Observing, peeling and making strata

Daniel Colón-Ramos: Observing and making connections

T he nematode C. elegans has exactly 302 neurons, and we know the developmental lineage and physical position of each of these cells within the organism. We also have the " connectome " : a wiring diagram of the C. elegans nervous system that tells us exactly which neurons are connected to each other. We know a lot about the nervous system of this organism, yet we don't know how its neuronal co...

Decision-Making on-board an Autonomous Agile Earth-Observing Satellite

In this paper, we describe the Earth observation mission we have been working on, including its requirements in terms of autonomy. Then, we describe the decision problem to manage, the reactive/deliberative architecture we used for on-line decision-making, the decision rules used by the reactive part, and the iterated stochastic greedy search used by the deliberative part. Finally, we present r...

Classify strata

We assume there is a slight difference in the average value of the gene expression for a group of genes between two strata/time periods. There is no prior knowledge on which genes where the gene expression differs between the two strata. We test out the power of a large number of test statistics in order to identify whether the observed difference between the averages is significant. Secondly, ...

Gauge strata and particle generations

Phenomenological evidence suggests the existence of non-trivial background fields in the QCD vacuum. On the other hand SU(3) gauge theory possessses three different classes of both non-generic and non-trivial strata that may be used as classical backgrounds. It is suggested that this threefold multiplicity of non-trivial vacua may be related to the existence of particle generations, which would...

Flood sediments and archaeological strata