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Apparatus for testing erosive wear of organic coatings: 1 - container for erosive material; 2 - pipe transporting erosive material; 3 - optical microscope; 4 - rotational holder for fixing metallic test specimen with organic coating; 5 - container collecting erosive material after the test Particles of granulated alundum (aloxite) of grain size 0.60...0.71 mm (acc. to PN-76/M-59111) were used as the abrasive material.
Factors contributing to the increase of erosive wear intensity are as follows: increase of epoxy material brittleness, increase of surface layer roughness and generation of different kinds of cracks, and silver crazes in this number.
This is testified by the increase of carbonyl group's content (in the wave number range of 1766-1721 cm-1) evaluated on the ground of spectroscopic examination in infrared radiation (FTIR).

For example, present implementations comprise a large number of security classes (SC).
Virtual Private Database (VPD) VPD supports fine-grained access control to data rows.
In most applications, a relatively small number of application tables will require label-based access controls.

Introduction Instrumented indentation provides a possibility to measure micro-, nanohardness and elastic moduli on small objects, including thin films, coatings and even individual grains because the direct measurement of the contact area is not necessary.
However, the necessary fitting parameters contain number of material and indenter properties, including coating strength, brittleness, tip rounding, etc. which does not provide fully unique solution [6].
Relatively recent comparison of these models by Iost et al. [9] indicated that the reliability of the hardness is inversely proportional to the number of parameters involved.

During sintering, additives such as yttrium or rare earth oxides (with alumina) react with surface oxides on the silicon nitride particles and some of the nitride itself to form a M-Si-Al-O-N liquid (M=Y or Ln) which on cooling remains as a glass [1, 4, 5], located both at grain triple points and as intergranular films.
The desire to understand the nature of the intergranular oxynitride phases in silicon nitride resulted in a number of investigations on oxynitride glass formation, structure and properties [6-13] which have shown oxynitride glasses to possess higher glass transition temperatures, elastic modulus, viscosity and hardness compared to the corresponding oxide glasses because of the extra cross-linking within the glass structure as a result of the substitution of oxygen by nitrogen.
Overall, these effects can be assumed to be related to changes in the density of the glass network and the numbers of non-bridging oxygens as Al changes from a network ion (AlO4) to a modifying role (AlO6).

The user IDs may be working card number or e-mail name, etc., the users will need to record different user name and password for different systems.A lot of people always forget passwords or use simple passwords for easily remembering, which brings security issues to the system.Resetting the passwords will bring additional working burdens to the administrators.
By referring to the features of RBAC, use the method combining LDAP with XML file store to control permissions, some data frequently changed is stored in the XML file, LDAP is responsible for a large number of query processing, the control system is responsible for updating and maintaining LDAP data and XML configuration file.As you can see in Figure 1,the server return list of application and resource according the user's permission,when the user submits a username and password.
After the authentication, the user information will establish the session on the server, store the encrypted authentication information on the client, various systems judge whether the verified users are logged in by taking authentication information and the effective judgment.The fine-grained control rules of application system are managed on its own, and this model reduces the burden of LDAP, so that LDAP query becomes more efficient.

Gregor et al. [5]used reinforced ordinary concrete (R/C) and reinforced ECC (R/ECC) for the shear beam elements cycle experiments show that, R / ECC shear failure occurs when a large number of minor cracks which is similar to ductility damage, shear toughness is much better than R / C.
With this method, damage is mitigated by increasing the shear strength and bond splitting strength through the strain hardening characteristics and by minimizing the width of cracks so as to require no repair through multiple cracking, whereby the number of fine cracks increases.
Acknowledgements This work is supported by 863 Projects, the Reinforced Concrete Used in High-Speed Railway (2008AA030704) and Fine Grain High Strength Steel and Square Steel Applications in Building Key Technologies (2008AA030704), Jiangsu and Nantong Civil Air Defense Office.

In addition, to produce TiO2 nanowires or nanotubes, a number of parameters should be considered such as reaction temperature and reaction time.
The increase in diameter of the nanowires as the temperature increased from 200 to 220 ˚C was due to the fact that grain growth with temperature.
Acknowledgments This research is financially supported by grant number ENG60021S Engineering, Prince of Songkla University.

Here, the number – ‘5’ is a turning point.
However, we can examine how our fine-grained, template-based approach to geometry generation is an improvement over existing techniques.
While these can be combined in a potentially infinite number of combinations, the space of levels we can create is much bigger and more varied.

The waste rock collected for these experiments is classified as a gravel-rich sand, with >80% of the material in the grain-size range of 0.2 mm - 20 mm.
The effluent concentrations for a number of constituents, such as sulfate (Fig. 3), Zn, Cu (Fig. 4), Mg, Mn (Fig. 5) and Al (data not shown), are rather high for the first ca. 4 weeks of the experiment, after which concentrations for all these constituents start to decrease.
The variations in various metal and sulfate concentrations in the effluent from the untreated column indicate a number of geochemical processes are controlling the aqueous composition.

In the present case, the very low value of the plate thickness requires to correct for the effect of Ewald sphere curvature and the effect of grain misorientations within the sample volume illuminated by the X-ray beam.
Thus it does not seem that the composition of the solid solution can account for the large difference in incubation time or for the large difference in precipitate number density between the two alloys.
The precipitation of the T1 phase as platelet precipitates has been shown to be influenced by the alloy solute content, which controls particularly the incubation time before its nucleation, and the resulting precipitate number density.