nils-herrmann/clean_scirepeval huggingface dataset:
Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials
Year: 2020

In this work, a rational design and construction of porous spherical NiO@NiMoO4 wrapped with PPy was reported for the application of high performance supercapacitor (SC) The results show that the NiMoO4 modification changes the morphology of NiO, and the hollow internal morphology combined with porous outer shell of NiO@NiMoO4 and NiO@NiMoO4@PPy hybrids shows an increased specific surface area (SSA) and then promotes the transfer of ions and electrons. The shell of NiMoO4 and PPy with high electronic conductivity decreases the charge transfer reaction resistance of NiO, and then improves the electrochemical kinetics of NiO. At 20 A g 1, the initial capacitances of NiO, NiMoO4, NiO@NiMoO4 and NiO@NiMoO4@PPy are 456.0, 803.2, 764.4 and 941.6 F g 1, respectively. After 10,000 cycles, the corresponding capacitances are 346.8, 510.8, 641.2 and 904.8 F g 1, respectively. Especially, the initial capacitance of NiO@NiMoO4@PPy is 850.2 F g 1, and remains 655.2 F g 1 with a high retention of 77.1% at 30 A g 1 even after 30,000 cycles. The calculation result based on density function theory shows that the much stronger Mo O bonds are crucial for stabilizing the NiO@NiMoO4 composite, resulting in a good cycling stability of these materials.
Switchable valley filter based on a graphene p n junction in a magnetic field
Year: 2017

Low energy excitations in graphene exhibit relativistic properties due to the linear dispersion relation close to the Dirac points in the first Brillouin zone. Two of the Dirac points located at opposite corners of the first Brillouin zone can be chosen as inequivalent, representing a new valley degree of freedom, in addition to the charge and spin of an electron. Using the valley degree of freedom to encode information has attracted significant interest, both theoretically and experimentally, and gave rise to the field of valleytronics. We study a graphene p n junction in a uniform out of plane magnetic field as a platform to generate and controllably manipulate the valley polarization of electrons. We show that by tuning the external potential giving rise to the p n junction we can switch the current from one valley polarization to the other. We also consider the effect of different types of edge terminations and present a setup where we can partition an incoming valley unpolarized current into two branches of valley polarized currents. The branching ratio can be chosen by changing the location of the p n junction using a gate.
Creep testing of concrete since setting time by means of permanent and repeated minute long loadings
Year: 2016

Monitoring the evolution of early age properties of concrete is necessary to provide input data to the models of prediction of the behavior of concrete structures since setting time. The experimental challenge lies in the fact that this monitoring must be fully automatic since the earliest age because the hardening process of the concrete takes place continuously over a period counted in hours and even in days after the casting time. This research paper presents a new methodology developed at ULB and IFSTTAR to monitor the creep and relaxation of an ordinary concrete chosen as reference concrete since setting time. Compressive creep rigs and two test devices were used: at ULB, a Temperature Stress Testing Machine (TSTM) specifically designed for testing concrete since setting time under free and restraint conditions and at IFSTTAR, a test set up called BTJASPE developed to monitor, in compression, the modulus of elasticity, the creep and the relaxation of a concrete since very early age. For the sake of the study, the same concrete has been used in the two laboratories. In addition, this study is performed at a constant temperature to exclude this parameter, at this step of the study. The methodology is based on experimental measurements with two kinds of test. A classical creep test with permanent loading during one week and a repeated minute long loading test for which every 30 min, a loading is applied and kept constant during 5 min and finally totally removed. The classical test is used to characterize the non aging creep function and the repeated minute long loading test is used to quantify the aging creep functions.
Co creation and GVC Embedding:Study on the Innovation Network Governance of China's Auto Industry
Year: 2010

The implementation of the effective embedding in GVC,is one of the key issues of industrial development,upgrading innovation capability and international competitiveness in developing countries.At present,the core of value added in the value chain of auto industry is still controlled by developed countries,and the fracture between the third and second value chains of China's auto industry hinders its effective embedding in GVC,while the construction of co creation subsystems and formation of dynamically embedded co creation system characterized by the three level embedding governance upgrading both benefit,embedding China's auto industry in GVC and its innovation capability upgraded.
Advanced maturation of human cardiac tissue grown from pluripotent stem cells
Venue: Nature
Year: 2018

Cardiac tissues generated from human induced pluripotent stem cells (iPSCs) can serve as platforms for patient specific studies of physiology and disease1 6. However, the predictive power of these models is presently limited by the immature state of the cells1, 2, 5, 6. Here we show that this fundamental limitation can be overcome if cardiac tissues are formed from early stage iPSC derived cardiomyocytes soon after the initiation of spontaneous contractions and are subjected to physical conditioning with increasing intensity over time. After only four weeks of culture, for all iPSC lines studied, such tissues displayed adult like gene expression profiles, remarkably organized ultrastructure, physiological sarcomere length (2.2 um) and density of mitochondria (30% the presence of transverse tubules, oxidative metabolism, a positive force frequency relationship and functional calcium handling. Electromechanical properties developed more slowly and did not achieve the stage of maturity seen in adult human myocardium. Tissue maturity was necessary for achieving physiological responses to isoproterenol and recapitulating pathological hypertrophy, supporting the utility of this tissue model for studies of cardiac development and disease.A tissue culture system that provides an increasing intensity of electromechanical stimulation over time enables an in vitro model of cardiac tissue derived from human induced pluripotent stem cells to develop many of the characteristics of adult cardiac tissue.
Novel In Vitro In Vivo Extrapolation (IVIVE) Method to Predict Hepatic Organ Clearance in Rat
Venue: Pharmaceutical Research
Year: 2011

ABSTRACTPurposeDrug elimination in the liver consists of uptake, metabolism, biliary excretion, and sinusoidal efflux from the hepatocytes to the blood. We aimed to establish an accurate prediction method for liver clearance in rats, considering these four elimination processes. In vitro assays were combined to achieve improved predictions.MethodsIn vitro clearances for uptake, metabolism, biliary excretion and sinusoidal efflux were determined for 13 selected compounds with various physicochemical and pharmacokinetic properties. Suspended hepatocytes, liver microsomes and sandwich cultured hepatocytes were evaluated as in vitro models. Based on the individual processes, in vivo hepatic clearance was calculated. Subsequently, the predicted clearances were compared with the corresponding in vivo values from literature.ResultsUsing this in vitro in vivo extrapolation method good linear correlation was observed between predicted and reported clearances. Linear regression analysis revealed much improved prediction for the novel method (r2 0.928) as compared to parameter analysis using hepatocyte uptake only (r2 0.600) microsomal metabolism only (r2 0.687) or overall hepatobiliary excretion in sandwich cultured hepatocytes (r2 0.321).ConclusionsIn this new attempt to predict hepatic elimination under consideration of multiple clearance processes, in vivo hepatic clearances of 13 compounds in rats were well predicted using an IVIVE analysis method based on in vitro assays.
Gully erosion zonation mapping using integrated geographically weighted regression with certainty factor and random forest models in GIS.
Venue: Journal of environmental management
Year: 2019

Every year, gully erosion causes substantial damage to agricultural land, residential areas and infrastructure, such as roads. Gully erosion assessment and mapping can facilitate decision making in environmental management and soil conservation. Thus, this research aims to propose a new model by combining the geographically weighted regression (GWR) technique with the certainty factor (CF) and random forest (RF) models to produce gully erosion zonation mapping. The proposed model was implemented in the Mahabia watershed of Iran, which is highly sensitive to gully erosion. Firstly, dependent and independent variables, including a gully erosion inventory map (GEIM) and gully related causal factors (GRCFs) were prepared using several data sources. Secondly, the GEIM was randomly divided into two groups: training (70% and validation (30% datasets. Thirdly, tolerance and variance inflation factor indicators were used for multicollinearity analysis. The results of the analysis corroborated that no collinearity exists amongst GRCFs. A total of 12 topographic, hydrologic, geologic, climatologic, environmental and soil related GRCFs and 150 gully locations were used for modelling. The watershed was divided into eight homogeneous units because the importance level of the parameters in different parts of the watershed is not the same. For this purpose, coefficients of elevation, distance to stream and distance to road parameters were used. These coefficients were obtained by extracting bi square kernel and AIC via the GWR method. Subsequently, the RF CF integrated model was applied in each unit. Finally, with the units combined, the final gully erosion susceptibility map was obtained. On the basis of the RF model, distance to stream, distance to road and land use/land cover exhibited a high influence on gully formation. Validation results using area under curve indicated that new GWRCFRF approach has a higher predictive accuracy 0.967 (96.7% than the individual models of CF 0.763 (76.3% and RF 0.776 (77.6% and the CF RF integrated model 0.897 (89.7% Thus, the results of this research can be used by local managers and planners for environmental management.
Robust communication connectivity for multi robot path coordination using Mixed Integer Nonlinear Programming: Formulation and feasibility analysis
Venue: 2013 IEEE International Conference on Robotics and Automation
Year: 2013

Mixed Integer Nonlinear Programming (MINLP) techniques are increasingly used to address challenging problems in robotics, especially Multi Vehicle Motion Planning (MVMP) A particular challenge in using this framework is encoding stochastic phenomena such as communication connectivity in the form of MINLP constraints. The main contribution of this paper is an analytical formulation of communication connectivity constraints using stochastic physical layer communication models. These constraints account for the log normal channel shadowing in noisy communication environments and specify inter vehicle connectivity in terms of the outage probability of communication. A method is developed to provably accord robustness to communication failure by specifying an upper bound on the outage probability in terms of the inter vehicle communication range. Finally, we demonstrate the utility of this formulation in the context of a realistic decentralized Multi Vehicle Path Coordination (MVPC) scenario in which multiple robotic vehicles travel along predetermined fixed paths and are required to maintain communication connectivity during their transit. Conditions that affect the feasibility of the MVPC problem are formalized. Examples that assist in visualizing these conditions are provided.
La religion bajo la perspectiva evolucionista de Daniel Dennett
Year: 2016

La intencion que guia este trabajo es caracterizar la posicion que Dennett, des de su perspectiva de la teoria evolutiva, asume frente a la religion. Bajo una metodologia descriptiva este articulo da a conocer el escenario desde el cual Dennett estudia la religion en medio de grandes avances cientificos y del res quebrajamiento de las formas institucionales, entendiendo que, si bien su critica, por darse fuera de las lineas rectoras de una reflexion tradicional del fenomeno religioso, puede parecer infundada, ella va a incidir, se quiera o no, gracias a la gran divulgacion del pensamiento de Dennett, en la percepcion que van a tener no solo las personas de la calle, sino incluso los nuevos teoricos de la religion. La critica de Dennett a la religion no agota sin embargo, una gran conviccion: si bien la persona sale del mundo, de la materialidad y de la animalidad, se levanta y emerge por encima del mundo de la cultura y de la libertad en busca de su ultimo sentido, que merece ser llamado Dios.
Relationship Between L2 Vocabulary Learning Strategies and Semi Contextualized Word Meaning Test Scores
Year: 2019

This study aims to reveal whether any specific type of vocabulary learning strategy (VLS) leads to higher scores on semi contextualized word meaning tests a multiple choice gap filling format in which short written contexts are provided. A total of 132 first year university students learning English as a foreign language completed a VLS questionnaire and a semi contextualized word meaning test. The relationship between these two variables was examined using Pearson's correlation analysis, confirmatory factor analysis, and exploratory factor analysis. The results demonstrated that the relationships between VLS use and test scores were very weak (rs .20) regardless of the strategy type. The smaller correlations compared to those reported in previous studies using vocabulary size tests may be caused by the more complicated constructs involved in the semi contextualized word meaning test, which requires not only receptive knowledge about word meanings, but also reading comprehension skills and knowledge about word forms and usage in a sentence. However, imagery strategies, such as creating a mental image of word forms, had a very weak but significant positive correlation with the test scores. Based on these results, this study further discusses how Japanese high school students who will take examinations that employ the semi contextualized word meaning test format should learn vocabulary.
Impact of class III obesity on outcomes and complications of transvaginal ultrasound guided oocyte pickup
Venue: F&S reports
Year: 2020

To assess the impact of class III obesity on outcomes and complications of transvaginal ultrasound guided oocyte pickup (OPU) Design Retrospective cohort study.  Hospital based fertility clinic.  All women undergoing OPU procedures during autologous in vitro fertilization (IVF) and oocyte banking cycles, grouped by patient body mass index (BMI: <25, 25 29.9, 30 34.9, 35 39.9, =40 kg/m2) Intervention(s) Transvaginal OPU under conscious sedation.  Sedation and procedure related parameters and complications. Result(s) A total of 2,141 OPU procedures in 1,579 patients were analyzed, including 121 OPU procedures in 94 patients with BMI =40 kg/m2. There was a statistically significant increase in total fentanyl and midazolam doses and procedure duration as BMI increased. Compared with patients with BMI <25 kg/m2, those with BMI =40 kg/m2 were more likely to require additional sedation during the procedure (adjusted odds ratio [aOR] 1.99; 95% confidence interval [CI] 1.14 3.49) The rate of difficult access was 28.9% for procedures with BMI =40 kg/m2 compared with 5.2% with BMI <25 kg/m2 (aOR 7.57; 95% CI, 4.66 12.29) The OPU was incomplete due to inaccessible follicles through a transvaginal approach in 18.2% of procedures with BMI =40 kg/m2 compared with 1.3% with BMI <25 kg/m2 (aOR 16.94; 95% CI, 8.24 34.84) The rates of sedation and procedure related complications were low, and none occurred in patients with BMI =40 kg/m2. Conclusion(s) There was no increased risk of complications for women with class III obesity undergoing OPU with conscious sedation. However, the operator was more likely to encounter difficult access and to incompletely aspirate follicles through a transvaginal approach.
Response surface optimization of prodigiosin production by phthalate degrading Achromobacter denitrificans SP1 and exploring its antibacterial activity
Venue: Preparative biochemistry biotechnology
Year: 2020

The role of various parameters like temperature, pH, blood bag concentration, agitation and incubation that influence the production of prodigiosin by Achromobacter denitrificans SP1 was determined. The Plackett Burman and Box Behnken experimental designs were employed to statistically optimize and find out the best combinational effect of parameters for the better yield of prodigiosin using blood bag as sole carbon and energy source for the growth of A. denitrificans SP1. The maximum (1.314 mg/ml) prodigiosin production was attained at a temperature of 24 degC, pH (8.8) and blood bag (1 g) as optimum; while the predicted value was 1.319 mg/ml with a correlation coefficient of 0.987; which signifies the fitness of the model. Antimicrobial activity of the prodigiosin was also evaluated and found to be an effective agent against bacterial pathogens including Staphylococcus aureus and Proteus mirabilis. Utilization of the plasticizer di (2 ethylhexyl)phthalate (DEHP) in blood bag and the production of antibacterial prodigiosin makes A. denitrificans SP1, an effective competitor toward the pathogenic bacterial disinfection and wastewater treatment processes.
Anisotropic mechanical properties of ultra incompressible, hard osmium diboride
Year: 2008

Borides of high electron density metals such as Os show promise as hard materials. Arc melting elemental osmium and boron under an argon atmosphere produced osmium diboride (OsB 2 Both a Vickers diamond microindenter and a Berkovich nanoindenter were used to measure hardness. Vickers microindentation indicates that the hardness of OsB 2 increases significantly with decreasing applied load. The average hardness reaches approximately 37 GPa as the applied load is lowered to 0.245 N. The hardness is found to be highly dependent on the crystallographic orientation. For the {010} grains, along the <100> direction, the average hardness is significantly higher than that in the orthogonal <001> direction. Cracks associated with pop in events in the nanoindentation load displacement curves are observed in the {010} grains. The measured Young's modulus of OsB 2 is 410 35 GPa, which is comparable to that obtained from first principles calculations.
Flexible Nash seeking using stochastic difference inclusions
Venue: 2015 American Control Conference (ACC)
Year: 2015

We present a novel algorithm designed to achieve robust convergence to Nash equilibria in non cooperative games, where players are not required to participate in the game for all time, neither to know the exact mathematical form of their cost function. In this algorithm each player employs stochastic probing dynamics that only require measurements of its own cost function, together with a dynamic time ratio mechanism that enforces its frequency of participation in the game to satisfy a time ratio constraint. The algorithm is modeled by a constrained stochastic difference inclusion with non unique solutions that encompass a complete set of admissible behaviors for each player. To characterize the convergence and stability properties of the system we introduce the notion of mean square practical exponential stability for constrained stochastic difference inclusions, as well as sufficient Lyapunov conditions that certify this property. Simulation examples are used to demonstrate the results.
Neural Nearest Neighbors Networks
Venue: NeurIPS
Year: 2018

Non local methods exploiting the self similarity of natural signals have been well studied, for example in image analysis and restoration. Existing approaches, however, rely on k nearest neighbors (KNN) matching in a fixed feature space. The main hurdle in optimizing this feature space w.r.t. application performance is the non differentiability of the KNN selection rule. To overcome this, we propose a continuous deterministic relaxation of KNN selection that maintains differentiability w.r.t. pairwise distances, but retains the original KNN as the limit of a temperature parameter approaching zero. To exploit our relaxation, we propose the neural nearest neighbors block (N3 block) a novel non local processing layer that leverages the principle of self similarity and can be used as building block in modern neural network architectures. We show its effectiveness for the set reasoning task of correspondence classification as well as for image restoration, including image denoising and single image super resolution, where we outperform strong convolutional neural network (CNN) baselines and recent non local models that rely on KNN selection in hand chosen features spaces.
Disentangling the effects of novelty, valence and trait anxiety in the bed nucleus of the stria terminalis, amygdala and hippocampus with high resolution 7T fMRI
Venue: NeuroImage
Year: 2017

&NA; The hippocampus and amygdala exhibit sensitivity to stimulus novelty that is reduced in participants with inhibited temperament, which is related to trait anxiety. Although the bed nucleus of the stria terminalis (BNST) is highly connected to the amygdala and is implicated in anxiety, whether the BNST responds to novelty remains unstudied, as well as how trait anxiety may modulate this response. Additionally how novelty, stimulus negativity and trait anxiety interact to affect activity in these areas is also unclear. To address these questions, we presented participants with novel and repeated, fearful and neutral faces, while measuring brain activity via fMRI, and also assessed participants' self reported trait anxiety. As the small size of the BNST makes assessing its activity at typical fMRI resolution difficult, we employed high resolution 7 Tesla scanning. Our results replicate findings of novelty sensitivity that is independent of valence in the hippocampus. Our results also provide novel evidence for a BNST novelty response toward neutral, but not fearful faces. We also found that the novelty response in the hippocampus and BNST was blunted in participants with high trait anxiety. Additionally, we found left amygdala sensitivity to stimulus negativity that was blunted for high trait anxiety participants. These findings extend past research on the response to novel stimuli in the hippocampus and amygdala at high resolution, and are the first to demonstrate trait anxiety modulated novelty sensitivity in the BNST that is dependent on stimulus valence. HighlightsThe BNST responds to the novelty of neutral, but not fearful, faces.The hippocampus exhibits a novelty response that is independent of valence.The novelty response in BNST and hippocampus is blunted by high trait anxiety.The left amygdala response to valence is blunted by high trait anxiety.