The 5th Workshop ISE (WISE) 2011

Topic: A Brief Overview of Recommender Systems
Abstract: The information on the Web presents great challenges to both customers and online businesses in the e-commerce environment. Customers frequently experience difficulty in searching for products on the Web, while online businesses often face difficulties to promote products appropriate to specific customers. In the industry and academia, there has been much work done on developing new approaches to recommender systems. This talk presents an overview of the field of recommender systems and describes current recommendation methods that are classified into content-based, collaborative, and hybrid recommendation approaches. This talk also discusses various limitations of those current recommendation methods and possible extensions that can improve recommendation capabilities and make recommender systems applicable to an even broader range of applications.
Presenter: Dat Huynh, PhD Candidate
Date: Friday 23 September 2011
Time: 12:45 PM – 1:45 PM
Location: 11B24

The 4th Workshop ISE (WISE) 2011

Topic: Comparison of Time to Stabilization measurements calculated through the data obtained from force plate and accelerometers
Abstract: The time needed for a person to reach a postural stable position, called time to stabilization (TTS), in a single leg stance test is used to measure the postural stability of the person. This measurement has wide applications in clinic practices and also athlete training. The calculation of TTS so far is through the data of the recorded reaction forces, in 3 dimensions, on a force plate. This practice is very expensive and restrictive, as a force plate is very expensive and has to be set up in a very well designed in-house location. Thus, the tests can only be carried out in this environment. Given the ever increasing use of cheap, yet accurate, accelerometers, which are commonly built in smart phones and other handheld devices, it is logic to ask if the data collected from an accelerometer can be used to calculate TTS. The comparison of the TTS measurements calculated through the data collected from a force plate and accelerometers will be presented.
Presenter: Dr Wanli Ma
Date: Friday 16 September 2011
Time: 12:45 PM – 1:45 PM
Location: 11B24

The 3rd Workshop ISE (WISE) 2011

Topic: Multi-Sphere Support Vector Clustering
Abstract: Current support vector clustering method determines the smallest sphere that encloses the image of a dataset in feature space. This sphere when mapped back to data space will form a set of contours that can be interpreted as cluster boundaries for the dataset. However this method does not guarantee that the single sphere and the resulting cluster boundaries can best describe the dataset if there are some distinctive data distributions in this dataset. We propose multi-sphere support vector clustering to address this issue. Data points in data space are mapped to a high dimensional feature space and a set of smallest spheres that encloses the image of the dataset is determined. This set of spheres when mapped back to data space will form a set of contours that can be interpreted as cluster boundaries. Experiments on different datasets are performed to demonstrate that the proposed approach provides a better cluster analysis than the current support vector clustering method.
Presenter: Trung Le, PhD student
Date: Friday 9 September 2011
Time: 12:45 PM – 1:45 PM
Location: 11B24

The 2nd Workshop ISE (WISE) 2011

Topic: Knowledge Discovery from Constraints for Evolutionary Solutions
Abstract: Many science and engineering applications require finding solutions to satisfy a set of constraints. Many problems ranging from resource allocation and scheduling to fault diagnosis and design involve constraint satisfaction as an essential component. The constraint satisfaction problems (CSPs) are a well-known satisfiability problem that is NP-complete because of their complexity to solve the problem. Evolutionary algorithms (EAs) are acknowledged as good solvers for complex problems (NP hard, NP complete etc) of various problem domains. EAs have been used to solve CSPs however, traditional EAs are ‘blind’ to constraint as they do not extract knowledge from the constraints to guide its heuristic search mechanism. The EAs also do not learn from past experience in the context of constraint handling. In case of change in constraint(s), the solution has to be regenerated and previous solution is discarded. I have proposed the solutions for these inherent problems of EA to make it robust and efficient to solve CSPs.
Presenter: Anurag Sharma, PhD student
Date: Friday 2 September 2011
Time: 12:45 PM – 1:45 PM
Location: 11B24

The 1st Workshop ISE (WISE) 2011

Topic: About Setting Up NIRS-Based Experiments
Abstract: Near-infrared spectroscopy (NIRS) has been widely used to measure tissue oxygen status non-invasively during activation of brain function in human adults. I was working with a research group at International University in Viet Nam during semester break to conduct NIRS-based experiments. Experiences gained from setting up those experiments including data collection protocols and challenges as well as preliminary results on person and action classification will be presented in this seminar.
Presenter: Tuan Hoang, PhD student
Date: Friday 26 August 2011
Time: 12:45 PM – 1:45 PM
Location: 11B24

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