title: Experiences with a weighted decision tree learner

authors: Cleary, John G.

subjects: computer science

abstract: Machine learning algorithms for inferring decision trees typically choose a single “best” tree to describe the training data. Recent research has shown that classification performance can be significantly improved by voting predictions of multiple, independently produced decision trees. This paper describes an algorithm, OB1, that makes a weighted sum over many possible models. We describe one instance of OB1, that includes all possible decision trees as well as naïve Bayesian models. OB1 is compared with a number of other decision tree and instance based learning algorithms on some of the data sets from the UCI repository. Both an information gain and an accuracy measure are used for the comparison. On the information gain measure OB1 performs significantly better than all the other algorithms. On the accuracy measure it is significantly better than all the algorithms except naïve Bayes which performs comparably to OB1.

text: Experiences with a weighted decision tree learner Machine learning algorithms for inferring decision trees typically choose a single “best” tree to describe the training data. Recent research has shown that classification performance can be significantly improved by voting predictions of multiple, independently produced decision trees. This paper describes an algorithm, OB1, that makes a weighted sum over many possible models. We describe one instance of OB1, that includes all possible decision trees as well as naïve Bayesian models. OB1 is compared with a number of other decision tree and instance based learning algorithms on some of the data sets from the UCI repository. Both an information gain and an accuracy measure are used for the comparison. On the information gain measure OB1 performs significantly better than all the other algorithms. On the accuracy measure it is significantly better than all the algorithms except naïve Bayes which performs comparably to OB1.

year: 1998-05

title: Conquering the Virtual Public': Jean-Paul Sartre's La tribune des temps modernes and the Radio in France

authors: Moody, A

subjects: Literary Criticism

abstract: On the evening of Monday, 21 October 1947, La Tribune de Paris – a daily radio programme that provided a forum for discussion and analysis of current events – gave over its nightly news review, from 8:30 to 8:50, to ‘Jean-Paul Sartre et ses collaborateurs’. This new programme, scheduled to run weekly on Monday evenings, was La tribune des temps modernes. Sartre’s ‘collaborateurs’ were a rotating group of fellow editors of his journal, Les temps modernes, for which the radio programme was named. They included Simone de Beauvoir and Maurice Merleau-Ponty as regulars, alongside important contributions from Jean Pouillon, Jean-Bertrand Pontalis and Alain Bonafé. Structured as a semiscripted discussion, La tribune des temps modernes ran in the regular weekly slot for six weeks, before being abruptly cancelled in December, following a controversial run and – probably crucially – a change of government.

text: Conquering the Virtual Public': Jean-Paul Sartre's La tribune des temps modernes and the Radio in France On the evening of Monday, 21 October 1947, La Tribune de Paris – a daily radio programme that provided a forum for discussion and analysis of current events – gave over its nightly news review, from 8:30 to 8:50, to ‘Jean-Paul Sartre et ses collaborateurs’. This new programme, scheduled to run weekly on Monday evenings, was La tribune des temps modernes. Sartre’s ‘collaborateurs’ were a rotating group of fellow editors of his journal, Les temps modernes, for which the radio programme was named. They included Simone de Beauvoir and Maurice Merleau-Ponty as regulars, alongside important contributions from Jean Pouillon, Jean-Bertrand Pontalis and Alain Bonafé. Structured as a semiscripted discussion, La tribune des temps modernes ran in the regular weekly slot for six weeks, before being abruptly cancelled in December, following a controversial run and – probably crucially – a change of government.

year: 2014

title: The source, composition and typology of ‘Limestone’ Adzes from Eastern North Island, New Zealand

authors: Nelson, Campbell S.

subjects: adzes

abstract: Collections of stone adzes (toki) from the eastern North Island of New Zealand include a number of typologically early (Archaic) forms made from what has been previously described as ‘siliceous or silicified limestone’. Seventy five finished adzes and preforms of this material were recorded in the present study. Their geographic distribution is primarily restricted to southern Hawkes Bay – Wairarapa, and they apparently originated from a single manufacturing centre at Owahanga, on the northern Wairarapa coast. Chemical and mineralogical analyses (by X-ray fluorescence, portable XRF, vacuum gasometry and X-ray diffraction) of two artefacts from Owahanga show they contain about 20–30 per cent CaCO3 (as calcite), while samples of the presumed local source rock have a slightly higher carbonate content but comparable silica (quartz) and Rb concentrations. The rock type used in the manufacture of adzes was therefore not a true limestone but calcareous mudstone, compositionally distinct from siliceous limestones in southern Wairarapa and probably derived from the Whangai Formation. Possible reasons for the use of this stone material are discussed.

text: The source, composition and typology of ‘Limestone’ Adzes from Eastern North Island, New Zealand Collections of stone adzes (toki) from the eastern North Island of New Zealand include a number of typologically early (Archaic) forms made from what has been previously described as ‘siliceous or silicified limestone’. Seventy five finished adzes and preforms of this material were recorded in the present study. Their geographic distribution is primarily restricted to southern Hawkes Bay – Wairarapa, and they apparently originated from a single manufacturing centre at Owahanga, on the northern Wairarapa coast. Chemical and mineralogical analyses (by X-ray fluorescence, portable XRF, vacuum gasometry and X-ray diffraction) of two artefacts from Owahanga show they contain about 20–30 per cent CaCO3 (as calcite), while samples of the presumed local source rock have a slightly higher carbonate content but comparable silica (quartz) and Rb concentrations. The rock type used in the manufacture of adzes was therefore not a true limestone but calcareous mudstone, compositionally distinct from siliceous limestones in southern Wairarapa and probably derived from the Whangai Formation. Possible reasons for the use of this stone material are discussed.

year: 2016