bluuebunny/crossref_metadata_2025 huggingface dataset:
Coherence of Microcystis species revealed through population genomics
Authors: Pérez-Carrascal Olga M , Terrat Yves , Giani Alessandra , Fortin Nathalie , Greer Charles W , Tromas Nicolas , Shapiro B Jesse
Published: July 2019

Microcystis is a genus of freshwater cyanobacteria, which causes harmful blooms in ecosystems worldwide. Some Microcystis strains produce harmful toxins such as microcystin, impacting drinking water quality. Microcystis colony morphology, rather than genetic similarity, is often used to classify Microcystis into morphospecies. Yet colony morphology is a plastic trait, which can change depending on environmental and laboratory culture conditions, and is thus an inadequate criterion for species delineation. Furthermore, Microcystis populations are thought to disperse globally and constitute a homogeneous gene pool. However, this assertion is based on relatively incomplete characterization of Microcystis genomic diversity. To better understand these issues, we performed a population genomic analysis of 33 newly sequenced genomes mainly from Canada and Brazil. We identified 17 Microcystis clusters of genomic similarity, five of which correspond to monophyletic clades containing at least three newly sequenced genomes. Four out of these five clades match to named morphospecies. Notably, M. aeruginosa is paraphyletic, distributed across 12 genomic clusters, suggesting it is not a coherent species. A few clades of closely related isolates are specific to a unique geographic location, suggesting biogeographic structure over relatively short evolutionary time scales. Higher homologous recombination rates within than between clades further suggest that monophyletic groups might adhere to a Biological Species-like concept, in which barriers to gene flow maintain species distinctness. However, certain genes—including some involved in microcystin and micropeptin biosynthesis—are recombined between monophyletic groups in the same geographic location, suggesting local adaptation.
Role of p110a subunit of PI3-kinase in skeletal muscle mitochondrial homeostasis and metabolism
Authors: Li Mengyao Ella , Lauritzen Hans P. M. M. , O’Neill Brian T. , Wang Chih-Hao , Cai Weikang , Brandao Bruna B. , Sakaguchi Masaji , Tao Rongya , Hirshman Michael F. , Softic Samir , Kahn C. Ronald
Published: July 2019

Skeletal muscle insulin resistance, decreased phosphatidylinositol 3-kinase (PI3K) activation and altered mitochondrial function are hallmarks of type 2 diabetes. To determine the relationship between these abnormalities, we created mice with muscle-specific knockout of the p110α or p110β catalytic subunits of PI3K. We find that mice with muscle-specific knockout of p110α, but not p110β, display impaired insulin signaling and reduced muscle size due to enhanced proteasomal and autophagic activity. Despite insulin resistance and muscle atrophy, M-p110αKO mice show decreased serum myostatin, increased mitochondrial mass, increased mitochondrial fusion, and increased PGC1α expression, especially PCG1α2 and PCG1α3. This leads to enhanced mitochondrial oxidative capacity, increased muscle NADH content, and higher muscle free radical release measured in vivo using pMitoTimer reporter. Thus, p110α is the dominant catalytic isoform of PI3K in muscle in control of insulin sensitivity and muscle mass, and has a unique role in mitochondrial homeostasis in skeletal muscle.
Wireless organic electronic ion pumps driven by photovoltaics
Authors: Jakešová Marie , Sjöström Theresia Arbring , Đerek Vedran , Poxson David , Berggren Magnus , Głowacki Eric Daniel , Simon Daniel T.
Published: July 2019

The organic electronic ion pump (OEIP) is an emerging bioelectronic technology for on-demand and local delivery of pharmacologically active species, especially targeting alkali ions, and neurotransmitters. While electrical control is advantageous for providing precise spatial, temporal, and quantitative delivery, traditionally, it necessitates wiring. This complicates implantation. Herein, we demonstrate integration of an OEIP with a photovoltaic driver on a flexible carrier, which can be addressed by red light within the tissue transparency window. Organic thin-film bilayer photovoltaic pixels are arranged in series and/or vertical tandem to provide the 2.5–4.5 V necessary for operating the high-resistance electrophoretic ion pumps. We demonstrate light-stimulated transport of cations, ranging in size from protons to acetylcholine. The device, laminated on top of the skin, can easily be driven with a red LED emitting through a 1.5-cm-thick finger. The end result of our work is a thin and flexible integrated wireless device platform.
Localisation of weakly interacting bosons in two dimensions: disorder vs lattice geometry effects
Authors: González-García Luis A. , Caballero-Benítez Santiago F. , Paredes Rosario
Published: July 2019

We investigate the effects of disorder and lattice geometry against localisation phenomena in a weakly interacting ultracold bosonic gas confined in a 2D optical lattice. The behaviour of the quantum fluid is studied at the mean-field level performing computational experiments, as a function of disorder strength for lattices of sizes similar to current experiments. Quantification of localisation, away from the Bose glass phase, was obtained directly from the stationary density profiles through a robust statistical analysis of the condensate component, as a function of the disorder amplitude. Our results show a smooth transition, or crossover, to localisation induced by disorder in square and triangular lattices. In contrast, associated to its larger tunneling amplitude, honeycomb lattices show absence of localisation for the same range of disorder strengths and same lattice amplitude, while also exhibiting partial localisation for large disorder amplitudes. We also conclude that the coordination number z have a partial influence on how fast this smooth transition occurs as the system size increases. Signatures of disorder are also found in the ground state energy spectrum, where a continuous distribution emerges instead of a distribution of sharp peaks proper to the system in the absence of disorder.
Increase in the oxygen stable isotopic composition of water in wine with low ethanol yield
Authors: Akamatsu Fumikazu , Shimizu Hideaki , Kamada Aya , Igi Yukari , Fujii Tsutomu , Goto-Yamamoto Nami
Published: July 2019

The stable isotopic composition of oxygen (δ18O) in wine is often analysed to determine the geographic origin of the wine and the amount of water dilution. However, little is known regarding the effects of two major winemaking techniques (the addition of acid (acidification) and sugar (chaptalization)) on theδ18O value of water in wine. Here we show that acidification and chaptalization have minor direct effects on theδ18O value but indirect effects based on the ethanol yield, which causes isotopic variation of up to 0.6‰. During fermentation,δ18O values increase at low ethanol yields, suggesting that yeast release water with a highδ18O value into wine when consuming sugars. Additionally, the ethanol yield is negatively correlated with the consumption of amino acids by the yeast, indicating that yeast growth decreases the ethanol yield. We therefore identify ethanol yield, which is decreased by the consumption of sugars by yeast for non-alcohol-fermentation processes as a potential factor leading to variations in theδ18O value of water during the winemaking process.
Individual differences in the effect of menstrual cycle on basal ganglia inhibitory control
Authors: Hidalgo-Lopez Esmeralda , Pletzer Belinda
Published: July 2019

Basal ganglia (BG) are involved in inhibitory control (IC) and known to change in structure and activation along the menstrual cycle. Therefore, we investigated BG activation and connectivity patterns related to IC during different cycle phases. Thirty-six naturally cycling women were scanned three times performing a Stop Signal Task and hormonal levels analysed from saliva samples. We found an impaired Stop signal reaction time (SSRT) during pre-ovulatory compared to menses the higher the baseline IC of women. Blood oxygen level dependent (BOLD)-response in bilateral putamen significantly decreased during the luteal phase. Connectivity strength from the left putamen displayed an interactive effect of cycle and IC. During pre-ovulatory the connectivity with anterior cingulate cortex and left inferior parietal lobe was significantly stronger the higher the IC, and during luteal with left supplementary motor area. Right putamen’s activation and left hemisphere’s connectivity predicted the SSRT across participants. Therefore, we propose a compensatory mechanism for the hormonal changes across the menstrual cycle based on a lateralized pattern.
Mannitol-induced gold nanoparticle aggregation for the ligand-free detection of viral particles
Authors: Mi Xue , Lucier Elizabeth M. , Turpeinen Dylan G. , Yeo Eugenia Li Ling , Kah James Chen Yong , Heldt Caryn L.
Published: July 2019

Addition of osmolytes causes viruses-coated AuNPs to aggregate and not protein-coated AuNPs. Ligand-free detection of virus was developed without the need for prior knowledge of the specific virus target.
Rhodamine dye transfer from hydrogel to nanospheres for the chemical detection of potassium ions
Authors: Yang Wei , Zhai Jingying , Xie Xiaojiang
Published: July 2019

Smart hydrogels incorporating various functional nanomaterials are becoming popular tools for chemical sensing.
Bacteria-derived fluorescent carbon dots for highly selective detection ofp-nitrophenol and bioimaging
Authors: Zhang Shengting , Zhang Dongfang , Ding Yafang , Hua Jianhao , Tang Bing , Ji Xiuling , Zhang Qi , Wei Yunlin , Qin Kunhao , Li Bo
Published: July 2019

Schematic of the synthetic route for fluorescent CDs-BC and their applications in the detection ofp-NP and bioimaging.
Comparison of using two different labeling reagents for rapid analysis of triterpenic acids by pre-column derivatization with RP-HPLC-FLD and application to plant samples
Authors: Zeng Zhi , Zhou Wu , Hu Na , Zou Linyou , Bai Bo , Wang Honglun
Published: July 2019

Triterpenic acids (TAs) commonly found in the plant kingdom are one of the most important natural ingredients owing to their various pharmacological activities.
A robust cage-based framework for the highly selective purification of natural gas
Authors: Hu Falu , Huang Pan , Di Zhengyi , Wu Mingyan , Jiang Feilong , Hong Maochun
Published: July 2019

A robust cage-base framework exhibits highly selective purification of natural gas.
A redox-generated biomimetic membrane potential across polypyrrole films
Authors: Nie Xiaoyan , Xiao Tianliang , Liu Zhaoyue
Published: July 2019

An artificial membrane potential was generated through redox-regulating anion distribution on the two sides of a polypyrrole film.
In situ Ga-alloying in germanium nano-twists by the inhibition of fractal growth with fast Li+-mobility
Authors: Yu Zhaoliang , Yuan Long , Wei Yingjin , Li Haibo , Meng Xiangdong , Li Yao , Endres Frank
Published: July 2019

The fractal growth-inhibited Ge0.90Ga0.10 nano-twists exhibit higher Li+ diffusion coefficient than the Ge fractal structures, promising for fast charging/discharging applications.
Tetrahedral chain ordering and low dimensional magnetic lattice in a new brownmillerite Sr2ScFeO5
Authors: Marik Sourav , Gonano Bruno , Veillon Fabien , Bréard Yohann , Pelloquin Denis , Hardy Vincent , Clet Guillaume , Le Breton Jean Marie
Published: July 2019

We report the synthesis, structure and physical properties of a hitherto unreported brownmillerite compound Sr2ScFeO5.
An advanced FeCoNi nitro-sulfide hierarchical structure from deep eutectic solvents for enhanced oxygen evolution reaction
Authors: Jiang Jingyun , Chang Liangyu , Zhao Wancheng , Tian Qingyong , Xu Qun
Published: July 2019

An advanced trimetal FeCoNi-based nitro-sulfide (FeCoNi-NS) hierarchical structure has been synthesized, which exhibits excellent oxygen evolution reaction (OER) performance.
Structure and thermal expansion of the distorted Prussian blue analogue RbCuCo(CN)6
Authors: Boström Hanna L. B. , Smith Ronald I.
Published: July 2019

The structure and thermal expansion of the unusually distorted Prussian blue analogue RbCuCo(CN)6 is discussed.
Phase and morphology controlled polymorphic MnO2 nanostructures for electrochemical energy storage
Authors: Shen Man , Zhu Shi Jin , Liu Xiaoying , Fu Xin , Huo Wang Chen , Liu Xiao Li , Chen Yu Xiang , Shan Qian Yuan , Yao Hong-Chang , Zhang Yu Xin
Published: July 2019

In this work, a series of MnO2 nanostructures with different crystallographic structures, including δ-MnO2 nanotubes and α-MnO2 nanorods, were prepared using polycarbonate membrane as a template.
Vibrationally resolved emission spectra of luminescent conjugated oligothiophenes from anharmonic calculations
Authors: Madsen Diana , Christiansen Ove , Norman Patrick , König Carolin
Published: July 2019

Anharmonic emission band profiles of oligothiophenes computed in a priori chosen reduced vibrational spaces are in good agreement with experiment.
Enhanced thermoelectric performance of monolayer MoSSe, bilayer MoSSe and graphene/MoSSe heterogeneous nanoribbons
Authors: Deng Shuo , Li Lijie , Guy Owen J. , Zhang Yan
Published: July 2019

Monolayer MoSSe, bilayer MoSSe and graphene/MoSSe heterostructure nanoribbons have been simulated to exhibit a high thermoelectric figure of merit.
Determining the structures, acidity and adsorption properties of Al substituted HZSM-5
Authors: Zhang Nan , Liu Chunli , Ma Jinghong , Li Ruifeng , Jiao Haijun
Published: July 2019

Possible Al sites supported by ammonia and pyridine adsorption enthalpies from DFT calculations and experiment.
The chemistry of multi-component and hierarchical framework compounds
Authors: Feng Liang , Wang Kun-Yu , Day Gregory S. , Zhou Hong-Cai
Published: July 2019

This review is expected to provide a library of multi-component hierarchically porous compounds, which shall guide the state-of-the-art design of future porous materials with unprecedented tunability, synergism and precision.
Structural modulation induced by MIIIAmetals in Ba3MQ4X (M = Al, Ga, In; Q = S, Se; X = Cl, Br): an experimental and computational analysis
Authors: Tudi Abudukadi , Han Shujuan , Abudurusuli Ailijiang , Yu Haohai , Yang Zhihua , Pan Shilie
Published: July 2019

The optical properties of Ba3MQ4X (M = Al, Ga, In; Q = S, Se; X = Cl, Br) have been studied and their structures have been compared.
Graphene oxide encapsulated by mesoporous silica for intelligent anticorrosive coating: studies on release models and self-healing ability
Authors: Du Peng , Wang Juan , Zhao Haichao , Liu Guangzhou , Wang Liping
Published: July 2019

The efficient release of benzotriazole from an insulating graphene/mesoporous silica nanoreservoir inspired us to fabricate a bi-layered anticorrosive coating with self-healing ability at the functional level.
Photosystem ratio imbalance promotes direct sustainable H2 production in Chlamydomonas reinhardtii
Authors: Krishna Pilla Sankara , Styring Stenbjörn , Mamedov Fikret
Published: July 2019

Changes in the photosystem I/photosystem II ratio promote sustainable H2 production in C. reinhardtii in a standard TAP medium.
Palladium nanoparticles supported on graphene acid: a stable and eco-friendly bifunctional C–C homo- and cross-coupling catalyst
Authors: Blanco Matías , Mosconi Dario , Tubaro Cristina , Biffis Andrea , Badocco Denis , Pastore Paolo , Otyepka Michal , Bakandritsos Aristides , Liu Zhibo , Ren Wencai , Agnoli Stefano , Granozzi Gaetano
Published: July 2019

Bifunctional graphene acid–Pd nanohybrids catalyse homo- and cross-coupling Suzuki reactions under eco-friendly conditions.
Scale-up biopolymer-chelated fabrication of cobalt nanoparticles encapsulated in N-enriched graphene shells for biofuel upgrade with formic acid
Authors: Zhou Shenghui , Dai Fanglin , Dang Chao , Wang Ming , Liu Detao , Lu Fachuang , Qi Haisong
Published: July 2019

Carboxymethyl cellulose-derived Co nanocatalysts sheathed in N-doped graphene exhibited an excellent catalytic activity for base-free transfer hydrodeoxygenation of vanillin with formic acid.
Tumor spheroid-on-a-chip: a standardized microfluidic culture platform for investigating tumor angiogenesis
Authors: Ko Jihoon , Ahn Jungho , Kim Suryong , Lee Younggyun , Lee Jungseub , Park Dohyun , Jeon Noo Li
Published: July 2019

A standardized microfluidic system based on high-throughput screening for tumor angiogenesis in vitro.
Quantum dot cellular uptake and toxicity in the developing brain: implications for use as imaging probes
Authors: Zhang Mengying , Bishop Brittany P. , Thompson Nicole L. , Hildahl Kate , Dang Binh , Mironchuk Olesya , Chen Nina , Aoki Reyn , Holmberg Vincent C. , Nance Elizabeth
Published: July 2019

Nanometer-sized luminescent semiconductor quantum dots (QDs) have been utilized as imaging and therapeutic agents in a variety of disease settings, including diseases of the central nervous system.
The synthesis of thiol-stabilized silver nanoparticles and their application towards the nanomolar-level colorimetric recognition of glutathione
Authors: Aktara Mt Nasima , Nayim Sk , Sahoo Nandan Kumar , Hossain Maidul
Published: July 2019

The synthesis and characterization of 5-methyl-1,3,4-thiadiazole-2-thiol fabricated silver nanoparticles and their application to detect glutathione.
Hybrid luminescent alginate hydrogels containing lanthanide with potential for acetone sensing
Authors: Zhang Ze-yu , Zhu Han , Xu Quan-qing , Liu Feng-yi , Zhu Ai-xin , Kou Jun-feng
Published: July 2019

Alginate hydrogels containing YVO4–Eu3+have been prepared by using a facile method. These luminescent hydrogels can be used as sensors to detect acetone with quick response and good reversibility.
Plant-mediated synthesis of AgPd/γ-Al2O3 catalysts for selective hydrogenation of 1,3-butadiene at low temperature
Authors: Lu Fenfen , Sun Daohua , Jiang Xia
Published: July 2019

Plant-mediated synthesis of bimetallic AgPd/γ-Al2O3 catalysts for selective hydrogenation of low-temperature 1,3-butadiene was reported.
Impact of the Schiff base ligand substituents on the solid state and solution properties of eleven iron(iii) complexes
Authors: Pogány Lukáš , Brachňaková Barbora , Masárová Petra , Moncol Ján , Pavlik Ján , Gál Miroslav , Mazúr Milan , Herchel Radovan , Nemec Ivan , Šalitroš Ivan
Published: July 2019

A series of novel iron(iii)-Schiff base complexes have been prepared and structurally characterised. Their stereochemical, magnetic and redox properties were correlated with the molecular design of the corresponding N3O2-pentadentate Schiff base ligand.
Green oxidant H2O2 as a hydrogen atom transfer reagent for visible light-mediated Minisci reaction
Authors: Zhao Hong , Li Zhenlong , Jin Jian
Published: July 2019

A metal-free protocol for oxidative coupling of heteroarenes and aliphatic C–H components has been achieved via a radical pathway.
Suppression of platinum sintering on Pt–M/ZSM-22 (M = Ce, La, and Re) catalyst forn-dodecane isomerization
Authors: Ning Qiang , Zhang Huaike , He Yurong , Chen Zhiqiang , Liu Suyao , Ren Jie
Published: July 2019

Ce-modified Pt/ZSM-22 catalyst with slightly increased acidity and electron-deficient Pt exhibits improved isomer selectivity and sintering resistance of Pt inn-dodecane isomerization.
Copper submicrospheres induced by pulsed laser-irradiation with enhanced tribology properties
Authors: Wang Li , Luo Ting , Li Wei , Wei Haoming , Chen Xinchun , Cao Bingqiang
Published: July 2019

Copper submicrospheres prepared by one-step laser irradiation showed excellent friction reduction and self-repairing effects as lubricant additives.
A novel and effective benzo[d]thiazole-based fluorescent probe with dual recognition factors for highly sensitive and selective imaging of cysteine in vitro and in vivo
Authors: Zhu Meiqing , Wu Xiaoqin , Sang Linfeng , Fan Fugang , Wang Lijun , Wu Xiangwei , Hua Rimao , Wang Yi , Li Qing X.
Published: July 2019

Double recognition groups significantly improved the selectivity of a fluorescent probe to Cys in living cells.
Modification of CuCl2·2H2O by dielectric barrier discharge and its application in the hydroxylation of benzene
Authors: Fang Lu , Dong Shiyang , Shi Lei , Sun Qi
Published: July 2019

A DBD plasma converts a homogeneous catalyst CuCl2·H2O into a heterogeneous catalyst CuCl2–DBD by removing some chlorine from CuCl2·H2O.
Luminescence sensing, electrochemical, and magenetic properties of 2D coordination polymers based on the mixed ligands p-terphenyl-2,2′′,5′′,5′′′-tetracarboxylate acid and 1,10-phenanthroline
Authors: Fan Liming , Liu Zhangjie , Zhang Yujuan , Wang Feng , Zhao Dongsheng , Yang Jiandong , Zhang Xiutang
Published: July 2019

Four 2D CPs were constructed and provided platforms to investigate the electrochemical behavior, luminescence sensing of Cr(vi) and pesticides, and magnetic properties.
Turn-on exciplex fluorescence induced by complexation of nonfluorescent pentafluorinated dibenzoylmethanatoboron difluoride with benzene and its derivatives
Authors: Kononevich Yuriy N. , Sazhnikov Viacheslav A. , Belova Anastasia S. , Korlyukov Alexander A. , Volodin Alexander D. , Safonov Andrey A. , Yurasik Georgy A. , Ionov Dmitriy S. , Muzafarov Aziz M.
Published: July 2019

A new pentafluorinated derivative of (dibenzoylmethanato)boron difluoride (5F-DBMBF2) was synthesized and studied as an “off–on” fluorescent probe for benzene derivatives with a reversible detection capability.
Stimulation of bone formation by monocyte-activator functionalized graphene oxidein vivo
Authors: Bordoni Valentina , Reina Giacomo , Orecchioni Marco , Furesi Giulia , Thiele Stefanie , Gardin Chiara , Zavan Barbara , Cuniberti Gianaurelio , Bianco Alberto , Rauner Martina , Delogu Lucia G.
Published: July 2019

Graphene oxide complexed with calcium phosphate nanoparticles enhances bone regeneration through signalling between monocytes and mesenchymal stem cells.
The fabrication of Co:ZnS/CoS2heterostructure nanowires with a superior hydrogen evolution performance
Authors: Yan Shancheng , Wang Ka , Wu Qingxia , Zhou Fei , Lin Zixia , Song Haizeng , Shi Yi
Published: July 2019

The ultrafine Co:ZnS/CoS2heterostructure nanowires with high hydrogen evolution performance by one-step hydrothermal method. The overpotential required to reach a current density of 10 mAcm−2was only 78 mV in 0.5 M H2SO4solution, and the Tafel slope was 56 mV dec−1.
An azine-containing bispillar[5]arene-based multi-stimuli responsive supramolecular pseudopolyrotaxane gel for effective adsorption of rhodamine B
Authors: Qi Li-Hua , Ding Jin-Dong , Ma Xiao-Qiang , Guan Xiao-Weng , Zhu Wei , Yao Hong , Zhang You-Ming , Wei Tai-Bao , Lin Qi
Published: July 2019

A novel supramolecular pseudopolyrotaxane prepared via a bispillar[5]arene-based pseudopolyrotaxane can self-assemble to form a supramolecular pseudopolyrotaxane gel exhibiting multiple stimuli-responsiveness and efficient adsorption of rhodamine B.
MicroRNA-191-5p diminished sepsis-induced acute kidney injury through targeting oxidative stress responsive 1 in rat models
Authors: Qin Yi , Wang Guizhen , Peng Zhiyong
Published: July 2019

There is no effective treatment for septic acute kidney injury (AKI), which is considered a major public health concern in today’s world. Here, we studied the functions of miR-191-5p in septic AKI. MiR-191-5p mimic or mimic control was injected into rats from caudal vein before cecal ligation and puncture (CLP) surgery. Part of kidney tissues was stained by Hematoxylin and Eosin (H&E) for histological examination. The levels of serum cytokines were evaluated using enzyme-linked immunosorbent assay (ELISA). For cell transfection, renal cells were isolated from the kidneys of CLP rat model injected with mimic control and miR-191-5p mimic. With TargetScan prediction, serine/threonine-protein kinase OSR1 was identified as a target of miR-191-5p. Oxidative stress responsive 1 (OXSR1) overexpression vector was transfected into renal cells. Cell viability and apoptosis rate were determined by Cell Counting Kit-8 (CCK-8) and flow cytometry, respectively. We additionally measured the phosphorylation levels of p38 and p65. We found that the injection of miR-191-5p mimic could observably inhibit renal injury scores, and inhibit inflammatory cytokine productions and apoptotic protein levels in septic rats. After being transfected with OXSR1, the apoptosis rates and expressions of B-cell lymphoma-2 (Bcl-2), down-regulated Bax and Cleaved caspase-3 (C caspase-3) indicated overexpressed OXSR1 contributed to cell apoptosis. The up-regulated protein levels of p-p38 and p-p65 may suggest the involvement of p38 MAPK/NF-κB signaling pathway in the functions of OXSR1. Our results showed that the protective effects of miR-191-5p on kidney tissues of septic rats may rely on the repression of OXSR1.
KF‐based estimation of diode turn‐off power loss using datasheet information
Authors: Naseri F. , Farjah E. , Ghanbari T.
Published: July 2019

In this Letter, an effective method for estimation of turn‐off power losses of power diodes using datasheet information is proposed. An effective regression method with non‐linear least‐squares algorithm is used to obtain approximate representations of the reverse‐recovery charge and softness factor of the diode using datasheet information. Kalman Filter (KF) algorithm is then used to accurately acquire the value of diode forward current at the turn‐off instant. Finally, the obtained information is used to estimate the turn‐off power losses with simple calculations, based on approximated reverse‐recovery equations. Despite the simplicity of the proposed technique, the results demonstrate that the estimation error does not exceed 4% in the worst case.
Dual circularly polarised travelling wave slot antenna array
Authors: Chaudhuri Sumantra , Kshetrimayum Rakhesh Singh , Sonkar Ramesh Kumar , Mishra Mohit
Published: July 2019

A series‐fed dual circularly polarised planar slot antenna array is presented. The radiating slots of the antenna are located on the ground plane and are excited by means of a ring‐shaped microstrip line comprising of rectangular sections. A metallic reflector lies underneath the feed network separated by an air‐layer to augment the gain of the antenna. The parameters of a fabricated prototype are measured for validation. Based on the measured data, the antenna is found to have an impedance bandwidth of 1189 MHz which is 18.46% of the centre frequency . Also, the axial ratio (AR) bandwidth is 880 MHz centred at . The inter‐port isolation ranges from 25 to 45 dB and the gain ranges from 8.2 to 9.5 dBic within the AR band. The antenna exhibits beam scanning capability and is therefore suitable for various applications like satellite communication, radiometry and polarimetry.
Data‐driven next destination prediction and ETA improvement for urban delivery fleets
Authors: Zhao Bing , Teo Yon Shin , Ng Wee Siong , Ng Hai Heng
Published: July 2019

In an urban logistics system, predictions of the next destination and estimated time of arrival (ETA) are of paramount importance for efficient resource planning of delivery fleets and for providing a satisfactory client experience. The quality of prediction is limited by the information accessible to individual logistics business entities, and further complicated by the complex urban road system. Data collection under the auspices of smart city initiatives worldwide provides exciting new opportunities to overcome these limitations. In this study, the authors identify two areas of improvement through data‐driven approaches, including a next destination predictor, based on the delivery fleet's historical global positioning system trajectory data using a non‐linear autoregressive neural network, and a road incident detector for real‐time ETA improvement. By comparing a range of machine learning classification algorithms for incident detection, XGBoost has been found to be the most practical choice, due to its performance and efficiency. The proposed framework can be utilised by government authorities who possess such data for better urban planning and providing advanced infrastructure, so as to improve the operational efficiency of the logistics industry.
Self‐regulated DC‐link control of synchronous reluctance motor‐driven solar water pumping system
Authors: Varshney Anshul , Sharma Utkarsh , Singh Bhim
Published: July 2019

This study deals with a two‐stage photovoltaic (PV) array‐fed irrigation pump using a synchronous reluctance (SynREL) motor drive. In this scheme, a boost converter is utilised for harvesting maximum available power from a PV array through an incremental conductance‐based maximum power point tracking algorithm. Here, it feeds power to a voltage source inverter through a DC‐link capacitor. The prime objective of the proposed system is to provide water supply for domestic and irrigation purposes; therefore, to avoid complexity and for increased reliability, the speed/position sensor is eliminated. A speed/position observer is utilised for the estimation of angular position of SynREL motor. A PV feed‐forward term is used to estimate the reference speed, which aids in enhancing the transient behaviour of proposed system. Moreover, the control is inherently resistant to the ageing‐related variation in pump's constant. The applicability of proposed water pumping system is verified through test results, recorded on a developed prototype in the laboratory under varying atmospheric conditions.
Control strategy of wind energy conversion system based on H‐MMC under asymmetrical grid faults
Authors: Rong Fei , Yan Jiajun , Sun Wenlong , Huang Sheng , Wu Qiuwei
Published: July 2019

This study proposes a topology of wind energy conversion system based on hexagonal modular multilevel converter (H‐MMC), which can connect the wind turbine and the AC grid with one stage conversion. It has the advantages of low power losses, low ripple of capacitor voltage and transformer‐less grid connection. The operation principle of the proposed topology is analysed in detail. Then, the positive and negative sequence control method is proposed to eliminate the second harmonics in the output power of H‐MMC under asymmetrical grid faults. The double proportional resonant (PR) controller is proposed to track arm current references without steady error. The effectiveness of the proposed topology and its control method are verified by simulations and hardware in loop tests.
Control strategy of PV‐fed, grid‐interfaced, seven‐level T‐type MLI for distributed power generation
Authors: Sinha Akanksha , Jana Kartick Chandra , Das Madan Kumar
Published: July 2019

The major concern with renewable sources of energy, feeding the distributed power generation system, is the power quality, reliability and efficiency of the system. This study proposes a novel topology comprising single‐phase, seven‐level, grid‐connected photovoltaic‐fed (PV) inverters in parallel. An important expediency of connecting multilevel inverters (MLIs) in parallel is that the failure of any source or the MLI module itself will never stop the overall generation, leading to improved efficiency and reliability of the system. This study also incorporates a novel controller comprising of two DC and an AC controller that independently controls the DC‐link voltage of PV system and AC‐side voltage so as to inject a pure sinusoidal current at unity power factor into the grid. Also, the AC controller discussed here is self‐synchronising, i.e. aloof of phase‐locked loop. The power mismatch problem that basically arises due to partial shading conditions in PV system has also been discussed. The MATLAB/Simulink‐based proposed two seven‐level grid‐connected inverters in parallel are modelled and simulation results are presented. An experimental prototype of the PV‐fed grid‐connected system comprising two seven‐level inverters in parallel is developed and tested to validate the simulation results.
GaN‐based split phase transformer‐less PV inverter with auxiliary ZVT circuit
Authors: Xia Yinglai , Roy Jinia , Ayyanar Raja
Published: July 2019

This paper explores performance enhancement of the common ground dynamic dc‐link (CGDL) inverter for single phase photovoltaic (PV) applications by a combination of gallium nitride (GaN) devices, split phase topology, coupled inductors, and zero voltage transition (ZVT) scheme. The CGDL inverter has the inherent advantage of minimised dc‐link capacitance and negligible leakage current due to the common ground configuration, but its reported efficiency was usually lower because of the higher dc‐link voltage used for the reduction of decoupling capacitance to a great extent. To solve the efficiency problem, in this study, a soft switching circuit is proposed for the first stage, while a coupled inductor integrated magnetics is incorporated in the second stage to reduce inductor loss, volume, and cost. Both of these topological improvements combined with the use of GaN devices facilitate in achieving high efficiency without compromising converter power density. Extensive experimental results are provided from a GaN based 1 kVA hardware prototype to demonstrate the superior performance of the CGDL inverter attaining a peak efficiency of 98.7% and a California Energy Commission efficiency of 98.5% at 75/50 kHz switching frequency.
Efficient algebraic solution for elliptic target localisation and antenna position refinement in multiple‐input–multiple‐output radars
Authors: Amiri Rouhollah , Behnia Fereidoon , Noroozi Ali
Published: July 2019

In this study, an algebraic closed‐form method for jointly locating the target and refining the antenna positions in multiple‐input–multiple‐output radar systems is proposed. First, a set of linear equations is formed by non‐linear transformation and nuisance parameters elimination, and then, an estimate of the target position is obtained by employing a weighted least‐squares estimator. To jointly refine the target and antenna positions, the associated error terms are estimated in the sequence. The proposed method is shown analytically and confirmed by simulations to attain the Cramér–Rao lower bound performance under small‐error conditions. Numerical simulations are given to support the theoretical developments.
Method of imaging and parameter estimation for moving targets with single‐channel SAR
Authors: Ryu Bo‐Hyun , Kang Byung‐Soo , Lee Myung‐Jun , Kim Kyung‐Tae
Published: July 2019

In general, conventional synthetic aperture radar (SAR) imaging algorithms focus SAR images for stationary targets. However, in the case of moving targets, the motion of the targets induces an undesired range variation which makes the obtained SAR images to be dislocated and defocused. Therefore, in this study, the authors propose a method that effectively focuses the SAR images for the moving targets and estimates their motion parameters with single‐channel SAR system. The proposed method consists of the following three steps: (i) direct exploitation of the range variation from the echo signal, (ii) range cell migration compensation with the estimated range information, and (iii) Doppler compensation and parameter estimation. The simulation results demonstrate the robust performance and high computational efficiency compared to the conventional moving target imaging algorithms.
Fundamental transverse vibrations of the active region solar corona
Authors: Luna M. , Oliver R. , Antolin P. , Arregui I.
Published: July 2019

Context. Some high-resolution observations have revealed that the active region solar corona is filled with a myriad of thin strands even in apparently uniform regions with no resolved loops. This fine structure can host collective oscillations involving a large portion of the corona due to the coupling of the motions of the neighbouring strands.

Aims. We study these vibrations and the possible observational effects.

Methods. We theoretically investigated the collective oscillations inherent to the fine structure of the corona. We have called them fundamental vibrations because they cannot exist in a uniform medium. We used the T-matrix technique to find the normal modes of random arrangements of parallel strands. We considered an increasing number of tubes to understand the vibrations of a huge number of tubes of a large portion of the corona. We additionally generated synthetic time-distance Doppler and line-broadening diagrams of the vibrations of a coronal region to compare with observations.

Results. We have found that the fundamental vibrations are in the form of clusters of tubes where not all the tubes participate in the collective mode. The periods are distributed over a wide band of values. The width of the band increases with the number of strands but rapidly reaches an approximately constant value. We have found an analytic approximate expression for the minimum and maximum periods of the band. The frequency band associated with the fine structure of the corona depends on the minimum separation between strands. We have found that the coupling between the strands is on a large extent and the motion of one strand is influenced by the motions of distant tubes. The synthetic Dopplergrams and line-broadening maps show signatures of collective vibrations, not present in the case of purely random individual kink vibrations.

Conclusions. We conclude that the fundamental vibrations of the corona can contribute to the energy budget of the corona and they may have an observational signature.
De l’expérience de la grossesse chez des femmes ayant souffert de troubles des conduites alimentaires : une étude qualitative
Authors: Nicolas Isabelle , Picard Ada , Lamas Claire , Corcos Maurice
Published: July 2019

Les femmes enceintes souffrant de troubles des conduites alimentaires (TCA) ont le plus souvent une régression des symptômes pendant la grossesse, mais avec une aggravation fréquente dans le post-partum, ce qui ne sera pas sans effet sur la rencontre avec le bébé à venir.

L’objectif de cette étude a été d’évaluer l’expérience de la grossesse chez des femmes concernées par un trouble des conduites alimentaires (TCA) afin de mieux déceler les enjeux subjectifs que ces femmes identifient à cette période, en la comparant à celle de femmes n’ayant pas de TCA. 21 femmes enceintes, dont 11 concernées par un TCA actuel ou ancien, et 10 issues d’un groupe contrôle, ont été évaluées à partir d’un entretien semi structuré abordant leurs représentations de la grossesse en cours, l’évolution des relations affectives, et la perception des modifications corporelles. Les entretiens ont fait l’objet d’une analyse qualitative sur une base phénoménologique.

Dans notre étude la grossesse est plus déstabilisante dans le groupe TCA, les patientes de ce groupe ayant une meilleure capacité de verbalisation, mais avec une charge émotionnelle intense associée à un besoin de contrôle.

On observe ainsi un double mouvement de fragilisation et d’actualisation des conflits psychiques, ce qui nous amène à faire l’hypothèse qu’elles pourraient être à la fois plus fragiles et plus accessibles aux soins, étant donné qu’elles gèrent moins leurs angoisses en convoquant le symptôme alimentaire.
De l’expérience de l’homosexualité dans une maladie a-sexuellement transmissible : à partir de la rencontre clinique avec des adolescentes souffrant de troubles alimentaires
Authors: Sulimovic Leslie , Nicolas Isabelle , Corcos Maurice
Published: July 2019

La psychogenèse de l’homosexualité féminine et la psychopathologie des troubles des conduites alimentaires (TCA) présentent des similarités, notamment concernant la place du féminin. La sexualité des TCA est un point nodal de cette psychopathologie, particulièrement à l’adolescence, moment sensible d’après-coup de la mise en place de l’axe narcissico-objectal. Nous avons souhaité nous interroger sur l’homosexualité chez des adolescentes et jeunes adultes souffrant de troubles alimentaires, afin de dégager des pistes de réflexion tant sur ce choix d’objet que sur la psychopathologie des TCA. Nous avons pour cela fait passer des entretiens abordant spécifiquement des questions liées à l’histoire de leur sexualité, le vécu de leur féminité, les projections dans l’avenir et le lien entre orientation sexuelle et TCA. Nous avons pu observer que l’homosexualité pouvait être expliquée en lien avec la psychopathologie des TCA, dégageant une piste de réflexion sur l’interrelation entre ces deux entités, accordées par la volonté d’échapper à l’assignation à un genre. Au-delà d’une pathologie de l’axe narcissico-objectal et d’un refus de sexualité, nous y voyons déjà un refus du sexuel, mais aussi du sexe.
Les enjeux de la transmission dans les institutions de soins, d’éducation et de formation
Authors: Maurin Souvignet Aurélie , Pinel Jean-Pierre
Published: July 2019

Les institutions soignantes tout comme les pédagogies nouvelles sont actuellement profondément déstabilisées, de telle sorte que l’on peut observer en de nombreuses institutions une rupture de transmission actualisée par l’effacement du modèle fondateur, et cela parfois dans des hauts lieux de la clinique institutionnelle d’orientation analytique tout comme dans des institutions historiquement ancrées dans des mouvements militants de l’éducation nouvelle par exemple. C’est fort de ce constat, confirmé par les interventions et recherches cliniques que nous conduisons en divers sites psychiatriques, médico-sociaux, sociaux, éducatifs et de formation, que nous avons choisi d’explorer à deux voix la question spécifique et particulièrement actuelle des enjeux, des empêchements, des manquements (et de leurs effets) de la transmission entre les générations dans les ensembles intersubjectifs et plus particulièrement dans les institutions éducatives et médicosociales. L’article se situe dans le champ épistémologique et méthodologique ouvert par la métapsychologie des espaces psychiques coordonnés et interférents.
Psychodynamique du travail et genre : surmonter la perte de la voix féminine
Authors: Molinier Pascale
Published: July 2019

La psychodynamique du travail a étendu les conditions sociales de la sublimation au travail ordinaire et à la dynamique de la reconnaissance. Selon Christophe Dejours, la reconnaissance porte sur le faire mais elle se capitalise dans le registre de l’être. Or ce que les femmes font est généralement confondu avec ce qu’elles sont. D’où un déficit chronique de reconnaissance de leurs contributions, bien sûr aggravé par les rapports sociaux de domination (voir l’effet Mathilda dans les sciences). Ce constat sera ici principalement argumenté à partir des analyses psychodynamiques du travail féminisé (les activités de care) qui se caractérisent par leur discrétion. De la sous-estimation du travail féminin, il résulte de nombreuses conséquences, tant sur le plan théorique que clinique : la sublimation dépend-elle nécessairement de la reconnaissance ? – on déplacera cette question autour de l’expressivité et de la voix.
L’intersubjectivité : le point de vue des neurosciences et de la psychologie cognitive
Authors: Seigneuric Alix
Published: July 2019

Cet article se propose d’apporter l’éclairage des sciences cognitives et de la psychologie cognitive sur la question de l’intersubjectivité. La découverte des neurones miroirs chez le singe macaque dans les années 1990 constitue un événement majeur ouvrant de nouvelles perspectives de recherche sur l’intersubjectivité et la cognition sociale chez l’être humain. Les travaux se sont ainsi efforcés d’identifier l’existence de tels systèmes miroirs chez l’être humain et de préciser leur rôle et leur fonctionnement. En prenant appui sur de nombreux résultats exploitant les techniques de neuroimagerie, plusieurs modèles ont été proposés notamment celui de la « simulation incarnée » développé par Gallese dans les années 2000. La simulation incarnée, sous-tendue par les neurones miroirs, est décrite comme relevant d’un ensemble de mécanismes implicites et automatiques de résonance par réactivation des systèmes neuronaux d’un individu à partir de ce qu’il perçoit chez un autre individu. Ce système jouerait un rôle majeur dans la compréhension des actions et des émotions d’autrui et serait également impliqué dans la compréhension du langage. Par ailleurs son fonctionnement serait dépendant de variables individuelles et situationnelles. Cet aspect est illustré ici par deux exemples, l’un pris dans le domaine de la compréhension des émotions et l’autre, celui de la compréhension des textes.
Entre psychiatrie et radicalisation : une relation prudente et attentive
Authors: David Michel
Published: July 2019

La radicalisation met les sociétés démocratiques au défi de ne pas s’identifier à l’agresseur. La psychiatrie est interpellée en milieu libre ou en prison pour répondre à des situations qu’elle considère comme relevant rarement de sa compétence.

Face à la radicalisation extrême avec sa violence dévastatrice, la psychiatrie doit s’en tenir à sa mission thérapeutique dans le respect des principes fondamentaux comme le secret médical et l’indépendance professionnelle, sans pour autant se tenir en retrait de la société. Un arsenal clinique, thérapeutique, éthique, organisationnel et juridique permet une intervention et un signalement lorsqu’une situation potentiellement dangereuse est repérée. Le risque le plus grand consisterait à abolir la sécurité et la pertinence d’un contexte soignant au détriment de tous du fait d’une minorité en donnant l’impression de céder à une panique qui ne pourrait que ravir ceux qui s’opposent aux principes démocratiques. Si l’opinion publique, à laquelle semble s’identifier le pouvoir politique, considère que les actes terroristes et notamment « suicidaires » ne peuvent être que le stigmate de la folie, les psychiatres identifient peu de malades mentaux parmi les personnes dites radicalisées. La psychiatrie, et notamment la pédopsychiatrie, interviendra, comme pour tout autre patient, de manière adaptée et proportionnée, continuant la réflexion soutenue, mais discrète engagée par le Syndicat des Psychiatres des Hôpitaux (SPH), l’Association des Secteurs de Psychiatrie en Milieu Pénitentiaire (ASPMP) et la Fédération Française de Psychiatrie (FFP) depuis des années conformément à la phronesis aristotélicienne définie comme de la prudence.
Heuristic dynamic approach to perishable products in presence of deterioration effect
Authors: Bahebshi Raghad O. , Almaktoom Abdulaziz T.
Published: July 2019

Joining warehouses and suppliers facilities to deliver the finished product to the end customer is a complex process that requires extensive consideration. The resulting chain is an integration of such entities as the supplier, manufacturer, distributor, warehouse, retailer, and end customer. A perishable product is any product that can rot, spoil, or deteriorate rapidly and, soon after manufacture, may become unusable or obsolete. Perishable products thus have special nutritional characteristics that necessitate care and unique treatment for them. Such products can be anything that becomes outdated a short time after production or harvest, such as fruits, vegetables, meat, certain drinks, blood, and pharmaceuticals. The objective of this study is to find the best heuristics for distributing multiple perishable products as early as possible to maximize profit. Case studies involving featuring perishable products at different rates of degradation with multiple retailers and limited transportation capacity were carried out to demonstrate the effectiveness of the proposed method.
Individuelle und multiprofessionelle Prävention und
Therapie
Authors: Blumenrode Stefan
Published: July 2019

Welche Möglichkeiten gibt es, um ein Delir nicht-medikamentös zu behandeln oder
sogar zu verhindern? Wesentlich für eine wirkungsvolle Delirprophylaxe ist, die
individuellen Risikofaktoren zu erheben und einzuschätzen. Darauf aufbauend kann
dann ein multiprofessioneller Therapieansatz erarbeitet werden.