title: New complexes with M-Si-O or M-Si-S linkages (M = Fe or Co)

authors: McIndoe, J. Scott

abstract: Ph2XSiFe(CO)2Cp [X = p-tolylS (1a), MeO (1b)] and Ph[2-MeOC6H4]XSiFe(CO)2Cp [X = Cl (2a), OMe (2b)] have been fully characterised, including X-ray crystal structure determinations for 1a, 1b and 2a. None of the examples showed any tendency for migration of the X groups from silicon to iron, with elimination of silylene.  However very ready loss of the X groups was seen in the electrospray mass spectra, suggesting formation of the cationic silylene-iron complex ions is favoured. This was especially so for 2a and 2b, where intramolecular stabilisation of the silicon centre from the 2-OMe group is possible.The stable siloxane O[SiPh2{Co(CO)4}]2 was also characterised; the X-ray crystal structure analysis shows a Si-O-Si bond angle of 153°.

text: New complexes with M-Si-O or M-Si-S linkages (M = Fe or Co) Ph2XSiFe(CO)2Cp [X = p-tolylS (1a), MeO (1b)] and Ph[2-MeOC6H4]XSiFe(CO)2Cp [X = Cl (2a), OMe (2b)] have been fully characterised, including X-ray crystal structure determinations for 1a, 1b and 2a. None of the examples showed any tendency for migration of the X groups from silicon to iron, with elimination of silylene.  However very ready loss of the X groups was seen in the electrospray mass spectra, suggesting formation of the cationic silylene-iron complex ions is favoured. This was especially so for 2a and 2b, where intramolecular stabilisation of the silicon centre from the 2-OMe group is possible.The stable siloxane O[SiPh2{Co(CO)4}]2 was also characterised; the X-ray crystal structure analysis shows a Si-O-Si bond angle of 153°.

year: 2002-01-01

title: The general theory of R-separation for Helmholtz equations

authors: Kalnins, Ernie G.

subjects: Mathematics

abstract: We develop the theory of R-separation for the Helmholtz equation on a pseudo-Riemannian manifold (including the possibility of null coordinates) and show that it, and not ordinary variable separation, is the natural analogy of additive separation for the Hamilton–Jacobi equation. We provide a coordinate-free characterization of variable separation in terms of commuting symmetry operators.

text: The general theory of R-separation for Helmholtz equations We develop the theory of R-separation for the Helmholtz equation on a pseudo-Riemannian manifold (including the possibility of null coordinates) and show that it, and not ordinary variable separation, is the natural analogy of additive separation for the Hamilton–Jacobi equation. We provide a coordinate-free characterization of variable separation in terms of commuting symmetry operators.

year: 1983-05

title: Dual cultural identity and tangihanga: Conflict, resolution and unexpected outcomes

authors: Edge, Kiri

subjects: bereavement

abstract: New Zealand has a significant number of dual-cultural whānau (families) which incorporate the identities of both Pākehā (New Zealander of European descent) and Māori (indigenous peoples of New Zealand). Little attention has been paid to the bereavement processes that will inevitably impact upon the lives of these whānau/families. As part of the Tangihanga Research Programme based at The University of Waikato, a directed study was conducted with a participant whose family/whānau included two life ways: Māori and Pākehā. An open-ended narrative approach was used to explore the participant’s bereavement after the death of his beloved wife. Two central themes emerged within the narrative, which related to conflict and eventual resolution. Decision-making processes and language played significant roles in the conflict experienced by the participant. Communication and compromise helped to resolve these conflicts. Unexpected outcomes included new understandings and strengthened connections between the participant and his wife’s marae.

text: Dual cultural identity and tangihanga: Conflict, resolution and unexpected outcomes New Zealand has a significant number of dual-cultural whānau (families) which incorporate the identities of both Pākehā (New Zealander of European descent) and Māori (indigenous peoples of New Zealand). Little attention has been paid to the bereavement processes that will inevitably impact upon the lives of these whānau/families. As part of the Tangihanga Research Programme based at The University of Waikato, a directed study was conducted with a participant whose family/whānau included two life ways: Māori and Pākehā. An open-ended narrative approach was used to explore the participant’s bereavement after the death of his beloved wife. Two central themes emerged within the narrative, which related to conflict and eventual resolution. Decision-making processes and language played significant roles in the conflict experienced by the participant. Communication and compromise helped to resolve these conflicts. Unexpected outcomes included new understandings and strengthened connections between the participant and his wife’s marae.

year: 2010