A mineral medium for studying the growth of Nitrosomonas europaea was developed and examined. The medium was defined in terms of chemical speciation by using chemical equilibrium computer models. The medium significantly increased the metabolic activity of the organisms compared with previously developed media, yielding a specific growth rate as high as 3.0 day (generation time, 5.5 h). The spe...

The reliability and longevity of any storage medium is a key issue for archivists and preservationists as well as for the creators of important information. This is particularly true in the case of digital media such as DVD and CD where a sufficient number of errors may render the disc unreadable. This paper describes an initial stability study of commercially available recordable DVD and CD me...

This note describes first ideas to archive event data on mass storage media. Some crucial items still need detailed discussions with the DESY Hamburg computer center and with the HERA-B collaborations. Suggestions and comments are welcome.

An analog MOS circuit that imitates bursting properties of spiking neurons is proposed and fabricated. The circuit consists of the Oregonator device that can easily be implemented on analog CMOS LSIs. We demonstrate temporal properties of the proposed circuits by SPICE and fabricated ICs.

I review the progress that has been made in our understanding of the physics of the upper boundary layer of the Sun, its influence on frequencies of five-minute oscillations , and its role in excitation of the oscillations. I also discuss approaches to seismological diagnosis of the properties of the layer, important information about which will be obtained from MDI high-resolution data.

The management of resources on testbeds, including their description, reservation and verification, is a challenging issue, especially on of large scale testbeds such as those used for research on High Performance Computing or Clouds. In this paper, we present the solution designed for the Grid’5000 testbed in order to: (1) provide users with an in-depth and machine-parsable description of the ...

To examine the stability of repetitive-sequence (rep) PCR profiles, six species of bacteria were subcultured to blood agar plates and DNA was extracted from the cultures after 24, 48, and 72 h of incubation at 35 degrees C. In addition, the same species were subcultured to fresh blood plates daily and DNA was extracted from the cultures after growth of 5, 10, and 15 subcultures, respectively. r...