bluuebunny/crossref_metadata_2025_split huggingface dataset:
Anderson acceleration for electromagnetic nonlinear problems
Authors: Filippini Mattia , Alotto Piergiorgio , Giust Alessandro 
Published: August 2019

Purpose
The purpose of this paper is to implement the Anderson acceleration for different formulations of eletromagnetic nonlinear problems and analyze the method efficiency and strategies to obtain a fast convergence.

Design/methodology/approach
The paper is structured as follows: the general class of fixed point nonlinear problems is shown at first, highlighting the requirements for convergence. The acceleration method is then shown with the associated pseudo-code. Finally, the algorithm is tested on different formulations (finite element, finite element/boundary element) and material properties (nonlinear iron, hysteresis models for laminates). The results in terms of convergence and iterations required are compared to the non-accelerated case.

Findings
The Anderson acceleration provides accelerations up to 75 per cent in the test cases that have been analyzed. For the hysteresis test case, a restart technique is proven to be helpful in analogy to the restarted GMRES technique.

Originality/value
The acceleration that has been suggested in this paper is rarely adopted for the electromagnetic case (it is normally adopted in the electronic simulation case). The procedure is general and works with different magneto-quasi static formulations as shown in the paper. The obtained accelerations allow to reduce the number of iterations required up to 75 per cent in the benchmark cases. The method is also a good candidate in the hysteresis case, where normally the fixed point schemes are preferred to the Newton ones.
Modeling and performance analysis of shunt active filter connected with photovoltaic system based on Z-source inverter
Authors: Teta Ali , Kouzou Abdellah , Rezaoui Mohamed Mounir 
Published: August 2019

Purpose
This paper aims to propose a new configuration of a shunt active power filter (SAPF) connected with a photovoltaic (PV) system through a Z-source inverter (ZSI) topology. This topology ensures a single-stage operation and overcomes the limitations of the conventional two-stage operation topologies based on the DC–DC boost converter. The proposed system is designed for the purpose of reducing the total harmonic distortion of the source current by eliminating the current harmonics and exploiting the solar irradiation.

Design/methodology/approach
First, all the main parts of the proposed shunt active power filter are fully described in this paper, and then a PV system based on a Z-source inverter with a maximum power point tracking controller is used to exploit the solar irradiance and solve the problem of discharging of the direct current (DC) capacitor during the filtering process.

Findings
From the extensive simulation tests carried out using MATLAB/Simulink, the obtained results prove that the proposed shunt active power filter performs well despite several operation scenarios, including different load types and under abrupt irradiance.

Originality/value
A new shunt active power filter configuration has been proposed. This configuration benefits from the solar irradiation and overcomes the drawbacks of the conventional configurations by using the Z-source inverter instead of the voltage source inverter and DC–DC boost converter.
Analysis of penalty parameters for interior penalty Galerkin methods
Authors: Straßer Sebastian , Herzog Hans-Georg 
Published: August 2019

Purpose
The purpose of this paper is to analyse the influence of penalty parameters for an interior penalty Galerkin method, namely, the symmetric interior penalty Galerkin method.

Design/methodology/approach
First of all, the solution of a simple model problem is computed and compared to the exact solution, which is a periodic function. Afterwards, a two-dimensional magnetostatic field problem described by the magnetic vector potential A is considered. In particular, penalty parameters depending on the polynomial degree, the properties of the elements and the material are considered. The analysis is performed by varying the polynomial degree and the mesh sizes on a structured and an unstructured mesh. Additionally, the penalty parameter is varied in a specific range.

Findings
Choosing the penalty parameter correctly plays an important role as the stability and the convergence of the numerical scheme can be affected. For a structured mesh, a limiting value for the penalty parameter can be calculated beforehand, whereas for an unstructured mesh, the choice of the penalty parameter can be cumbersome.

Originality/value
This paper shows that there exist different penalty parameters which can be taken into account to solve the considered problems. One can choose a global penalty parameter to obtain a stable solution, which is a sharp estimation. There has always to be the consideration to guarantee the coercivity of the bilinear form while minimising the number of iterations.
Simulating metallic contamination in permanent magnets used in magnetic sensors
Authors: Santos da Silva Safire Torres , Jerance Nikola , Rakotoarison Harijaona Lalao 
Published: August 2019

Purpose
The purpose of this paper is to provide a model for simulating contamination by ferromagnetic particles in sensors that use permanent magnets. This topic is especially important for automotive applications, where magnetic sensors are extensively used and where metallic particles are present, particularly because of friction between mechanical parts. The aim of the model is to predict the particle accumulation and its effect on the sensor performance.

Design/methodology/approach
Magnetostatic moment method is used to calculate particles' magnetization and magnetic field. Magnetic saturation is included and Newton–Raphson method is used to solve the non-linear system. Magnetic force on particles is calculated as a gradient of energy. Dynamic simulation provides the positions of agglomerated particles.

Findings
A simulation of magnetic park lock sensor shows a significant impact of ferromagnetic particles on sensor's accuracy. Moreover, gains on computational time because of model optimizations are reported.

Research limitations/implications
Only magnetic force and gravity are taken into account for particle dynamics. Mechanical forces such as friction and particle interactions might be considered in future works.

Practical implications
This paper provides the possibility to evaluate and improve magnetic sensor design with respect to particles contamination.

Originality/value
The paper presents a novel simulation tool developed to answer the growing need for reliable and fast prediction of magnetic position sensors’ degradation in the presence of metallic particles.
Challenges to providing culturally sensitive drug interventions for black and Asian minority ethnic (BAME) groups within UK youth justice systems
Authors: Gleeson Helen , Duke Karen , Thom Betsy 
Published: August 2019

Purpose
The purpose of this paper is to explore how substance use practitioners intervene with ethnically and culturally diverse groups of young people in contact with the youth justice system.

Design/methodology/approach
Telephone, face-to-face interviews and a focus group were conducted. Data were analysed thematically using a frame-reflective theoretical approach.

Findings
Practitioners tended to offer individualised interventions to young people in place of culturally specific approaches partly due to a lack of knowledge, training or understanding of diverse cultural needs, and for practical and resource reasons.

Research limitations/implications
Practitioners reject the official narrative of BAME youth in the justice system as dangerous and in need of control, viewing them instead as vulnerable and in need of support, but report they lack experience, and sufficient resources, in delivering interventions to diverse groups.

Originality/value
There is little information regarding how practitioners respond to diversity in their daily practice. This paper is an exploration of how diversity is framed and responded to in the context of youth substance use and criminal justice.
Galerkin proper orthogonal decomposition-reduced order method (POD-ROM) for solving generalized Swift-Hohenberg equation
Authors: Dehghan Mehdi , Abbaszadeh Mostafa , Khodadadian Amirreza , Heitzinger Clemens 
Published: August 2019

PurposeThe current paper aims to develop a reduced order discontinuous Galerkin method for solving the generalized Swift–Hohenberg equation with application in biological science and mechanical engineering. The generalized Swift–Hohenberg equation is a fourth-order PDE; thus, this paper uses the local discontinuous Galerkin (LDG) method for it.Design/methodology/approachAt first, the spatial direction has been discretized by the LDG technique, as this process results in a nonlinear system of equations based on the time variable. Thus, to achieve more accurate outcomes, this paper uses an exponential time differencing scheme for solving the obtained system of ordinary differential equations. Finally, to decrease the used CPU time, this study combines the proper orthogonal decomposition approach with the LDG method and obtains a reduced order LDG method. The circular and rectangular computational domains have been selected to solve the generalized Swift–Hohenberg equation. Furthermore, the energy stability for the semi-discrete LDG scheme has been discussed.FindingsThe results show that the new numerical procedure has not only suitable and acceptable accuracy but also less computational cost compared to the local DG without the proper orthogonal decomposition (POD) approach.Originality/valueThe local DG technique is an efficient numerical procedure for solving models in the fluid flow. The current paper combines the POD approach and the local LDG technique to solve the generalized Swift–Hohenberg equation with application in the fluid mechanics. In the new technique, the computational cost and the used CPU time of the local DG have been reduced.
Cooling of an isothermal surface having a cavity component by using CuO-water nano-jet
Authors: Selimefendigil Fatih , Chamkha Ali J. 
Published: August 2019

Purpose
The purpose of this study is to numerically analyze the convective heat transfer features for cooling of an isothermal surface with a cavity-like portion by using CuO-water nano jet. Jet impingement cooling of curved surfaces plays an important role in practical applications. As compared to flat surfaces, fluid flow and convective heat transfer features with jet impingement cooling of a curved surface becomes more complex with additional formation of the vortices and their interaction in the jet wall region. As flow separation and reattachment may appear in a wide range of thermal engineering applications such as electronic cooling, combustors and solar power, jet impingement cooling of a surface which has a geometry with potential separation regions is important from the practical point of view.

Design/methodology/approach
Numerical simulations were performed with a finite volume-based solver. The study was performed for various values of the Reynolds number (between 100 and 400), length of the cavity (between 5 w and 40 w), height of the cavity (between w and 5w) and solid nano-particle volume fraction (between 0 and 4 per cent). Artificial neural network modeling was used to obtain a correlation for the average Nusselt number, which can be used to obtain fast and accurate predictions.

Findings
It was observed that cavity geometrical parameters of the cooling surface can be adjusted to change the flow field and convective heat transfer features. When the cavity length is low, significant contribution of the inclined wall of the cavity on the average Nusselt number is achieved. As the cavity length and height increase, the average Nusselt number, respectively, reduce and slightly enhance. At the highest value of cavity height, significant changes in the convective flow features are obtained. By using nanofluids instead of water, enhancement of average heat transfer in the range of 35-46 per cent is obtained at the highest particle volume fraction.

Originality/value
In this study, jet impingement cooling of an isothermal surface which has a cavity-like portion was considered with nanofluids. Addition of this portion to the impingement surface has the potential to produce additional vortices which affects the fluid flow and convective features in the jet impingement heat transfer. This geometry has the forward-facing step for the wall jet region with flow separation reattachment in the region. Based on the above literature survey and to the best of the authors’ knowledge, jet impingement cooling for such a geometry has never been reported in the literature despite its importance in practical thermal engineering applications. The results of this study may be useful for design and optimization of such systems and to obtain best performance in terms of fluid flow and heat transfer characteristics.
Sustainable supply chain performance, its practice and impact on barriers to collaboration
Authors: Kumar Gopal , Goswami Mohit 
Published: August 2019

Purpose
Sustainable supply chain (SSC) provides one opportunity to achieve competitive advantage. To achieve SSC through triple bottom line (TBL) – economic, environment and social – is extensively discussed. Most literature in dealing with environmental issues undermine social dimension even though its potential to bring outstanding results by earning customers loyalty and commitment is immense. Local orientation and different context motivate firms to prioritize sustainability dimensions differently. The purpose of this paper is to conceptualize SSC performance as three dimensional second-order formative construct which is caused by three first-order reflective constructs. Further, the authors examined effect of sustainable performance on barriers to sustainability through collaboration.

Design/methodology/approach
The model is validated by data collected from industries in India using both partial least squares and covariance based structural equation modeling. The authors find the model is valid for both manufacturing and service sectors.

Findings
In Indian context, social dimension is most and environmental dimension is least important differentiating it from developed economy. The authors find sustainable performance subsequently mitigates barriers and risks to sustainability, thereby reducing its impact over time.

Originality/value
This study conceptualizes SSC performance as three dimensional second-order formative construct which is caused by three first-order reflective constructs. Given criticisms to TBL for being western-centric, this study unearths insightful phenomena having implications for both developing and developed world. Further, the authors find sustainable performance reduces effects of barriers to collaboration necessary to achieve SSC. This study contributes to both theory and practice by modeling sustainability performance.
International honey laundering and consumer willingness to pay a premium for local honey: an experimental study
Authors: Jones Ritten Chian , Thunström Linda , Ehmke Mariah , Beiermann Jenny , McLeod Donald 
Published: August 2019

Fraudulent activities in the international honey market affect 10% of food, and cost the global food market $50 billion per annum. Although many developed countries have created regulations to combat food fraud, illegally imported honey, especially originating from China, still enters through transshipments and relabelling to mask its true origin. This honey laundering poses a health risk to consumers, as Chinese honey potentially contains illegal and unsafe antibiotics and high levels of herbicides and pesticides. We analyse whether information about the negative health impacts of laundered honey increases the proportion of consumers willing to pay a premium for local fraud‐free honey. Using a laboratory experiment, we find when consumers are given honey laundering information, their willingness to pay a premium for local fraud‐free honey increases by as much as 27 percentage points. Our findings suggest that by conveying honey laundering information and guaranteeing their honey is fraud‐free, producers can potentially increase revenues and reduce the prevalence of food fraud. Our results further show that consumers' preference for various honey characteristics and age also influence the probability of paying a premium for local honey.
Rethinking Human Rights in York as a Human Rights City
Authors: Gready Paul , Lockey Liz 
Published: August 2019

AbstractHuman rights is in crisis in the UK. It lacks significant political backing and public support. This ‘insider account’ of York becoming a human rights city suggests that there is a need to rethink approaches to human rights. The article looks at the strategies adopted in the city; the annual city‐based indicator report which provides the key reference point for all local activities; and the declaration of York as a ‘human rights city’ in 2017 alongside its subsequent impact. The discussion is linked to two debates within human rights: how to define and build a culture of human rights, and what it means for human rights to be truly relevant at a local level. The new approach advocated can be summarised as participatory, locally informed, and related to everyday concerns.
‘Keeping It Real’: women's Enactments of Lay Health Knowledges and Expertise on Facebook
Authors: Maslen Sarah , Lupton Deborah 
Published: August 2019

AbstractThis article presents findings from a qualitative study concerning Australian women's use of Facebook for health and medical information and support and the implications for understanding modes of lay knowledge and expertise. Thinking with feminist new materialism theory, we identify the relational connections, affective forces and agential capacities described by participants as technological affordances came together with human bodily affordances. Affective forces were a dominant feature in users’ accounts. Women were able to make relational connections with peers based on how valid or relevant they found other group members’ expertise and experiences, how supportive other members were, how strong they wanted their personal connection to be and how much privacy they wanted to preserve. We identified three modes of engagement: 1) expertise claims based on appropriation and distribution of biomedical knowledge and experience; 2) sharing experiential knowledge without claiming expertise and 3) evaluation and use of knowledge presented by others principally through observing. We conclude that an ‘expert patient’ is someone who is familiar with the rules of engagement on sites such as Facebook and is able to negotiate and understand the affects and levels of disclosure and intimacy that such engagement demands.
Technology for Triple Fortification of Salt with Folic Acid, Iron, and Iodine
Authors: Modupe Oluwasegun , Krishnaswamy Kiruba , Diosady Levente L. 
Published: August 2019

AbstractAs many of the maternal and child health complications result from folic acid, iron, and iodine deficiencies; it makes sense to combat these simultaneously. We have developed cost‐effective technology to deliver these three micronutrients simultaneously through salt. Our goal was to retain at least 70% of the micronutrients during 6 months of storage. The fortified salt was formulated by spraying a solution that contained 2% iodine and 0.5% or 1% folic acid onto salt and adding encapsulated ferrous fumarate. The formulated triple fortified salt contained 1,000 ppm iron, 50 ppm iodine, and 12.5 or 25 ppm folic acid. The spray solution and the salt were stored for 2 and 6 months respectively at 25, 35, and 45 °C 60 to 70% relative humidity. Even at 45 °C, over 70% of both iodine and folic acid were retained in the salt. The best formulation based on the color of the salt and stability of iodine and folic acid contained 12.5 ppm folic acid, 50 ppm iodine, and 1,000 ppm iron. These results indicate that iron, iodine, and folic acid can be simultaneously delivered to a vulnerable population through salt using the technology described. Also, the quality control of the process can be developed around pteroic acid that was detected as a primary degradation product of folic acid.Practical ApplicationThe technology developed is already transferred to India for industrial scale up. When fully operational, the technology will simultaneously solve iron, iodine, and folic acid deficiencies in vulnerable populations at a very low cost.
Ultrasound‐mediated therapies for the treatment of biofilms in chronic wounds: a review of present knowledge
Authors: LuTheryn Gareth , Glynne‐Jones Peter , Webb Jeremy S , Carugo Dario 
Published: August 2019

SummaryBacterial biofilms are an ever‐growing concern for public health, featuring both inherited genetic resistance and a conferred innate tolerance to traditional antibiotic therapies. Consequently, there is a growing interest in novel methods of drug delivery, in order to increase the efficacy of antimicrobial agents. One such method is the use of acoustically activated microbubbles, which undergo volumetric oscillations and collapse upon exposure to an ultrasound field. This facilitates physical perturbation of the biofilm and provides the means to control drug delivery both temporally and spatially. In line with current literature in this area, this review offers a rounded argument for why ultrasound‐responsive agents could be an integral part of advancing wound care. To achieve this, we will outline the development and clinical significance of biofilms in the context of chronic infections. We will then discuss current practices used in combating biofilms in chronic wounds and then critically evaluate the use of acoustically activated gas microbubbles as an emerging treatment modality. Moreover, we will introduce the novel concept of microbubbles carrying biologically active gases that may facilitate biofilm dispersal.
Altitude and fungal diversity influence the structure of Antarctic cryptoendolithic Bacteria communities
Authors: Coleine Claudia , Stajich Jason E. , Pombubpa Nuttapon , Zucconi Laura , Onofri Silvano , Canini Fabiana , Selbmann Laura 
Published: August 2019

SummaryEndolithic growth within rocks is a critical adaptation of microbes living in harsh environments where exposure to extreme temperature, radiation, and desiccation limits the predominant life forms, such as in the ice‐free regions of Continental Antarctica. The microbial diversity of the endolithic communities in these areas has been sparsely examined. In this work, diversity and composition of bacterial assemblages in the cryptoendolithic lichen‐dominated communities of Victoria Land (Continental Antarctica) were explored using a high‐throughput metabarcoding approach, targeting the V4 region of 16S rDNA. Rocks were collected in 12 different localities (from 14 different sites), along a gradient ranging from 1000 to 3300 m a.s.l. and at a sea distance ranging from 29 to 96 km. The results indicate Actinobacteria and Proteobacteria are the dominant taxa in all samples and defined a ‘core’ group of bacterial taxa across all sites. The structure of bacteria communities is correlated with the fungal counterpart and among the environmental parameters considered, altitude was found to influence bacterial biodiversity, while distance from sea had no evident influence.