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Article
Publication date: 13 June 2019

Wei Xia, Lingwen Kong, Jiahuan Zhang, Hui Hao, Yiping Wang, Xiaoqi Ni, Ming Wang and Dongmei Guo

The purpose of this study aims to modify a self-mixing laser mouse as an extremely cost-effective displacement sensor to measure the mechanical oscillation of a commercial…

Abstract

Purpose

The purpose of this study aims to modify a self-mixing laser mouse as an extremely cost-effective displacement sensor to measure the mechanical oscillation of a commercial shaker and a nano-positioning stage.

Design/methodology/approach

This kind of laser mouse, mostly consisting of a pair of vertical cavity surface emitting lasers, two photodiodes and an integrated signal processing unit, is capable of directly giving the x-axis and y-axis components of the measured vibrating displacement. Based on the laser self-mixing interference, the velocity of the object is coded into the Doppler frequency shift of the feedback light, which allows accurate determination of the vibration of the object.

Findings

A commercial shaker has been used to provide standard harmonic oscillation to test the displacement sensor. Within a vibrating frequency range of 110 Hz, the experimental results show that the micrometer scale resolution has been achieved at the velocity of up to 2 m/s, which is much improved compared with the image-based optical mouse. Furthermore, the measurements of the two dimensional displacement of a nano-positioning stage are performed as well. The minimum measurable velocity limit for this sensor has been discussed in detail, and the relative measurement error can be greatly reduced by appropriate selection of the modulation frequency of the triangular injection current.

Originality/value

These results demonstrate the feasibility of this device for the industrial vibration sensing applications.

Details

Sensor Review, vol. 39 no. 4
Type: Research Article
ISSN: 0260-2288

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Book part
Publication date: 21 December 2010

Ying Wang, Shaojing Sun and Yiping Song

Purpose – The purpose of this study was to explore Chinese consumers’ motivations for purchasing luxury products, and to unravel the interrelationships among individual…

Abstract

Purpose – The purpose of this study was to explore Chinese consumers’ motivations for purchasing luxury products, and to unravel the interrelationships among individual differences, motives, and luxury consumption.

Methodology – Data were collected from general consumers living in a large cosmopolitan city of China. A total of 473 questionnaires provided usable data and were analyzed using SPSS.

Findings – Eight motives were identified: self-actualization, product quality, social comparison, others’ influence, investment for future, gifting, special occasions, and emotional purchasing. Results showed that personal income, age, the motives of gifting, others’ influence, and product quality were significant predictors of luxury spending. Younger consumers, who did not typically make plans before buying, were more likely to buy luxury products out of emotion and less likely to do so for self-actualization or future investment.

Research limitations – The conceptualization and operationalization of some concepts used in this study (e.g., luxury brands, luxury consumption, and motives) may not be robust. Social desirability bias could comprise the validity of some research findings.

Originality – Despite a large body of research on luxury consumption, to date, most studies have been conducted in Western developed countries. Past research has showed that the symbolic and social values related to luxury consumption are deeply embedded in culture. As such, it is meaningful to investigate luxury consumption in China, whose culture is vastly different from the West.

Details

Research in Consumer Behavior
Type: Book
ISBN: 978-0-85724-444-4

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Article
Publication date: 9 February 2010

Martin Goosey

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306

Abstract

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Soldering & Surface Mount Technology, vol. 22 no. 1
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 1 June 2015

Ron Berger

This paper aims to present the evolution of Chinese business ethics and CSR policy. China currently has business ethics and corporate social responsibility (CSR) concerns…

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1242

Abstract

Purpose

This paper aims to present the evolution of Chinese business ethics and CSR policy. China currently has business ethics and corporate social responsibility (CSR) concerns primarily because its economy is in evolution. As the Chinese economy is in transition from the late 1970s from a command–Communist economy to a more hybrid system Beijing model (a system based on a capitalist market controlled through bureaucracy), much has to be understood if one wants to participate in its vast economic potential.

Design/methodology/approach

The study is based on the building of a model that depicts the evolution of business ethics in China as a base for further research.

Findings

With the rapid development of the Chinese economy, opportunities are opening up to Chinese entrepreneurs and connected officials. This has led to money worship and, in some cases, thorough unethical behavior. The uncertain and ever-changing rules of the game generate opportunity for business ethics and CSR problems. This wealth creates temptation and incentives to cut corners to get rich fast. Much research has tried to explain business ethics in China through the understanding of Guanxi (Chinese social network of reciprocal business relations common in Confucian cultures), but in my view, the evolutionary aspect of it is missing to explain the present and future situation. Whereas considerable research has dealt with the growth of Chinese industries in recent years, the key relationship between changes in its economy and shifts in Chinese business ethics has been neglected. This paper presents the evolution of Chinese business ethics and CSR policy.

Originality/value

The paper illustrates the evolution of Chinese business ethics and how one has to adapt if one wants to succeed in its ever evolving and maturing market. A model is presented that can assist in future research in the area.

Details

Journal of Chinese Economic and Foreign Trade Studies, vol. 8 no. 2
Type: Research Article
ISSN: 1754-4408

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Article
Publication date: 18 September 2019

Xiuping Hua, Yiping Huang and Yanfeng Zheng

Financial technologies, also known as “FinTech,” have brought disruptive changes to virtually every aspect of financial services and are becoming increasingly important in…

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1831

Abstract

Purpose

Financial technologies, also known as “FinTech,” have brought disruptive changes to virtually every aspect of financial services and are becoming increasingly important in the world economic system. The purpose of this paper is to proffer a bird view of some recent studies in the key research areas of FinTech, such as artificial intelligence, blockchain, crowdfunding and then to summarize the key contributions made by all the six papers in this special issue.

Design/methodology/approach

A literature review approach is adopted, and the summary shows that most types of FinTech innovations generate positive value to innovators, financial customers and the society. The current implications and future directions are explored based on theoretical and empirical analyses.

Findings

The benefits from and determinants of FinTech applications vary across different financial sectors. Together the summary of this special issue suggests that there is substantial value creation in further exploring the dynamics, mechanisms and social consequences of FinTech.

Originality/value

This study helps to extend knowledge by summarizing the current practices, proffering new insights and watching out emerging trends of financial technologies, and to shed light on a variety of subjects of interest to practitioners, academics and policy makers by suggesting for the future research topics.

Details

Industrial Management & Data Systems, vol. 119 no. 7
Type: Research Article
ISSN: 0263-5577

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Article
Publication date: 8 February 2011

Bo Wang, Fengshun Wu, Yiping Wu, Bing An, Hui Liu and Jian Zou

The purpose of this paper is to identify the solder joint with optimal mechanical properties among Cu/Sn/Cu, Ni/Sn/Ni and Cu/Sn/Ni solder joints.

Abstract

Purpose

The purpose of this paper is to identify the solder joint with optimal mechanical properties among Cu/Sn/Cu, Ni/Sn/Ni and Cu/Sn/Ni solder joints.

Design/methodology/approach

Solder joints with the same specimen shape were prepared by reflow. The microstructures were observed and analyzed by scanning electron microscopy and tensile testing was carried out to investigate the mechanical properties.

Findings

The mechanical properties of solder joint correlate closely with the intermetallic compounds (IMC) layer structure and the dissociative IMC particles in the solder bulk. Under the influence of the opposite Cu bar, the Cu/Sn/Ni has a duplex IMC layer structure at the Ni side, involving a thin Ni‐Cu‐Sn IMC layer and a faceted (Cu,Ni)6Sn5 layer. The mechanical connection of the duplex IMC layers is weak due to the pores in the layers. The Cu/Sn/Ni fractures in the IMC layers in a brittle mode under tensile testing. Comparatively, the Ni/Sn/Ni also has duplex Ni3Sn4 layers, and they connect firmly with each other. The tensile fracture of the Ni/Sn/Ni occurs in the solder bulk in a ductile mode, as well as for the Cu/Sn/Cu. Compared with the Cu/Sn/Cu solder bulk, the solder bulk of the Ni/Sn/Ni and the Cu/Sn/Ni have higher ultimate tensile strengths, because the strengthening effect of the dissociative Ni3Sn4 and (Cu,Ni)6Sn5 particles on the solder bulk is stronger than that of the Cu6Sn5 particles. Among Cu/Sn/Cu, Ni/Sn/Ni and Cu/Sn/Ni, Ni/Sn/Ni has the optimal mechanical properties.

Originality/value

The paper offers insights into the significant influence of base material matching on the microstructure and mechanical properties of solder joints.

Details

Soldering & Surface Mount Technology, vol. 23 no. 1
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 3 April 2007

Shanglong Xu, Dichen Li, Bingheng Lu, Yiping Tang, Chaofeng Wang and Zhen Wang

The purpose of this paper is to adopt rapid prototyping (RP) technology to fabricate self‐hardening calcium phosphate composite (CPC) scaffolds with a controlled internal…

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1460

Abstract

Purpose

The purpose of this paper is to adopt rapid prototyping (RP) technology to fabricate self‐hardening calcium phosphate composite (CPC) scaffolds with a controlled internal channel network to facilitate nutrient supplying and cell growth using RP technique and investigate their in vitro performance.

Design/methodology/approach

Porous scaffolds should possess branched channels to ensure uniform cell feeding and even flow of culture medium to promote uniform cell attachment and growth. A new three dimensional (3D) flow channel structure has been designed based on conversation of energy and flow. The CPC scaffold possessing such a channel network was made by indirect solid free form fabrication. Negative model of scaffold was designed by Pro/E software and its epoxy resin mold was fabricated on a sterolithography apparatus and the CPC slurry was filled in these molds. After CPC was self hardened, the mold was baked. The mold was removed by pyrolysis and then the designed scaffold was obtained.

Findings

The sizes of the fabricated scaffolds were consistent with the designed. The average compressive strength of the scaffold is approximately 6.0 MPa. Computational fluid dynamics and perfusion culture results showed that such a 3D flow channel arrangement would lead to a more uniform distribution of flow and cells and good transportation of nutrients.

Research limitations/implications

The size errors of fabricated scaffolds could not escape and perfusion methods were difficult to control.

Originality/value

The basic design concept presented showed great promise for use in bone tissue engineering and fabrication method enhanced the versatility of scaffold fabrication. The designed scaffold structure made it possible to keep integrality of the scaffold when direct observation cells inside the channel by scanning electron microscopy (SEM).

Details

Rapid Prototyping Journal, vol. 13 no. 2
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 20 September 2011

Bo Wang, Fengshun Wu, Yiping Wu, Liping Mo and Weisheng Xia

This paper aims to investigate the microstructural evolution rules of the intermetallic compound (IMC) layers in high‐density solder interconnects with reduced stand‐off…

Abstract

Purpose

This paper aims to investigate the microstructural evolution rules of the intermetallic compound (IMC) layers in high‐density solder interconnects with reduced stand‐off heights (SOH).

Design/methodology/approach

Cu/Sn/Cu solder joints with 100, 50, 20 and 10 μm SOH were prepared by the same reflow process and isothermally aged at 150°C. The IMC microstructural evolution was observed using scanning electron microscopy.

Findings

The whole IMC layer (Cu3Sn + Cu6Sn5) grew faster in the solder joints with lower SOH because of the thinner IMC layer before aging. Also, the IMC proportion increased more rapidly in solder joints with the lower SOH. In all solder joints with different SOH, the growth rates of the Cu3Sn (ϵ) layers were similar, and slowed down with increasing aging time. The Cu6Sn5 (η) was consumed by the Cu3Sn (ϵ) growth at the beginning of the aging stage; while it turned to thickening after a period of aging. Finally, the Cu6Sn5 thickness was similar in all the solder joints. It is inferred that the thickness ratio of Cu3Sn to Cu6Sn5 would maintain a dynamic balance in the subsequent aging. Based on the diffusion flux ratio of Cu to Sn at the ϵ/η interface, a model has been established to explain the microstructural evolution of IMC layers in high‐density solder interconnects with reduced SOH. In the model, interfacial reactions are mainly supposed to occur at the ϵ/η interface.

Originality/value

The findings provide electronic packaging reliability engineers with an insight into IMC microstructural evolution in high‐density solder interconnects with reduced SOH.

Details

Soldering & Surface Mount Technology, vol. 23 no. 4
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 1 December 2005

Xiang Li, Dichen Li, Bingheng Lu, Yiping Tang, Lin Wang and Zhen Wang

To fabricate the self‐hardening calcium phosphate composite scaffolds with controlled internal pore architectures using rapid prototyping (RP) techniques and investigate…

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1605

Abstract

Purpose

To fabricate the self‐hardening calcium phosphate composite scaffolds with controlled internal pore architectures using rapid prototyping (RP) techniques and investigate their in vitro bone tissue engineering responses.

Design/methodology/approach

The three‐dimensionally interconnected pores in scaffolds can facilitate sufficient supply of blood, oxygen and nutrients for the ingrowth of bone cells, tissue regeneration, and vascularization. It is essential for bone tissue engineering to provide an accurate control over the scaffolds material, porosity, and internal pore architectures. Negative image of scaffold was designed and epoxy resin molds were fabricated on sterolithography apparatus. Calcium phosphate cement slurry was cast in these molds. After self‐hardening, the molds were removed by pyrolysis and the resulting scaffolds were obtained.

Findings

Eight scaffolds with 54.45 percent porosity were tested on an Instron machine. The average compressive strength measured was 5.8±0.8 Mpa. Cytotoxicity and cell proliferation studies were conducted with rabbit osteoblast. Results showed that these scaffolds were non‐toxic and displayed excellent cell growth during the 2 weeks of in vitro culture.

Research limitations/implications

The resulting scaffolds inherited errors and defects from the molds, such as cracks and dimensional changes.

Originality/value

The present method enhances the versatility of scaffold fabrication by RP. It is capable of reproducibly fabricating scaffolds from a variety of biomaterials.

Details

Rapid Prototyping Journal, vol. 11 no. 5
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 1 December 2004

Zhongzhong Chen, Dichen Li, Bingheng Lu, Yiping Tang, Minglin Sun and Zhen Wang

A new technique based on rapid prototyping (RP) is proposed to fabricate the mould of artificial bone composed of a nontoxic soluble material. The mould has both an…

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2507

Abstract

A new technique based on rapid prototyping (RP) is proposed to fabricate the mould of artificial bone composed of a nontoxic soluble material. The mould has both an external structure that exactly coincides with the replaced natural bone and an internal 3D scaffolds simulating the bone microtubule structure. By injecting self‐setting calcium phosphate cement (CPC) with bone morphogenetic protein (BMP, a kind of bone growth factors) into the cavities of the mould, the CPC solidified and the micropores can be formed after the internal 3D scaffolds is dissolved, finally the artificial bioactive bone can be produced. This approach is better than the traditional fabrication process, which the latter method cannot fabricate an artificial bone with inter‐connective micropores so as to realize the osteo‐induction for lack of bioactivity. Through animal experiments, it shows that the simulated inter‐structure could provide artificial bone with proper voids for the growth of the bone tissue and the quick activation, and hence effectively speed up the bone growth by means of activating osteo‐conduction and osteo‐induction. So, the new method of fabricating artificial bone with biological behaviors is justified.

Details

Rapid Prototyping Journal, vol. 10 no. 5
Type: Research Article
ISSN: 1355-2546

Keywords

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