title: Internal fibre length concentration in a pressure screen

authors: Atkins, Martin John

subjects: pressure screening

abstract: Localised axial consistency profiles within a pressure screen of a Pinus Radiata kraft pulp are reported. Axial Samples were also analysed using a Kajaani FS-200 to obtain fibre length distribution data. Localised consistency in the feed annulus was found to vary considerably and the consistency was found to be less than the feed consistency over some portions of the screen (annular dilution). Changes in consistency along the accept side was fairly constant although subtle changes were observed. 
Pulp passage ratios for both the bulk and individual fibre length fractions were calculated using the consistency profiles and fibre length data. In all cases fibre passage decreased along the screen length. Fibre passage was affected by a position effect which is comprised of two factors: flocculation effects, and flow and rotor effects. Fibre fractionation efficiency was found to increase along the length of the screen. 
Mechanisms that account for the observed annular dilution, passage ratio and efficiency changes are proposed. These involve flow of both fluid and fibre in the forward and reverse directions across the screen plate, increased flocculation in the feed annulus and the slip velocity between incoming pulp and the rotor tip.

text: Internal fibre length concentration in a pressure screen Localised axial consistency profiles within a pressure screen of a Pinus Radiata kraft pulp are reported. Axial Samples were also analysed using a Kajaani FS-200 to obtain fibre length distribution data. Localised consistency in the feed annulus was found to vary considerably and the consistency was found to be less than the feed consistency over some portions of the screen (annular dilution). Changes in consistency along the accept side was fairly constant although subtle changes were observed. 
Pulp passage ratios for both the bulk and individual fibre length fractions were calculated using the consistency profiles and fibre length data. In all cases fibre passage decreased along the screen length. Fibre passage was affected by a position effect which is comprised of two factors: flocculation effects, and flow and rotor effects. Fibre fractionation efficiency was found to increase along the length of the screen. 
Mechanisms that account for the observed annular dilution, passage ratio and efficiency changes are proposed. These involve flow of both fluid and fibre in the forward and reverse directions across the screen plate, increased flocculation in the feed annulus and the slip velocity between incoming pulp and the rotor tip.

year: 2007

title: Developing young children's understanding of place-value using multiplication and quotitive division

authors: Young-Loveridge, Jennifer

abstract: This paper focuses on selected findings from a study that explored the use of multiplication and division with 34 five- and six-year-old children from diverse cultural and linguistic backgrounds. The focus of instructional tasks was on working with groups of ten to support the understanding of place value. Findings from relevant assessment tasks and children’s work highlighted the importance of encouraging young children to move from unitary (counting by ones) to tens-structured thinking.

text: Developing young children's understanding of place-value using multiplication and quotitive division This paper focuses on selected findings from a study that explored the use of multiplication and division with 34 five- and six-year-old children from diverse cultural and linguistic backgrounds. The focus of instructional tasks was on working with groups of ten to support the understanding of place value. Findings from relevant assessment tasks and children’s work highlighted the importance of encouraging young children to move from unitary (counting by ones) to tens-structured thinking.

year: 2014

title: Tōku tūrangawaewae: Culture, identity, and belonging for Māori homeless people

authors: Groot, Shiloh Ann Maree

subjects: Māori

abstract: To be Māori is to have a tūrangawaewae (a place of strength and belonging, a place to stand). If so, is it conceivable that Māori are homeless in our own homeland? This presentation focuses on the experiences of two Māori homeless people who took part in a 3-year research project conducted in partnership with not-for-profit service agencies. Previous research into street homelessness has all but ignored indigenous histories, circumstances and worldviews. The situation in which indigenous people find themselves requires us to rethink how we understand homelessness and the development of culturally based roles and identities on the street and beyond.

text: Tōku tūrangawaewae: Culture, identity, and belonging for Māori homeless people To be Māori is to have a tūrangawaewae (a place of strength and belonging, a place to stand). If so, is it conceivable that Māori are homeless in our own homeland? This presentation focuses on the experiences of two Māori homeless people who took part in a 3-year research project conducted in partnership with not-for-profit service agencies. Previous research into street homelessness has all but ignored indigenous histories, circumstances and worldviews. The situation in which indigenous people find themselves requires us to rethink how we understand homelessness and the development of culturally based roles and identities on the street and beyond.

year: 2010