bluuebunny/crossref_metadata_2025 huggingface dataset:
An infinitary encoding of temporal equilibrium logic
Authors: CABALAR PEDRO , DIÉGUEZ MARTÍN , VIDAL CONCEPCIÓN
Published: September 2015

This paper studies the relation between two recent extensions of propositional Equilibrium Logic, a well-known logical characterisation of Answer Set Programming. In particular, we show how Temporal Equilibrium Logic, which introduces modal operators as those typically handled in Linear-Time Temporal Logic (LTL), can be encoded into Infinitary Equilibrium Logic, a recent formalisation that allows the use of infinite conjunctions and disjunctions. We prove the correctness of this encoding and, as an application, we further use it to show that the semantics of the temporal logic programming formalism called TEMPLOG is subsumed by Temporal Equilibrium Logic.
Taming primary key violations to query large inconsistent data via ASP
Authors: MANNA MARCO , RICCA FRANCESCO , TERRACINA GIORGIO
Published: September 2015

Consistent query answering over a database that violates primary key constraints is a classical hard problem in database research that has been traditionally dealt with logic programming. However, the applicability of existing logic-based solutions is restricted to data sets of moderate size. This paper presents a novel decomposition and pruning strategy that reduces, in polynomial time, the problem of computing the consistent answer to a conjunctive query over a database subject to primary key constraints to a collection of smaller problems of the same sort that can be solved independently. The new strategy is naturally modeled and implemented using Answer Set Programming (ASP). An experiment run on benchmarks from the database world prove the effectiveness and efficiency of our ASP-based approach also on large data sets.
Design development and experimental validation of an EBG matrix antenna for tracking application
Authors: Taam Hussein Abou , Zakka El Nashef Georges , Arnaud Eric , Chevalier Nicolas , Lenoir Bertrand , Jecko Bernard , Rammal Mohamed
Published: September 2015

Today's increase of functions, improvement of performances, and cost reductions required on an agile electronically scanned antenna, drive researchers to develop an innovative antennas’ concept in order to deal with the proposed challenge. In this context, this article describes and demonstrates an experimental prototype to show the reliability and efficiency of the electromagnetic band gap(EBG)matrix antenna theoretical aspect, for beam forming and beam steering applications. The originality of this work is the antenna itself which constitutes the subject of an accepted national and international patent. In fact, the proposed antenna is based on the equivalent radiating surface approach and used special EBG antennas called “pixels” to overcome some of the array approach defects. The antenna has demonstrated different electromagnetic behaviors, such as low mutual coupling, high gain preservation for high scanning angles values, etc.
Synergistic activation of human pregnane X receptor by binary cocktails of pharmaceutical and environmental compounds
Authors: Delfosse Vanessa , Dendele Béatrice , Huet Tiphaine , Grimaldi Marina , Boulahtouf Abdelhay , Gerbal-Chaloin Sabine , Beucher Bertrand , Roecklin Dominique , Muller Christina , Rahmani Roger , Cavaillès Vincent , Daujat-Chavanieu Martine , Vivat Valérie , Pascussi Jean-Marc , Balaguer Patrick , Bourguet William
Published: September 2015

Humans are chronically exposed to multiple exogenous substances, including environmental pollutants, drugs and dietary components. Many of these compounds are suspected to impact human health, and their combination in complex mixtures could exacerbate their harmful effects. Here we demonstrate that a pharmaceutical oestrogen and a persistent organochlorine pesticide, both exhibiting low efficacy when studied separately, cooperatively bind to the pregnane X receptor, leading to synergistic activation. Biophysical analysis shows that each ligand enhances the binding affinity of the other, so the binary mixture induces a substantial biological response at doses at which each chemical individually is inactive. High-resolution crystal structures reveal the structural basis for the observed cooperativity. Our results suggest that the formation of ‘supramolecular ligands’ within the ligand-binding pocket of nuclear receptors contributes to the synergistic toxic effect of chemical mixtures, which may have broad implications for the fields of endocrine disruption, toxicology and chemical risk assessment.
Atomic basis for therapeutic activation of neuronal potassium channels
Authors: Kim Robin Y. , Yau Michael C. , Galpin Jason D. , Seebohm Guiscard , Ahern Christopher A. , Pless Stephan A. , Kurata Harley T.
Published: September 2015

Retigabine is a recently approved anticonvulsant that acts by potentiating neuronal M-current generated by KCNQ2–5 channels, interacting with a conserved Trp residue in the channel pore domain. Using unnatural amino-acid mutagenesis, we subtly altered the properties of this Trp to reveal specific chemical interactions required for retigabine action. Introduction of a non-natural isosteric H-bond-deficient Trp analogue abolishes channel potentiation, indicating that retigabine effects rely strongly on formation of a H-bond with the conserved pore Trp. Supporting this model, substitution with fluorinated Trp analogues, with increased H-bonding propensity, strengthens retigabine potency. In addition, potency of numerous retigabine analogues correlates with the negative electrostatic surface potential of a carbonyl/carbamate oxygen atom present in most KCNQ activators. These findings functionally pinpoint an atomic-scale interaction essential for effects of retigabine and provide stringent constraints that may guide rational improvement of the emerging drug class of KCNQ channel activators.
Unravelling the origin of the giant Zn deficiency in wurtzite type ZnO nanoparticles
Authors: Renaud Adèle , Cario Laurent , Rocquefelte Xavier , Deniard Philippe , Gautron Eric , Faulques Eric , Das Tilak , Cheviré François , Tessier Franck , Jobic Stéphane
Published: September 2015

Owing to its high technological importance for optoelectronics, zinc oxide received much attention. In particular, the role of defects on its physical properties has been extensively studied as well as their thermodynamical stability. In particular, a large concentration of Zn vacancies in ZnO bulk materials is so far considered highly unstable. Here we report that the thermal decomposition of zinc peroxide produces wurtzite-type ZnO nanoparticles with an extraordinary large amount of zinc vacancies (>15%). These Zn vacancies segregate at the surface of the nanoparticles, as confirmed by ab initio calculations, to form a pseudo core-shell structure made of a dense ZnO sphere coated by a Zn free oxo-hydroxide mono layer. In others terms, oxygen terminated surfaces are privileged over zinc-terminated surfaces for passivation reasons what accounts for the Zn off-stoichiometry observed in ultra-fine powdered samples. Such Zn-deficient Zn1-xO nanoparticles exhibit an unprecedented photoluminescence signature suggesting that the core-shell-like edifice drastically influences the electronic structure of ZnO. This nanostructuration could be at the origin of the recent stabilisation of p-type charge carriers in nitrogen-doped ZnO nanoparticles.
Quantifying Molecular-Level Cell Adhesion on Electroactive Conducting Polymers using Electrochemical-Single Cell Force Spectroscopy
Authors: Zhang Hongrui , Molino Paul J. , Wallace Gordon G. , Higgins Michael J.
Published: September 2015

Single Cell Force Spectroscopy was combined with Electrochemical-AFM to quantify the adhesion between live single cells and conducting polymers whilst simultaneously applying a voltage to electrically switch the polymer from oxidized to reduced states. The cell-conducting polymer adhesion represents the non-specific interaction between cell surface glycocalyx molecules and polymer groups such as sulfonate and dodecylbenzene groups, which rearrange their orientation during electrical switching. Single cell adhesion significantly increases as the polymer is switched from an oxidized to fully reduced state, indicating stronger cell binding to sulfonate groups as opposed to hydrophobic groups. This increase in single cell adhesion is concomitant with an increase in surface hydrophilicity and uptake of cell media, driven by cation movement, into the polymer film during electrochemical reduction. Binding forces between the glycocalyx and polymer surface are indicative of molecular-level interactions and during electrical stimulation there is a decrease in both the binding force and stiffness of the adhesive bonds. The study provides insight into the effects of electrochemical switching on cell adhesion at the cell-conducting polymer interface and is more broadly applicable to elucidating the binding of cell adhesion molecules in the presence of electrical fields and directly at electrode interfaces.
Competition with wind-pollinated plant species alters floral traits of insect-pollinated plant species
Authors: Flacher Floriane , Raynaud Xavier , Hansart Amandine , Motard Eric , Dajoz Isabelle
Published: September 2015

Plant traits related to attractiveness to pollinators (e.g. flowers and nectar) can be sensitive to abiotic or biotic conditions. Soil nutrient availability, as well as interactions among insect-pollinated plants species, can induce changes in flower and nectar production. However, further investigations are needed to determine the impact of interactions between insect-pollinated species and abiotically pollinated species on such floral traits, especially floral rewards. We carried out a pot experiment in which three insect-pollinated plant species were grown in binary mixtures with four wind-pollinated plant species, differing in their competitive ability. Along the flowering period, we measured floral traits of the insect-pollinated species involved in attractiveness to pollinators (i.e. floral display size, flower size, daily and total 1) flower production, 2) nectar volume, 3) amount of sucrose allocated to nectar). Final plant biomass was measured to quantify competitive interactions. For two out of three insect-pollinated species, we found that the presence of a wind-pollinated species can negatively impact floral traits involved in attractiveness to pollinators. This effect was stronger with wind-pollinated species that induced stronger competitive interactions. These results stress the importance of studying the whole plant community (and not just the insect-pollinated plant community) when working on plant-pollinator interactions.
Traumatic brain injury results in rapid pericyte loss followed by reactive pericytosis in the cerebral cortex
Authors: Zehendner Christoph M. , Sebastiani Anne , Hugonnet André , Bischoff Florian , Luhmann Heiko J. , Thal Serge C.
Published: September 2015

Accumulating evidence suggests a pivotal role of PDGFRß positive cells, a specific marker for central nervous system (CNS) pericytes, in tissue scarring. Identification of cells that contribute to tissue reorganization in the CNS upon injury is a crucial step to develop novel treatment strategies in regenerative medicine. It has been shown that pericytes contribute to scar formation in the spinal cord. It is further known that ischemia initially triggers pericyte loss in vivo, whilst brain trauma is capable of inducing pericyte detachment from cerebral vessels. These data point towards a significant role of pericytes in CNS injury. The temporal and spatial dynamics of PDGFRß cells and their responses in traumatic brain injury are poorly understood. Here we show that PDGFRß positive cells initially decline in the acute phase following experimental traumatic brain injury. However, PDGFRß positive cells increase significantly in the trauma zone days after brain injury. Using various pericyte markers we identify these cells to be pericytes that are demarcated by reactive gliosis. Our data indicate that brain trauma causes a biphasic response of pericytes in the early phase of brain trauma that may be of relevance for the understanding of pathological cellular responses in traumatic brain injury.
Architecture of the Synaptophysin/Synaptobrevin Complex: Structural Evidence for an Entropic Clustering Function at the Synapse
Authors: Adams Daniel J. , Arthur Christopher P. , Stowell Michael H. B.
Published: September 2015

We have purified the mammalian synaptophysin/synaptobrevin (SYP/VAMP2) complex to homogeneity in the presence of cholesterol and determined the 3D EM structure by single particle reconstruction. The structure reveals that SYP and VAMP2 assemble into a hexameric ring wherein 6 SYP molecules bind 6 VAMP2 dimers. Using the EM map as a constraint, a three dimensional atomic model was built and refined using known atomic structures and homology modeling. The overall architecture of the model suggests a simple mechanism to ensure cooperativity of synaptic vesicle fusion by organizing multiple VAMP2 molecules such that they are directionally oriented towards the target membrane. This is the first three dimensional architectural data for the SYP/VAMP2 complex and provides a structural foundation for understanding the role of this complex in synaptic transmission.
Evidence for equal size cell divisions during gametogenesis in a marine green alga Monostroma angicava
Authors: Togashi Tatsuya , Horinouchi Yusuke , Sasaki Hironobu , Yoshimura Jin
Published: September 2015

In cell divisions, relative size of daughter cells should play fundamental roles in gametogenesis and embryogenesis. Differences in gamete size between the two mating types underlie sexual selection. Size of daughter cells is a key factor to regulate cell divisions during cleavage. In cleavage, the form of cell divisions (equal/unequal in size) determines the developmental fate of each blastomere. However, strict validation of the form of cell divisions is rarely demonstrated. We cannot distinguish between equal and unequal cell divisions by analysing only the mean size of daughter cells, because their means can be the same. In contrast, the dispersion of daughter cell size depends on the forms of cell divisions. Based on this, we show that gametogenesis in the marine green alga, Monostroma angicava, exhibits equal size cell divisions. The variance and the mean of gamete size (volume) of each mating type measured agree closely with the prediction from synchronized equal size cell divisions. Gamete size actually takes only discrete values here. This is a key theoretical assumption made to explain the diversified evolution of isogamy and anisogamy in marine green algae. Our results suggest that germ cells adopt equal size cell divisions during gametogenesis.
Laser optomechanics
Authors: Yang Weijian , Gerke Stephen Adair , Ng Kar Wei , Rao Yi , Chase Christopher , Chang-Hasnain Connie J.
Published: September 2015

Cavity optomechanics explores the interaction between optical field and mechanical motion. So far, this interaction has relied on the detuning between a passive optical resonator and an external pump laser. Here, we report a new scheme with mutual coupling between a mechanical oscillator supporting the mirror of a laser and the optical field generated by the laser itself. The optically active cavity greatly enhances the light-matter energy transfer. In this work, we use an electrically-pumped vertical-cavity surface-emitting laser (VCSEL) with an ultra-light-weight (130 pg) high-contrast-grating (HCG) mirror, whose reflectivity spectrum is designed to facilitate strong optomechanical coupling, to demonstrate optomechanically-induced regenerative oscillation of the laser optomechanical cavity. We observe >550 nm self-oscillation amplitude of the micromechanical oscillator, two to three orders of magnitude larger than typical and correspondingly a 23 nm laser wavelength sweep. In addition to its immediate applications as a high-speed wavelength-swept source, this scheme also offers a new approach for integrated on-chip sensors.
Virus based Full Colour Pixels using a Microheater
Authors: Kim Won-Geun , Kim Kyujung , Ha Sung-Hun , Song Hyerin , Yu Hyun-Woo , Kim Chuntae , Kim Jong-Man , Oh Jin-Woo
Published: September 2015

Mimicking natural structures has been received considerable attentions and there have been a few practical advances. Tremendous efforts based on a self-assembly technique have been contributed to the development of the novel photonic structures which are mimicking nature’s inventions. We emulate the photonic structures from an origin of colour generation of mammalian skins and avian skin/feathers using M13 phage. The structures can be generated a full range of RGB colours that can be sensitively switched by temperature and substrate materials. Consequently, we developed an M13 phage-based temperature-dependent actively controllable colour pixels platform on a microheater chip. Given the simplicity of the fabrication process, the low voltage requirements and cycling stability, the virus colour pixels enable us to substitute for conventional colour pixels for the development of various implantable, wearable and flexible devices in future.
Droplet Digital Enzyme-Linked Oligonucleotide Hybridization Assay for Absolute RNA Quantification
Authors: Guan Weihua , Chen Liben , Rane Tushar D. , Wang Tza-Huei
Published: September 2015

We present a continuous-flow droplet-based digital Enzyme-Linked Oligonucleotide Hybridization Assay (droplet digital ELOHA) for sensitive detection and absolute quantification of RNA molecules. Droplet digital ELOHA incorporates direct hybridization and single enzyme reaction via the formation of single probe-RNA-probe (enzyme) complex on magnetic beads. It enables RNA detection without reverse transcription and PCR amplification processes. The magnetic beads are subsequently encapsulated into a large number of picoliter-sized droplets with enzyme substrates in a continuous-flow device. This device is capable of generating droplets at high-throughput. It also integrates in-line enzymatic incubation and detection of fluorescent products. Our droplet digital ELOHA is able to accurately quantify (differentiate 40% difference) as few as ~600 RNA molecules in a 1 mL sample (equivalent to 1 aM or lower) without molecular replication. The absolute quantification ability of droplet digital ELOHA is demonstrated with the analysis of clinical Neisseria gonorrhoeae 16S rRNA to show its potential value in real complex samples.
Molecular Evolution of the Capsid Gene in Norovirus Genogroup I
Authors: Kobayashi Miho , Yoshizumi Shima , Kogawa Sayaka , Takahashi Tomoko , Ueki Yo , Shinohara Michiyo , Mizukoshi Fuminori , Tsukagoshi Hiroyuki , Sasaki Yoshiko , Suzuki Rieko , Shimizu Hideaki , Iwakiri Akira , Okabe Nobuhiko , Shirabe Komei , Shinomiya Hiroto , Kozawa Kunihisa , Kusunoki Hideki , Ryo Akihide , Kuroda Makoto , Katayama Kazuhiko , Kimura Hirokazu
Published: September 2015

We studied the molecular evolution of the capsid gene in all genotypes (genotypes 1–9) of human norovirus (NoV) genogroup I. The evolutionary time scale and rate were estimated by the Bayesian Markov chain Monte Carlo (MCMC) method. We also performed selective pressure analysis and B-cell linear epitope prediction in the deduced NoV GI capsid protein. Furthermore, we analysed the effective population size of the virus using Bayesian skyline plot (BSP) analysis. A phylogenetic tree by MCMC showed that NoV GI diverged from the common ancestor of NoV GII, GIII and GIV approximately 2,800 years ago with rapid evolution (about 10−3 substitutions/site/year). Some positive selection sites and over 400 negative selection sites were estimated in the deduced capsid protein. Many epitopes were estimated in the deduced virus capsid proteins. An epitope of GI.1 may be associated with histo-blood group antigen binding sites (Ser377, Pro378 and Ser380). Moreover, BSP suggested that the adaptation of NoV GI strains to humans was affected by natural selection. The results suggested that NoV GI strains evolved rapidly and date back to many years ago. Additionally, the virus may have undergone locally affected natural selection in the host resulting in its adaptation to humans.
Sensing applications of luminescent carbon based dots
Authors: Dong Yongqiang , Cai Jianhua , You Xu , Chi Yuwu
Published: September 2015

Carbon based dots (CDs) including carbon quantum dots and graphene quantum dots exhibit unique luminescence properties, such as photoluminescence (PL), chemiluminescence (CL) and electrochemiluminescence (ECL).
A direct catalytic ring expansion approach to o-fluoronaphthols and o/p-fluorophenols from indanones and 2-cyclopentenones
Authors: Chang Jian , Song Xiaoning , Huang Wanqiao , Zhu Dongsheng , Wang Mang
Published: September 2015

A catalytic ring expansion of indanones to o-fluoronaphthols is described by taking advantage of the multi-reactivities of TMSCF2Br.
Amorphous V2O5–P2O5 as high-voltage cathodes for magnesium batteries
Authors: Arthur Timothy S. , Kato Keiko , Germain Jason , Guo Jinghua , Glans Per-Anders , Liu Yi-Sheng , Holmes Daniel , Fan Xudong , Mizuno Fuminori
Published: September 2015

A deep investigation of amorphous V2O5–P2O5 powders for magnesium batteries communicates the vital properties to achieving the superior electrochemical performance at a 75 : 25 V2O5 : P2O5 molar ratio.
Recent progress of abrasion-resistant materials: learning from nature
Authors: Meng Jingxin , Zhang Pengchao , Wang Shutao
Published: September 2015

Recent investigations into natural abrasion-resistant materials to explore their general design principles, and the fabrication of bio-inspired abrasion-resistant materials are reviewed.
Non-redox metal ions can promote Wacker-type oxidations even better than copper(ii): a new opportunity in catalyst design
Authors: Qin Shuhao , Dong Lei , Chen Zhuqi , Zhang Sicheng , Yin Guochuan
Published: September 2015

Non-redox metal ions can accelerate Pd(ii)-catalyzed Wacker-type oxidations better than Cu(ii), revealing a new role of Cu(ii) in the Wacker-type mechanism.
Reversing aggregation: direct synthesis of nanocatalysts from bulk metal. Cellulose nanocrystals as active support to access efficient hydrogenation silver nanocatalysts
Authors: Kaushik Madhu , Li Alain You , Hudson Reuben , Masnadi Mitra , Li Chao-Jun , Moores Audrey
Published: September 2015

A highly atom-economical synthetic method to access nanocatalysts from bulk metal is described.
The first potent diphenyl phosphonate KLK4 inhibitors with unexpected binding kinetics
Authors: van Soom Jeroen , Cuzzucoli Crucitti Giuliana , Gladysz Rafaela , van der Veken Pieter , Di Santo Roberto , Stuyver Ingmar , Buck Victoria , Lambeir Anne-Marie , Magdolen Viktor , Joossens Jurgen , Augustyns Koen
Published: September 2015

We report the first highly potent and selective small-molecule KLK4 inhibitors, showing surprising reversible binding kinetics.
2-[18F]Fluoroethyl tosylate – a versatile tool for building18F-based radiotracers for positron emission tomography
Authors: Kniess Torsten , Laube Markus , Brust Peter , Steinbach Jörg
Published: September 2015

The review highlights the role of 2-[18F]fluoroethyltosylate ([18F]FETs) in PET radiotracer design since it is a preferred labeling reagent according to its high reactivity to phenolic, amine, thiophenolic and carboxylic functions.
Characterization of selective binding of biologically relevant inorganic ions with the proline zwitterion by 3D-RISM theory
Authors: Fedotova Marina V. , Dmitrieva Olga A.
Published: September 2015

The features of selective binding of several biologically relevant mono- and divalent inorganic ions with the proline zwitterion were studied over a wide range of electrolyte concentrations.
Cyano-bridged coordination polymer gel as a precursor to a nanoporous In2O3–Co3O4 hybrid network for high-capacity and cycle-stable lithium storage
Authors: Zhang Weiyu , Zhang Jinjing , Zhang Meiling , Zhang Chenxing , Zhang Anping , Zhou Yiming , Tang Yawen , Wu Ping
Published: September 2015

A cyanogel-derived three-dimensional nanoporous In2O3–Co3O4 hybrid network as a high-capacity and long-life anode material for lithium-ion batteries.
One-pot preparation of boronic acid and PEG bi-functionalized silica particles for separation and purification of catecholamine from rat serum
Authors: Wang Yan , Sun Lei , Yu Bingqing , Li Shaotong , Zhong Shian
Published: September 2015

A novel boronate absorbent with the ability to resist protein adsorption was synthesized by a one step method.
Synthetic deoxynojirimycin derivatives bearing a thiolated, fluorinated or unsaturated N-alkyl chain: identification of potent α-glucosidase and trehalase inhibitors as well as F508del-CFTR correctors
Authors: Cendret V. , Legigan T. , Mingot A. , Thibaudeau S. , Adachi I. , Forcella M. , Parenti P. , Bertrand J. , Becq F. , Norez C. , Désiré J. , Kato A. , Blériot Y.
Published: September 2015

Synthetic DNJs bearing a thiolated, fluorinated or unsaturatedN-substituent exhibit trehalase inhibition or F508del-CFTR correction.
Synthesis and antimicrobial activity of binaphthyl-based, functionalized oxazole and thiazole peptidomimetics
Authors: Wales Steven M. , Hammer Katherine A. , Somphol Kittiya , Kemker Isabell , Schröder David C. , Tague Andrew J. , Brkic Zinka , King Amy M. , Lyras Dena , Riley Thomas V. , Bremner John B. , Keller Paul A. , Pyne Stephen G.
Published: September 2015

Thirty two new binaphthyl-based, oxazole and thiazole peptidomimetics were prepared, which showed antibacterial activity (MICs 1–16 μg mL−1) against both Gram positive and negative isolates.
Structure, stability, mechanical and electronic properties of Fe–P binary compounds by first-principles calculations
Authors: Wu Jing , Chong XiaoYu , Zhou Rong , Jiang YeHua , Feng Jing
Published: September 2015

The equilibrium crystal structures, stability, elastic properties, hardness and electronic structures of all the Fe–P binary compounds are investigated systematically by first principles calculations.
Systems pharmacology and molecular docking strategies prioritize natural molecules as cardioprotective agents
Authors: Manivannan Jeganathan , Silambarasan Thangarasu , Kadarkarairaj Rajendran , Raja Boobalan
Published: September 2015

Multidimensional prioritization of cardioprotective natural compounds.
Catalytic decomposition action of hollow CuFe2O4 nanospheres on RDX and FOX-7
Authors: Zhang Yu , Wei Taotao , Xu Kangzhen , Ren Zhaoyu , Xiao Libai , Song Jirong , Zhao Fengqi
Published: September 2015

Hollow CuFe2O4 nanospheres show high catalytic activity on the thermal decomposition of RDX and FOX-7.
Detection of pesticide residues on fruit surfaces using laser induced breakdown spectroscopy
Authors: Du Xiaofan , Dong Daming , Zhao Xiande , Jiao Leizi , Han Pengcheng , Lang Yun
Published: September 2015

The detection of chlorpyrifos residue on the surface of apples by laser induced breakdown spectroscopy (LIBS) was explored, establishing a new method for the fast detection of pesticide residues on fruit.
Preparation of β-cyclodextrin functionalized reduced graphene oxide: application for electrochemical determination of paracetamol
Authors: Fu Li , Lai Guosong , Yu Aimin
Published: September 2015

A sensitive electrochemical sensor of paracetamol was developed based on a β-CD/reduced graphene oxide modified electrode.
Size dependent magnetic hyperthermia of octahedral Fe3O4 nanoparticles
Authors: Lv Y. , Yang Y. , Fang J. , Zhang H. , Peng E. , Liu X. , Xiao W. , Ding J.
Published: September 2015

Octahedral Fe3O4 nanoparticles show a wide size range for high SAR values to be used as an excellent thermal seed for magnetic hyperthermia cancer treatment.
Cosolvent-free nanocasting synthesis of ordered mesoporous g-C3N4 and its remarkable photocatalytic activity for methyl orange degradation
Authors: Gao Xiaochun , Jiao Xuejiao , Zhang Lanchun , Zhu Wencai , Xu Xiaohong , Ma Houyi , Chen Ting
Published: September 2015

Ordered mesoporous g-C3N4, synthesized via a green cosolvent-free nanocasting route, exhibited remarkable photodegradation performance towards methyl orange with a degradation rate constant 30 times higher than that of bulk g-C3N4.
Photodegradation of Rhodamine B in α-FeOOH/oxalate under light irradiation
Authors: Chen Rufen , Zhang Xiaonian , Liu Hui , Song Xiuqin , Wei Yu
Published: September 2015

High- and low-crystalline goethite (α-FeOOH) were obtained, and low-crystalline α-FeOOH showed higher photocatalytic activity toward the photodegradation of RhB.
p-Nitrobenzenesulfonamides and their fluorescent dansylsulfonamides derived from N-alkylated o-(purine-methyl)anilines as novel antitumour agents
Authors: Morales Fátima , Conejo-García Ana , Ramírez Alberto , Morata Cynthia , Marchal Juan Antonio , Campos Joaquín M.
Published: September 2015

10 shows an IC50 = 134 nM (A-375). Its dansyl analogue is absorbed (P.O.) accumulating mainly in liver and kidney.
Enhancement of sinterability and mechanical properties of B4C ceramics using Ti3AlC2 as a sintering aid
Authors: Tan Y. Q. , Chen C. , Li F. Z. , Zhang H. B. , Zhang G. J. , Peng S. M.
Published: September 2015

Ti3AlC2 was chosen as a novel sintering aid to fabricate dense B4C ceramics with high mechanical properties.
Application of a H4SiMo12O40@SiO2 catalyst with a hollow core–shell structure to oxidative desulfurization
Authors: Zhang Xiaotian , Luo Guangqin , Zhu Mingyuan , Kang Lihua , Yu Feng , Dai Bin
Published: September 2015

Designing a catalyst with excellent recyclability to improve oxidative desulfurization continues to challenge many researchers.
A theranostic polycation containing trehalose and lanthanide chelate domains for siRNA delivery and monitoring
Authors: Xue Lian , Kelkar Sneha S. , Wang Xiaoling , Ma Jie , Madsen Louis A. , Reineke Theresa M.
Published: September 2015

A trehalose-based polycation that contains lanthanide-chelate domains has been examined as a theranostic vehicle for siRNA delivery.
A simple strategy to enhance electrical conductivity of nanotube-conjugate polymer composites via iodine-doping
Authors: Fan Lina , Xu Xuecheng
Published: September 2015

Only the conductivities of iodine-doped CNT–polymer composites containing heteroatoms show a sharp increase.
Comparison of the oxidative pyrolysis behaviors of black liquor solids, alkali lignin and enzymatic hydrolysis/mild acidolysis lignin
Authors: Cheng Hao , Wu Shubin , Li Xiaohong
Published: September 2015

The rough heating rate of the oxidative pyrolysis reaction can be measured, and it's about 720 °C min−1 at 600 °C.
A soft-template mediated approach for Au(0) formation on a heterosilica surface and synergism in the catalytic reduction of 4-nitrophenol
Authors: Mahamallik Prateeksha , Pal Anjali
Published: September 2015

The work describes nanogold formation within the surfactant bilayer formed on a silica surface and its synergism on the catalytic reduction of 4-NP.
Hydrogels that allow and facilitate bone repair, remodeling, and regeneration
Authors: Short Aaron R. , Koralla Deepthi , Deshmukh Ameya , Wissel Benjamin , Stocker Benjamin , Calhoun Mark , Dean David , Winter Jessica O.
Published: September 2015

Bone defects can originate from a variety of causes, including trauma, cancer, congenital deformity, and surgical reconstruction. Success of the current “gold standard” treatment (i.e., autologous bone grafts) is greatly influenced by insufficient or inappropriate bone stock.
“Cleaning” the surface of hydroxyapatite nanorods by a reaction-dissolution approach
Authors: Cao Binrui , Yang Mingying , Wang Lin , Xu Hong , Zhu Ye , Mao Chuanbin
Published: September 2015

A new facile reaction-dissolution approach to surfactant-free hydroxyapatite nanorods for the removal of cytotoxic molecules from the nanoparticle surface and the subsequent construction of a biomimetic osteogenesis-inducing bioscaffold.
Realization of the welding of individual TiO2 semiconductor nano-objects using a novel 1D Au80Sn20 nanosolder
Authors: Qu Ke , Zhang Hong , Lan Qianqian , Deng Xia , Ma Xinlong , Huang Yuanqing , Zhang Junwei , Ma Hongbin , Inkson Beverley J. , Xue Desheng , Peng Yong
Published: September 2015

Individual semiconductor TiO2 nanowires were successfully welded together using novel one-dimensional Au80Sn20 nanosolders in situ TEM and in situ SEM for the first time.
The observation of a conductivity threshold on the electrorheological effect of p-phenylenediamine oxidized with p-benzoquinone
Authors: Plachy Tomas , Sedlacik Michal , Pavlinek Vladimir , Stejskal Jaroslav
Published: September 2015

Preparation of 2,5-(di-p-PDA)-1,4-benzoquinone and the ER effect threshold of the silicone-oil suspensions.
Temperature dependent microwave absorption of ultrathin graphene composites
Authors: Cao Wen-Qiang , Wang Xi-Xi , Yuan Jie , Wang Wen-Zhong , Cao Mao-Sheng
Published: September 2015

Ultrathin graphene exhibits highly efficient microwave absorption at elevated temperatures, which is attributed to the cooperation of dipole polarization and hopping conductivity. The ultrathin graphene composites show different dependences on concentrations and temperature towards imaginary permittivity and microwave absorptions.
CISHA: The History and Development of the Chinese International Speech, Language and Hearing Association
Authors: Hao Grace , McCrea Elizabeth , McNeilly Lemmietta , Wang Rumi
Published: September 2015

This article introduces the reader to the development of the Chinese International Speech, Language and Hearing Association. It also provides an overview of the education models for speech language pathology professionals as well as information regarding the diverse needs and practice issues for the profession. The results of a survey completed by individuals practicing speech language pathology in China yield insight to perceived issues and needs for service delivery and practice parameters.
Low‐complexity transmit antenna selection for spatial modulation
Authors: Xiao Yue , Yin Lu , Wang Yu , Li Lei , Xiang Wei
Published: September 2015

A low‐complexity transmit antenna selection (TAS) scheme is proposed for spatial modulation systems to provide a better trade‐off between computational complexity and system performance. The proposed scheme can achieve a performance similar to the optimal TAS scheme in the low SNR region, but with much lower complexity compared with existing schemes in the literature.
Bandwidth enhancement for single‐feed circularly polarised microstrip antenna with epsilon‐negative transmission line‐based annular ring
Authors: Han Wangwang , Yang Feng , Long Rui , Zhou Longjian , Yan Fei
Published: September 2015

A novel low‐profile single‐feed circularly polarised (CP) microstrip antenna (MSA) loaded by a coplanar parasitic epsilon‐negative (ENG) transmission line (TL)‐based annular ring with enhanced bandwidth is proposed. By exciting the TM11 modes on both the driven patch and the coupled ENG TL‐based annular ring, two minimum axial‐ratio (AR) points are generated. It is the combination of the two minimum AR points that result in the bandwidth enhancement. An antenna prototype operating at the WLAN 5.2 GHz band is exemplified to validate the proposed concept. The measured results show that the proposed antenna with a low profile of 0.035λ0 obtains an overlapped bandwidth (return loss <−10 dB and AR < 3 dB) of 4%, which is 2.3 times wider than the conventional CP MSA. Moreover, the proposed antenna exhibits higher gain and lower backward radiation as compared with conventional CP MSAs.
Availability analysis of photovoltaic inverters in presence of uncertain data via Bayesian approach
Authors: Chiodo Elio , Lauria Davide , Pisani Cosimo
Published: September 2015

The study presents an advanced Bayesian technique to carry out availability analyses of photovoltaic inverters (PVI) in presence of uncertain reliability data. In order to take proper into account the above uncertainty, PVI hazard rate and repair rate are considered as random variables characterised by proper log‐normal and/or Gamma distributions. These assumptions are adequately motivated by well‐known and established physical and mathematical considerations. In this manner the photovoltaic availability uncertainty can be expressed as a function of the component uncertain data. Afterwards, thanks to the tailored Bayesian technique the authors demonstrate how, even in presence of scarce data, an efficient updating of the system performance can be accomplished during the PVI operating life. The methodology is really useful in view of an optimal allocation of the components’ reliabilities at the design stage and to establish the actual expected payback of the whole photovoltaic system. Extensive numerical simulations confirm the effectiveness and the validity of the developed Bayesian technique by also verifying its inherent robustness and efficiency through a rigorous analysis.
Low‐order controller design using remotely measured time delayed signals for stabilisation of equivalent power grid
Authors: Kishor Nand , Seppänen Janne M. , Turunen Jukka , Nikkilä Antti‐Juhani , Haarla Liisa C. , Purwar Shubhi
Published: September 2015

This study discusses the use of time‐delayed remote signals available through phasor measuring units (PMUs) for low‐order controller design in order to stabilise the power oscillations in the range of 0.3–0.42 Hz between two areas. In the proposed approach, first synchronisation measures are determined among the group of generators located in two areas. Then, an index that characterises the joint observability and controllability property in terms of Hankel singular values is defined as a criterion to preselect the remote feedback signal. Following this, a low‐order controller design based on minimisation of H∞ norm is considered. The measurement redundancy is taken into account in controller design using rotor angle, power flow or speed deviation as feedback signal from one of the generators. Additionally, if some specific PMU fails to provide measurements from a chosen generator, then controller effectiveness is guaranteed using signal from other generator in the same area. The performance of controller is verified considering single‐step and multi‐step disturbances applied to the reference voltage of exciter system. The comparison with design functions such as H2 norm, complex stability radius and spectral abscissa are also presented. The analytical results confirm using H∞ design algorithm provides better dynamic performance.
Information fusion from multiple cameras for gait‐based re‐identification and recognition
Authors: Chattopadhyay Pratik , Sural Shamik , Mukherjee Jayanta
Published: September 2015

In this study, the authors present a fully automated frontal (i.e. employing front and back views only) gait recognition approach using the depth information captured by multiple Kinect RGB‐D cameras. Limited depth sensing range restricts each of these Kinects to record only a part of a complete gait cycle of a walking subject. Hence, information from more than one Kinect is fused together to examine which features of a gait cycle can be conveniently extracted from the sequences captured independently by these cameras. To achieve this, it is imperative that the same subject be re‐identified as he moves from the field of view of one camera to another. The authors use a set of soft‐biometric features computed from the skeleton stream provided by Kinect software development kit) for doing automatic re‐identification. To enable such information fusion and also to handle missing components even after re‐identification, features are extracted at the granularity of small fractions of a gait cycle. Experiments carried out on a data set with gait videos captured by Kinects respectively from the back and front views show promising results.
Full wave analysis of the arbitrarily arranged spherical conformal microstrip antenna array
Authors: Yu Tao , Yin Chengyou , Liu Han
Published: September 2015

The surface integral equation is adopted to analyse the characteristics of the arbitrarily arranged spherical conformal microstrip antenna array based on the moment method. The Rao–Wilton–Glisson basis function and triangle function are used to simulate equivalent current on the patch and probe, respectively. A novel basis function at the junction of wire and surface is proposed to ensure continuity of the current from probe to patch. Then, the magnetic frill loop is used as excitation source in this study, and the field on the antenna surface generated by magnetic frill loop is deduced with the help of magnetic dyadic Green's functions on the surface of sphere. For the antenna array analysis, the characteristic basis function method combined with equivalent dipole method is employed to save the consumed memory and computation time. The characteristics of several pairs of conformal spherical microstrip antennas are presented and shown to be in good agreement with data from literatures and FEKO software. At last, a result comparison between the method in this study and FEKO software is drawn to show the efficiency of this method.
Gefährdungsbeurteilung psychischer Belastung: Expertenbasierte Entwicklung einer checklistbasierten Handlungshilfe für Betriebsärzte
Authors: Weigl M. , Müller A. , Angerer P. , Petru R.
Published: September 2015

Die praktische Umsetzung der gesetzlich vorgeschriebenen Gefährdungsbeurteilung psychischer Belastungen scheitert bislang häufig an der mangelnden Handlungskompetenz der Verantwortlichen. Es wird eine Checkliste zur effektiven Durchführung einer Gefährdungsbeurteilung psychischer Belastungen vorgestellt. Diese soll dem Betriebsarzt eine Handlungshilfe in der Vorbereitung, Planung und Durchführung einer Gefährdungsbeurteilung psychischer Belastungen (GB-Psych) sein. Auf Basis eines systematischen Entwicklungs- und Validierungsprozesses wurden mit N=15 arbeitsmedizinischen Experten spezifische Schritte und Erfolgsfaktoren für die erfolgreiche Durchführung einer GB-Psych qualitativ identifiziert. Dies geschah in einer 2-stufigen Delphi-Studie. Im folgenden Schritt wurden die maßgeblichen Schritte und Faktoren in eine Checkliste überführt. Anschließend wurde die Checkliste in einer Fokusgruppe von Betriebsmedizinern evaluiert (Anwenderevaluation). Zusätzlich wurde die Fassung einer Expertenevaluation unterzogen. Die Checkliste zur Durchführung der GB-Psych soll die Handlungskompetenzen des Betriebsarztes effektiv stärken – vor allem zur Implementation von Gefährdungsbeurteilungen in Klein- und Mittleren Unternehmen (KMU).
System optimization of a heat-switch-based electrocaloric heat pump
Authors: Smullin Sylvia J. , Wang Yunda , Schwartz David E.
Published: September 2015

Realization of the potential of electrocaloric heat pumps includes consideration of not only material properties but also device characteristics and cycle operation. We present detailed models and analysis that elucidate the key parameters for performance optimization. We show that the temperature lift, cooling power, and efficiency of a system driven by heat switches depend on system operating conditions and the combined thermal properties of both the heat switches and the electrocaloric capacitor. We show experimental results that validate the models and draw conclusions about building high-performance systems.
A maximally informative version of inelastic scattering of electromagnetic waves by Langmuir waves
Authors: Erofeev V. I.
Published: September 2015

The concept of informativeness of nonlinear plasma physics scenarios is explained. Natural ideas of developing highly informative models of plasma kinetics are spelled out. A maximally informative version of inelastic scattering of electromagnetic waves by Langmuir waves in a weakly turbulent inhomogeneous plasma is developed with consideration of possible changes in wave polarization. In addition, a new formula for wave drift in spatial positions and wave vectors is derived. New scenarios of the respective wave drift and inelastic scattering are compared with the previous visions. The results indicate the need for further revision of the traditional understanding of nonlinear plasma phenomena.
Radio-frequency small-signal model of hetero-gate-dielectric p-n-p-n tunneling field-effect transistor including charge conservation capacitance and substrate parameters
Authors: Marjani Saeid , Hosseini Seyed Ebrahim
Published: September 2015

This paper presents a radio-frequency (RF) small-signal model for the hetero-gate-dielectric p-n-p-n tunnel field-effect transistor (HG p-n-p-n TFET) that includes the charge conservation capacitance and the substrate parameters. The HG p-n-p-n TFET is evaluated in terms of various RF parameters, including the cut-off frequency, the maximum oscillation frequency, capacitances, resistances, conductances, and transport time delay. The extracted small-signal parameters and RF performance values are compared with those of the low-κ p-n-p-n TFET. A nonquasistatic RF small-signal model has been used along with SPICE simulations and small-signal parameters that were extracted from the simulated device Y-parameters to simulate the HG p-n-p-n TFET. It is confirmed using the Y-parameters and the extracted parameters that this model with the extracted charge conservation capacitance and substrate parameters is valid in the high frequency range up to 100 GHz. In addition, it is shown that a significant circuit performance error may be introduced if the charge conservation capacitance and the substrate parameters are not considered appropriately.
Quantitative magnetometry of ferromagnetic nanorods by microfluidic analytical magnetophoresis
Authors: Balk A. L. , Mair L. O. , Guo F. , Hangarter C. , Mathai P. P. , McMichael R. D. , Stavis S. M. , Unguris J.
Published: September 2015

We introduce an implementation of magnetophoresis to measure the absolute magnetization of ferromagnetic nanorods dispersed in fluids, by analyzing the velocity of single nanorods under an applied magnetic field gradient. A microfluidic guideway prevents aggregation of nanorods, isolates them, and confines their motion for analysis. We use a three-dimensional imaging system to precisely track nanorod velocity and particle-surface proximity. We test the effect of the guideway on nanorod velocity under field gradient application, finding that it guides magnetophoresis, but imposes insignificant drag beyond that of a planar surface. This result provides insight into the transport of magnetic nanorods at microstructured interfaces and allows the use of an analytical model to accurately determine the reacted viscous drag in the force balance needed for quantitative magnetometry. We also estimate the confining potential of the guideway with Brownian motion measurements and Boltzmann statistics. We use our technique to measure the magnetization of ferromagnetic nanorods with a noise floor of 8.5 × 10−20 A·m2·Hz−½. Our technique is quantitative, rapid, and scalable for determining the absolute magnetization of ferromagnetic nanoparticles with high throughput.
Metastable states of plasma particles close to a charged surface
Authors: Shavlov A. V. , Dzhumandzhi V. A.
Published: September 2015

The free energy of the plasma particles and the charged surface that form an electroneutral system is calculated on the basis of the Poisson-Boltzmann equation. It is shown that, owing to correlation of light plasma particles near the charged surface and close to heavy particles of high charge, there can be metastable states in plasma. The corresponding phase charts of metastable states of the separate components of plasma, and plasma as a whole, are constructed. These charts depend on temperature, the charge magnitude, the size of the particles, and the share of the charge of the light carriers out of the total charge of the plasma particles.