Miracle-dz/UniFAR-FTUs huggingface dataset:
Propane Oxydehydrogenation over Metal Tungstates

Metal tungstates containing Ni, Co, Zn, Fe, and Ce, and the binary system Ni{sub 0.5}Co{sub 0.5}WO{sub 4}, were investigated for the oxydehydrogenation of propane. It was found that the tungstates, in particular COWO{sub 4}, constitute a new class of catalysts holding some promise for paraffin oxydehydrogenation, in addition to the previously studied systems based on vanadium-containing compounds (1) and on nickel-cobalt-molybdates. There exists a striking difference between the now studied tungstates and the earlier studied molybdates, with CoWO{sub 4} being the most effective system among the tungstates (8% propylene yield at 20% conversion), while in molybdates NiMoO{sub 4} is most effective (10% propylene yield at 40% conversion). This observed, structure dependent Co for Ni switch was unexpected. The catalyst preparation, characterization, and evaluation was performed in an manner analogous to that described earlier, using the same instruments and catalytic units. The source of tungsten for the preparation of the tungstates was ammonium meta tungstate. Conversion, selectivity, and yield are defined as reported earlier, and carbon, hydrogen, and oxygen closures were typically better than 95%. 3 refs., 2 figs., 2 tabs.
Réduire la dimension des systèmes complexes : un regard sur l'émergence de la synchronisation

Complex systems are characterized by the emergence of macroscopic phenomena that cannot be explained by the properties of their basic constituents. Synchronization is one of these phenomena in which the interactions between oscillators generate coordinate collective behaviors. Graphs allow a precise representation of the interactions, while nonlinear dynamics describe the oscillations. Because of the subtle relationship between graphs and dynamics of oscillators, it is challenging to predict the emergence of synchronization. The goal of this master’s thesis is to develop new methods for simplifying complex systems of oscillators in order to reveal the mechanism causing synchronization. To this end, we introduce notions of graph theory and dynamical systems to define synchronization on sound mathematical basis. We then present existing sophisticated approaches for reducing the dimension of oscillator dynamics. Yet, the efficiency of these techniques is limited for dynamics on complex graphs. We thus develop an original method—specially adapted for graphs with heterogeneous properties—for reducing the dimensions of nonlinear dynamics. Our method generalizes previous approaches and uncovers multiple challenges related to the simplification of complex systems. In particular, the dimension reduction of a system comes up against a trichotomy: one must choose to conserve either the dynamical parameters, the local properties of the graph, or the global properties of the graph. We finally use our method to characterize mathematically and numerically the emergence of exotic synchronization states.
Genetic Variation in Color of Sweetpotato Flour Related to Its Use in Wheat-Based Composite Flour Products

ABSTRACT Sweetpotato flours vary widely in color depending on genotype, and when used in wheat-based composite flours, they will impart characteristic colors which may be favorable or unfavorable for particular food products. Sweetpotato flour (SPF) was prepared from 44 genotypes and analyzed for proximate composition and biochemical properties. The Hunter Color L*, a*, b* values of the dry SPF and their modified Pekar slicks (PS) with water and with alkali were measured. Polyphenol oxidase activity, α-amylase activity, and total sugar were significantly correlated to L* values of dry SPF and of their PS tests with water and with alkali. The yellow pigment level was significantly correlated to the yellowness (b*) of the dry flour and of the PS test with water, but less correlated to b* of the PS test with alkaline. The results indicated a complex biochemical basis to SPF color, and no single biochemical factor examined was adequate to predict the color of a food product made from SPF. However, the PS colo.
Interventions Carried Out In Primary Health Care To Deal With Overweight And Obesity - A Scoping Review

Introduction and objectives: overweight and obesity are important public health problems which have a negative impact on the quality of life of individuals and on health systems around the world. Primary Health Care (PHC) becomes a crucial health care model for addressing the problem of overweight and obesity. This study presents the protocol of a scoping review that aims to describe the interventions related to dealing with overweight and obesity in PHC, identifying the obstacles and facilitators for their implementation.Methods and Analysis : the scoping review protocol presented was based on the recommendations of the Prisma Extension for Scoping Reviews (PRISMA-SCR), as well as the framework proposed by Arksey and O’Malley. The research questions were elaborated by a multidisciplinary team of researchers, graduate students and professors belonging to a research group working in the area of ​​health policy and program evaluation. In addition, two pilot studies were carried out to refine the questions and to improve the online article research and consequently the protocol. The bibliometric databases that will be used are PUBMED, EBSCO, SCOPUS, WEB OF SCIENCE; using specific keywords for each database to orientate the search for original articles written in English. Every step of the research will be carried out by two researchers working independently. The steps include: searching the selected databases with the keywords; reading the title and summary of the articles found; reading the selected articles in full and transferring the data extracted from the articles to a table; a thematic analysis of the results.Ethics and Dissemination : the results of the scoping review will be published in a scientific journal and presented at conferences and other scientific events. It is hoped that the presentation and discussion of the findings of the scoping review proposed in this protocol can help researchers, health professionals and planners of PHC policies and programs to identify gaps in the literature, to reflect upon the experiments conducted around the world, and to explore possibilities for adapting successful interventions to varied geographical and cultural contexts.
Detecting Social Commerce: An Empirical Analysis on Yelp

Social commerce refers to the use of social media (or social network) to facilitate user participation in online businesses. The major configurations of social commerce websites fall into two classes, the social media with commercial features and the e-commerce websites with social networking capabilities. This paper is concerned with the question of whether the social networking functions can definitely help the e-commerce websites establish their social commerce. To answer this question, this study develops an analysis framework that incorporates four tasks: (1) explore the small-world and power-law properties of the friendship networks constructed by users of e-commerce websites, (2) detect homophily, (3) investigate social influence occurring among users, and (4) build a profile for the influencers in the network. Employing the framework to conduct an empirical analysis on the Yelp dataset, we gained insights into social commerce on Yelp, which reveals that the social networking functions do not work well and social commerce occurs only in a small user group. This study also shows a clear route by which Yelp can improve its social commerce, i.e., by encouraging more users to build friendships and by promoting users to use the social networking functions.
A New Modulation Strategy for Exploiting Discontinuous Conduction Mode in a Double-Input Three-Switch Bidirectional DC–DC Converter

A double-input bidirectional dc–dc converter, with an innovative architecture, exploiting the use of only three switches, is taken into account in this article. The modulation strategy proposed in the technical literature for controlling such a converter leads to a very low efficiency at low-load because the converter is only able to operate in continuous conduction mode when currents are low. A new modulation strategy, for exploiting discontinuous conduction mode, is here proposed. The efficiency increase is evaluated with a MATLAB/Simulink Plecs simulation model. The control algorithm and the simulation model are validated with experimental results carried out on a converter prototype.
Microstructures and Spectroscopic Properties of Cryptomelane-type Manganese Dioxide Nanofibers

Cryptomelane-type manganese dioxide (K-MnO2) nanofibers with typical diameters of 20−60 nm and lengths of 1−6 μm were prepared by reacting KMnO4 with MnSO4 under hydrothermal conditions. Rietveld refinement from synchrotron X-ray powder diffraction data showed that the K-MnO2 nanofibers crystallize in a body-centered tetragonal structure (space group I4/m) with unit cell parameters a = 9.8241(5) A and c = 2.8523(1) A and elongate along the direction. The K-MnO2 nanofibers had a mean chemical composition of K0.11(H3O)0.05MnO2. The optical band gap of the K-MnO2 nanofibers was estimated to be 1.32 eV based on the UV−visible absorption. The K-MnO2 nanofibers had four diagnostic infrared absorptions at 722, 593, 524, and 466 cm−l, which represents specific fingerprints of the vibrational features of MnO2 materials containing (2 × 2) + (1 × 1) tunnel structures. The Raman scattering spectrum of the K-MnO2 nanofibers had nine Raman bands with four main contributions at 183, 386, 574, and 634 cm−1 along wi.
Resonance Raman Scattering from Neutral and Doped Polyacetylene

A complete assignment for the modes obtained from resonance Raman scattering on cis- and trans-polyacetylene is reported. The Raman lines in the cis-isomer indicate a well expressed one dimensional behaviour of the chain. From the line profile and line position of the resonance enhanced CC stretch modes in the trans-isomer a chain length distribution of modified Gaussian form with a maximum at 30 CC double bonds and a half width of 20 CC bonds is deduced. The experimental results confirm the alternating bond model and lead to a sine wave chain potential with amplitude 1.9 eV. The effective mass of the π-electrons is determined for the first time experimentally to be equal to the free electron mass. Intercalating the cis-polymer with AsF5 results in a cis-trans-transition and a pronounced chain shortening. It is concluded from the experiments that the intercalating molecules precipitate between the chains. Es wird eine vollstandige Zuordnung der aus Resonanz-Ramanexperimenten erhaltenen Moden fur cis- und trans-Polyazetylen gegeben. Die Ramanlinien im cis-Isomer deuten auf ein gut ausgepragtes eindimensionales Verhalten der Ketten hin. Aus dem Linienprofil und der Linienlage der resonanzverstarkten Linie der CC-Streckmode im trans-Isomer kann eine Kettenlangenverteilung einer modifizierten Gausschen Form mit einem Maximum bei 30 CC-Bindungen und einer Breite von 20 CC Bindungen analysiert werden. Das Modell der alternierenden Bindungen wird bestatigt, wobei das sinusformige Potential eine Amplitude von 1,9 eV hat. Die effektive Masse der Elektronen wird erstmals experimentell als gleich der freien Elektronenmasse bestimmt. Interkalieren des cis-Polymers mit AsF5 fuhrt zu einem cis—trans-Ubergang und zu einer ausgepragten Kettenverkurzung. Aus den Experimenten kann geschlossen werden, das die interkalierten Molekule zwischen den Ketten auslagern.
Residential HVAC Aggregation Based on Risk-averse Multi-armed Bandit Learning for Secondary Frequency Regulation

As the penetration of renewable energy continues to increase, stochastic and intermittent generation resources gradually replace the conventional generators, bringing significant challenges in stabilizing power system frequency. Thus, aggregating demand-side resources for frequency regulation attracts attentions from both academia and industry. However, in practice, conventional aggregation approaches suffer from random and uncertain behaviors of the users such as opting out control signals. The risk-averse multi-armed bandit learning approach is adopted to learn the behaviors of the users and a novel aggregation strategy is developed for residential heating, ventilation, and air conditioning (HVAC) to provide reliable secondary frequency regulation. Compared with the conventional approach, the simulation results show that the risk-averse multi-armed bandit learning approach performs better in secondary frequency regulation with fewer users being selected and opting out of the control. Besides, the proposed approach is more robust to random and changing behaviors of the users.
Computation of Sensory-Affective Relationships Depending on Material Categories of Pictorial Stimuli

Exposure to stimuli gives rise to sensory and affective experiences. Computing the relationships between these experiences is instrumental to designing affectively appealing products and understanding human experiences. Hierarchical structures of sensory and affective responses, which can be built through adjective rating tasks, are regarded as an effective means for expressing relationships between sensory and affective responses. Naturally, these hierarchical structures depend on the type of stimulus; however, so far, their dependencies on material categories have yet to be examined. We therefore investigated how hierarchical structures of affective and sensory responses depend on seven material categories: fabric, leather, wood, paper, foliage, stone, and glass. Each material category had 100 visual representations selected from the Flickr Material Database. Thirty-nine participants were asked to rate 368 pictures across a set of materials. The questionnaire adjectives included visually- and haptically-centered items although the stimuli were purely visual. We found that the structures differed substantially among the material categories, although there were some commonalities. Particularly, the positions of polysemic or multimodal adjectives such as “light” and “uncomfortable” in the hierarchy were highly dependent on the material category. For example, “light” has both physical (lightweight) and psychological (e.g., non-solemn, cheerful) meanings. For stone and glass (generally considered to be of heavy weight), the psychological meanings were primarily considered. Conversely, the physical meanings were predominant for fabric, leather, wood, paper, and foliage, for which weight is a factor in judging quality. The present study helps interpret affective descriptors whose meanings vary among types of stimuli.
Integral Attacks on Some Lightweight Block Ciphers

At EUROCRYPT 2015, Todo proposed a new technique named division property, and it is a powerful technique to find integral distinguishers. The original division property is also named word-based division property. Later, Todo and Morii once again proposed a new technique named the bit-based division property at FSE 2016 and find more rounds integral distinguisher for SIMON-32. There are two basic approaches currently being adopted in researches under the bit-based division property. One is conventional bit-based division property (CBDP), the other is bit-based division property using three-subset (BDPT). Particularly, BDPT is more powerful than CBDP. In this paper, we use Boolean Satisfiability Problem (SAT)-aided cryptanalysis to search integral distinguishers. We conduct experiments on SIMON-32/-48/- 64/-96, SIMON (102)-32/-48/-64, SIMECK-32/-48/-64, LBlock, GIFT and Khudra to prove the efficiency of our method. For SIMON (102)-32/-48/-64, we can determine some bits are odd, while these bits can only be determined as constant in the previous result. For GIFT, more balanced (zero-sum) bits can be found. For LBlock, we can find some other new integral distinguishers. For Khudra, we obtain two 9-round integral distinguishers. For other ciphers, we can find the same integral distinguishers as before.
Virus‐Tethered Magnetic Gold Microspheres with Biomimetic Architectures for Enhanced Immunoassays

In immunoassays, non‐specific bindings to biosensing surfaces can be effectively prevented by formation of biocompatible and hydrophilic self‐assembled monolayer (SAM) on the surfaces. A thin gold (Au) layer on magnetic microspheres, 15 μm in diameter, enables facile SAM formation and thereby accepts second layer of filamentous virus scaffolds for the immobilization of functional proteins. The merger of the virus and SAM‐Au protected microspheres not only provides exceptionlly dense antibody loading, but also resembles biological cellular structures that enhance ligand‐receptor interactions. Site‐specific biotinylation of filamenous viruses allows formation of free‐standing virus threads (>1.0 × 1010) on streptavidin‐modified SAM‐Au microspheres. The augmented yield of antibody loading, due to the increased surface to volume ratio, on virus‐modified Au microspheres is confirmed by measuring fluorescence intensities. The bead‐based immunoassays for the detection of cardiac marker proteins exhibit increased sensitivity of virus‐Au microspheres, as low as 20 pg mL−1 of cardiac troponin I in serum, and extremely low non‐specific adsorption when compared with bare polymer beads. This increased sensitivity due to filamentous morphology and SAM‐Au layer demonstrates the feasibility of merging viruses with non‐biological materials to yield biomimetic tools for the enhanced bead‐based immunoassays.
Virtual reality in the zoo: A qualitative evaluation of a stereoscopic virtual reality video encounter with little penguins Eudyptula minor

Encounters between animals and humans in zoos and aquariums are being increasingly enhanced, mediated and extended using digital technologies. This article presents the results of research into the design, use and experience of stereoscopic (3D) 180o film viewed via a Virtual Reality (VR) headset at the zoo. This technology has recently emerged as an affordable consumer device with increasing uptake in education and museums. Drawing on research methodologies from the field of human-computer interaction, this project followed a ‘research-through-design’ approach, which sought to discover more about the potential of VR technologies in the zoo generally, through the process of designing a particular installation. This paper reports on the results of a qualitative interview-based study into zoo visitor experiences of using a specific VR installation, a 5-min video encounter that combined footage shot inside the little penguin Eudyptula minor enclosure during feeding, and behind-the-scenes preparation of food, with narration by the zookeeper in each scene. It was found that visitors had positive attitudes towards the use of VR video in the zoo as an addition to the experience of seeing live animals. The paper further discusses the specific opportunities for VR video via the key themes that emerged in the qualitative evaluation: cognitive immersion, emotional immersion, physical presence and social presence. This paper therefore supports further investigation of VR video as a form of visitor experience to be deployed alongside keeper talks, animal presentations and behind-the-scenes experiences, with clear opportunities for positive visitor experience, conservation caring, and ensuring the welfare of animals in captivity in zoos.
Modeling and Control for Open-Winding PMSM Under Open-Phase Fault Based on New Coordinate Transformations

In the open-winding permanent magnet synchronous motor (OW-PMSM) system fed by dual inverter with common dc bus, suitable control strategy should be adopted to suppress the torque ripple generated by the third harmonic flux and 0-axis current. However, the mathematical model will change when the motor is under open-phase fault so that the coordinate transformations and control strategy should be redesigned accordingly in order to suppress the torque ripple. In this article, the postfault OW-PMSM system is remodeled considering the third harmonic flux. Based on the postfault model, new coordinate transformations are designed to obtain a concise torque and decoupling voltage expressions for the simple and accurate control of torque. Moreover, the torque ripple is suppressed by modifying the current reference. In addition, a simple decoupling modulation is designed to directly obtain the switching signals for the dual inverter. Experimental results confirm the effectiveness of the proposed fault-tolerant control strategy.
Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

The surface structural characteristics of Fe quantum wires prepared by two electrochemical methods in solution were studied by their conductance changes caused by the interactions between the quantum wires and specific molecules. Once ascorbic acid was added into the solution, the conductance of the Fe junction decreased to a lower value while for the dopamine adsorption, the conductance showed no obvious change. We proposed that there were some iron(II) ions on the surface of atomic-scale Fe junction, not iron(III) ions, and these iron(II) ions played a significant role for the conductance change. This mechanism was further enhanced by the following two experiments. When exposing the quantum wire to sodium borohydride, the conductance increased to a higher value, and the conductance increase was also observed with an electrochemical reduction process, which provided additional evidence for the proposed
Cobalt(II) and Nickel(II) Complexes with Nitrogen, Sulfur, and Selenium Containing Heterocyclic Ligands

Cobalt(II) and nickel(II) halide complexes with thiomorpholin-3-thione and thiazolidine-2-selenone have been prepared. Infrared and far infrared spectra, electronic spectral studies, and magnetic susceptibility measurements indicate that the cobalt derivatives are tetrahedral in structure, nickel chloro- and bromo-thiomorpholin-3-thione derivatives are octahedral while [Nits2I2] and all nickel thiazolidine-2-selenone complexes have a pseudo-tetrahedral symmetry. The probable site of bonding in the ligands is nitrogen in all the complexes studied here, except the nickel derivatives of thiazolidine-2-selenone. These results are confirmed by n.m. r. measurements. Spectroscopic parameters for the complexes have been calculated and compared against similar chromophores containing MN2X2 and MS2X2 chromophores.
Improved Multi-Population Differential Evolution for Large-Scale Global Optimization

Diﬀerential evolution (DE) is an eﬃcient population-based search algo-rithm with good robustness, however, it is challenged to deal with high-dimensional problems. In this paper, we propose an improved multi-population diﬀerential evolution with best-and-current mutation strategy (mDE-bcM). The population is divided into three subpopulations based on the ﬁtness values, each of subpopulations uses diﬀerent mutation strategy. After crossover, mutation and selection, all subpopulations are updated based on the new ﬁtness values of their individuals. An improved mutation strategy is proposed, which uses a new approach to generate base vector that is composed of the best individual and current individual. The performance of mDE-bcM is evaluated on a set of 19 large-scale continuous optimization problems, a comparative study is carried out with other state-of-the-art optimization techniques. The results show that mDE-bcM has a competitive performance compared to the contestant algorithms and better eﬃciency for large-scale optimization problems.