bluuebunny/crossref_metadata_2025_split huggingface dataset:
An optimization approach for DAL assignments
Authors: Li Xianan , Lu Zhong , Wang Jingyi 
Published: January 2018

Purpose
Development assurance level (DAL) is the measurement of the rigor of development assurance tasks performed to functions or items. The DAL assignment is an important process of aircraft system development that can make the reliability and safety of the system stay at acceptable levels. This paper aims to propose an optimization approach for the DAL assignments to minimize the development cost of aircraft systems.

Design/methodology/approach
The mathematical model for the DAL assignment optimization has been developed on the basis of the given expressions of objective function and constraints. In addition, a hybrid algorithm model synthesizing the advantages of genetic algorithm (GA) and Tabu search (TS) has been proposed to solve the optimization problem of the DAL assignment.

Findings
The results of the case study show that the proposed hybrid algorithm is more efficient and effective than the exhaustive method as well as the pure GA.

Practical implications
The proposed approach can be applied in the development of aircraft systems, and it has great significance in minimizing the development cost as well as keeping the system reliability and safety at an acceptable level.

Originality/value
The constrained optimization method has been applied in the DAL assignments, the corresponding mathematical model has been built and a hybrid evolutionary algorithm has been proposed to solve the optimization problem.
Bevel gears tooth contact pattern verification
Authors: Trzewik Pawel , Skawinski Piotr 
Published: January 2018

Purpose
This paper aims to create an application to support spiral bevel gear contact pattern verification in the computer aided design (CAD) system to speed up the selection of technological setups for the cutting machine by finding these in the virtual environment at the design level.

Design/methodology/approach
This paper presents an application which has been created to simulate a pattern check on spiral bevel gears in the virtual environment. The pattern check is conducted on the CAD models obtained from the cutting simulation in the CAD system using technological settings calculated by the KONTEPS system. Check of the contact pattern in the virtual environment works in the same way as in the real production process. The application has been written in C# programming language and run in the NX open environment in the UG NX.

Findings
This paper shows the possibilities of how the CAD system can be used at the design level of spiral bevel gears to verify an unloaded tooth contact pattern position for applied technological setups for dedicated cutting machine.

Practical implications
This paper describes an application that has the possibility to be implemented in small companies which produce small lots of gear sets and help to decrease the time for setting a cutting machine.

Originality/value
This paper addresses the needs to find new technologies to improve the design process of the spiral bevel gears.
Analytical study and simulation of a transformer-less photovoltaic grid-connected inverter with a delta-type tri-direction clamping cell for leakage current elimination
Authors: Jalilzadeh Tohid , Tarafdar Hagh Mehrdad , Sabahi Mehran 
Published: January 2018

PurposeThis paper aims to propose a new transformer-less inverter structure to reduce the common-mode leakage current in grid-connected photovoltaic (PV) systems.

Design/methodology/approachThe proposed circuit structure is the same as the conventional full-bridge inverter with three additional power switches in a triangular structure. These three power switches are between the bridge and the output filter, and they mitigate the common-mode leakage current flowing toward the PV panels’ capacitors. The common-mode leakage current mitigation is done through the three-direction clamping cell (TDCC) concept. By clamping the common-mode voltage to the middle voltage of the DC-link capacitors, the leakage current and the total harmonic distortion (THD) of the injected current to the grid is effectively reduced. Therefore, the efficiency is improved.

FindingsThe switching modes and the control method are introduced. A comparison is carried out between the proposed structure and other solutions in the literature. The proposed topology and its respective control method are simulated by PSCAD/EMTDC software. The simulation results validate the advantages of the presented structure such as clamping the common-mode voltage and reducing leakage current and THD of injected current to the grid.

Originality/valuePresenting a single phase-improved inverter structure with low-leakage current for grid-connected PV power systems represents a significant original contribution to this work. The proposed structure can inject a sinusoidal current with low THD to the AC grid, and the power factor is unity on the AC side. In the half positive cycle, one of the switches in the TDCC is turned off under zero current. Besides, one of the other switches in TDCC is turned on with zero voltage and, therefore, its turn-on switching losses are zero. The efficiency of the proposed topology is high because of the reduction of leakage current and power losses. Accordingly, the presented topology can be a good solution to the leakage current elimination.
Predicting the unstable period-1 orbit (UPO-1) of DC–DC converters by extracting harmonic content
Authors: Chen Xi , Chen Yanfeng , Zhang Bo , Qiu Dongyuan , Li Zi 
Published: January 2018

PurposeThis study aims to predict the unstable period-1 orbit (UPO-1) of DC–DC converters and find analytical expressions to describe it.

Design/methodology/approachNonlinear dynamical phenomena of a peak–current–mode controlled direct current–direct current (DC–DC) Boost converter are discussed briefly first. Then fast fourier transform (FFT) analysis of state variables under different dynamic states is provided, and the characteristic of the harmonic content in different states is summarized. Following these, a scientific hypothesis on the harmonic content of the UPO-1 is presented, and the Equivalent Small Parameter method is adopted then, thus analytic-form expressions of the UPO-1 can be derived.

FindingsAccording to results of theoretical analysis, numerical simulations and experiments, this paper illustrates that, like stable period-1 orbit, the UPO-1 is also made up of the DC component and harmonics with integer times of switching frequency.

Originality/valueThis work provides an unreported approach for extracting the UPO-1 of DC–DC converters, which is mainly based on predicting the harmonic structure information of the orbit. According to experimental parts of the work, it shows that the stabilizer can be designed easier by using the proposed method. Additionally, from a broader perspective, the results could also have implications in a wide class of forced oscillation systems.
Numerical modelling on partial discharge in HVDC XLPE cable
Authors: He Miao , Hao Miao , Chen George , Chen Xin , Li Wenpeng , Zhang Chong , Wang Haitian , Zhou Mingyu , Lei Xianzhang 
Published: January 2018

PurposeHigh voltage direct current (HVDC) cable is an important part in the electric power transmission and distribution systems. However, very little research has been carried out on partial discharge under direct current (DC) conditions. Niemeyer’s model has been widely used under alternating current (AC) conditions. This paper aims to intend to modify the Niemeyer’s model considering both electric field and charge dynamics under DC conditions, and therefore proposes a numerical model describing partial discharge characteristics in HVDC cable.

Design/methodology/approachThis paper intends to understand partial discharge characteristics under DC conditions through numerical modelling. Niemeyer’s model that has been widely used under AC conditions has been modified, taking both electric field and charge dynamics under DC conditions into consideration. The effects of loading level or current through the conductor, cavity location and material properties on partial discharges have also been studied.

FindingsElectrical conductivity is important in determining the characteristics of partial discharge under DC conditions and discharges tend to happen in short when the cavity field exceeds the inception level under the parameter values studied in the paper.

Research limitations/implicationsBuilding the numerical model is the purpose of the paper, and there is lack in experiment and the comparison between the simulation results and experiment.

Practical implicationsThe proposed model provides the numerical model describing partial discharge in HVDC cable and helps understand the partial discharge mechanism under DC voltage.

Originality/valueTo the best of the author’s knowledge, this paper is a very early research on the numerical modelling work on partial discharge under DC voltage.
An energy-efficient scalar control taking core losses into account
Authors: Khoury Gabriel , Ghosn Ragi , Khatounian Flavia , Fadel Maurice , Tientcheu Mathias 
Published: January 2018

PurposeIn the need to optimize the energy efficiency, control structures can have a positive effect by tracking the optimal operating point according to the speed and mechanical load of the motor. The purpose of this paper is to present an energy-efficient scalar control for squirrel-cage induction motors (IMs), taking into consideration the effect of core losses.

Design/methodology/approachThe proposed technique is based on the modification of the stator flux reference, to track the best efficiency point. The optimal flux values are computed through an improved model of the IM including core losses, then stored in a look-up table.

FindingsSimulations of the proposed scalar control are carried out, and results show the efficiency improvement when the flux is optimized especially at low load cases. Results were validated experimentally on two motors compliant with different efficiency standards.

Practical implicationsThe proposed approach can be used in several fields and applications using the scalar-controlled IM with a proper implementation in variable speed drives, as in the cases of pumps, compressors and blowers.

Originality/valueThe proposed technique is compared to existing optimization methods in literature, and the results show an improvement in the dynamic performance and in the response delays. The approach is also compared to an optimization technique used in industries like Leroy-Somer for variable speed drives, and efficiency improvements are shown.
Design and simulation of electro-thermal compliant MEMS logic gates
Authors: P. Pandiyan , G. Uma , M. Umapathy 
Published: January 2018

PurposeThe purpose of this paper is to design an out-of-plane micro electro-thermal-compliant actuator based logic gates which work analogously to complementary metal oxide semiconductor (CMOS) based logic gates. The proposed logic gates used a single-bit mechanical micro ETC actuator per logic instead of using 6-14 individual transistors as in CMOS.

Design/methodology/approachA complete analytical modelling is performed on a single ETC vertical actuator, and a relation between the applied voltage and the out-of-plane deflection is derived. Its coupled electro-thermo-mechanical analysis is carried out using micro electro mechanical system (MEMS) CAD tool CoventorWare to illustrate its performance.

FindingsThis paper reports analytical and numerical simulation of basic MEMS ETC actuator-based logic gates. The proposed logic gate operates on 5 V, which suits well with conventional CMOS logic, which in turn reduces the power consumption of the device.

Originality/valueThe proposed logic gates uses a single-bit MEMS ETC actuator per logic instead of using more transistors as in CMOS. The unique feature of this proposed logic gates is that the basic mechanical ETC actuator is customized in its structure to function as specific logic gates depending upon the given inputs.
What’s best for whom? The effect of product gender depends on positioning
Authors: Schnurr Benedikt 
Published: January 2018

Purpose
This paper aims to investigate how product positioning affects the influence of product gender on consumers’ product evaluations.

Design/methodology/approach
Using experimental designs, this research investigates how hedonic versus functional consumption goals affect consumers’ choice between feminine and masculine products (Study 1) and how positioning products as either hedonic or functional influences consumers’ evaluations of feminine and masculine products (Studies 2 and 3).

Findings
When pursuing hedonic consumption goals, consumers are more likely to choose feminine (vs masculine) products, whereas when pursuing functional consumption goals, consumers are more likely to choose masculine (vs feminine) products. Further, consumers evaluate feminine products more favorably when the products are hedonically (vs functionally) positioned, whereas they evaluate masculine products more favorably when the products are functionally (vs hedonically) positioned. Perceptions of product credibility mediate this effect.

Research limitations/implications
Connecting theories of gender identity, product positioning and congruity, this study extends previous literature by demonstrating that the effects of product gender are context-dependent.

Practical implications
Many companies use visual design cues (e.g. shape, color) to promote their products’ gender. The findings of this study suggest that companies promoting their products as feminine should highlight the products’ hedonic benefits, whereas companies promoting their products as masculine should highlight the products’ functional benefits.

Originality/value
Applying a conceptual congruity approach, this research is the first to demonstrate that the effects of product gender on consumers’ product evaluations depend on the product’s positioning.
Internalizing the spirit of entrepreneurship in early childhood education through traditional games
Authors: Jufri Muhammad , Wirawan Hillman 
Published: January 2018

Purpose
The purpose of this paper is to develop entrepreneurship games for early childhood education (ECE) and to develop a module using a number of systematic approaches.

Design/methodology/approach
There were two studies conducted. Study 1 focused on developing guidelines for traditional games. The games were collected and selected based on their entrepreneurial characteristics. In study 2, the authors selected eight relevant traditional games and then examined their effectiveness at internalizing the spirit of entrepreneurship. For the assessment, the authors trained 40 expert raters from the fields of psychology, ECE, and entrepreneurship studies.

Findings
The results showed that two groups of raters agreed (k=0.64) that the games were effective for internalizing the spirit of entrepreneurship in ECE. In the second part of the study, the authors intended to develop a set of multimedia digital instructions and guidelines for users (e.g. teachers and instructors) as the traditional games provided no written instructions. This study produced the multimedia digital instructions and constructed a set of assessment tools for the teachers to test the effectiveness of the games.

Research limitations/implications
This study focused on developing traditional games into a structured guideline for teachers. However, further investigation is still necessary to gather evidence regarding the validity of the game manual. Future study should focus on testing the effect of the games on ECE as well as students’ entrepreneurial traits.

Originality/value
This study created a new approach by considering local values in developing an entrepreneurship intervention.
Team trust and control in new venture emergence
Authors: Williams Middleton Karen , Nowell Pamela 
Published: January 2018

PurposeEffective internal dynamics of new venture teams is seen as a key contributor to venture success. The purpose of this paper is to investigate the ways in which new venture teams consisting of nascent entrepreneurs initiate trust and control during venture emergence.Design/methodology/approachDimensions of trust and control are developed into an analytical framework applied to documented team norms. Coding detects frequency of trust and control dimensions. Supplementary data triangulate findings and explore follow-on effects in team dynamics and venture emergence.FindingsFrequency of coded dimensions generates a venture team profile. Teams prime their dynamics through use of trust and/or control language in documented norms. Priming is seen to influence entrepreneurial perseverance during venture emergence, stemming either directly from team dynamics, or indirectly from key shareholder relationships or environmental conditions.Research limitations/implicationsData are bounded to a specific contextual setting representing incubation and education, where the nascent entrepreneurs are simultaneously students. The complexity of venture emergence means that multiple factors influencing new venture teams may influence trust and control in ways currently unaccounted for.Practical implicationsExploration of trust and control during venture emergence emphasizes soft-skills critical to entrepreneurial perseverance and venture success. Team norms can be designed to prime toward trust or control, and can be indicative of teams’ sensitivity to external factors, enabling evidence for intervention.Originality/valueThe paper illustrates ways in which trust and control influence team dynamics during venture emergence.
Assessing the efficiency of environmental regulations of large-scale enterprises based on extended fuzzy data envelopment analysis
Authors: Wang Shuhong , Yu Hui , Song Malin 
Published: January 2018

Purpose
As the functions of environmental regulations cannot be quantified while assessing their environmental efficiency, there has been no comprehensive evaluation of environmental efficiency. The purpose of this paper is to evaluate environmental regulations based on triangular and trapezoidal fuzzy numbers.

Design/methodology/approach
This paper uses L-R fuzzy numbers to transform the evaluation language into triangular fuzzy numbers, and adopts an α-level flexible slacks-based measurement model to evaluate the performance of these regulations. Trapezoidal fuzzy numbers are combined with a data envelopment analysis model, and an α-slack-based measurement (SBM) model is used to evaluate the environmental efficiency. The α-SBM model is confirmed to be stable and sustainable.

Findings
Relevant index data from 16,375 enterprises were collected to test the proposed model, and models corresponding to triangular fuzzy numbers and trapezoidal fuzzy numbers were used to evaluate their environmental efficiency. Comparative results showed that the proposed model is feasible and stable.

Originality/value
The main contributions of this study are twofold. First, this paper provides a valuable evaluation method for environmental regulation. Second, our research improves the practical performance of trapezoidal fuzzy data envelopment analysis and enhances its feasibility and stability.
Islam, communication and accounting
Authors: Husein UmmeSalma Mujtaba 
Published: January 2018

PurposeThis paper aims to explore the notion of communication in accounting and in doing so elucidates the wider connotation of accounting frontiers offered in the Islamic philosophy, reflecting upon the Islamic doctrines that are indicative towards and offer a variety of implications for communication and accounting.Design/methodology/approachDrawing from the Islamic sources – Quran and other key texts – and other relevant preceding literature, the paper deliberates key Islam principles of significance and outline what they suggest for communication in accounting.FindingsIslam has a profoundly embedded concern of the communicative aspect from a holistic viewpoint that is clear within its accounting implications as well. This paper illustrates the social aspects of Islamic accounting through its stance on communication, thereby opening up the more enabling potentials of Islamic accounting informed by wider and more facilitating dimensions of Islam’s teachings: Islam’s holistic approach to life; its attentiveness on society and its various groups; and its emphasis on behavioural conduct and emotional aspects. Consideration on these principles throws into questions the Western ways, develops and hones the existing stand of hegemonic positions and submits new ways forward.Research limitations/implicationsAspiring organisations and larger entities such as nations who encourage the development of Islamic economy can benefit from the added accountability of entities to encompass the social and ethical responsibilities.Practical/implicationsThe paper highlights Islamic doctrines as a basis of just and responsible accounting communication via incorporating the macro-societal elements and the behavioural communicative aspects.Originality/valueThe Islamic communication principles open up the inclusion of the missing behavioural aspect from accounting communication. This paper provides the necessary theoretical framework on how to include the humane side within accounting communication.
Selective intercultural sensitivity to different sources of cultural identity
Authors: Tabatadze Shalva , Gorgadze Natia 
Published: January 2018

Purpose
The purpose of this paper is to assess the intercultural sensitivity of students in teacher educational programs at higher education institutes (HEIs) in Georgia.

Design/methodology/approach
This research explored the intercultural sensitivity among 355 randomly selected students in teacher education programs at higher education institutions in Georgia. A questionnaire based on the Development Model of Intercultural Sensitivity (DMIS) and Cushner et al. (2006) model of sources of cultural identity was developed as a research instrument and adjusted to the Georgian context to measure the students’ intercultural sensitivity.

Findings
The results showed that a majority of the students were in the ethnocentric phase of intercultural sensitivity, as defined by Bennett (1993); students in teachers’ educational programs were selectively sensitive to different sources of cultural identity; students were selectively tolerant to different groups in the population with the same source of cultural identity and the level of educational attainment, as well as the location of the higher education institution affected students’ level of intercultural sensitivity.

Practical implications
The findings of this study carry valuable practical importance as they can be used to improve teacher education programs at higher education institutions in Georgia.

Originality/value
The study has scientific value in that the instrument used to assess intercultural sensitivity was developed for the Georgian context, and students’ intercultural sensitivity to 12 different sources of cultural identity was investigated.