title: Evolving triggers for dynamic environments

authors: Trajcevski, Goce

subjects: computer science

abstract: In this work we address the problem of managing the reactive behavior in distributed environments in which data continuously changes over time, where the users may need to explicitly express how the triggers should be (self) modified. To enable this we propose the (ECA)2 – Evolving and Context-Aware Event-Condition-Action paradigm for specifying triggers that capture the desired reactive behavior in databases which manage distributed and continuously changing data. Since both the monitored event and the condition part of the trigger may be continuous in nature, we introduce the concept of metatriggers to coordinate the detection of events and the evaluation of conditions.

text: Evolving triggers for dynamic environments In this work we address the problem of managing the reactive behavior in distributed environments in which data continuously changes over time, where the users may need to explicitly express how the triggers should be (self) modified. To enable this we propose the (ECA)2 – Evolving and Context-Aware Event-Condition-Action paradigm for specifying triggers that capture the desired reactive behavior in databases which manage distributed and continuously changing data. Since both the monitored event and the condition part of the trigger may be continuous in nature, we introduce the concept of metatriggers to coordinate the detection of events and the evaluation of conditions.

year: 2006

title: Vascular functioning and the water balance of ripening kiwifruit (Actinidia chinensis) berries

authors: Clearwater, Michael J.

subjects: Actinidia chinensis

abstract: Indirect evidence suggests that water supply to fleshy fruits during the final stages of development occurs through the phloem, with the xylem providing little water, or acting as a pathway for water loss back to the plant. This inference was tested by examining the water balance and vascular functioning of ripening kiwifruit berries (Actinidia chinensis var. chinensis ‘Hort16A’) exhibiting a pre-harvest ‘shrivel’ disorder in California, and normal development in New Zealand. Dye labelling and mass balance experiments indicated that the xylem and phloem were both functional and contributed approximately equally to the fruit water supply during this stage of development. The modelled fruit water balance was dominated by transpiration, with net water loss under high vapour pressure deficit (Da) conditions in California, but a net gain under cooler New Zealand conditions. Direct measurement of pedicel sap flow under controlled conditions confirmed inward flows in both the phloem and xylem under conditions of both low and high Da. Phloem flows were required for growth, with gradual recovery after a step increase in Da. Xylem flows alone were unable to support growth, but did supply transpiration and were responsive to Da-induced pressure fluctuations. The results suggest that the shrivel disorder was a consequence of a high fruit transpiration rate, and that the perception of complete loss or reversal of inward xylem flows in ripening fruits should be re-examined.

text: Vascular functioning and the water balance of ripening kiwifruit (Actinidia chinensis) berries Indirect evidence suggests that water supply to fleshy fruits during the final stages of development occurs through the phloem, with the xylem providing little water, or acting as a pathway for water loss back to the plant. This inference was tested by examining the water balance and vascular functioning of ripening kiwifruit berries (Actinidia chinensis var. chinensis ‘Hort16A’) exhibiting a pre-harvest ‘shrivel’ disorder in California, and normal development in New Zealand. Dye labelling and mass balance experiments indicated that the xylem and phloem were both functional and contributed approximately equally to the fruit water supply during this stage of development. The modelled fruit water balance was dominated by transpiration, with net water loss under high vapour pressure deficit (Da) conditions in California, but a net gain under cooler New Zealand conditions. Direct measurement of pedicel sap flow under controlled conditions confirmed inward flows in both the phloem and xylem under conditions of both low and high Da. Phloem flows were required for growth, with gradual recovery after a step increase in Da. Xylem flows alone were unable to support growth, but did supply transpiration and were responsive to Da-induced pressure fluctuations. The results suggest that the shrivel disorder was a consequence of a high fruit transpiration rate, and that the perception of complete loss or reversal of inward xylem flows in ripening fruits should be re-examined.

year: 2011

title: Maori children : Conceptions of Death and Tangihanga

authors: Jacob, Juanita Emily

subjects: Maori

abstract: Research pertaining to Maori children‟s experiences and perceptions of death and tangihanga is sparse. Much of what is available, relating to children and their experiences with death, particularly death of a loved one, is generalised and stems from Western paradigms of knowledge. In contrast, this study aimed to investigate Maori children‟s experience relating to death and tangi through the eyes of Maori parents. Five areas were explored with Maori parents: (1) childhood experiences of Maori parents relating to death and tangi, (2) parental conceptualisation pertaining to ideas of an afterlife (3) how and when Maori parents talk with children about topics relating to death, tangi and an afterlife (4) how Maori children understand and conceptualise these events, and (5) how these practices will continue on in the future. Findings of this study suggest that Maori children: (a) received abundant support from kinship networks to help them cope with their grief, (b) they were included and involved in all aspects relating to death and tangi, (c) they were encouraged to express emotions openly and without restraint, (d) they understood and comprehended death through personal experience and exposure to tangi, (e) the business of grieving came secondary to the fact that tangi was more like a holiday with family, (f) Maori parents informed and talked to their children about death and tangi, and (g) they often use both Christian ideologies and cultural beliefs to explained death and afterlife to their children. From this study we learn that death was not hidden from children, that parents talked with their children in very open and age relevant ways, and considered their children‟s participation in tangi as an important way to grieve and ensure continuity with kinship networks and support. This study suggests that the challenge now is to ensure that these practices continue to persist between parents and their children, and continue on through generations.

text: Maori children : Conceptions of Death and Tangihanga Research pertaining to Maori children‟s experiences and perceptions of death and tangihanga is sparse. Much of what is available, relating to children and their experiences with death, particularly death of a loved one, is generalised and stems from Western paradigms of knowledge. In contrast, this study aimed to investigate Maori children‟s experience relating to death and tangi through the eyes of Maori parents. Five areas were explored with Maori parents: (1) childhood experiences of Maori parents relating to death and tangi, (2) parental conceptualisation pertaining to ideas of an afterlife (3) how and when Maori parents talk with children about topics relating to death, tangi and an afterlife (4) how Maori children understand and conceptualise these events, and (5) how these practices will continue on in the future. Findings of this study suggest that Maori children: (a) received abundant support from kinship networks to help them cope with their grief, (b) they were included and involved in all aspects relating to death and tangi, (c) they were encouraged to express emotions openly and without restraint, (d) they understood and comprehended death through personal experience and exposure to tangi, (e) the business of grieving came secondary to the fact that tangi was more like a holiday with family, (f) Maori parents informed and talked to their children about death and tangi, and (g) they often use both Christian ideologies and cultural beliefs to explained death and afterlife to their children. From this study we learn that death was not hidden from children, that parents talked with their children in very open and age relevant ways, and considered their children‟s participation in tangi as an important way to grieve and ensure continuity with kinship networks and support. This study suggests that the challenge now is to ensure that these practices continue to persist between parents and their children, and continue on through generations.

year: 2011