bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis of biodegradable and biorenewable polylactides initiated by aluminum complexes bearing m-xylylenediamine derivatives via the ring-opening polymerization of lactides
Authors: Li Dongni , Gao Bo , Duan Qian
Published: April 2019

Aluminum complexes derived from m-xylylenediamine were synthesized and investigated as initiators for l-lactide and rac-lactide polymerization.
Lattice constant-dependent anchoring effect of MXenes for lithium–sulfur (Li–S) batteries: a DFT study
Authors: Li Na , Meng Qiangqiang , Zhu Xiaohong , Li Zhen , Ma Jiale , Huang Changxiong , Song Jun , Fan Jun
Published: April 2019

A monotonical relationship between the binding energies and the lattice constants of M3C2O2 was identified, which indicated that M3C2O2 MXenes with a smaller lattice constant tends to exhibit a stronger anchoring effect.
Rh(i)-Catalyzed intramolecular [3 + 2] cycloaddition reactions of yne-vinylidenecyclopropanes
Authors: Rui Kang-Hua , Shi Min
Published: April 2019

A Rh(i)-catalyzed intramolecular [3 + 2] cycloaddition reaction of yne-vinylidenecyclopropanes has been developed, providing fused [6.5]-bicyclic products in moderate to good yields.
Bonding heterogeneity and lone pair induced anharmonicity resulted in ultralow thermal conductivity and promising thermoelectric properties in n-type AgPbBiSe3
Authors: Dutta Moinak , Pal Koushik , Waghmare Umesh V. , Biswas Kanishka
Published: April 2019

Synergistic effect of bonding inhomogeneity and local off-centering within global cubic structure results in ultralow thermal conductivity of n-type AgPbBiSe3.
Biomass-derived hierarchically porous carbon skeletons with in situ decorated IrCo nanoparticles as high-performance cathode catalysts for Li–O2 batteries
Authors: Shen Junrong , Wu Haitao , Sun Wang , Wu Qibing , Zhen Shuying , Wang Zhenhua , Sun Kening
Published: April 2019

Green biomass derived three-dimensional interconnected porous carbon skeletons with in situ decorated IrCo nanoparticles were fabricated for high-performance Li–O2 batteries.
Tailored near-infrared-emitting colloidal heterostructured quantum dots with enhanced visible light absorption for high performance photoelectrochemical cells
Authors: Channa Ali Imran , Tong Xin , Xu Jing-Yin , Liu Yongchen , Wang Changmeng , Sial Muhammad Naeem , Yu Peng , Ji Haining , Niu Xiaobin , Wang Zhiming M.
Published: April 2019

Near-infrared-emitting CuGaS2/CdS QDs with enhanced visible light absorption were developed to achieve high efficiency photoelectrochemical cells.
Porous hydrogen substituted graphyne for high capacity and ultra-stable sodium ion storage
Authors: Yang Ze , Zhang Chunfang , Hou Zhufeng , Wang Xin , He Jianjiang , Li Xiaodong , Song Yuwei , Wang Ning , Wang Kun , Wang Huanlei , Huang Changshui
Published: April 2019

Porous hydrogen substituted graphyne with high crystallinity is utilized as an anode with high capacity and ultra-stable sodium ion storage.
Improving the electroluminescence performance of blue light-emitting poly(fluorene-co-dibenzothiophene-S,S-dioxide) by tuning the intra-molecular charge transfer effects and temperature-induced orientation of the emissive layer structure
Authors: Hu Liwen , Liang Junfei , Zhong Wenkai , Guo Ting , Zhong Zhiming , Peng Feng , Fan Baobing , Ying Lei , Cao Yong
Published: April 2019

A luminous efficiency of 7.30 cd A−1was achieved in PFSO10TA2 as a result of temperature-induced orientation.
LOXL1-AS1 predicts poor prognosis and promotes cell proliferation, migration, and invasion in osteosarcoma
Authors: Chen Si , Li Weiguo , Guo Ai
Published: April 2019

lncRNA LOXL1 antisense RNA 1 (lncRNA LOXL1-AS1) was recently found to function as oncogenic lncRNA in glioblastoma, prostate cancer, and medulloblastoma. The role of LOXL1-AS1 in osteosarcoma was still unknown. In our study, we found LOXL1-AS1 expression levels were higher in osteosarcoma tissues and cell lines than normal bone tissues and normal osteoblast cell line, respectively. Moreover, high-expression of LOXL1-AS1 was correlated with Enneking stage, tumor size, distant metastasis, histological grade, and overall survival time in osteosarcoma patients. Furthermore, LOXL1-AS1 overexpression acted as an independent poor predictor for overall survival in osteosarcoma patients. The loss-of-function studies showed knockdown of LOXL1-AS1 dramatically inhibited osteosarcoma cell proliferation, migration, and invasion through suppressing PI3K-AKT pathway. In conclusion, LOXL1-AS1 predicts clinical progression and poor prognosis in osteosarcoma patients and functions as oncogenic lncRNA to regulate cell proliferation, cell cycle, migration, and invasion.
Genome-level responses to the environment: plant desiccation tolerance
Authors: Silva Artur Mariana A. , Costa Maria-Cecília D. , Farrant Jill M. , Hilhorst Henk W.M.
Published: April 2019

Plants being sessile organisms are well equipped genomically to respond to environmental stressors peculiar to their habitat. Evolution of plants onto land was enabled by the ability to tolerate extreme water loss (desiccation), a feature that has been retained within genomes but not universally expressed in most land plants today. In the majority of higher plants, desiccation tolerance (DT) is expressed only in reproductive tissues (seeds and pollen), but some 135 angiosperms display vegetative DT. Here, we review genome-level responses associated with DT, pointing out common and yet sometimes discrepant features, the latter relating to evolutionary adaptations to particular niches. Understanding DT can lead to the ultimate production of crops with greater tolerance of drought than is currently realized.
Ka‐band wideband VCO with LC filtering technique in 65‐nm CMOS
Authors: Ding Tianao , Fan Xiangning , Zhao Dixian
Published: April 2019

This Letter reports a 25.80–30.84 GHz wideband millimetre‐wave VCO in 65‐nm CMOS technology. A 4‐bit binary‐weighted capacitor bank is used to extend the tuning range. The PMOS current source, as well as the LC noise filtering network, are used to improve the phase‐noise performance. Occupying a core area of 0.056 mm2, the implemented VCO core consumes 4.1 mW at a 1 V supply. At 26 GHz, it achieves a phase noise of −102.8 dBc/Hz at 1 MHz offset.
Rectifying surface with optimal RF‐to‐DC efficiency insensitive to polarisation collimation
Authors: Li Ran , Chen Zheda , Huangfu Jiangtao , Ran Lixin , Ye Dexin
Published: April 2019

A rectifying surface for energy harvesting with optimal RF‐to‐DC efficiency insensitive to polarisation collimation is presented based on metasurface and branch‐line coupler. The metasurface captures two orthogonal components of incident wave by two separate loads with high efficiency. A 90° branch‐line coupler is introduced to redistribute two polarisation‐dependent components into two invariant equipower outputs, aiming to preserve continuous impedance‐matching between metasurface and rectifiers for maximised conversion efficiency. The proposed rectifying surface has been fabricated and measured. The measured fluctuation ranges of capture and conversion efficiency are smaller than 2 and 0.5%, respectively, agreeing well with authors’ prediction. They expect a wide range of applications to emerge from this novel concept in the future.
High‐power DC–DC converter utilising Scott transformer connection
Authors: Milovanović Stefan , Dujić Dražen
Published: April 2019

To obtain a resilient and flexible DC grid, reliable means for interfacing its parts operating under different voltage levels must be ensured. This paper proposes bidirectional, isolated, DC–DC converter designed to connect either high/medium voltage bipolar DC grid or two separate high/medium voltage DC grids with another DC grid of similar or different voltage level. In order to achieve galvanic separation among converter stages, while providing redundancy in case of the converter parts malfunction or a DC feeder loss, Scott transformer connection is employed. So far, Scott transformer connection has mostly been used in the railway applications, implying low‐frequency operation, in order to obtain two single‐phase voltages from a symmetrical three‐phase grid. However, its use in the field of the DC–DC conversion has never been analysed in the literature. Further, this paper emphasises operating frequency shift towards the medium frequency range, following the trend of the solid‐state transformers which have drawn the attention of both academia and industry worldwide. To control the converter power flow, phase shift control principles are adopted. Consequently, control simplicity is retained, while achieving system complexity reduction. At last, in order to evaluate proposed converter performance, simulation results of a 40 kV/1.5 kV, 10 MW converter are presented, illustrating excellent operating performances.
Path planning for autonomous underwater vehicle in time‐varying current
Authors: Cao Xiang , Sun Chang‐yin , Chen Ming‐zhi
Published: April 2019

Due to the complexity of underwater environment, the navigation of autonomous underwater vehicle (AUV) is affected by current. Although some traditional methods can plan the non‐collision path for AUV to reach the destination, it cannot overcome the influence of current on AUV navigation. In order to solve this problem, a velocity vector synthesis method combining belief function (BF) method is proposed. Among them, the BF method is used to dynamically plan the non‐collision path. The velocity vector synthesis method is used to adjust the AUVs movement direction to offset the effect of time‐varying current. The simulation results show that the proposed algorithm is effective and can overcome the problem of ‘current influence’. At the same time, compared with other methods, the proposed algorithm can guide AUV to achieve more efficient and adaptive path planning.
Hyperons at the BM@N experiment: first results
Authors: Gornaya Julia , Kapishin Mikhail , Plotnikov Vasiliy , Pokatashkin Gleb , Rufanov Igor , Vasendina Veronica , Zinchenko Alexander
Published: April 2019

BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the accelerator complex of NICA-Nuclotron at JINR (Dubna). The aim of the experiment is to study interactions of relativistic heavy ion beams of kinetic energy per nucleon ranging from 1 to 4.5 GeV with fixed targets. First results of the analysis of minimum bias interactions of the deuteron and carbon beams of 4 AGeV kinetic energy with different targets are discussed. Preliminary results from the data collected in the recent experimental run with the argon beam are also presented.
πJ/ψ − DD̅* potential described by the quark exchange diagram
Authors: Yamaguchi Yasuhiro , Abe Yukihiro , Fukukawa Kenji , Hosaka Atsushi
Published: April 2019

Exotic hadrons reported in the heavy flavor sector have attracted much interest in hadron and nuclear physics. Especially near the thresholds, the hadron-hadron interaction is important to understand these exotic structures. In this talk, the short range πJ/ψ − DD̅* potential whose importance is indicated by the Lattice QCD is studied by the D(*) meson exchange model, and the Born-order quark exchange model. We find the large difference between the results of the D(*) meson exchange and the quark exchange calculations.
Bound states of purely relativistic nature
Authors: Karmanov V.A. , Carbonell J. , Sazdjian H.
Published: April 2019

Two particles interacting by photon exchange, form the bound states predicted by the non-relativistic Schrödinger equation with the Coulomb potential (Balmer series). More than 60 years ago, in the solutions of relativistic Bethe-Salpeter equation, in addition to the Balmer series, were found another series of energy levels. These new series, appearing when the fine structure constant α is large enough (α > π/4), are not predicted by the Schrödinger equation. However, this new (non-Balmer) states can hardly exist in nature, since in order to create a strong e.m. field with α > π/4 a point-like charge Z > 107 is needed. The nuclei having this charge, though exist starting with bohrium, are far from to be point-like.

In the present paper, we analyze the more realistic case of a strong interaction created by exchange of a massive particle. It turns out that in the framework of the Bethe-Salpeter equation this interaction still generates a series of new relativistic states, which are similar to those of the massless exchange case, and which are absent in the Schrödinger equation. The properties of these solutions are studied. Their existence in nature seems possible.
Hadron production in pp and AA collisions at mid-rapidity within self-similarity approach
Authors: Lykasov Gennady , Malakhov Alexander
Published: April 2019

The self-consistent approach based on similarity of inclusive spectra of hadrons produced in pp and AA collisions is reviewed. We present its modification due to the quark-gluon dynamics to describe the inclusive spectra of hadrons produced in pp collision as a function of the transverse momentum pt at mid-rapidity. The extension of this approach to analyze the pion pt-spectra produced in AA collision at high and middle energies and mid-rapidity is given. A satisfactory description of experimental data on these spectra in pp and AA collisions within the offered approach is shown.
Describing phase transitions in field theory by self-similar approximants
Authors: Yukalov V.I. , Yukalova E.P.
Published: April 2019

Self-similar approximation theory is shown to be a powerful tool for describing phase transitions in quantum field theory. Self-similar approximants present the extrapolation of asymptotic series in powers of small variables to the arbitrary values of the latter, including the variables tending to infinity. The approach is illustrated by considering three problems: (i) The influence of the coupling parameter strength on the critical temperature of the O(N)-symmetric multicomponent field theory. (ii) The calculation of critical exponents for the phase transition in the O(N)-symmetric field theory. (iii) The evaluation of deconfinement temperature in quantum chromodynamics. The results are in good agreement with the available numerical calculations, such as Monte Carlo simulations, Padé-Borel summation, and lattice data.
Hunting for QCD strings in e+e−-annihilation
Authors: Kozhevnikova Marina , Oganesian Armen , Teryaev Oleg
Published: April 2019

We develop a new mathematical method of extraction of nonperturbative corrections in QCD. The main attention is directed to the study of dimension 2 operator and its properties. The ordinary perturbation theory (PT) and analytical perturbation theory (APT) are used. The D-function is explored in dependence on both Q2 and Borel parameter M2. It is shown that the C2 coeffcient of the dimension 2 operator is negative and its compatibility to zero depends on choice of PT or APT and can vary in chosen ranges of M2. The strong (anti)correlation between C2 and gluon condensate found previously is confirmed.
Strongly intensive fluctuations and correlations in ultrarelativistic nuclear collisions in the model with string fusion
Authors: Kovalenko Vladimir
Published: April 2019

The several types of strongly intensive correlation variables are studied in nuclear collisions at LHC energy. These quantities are expected not to depend on centrality class width. They have been calculated in the dipole-based parton-string Monte Carlo model with string fusion. The centrality dependence of the mean transverse momentum correlation coefficient and strongly intensive quantity Σ between multiplicity and PT have been obtained. Dynamical charge fluctuation vdyn has been also calculated and compared with experimental data. It is shown that string fusion improves agreement with the experiment.
Anisotropic flow measurements from RHIC to SIS
Authors: Taranenko Arkadiy
Published: April 2019

Relativistic heavy-ion collisions provide a unique opportunity to study the expansion dynamics and the transport properties of the produced strongly interacting matter. This article reviews the recent results of anisotropic flow measurements for collision energies from $$\sqrt {s{\rm{NN}}} = 200$$ to 2 GeV.
Determination of centrality in nucleus-nucleus collisions at the MPD/NICA installation
Authors: Kurepin A. , Litvinenko A. , Litvinenko E.
Published: April 2019

Measurement of the number of spectators in nucleus-nucleus collisions could be used to determine the number of nucleons participating in the interaction, i.e. get information about collision centrality. However, at energies of the NICA collider energy resolution of the forward hadron calorimeter is insufficient for separation of the amplitudes corresponding to different number of spectators. Uncertainty in the number of spectators leads to a large error in determining the centrality. For central events inaccuracy in determining the collision parameter is about 40%, for peripheral ones, no better than 30% at a beam energy of 2.5 A×GeV. The multiplicity scintillator detector will allow to obtain more accurate data. A certain method is proposed for determining the centrality, taking into account the real MPD installation geometry.
Σ hyperons in nuclear collisions at energy of few GeV/c
Authors: Zhigareva Natalia , Stavinskiy Alexey
Published: April 2019

The perspectives of identifying and studying the mechanisms of Σ hyperons production (isotopic and charged ratios) at the Nuclotron are discussed. The study of ion-ion interactions at few GeV/c per nucleon energy is interesting for searching new a phenomena and phase transitions at high baryonic densities and moderate temperatures of nuclear matter. In this paper, the possible extension of physical program of the planned measurements is considered.
Emission of high energy particles in heavy ion collisions and a non-equilibrium equation of state
Authors: D’yachenko Alexander T. , Mitropolsky Ivan A.
Published: April 2019

A hydrodynamic approach with a non-equilibrium equation of state is used to describe the collisions of heavy ions at medium and intermediate energies. In the development of this approach, with the inclusion of nuclear viscosity effects and the introduction of an amendment to the microcanonical distribution, the double differential cross sections of proton emission in collisions of different nuclei are calculated, which are in agreement with the available experimental data on the emission of high-energy particles, including the cumulative spectral region.
Cross sections of nuclear isomers from the interaction of protons with the thin thorium target
Authors: Holomb R.R. , Tari S.A. , Katovsky K. , Haysak I. , Adam J. , Brudanin V.B. , Vespalec R. , Vrzalova J. , Zavorka L. , Zeman M. , Karaivanov D.V. , Solnyshkin A.A. , Philosophov D.V. , Khushvaktov J. , Tsupko-Sitnikov V.M.
Published: April 2019

The paper shows the results of experimental gamma spectra obtained with a thorium 232Th target and an aluminum collector irradiated at the JINR Synchrocyclotron with the internal beam of energies of 100 and 600 MeV. For 232Th there were identified 258 and 222 gamma lines that belong to 45 and 55 nuclides, respectively. For Al - 238, 330 lines and 81, 119 nuclides, respectively. The cross sections of fragmentation of the 232Th and Al nuclei under the interaction with protons 100 and 600 MeV was determined. A comparison of the obtained cross sections of the reaction with theoretical calculations was performed.
Relativistic density functional for nuclear matter
Authors: Gmuca Stefan , Petrík Kristian , Leja Jozef
Published: April 2019

In the present work, we have mapped the exchange Fock contributions from the Dirac–Hartree–Fock (DHF) approach for nuclear matter onto the direct Hartree terms. This results in the relativistic mean field (RMF) model with the density dependent couplings. The density dependence of the effective coupling constants thus reflects the exchange correlations. The exchange part of an energy density of the linear DHF model in dense matter is evaluated in a parameter-free closed form and, after the rearrangement of the terms, expressed as density functional.
Hadronic contribution of light by light scattering in the energy spectrum of muonic hydrogen
Authors: Dorokhov A. E. , Martynenko A. P. , Martynenko F. A. , Radzhabov A. E.
Published: April 2019

The contribution from scalar meson (S) exchange to the potential of the muon-proton interaction in muonic hydrogen induced by the scalar meson coupling to the two photon state is calculated. An estimate of transition form factor S → γγ is given on the basis of the quark model and experimental data on the decay widths $${\Gamma _{S\gamma \gamma }}$$. It is shown that scalar meson exchange contribution to the Lamb shift in muonic hydrogen ∆ELs(2P – 2S) is large and important for a comparison with precise experimental data.
Prediction of the particle production in pp collisions with the MPD detector at NICA collider
Authors: Shtejer K.
Published: April 2019

The proton-proton collisions have been extensively used as a baseline reference for nucleus-nucleus collisions. In this work, Monte Carlo simulations of inelastic head-on pp interactions at $\sqrt s = 6 - 25\,{\rm{GeV}}$ were performed to study the possibilities of the Multi–Purpose Detector (MPD) to register data from small systems at the energy range of NICA. For that purpose the Monte Carlo models EPOS 1.99 and UrQMD 3.4 were used as event generators to analyse the charge particle yield from pp collisions in the framework of MpdRoot. The production of protons, pions and kaons from pp collisions was studied through their mean multiplicity, rapidity spectra and particle ratios as function of the collision energy. The yield of Λ hyperons was also estimated by means of pure Monte Carlo and the reconstruction of the simulated data in MPD. The comparison with recent data from NA61/SHINE experiment is presented.
Event reconstruction in the BM@N experiment
Authors: Batyuk P. , Baranov D. , Merts S. , Rogachevsky O.
Published: April 2019

In the paper, the main accent is put on development of software to be used in the BM@N experiment. The experiment is considered as a first step towards a realization of fixed target program at the NICA complex. A brief description of software used for reconstruction of track parameters in the inner tracker of the experiment is presented. The alignment procedure in automatic mode was made using the Millepede package fully integrated in the software. The obtained results illustrate a quality assurance of alignment performed using existing experimental data from experimental runs and recent results, including methodological ones from a tracking procedure, which were used for event reconstruction in the inner tracker. The importance of a precise geometry description and a realistic detector response via micro-simulations done for the GEM part of the inner tracker used for processing experimental data is emphasized. Our recent progress in this activity is discussed.
Poincaré-covariant quark model of electroweak light mesons decays
Authors: Andreev Viktor , Haurysh Vadzim
Published: April 2019

The procedure for obtaining the radiative decay constants of pseudoscalar and vector unflavored mesons in point–form of Poincaré-invariant quantum mechanics is presented. In the course of the work the authors determine the remaining parameters from V → Pγ and P → Vγ experimental decay value, using the obtained earlier parameters of the model for light (u, d and s) quarks. As a result, the mixing angles for pseudoscalar and vector meson sector were obtained taking into account gluonium content for η – η′ meson sector.
Reaction of two pion production pd → pdππ in the resonance region
Authors: Uzikov Yuriy , Tursunbayev Nurbek
Published: April 2019

The ANKE@COSY data on the reaction of two-pion production in the GeV region are analyzed within the theoretical model by Platonova and Kukulin. The model includes excitation of the dibaryon resonance DIJ = D03(2380) with the spin J = 3 and isospin I = 0 observed by the WASA@COSY in the reaction pn → dπ0π0, and its decay D03 → D12 + π → d + π + π, where D12(2150) is another dibaryon resonance. Distributions on the invariant masses of the final dππ and ππ systems are calculated.
Deuteron beam polarimeter at Nuclotron internal target
Authors: Skhomenko Ya.T. , Ladygin V.P. , Gurchin Yu.V. , Isupov A.Yu. , Janek M. , Karachuk J.-T. , Khrenov A.N. , Kurilkin P.K. , Livanov A.N. , Piyadin S.M. , Reznikov S.G. , Terekhin A.A. , Tishevsky A.V. , Averyanov A.V. , Belov A.S. , Chernykh E.V. , Enache D. , Fimushkin V.V. , Krivenkov D.O. , Vnukov I.E. , Volkov I.S.
Published: April 2019

The current deuteron beam polarimetry at the Nuclotron is provided by the Internal Target polarimeter based on the use of the asymmetry in dpelastic scattering at large angles in the cms at 270 MeV. The upgraded deuteron beam polarimeter has been used to obtain the vector and tensor polarizations during 2016/2017 runs for the DSS experimental program. The polarimeter has been also used to tune the polarized ion source parameters for 6 different spin modes. The data analysis has been performed using the developed software based on C++ language and ROOT5 library
VME–based DAQ system for the Deuteron Spin Structure setup at the Nuclotron internal target station
Authors: Isupov Alexander
Published: April 2019

The new powerful VME–based data acquisition (DAQ) system has been designed for the Deuteron Spin Structure setup [1] placed at the Nuclotron Internal Target Station [2]. The DAQ system is built using the netgraph–based data acquisition and processing frameworkngdp[3, 4]. The software dealing with VME hardware is a set ofnetgraphnodes in the form of the loadable kernel modules. The specific for current implementation nodes are described, while specific software utilities for the user context are the following. Theb2r(binary–to–ROOT) server converts raw data into per trigger and per accelerator spill representations, which are based on C++ classes derived from theROOTframework [5] ones. This approach allows us to generalize the code for histograms filling and polarization calculations. Theb2roptionally storesROOTevents asROOTTTree in file(s) on HDD, and supports the design of some express offine. ThehistGUIsoftware module provides an interactive online access for human operator to histograms filled by ther2h(ROOT–to–histograms) server, which obtains theROOTevent representations fromb2r. Ther2hsupports the calculation and histograming of runtime configurable variables as well as raw data variables, and optionally storesROOThistograms in file(s) on HDD. Since the spin studies at the Nuclotron require fast and precise determination of the deuteron and proton beam polarization, the polarization calculator software module is introduced. This calculator based on runtime configurabler2hcode allows us to compute polarization values online and integrate them into the Web–based scheme of representation and control of the polarimeters [6, 7].
Dp breakup reaction investigation under specific kinematic configurations at ITS of the Nuclotron
Authors: Janek M. , Averyanov A.V. , Chernykh E.V. , Enache D. , Gurchin Yu.V. , Isupov A.Yu. , Mezhenska O. , Karachuk J.-T. , Khrenov A.N. , Krivenkov D.O. , Kurilkin P.K. , Ladygin V.P. , Ladygina N.B. , Livanov A.N. , Piyadin S.M. , Reznikov S.G. , Skhomenko Ya.T. , Tarjanyiova G. , Terekhin A.A. , Tishevsky A.V. , Uesaka T. , Urban J.
Published: April 2019

Dpbreakup reaction is investigated in the energy range 300-500 MeV at the Internal Target of the Nuclotron using unpolarized and polarized beams by DSS collaboration. The goal of the study is to obtain information about nucleon-nucleon correlations at short distances, non-nucleonic degrees of freedom and relativistic effects. A part of the breakup data at 300 MeV and 400 MeV has been obtained in kinematics where relativistic effects would have a significant contribution.
Fast Denoising of Sonar Image Based on Saliency Detection
Authors: Jin Leilei , Liang Hong , Yang Changsheng
Published: April 2019

Sonar image is inevitably contaminated by noise during the acquisition process, while the noise reduction algorithms with good performance are usually of high time complexity. The human visual attention mechanism usually guides the eyes to salient region and gives priority to those visual information. In view of this, saliency detection based on manifold ranking was introduced into sonar image processing, to divide the image into two parts:salient region and non-significant region. For the salient region with small proportion, block-matching and 3-D filtering (BM3D) algorithm was adopted to reduce noise and protect the main information of the image; for the non-significant background which was not very concerned, high efficiency mean filtering was used. On the collected sonar image data set, the present algorithm was compared with the classic MF and BM3D algorithms through the subjective and 2 objective evaluation indexes. The experimental results show that the efficiency of the present algorithm is much higher than that of BM3D, while the image visual effect is guaranteed, which is satisfied with the real-time application requirement of autonomous underwater vehicles.
Accompagnement des malades dans l’arrivée des nouveaux traitements. L’expérience des services régionaux de l’AFM-Téléthon
Authors: Merret Géraldine
Published: April 2019

La découverte de médicaments pour les maladies neuromusculaires représente une étape cruciale. Leur mise à disposition pour chacun(e) est l’affaire de tous : les patients bien sûr, les Centres de Référence, les Centres de compétences et notre association de malades. Cette véritable révolution créée de nouveaux repères, et un nouveau parcours de soins qui doit bénéficier d’un accompagnement renforcé.
E-Santé et innovation thérapeutique
Authors: Sacconi Sabrina , Mehl Judith , Lenain Claire , Lofaso Frédéric , Taytard Jessica
Published: April 2019

L’utilisation en santé des outils numériques ouvre un large champ d’innovation non médicamenteuse synonyme d’avancées pour les patients, leurs familles et les professionnels de santé, notamment en matière de suivi respiratoire, crucial pour les maladies neuromusculaires. Reste à surmonter des problématiques spécifiques, notamment éthiques.
Quel suivi pour les traitements innovants ?
Authors: Campana-Salort Emmanuelle , Espil-Taris Caroline , Prigent Hélène , de Antonio Marie , Lebrun-Vignes Bénédicte , Tiffreau Vincent , Honnet Géraldine
Published: April 2019

Suivre les bénéfices et la tolérance d’une thérapie innovante constitue un exercice relativement récent dans le champ des maladies neuromusculaires. Fonction respiratoire, capacités musculaires et fonctionnelles, qualité de vie, effets indésirables, pour chaque paramètre à évaluer s’esquisse un panel de mesures idéales.
Mathematical modeling of temperature effect on algal growth for biodiesel application
Authors: Zakir Hossain S.M. , Al-Bastaki Nader , Alnoaimi Abdulla Mohamed A. , Ezuber Husny , Razzak Shaikh A. , Hossain Mohammad M.
Published: April 2019

Microalgae biomass is promising feedstock for the industrial production of biodiesel. Hence, research and development are required in various domains especially optimizations of growth conditions including temperature effect for mass scale operation (production of biomass, harvesting, extraction of lipid, etc). Since in middle east region, seasonal temperature variation and more rapid daily fluctuations are amenable to alter the growth kinetics of microalgae in outdoor culture and hence affect algae biomass production efficiency. Therefore, in this study, a mathematical model was developed to calculate how the algae sp. (Chlorella kessleri) will react at different temperatures. The model integrates Monod model and Arrhenius equation, and as such it describes the relationship of algal growth rate with culturing temperature and limiting nutrient concentration. The apparent activation energy and pre-exponential factors were calculated to be 2537 cal/mol and 0.0077 day−1, respectively. The developed models could be useful to anticipate the effective impacts of temperature on outdoor algae culture.
Highly Efficient, Catalyst-Free, Diastereoselective, Diversity-Oriented Synthesis of Dihydrocoumarin–Pyrrolidine–Spirooxindoles Bearing Three Contiguous Stereocenters
Authors: Zuo Xiong , Chen Shuang , Xu Sheng-Wen , Chang Shun-Qin , Liu Xiong-Li , Zhou Ying , Yuan Wei-Cheng
Published: April 2019

A new methodology has been developed for the highly efficient diastereoselective construction of dihydrocoumarin–pyrrolidine–spirooxindole collections via a domino Michael/annulation reaction of 3-isothiocyanato oxindoles and coumarins under catalyst-free conditions. The resulting biologically important molecules bearing three pharmacophores and three contiguous stereocenters were obtained in up to 92% yield and >20:1 dr. It is noteworthy that utilization of a carboxylic acid activation/decarboxylation strategy represents an efficient approach for the domino Michael/annulation reaction of the chemically inert coumarin moiety. This protocol could expand candidate libraries, that will benefit the requirement for new bioactive molecules.
Operative Management of Anastomotic Leaks after Colorectal Surgery
Authors: Saur Nicole , Paulson E.
Published: April 2019

Anastomotic leak is associated with increased morbidity and mortality after colorectal surgery. Although surgical techniques have improved over time, anastomotic leak is still a reality in colorectal surgery with rates ranging from as low as 1% for low-risk anastomoses, such as enteroenteric or ileocolic, to 19% for high-risk coloanal anastomoses. There are many varied risk factors for anastomotic leak. However, many of the risk factors have not been definitively proven in high-quality studies. Presumably, risk factors are cumulative and every effort should be made to optimize modifiable risk factors in the perioperative period. Treatment of anastomotic leak should start with the determination of patient stability followed by resuscitation and diagnostic imaging or operative exploration. Operative findings will dictate surgical approach with the goal of controlling sepsis and stabilizing the patient. If nonoperative treatment is undertaken, close patient monitoring is necessary to ensure control of sepsis and that intervention is undertaken if the clinical picture changes. Early intervention at each stage is key to decreasing the morbidity of anastomotic leak.
Overlooked Long-Term Complications of Colorectal Surgery
Authors: Giglia Matthew , Stein Sharon
Published: April 2019

While colorectal surgery has been documented to have some of the highest complication rates in the surgical field, some of the more common, functional complications are often overlooked in the literature and in discussion with patients. Urinary, sexual, and defecatory dysfunction are common after colorectal surgery, especially after pelvic dissections, and may severely impact the postoperative quality of life for patients. These complications include urinary retention, erectile dysfunction, retrograde ejaculation, dyspareunia, infertility, and low anterior resection syndrome. The majority is rooted in autonomic nerve damage, both sympathetic and parasympathetic, that occurs during mobilization and resection of the sigmoid colon and rectum. While not all of these postoperative complications are preventable, treatment strategies have been developed to ameliorate the impact on quality of life. Given the high incidence and direct effect on patients, clinicians should be familiar with the etiology, prevention, and treatment strategies of these complications to provide the highest quality of care.
Autoimmune Progesterone Dermatitis: A Case Report
Authors: Özdemir Özhan , Yahşi Gözde Girgin , Atalay Cemal Reşat
Published: April 2019

Introduction Autoimmune progesterone dermatitis (APD) is a rare autoimmune dermatosis characterized by recurrent cutaneous and mucosal lesions during the luteal phase of the menstrual cycle that disappear some days after the menses.

Case Report A 34-year-old primipara woman with no significant past medical history and no prior exogenous hormone use, who presented with cyclic skin eruptions starting 1 year after the delivery. The lesions occurred ∼ 6 days before the menses and disappeared in between 1 and 2 days after the menstruation ceased. The patient was diagnosed after a positive response to an intradermal test with progesterone and was successfully treated with combined oral contraceptives. The skin eruptions have not returned since the initiation of this therapy.

Conclusion Dermatologists, gynecologists, and obstetricians should be aware of this rare entity. Furthermore, if this condition is suspected, a thorough history taking on the menstrual cycle and results of the intradermal progesterone test are mandatory.
Accuracy in Determining Canal Flare Index Using Different Radiographical Positions for Imaging Canine Femurs
Authors: de Andrade Caroline , Minto Bruno , Dreibi Rafael , Diogo Lúcia , Kawamoto Fernando , Franco Guilherme , Uscategui Ricardo , Dias Luís
Published: April 2019

Objective The aim of this study was to compare in vitro accuracy of femoral measurements obtained from different radiographical positions with actual femoral anatomical dimensions in dogs.

Materials and Methods Craniocaudal projections of the femur in ventrodorsal position, standard craniocaudal radiographical (SR) and craniocaudal radiography with horizontal radiographical beam (HR), in addition to anatomical macroscopic measurements (A), were obtained from 45 femurs from 23 canine cadavers, for calculation of the canal flare index (CFI). The differences between the radiographical positions and 95% limits of agreement (LOA) between the CFI-SR, CFI-HR and CFI-A were evaluated by the Bland–Altman method.

Results The standard craniocaudal radiograph provided an approximate dimension of the proximal femoral morphology (mean difference: 0.121 ± 0.391) with a different CFI value (p = 0.0341) from CFI-A. The craniocaudal radiograph taken using a horizontal beam provided greater accuracy (mean difference: 0.087 ± 0.42) in our study.

Clinical Significance The craniocaudal projection using a horizontal radiographical beam was more accurate than the standard craniocaudal projection for measurement of the true anatomical dimensions of the canine femur, minimizing the influence of the technique on the CFI values.
Nonsurgical Chin and Jawline Augmentation Using Calcium Hydroxylapatite and Hyaluronic Acid Fillers
Authors: Moradi Amir , Shirazi Azadeh , David Roy
Published: April 2019

The shape of the jawline from the mandibular angle to its most forward point at the chin has a profound effect on an individual's appearance and is an area of concern for many seeking esthetic procedures. Dermal filler injections alone or in combination with other modalities, such as skin tightening energy devices, allow enhancement of the jawline while avoiding the need for surgical procedures. The authors introduce new anatomical zones and nomenclature to enhance safety and outcome when enhancing the jawline. Cadaver dissections were performed to better understand landmarks and potential risks and a topographic guide proposed to assist clinicians to create an esthetically pleasing jawline. Techniques for jawline rejuvenation with calcium hydroxylapatite (CaHA) and high G prime hyaluronic acid (HA) fillers are described. When considered as an esthetic unit, the jawline can be broken down into masseteric, buccal, and mental zones, each with their own injection protocols and safety considerations. Dermal fillers suitable for jawline rejuvenation include either CaHA with or without integral lidocaine, a high G prime HA filler, or a hybrid mixture of CaHA and HA, depending on the desired esthetic outcome and the individual's needs. Small volumes of product per injection point achieve the most natural esthetic outcome and minimize serious adverse events. With these techniques, the angle of the mandible is better defined, the pre- and postjowl hollows are filled, and as a result the jawline appears visibly straighter. CaHA and high G prime HA fillers are effective nonsurgical treatments for redefining the mandibular angle and straightening the contour of the jaw. For optimal results, the jawline should be considered as an esthetic unit and careful consideration paid to anatomical landmarks that influence efficacy and safety.
Clinical and Anatomical Aspects of Anterior Dislocation of the Pisiform Bone
Authors: Rueff-Barroso Carlos Romualdo , Delpupo Fernanda Vieira Botelho , Fazan Valéria Paula Sassoli , Nascimento Sérgio Ricardo Rios , Nunes Lerud Frosi , Montenegro Rudi Natalli , Kriger Jorge Luiz , Barroso Bernardo Garcia
Published: April 2019

Introduction The pisiform bone is the fourth bone of the proximal row of the carpal bones, and it is located in the tendon of the flexor carpi ulnaris muscle, being considered a sesamoid bone. Traumatic dislocation of the pisiform bone is a rare condition, which usually results from a trauma in dorsal flexion of the wrist. Its treatment can be conservative or surgical, ending or not with the removal of the pisiform bone.

Objective To report a case of a child who fell from his own height and presented wrist pain, diagnosed with dislocation of the pisiform bone. We emphasize the importance of anatomy knowledge in the evaluation of wrist trauma.

Case Report The anamnesis confirmed that the fall occurred with the wrist in hyperextension. The physical examination showed a slight limitation of movement due to pain. Radiographic exams and a computed tomography (CT) scan of the wrist were performed, in which an anterior deviation/luxation of the pisiform bone was evidenced. A conservative treatment with plaster immobilization for analgesia was performed for 1 week. As there were no symptoms and no signs of trauma consistent with the images, such as edema and local ecchymosis, in addition to the early complete disappearance of pain, the responsible team proposed the hypothesis of asymptomatic chronic dislocation of the pisiform bone.

Conclusion Imaging exams in orthopedic traumatology are fundamental for an accurate diagnosis. Nevertheless, they must be associated with knowledge of the anatomy to correlate the image findings with the anamnesis, leading to a better understanding of silent, asymptomatic, and preexisting conditions in the clinical practice.
Optimizing the Chin and Jawline Appearance: Does Surgery or Injection Make Sense?
Authors: Chin Oliver , Sykes Jonathan
Published: April 2019

The chin is a crucial landmark and mandates careful consideration for facial appearance. Optimal chin appearance requires evaluation and treatment in three dimensions: anteroposterior, transverse, and vertical planes. The optimization of chin deficiencies requires understanding of bony anatomy as well as the relationship of the adjacent facial structures including the lip, teeth, and nose. The practitioner should be familiar with techniques in injection, placement of alloplastic implants, as well bony genioplasty.
Application of ICF-CY Core Sets in Children with Spastic Cerebral Palsy
Authors: Mukhtiar Khairunnisa , Ibrahim Shahnaz , Ahmed Mukhtiar
Published: April 2019

In this study, we applied brief age-specific core sets of international classification of functioning, disability, and health in children and youth (ICF-CY) in children with spastic cerebral palsy (CP). It was a descriptive cross-sectional study. One hundred children with spastic CP, age range 1 to 6 years, were included in the study. Thirty-one age-specific brief ICF core sets were applied to children with spastic CP to assess their functional status. Common areas of impairments in children with spastic CP were the body functions and activities and participation. Environmental factors were also a major limitation in the care of CP. The application of ICF core sets provides a novel and standardized approach in describing the functional profile of children with CP. Through application of these core sets, we can standardize the functional assessments of CP worldwide.
Electrohydrodynamic gas flow in a positive corona discharge
Authors: Moreau Eric , Audier Pierre , Orriere Thomas , Benard Nicolas
Published: April 2019

When a sufficient high voltage is applied between a point and a plate in atmospheric air, a corona discharge is ignited and an electrohydrodynamic (EHD) force can be produced, resulting in an ionic wind of a few meters per second flowing from the point toward the plate. In this study, we aimed at characterizing the ionic wind EHD flow produced by DC positive point-to-plate corona discharges. This is realized with the help of a high-speed particle image velocimetry system and Schlieren visualizations. The obtained measurements allowed us to characterize precisely the ionic wind vs time, as well as its dynamics when the discharge is switched on. We highlighted the key role of the breakdown streamers in the ionic wind hydrodynamics. We discovered that, in the presence of breakdown streamers, the positive corona discharge produces a pulsed ionic wind whose frequency corresponds to the frequency of the current pulses. To explain this EHD result, we investigated and showed that each single current pulse is composed of several streamers or several branches of one streamer, this phenomenon being at the origin of a space charge mainly composed of positive ions. Finally, we highlighted that when the steady breakdown streamer regime takes place, the time-averaged current becomes greater than the theoretical values given by Townsend's law since it evolves nearly linearly with the high voltage.
Data sampling scheme for reproducing energies along reaction coordinates in high-dimensional neural network potentials
Authors: Okamoto Yasuharu
Published: April 2019

We propose a data sampling scheme for high-dimensional neural network potentials that can predict energies along the reaction pathway calculated using the hybrid density functional theory. We observed that a data sampling scheme that combined partial geometry optimization of intermediate structures with random displacement of atoms successfully predicted the energies along the reaction path with respect to five chemical reactions: Claisen rearrangement, Diels–Alder reaction, [1,5]-sigmatropic hydrogen shift, concerted hydrogen transfer in the water hexamer, and Cornforth rearrangement.
Tagged-moiety viewpoint of chemical reaction networks
Authors: Sabatino Andrea , Frezzato Diego
Published: April 2019

In this work we consider mass action chemical reaction networks, either closed or open, and focus on the hopping path that a tagged moiety makes from molecule to molecule because of the occurrence of the reactions. We develop the tool for simulating the stochastic paths by means of a Gillespie-like algorithm and provide examples of the master equation counterpart for simple archetype problems of general interest. Both stationary and transient conditions are taken into account. An explanatory case is adopted to illustrate the approach.