Artix-7 development board of part name XC7A100tCSG324.

Findings

The MDA-RFIR for N = 64 is optimized about 33% in terms of area-delay, power-speed product and energy efficiency. The theoretical and practical comparisons have been done, and the practically obtained results are compared with existing DA-RFIR designs in terms of throughput, latency, area-delay, power-speed product and energy efficiency are better about 3.5 times, 31, 45 and 29%, respectively.

Originality/value

The MDA-RFIR for N = 64 is optimized about 33% in terms of area-delay, power-speed product and energy efficiency.

Details

International Journal of Pervasive Computing and Communications, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1742-7371

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Article
Publication date: 13 October 2021

Billy Sung, Nicole Hartley, Eric Vanman and Reyhane Hooshmand

The paper aims to examine whether (1) deviation of design (i.e. objective design newness) is distinct to consumers' perception of design newness (i.e. subjective design

Abstract

Purpose

The paper aims to examine whether (1) deviation of design (i.e. objective design newness) is distinct to consumers' perception of design newness (i.e. subjective design newness) and (2) subjective design newness rather than objective design newness evokes the emotion of interest and enhances product evaluation.

Design/methodology/approach

In total five sets of quasi-experiments were conducted on the natural manipulations of design newness. Specifically, the first four studies examine consumers' perception of design newness, feeling-of-interest and product evaluation toward old and new Apple's iOS (i.e., iPhone OS) icons when a new Apple's iOS is released. The fifth study generalized the findings to the new design of XiaoMi MiPhone.

Findings

Across five quasi-experimental studies, the authors found that (1) consumers do not necessarily perceive an objectively new design to be subjectively new; (2) subjective design newness, but not objective design newness, evokes interest and (3) interest, in turn, enhances product evaluation and behavioral intention toward an innovation.

Research limitations/implications

The current finding extended the current literature on design newness by demonstrating that subjective (vs objective) design newness provides a more holistic account of consumers' interest and positive product evaluation toward the innovations.

Practical implications

The research showed that simply updating or altering the design of a product does not evoke consumers' perception of design newness and positive product evaluation. Instead, designer and managers must explore ways to evoke consumers' perception of novelty, complexity, unfamiliarity, atypicality and difference. Furthermore, the current finding demonstrated that subjective design newness can be used to evoke consumer interest and, therefore, result in positive purchase evaluation.

Originality/value

The current research is the first to examine (1) the difference between objective and subjective design newness, (2) the emotional response toward design newness and (3) the emotion of interest as a mediator that explain the strong relationship between design newness and positive product evaluation.

Details

Asia Pacific Journal of Marketing and Logistics, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1355-5855

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Article
Publication date: 18 October 2021

Nour El-Hoda Khalifeh, Rudy Youssef, Farah Fadel, Roy Khalil, Elie Shammas, Naseem Daher, Imad H. Elhajj, Thomas Irrenhauser, Michael N. Niedermeier and Christian Poss

The purpose of this paper is to detail the design and prototyping of a smart automation solution for de-strapping plastic bonding straps on shipping pallets, which are…

Abstract

Purpose

The purpose of this paper is to detail the design and prototyping of a smart automation solution for de-strapping plastic bonding straps on shipping pallets, which are loaded with multiple containers secured by a top-cover as they move on a conveyor belt.

Design/methodology/approach

The adopted design methodology to have the system perform its function entails using the least number of sensors and actuators to arrive at an economic solution from a system design viewpoint. Two prototypes of the robotic structure are designed and built, one in a research laboratory and another in an industrial plant, to perform localized cutting and grabbing of the plastic straps, with the help of a custom-designed passive localizing structure. The proposed structure is engineered to locate the plastic straps using one degree of freedom (DOF) only. An additional strap removal mechanism is designed to collect the straps and prevent them from interfering with the conveyor.

Findings

The functionality of the system is validated by performing full-process tests on the developed prototypes in a laboratory setting and under real-life operating conditions at BMW Group facilities. Testing showed that the proposed localization system meets the specified requirements and can be generalized and adapted to other industrial processes with similar requirements.

Practical implications

The proposed automated system for de-strapping pallets can be deployed in assembly or manufacturing facilities that receive parts in standard shipping pallets that are used worldwide.

Originality/value

To the best of the authors’ knowledge, this is the first mechanically smart system that is used for the automated removal of straps from shipping pallets used in assembly facilities. The two main novelties of the proposed design are the robustness of the strap localization without the need for computer vision and a large number of DOF, and the critical placement and choice of the cutting and gripping tools to minimize the number of needed actuators.

Details

Assembly Automation, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0144-5154

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Article
Publication date: 4 October 2021

Yung-Ming Cheng

The purpose of this study is to propose an integrated post-adoption model based on expectation-confirmation model (ECM) and flow theory to examine whether gamification and…

Abstract

Purpose

The purpose of this study is to propose an integrated post-adoption model based on expectation-confirmation model (ECM) and flow theory to examine whether gamification and interface design aesthetics as antecedents to students' beliefs can affect their continuance intention of massive open online courses (MOOCs) and perceived impact on learning.

Design/methodology/approach

Sample data for this study were collected from students enrolled in a comprehensive university in Taiwan. A total of 600 questionnaires were distributed in the campus, and 318 (53.0%) useable questionnaires were analyzed using structural equation modeling in this study.

Findings

This study's results verified that students' perceived gamification and interface design aesthetics of MOOCs positively affected their perceived usefulness, confirmation and flow experience elicited by MOOCs, and these in turn directly or indirectly led to their satisfaction, continuance intention of MOOCs and perceived impact on learning. Essentially, the results strongly support the research model with all hypothesized links being significant.

Originality/value

It should be particularly noticed that this study contributes to the application of capturing both ECM and flow experience (i.e. an intrinsic motivator) for completely explaining students' perceived gamification and interface design aesthetics as external variables to their continuance intention of MOOCs and perceived impact on learning, and this study's empirical evidence can further shed light on the possible formulation of MOOCs success.

Content available
Article
Publication date: 6 October 2021

Jian Liu, Mengyao Xu, Xi Wenxiong, Jiawen Song, Shibin Luo and Bengt Ake Sunden

Endwall film cooling protects vane endwall by coolant coverage, especially at the leading edge (LE) region and vane-pressure side (PS) junction region. Strong flow…

Abstract

Purpose

Endwall film cooling protects vane endwall by coolant coverage, especially at the leading edge (LE) region and vane-pressure side (PS) junction region. Strong flow impingement and complex vortexaa structures on the vane endwall cause difficulties for coolant flows to cover properly. This work aims at a full-scale arrangement of film cooling holes on the endwall which improves coolant efficiency in the LE region and vane-PS junction region.

Design/methodology/approach

The endwall film holes are grouped in four-holes constructal patterns. Three ways of arranging the groups are studied: based on the pressure field, the streamlines or the heat transfer field. The computational analysis is done with the k-ω SST model after validating the turbulence model properly.

Findings

By clustering the film cooling holes in four-holes patterns, the ejection of the coolant flow is stronger. The four-holes constructal patterns also improve the local coolant coverage in the “tough” regions, such as the junction region of the PS and the endwall. The arrangement based on streamlines distribution can effectively improve the coolant coverage and the arrangement based on the heat transfer distribution (HTD) has benefits by reducing high-temperature regions on the endwall.

Originality/value

A full-scale endwall film cooling design is presented considering interactions of different film cooling holes. A comprehensive model validation and mesh independence study are provided. The cooling holes pattern on the endwall is designed as four-holes constructal patterns combined with several arrangement choices, i.e. by pressure, by heat transfer and by streamline distributions.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0961-5539

Keywords

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Article
Publication date: 11 October 2021

Ibrahim Yahaya Wuni and Geoffrey Qiping Shen

The factory production stage constitutes the bridge in the supply chains of modular integrated construction (MiC) projects. It embodies the fundamental differences between…

Abstract

Purpose

The factory production stage constitutes the bridge in the supply chains of modular integrated construction (MiC) projects. It embodies the fundamental differences between MiC and site-based construction. However, there is a poverty of knowledge of the uncertainties and risk events at the production stage. This study aims to investigate the critical production risk factors (PRFs) for MiC projects.

Design/methodology/approach

Comprehensive literature research and expert review identified and validated 22 candidate PRFs for MiC projects. A structured questionnaire survey was then used to gather opinions of domain experts in 18 countries on the relative impact of the validated PRFs for MiC projects. The collected data were analysed using multiple statistical techniques.

Findings

Statistical analysis identified nine critical PRFs for MiC projects. The top five include dimensional conflicts between modules during production; delays in production materials procurement; defective design; design information gap between designer and manufacturer; and limited capacity of manufacturers.

Originality/value

The study addressed the gap associated with identifying critical risk factors peculiar to the factory production stage of MiC projects. Its novelty lies in providing an opposite assessment of severities and prioritization of critical PRFs for MiC projects. The prioritized critical PRFs for MiC projects may inform resource allocation. Thus, it provides valuable information to MiC production specialists and project managers in their production risk planning and management strategies. The identified PRFs contribute to the theoretical checklist of MiC supply chain risk factors and may assist practitioners in assessing the severity levels of the PRFs of their MiC projects.

Details

Journal of Facilities Management , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1472-5967

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Article
Publication date: 19 October 2021

Afred Suci, Sri Maryanti, Hardi Hardi and Nining Sudiar

This paper investigates how to design traditional ready-to-eat food packaging by manipulating its shape, font and slogan to promote consumer buying intention and…

Abstract

Purpose

This paper investigates how to design traditional ready-to-eat food packaging by manipulating its shape, font and slogan to promote consumer buying intention and willingness to pay (WTP).

Design/methodology/approach

Two package designs, interplaying the square shapes (vertical vs horizontal), font formality (formal vs less formal/casual) and slogans (ethno-positioning vs short and catchy), were created and tested in an online experiment with 483 participants.

Findings

The results revealed that the differed package designs elicited relatively equal levels of attractiveness to consumers and their buying intentions. However, the designs significantly differentiated consumers' WTP. The results further show the significant direct and indirect effects on WTP of packaging attractiveness when it is moderated by package designs and mediated by buying intention. However, the varied package designs did not have significant direct or indirect impacts on WTP when mediated by packaging attractiveness and buying intention.

Practical implications

The vertical square-shaped packaging, written in a less formal font and highlighting a short and catchy slogan, is more financially promising for marketers to get a better price for local food products perceived as hedonic and bought impulsively on casual occasions. Furthermore, besides prominent package design elements such as font, color, size, material and picture, packaging designers or marketing practitioners should consider other supporting factors, such as shelf efficiency.

Originality/value

This study complements existing studies of “cue utilization theory” and “packaging design theory” by demonstrating the importance of extrinsic packaging cues, such as shape, font style and slogan, in improving consumers' WTP for traditional food products. The study also fills some gaps in the literature by exploring the direct, mediating and moderating relationships between package design, packaging attractiveness, buying intention and WTP, especially in an emerging market such as Indonesia.

Details

Asia Pacific Journal of Marketing and Logistics, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1355-5855

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Article
Publication date: 5 October 2021

Yonghua Li, Hao Yin and Qing Xia

This study aims to research the influence of non-probabilistic design variables on interval robust optimization of electric multiple units (EMU) brake module, therefore…

Abstract

Purpose

This study aims to research the influence of non-probabilistic design variables on interval robust optimization of electric multiple units (EMU) brake module, therefore obtain the reasonable of design variables of the EMU brake module.

Design/methodology/approach

A robust optimization model of the EMU brake module based on interval analysis is established. This model also considers the dimension tolerance of design variables, and it uses symmetric tolerance to describe the uncertainty of design variables. The interval order relation and possibility degree of interval number are employed to deal with the uncertainty of objective function and constraint condition, respectively. On this basis, a multiobjective robust optimization model in view of interval analysis is established and applied to the robust optimization of the EMU brake module.

Findings

Compared with the traditional method and the method proposed in the reference, the maximum stress fluctuation of the EMU brake module structure is smaller after using the method proposed in this paper, which indicates that the robustness of the maximum stress of the structure has been improved. In addition, the weight and strength of the structure meet the design requirements. It shows that this method and model introduced in this research have certain feasibility.

Originality/value

This study is the first attempt to apply the robust optimization model based on interval analysis to the optimization of EMU structure and obtain the optimal solution set that meets the design requirements. Therefore, this study provides an idea for nonprobabilistic robust optimization of the EMU structure.

Details

Multidiscipline Modeling in Materials and Structures, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1573-6105

Keywords

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