S. Akbari, P. J. Cameron, G. B. Khosrovshahi
Two simple operations on graphs (deleting isolated vertices, and identifying vertices with the same neighbour sets) do not change the rank and signature of the adjacency matrix. Moreover, for any...
A design and a geometry for the group Fi22 (2008)
The Fischer group Fi22 acts as a rank 3 group of automorphisms of a symmetric 2-(14080,1444,148) design. This design does not have a doubly transitive automorphism group, since there is a partial...
S. Akbari, P. J. Cameron, G. B. Khosrovshahi
A graph is said to be reduced if no two vertices have the same set of neighbours. It is well known that for a given natural number r, there are finitely many reduced graphs of rank r. Let m(r) denote...
A comparative plasmonic study of nanoporous and evaporated gold films (2008)
Ahl, S., Cameron, P. J., Liu, J., Knoll, Wolfgang, Erlebacher, J., Yu, F.
Vareiro, Mmlm, Tranchant, I., Maplin, S., Zak, K., Gani, M. M., Slevin, C. J., ...
The development of a single-step, separation-free method for measurement of low concentrations of fatty acid using a surface plasmon resonance-enhanced fluorescence competition assay with a...
Cameron Maimani Gh, P. J. Cameron, M. R. Maimani, Gh. R. Omidi, B. Tayfeh-rezaie
power congruent to 3 modulo 4 and therefore it can be used to construct 3-designs. In this paper, we determine all 3-designs admitting PSL(2, q) with block size not congruent to 0 and 1 modulo p...
Chifen, A. N., Forch, R., Knoll, W., Cameron, P. J., Khor, H. L., Williams, T. L., ...
This article describes a method by which intact vesicles can be chemically attached to hydrolyzed maleic anhydride films covalently bound to plasma-polymerized SiO2 on Au substrates. Surface plasmon...
Some isometry groups of the Urysohn space (2006)
We construct various isometry groups of Urysohn space (the unique complete separable metric space which is universal and homogeneous), including abelian groups which act transitively, and free groups...
Analysis of photovoltage decay transients in dye-sensitized solar cells (2006)
Walker, A. B., Peter, L. M., Lobato, K., Cameron, P. J.
It is shown that application of the so-called quasi-static approximation greatly simplifies the theoretical treatment of the open circuit photovoltage decay of dye-sensitized nanostructured solar...
Analysis of photovoltage decay transients in dye-sensitized solar cells (2006)
Walker, A. B., Peter, Laurence M, Lobato, K., Cameron, P. J.
Cameron, P. J., Peter, L. M., Hore, S.
The role of the conducting glass substrate (fluorine-doped tin oxide, FTO) in the back reaction of electrons with tri-iodide ions in dye-sensitized nanocrystalline solar cells (DSCs) has been...
In dye-sensitized nanocrystalline solar cells (DSC), the transfer of electrons from the conducting glass substrate to triiodide ions in solution is an important loss mechanism that can be suppressed...
Bailes, M., Cameron, P. J., Lobato, K., Peter, L. M.
Electron transport and recombination in dye-sensitized nanocrystalline solar cells (DSCs) are strongly influenced by the presence of trapping states in the titanium dioxide particles, and collection...
Some isometry groups of Urysohn space (2004)
Cameron, P. J., Vershik, A. M.
We constract various subgroups of the group of isometries of universal Urysohn spaces (unique complete separable metric space which is iniversal and homogeneous) including abelian groups which act...
Cameron, P. J., Peter, L. M., Zakeeruddin, S. M., Gratzel, M.
The electrochemical properties of the redox mediator Co(III)/Co(II)(dbbip)(2) (dbbip = 2,6-bis(1'-butylbenzimidazol-2'-yl)pyridine) in a mixed acetonitrile/ethylene carbonate solvent have been...
Kruger, J., Plass, R., Gratzel, M., Cameron, P. J., Peter, L. M.
Solid-state dye-sensitized solar cells employing spiro-MeOTAD [2,2'7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene] as a hole transport phase were studied by intensity modulated...
The properties of thin blocking layers of titanium dioxide used to improve the performance of dye-sensitized nanocrystalline solar cells have been studied. TiO2 blocking layers prepared on...
Cotesia rubecula (Marshall) was first released in New Zealand for control of Pieris rapae (L.) in December 1993. It has since been released in nine regions and is established in eight of these, from...
P. J. Cameron, G. P. Walker, G. M. Penny, P. J. Wigley
Movement of potato tuberworm, Phthorimaea operculella (Zeller), and diamondback moth, Plutella xylostella (L.), was examined indirectly by estimating their distribution, and directly by using...
Transitive permutation groups without semiregular subgroups (2002)
Cameron, P.J., Guidici, M., Jones, G.A., Kantor, W.M., Klin, M.H., Marusic, D., ...
A transitive finite permutation group is called elusive if it contains no nontrivial semiregular subgroup. The purpose of the paper is to collect known information about elusive groups. The main...
Antiflag-transitive collineation groups revisited (2002)
An antiflag in a projective space is a non-incident point-hyperplane pair. A subgroup G of ΓL(n,q) is antiflag-transitive if it acts transitively on the set of antiflag of PG(n − 1,q).
Braided Line and Counting Fixed Points of GL(d,F_q) (2001)
We interpret a recent formula for counting orbits of $GL(d,F_q)$ in terms of counting fixed points as addition in the affine braided line. The theory of such braided groups (or Hopf algebras in...
P. J. Cameron, G. P. Walker, A. R. Wallace
Field sampling methods and economic thresholds were developed to provide management recommendations for Helicoverpa armigera (Hübner) on processing tomatoes, based on a commercially acceptable...
Automorphisms and Enumeration of Switching Classes of Tournaments (2000)
The main result of this paper is a characterization of the abstract finite groups which are full automorphism groups of switching classes of tournaments: they are those whose Sylow 2-subgroups are...
Automorphisms and enumeration of switching classes of tournaments (2000)
Two tournaments T1 and T2 on the same vertex set X are said to be switching equivalent if X has a subset Y such that T2 arises from T1 by switching all arcs between Y and its complement X \ Y. finite...
Let i be a plane, which meets some block in precisely two points. Because of r, we canassume these points are H—Y H˜. Let �IY PY QY R � a �—Y ˜Y ™Y � � and assume ‰ a
Transfinite Methods in Geometry (1994)
A. Beutelspacher, P. J. Cameron
Some very di#cult questions in finite geometry (for example, concerning ovoids, spreads, and extensions) have fairly trivial resolutions in the infinite case, by standard transfinite induction. We...
A history of the education of girls in Queensland and South Australia (1993)
Includes bibliography.
On the intricacy of combinatorial construction problems. (1984)
Bailey, R. A., Cameron, P. J., Chetwynd, Amanda G., Daykin, D. E., Hilton, A. J. W., Holroyd, F. C., ...
P. J. Cameron, C. E. Praeger, J. Saxl, G. M. Seitz
In this paper we use the recently announced classification of finite simple groups to prove the well-known conjecture of Sims on finite permutation groups: THEOREM 1. There exists an integral...
On permutation geometries (1979)
The lattice of flats of a matroid or combinatorial geometry can be regarded as a sublattice (with rank function) of the lattice of subsets of a set, having the property that, given an element of rank...
Let G be a primitive rank 3 permutation group on a set X in which r(x) is a nontrivial G,-orbit, with II = I X 1, u = I I’(X)]. Tsuzuku [27] showed that, if G, acts as the symmetric group on r(x),...
Translates of subgroups of the multiplicative group of a finite field (1975)
Cameron, P.J., Hall, J.I., Lint, J.H. Van, Springer, T.A.
Let k be a finite field, ξ k, G a subgroup of kx. We classify the triples (k, ξ, G) for which the set ξ + G intersects less than 3 cosets of G in kx.
Permutation groups with multiply transitive suborbits (1972)
In 1929, Manning ([5]) proved that if G is a primitive permutation group on Cl which is not 2-transitive, and if the stabilizer Ga of a point aefiis 2-transitive on an orbit F(a) with | F(a) | =...