title: On the Benefits of Non-Canonical Filtering in Publish/Subscribe Systems

authors: Bittner, Sven

subjects: computer science

abstract: Current matching approaches in pub/sub systems only allow conjunctive subscriptions. Arbitrary subscriptions have to be transformed into canonical expressions, e.g., DNFs, and need to be treated as several conjunctive subscriptions. This technique is known from database systems and allows us to apply more efficient filtering algorithms. Since pub/sub systems are the contrary to traditional database systems, it is questionable if filtering several canonical subscriptions is the most efficient and scalable way of dealing with arbitrary subscriptions. In this paper we show that our filtering approach supporting arbitrary Boolean subscriptions is more scalable and efficient than current matching algorithms requiring transformations of subscriptions into DNFs.

text: On the Benefits of Non-Canonical Filtering in Publish/Subscribe Systems Current matching approaches in pub/sub systems only allow conjunctive subscriptions. Arbitrary subscriptions have to be transformed into canonical expressions, e.g., DNFs, and need to be treated as several conjunctive subscriptions. This technique is known from database systems and allows us to apply more efficient filtering algorithms. Since pub/sub systems are the contrary to traditional database systems, it is questionable if filtering several canonical subscriptions is the most efficient and scalable way of dealing with arbitrary subscriptions. In this paper we show that our filtering approach supporting arbitrary Boolean subscriptions is more scalable and efficient than current matching algorithms requiring transformations of subscriptions into DNFs.

year: 2005

title: A methodological approach to developing a measure of the psychological contract for managers

authors: Cable, Donald Alfred James

subjects: psychological contract

abstract: With a focus on a specific employment group this research attempted to add to the knowledge on the content of the psychological contract. Structured interviews with 35 managers generated 651 responses relating to the content of their psychological contracts. Analysis of those responses resulted in the development of an initial two-component measure of the contract. One component (23 items) included the managers' expectations relating to the organisation's obligations. The other component (16 items) included the managers' obligations relating to the perceived organisation's expectations. Validation of the measure was based on a questionnaire completed by 124 managers. Participants considered all items to be important aspects of the contract. Participants also rated as high the obligation of each party to meet the expectations of the other. Factor analysis of the measure revealed two factors in each component which, in line with previous research, were termed relational obligations and transactional obligations. A robust methodology is proposed for continuing research into the content of the psychological work contract.

text: A methodological approach to developing a measure of the psychological contract for managers With a focus on a specific employment group this research attempted to add to the knowledge on the content of the psychological contract. Structured interviews with 35 managers generated 651 responses relating to the content of their psychological contracts. Analysis of those responses resulted in the development of an initial two-component measure of the contract. One component (23 items) included the managers' expectations relating to the organisation's obligations. The other component (16 items) included the managers' obligations relating to the perceived organisation's expectations. Validation of the measure was based on a questionnaire completed by 124 managers. Participants considered all items to be important aspects of the contract. Participants also rated as high the obligation of each party to meet the expectations of the other. Factor analysis of the measure revealed two factors in each component which, in line with previous research, were termed relational obligations and transactional obligations. A robust methodology is proposed for continuing research into the content of the psychological work contract.

year: 2010

title: Implications and opportunities for Maori land in the Rotorua catchment

authors: Tahana, Arapeta

abstract: Arapeta is the Portfolio Manager, Waiariki Region, at Te Tumu Paeroa. He works with Maori land owners to enable them to achieve higher aspirations for their land and assets. He also collaborates with a wide range of other people and organisations, from owners in Māori land blocks, to government agencies, private sector companies and experts in many fields to find innovative and pragmatic solutions to the challenges of growing Māori. He is an elected member on the Māori Advisory Committee to RDC working to develop a meaningful partnership between Te Arawa and the Council.

text: Implications and opportunities for Maori land in the Rotorua catchment Arapeta is the Portfolio Manager, Waiariki Region, at Te Tumu Paeroa. He works with Maori land owners to enable them to achieve higher aspirations for their land and assets. He also collaborates with a wide range of other people and organisations, from owners in Māori land blocks, to government agencies, private sector companies and experts in many fields to find innovative and pragmatic solutions to the challenges of growing Māori. He is an elected member on the Māori Advisory Committee to RDC working to develop a meaningful partnership between Te Arawa and the Council.

year: 2013