Digital magnetic recording is based on the storage of a bit of information in the orientation of a magnetic system with two stable ground states. Here we address two fundamental problems that arise when this is done on a quantized spin: quantum spin tunneling and backaction of the readout process. We show that fundamental differences exist between integer and semi-integer spins when it comes to...

In this essentially Unsolved Problems of Noise (UPoN) paper we further study the question recently posed in Fluctuation and Noise Letters (December 2007), if there is and interaction between bodies with correlated information content, and weather the observed weight transients during/after changing the information content in memory devices is due to a new type of interaction, a new type of "fif...

We present an overview of a software system for storing, retrieving, georeferencing and visualizing boundary information obtained from Census 2000 Tiger/Line files, ESRI shape files or from image processing. Boundary information represents a vector data type as opposed to grid-based information denoted as a raster data type. In a Geospatial Information System (GIS) both data types are present. ...

Digital information is accumulating at an astounding rate, straining our ability to store and archive it. DNA is among the most dense and stable information media known. The development of new technologies in both DNA synthesis and sequencing make DNA an increasingly feasible digital storage medium. We developed a strategy to encode arbitrary digital information in DNA, wrote a 5.27-megabit boo...

The development and evolution of new applications with high storage needs resulted in strengthening the role and importance of Tertiary Storage Systems. Information arrangement on tertiary media is a crucial factor aaecting the overall system's performance. In the present paper an overview of Tertiary Storage Systems is presented and diierent data placement policies (adopted in secondary storag...

SIR,-Like you in your Nov 17 editorial "Brevity in The Lancet" we decided to "store, rather than print, the fine detail" of certain articles which we call, in their published form, Technical Briefs. We have published 5-10 in each monthly issue since 1986. We have been surprised at the rarity of requests for these stored details: among several hundred Technical Briefs published so far, we have r...

Many important transitions in evolution are associated with novel ways of storing and transmitting information. The storage of information in DNA sequence, and its transmission through DNA replication, is a fundamental hereditary system in all extant organisms, but it is not the only way of storing and transmitting information, and has itself replaced, and evolved from, other systems. A system ...

Novel strategies for information storage technology rely upon multistable systems that can be controllably switched between different configurations of comparable free energy. Multistability is present in many molecular and supramolecular systems through a variety of properties (conformations, redox and spin states, shape and dimensionality) that can be influenced by external stimuli. In the so...

Content-addressability is a fundamental feature of human memory underlying many associative information retrieval tasks. In contrast to location-based memory devices, content-addressable memories require complex interactions between memory elements, which makes conventional computation paradigms difficult. Here we present a molecular computational model of content-addressable information storag...

would enable them to coopt proteins destined for other The dendrites of a typical neuron in the central nervous late LTP synaptic sites. To test this idea, a “two-pathsystem bear at least 1000 postsynaptic specializations way” experimental design was employed in which two indicating that in principal the individual neuron can independent sets of presynaptic afferents that converge process and s...