1,796 research outputs found
Method for forming thin composite solid electrolyte film for lithium batteries
A composite solid electrolyte film is formed by dissolving a lithium salt such as lithium iodide in a mixture of a first solvent which is a cosolvent for the lithium salt and a binder polymer such as polyethylene oxide and a second solvent which is a solvent for the binder polymer and has poor solubility for the lithium salt. Reinforcing filler such as alumina particles are then added to form a suspension followed by the slow addition of binder polymer. The binder polymer does not agglomerate the alumina particles. The suspension is cast into a uniform film
Method for forming thin composite solid electrolyte film for lithium batteries
A composite solid electrolyte film is formed by dissolving a lithium salt such as lithium iodide in a mixture of a first solvent which is a co-solvent for the lithium salt and a binder polymer such as polyethylene oxide and a second solvent which is a solvent for the binder polymer and has poor solubility for the lithium salt. Reinforcing filler such as alumina particles are then added to form a suspension followed by the slow addition of binder polymer. The binder polymer does not agglomerate the alumina particles. The suspension is cast into a uniform film
Modifying the photodetachment near a metal surface by a weak electric field
We show the photodetachment cross sections of H near a metal surface can be
modified using a weak static electric field. The modification is possible
because the oscillatory part of the cross section near a metal surface is
directly connected with the transit-time and the action of the
detached-electron closed-orbit which can be changed systematically by varying
the static electric field strength. Photodetachment cross sections for various
photon energies and electric field values are calculated and displayed.Comment: 16 pages, 7 figure
Development of a model for sEMG based joint-torque estimation using Swarm techniques
© 2016 IEEE. Over the years, numerous researchers have explored the relationship between surface electromyography (sEMG) signal with joint torque that would be useful to develop a suitable controller for rehabilitation robot. This research focuses on the transformation of sEMG signal by adopting a mathematical model to find the estimated joint torque of knee extension. Swarm techniques such as Particle Swarm Optimization (PSO) and Improved Particle Swarm Optimization (IPSO) were adapted to optimize the mathematical model for estimated joint torque. The correlation between the estimated joint torque and actual joint torque were determined by Coefficient of Determination (R2) and fitness value of Sum Squared Error (SSE). The outcome of the research shows that both the PSO and IPSO have yielded promising results
An Algorithmic Framework for Multiobjective Optimization
Multiobjective (MO) optimization is an emerging field which is increasingly being encountered in many fields globally. Various metaheuristic techniques such as differential evolution (DE), genetic algorithm (GA), gravitational search algorithm (GSA), and particle swarm optimization (PSO) have been used in conjunction with scalarization techniques such as weighted sum approach and the normal-boundary intersection (NBI) method to solve MO problems. Nevertheless, many challenges still arise especially when dealing with problems with multiple objectives (especially in cases more than two). In addition, problems with extensive computational overhead emerge when dealing with hybrid algorithms. This paper discusses these issues by proposing an alternative framework that utilizes algorithmic concepts related to the problem structure for generating efficient and effective algorithms. This paper proposes a framework to generate new high-performance algorithms with minimal computational overhead for MO optimization
Low temperature transport on surface conducting diamond
Magneto-transport measurements were performed on surface conducting
hydrogen-terminated diamond (100) hall bars at temperatures between 0.1-5 K in
magnetic fields up to 8T.Comment: 2 pages Optoelectronic and Microelectronic Materials & Devices
(COMMAD), 2012 Conferenc
Design and mechanical analysis of a 3D-printed biodegradable biomimetic micro air vehicle wing
The biomimetic micro air vehicles (BMAV) are unmanned, micro-scaled aircraft that are bio-inspired from flying organisms to achieve the lift and thrust by flapping their wings. There are still many technological challenges involved with designing the BMAV. One of these is designing the ultra-lightweight materials and structures for the wings that have enough mechanical strength to withstand continuous flapping at high frequencies. Insects achieve this by having chitin-based, wing frame structures that encompass a thin, film membrane. The main objectives of this study are to design a biodegradable BMAV wing (inspired from the dragonfly) and analyze its mechanical properties. The dragonfly-like wing frame structure was bio-mimicked and fabricated using a 3D printer. A chitosan nanocomposite film membrane was applied to the BMAV wing frames through casting method. Its mechanical performance was analyzed using universal testing machine (UTM). This analysis indicates that the tensile strength and Young's modulus of the wing with a membrane is nearly double that of the wing without a membrane, which allow higher wing beat frequencies and deflections that in turn enable a greater lifting performance
Structural and magnetic properties of co-sputtered Fe0.8C0.2 thin films
We studied the structural and magnetic properties of \FeC~thin films
deposited by co-sputtering of Fe and C targets in a direct current magnetron
sputtering (dcMS) process at a substrate temperature (\Ts) of 300, 523 and
773\,K. The structure and morphology was measured using x-ray diffraction
(XRD), x-ray absorption near edge spectroscopy (XANES) at Fe and C
-edges and atomic/magnetic force microscopy (AFM, MFM), respectively. An
ultrathin (3\,nm) \FeC~layer, placed between relatively thick
\FeC~layers was used to estimate Fe self-diffusion taking place during growth
at different \Ts~using depth profiling measurements. Such \FeC~layer was
also used for Fe conversion electron M\"{o}ssbauer spectroscopy (CEMS)
and nuclear resonance scattering (NRS) measurements, yielding the magnetic
structure of this ultrathin layer. We found from XRD measurements that the
structure formed at low \Ts~(300\,K) is analogous to Fe-based amorphous alloy
and at high \Ts~(773\,K), pre-dominantly a \tifc~phase has been formed.
Interestingly, at an intermediate \Ts~(523\,K), a clear presence of
\tefc~(along with \tifc~and Fe) can be seen from the NRS spectra. The
microstructure obtained from AFM images was found to be in agreement with XRD
results. MFM images also agrees well with NRS results as the presence of
multi-magnetic components can be clearly seen in the sample grown at \Ts~=
523\,K. The information about the hybridization between Fe and C, obtained from
Fe and C -edges XANES also supports the results obtained from other
measurements. In essence, from this work, experimental realization of \tefc~has
been demonstrated. It can be anticipated that by further fine-tuning the
deposition conditions, even single phase \tefc~phase can be realized which
hitherto remains an experimental challenge.Comment: 11 pages, 9 figure
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