title: Optimizing Pub/Sub Systems by Advertisement Pruning

authors: Bittner, Sven

subjects: computer science

abstract: Supporting advertisements in large publish/subscribe services has an improving influence on the system scalability. The additional application of event routing optimizations based on subscriptions further increases the event throughput and decreases the memory usage of publish/subscribe systems. However, also advertisement-based optimizations can improve these system properties but have been widely neglected so far. In particular, no current optimizations are applicable to advertisements defined as arbitrary Boolean filter expressions. 
In this paper, we outline the final milestone on the way to practically support the arbitrary Boolean publish/subscribe model: We firstly develop a novel optimization approach, advertisement pruning, that is tailored to arbitrary Boolean advertisements. Secondly, we present a detailed evaluation of the optimization potential of this advertisement-based solution. We finally analyze the effects of additionally optimizing subscriptions on the advertisement pruning optimization.

text: Optimizing Pub/Sub Systems by Advertisement Pruning Supporting advertisements in large publish/subscribe services has an improving influence on the system scalability. The additional application of event routing optimizations based on subscriptions further increases the event throughput and decreases the memory usage of publish/subscribe systems. However, also advertisement-based optimizations can improve these system properties but have been widely neglected so far. In particular, no current optimizations are applicable to advertisements defined as arbitrary Boolean filter expressions. 
In this paper, we outline the final milestone on the way to practically support the arbitrary Boolean publish/subscribe model: We firstly develop a novel optimization approach, advertisement pruning, that is tailored to arbitrary Boolean advertisements. Secondly, we present a detailed evaluation of the optimization potential of this advertisement-based solution. We finally analyze the effects of additionally optimizing subscriptions on the advertisement pruning optimization.

year: 2006

title: Investigating the feasibility of using digital representations of work for performance assessment in engineering

authors: Williams, P. John

subjects: digital assessment

abstract: This paper reports on the results of a 3-year study conducted at the Centre for Schooling and Learning Technologies (CSaLT) at Edith Cowan University in collaboration with the Curriculum Council of Western Australia which concerns the potential to use digital technologies to represent the output from assessment tasks in the senior secondary course, Engineering Studies. The general aim of this study is to explore the potential of various digitally-based forms for external assessment for senior secondary courses in terms of manageability, cost, validity and reliability. The problem being addressed was the need to provide students with assessment opportunities in new courses, that are on one hand authentic, where many outcomes do not lend themselves to being assessed using pen and paper over a three hour period, while on the other hand being able to be reliably and manageably assessed by external examiners. That is, the external assessment for a course needs to accurately and reliably assess the outcomes without a huge increase in the cost of assessment. A computer managed examination was designed that consisted of a design task that was broken down into a number of timed activities. Students were paced through each activity, recording their input in the form of a portfolio. Input consisted of text, graphics through a camera, video and voice. The exam outputs were uploaded to a online repository. The students’ work was marked by external assessors using a standards based rubric that allowed the students work to be ranked though Rasch Modelling.

text: Investigating the feasibility of using digital representations of work for performance assessment in engineering This paper reports on the results of a 3-year study conducted at the Centre for Schooling and Learning Technologies (CSaLT) at Edith Cowan University in collaboration with the Curriculum Council of Western Australia which concerns the potential to use digital technologies to represent the output from assessment tasks in the senior secondary course, Engineering Studies. The general aim of this study is to explore the potential of various digitally-based forms for external assessment for senior secondary courses in terms of manageability, cost, validity and reliability. The problem being addressed was the need to provide students with assessment opportunities in new courses, that are on one hand authentic, where many outcomes do not lend themselves to being assessed using pen and paper over a three hour period, while on the other hand being able to be reliably and manageably assessed by external examiners. That is, the external assessment for a course needs to accurately and reliably assess the outcomes without a huge increase in the cost of assessment. A computer managed examination was designed that consisted of a design task that was broken down into a number of timed activities. Students were paced through each activity, recording their input in the form of a portfolio. Input consisted of text, graphics through a camera, video and voice. The exam outputs were uploaded to a online repository. The students’ work was marked by external assessors using a standards based rubric that allowed the students work to be ranked though Rasch Modelling.

year: 2012

title: Ma hea – which way? Mo te aha – what for?

authors: Te Awekotuku, Ngahuia

subjects: prejudice

abstract: Keynote address to the annual conference of the
NZ Psychological Society, 28 August 2004
E rau rangatira ma, tena ra koutou….
This presentation will be in four sections.
The first section will introduce two major issues, mana motuhake, and
manatangata, then we will consider some proposed legislation, the Seabed
& Foreshore Bill and the Civil Union Bill.
We will then consider strategic Maori response to political pressure over the
last three decades, and then note two recent and dramatic examples. They
are the Hikoi Takutai Moana, April 2004, and the Enough is Enough Rally,
August 2004
In the final section, we will consider the implications for psychologies and
psychologists working today in Aotearoa.

text: Ma hea – which way? Mo te aha – what for? Keynote address to the annual conference of the
NZ Psychological Society, 28 August 2004
E rau rangatira ma, tena ra koutou….
This presentation will be in four sections.
The first section will introduce two major issues, mana motuhake, and
manatangata, then we will consider some proposed legislation, the Seabed
& Foreshore Bill and the Civil Union Bill.
We will then consider strategic Maori response to political pressure over the
last three decades, and then note two recent and dramatic examples. They
are the Hikoi Takutai Moana, April 2004, and the Enough is Enough Rally,
August 2004
In the final section, we will consider the implications for psychologies and
psychologists working today in Aotearoa.

year: 2003-08