bluuebunny/crossref_metadata_2025_split huggingface dataset:
Emotional intelligence and transformational leadership behaviours of construction project managers
Authors: Potter Emily M. , Egbelakin Temitope , Phipps Robyn , Balaei Behrooz 
Published: February 2018

Purpose
Existing research has highlighted the need for influential leaders to respond to the evolving social, economic and environmental constraints on the construction industry. Studies on leadership in other sectors have shown that influential leaders tend to demonstrate a high level of emotional intelligence. Little or no research examining relationships between leadership style and emotional intelligence has been conducted specific to construction project managers. This study aims to identify the prevalent leadership style adopted by construction project managers and investigate potential correlations between leadership style and emotional intelligence.

Design/methodology/approach
An online questionnaire including a mix of open and closed questions was adopted to address the research objectives. The group studied comprised project managers currently working in the construction industry in New Zealand and the UK.

Findings
The research found that transformational leadership style is prevalent among project managers examined in this study. Significant positive relationships were found between project managers’ emotional intelligence and their likelihood of adopting a transformational leadership style.

Originality/value
The research results provide the construction industry with a benchmark against which individuals with high emotional intelligence, and so most suited to the challenges of the project management role, can be identified and trained. Recommendations including suitable methods for identifying, recruiting and training project managers, as well as secondment and mentoring options, were suggested for improving leadership capabilities in the construction industry.
Quality of work life of Emirati women and its influence on job satisfaction and turnover intention
Authors: Jabeen Fauzia , Friesen Heather Lynn , Ghoudi Kilani 
Published: February 2018

PurposeThe purpose of the paper is to examine the quality of work life (QoWL) and its influence on job satisfaction and turnover (job-leaving) intention of Emirati women employed in various public sector organizations in the United Arab Emirates (UAE).Design/methodology/approachData were collected through a structured questionnaire gleaned from literature, and were analyzed through partial least squares structural equation modeling.FindingsQoWL was found to have a significant relationship with all variables in the model, and was found, as hypothesized, to have a positive effect on job satisfaction and a negative effect on turnover intention.Research limitations/implicationsOne of the main limitations of this study is that the sample is drawn from only Emirati female employees who were working in public organizations based in the Abu Dhabi region, the capital of UAE, and hence, cannot be generalized.Practical implicationsThis study helps policy makers by identifying crucial points that can improve Emirati female employees’ QoWL with a commensurate reduction in turnover intention in a collectivistic society. Public sector organizations should address the factors that directly affect Emirati women’s QoWL and job satisfaction, as it will ultimately result in less staff turnover, greater productivity, and will also support the localization strategy.Originality/valueThe study is one of the first enquiries which stresses the importance of understanding how Emirati female employees perceive and categorize themselves as a valuable element of the workplace alongside the significance of augmenting their sense of belongingness to their organization.
Organizational network and strategic business performance
Authors: Yousaf Zahid , Majid Abdul 
Published: February 2018

Purpose
The purpose of this paper is to address the key issues, how organizational networks influence the strategic business performance (SBP) through the mediating role of organizational flexibility, and the moderating role of entrepreneurial orientation (EO). Contextualizing small and medium enterprises in developing countries, the authors have developed and tested a theoretical model of SBP to provide a framework for analyzing its major antecedents.

Design/methodology/approach
This research used a quantitative approach with cross-sectional data. The authors used correlation, regression and Baron and Kenny Approach (Causal Step Approach) for analyzing the data collected from 737 CEOs/MDs/owners of different small and medium enterprises to test the theoretical model developed for this study.

Findings
Findings revealed that organizational flexibility mediates the relationship between organizational network and SBP. Furthermore, stronger EO strengthens the relationship between organizational flexibility and SBP.

Originality/value
This study contributes in two ways: first, it provides empirical evidences that how to flourish the mechanism of SBP in SMEs. Second, this work contributes to understand the effects of organizational networks, flexibility and EO on SBP.
A 0.079 mm2 2.1-to-4.2 GHz ring-VCO employing programmable current topology
Authors: Awais Muhammad , Ramiah Harikrishnan , Lim Chee-Cheow , Chuah Joon Huang 
Published: February 2018

Purpose
The purpose of this work in designing a wideband ring voltage-controlled oscillator (VCO) based on programmable current topology. It occupies a very tiny area yet achieving a good phase noise performance, which is suitable to be implemented in cost-effective and wideband frequency synthesizers.

Design/methodology/approach
The tuning range and gain are improved by dividing the VCO tuning curve into multiple curves controlled by programmable current sources without introducing additional parasitic capacitance.

Findings
Fabricated in 130-nm standard complementary metal oxide semiconductor technology and occupying an area of 0.079 mm2, the VCO is tunable from 2.05 to 4.19 GHz, with a tuning percentage of 68.5 per cent. The VCO measures a phase noise performance of −96.7 dBc/Hz at an offset of 1 MHz from a 4.19 GHz carrier while consuming an average current of 6.5 mA, achieving figure of merit (FoM) and FoMT of −158.9 and −175.6 dBc/Hz, respectively.

Originality/value
The proposed design uses programmable current topology without introducing parasitic capacitance, hence achieving wideband operation. It also occupies a tiny area and achieves a good phase noise performance.
High power 3-bit GaN high-pass/low-pass phase shifter for X-band applications
Authors: Sun Pengpeng , Liu Hui , Geng Miao , Zhang Rong , Yuan Tingting , Luo Wei Jun 
Published: February 2018

Purpose
The design and performance of X-band high power 3-bit phase shifter which has been fabricated in 0.25µm GaN HEMT technology are presented.

Design/methodology/approach
Each bit of this phase shifter design is based on high-pass/low-pass topology.

Findings
For all eight states, the insertion loss is 12.5 ± 2.5 dB from 8-10 GHz and the input return loss is better than 9 dB over 8-10 GHz. The 3-bit phase shifter achieves a RMS phase error of 1o at 8.5 GHz and a RMS amplitude error less than 1.1dB. The measured continuous wave power data demonstrates typical input RF power handing capability of 32 dBm at 8 GHz.

Originality/value
This is to the authors’ knowledge the first published results of 3-bit AlGaN/GaN phase shifter.
A process for estimating minimum feature size in selective laser sintering
Authors: Weiss Benjamin , Diegel Olaf , Storti Duane , Ganter Mark 
Published: February 2018

Purpose
Manufacturer specifications for the resolution of an additive manufacturing (AM) machine can be ten times smaller (more optimistic) than the actual size of manufacturable features. Existing methods used to establish a manufacturable design rule-set are conservative piecewise-constant approximations. This paper aims to evaluate the effectiveness of a first-order model for producing improved design rule-sets for feature manufacturability, accounting for process variation.

Design/methodology/approach
A framework is presented which uses an interpolation method and a statistical model to estimate the minimum size for a wide range of features from a set of iterative experiments.

Findings
For an SLS process, using this approach improves the accuracy and reliability of minimum feature size estimates for a wider variety of features than assessed by most existing test artifacts.

Research limitations/implications
More research is needed to provide better interpolation models, broaden applicability and account for additional geometric and process parameters which significantly impact the results. This research focuses on manufacturability and does not address dimensional accuracy of the features produced.

Practical implications
An application to the design of thin channels in a prosthetic hand shows the utility of the results in a real-world scenario.

Originality/value
This study is among the first to investigate statistical variation of “pass/fail” features in AM process characterization, propose a means of estimating minimum feature sizes for shapes not directly tested and incorporate a more efficient iterative experimental protocol.
Predicting strength of additively manufactured thermoplastic polymer parts produced using material extrusion
Authors: Bartolai Joseph , Simpson Timothy W. , Xie Renxuan 
Published: February 2018

Purpose
The weakest point in additively manufactured polymer parts produced by material extrusion additive manufacturing (MEAM) is the interface between adjacent layers and deposition toolpaths or “roads”. This study aims to predict the mechanical strength of parts by utilizing a novel analytical approach. Strength predictions are made using the temperature history of these interfaces, polymer rheological data, and polymer weld theory.

Design/methodology/approach
The approach is validated using experimental data for two common 3D-printed polymers: polycarbonate (PC) and acrylonitrile butadiene styrene (ABS). Interface temperature history data are collected in situ using infrared imaging. Rheological data of the polycarbonate and acrylonitrile butadiene styrene used to fabricate the fused filament fabrication parts in this study have been determined experimentally.

Findings
The strength of the interfaces has been predicted, to within 10% of experimental strength, using polymer weld theory from the literature adapted to the specific properties of the polycarbonate and acrylonitrile butadiene styrene feedstock used in this study.

Originality/value
This paper introduces a novel approach for predicting the strength of parts produced by MEAM based on the strength of interfaces using polymer weld theory, polymer rheology, temperature history of the interface and the forces applied to the interface. Unlike methods that require experimental strength data as a prediction input, the proposed approach is material and build orientation agnostic once fundamental parameters related to material composition have been determined.
Formation and improvement of surface waviness for additive manufacturing 5A06 aluminium alloy component with GTAW system
Authors: Geng Haibin , Li Jinglong , Xiong Jiangtao , Lin Xin , Huang Dan , Zhang Fusheng 
Published: February 2018

Purpose
As known, the wire and arc additive manufacture technique can achieve stable process control, which is represented with periodic surface waviness, when using empirical methods or feedback control system. But it is usually a tedious work to further reduce it using trial and error method. The purpose of this paper is to unveil the formation mechanism of surface waviness and develop a method to diminish it.

Design/methodology/approach
Two forming mechanisms, wetting and spreading and remelting, are unveiled by cross-section observation. A discriminant is established to differentiate which mechanism is valid to dominate the forming process under the given process parameters.

Findings
Finally, a theoretical method is developed to optimize surface waviness, even forming a smooth surface by establishing a matching relation between heat input (line energy) and materials input (the ratio of wire feed speed to travel speed).

Originality/value
Formation mechanisms are revealed by observing cross-section morphology. A discriminant is established to differentiate which mechanism is valid to dominate the forming process under the given process parameters. A mathematical model is developed to optimize surface waviness, even forming a smooth surface through establishing a matching relation between heat input (line energy) and materials input (the ratio of wire feed speed to travel speed).
Geometric modeling of lattice structures for additive manufacturing
Authors: Savio Gianpaolo , Meneghello Roberto , Concheri Gianmaria 
Published: February 2018

Purpose
This paper aims to propose a consistent approach to geometric modeling of optimized lattice structures for additive manufacturing technologies.

Design/methodology/approach
The proposed method applies subdivision surfaces schemes to an automatically defined initial mesh model of an arbitrarily complex lattice structure. The approach has been developed for cubic cells. Considering different aspects, five subdivision schemes have been studied: Mid-Edge, an original scheme proposed by the authors, Doo–Sabin, Catmull–Clark and Bi-Quartic. A generalization to other types of cell has also been proposed.

Findings
The proposed approach allows to obtain consistent and smooth geometric models of optimized lattice structures, overcoming critical issues on complex models highlighted in literature, such as scalability, robustness and automation. Moreover, no sharp edge is obtained, and consequently, stress concentration is reduced, improving static and fatigue resistance of the whole structure.

Originality/value
An original and robust method for modeling optimized lattice structures was proposed, allowing to obtain mesh models suitable for additive manufacturing technologies. The method opens new perspectives in the development of specific computer-aided design tools for additive manufacturing, based on mesh modeling and surface subdivision. These approaches and slicing tools are suitable for parallel computation, therefore allowing the implementation of algorithms dedicated to graphics cards.
Application of fuzzy AHP – TOPSIS for ranking additive manufacturing processes for microfabrication
Authors: M.B. Anand , S. Vinodh 
Published: February 2018

Purpose
The purpose of this study is to rank additive manufacturing (AM) processes for microfabrication using integrated fuzzy analytic hierarchy process (AHP)-technique for order of preference by similarity to ideal solution (TOPSIS).

Design/methodology/approach
AM technology selection is formulated as multi-criteria decision-making (MCDM) problem and ranking is obtained using fuzzy AHP-TOPSIS. Five candidate processes considered are laser-induced forward transfer (LIFT), microstereolithography, micro-selective laser sintering (micro-SLS), inkjet, micro 3D printing.

Findings
Criteria weights are obtained using fuzzy AHP, and ranking is obtained using fuzzy TOPSIS. The top ranked criteria include material compatibility, geometrical complexity and minimum feature size. The ranking sequence is LIFT > microstereolithography > micro-SLS > inkjet > micro-3D printing.

Research limitations/implications
In the present study, ten criteria and five alternatives are used. In future, additional criteria and alternatives could be considered in line with technological advancements.

Practical implications
The generated ranking enabled the selection of appropriate AM process for microfabrication.

Originality/value
The application of hybrid MCDM approach for ranking AM processes for microfabrication is the contribution of the study.
Mandibular retrognathia correction using a fixed sagittal guidance appliance individually manufactured by selective laser melting manufacturing technology
Authors: Fekonja Anita , Zupancic Hartner Tjaša , Cretnik Andrej 
Published: February 2018

Purpose
Digitalization and additive manufacturing now play an important role in the manufacturing of medical and dental products. The purpose of this paper is to present the results of the treatment of skeletal Class II malocclusion in a growing patient using fixed sagittal guidance (FSG) appliance manufactured by digital and fast procedure by selective laser melting.

Design/methodology/Approach
This study present the case of a 14-year-old boy with a convex profile owing to a retrognathic mandible, an overjet (8 mm), a deep overbite (7 mm), a Class II canine, a molar relationship on both sides and an accentuated lower curve of Spee. The lateral cephalogram showed a skeletal Class II discrepancy with mandibular retrognathia, skeletal deep bite, reduced lower anterior facial height and proclined upper incisors. Treatment using FSG and fixed orthodontic appliance was performed within 15 months.

Findings
The final results show a well-balanced face and a nice profile. Protrusion of the maxillary anterior teeth was corrected, and a Class I molar relationship was achieved with proper overjet and overbite.

Research limitations/implications
The results from the proposed method are promising, although long-term results with a large group are not yet available.

Practical implications
Using an individually made FSG appliance from biocompatible material and an individualized treatment plan, an effective result in treating Class II malocclusion due to retrognathic mandible with favorable dentofacial effects has been achieved.

Originality/value
This is the first paper describing the use of additive manufacturing for orthodontic appliances in Slovenia.
A novel process planning algorithm for additive and subtractive manufacturing based on skeleton tree matching
Authors: Hao Jingbin , Chen Xin , Liu Hao , Ye Shengping 
Published: February 2018

Purpose
To remanufacture a disused part, a hybrid process needs to be taken in part production. Therefore, a reasonable machining route is necessary to be developed for the hybrid process. This paper aims to develop a novel process planning algorithm for additive and subtractive manufacturing (ASM) system to achieve this purpose.

Design/methodology/approach
First, a skeleton of the model is generated by using thinning algorithm. Then, the skeleton tree is constructed based on topological structure and shape feature. Further, a feature matching algorithm is developed for recognizing the different features between the initial model and the final model based on the skeleton tree. Finally, a reasonable hybrid machining route of the ASM system is generated in consideration of the machining method of each different sub-feature.

Findings
This paper proposes a hybrid process planning algorithm for the ASM system. Further, it generates new process planning insights on the hybrid process service provider market.

Practical implications
The proposed process planning algorithm enables engineers to obtain a proper hybrid machining route before product fabrication. And thereby, it extends the machining capability of the hybrid process to manufacture some parts accurately and efficiently.

Originality/value
This study addresses one gap in the hybrid process literature. It develops the first hybrid process planning strategy for remanufacturing of disused parts based on skeleton tree matching, which generates a more proper hybrid machining route than the currently available hybrid strategy studies. Also, this study provides technical support for the ASM system to repair damaged parts.
Review on processes and color quality evaluation of color 3D printing
Authors: Yuan Jiangping , Zhu Ming , Xu Baohui , Chen Guangxue 
Published: February 2018

Purpose
The purpose of this paper is provide a broad view for the standardization efforts of color quality evaluation of color 3D printing techniques. Further, this review paper demonstrates the processes and color properties of most color 3D printing techniques with specific devices and applications to extend the range of possible memberships of standardization group.

Design/methodology/approach
Six color 3D printing techniques including plastic-based, paper-based, powder-based, organism-based, food-based and metal-based color 3D printing have been introduced and illustrated with colorization principles and forming features in detail. Moreover, for printed 3D color objects, literature about color measurement, color specification and color reproduction are described and analyzed, respectively.

Findings
Four color 3D printing techniques including plastic-based, paper-based, powder-based and food-based color 3D printing show great affinity toward standardization of color quality evaluation, while their colorization principles indicate that it is difficult with a single standard frame. It is possible to develop a completed color quality evaluation standard for color 3D printing based on approaches in color 2D printing when color measurement method and devices are standardized together.

Originality/value
The paper provides an important guide focusing on the efforts to standardize the colorization processes and color quality evaluation of the color 3D printing techniques.
The hydraulic transfers “Setif-Hodna” to cope with impact of climate change on Setif high plains region
Authors: Bouregaa Tarek , Fenni Mohamed 
Published: February 2018

Purpose
The purpose of this paper is twofold: first, to show the impact of greenhouse gas emission scenarios on annual temperature and precipitation changes during three periods of the twenty-first century in Setif region by using two selected GCMs; and second, to show the importance of “Setif-Hodna” hydraulic transfers’ project, like a method to adapt to the water scarcity in the future.

Design/methodology/approach
This study investigates likely changes in annual temperature and precipitation over Setif high plains region (North-East of Algeria) under four Special Report on Emission Scenarios scenarios: A1B, B1, A2 and B2, between three time slices: 2030, 2060 and 2090. MAGICC-SCENGEN 5.3v.2 was used as a tool for downscaling the two selected general circulation models.

Findings
The projections of GFDLCM20 and GFDLCM21 indicate that annual temperature will increase under the four scenarios and across the three time slices. GFDLCM20 predictions indicate a general decrease in mean annual precipitation across the four scenarios, with average of −3.02, −2.47 and −1.07 percent in 2030, 2060 and 2090, respectively. GFDLCM21 show a high decrease, with values of −18.72, −27.2 and −31.9 percent across the three periods, respectively.

Originality/value
This work is one of the first to study the impact of greenhouse gas emission scenarios on annual temperature and precipitation changes over the region, and present the hydraulic transfers project “Setif-Hodna” like an adaptive strategy to limit the effect of water scarcity in this region.