title: School leaders growing leadership from within: A framework for the development of school leaders

authors: Fisher, Anthony

abstract: This article discusses the development of school leaders from within schools. Within this discussion, a framework is presented which identifies key features which support school leaders to achieve this. The authors propose that school leaders are required to deliberately establish and maintain positive relationships with their teachers while also developing a positive school culture. The framework demonstrates the strong influence that school leaders have on their relationships with teachers, and in turn the interconnectedness between these relationships and the school culture. It also shows how a positive school culture enables school leaders to create opportunities and support teachers to develop both personally and professionally, and grow as leaders from within their schools. Although in order to create this culture, school leaders draw on aspects from various different leadership styles, we suggest that to be successful the development of a new leadership style may be timely.

text: School leaders growing leadership from within: A framework for the development of school leaders This article discusses the development of school leaders from within schools. Within this discussion, a framework is presented which identifies key features which support school leaders to achieve this. The authors propose that school leaders are required to deliberately establish and maintain positive relationships with their teachers while also developing a positive school culture. The framework demonstrates the strong influence that school leaders have on their relationships with teachers, and in turn the interconnectedness between these relationships and the school culture. It also shows how a positive school culture enables school leaders to create opportunities and support teachers to develop both personally and professionally, and grow as leaders from within their schools. Although in order to create this culture, school leaders draw on aspects from various different leadership styles, we suggest that to be successful the development of a new leadership style may be timely.

year: 2015

title: NiMH battery forensics: Instrumentation, modelling and prognostics for identifying failure

authors: Leijen, Petrus Jozef Martinus

subjects: NiMH

abstract: Battery forensics is a growing research field that is becoming increasingly important with the introduction of hybrid-electric and electric vehicles. The need to correctly diagnose battery condition and predict signs of early failure is well recognised. Many presently used techniques are only applicable to laboratory situations where sensitive measurement is required or where complicated mathematical approaches are needed to assess battery condition. Advanced techniques are explored, such as extended Kalman filtering, to identify the challenges associated with analysis of multi-cell battery modules. Energy-recycling hardware is developed that is capable of efficiently cycling energy to and from cells connected in a series configuration. Switching a supercapacitor-bank-based energy store between series and parallel configurations, coupled with a bidirectional switch-mode power-supply, ensures that maximum energy is retained during the analysis cycle. Extended Kalman filtering (EKF) applied to three different battery models was used to quantify the internal component values of the battery equivalent circuits. The bulk-surface model was determined to be the most appropriate for the Toyota Prius battery modules as the EKF predicted component values converge to stable values, and the recovered voltage trace has a low error. However, the computational complexity when considering 12 series-connected NiMH cells, with their individual component variation with state-of-charge and state-of-health, make the EKF approach unviable. The data harvested during the energy recycling is used to calculate a new effective capacitance measure which relates directly to battery state-of-health. Not only is there a direct relationship between effective capacitance and state-of-health, but the (Q,V) coordinate of maximum effective capacitance on the charge-voltage plane, captured during battery discharge, is able to distinguish clearly between ordinary ageing and catastrophic cell failures.

text: NiMH battery forensics: Instrumentation, modelling and prognostics for identifying failure Battery forensics is a growing research field that is becoming increasingly important with the introduction of hybrid-electric and electric vehicles. The need to correctly diagnose battery condition and predict signs of early failure is well recognised. Many presently used techniques are only applicable to laboratory situations where sensitive measurement is required or where complicated mathematical approaches are needed to assess battery condition. Advanced techniques are explored, such as extended Kalman filtering, to identify the challenges associated with analysis of multi-cell battery modules. Energy-recycling hardware is developed that is capable of efficiently cycling energy to and from cells connected in a series configuration. Switching a supercapacitor-bank-based energy store between series and parallel configurations, coupled with a bidirectional switch-mode power-supply, ensures that maximum energy is retained during the analysis cycle. Extended Kalman filtering (EKF) applied to three different battery models was used to quantify the internal component values of the battery equivalent circuits. The bulk-surface model was determined to be the most appropriate for the Toyota Prius battery modules as the EKF predicted component values converge to stable values, and the recovered voltage trace has a low error. However, the computational complexity when considering 12 series-connected NiMH cells, with their individual component variation with state-of-charge and state-of-health, make the EKF approach unviable. The data harvested during the energy recycling is used to calculate a new effective capacitance measure which relates directly to battery state-of-health. Not only is there a direct relationship between effective capacitance and state-of-health, but the (Q,V) coordinate of maximum effective capacitance on the charge-voltage plane, captured during battery discharge, is able to distinguish clearly between ordinary ageing and catastrophic cell failures.

year: 2016

title: Te Piringa

authors: Dickson, Matiu

abstract: Māori have an oral tradition, that is, the transfer of knowledge within and between generations, which was carried out orally by way of story-telling or the more formal speech-making. Ngā korero purākau are the stories and whaikōrero is formal talking on the marae or ancestral gathering places of Māori people. The value of public speaking is expressed in the saying: Ko te kōrerote kai a te Rangatira – (The chiefs thrive on talking and debating). This article looks at the transfer of knowledge to the next generation.

text: Te Piringa Māori have an oral tradition, that is, the transfer of knowledge within and between generations, which was carried out orally by way of story-telling or the more formal speech-making. Ngā korero purākau are the stories and whaikōrero is formal talking on the marae or ancestral gathering places of Māori people. The value of public speaking is expressed in the saying: Ko te kōrerote kai a te Rangatira – (The chiefs thrive on talking and debating). This article looks at the transfer of knowledge to the next generation.

year: 2010