bluuebunny/crossref_metadata_2025_split huggingface dataset:
Protean and boundaryless careers
Authors: E. Okurame David , Fabunmi Rhoda 
Published: February 2014

Purpose– The study aims to explore the role of mentoring and the moderating effects of gender on protean and boundaryless career orientations in the African albeit Nigerian cultural context.Design/methodology/approach– Data were collected from 250 Nigerian nurses through a questionnaire.Findings– Mentoring support predicted protean career dimensions but was non-significant for boundaryless career dimensions. Gender directly accounted for a significant percentage of the variance in physical mobility in favor of women but did not predict self-directed, value-driven and psychological mobility career attitudes. Gender significantly moderated the relationship between mentoring and new career dimensions except physical mobility.Research limitations/implications– The male sample was limited and data from a single professional group/organization in Nigeria may not typify organizations in general. This calls for caution in generalizing findings.Practical implications– Proactive career management and value-driven attitudes can be fostered by ensuring quality mentor support. The peculiar direct and moderating effects of gender on protean and boundaryless careers deserve particular attention.Originality/value– The absence of African perspectives on new career directions in most reference journals limits the global scope of comparative studies. The present study provides information on the under-researched role of mentoring and gender in modern career models from Africa, and makes useful theoretical contributions to new career perspectives, especially in the context of how relationships among study variables may differ across national cultural contexts.
Job demands-resources and employee health and well-being
Authors: van den Tooren Marieke , de Jong Jeroen 
Published: February 2014

Purpose
– The aim of this paper is to investigate whether the main propositions of the job demands-resources (JDR) model are moderated by type of contract (i.e. temporary contract vs permanent contract).

Design/methodology/approach
– Survey data were collected in a large, heterogeneous sample from different countries, sectors, and jobs (n=3,845). Hypotheses were tested by means of multilevel analyses.

Findings
– Results showed moderate support for the main effects of job demands (job insecurity and time pressure) and job resources (autonomy and social support) and weak support for the buffer effect of job resources in the prediction of job satisfaction and general health. The impact of contract type on the main propositions of the JDR model appeared to be weak. Yet, the evidence that was found suggests that temporary workers may be more tolerant to job insecurity and more likely to benefit from the buffering role of autonomy than permanent workers.

Originality/value
– This is the first study to investigate whether the relation between job demands and job resources and employee health and well-being differs for permanent workers and temporary workers.
Supervisor political support as a buffer to subordinates' reactions to politics perceptions
Authors: E. Kane-Frieder Rachel , A. Hochwarter Wayne , L. Hampton Herlanda , R. Ferris Gerald 
Published: February 2014

Purpose– The purpose of this study is to investigate the role of subordinates' perceived supervisor political support (SPS) as a boundary condition capable of attenuating individuals' negative reactions to politics perceptions.Design/methodology/approach– Data for this three-sample investigation were obtained from employees of a package distribution firm (n=144), employees of an engineering firm (n=187), and individuals attending a manufacturing-related professional conference (n=174). Data were analyzed using hierarchical moderated regression analyses.Findings– Consistent with prior research, individuals' politics perceptions were directly associated with less than desirable workplace outcomes. However, individuals' who perceived their supervisors to provide them with SPS were less negatively affected by politics perceptions than their peers who perceived low levels of SPS.Research limitations/implications– SPS appears to provide information to subordinates to aid in sensemaking such that they are better able to deal with requisite uncertainty associated with their political settings, and in doing so, SPS shifts their perceptions of the political environment from that of threat to potential benefit.Originality/value– This investigation in one of a handful of studies to examine the other-benefitting role of political behavior as well as the conditions under which politics perceptions result in auspicious outcomes. Additionally, the manuscript is unique in that it introduces, conceptually delineates, and empirically evaluates a more active, behavioral form of supervisory support (i.e. SPS).
Super-fast multipole method for power frequency electric field in substations
Authors: Zhang Zhanlong , Xie Xuemei , Li Lin , Xiao Dongping , He Wei 
Published: February 2014

Purpose
– The purpose of this study is to calculate the frequency electric field in substation.

Design/methodology/approach
– The paper proposes a novel fast multipole method (FMM) called Super-FMM to solve the PFEF problems in substations. The paper substitutes the original approaches for analytic expansions and translations through equivalent density representations.

Findings
– The paper shows that the Super-FMM is more efficient in terms of the complexity of its storage spaces and computational costs compared with the best-known FMM when placed under scenarios with exactly the same error rates.

Research limitations/implications
– Using the fast Fourier transform algorithm can further improve the optimization algorithm and computational efficiency.

Originality/value
– A novel FMM called Super-FMM is proposed, which has a structure similar to that of the adaptive FMM algorithm, but the paper substitutes the original approaches for analytic expansions and translations through equivalent density representations.
Fuzzy logic control to improve the performance of the direct power control based DFIG
Authors: Verij Kazemi Mohammad , Moradi Morteza , Verij Kazemi Reza 
Published: February 2014

Purpose
– A direct power control (DPC) of the doubly-fed induction generator (DFIG) is presented. A new method, which is based on the rotation of the space sector, clockwise or vice versa, is proposed to improve the performance of the switching table. Then, it is combined with a fuzzy system to have advantages of both rotation sector and fuzzy controller. The paper aims to discuss these issues.

Design/methodology/approach
– In this paper, a new DPC of the DFIG is presented. To improve the performance of the switching table, a new method is proposed. The method is based on the rotation of the space sector, clockwise or vice versa. The excellence of the proposed method is proven. Then, it is shown that the performance of the system can be enhanced by using a fuzzy logic controller. The rotation method is combined with a fuzzy system.

Findings
– Simulation shows that although sector rotation and fuzzy controller can improve the performance of the DFIG, a combination of both demonstrates a smoother response in order that reactive and active power ripples and THD of the injected current decrease in different speeds. Also, it is demonstrated that the proposed method is robust against parameters variations. However, a hardware experiment should be performed to be practically verified.

Originality/value
– A sector rotation is proposed and its effect on the performance of the DFIG is considered. A simple method to write rules table is presented and the performance of sector rotation and fuzzy controller on the DFIG is analysed.
Simulation of linear dynamic macro model of photo catalytic sensor in SPICE
Authors: Whig Pawan , Naseem Ahmad Syed 
Published: February 2014

Purpose
– The flow injection analysis (FIA) technique by Yoon-Chang Kim et al. for the determination of chemical oxygen demand (COD) involves the complete analysis including sampling and washing. FIA is analytical method for the measurement of COD using photochemical column. This method uses a bulky setup and takes 10-15 minutes to get the output result which is a tedious and time-consuming job. If conventional method is continuously used for a long time, then it is stable only for 15 days. The purpose of this paper is to propose an approach which is more users friendly and fast in operation by modeling and optimization of sensor used for water quality monitoring. This is to overcome several drawbacks generally found in the previous work like complex designing, nonlinearity and long computation time. The nonlinearity in conventional device is overcome by increasing the values of coefficient of determination R2 which in turn reduce the standard error.

Design/methodology/approach
– A simulation program with integrated circuit emphasis (SPICE) model of photo catalytic sensor (PCS) is proposed for easy and fast operation and optimization of power.

Findings
– The proposed macro model operates under subthreshold conditions that are appreciated in large integrated system design. The results of simulation were found to be fairly in agreement with the theoretical predictions. The results exhibited near linear variations of parameters of interest with appreciably reduced response time. The coefficient of determination (R2) has been found to be more in this technique.

Research limitations/implications
– As the threshold voltage of different photo catalytic materials will be different, Eref in the setup has to be adjusted accordingly to obtain sufficient quantity of current to operate the device.

Originality/value
– This approach relies on the SPICE model. The development of SPICE model for photochemical sensor is novel which is fast in operation and more user friendly.
Mathematical modeling of a novel bearingless switched reluctance motor
Authors: Wang Xilian , Ge Baoming , Wang Jin 
Published: February 2014

Purpose
– The novel bearingless switched reluctance motor (BSRM) is proposed recently, which is different from the conventional BSRM in the stator structure and suspension winding arrangement. The reduced number of suspension windings makes the novel BSRM much simpler, so that the control circuit and algorithm are greatly simplified when compared to those of the conventional BSRM. This paper for the first time proposes the novel BSRM's analytic model, including the mathematical relationships among the winding currents, rotor angle, radial forces, and motor torque, to further achieve the suspending forces and torque control. The paper aims to discuss these issues.

Design/methodology/approach
– The magnetic equivalent circuit method is employed to obtain the self-inductances and mutual-inductances of the motor torque windings (main windings) and suspension windings (control windings). The straight flux paths are combined with the elliptical fringing flux paths to calculate the air-gap permeances, and the stored magnetic energy. Then, the mathematical expressions of radial forces and torque are derived. A novel BSRM prototype is analyzed through using the proposed analytical model and the finite element model. The results of both methods are compared to verify the proposed mathematical model.

Findings
– The proposed mathematical model of the novel BSRM considering unsaturated magnetic circuits is verified by finite-element analysis results.

Research limitations/implications
– The mathematical model represents the situation of magnetic circuit unsaturated and is not suitable for the magnetic circuit saturation. It cannot be used to control the motor which is working in the deep magnetic circuit saturation region.

Practical implications
– Building mathematical model is a necessary step for the motor's suspension and rotating control. The built model provides the fundamental for the preliminary control algorithm and experimental study of this novel BSRM.

Originality/value
– For the first time, the novel BSRM's mathematical model is proposed. It provides necessary fundamental for the motor's further analysis, design, and suspending and rotating controls.
Efficient numerical simulation of DC potential drop signals for application to NDT of metallic foam
Authors: Wang Xiaojuan , Xie Shejuan , Li Yong , Chen Zhenmao 
Published: February 2014

Purpose
– Direct current potential drop (DCPD) testing is a potential nondestructive testing method for quality control of the metallic foam (MF). The purpose of this paper is to develop a numerical technique for the efficient simulation of the DCPD signals of MFs with defects with boundary of complicated shapes.

Design/methodology/approach
– The concept of multi-medium element (MME) is introduced to treat the boundary of complex-shaped defect. A classification scheme of Gauss integral points is also proposed to select the Gauss points that have to be taken into account in the integral calculation of the coefficient matrix of each MME.

Findings
– MME is suitable for simulation of DCPD signals due to defects in complicated shapes. The numerical method for calculating the element matrix of the MME is efficient and accurate. The experimental results support the proposed method positively.

Research limitations/implications
– The code developed in this paper is suitable for the simulation of DCPD signals of MF due to a planar defect. The code for 3D defect is still under development.

Originality/value
– The concept of MME introduced to deal with the simulation of DCPD signal due to defect with boundary of complicated shape, as well as the numerical technique for element coefficient matrix calculation. The developed method gives possible for the inversion of DCPD signals of complicated defect shape.
Flexible test bed for the behavioural modelling of power amplifiers
Authors: Cruz Nuñez-Perez José , Ricardo Cardenas-Valdez José , Gontrand Christian , Apolinar Reynoso-Hernandez J. , Iwao Hirata-Flores Francisco , Jauregui-Duran Rigoberto , J. Perez-Pinal Francisco 
Published: February 2014

Purpose
– The paper aims to focus on the memory-polynomial model (MPM) as special case of Volterra series, implemented in hardware. The behavior of the MPM is fully proved through a comparison with AM-AM and AM-PM measured data. The results show that this simulation technique is able to prove the effectiveness of the MPM implementation as behavioural model for high power radiofrequency amplifiers. The system is able to compensate perturbations caused by modern communication systems.

Design/methodology/approach
– The implementation uses Matlab-Simulink, and its digital signal processing (DSP) builder. The first stage allows developing the model in Matlab using the DSP builder blockset through the signal compiler block. Then, the design is downloaded to the DSP board.

Findings
– The paper demonstrates a proper behavior of the MPM as a truncation of the Volterra series, with respect to different inputs. This is a key point, because the series truncations allow first to implement this model in real time and second to obtain a correct precision, for instance when modeling amplification of digital signals in high frequency.

Originality/value
– The global system approach permits to easily develop, simulate, and validate a wireless system. The efficiency of a complete connected solution based on Agilent Technologies tools, combining simulations and measurements under true operating conditions, seems to be clearly demonstrated.
Finite element modeling of current dipoles using direct and subtraction methods for EEG forward problem
Authors: Zhang Yujie , Ren Zhuoxiang , Lautru David 
Published: February 2014

Purpose
– The resolution of electroencephalography (EEG) forward problem by the finite element method (FEM) involves the modeling of current dipoles with the singularities. The purpose of the paper is to investigate the accuracy issue of the two alternative methods, the direct method and the subtraction method for the modeling of current dipoles.

Design/methodology/approach
– Finite element modeling of current dipoles using the direct method and the alternative implementations of the subtraction method.

Findings
– The accuracy and the performance of different methods are compared through a four-layer spherical head model with available analytical solution. Results show that the subtraction method involving only the surface integrals provides the best accuracy.

Originality/value
– The subtraction method removes the difficulty of modeling the singularity of current dipoles but the accuracy depends on the implementation.
Minimizing sidelobe levels and facilitating null placements of nonlinear antenna arrays using an improved particle swarm optimization method
Authors: Deng Huijun , Li Xue , Sun Libao , Yang Shiyou 
Published: February 2014

Purpose
– The aim of this paper is to explore the potential of particle swarm optimization (PSO) methods for minimizing the sidelobe levels (SLL) and placing null at arbitrary angles of a nonlinear antenna array.

Design/methodology/approach
– An improved PSO algorithm is designed.

Findings
– The improved PSO method is an efficient and robust global optimizer for minimizing the SLL and placing null at arbitrary angles of a nonlinear antenna array.

Originality/value
– Some improvements, such as the design of some new formulae for both position and velocity updating, the introduction of an age variable, and the devise of an intensification searches using the cross entropy method, are proposed.
Determination of the weighted mean path length of the Epstein frame
Authors: Qingyi Kong , Cheng Zhiguang , Wang Xiaoyan , Fan Yana , Liu Lanrong , Liu Tao , Guo Jing 
Published: February 2014

Purpose
– The purpose of this paper is to investigate the effects of the related factors on the mean path length of the Epstein frame and propose a weighted method based on the different specific losses to decide the actual mean path length of the Epstein frame.

Design/methodology/approach
– Two Epstein frames of different dimensions (i.e. standard 25 cm and revised 17.5 cm Epstein frame) are used in experiments, and two kinds of the mean path lengths, lm1 and lm2, are defined based on the different specific iron losses produced at the middle part of the limb and the rest of the whole frame, respectively.

Findings
– The mean magnetic path varies with many factors such as peak flux density, excitation frequency, permeability as well as the anisotropy of the material under test.

Originality/value
– The results play an important role in designing the transformer core and the building factor.
Research on magnetostriction of grain-oriented electrical silicon-steel sheet
Authors: Bai Baodong , Wang Jiayin 
Published: February 2014

Purpose
– The magnetostriction of grain-oriented electrical silicon steel sheet is studied for the magnetic field direction along the rolling direction and deviating from it. The method of calculating the vibration of transformer is developed through COMSOL. The paper aims to discuss these issues.

Design/methodology/approach
– Measurements of signals of magnetostriction and magnetic polarization, and calculation through software.

Findings
– The angle between the magnetic field direction and the rolling direction does a great influence on magnetostriction strain.

Originality/value
– The maximum λ
p-p of transversal magnetostriction is above 30 times more than the value when the angle is 0°. The transversal magnetostriction is a main reason of vibration increasing at the corner of transformer.
Progress or repetition? Gender perspectives in disaster management in Japan
Authors: Saito Yoko 
Published: February 2014

Purpose
– The purpose of this paper is to review research on gender and disasters in Japan, from the Kobe Earthquake to the Great East Japan Earthquake (GEJE). Gender perspectives were not adequately considered immediately after these disasters. Rather, disasters reinforced the gender roles prevalent in Japanese society. The paper seeks ways to position gender perspectives into mainstream thought on disaster management in Japan.

Design/methodology/approach
– A literature review was conducted of secondary Japanese sources including peer-reviewed and non-academic journals published by governmental and non-governmental organisations after the Kobe, Niigata Chuetsu, and GEJEs. Popularly searched keywords were the Japanese for “gender” or “women”, and “disasters”.

Findings
– A review of the published literature indicated that gender-related issues experienced during the Kobe Earthquake in 1995 and the Niigata Chuetsu Earthquake in 2004 were repeated following the GEJE in 2011. Japan has experienced numerous disasters; thus, the importance of gender perspectives has been gradually recognised and has received increased attention after the GEJE. This paper emphasises that these should be embedded at policy level and within disaster management structures to create disaster resilient communities.

Originality/value
– To date, not much research in Japan, and none published in English, has reviewed gender- and disaster-related issues.
Comparative study on teacher training for school disaster management in Armenia and Japan
Authors: Shiwaku Koichi 
Published: February 2014

Purpose– Teacher training is significant for effective school disaster management. The purposes of this paper are: first, to set items for analysis of teacher training program of Armenia through identification of teacher training program of Emergency And Rescue Team by school staff in Hyogo (EARTH) to understand the characteristics of teacher training program of Armenia; second, to identify common points and different points of school disaster management and teacher training between EARTH and Armenia to understand the characteristics of one of training program of Japan; and third, to propose improvement of teacher training of Armenia through identification of problems to give suggestions to improve teacher training program of Armenia.Design/methodology/approach– One of teacher training program for school disaster management in Japan can be considered as a good practice. The objectives are achieved through the comparison of teacher training program between Armenia and Japan.Findings– In Armenia, there are three training targets. Training contents should be developed after the clear concept development of training for each target. This paper proposed the concept based on EARTH training program. Normalization of school including psychological care is the main contents for school directors and deputy directors. Disaster management system and disaster management drill are the contents for military science teachers. Disaster education is the main contents for general teachers.Originality/value– This paper considered mainstreaming school disaster management from the aspect of teacher training and application of training program to other countries.