bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tuning of evolutionary particle filtering approach for estimation of trajectory deviation
Authors: Mukherjee Abhik , Chattaraj Suvendu , Chakraborty Sudipta 
Published: January 2019

AbstractAn autonomous vehicle launched from moving platform is subjected to flexure‐like disturbance and needs to stabilize itself before embarking on the target tracking phase. Control and guidance remains inactive during stabilization phase. Hence, estimating the deviation from the intended trajectory is important in the absence of control and guidance commands for trajectory correction. This estimation problem is here mapped to the misalignment estimation problem, with the intended trajectory data resembling mother data and the followed trajectory data resembling daughter data. The main requirement is fast convergence for early commencement of target tracking phase. Kalman filter and its variants fail to converge due to the inability to model time varying nonlinearities and flexure in the system model. Conventional particle filter converges, but computation time is high. This work explores evolutionary particle filter variants that may provide faster convergence through adaptive tuning of the range from where particle support points are selected. Such heuristics is based on the observed residual trend. Monte Carlo simulation results underline the importance of designing estimator based on adaptive tuned evolutionary particle filter algorithm.
Ti (IV) attached‐phosphonic acid functionalized capillary monolith as a stationary phase for in‐syringe‐type fast and robust enrichment of phosphopeptides
Authors: Salimi Kouroush , Kip Çiğdem , Çelikbıçak Ömür , Usta Duygu Deniz , Pınar Aslı , Salih Bekir , Tuncel Ali 
Published: January 2019

AbstractIn this study, poly(vinylphosphonic acid‐co‐ethylene dimethacrylate), poly(VPA‐co‐EDMA) capillary monolith was synthesized as a starting material for obtaining a stationary phase for microscale enrichment of phosphopeptides. The chelation of active phosphonate groups with Ti (IV) ions gave a macroporous monolithic column with a mean pore size of 5.4 μm. The phosphopeptides from different sources were enriched on Ti (IV)‐attached poly(VPA‐co‐EDMA) monolith using a syringe‐pump. The monolithic capillary columns exhibited highly sensitive/selective enrichment performance with phosphoprotein concentrations as low as 1.0 fmol/mL. Six different phosphopeptides were detected with high intensity by the treatment of β‐casein digest with the concentration of 1.0 fmol/mL, using Ti (IV)@poly(VPA‐co‐EDMA) monolith. Highly selective enrichment of phosphopeptides was also successfully carried out even at trace amounts, in a complex mixture of digested proteins (molar ratio of β‐casein to bovine serum albumin, 1:1500) and three phosphopeptides were successfully detected. Four highly intense signals of phosphopeptides in human serum were also observed with high signal‐to‐noise ratio and a clear background after enrichment with Ti (IV)@poly(VPA‐co‐EDMA) monolith. It was concluded that the capillary microextraction system enabled fast, efficient and robust enrichment of phosphopeptides from microscale complex samples. The whole enrichment process was completed within 20 min, which was shorter than in the previously reported studies.
Separation of Trimethyl Borate from a Liquid Mixture by Pervaporation
Authors: Gaálová Jana , Vojtek Lukáš , Lasnier Sara , Tadic Toma , Sýkora Jan , Izák Pavel 
Published: January 2019

AbstractFour commercial polyvinyl alcohol (PVA) and polydimethylsiloxane (PDMS) membranes were applied to the pervaporation of an azeotropic mixture containing trimethyl borate, a precursor to boronic acids used in Suzuki couplings and a gaseous anti‐oxidant in solder flux or brazing. The degree of cross‐linking of the chains in the active layer played a crucial role in the membrane process using the membranes PERVAP 4155‐80, PERVAP 4155‐40 and PERVAP 4155‐30. PERVAP 4155‐30 reached the best results from all tested membranes; an impressive selectivity with fast permeation was also achieved with the PERVAP 4060 membrane. Methanol preferentially passed through PERVAP 4155‐30, but trimethyl borate was favorably pervaporated from the mixture by PERVAP 6040, due to the diverse affinities of the membranes.
Fatty Acid Deoxygenation in Supercritical Hexane over Catalysts Synthesized Hydrothermally for Biodiesel Production
Authors: Stepacheva Antonina A. , Sidorov Alexander I. , Matveeva Valentina G. , Sulman Mikhail G. , Sulman Esther M. 
Published: January 2019

AbstractDeposition of catalytically active metal‐containing compounds on solid porous supports by using superheated (subcritical) water is a promising way to produce materials with unique physicochemical and catalytic properties. The hydrothermal method has been found to give catalysts with high surface area, fine distribution of the active phase, and high catalytic activity. In the current work, the catalytic activities of 10 % Ni and 10 % Co deposited on hyper‐cross‐linked polystyrene (HPS) by the hydrothermal method in the supercritical deoxygenation of fatty acids were compared. 10 % Ni/HPS was found to be the most active catalyst in the deoxygenation of stearic acid in supercritical n‐hexane.
Practical Application of the Probabilistic‐Statistical Model of the Suspension Separation in Hydrocyclones
Authors: Krokhina Alina V. , Lvov Vladimir A. , Fatova Alvina V. 
Published: January 2019

AbstractAn effective practical approach that allows not only a significant reduction in the scope of practical experiments in the course of studying suspension separation processes in hydrocyclones, but also makes it possible to assess the intensity of random components of the processes and define the interrelation between such components and hydrodynamics of flows in a hydrocyclone is presented. Within the frames of the developed probabilistic‐statistical model of suspension separation in hydrocyclones on the basis of statistical self‐similarity properties, a relationship was found between determined and random components of the processes. This allowed transitioning from three‐parameter probability density functions for suspension particles in hydrocyclones to two‐parameter functions; thus significantly improving the efficiency of practical application of the developed model.
Recent Progress in Decoupled H2 and O2 Production from Electrolytic Water Splitting
Authors: Liu Xuan , Chi Jingqi , Dong Bin , Sun Yujie 
Published: January 2019

AbstractConventional water splitting electrolyzers produce H2 and O2 simultaneously and, thus, result in the potential formation of a hazardous H2/O2 mixture and reactive oxygen species, posing safety risks and substantially increasing the manufacturing cost of electrolyzers. The use of redox mediators successfully decouples water splitting to generate H2 and O2 at different times and in different places. Such a nonconventional water splitting strategy enables the possibility of producing highly pure gas products. In some cases, the costly membrane could also be avoided. Even though it is a relatively new field, many promising electrocatalytic and photocatalytic systems have been reported over the last few years for decoupled water splitting. This Minireview briefly introduces the design principle and highlights several representative redox mediators of decoupled water‐splitting electrolysis. It is anticipated that new competent and low‐cost redox mediators will be developed not only for water electrolysis, but also many other renewable energy‐driven applications.
A Green Approach: Vicinal Oxidative Electrochemical Alkene Difunctionalization
Authors: Martins Guilherme M. , Shirinfar Bahareh , Hardwick Tomas , Ahmed Nisar 
Published: January 2019

AbstractInvited for this month's cover picture is the group of Dr. Nisar Ahmed (Cardiff University, United Kingdom). The cover picture shows that vicinal oxidative electrochemical alkene functionalization is a powerful and sustainable approach that can readily build complex organic molecules without the use of external chemical oxidants and catalysts, proceed with excellent atom economies. Read the full text of the Minireview at 10.1002/celc.201801466.
Analysis of distributed database access path prediction based on recurrent neural network in internet of things
Authors: Yu Guangzhou , Fu Weina 
Published: January 2019

SummaryFor avoiding the phenomenon of congestion, delay, and jitter in thedatabase access path, it is necessary to study the prediction method of database access path. Predicted database access path has high delay and jitter when using existing database access path prediction method to predict the path. Therefore, a prediction method of database access path is proposed based on the recurrent neural network. A decision matrix is constructed and normalized based on the analytic hierarchy process. The evaluation value of the alternative transit data center is calculated by the arithmetic weighted average operator, and the transit data center is selected according to the evaluation result. The matter‐element analysis model is used to establish the mapping relationship between the user experience quality and the network service quality parameters. Moreover, the user experience quality evaluation level objective function of the database access path prediction method is constructed. Through the objective function to obtain the optimal database access path, the database access path prediction is completed. The experimental results show that the delay of the database access path predicted by the proposed method is much lower than other methods. The jitter is less than 30 ms and the jitter is small, which verifies the effectiveness of the path prediction method.
The impact of corporate social responsibility on customer loyalty in hypermarkets: A new socially responsible strategy
Authors: Cuesta‐Valiño Pedro , Rodríguez Pablo Gutiérrez , Núñez‐Barriopedro Estela 
Published: January 2019

AbstractThe purpose of this paper is to contribute to knowledge on the impact of corporate social responsibility (CSR) activities on retailers' performance (hypermarkets). An analysis using a comprehensive conceptualization of CSR reveals that CSR has positive implications for hypermarkets' performance and illustrates which CSR dimensions are the most important to focus on. For this purpose, this study enhances its empirical validity by collecting data from 667 respondents in Spain and testing the hypothesis applying partial least squares structural equation modeling. The study finds that CSR is positively influencing customer loyalty, and customer satisfaction, image, and quality also intervened in their relationships. In particular, a new finding of the study highlights the importance of the mediating role played by image and quality in enhancing the effect of CSR on satisfaction. The research findings provide useful insights into how hypermarkets should develop a CSR strategy that would enhance customer loyalty.
Fire legacies in eastern ponderosa pine forests
Authors: Roberts Caleb P. , Donovan Victoria M. , Wonkka Carissa L. , Powell Larkin A. , Allen Craig R. , Angeler David G. , Wedin David A. , Twidwell Dirac 
Published: January 2019

AbstractDisturbance legacies structure communities and ecological memory, but due to increasing changes in disturbance regimes, it is becoming more difficult to characterize disturbance legacies or determine how long they persist. We sought to quantify the characteristics and persistence of material legacies (e.g., biotic residuals of disturbance) that arise from variation in fire severity in an eastern ponderosa pine forest in North America. We compared forest stand structure and understory woody plant and bird community composition and species richness across unburned, low‐, moderate‐, and high‐severity burn patches in a 27‐year‐old mixed‐severity wildfire that had received minimal post‐fire management. We identified distinct tree densities (high: 14.3 ± 7.4 trees per ha, moderate: 22.3 ± 12.6, low: 135.3 ± 57.1, unburned: 907.9 ± 246.2) and coarse woody debris cover (high: 8.5 ± 1.6% cover per 30 m transect, moderate: 4.3 ± 0.7, low: 2.3 ± 0.6, unburned: 1.0 ± 0.4) among burn severities. Understory woody plant communities differed between high‐severity patches, moderate‐ and low‐severity patches, and unburned patches (allp < 0.05). Bird communities differed between high‐ and moderate‐severity patches, low‐severity patches, and unburned patches (allp < 0.05). Bird species richness varied across burn severities: low‐severity patches had the highest (5.29 ± 1.44) and high‐severity patches had the lowest (2.87 ± 0.72). Understory woody plant richness was highest in unburned (5.93 ± 1.10) and high‐severity (5.07 ± 1.17) patches, and it was lower in moderate‐ (3.43 ± 1.17) and low‐severity (3.43 ± 1.06) patches. We show material fire legacies persisted decades after the mixed‐severity wildfire in eastern ponderosa forest, fostering distinct structures, communities, and species in burned versus unburned patches and across fire severities. At a patch scale, eastern and western ponderosa system responses to mixed‐severity fires were consistent.
Immunobinding‐induced alteration in the electrophoretic mobility of proteins: An approach to studying the preconcentration of an acidic protein under cationic isotachophoresis
Authors: Guo Shuang , Jacroux Thomas , Ivory Cornelius F. , Li Lei , Dong Wen‐Ji 
Published: January 2019

AbstractThe objective of this study is to explore an approach for analyzing negatively charged proteins using paper‐based cationic ITP. The rationale of electrophoretic focusing the target protein with negative charges under unfavorable cationic ITP condition is to modify the electrophoretic mobility of the target protein through antigen‐antibody immunobinding. Cationic ITP was performed on a paper‐based analytical device that was fabricated using fiberglass paper. The paper matrix was modified with (3‐aminopropyl)trimethoxysilane to minimize sample attraction to the surface for cationic ITP. Negatively charged BSA was used as the model target protein for the cationic ITP experiments. No electrophoretic mobility was observed for BSA‐only samples during cationic ITP experimental condition. However, the presence of a primary antibody to BSA significantly improved the electrokinetic behavior of the target protein. Adding a secondary antibody conjugated with amine‐rich quantum dots to the sample further facilitated the concentrating effect of ITP, reduced experiment time, and elevated the stacking ratio. Under our optimized experimental conditions, the cationic ITP‐based paper device electrophoretically stacked 94% of loaded BSA in less than 7 min. Our results demonstrate that the technique has a broad potential for rapid and cost‐effective isotachphoretic analysis of multiplex protein biomarkers in serum samples at the point of care.
Explorations of the optimal method for isolating oocytes from zebrafish (Danio rerio) ovary
Authors: Zhan Chunhua , Liu Wanjing , Hegazy Abeer M. , Zhang Tongzhou , Kawan Atufa , Zhang Xuezhen 
Published: January 2019

AbstractObtaining oocytes from the adult female zebrafish (Danio rerio) ovary has enormous importance in the studies of developmental biology, toxicology, and genetics. It is vital to establish a simple and effective approach to ensure the quantity and quality of oocytes, which will enable the success of follow‐up experimental investigation finally. Usually, oocytes are separated with mechanical or enzymatic methods, however, little studies have been done with concerns about the comparative effects. The present study separated zebrafish oocytes of Stage III with five frequently used methods, including stripping, pipetting, hyaluronidase (1.6 mg/ml), collagenase (0.4 mg/ml), and trypsin (0.1%). The cell viability, oxidative stress, mitogen‐activated protein kinase (MAPK) protein phosphorylation, and apoptosis levels were selected as main biomarkers to evaluate the oocytes health status. The results showed that both trypsin and hyaluronidase isolation significantly upregulated germinal vesicle breakdown (GVBD) rates and downregulated p38 MAPK activity simultaneously. GVBD rates and survival rates were decreased notably in oocytes separated by the collagenase method. Above results indicate that zebrafish oocytes in vitro are sensitive to enzymatic treatments and the enzymatic isolation is not the suitable mean for collecting zebrafish oocytes although it is time‐saving. The mechanical strategy of pipetting remarkably increased the reactive oxygen species and malondialdehyde level in isolated oocytes. Interestingly, oocytes separated with stripping show less physiological and biochemical damages. Therefore, stripping isolation is comparatively recommended as the optimum method for separating and collecting numerous intact and healthy zebrafish oocytes in vitro for the subsequent developmental research.
Association between the LIPG polymorphisms and serum lipid levels in the Maonan and Han populations
Authors: Yang Shuo , Yin Rui‐Xing , Miao Liu , Zhang Qing‐Hui , Zhou Yong‐Gang , Wu Jie 
Published: January 2019

AbstractIntroductionThe Maonan population is a relatively isolated minority in China. Little is known about endothelial lipase gene (LIPG) single nucleotide polymorphisms (SNPs) and serum lipid levels in the Chinese populations. The present study aimed to detect the association of several LIPG SNPs and environmental factors with serum lipid levels in the Chinese Maonan and Han populations.MethodsIn total, 773 subjects of Maonan ethnicity and 710 participants of Han ethnicity were randomly selected from our previous stratified randomized samples. Genotypes of the LIPG rs2156552, rs4939883 and rs7241918 SNPs were determined by polymerase chain reaction‐restriction fragment length polymorphism, and then confirmed by direct sequencing.ResultsThe allelic (rs2156552, rs4939883 and rs7241918) and genotypic (rs2156552 and rs4939883) frequencies were different between the two ethnic groups (p < 0.05–0.01). The minor allele carriers had lower apolipoprotein (Apo)A1/ApoB ratio (rs2156552 and rs7241918), high‐density lipoprotein cholesterol (HDL‐C) and apolipoprotein (Apo)A1 (rs2156552) levels and higher ApoB levels (rs4939883) in the Han population, and lower HDL‐C (rs2156552, rs4939883 and rs7241918) levels in the Maonan minority than the minor allele non‐carriers (p < 0.0167 after Bonferroni correction). Subgroup analyses according to sex showed that the minor allele carriers had a lower ApoA1/ApoB ratio (rs2156552 and rs7241918) and higher ApoB levels (rs7241918) in Han males, and lower ApoA1 and HDL‐C levels in Maonan females than the minor allele non‐carriers (p < 0.0167–0.001).ConclusionsThe present study demonstrates the association between the LIPG polymorphsims and serum lipid levels in the two ethnic groups. These associations might have an ethnic‐ and or/sex‐specificity.
Graphene‐Based Bimorph Actuators with Dual‐Response and Large‐Deformation by a Simple Method
Authors: Chang Longfei , Huang Majing , Qi Ke , Jing Zhuang , Yang Lulu , Lu Pin , Hu Ying , Wu Yucheng 
Published: January 2019

AbstractThere is a high demand for the design of high‐performance soft actuators with multi‐stimuli response and easy fabrication. Here, soft bimorph actuators consisting of graphene and polypropylene are fabricated by the drop‐coating of graphene film and subsequent adhesion of polypropylene on the graphene film. The fabrication method is simple, fast, and scalable, and this bimorph actuator exhibits optically and electrically induced actuation with large and reversible deformation (angle change > 100°), fast response (≈8 s), and low driving voltage (≤7 V). The remarkable actuation performance is mainly attributed to the thermally induced expansion of the polypropylene film, bimorph structure, and the energy conversion property of the graphene. Because of the dual‐responsiveness and large‐deformation, this actuator can be used to construct diversely biomimetic devices with smart mechanical output. As an example, an artificial flower composed of four pieces of the actuator is fabricated to show optically and electrically driven blooming. These results open the way for using a simple method for the construction of soft actuators and smart devices toward practical biomimetic applications.
New QSPR Models to Predict the Flammability of Binary Liquid Mixtures
Authors: Fayet Guillaume , Rotureau Patricia 
Published: January 2019

AbstractNew Quantitative Structure‐Property Relationships (QSPR) are presented to predict the flash point of binary liquid mixtures, based on more than 600 experimental flash points for 60 binary mixtures. Two models are proposed based on a GA‐MLR approach that uses a genetic algorithm (GA) variable selection in multilinear regressions (MLR). In these models, mixtures were characterized by a series of mixture descriptors calculated from various mixture formula combining the molecular descriptors of the single compounds constituting the mixtures and their respective molar fractions in the mixture. The best model demonstrated good predictive capabilities with a mean absolute error of only 7.3 °C estimated for an external validation set. Moreover, this model is focused on mixture descriptors applicable to more complex mixtures, i. e. constituted of more than 2 components, and already demonstrated interesting predictions for a series of ternary mixtures.
Improved repeatability of dynamic contrast‐enhanced MRI using the complex MRI signal to derive arterial input functions: a test‐retest study in prostate cancer patients
Authors: Klawer Edzo M.E. , van Houdt Petra J. , Simonis Frank F.J. , van den Berg Cornelis A.T. , Pos Floris J. , Heijmink Stijn W.T.P.J. , Isebaert Sofie , Haustermans Karin , van der Heide Uulke A. 
Published: January 2019

PurposeThe arterial input function (AIF) is a major source of uncertainty in tracer kinetic (TK) analysis of dynamic contrast‐enhanced (DCE)‐MRI data. The aim of this study was to investigate the repeatability of AIFs extracted from the complex signal and of the resulting TK parameters in prostate cancer patients.MethodsTwenty‐two patients with biopsy‐proven prostate cancer underwent a 3T MRI exam twice. DCE‐MRI data were acquired with a 3D spoiled gradient echo sequence. AIFs were extracted from the magnitude of the signal (AIFMAGN), phase (AIFPHASE), and complex signal (AIFCOMPLEX). The Tofts model was applied to extract Ktrans, kep and ve. Repeatability of AIF curve characteristics and TK parameters was assessed with the within‐subject coefficient of variation (wCV).ResultsThe wCV for peak height and full width at half maximum for AIFCOMPLEX (7% and 8%) indicated an improved repeatability compared to AIFMAGN (12% and 12%) and AIFPHASE (12% and 7%). This translated in lower wCV values for Ktrans (11%) with AIFCOMPLEX in comparison to AIFMAGN (24%) and AIFPHASE (15%). For kep, the wCV was 16% with AIFMAGN, 13% with AIFPHASE, and 13% with AIFCOMPLEX.ConclusionRepeatability of AIFPHASE and AIFCOMPLEX is higher than for AIFMAGN, resulting in a better repeatability of TK parameters. Thus, use of either AIFPHASE or AIFCOMPLEX improves the robustness of quantitative analysis of DCE‐MRI in prostate cancer.