bluuebunny/crossref_metadata_2025_split huggingface dataset:
Co-creation and higher order customer engagement in hospitality and tourism services
Authors: Chathoth Prakash K. , Ungson Gerardo R. , Harrington Robert J. , Chan Eric S.W. 
Published: January 2016

Purpose
– This paper aims to present a review of the literature associated with co-creation and higher-order customer engagement concepts and poses critical questions related to the current state of research. Additionally, the paper presents a framework for customer engagement and co-creation with relevance to hospitality transactions.

Design/methodology/approach
– Earlier research on co-production, co-creation, consumer engagement and service-dominant logic are discussed and synthesized. Based on this synthesis, links and contrasts of these varying research streams are presented providing an articulation of key characteristics of each and how these might be applied within a hospitality context.

Findings
– Modalities in service transactions vary among traditional production, co-production and co-creation based on changes in attitudes, enabling technologies and the logic or ideology supporting the change. Transaction characteristics vary among manufacturing, quasi-manufacturing and services based on several key categories including differences in boundary conditions, enablers, success requirements, sustainability requirements, the dominant logic used and key barriers/vulnerabilities. When creating experiential value for consumers, firms should consider several aspects ex-ante, in-situ and ex-post of the change and during the change process.

Research limitations/implications
– Firms need to move toward higher-order customer engagement using co-creative modalities to enhance value creation. Current practices in the hotel industry may not in their entirety support this notion. Ex-ante, in-situ and ex-post considerations for creating experiential value need to be used as part of a checklist of questions for firms to pose in order to move toward managing customer experiences using the service-dominant logic as part of the firm’s orientation toward its market. This would give it the required thrust to create superior engagement platforms that use co-creative modalities while addressing the barriers to higher-order customer engagement as identified in the literature.

Originality/value
– The hospitality and tourism literature on co-creation and higher-order customer engagement is still in its infancy. A synthesis of these early studies provides support for the need for future research on co-creation that more clearly articulates the modality firms could use to move toward co-creation. This paper develops a dynamic framework using characteristics of co-creation that integrate the various stages of value creation (i.e. input, throughput and output).
Residual stresses in steel members: a review of available analytical expressions
Authors: Abambres Miguel , Quach Wai-Meng 
Published: January 2016

Purpose– Although the actual residual stress distribution in any structural steel member can be only obtained by experimental measurements, it is known to be a difficult, tedious and inefficient piece of work with limited accuracy. Thus, besides aiming at clarifying structural designers and researchers about the possible ways of modelling residual stresses when performing finite element analysis (FEA), the purpose of this paper is to provide an effective literature review of the longitudinal membrane residual stress analytical expressions for carbon steel non-heavy sections, covering a vast range of structural shapes (plates, I, H, L, T, cruciform, SHS, RHS and LSB) and fabrication processes (hot-rolling, welding and cold-forming).Design/methodology/approach– This is a literature review.Findings– Those residual stresses are those often required as input of numerical analyses, since the other types are approximately accounted for through thes-ecurves of coupons cut from member walls.Practical implications– One of the most challenging aspects in FEA aimed to simulate the real behaviour of steel members, is the modelling of residual stresses.Originality/value– Besides aiming at clarifying structural designers and researchers about the possible ways of modelling residual stresses when performing FEA, this paper also provides an effective literature review of the longitudinal membrane residual stress analytical expressions for carbon steel non-heavy sections, covering a vast range of structural shapes (plates, I, H, L, T, cruciform, SHS, RHS and LSB) and fabrication processes (hot-rolling, welding and cold-forming).
High-skilled newcomers’ identity: learners or experts?
Authors: Søreide Gunn Elisabeth 
Published: January 2016

Purpose
– The purpose of this paper is to investigate the negotiation of learner and worker identities in a group of high-skilled newcomers who participate in an introductory and mentoring programme.

Design/methodology/approach
– The paper takes the interdependence of learning, work and identity and a constructivist approach to identity as a point of departure. The design is qualitative with semi-structured interviews as the main source of data.

Findings
– For the learning potential in introductory programmes to be fulfilled, all parties involved must recognise a need for learning. This is especially important in organisations that are knowledge intensive and that demand highly skilled and competent workers, as negotiations of learner identity might be more demanding for this group of employees.

Research limitations/implications
– The current paper is situated in a specific organisational and national context, and only pays attention to some of the negotiations between expert and learner identities that are relevant if induction programmes and initiatives should be experienced as positive. Connections between identity work, learning and job performance for this group of workers should consequently be empirically investigated by a variety of methods and within several organisational and national contexts.

Practical implications
– The paper shows that it is vital for organisers and leaders to be sensitive to the significance that the identity work has for learning, when they plan, execute and evaluate induction programmes and initiatives for high-skilled and competent workers.

Originality/value
– The facilitation of job transitions and induction for high-skilled and experienced workers is underresearched, and the paper shows how identity and learning is closely connected for this group of employees.
Orientation effects for laser sintered polyamide optically translucent parts
Authors: Yuan Mengqi , Bourell David 
Published: January 2016

Purpose
– This paper aims to analyze the additive manufacturing orientation effect of laser sintered polyamide 12 (PA 12) optically translucent parts.

Design/methodology/approach
– Plates with small features, wedges and lithophanes were laser sintered on a SinterStation HiQ™ in different orientations using PA 12. Lithophane performance was assessed using a Picker 240050 X-ray view/light box. All parts were examined using stereomicroscopy to capture the small features.

Findings
– The quality of the lithophane image was substantially improved by orienting the flat plate side to the incident backlit light. Sintering in the ZX/ZY plane significantly increased the contrast and resolution compared to sintering in the XY plane. The thinnest feature thickness possible in the SinterStation HiQ is in the XY plane 0.13 mm, and it is 0.57 mm when manufacturing in the ZX/ZY plane.

Research limitations/implications
– The laser spot size and other machine parameters were not changeable, which limited the manufacturing resolution. Oblique, non-orthogonal orientations were not investigated.

Originality/value
– This is a first effort to investigate the manufacturing orientation effect of laser sintered polyamide optically translucent parts. The manufacturing resolutions on different planes were defined.
Quality improvement of optically translucent parts manufactured from LS and SL
Authors: Yuan Mengqi , Bourell David 
Published: January 2016

Purpose– The purpose of this paper is to improve the quality of additive manufactured optically translucent parts by investigating the manufacturing issues, analyzing lithophane production criteria and identifying the best translucent material and additive manufacturing (AM) technology.Design/methodology/approach– Figured lithophanes were laser sintered on a 3D Systems SinterStation® HiQ™ with varying layer thickness and plate thickness. Laser sintered (LS) polyamide (PA) 12 blanks were cyanoacrylate infiltrated and polished. Optical properties and performance were compared with the original LS blanks. Lithophanes and blanks were manufactured using 3D systems stereo lithography apparatus (SLA)® Viper ™si2 station, and optical properties and lithophane performance were compared with the LS specimens.Findings– When building in the XY plane, it is optimal to sinter with the minimum layer thickness (0.076 mm) and maximum plate thickness (5 mm). Cyanoacrylate infiltration and polishing assists in reducing the LS PA 12 plate surface roughness, but polishing does not affect the lithophane performance. The best LS candidate should have an absorption coefficient of 0.5/mm using a white light source. Improved resolution but reduced contrast was observed on stereolithography (SL) specimens compared to LS parts.Research limitations/implications– Transmittance experiments were performed on three SL parts which was not sufficient for optical property calculation. Limited literature was found for new material exploration.Originality/value– It is the first effort to study systematically quality improvement issues of LS PA optically translucent parts. A comparison is made of optical performance between parts made using LS and SL.
The use of rapid prototyping techniques (RPT) to manufacture micro channels suitable for high operation pressures and μPIV
Authors: Farré-Lladós Josep , Casals-Terré Jasmina , Voltas Jordi , Westerberg Lars G. 
Published: January 2016

Purpose
– This paper aims to present a new methodology to manufacture micro-channels suitable for high operating pressures and micro particle image velocimetry (μPIV) measurements using a rapid-prototyping high-resolution 3D printer. This methodology can fabricate channels down to 250 μm and withstand pressures of up to 5 ± 0.2 MPa. The manufacturing times are much shorter than in soft lithography processes.

Design/methodology/approach
– The novel manufacturing method developed takes advantage of the recently improved resolution in 3D printers to manufacture an rapid prototyping technique part that contains the hose connections and a micro-channel useful for microfluidics. A method to assemble one wall of the micro-channel using UV curable glue with a glass slide is presented – an operation required to prepare the channel for μPIV measurements. Once built, the micro-channel has been evaluated when working under pressure and the grease flow behavior in it has been measured using μPIV. Furthermore, the minimum achievable channels have been defined using a confocal microscopy study.

Findings
– This technique is much faster than previous micro-manufacturing techniques where different steps were needed to obtain the micro-machined parts. However, due to current 3D printers
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resolutions (around 50 μm) and according to the experimental results, channels smaller than 250-μm2 cross-section should not be used to characterize fluid flow behaviors, as inaccuracies in the channel boundaries can deeply affect the fluid flow behavior.

Practical implications
– The present methodology is developed due to the need to validate micro-channels using μPIV to lubricate critical components (bearings and gears) in wind turbines.

Originality/value
– This novel micro-manufacturing technique overcomes current techniques, as it requires less manufacturing steps and therefore it is faster and with less associated costs to manufacture micro-channels down to 250-μm2 cross-section that can withstand pressures higher than 5 MPa that can be used to characterize microfluidic flow behavior using μPIV.
Understanding the efficacy of micro-CT to analyse high speed sintering parts
Authors: Rouholamin Davood , Hopkinson Neil 
Published: January 2016

Purpose
– The purpose of this study was to assess the suitability of micro-computed tomography as a non-destructive method to investigate the morphology of nylon 12 parts produced by high-speed sintering (HSS). The investigation of the effect of changes in the lamp power on the properties of the fabricated parts was another purpose of this study.

Design/methodology/approach
– Nylon 12 parts were manufactured using HSS with various lamp powers. Morphological properties of the parts were measured using micro-computed tomography. Ultimate tensile strength, elongation at break and Young’s modulus of the prepared parts were determined and compared. The effect of lamp power on the properties of the parts was then studied.

Findings
– This paper proposes micro-computed tomography as a suitable technique to study the 3D structure of the parts produced by HSS. The effects of lamp power on the properties of the produced parts were also discussed.

Practical implications
– The findings could result in an improvement in customisation of the parts for various applications through varying the lamp power. The level of lamp power could be tailored to obtain suitable part properties for a target application.

Originality/value
– This study strengthens the fact that HSS is a promising additive manufacturing technique to produce nylon 12 parts, and the properties of the parts could be maximised using a suitable level of lamp power. The results showed that micro-computed tomography could be used as an efficient technique to investigate the morphology of the sintered parts.
A CAD and AM process for maxillofacial prostheses bar-clip retention
Authors: Daniel Steffan , Eggbeer Dominic 
Published: January 2016

Purpose
– This paper aims to present novel techniques for designing maxillofacial prostheses using computer-aided design (CAD) and additive manufacture (AM), focusing on the integration of osseointegrated retention components. A fully computer-aided approach is considered as a major step towards reducing patient consultation time and an efficient workflow.

Design/methodology/approach
– The workflow was illustrated through a phantom model. 3D laser scanning was used to capture the phantom anatomy and pre-fabricated geometric features, which enabled the implant positions to be precisely reverse engineered in the data. A novel CAD workflow was used to design the retention mechanisms and a mould. The individual components were fabricated using AM. A definitive silicone prosthesis that incorporated a bar/clip retention mechanism was then fabricated.

Findings
– The research demonstrated that retention components can be integrated into prostheses using appropriate CAD and AM technologies.

Originality/value
– This study demonstrates the feasibility of a computer-aided workflow for designing facial prostheses that incorporate osseointegrated retention mechanisms. Novel techniques were developed to: digitise abutment details using custom scanning locators; design retention components; manufacture retention components using AM; integrate retention components into a CAD and AM prosthesis mould. This overcomes limitations identified in previously published cases and demonstrated significant potential to reduce patient consultation time and create a clinically viable process.
Effect of preheat and layer thickness on selective laser melting (SLM) of magnesium
Authors: Savalani Monica Mahesh , Pizarro Jorge Martinez 
Published: January 2016

Purpose– The purpose of this paper is to investigate the effect of preheat and layer thickness in selective laser melting (SLM) of magnesium using pulse mode. Magnesium has been considered as a new generation of implant materials which are bioactive and biodegradable for orthopaedic applications.Design/methodology/approach– To produce optimal single magnesium tracks to compare the effect of layer thickness and preheat, different laser parameters were investigated. The analysis was made based on digital and electronic microscope images and mechanical measurements.Findings– Improvements in the magnesium tracks due to preheating were successfully achieved. The analysis shows better bonding to the surface. The preheated tracks present an improvement in quality surface: smoother and flatter surfaces are discovered for the low layer thicknesses. When the thickness increases, the surface was disrupted and presented high surface roughness values. These were attributed to the Marangoni convection.Originality/value– This study continues valuing the fabrication of magnesium with SLM. It shows the improvements of preheat and effect of different layer thicknesses on the part properties.
Improving the fidelity of aerodynamic probes using additive manufacturing
Authors: Jarallah Ishaq , Kanjirakkad Vasudevan P 
Published: January 2016

Purpose
– This paper aims to offer the aerodynamic testing community a new procedure for manufacturing high-quality aerodynamic probes suitable for 3D flow measurements with consistent geometry and calibration by taking advantage of the additive manufacturing technology.

Design/methodology/approach
– The design methodology combines the advantages and flexibilities of computer aided design (CAD)/computer aided manufacturing (CAM) along with the use of computational fluid dynamics to design and analyse suitable probe shapes prior to manufacturing via rapid prototyping.

Findings
– A viable procedure to design and possibly batch manufacture geometrically accurate pneumatic probes with consistent calibration is shown to be possible through this work. Multi-jet modelling prototyping methods with wax-based support materials are found to be a cost-effective method when clean and long sub-millimetre pressure channels are to be cut.

Originality/value
– Utilisation of the geometry consistency that is made possible by 3D printing technology for the design and development of pneumatic probes is described. It is suggested that the technique could lead to batch production of identical probes, thus avoiding precious time of a skilled labourer and elaborate individual calibration requirement.
Increasing plant species diversity and extreme species turnover accompany declining soil fertility along a long‐term chronosequence in a biodiversity hotspot
Authors: Zemunik Graham , Turner Benjamin L. , Lambers Hans , Laliberté Etienne 
Published: January 2016

Summary

Long‐term soil chronosequences provide natural soil fertility gradients that can be used to explore linkages between soils and plant community composition and diversity. Well‐studied forested soil chronosequences have revealed that local (α) plant diversity increases with greater soil age and declining fertility, but corresponding changes in species turnover and beta (β) diversity have not been explored, particularly in extremely species‐rich regions.

We quantified changes in plant species diversity and community composition, and identified the edaphic drivers of these changes, along a >2‐million year retrogressive dune chronosequence in the south‐west Australia biodiversity hotspot.

We found greater plant species diversity across all growth forms as soil development proceeded and concentrations of soil nutrients, particularly phosphorus (P), diminished to extremely low levels (surface soil total P concentrations of 6 mg P kg−1). Despite the high plant α diversity on older nutrient‐impoverished soils, species turnover across the chronosequence was exceptionally high when all growth forms were considered (mean of 1% of species shared between the youngest and oldest soils), and there was complete turnover of woody species along the chronosequence. Such extreme species turnover across the chronosequence reflected large changes in soil chemical properties. In addition, β diversity within individual chronosequence stages increased with declining soil fertility. Shrubs remained the dominant and most speciose growth form throughout the chronosequence.

Synthesis. The large increase in plant α diversity and the extreme species turnover associated with declining soil fertility highlight the central role of soil properties in driving plant community assembly during long‐term ecosystem development, previously only reported from comparatively species‐poor regions. Our finding that plant β diversity increased with declining soil fertility points to a novel mechanism whereby extremely low soil fertility, rather than high productivity, promotes high β diversity. These results suggest that the interaction of an exceptionally diverse plant species pool and nutrient‐impoverished soils provides the basis for the maintenance of such high β diversity at extremely low soil fertility.
Aliskiren improves endothelium‐dependent relaxation of thoracic aorta by activating PI3K/Akt/eNOS signal pathway in SHR
Authors: Gu Yue , Tang Xin , Xie Liping , Meng Guoliang , Ji Yong 
Published: January 2016

SummaryAliskiren, a direct renin blocker, has been approved for the treatment of hypertension. However, the potential role of aliskiren on vascular endothelial function in spontaneously hypertensive rats (SHR) remains unclear. In the present study, male SHRs at 12 weeks of age were orally administrated 30 mg/kg per day or 60 mg/kg per day aliskiren. After a 4‐week treatment, aliskiren showed a significant effect on the reduction of blood pressure at a dosage of 60 mg/kg per day, but not of 30 mg/kg per day. Moreover, both dosages of aliskiren improved endothelium‐dependent relaxation, reduced dihydroethidium fluorescence intensity, decreased level of malondialdehyde but heightened total antioxidant capacity and superoxide dismutase activity in thoracic aorta in SHR. Aliskiren also markedly increased expression of p85α, an important subunit of phosphatidylinositol 3 kinase (PI3K), enhancing phosphorylation of protein kinase B (Akt) at Ser473 and endothelial nitric oxide synthase (eNOS) at Ser1177, as well as cyclic guanosine‐3′5′‐monophosphate (cGMP, a sensitive index of biological activity of nitric oxide) concentration. Furthermore, both anti‐oxidative and endothelium protective effects of aliskiren were diminished when PI3K was inhibited in vivo. The data presented here indicates that, aliskiren improves endothelium‐dependent relaxation of thoracic aorta in SHR, predominantly through attenuating oxidative stress and activation of the PI3K/Akt/eNOS pathway. These data might propose novel strategies to prevent and improve vascular endothelial dysfunction.