AWS July Webinar Series: Amazon Redshift Optimizing PerformanceAmazon Web Services
Amazon Redshift is a fast, petabyte-scale data warehouse that makes it easy to analyze your data for a fraction of the cost of traditional data warehouses.
By following a few best practices for schema design and cluster design, you can unleash the high performance capabilties of Amazon Redshift. This webinar is a deep dive into performance tuning techniques based on real-world use cases.
Learning Objectives:
Learn how to get the best performance from your Redshift cluster
Design Amazon Redshift clusters based on real world use cases
See sample tuning scripts to diagnose and maximize cluster performance
Learn about increasing query performance using interleaved sorting
AWS July Webinar Series: Amazon Redshift Optimizing PerformanceAmazon Web Services
Amazon Redshift is a fast, petabyte-scale data warehouse that makes it easy to analyze your data for a fraction of the cost of traditional data warehouses.
By following a few best practices for schema design and cluster design, you can unleash the high performance capabilties of Amazon Redshift. This webinar is a deep dive into performance tuning techniques based on real-world use cases.
Learning Objectives:
Learn how to get the best performance from your Redshift cluster
Design Amazon Redshift clusters based on real world use cases
See sample tuning scripts to diagnose and maximize cluster performance
Learn about increasing query performance using interleaved sorting
Ekaw2014 - Inferring Semantic Relations by User FeedbackFrancesco Osborne
Inferring Semantic Relations by User Feedback
by F. Osborne, E. Motta
URL: http://oro.open.ac.uk/41162/
In the last ten years, ontology-based recommender systems have been shown to be effective tools for predicting user preferences and suggesting items. There are however some issues associated with the ontologies adopted by these approaches, such as: 1) their crafting is not a cheap process, being time consuming and calling for specialist expertise; 2) they may not represent accurately the viewpoint of the targeted user community; 3) they tend to provide rather static models, which fail to keep track of evolving user perspectives. To address these issues, we propose Klink UM, an approach for extracting emergent semantics from user feedbacks, with the aim of tailoring the ontology to the users and improving the recommendations accuracy. Klink UM uses statistical and machine learning techniques for finding hierarchical and similarity relationships between keywords associated with rated items and can be used for: 1) building a conceptual taxonomy from scratch, 2) enriching and correcting an existing ontology, 3) providing a numerical estimate of the intensity of semantic relationships according to the users. The evaluation shows that Klink UM performs well with respect to handcrafted ontologies and can significantly increase the accuracy of suggestions in content-based recommender systems.
An Exploratory Study on the Links between Individual Upcycling, Product Attac...Kyungeun Sung
These slides were used for the presentation in the Product Lifetimes And The Environment Conference (Nottingham) in June, 2015. The presentation summarises the paper, "An exploratory study on the links between individual upcycling, product attachment and product longevity".
Ekaw2014 - Inferring Semantic Relations by User FeedbackFrancesco Osborne
Inferring Semantic Relations by User Feedback
by F. Osborne, E. Motta
URL: http://oro.open.ac.uk/41162/
In the last ten years, ontology-based recommender systems have been shown to be effective tools for predicting user preferences and suggesting items. There are however some issues associated with the ontologies adopted by these approaches, such as: 1) their crafting is not a cheap process, being time consuming and calling for specialist expertise; 2) they may not represent accurately the viewpoint of the targeted user community; 3) they tend to provide rather static models, which fail to keep track of evolving user perspectives. To address these issues, we propose Klink UM, an approach for extracting emergent semantics from user feedbacks, with the aim of tailoring the ontology to the users and improving the recommendations accuracy. Klink UM uses statistical and machine learning techniques for finding hierarchical and similarity relationships between keywords associated with rated items and can be used for: 1) building a conceptual taxonomy from scratch, 2) enriching and correcting an existing ontology, 3) providing a numerical estimate of the intensity of semantic relationships according to the users. The evaluation shows that Klink UM performs well with respect to handcrafted ontologies and can significantly increase the accuracy of suggestions in content-based recommender systems.
An Exploratory Study on the Links between Individual Upcycling, Product Attac...Kyungeun Sung
These slides were used for the presentation in the Product Lifetimes And The Environment Conference (Nottingham) in June, 2015. The presentation summarises the paper, "An exploratory study on the links between individual upcycling, product attachment and product longevity".