Production and some properties of ligninase using foam-immobilised Phanerochaete chrysosporium

Imperial Users onl

Uniqueness of a convex sum of products of projectors

Relative to a given factoring of the Hilbert space, the decomposition of an operator into a convex sum of products over sets of distinct 1-projectors, one set linearly independent, is unique.Comment: 4 pages. v2: Minor clarifications in Section III; as accepted for publication in J Math Phy

Earth orbital teleoperator visual system evaluation program

Visual system parameters and stereoptic television component geometries were evaluated for optimum viewing. The accuracy of operator range estimation using a Fresnell stereo television system with a three dimensional cursor was examined. An operator's ability to align three dimensional targets using vidicon tube and solid state television cameras as part of a Fresnell stereoptic system was evaluated. An operator's ability to discriminate between varied color samples viewed with a color television system was determined

The effect of hydrogen sulphide on ammonium bisulphite when used as an oxygen scavenger in aqueous solutions

Peer reviewedPostprin

Manipulator system man-machine interface evaluation program

Application and requirements for remote manipulator systems for future space missions were investigated. A manipulator evaluation program was established to study the effects of various systems parameters on operator performance of tasks necessary for remotely manned missions. The program and laboratory facilities are described. Evaluation criteria and philosophy are discussed

Test report, earth orbiter teleoperator visual system evaluation program

Work carried out to identify human performance requirements for remotely manned system is reported. Specifically, an evaluation was made of the human visual system. Data cover distance estimation 4, solid target alignment 2, motion detection 1, and motion detection 2

Responses to waterlogging and frost related to the topographic sequences of eucalypt species at three sites in central Tasmania

The boundaries between the eucalypt species typical of flats and hollows and those typical of slopes have been commonly attributed to variable waterlogging and/or frost resistance. Seedlings from three pairs of eucalypt species from the flats and slopes at three altitudes in central Tasmania (Eucalyptus ovata, E. rubida, 500 m; E. rodwayi, E. pauciflora, 800 m; E. gunnii, E. coccifera, 1000 m) were grown in a glasshouse experiment to test the interactive effects of species, waterlogging and fertiliser application on growth, frost resistance and frost recovery. The flats species largely proved more resistant to waterlogging, especially when fertilised, and less resistant to frost than the slopes species. Thus, it seems likely that the boundaries between the pairs of species are caused by relative frost resistance not waterlogging resistance

Discovery of three nearby L dwarfs in the Southern Sky

We report the discovery of three L dwarfs in the solar vicinity within 30 parsecs. These objects were originally found as proper motion objects from a combination of R and I photographic plates measured as part of the SuperCOSMOS Sky Surveys. We subsequently identified these objects as bona fide brown dwarf candidates on the basis of their R-I colour, as first criterion, and subsequently their J-K colours when the infrared data were available from the 2MASS database. Spectroscopic observations in the optical with the ESO 3.6m/EFOSC2 and in the near-infrared with the NTT/SOFI led to the classification of their spectral types as early L dwarfs.Comment: 4 pages including 2 figures, accepted for publication in Astronomy and Astrophysics Letter

Earth orbital teleoperator mobility system evaluation program

The proximity translation and final docking of the space teleoperator evaluation vehicle (STEV) with large mass and small mass satellites was studied. Operations that may be performed by the STEV during the shuttle experiments are approximated