bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects for console game sales in Japan market
Authors: Kimura Makoto 
Published: January 2015

Purpose
– The purpose of this paper is to examine the respective effects of advertising, word of mouth (operationalized as “tweets” on Twitter), and serialization on sales of console game series in Japan.

Design/methodology/approach
– To do this, the author classified console game series into four categories on the basis of their sales, identified a singular case that corresponds to each category, and presented a performance calculation model that approximates variation in sales for the first and second titles of each series.

Findings
– Coupled with the results generated by the performance models a comparison of each game series showed that although word-of-mouth and backward serialization may influence sales performance for the first title in a console game series, sales of the second title in the series were most heavily influenced by forward serialization and advertising. The author further found that word-of-mouth via social networks was unlikely to affect the sales performance of a series’ second title.

Research limitations/implications
– The sales of first title video game console series permit the forecasting and evaluation of the sales’ second title performance through the performance calculation model incorporating the advertising, word-of-mouth, and serialization effect and vice versa.

Originality/value
– Taken together, these results demonstrate that the affordances of social networking can be used to improve sales performance for the first title in a series, and the use of backward serialization for subsequent titles could incite the purchase of over a million copies of the game(s).
Iron loss in FSPMM: 2D FEA-based comparative study between single and double-layer topologies
Authors: Masmoudi Asma , Masmoudi Ahmed 
Published: January 2015

Purpose
– The purpose of this paper is to compare the study between two topologies of fractional-slot permanent-magnet machines such that: double-layer topology and single-layer one. The comparison considers the assessment of the iron loss in the laminated cores of the magnetic circuit as well as in the permanent magnets (PMs) for constant torque and flux weakening ranges.

Design/methodology/approach
– The investigation of the hysteresis and eddy-current loss has been carried out using 2D transient FEA models.

Findings
– It has been found that the stator iron losses are almost the same for both topologies. Whereas, the single-layer topology is penalized by higher iron loss especially the eddy-current ones taking place in the PMs. This is due to their denser harmonic content of the armature air gap MMF spatial repartition.

Originality/value
– The analysis of the iron loss maps in different parts of each machine including stator and rotor laminations as well as the PMs, in one hand, and the investigation of their variation with respect to the speed, in the other hand, represent the major contribution of this work.
Torque ripple reduction of synchronous reluctance machines
Authors: Wang K. , Zhu Z.Q. , Ombach G. , Koch M. , Zhang S. , Xu J. 
Published: January 2015

Purpose
– The purpose of this paper is to investigate the influence of stator and rotor pole number combinations together with the flux-barrier layers number on the performance of synchronous reluctance machine with emphasis on output torque capability and torque ripple.

Design/methodology/approach
– AC synchronous reluctance machine (SynRM) or permanent magnet assisted SynRM presently receives a great deal of interest, since there is less or even no rare-earth permanent magnet in the rotor. Most of SynRM machines employ a stator that is originally designed for a standard squirrel cage induction motor for a similar output rating and application, or the SynRM machine with 24-slot, four-pole are often directly chosen for investigation in most of the available literature. Therefore, it is necessary to investigate the influence of stator and rotor pole number combinations together with the flux-barrier layers number on the performance of SynRM machine with emphasis on output torque capability and torque ripple.

Findings
– The average torque decreases with the increase of the pole numbers but remain almost constant when employing different stator slot numbers but with the same pole number. In addition, the torque ripple decreases significantly with the increase of the stator slot number. The machine with double-layer flux-barrier in the rotor has the biggest average torque, while the machines with three- and four-layer flux-barrier in the rotor have almost the same average torque but their value is slightly smaller than that of machine with double-layer flux-barrier. However, the machine with three-layer flux-barrier has the lowest torque ripple but the highest torque ripple exists in the machine with double-layer flux-barrier.

Research limitations/implications
– The purely sinusoidal currents are applied in this analysis and the effects of harmonics in the current on torque ripple are not considered in this application.

Originality/value
– This paper has analyzed the torque ripple and average torque of SynRMs with considering slot/pole number combinations together with the flux-barrier number.
Torque ripple reduction of synchronous reluctance machines: using asymmetric flux-barrier
Authors: Wang K. , Zhu Z.Q. , Ombach G. , Koch M. , Zhang S. , Xu J. 
Published: January 2015

Purpose
– The purpose of this paper is to reduce the torque ripple but not to decrease the average torque of synchronous reluctance machines by using one step or more than two axially laminated rotors with asymmetric flux-barrier.

Design/methodology/approach
– A 24-slot four-pole synchronous reluctance machine with overlapping windings and asymmetric flux-barrier in the rotor is, first, described and designed by finite element (FE) method for maximizing average torque. The dimensions of asymmetric flux-barrier including the pole span angle and flux-barrier angle will be optimized to minimize the torque ripple and its influence on the average torque is also investigated by FE analysis. The impact of current angle on the average torque and torque ripple are also analysed. The step laminations together with the asymmetric flux-barrier are employed for further torque ripple reduction which can consider the both rotation directions.

Findings
– The torque ripple of synchronous reluctance machine can be significantly reduced by employing asymmetric flux-barrier but the average torque is not reduced.

Research limitations/implications
– The purely sinusoidal currents are applied in this analysis and the effects of harmonics in the current on torque ripple are not considered in this application. The 24-slot/four-pole synchronous reluctance machine with single-layer flux-barrier has been employed in this analysis, but this work can be continued to investigate the synchronous reluctance machine with multilayer flux-barrier. This asymmetric flux-barrier can be easily applied to permanent magnet (PM)-assisted synchronous reluctance machine and the interior PM machine with flux-barrier in the rotor, since the space which is used for PM insertion is the same as the SynRM machines.

Originality/value
– This paper has analysed the torque ripple and average torque of synchronous reluctance machines with asymmetric flux-barrier and step laminations with asymmetric flux-barrier. The torque ripple can be reduced by this flux-barrier arrangement. The difference of this technique with the other techniques such as stator/rotor skew is that the average torque can be improved.
An algorithm for the fast estimate of the maximum power voltages in PV applications adopting microconverters
Authors: Balato Marco , Vitelli Massimo 
Published: January 2015

Purpose
– The purpose of this paper is to discuss the main parameters influencing the performances of Distributed Maximum Power Point Tracking (DMPPT) and to present an algorithm aimed at the maximization of the energetic efficiency of the grid-connected PhotoVoltaic (PV) systems. Such an algorithm is based on the estimate of the optimal operating range of the input inverter voltage and of the optimal operating voltages of the PV modules.

Design/methodology/approach
– The Fast Estimate of the Maximum Power Voltages algorithm, described in this paper, is based on the idea that the controllers of the DC/DC converters (DMPPT function) and the controller of the inverter (Central MPPT function) must be able to exchange useful data in order to carry out a suitable technique based on the jointed adoption of DMPPT and CMPPT function. Such a technique is essentially based on the knowledge, even if in approximate form, of the Power vs Voltage (P-V) characteristic of a string composed by PV modules and DC/DC converters and on the consequent fast identification of a set of operating points for the inverter and for the PV modules.

Findings
– The main advantage of the proposed algorithm is represented by the fast identification of a set of operating points for the inverter and for the PV modules, which allows to obtain a marked increase of the speed of tracking both of the inverter and of the DC/DC converters performing the DMPPT function.

Originality/value
– The simulation results, shown in this paper, confirm the validity of the proposed original approach.
Modeling and analysis of different control techniques of conductive battery chargers for electric vehicles applications
Authors: Hegazy Omar , El Baghdadi Mohamed , Van Mierlo Joeri , Lataire Philippe 
Published: January 2015

Purpose
– The purpose of this paper is to analyze and simulate the control techniques that can be used to control the on-board conductive battery chargers (OCBCs) for electric vehicles applications. This paper also provides a comparative study of these control techniques.

Design/methodology/approach
– Battery chargers would play an important role in the development of new battery electric vehicles (BEVs). The control techniques of these OCBCs can significantly influence the BEV performance during the charging mode from the ac grid. In addition, the proper selection of control systems of the OCBCs has a great impact on the power quality of the AC grid during the charging period. Therefore, this paper presents the analysis of different control techniques that are commonly used to control the battery chargers. In addition, a comparative study of different control techniques of the OCBCs for BEVs is provided.

Findings
– The results have demonstrated that it is possible to significantly improve the efficiency, power factor and total harmonic distortion by using proportional-integral control and proportional-resonant control. The digital control can be used to validate the selected control technique.

Originality/value
– The main objective of this paper is to analyze the different control methods that can be used to control the OCBCs during charging mode from the ac grid. In addition, this paper presents a comparative analysis between these control methods. In this paper, a digital control based on TMS320F2808 DSP is used to implement the proper control method for OCBCs.
Fuzzy logic based power management strategy using topographic data for an electric vehicle with a battery-ultracapacitor energy storage
Authors: Michalczuk Marek , Ufnalski Bartlomiej , Grzesiak Lech M. 
Published: January 2015

Purpose
– The purpose of this paper is to provide high-efficiency and high-power hybrid energy source for an urban electric vehicle. A power management strategy based on fuzzy logic has been introduced for battery-ultracapacitor (UC) energy storage.

Design/methodology/approach
– The paper describes the design and construction of on-board hybrid source. The proposed energy storage system consists of battery, UCs and two DC/DC interleaved converters interfacing both storages. A fuzzy-logic controller (FLC) for the hybrid energy source is developed and discussed. Control structure has been tested using a non-mobile experimental setup.

Findings
– The hybrid energy storage ensures high-power ability. Flexibility and robustness offered by the FLC give an easy accessible method to provide a power management algorithm extended with additional input information from road infrastructure or other vehicles. In the presented research, it was examined that using information related to the topography of the road in the control structure helps to improve hybrid storage performance.

Research limitations/implications
– The proposed control algorithm is about to be validated also in an experimental car.

Originality/value
– Exploratory studies have been provided to investigate the benefits of energy storage hybridization for electric vehicle. Simulation and experimental results confirm that the combination of lithium batteries and UCs improves performance and reliability of the energy source. To reduce power impulses drawn from the battery, power management algorithm takes into consideration information on slope of a terrain.
User participation and stakeholder involvement in health care innovation – does it matter?
Authors: Bjørkquist Catharina , Ramsdal Helge , Ramsdal Kjetil 
Published: January 2015

Purpose– The purpose of this paper is to discuss how and to what extent users can become involved in the process of selecting and implementing telecare and telehealth technologies in local health care services.Design/methodology/approach– The discussion is based on data from a project in one local authority in Norway. About 100 persons have participated in focus group interviews where issues regarding new telecare and telehealth technologies for the elderly were discussed. The focus groups involved different groups of product users and stakeholder groups, i.e. “older senior users” (over 65 years), “younger senior users” (55-65 years), relatives, health care professionals and general practitioners (GPs).Findings– Different user groups have different stakes in the technology. It is difficult to involve “older senior users” in the selection process due to their lack of information about potential solutions, while “younger senior users” are more informed and positive towards the introduction of telecare and telehealth technologies. The results also indicate that professionals are ambiguous towards new technologies; on the one hand they expect services to be better, but on the other they are concerned about ethical and working life issues that have not been fully explored as yet.Originality/value– This paper provides an understanding of how different groups of product users and stakeholder groups relate to and can be involved in an expanded implementation process of telecare and telehealth technology which allow older people to remain in their homes for longer.
The differentiated impacts of organizational innovation practices on technological innovation persistence
Authors: Le Bas Christian , Mothe Caroline , Nguyen-Thi Thuc Uyen 
Published: January 2015

Purpose– The purpose of this paper is to test the major determinants of technological (product and process) innovation persistence and provides evidence of the significant role of organizational innovation.Design/methodology/approach– Data came from two waves of the Luxembourg Community Innovation Survey (CIS): CIS2006 for 2004-2006 and CIS2008 for 2006-2008. The longitudinal data set resulted in a final sample of 287 firms. A multinomial probit model estimates the likelihood that each firm belongs to one of three longitudinal innovation profiles: no, sporadic, or persistent innovators.Findings– The determinants have differentiated impacts on process and technological innovation persistence. Organizational innovation influences technological innovation persistence. In the analysis of detailed organizational practices, strong evidence emerged that knowledge management exerts a crucial effect on product innovation persistence; workplace organization instead is associated with process innovation persistence.Research limitations/implications– The relationships of innovation persistence, organizational innovation, and firms’ economic performance demand further exploration. The different persistence patterns of complex (process and product) and simple (process or product) innovators also are worth investigating.Practical implications– Organizational innovation matters for technological innovation persistence. However, the effects of non-technological innovation differ depending on whether the firm wants to innovate in processes or products. Managers must acknowledge these various effects and select appropriate strategies.Originality/value– Few works account for the impact of organizational innovation strategies on technological innovation. This study is the first, based on recent CIS data, to address the role of organizational innovation practices for technological innovation persistence, which appears necessary for the sustainable dynamics of firms, industries, and regions.
Balancing diversity in innovation networks
Authors: Sandberg Johan , Holmström Jonny , Napier Nannette , Levén Per 
Published: January 2015

Purpose– Although the potential of innovation networks that involve both university and industry actors is great variances in cultures, goals and knowledge poses significant challenges. To better understand management of such innovation networks, the authors investigate different strategies for balancing diversity. The paper aims to discuss these issues.Design/methodology/approach– In this multiple case study, the authors draw on network and trading zone theory to examine the strategies of four research centers that govern university-industry innovation networks.Findings– The authors provide empirically grounded descriptions of strategies for balancing diversity in innovation processes, extend previous theorizations by suggesting two types of trading zones (transformative and performative), and identify four strategy configuration dimensions (means of knowledge trade, tie configuration, knowledge mobility mechanisms and types of trust).Research limitations/implications– Further research is needed on transferability of results when, e.g. cultural collaboration and communication patterns change, and performance implications of different configurations. The research provides conceptual tools for future research on the impact of different diversity strategies.Practical implications– The findings point to the importance of identifying desired types of innovation outcomes and designing the appropriate level of diversity. To implement the selected strategy, managers need to configure communication channels and strength of relationships, establish associated capacity for knowledge transfer and build appropriate levels of trust.Originality/value– While extant research has provided a solid understanding of benefits from diversity in boundary spanning innovation processes, this paper outlines strategies for managing associated challenges.
A numerical method for two-dimensional inverse heat conduction problems
Authors: Li Xiuying 
Published: January 2015

Purpose
– The purpose of this paper is to introduce an effective method for two-dimensional inverse heat conduction problems.

Design/methodology/approach
– The variational iteration method (VIM) is used to solve two-dimensional inverse heat conduction problems and restore boundary conditions in heat conduction.

Findings
– Numerical results compared with other methods show that the present method is remarkably effective for solving two-dimensional inverse heat conduction problems. This method is a very promoting method, which will be certainly found wide applications.

Originality/value
– The VIM is applied to two-dimensional inverse heat conduction problems for the first time.
Three dimensional flow of an Oldroyd-B fluid with Newtonian heating
Authors: Ramzan M. , Farooq M. , Alhothuali M. S. , Malaikah H. M. , Cui W. , Hayat T. 
Published: January 2015

Purpose
– The purpose of this paper is to analyze the boundary layer flow of an Oldroyd-B fluid with Newtonian heating.

Design/methodology/approach
– Series solutions are found by homotopy analysis method.

Findings
– Temperature profile increases with an increase in conjugate parameter. Increase in parameter β and Prandtl number Pr decreases the temperature profile.

Originality/value
– This work does not currently exist in the literature.
An efficient algorithm based on Haar wavelets for numerical simulation of Fokker-Planck equations with constants and variable coefficients
Authors: Kumar Manoj , Pandit Sapna 
Published: January 2015

Purpose
– The purpose of this paper is to discuss the application of the Haar wavelets for solving linear and nonlinear Fokker-Planck equations with appropriate initial and boundary conditions.

Design/methodology/approach
– Haar wavelet approach converts the problems into a system of linear algebraic equations and the obtained system is solved by Gauss-elimination method.

Findings
– The accuracy of the proposed scheme is demonstrated on three test examples. The numerical solutions prove that the proposed method is reliable and yields compatible results with the exact solutions. The scheme provides better results than the schemes [9, 14].

Originality/value
– The developed scheme is a new scheme for Fokker-Planck equations. The scheme based on Haar wavelets is expended for nonlinear partial differential equations with variable coefficients.
Direct expansion method of moments with n/3th moments for nanoparticle Brownian coagulation in the free molecule regime
Authors: Fangyang Yuan , Zhongli Chen 
Published: January 2015

Purpose– The purpose of this paper is to develop new types of direct expansion method of moments (DEMM) by using the n/3th moments for simulating nanoparticle Brownian coagulation in the free molecule regime. The feasibilities of new proposed DEMMs with n/3th moments are investigated to describe the evolution of aerosol size distribution, and some of the models will be applied to further simulation of physical processes.Design/methodology/approach– The accuracy and efficiency of some kinds of methods of moments are mainly compared including the quadrature method of moments (QMOM), Taylor-expansion method of moments (TEMOM), the log-normal preserving method of moments proposed by Lee (LMM) and the derived DEMM in this paper. QMOM with 12 quadrature approximation points is taken as a reference to evaluate other methods.Findings– The newly derived models, namely DEMM(4/3,4) and DEMM(2,6), as well as the previous DEMM(2,4), are considered to be qualified models due to their high accuracy and efficiency. They are confirmed to be valid and alternative models to describe the evolution of aerosol size distribution for particle dynamical process involving the n/3th moments.Originality/value– The n/3th moments, which have clear physical interpretations when n stands for first several integers, are first introduced in the DEMM method for simulating nanoparticle Brownian coagulation in the free molecule regime.
Approximate solutions of multi-order fractional advection-dispersion equation with non-polynomial conditions
Authors: Liu Yanqin , Dong Lihua 
Published: January 2015

Purpose– The purpose of this paper is to apply a new modified homotopy perturbation method, which is effective to solve multi-order fractional equations with non-polynomial initial and boundary conditions.Design/methodology/approach– The proposed algorithm is tested on multi-order fractional advection-dispersion equations. The fractional derivatives described in this paper are in the Caputo sense.Findings– Approximate results explicitly reveal the complete reliability, efficiency and accuracy of the new modified technique.Originality/value– It is observed that the approach may be implemented to other multi-fractional models with non-polynomial initial and boundary conditions.