Classes 2 to 10 illustrate three types of alterations and three levels for each type (see Section 4 for details about the introduced alterations).
This result can be explained by the small size of the hand veins database (24 persons) and the robustness of the used matching system against the introduced alterations.
Altered databases Using the introduced alterations presented in Section 4, we generated 54 databases from the 6 reference databases: FACES94, ENSIB, FERET, AR, FVC2002 DB2, and the hand veins databases.
Figure 16 shows that all the introduced alterations have an impact on overall performance of the used authentication matching algorithm presented in Section 4. Therefore, we define in Table 5 the quality sets definition for the used matching algorithm.
In order to validate the proposed quality metric, we proceed as follows: Quality criteria behavior with alterations: the first step of the validation process consists of showing the robustness of the used five quality criteria in detecting the introduced alterations: blurring, Gaussian noise, and resize alterations.
Since this strain is poorly naturally competent, phage transduction is a commonly used technique to introduce alterations into its genome (see e.g. references [2], [4], [5]).
Systematically introduced alterations were generated to minimize background expression while maintaining high levels of induced expression.
One possible reason for this discrepancy is that the increased FFA susceptibility would be due to the immortalization process, which may introduce alterations in the lipid metabolism.
Using molecular dynamic simulation, we showed evidence that this variant has the potential to introduce alterations in the protein or affect RNA splicing.
Undocumented design changes: During implementation, project staff may introduce alterations in project design and intended outcomes that they believe are necessary accommodations to get past unanticipated hurdles or design oversights.
