Physical Limits on Self-Replication Processes

Self-replication Processes in Nanosystems of Informatics

Recent research on the nanotechnological processes of molecular products and object synthesis as well as research on the nanosystems of informatics, stimulates the development of technical systems of informatics. Until now, they have been used mainly for computational tasks when, similarly to biological organisms, they allowed the development of self-replicating products and complete objects. O...

Upper Limits on Poisson Processes

This note presents a technique for the calculation of upper limits on Poisson processes at some desired conndence level given a certain number of observed events, an expected number of background events, and uncertainty on both the overall acceptance and the expected background. This hybrid frequentist/Bayes technique represents the standard adopted by the CDF Collaboration in presenting the re...

Physical limits on atomic resolution.

It is shown that the ultimate resolution is not limited by the bandwidth of the microscope but by the bandwidth (i.e., the scattering power) of the object. In the case of a crystal oriented along a zone axis, the scattering is enhanced by the channeling of the electrons. However, if the object is aperiodic along the beam direction, the bandwidth is much more reduced. A particular challenge are ...

Fundamental Physical Limits on Information Storage

Physical limits on cellular directional mechanosensing.

Many eukaryotic cells are able to perform directional mechanosensing by directly measuring minute spatial differences in the mechanical stress on their membranes. Here, we explore the limits of a single mechanosensitive channel activation using a two-state double-well model for the gating mechanism. We then focus on the physical limits of directional mechanosensing by a single cell having multi...