| The Sources of Variability in the Search Process |
MAR 2000 |
12 pages |
| Authors:
BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
 | Modelling of camouflage concealment and detection needs to consider the terrain in which a target will appear. A variety of capabilities for evaluating target signatures through to the human response now exists. The modelling approach adopted at British Aerospace research centre for many years has been a statistical one. Although image analysis techniques have been explored it has been cost effective for our purposes to stay with the statistical model ... |
|
| Experimental Study of Parameters Involved in the Process of the Generation of Microwave Radiation by Compression of Ionic Crystals |
MAR 1997 |
31 pages |
| Authors:
David Morgan; C. Budd; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| This report results from a contract tasking British Aerospace PLC as follows: The contractor will perform a service consisting of experimental study of parameters involved in the process of the generation of microwave radiation by compression of ionic crystals as described in his proposal. |
|
| Zirconia-TZM Brazed Joints. |
1994 |
|
| Authors:
D. C. Dixon; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
 | Brazing is a common method of joining metals to ceramics, and many combinations of materials and braze alloys have been reported in recent years. However, little work has been reported on brazed joints between zirconia and TZM, a high temperature molybdenum alloy. This letter describes the results of a series of brazing tests carried out in argon to examine potential brazing methods for magnesia-stabilized zirconia (MSZ) and TZM (Mo-0.5 Ti-0.1 ... |
|
| Excimer Laser Processing of Aerospace Alloys |
1993 |
|
| Authors:
Graeme Scott; Kevin Henry; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| This paper discusses the effects of different laser parameters on the etch rate of aerospace alloys. optimal processing parameters and quality of the processed material are discussed. |
|
| Fibre-Matrix Interface Transverse Tensile Debonding. |
1993 |
|
| Authors:
P. Marshall; N. Stone; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
|
| The Effects Upon Visual Performance of Varying Binocular Overlap, |
DEC 1991 |
|
| Authors:
G. K. Edgar; K. T. Carr; M. williams; J. Page; A. L. Clarke; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| In a helmet mounted display there is a trade-off between the binocular overlap of the images presented to each eye and the total field of view. It is therefore desirable to see whether decreasing the binocular overlap (and thus making possible a larger total FOV) adversely affects performance. This paper reports the results of four experiments examining the effects of different binocular overlaps upon performance on a visual search task, ... |
|
| Fibre/Matrix Interface Property Determination |
JAN 91 |
|
| Authors:
P. Marshall; J. Price; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| A 'microcomposite' single fibre pull-out test has been designed to permit the visual observation of events at the fibre/matrix interface and the collection of detailed mechanical data as interface debonding and fibre pull-out occur. The confirmation of a uniform strain gradient distribution along the embedded length of fibre by birefringence observations allows simple determination of the interfacial shear strength using the quotient F(deb)/A(int) , where F(deb) is the interface debonding ... |
|
| The Electrochemical Corrosion of Aluminium Based MMC's |
91 |
|
| Authors:
S. J. Harris; P. C. Morgan; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| Using dc electrochemical techniques, electron microscopy and surface analysis, mechanism of corrosion of sic(sub p) reinforced aluminum alloy based mmc's in saline solutions has been examined. the influence of the sic(sub p) volume fraction and the heat treatment of the material on the rate of corrosion has also been examined. the particle reinforced material was found to corrode in the saline solution at the particle/matrix interface. this may be caused ... |
|
| The Effect of Fibre Surface Morphology and Topography on Interface Bond Strength. |
1991 |
|
| Authors:
P. Marshall; J. Price; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| Scanning Tunneling Microscopy has been used to reveal the morphology of graphite crystallites at the surface of PAN based carbon fibres. The interlocking crystallites become more prominent with fibre oxidation up to an intermediate level of treatment i.e. where interface bond strength is high. Oxidation in excess of the optimum causes pitting and loss of integrity of the fibre surface leading to failure within the fibre surface itself and a ... |
|
| EEG Indicators of Mental Workload: Conceptual and Practical Issues in the Development of a Measurement Tool, |
SEP 1990 |
|
| Authors:
M. R. Hicks; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| A first objective in the development of a pilot state monitor is the development of a laboratory tool capable of measuring mental workload. Several general performance 'benchmarks' are identified that facilitate the evaluation of such techniques and a recent programme of research is described and assessed in the light of these criteria. |
|
| Fabrication Characteristics of 8090 Alloy, |
AUG 1989 |
|
| Authors:
V. H. Mould; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| This paper collates some of the experience gained so far, by a user, during a production process evaluation of 8090 medium strength Al-Li (Aluminum-Lithium) alloy. It examines the four primary production processes, machining, forming, joining, and construction, in this sense finishing, treatments, painting, plating and so forth are classed as secondary processes. Sufficient work has been completed to give the author confidence in the ability of this material to respond ... |
|
| Experiences Using the MARK IV Supersonic Hypersonic Arbitrary Body Program, |
NOV 1987 |
|
| Authors:
Carren M. Fisher; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| This paper describes work done during the last two years in an attempt to gain an understanding of, and to establish a capability for the use of, the Douglas Supersonic/Hypersonic Arbitrary Body Program (S/HABP). The program has a complex structure and offers a large variety of aerodynamic prediction methods to solve many different types of problem. Most of the features of the program have been used with some success. Aspects ... |
|
| Infrared Atmospheric Transmission/Emission Measurement in a Maritime Environment, |
MAY 1987 |
|
| Authors:
G. J. Bishop; I. W. Larkin; BRITISH AEROSPACE PLC BRISTOL (UNITED KINGDOM)
|
| This paper is divided into two parts, the first covering atmospheric measurement trials, the second describing predictions of atmospheric effects on sensor design. In 1985 a programme of collaborative electro-optical research was agreed between ARE (Admiralty Research Establishment) and British Aerospace, co-ordinated by the Naval and Electronic Systems Division at Bristol. The object of this research was to gather trials data on the performance of electro-optical systems in a maritime ... |
|
Reports by Corporate Author
