Search results

Introduction Detection of damage in fibre reinforced composites (FRCs) is required to give an early warning before the structure actually fails.
Hofer, 'Fibre optic damage detection in composite structures', Composites, 18(4) (1987) 309-316
Sim, 'Damage detection and assessment in fibre-reinforced composite structures with embedded fibre optic sensors-review', Smart Mater.
Fernando, 'Fibre optic sensor systems for monitoring composite structures', Reinforced Plastics, 49(11) (2005) 41-49
Clements, 'Reactive Applications of Cyclic Alkylene Carbonates', Industrial & Engineering Chemistry Research, 42(4) (2003) 663-674

Camassel1 1 Groupe d'Etude des Semiconducteurs, CNRS and Université Montpellier 2, cc074-GES, 34095 Montpellier cedex 5, France 2 Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden a Corresponding author: zoulis@ges.univ-montp2.fr Keywords: Low Temperature Photoluminescence, 3C-SiC, n-type, p-type, sublimation epitaxy Abstract: Both, n-type and p-type 3C-SiC samples grown on 6H-SiC substrates by sublimation epitaxy have been investigated.
Of course, on such low doped material, apart from the usual near band excitons (BNE) and phonon replicas some fine structure should be found.
Since again on the p-type samples we have evidenced a very weak residual doping, we should resolve some interesting fine structure.
Magnification of the A0X lines collected on sample C reveals a fine structure specific of neutral acceptors bound excitons [8].
First, the two holes localise in the Coulomb field of the acceptor and form a two holes complex, then the two holes complex split giving a triplet structure.

Carbon nanotubes (CNTs) was considered as one of the ideal electrode materials for supercapacitors with excellent electrochemical performance such as high specific surface, excellent conductivity, mesopores (2–50 nm) dominated pore structures and stable performance and so on[2,3] .
It is clear from fig.1 (a) that the carbon nanotubes synthesized using LaNi5 alloy as catalyst were multi-wall carbon nanotubes, with obvious hollow tubular structure and multi-wall structure.
It may because the smaller diameter (10-30nm) of CNTs can not give full play to its mesopores (2-50nm) [4] dominated pore structures merit and disadvantage electron conduction.
Materials Chemistry and Physics.

The results obtained from experiment in this way show reasonable agreement with δη estimated from theory, exhibiting the fast response and low power consumption expected from NLO polymer films.Fig. 1: (a) The PYR-3 chromophore structure (single rotational isomer only).
The resulting interference pattern inscribes a grating structure in a host-guest film placed at the point of intersection.
The structure of PYR3 is shown in Fig 1(a).
Bulky group additions to the PYR3 structure aimed at retarding relaxation after poling should yield films with an r33 close to the initial value after inscription with a grating.
Journal of Materials Chemistry, 14:1321-1330, 2004

ANN has a computational structure inspired by a biological neural system.
Figure 1 shows the structure of ANN model with three layers.
The neural network structure is shown in Figure 1.
Results and analysis Prediction model using MATLAB m file editor to write code directly, three layers BP network structure is established.
A prediction model of sinter chemistry based on adaptive genetic network [J].Sintering and pelletizing.2005, 30(6).p:16-19.

Phinyocheep2, b 1Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand 2Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand a*chuanpit.k@psu.ac.th, bpranee.phi@mahidol.ac.th Keywords: Epoxidized natural rubber, Latex phase mixing, Alumina, Epoxidation Abstract.
The chemical structure of epoxidized rubber was confirmed using 1H-NMR spectrometer Varian Unity Inova 500MHz and epoxidation level of latex was determined.
Results and Discussion Chemical structure of epoxidized natural rubber was confirmed by appearance of the chemical shift 2.70 ppm in 1H-NMR spectra corresponding to oxiran ring proton in epoxidided unit.
This caused by combination effect of the high rigidity of the high percentage of oxiran ring structure and high hardness of alumina particles.
Nakason, Influence of modified natural rubber and structure of carbon black on properties of natural rubber compounds, Polym.

Introduction The recent development in nanotechnology has acquired great scientific interest as they are a bridge between bulk materials and atomic or molecular structures.
Interest in the study and production of nanoscaled structures is increasing.
Mechanically, both of the designs have different structures.
Based in the mechanical properties of the device structure, major factors could be affected.
Royal Society of Chemistry, 2008

Attempts have been made to enhance the functional properties of polyethylene by modifying its structure through crosslinking using, among others, irradiation with an electron beam.
Doses higher than 25 kGy are conducive to decomposition of long macrochains, spatial arrangement of the structure and, at the same time, to polymer crosslinking.
· Modification of polymer structure results in the enhancement of their mechanical and tribological properties proportionally to the applied irradiation dose
Kaptacz, Properties of ultra high molecular weight polyethylene with structure modified by plastic deformation and electron-beam irradiation, J.
J Flory, Principles of Polymer Chemistry, Cornell Unversity Press, New York, 1953.

The samples are not of that ideal structure for the existence of some irregular-shaped islands, which is similar to Chen et al.’s results, and the too long QDs growth time may be the reason.[9] Fortunately, all the samples mainly show an obvious quantum dots structure with a high density of about 1×1010 cm-2, making it possible to analyze their ferromagnetism.
The designed composition and band structure of the samples are shown in Fig. 4.
The schematic diagram of the cross section and band structure in MBE-grown In0.79Mn0.21As QDs samples.
Ku: Materials Letters, Vol. 63 (2009), p. 337 [16] Im Taek Yoon , Sejoon Lee , Yoon Shon, Seung Woong Lee, and TaeWon Kang: Journal of Physics and Chemistry of Solids, Vol. 72 (2011), p. 181

Introduction Micro/nano particles display shape and size-dependent properties that differ from their bulk materials.[1-3] Among these micro/nano particles, spherical particles can serve as building blocks for assembly the hexagonal close-packed or high symmetry face center cubic lattice (fcc) structure for photonic crystals, which can control the electromagnetic propagation.
Results and discussion：Monodispersed nonsherical particles can be prepared by using polymer surfactant P123 as structure directing agent through organic-inorganic cooperative interaction in the presence of KCl and ethanol, as shown in Figure 1.
In concentrated spherical micro/nano particle suspensions, ordered structure usually take place to maximize the free volume entropy and minimize the free energy of the system during the convective assembly process,[22] while as far as the assembly of the banana-like particles can be concerned, orientation freedom of the nonspherical particles in suspension can increase the entropy, thus favor the disordered packed structure.
Physical Chemistry, 2nd ed.; Oxford University Press; New York, 2000.