Female mice showing albino mosaicism due to an X-autosome translocation [Is(In7;X)Ct] have been studied in order to investigate the relationship between the distribution of melanin and the formation, early in development, of the abnormally small uncrossed retinofugal pathway characteristically found in all albino mammals. Earlier evidence indicates that cells normally bearing melanin play a rol...

The relative extent of cell mixing in tissues of mouse chimaeras or mosaics can be studied by comparing the distributions of the two cell populations in the tissues. However, the mean patch size is misleading because it is affected by both the extent of cell mixing and the relative contributions of the two cell populations. Previous work suggested that effects attributable to differences in tis...

Recently, analysis and decision-making based on spatiotemporal unmanned aerial vehicle (UAV) high-resolution imagery are gaining significant attention in smart agriculture. Constructing a dataset requires multiple UAV image mosaics taken at different times. Because the weather or flight trajectory is subject to change when images taken, typically unaligned. This paper proposes two-step approach...

Shifts in vegetation composition and cover are the result of processes acting at different levels such as landscapes, hill slopes, or plant interspaces. Analytical approaches designed for discrete objects which are based upon the inherently hierarchical nature of complex systems are well suited to research applications conducted across spatial scales. We quantified spatial and temporal vegetati...

We develop techniques for studying characteristic length scales in DNA sequences and apply these to the analysis of long genomic sequences including all available human sequences longer than 100000 bp and the nine sequenced yeast chromosomes. We nd evidence suggesting the existence of a hierarchy of characteristic length scales in all the genomic DNA sequences analyzed. In particular, we nd sim...

We study the long-time dynamics of a forest-fire model with deterministic tree growth and instantaneous burning of entire forests by stochastic lightning strikes. Asymptotically the system organizes into a coarsening self-similar mosaic of synchronized patches within which trees regrow and burn simultaneously. We show that the average patch length grows linearly with time as t--> infinity. ...

Lateral inhibition mediated by Notch is thought to generate the mosaic of hair cells and supporting cells in the inner ear, but the effects of the activated Notch protein itself have never been directly tested. We have explored the role of Notch signalling by transiently overexpressing activated Notch (NICD) in the chick otocyst. We saw two contrasting consequences, depending on the time and si...

PHASES constitute an alternative paradigm for working with multiband image data and layered grids of quantitative multivariate spatial data. PHASES differ substantially from classical counterparts in being geared toward extracting dominant characteristics of spatial mosaics in a condensed manner which facilitates and simplifies storage, analysis, presentation, and distribution. Since most lands...