title: Displaying 3D images: algorithms for single image random dot stereograms

authors: Witten, Ian H.

abstract: This paper describes how to generate a single image which, when viewed in the appropriate way, appears to the brain as a 3D scene. The image is a stereogram composed of seemingly random dots. A new, simple and symmetric algorithm for generating such images from a solid model is given, along with the design parameters and their influence on the display. The algorithm improves on previously-described ones in several ways: it is symmetric and hence free from directional (right-to-left or left-to-right) bias, it corrects a slight distortion in the rendering of depth, it removes hidden parts of surfaces, and it also eliminates a type of artifact that we call an "echo". Random dot stereograms have one remaining problem: difficulty of initial viewing. If a computer screen rather than paper is used for output, the problem can be ameliorated by shimmering, or time-multiplexing of pixel values. We also describe a simple computational technique for determining what is present in a stereogram so that, if viewing is difficult, one can ascertain what to look for.

text: Displaying 3D images: algorithms for single image random dot stereograms This paper describes how to generate a single image which, when viewed in the appropriate way, appears to the brain as a 3D scene. The image is a stereogram composed of seemingly random dots. A new, simple and symmetric algorithm for generating such images from a solid model is given, along with the design parameters and their influence on the display. The algorithm improves on previously-described ones in several ways: it is symmetric and hence free from directional (right-to-left or left-to-right) bias, it corrects a slight distortion in the rendering of depth, it removes hidden parts of surfaces, and it also eliminates a type of artifact that we call an "echo". Random dot stereograms have one remaining problem: difficulty of initial viewing. If a computer screen rather than paper is used for output, the problem can be ameliorated by shimmering, or time-multiplexing of pixel values. We also describe a simple computational technique for determining what is present in a stereogram so that, if viewing is difficult, one can ascertain what to look for.

year: 1993

title: Supporting students with impairments in higher education: social inclusion or cold comfort?

authors: Claiborne, Lise Bird

subjects: inclusive education

abstract: This paper uses a discursive analysis to examine the experience of ‘inclusion’ from several stakeholder groups in one university. The research team included disability support staff at the institution, external disability consultants and academic researchers. A critical focus group investigation centred on four groups: students who were identified as having an impairment (SWIs), academic staff (teachers), administrators and students who did not identify as having an impairment (non‐SWIs). Interviews had facilitators with both research and disability expertise. Groups recounted different experiences of inclusion. SWIs, drawing on a rights discourse, emphasised a lack of resourcing and barriers created by the teaching staff. In contrast, teachers, administrators and (to a lesser extent) non‐SWIs emphasised the importance of social inclusion, reflecting discourses around needs and humanist notions of care and support, which largely seemed to miss the core of SWI concerns about recognition of their technical competence. For all groups, questions around disclosure of disability were of greater concern than tensions between needs and rights or the recent publication of a Code of Practice for the higher education sector. The findings challenged some of the researchers’ own assumptions, with unexpected implications for practice.

text: Supporting students with impairments in higher education: social inclusion or cold comfort? This paper uses a discursive analysis to examine the experience of ‘inclusion’ from several stakeholder groups in one university. The research team included disability support staff at the institution, external disability consultants and academic researchers. A critical focus group investigation centred on four groups: students who were identified as having an impairment (SWIs), academic staff (teachers), administrators and students who did not identify as having an impairment (non‐SWIs). Interviews had facilitators with both research and disability expertise. Groups recounted different experiences of inclusion. SWIs, drawing on a rights discourse, emphasised a lack of resourcing and barriers created by the teaching staff. In contrast, teachers, administrators and (to a lesser extent) non‐SWIs emphasised the importance of social inclusion, reflecting discourses around needs and humanist notions of care and support, which largely seemed to miss the core of SWI concerns about recognition of their technical competence. For all groups, questions around disclosure of disability were of greater concern than tensions between needs and rights or the recent publication of a Code of Practice for the higher education sector. The findings challenged some of the researchers’ own assumptions, with unexpected implications for practice.

year: 2011

title: 'Freedom’s Ramparts on The Sea': The postcolonial New Zealand landscape and the quest for sustainability

authors: Morad, Munir

subjects: postcolonialism

abstract: New Zealand’s colonial legacy has had a major impact on the shape of its landscape. The European settlement of New Zealand transformed both the land itself as well as the tenure arrangements that had hitherto followed traditional Maori practices. The increasing political influence of the modem conservation movement in New Zealand has been mirrored by a parallel rise in Maori engagement with environmental issues. Land tenure claims brought by the Maori under the 1970’s Treaty of Waitangi Act have enabled an alliance of Maori and environmental interests to be forged. This linkage however is very recent, and if the current unsustainable land use practices are to be mitigated in New Zealand, a synthesis of the essential elements in both cultural traditions is necessary.
Culture shapes how people identify and evaluate elements of their environment, and influences their behaviour and experiences. At a more pragmatic level, culture provides the social infrastructure and institutions that determine how renewable land resources are used and managed. The authors highlight the links between postcolonial culture and landscape management in New Zealand, contrasting Pakeha-Maori points of view and attempting to mediate between these conflicting positions. These links are examined in the context of new social, economic and ecological forces that are shaping the country’s postcolonial landscape.

text: 'Freedom’s Ramparts on The Sea': The postcolonial New Zealand landscape and the quest for sustainability New Zealand’s colonial legacy has had a major impact on the shape of its landscape. The European settlement of New Zealand transformed both the land itself as well as the tenure arrangements that had hitherto followed traditional Maori practices. The increasing political influence of the modem conservation movement in New Zealand has been mirrored by a parallel rise in Maori engagement with environmental issues. Land tenure claims brought by the Maori under the 1970’s Treaty of Waitangi Act have enabled an alliance of Maori and environmental interests to be forged. This linkage however is very recent, and if the current unsustainable land use practices are to be mitigated in New Zealand, a synthesis of the essential elements in both cultural traditions is necessary.
Culture shapes how people identify and evaluate elements of their environment, and influences their behaviour and experiences. At a more pragmatic level, culture provides the social infrastructure and institutions that determine how renewable land resources are used and managed. The authors highlight the links between postcolonial culture and landscape management in New Zealand, contrasting Pakeha-Maori points of view and attempting to mediate between these conflicting positions. These links are examined in the context of new social, economic and ecological forces that are shaping the country’s postcolonial landscape.

year: 2003