title: Separable coordinates for three-dimensional complex riemannian spaces

authors: Kalnins, Ernie G.

abstract: In this paper we study the problem of separation of variables for the equations: Helmholtz equation & Hamilton-Jacobi equation.

text: Separable coordinates for three-dimensional complex riemannian spaces In this paper we study the problem of separation of variables for the equations: Helmholtz equation & Hamilton-Jacobi equation.

year: 1979

title: "I cannot see my way clear. I cannot see the blackboard": Deconstructing personal failure stories

authors: Kotzé, Elmarie

subjects: autoethnography,

abstract: In this article, a failure identity story of a student counsellor is deconstructed. Self-data on the experiences of her six-year-old self in a school were generated through an outsider witness ceremony, as suggested by White (2007) in Maps of Narrative Practice. The data take the form of a rescued speech poem, as proposed by Speedy (2005). The article reflects on the process of data generation and of using a failure conversation map, as discussed by White (2002) in his paper “Addressing personal failure,” to analyse and deconstruct the failure identity/ies available to the student counsellor. The process of the research, the writing, and the analyses of the failure story contributed to the development of an ethical counselling practice by the student counsellor.

text: "I cannot see my way clear. I cannot see the blackboard": Deconstructing personal failure stories In this article, a failure identity story of a student counsellor is deconstructed. Self-data on the experiences of her six-year-old self in a school were generated through an outsider witness ceremony, as suggested by White (2007) in Maps of Narrative Practice. The data take the form of a rescued speech poem, as proposed by Speedy (2005). The article reflects on the process of data generation and of using a failure conversation map, as discussed by White (2002) in his paper “Addressing personal failure,” to analyse and deconstruct the failure identity/ies available to the student counsellor. The process of the research, the writing, and the analyses of the failure story contributed to the development of an ethical counselling practice by the student counsellor.

year: 2014

title: Low copper levels measured in the aortic wall of New Zealand patients with non-syndromic ascending thoracic aortic aneurysm

authors: El-Gamel, Adam

subjects: Ascending aortic aneurysm

abstract: OBJECTIVES: Studies in animals have shown causal relationships between copper (Cu) deficiency and the development of thoracic aortic aneurysms (TAAs) [1, 2]. Cu deficiency is widespread in New Zealand (NZ) soils; the high soil pH from the use of lime fertilizers reduces the bioavailability of Cu for grazing animals and growing plants; this, in turn, reduces Cu availability in the NZ human food chain. Our study is a pilot study to explore associations between Cu and TAA. We measured Cu levels in aneurysmal aortic tissues in patients undergoing Bentall procedures and non-aneurysmal aortic tissue from coronary artery bypass graft patients. METHODS: Aortic samples were collected from 2 groups of patients during elective open-heart surgery over 4 months between November 2017 and February 2018. The groups were a TAA group, patients with non-syndromic aortic aneurysm and without the bicuspid aortic valve or known infectious or inflammatory condition (ANEURYSM; n = 13), and a control coronary artery bypass graft group (CONTROL; n = 44). Standardized digested dry tissue weighed samples were analysed from both groups. Tissue extraction of trace elements was carried out using HCl-H2O2 digestion and a highly sensitive analytical technique, inductively coupled plasma mass spectrometry-used to measure elemental concentrations. RESULTS: Cu concentration (mean ± SD) was significantly lower in ANEURYSM (3.34 ± 0.16 µg/g) when compared to the CONTROL group tissues (4.33 ± 0.20 µg/g) (dry weight; mean ± SD; Student's t-test, P < 0.05). Over 46% of the Aneurysm patients were Maori and live in a geographically Cu-deficient NZ territory. CONCLUSIONS: Cu deficiency may play a role in the development or progression of non-syndromic ascending aortic aneurysms in NZ. Maori patients are more at risk as they commonly live in rural NZ, dependent on locally grown nutritional sources. Further studies are required to confirm this exciting finding and to establish cause and effect relationship.

text: Low copper levels measured in the aortic wall of New Zealand patients with non-syndromic ascending thoracic aortic aneurysm OBJECTIVES: Studies in animals have shown causal relationships between copper (Cu) deficiency and the development of thoracic aortic aneurysms (TAAs) [1, 2]. Cu deficiency is widespread in New Zealand (NZ) soils; the high soil pH from the use of lime fertilizers reduces the bioavailability of Cu for grazing animals and growing plants; this, in turn, reduces Cu availability in the NZ human food chain. Our study is a pilot study to explore associations between Cu and TAA. We measured Cu levels in aneurysmal aortic tissues in patients undergoing Bentall procedures and non-aneurysmal aortic tissue from coronary artery bypass graft patients. METHODS: Aortic samples were collected from 2 groups of patients during elective open-heart surgery over 4 months between November 2017 and February 2018. The groups were a TAA group, patients with non-syndromic aortic aneurysm and without the bicuspid aortic valve or known infectious or inflammatory condition (ANEURYSM; n = 13), and a control coronary artery bypass graft group (CONTROL; n = 44). Standardized digested dry tissue weighed samples were analysed from both groups. Tissue extraction of trace elements was carried out using HCl-H2O2 digestion and a highly sensitive analytical technique, inductively coupled plasma mass spectrometry-used to measure elemental concentrations. RESULTS: Cu concentration (mean ± SD) was significantly lower in ANEURYSM (3.34 ± 0.16 µg/g) when compared to the CONTROL group tissues (4.33 ± 0.20 µg/g) (dry weight; mean ± SD; Student's t-test, P < 0.05). Over 46% of the Aneurysm patients were Maori and live in a geographically Cu-deficient NZ territory. CONCLUSIONS: Cu deficiency may play a role in the development or progression of non-syndromic ascending aortic aneurysms in NZ. Maori patients are more at risk as they commonly live in rural NZ, dependent on locally grown nutritional sources. Further studies are required to confirm this exciting finding and to establish cause and effect relationship.

year: 2022-09-09