In addition, these tools are flexibly integrated with the learning activities under the consideration of the students' cognitive levels based on Starkey's Digital Learning Age Matrix (Starky 2011).
This dualism may have been the product of the Christology that Applewhite learned as a young man; Lewis writes that the group's teachings had "Christian elements [that] were basically grafted on to a New Age matrix".
We compared the sampled recruiter-recruit age matrix with the participant-contact age matrix collected in the Netherlands during POLYMOD (Van de Kassteele J, Van Eijkeren J, Wallinga J: Efficient estimation of age-specific social contact rates between men and women, in preparation) [ 9].
Specifically, we evaluated the validity and performance of IDM for marine sediments from a Superfund site contaminated with DDT and PCBs from many decades ago, and demonstrated the predictability of IDM for contaminant bioavailability in extensively aged matrices.
X-ray Energy Dispersive Spectroscopy analysis showed no chemical degradation incidents on the fibre reinforcement surfaces and infrared spectroscopy revealed superficial chemical alteration in the aging matrix.
The other age cohort matrices were developed in a similar manner.
Average numbers and duration of contacts and age mixing matrices for these countries have been reported elsewhere.
In addition, to compare age mixing matrices, we grouped nurses, controls, and the persons they contacted by age and calculated mean number of contacts for each age group.
Traditionally, mathematical modelling of the spread of airborne infectious diseases used age-mixing matrices that were chosen for mathematical convenience, such as proportionate mixing and so-called "who acquires infection from whom" (WAIFW) matrices [12].
In brief, individuals choose partners from the opposite sex in the group of people susceptible to the corresponding status (marriage, casual partnership or commercial sex) depending on an age preference matrix for each type of relation.
