bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hall effects on radiated magneto-power-law fluid flow over a stretching surface with power-law velocity slip effect
Authors: Ali Asgar , Jana R.N. , Das S. 
Published: June 2020

PurposeThis paper aims to assess the effectiveness of Hall currents and power-law slip condition on the hydromagnetic convective flow of an electrically conducting power-law fluid over an exponentially stretching sheet under the effect of a strong variable magnetic field and thermal radiation. Flow formation is developed using the rheological expression of a power-law fluid.Design/methodology/approachThe nonlinear partial differential equations describing the flow are transformed into the nonlinear ordinary differential equations by employing the local similarity transformations and then solved numerically by an effective numerical approach, namely, fourth-order Runge–Kutta integration scheme, along with the shooting iteration technique. The numerical solution is computed for different parameters by using the computational software MATLAB bvp4c. The bvp4c function uses the finite difference code as the default. This method is a fourth-order collocation method. The impacts of thermophysical parameters on velocity and temperature distributions, skin friction coefficients and Nusselt number in the boundary layer regime are exhibited through graphs and tables and deliberated with proper physical justification.FindingsOur investigation conveys that Hall current has an enhancing behavior on velocity profiles and reduces skin friction coefficients. An increase in the power-law index is observed to deplete velocity and temperature evolution. The temperature for the pseudo-plastic (shear-thinning) fluid is relatively higher than the corresponding temperature of the dilatant (shear-thickening) fluid. The streamlines are more distorted and have low intensity near the surface of the sheet for the dilatant fluid than the pseudo-plastic fluid.Social implicationsThe study is pertinent to the expulsion of polymer sheet and photographic films, hydrometallurgical industry, electrically conducting polymer dynamics, magnetic material processing, solutions and melts of polymer processing, purification of molten metals from nonmetallic. The results obtained in this work can be relevant in fluid mechanics and heat transfer applications.Originality/valueThe present problem has, to the authors' knowledge, not communicated thus far in the scientific literature. A comparative study with the published works is conducted to verify the accuracy of the present study. The results obtained in this analysis are significant in providing the standards for validating the accuracies of some numerical or empirical methods.
Research on the effects of L-carnitine and trans-chalcone on endoplasmic reticulum stress and oxidative stress in high-fructose corn syrup-fed rats
Authors: Unsal Velid , Deveci Köksal , Ozmen Zeliha Cansel , Tumer Mehmet Kemal 
Published: June 2020

PurposeThe debate on the metabolic effects of high fructose corn syrup (HFCS) continues. The deterioration of endoplasmic reticulum (ER) homeostasis is called ER stress. Glucose-regulated protein-78 (GRP-78) and X-box binding protein-1 (XBP-1) are key markers of ER stress and the therapeutic targets of diseases. Sterol regulatory element binding protein-1c (SREBP-1c) is the most important transcription factor that regulates the expression of enzymes for fatty acid synthesis. The purpose of this paper is to research the effects of L-carnitine and trans-chalcone on ER stress and oxidative stress parameters, and to explore the therapeutic potential of L-carnitine and trans-chalcone molecules.Design/methodology/approachForty male wistar albino rats randomly selected were divided into five groups. All groups are fed with standard chow (ad libitum). While Group I was fed with drinking water, Group II, III, IV and V were fed with water containing 15% HFCS. L-carnitine was given to Group IV and trans-chalcone to Group V, and both were dissolved with DMSO and given intraperitoneally. Group III was not given anything additional.FindingsWhile the amount of water consumption of HFCS-fed rats has increased, the amount of feed consumption has decreased. The weights of rats in Group II and Group III have increased significantly compared to Group I (p= 0.001,p= 0.001 respectively). In Group III, GRP78, XBP-1; malondialdehyde level (p< 0.001,p= 0.001,p= 0.041); total cholesterol, triglyceride, LDL levels (p= 0.001,p< 0.001,p= 0.009,p= 0.001, respectively) have increased significantly.Originality/valueTo the best of the authors’ knowledge, this study is the first report to show that excessive HFCS consumption causes oxidative stress and ER stress. The antioxidant and antiobesity properties of trans chalcone have been demonstrated. Extensive experimental and clinical studies should be conducted.
Thin-film based sensor for the selective detection of mercury (Hg2+) ions at the picomolar range
Authors: Rotake Dinesh Ramkrushna , Darji Anand , Singh Jitendra 
Published: June 2020

PurposeThe purpose of this paper is a new thin-film based sensor proposed for sensitive and selective detection of mercury (Hg2+) ions in water. The thin-film platform is easy to use and quick for heavy metal ions (HMIs) detection in the picomolar range. Ion-selective self-assembled monolayer's (SAM) of thiol used for the detection of HMIs above the Au/Ti top surface.Design/methodology/approachA thin-film based platform is suitable for the on-field experiments and testing of water samples. HMIs (antigen) and thiol-based SAM (antibody) interaction results change in surface morphology and topography. In this study, the authors have used different characterization techniques to check the selectivity of the proposed method. This change in the morphology and topography of thin-film sensor checked with Fourier-transform infrared spectroscopy, surface-enhanced Raman scattering spectroscopy, atomic force microscopy and scanning electron microscopy with energy dispersive x-ray analysis used for high-resolution images.FindingsThis thin-film based platform is straightforward to use and suitable for real-time detection of HMIs at the picomolar range. This thin-film based sensor platform capable of achieving a lower limit of detection (LOD) 27.42 ng/mL (136.56 pM) using SAM of Homocysteine-Pyridinedicarboxylic acid to detect Hg2+ions.Research limitations/implicationsA thin-film based technology is perfect for real-time testing and removal of HMIs, but the LOD is higher as compared to microcantilever-based devices.Originality/valueThe excessive use and commercialization of nanoparticle (NPs) are quickly expanding their toxic impact on health and the environment. The proposed method used the combination of thin-film and NPs, to overcome the limitation of NPs-based technique and have picomolar (136.56 pM) range of HMIs detection. The proposed thin-film-based sensor shows excellent repeatability and the method is highly reliable for toxic Hg2+ions detection. The main advantage of the proposed thin-film sensor is its ability to selectively remove the Hg2+ions from water samples just like a filter and a sensor for detection at picomolar range makes this method best among the other current-state of the art techniques.
Adopting a digital transformation strategy to enhance business network commons regeneration: an explorative case study
Authors: Zoppelletto Alessia , Bullini Orlandi Ludovico , Rossignoli Cecilia 
Published: June 2020

PurposeThis article aims to understand whether and how a digital transformation strategy (DTS) can strengthen the relationship between network organizations and the generation/regeneration of their business network commons (BNC). Further, it investigates the role of the DTS in managing the BNC, a critical source of business network success.Design/methodology/approachA two-year longitudinal case study of an Italian business network operating in the wine sector was conducted.FindingsThis study provides theoretical insights into the digital, sustainable shift of a business network. On combining a network's business strategy and its DTS, digital resources are a key driver to promote BNC regeneration. A DTS undertaken to manage, regenerate and preserve the BNC can positively affect organizational variables, such as participatory architecture, and the network-level organizational integration and can help in preventing opportunistic behaviors affecting the BNC. Moreover, the DTS supports quality and social responsibility.Research limitations/implicationsThis study focuses on an Italian case and its findings are hence not generalizable. It would be interesting to study sustainable business networks' digital shift in different socioeconomic contexts as well as in different industry settings.Practical implicationsNetwork SMEs and other stakeholders (institutions, competitors and consumers) can foster the transition from a “business-as-usual” strategy to a long-term strategy for digitalized management of common resources.Originality/valueThe study is at the intersection of, and contributes to, several research streams. It contributes to the digital transformation literature by adding information on the positive externalities of digitalization in the social and economic environment. It also contributes to the early streams of organizational and managerial literature on the BNC.
Design of symmetrical half-bridge converter with a series coupling capacitor
Authors: Rashmi Ruchi , Jagtap Shweta 
Published: June 2020

Purpose
With the advancement of technology, size, cost, and losses of the switched mode power supply (SMPS) have been decreasing. However, due to the high frequency switching, design of magnetic drives and isolation circuits are becoming a crucial factor in SMPS. This paper presents design criteria, procedure and implementation of AC-DC half bridge (HB) converter with lower cost, smaller size and lower voltage stress on the power switch.

Design/Methodology/approach
The HB converter is designed in a symmetrical mode with a series coupling capacitor. Isolated power supplies are used for the converter and control circuit. Further, a transformer based isolated gate driver is used to drive both MOSFETs. The control IC works in voltage control mode to regulate voltage by controlling the duty cycle of the MOSFETs.

Findings
Control characteristics and performance of the HB converter is simulated using the MATLAB software and prototype of 170 W HB converter is built to validate the analytical results under variable load current and source voltage. The power quality and variation of load voltage at 2 A, 5 A, 7 A are reported.

Originality/value
This paper presents the design of a low-cost HB converter in a symmetrical mode which saves the additional cost of symmetric correction circuit normally required in asymmetrical mode design. This paper also focuses on the selection of primary and secondary side switch, series coupling capacitor, commuting diode, isolated drive and charge equalizer resistor.
Lithology‐dependent seismic anisotropic amplitude variation with offset correction in transversely isotropic media
Authors: Babasafari Amir Abbas , Ghosh Deva Prasad , Ahmed Salim Ahmed Mohammed , Kordi Masoumeh 
Published: June 2020

ABSTRACTAnalysis of amplitude variation with offset is an essential step for reservoir characterization. For an accurate reservoir characterization, the amplitude obtained with an isotropic assumption of the reservoir must be corrected for the anisotropic effects. The objective is seismic anisotropic amplitude correction in an effective medium, and, to this end, values and signs of anisotropic parameter differences (Δδ and Δε) across the reflection interfaces are needed. These parameters can be identified by seismic and well log data. A new technique for anisotropic amplitude correction was developed to modify amplitude changes in seismic data in transversely isotropic media with a vertical axis of symmetry. The results show that characteristics of pre‐stack seismic data, that is, amplitude variation with offset gradient, can be potentially related to the sign of anisotropic parameter differences (Δδ and Δε) between two layers of the reflection boundary. The proposed methodology is designed to attain a proper fit between modelled and observed amplitude variation with offset responses, after anisotropic correction, for all possible lithofacies at the reservoir boundary. We first estimate anisotropic parameters, that is, δ and ε, away from the wells through Backus averaging of elastic properties resulted from the first pass of isotropic pre‐stack seismic inversion, on input data with no amplitude correction. Next, we estimate the anisotropic parameter differences at reflection interfaces (values and signs of Δδ and Δε). We then generate seismic angle gather data after anisotropic amplitude correction using Rüger's equation for the P‐P reflection coefficient. The second pass of isotropic pre‐stack seismic inversion is then performed on the amplitude‐corrected data, and elastic properties are estimated. Final outcome demonstrates how introduced methodology helps to reduce the uncertainty of elastic property prediction. Pre‐stack seismic inversion on amplitude‐corrected seismic data results in more accurate elastic property prediction than what can be obtained from non‐corrected data. Moreover, a new anisotropy attribute (ν) is presented for improvement of lithology identification.
Integrating the Bright and Dark Sides of Corporate Volunteering Climate: Is Corporate Volunteering Climate a Burden or Boost to Employees?
Authors: Zhang Zhe , Wang Juan , Jia Ming 
Published: June 2020

AbstractConventional wisdom is that a corporate volunteering climate should be beneficial to employees. We challenge this perspective by integrating person–environment fit and conservation of resources theories and providing an integrative model that examines how and when corporate volunteering climate produces positive and negative consequences for employees. Using a two‐wave time‐lagged study of 283 employees in 42 companies, our multilevel model shows that positive emotions mediate the relationship between corporate volunteering climate and work engagement, and perceived role overload mediates the relationship between corporate volunteering climate and work–family conflict. Employees’ communal orientation moderates the positive relationship between corporate volunteering climate and positive emotions, whereas competitive orientation moderates the positive relationship between corporate volunteering climate and perceived role overload. Communal orientation moderates the indirect effect between corporate volunteering climate and work engagement via positive emotions, but competitive orientation moderates the indirect effect between corporate volunteering climate and work–family conflict via perceived role overload. Our study provides balanced insights to help understand the benefits and costs of corporate volunteering climate in work and non‐work domains.
Trade development between China and countries along the Belt and Road: A spatial econometric analysis based on trade competitiveness and complementarity
Authors: Chen Jiyong , Chen Dabo , Yao Aiping 
Published: June 2020

AbstractThis paper empirically analyses the effect of trade competitiveness and complementarity on the trade development between China and the countries along the Belt and Road (B&R). The study first measures the trade competitiveness and the complementarity between China and the countries along the B&R by using the trade competitiveness coefficient (TCC) and the trade complementarity index (TCI). Then a spatial gravity model is constructed to analyse the effect of trade competitiveness and complementarity on trade development between China and the countries along the B&R. We use generalized method of moments (GMM) and spatial filtering technology to verify the robustness of the model. The results show that the GDP of China and the countries along the B&R, the land area of countries along the B&R, trade complementarity, common language, free trade agreements (FTA), and the B&R Initiative significantly promote the trade development between China and the countries along the B&R, whereas the geographical distance between countries and trade competitiveness significantly inhibit it. Finally, to promote the trade development between China and the countries along the B&R, the present paper puts forward suggestions including improving trade promotion policies between China and the countries along the B&R and vigorously expanding cooperation with complementary industries in the countries along the B&R to enhance trade dependence.
AIEgens: An emerging fluorescent sensing tool to aid food safety and quality control
Authors: Huang Xiaolin , Guo Qian , Zhang Ruoyao , Zhao Zheng , Leng Yuankui , Lam Jacky W. Y. , Xiong Yonghua , Tang Ben Zhong 
Published: June 2020

AbstractAs a global public health problem, food safety has attracted increasing concern. To minimize the risk exposure of food to harmful ingredients, food quality and safety inspection that covers the whole process of “from farm to fork” is much desired. Fluorescent sensing is a promising and powerful screening tool for sensing hazardous substances in food and thus plays a crucial role in promoting food safety assurance. However, traditional fluorphores generally suffer the problem of aggregation‐caused quenching (ACQ) effect, which limit their application in food quality and safety inspection. In this regard, luminogens with aggregation‐induced emission property (AIEgens) showed large potential in food analysis since AIEgens effectively surmount the ACQ effect with much better detection sensitivity, accuracy, and robustness. In this contribution, we review the latest developments of food safety monitoring by AIEgens, which will focus on the molecular design of AIEgens and their sensing principles. Several examples of AIE‐based sensing applications for screening food contaminations are highlighted, and future perspectives and challenges in this emerging field are tentatively elaborated. We hope this review can motivate new research ideas and interest to aid food safety and quality control, and facilitate more collaborative endeavors to advance the state‐of‐the‐art sensing developments and reduce actual translational gap between laboratory research and industrial production.
Post‐Brexit Policies for a Resilient Arable Farming Sector in England
Authors: Vigani Mauro , Urquhart Julie , Black Jasmine Elizabeth , Berry Robert , Dwyer Janet , Rose David Christian 
Published: June 2020

SummaryWith the withdrawal of the UK from the European Union and increasing pressures from climate change, English arable farming resilience is in a fragile position. Most Brexit impact assessments have focused on quantitative analysis, however here we take a qualitative approach to assess how future trade agreements could impact the resilience of the UK arable farming system. We discuss the main strategies that are currently taken by English arable farmers to improve resilience using evidence from a large‐scale survey in the East of England. Using information from a multi‐stakeholder workshop, we look at arable farming resilience in three forms characteristic of the farming system; namely, robustness, adaptability and transformability and how these relate to and are potentially influenced by three different Brexit trade scenarios. Stakeholders’ recommendations suggest that a ‘hard’ no‐deal scenario will require policies for social protection of farmers in more vulnerable rural areas, while in a ‘softer’ scenario a ‘public money for public goods’ policy could be implemented effectively by learning from previous environmental schemes. Nevertheless, resilience can be enhanced only by addressing structural and policy issues, such as generational renewal, advice and extension, tenancy duration limits and smarter PPP regulations, regardless of what post‐Brexit deal with the EU finally emerges.
Human sperm vitrification: A scientific report
Authors: Schulz Mabel , Risopatrón Jennie , Uribe Pamela , Isachenko Evgenia , Isachenko Vladimir , Sánchez Raúl 
Published: June 2020

AbstractBackgroundThe sperm vitrification developed by this group is based on the ultrarapid freezing of a vitrification solution composed of a non‐permeable cryoprotectant (saccharides and protein), in which previously selected spermatozoa are resuspended, free of seminal plasma, and then plunged directly into liquid nitrogen. Compared to traditional sperm freezing, vitrification does not cause chemical or physical damage to the intracellular structures and reduces the damage to the plasma membrane because no ice crystals form, thus preserving motility and DNA integrity.ObjectivesThis manuscript is a review of the vitrification methodology developed by the authors’ research group, including studies showing the application in human reproduction therapy.Materials and methodsThe authors perform a review of the work initiated more than a decade ago by this research group, on the implementation of sperm vitrification, a more effective technique for cryopreservation of human spermatozoa, discussing the results obtained by other authors and the projection of this technique.Results and discussionThe vitrification technique has been developed in selected spermatozoa free of seminal plasma supplemented with saccharides such as sucrose, trehalose, and dextran, together with albumin, providing a high motility rate and protective structures of the cytoskeleton. In patients, it can be used to preserve their fertility for oncological reasons, genetics, inflammatory diseases, or reproductive medicine techniques. The possibility that vitrified spermatozoa can be preserved at temperatures of −80°C can simplify sample storage, optimizing the space and time as well as operator safety.ConclusionVitrification techniques have demonstrated the preservation of selected spermatozoa without seminal plasma and with non‐permeable cryoprotectants and protein. Currently, it is one of the most effective ways to maintain sperm function and has been used in in vitro fertilization or intrauterine insemination in humans, achieving healthy live births.