•Morphology of Service Failure and Recovery in B2B markets is analyzed.•Eight dimensions and 62 variants are identified.•418 research gaps identified using a Variants Intersection Matrix.•Service ...failure modes and combinations of recovery mechanisms are highlighted.
The existing body of research on service failures and recoveries primarily deals with business-to-consumer markets, with relatively limited and scattered research on business-to-business (B2B) markets. The purpose of this paper is to review the existing literature on these failures and recoveries in B2B markets, conceptualize and develop a morphological analysis (MA) framework, and identify research gaps that point to future research possibilities. We present an MA framework based on a literature review of 114 papers on the ABDC/ABS/ Clarivate Analytics list. The MA framework, constructed with eight dimensions and 62 variants, reveals 418 distinct research gaps as an upper bound of opportunities for future research. The paper concludes by discussing the implications for future research.
The predominant focus of academic research on the sharing economy has been on Airbnb and Uber; to this extent, the diversity of business models ascribed to the sharing economy has not yet been ...sufficiently explored. Greater conceptual and empirical research is needed to increase understanding of business models in the sharing economy, particularly attributes that deliver on its purported sustainability potential.
We aimed to elaborate an improved sharing economy business modelling tool intended to support the design and implementation of sharing economy business models (SEBMs) with improved sustainability performance.
We used a structured approach to business modelling, morphological analysis, to articulate relevant business model attributes. Our analysis was informed by a narrative literature review of business and platform models in the sharing economy. We also iteratively tested, refined, and evaluated our analysis through three structured opportunities for feedback.
The output of the morphological analysis was a sharing economy business modelling tool for sustainability, with stipulated preconditions and descriptions of all business model attributes.
The sharing economy is not sustainable by default, so we must be strategic and deliberate in how we design and implement SEBMs. The sharing economy business modelling tool should be of interest not only to researchers and practitioners, but also to advocacy organisations and policymakers who are concerned about the sustainability performance of sharing platforms.
•The sharing economy is not sustainable by default.•Reviews existing sharing economy business model conceptualisations.•Proposes preconditions to scope business and consumption practices for improved sustainability performance by sharing platforms.•Conducts morphological analysis depicting and describing all relevant business model attributes.•Presents a sharing economy business modelling tool to overcome the design-implementation gap of sustainable business models.
This paper presents a novel signal processing scheme, bandwidth empirical mode decomposition, and adaptive multiscale morphological analysis (BEMD-AMMA) for early fault diagnosis of rolling bearings. ...In this scheme, we propose a bandwidth based method to select the best envelope interpolation method. First, multiple envelope algorithms are defined and separately subtracted from the original data to obtain the preintrinsic mode functions (PIMFs). Second, an IMF with the smallest frequency bandwidth is selected to be the optimal IMF (OIMF). Third, this OIMF is subtracted from the original signal, and then repeat the sifting process until the residual is a constant or monotonic. Since the OIMF has the smallest frequency bandwidth, the mode mixing phenomenon can be significantly weakened. After that the OIMFs with clear fault information are used to construct the main component of the original signal. Then, the AMMA is introduced to demodulate the constructed main component. Simulation and experimental vibration signals are employed to evaluate the effectiveness of the proposed method. Results show that the proposed method outperforms EMD-AMMA, ensemble empirical mode decomposition-AMMA, and generalized empirical mode decomposition-empirical envelope demodulation in detecting early inner race fault.
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•A rapid in-situ pre-coated dynamic membrane formation method was developed.•PC-AnDMBR showed a slightly better pollutants removal compared to SF-AnDMBR.•Stable performance with low ...TMP increasing rate (0.07 kPa/d) was obtained in PC-AnDMBR.•Gel layer rather than cake layer contributed more to the total filtration resistance.•Gel layer showed the properties of more organics accumulation and lower porosity.
Precoated dynamic membranes (PCDM), commonly formed by retaining external particles on coarse supporting meshes, can accelerate dynamic membrane (DM) formation, change the DM structure, and enhance its filtration performance. An in-situ rapid PCDM formation method via short-time and high-flux initial filtration (at 380 L/m2·h flux for 0.25 min) is proposed using anaerobic sludge as a precoating material. A precoated anaerobic dynamic membrane bioreactor (PC-AnDMBR) was operated in parallel with a self-forming AnDMBR (SF-AnDMBR) to treat domestic wastewater. Extremely low rates of transmembrane pressure (TMP) increase of 0.05 and 0.07 kPa/d were obtained during the long-term operation of the SF-AnDMBR and PC-AnDMBR, respectively. Furthermore, the PC-AnDMBR and SF-AnDMBR showed stable effluent turbidity (27.1 ± 9.44 NTU and 31.35 ± 15.96 NTU, respectively) and satisfactory COD removal (83% and 78%, respectively), which were attributed to the small pore size (<2 μm) of the DM layers. The PCDM and self-forming dynamic membrane (SFDM) with a thickness of 0.7 mm were further characterized as cake and gel layers, whereas the gel layer thickness within the PCDM was higher than that of the SFDM (0.6 mm vs. 0.2 mm). In addition, the porosities of the gel layers (2.87% and 2.95%) were lower than those of the cake layers (3.58% and 3.48%) for the PCDM and SFDM, respectively. Therefore, the compact gel layer, with more accumulated organics, contributed to over 78% of the total filtration resistance. These findings provide new insights into the mechanisms of PCDM formation and the application of AnDMBRs in wastewater treatment.
This study aims to investigate the use of morphological analysis strategy in enhancing the student’s vocabulary acquisition and reading comprehension. The research was experimented in the English ...Department at Universitas Muhammadiyah Parepare, with a total sample of 28 students. This study was pre-experiment research with a pretest-posttest design. The result of this study indicated that: (1) in teaching vocabulary through vocabulary analysis strategy, there are significant differences between the mean score of the pre-test (58.57) and the mean score of the post-test (84.28). Besides that, the result of the t-test calculation shows that the t-test value (7.75) is higher than the t-table value (2.052) at a significance level 0.05 from df = 27. (2) In teaching reading comprehension through vocabulary analysis strategy, there are also significant differences between the mean score of the pre-test (54.64) and the mean score of the post-test (80.51). In addition, the result of the t-test calculation shows that the t-test value (9.75) is higher than the t-table value (2.052) at the significance level 0.05 from df = 27. Thus, the student’s vocabulary acquisition and reading comprehension significantly improve after they are taught using the morphological analysis strategy.
Purpose
The purpose of this paper is to review the existing literature on Lean Six Sigma (LSS) for services, construct a morphological analysis (MA) framework and identify research gaps to point to ...future research possibilities and priorities.
Design/methodology/approach
The MA framework is based on literature review of 175 papers published from 2003 to 2015, across 67 journals recognised by Scopus or ABS Academic Journal Quality Guide 2015. A three-phased methodology is used by the authors, with Phase1 featuring a five-stage systematic review protocol to identify relevant journal papers for review; Phase2 presenting a framework for classifying the reviewed papers in terms of their fundamental, methodological, chronological and sector-wise orientations; and Phase3 constructing an MA framework on the classified papers and identifying the research gaps.
Findings
The MA framework constructed based on six dimensions, namely, organizational context of applications, desired outcomes, implementation systems, LSS tools and techniques, integration with other management philosophies and evaluation methods, involving 40 focused themes, has revealed 355 distinct research gaps as opportunities for future research.
Practical implications
This paper confirms the existence of substantial scope and points to specific topics for further research in the area of LSS for services. The findings demonstrate the gaps in academic research on the subject. In addition, the study also helps organisational leaders and practitioners to look at LSS from a holistic perspective in the services context.
Originality/value
The MA framework of the existing literature on LSS for services presents a unique, systematic effort to identify research opportunities. In addition, a five-stage systematic review protocol is proposed in this paper. This could be valuable to researchers and practitioners in enabling them to systematically review the literature on research subjects of interest to them.
In the present article, the pure PbS and different concentrations of Gd doped PbS (Gd:PbS) films were developed using the spray pyrolysis route by growing thin films on the glass substrate. The ...estimated crystallite sizes were found from 15.5 to 20.8 nm for as-deposited films. The spherical shape morphology of grains was observed by FESEM. The obtained average grain sizes varied from 52.8 to 108.2 nm were obtained from the grain size distributions for 0.0, 0.5, 1.5, and 2.5 wt % Gd: PbS films, respectively. Extinction coefficients of as-deposited films were measured from 0.04 to 0.12 in the range of wavelength 200–2500 nm. Refractive indices of films were obtained from 5.4 to 1.22 in range of 200–2500 nm wavelength. The band gaps of 2.75, 2.64, 2.45, and 3.10 eV for 0.0, 0.5, 1.0 and 2.5 wt % Gd thin films were estimated using Tauc's relation respectively. The values of the dielectric constant, dielectric loss, and optical conductivity were recorded in the range of 1.32–29.6, 0.30–0.61, and 2.34 × 1014–3.08 × 1013 between 200 and 2500 nm wavelengths for as-deposited thin films respectively. The optimum values of linear susceptibility, non-linear susceptibility and refractive index were recorded in the range of 1.23–2.93, 5.21 × 10−10 - 120 × 10−10, 3.54 × 10−9 – 74.2 × 10−9 (esu) between 1.46 and 0.52 eV respectively for as-deposited thin films. The Gd: PbS thin films improve the physical properties and therefore, it becomes suitable candidature for the applications in optoelectronic devices.
•Fabrication of PbS and Gd:PbS films on glass by nebulizer spray pyrolysis is reported.•Spherical grains with highly packed structure of PbS and Gd:PbS thin films.•Homogeneous doping of Gd in ZnO was detected by EDX/SEM mapping.•The band gaps is noticed in range of 2.45–3.10 eV for PbS and Gd:PbS thin films.•Values of linear/non-linear susceptibilities, and non-linear refractive index of Gd: PbS decreases as compared to pure.
A microwave combustion method was used to synthesize Cu1-xZnxFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) nanoparticles. The synthesized Zn-doped CuFe2O4 nanoparticles were characterized by techniques ...such as X-ray diffraction, high-resolution scanning electron microscopy, UV–visible diffuse reflectance spectroscopy, photoluminescence spectroscopy, Fourier transform IR spectroscopy, and vibrating sample magnetometry. X-ray diffraction and Fourier transform IR spectroscopy results confirmed the formation of Cu1-xZnxFe2O4(x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) nanoparticles. The crystallite size and lattice parameter were determined as 15–19 nm and 8.319–8.400 Å, respectively. High-resolution scanning electron microscopy revealed the presence of agglomerated spherical particles of Cu1-xZnxFe2O4. Elemental mapping of pure and Zn-doped CuFe2O4 was done by energy-dispersive X-ray analysis. The band gap was calculated with the Kubelka-Munk function and was found to lie in the range from 2.30 to 2.51 eV. Finally, M-H curves were plotted and the magnetic properties, such as coercivity, remanent magnetization, and saturation magnetization, were determined.
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•Zinc-doped copper ferrite was synthesized by a microwave combustion method.•Structural, morphological, optical, vibrational, and magnetic properties are studied.•Zinc-doped copper ferrite nanoparticles exhibit ferromagnetic behavior.
This paper examines the urban character of Chinatown districts around the world, as a key example of an urban ethnic enclave, focusing on four large Chinatowns in San Francisco, Yokohama, Melbourne ...and Sydney. It advances knowledge about the spatial elements that define urban districts, a concept pioneered by Kevin Lynch. Existing literature on Chinatowns primarily explores the historically changing relationships between their Chinese migrant communities and their host cities, or the visual and physical character of individual cases. This paper develops new insights into how the built forms of these urban districts are similar to or different from their surroundings and from each other. It employs a methodology that combines space syntax analysis of street networks, morphological analysis of built form, land-use analysis, and mapping of visual character from street level. It examines the Chinatown districts' spatial extents in terms of contrasts between their spatial attributes and their wider urban surroundings. The findings develop a new taxonomy of Chinatowns based on their urban spatial characteristics.
•Develops new methods to map and analyse the spatial character of urban districts•Compares Chinatowns' built form and street networks to their urban surroundings•Analyses Chinatowns' varying accessibility within the overall urban street network•Reveals how contemporary Chinatowns extend beyond their traditional boundaries•Compares four case study cities to identify a new spatial taxonomy of Chinatowns
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