Showing papers by "David Cameron published in 1995"
TL;DR: A set of microsatellite markers mapped to the 11q11–13 region were used for linkage analysis in a large Tasmanian MEN1 pedigree, demonstrating the usefulness of these markers for presymptomatic testing in affected families.
Abstract: Oncogenesis of tumours related to multiple endocrine neoplasia type 1 (MEN1) is associated with somatic deletions involving the MEN1 locus at chromosomal region 11q13, suggesting inactivation of a tumour-suppressor gene in this region, Here we describe the localization of the MEN1 gene to a 900-kb region, based on linkage analysis in affected families and deletion mapping of MEN1-associated tumours. In addition, a set of microsatellite markers mapped to the 11q11-13 region were used for linkage analysis in a large Tasmanian MEN1 pedigree, demonstrating the usefulness of these markers for presymptomatic testing in affected families.
19 citations
4 citations
TL;DR: In this article, an equation in integral form has been derived which in principle enables the calculation of the magnetic field associated with any simple magnetron whose geometry may be regarded as being two dimensional.
Abstract: An equation in integral form has been derived which in principle enables the calculation of the magnetic field associated with any simple magnetron whose geometry may be regarded as being two dimensional. Some approximations are necessary in the course of the analysis but these are not unduly restrictive. The equation is arrived at using conformal mapping techniques. It is used to find analytic expressions for the magnetic stream function and the magnetic field for the ‘‘standard’’ rectangular magnetron geometry. Theoretical results are given for a commercial planar magnetron system. These are then compared with experimental observations.
4 citations
27 Nov 1995
TL;DR: In this paper, a non-alloyed Pd/Sn ohmic contact on n-GaAs has been developed, and the contact resistivities, /spl rho/sub c/, of the proposed metallization are measured utilizing a transmission line model.
Abstract: A non-alloyed Pd/Sn ohmic contact on n-GaAs has been developed. Metallization samples are: annealed at various temperatures and systematically characterized using Energy Dispersive Analysis of X-rays (EDAX), Secondary Ion Mass Spectrometry (SIMS) and current-voltage (I-V) measurements. Contact resistivities, /spl rho//sub c/, of the proposed metallization are measured utilizing a transmission line model (TLM) method. Annealing at 360/spl deg/C for 30 min yielded the lowest /spl rho//sub c/ of /spl sim/3.26/spl times/10/sup -5/ /spl Omega/-cm/sup 2/ on 2/spl times/10/sup 13/ cm/sup -3/ n-GaAs with a Pd(300 /spl Aring/)/Sn(1500 /spl Aring/) contact. The EDAX spectra show a correlation between Ga signal peaks and measured /spl rho//sub c/ values at various annealing temperatures. The contact depth profiles are analyzed by SIMS. The effect of metallization thickness on contact properties are also presented. The mass spectrometer analysis confirms the formation of PdGa and SnGa compounds at the lowest /spl rho//sub c/ condition.
4 citations