title: Beyond trees: Adopting MITI to learn rules and ensemble classifiers for multi-instance data

authors: Bjerring, Luke

subjects: computer science

abstract: MITI is a simple and elegant decision tree learner designed for multi-instance classification problems, where examples for learning consist of bags of instances. MITI grows a tree in best-first manner by maintaining a priority queue containing the unexpanded nodes in the fringe of the tree. When the head node contains instances from positive examples only, it is made into a leaf, and any bag of data that is associated with this leaf is removed. In this paper we first revisit the basic algorithm and consider the effect of parameter settings on classification accuracy, using several benchmark datasets. We show that the chosen splitting criterion in particular can have a significant effect on accuracy. We identify a potential weakness of the algorithm—subtrees can contain structure that has been created using data that is subsequently removed—and show that a simple modification turns the algorithm into a rule learner that avoids this problem. This rule learner produces more compact classifiers with comparable accuracy on the benchmark datasets we consider. Finally, we present randomized algorithm variants that enable us to generate ensemble classifiers. We show that these can yield substantially improved classification accuracy.

text: Beyond trees: Adopting MITI to learn rules and ensemble classifiers for multi-instance data MITI is a simple and elegant decision tree learner designed for multi-instance classification problems, where examples for learning consist of bags of instances. MITI grows a tree in best-first manner by maintaining a priority queue containing the unexpanded nodes in the fringe of the tree. When the head node contains instances from positive examples only, it is made into a leaf, and any bag of data that is associated with this leaf is removed. In this paper we first revisit the basic algorithm and consider the effect of parameter settings on classification accuracy, using several benchmark datasets. We show that the chosen splitting criterion in particular can have a significant effect on accuracy. We identify a potential weakness of the algorithm—subtrees can contain structure that has been created using data that is subsequently removed—and show that a simple modification turns the algorithm into a rule learner that avoids this problem. This rule learner produces more compact classifiers with comparable accuracy on the benchmark datasets we consider. Finally, we present randomized algorithm variants that enable us to generate ensemble classifiers. We show that these can yield substantially improved classification accuracy.

year: 2011

title: Pedalling on: An autoethnographical journey of creative discovery

authors: Dunlop, Jonathan

abstract: My research is about exploring ways to use the sustain pedal in works by CPE Bach, JC Bach, 
Haydn and Mozart specifically. During their lifetimes, pedalling was considered to be a novelty 
on the fortepiano and was not seriously notated in the detailed style of later composers such as 
Beethoven and Schumann. 

The thesis explores ways to use the sustain pedal in keyboard works by CPE Bach, JC Bach, 
Haydn and Mozart, and also early Romantic Period composers like Beethoven, Schumann and 
Schubert. This artistic exploration is shaped and documented using an autoethnographic 
methodology, and the repertoire showcased in each recital is a mix of solo and chamber music. 
At the centre of this research is Carl Philipp Emanuel Bach’s treatise on keyboard playing 
entitled Essay on the True Art of Playing Keyboard Instruments from 1753. In it, Bach states 
that “the undamped register of the pianoforte is the most pleasing and, once the performer 
learns to observe the necessary precautions in the face of its reverberations, the most delightful 
for improvisation.

text: Pedalling on: An autoethnographical journey of creative discovery My research is about exploring ways to use the sustain pedal in works by CPE Bach, JC Bach, 
Haydn and Mozart specifically. During their lifetimes, pedalling was considered to be a novelty 
on the fortepiano and was not seriously notated in the detailed style of later composers such as 
Beethoven and Schumann. 

The thesis explores ways to use the sustain pedal in keyboard works by CPE Bach, JC Bach, 
Haydn and Mozart, and also early Romantic Period composers like Beethoven, Schumann and 
Schubert. This artistic exploration is shaped and documented using an autoethnographic 
methodology, and the repertoire showcased in each recital is a mix of solo and chamber music. 
At the centre of this research is Carl Philipp Emanuel Bach’s treatise on keyboard playing 
entitled Essay on the True Art of Playing Keyboard Instruments from 1753. In it, Bach states 
that “the undamped register of the pianoforte is the most pleasing and, once the performer 
learns to observe the necessary precautions in the face of its reverberations, the most delightful 
for improvisation.

year: 2024-05-29

title: Early intervention services: Effectively supporting Maori children and their families

authors: Berryman, Mere

subjects: Early Childhood

abstract: This paper examines Early Intervention (EI) service provision from within one Ministry of Education region in New Zealand. It does this in order to better understand what works well and what needs to change if children from Maori families, of Early Childhood age, are to be provided with the most effective EI services. By engaging with Maori families in group-focused interviews-asconversation, and then with their service providers, about their experiences of working together, researchers learned about what could provide effective services for other Maori families in similar situations.

text: Early intervention services: Effectively supporting Maori children and their families This paper examines Early Intervention (EI) service provision from within one Ministry of Education region in New Zealand. It does this in order to better understand what works well and what needs to change if children from Maori families, of Early Childhood age, are to be provided with the most effective EI services. By engaging with Maori families in group-focused interviews-asconversation, and then with their service providers, about their experiences of working together, researchers learned about what could provide effective services for other Maori families in similar situations.

year: 2011