bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three-phase four-wire shunt active power filter working simultaneously as energy conditioner
Authors: Szromba Andrzej 
Published: March 2017

Purpose
The purpose of this study is to find a control method for three-phase four-wire shunt active power filters, which uses a load-equivalent conductance for obtaining a reference signal for compensating non-active current.

Design/methodology/approach
Changes of energy stored in an active filter’s reactance elements are monitored to find the active component of the load current. It is then used as a current reference to be realised as a supply source current. Computer simulation methods were used to verify the presented control method.

Findings
To calculate the reference signal for the active filter action, it is enough to measure the active filter’s DC-side capacitors’ voltages. It has been proved that P regulators are sufficient to realise compensating current and to stabilise active filter capacitors’ voltages. The supply source-neutral conductor current can be zeroed even for nonlinear and unbalanced load-generating DC-component in its neutral conductor. In addition, the active filter can buffer load-active power changes and act simultaneously as a local energy accumulator.

Originality/value
This paper provides an alternative approach to address the problem of the three-phase four-wire shunt active power filter control methods.
Comparison of static hysteresis models subject to arbitrary magnetization waveforms
Authors: Petrun Martin , Steentjes Simon , Hameyer Kay , Dolinar Drago 
Published: March 2017

Purpose
This paper aims to compare different static history-independent hysteresis models (mathematical-, behavioural- and physical-based ones) and a history-dependent hysteresis model in terms of parameter identification effort and accuracy.

Design/methodology/approach
The discussed models were tested for distorted-excitation waveforms to explore their predictions of complex magnetization curves. Static hysteresis models were evaluated by comparing the calculated and measured major and minor static hysteresis loops.

Findings
The analysis shows that the resulting accuracy of the different hysteresis models is strongly dependent on the excitation waveform, i.e. smooth excitations, distorted flux waveforms, transients or steady-state regimes. Obtained results show significant differences between predictions of discussed static hysteresis models.

Research limitations/implications
The general aim was to identify the models on a very basic and limited set of measured data, i.e. if possible using only the measured major static loop of the material. The quasi-static major hysteresis loop was measured at Bmax = 1.5 T.

Practical/implications
The presented analysis allows selection of the most-suited hysteresis model for the sought-for application and appraisal of the individual limitations.

Originality/value
The presented analysis shows differences in intrinsic mechanisms to predict magnetization curves of the majority of the well-known static hysteresis models. The results are essential when selecting the most-suited hysteresis model for a specific application.
Creep strain rates analysis in cylinder under temperature gradient materials by using Seth’s theory
Authors: Thakur Pankaj , Gupta Nishi , Bir Singh Satya 
Published: March 2017

Purpose
The purpose of this paper is to present study of creep strain rates in a circular cylinder under temperature gradient materials by using Seth’s transition theory.

Design/methodology/approach
Seth’s transition theory is applied to the problem of creep stresses and strain rates in a cylinder under temperature gradient materials by finite deformation. Neither the yield criterion nor the associated flow rule is assumed here. The results obtained here are applicable to compressible materials. If the additional condition of incompressibility is imposed, then the expression for stresses corresponds to those arising from Tresca yield condition.

Findings
Thermal effect increases the values of axial stress at the external surface of a circular cylinder for incompressible material as compared to compressible materials. With the introduction of thermal effects, the maximum value of strain rates occurs at the external surface for incompressible material as compared to the compressible materials.

Originality/value
The model proposed in this paper is used commonly either as pressure vessels intended for storage industrial gases or media transportation of high pressurized fluids and the design of turbine rotors.
Computation of coupled effects of root and shoot characteristics on transpiration based on optimization approach
Authors: Zhou Wan-Huan , Garg Ankit , Garg Akhil 
Published: March 2017

Purpose
Water balance is measured by transpiration, which has a significant impact on the performance of geotechnical infrastructure (vegetated slopes), ecological infrastructure (wetlands), urban infrastructure (green roof, biofiltration units) and agricultural infrastructure. Past studies have formulated models using analytical modeling to evaluate the transpiration index based on energy balance and suction. In circumstance of impartial and uncertain information about the root and shoot properties and its effect on the transpiration index, the present work aims to introduce the new optimization algorithm of genetic programming (GP) to quantify and optimize the transpiration index of plant.

Design/methodology/approach
The GP framework, having objective function of structural risk minimization, is used for formulating the transpiration index model. The statistical metrics with 2D and 3D analyses of the models are conducted to determine its accuracy and understand the transpiration process.

Findings
The model analysis reveals that the proposed model extrapolates the transpiration index values accurately based on five inputs. 2D and 3D relationships between the transpiration index and the five inputs suggest that the total root area has the highest impact on the transpiration index followed by shoot length and root biomass. There is not much impact of the shoot mass and stem basal diameter on the transpiration index. It was also found that the transpiration index increases with an increase in total root area and root biomass.

Originality/value
This work is a first-of-its-kind study involving the extensive computation analysis for quantifying and optimizing the transpiration index of the soil for the complex civil systems.
Semi-analytical and semi-numerical method for the single soil layer consolidation problem
Authors: Cheng Tao , Yan Keqin , Zheng Jun-Jie , Luo Xian-Feng , Zhang Ding-Bang , Xu Wan-Hui , Hu Ren-Jie , Zhang Yi 
Published: March 2017

PurposeThis paper aims to present a simplified solution method for the elasto-plastic consolidation problem under different stress paths.Design/methodology/approachFirst, a double-yield-surface model is introduced as the constitutive model framework, and a partial derivative coefficient sequence is obtained by using numerical approximation using Gauss nuclear function to construct a discretization constitutive model which can reflect the influence of different stress paths. Then, the model is introduced to Biot’s consolidation theory. Volumetric strain of each step as the right-hand term, the continuity equation is simplified as a Poisson equation and the fundamental solution is derived by the variable separation method. Based on it, a semi-analytical and semi-numerical method is presented and implemented in a finite element program.FindingsThe method is a simplified solution that is more convenient than traditional coupling stiffness matrix method. Moreover, the consolidation of the semi-infinite foundation model is analyzed. It is shown that the numerical method is sufficiently stable and can reflect the influence of stress path, loading distribution width and some other factors on the deformation of soil skeleton and pore water pressure.Originality/valueOriginal features of this research include semi-numerical semi-analytical consolidation method; pore water pressure and settlements of different stress paths are different; maximum surface uplift at 3.5a; and stress path is the main influence factor for settlement when loading widtha> 10 m.
Fluid mechanics and sound generation for lung-clearance therapy
Authors: Gorman John , Sparrow Eph , Krautbauer Kevin 
Published: March 2017

Purpose
The study described here aims to set forth an analysis approach for a specific biomedical therapeutic device principally involving fluid mechanics and resulting sound generation. The function of the therapeutic device is to clear mucus from the airways of the lungs. Clearance of the airways is a primary means of relief for cystic fibrosis and is also effective in less profound dysfunctions such as asthma. The complete system consists of a device to periodically pulse air pressure and a vest that girdles the abdomen of the patient and receives and discharges the pulsating airflow. The source of pulsed air can be tuned both with respect to the amplitude and frequency of the pressure pulsations.

Design/methodology/approach
The key design tools used here are computational fluid dynamics and the theory of turbulence-based sound generation. The fluid flow inside of the device is multidimensional, unsteady and turbulent.

Findings
Results provided by the fluid mechanic study include the rates of fluid flow between the device and the inflatable vest, the rates of air supplied to and extracted from the device, the fluid velocity magnitudes and directions that result from the geometry of the device and the magnitude of the turbulence generated by the fluid motion and the rotating component of the device. Both the velocity magnitudes and the strength of the turbulence contribute to the quantitative evaluation of the sound generation.

Originality/value
A comprehensive literature search on this type of therapeutic device to clear mucus from the airways of the lungs revealed no previous analysis of the fluid flow and sound generation inside of the device producing the pulsed airflow. The results presented in this paper pinpoint the locations and causes of sound generation that can cause audible discomfort for patients.
Ontario school principals and diversity: are they prepared to lead for equity?
Authors: Tuters Stephanie , Portelli John 
Published: March 2017

Purpose
Ontario is the most ethnically diverse province in Canada. School educators cannot disregard the reality of diversity in all its senses. The question that directs the focus of this paper is: to what extent are leaders in Ontario formally prepared to lead schools that support the students of today? The paper aims to discuss this issue.

Design/methodology/approach
This paper results from a document analysis of publicly available documents to investigate the current context in Ontario, Canada regarding the educational and social situation of new immigrants, immigration, refugees, and ethno-culturally diverse students. It includes an exploration of the training and information available for principals and vice principals in Ontario to support them in leading schools which serve increasingly diverse student bodies. This paper is also informed by interviews with 59 educational leaders from Ontario and the USA. Interviews centred around their experiences engaging in practices to support their diverse student populations.

Findings
Results of the data analysis regarding the supports and training available to assist educational leaders in supporting the learning needs of diverse student populations demonstrate a serious lack of support. Very few actual resources exist for leaders, and most of those that do exist are connected to agencies outside of the education system, such as Settlement services.

Research limitations/implications
Recent research investigating the relationship between identities and educational experience and teaching points to the importance of in-depth and targeted approaches to teacher preparation, and leadership preparation to help provide teachers and leaders with the knowledge, dispositions, and skills required to support all students in their academic and social development (Cochran Smith et al., 2009). This study confirms such findings. Given the current situation in Ontario and much of North America, there is a great need for leadership preparation programming, and school-level resources that provide educational leaders with the knowledge and skills to support all students in their academic and social development, but also in helping educational leaders to understand and address the systemic nature and forms of discrimination which their students face daily.

Practical implications
With very few school boards requiring leaders to have a Masters’ degree in Education, and none having stipulations regarding course content. This leaves educational leaders unprepared to deal with the reality of their situations, leading to the perpetuation of inequities in Ontario schools.

Originality/value
Although sparse, previous research into the state of support and preparation for administrators and educators with regard to diverse student populations in Ontario revealed that little to no preparation or support exists (see e.g. Price, 2002). This study helps to fill that gap in existing research.
One against the grain
Authors: Johnson Santamaria Lorri , Peter Santamaria Andres , Singh Gurdev Kaur Pritam 
Published: March 2017

Purpose
The purpose of this paper is to reframe transformative and culturally sustaining leadership for a diverse global society by addressing the need for educational systems to better serve people of color, situated in the urban Auckland area of Aotearoa New Zealand (NZ), who have been marginalized by the societies to which they immigrate.

Design/methodology/approach
Grounded in an applied critical theoretical framework, this qualitative inquiry uses raw auto-ethnographical data gleaned from a case study featuring the voice of Deva, a Malaysian Punjabi woman educator, who is also an aspiring school leader. In aspects of her auto-ethnography, she candidly shares experiences of racism, discrimination, and oppression germane to her professional educational experiences in Aotearoa NZ.

Findings
Findings inform practice and policy to foster more inclusive school improvement in a bicultural and increasingly multicultural context that has historically recognized Maori (indigenous to Aotearoa NZ), Pakeha (of European descent), and Pacific Islander (e.g. Samoa, Tonga, Fiji, Niue, Cook Islands) achievement in a national context. Global and international implications are included.

Originality/value
This contribution presents a unique perspective showcasing Deva’s direct experiences with acknowledgment of and professional positioning around Te Tiriti o Waitangi – The Treaty of Waitangi, the principles of which are now being applied not only to the rights of Maori and Pakeha, but also Pacific Islander and immigrants to the country.
The socio-economic impacts of AIDS on families caring for AIDS-orphaned children in Mbeya rural district, Tanzania
Authors: Fauk Nelsensius Klau , Mwakinyali Silivano Edson , Putra Sukma , Mwanri Lillian 
Published: March 2017

Purpose
The purpose of this paper is to explore the socio-economic impacts of AIDS on families caring for AIDS-orphaned children in Mbeya rural district, Tanzania.

Design/methodology/approach
A qualitative inquiry employing one-on-one in-depth interviews was conducted in 2015. Purposive sampling technique was used to recruit participants (n=24) comprising 20 heads of families caring for AIDS-orphaned children, two local government staff and two staff from Isangati Agricultural Development Organisation – a non-government organisation. Qualitative data were analysed using thematic and framework approach.

Findings
Results demonstrated that families caring for AIDS-orphaned children experienced severe socio-economic impacts of the epidemic. Reduction in household savings, increase in living expenses on health care and increased education fees were the identified economic impacts on these families. Social impacts included labour shortage, withdrawal of children from school and increased demand for food.

Social implications
There is a need for urgent responses and for scaling up programmes delivered by organisations, institutions and the government of Tanzania to help families cope with these impacts.

Originality/value
This study provides evidence on socio-economic impacts of AIDS on families caring for AIDS-orphaned children in Tanzania. An understanding of these impacts can help governmental and non-governmental institutions and programme planners to address the problem in their policies and develop evidence-based strategies and interventions in responding to the problem in Mbeya and Tanzania. Moreover, responses to reducing the impacts of AIDS on families require a holistic approach that encourages the involvement of all sectors and agents outside of the health sector.
Evaluating service quality in the higher education sector in Iran: an examination of students’ perspective
Authors: Rezaei Satar , Karami Matin Behzad , Hajizadeh Mohammad , Soroush Ali , Mohammadi Zahra , Babakhany Maryam , Jamshidi Khadije 
Published: March 2017

Purpose
Education is a human right and access to high quality education is key to sustainable socioeconomic development. Improving the quality of higher education institutes is essential for generating the productive human resources. Assessing the quality of higher education from the students’ perspective can be considered a crucial factor in the monitoring of service quality in universities. The purpose of this paper is to evaluate the quality of educational services in a higher education institute, the Kermanshah University of Medical Sciences (KUMS), in the west of Iran.

Design/methodology/approach
A multistage sampling method was used to select 346 students from the KUMS, who were enrolled in the second semester of the academic year 2015-2016. The SERVQUAL questionnaire was used to gather data on students’ perceptions and their expectations about the quality of educational services. The authors used a statistical significance level of 0.05 to examine the gap between the students’ expectations and their perceptions of service quality in five dimensions, namely tangibles, responsiveness, reliability, empathy and assurance.

Findings
The results showed that there was a negative service quality gap in all five dimensions. The overall mean score of students’ expectations and their perceptions was 3.19±0.44 and 2.4±0.45, respectively. The score gap between the overall mean score of perceptions and expectations of students was −0.79, which was statistically significant (p<0.0001). The highest and lowest quality gaps were related to the assurance (−0.84) and tangible (−0.70) dimensions, respectively.

Originality/value
The study indicated that the quality of educational services provided in the KUMS did not meet students’ expectations in five dimensions of service quality. Thus, it warrants further investigations to determine how to improve the quality of educational services in higher education institutes such as the KUMS.
Investigation into the hierarchical nature of TQM variables using structural modelling
Authors: Veltmeyer Johan , Mohamed Sherif 
Published: March 2017

Purpose
The purpose of this paper is to provide the empirical evidence supporting the existence of a multi-level hierarchical TQM model showing the structural inter-relationships among a total of 16 TQM variables (i.e. drivers, enablers and outcomes).

Design/methodology/approach
The set of identified TQM variables is the product of an in-depth review of the literature, and a robust reiterative process of verification and validation. Inter-relationships among the TQM variables were subjected to the scrutiny of a panel of experts, and were used as a basis for developing a web-based survey to explore the existence as well as strength of the structural relationship between each and every pair of the identified variables using interpretive structural modelling and MICMAC (Impact Matrix Cross-Reference Multiplication Applied to a Classification).

Findings
TQM variables were classified and clustered based on their influence and dependence on each other. Variables such as commitment by top management and customer satisfaction appear to have a strong chance to affect change, whereas variables such suppliers and competitors are very dependent on, and sensitive to, the evolution of the influent variables.

Originality/value
The paper demonstrates a multi-level TQM model encompassing all identified TQM drivers, enablers, and outcomes. The paper not only addresses a gap in the relevant literature (reduces the evidence scarcity about the hierarchical nature of TQM variables), but also gives insights into the variables with most driving power needing greater management attention.
Understanding negative emotions in services through teleological actions
Authors: Padin Carmen , Svensson Göran 
Published: March 2017

Purpose
The purpose of this paper is to conceptualize and describe how service providers’ and service receivers’ teleological actions relate to negative emotions after critical incidents in service encounters have occurred.

Design/methodology/approach
Three categories of teleological actions are used: transformative – ad hoc and present-based actions, formative – pre-determined and past-based actions and rationalist – goal-directed and future-based actions.

Findings
The empirical findings indicate that airline ground staff should interact differently with air passengers based on the negative emotions involved and the teleological actions undertaken after critical incidents in service encounters have occurred.

Research limitations/implications
The current research improves the interactive and sequential understanding of how to manage negative emotions through teleological actions in service encounters between a service provider and a service receiver after critical incidents have occurred, as well as providing numerous opportunities for further research in services.

Practical implications
It is an important and relevant insight that it is necessary to understand both the initial and derived causes of negative emotions and the subsequent effects and outcomes occurring in service encounters after critical incidents have arisen.

Originality/value
This current study provides theoretical and managerial contributions to manage negative emotions after critical incidents have occurred in service encounters.