title: Combinatorial structural-analytical models for the prediction of the mechanical behaviour of isotropic porous pure metals

authors: Bolzoni, Leandro

abstract: This work provides insight on the prediction of the mechanical behaviour of isotropic porous pure metals using empirical and structural-analytical models and proposes two new combinatorial structural-analytical models for the estimation of the mechanical properties. Porous metals such as foams are advanced engineering materials and therefore the prediction of their properties for their optimisation is beneficial. Nevertheless, the estimation of their mechanical behaviour generally relies on semi-empirical models, which are limited to specific materials (i.e. type of metal + type of internal structure + individual property) and for which empirical constants need to be determined. Among the available structural-analytical models, which were developed to estimate mathematically equivalent thermophysical properties, the Symmetric and Interconnected Skeleton Structural (SISS) model gives the best prediction over a broad range of volume fraction of pores (i.e. 0.4–1.0) but always significantly overestimates the elongation to failure. This study presents the derivation of new combinatorial structural-analytical models that are able to rapidly and accurately predict the Young modulus plus ultimate tensile strength and the elongation to failure, respectively, across the entire range of volume fraction of pores. These models have physical bases, are not time- and computing-intensive (thus rapid and low cost), and have reasonable accuracy for materials whose microstructure is uncertain.

text: Combinatorial structural-analytical models for the prediction of the mechanical behaviour of isotropic porous pure metals This work provides insight on the prediction of the mechanical behaviour of isotropic porous pure metals using empirical and structural-analytical models and proposes two new combinatorial structural-analytical models for the estimation of the mechanical properties. Porous metals such as foams are advanced engineering materials and therefore the prediction of their properties for their optimisation is beneficial. Nevertheless, the estimation of their mechanical behaviour generally relies on semi-empirical models, which are limited to specific materials (i.e. type of metal + type of internal structure + individual property) and for which empirical constants need to be determined. Among the available structural-analytical models, which were developed to estimate mathematically equivalent thermophysical properties, the Symmetric and Interconnected Skeleton Structural (SISS) model gives the best prediction over a broad range of volume fraction of pores (i.e. 0.4–1.0) but always significantly overestimates the elongation to failure. This study presents the derivation of new combinatorial structural-analytical models that are able to rapidly and accurately predict the Young modulus plus ultimate tensile strength and the elongation to failure, respectively, across the entire range of volume fraction of pores. These models have physical bases, are not time- and computing-intensive (thus rapid and low cost), and have reasonable accuracy for materials whose microstructure is uncertain.

year: 2021

title: The Pacific infants performance scale: some preliminary and comparative New Zealand studies

authors: St George, Alison Margaret

abstract: The study and measurement of abilities in young children has been a field of early and continuing interest in psychology. Within this field it is possible to discern several major areas of inquiry. 
In attempting to draw up a schema of sorts it can be seen, first of all, that there have been many studies which broadly fall into the category of ' Developmental '. These studies have dealt with aspects of child development such as physical growth, motor development, perceptual development and so on (e.g. Birch & Lefford, 1967; Brozek, 1970; Gliner, Pick, Pick & Hales, 1969). 
Secondly, there have been what might be called 'Social Development ' studies, concerned with acquisition of various behaviours such as communication skills necessary for harmonious group behaviour, and the learning of appropriate roles (e.g. Baldwin, Baldwin, Hilton & Lambert, 1969; Selman, 1971). Many of these studies have been influenced by theories and investigations of ' personality development ' in children, particularly the ' child rearing ' studies (e.g. Ritchie & Ritchie, 1970; Sears, Maccoby & Levin, 1957; Whiting and Child, 1953). More recently there have been systematic observational studies of interaction patterns between children and significant others in their milieu.

text: The Pacific infants performance scale: some preliminary and comparative New Zealand studies The study and measurement of abilities in young children has been a field of early and continuing interest in psychology. Within this field it is possible to discern several major areas of inquiry. 
In attempting to draw up a schema of sorts it can be seen, first of all, that there have been many studies which broadly fall into the category of ' Developmental '. These studies have dealt with aspects of child development such as physical growth, motor development, perceptual development and so on (e.g. Birch & Lefford, 1967; Brozek, 1970; Gliner, Pick, Pick & Hales, 1969). 
Secondly, there have been what might be called 'Social Development ' studies, concerned with acquisition of various behaviours such as communication skills necessary for harmonious group behaviour, and the learning of appropriate roles (e.g. Baldwin, Baldwin, Hilton & Lambert, 1969; Selman, 1971). Many of these studies have been influenced by theories and investigations of ' personality development ' in children, particularly the ' child rearing ' studies (e.g. Ritchie & Ritchie, 1970; Sears, Maccoby & Levin, 1957; Whiting and Child, 1953). More recently there have been systematic observational studies of interaction patterns between children and significant others in their milieu.

year: 1972

title: Te Kōtihitihi: Ngā Tuhinga Reo Māori, Putanga 3

authors: Temara, Pou

abstract: Koinei te katoa o te Putanga 3 o te puka hautaka, Te Kōtihitihi.

text: Te Kōtihitihi: Ngā Tuhinga Reo Māori, Putanga 3 Koinei te katoa o te Putanga 3 o te puka hautaka, Te Kōtihitihi.

year: 2016