title: Timing of the late-glacial climate reversal in the Southern Hemisphere using high-resolution radiocarbon chronology for Kaipo bog, New Zealand

authors: Hajdas, Irka

subjects: late-glacial

abstract: The pattern of climate change in the Southern Hemisphere during the Younger Dryas (YD) chronozone provides essential constraint on mechanisms of abrupt climate change only if accurate, high-precision chronologies are obtained. A climate reversal reported previously at Kaipo bog, New Zealand, had been dated between 13,600 and 12,600 cal yr B.P. and appeared to asynchronously overlap the YD chron, but the chronology, based on conventionally radiocarbon-dated bulk sediment samples, left the precise timing questionable. We report a new high-resolution AMS 14C chronology for the Kaipo record that confirms the original chronology and provides further evidence for a mid-latitude Southern Ocean cooling event dated between 13,800 and 12,400 cal yr B.P. (2σ range), roughly equivalent to the Antarctic Cold Reversal.

text: Timing of the late-glacial climate reversal in the Southern Hemisphere using high-resolution radiocarbon chronology for Kaipo bog, New Zealand The pattern of climate change in the Southern Hemisphere during the Younger Dryas (YD) chronozone provides essential constraint on mechanisms of abrupt climate change only if accurate, high-precision chronologies are obtained. A climate reversal reported previously at Kaipo bog, New Zealand, had been dated between 13,600 and 12,600 cal yr B.P. and appeared to asynchronously overlap the YD chron, but the chronology, based on conventionally radiocarbon-dated bulk sediment samples, left the precise timing questionable. We report a new high-resolution AMS 14C chronology for the Kaipo record that confirms the original chronology and provides further evidence for a mid-latitude Southern Ocean cooling event dated between 13,800 and 12,400 cal yr B.P. (2σ range), roughly equivalent to the Antarctic Cold Reversal.

year: 2006-03

title: Comparing static Gantt and mosaic charts for visualization of task schedules

authors: Luz, Saturnino

subjects: computer science

abstract: A mosaic chart has been proposed for representation of events on a timeline. While early studies demonstrated the effectiveness of mosaics in supporting visualization of multimedia records on a meeting browser, the usability of mosaics as a static timeline visualization has not been studied in more general settings. This paper investigates the use of the mosaic charts for visualization of project schedules. A user study was conducted to compare a building project schedule encoded alternatively as a mosaic or as a Gantt chart. Although the study focused on static graphs, for which the Gantt technique is usually very effective, results showed that the users were as fast and accurate at answering the questions using the mosaic representation as they were using Gantt charts. The analysis and experiment indicated algorithmic, space-filling and interpretation limitations of the mosaic technique. We suggest possible design improvements to overcome some of these limitations.

text: Comparing static Gantt and mosaic charts for visualization of task schedules A mosaic chart has been proposed for representation of events on a timeline. While early studies demonstrated the effectiveness of mosaics in supporting visualization of multimedia records on a meeting browser, the usability of mosaics as a static timeline visualization has not been studied in more general settings. This paper investigates the use of the mosaic charts for visualization of project schedules. A user study was conducted to compare a building project schedule encoded alternatively as a mosaic or as a Gantt chart. Although the study focused on static graphs, for which the Gantt technique is usually very effective, results showed that the users were as fast and accurate at answering the questions using the mosaic representation as they were using Gantt charts. The analysis and experiment indicated algorithmic, space-filling and interpretation limitations of the mosaic technique. We suggest possible design improvements to overcome some of these limitations.

year: 2011

title: Older men gardening on the marae: Everyday practices for being Māori

authors: King, Pita

subjects: manaakitanga

abstract: Like indigenous peoples globally, Māori are over- represented among the homeless population due to processes of colonialism, disruptions and continued socio- economic marginalization. This article explores how, through gardening and other everyday practices, a group of older Māori men who are homeless find respite, reconnection, a sense of belonging, and remember Māori ways of being. We consider how the regular participation of these men also contributes to the reconciliation of the marae (communal complex used for everyday Māori life) space that has been reclaimed by Ngāti Whātua (local Auckland tribe) after a lengthy hiatus. Our analysis foregrounds the importance of core values of manaakitanga (care for others), whanaungatanga (relationships based on shared experience or kinship) and wairuatanga (spirituality) for responses to Māori homelessness.

text: Older men gardening on the marae: Everyday practices for being Māori Like indigenous peoples globally, Māori are over- represented among the homeless population due to processes of colonialism, disruptions and continued socio- economic marginalization. This article explores how, through gardening and other everyday practices, a group of older Māori men who are homeless find respite, reconnection, a sense of belonging, and remember Māori ways of being. We consider how the regular participation of these men also contributes to the reconciliation of the marae (communal complex used for everyday Māori life) space that has been reclaimed by Ngāti Whātua (local Auckland tribe) after a lengthy hiatus. Our analysis foregrounds the importance of core values of manaakitanga (care for others), whanaungatanga (relationships based on shared experience or kinship) and wairuatanga (spirituality) for responses to Māori homelessness.

year: 2015