bluuebunny/crossref_metadata_2025_split huggingface dataset:
Burgerparticipatie: ontwikkelingstypen van bewonersverbanden
Authors: de Zeeuw Anna , van Wijk Eelco , Straathof Alex 
Published: October 2019

Citizen participation: community enterprises in development types: Interaction between participation professionals and community enterprises in the spotlight
Local authorities expect citizens to fulfil an increasing number of public services. In that context, citizen-based networks are emerging as means to fulfil a variety of public tasks, varying from supporting young entrepreneurs and strengthening social cohesion, to providing local care. In this article, we address the following questions: Which phases do community enterprises pass through in their efforts towards realising a sustainable contribution and how do participation professionals support these phases? To respond to this question, researchers followed seven community enterprises based in Amsterdam over a two-year period. We identified a typology of four development phases, with particular attention to the interaction between external participation professionals and the key persons of community enterprises. The study has practical relevance for governance of citizen participation and also raises important follow-up questions about the role of the local government.
Performance Comparison of Evolutionary Algorithms in the Design of a Hand-Pump Shape Microstrip Antenna for 5G Applications
Authors: Kaur Navneet , Sharma Surbhi , Kaur Jaswinder 
Published: October 2019

In this work, a single element hand-pump shape microstrip patch antenna working at 3.4 GHz–3.8 GHz for future 5G applications is proposed. The overall dimensions of the proposed antenna are 34 mm × 28 mm × 1.6 mm. In order to obtain the desired bandwidth, three rectangular slots are etched from the radiating element along with the utilization of the defected ground structure. To optimize the geometrical parameters of the proposed antenna, performance comparison of various optimization techniques viz. Particle Swarm Optimization, Bat algorithm, Differential Evolution, and Artificial Bee Colony algorithm are presented. The performance of the antenna is analyzed with the help of S-parameter, gain, and radiation efficiency. The proposed antenna is resonant at 3.6 GHz with an impedance bandwidth of 400 MHz and the radiation efficiency of 74 %, which is quite appropriate for a single element 5G antenna. Further, the suggested antenna is fabricated and experimentally tested for the validation of results.
Molecular/Nanostructured Functional Metal Oxide Stacks for Nanoscale Nanosecond Information Storage
Authors: Balliou Angelika , Skarlatos Dimitrios , Papadimitropoulos Giorgos , Vouroutzis Nikolaos Z. , Boukos Nikos , Glezos Nikos 
Published: October 2019

AbstractThe metal oxide heterostructures market is exponentially growing, adhering to the trend of achieving fabrication versatility on a vast range of nonconventional electromagnetic and optical properties. A high degree of substrate tolerance and solution‐phase growth potential promise low‐cost flexible electronics and silicon‐based process compatibility. A molecule‐based complex oxide nanostructured stack integrated in an electro‐optically operable nonvolatile two‐terminal capacitive memory element is proposed. The cell demonstrates a remarkably high > 7 V memory window and write–read times down to 10 ns, promising for reliable high‐speed storage. Molecular orbital occupancy through broadband optical stimulus enables simultaneous phononic addressing and boosts the written information amount by up to 37%, achieving 10+ years storage duration. The resulting nonvolatile memories are the first‐documented complementary metal oxide semiconductor (CMOS)‐compatible long‐term‐retention molecular capacitive cell of its kind, implementing inherent structure‐emerging heat management. Great potential emerges for numerous energy‐inspired innovations, enabling functional oxide–molecular hybrids exploitation as high‐end nonvolatile memory products.
General Solvothermal Synthesis Method for Complete Solubility Range Bimetallic and High‐Entropy Alloy Nanocatalysts
Authors: Bondesgaard Martin , Broge Nils Lau Nyborg , Mamakhel Aref , Bremholm Martin , Iversen Bo Brummerstedt 
Published: October 2019

AbstractNanoalloys (NAs) have extraordinary catalytic properties, but metals are often immiscible giving compositional limits on catalytic design. It is generally believed that solution‐based chemical synthesis is inadequate for obtaining NAs, and often exotic shock synthesis or severe decomposition or reduction reactions are required. However, such methods only work on the laboratory scale making real‐world applications difficult. Here, a general solvothermal method is reported to obtain phase‐pure bimetallic and high‐entropy nano‐alloys across the entire composition range. Tuning of solvent chemistry and precursors leads to six different bimetallic NAs: PdxRu1‐x, PtxRu1‐x, IrxRu1‐x, RhxRu1‐x, Ir1‐xPtx, and Rh1‐xPtx, without immiscibility regions. All samples have face‐centered‐cubic crystal structures, which have not previously been observed for the ruthenium‐based systems. Additionally, quaternary and quinary systems are produced, demonstrating the ability to obtain medium‐ and high‐entropy NAs. The method described herein provides a simple, general production method of previously unknown solid solutions throughout their entire composition range potentially allowing for detailed tuning of nanocatalyst properties.
Polymer Template Synthesis of Flexible BaTiO3 Crystal Nanofibers
Authors: Yan Jianhua , Han Yuhui , Xia Shuhui , Wang Xiao , Zhang Yuanyuan , Yu Jianyong , Ding Bin 
Published: October 2019

AbstractBaTiO3 crystals are attractive materials due to their high dielectric properties, but they are brittle and inelastic ceramics, which limits their broader applications in emerging fields, such as flexible electronics. A scalable strategy for the fabrication of ultra‐flexible crystalline BaTiO3 nanofiber (NF) films by a sol–gel electrospinning method, followed by a brief calcination, is reported. It facilitates the formation of perovskite BaTiO3 crystals with intricate grain boundaries at a low temperatures by growing them within polymer NF templates. The ceramic films have a polymer‐like softness of 50 mN, a large Young's modulus of 61 MPa, and an elastic strain of 0.9%. Moreover, they have a low density of 28 mg cm−3 and demonstrate superior softness without fracture after deformation. Piezoelectric sensors fabricated based on these films exhibit a high sensitivity of 80 ms with an output voltage of 1.05 V at a pressure of 100 kPa. This approach allows for the large‐scale fabrication of flexible BaTiO3 crystal NF films.
2D Mechanical Metamaterials with Widely Tunable Unusual Modes of Thermal Expansion
Authors: Ni Xiaoyue , Guo Xiaogang , Li Jiahong , Huang Yonggang , Zhang Yihui , Rogers John A. 
Published: October 2019

AbstractMost natural materials expand uniformly in all directions upon heating. Artificial, engineered systems offer opportunities to tune thermal expansion properties in interesting ways. Previous reports exploit diverse design principles and fabrication techniques to achieve a negative or ultralow coefficient of thermal expansion, but very few demonstrate tunability over different behaviors. This work presents a collection of 2D material structures that exploit bimaterial serpentine lattices with micrometer feature sizes as the basis of a mechanical metamaterials system capable of supporting positive/negative, isotropic/anisotropic, and homogeneous/heterogeneous thermal expansion properties, with additional features in unusual shearing, bending, and gradient modes of thermal expansion. Control over the thermal expansion tensor achieved in this way provides a continuum‐mechanics platform for advanced strain‐field engineering, including examples of 2D metamaterials that transform into 3D surfaces upon heating. Integrated electrical and optical sources of thermal actuation provide capabilities for reversible shape reconfiguration with response times of less than 1 s, as the basis of dynamically responsive metamaterials.
A Low‐Cost Laser‐Based Nano‐3D Polymer Printer for Rapid Surface Patterning and Chemical Synthesis of Peptide and Glycan Microarrays
Authors: Eickelmann Stephan , Tsouka Alexandra , Heidepriem Jasmin , Paris Grigori , Zhang Junfang , Molinari Valerio , Mende Marco , Loeffler Felix F. 
Published: October 2019

AbstractA low‐cost laser‐based printing setup is presented, which allows for the spot‐wise patterning of surfaces with defined polymer nanolayers. These nanolayer spots serve as a “solid solvent,” embedding different chemicals, chemical building blocks, materials, or precursors and can be stacked on top of each other. By melting the spot pattern, the polymer‐embedded molecules are released for chemical reaction. This enables researchers to quickly pattern a surface with different molecules and materials, mixing them directly on the surface for high‐throughput chemical synthesis to generate and screen diverse microarray libraries. In contrast to expensive ink‐jet or contact printing, this approach does not require premixing of inks, which enables in situ combinatorial mixing. Easy access and versatility of this patterning approach are shown by generating microarrays of various biomolecules, such as glycans for the first time, to screen interactions of antibodies and lectins. In addition, a layer‐by‐layer solid‐phase synthesis of peptides directly on the microarray is presented. Amino acid–containing nanolayers are repeatedly laser‐transferred and reacted with the functionalized acceptor surface in defined patterns. This simple system enables a reproducible array production, down to spot‐to‐spot distances of 100 µm, and offers a flexible and cheap alternative to expensive spotting robot technology.
Synthesis of Isoxazolines from Nitroalkanes via a [4+1]‐Annulation Strategy
Authors: Ushakov Pavel Yu. , Khatuntseva Elizaveta A. , Nelyubina Yulia V. , Tabolin Andrey A. , Ioffe Sema L. , Sukhorukov Alexey Yu. 
Published: October 2019

AbstractA novel access to isoxazolines was developed using the [4+1]‐annulation of α‐keto‐stabilized sulfur ylides with N,N‐bis(siloxy)enamines derived from aliphatic nitro compounds. The resulting 5‐keto‐substituted isoxazolines were shown to be convenient precursors of polysubstituted 3‐hydroxypyrrolidines via the one‐pot catalytic N−O hydrogenolysis/intramolecular reductive amination sequence. Application of this approach to the formal synthesis of Merck's potent NK1 receptor antagonist was demonstrated.magnified image
Large‐Spin‐Gap Nodal‐Line Half‐Metal and High‐Temperature Ferromagnetic Semiconductor in Cr2X3 (X=O,S,Se) Monolayers
Authors: Chen Jian‐Yong , Li Xing‐Xing , Zhou Wen‐Zhe , Yang Jin‐Long , Ouyang Fang‐Ping , Xiong Xiang 
Published: October 2019

AbstractTwo‐dimensional (2D), high‐temperature, half‐metal ferromagnetic semiconductors with large spin gap and topological band structures are highly desirable for novel nanoscale spintronic applications. A family of stable 2D honeycomb‐Kagome Cr2X3 (X=O,S,Se) monolayers is proposed through first‐principles calculations. Buckled Cr2O3 is a ferromagnetic semiconductor with large out‐of‐plane magnetocrystalline anisotropy energy and a predicted Curie temperature of 332 K under moderate biaxial tensile strain. Planar Cr2S3 and Cr2Se3 are ferromagnetic half‐metals with mirror‐symmetry‐protected nodal lines for spin‐down channel and large direct gap (4.59 and 4.76 eV) for spin‐up channel. The Fermi velocities for Cr2S3 and Cr2Se3 are 2.1×105 and 1.5×105 m s−1, respectively, which is comparable with that of silicene, 5.3 × 105 m s−1. Their Berezinskii–Kosterlitz–Thouless transition temperatures are determined to be as high as 445 and 695 K. In addition, their half metallicity can be well maintained on h‐BN nanosheets and is immune to chemical perturbation and mechanical strain. Its fascinating magnetic properties and topological nodal lines render 2D Cr2X3 (X=O,S,Se) suitable for novel spintronic devices and exotic quantum applications.
Extending the UNIFAC model for ionic liquid–solute systems by combining experimental and computational databases
Authors: Song Zhen , Zhou Teng , Qi Zhiwen , Sundmacher Kai 
Published: October 2019

AbstractConsidering that the predictive UNIFAC model is highly valuable for the solvent selection, process design and optimization of separation tasks, a large extension of this model to ionic liquid (IL)–solute systems is presented by combining experimental and COSMO‐RS derived databases. The experimental infinite dilution activity coefficient (γ∞) data of different solutes in ILs are first collected exhaustively to extend UNIFAC‐IL to cover all involved IL and conventional functional groups. Afterwards, the experimental and COSMO‐RS calculated γ∞ are compared for different types of solutes to evaluate the potential of using COSMO‐RS predictions as quasi‐experimental data for further UNIFAC‐IL extension. In the cases where COSMO‐RS can provide quantitatively accurate predictions after calibration, additional γ∞ database is specifically generated to regress more group interaction parameters in the UNIFAC‐IL model. Finally, a large experimental liquid–liquid and vapor–liquid equilibria database is collected and employed to evaluate the predictive performance of the obtained γ∞‐based UNIFAC‐IL model.
Trapping region of impinging jets in a cross‐shaped channel
Authors: Zhang Jing‐wei , Yao Tian‐liang , Li Wei‐feng , El Hassan Mouhammad , Xu Xin‐lei , Liu Hai‐feng , Wang Fu‐chen 
Published: October 2019

AbstractThis study follows our previous report (Zhang et al., Phys. Fluids, vol. 31, 2019, 034105) by describing the formation and evolution of the engulfment flow in the cross‐shaped channel. First, the flow regimes were studied by planar laser induced fluorescence (PLIF). Results show the formation of a spiral vortex in the center of the chamber and the appearance of a well‐mixed zone inside the spiral vortex. Second, we proposed a novel experimental method to analyze the residence time of the fluid in the chamber, and discover an unexpected trapping region inside the well‐mixed zone. There is almost no fluid transport into or out of this region. Furthermore, three‐dimensional numerical simulation is used to reveal the origination of this trapping region. Simulation results reveal that the fluid recirculates in the trapping region and the flow feature is caused by the bubble‐type vortex breakdown.
Adsorption of bark derived polyphenols onto functionalized nanocellulose: Equilibrium modeling and kinetics
Authors: Asante Bright , Sirviö Juho A. , Li Panpan , Lavola Anu , Julkunen‐Tiitto Riitta , Haapala Antti , Liimatainen Henrikki 
Published: October 2019

AbstractThis article describes the kinetics and capacity of adsorbing condensed conifer tannins onto cationic cellulose nanocrystals (CCNCs). Batch adsorption experiments were carried as a function of pH, contact time, and initial tannin concentration with constant cationic cellulose nanocrystal concentration (0.01%). The adsorption process was highly pH dependent as adsorption capacities ranged from 13.2 mg/g to 112.7 mg/g at pH of 3–10. The amount of tannin adsorbed per unit mass of the cationic cellulose nanocrystals increased with increasing of tannin concentration until equilibrium was attained. The experimental data followed the Langmuir adsorption model, and the maximum experimental and theoretical adsorption capacities for the cationic nanocrystals reached 1,008 mg/g and 1,111 mg/g, respectively. The kinetics of adsorption was described best by the pseudo‐second‐order kinetics indicating a chemisorption process. The inherent adsorption has interesting applications for CCNC‐complexes with natural polyphenolics in green chemical applications for adhesives, adsorbents, preservatives, and packaging materials.
Development of reaction–diffusion DFT and its application to catalytic oxidation of NO in porous materials
Authors: Liu Yu , Liu Honglai 
Published: October 2019

AbstractThe reaction–diffusion (RD) process is an important and complex subject that involves nonequilibrium modeling and multiscale calculations and may be applied to multiple fields. State‐of‐art theories are computationally too expensive for real‐world applications. We propose a novel classical density functional theory (CDFT) for RD modeling by combining ordinary time‐dependent density functional theory (TDDFT) and reaction kinetic models to examine the multiscale RD process. The theory is applied to NO oxidation in porous materials. The uptake, flux, and density profiles are examined, to reveal that the shape of the pore could influence the selectivity of adsorption between the reactant and product, which further leads to variations in the catalytic efficiency. It is noted that open pores are more favorable for catalytic reactions. The importance of adsorption is examined in the presence as well as the absence of pore–gas attraction. Without attraction, the catalytic efficiency is decreased by three orders of magnitude.
Barcoding Biological Reactions with DNA‐Functionalized Vesicles
Authors: Peruzzi Justin A. , Jacobs Miranda L. , Vu Timothy Q. , Wang Kenneth S. , Kamat Neha P. 
Published: October 2019

AbstractTargeted vesicle fusion is a promising approach to selectively control interactions between vesicle compartments and would enable the initiation of biological reactions in complex aqueous environments. Here, we explore how two features of vesicle membranes, DNA tethers and phase‐segregated membranes, promote fusion between specific vesicle populations. Membrane phase‐segregation provides an energetic driver for membrane fusion that increases the efficiency of DNA‐mediated fusion events. The orthogonality provided by DNA tethers allows us to direct fusion and delivery of DNA cargo to specific vesicle populations. Vesicle fusion between DNA‐tethered vesicles can be used to initiate in vitro protein expression to produce model soluble and membrane proteins. Engineering orthogonal fusion events between DNA‐tethered vesicles provides a new strategy to control the spatiotemporal dynamics of cell‐free reactions, expanding opportunities to engineer artificial cellular systems.
Interplay Between J‐ and H‐Type Coupling in Aggregates of π‐Conjugated Polymers: A Single‐Molecule Perspective
Authors: Eder Theresa , Vogelsang Jan , Bange Sebastian , Remmerssen Klaas , Schmitz Daniela , Jester Stefan‐S. , Keller Tristan J. , Höger Sigurd , Lupton John M. 
Published: October 2019

AbstractStrong dipole–dipole coupling within and between π‐conjugated segments shifts electronic transitions, and modifies vibronic coupling and excited‐state lifetimes. Since J‐type coupling between monomers along the conjugated‐polymer (CP) chain and H‐type coupling of chromophores between chains of a CP compete, a superposition of the spectral modifications arising from each type of coupling emerges, making the two couplings hard to discern in the ensemble. We introduce a single‐molecule H‐type aggregate of fixed spacing and variable length of up to 10 nm. HJ‐type aggregate formation is visualized intuitively in the scatter of single‐molecule spectra.
Quantification of the Charge Consuming Phenomena under High‐Voltage Hold of Carbon/Carbon Supercapacitors by Coupling Operando and Post‐Mortem Analyses
Authors: Przygocki Patryk , Ratajczak Paula , Béguin François 
Published: October 2019

AbstractEnhancing the operating voltage of supercapacitors (SCs), hence their specific energy, is important. However, long‐term hold at high voltage entails loss of capacitance, increase of resistance and internal pressure. Such detrimental effects could be reduced by obtaining quantitative information on the relative impact of the various mechanisms leading to the worsening of the SCs performance. Now, for a carbon/carbon supercapacitor in aqueous Li2SO4, a self‐consistent approach is used to assign leaking charge during high voltage hold to the charge: 1) distributed throughout the electrochemical cell (steady‐state leakage current measurements), 2) spent at each electrode for gases production (operando electrochemical mass spectrometry (EMS) analysis and pressure records), 3) utilized to oxidize the electrodes surface (from post‐mortem surface functionality determination by temperature programmed desorption (TPD)), and 4) used for other parasitic reactions.
The Role of miR‐326 in Adipogenic Differentiation of Human Adipose‐Derived Stem Cells by Targeting C/EBPα in vitro
Authors: Feng Yanting , Zhou Lanting , Peng Yan , Yang Yuchao , Fan Tingyu , Jiang Xin , Dai Jingxing , Ouyang Jun 
Published: October 2019

ABSTRACTThe CCAAT‐enhancer‐binding protein α (C/EBPα) plays an important role in adipogenic differentiation of adipose‐derived stem cells (ASC). Recent studies have shown that microRNAs (miRNAs) participate in the regulation of self‐renewal, proliferation, and multi‐directional differentiation of ASCs. In the present study, we analyzed the targeting miRNAs on C/EBPα and found that miR‐326 played an essential role in it. The results of qPCR confirmed that the expression of miR‐326 was reduced in adipogenic differentiation. In addition, the dual‐luciferase reporter assay system verified binding between miR‐326 and the 3′ untranslated region of C/EBPα. Furthermore, transfection of miR‐326 into human adipose‐derived stem cells caused a significant reduction in C/EBPα. Our results highlight the importance of miR‐326 in adipogenic differentiation and provide a reliable basis for clinical treatment of adipose‐related diseases. Anat Rec, 2019. © 2019 American Association for Anatomy Anat Rec, 303:2054–2060, 2020. © 2019 American Association for Anatomy
Skull Anatomy and Pneumaticity of the Enigmatic Coelurosaurian Theropod Bicentenaria argentina.
Authors: Aranciaga Rolando Alexis M. , Cerroni Mauricio A. , Novas Fernando E. 
Published: October 2019

ABSTRACTThe enigmatic basal coelurosaur Bicentenaria argentina is a small theropod that comes from the Upper Cretaceous of Patagonia. It is constituted by more than 130 elements, including cranial remains. These are represented by an incomplete snout, palate, dermatocranium, and lower jaws still in articulation. The skull material of Bicentenaria was preliminarily studied by previous authors. In this study, we conducted a CT scan of the holotype of Bicentenaria, which allowed us to fully describe all preserved skull bones, including some previously unknown elements. The morphological analysis indicates that Bicentenaria shares many cranial features with other basal coelurosaurs as compsognathids, Ornitholestes, and tyrannosauroids. Otherwise, results of this analysis show that Bicentenaria exhibits a set of traits unique to this taxon. Furthermore, several pneumatic recesses were closely matched with those pneumatic features present in many derived coelurosaurs, particularly tyrannosauroids. This new information, together with future discoveries, will improve our knowledge about the muscular correlates of Bicentenaria and other coelurosaurs, and may shed light about the phylogenetic relationships of this group. Anat Rec, 2019. © 2019 American Association for Anatomy Anat Rec, 303:1884–1900, 2020. © 2019 American Association for Anatomy