Search results

This paper aims to exploit shape-memory polymers as self-healable materials. The underlying mechanism involved the thermal transitions as well as the enrichment of the healing reagents and the closure of the crack surfaces due to shape recovery. The multi-stimuli-triggered shape memory composite was capable of self-healing under not only direct thermal but also electrical stimulations.

The shape memory epoxy polymer composites comprising the AgNWs and poly (ε-caprolactone) were fabricated by dry transfer process. The morphologies of the composites were investigated by the optical microscope and scanning electron microscopy (SEM). The electrical conduction and the Joule heating effect were measured. Furthermore, the healing efficiency under the different stimuli was calculated, whose dependence on the compositions was also discussed.

The AgNWs network maintained most of the pathways for the electrons transportation after the dry transfer process, leading to a superior conduction and flexibility. Consequently, the composites could trigger the healing within several minutes, as applied with relatively low voltages. It was found that the composites having more the AgNWs content had better electrically triggered performance, while 50 per cent poly (ε-caprolactone) content endowed the materials with max healing efficiency under thermal or electrical stimuli.

The findings may greatly benefit the application of the intelligent polymers in the fields of the multifunctional flexible electronics.

Most studies have by far emphasized on the direct thermal triggered cases. Herein, a novel, flexible and conductive shape memory-based composite, which was capable of self-healing under the thermal or electrical stimulations, has been proposed.

Despite the potentially vital implications of time pressure for group performance in general and team effectiveness in particular, research has traditionally neglected the study of time limits and group effectiveness. We examine the small, but growing, body of research addressing the effect of time pressure on group performance and introduce our Attentional Focus Model of group effectiveness (Karau & Kelly, 1992). We examine recent research on the utility of the model and identify selected implications of the model for how time pressure may interact with other factors such as task type, group structure, and personality to influence team performance. Finally, we discuss methodological issues of studying attention, interaction processes, and team performance.

This study aims to investigate the effects of visitors’ dietary habits on their acceptance of local food from the perspective of positive (e.g. local food involvement) and negative (e.g. food neophobia) food-related personality traits.

A survey was conducted on visitors to the Slow Food Festival in Taitung, Taiwan. A total of 327 valid questionnaire responses were collected and structural equation modeling was used to conduct path analyzes.

The analysis results supported all hypotheses. Food neophobia plays a key factor in moderating roles.

This study contributes to the literature by integrating positive and negative perspectives of food-related personality traits. In addition, this study proposes that food neophobia plays a moderating role in food choice and behavioral decisions.

The purpose of this paper is to offer a preliminary case study exploration of the corporate social responsibility issues being addressed and reported by a number of the UK's major gambling operators.

The paper begins with a short discussion of the characteristics and origins of CSR and this is followed by a brief outline of the structure of the gambling industry within the UK. The paper draws its empirical material from the CSR reports and information posted on the world wide web by a number of the major gambling operators and by a small number of organisations concerned with the regulation and social impact of gambling.

The findings reveal that there are substantial variations in the nature and the extent of reporting. Four companies produced CSR reports while others produced more limited information confined largely to responsible gambling. More specifically, the paper focuses upon four sets of CSR issues namely those relating to the marketplace; the workplace; the environment; and the community and then provides some reflections on these issues.

CSR within the UK's gambling industry has received relatively little attention from academics but the paper suggests a number of fertile grounds for future enquiry and research. The paper offers a preliminary exploration of CSR issues as reported on the world wide web and more in depth work will be needed before more definitive conclusions can be drawn.

The paper provides an accessible review of the CSR issues and agendas being reported by some of the UK's major gambling operators and as such it will interest academics and practitioners working on and in the gambling industry and those professionals who work with the industry.

Despite persistent levels of participation in cycling, little research has been undertaken in the context of competitive cycling event management and marketing. This study explored participant preferences using conjoint measurement and plausible market segmentations. Results of the survey conducted at three southeastern US cycling events (N=199) suggest that travel distance has primacy across nearly all segment groups and differences in recreational specialisation in cycling are reflected among other preferred event attributes.

The purpose of this paper is to consider some of the issues of vulnerability and risk, mitigation, adaptation and the adaptive capacity of events. Given the significance of events to community, society and the economy, it seems imperative that the risks of any potential negative effects of climate change on this sector are understood, and that the capacity of events to adapt to and mitigate climate change is identified.

This exploratory conceptual paper considers some of the issues of vulnerability and risk, mitigation, adaptation and the adaptive capacity of events, and highlights the fact that different types of events are likely to be affected unequally by climate change.

The paper finds that different types of events are likely to be impacted in different ways by climate change. It also concludes that smaller, community events and larger hallmark events are likely to be most seriously affected by climate change, as they are types of events which rely on specific locations and venues.

The limitations are those of a conceptual paper – although the empirical research on climate change and tourism may reflect the situation for the events industry, this has not yet been tested. Future research should test the propositions in this paper.

The paper suggests strongly that the events industry should incorporate strategies for adapting to climate change impacts into its policy and planning. Some of the likely climate change impacts are identified in the paper, along with potential adaptation solutions.

This topic has not yet been addressed in the academic literature and therefore the paper represents an important step in the understanding of climate change. The paper has academic value as a platform to underpin future research and practical value for event organisers planning for an uncertain future.

Solar cells could make textile-based wearable systems energy independent without the need for battery replacement or recharging; however, their laundry resistance, which is prerequisite for the product acceptance of e-textiles, has been rarely examined. This paper aims to report a systematic study of the laundry durability of solar cells embedded in textiles.

This research included small commercial monocrystalline silicon solar cells which were encapsulated with functional synthetic textile materials using an industrially relevant textile lamination process and found them to reliably endure laundry washing (ISO 6330:2012). The energy harvesting capability of eight textile laminated solar cells was measured after 10–50 cycles of laundry at 40 °C and compared with light transmittance spectroscopy and visual inspection.

Five of the eight textile solar cell samples fully maintained their efficiency over the 50 laundry cycles, whereas the other three showed a 20%–27% decrease. The cells did not cause any visual damage to the fabric. The result indicates that the textile encapsulated solar cell module provides sufficient protection for the solar cells against water, washing agents and mechanical stress to endure repetitive domestic laundry.

This study used rigid monocrystalline silicon solar cells. Flexible amorphous silicon cells were excluded because of low durability in preliminary tests. Other types of solar cells were not tested.

A review of literature reveals the tendency of researchers to avoid standardized textile washing resistance testing. This study removes the most critical obstacle of textile integrated solar energy harvesting, the washing resistance.

A review on additive manufacturing (AM) of shape memory polymer composites (SMPCs) is put forward to highlight the progress made up to date, conduct a critical review and show the limitations and possible improvements in the different research areas within the different AM techniques. The purpose of this study is to identify academic and industrial opportunities.

This paper introduces the reader to three-dimensional (3 D) and four-dimensional printing of shape memory polymers (SMPs). Specifically, this review centres on manufacturing technologies based on material extrusion, photopolymerization, powder-based and lamination manufacturing processes. AM of SMPC was classified according to the nature of the filler material: particle dispersed, i.e. carbon, metallic and ceramic and long fibre reinforced materials, i.e. carbon fibres. This paper makes a distinction for multi-material printing with SMPs, as multi-functionality and exciting applications can be proposed through this method. Manufacturing strategies and technologies for SMPC are addressed in this review and opportunities in the research are highlighted.

This paper denotes the existing limitations in the current AM technologies and proposes several directions that will contribute to better use and improvements in the production of additive manufactured SMPC. With advances in AM technologies, gradient changes in material properties can open diverse applications of SMPC. Because of multi-material printing, co-manufacturing sensors to 3D printed smart structures can bring this technology a step closer to obtain full control of the shape memory effect and its characteristics. This paper discusses the novel developments in device and functional part design using SMPC, which should be aided with simple first stage design models followed by complex simulations for iterative and optimized design. A change in paradigm for designing complex structures is still to be made from engineers to exploit the full potential of additive manufactured SMPC structures.

Advances in AM have opened the gateway to the potential design and fabrication of functional parts with SMPs and their composites. There have been many publications and reviews conducted in this area; yet, many mainly focus on SMPs and reserve a small section to SMPC. This paper presents a comprehensive review directed solely on the AM of SMPC while highlighting the research opportunities.

Knowledge management (KM) has been gradually established as a strong methodology to support business viability, competitiveness and growth; however, the lack of maturity is obvious, as evidenced by divergent points of view in critical sub‐domains of the related theory and practice, such as the spectrum of processes and the clusters of tactics scheduled to underpin them. The systems thinking logic, the discipline for seeing structures underlying complex phenomena, is perceived as a promising direction for consolidating the various approaches and developing a holistic KM paradigm. Through the integration of the fragmented landscape of knowledge management on a transparent and concrete framework based on cause‐effect relationships, not only the underlying theoretical assumptions are clarified and subjected to further analysis at a strategic level, but also practical issues concerning planning and decision making become less complicated, increasing effectiveness.

The purpose of this paper is to provide a review of recent systematic and comprehensive advancement in electrospun polymer fiber and their composites with shape memory property.

The nanofiber manufacture technique is initially reviewed. Then, the influence of electrospinning parameters and actuation method has been discussed. Finally, the study concludes with a brief review of recent development in potential applications.

Shape memory polymer (SMP) nanofibers are a type of smart materials which can change shape under external stimuli (e.g. temperature, electricity, magnetism, solvent). In general, such SMP nanofibers could be easily fabricated by mature electrospinning technique. The nanofiber morphology is mainly affected by the electrospinning parameters, including applied voltage, tip-to-collector distance, viscosity of solution, humidity and molecular weight. For actuation method, most SMP nanofibers and their composites can change their shapes in response to heat, magnetic field or solvent, while few can be driven by electricity. Compared with the block SMPs, electrospun SMP nanofibers’ mat with porosity and low mechanical property have a wide potential application field including tissue engineering, drug delivery, filtration, catalysis.

This paper provides a detailed review of shape memory nanofibers: fabrication, actuation and potential application, in the near future.