title: Evaluating the replicability of significance tests for comparing learning algorithms

authors: Bouckaert, Remco R.

subjects: computer science

abstract: Empirical research in learning algorithms for classification tasks generally requires the use of significance tests. The quality of a test is typically judged on Type I error (how often the test indicates a difference when it should not) and Type II error (how often it indicates no difference when it should). In this paper we argue that the replicability of a test is also of importance. We say that a test has low replicability if its outcome strongly depends on the particular random partitioning of the data that is used to perform it. We present empirical measures of replicability and use them to compare the performance of several popular tests in a realistic setting involving standard learning algorithms and benchmark datasets. Based on our results we give recommendations on which test to use.

text: Evaluating the replicability of significance tests for comparing learning algorithms Empirical research in learning algorithms for classification tasks generally requires the use of significance tests. The quality of a test is typically judged on Type I error (how often the test indicates a difference when it should not) and Type II error (how often it indicates no difference when it should). In this paper we argue that the replicability of a test is also of importance. We say that a test has low replicability if its outcome strongly depends on the particular random partitioning of the data that is used to perform it. We present empirical measures of replicability and use them to compare the performance of several popular tests in a realistic setting involving standard learning algorithms and benchmark datasets. Based on our results we give recommendations on which test to use.

year: 2004

title: Knowledge management strategy employed in a SME: The case of a building materials supplier

authors: Shackelford, Adam

subjects: knowledge management

abstract: The purpose of this paper is to investigate the knowledge management strategy of a small to medium enterprise (SME), and the consequences of a misplaced strategy. The methodology employed for this study applied three triangulated techniques for data collection in the field. The findings showed that management level and staff level employed different strategies to manage knowledge. Management focused on more formal IT systems and tools to manage knowledge, with a focus on explicit knowledge management. Frontline staff depended more heavily on communities of practice and learning-by-doing and to manage their knowledge. This resulted in many frontline staff finding little value for the standard technological tool and systems implemented. There are few empirical studies that look at knowledge management strategies within SMEs. This article, to some degree, fills this knowledge gap.

text: Knowledge management strategy employed in a SME: The case of a building materials supplier The purpose of this paper is to investigate the knowledge management strategy of a small to medium enterprise (SME), and the consequences of a misplaced strategy. The methodology employed for this study applied three triangulated techniques for data collection in the field. The findings showed that management level and staff level employed different strategies to manage knowledge. Management focused on more formal IT systems and tools to manage knowledge, with a focus on explicit knowledge management. Frontline staff depended more heavily on communities of practice and learning-by-doing and to manage their knowledge. This resulted in many frontline staff finding little value for the standard technological tool and systems implemented. There are few empirical studies that look at knowledge management strategies within SMEs. This article, to some degree, fills this knowledge gap.

year: 2009-12

title: Community engagement: managers’ viewpoints

authors: Hanlen, Patricia

subjects: New Zealand

abstract: Managers are invaluable for their support of fieldwork placement for social work students. This chapter examines factors that influence managers’ decision-making towards student placement provision, a role which has traditionally been overlooked in the literature. Understandings were gained from fifteen non-statutory managers gathered in a qualitative study in New Zealand. Māori and non-Māori managers were interviewed twice, with a three month interval between data gathering. Four themes of organisational, cultural, student and relational factors are considered for their influence on provision. Findings suggest the importance of student quality and their ability to make connections with local indigenous communities and reciprocity in relationships between educational institutions and social service agencies.

text: Community engagement: managers’ viewpoints Managers are invaluable for their support of fieldwork placement for social work students. This chapter examines factors that influence managers’ decision-making towards student placement provision, a role which has traditionally been overlooked in the literature. Understandings were gained from fifteen non-statutory managers gathered in a qualitative study in New Zealand. Māori and non-Māori managers were interviewed twice, with a three month interval between data gathering. Four themes of organisational, cultural, student and relational factors are considered for their influence on provision. Findings suggest the importance of student quality and their ability to make connections with local indigenous communities and reciprocity in relationships between educational institutions and social service agencies.

year: 2011