bluuebunny/crossref_metadata_2025_split huggingface dataset:
Constrained economic design of S control charts for random process shifts
Authors: Castagliola Philippe , Celano Giovanni , Costa Antonio , Fichera Sergio 
Published: March 2011

PurposeThe use of control charts to monitor a product quality characteristic requires the selection of their design parameters. To select feasible design parameters, the constraints related to the inspection resources available at the workstation, its configuration and the process operating parameters should be taken into account. The aim of this research is to discuss the design of Shewhart and EWMA control charts monitoring dispersion in the presence of these constraints and for processes characterized by a random shift size.Design/methodology/approachIn this paper the design of the investigated control charts has been intended in a broader sense as the design of a local inspection procedure constrained by a set of resource/environmental process factors characterizing the workstation configuration. An economic objective pursuing the minimization of the total inspection cost has been considered.FindingsConstraining the design of a control chart is an essential issue to find chart design parameters that can be effectively implemented by quality practitioners. The influence of the process‐operating parameters has been modelled and some guidelines have been suggested through the use of contour plots.Originality/valueThe economic design of control charts has been scarcely implemented by quality practitioners due to the difficulty of adapting them to the multifaceted complexity and constraints present within manufacturing environments. This paper tries to contribute to the existing literature by improving the available mathematical models through modelling the actual workstation configuration and resource allocation; furthermore, for random shift processes it investigates the performance of the Shewhart and EWMA control charts monitoring process dispersion.
Effect of lauric acid‐based Al‐Zr coupling agent on the surface modification of long afterglow phosphors
Authors: Guo B. , Yin P. , Xu J. , Yi F.C. , Dai Y. , Gao Y. , Guo F.Q. 
Published: March 2011

PurposeThe purpose of this paper is to report on a study which aims to improve the compatibility of the long afterglow phosphors SrMgAl4O8:Eu2+, Dy3+with organic matrix, including its water resistance.Design/methodology/approachThe phosphors were modified by the lauric acid‐based Al‐Zr coupling agent (CA). Then, they were characterised by attenuated total reflection fourier transform infrared (ATR‐FTIR), pH and electric conductivity in water, scanning electron microscope (SEM), contact angle and fluorescence decay curves before and after modification.FindingsThe pH and electric conductivity displayed the improved water resistance, as the Al‐Zr CA addition increased, and the minimum contact angle with resin decreased from 68.3 to 40.3°C, which showed that the compatibility with organic matrix was enhanced significantly. The afterglow luminous properties were unimpaired.Research limitations/implicationsThe researchers are encouraged to test the proposed method and enhance the compatibility further.Practical implicationsThis method will extend the applications of phosphors in the paint, coatings, ink and plastics industry.Originality/valueThis paper introduces the lauric acid‐based Al‐Zr CA to modify the luminescent pigments of long afterglow phosphors; it can be also applied to other inorganic powders.
Novel methods to fabricate PbS/poly(p‐phenylene vinylene) composite fibres
Authors: Chen J. , Yang P. , Huang Z. , Wang C. , Wang C. 
Published: March 2011

PurposeThe purpose of this paper is to investigate three preparation processes and the photoluminescent (PL) properties of PbS/poly(p‐phenylene vinylene) (PPV) composite fibres.Design/methodology/approachBy the combination of electrospinning technology, chemical vapour deposition and chemical liquid deposition, PbS/PPV composite nanofibres were prepared by three simple methods. The morphologies of the fibres and the PL properties were researched with the transmission electron microscopy (TEM) and the eclipse fluorescence spectrophotometer.FindingsBy different synthetic methods, the dispersion morphologies of PbS nanoparticles and the PL properties of their respective PbS/PPV composite fibres were different. Moreover, the effects of PbS nanoparticles on the luminescence quenching of the PPV were observed in all the synthesised PbS/PPV composite fibres, respectively.Research limitations/implicationsThe dispersion morphologies of PbS nanoparticles were not uniform enough.Practical implicationsA new method was used for preparing nanoparticles/polymer composite fibres.Originality/valueThe combination of electrospinning technology and chemical liquid deposition was used for the first time to fabricate the sulfide/polymer composite fibres. In addition, we hope that the results obtained here will provide some useful evidences for the interaction mechanism between IV‐VI group semiconductors and conjugated polymers, and the prepared composite fibres will have applications in the nano‐optoelectronic field.
Acid corrosion inhibition of copper by mangrove tannin
Authors: Shah A.M. , Rahim A.A. , Yahya S. , Raja P.B. , Hamid S.A. 
Published: March 2011

PurposeThe purpose of this paper is to evaluate the corrosion inhibition potential of mangrove (Rhizopora apiculata) tannin in hydrochloric acid medium on copper with the view of developing a natural corrosion inhibitor.Design/methodology/approachThe mangrove tannin was extracted from the mangrove bark and its anticorrosion potential was studied by weight loss, electrochemical and scanning electron microscopy (SEM) analysis.FindingsIt has been found that the mangrove tannin effectively inhibits the corrosion on copper metal in hydrochloric acid solution. The results of the electrochemical and weight loss methods showed that the inhibition efficiency of mangrove tannin increases with increasing its concentration. Inhibition is achieved through the adsorption of tannin molecules onto the copper surface and the adsorption follows the Langmuir adsorption isotherm model. SEM study also supports the adsorption of the inhibitor molecules onto the copper surface.Originality/valueIn this paper, mangrove tannin has been studied for the first time as a potential copper corrosion inhibitor in hydrochloric acid medium. The anticorrosion effect of tannin has been proven by standard methods. This natural inhibitor could find use in industries where copper is used as a fabrication metal.
Integrating supply chain infrastructure and process to create joint value
Authors: McCarthy‐Byrne Teresa M. , Mentzer John T. 
Published: March 2011

PurposeThe purpose of this paper is to explore the structural and process integration mechanisms used by firms to form a hybrid mode of supply chain governance referred to as supply chain value integration (SCVI).Design/methodology/approachThe authors employ a multi‐method approach, conducting depth interviews following the grand touring technique to develop the model, and survey methodology to test the model using partial least squares approach for structural path estimation.FindingsSCVI is a multi‐dimensional concept comprised of two second‐order constructs, SCVI infrastructure and SCVI process, each comprised of three first‐order constructs, that lead to joint value creation and improved supply chain performance.Practical implicationsDependent suppliers striving to compete on value creation can adopt bonding behavior by establishing an integrative infrastructure comprised of people, technology, and knowledge components, which balances the level of dependence and motivates the customer to engage in integrative processes.Originality/valueThe authors expand on previous models of integration by developing and testing a comprehensive multi‐dimensional theory of SCVI that explains the relationships between resource dependency theory, resource‐based view of the firm, and relational exchange theory.
Cross‐cultural group performance
Authors: Mitchell Rebecca , Boyle Brendan , Nicholas Stephen 
Published: March 2011

PurposeThis paper aims to explore the assumption that the impact of cultural diversity on knowledge creating capability is consequent to associated differences in knowledge and perspectives, and suggests that these knowledge differences produce their effect by triggering deliberative, collaborative behaviours.Design/methodology/approachTo investigate the impact of intervening variables on diversity's impact in teams, the paper assesses whether cognitive heterogeneity operates as a mediating variable between cultural diversity and knowledge creation, and whether debate operates as a second stage mediator. The paper utilises a survey‐based, quantitative approach and collects data from 98 teams, which is analysed using causal steps approach.FindingsThe results provide support for the assumed impact of cognitive heterogeneity and also support the existence of sequential mediation pathway, with debate operating as a second stage mediator between cognitive heterogeneity and knowledge creation.Originality/valueThe paper advances the research on diversity, cross‐cultural team dynamics and knowledge creation in two main ways. First, it investigates the role of team cognitions in the creation of new ideas by cross‐cultural teams. This responds to calls to understand the factors impacting on the performance of diverse teams (Ayoko and Hartel). Second, it incorporates deliberative team processes into the model as a second‐stage mediator, which responds to calls to understand the role of process variables in team knowledge creation efforts (Drach‐Zahavy and Somech).
Knowledge management antecedents and its impact on employee satisfaction
Authors: Singh Ajay Kr. , Sharma Vandna 
Published: March 2011

PurposeManagers in many organizations have indicated that in today's highly competitive environment, knowledge management will be the key to organizational success in this millennium. This paper aims to analyze how the organizational culture and organizational learning impacts knowledge management, and ultimately the satisfaction of employees working in the firm.Design/methodology/approachA survey instrument comprising organisational culture ethos, organisational learning diagnostics, KM orientation and employee satisfaction was developed. Through a postal and personal survey, data were collected from the telecom sector in India. The sample included 80 knowledge workers, project managers, team members, consultants, researchers and designers randomly drawn from Indian telecom companies.FindingsThe survey instrument was shown to be both reliable and valid. Statistical analytical tools such asF‐test,t‐test, ANOVA coefficient of correlation and multiple regressions and other descriptive statistics scores have been used. The results of the data analysis revealed sufficient evidence to establish a correlation between organisational culture, organisational learning, KM and employee satisfaction.Research limitations/implicationsThe accuracy of the analysis is dependent on the accuracy of the data reported by selected organizations.Practical implicationsThe results of this study would help telecom organisations to better understand the KM discipline, to facilitate its adoption and to prioritise its practices. Academics can use the results to build models that would further expand the KM domain.Originality/valueThis study is probably the first to systematically determine the antecedents of KM implementation in the Telecom sector in India. It offers a beneficial source of information to telecom organisations, which are still lagging far behind when it comes to KM practices.
High involvement work practices that really count: perspectives from the UAE
Authors: Behery Mohamed 
Published: March 2011

PurposeThe aim of the current study is to examine the impact of high involvement work practices (HIWPs) upon trust and commitment in a non‐Western cultural context, namely the UAE.Design/methodology/approachQuantitative, empirical data for the study were collected using self‐administered questionnaires with 600 participants from different service organizations in the UAE. Respondents were asked to provide their perceptions of a range of practices and their impact on trust and commitment.FindingsThe analyses support a model in which a collection of HIWPs positively influenced trust and commitment. In addition, work status and citizenship were used as control variables and played a partially significant role in explaining the effect of those practices on the outcomes.Research limitations/implicationsThe findings imply that managers should realize that implementing high involvement policies, and benefiting from them, is not as simple as instituting a single practice. What is required is an organizational culture that cultivates HIWPs.Originality/valueSince little is known about the process by which UAE organizations promote the HIWPs, this article is the first to examine these issues in a non‐Western setting. Consequently, it contributes to the literature by examining whether the empirical results found in Western environments can be extended to non‐Western contexts.
Target shareholders' wealth creation in domestic and cross‐border acquisitions in India
Authors: Jit Singh Mann Bikram , Kohli Reena 
Published: March 2011

PurposeThis paper seeks to compare target shareholders' wealth gains in domestic and cross‐border acquisitions in India. Two existing schools of thought namely, the industrial organizational theory and bid‐specific factors theory have been compared to identify which of these two theories affect the target shareholders' announcement wealth gains in India.Design/methodology/approachStandard event study methodology has been applied to compute the announcement returns for domestic and cross‐border acquisitions. Cross‐border effect is calculated to compare the value creation in the two sets of acquisitions. Furthermore, cross‐sectional regression analysis is conducted to capture the impact of bid‐related features on target shareholder's value creation.FindingsThe results indicate that both domestic and cross‐border acquisitions have created value for the target company shareholders on the announcement. Nonetheless, the analysis of cross‐border effect as well as regression analysis makes it evident that value creation is higher for domestic acquisitions as compared to cross‐border acquisitions due to the influence of various bid‐specific factors. Thus, in India, bid‐related variables are the fundamental drivers of the target's announcement wealth gains irrespective of the nationality of the acquirer.Originality/valueThe paper extends the discussion on the target's wealth creation in domestic and cross‐border acquisitions by segregating the existing literature into two schools of thoughts namely, the industrial organizational school and bid‐specific factors school in an emerging economy like India. Moreover, various reasons specific to Indian mergers and acquisitions have been forwarded to explain the subdued market reaction to cross‐border acquisitions.
Unpacking cooperation in diverse teams
Authors: Yang Trevor Yu Kang , Cable Daniel M. 
Published: March 2011

PurposeThis paper aims to investigate the effect of team members' informational diversity (i.e. educational and functional dissimilarity) on team cooperation, focusing on the moderating role of long‐term time orientation. The authors theorize that teams' long‐term orientation moderates the diversity‐cooperation relationship through its effect on prosocial civic virtue behaviors.Design/methodology/approachA total of 56 teams of MBA students were surveyed and data were analyzed along with third‐party records of demographic data on educational and functional backgrounds.FindingsMediated moderation analyses indicated that for teams with high long‐term orientation, a negative relationship exists between informational diversity and civic virtue, while no significant relationship existed for teams with low long‐term orientation.Research limitations/implicationsFuture research should be conducted to address remaining concerns about the generalizability of the current findings and common method bias. Further research is also recommended to uncover the potential of cultural values like long‐term orientation to inhibit or facilitate diversity effects.Practical implicationsThe current findings highlight the importance of considering the context and team member orientations toward time in particular as factors impacting how teams with informational diversity operate. Managers of teams consisting of members with high long‐term orientation are advised to take steps to minimize the risk experienced by team members when they engage in voice‐based behaviors.Originality/valueThis article highlights the role of team member orientation towards time as a boundary condition of the link between team diversity and cooperation. Voice‐based civic virtue behaviors are also identified as key antecedents to cooperative teams.
Composite sandwich structures with rapid prototyped cores
Authors: Williams Richard R. , Howard William E. , Martin Scott M. 
Published: March 2011

PurposeThe purpose of this paper is to investigate the feasibility of using rapid prototyping (RP) technologies (stereolithography (SLA), fused deposition modeling (FDM), and three‐dimensional printing (3DP)) for fabrication of the core of a composite sandwich structure.Design/methodology/approachControl cores of a flat geometry were fabricated from epoxy using SLA and from acrylonitrile butadiene styrene (ABS) plastic using FDM. Corrugated geometry cores were fabricated using SLA, FDM, and 3DP. Carbon‐epoxy composite sandwich structures were fabricated from all cores using a wet‐hand layup process with vacuum cure. The performance of each core was measured using a bend test to determine bending stiffness and failure load.FindingsBased upon bending stiffness and failure load, composite sandwich structures utilizing epoxy cores fabricated via SLA outperformed composite sandwich structures utilizing plaster powder and ABS plastic cores. Composite sandwich structures with corrugated ABS plastic cores outperformed those with flat ABS plastic cores by a margin well beyond that predicted by theory in both bending stiffness and failure load.Research limitations/implicationsThe marked improvement in stiffness and failure load of the composite sandwich structures with corrugated ABS plastic cores over those with flat ABS cores is not explained by the theoretical improvement due to an increased area moment of inertia and increased surface area. Additional research in the failure mechanism is warranted.Practical implicationsThe ability to easily create complex core geometries will allow for the ability to place enhanced structural features in the regions of high stress.Originality/valueThis paper demonstrates that cores fabricated via RP technology and containing enhanced structural features are suitable for carbon‐epoxy composite sandwich structures.
Gas turbine blade manufacturing by use of epoxy resin tooling and silicone rubber molding techniques
Authors: Vaezi M. , Safaeian D. , Chua C.K. 
Published: March 2011

PurposeConventional investment casting of turbine blades is a time consuming and expensive process due to the complications in wax injection steps and the complex shape of airfoil surfaces. By using rapid investment casting, a substantial improvement in the gas turbine blade manufacturing process can be expected. However, this process needs to be able to compete with conventional investment casting from a dimensional accuracy view of point. The purpose of this paper is to investigate the manufacture of gas turbine blades via two indirect rapid tooling (RT) technologies, namely epoxy (EP) resin tooling and silicon rubber molding.Design/methodology/approachThe second stage blade of a Ruston TA 1750 gas turbine (rated at 1.3 MW) was digitized by a coordinate measuring machine. The aluminum‐filled EP resin and silicon rubber molds were fabricated using StereoLithography master models. Several wax patterns were made by injection in the EP resin and silicone rubber molds. These wax patterns were utilized for ceramic shell fabrication and blade casting.FindingsDimensional inspection of cast blades showed that silicone rubber molding was not a suitable approach for production of blade wax patterns. The maximum deviation for the final cast blade made using the silicone rubber mold was +0.402 mm. The maximum deviation for the final cast blade made using the EP resin mold was lower at −0.282 mm. This showed that EP resin tooling could enable new cost‐effective solutions for small batch production of gas turbine blades.Practical implicationsThe research results presented will give efficient industrial approach and scientific insight of the gas turbine blade manufacturing by use of rapid technologies.Originality/valueThere are some general research works related to utilization of rapid technologies for manufacturing of gas turbine blade. However, this paper presents a unique procedure of integrated reverse engineering and RT technologies for rapid investment casting of gas turbine blade through presenting comprehensive comparison between two techniques from dimensional accuracy view of point.
Development of new rapid prototyping process
Authors: Wesley Machado Cunico Marlon , Marcus Gomes da Silva Cruz Carlos , Machado Cunico Miriam , Volpato Neri 
Published: March 2011

PurposeThe purpose of this paper is to identify the key elements of a new rapid prototyping process, which involves layer‐by‐layer deposition of liquid‐state material and at the same time using an ultraviolet line source to cure the deposited material. This paper reports studies about the behaviour of filaments, deposition accuracy, filaments interaction and functional feasibility of system. Additionally, the author describes the process which has been proposed, the equipment that has been used for these studies and the material which was developed in this application.Design/methodology/approachThe research has been separated into three study areas in accordance with their goals. In the first, both the behaviour of filament and deposition accuracy was studied. The design of the experiment is described with focus on four response factors (bead width, filament quality, deposition accuracy and deposition continuity) along with function of three control factors (deposition height, deposition velocity and extrusion velocity). The author also studied the interaction between filaments as a function of bead centre distance. In addition, two test samples were prepared to serve as a proof of the methodology and to verify the functional feasibility of the process which has been studied.FindingsThe results show that the proposed process is functionally feasible, and that it is possible to identify the main effects of control factors over response factors. That analysis is used to predict the condition of process as a function of the parameters which control the process. Also identified were distances of centre beads which result in a specific behaviour. The types of interaction between filaments were analysed and sorted into: union, separation and indeterminate. At the end, the functional feasibility of process was proved whereby two test parts could be built.Originality/valueThis paper proposes a new rapid prototyping process and also presents test studies related to this proposition. The author has focused on the filament behaviour, deposition accuracy, interaction between filaments and studied the functional feasibility of process to provide new information about this process, which at the same time is useful to the development of other rapid prototyping processes.