bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst
Authors: Dong Hao , Yang Hongyuan , Du Qingzhou , Zhang Tengfei , Liu Qing 
Published: January 2019

AbstractAmino‐group functionalized FDU‐12 material (FDU‐12‐NH2) was utilized as an efficient and recyclable catalyst for the Knoevenagel condensation to afford α, β‐unsaturated compounds. The catalysts were characterized by nitrogen adsorption, X‐ray diffraction, Fourier transform infrared spectrophotometer, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis, which showed that FDU‐12‐NH2 was successfully prepared using the post‐synthesis‐grafting method. Compared with the magnetic stirring method, the ultrasound‐assisted method could improve the Knoevenagel reaction significantly in this work. In addition, the catalyst exhibited the highest catalytic activity in the mixed solvent of ethanol and water with volume ratio of 3 : 1 due to the solvent effect. Various substrates could convert to their desired products with high yields in short time; what's more, it could be used for four times without significant decrease of the activity. This work reveals that FDU‐12‐NH2 is a promising heterogeneous catalyst for the synthesis of α, β‐unsaturated compounds.
Scandium(III) Trifluoromethanesulfonate Catalyzed Reactions of Donor‐Acceptor Cyclopropanes with 1,1‐Diarylethylenes
Authors: He Yuchen , Zhu Xiaoyan , Hu Chen , Hong Gang , Wang Limin 
Published: January 2019

AbstractA Lewis acid‐promoted D−A cyclopropane reacting with 1,1‐diarylethylenes was developed. This reaction features mild reaction conditions, easy availability of starting materials, good functional group tolerance and high yields (up to 91%). Moreover, substituent effects on product distribution were observed. The scenario of the reaction pathway was supposed to involve the Sc(OTf)3‐mediated ring‐opening 1,3‐dipole intermediate followed by the attack of 1,1‐diarylethylenes.
Phase Transitions, Crystal Structures, and Magnetic Properties of Ferrocenium Ionic Plastic Crystals with CF3BF3 and Other Anions
Authors: Kimata Hironori , Sakurai Takahiro , Ohta Hitoshi , Mochida Tomoyuki 
Published: January 2019

AbstractSalts of cationic sandwich complexes often exhibit an ionic plastic phase; however, only a few exhibit a plastic phase at room temperature. To explore the use of the CF3BF3 anion to lower the transition temperature to the plastic phase, we prepared salts of CF3BF3 with various ferrocene derivatives, [D][CF3BF3] (D=FeCp*2, Fe(C5Me4H)2, Fe(C5H4Me)2, FeCp(C5H4Me), FeCp2; Cp*=C5Me5, Cp=C5H5). Although [FeCp*2][CF3BF3] exhibited a plastic phase above 417 K, the other salts formed room‐temperature ionic plastic crystals with a phase transition to the plastic phase in the range 266–291 K. The crystal structure and thermal properties of [FeCp2][OTf] were elucidated for comparison. In addition, decamethylferrocenium salts with other anions were synthesized and structurally characterized: [FeCp*2][X] (X=N(SO2F)2 and B(CN)4) exhibited a phase transition to the plastic phase above 400 K, whereas carborane‐containing salts [FeCp*2]2[B12F12] and [FeCp*2][Co(C2B9H11)2] did not exhibit a plastic phase.
MG53 Inhibits the Progression of Tongue Cancer Cells through Regulating PI3K‐AKT Signaling Pathway: Evidence from 3D Cell Culture and Animal Model
Authors: Yin Wei , Liu Yaoli , Bian Zhuan 
Published: January 2019

AbstractMG53 is transcriptionally activated by the IRS‐1/PI3K/AKT signal pathway, which is closely related with oncogenesis of several tumors. Here, the role of MG53 in the tumorigenesis of tongue cancer is analyzed in vitro and in vivo. The stable MG53 overexpression/knockdown SCC9 and SCC25 cells are constructed through retrovirus infection. Then a PLGA cylinder is used to provide a 3D culture environment for cell growth. Cell counting results suggest that overexpression of MG53 inhibits the cell proliferation and colony formation of SCC9 and SCC25 cells. While knockdown of MG53 has the opposite effect. Furthermore, knockdown of MG53 significantly promotes the invasion of SCC9 and SCC25 cells. Western blotting data confirm that MG53 affects the expression of the AKT signaling pathway. In a xenograft assay, knockdown of MG53 promotes the growth of xenograft which is induced by SCC25 cells in nude mice. The findings demonstrate that MG53 affects the biological behavior of human tongue cancer SCC9 and SCC25 cells.
Effects of tuned mass damper on correlation of wind‐induced responses and combination coefficients of equivalent static wind loads of high‐rise buildings
Authors: Wang Qinhua , Li Ziyi , Garg Ankit , Hazra Budhaditya , Xie Zhuangning 
Published: January 2019

SummaryTuned mass dampers (TMDs) are employed to control the wind‐induced responses of tall buildings. In the meantime, TMD may have an impact on the correlation of wind‐induced responses and combination coefficients of equivalent static wind loads (ESWLs). First, the mass matrix and stiffness matrix were extracted in this paper in accordance with the structural analysis model of two high‐rise buildings, and on that basis, the wind‐induced vibration responses analysis model with and without TMD was established. Second, the synchronous multipoint wind tunnel test to measure the pressure was performed for two high‐rise buildings, and the time history of wind‐induced vibration responses with and without TMD was studied. Finally, the impact of TMD on the correlation of wind‐induced responses and combination coefficients of ESWLs was discussed. The results of two examples suggest that after the installation of TMD, the increase of ρxy was 2.1% to 35.0% and ρyz was 2.8% to 45.6% at all wind directions for Building 1, and the increase of ρxy was 3.9% to 17.1% and ρyz was 6.8% to 38.3% for Building 2. The combination coefficients of ESWLs of two buildings were 3% to 6% larger than that of the original structure. The conclusion of this paper can be referenced by the wind resistant design of high‐rise buildings with TMD.
Combined Theoretical and Experimental Studies of Sodium Battery Materials
Authors: Watanabe Eriko , Chung Sai‐Cheong , Nishimura Shin‐ichi , Yamada Yuki , Okubo Masashi , Sodeyama Keitaro , Tateyama Yoshitaka , Yamada Atsuo 
Published: January 2019

AbstractOwing to developments in theoretical chemistry and computer power, the combination of calculations and experiments is now standard practice in understanding and developing new materials for battery systems. Here, we briefly review our recent combined studies based on density functional theory and molecular dynamics calculations for electrode and electrolyte materials for sodium‐ion batteries. These findings represent case studies of successful combinations of experimental and theoretical methods.
Effect of intra‐amniotic fluid pressure from polyhydramnios on cervical length in patients with twin–twin transfusion syndrome undergoing fetoscopic laser surgery
Authors: Bergh E. P. , Mann L. K. , Jain R. R. , Donepudi R. , Moise K. J. , Johnson A. , Papanna R. 
Published: January 2019

ABSTRACTObjectivesTo determine the relationship between intra‐amniotic pressure and cervical length (CL) in patients with twin–twin transfusion syndrome (TTTS) undergoing fetoscopic laser photocoagulation (FLP), and to identify pre‐ or intraoperative factors associated with increased intra‐amniotic pressure in this population.MethodsThis was a prospective cohort study of patients undergoing FLP for TTTS. Exclusion criteria were triplet or higher‐order gestation and prior cervical cerclage, amnioreduction or FLP procedure. CL was assessed using preprocedure transvaginal ultrasound. Intra‐amniotic pressure measurements were obtained on initial placement of the trocar into the amniotic cavity, using a direct hydrostatic pressure gauge. The relationship between intra‐amniotic pressure and CL was assessed using multivariate linear regression analysis, including relevant preoperative and intraoperative variables.ResultsIn total, 283 pregnancies met the inclusion criteria. Quintero stage of TTTS was I in 33 pregnancies, II in 88, III in 150 and IV in 12. Mean gestational age (GA) at FLP was 20.7 ± 3 weeks. Mean intra‐amniotic pressure was 23.1 ± 9 mmHg. On unadjusted linear regression analysis, there was no significant association between intra‐amniotic pressure and preoperative CL (P = 0.24) or GA at delivery (P = 0.22). On multivariate analysis, the factors associated significantly with intra‐amniotic pressure were: number of prior term deliveries (P = 0.03), recipient maximum vertical pocket (P < 0.0001), Quintero stage IV (P = 0.01) and type of anesthesia (sedation vs general anesthesia; P = 0.01).ConclusionIn pregnancies with TTTS, intra‐amniotic pressure is not associated with CL or GA at delivery. This novel finding suggests that cervical shortening in this population is not mechanically driven. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
Circular membrane with a centrally‐located opening ‐ analytical model using parameterisation of the non‐empty torus
Authors: Waszczuk‐Młyńska Aleksandra , Radkowski Stanisław 
Published: January 2019

AbstractThis paper discusses a model of the circular membrane using the second order basic partial differential equation. The aim of this work is to present a new analytical model of a membrane with an opening in its central part (damage‐simulating opening). Parametrisation applied in the model is based on the parametrisation of the torus with one difference, i.e. the radius r defining the torus's circle is not a constant quantity , but it varies within the range , where r0 is a maximal radius of the circle defining the torus. In order to build a model of a damaged membrane, only one surface of a non‐empty torus is needed, that is a surface created by the torus's circle rotation. A new partial differential equation is computed by means of the Fourier method of separation of variables, and next, by applying the Bessel substitution. The correctness of the analytical model and the obtained data resulting from the model (in this case the natural frequency) were verified based on the experiment and the numerical model.
Stabilized-cycle strategy for a multi-item, capacitated, hierarchical production planning problem in rolling schedules
Authors: Meistering Malte , Stadtler Hartmut 
Published: January 2019

AbstractLittle research has been done on hierarchical production planning systems (HPPS) in the context of rolling schedules with service-level constraints. Here, we adapt the stabilized-cycle strategy, which has initially been created for the master planning level (Meistering and Stadtler in Prod Oper Manag 26:2247–2265, 2017), to a two-level, multi-item, capacitated (short-medium-term) HPPS with demand uncertainty. For each planning level, we present extensions for mixed-integer programming models from literature (CLSP-L, PLSP) and introduce anticipation functions, as well as linking constraints. In a computational study, we analyze the performance of the HPPS with different rolling schedule strategies: the period-based, the order-based, and the stabilized-cycle strategy. It turns out that the stabilized-cycle strategy dominates the period-based strategy for all studied instances. For some instances, the stabilized-cycle strategy even dominates the order-based strategy; while in remaining instances, the stabilized-cycle strategy provides non-dominated solutions with a significant smaller downside deviation from service-level agreements and only a minor increase of costs.
Cascades in the dynamics of affine interval exchange transformations
Authors: BOULANGER ADRIEN , FOUGERON CHARLES , GHAZOUANI SELIM 
Published: January 2019

We describe in this article the dynamics of a one-parameter family of affine interval exchange transformations. This amounts to studying the directional foliations of a particular dilatation surface introduced in Duryev et al [Affine surfaces and their Veech groups. Preprint, 2016, arXiv:1609.02130], the Disco surface. We show that this family displays various dynamical behaviours: it is generically dynamically trivial but for a Cantor set of parameters the leaves of the foliations accumulate to a (transversely) Cantor set. This study is achieved through analysis of the dynamics of the Veech group of this surface combined with a modified version of Rauzy induction in the context of affine interval exchange transformations.
Effect of implementing school meals compared with packed lunches on quality of dietary intake among children aged 7–13 years
Authors: Sabinsky Marianne S. , Toft Ulla , Sommer Helle M. , Tetens Inge 
Published: January 2019

AbstractStrategies are needed to improve the dietary habits of children. The aim of the present study was to evaluate the effect of implementing a school food programme on the dietary quality of lunches consumed by school children aged 7–13 years compared with packed lunches brought from home. A secondary objective was to investigate if a possible effect would differ between the younger children and the older. A quasi-experimental study design with four intervention schools and four matched control schools was conducted. In total, 984 school children participated. Data on packed lunches were collected at baseline. At the 1st follow-up the children in the intervention schools were offered free school meals and at the 2nd follow-up children paid for their school meals. The control group had packed lunches at all measurements. A digital photographic method combined with a Meal Index of dietary Quality (Meal IQ) was used for dietary assessment. Multilevel modelling was employed for data analyses. The quality of dietary intake was improved when free school meals were offered (P = 0·004); if the school meals were paid for the use was limited and no difference in change in dietary quality was found (P = 0·343). The school food programme had no difference in effect according to age (P = 0·083). In conclusion, offering a free school meal had a positive effect on dietary quality of the lunches consumed by school children aged 7–13 years. No effect was measured when the school meals were not provided for free. The dietary effect did not depend on age.
Explicit Salem sets, Fourier restriction, and metric Diophantine approximation in thep-adic numbers
Authors: Fraser Robert , Hambrook Kyle 
Published: January 2019

AbstractWe exhibit the first explicit examples of Salem sets in ℚpof every dimension 0 < α < 1 by showing that certain sets of well-approximablep-adic numbers are Salem sets. We construct measures supported on these sets that satisfy essentially optimal Fourier decay and upper regularity conditions, and we observe that these conditions imply that the measures satisfy strong Fourier restriction inequalities. We also partially generalize our results to higher dimensions. Our results extend theorems of Kaufman, Papadimitropoulos, and Hambrook from the real to thep-adic setting.
Monotonicity of non-Liouville property for positive solutions of skew product elliptic equations
Authors: Murata Minoru , Tsuchida Tetsuo 
Published: January 2019

AbstractWe consider a second-order elliptic operatorLin skew product of an ordinary differential operatorL1on an interval (a,b) and an elliptic operator on a domainD2of a Riemannian manifold such that the associated heat kernel is intrinsically ultracontractive. We give criteria for criticality and subcriticality ofLin terms of a positive solution having minimal growth atη(η = a,b) to an associated ordinary differential equation. In the subcritical case, we explicitly determine the Martin compactification and Martin kernel forLon the basis of [24]; in particular, the Martin boundary overηis either one point or a compactification ofD2, which depends on whether an associated integral nearηdiverges or converges. From this structure theorem we show a monotonicity property that the Martin boundary overηdoes not become smaller as the potential term ofL1becomes larger nearη.
Random initial conditions for semi-linear PDEs
Authors: Blömker Dirk , Cannizzaro Giuseppe , Romito Marco 
Published: January 2019

AbstractWe analyse the effect of random initial conditions on the local well-posedness of semi-linear PDEs, to investigate to what extent recent ideas on singular stochastic PDEs can prove useful in this framework.In particular, in some cases, stochastic initial conditions extend the validity of the fixed-point argument to larger spaces than deterministic initial conditions would allow, but in general, it is never possible to go beyond the threshold that is predicted by critical scaling, as in our general class of equations we are not exploiting any special structure present in the equation.We also give a specific example where the level of regularity for the fixed-point argument reached by random initial conditions is not yet critical, but it is already sharp in the sense that we find infinitely many random initial conditions of slightly lower regularity, where there is no solution at all. Thus criticality cannot be reached even by random initial conditions.The existence and uniqueness in a critical space is always delicate, but we can consider the Burgers equation in logarithmically sub-critical spaces, where existence and uniqueness hold, and again random initial conditions allow to extend the validity to spaces of lower regularity which are still logarithmically sub-critical.
THE GENERATING GRAPH OF INFINITE ABELIAN GROUPS
Authors: ACCIARRI CRISTINA , LUCCHINI ANDREA 
Published: January 2019

For a group $G$, let $\unicode[STIX]{x1D6E4}(G)$ denote the graph defined on the elements of $G$ in such a way that two distinct vertices are connected by an edge if and only if they generate $G$. Let $\unicode[STIX]{x1D6E4}^{\ast }(G)$ be the subgraph of $\unicode[STIX]{x1D6E4}(G)$ that is induced by all the vertices of $\unicode[STIX]{x1D6E4}(G)$ that are not isolated. We prove that if $G$ is a 2-generated noncyclic abelian group, then $\unicode[STIX]{x1D6E4}^{\ast }(G)$ is connected. Moreover, $\text{diam}(\unicode[STIX]{x1D6E4}^{\ast }(G))=2$ if the torsion subgroup of $G$ is nontrivial and $\text{diam}(\unicode[STIX]{x1D6E4}^{\ast }(G))=\infty$ otherwise. If $F$ is the free group of rank 2, then $\unicode[STIX]{x1D6E4}^{\ast }(F)$ is connected and we deduce from $\text{diam}(\unicode[STIX]{x1D6E4}^{\ast }(\mathbb{Z}\times \mathbb{Z}))=\infty$ that $\text{diam}(\unicode[STIX]{x1D6E4}^{\ast }(F))=\infty$.
Charles Darwin and the scientific mind
Authors: STACK DAVID 
Published: January 2019

AbstractAlthough often presented as an essential, ahistorical or innate psychological entity, the notion of a ‘scientific mind’ is ripe for historical analysis. The growing historical interest in the self-fashioning of masculine identities, and more particularly the self-fashioning of the nineteenth-century scientist, has opened up a space in which to probe what was understood by someone being said to possess a ‘scientific mind’. This task is made all the more urgent by the recently revived interest of some psychologists in the concept and the highly gendered and culturally conditioned understanding of the scientific mind displayed in some contemporary debates. This article contributes to that task, and fills a rare gap in Darwin studies by making the first detailed exploration of Charles Darwin's understanding of the scientific mind, as revealed in the psychological self-analysis he undertook in his ‘Recollections of the development of my mind and character’ (1876), and supplemented in hisLife of Erasmus Darwin(1879). Drawing upon a broad range of Darwin's published and unpublished works, this article argues that Darwin's understanding of the scientific mind was rooted in his earliest notebooks, and was far more central to his thought than is usually acknowledged. The article further delineates the differences between Darwin's understanding and that of his half-cousin Francis Galton, situates his understanding in relation to his reading of William Whewell and Auguste Comte, and considers what Darwin's view of the scientific mind tells us about his perspective on questions of religion and gender. Throughout, the article seeks to show that the ‘scientific mind’ is always an agglomeration of historically specific prejudices and presumptions, and concludes that this study of Darwin points to the need for a similarly historical approach to the question of the scientific mind today.
ON NONLOCAL NONLINEAR ELLIPTIC PROBLEMS WITH THE FRACTIONAL LAPLACIAN
Authors: MA LI 
Published: January 2019

AbstractIn this paper, we study the existence of positive solutions to a semilinear nonlocal elliptic problem with the fractional α-Laplacian on Rn, 0 < α < n. We show that the problem has infinitely many positive solutions in $ {C^\tau}({R^n})\bigcap H_{loc}^{\alpha /2}({R^n}) $. Moreover, each of these solutions tends to some positive constant limit at infinity. We can extend our previous result about sub-elliptic problem to the nonlocal problem on Rn. We also show for α ∊ (0, 2) that in some cases, by the use of Hardy’s inequality, there is a nontrivial non-negative $ H_{loc}^{\alpha /2}({R^n}) $ weak solution to the problem
$$ {( - \Delta )^{\alpha /2}}u(x) = K(x){u^p} \quad {\rm{ in}} \ {R^n}, $$
where K(x) = K(|x|) is a non-negative non-increasing continuous radial function in Rn and p > 1.
High accuracy measurement of gravitational wave back-reaction in the OJ287 black hole binary
Authors: Valtonen Mauri J. , Dey L. , Hudec R. , Zola S. , Gopakumar A. , Mikkola S. , Ciprini S. , Matsumoto K. , Sadakane K. , Kidger M. , Gazeas K. , Nilsson K. , Berdyugin A. , Piirola V. , Jermak H. , Baliyan K.S. , Reichart D. E. , Caton D. B. , Haque S. ,   the OJ287-15/16 Collaboration
Published: January 2019

AbstractBlazar OJ287 exhibits large thermal flares at least twice every 12 years. The times of these flares have been predicted successfully using the model of a quasi-Keplerian eccentric black hole binary where the secondary impacts the accretion disk of the primary, creating the thermal flares. New measurements of the historical light curve have been combined with the observations of the 2015 November/December flare to identify the impact record since year 1886, and to constrain the orbit of the binary. The orbital solution shows that the binary period, now 12.062 years, is decreasing at the rate of 36 days per century. This corresponds to an energy loss to gravitational waves that is 6.5 ± 4 % less than the rate predicted by the standard quadrupolar gravitational wave (GW) emission. We show that the difference is due to higher order gravitational radiation reaction terms that include the dominant order tail contributions.