Results 121 to 130 of about 22,670 (283)

Effect of symmetry-breaking on the MHD edge stability limit of tokamak plasmas

Nuclear Fusion
We demonstrate for the first time that symmetry-breaking in tokamak plasmas reduces the window of stable edge operational space, leading to a lower achievable edge pressure gradient.
J. Puchmayr, M. Dunne, E. Strumberger, M. Willensdorfer, H. Zohm, F. Hindenlang, the ASDEX Upgrade Team   +6 more
doaj   +1 more source

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

The Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza, Gabriela C. Silva, Isabel P. Silva, Frederico M. Penha, Sônia D. F. Rocha   +4 more
wiley   +1 more source

Adaptive Control of Freedom Upper-Limb Exoskeleton Robots Using Extreme Learning Machine and Terminal Sliding Mode

Majlesi Journal of Electrical Engineering
This paper presents a novel Adaptive Dynamic Terminal Sliding Mode Controller (ADTSMC) with an exponential reaching law, specifically designed for precise position control of 5-Degree of Freedom (DOF) upper-limb exoskeleton robots.
Morteza Mirzaee, Reza Kazemi
doaj   +1 more source

Transient Charging Dynamics in Stacked Ga2O3/ZnO Photovoltaic Units Governing Wavelength‐Selective Polarity Switching

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work reveals a “Photovoltaic‐Capacitance” coupling mechanism in stacked Ga2O3/ZnO devices, defining the ZnO/graphene interface as a novel Photovoltaic Dynamic‐Capacitor (PDC). The wavelength‐selective bipolar response enables a physical layer secure communication protocol based on ternary optical logic (“1,” “0,” “−1”).
Songqi Zhao, Man Zhao, Dayong Jiang, Yuhan Duan, Haoming Wei, Qingcheng Liang, Rui Deng   +6 more
wiley   +1 more source

Origin of the up/down poloidal asymmetric dependence of ELM control in ITER-like RMP configuration in KSTAR

Nuclear Fusion
Recent edge-localized modes (ELM) control experiments via resonant magnetic perturbation (RMP) in KSTAR have shown a strong up/down poloidal asymmetric coupling dependence.
Inhwan Choi, Yueqiang Liu, Yongkyoon In
doaj   +1 more source

Modelling the ability of legumes to suppress weeds [PDF]

, 2011
The ability of different legume cover crops to suppress annual weeds during the early establishment phase was compared using a simulation model of inter-plant competition and field observations.
Baddeley, J. A., Döring, Thomas F., Jones, Hannah, Marshall, Athole, Roderick, S., Storkey, Jonathan   +5 more
core  

Hetero‐Polyatomic Phosphorous Anion‐Based High‐Entropy Electrocatalyst for Efficient Bifunctional Water Electrolysis in Anion Exchange Membrane Water Electrolyzers

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study aims to propose and design a highly active and durable bifunctional hetero‐polyatomic phosphorous anions‐based electrocatalyst (CoFeNiMoTiPi) featuring an amorphous, porous structure synthesized via a simple hierarchical hybrid approach based on a combination of electrochemical deposition.
Yogendra Rosyara, Seunghwan Jo, Liting Zhang, Ruhao Cui, Seong Hyeok Kwon, Eunmin Kim, Jung Inn Sohn   +6 more
wiley   +1 more source

Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST

Nuclear Fusion
Controlling the splitting divertor heat flux caused by resonant magnetic perturbations (RMPs) is a topic of concern for fusion devices. As a fundamental prerequisite, it is necessary to understand the characteristics of the heat flux distribution under ...
Ruirong Liang, Xianzu Gong, Bin Zhang, Manni Jia, Hua Yang, Qun Ma, Youwen Sun, Zhendong Yang, Yunchan Hu, Zuhao Wang, Wei Wang, Yutong Guo, Jinwen Song, Jinping Qian, the EAST Team   +14 more
doaj   +1 more source

Elm Farm Organic Research Centre Bulletin 83 April 2006 [PDF]

, 2006
Regular bulleting with technical updates from Organic Advisory Service Issue contains: Testing for Tolerance - a pragmatic view GM Debate Vaccination nation - to jab or not to jab Future shape of OCIS Evolutionary wheat makes the grade ...
Armstrong, Mr A, Clarke, Dr S, Hinschliffe, Ms K, Hitchings, Mr T, Norman, Mr K, O'Brien, Ms J, Pearce, Dr B, Philipps, Ms L, Sanders, Mr R, Thomas, J, Wolfe, Prof M, Woodward, Mr L   +11 more
core  

Phenolate‐ and Alcoholate‐Based Chromium N‐Heterocyclic Carbene Complexes: Structural Peculiarities, Magnetometric and Electron Paramagnetic Resonance Study, and Catalytic Ethylene Oligomerization

European Journal of Inorganic Chemistry, EarlyView.
The first low‐oxidation (I/III) state chromium‐complex bearing a O‐chelating NHC ligand has been synthesized and structurally characterized by single‐crystal X‐ray analysis. The formation of the mixed‐valence species was further supported by SQUID magnetometry and high‐field electron paramagnetic resonance (EPR) spectroscopy.
Somnath Bhattacharya, Alexander Allgaier, Wolfgang Frey, Joris van Slageren, Michael R. Buchmeiser   +4 more
wiley   +1 more source