title: The arbitrary Boolean publish/subscribe model: making the case

authors: Bittner, Sven

subjects: computer science

abstract: In this paper, we present BoP, a content-based publish/subscribe system for arbitrary Boolean subscriptions and advertisements. BoP targets at the time and space-efficient matching of event messages using the wide-spread attribute-value pair event model.
In contrast to other content-based publish/subscribe systems focussing on an efficient matching process, BoP internally supports subscriptions and advertisements as arbitrary Boolean expressions. As we will show in this paper, directly handling these representations leads to efficiency benefits for applications using this class of expressions.
The support of arbitrary Boolean subscriptions and advertisements requires the introduction of efficient matching and overlapping calculation algorithms, as well as applicable routing optimizations. In this paper, we will outline these solutions that have been integrated into BoP. The evaluation part of this work presents the results of a comparative study of our approaches and recent conjunctive solutions.

text: The arbitrary Boolean publish/subscribe model: making the case In this paper, we present BoP, a content-based publish/subscribe system for arbitrary Boolean subscriptions and advertisements. BoP targets at the time and space-efficient matching of event messages using the wide-spread attribute-value pair event model.
In contrast to other content-based publish/subscribe systems focussing on an efficient matching process, BoP internally supports subscriptions and advertisements as arbitrary Boolean expressions. As we will show in this paper, directly handling these representations leads to efficiency benefits for applications using this class of expressions.
The support of arbitrary Boolean subscriptions and advertisements requires the introduction of efficient matching and overlapping calculation algorithms, as well as applicable routing optimizations. In this paper, we will outline these solutions that have been integrated into BoP. The evaluation part of this work presents the results of a comparative study of our approaches and recent conjunctive solutions.

year: 2007

title: Challenges for e-learning for university instructors in Taiwan

authors: Wang, Su-Chen

subjects: e-learning

abstract: Blended courses that include both face-to-face and e-learning have been offered  in many universities in Taiwan but very little research has been undertaken on instructor  perspectives of the challenges they faced in their e-learning teaching. This paper explores the challenges faced by university instructors in a national research-based university in Taiwan. An interpretive paradigm utilizing qualitative and quantitative methods was adopted. The paper outlines the findings from 27 e-learning instructors in in-depth interviews and 55 of 69 e-learning instructors who responded to this open-ended question in the questionnaire. Instructors noted they faced pedagogical, personal, and technological challenges. The findings suggested instructors needed to adopt different pedagogical approaches to work with new media in developing their e-learning courses so new curriculum design, new teaching methods, new ways of assessment, and new interaction approaches were needed. The instructors faced personal challenges in time management and role change if they needed to provide course materials online and respond in time. Instructors noted they also encountered four categories of technological challenges: easy access to necessary computer equipment, technical skills to access computer technology and the e-learning system, technical skills for communication, and the quality of e-learning computer facilities and technology. University administrators interested in solving the issue of the under-use of e-learning would be wise to recognize the challenges instructors face and to provide the necessary policy and practical support to help overcome these challenges if they wish to promote the use of e-learning as a part of the blended delivery of courses.

text: Challenges for e-learning for university instructors in Taiwan Blended courses that include both face-to-face and e-learning have been offered  in many universities in Taiwan but very little research has been undertaken on instructor  perspectives of the challenges they faced in their e-learning teaching. This paper explores the challenges faced by university instructors in a national research-based university in Taiwan. An interpretive paradigm utilizing qualitative and quantitative methods was adopted. The paper outlines the findings from 27 e-learning instructors in in-depth interviews and 55 of 69 e-learning instructors who responded to this open-ended question in the questionnaire. Instructors noted they faced pedagogical, personal, and technological challenges. The findings suggested instructors needed to adopt different pedagogical approaches to work with new media in developing their e-learning courses so new curriculum design, new teaching methods, new ways of assessment, and new interaction approaches were needed. The instructors faced personal challenges in time management and role change if they needed to provide course materials online and respond in time. Instructors noted they also encountered four categories of technological challenges: easy access to necessary computer equipment, technical skills to access computer technology and the e-learning system, technical skills for communication, and the quality of e-learning computer facilities and technology. University administrators interested in solving the issue of the under-use of e-learning would be wise to recognize the challenges instructors face and to provide the necessary policy and practical support to help overcome these challenges if they wish to promote the use of e-learning as a part of the blended delivery of courses.

year: 2008

title: “Landlords wouldn’t give my application a second look.” Discrimination exacerbates inequalities in access to private rental housing

authors: Terruhn, Jessica

abstract: This report and the key insights are based on findings from a housing survey that was conducted with 800 residents in neighbourhoods in Auckland, Hamilton and Christchurch. 
• Perceptions of unfairness in Aotearoa’s housing sector are widespread. Renters, Māori, younger people and low-income groups as well as residents in neighbourhoods with high levels of housing deprivation are most likely to think that people are treated unfairly when trying to rent or buy a home in Aotearoa. 
• Nearly one in three respondents reported having experienced discrimination when trying to rent or buy a home in Aotearoa. Renters, Māori, younger people and low-income groups as well as residents in neighbourhoods with high levels of housing deprivation are most likely to report experiences of discrimination. 
• Advantage and disadvantage in securing a home are determined by a combination of interlocking factors, including income and employment status, age, family status, and race/ethnicity or skin colour. These patterns suggest widespread experiences of potentially unlawful housing discrimination. 
• People strategically try to avoid and mitigate discrimination. Expectations of being discriminated against and of being advantaged influence where and how home seekers search for housing. This finding signals that experiences of rejection play a role in constraining people’s housing choices. 
• The survey findings suggest that discrimination, as part of tenant selection, contributes to housing precarity and inequalities in access to rental housing. Therefore, this research points to an urgent need to address housing discrimination, especially in the context of high levels of residential mobility among renters and intense competition for rental properties.

text: “Landlords wouldn’t give my application a second look.” Discrimination exacerbates inequalities in access to private rental housing This report and the key insights are based on findings from a housing survey that was conducted with 800 residents in neighbourhoods in Auckland, Hamilton and Christchurch. 
• Perceptions of unfairness in Aotearoa’s housing sector are widespread. Renters, Māori, younger people and low-income groups as well as residents in neighbourhoods with high levels of housing deprivation are most likely to think that people are treated unfairly when trying to rent or buy a home in Aotearoa. 
• Nearly one in three respondents reported having experienced discrimination when trying to rent or buy a home in Aotearoa. Renters, Māori, younger people and low-income groups as well as residents in neighbourhoods with high levels of housing deprivation are most likely to report experiences of discrimination. 
• Advantage and disadvantage in securing a home are determined by a combination of interlocking factors, including income and employment status, age, family status, and race/ethnicity or skin colour. These patterns suggest widespread experiences of potentially unlawful housing discrimination. 
• People strategically try to avoid and mitigate discrimination. Expectations of being discriminated against and of being advantaged influence where and how home seekers search for housing. This finding signals that experiences of rejection play a role in constraining people’s housing choices. 
• The survey findings suggest that discrimination, as part of tenant selection, contributes to housing precarity and inequalities in access to rental housing. Therefore, this research points to an urgent need to address housing discrimination, especially in the context of high levels of residential mobility among renters and intense competition for rental properties.

year: 2024-08