bluuebunny/crossref_metadata_2025 huggingface dataset:
Wheat TaPUB1 modulates plant drought stress resistance by improving antioxidant capability
Authors: Zhang Guangqiang , Zhang Meng , Zhao Zhongxian , Ren Yuanqing , Li Qinxue , Wang Wei
Published: August 2017

E3 ligases play significant roles in plant stress tolerance by targeting specific substrate proteins for post-translational modification. In a previous study, we cloned TaPUB1 from Triticum aestivum L., which encodes a U-box E3 ligase. Real-time polymerase chain reaction revealed that the gene was up-regulated under drought stress. To investigate the function of TaPUB1 in the response of plants to drought, we generated transgenic Nicotiana benthamiana (N. benthamiana) plants constitutively expressing TaPUB1 under the CaMV35S promoter. Compared to wild type (WT), the transgenic plants had higher germination and seedling survival rates as well as higher photosynthetic rate and water retention, suggesting that the overexpression of TaPUB1 enhanced the drought tolerance of the TaPUB1 overexpressing (OE) plants. Moreover, less accumulation of reactive oxygen species (ROS) and stronger antioxidant capacity were detected in the OE plants than in the WT plants. To characterize the mechanisms involved, methyl viologen (MV) was used to induce oxidative stress conditions and we identified the functions of this gene in the plant tolerance to oxidative stress. Our results suggest that TaPUB1 positively modulates plant drought stress resistance potential by improving their antioxidant capacity.
A novel missense variant in the nuclear localization signal of POU4F3 causes autosomal dominant non-syndromic hearing loss
Authors: Lin Yin-Hung , Lin Yi-Hsin , Lu Ying-Chang , Liu Tien-Chen , Chen Chien-Yu , Hsu Chuan-Jen , Chen Pei-Lung , Wu Chen-Chi
Published: August 2017

Autosomal dominant non-syndromic hearing loss (ADNSHL) is genetically heterogeneous with more than 35 genes identified to date. Using a massively parallel sequencing panel targeting 159 deafness genes, we identified a novel missense variant of POU4F3 (c.982A>G, p.Lys328Glu) which co-segregated with the deafness phenotype in a three-generation Taiwanese family with ADNSHL. This variant could be classified as a “pathogenic variant” according to the American College of Medical Genetics and Genomics guidelines. We then performed subcellular localization experiments and confirmed that p.Lys328Glu compromised transportation of POU4F3 from the cytoplasm to the nucleus. POU3F4 p.Lys328Glu was located within a bipartite nuclear localization signal (NLS), and was the first missense variant in bipartite NLS of POU4F3 validated in functional studies. These findings expanded the mutation spectrum of POU4F3 and provided insight into the pathogenesis associated with aberrant POU4F3 localization.
Network-based machine learning and graph theory algorithms for precision oncology
Authors: Zhang Wei , Chien Jeremy , Yong Jeongsik , Kuang Rui
Published: August 2017

Network-based analytics plays an increasingly important role in precision oncology. Growing evidence in recent studies suggests that cancer can be better understood through mutated or dysregulated pathways or networks rather than individual mutations and that the efficacy of repositioned drugs can be inferred from disease modules in molecular networks. This article reviews network-based machine learning and graph theory algorithms for integrative analysis of personal genomic data and biomedical knowledge bases to identify tumor-specific molecular mechanisms, candidate targets and repositioned drugs for personalized treatment. The review focuses on the algorithmic design and mathematical formulation of these methods to facilitate applications and implementations of network-based analysis in the practice of precision oncology. We review the methods applied in three scenarios to integrate genomic data and network models in different analysis pipelines, and we examine three categories of network-based approaches for repositioning drugs in drug–disease–gene networks. In addition, we perform a comprehensive subnetwork/pathway analysis of mutations in 31 cancer genome projects in the Cancer Genome Atlas and present a detailed case study on ovarian cancer. Finally, we discuss interesting observations, potential pitfalls and future directions in network-based precision oncology.
Embedded gate CVD MoS2 microwave FETs
Authors: Sanne Atresh , Park Saungeun , Ghosh Rudresh , Yogeesh Maruthi Nagavalli , Liu Chison , Mathew Leo , Rao Rajesh , Akinwande Deji , Banerjee Sanjay Kumar
Published: August 2017

Recent studies have increased the cut off frequencies achievable by exfoliated MoS2 by employing a combination of channel length scaling and geometry modification. However, for industrial scale applications, the mechanical cleavage process is not scalable but, thus far, the same device improvements have not been realized on chemical vapor deposited MoS2. Here we use a gate-first process flow with an embedded gate geometry to fabricate short channel chemical vapor deposited MoS2 radio frequency transistors with a notable fT of 20 GHz and fmax of 11.4 GHz, and the largest high-field saturation velocity, vsat = 1.88 × 106 cm/s, in MoS2 reported so far. The gate-first approach, facilitated by cm-scale chemical vapor deposited MoS2, offers enhancement mode operation, ION/IOFF ratio of 108, and a transconductance (gm) of 70 μS/μm. The intrinsic fT (fmax) obtained here is 3X (2X) greater than previously reported top-gated chemical vapor deposited MoS2 radio frequency field-effect transistors. With as-measured S-parameters, we demonstrate the design of a GHz MoS2-based radio frequency amplifier. This amplifier has gain greater then 15 dB at 1.2 GHz, input return loss  > 10 dB, bandwidth  > 200 MHz, and DC power consumption of ~10 mW.
Peptide Functionalized Gold Nanorods for the Sensitive Detection of a Cardiac Biomarker Using Plasmonic Paper Devices
Authors: Tadepalli Sirimuvva , Kuang Zhifeng , Jiang Qisheng , Liu Keng-Ku , Fisher Marilee A. , Morrissey Jeremiah J. , Kharasch Evan D. , Slocik Joseph M. , Naik Rajesh R. , Singamaneni Srikanth
Published: August 2017

The sensitivity of localized surface plasmon resonance (LSPR) of metal nanostructures to adsorbates lends itself to a powerful class of label-free biosensors. Optical properties of plasmonic nanostructures are dependent on the geometrical features and the local dielectric environment. The exponential decay of the sensitivity from the surface of the plasmonic nanotransducer calls for the careful consideration in its design with particular attention to the size of the recognition and analyte layers. In this study, we demonstrate that short peptides as biorecognition elements (BRE) compared to larger antibodies as target capture agents offer several advantages. Using a bioplasmonic paper device (BPD), we demonstrate the selective and sensitive detection of the cardiac biomarker troponin I (cTnI). The smaller sized peptide provides higher sensitivity and a lower detection limit using a BPD. Furthermore, the excellent shelf-life and thermal stability of peptide-based LSPR sensors, which precludes the need for special storage conditions, makes it ideal for use in resource-limited settings.
A simple pre-column derivatization method for the determination of mancozeb technical (fungicide) by reverse phase HPLC-UV
Authors: Petha Narendra H. , Lokhande Rama S. , Seshadri Devender T. , Patil Raju M. , Bhagat Tanaji S. , Patil Jitendra G.
Published: August 2017

A simple and fast pre-column derivatization high performance liquid chromatographic method for the technical analysis of mancozeb was developed and validated in the present study.
Characterization of phenolic acids binding to thrombin using frontal affinity chromatography and molecular docking
Authors: Yang Yu-Xiu , Li Su-Ying , Zhang Qian , Chen Hua , Xia Zhi-Ning , Yang Feng-Qing
Published: August 2017

The thrombin was simply immobilized by IAM chromatography column, and the binding parameters for phenolic acids binding to thrombin were determined by frontal affinity chromatography. The Autodock software was adopted to study the binding model between phenolic acids and thrombin.
Palladium-catalyzed aminocarbonylation of halo-substituted 7-azaindoles and other heteroarenes using chloroform as a carbon monoxide source
Authors: Kannaboina Prakash , Raina Gaurav , Anil Kumar K. , Das Parthasarathi
Published: August 2017

A palladium-catalyzed aminocarbonylation of halo-substituted 7-azaindoles and other heterocycles utilizing CHCl3 as the carbonyl source has been developed for the straightforward incorporation of an amide functional group.
Computationally-guided optimization of small-molecule inhibitors of the Aurora A kinase–TPX2 protein–protein interaction
Authors: Cole Daniel J. , Janecek Matej , Stokes Jamie E. , Rossmann Maxim , Faver John C. , McKenzie Grahame J. , Venkitaraman Ashok R. , Hyvönen Marko , Spring David R. , Huggins David J. , Jorgensen William L.
Published: August 2017

Computational binding free energy predictions were validated against experiment and used to design new inhibitors of an important protein–protein interaction.
An ambient temperature, CO2-assisted solution processing of amorphous cobalt sulfide in a thiol/amine based quasi-ionic liquid for oxygen evolution catalysis
Authors: Zhao Xinhui , Jiang Jingyun , Xue Zhimin , Yan Chuanyu , Mu Tiancheng
Published: August 2017

Amorphous cobalt sulfide nanosheets were synthesized from a 1,2-ethanedithiol/n-butylamine quasi-ionic liquid with the assistance of compressed CO2 at ambient temperature.
New semiconducting radical-cation salts of chiral bis(2-hydroxylpropylthio)ethylenedithio TTF
Authors: Lopez Jordan R. , Martin Lee , Wallis John D. , Akutsu Hiroki , Yamada Jun-ichi , Nakatsuji Shin-ichi , Wilson Claire , Christensen Jeppe , Coles Simon J.
Published: August 2017

Chiral donor molecule S,S-bis(2-hydroxylpropylthio)ethylenedithiotetrathiafulvalene has produced a series of 1 : 1 semiconducting radical-cation salts with anions bromide, chloride, perchlorate and hexafluorophosphate.
Crystallization kinetics mechanism investigation of sol–gel-derived NaYF4:(Yb,Er) up-converting phosphors
Authors: Bartha C. , Secu C. E. , Matei E. , Secu M.
Published: August 2017

The crystallization mechanism of sol–gel-derived NaYF4:(Yb,Er) up-converting phosphors has been studied by differential scanning calorimetry analysis using both model-free and model fitting approaches.
An investigation of the in-plane chemically ordered atomic laminates (Mo2/3Sc1/3)2AlC and (Mo2/3Y1/3)2AlC from first principles
Authors: Thore A. , Rosen J.
Published: August 2017

We have calculated electronic, vibrational, and elastic properties of (Mo2/3Sc1/3)2AlC and (Mo2/3Y1/3)2AlC, two recently discovered nanolaminated materials in the family of so-called i-MAX phases.
A chemometric approach for determining the reaction quantum yields in consecutive photochemical processes
Authors: Marcolongo Juan P. , Schmidt Juan , Levin Natalia , Slep Leonardo D.
Published: August 2017

Chemometrics helps in determining the quantum yields of multistep photoreactions and allows the deconvolution of the spectra of the colored intermediates.
Quantification of nucleobases/gold nanoparticles interactions: energetics of the interactions through apparent binding constants determination
Authors: Carnerero J. M. , Sánchez-Coronilla A. , Martín E. I. , Jimenez-Ruiz A. , Prado-Gotor R.
Published: August 2017

The interaction between AuNPs and adenine/thymine molecules is quantified by absorption spectroscopy and deconvolution methods; results are confirmed by DFT calculations.
Rare-earth doped fluoride phosphate glasses: structural foundations of their luminescence properties
Authors: Galleani Gustavo , Santagneli Silvia Helena , Messaddeq Younes , de Oliveira Marcos , Eckert Hellmut
Published: August 2017

We report a detailed structural investigation of a series of fluoride–phosphate glasses with different phosphate/fluoride ratios in the systemxSr(PO3)2–(100 −x)[AlF3–CaF2–SrF2–MgF2] withx= 5, 10, 20, 40.
Photocatalytic pathway toward degradation of environmental pharmaceutical pollutants: structure, kinetics and mechanism approach
Authors: Bagheri Samira , TermehYousefi Amin , Do Trong-On
Published: August 2017

During the last few years, the presence of pharmaceuticals in the aquatic environment, classified as so-called emerging contaminants, has attracted attention from the scientific community.
Ring opening polymerisation of lactide with uranium(iv) and cerium(iv) phosphinoaryloxide complexes
Authors: Sinclair Fern , Hlina Johann A. , Wells Jordann A. L. , Shaver Michael P. , Arnold Polly L.
Published: August 2017

The C3-symmetric uranium(iv) and cerium(iv) complexes Me3SiOM(OArP)3, M = U (1), Ce (2), OArP = OC6H2-6-tBu-4-Me-2-PPh2, have been prepared and the difference between these 4f and 5f congeners as initiators for the ring opening polymerisation (ROP) of l-lactide is compared.
New Au(i)–Cu(i) heterometallic complexes: the role of bridging pyridazine ligands in the presence of unsupported metallophilic interactions
Authors: Donamaría Rocío , Fernández Eduardo J. , López-de-Luzuriaga José M. , Monge Miguel , Olmos M. Elena , Pascual David , Rodríguez-Castillo María
Published: August 2017

The use of N-donor pyridazine ligands in different amounts in the reaction with a Au(i)/Cu(i) precursor allows the control of metallophilic interactions in the solid state.
Interchange between coordinated and lattice solvents generates the highest energy barrier within nine-coordinated DyIII single molecule magnets
Authors: Sun Lin , Zhang Sheng , Jiang Zhijie , Yang Qi , Chen Sanping , Zhang Yiquan , Wang Wenyuan , Wei Qing , Xie Gang
Published: August 2017

It is crucial to promote axiality to enhance easy-axis magnetic anisotropy.
A room-temperature liquid metal-based self-healing anode for lithium-ion batteries with an ultra-long cycle life
Authors: Wu Yingpeng , Huang Lu , Huang Xingkang , Guo Xiaoru , Liu Dan , Zheng Dong , Zhang Xuelin , Ren Ren , Qu Deyang , Chen Junhong
Published: August 2017

Benefiting from fluidity and surface tension, materials in a liquid form are one of the best candidates for self-healing applications.
Cranberry Proanthocyanidins – Protein complexes for macrophage activation
Authors: Carballo Sergio M. , Haas Linda , Krueger Christian G. , Reed Jess D.
Published: August 2017

In this work we characterize the interaction of cranberry (Vaccinium macrocarpon) proanthocyanidins (PAC) with bovine serum albumin (BSA) and hen egg-white lysozyme (HEL) and determine the effects of these complexes on macrophage activation and antigen presentation.
A multidisciplinary investigation of the technical and environmental performances of TAML/peroxide elimination of Bisphenol A compounds from water
Authors: Onundi Yusuf , Drake Bethany A. , Malecky Ryan T. , DeNardo Matthew A. , Mills Matthew R. , Kundu Soumen , Ryabov Alexander D. , Beach Evan S. , Horwitz Colin P. , Simonich Michael T. , Truong Lisa , Tanguay Robert L. , Wright L. James , Singhal Naresh , Collins Terrence J.
Published: August 2017

A multidisciplinary investigation of the technical and environmental performances of TAML/peroxide elimination of Bisphenol A compounds from water: destruction, oligomerisation, mechanisms, end product toxicity, and applications.
Selective cleavage of ester linkages of anhydride-cured epoxy using a benign method and reuse of the decomposed polymer in new epoxy preparation
Authors: Liu Tuan , Guo Xiaolong , Liu Wangcheng , Hao Cheng , Wang Liwei , Hiscox William C. , Liu Chengyun , Jin Can , Xin Junna , Zhang Jinwen
Published: August 2017

This work offers a successful loop-closing strategy for increasing the sustainability and lowering the manufacturing cost of epoxy materials.
Quantitative investigation of MDA-MB-231 breast cancer cell motility: dependence on epidermal growth factor concentration and its gradient
Authors: Islam Tanzila , Resat Haluk
Published: August 2017

Analysis of the individually tracked cells showed that migration of MDA-MB-231 cells depends only on the ligand gradient. Only a small percentage of cells were responsive to the ligand stimulation, which highlighted the necessity of individual cell level studies to capture the biological reality.
Structurally different mono-, bi- and trinuclear Pd(ii) complexes and their DNA/protein interaction, DNA cleavage, and anti-oxidant, anti-microbial and cytotoxic studies
Authors: Shanmugapriya A. , Jain Ruchi , Sabarinathan D. , Kalaiarasi G. , Dallemer F. , Prabhakaran R.
Published: August 2017

A series of new structurally different Pd(ii) complexes was obtained by the reactions between K2[PdCl4], 3-methoxysalicylaldehyde-4(N)-substituted thiosemicarbazone [H2L1–H2L4] and bis(diphenylphosphino)ethane [dppe].
Functionalized nitronyl nitroxide biradical bridged one-dimensional lanthanide chains: slow magnetic relaxation in the Tb and Dy analogues
Authors: Li Hongdao , Sun Juan , Yang Meng , Sun Zan , Xie Jing , Ma Yue , Li Licun
Published: August 2017

The first examples of Ln-nitronyl nitroxide 1D chains based on the functionalized nitronyl nitroxide biradical have been obtained, and complexes Dy and Tb exhibit slow magnetic relaxation behavior.
Multifunctional carbon dots for highly luminescent orange-emissive cellulose based composite phosphor construction and plant tissue imaging
Authors: Li Wei , Zhang Haoran , Zheng Yinjian , Chen Shi , Liu Yingliang , Zhuang Jianle , Liu Wei-Ren , Lei Bingfu
Published: August 2017

A new class of carbon dot (CD) grafted cellulose hybrid phosphors has been prepared in a facile and fast process.
Visible-light driven Si–Au micromotors in water and organic solvents
Authors: Zhou Dekai , Li Yuguang C. , Xu Pengtao , Ren Liqiang , Zhang Guangyu , Mallouk Thomas E. , Li Longqiu
Published: August 2017

We report the fabrication of tadpole-shaped Si–Au micromotors using glancing angle deposition.
Bromine substitution improves excited-state dynamics in mesoporous mixed halide perovskite films
Authors: Talbert Eric M. , Zarick Holly F. , Boulesbaa Abdelaziz , Soetan Naiya , Puretzky Alexander A. , Geohegan David B. , Bardhan Rizia
Published: August 2017

This study investigates the impact of Br substitution on the carrier dynamics in mixed halide perovskites using ultrafast transient absorption spectroscopy, revealing faster carrier thermalization lifetimes with increasing Br content.
syn-BN-heteroacene cored conjugated oligomers with finely tuned blue-violet luminescent properties
Authors: Zhang Wanzheng , Fu Yubin , Qiang Peirong , Hunger Jens , Bi Shuai , Zhang Wenbei , Zhang Fan
Published: August 2017

Starting from dibrominated syn-BN-heteroacenes, a series of BN-containing conjugated oligomers with blue-violet luminescence was synthesized.
Stereospecific diaza-Cope rearrangement as an efficient tool for the synthesis of DPEDA pyridine analogs and related C2-symmetric organocatalysts
Authors: Kucherenko A. S. , Kostenko A. A. , Gerasimchuk V. V. , Zlotin S. G.
Published: August 2017

Enantiomerically pure trans-1,2-di-(pyridinyl)ethylene-1,2-diamines were synthesized via a stereospecific diaza-Cope rearrangement and converted to prolinamide-based recyclable organocatalysts.
Directly synthesized nitrogen-doped microporous carbons from polybenzoxazine resins for carbon dioxide capture
Authors: Wu Jia-Yu , Mohamed Mohamed Gamal , Kuo Shiao-Wei
Published: August 2017

Highly ordered nitrogen-doped microporous carbons as CO2 capturers from the cyano-functional benzoxazine monomer through thermal curing, carbonization, and KOH activation.
A facile route to well-defined imidazolium-based poly(ionic liquid)s of enhanced conductivity via RAFT
Authors: Maksym Paulina , Tarnacka Magdalena , Dzienia Andrzej , Erfurt Karol , Chrobok Anna , Zięba Andrzej , Wolnica Kamila , Kaminski Kamil , Paluch Marian
Published: August 2017

Examining the relationship between the glass transition temperature, conductivity and molecular weight of tailored imidazolium-based PILs synthesized via RAFT.
The effect of organic additives on the intergranular conductivity of Al-doped ZnO
Authors: Gamon J. , Giaume D. , Lefèvre G. , Le Mercier T. , Barboux P.
Published: August 2017

The development of ink-based solutions as alternative routes to vacuum-based deposition techniques requires methods to improve their intergranular conductivity without thermal sintering.
(±)-Applanatumines B–D: novel dimeric meroterpenoids from Ganoderma applanatum as inhibitors of JAK3
Authors: Luo Qi , Wang Zhen , Luo Jin-Feng , Tu Zheng-Chao , Cheng Yong-Xian
Published: August 2017

Applanatumines B–D (1–3), three pairs of dimeric meroterpenoid enantiomers featuring the presence of a 6-oxo-4,4a,5,5a,6,8,8a,8b-octahydrofuro[3′,4′:4,5]cyclopenta[1,2-b]pyran-3-carbaldehyde structure core, were isolated from the fruiting bodies ofGanoderma applanatum.
Genome-wide identification and characterization of an amino acid permease gene family in Nicotiana tabacum
Authors: Zhao Yingying , Xu Yalong , Wang Zhong , Zhang Jianfeng , Chen Xia , Li Zhengfeng , Li Zefeng , Jin Lifeng , Wei Pan , Zhang Lin , Zhang Xiaoquan , Wang Ran , Wei Fang
Published: August 2017

The amino acid permease (AAP) protein family is an important class of amino acid transporter.
A mechanistic study of ethanol transformation into ethene and acetaldehyde on an oxygenated Au-exchanged ZSM-5 zeolite
Authors: Injongkol Yuwanda , Maihom Thana , Choomwattana Saowapak , Boekfa Bundet , Limtrakul Jumras
Published: August 2017

Ethanol transformation to ethene and acetaldehyde over low- and high-spin state oxygenated Au-exchanged ZSM-5 zeolite have been investigated by means of density functional calculations with the M06-L functional.
Negative differential resistance and hysteresis in Au/MoO3−δ/Au devices
Authors: Kalaev Dmitri , Rothschild Avner , Riess Ilan
Published: August 2017

Metal/oxide/metal thin devices may exhibit hysteresis and negative differential resistance (NDR) under time-varying voltage at low temperatures that strongly depend on the frequency of the applied voltage.
Nitro-enabled catalytic enantioselective formal umpolung alkenylation of β-ketoesters
Authors: Choudhury Abhijnan Ray , Manna Madhu Sudan , Mukherjee Santanu
Published: August 2017

A formal umpolung strategy is presented for the enantioselective installation of an alkenyl group with a terminal double bond at a tertiary center. This one-pot two-step sequence relies on the unique features of the nitro group, which after inverting the polarity of the alkenylating agent toward the desired bond formation, itself serves as a leaving group.
Selective and sensitive visualization of endogenous nitric oxide in living cells and animals by a Si-rhodamine deoxylactam-based near-infrared fluorescent probe
Authors: Huo Yingying , Miao Junfeng , Han Lingjun , Li Yaping , Li Zhe , Shi Yawei , Guo Wei
Published: August 2017

A Si-rhodamine deoxylactam-based near-infrared fluorescent probe has been successfully developed for the imaging of endogenous NO in living cells and mouse models.
A smart organic gel template as metal cation and inorganic anion sensor
Authors: Malviya Novina , Das Mriganka , Mandal Poulami , Mukhopadhyay Suman
Published: August 2017

Carboxamide based gelator molecule used for the detection of iron by turning off the aggregate-induced emission and selective sensing anion by either switching off or switching on the emission property of the metallogel.
Perovskite KNi0.8Co0.2F3 nanocrystals for supercapacitors
Authors: Ding Rui , Li Xudong , Shi Wei , Xu Qilei , Han Xiuli , Zhou Yong , Hong Weifeng , Liu Enhui
Published: August 2017

Perovskite KNi0.8Co0.2F3 nanocrystal-based supercapacitors delivered high power and energy densities together with excellent cycle life.
Intense NIR emission in YVO4:Yb3+ thin films by atomic layer deposition
Authors: Getz Michael N. , Hansen Per-Anders , Fjellvåg Øystein S. , Ahmed Mohammed A. K. , Fjellvåg Helmer , Nilsen Ola
Published: August 2017

Thin films of YVO4:Yb3+ exhibiting intense NIR emission have been deposited by atomic layer deposition. The NIR emission is attributed to a quantum splitting process that could be used to enhance the efficiency of solar cells.
Mathematical analysis of GaN high electron mobility transistor false turn‐on phenomenon
Authors: Iwaki T. , Ishiwaki S. , Sawada T. , Yamamoto M.
Published: August 2017

High‐power density is required in power conversion systems used in various applications, especially in electric vehicles. Driving the power devices with high frequency is one of the successful solutions to downsize a circuit's magnetic components, and hence an overall high‐power density of the circuit can be realised. Therefore, GaN high electron mobility transistor (HEMT) is widely used in many applications, owing to its high‐speed switching characteristics, low power losses, and high heat and radiation resistances. However, the high‐speed switching of GaN HEMT comes with a drawback. For instance, in a full‐bridge inverter configuration, high‐speed turn‐on of one device may cause a false turn‐on of the complementary device. If a power device has encountered a false turn‐on, the GaN HEMT devices will suffer from overcurrent, excessive heat and is eventually destructed due to the short circuit. This phenomenon can be tackled by modifying the circuit conditions. In this Letter, the theoretical analysis of a three‐phase full‐bridge inverter is developed to figure out the behaviour of the GaN HEMT gate voltage, which is the key‐factor parameter causing a false turn‐on. On the basis of the proposed theoretical analysis, the circuit conditions which minimise the gate voltage spike are derived.
Carrier synchronisation for multiple symbol Trellis‐coded CPFSK in burst‐mode transmission
Authors: Si Jiangbo , Mu Yanhong , Li Zan , Wang Yang , Zhai Wenchao , Huang Haiyan
Published: August 2017

A carrier synchronisation technique for multiple symbol Trellis‐coded continuous phase frequency shift keying (MSTC‐CPFSK) system in burst‐mode transmission is proposed. For the synchronisation technique, a joint data‐aided (DA) acquisition and phase‐locked loop (PLL) tracking algorithm is presented. First, an all‐zero sequence is utilised as a pilot for DA acquisition, where the modulated pilot waveform is a direct current (DC) signal, eliminating the operation of modulation removal; and then, a second‐order PLL structure is introduced for tracking processing, and we make an analysis of the tracking performance by calculating the equivalent Cramer–Rao bound (ECRB) for the second‐order PLL structure; subsequently, we extend the obtained result to any order PLL structures; moreover, the ECRB for the MSTC‐CPFSK system is also derived through arithmetical calculation; finally, some numerical results are given to verify the performance of the authors presented synchronisation algorithm, and the simulations illustrate that their algorithm can improve the throughput compared with the classical DA‐only algorithm.
Multiple‐input–multiple‐output cooperative spatial modulation systems
Authors: Altın Gökhan , Aygölü Ümit , Basar Ertugrul , Çelebi Mehmet E.
Published: August 2017

In this study, the authors propose novel cooperative spatial modulation (SM) systems with two main relaying techniques [amplify‐and‐forward (AF) and decode‐and‐forward (DF)], where all nodes have multiple transmit and/or receive antennas. Most of the studies in the literature of cooperative SM systems, which combine the advantages of cooperative communications and SM systems, consider only the space shift keying (SK) scheme with single receive/transmit antenna at relay and destination. Since the error performance of SM highly depends on the number of receive antennas and more flexible cooperative communications systems can be obtained by using SM with multiple antennas, it is essential to investigate multi‐antenna cooperative SM systems. They derive analytical expressions of the average bit error probability for both the newly proposed cooperative SM‐DF and cooperative SM‐AF systems and validate with the computer simulation results. Furthermore, they present the bit error rate comparison of considered systems with classical M‐ary phase SK/quadrature amplitude modulation cooperative systems. Computer simulation results indicate that multiple antennas cooperative SM systems provide better error performance than classical cooperative systems for both relaying techniques.
More general performance evaluation for single‐channel PCMA signals blind separation
Authors: Duan Chaowei , Zhan Yafeng , Liang Hao
Published: August 2017

The single‐channel blind separation performance of the mixed signals with parameters estimation error in paired carrier multiple access (PCMA) satellite communication systems is analysed in this study. Current literatures have theoretically analysed the blind separation performance using the symbol detection error probability of PCMA signals. However, the parameters of PCMA signals are assumed to be accurate during their derivations, which are not practical in blind separation scenario. In this study, the parameters' estimation error is considered during the derivation of the blind separation performance of PCMA signals. Thus, the derived performance is more general. The simulation separation result is obtained by per‐survivor processing method. It is in accordance with the derived performance.
Model predictive control of hypersonic vehicles accommodating constraints
Authors: Tang Weiqiang , Long Wenkun , Gao Haiyan
Published: August 2017

A novel tracking control strategy is proposed for a hypersonic vehicle based on model predictive control and the extended linearisation method. Unlike the general linearisation techniques, the state‐dependent coefficient parameterisation method is used to establish a linear structure of non‐linear dynamics. Based on the acquired linear system, two predictive controllers are designed for the velocity and altitude tracking in the presence of constraints. Compared with the conventional model predictive control which consumes a large amount of computer resources due to the online constrained optimisation, the predictive functional control adopts the heuristic approach to deal with constraints hence suiting fast systems more. Simulation results show the designed controllers not only meet constraint requirements but also ensure the fast response and tracking performance, and the resulting closed‐loop system is robust with respect to the parameter variations and external disturbances.
Crisscross switched multilevel inverter using cascaded semi‐half‐bridge cells
Authors: Arun Nandagopal , Noel Mathew Mithra
Published: August 2017

A new cascaded multilevel inverter (MLI) is presented with the aim of utilising lesser number of switches, better modularity and reduced voltage stress. The new structure configured under symmetric and asymmetric mode, produces all odd and even voltage levels. This structure comprises semi‐half‐bridge cells connected in series with crisscross switches to generate any target level for synthesising the sinusoidal output voltage waveform. In extension to the proposed topology, subinverters derived from the proposed MLI are cascaded with an objective to produce more voltage levels with reduced standing voltage. Compared with the cascading H‐bridge topology, the proposed MLI and the extended version uses lesser number of semi‐conductor switches. The MATLAB R2013b‐based simulation results along with the experimental results validate the proposed topology.
Graphic computational platform integrated with an electronic emulator dedicated to photovoltaic systems teaching
Authors: Sampaio Leonardo Poltronieri , Oliveira da Silva Sérgio Augusto
Published: August 2017

This study deals with the development of a photovoltaic (PV) electronic emulator (PVEE), operating integrated with a graphic computing platform, for teaching topics related to PV systems in either undergraduate or postgraduate courses. The PVEE is deployed by a DC–DC buck converter to emulate on its output terminals several characteristic curves of a specific PV system, in which climate conditions such as solar irradiation and temperature are taken into account. Emulation of the PV module characteristic curves is embedded in a digital signal controller, which is based on a mathematical model that represents the electric circuit of the PV cell. The educational platform makes possible the following tasks: (i) define and change the PV cell model, (ii) define the number of PV modules, (iii) define and change the solar irradiation and temperature that the PV modules are subjected to, and (iv) visualise voltage and current quantities that are synthesised by the PVEE. From experimental tests, the PVEE is evaluated considering climatic variations involving solar irradiation, temperature, and load transients, whose purpose is to validate the theoretical development. Furthermore, the DC–DC boost converter is employed to perform the maximum power point tracking. Experimental results demonstrate the effectiveness of the proposed system.
Real‐time implementation of three‐phase single‐stage SPV grid‐tied system using TL‐VSC
Authors: Hussain Ikhlaq , Kandpal Maulik , Singh Bhim
Published: August 2017

This work deals with real‐time implementation of a three‐phase single‐stage solar photovoltaic (SPV) grid‐tied system using a three‐level voltage source converter (TL‐VSC) working at lower switching frequency of 900 Hz under varying solar intensity levels for large power applications. The proposed system consists of SPV array, TL‐VSC, interfacing inductors, and three‐phase AC grid. The decoupled current controller with the capacitor voltage balancing control and an incremental conductance maximum power point tracking (IC‐MPPT)‐based algorithms are used to control the TL‐VSC to track and transfer maximum active power to AC grid at unity power factor from SPV array. Owing to low switching frequency and single‐stage topology, the efficacy of the system is increased. The performance of SPV grid integrated system using TL‐VSC is validated under varying solar intensity levels in the laboratory at different switching frequencies and interfacing inductors in accordance to IEEE 519 standard.
Accurate active islanding detection method for grid‐tied inverters in distributed generation
Authors: Bei Tai‐Zhou
Published: August 2017

An accurate active islanding detection method for grid‐tied inverters in distributed generation using phase disturbance based on grid synchronisation is presented in this study. To have good performance on both power quality and islanding detection, a third‐harmonic injection is generated by a new kind of phase disturbance and the scope of phase disturbance coefficient is precisely defined, besides, for extracting the third‐harmonic component at the point of common coupling accurately, a selective harmonic extraction based on multiple second‐order generalised integrators is also provided. Performances of the proposed method have been studied and confirmed through extensive simulations using MATLAB/Simulink platform.
Optimal allocation of plug‐in electric vehicle capacity to produce active, reactive and distorted powers using differential evolution based artificial bee colony algorithm
Authors: Feshki Farahani Hassan , Rashidi Farzan
Published: August 2017

Plug‐in electric vehicles (PEVs) can produce active, reactive and distorted power as well as pollution reduction. This study proposes an optimisation framework to allocate the PEVs capacity to generate each power component considering to grid and vehicle constraints, technical concerns and market price. In the proposed framework, PEVs compete with active power‐line conditioners (APLCs) to generate distorted power and with generators to produce active and reactive power. An objective function is defined which includes distribution system operator (DSO) payment for each market participant. This function is minimised based on a hybrid optimisation algorithm (HOA) combining artificial bee colony (ABC) and differential evolution (DE) algorithms subject to grid and vehicles constraints. In the presented algorithm, a novel self‐adaptive modification phase is proposed to improve overall ability of the algorithm for optimisation applications. The effectiveness and efficiency of the method is demonstrated on a low‐voltage network with 134 customers as a case study.
Multifractal detrended fluctuation analysis based novel feature extraction technique for automated detection of focal and non‐focal electroencephalogram signals
Authors: Chatterjee Soumya , Pratiher Sawon , Bose Rohit
Published: August 2017

In this contribution, a method to segregate electroencephalogram (EEG) signals into focal (F) and non‐focal (NF) groups has been proposed, employing a novel multifractal detrended fluctuation analysis (MFDFA)‐based feature sets. Manifestations in the fractal behaviour occurring due to the subtle morphological changes in F and NF EEG signals, can serve as an essential presurgical intervention for automated detection of structural epileptogenic area within the human brain. Considering the above‐said fact, in the present approach, EEG signals acquired from a publicly available database, are analysed using multifractal parameters to investigate the complex, non‐linear and stochastic fluctuations. Based on MFDFA of EEG signals, four statistically significant, new set of features have been extracted, which are eventually being used as inputs to a support vector machines and k‐nearest‐neighbour classifiers for the purpose of classification of EEG signals. It has been observed that the proposed MFDFA aided feature extraction method delivers quite commensurable and even better results in discriminating F and NF EEG signals, compared with the existing methods studied on the similar database.
Supervisory algorithm based on reaction wheel modelling and spectrum analysis for detection and classification of electromechanical faults
Authors: Izadi Vahid , Abedi Mostafa , Bolandi Hossein
Published: August 2017

This study presents the design of a supervisory software algorithm that can detect and classify different types of electromechanical faults and determine the fault source in the reaction wheel. Unlike conventional methods, which are generally based on the modelling of the entire control system, the fault occurrences and all critical points are predicted at the module level. For this purpose, a new model of the wheel is proposed in which all internal interactions are considered. Based on this model, a method of parameter estimation is proposed to classify stator and bearing faults. Furthermore, an innovative approach based on the spectral analysis of the stator current signal is applied to detect and classify faults caused by damage to the permanent magnet or flywheel. These strategies are combined to ensure that all of the electromechanical faults that are likely to occur in the wheel will be detected. Simulation and experimental results obtained from a hardware‐in‐a‐loop test bed and xPC Target toolbox demonstrate the applicability of the proposed algorithms in actual systems.
Wafer‐level vacuum‐encapsulated silicon resonators with arc‐welded electrodes
Authors: Xereas George , Chodavarapu Vamsy P.
Published: August 2017

This work presents wafer‐level vacuum‐encapsulated silicon resonators that utilise movable electrodes and arc welding in order to achieve deep sub‐micron transduction gaps. The devices are fabricated using micro‐electro‐mechanical systems (MEMS) integrated design for inertial sensors (MIDIS) process, a commercial pure‐play MEMS process, offered by Teledyne DALSA Semiconductor Inc.. The default minimum transduction gap in the MIDIS process is 1.5 μm. Here, the work introduces a technique to permanently reduce the transduction gap of the resonator using localised arc welding to a designed width of ∼200 nm. The prototype Lamé mode resonators are encapsulated in an ultra‐clean 10 mTorr vacuum cavity that ensures long‐term stability. The quality factor was measured to be 1.37 million at a resonance frequency of 6.89 MHz. With the narrower gap, the motional resistance of the resonators is reduced by a factor of ten times.
Polyaromatic disordered carbon grains as carriers of the UV bump: Far-UV to mid-IR spectroscopy of laboratory analogs
Authors: Gavilan L. , Le K. C. , Pino T. , Alata I. , Giuliani A. , Dartois E.
Published: August 2017

Context. A multiwavelength study of laboratory carbons with varying degrees of hydrogenation and sp2 hybridization is required to characterize the structure of the carbonaceous carriers of interstellar and circumstellar extinction.

Aims. We study the spectral properties of carbonaceous dust analogs from the far-ultraviolet to the mid-infrared and correlate features in both spectral ranges to the aromatic/aliphatic degree.

Methods. Analogs to carbonaceous interstellar dust encountered in various phases of the interstellar medium have been prepared in the laboratory. These are amorphous hydrogenated carbons (a-C:H), analogs to the diffuse interstellar medium component, and soot particles, analogs to the polyaromatic component. Thin films (d < 100 nm) have been measured in transmission in the vacuum-ultraviolet (VUV; 120–210 nm) within the atmospheric pressure experiment (APEX) chamber of the DISCO beam line at the SOLEIL synchrotron radiation facility. Spectra of these films were further measured through the UV-Vis (210 nm–1 μm) and in the mid-infrared (3–15 μm).

Results. Tauc optical gaps, Eg, are derived from the visible spectra. The major spectral features are fitted through the VUV to the mid-infrared to obtain positions, full-widths at half maximum (FWHM), and integrated intensities. These are plotted against the position of the π-π∗ electronic transitions peak. Unidentified or overlapping features in the UV are identified by correlations with complementary infrared data. A correlation between the optical gap and position of the π-π∗ electronic transitions peak is found. The latter is also correlated to the position of the sp3 carbon defect band at ~8 μm, the aromatic C=C stretching mode position at ~6 μm, and the H/C ratio.

Conclusions. Ultraviolet and infrared spectroscopy of structurally diverse carbon samples are used to constrain the nanostructural properties of carbon carriers of both circumstellar and interstellar extinction, such as the associated coherent lengths and the size of polyaromatic units. Our study suggests that carriers of the interstellar UV bump should exhibit infrared bands akin to the A/B classes of the aromatic infrared bands, while the circumstellar bump carriers should exhibit bands corresponding to the B/C classes.
The Carnegie Supernova Project I
Authors: Stritzinger M. D. , Taddia F. , Burns C. R. , Phillips M. M. , Bersten M. , Contreras C. , Folatelli G. , Holmbo S. , Hsiao E. Y. , Hoeflich P. , Leloudas G. , Morrell N. , Sollerman J. , Suntzeff N. B.
Published: August 2017

We aim to improve upon contemporary methods to estimate host-galaxy reddening of stripped-envelope (SE) supernovae (SNe). To this end the Carnegie Supernova Project (CSP-I) SE SN photometry data release, consisting of nearly three dozen objects, is used to identify a minimally reddened sub-sample for each traditionally defined spectroscopic sub-type (i.e., SNe IIb, SNe Ib, SNe Ic). Inspection of the optical and near-infrared (NIR) colors and color evolution of the minimally reddened sub-samples reveals a high degree of homogeneity, particularly between 0 d to +20 d relative to B-band maximum. This motivated the construction of intrinsic color-curve templates, which when compared to the colors of reddened SE SNe, yields an entire suite of optical and NIR color excess measurements. Comparison of optical/optical vs. optical/NIR color excess measurements indicates the majority of the CSP-I SE SNe suffer relatively low amounts of reddening (i.e., E(B−V)host< 0.20 mag) and we find evidence for different RVhost values among different SE SN. Fitting the color excess measurements of the seven most reddened (i.e., E(B−V)host> 0.20 mag) objects with the Fitzpatrick (1999, PASP, 111, 63) reddening law model provides robust estimates of the host visual-extinction AVhost and RVhost. In the case of the SE SNe with relatively low amounts of reddening, a preferred value of RVhost is adopted for each sub-type, resulting in estimates of AVhost through Fitzpatrick (1999) reddening law model fits to the observed color excess measurements. Our analysis suggests SE SNe reside in galaxies characterized by a range of dust properties. We also find evidence that SNe Ic are more likely to occur in regions characterized by larger RVhost values compared to SNe IIb/Ib and they also tend to suffer more extinction. The later finding is consistent with work in the literature suggesting SNe Ic tend to occur in regions of on-going star formation.
Psychotherapie mit adjuvanter Gabe von serotonergen psychoaktiven Substanzen – Möglichkeiten und Hindernisse
Authors: Majić Tomislav , Jungaberle Henrik , Schmidt Timo , Zeuch Andrea , Hermle Leo , Gallinat Jürgen
Published: August 2017

Hintergrund Der Einsatz von serotonergen Halluzinogenen (Psychedelika) wie Lysergsäure-Diethylamid (LSD) und Psilocybin und Entaktogenen wie 3,4-Methylendioxymethamphetamin (MDMA) im Rahmen von Psychotherapie ist in den letzten Jahren wieder zunehmend ins Licht des wissenschaftlichen Interesses gerückt. Die vorliegende Arbeit fasst die aktuelle Evidenz zur substanzunterstützten Psychotherapie mit serotonergen Psychoaktiva zusammen.

Methode Eine selektive Literaturrecherche erfolgte in PubMed und der Cochrane Library, wobei nach Studien gesucht wurde, in denen der Einsatz von serotonergen Psychoaktiva in der Psychotherapie seit 2000 untersucht wurde.

Ergebnisse Es fanden sich Studien für die folgenden Behandlungsindikationen: Alkoholabhängigkeit (LSD und Psilocybin), Nikotinabhängigkeit (Psilocybin), Behandlung von Angst und Depression bei lebensbedrohlicher körperlicher Erkrankung (LSD und Psilocybin), Zwangsstörungen (Psilocybin), therapieresistente Major Depression (Psilocybin) und posttraumatische Belastungsstörung (MDMA).

Diskussion Abhängigkeitserkrankungen, posttraumatische Belastungsstörung sowie Angst und Depression bei lebensbedrohlicher körperlicher Erkrankung stellen derzeit die am besten evaluierten Indikationen für die substanzunterstützte Psychotherapie mit serotonergen Psychoaktiva dar. Bisher zeigten sich Hinweise für eine Wirksamkeit bei relativ guter Verträglichkeit. Weitere Studien sind erforderlich, um einzuschätzen, ob diese Substanzen in Zukunft in der Behandlung bestimmter therapieresistenter psychischer Erkrankungen eine Option darstellen können.