title: Heterodyne range imaging as an alternative to photogrammetry

authors: Dorrington, Adrian A.

subjects: range

abstract: Solid-state full-field range imaging technology, capable of determining the distance to objects in a scene simultaneously for every pixel in an image, has recently achieved sub-millimeter distance measurement precision. With this level of precision, it is becoming practical to use this technology for high precision three-dimensional metrology applications. Compared to photogrammetry, range imaging has the advantages of requiring only one viewing angle, a relatively short measurement time, and simplistic fast data processing. In this paper we fist review the range imaging technology, then describe an experiment comparing both photogrammetric and range imaging measurements of a calibration block with attached retro-reflective targets. The results show that the range imaging approach exhibits errors of approximately 0.5 mm in-plane and almost 5 mm out-of-plane; however, these errors appear to be mostly systematic. We then proceed to examine the physical nature and characteristics of the image ranging technology and discuss the possible causes of these systematic errors. Also discussed is the potential for further system characterization and calibration to compensate for the range determination and other errors, which could possibly lead to three-dimensional measurement precision approaching that of photogrammetry.

text: Heterodyne range imaging as an alternative to photogrammetry Solid-state full-field range imaging technology, capable of determining the distance to objects in a scene simultaneously for every pixel in an image, has recently achieved sub-millimeter distance measurement precision. With this level of precision, it is becoming practical to use this technology for high precision three-dimensional metrology applications. Compared to photogrammetry, range imaging has the advantages of requiring only one viewing angle, a relatively short measurement time, and simplistic fast data processing. In this paper we fist review the range imaging technology, then describe an experiment comparing both photogrammetric and range imaging measurements of a calibration block with attached retro-reflective targets. The results show that the range imaging approach exhibits errors of approximately 0.5 mm in-plane and almost 5 mm out-of-plane; however, these errors appear to be mostly systematic. We then proceed to examine the physical nature and characteristics of the image ranging technology and discuss the possible causes of these systematic errors. Also discussed is the potential for further system characterization and calibration to compensate for the range determination and other errors, which could possibly lead to three-dimensional measurement precision approaching that of photogrammetry.

year: 2007

title: The impact of the NCEA on teacher collegiality

authors: Barrett, Jenny

subjects: The NCEA

abstract: This study looks at the impact that the National Certification of Educational
Achievement (NCEA) has had on teacher collegiality in New Zealand. It is an
exploratory study using an in case and cross case method, located in four
secondary schools with a range of demographics. I was interested in gathering
the information from teachers in three key roles: Assistant teacher, Head of
Department and Principal's Nominee, finding out what their views were on the
change that the NCEA has bought to their professional lives and the impact made
on their collegiality. The literature reviewed shows there is an international
appreciation of the value of collegiality in schools but there is a fragile nature of
collegiality that challenges its strength. The complexity of school culture and the
symbiotic relationship between it and collegiality contributes to challenge of the
management and development in secondary schools. The findings showed the
teachers in this study considered there to have been a deepening in collegiality as
a result of increased sharing of material, professional communication through
moderation and professional development, and a heightened respect for
professional practice and understanding of personalities. There are threats from
reduced socialisation, workload, loss of autonomy and the fragility of collegiality.
These elements have created a shift in school culture. How teacher collegiality
can best be supported using this assessment policy has been explored with
features involving school organisation and increasing deep collegial activities
such as collegial observation, marking, moderating and review being identified as
beneficial.

text: The impact of the NCEA on teacher collegiality This study looks at the impact that the National Certification of Educational
Achievement (NCEA) has had on teacher collegiality in New Zealand. It is an
exploratory study using an in case and cross case method, located in four
secondary schools with a range of demographics. I was interested in gathering
the information from teachers in three key roles: Assistant teacher, Head of
Department and Principal's Nominee, finding out what their views were on the
change that the NCEA has bought to their professional lives and the impact made
on their collegiality. The literature reviewed shows there is an international
appreciation of the value of collegiality in schools but there is a fragile nature of
collegiality that challenges its strength. The complexity of school culture and the
symbiotic relationship between it and collegiality contributes to challenge of the
management and development in secondary schools. The findings showed the
teachers in this study considered there to have been a deepening in collegiality as
a result of increased sharing of material, professional communication through
moderation and professional development, and a heightened respect for
professional practice and understanding of personalities. There are threats from
reduced socialisation, workload, loss of autonomy and the fragility of collegiality.
These elements have created a shift in school culture. How teacher collegiality
can best be supported using this assessment policy has been explored with
features involving school organisation and increasing deep collegial activities
such as collegial observation, marking, moderating and review being identified as
beneficial.

year: 2008

title: Taking quality work to a new brilliance: Tama Ma on tour [Review]

authors: Crawford, Terri Ripeka

subjects: Tama Ma

abstract: Choreographers: Taiaroa Royal and Taane Mete; Douglas Wright; Michael Parmenter  Okareka Dance Company at Telecom Playhouse Theatre, WEL Energy Trust Academy of Performing Arts, Hamilton
From 17 Jun 2009 to 20 Jun 2009 

Reviewed by Terri Ripeka Crawford, 22 Jun 2009.

text: Taking quality work to a new brilliance: Tama Ma on tour [Review] Choreographers: Taiaroa Royal and Taane Mete; Douglas Wright; Michael Parmenter  Okareka Dance Company at Telecom Playhouse Theatre, WEL Energy Trust Academy of Performing Arts, Hamilton
From 17 Jun 2009 to 20 Jun 2009 

Reviewed by Terri Ripeka Crawford, 22 Jun 2009.

year: 2009