bluuebunny/crossref_metadata_2025 huggingface dataset:
Modifications of amino acids using arenediazonium salts
Authors: Sengupta Saumitra , Chandrasekaran Srinivasan
Published: August 2019

Aryl transfer reactions from arenediazonium salts have started to make their impact in chemical biology with initial forays in the arena of arylative modifications and bio-conjugations of amino acids, peptides and proteins.
Toward a high performance asymmetric hybrid capacitor by electrode optimization
Authors: Liu Ying , Hu Pengfei , Liu Hengqi , Song Jianrong , Umar Ahmad , Wu Xiang
Published: August 2019

Molybdenum disulfide (MoS2) is an extremely promising electrode material for supercapacitors due to its superior electrochemical performance and conductivity.
Aqueous carbofuran removal using slow pyrolyzed sugarcane bagasse biochar: equilibrium and fixed-bed studies
Authors: Vimal Vineet , Patel Manvendra , Mohan Dinesh
Published: August 2019

Sugarcane bagasse biochar was prepared, characterized and used for aqueous carbofuran removal. Sorption equilibrium and dynamics studies were carried out. An adsorption capacity of 19 mg g−1 was obtained at 45 °C. Carbofuran adsorption mechanism has been proposed.
Fluorescent delivery vehicle containing cobalt oxide–umbelliferone nanoconjugate: DNA/protein interaction studies and anticancer activity on MF7 cancer cell line
Authors: Ali Mohd Sajid , Tabassum Sartaj , Al-Lohedan Hamad A. , Farah Mohammad Abul , Al-Anazi Khalid Mashay , Usman Mohammad
Published: August 2019

Model of drug-nanoconjugate with DNA and HSA.
Hofmann-like metal–organic-framework-derived PtxFe/C/N-GC composites as efficient electrocatalysts for methanol oxidation
Authors: Zhao Jia , Huang Hui , Liu Ming , Wang Jin-Hua , Liu Kai , Li Zhao-Yang
Published: August 2019

Pt-based bimetallic catalysts derived from Pt/Fe-based metal–organic frameworks were prepared for electrocatalytic methanol oxidation, for which the mass activity is ten times higher than that of commercial Pt/C (20%) catalysts.
The promoted catalytic hydrogenation performance of bimetallic Ni–Co–B noncrystalline alloy nanotubes
Authors: Mo Min , Xie Mingjiang , Guo Xiaojuan , Ding Weiping , Guo Xuefeng
Published: August 2019

Ni–Co–B noncrystalline alloy nanotubes exhibited higher catalytic activity and better stability due to the synergistic interactions between nickel and cobalt.
Functionalized polycarbonates via triphenylborane catalyzed polymerization-hydrosilylation
Authors: Andrea Kori A. , Kerton Francesca M.
Published: August 2019

Lewis acid-base pair can be used to make functional polymers from carbon dioxide in a single-pot through tandem catalysis.
Correction: iTRAQ-based quantitative proteomic analysis for identification of biomarkers associated with emodin against severe acute pancreatitis in rats
Authors: Xiang Hong , Zhang Qingkai , Wang Danqi , Xia Shilin , Wang Guijun , Zhang Guixin , Chen Hailong , Wu Yingjie , Shang Dong
Published: August 2019

Correction for ‘iTRAQ-based quantitative proteomic analysis for identification of biomarkers associated with emodin against severe acute pancreatitis in rats’ by Hong Xiang et al., RSC Adv., 2016, 6, 72447–72457.
All-inorganic quantum dot assisted enhanced charge extraction across the interfaces of bulk organo-halide perovskites for efficient and stable pin-hole free perovskite solar cells
Authors: Ghosh Dibyendu , Chaudhary Dhirendra K. , Ali Md. Yusuf , Chauhan Kamlesh Kumar , Prodhan Sayan , Bhattacharya Sayantan , Ghosh Barun , Datta P. K. , Ray Sekhar C. , Bhattacharyya Sayan
Published: August 2019

Grain boundaries in bulk perovskite films are considered as giant trapping sites for photo-generated carriers. Surface engineering via inorganic perovskite quantum dots has been employed for creating monolithically grained, pin-hole free perovskite films.
Stokesian dynamics of sedimenting elastic rings
Authors: Gruziel-Słomka Magdalena , Kondratiuk Paweł , Szymczak Piotr , Ekiel-Jeżewska Maria L.
Published: August 2019

We study numerically the dynamics of elastic microfilaments which form closed loops and settle under gravity in a viscous fluid. We observe diversity of periodic and stationary sedimentation modes, dependent on flexibility and initial configuration.
Origins of capacity and voltage fading of LiCoO2 upon high voltage cycling
Authors: Jiang Yuyuan , Qin Changdong , Yan Pengfei , Sui Manling
Published: August 2019

High voltage cycling caused capacity decay and voltage fading of LiCoO2 are respectively due to bulk structure degradation and blocking effect of cathode/electrolyte interphase (CEI) layer.
A laser-fabricated nanometer-thick carbon film and its strain-engineering for achieving ultrahigh piezoresistive sensitivity
Authors: Luo Jiangjiang , Duan Xiaoshuang , Chen Zhepeng , Ruan Xiaojun , Yao Yanbo , Liu Tao
Published: August 2019

With fused quartz to support polyimide, dense and nanometer-thick carbon films were fabricated by direct laser writing carbonization. Strain-engineering induced micro/nanocrack formation imparts such film with record-high piezoresistive sensitivity.
Solution-processable Yb/Er 2D-layered metallorganic frameworks with high NIR-emission quantum yields
Authors: Artizzu Flavia , Atzori Matteo , Liu Jing , Mara Dimitrije , Van Hecke Kristof , Van Deun Rik
Published: August 2019

2D-layered Yb/Er homo- and heterometallic MOFs with the chlorocyananilate linker display long-lived NIR emission and high total quantum yields upon ligand excitation over the whole UV-visible spectrum.
Cell matrix adhesion in cell migration
Authors: Conway James R.W. , Jacquemet Guillaume
Published: August 2019

The ability of cells to migrate is a fundamental physiological process involved in embryonic development, tissue homeostasis, immune surveillance and wound healing. In order for cells to migrate, they must interact with their environment using adhesion receptors, such as integrins, and form specialized adhesion complexes that mediate responses to different extracellular cues. In this review, we discuss the role of integrin adhesion complexes (IACs) in cell migration, highlighting the layers of regulation that are involved, including intracellular signalling cascades, mechanosensing and reciprocal feedback to the extracellular environment. We also discuss the role of IACs in extracellular matrix remodeling and how they impact upon cell migration.
Current mirror‐based compensation circuit for multi‐row read in‐memory computing
Authors: Lin Zhiting , Fang Yaqi , Peng Chunyu , Lu Wenjuan , Li Xuan , Wu Xiulong , Chen Junning
Published: August 2019

Multi‐row read plays an important role in in‐memory computing and its precision affects the accuracy of the calculation. In this brief Letter, a discharge compensation method is proposed for the linearisation of multi‐row read operations in static RAM. Current mirrors are added to bitlines to compensate for the discharge voltage. With compensation, the integral non‐linearity decreases by 72% compared with the situation without compensation. In addition, a wordline signal generation circuit based on replica bitline is proposed to reduce area cost.
Energy‐fair and flexible bandwidth‐based routing in multi‐domain green networks
Authors: Odabaşı Uğur , Alizadeh Hadi , Gözüpek Didem
Published: August 2019

Although green networking and fairness are both vital and rapidly increasing areas of research, providing energy‐fairness in multi‐domain green networks is a hitherto unexplored issue. In this study, the authors address energy‐fair routing in multi‐domain green networks by formulating an optimisation problem as an integer linear programme. The authors' problem maximises the energy saving of the domain with minimum energy saving while ensuring that the energy consumption of each domain is below a given threshold. The model they have established in this study also provides a flexible bandwidth assignment mechanism which improves the feasibility performance of their methods. They then propose a polynomial‐time heuristic algorithm for this problem. They evaluate the performance of their heuristic algorithm by comparison with the results obtained from their integer linear programming formulation using optimisation software CPLEX. The simulation results demonstrate that the heuristic algorithm yields close results to the values obtained from the CPLEX implementation of their proposed formulation in terms of energy‐fairness and outperforms the previous results while at the same time having low computational complexity.
CSDGP: cluster switched data gathering protocol for mobile wireless sensor networks
Authors: Karunanithy Kalaivanan , Velusamy Bhanumathi
Published: August 2019

Nowadays, most of the research focuses on the distributed algorithm to form the clusters in wireless sensor networks, in which the sensor nodes act autonomously to self‐configure themselves with the help of the local information. However, the issues in such distributed mechanisms are (i) how to assign the time division multiple access (TDMA) schedule to collect the data from the cluster member (CM), (ii) how to distribute and balance the overall energy consumption of the cluster heads (CHs) under the circumstance of node's mobility. To overcome these problems, a cluster switched data gathering protocol (CSDGP) is proposed which ensures a uniform distribution of CHs by utilising a waiting time‐based CH selection and an effective cluster switch based TDMA scheduling mechanism. The salient feature observed in the proposed CSDGP is that the migrated node has a chance to transmit the sensed data to the CH, whenever the CH has a free time slot. From the simulation results, it is proved that CSDGP provides a good performance under three different scenarios in comparison with existing protocols in terms of average energy consumption, average end‐to‐end delay, packet delivery ratio, and control overhead.
Blockchain in internet‐of‐things: a necessity framework for security, reliability, transparency, immutability and liability
Authors: Tariq Usman , Ibrahim Atef , Ahmad Tariq , Bouteraa Yassine , Elmogy Ahmed
Published: August 2019

Blockchain is a distributed operation and information supervision technology programmed initially for Bitcoin cryptocurrency. The awareness in Blockchain technology is rapidly growing since the notion was invented in the year 2008. The motivation for the concentration in Blockchain is its significant characteristics that deliver security, privacy, and information reliability devoid of any additional system regulating the communications, and consequently it generates fascinating research domains, specifically from the viewpoint of methodological difficulties and restrictions. This study discovers the wide‐ranging Blockchain technology and studies it's perspective with respect to ‘internet‐of‐things’ controlled nodes. A resilient prototype method has been programmed that reveals a basic system exhausting Blockchain. The outcome illustrates that the established method is functional in test‐bed environment.
Spectral efficiency analysis for massive MIMO systems in Ricean fading channels
Authors: Xin Yuanxue , Zhang Rongqing , Shi Pengfei , Su Xin , Zhang Xuewu
Published: August 2019

This study focuses on the spectral efficiency of massive multiple‐input–multiple‐output (MIMO) systems over Ricean fading channels. Assuming the channel reciprocity of uplink and downlink transmissions, the channels are estimated through uplink pilot sequence with least minimum mean square error (MMSE) estimator, which facilitates the investigation of equivalent channel model. With the equivalent channel model, adopting joint MMSE receiver, the uplilnk achievable sum‐rate is studied, and finally, the asymptotic expression of spectral efficiency is obtained. Based on the proposed asymptotic spectral efficiency, numerical results give some guidelines about system parameters design: the authors should choose a proper length of the block fading channels to reduce the effect of pilot overhead, and an optimal length of pilot sequence always exists to guarantee a satisfying system performance in terms of spectral efficiency. Furthermore, the simulation results show that when fixing the number of users, shrinking the cell serving area and increasing the number of antennas can improve the system performance.
Selection of appropriate load compositions for predicting the dynamic performance of distribution grids
Authors: Roy Naruttam Kumar , Pota Hemanshu Roy
Published: August 2019

In this study, the significant effects of the load models used to analyse low‐voltage power systems are presented and a systematic process for selecting appropriate load compositions to evaluate the performance of distribution systems containing distributed generation is proposed. The driving force behind, and key reasons for, voltage instability are analysed by evaluating different load models subjected to grid disturbances. The stability conditions of distribution systems are also checked through time‐domain simulations performed on various network configurations, such as radial, loop, and mesh topologies. The system's responses to changes in the substation's voltage and contingency events are also demonstrated. It is found that the types and order of load models used greatly affect a system's voltage stability and therefore, an accurate load modelling is necessary to support the renewables integration in distribution systems. As the system's response is found to be sensitive to the network's topology and actual load composition, an approach that selects appropriate load compositions which, in turn, reduces the huge investment costs of improper planning, is proposed. The effectiveness of the proposed approach is verified by connecting static synchronous compensators to the network under varying load compositions.
Frequency coupling characteristics of electromagnetic oscillation in grid‐connected converters
Authors: Wang Yuzhi , Wang Liang , Jiang Qirong
Published: August 2019

Under certain conditions, grid‐connected voltage source converter (VSC) may result in electromagnetic oscillations. Many coupling components with different frequencies could be observed in converter outputs when oscillation happens. The characteristics and mechanism of frequency coupling phenomenon in oscillations of VSC are studied. The magnitude relationship between first‐order components in the three‐phase domain is drawn by impedance model. The two first‐order components will result in higher‐order components due to the non‐linearity of VSC controller. There are mainly three coupling paths in a controller: phase‐locked loop, DC voltage fluctuation and overmodulation. The coupling mechanism and frequency distribution characteristics are investigated in this study. Theoretical results are validated by simulations with PSCAD/EMTDC.
Multi‐radar fusion technique for high‐resolution ISAR imaging in sea‐cluttered environment
Authors: Yi Liu , Ding Dazhi , Chen Rushan , Tao Shifei
Published: August 2019

Radar imaging of the ship is one of the important means for surveillance and reconnaissance of targets. Here, the K‐distribution is used for the statistical characterisation of echo model in sea‐clutter environment. FEKO software is used to simulate the ship model. The multi‐radar data fusion technique and Sparse Bayesian learning algorithm are used to generate ISAR target images in the different levels of sea condition. The simulation results show that the multi‐radar data fusion algorithm not only has a significant inhibitory effect on sea‐clutter but also improves the radar image resolution.
A suppression method against range deception jamming based on homologous localisation test
Authors: Huang Datong , Cui Guolong , Ge Mengmeng , Yu Xianxiang , Kong Lingjiang
Published: August 2019

In this article, an anti‐jamming technique based on homologous localisation test in multi‐static radar system is proposed to counter multi‐range‐false‐target deception jamming. At first, pre‐process is implemented in each receiver to group the targets that locate in the same direction and improve the accuracy of angle measurement. Then, the localisation of bistatic radar system is performed. Finally, homologous localisation test is implemented in fusion centre by using the localisation results from all the receivers. Simulation results demonstrate that the proposed suppression method can discriminate false targets effectively and realise the localisation of the true target.
Structural and dynamical modeling of WINGS clusters
Authors: Mamon G. A. , Cava A. , Biviano A. , Moretti A. , Poggianti B. , Bettoni D.
Published: August 2019

The orbital shapes of galaxies of different classes are a probe of their formation and evolution. The Bayesian MAMPOSSt mass-orbit modeling algorithm is used to jointly fit the distribution of elliptical, spiral-irregular, and lenticular galaxies in projected phase space, on three pseudo-clusters (built by stacking the clusters after re-normalizing their positions and velocities) of 54 regular clusters from the Wide-field Nearby Galaxy-clusters Survey (WINGS), with at least 30 member velocities. Our pseudo-clusters (i.e., stacks) contain nearly 5000 galaxies with available velocities and morphological types. Thirty runs of MAMPOSSt with different priors are presented. The highest MAMPOSSt likelihoods are obtained for generalized Navarro-Frenk-White (NFW) models with steeper inner slope, free-index Einasto models, and double NFW models for the cluster and the brightest cluster galaxy. However, there is no strong Bayesian evidence for a steeper profile than the NFW model. The mass concentration matches the predictions from cosmological simulations. Ellipticals usually best trace the mass distribution while S0s are close. Spiral galaxies show increasingly elongated orbits at increasing radii, as do S0s on two stacks, and ellipticals on one stack. The inner orbits of all three types in the three stacks are consistent with isotropy. Spiral galaxies should transform rapidly into early-types given their much larger extent in clusters. Elongated outer orbits are expected for the spirals, a consequence of their recent radial infall into the cluster. The less elongated orbits we find for early-types could be related to the longer time spent by these galaxies in the cluster. We demonstrate that two-body relaxation is too slow to explain the inner isotropy of the early types, which suggests that inner isotropy is the consequence of violent relaxation during major cluster mergers or dynamical friction and tidal braking acting on subclusters. We propose that the inner isotropy of the short-lived spirals is a selection effect of spirals passing only once through pericenter before being transformed into early-type morphologies.
Evidence for a Chandrasekhar-mass explosion in the Ca-strong 1991bg-like type Ia supernova 2016hnk
Authors: Galbany L. , Ashall C. , Höflich P. , González-Gaitán S. , Taubenberger S. , Stritzinger M. , Hsiao E. Y. , Mazzali P. , Baron E. , Blondin S. , Bose S. , Bulla M. , Burke J. F. , Burns C. R. , Cartier R. , Chen P. , Della Valle M. , Diamond T. R. , Gutiérrez C. P. , Harmanen J. , Hiramatsu D. , Holoien T. W.-S. , Hosseinzadeh G. , Howell D. Andrew , Huang Y. , Inserra C. , de Jaeger T. , Jha S. W. , Kangas T. , Kromer M. , Lyman J. D. , Maguire K. , Marion G. Howie , Milisavljevic D. , Prentice S. J. , Razza A. , Reynolds T. M. , Sand D. J. , Shappee B. J. , Shekhar R. , Smartt S. J. , Stassun K. G. , Sullivan M. , Valenti S. , Villanueva S. , Wang X. , Wheeler J. Craig , Zhai Q. , Zhang J.
Published: August 2019

Aims. We present a comprehensive dataset of optical and near-infrared photometry and spectroscopy of type Ia supernova (SN) 2016hnk, combined with integral field spectroscopy (IFS) of its host galaxy, MCG -01-06-070, and nearby environment. Our goal with this complete dataset is to understand the nature of this peculiar object.

Methods. Properties of the SN local environment are characterized by means of single stellar population synthesis applied to IFS observations taken two years after the SN exploded. We performed detailed analyses of SN photometric data by studying its peculiar light and color curves. SN 2016hnk spectra were compared to other 1991bg-like SNe Ia, 2002es-like SNe Ia, and Ca-rich transients. In addition, we used abundance stratification modeling to identify the various spectral features in the early phase spectral sequence and also compared the dataset to a modified non-LTE model previously produced for the sublumnious SN 1999by.

Results. SN 2016hnk is consistent with being a subluminous (MB = −16.7 mag, sBV=0.43 ± 0.03), highly reddened object. The IFS of its host galaxy reveals both a significant amount of dust at the SN location, residual star formation, and a high proportion of old stellar populations in the local environment compared to other locations in the galaxy, which favors an old progenitor for SN 2016hnk. Inspection of a nebular spectrum obtained one year after maximum contains two narrow emission lines attributed to the forbidden [Ca II] λλ7291,7324 doublet with a Doppler shift of 700 km s−1. Based on various observational diagnostics, we argue that the progenitor of SN 2016hnk was likely a near Chandrasekhar-mass (MCh) carbon-oxygen white dwarf that produced 0.108 M⊙ of 56Ni. Our modeling suggests that the narrow [Ca II] features observed in the nebular spectrum are associated with 48Ca from electron capture during the explosion, which is expected to occur only in white dwarfs that explode near or at the MCh limit.
MCDHF and RCI calculations of energy levels, lifetimes, and transition rates in Si III and Si IV
Authors: Atalay B. , Brage T. , Jönsson P. , Hartman H.
Published: August 2019

We present extensive multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction calculations including 106 states in doubly ionized silicon (Si III) and 45 states in triply ionized silicon (Si IV), which are important for astrophysical determination of plasma properties in different objects. These calculations represents an important extension and improvement of earlier calculations especially for Si III. The calculations are in good agreement with available experiments for excitation energies, transition properties, and lifetimes. Important deviations from the NIST-database for a selection of perturbed Rydberg series are discussed in detail.
Spatially resolved spectroscopy of the debris disk HD 32297
Authors: Bhowmik T. , Boccaletti A. , Thébault P. , Kral Q. , Mazoyer J. , Milli J. , Maire A. L. , van Holstein R. G. , Augereau J.-C. , Baudoz P. , Feldt M. , Galicher R. , Henning T. , Lagrange A.-M. , Olofsson J. , Pantin E. , Perrot C.
Published: August 2019

Context. Spectro-photometry of debris disks in total intensity and polarimetry can provide new insight into the properties of the dust grains therein (size distribution and optical properties).

Aims. We aim to constrain the morphology of the highly inclined debris disk HD 32297. We also intend to obtain spectroscopic and polarimetric measurements to retrieve information on the particle size distribution within the disk for certain grain compositions.

Methods. We observed HD 32297 with SPHERE in Y, J, and H bands in total intensity and in J band in polarimetry. The observations are compared to synthetic models of debris disks and we developed methods to extract the photometry in total intensity overcoming the data-reduction artifacts, namely the self-subtraction. The spectro-photometric measurements averaged along the disk mid-plane are then compared to model spectra of various grain compositions.

Results. These new images reveal the very inner part of the system as close as 0.15″. The disk image is mostly dominated by the forward scattering making one side (half-ellipse) of the disk more visible, but observations in total intensity are deep enough to also detect the back side for the very first time. The images as well as the surface brightness profiles of the disk rule out the presence of a gap as previously proposed. We do not detect any significant asymmetry between the northeast and southwest sides of the disk. The spectral reflectance features a “gray to blue” color which is interpreted as the presence of grains far below the blowout size.

Conclusions. The presence of sub-micron grains in the disk is suspected to be the result of gas drag and/or “avalanche mechanisms”. The blue color of the disk could be further investigated with additional total intensity and polarimetric observations in K and H bands respectively to confirm the spectral slope and the fraction of polarization.
The influence of Hinode/SOT NFI instrumental effects on the visibility of simulated prominence fine structures in Hα
Authors: Gunár S. , Jurčák J. , Ichimoto K.
Published: August 2019

Context. Models of entire prominences with their numerous fine structures distributed within the prominence magnetic field use approximate radiative transfer techniques to visualize the simulated prominences. However, to accurately compare synthetic images of prominences obtained in this way with observations and to precisely analyze the visibility of even the faintest prominence features, it is important to take into account the influence of instrumental properties on the synthetic spectra and images.

Aims. In the present work, we investigate how synthetic Hα images of simulated prominences are impacted by the instrumental effects induced by the Narrowband Filter Imager (NFI) of the Solar Optical Telescope (SOT) onboard the Hinode satellite.

Methods. To process the synthetic Hα images provided by 3D Whole-Prominence Fine Structure (WPFS) models into SOT-like synthetic Hα images, we take into account the effects of the integration over the theoretical narrow-band transmission profile of NFI Lyot filter, the influence of the stray-light and point spread function (PSF) of Hinode/SOT, and the observed noise level. This allows us to compare the visibility of the prominence fine structures in the SOT-like synthetic Hα images with the synthetic Hα line-center images used by the 3D models and with a pair of Hinode/SOT NFI observations of quiescent prominences.

Results. The comparison between the SOT-like synthetic Hα images and the synthetic Hα line-center images shows that all large and small-scale features are very similar in both visualizations and that the same very faint prominence fine structures can be discerned in both. This demonstrates that the computationally efficient Hα line-center visualization technique can be reliably used for the purpose of visualization of complex 3D prominence models. In addition, the qualitative comparison between the SOT-like synthetic images and prominence observations shows that the 3D WPFS models can reproduce large-scale prominence features rather well. However, the distribution of the prominence fine structures is significantly more diffuse in the observations than in the models and the diffuse intensity areas surrounding the observed prominences are also not present in the synthetic images. We also found that the maximum intensities reached in the models are about twice as high as those present in the observations–an indication that the mass-loading assumed in the present 3D WPFS models might be too large.
Optical characterization of WISE selected blazar candidates
Authors: de Menezes Raniere , Peña-Herazo Harold A. , Marchesini Ezequiel J. , D’Abrusco Raffaele , Masetti Nicola , Nemmen Rodrigo , Massaro Francesco , Ricci Federica , Landoni Marco , Paggi Alessandro , Smith Howard A.
Published: August 2019

Context. Over the last decade more than five thousand γ-ray sources have been detected by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. Given the positional uncertainty of the telescope, nearly 30% of these sources remain without an obvious counterpart at lower energies. This has motivated the release of new catalogs of γ-ray counterpart candidates and several follow up campaigns in the last decade.

Aims. Recently, two new catalogs of blazar candidates were released. These are the improved and expanded version of the WISE Blazar-Like Radio-Loud Sources (WIBRaLS2) catalog and the Kernel Density Estimation selected candidate BL Lacs (KDEBLLACS) catalog, both selecting blazar-like sources based on their infrared colors from the Wide-field Infrared Survey Explorer (WISE). In this work we characterize these two catalogs, clarifying the true nature of their sources based on their optical spectra from SDSS data release 15, thus testing their efficiency in selecting true blazars.

Methods. We first selected all WIBRaLS2 and KDEBLLACS sources with available optical spectra in the footprint of Sloan Digital Sky Survey data release 15. We then analyzed these spectra to verify the nature of each selected candidate and to measure the fraction of the catalogs composed by spectroscopically confirmed blazars. Finally, we evaluated the impact of selection effects, especially those related to optical colors of WIBRaLS2/KDEBLLACS sources and their optical magnitude distributions.

Results. We found that at least ∼30% of each catalog is made up of confirmed blazars, with quasars being the major contaminants in the case of WIBRaLS2 (≈58%) and normal galaxies in the case of KDEBLLACS (≈38.2%). The spectral analysis also allowed us to identify the nature of 11 blazar candidates of uncertain type (BCUs) from the Fermi-LAT fourth Point Source Catalog (4FGL) and to find 25 new BL Lac objects.
Dossier : Le groupe des Dix, des précurseurs de l'interdisciplinarité – Physics, philosophy and poetics at the end of the Groupe des Dix: Edgar Morin and Michel Serres on the nature of Nature
Authors: Dicks Henry
Published: August 2019

This article argues that by the time of the Groupe des Dix’s dissolution in 1976, at least some of its members had departed significantly from the intellectual framework inherited from America’s Cybernetics Group. Focusing on two key publications of 1977, Edgar Morin’s La méthode, tome 1 : la nature de la nature and Michel Serres’s La naissance de la physique dans le texte de Lucrèce. Fleuves et turbulences, I show how the group’s two most philosophically oriented thinkers both broke with the “paradigm of the artificial machine” characteristic of cybernetics, developing in its place a new understanding of Nature centred on the figure of the vortex and the concept of self-production. This renewed understanding of Nature in turn entails an attempt to re-think the foundations of the life, human and artificial sciences via an original articulation of physics, philosophy and poetics.
Der Verband der Diabetes-Beratungs-und Schulungsberufe in Deutschland informiert
Authors: Luck-Sikorski Claudia
Published: August 2019

Depressionen zählen zu den häufigsten psychischen Störungen. Die 12-Monats-Prävalenz in Deutschland beträgt ca. 8 % 1. Ein bedeutender Risikofaktor für das Auftreten einer Depression ist das Vorhandensein oder die Entwicklung einer somatischen Erkrankung. Dieser Zusammenhang ist zweiseitig: Auf der einen Seite ist die Belastung durch Erkrankungen für sich ein Risikofaktor für Depressionen. Andererseits können jedoch auch Depressionen zu somatischen Erkrankungen führen bzw. diese begünstigen. Für Diabetes mellitus wurde der zweiseitige Zusammenhang vielfach beschrieben.
Medikamenteninduzierter Diabetes mellitus
Authors: Joost Hans-Georg
Published: August 2019

Zahlreiche Pharmaka können die Glukosehomöostase stören und eine reduzierte Glukosetoleranz oder einen Diabetes mellitus verursachen. Diese Komplikation ist häufig (10–20 %) unter Glukokortikoiden, Statinen, Immunsuppressiva, mehreren Zytostatika sowie HIV-Virostatika. Der medikamenteninduzierte Diabetes entspricht meistens einem Typ-2-Diabetes, aber auch insulinpflichtiger Autoimmundiabetes ist nach Interferon alpha oder einer Tumorimmuntherapie beschrieben. Der medikamenteninduzierte Diabetes muss therapeutische Konsequenzen haben, selbst wenn die Hyperglykämie moderat ist, da mit Sekundärkomplikationen des Diabetes gerechnet werden muss.
Postoperative Venous Thromboembolism Prophylaxis: Changes in the Daily Clinical Practice, Modified Guidelines
Authors: Samama Charles Marc
Published: August 2019

With current clinical practice, postoperative venous thromboembolism (VTE) risk is not only well controlled, but it is steadily decreasing, especially in orthopaedic surgery, thanks to fast-track and day case procedures, new surgical techniques, and potent antithrombotic agents. Thromboprophylaxis is becoming increasingly adapted to these patients. Aspirin is also extensively prescribed in total hip replacement and total knee replacement procedures in the United States and Australia. Mechanical prophylaxis is sometimes applied alone but most often combined with anticoagulant agents. However, large evidence-based studies are still needed to confirm these optimistic tendencies. In the meantime, physicians have to keep strong control over the VTE risk to prevent the reappearance of pulmonary embolism after admission to the surgical wards.
Analysis of mitral valve regurgitation by computational fluid dynamics
Authors: Collia Dario , Zovatto Luigino , Pedrizzetti Gianni
Published: August 2019

The clinical syndrome of mitral insufficiency is a common consequence of mitral valve (MV) prolapse, when the MV leaflets do not seal the closed orifice and blood regurgitates back to the atrium during ventricular contraction. There are different types of MV prolapse that may influence the degree of regurgitation also in relation to the left ventricle (LV) geometry. This study aims to provide some insight into the fluid dynamics of MV insufficiency in view of improving the different measurements available in the clinical setting. The analysis is performed by a computational fluid dynamics model coupled with an asymptotic model of the MV motion. The computational fluid dynamics solution uses the immersed boundary method that is efficiently integrated with clinical imaging technologies. Healthy and dilated LVs obtained by multislice cardiac MRI are combined with simplified models of healthy and pathological MVs deduced from computed tomography and 4D-transesophageal echocardiography. The results demonstrated the properties of false regurgitation, blood that did not cross the open MV orifice and returns into the atrium during the backward motion of the MV leaflets, whose entity should be accounted when evaluating small regurgitation. The regurgitating volume is found to be proportional to the effective orifice area, with the limited dependence of the LV geometry and type of prolapse. These affect the percentage of old blood returning to the atrium which may be associated with thrombogenic risk.
An enhancement in thermal performance of partially ionized fluid due to hybrid nano-structures exposed to magnetic field
Authors: Nawaz M. , Nazir U.
Published: August 2019

This article considers ethylene glycol as a partially ionized base fluid whose rheological characteristics can be exhibited by Carreau stress-strain relations. This dispersion of nanoparticles (MoS2) and hybrid nanoparticles (a combination of (MoS2 and SiO2) in ethylene-glycol is considered and thermal performance of MoS2-Carreau nanofluid and hybrid nanofluid (MoS2-SiO2-ethylene glycol) are investigated numerically using FEM. The results are validated. The present theoretical analysis has shown that thermal performance of working fluid can be enhanced by the use of hybrid nano fluid rather than nano fluid. Unfortunately, shear stress on elastic surface exerted by hybrid nanofluid is greater than the shear stress exerted by nanofluid. Although the thermal performance of hybrid nano fluid is greater than the thermal performance of nanofluid but one must be cautious about strength of surface as it can afford sufficient stress otherwise thermal system may experience failure. Failure analysis prediction while using hybrid nanonfluid must be in mind. As ethylene glycol is partially ionized and its interaction with applied magnetic field induces Hall and ion slip currents. Due to Hall and ion slip currents, ethylene glycol experiences Hall and ion slip forces which are opposite to the Lorentz force of applied magnetic field. This Lorentz force is reduced Hall and ion slip forces. Consequently, the flow of ethylene glycol is accelerated when Hall and ion slip parameters are increased.
Launching Alfvén waves into Earth’s magnetosphere can save satellites from nuclear catastrophe
Authors: Bandari Anashe
Published: August 2019

Scientists have demonstrated a device that cheaply and efficiently scatters particles trapped in Earth’s radiation belt.
Simplified model of mitral valve regurgitations provides insight on heart disease
Authors: Mandel Savannah
Published: August 2019

Computational fluid dynamics of mitral valve regurgitations are analyzed and used to improve information available in clinical settings.
SOBIR1/EVR prevents precocious initiation of fiber differentiation during wood development through a mechanism involving BP and ERECTA
Authors: Milhinhos Ana , Vera-Sirera Francisco , Blanco-Touriñán Noel , Mari-Carmona Cristina , Carrió-Seguí Àngela , Forment Javier , Champion Clément , Thamm Anna , Urbez Cristina , Prescott Helen , Agustí Javier
Published: August 2019

Significance

Secondary growth (thickening of stems and roots) provides the mechanical support that plants need to grow and sustain their structures, and results in wood formation. Although wood accounts for the largest proportion of terrestrial biomass, the identification through classical genetics of key elements that control secondary growth is hampered by the challenge of phenotyping traits associated with inner tissues. We have taken advantage of natural genetic variation to identify SOBIR1/EVR, a gene previously known for its involvement in plant immunity and abscission, as a regulator of the process, and demonstrate that it prevents precocious formation of xylem fiber cells through a mechanism that involves the activity of previously discovered master regulators of xylem fiber development.
Applying functional language analysis approach in Chinese college English reading classes
Authors: Sun Yinghui , Zhang Fang
Published: August 2019

This paper describes a study that applies Functional Language Analysis (FLA) in Chinese college English reading context to promote students’ understanding of the reading texts. Different from other commonly practiced reading activities, FLA encourages students to explore text meanings from aspects of content, organization and attitude, and how clues of lexical and grammatical resources help construct these three meanings. Thirty freshmen from a university in Beijing, China received FLA instruction for four months. Data were collected from students’ analysis of reading tasks, presentations, and questionnaires. The study found that FLA is effective in facilitating Chinese students’ active exploration of the text. Specifically, through an examination of participants, processes, and circumstances, students were able to comprehend the content meaning accurately. With attention paid to themes, conjunctions, and other linking devices, they could picture the text structure. They also started to understand the author’s attitude by examining grammatical elements of formality, voice, mood, and modality. Additionally, FLA helped improve students’ confidence and interest in English reading. Positive influences of this approach on students’ other English skills such as listening, writing, and speaking were also reported. The findings suggest that FLA can be successfully implemented in Chinese reading classes.
Period investigation of Algol systems TZ Eri and TU Her
Authors: Wang Zhi-Hua , Zhu Li-Ying , Li Lin-Jia , Tian Xiao-Man
Published: August 2019

TZ Eri and TU Her are both classic Algol-type systems (Algols). By observing and collecting times of minimum light, we constructed the O – C curves for the two systems. The long-time upward and downward parabolas shown in these diagrams are considered to be the result of the combination of mass transfer and angular momentum loss. The secular orbital period change rates are dP/dt = 4.74(± 0.12) × 10−7 d yr−1 and dP/dt = −2.33(± 0.01)× 10−6 d yr−1, respectively. There are also cyclic variations in their O – C curves which might be caused by the light-travel time effect (LTTE). A circumbinary star may exist in the TZ Eri system with a mass of at least 1.34 M
⊙, while there are possibly two celestial bodies that almost follow a 2 : 1 resonance orbit around the TU Her binary pair. Their masses are at least 2.43 M
⊙ and 1.27 M
⊙.
From multicolor-photometric observations to a guaranteed mass of AL Cas
Authors: Wang Ya-Hui , Liu Jin-Zhong , Lu Li-Na , Lü Guo-Liang
Published: August 2019

We utilize the PAdova and TRieste Stellar Evolution Code (PARSEC) combined with photometric observations to determine a guaranteed mass of AL Cas and re-examine its related physical parameters. Multicolor-photometric observations of AL Cas have been performed in 2016 and 2017. We use the Wilson-Devinney (W-D) code to analyze the light curves and find that AL Cas is probably an A-subtype contact binary (f = 35.7±0.9%) with a mass ratio q = 0.6399±0.0230 and an effective temperature difference ΔT = 78 K. The mass-radius relation of a higher luminosity component for AL Cas is obtained by two methods: depending on calculation of the Roche lobe (DCRL method) and depending on calculation of the W-D code (DCWD method). Using this relationship with the PARSEC model, we investigate the component masses of AL Cas as M
1 = 1.19±0.23 M
⊙ with M
2 = 0.76±0.18 M
⊙ by the DCRL method and M
1 = 1.22±0.26 M
⊙ with M
2 = 0.78±0.20 M
⊙ by the DCWD method. By means of the photometric studies, we examine the related physical properties of AL Cas with the latest findings. We update the orbital period (P
orb = 0.50055593 d) of AL Cas according to six new times of light minimum together with those collected from the literature. Meanwhile, the (O – C)2 curve analysis suggests that the orbital period of AL Cas has a cyclic variation with a period of 81.25 yr and an amplitude of 0.01415 d. This cyclic change would be caused by the light-travel time effect from a third body. A similar mass of the third body (M
3 sin i′ = 0.279 M
⊙) is derived from our two methods.
The galaxy luminosity function in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap
Authors: Zhao Pin-Song , Wu Hong , Kevin Xu Cong , Yang Ming , Yang Fan , Zhu Yi-Nan , I Lam Man , Jin Jun-Jie , Yuan Hai-Long , Zhang Hao-Tong , Shen Shi-Yin , Shi Jian-Rong , Luo A-Li , Wu Xue-Bing , Zhao Yong-Heng , Jing Yi-Peng
Published: August 2019

We present optical luminosity functions (LFs) of galaxies in the 0.1
g, 0.1
r, 0.1
i bands, calculated using data in

∼
40

deg

2

sky area of the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap. Redshifts for galaxies brighter than r = 18.1 were obtained mainly with LAMOST. In each band, LFs derived using both parametric and non-parametric maximum likelihood methods agree well with each other. In the 0.1
r band, our fitting parameters of the Schechter function are

ϕ

*

=
(
1.65
±
0.36
)
×

10

−
2

h

3

Mpc

−
3

,

M

*

=
−
20.69
±
0.06

mag

and

α
=
−
1.12
±
0.08

, which agree with previous studies. Separate LFs are also derived for emission line galaxies and absorption line galaxies. The LFs of absorption line galaxies show a dip at 0.1
r**

∼

18.5 and can be fitted well by a double-Gaussian function, suggesting a bimodality in passive galaxies.
Observational signature of a wind bubble environment for double neutron star mergers
Authors: Li Yong-Sen , Chen Aming , Yu Yun-Wei
Published: August 2019

During the in-spiral stage of a compact binary, a wind bubble could be blown into the interstellar medium, if electromagnetic radiation due to the binary orbital motion is strong enough. Therefore, short-duration gamma-ray bursts (SGRBs) due to double neutron star mergers would in principle happen in a wind bubble environment, which can influence the propagation of the SGRB jet and consequent afterglow emission. By calculating the dynamics and synchrotron radiation of the jet-driven external shock, we reveal that an abrupt jump could appear in the afterglow light curves of SGRBs and the observational time of the jump is dependent on the viewing angle. This light curve jump provides an observational signature to constrain the radius of the wind bubble and thus the power of the electromagnetic radiation of the binary, by combining with gravitational wave detection.
A fiber bundle structure with uniform transmission characteristics for high-density astronomical optical cables
Authors: Yan Qi , Geng Tao , Jiang Hang , Zhao Chuang , Zhang Ying-Hua , Wang An-Zhi , Wang Jia-Bin , Jin Xi-Ren , Chen Xu-Dong , Lu Chun-Lian , Wang Liang , Huang Zhi-Xin , Zhuang Jing-Dong , Wang Song , Sun Wei-Min , Cui Xiang-Qun
Published: August 2019

Transmission efficiency (TE) and focal ratio degradation (FRD) are two important parameters for evaluating the quality of an optical fiber system used for astronomy. Compared to TE, the focal ratio is more easily influenced by external factors, such as bending or stress. Optical cables are widely implemented for multi-object telescopes and integral field units (IFUs). The design and fabrication process of traditional optical cables seldom considers the requirements of astronomical applications. In this paper, we describe a fiber bundle structure as the basic unit for miniaturized high-density FASOT-IFU optical cables, instead of the micro-tube structure in stranded cables. Seven fibers with hexagonal arrangement were accurately positioned by ultraviolet (UV)-curing acrylate to form the bundle. The coating diameter of a fiber is 0.125 mm, and the outer diameter of the bundle is 0.58 mm. Compared with the 0.8 mm micro-tube structure of a traditional stranded cable, the outer diameter of the fiber bundle was reduced by 27.5%. Fiber paste was filled into the bundle to reduce stress between the fibers. We tested the output focal ratio (OFR) in 95% of the encircled energy (EE95) of the fibers in the bundle under different conditions. With the incident focal ratio F/8, the maximum difference of OFR is 0.6. In particular, when the incident focal ratio is F/5, the maximum difference of OFR is only 0.1. The jacket formed by the UV-curing acrylate can withstand a certain stress of less than 1.38 N mm−1. The fiber bundle can maintain uniform emitting characteristics with a bending radius of 7.5 cm and with tension less than 6 N. The test results show that the structure of the fiber bundle can be used as a basic unit for miniaturized high-density astronomical optical cables.
Predication of Kerf Width and Surface Roughness in Waterjet Cutting using Neural Networks
Authors: Ramaswamy Pillai Swaroop , Reddy Madara Sahith , Pon Selvan Chithirai
Published: August 2019

Abrasive waterjet cutting is one of the unconventional methods used to cut some of the difficult to cut materials. In certain materials this method has proved to give better results compared to the conventional methods. In this model the water jet cutting is done on hastelloy using the three parameters which are abrasive mass flow rate, traverse speed, and the stand-off distance. The mathematical modelling to predict the kerf width based on these three input parameters is discussed in this paper. As the relation between the input and the output parameter is non-linear in nature neural network back propagation algorithm is used for the prediction. Here the experiment is conducted using waterjet cutting machine and the data’s like surface roughness, metal removal rate, kerf width and the kerf angle data are collected. Both the input and the output parameters are fed to the neural network toolbox programmed in the MATLAB. After 1000 iterations it has been found that the prediction is closer to the actual value. The mathematical constants which is the weight matrix is used to test the new set of data for accuracy. It has been found that the prediction is more accurate compared to the conventional methods. This experiment is based Taguch’s design which uses the above three parameters to cut the material. This paper also discusses on the predication of surface roughness of hastelloy created due to the variation in these parameters.