title: Proof of concept of diffuse optical tomography using time-of-flight range imaging cameras

authors: Hassan, Ahmad

subjects: diffuse optical tomography

abstract: Diffuse optical tomography is an optical technique to create 3-dimensional images of the inside of highly scattering material. Research groups around the world have been developing imaging systems using various source-detector arrangements to determine optical properties of biological tissue with a focus on medical applications. In this paper we investigate whether a range imaging camera can be used as a detector array. We used time-of-flight range imaging cameras instead of the conventional source-detector array used by others. The results provided in this paper show reconstructed images of absorption and reduced scattering of an object submerged in a tissue simulating phantom. Using the ranging camera XZ422 Demonstrator and the NIRFAST software package, we reconstructed 2D images of a 6 mm metal rod submerged in the centre of a 5 cm deep tank filled with 1% IntralipidTM. We have shown for the first time that range imaging cameras can replace the traditional detectors in diffuse optical tomography.

text: Proof of concept of diffuse optical tomography using time-of-flight range imaging cameras Diffuse optical tomography is an optical technique to create 3-dimensional images of the inside of highly scattering material. Research groups around the world have been developing imaging systems using various source-detector arrangements to determine optical properties of biological tissue with a focus on medical applications. In this paper we investigate whether a range imaging camera can be used as a detector array. We used time-of-flight range imaging cameras instead of the conventional source-detector array used by others. The results provided in this paper show reconstructed images of absorption and reduced scattering of an object submerged in a tissue simulating phantom. Using the ranging camera XZ422 Demonstrator and the NIRFAST software package, we reconstructed 2D images of a 6 mm metal rod submerged in the centre of a 5 cm deep tank filled with 1% IntralipidTM. We have shown for the first time that range imaging cameras can replace the traditional detectors in diffuse optical tomography.

year: 2010

title: Heavy Metal, identity and the social negotiation of a community of practice

authors: Snell, Dave

subjects: psychology

abstract: Psychologists have raised concerns about Heavy Metal music and possible links with substance misuse and youth suicide. This paper moves beyond this traditional disciplinary focus on negative messages to document the media-related practices through which a Heavy Metal community is negotiated. Six participants contributed to ethnographic observations, interviews and photo-voice projects. Results illustrate how socio-material practices such as dressing a certain way, frequenting a bar and dancing are central to community maintenance and the reaffirmation of shared identities. Findings highlight the need for community psychology research to document the material and symbolic nature of contemporary communal life.

text: Heavy Metal, identity and the social negotiation of a community of practice Psychologists have raised concerns about Heavy Metal music and possible links with substance misuse and youth suicide. This paper moves beyond this traditional disciplinary focus on negative messages to document the media-related practices through which a Heavy Metal community is negotiated. Six participants contributed to ethnographic observations, interviews and photo-voice projects. Results illustrate how socio-material practices such as dressing a certain way, frequenting a bar and dancing are central to community maintenance and the reaffirmation of shared identities. Findings highlight the need for community psychology research to document the material and symbolic nature of contemporary communal life.

year: 2007

title: The Digital Divide in New Zealand: The position of Māori and Pacific peoples

authors: Gibson, John

subjects: Māori digital access

abstract: Information and communication technology plays an ever-growing role in economic, political and social life and those who are unable to access such technologies are increasingly disadvantaged. Hence, what has come to be known as the ‘digital divide’ is of considerable significance. Here, indicators of that divide as it affects Māori and Pacific Islands peoples in Aotearoa/New Zealand are presented and discussed.

text: The Digital Divide in New Zealand: The position of Māori and Pacific peoples Information and communication technology plays an ever-growing role in economic, political and social life and those who are unable to access such technologies are increasingly disadvantaged. Hence, what has come to be known as the ‘digital divide’ is of considerable significance. Here, indicators of that divide as it affects Māori and Pacific Islands peoples in Aotearoa/New Zealand are presented and discussed.

year: 2002-09