http://hdl.handle.net/10204/3390 2013-05-19T07:35:12Z 2013-05-19T07:35:12Z Masa, J Ozoemena, K Schuhmann, W Zagal, JH http://hdl.handle.net/10204/6721 2013-05-03T21:55:15Z 2012-08-01T00:00:00Z

Title: Oxygen reduction reaction using N4-metallomacrocyclic catalysts: fundamentals on rational catalyst design Authors: Masa, J; Ozoemena, K; Schuhmann, W; Zagal, JH Abstract: In this review, we describe and discuss the developments in the use of metalloporphyrins and metallophthalocyanines as catalysts for oxygen reduction in aqueous electrolytes. The main goal of most researchers in this field has been to design catalysts which can achieve facile reduction of oxygen by the four-electron transfer pathway at the lowest overpotential possible. With this in mind, the primary objective of this review was to bring to light the research frontiers uncovering important milestones towards the synthesis and design of promising N4-metallomacrocyclic catalysts which accomplish the four-electron reduction of oxygen, and, based on literature, to draw attention to the fundamental requirements for synthesis of improved catalysts operating at low overpotentials. Our emphasis was not to make parallel comparisons between individual classes of N4-metallomacrocyclic complexes with respect to their activity, but rather to focus on the commonalities of the fundamental properties that govern their reactivities and how these may be aptly manipulated to develop better catalysts. Therefore, besides discussion of the progress attained with regard to synthesis and design of catalysts with high selectivity towards four-electron reduction of O2, a major part of the review highlights quantitative structure-activity relationships (QSAR) which govern the activity and stability of these complexes, which when well understood, refined and carefully implemented should constitute a fundamental gateway for rational design of better catalysts. Description: Copyright: 2012 World Scientific Publishing. This is an ABSTRACT ONLY. The definitive version is published in Journal of Porphyrins and Phthalocyanines, vol. 16(7/8), pp 761-784

2012-08-01T00:00:00Z Duncker, L Wilkinson, M http://hdl.handle.net/10204/6700 2013-04-19T21:55:15Z 2012-01-01T00:00:00Z

Title: An M&E system for measuring compliance of rural water and sanitation projects with South African policy, design standards and norms Authors: Duncker, L; Wilkinson, M Abstract: Enshrined in the South African Constitution is the right of all South Africans to an environment that is not harmful to their health or well-being and to have access to sufficient food and water. In fulfilling its role as regulator, in 2006 the National Department of Water Affairs initiated the development of a Strategy and a Framework for Monitoring, Evaluation and Reporting on water and sanitation projects. A key element was a Spot Check Assessment that was developed and piloted by the CSIR to obtain a snapshot view of the compliance of rural water and sanitation projects to policy requirements and design norms and standards. Description: 2012 Water and Health Conference: Science, Policy and Innovation, Chapel Hill, NC, USA, January 2012

2012-01-01T00:00:00Z Duncker, L http://hdl.handle.net/10204/6690 2013-04-18T21:55:17Z 2012-11-01T00:00:00Z

Title: Monitoring and evaluation of water and sanitation infrastructure in South Africa Authors: Duncker, L Abstract: This presentation focuses on water and sanitation projects in South African, and that these projects meet policy requirements, norms and standards as set by government. Description: 2012 Water and Health Conference: Science, Policy and Innovation, Chapel Hill, NC, USA, January 2012

2012-11-01T00:00:00Z Cwik, M Gizejowski, MA Goliger, AM Sitek, M http://hdl.handle.net/10204/6668 2013-04-17T21:55:19Z 2012-12-01T00:00:00Z

Title: Wind pressure loading for tall buidings: a case study of Warsaw Trade Tower Authors: Cwik, M; Gizejowski, MA; Goliger, AM; Sitek, M Abstract: This paper presents an overview of wind-tunnel tests of one of the highest buildings in Poland - Warsaw Trade Tower. The aim of the tests was to evaluate the extreme values of wind pressure over building facade. In the first part, the development of the building model and its surroundings, as well as the testing methods are described. The second part provides a description of the evaluation of the extreme pressure values using Gumbel distribution. Minimum and maximum wind pressure patterns over facade are discussed in the third part. Description: Lightweight Structures in Civil Engineering, Warsaw Military University of Technology (WAT), Warsaw, 7 December 2012

2012-12-01T00:00:00Z