Materials Literature
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The single crystal structure of NH4[UO2(CH3COO)3] (I), K[UO2(CH3COO)3] (II), and Cs[UO2(CH3COO)3] (III) is studied by X-ray diffraction. I and II crystallize in the tetragonal crystal system. The crystal data are as follows: a = 13.6985(3) and c = 27.5678(14) Å, V = 5173.1(3) Å3, space group I41/a, Z = 16, and R = 0.0…
The analysis of published loading curves reveals the exponent 3/2 to the depth for nanoindentations with sharp pyramidal or conical tips. This has geometric reasons, as it occurs independent on the bonding states and indentation mechanisms. Nevertheless, most mathematical deductions and finite element simulations of n…
Cage it: A central PH2− ion (see picture, magenta) is encapsulated within a container of twelve tert-butoxides (red and black) in an icosahedral arrangement. The twelve or thirteen sodium countercations are dynamically disordered over the twenty corners of a regular dodecahedron (blue). The estimated activation barrie…
Fractional-slot PM machines have several advantages, but they suffer from the high contents of space harmonics in the air-gap MMF distribution. The MMF space harmonic amplitude and frequency depend on the particular combination of number of slots and poles. Such harmonics induce losses in the rotor since they are not…
Abstract Various techniques to manufacture low-density metallic foams containing sub-millimetre or even micrometre-sized pores are discussed and first trial experiments presented. Three strategies are evaluated: use of an intrinsic blowing agent, foaming under high pressure and foam control by mechanical pressure mani…
Computationally Efficient - Finite Element Analysis (CE-FEA) is detailed and demonstrated on a design optimization study for a sine-wave current regulated Interior Permanent Magnet (IPM) machine. In CE-FEA symmetries of electric and magnetic circuits of AC machines are fully exploited to minimize the number of require…
A threshold reverse bias of ∼21 V was observed leading to a sharp increase in the gate current of AlGaN/GaN high electron mobility transistors biased at low source-drain voltage (5 V). The gate current increases by one to two orders of magnitude at this bias, corresponding to an electric field strength around 1.8 MV c…
Abstract A new water‐soluble poly(ethylene imine)‐derivative having imidazolidine moieties was developed. With using branched poly(ethylene imine) (BPEI) as a precursor, it was modified by Michael addition reaction of its primary amino group to an acrylate having poly(ethylene glycol) (PEG) chain. The modified BPEI wa…
Overexpression of P-glycoprotein (P-gp), a plasma membrane drug transporter (ABCB1, a member of the ABC transporter family), is the most prevalent cause of multidrug resistance in cancer tissues. Lectin concanavalin A (ConA) induces massive cell death of L1210 leukemia cells (S). Cell sublines of L1210 in which P-gp o…
The paper compares five analytical models for predicting the cogging torque in surface-mounted permanent magnet machines, viz. lateral force (LF), complex permeance (CP), and combined CP models, together with subdomain (SD) models based on single slot/pole and exact SD model. The models are evaluated for the cogging t…
A method for detecting hazardous sources of acoustic-emission (AE) signals by the level of their energy activity using clustering by digitized signal shape was considered. The influence of the distance between a source and an AE transducer on the energy of recorded AE signals was analyzed. The energy distribution medi…
Theoretical predictions indicate that ordered alloys can spontaneously develop a steady-state nanoscale microstructure when irradiated with energetic particles. This behavior derives from a dynamical competition between disordering in cascades and thermally activated reordering, which leads to self-organization of the…
The purpose of the paper is to present powers balances in AC circuit containing resistance, inductance and nonlinear element. The voltage of the nonlinear element is assumed in the form of a symmetric rectangular wave with the same polarization as the current of the element. On the base of harmonics balance the equiva…
In a recent work we found equivalence between the Time Reversal techniques and the use of Meta-materials in order to achieve the overcoming of the diffraction limit. Now we present the vector generalization of a formalism developed in a former study of Discrete Acoustic Time Reversal. The ulterior purpose is to apply…
A closed-form approximate formulation is proposed to establish a relationship between the uncontrolled generator operation (UCG) of IPM motors at high speed and the constant power speed range (CPSR) and drive current capabilities. High saliency IPM motors of the PM-assisted synchronous reluctance type are mainly consi…
A scanning-probe-based technique to observe tribo-electrochemically stimulated surface was demonstrated. The configuration consists of an electrochemical cell attached to an atomic force microscope (AFM) scanner. Under an applied electrical potential and in various chemical environments, the surface morphology, roughn…
In this study, the evolution and reduction of the surface roughness during the high-speed chemical dry thinning process of Si wafers were investigated. The direct injection of NO gas into the reactor during the supply of F radicals from NF3 remote plasmas was very effective in increasing the Si thinning rate, due to t…
Abstract Ammonium illite and ammonium illite-smectite mixed layers, together with potassium illite, smectite and minute amounts of kaolinite were identified in hydrothermally altered andesite rocks from the Harghita Bãi area of the Eastern Carpathians, Romania. K-Ar dating and oxygen isotope tracing, as well as rare-e…
The Advanced Spent Fuel Conditioning Process (ACP) has been proposed and developed by the Korea Atomic Energy Research Institute (KAERI) to treat oxide spent fuels (SFs) from light water reactors to reduce the volume, heat load, and radiotoxicity of processed SFs. In the ACP, an electrochemical reduction process has b…
This work presents a state of the art revision of the results from studies of asphalt aging found by researchers aimed at deepening understanding of this complex phenomenon. The background shows the evolution of asphalt aging, initially considering it as physical hardening and progressively recognizing it as a complex…