Gregory VanWiggeren and Rajarshi Roy of the Georgia Institute of Technology in the US have now used chaotic lasers to generate the complex signals of the type needed in many of today’s communications systems (G D Van Wiggeren and R Roy 1998 Science 279 1198). The chaotic laser system can be used to synchronize a […]
“What is Truth? said jesting Pilate; and would not wait for an answer.” Francis Bacon’s well known quotation shows Pilate to be a busy and sensible administrator, who was aware of problems but who knew how to avoid unnecessary conflict most of the time. However, his washing of hands for the trial of Jesus had […]
In his article last year, the Belgian physicist Jean Bricmont separated out some of the distinct strands in “science studies” and tried to provide a considered critique of sociology and history of scientific knowledge. He saw that there is a difference between “philosophical relativism” and “methodological relativism”. He grasped that the former view, which says […]
Bulk superfluid helium has many unusual properties – it can flow up walls and through narrow pores without resistance. Helium-4 and helium-3 become superfluid below 2.12 and 0.003 Kelvin respectively. However, only a proportion of the helium becomes superfluid at the transition temperature. This two-fluid model was confirmed experimentally by Andronikashvili in the mid-1940s. The […]
The new findings is reported by Brian Wernicke and colleagues from the California Institute of Technology (Caltech) and the Harvard-Smithsonian Center for Astrophysics in the current issue of Science . Since 1991 Wernicke and colleagues have been using the satellite-based Global Positioning System to measure the movement of Yucca Mountain with unprecedented precision. The team […]
In the report NuPECC suggests that national funding agencies should become more involved during the planning stage of these new facilities because future facilities and detectors will be significantly more complex and expensive compared to present systems. It also recommends that more young researchers should be encouraged into nuclear theory groups, so that progress in […]
During his five-year tenure at CERN, Llewellyn Smith has overseen an increase in funds for the Large Hadron Collider by persuading countries outside CERN, particularly the US, to become involved in the project. A theoretical physicist by training, Llewellyn Smith replaced Carlo Rubbia as director general of CERN in 1994. Prior to that, he streamlined […]
DERA has an annual turnover of £1bn, 90% of which comes from the Ministry of Defence, and is active in many areas of physics including semiconductors, materials and optics. The agency would encourage the exploitation of defence technology by industry, and the transfer of civilian technology into military programmes. For example, in the 1960s researchers […]
In Ammann’s scheme the plants are grown in a vertical structure with their roots protruding into a central column. A nozzle at the top of the structure sprays nutrients into this column, wetting the roots of the plants. The plants are also able to breathe in nitrogen and carbon dioxide through their roots, as would […]
The UK government is committed to basic science, said Battle. “The ongoing comprehensive spending review gives us the opportunity to spell out our commitment to the science base, ” he added. Battle called on physicists to keep drawing a parallel between the UK and the US, where the budget request for 1999 is up 8% […]
