title: Grain growth and kinetics for nanocrystalline magnesium alloy produced by mechanical alloying

authors: Cao, Peng

subjects: alloys

abstract: A study on the kinetics of grain growth of an Mg-12.1 wt%Cu alloy produced by mechanical alloying was carried out. The grain sizes of as-mechanically alloyed powder and of cold-compacted annealed powder were determined from the broadening of X-ray lines. The grain size deceases initially due to recrystallization and then increases gradually, and finally ceases to reach an ultimate value regardless of annealing time. From isothermal anneals, the grain growth kinetics can be described by Dn − D0n = ct, where n (n = 5 to 8) is a constant essentially dependent on the annealing temperature. The activation energy for grain growth Q has been determined to be 118 kJ/mol, which is longer by 26 kJ/mol than that for pure magnesium. Second-phase intermetallic particle Mg2Cu produced during ball-milling influences not only on activation energy but also on exponent of the kinetic equation.

text: Grain growth and kinetics for nanocrystalline magnesium alloy produced by mechanical alloying A study on the kinetics of grain growth of an Mg-12.1 wt%Cu alloy produced by mechanical alloying was carried out. The grain sizes of as-mechanically alloyed powder and of cold-compacted annealed powder were determined from the broadening of X-ray lines. The grain size deceases initially due to recrystallization and then increases gradually, and finally ceases to reach an ultimate value regardless of annealing time. From isothermal anneals, the grain growth kinetics can be described by Dn − D0n = ct, where n (n = 5 to 8) is a constant essentially dependent on the annealing temperature. The activation energy for grain growth Q has been determined to be 118 kJ/mol, which is longer by 26 kJ/mol than that for pure magnesium. Second-phase intermetallic particle Mg2Cu produced during ball-milling influences not only on activation energy but also on exponent of the kinetic equation.

year: 2001

title: Video-recording for therapeutic purposes in couple counselling

authors: Depree, Jim

subjects: couples

abstract: The challenges of producing fair and respectful relationships sometimes takes couples to counselling. Problematic and taken-for-granted, individualistic, adversarial and gendered discursive practices continue to get in the way of fair and respectful relationships, with studies showing that in heterosexual relationships women are often expected to do most of the work required to maintain and repair couple relationships which continue to centre men’s experiences. When couples get to counselling, counsellors may also struggle to address individualistic and gendered relational processes and, may reproduce them despite their best intentions. In response, narrative therapists work with clients to externalise and deconstruct discursive practices to make visible the operation of power in relationships and to make available other readings, ways of being and identities, which better position members of a couple to collaborate in order to produce solutions. This study employed narrative therapy co-research and video technology in order to investigate the researcher’s own narrative therapy counselling practice with couples. Three couples, all heterosexual, in marriage or marriage-like relationships, were recruited from the researcher’s counselling practice. Together the couples and researcher reviewed and co-researched the video records of the counselling meetings. Practices of co-research with video made visible and unfamiliar some previously unseen and taken-for-granted territories of life. Co-research of these territories generated understandings and proposals for action, which the couples then experimented with and reviewed. As well, the couples all began to imagine how their actions might appear on video and to adjust their actions and thinking to better fit with their values. The video records also provided a text for further deconstructive analysis. Within the counselling, re-membering conversations, taking-it-back practices and definitional ceremonies, were employed and enhanced by using the video in order to support preferred developments and to strengthen the contributions of children, family and communities to the couples’ preferred ways of being. This approach was used to investigate: the ways the couples shared and conducted their conversations in counselling; their parenting; an anger problem; and the sharing of property and income. Ongoing analysis of the video records and transcripts developed and extended the theoretical tools available in the moments of the counselling, producing a richer telling of a practice that was effective at the time. This retelling involved thinking with Derrida and deconstruction as justice in order to cast counselling as an hospitable, collaborative process of co-research which has as its focus addressing justice in the complex, relational, gendered, cultural and contextual territories in which couples’ relationships are played out. The thesis argues that the positioning of counsellor and couples as co-researchers, using hospitable and deconstructive perspectives, greatly reduced conflict and equipped the counsellor and couples to review and research their own experiences, and to collaborate in order to produce more effective problem solving strategies, which addressed their situations and their hopes for justice.

text: Video-recording for therapeutic purposes in couple counselling The challenges of producing fair and respectful relationships sometimes takes couples to counselling. Problematic and taken-for-granted, individualistic, adversarial and gendered discursive practices continue to get in the way of fair and respectful relationships, with studies showing that in heterosexual relationships women are often expected to do most of the work required to maintain and repair couple relationships which continue to centre men’s experiences. When couples get to counselling, counsellors may also struggle to address individualistic and gendered relational processes and, may reproduce them despite their best intentions. In response, narrative therapists work with clients to externalise and deconstruct discursive practices to make visible the operation of power in relationships and to make available other readings, ways of being and identities, which better position members of a couple to collaborate in order to produce solutions. This study employed narrative therapy co-research and video technology in order to investigate the researcher’s own narrative therapy counselling practice with couples. Three couples, all heterosexual, in marriage or marriage-like relationships, were recruited from the researcher’s counselling practice. Together the couples and researcher reviewed and co-researched the video records of the counselling meetings. Practices of co-research with video made visible and unfamiliar some previously unseen and taken-for-granted territories of life. Co-research of these territories generated understandings and proposals for action, which the couples then experimented with and reviewed. As well, the couples all began to imagine how their actions might appear on video and to adjust their actions and thinking to better fit with their values. The video records also provided a text for further deconstructive analysis. Within the counselling, re-membering conversations, taking-it-back practices and definitional ceremonies, were employed and enhanced by using the video in order to support preferred developments and to strengthen the contributions of children, family and communities to the couples’ preferred ways of being. This approach was used to investigate: the ways the couples shared and conducted their conversations in counselling; their parenting; an anger problem; and the sharing of property and income. Ongoing analysis of the video records and transcripts developed and extended the theoretical tools available in the moments of the counselling, producing a richer telling of a practice that was effective at the time. This retelling involved thinking with Derrida and deconstruction as justice in order to cast counselling as an hospitable, collaborative process of co-research which has as its focus addressing justice in the complex, relational, gendered, cultural and contextual territories in which couples’ relationships are played out. The thesis argues that the positioning of counsellor and couples as co-researchers, using hospitable and deconstructive perspectives, greatly reduced conflict and equipped the counsellor and couples to review and research their own experiences, and to collaborate in order to produce more effective problem solving strategies, which addressed their situations and their hopes for justice.

year: 2016

title: Introducing the Draft Learning Progression Framework for Maori in the New Zealand Curriculum

authors: Crombie, Winifred

subjects: Māori education

abstract: This paper introduces the draft Learning Progression Framework for Māori in mainstream schools which we prepared in the first half of 2003 for the New Zealand Ministry of Education. Readers are invited to contact the authors if they wish to make any suggestions in relation to the final content of the document.

text: Introducing the Draft Learning Progression Framework for Maori in the New Zealand Curriculum This paper introduces the draft Learning Progression Framework for Māori in mainstream schools which we prepared in the first half of 2003 for the New Zealand Ministry of Education. Readers are invited to contact the authors if they wish to make any suggestions in relation to the final content of the document.

year: 2003-09