title: Machine learning and statistics: a matter of perspective

authors: Cunningham, Sally Jo

subjects: computer science

abstract: Information has become an important commercial commodity-indeed, possibly the most important product of the future. While we have well-developed technologies to store data, the analysis to extract information is time-consuming and requires skilled human intervention. Machine learning algorithms augment statistical analysis by providing mechanisms that automate the information discovery process. These algorithms also tend to be more accessible to end-users and domain experts. The two analysis methods are converging, and the fields have much to offer each other.

text: Machine learning and statistics: a matter of perspective Information has become an important commercial commodity-indeed, possibly the most important product of the future. While we have well-developed technologies to store data, the analysis to extract information is time-consuming and requires skilled human intervention. Machine learning algorithms augment statistical analysis by providing mechanisms that automate the information discovery process. These algorithms also tend to be more accessible to end-users and domain experts. The two analysis methods are converging, and the fields have much to offer each other.

year: 1995-04

title: Effect of spacers on axial capacity of cold-formed steel back-to-back gapped channel sections

authors: Divi, Seshagiri Rao

abstract: The use of cold-formed steel (CFS) gapped back-to-back channel sections is becoming popular, especially in New Zealand and South-East Asia. Introducing a gap between the back-to-back channels enhances resistance to lateral-torsional buckling. Previous research has investigated gapped built-up channel sections with spacers but hasn't determined the optimal number of spacers relative to length. Also, little attention has been given to how transverse spacing affects the axial capacity of these sections. This study fills those gaps by developing and validating a non-linear elastoplastic finite element (FE) model against experimental data. A parametric study of 1000 FE models examine the effects of column length, CFS section thickness, materials properties, and spacer spacing, on the axial capacity of gapped built-up columns. Key findings include: (1) Up to a column length of 4000 mm, three equally spaced spacers optimize compressive strength in gapped sections. (2) Optimal transverse spacing aligns with the channel web depth, offering no significant strength increase beyond 1.5 times the web depth. (3) Gapped sections show a substantial average increase (424%) in compressive strength over single-channel configurations, and a moderate improvement (125%) compared to non-gapped built-up sections. (4) FEA results closely match the predictions of AS/NZS4600:2018, differing by only 5% in compressive strength.

text: Effect of spacers on axial capacity of cold-formed steel back-to-back gapped channel sections The use of cold-formed steel (CFS) gapped back-to-back channel sections is becoming popular, especially in New Zealand and South-East Asia. Introducing a gap between the back-to-back channels enhances resistance to lateral-torsional buckling. Previous research has investigated gapped built-up channel sections with spacers but hasn't determined the optimal number of spacers relative to length. Also, little attention has been given to how transverse spacing affects the axial capacity of these sections. This study fills those gaps by developing and validating a non-linear elastoplastic finite element (FE) model against experimental data. A parametric study of 1000 FE models examine the effects of column length, CFS section thickness, materials properties, and spacer spacing, on the axial capacity of gapped built-up columns. Key findings include: (1) Up to a column length of 4000 mm, three equally spaced spacers optimize compressive strength in gapped sections. (2) Optimal transverse spacing aligns with the channel web depth, offering no significant strength increase beyond 1.5 times the web depth. (3) Gapped sections show a substantial average increase (424%) in compressive strength over single-channel configurations, and a moderate improvement (125%) compared to non-gapped built-up sections. (4) FEA results closely match the predictions of AS/NZS4600:2018, differing by only 5% in compressive strength.

year: 2024

title: The processes involved in formulating a marae-based Māori language regeneration plan for Whakamārama marae: Outline, analysis and evaluation

authors: Lewis, Roger

subjects: New Zealand

abstract: We provide here a criterion referenced evaluation of the processes involved in the creation of a Māori language regeneration strategy for Whakamārama marae. Working voluntarily and often under difficult circumstances, core group members demonstrated that they possessed the essential characteristics of commitment, motivation and determination. In addition, they demonstrated the willingness and ability to use existing skills and knowledge effectively and to develop further skills and knowledge as the project proceeded. Perhaps most important, they developed a caring and effective working culture. However, the weaknesses of the project included a lack of preparation and planning prior to the commencement of the project which led to delays in producing outcomes and some loss of momentum. This also led, indirectly, to the views of two or three members of the core group being overrepresented in the language planning goals. We believe that the information and analysis provided here are likely to be of interest to any language community involved in micro-level language regeneration activities of a similar type.

text: The processes involved in formulating a marae-based Māori language regeneration plan for Whakamārama marae: Outline, analysis and evaluation We provide here a criterion referenced evaluation of the processes involved in the creation of a Māori language regeneration strategy for Whakamārama marae. Working voluntarily and often under difficult circumstances, core group members demonstrated that they possessed the essential characteristics of commitment, motivation and determination. In addition, they demonstrated the willingness and ability to use existing skills and knowledge effectively and to develop further skills and knowledge as the project proceeded. Perhaps most important, they developed a caring and effective working culture. However, the weaknesses of the project included a lack of preparation and planning prior to the commencement of the project which led to delays in producing outcomes and some loss of momentum. This also led, indirectly, to the views of two or three members of the core group being overrepresented in the language planning goals. We believe that the information and analysis provided here are likely to be of interest to any language community involved in micro-level language regeneration activities of a similar type.

year: 2008