- 09-02-2017: Technical Seminar "Data-Driven Computing for Smart Vehicles", by Dr Yajun Ha, ShanghaiTech University, China.
- 30-03-2017: Technical Seminar "Open 5G Platform", by Dr Yang Yang, Chinese Academy of Sciences & ShanghaiTech University, China.
- 07-04-2017: Technical Seminar "Medical Informatics: Data Analytics in Healthcare", by Dr Liu Nan, Singapore General Hospital & Duke-NUS Medical School, Singapore.
- 16-05-2017: Technical Seminar "Chanllenges and Solutions for Automotive Security & Privacy", by Dr H. Gregor Molter, Head of Security & Privacy Research Embedded Systems, Security & Privacy Competence Center, SCC, Cross Divisional Systems & Technology - Corporate S&T, Continental Teves AG & Co. oHG, Germany.
- 23-05-2017: Distinguished Lecture "An Anatomy of Social Media Popularity", by Dr Lexing Xie, Austrialian National University, Australia.
- 27-06-2017: Technical Talk "Circuit Level Optimization of Fixed-coefficient Digital FIR Filters", by Dr Yajun Yu, South University of Science and Technology, China.
- 27-06-2017: Technical Talk "New Developments: Promoting the IEEE Circuits and Systems Society Activities", by Prof Yong Lian (IEEE CASS President-Elect).
- 25-07-2017: Technical Talk "Graph Signal Processing: Techniques for Processing of Numerical Data Defined over Irregular Domain", by Dr David Tay, La Trobe University, Australia.
- 10-08-2017: Technical Talk "Rate-Distortion Optimization for Sparse Coding in Image Compression", by Prof Nam Ling, Santa Clara University, U.S.A.
- 18-08-2017: Distinguished Lecture "Chanllenges and Opportunities of Circuits and Systems on Internet of Things", by Dr. Yen-Kuang Chen, Intel Corporation, U.S.A.
- 26-10-2017: Technical Talk "Design Automation of Cyberphysical Systems: System-Level Approaches for Energy-Aware Electric Vehicle Design and Management", by Prof Naehyuck Chang, Korea Advanced Institute of Science and Technology, Korea.
An Anatomy of Social Media PopularityDr. Lexing Xie, Associate Professor, Australian National University, AustraliaOrganized by IEEE Circuits and Systems Singapore Chapter & Centre for Infocomm Technology (INFINITUS), School of EEE, NTU "Sponsored by the IEEE Circuits and Systems Society under its Distinguished Lecturer Program" |
| Date : 23 May 2017 (Tuesday) Time : 2.30 PM - 3.30 PM Venue : Executive Seminar Room S2.2-B2-53 |
Abstract
Speaker BiographyLexing Xie is Associate Professor in the Research School of Computer Science at the Australian National University, she leads the ANU Computational Media lab (https://cm.cecs.anu.edu.au), and is also affiliated with the machine learning research group at NICTA. She was research staff member at IBM T.J. Watson Research Center in New York from 2005 to 2010, and adjunct assistant professor at Columbia University 2007-2009. She received B.S. from Tsinghua University, Beijing, China, and M.S. and Ph.D. degrees from Columbia University, all in Electrical Engineering. Her research interests are in machine learning, multimedia, social media. Of particular recent interest are stochastic time series models, neural network for sequences, and active learning, applied to diverse problems such as multimedia knowledge graphs, modeling popularity in social media, social recommendation. Lexing's research has received six best student paper and best paper awards between 2002 and 2015, and a Grand Challenge Multimodal Prize at ACM Multimedia 2012. She currently serves an associate editor of ACM Trans. MM, ACM TiiS and PeerJ Computer Science. Her service roles include the program and organizing committees of major multimedia, machine learning, web and social media conferences. |

Facebook has recently announced its OpenCellular platform for promoting open-source wireless access technology developments and broader applications. In this talk, we will give an introduction of an open 5G platform, which applies SDN and NFV techniques to realize the key functions of a telecom operator according to the 3GPP standard on general CPU/GPU computing platform. It is very adaptive and flexible for supporting a variety of internet of things (IoT) applications in vertical industries. New technical challenges and potential applications of this open platform in delay-sensitive control areas will be fully discussed.
In this talk, a general introduction including current challenges for automotive security and privacy is given. It is highlighted how Continental is introducing a security life cycle in terms of a secure system engineering process and incident response management process to facilitate secure products. Our methodology for threat analysis, risk assessment, and risk treatment is detailed and discussed in relation of past research project like EVITA.On overview of our ongoing standardization efforts in ISO AWI 21434 "Road Vehicles - Cybersecurity Engineering" concludes the talk.
How did a video go viral? Or will it go viral, and when? These are some of the most intriguing yet difficult questions in social media analysis. This talk will first provide a broad overview of recent research in understanding the predicting popularity, driven by larger amounts of online data and more understanding of human perception and psychology. I will then cover a few recent results from my group on understanding and predicting popularity, especially for YouTube videos. I will start by describing a unique longitudinal measurement study on video popularity history, and introduce popularity phases, a novel way to describe the evolution of popularity over time. I will then discuss a physics-inspired stochastic model that connects exogenous stimuli and endogenous responses to explain and forecast popularity. With such novel representation and new models, we can correlate video content type to popularity patterns, make better predictions, describe the endo-exo factors driving popularity, and forecast the effects of promotion campaigns.
Traditional video and image compression in main stream standards such as H.264/AVC and H.265/HEVC adopt a hybrid coding method incorporating orthogonal transforms, motion estimation, intra prediction, and entropy coding. Such methods seem to have approached saturation on coding efficiency, and major breakthrough is hard to achieve by traditional signal processing techniques. Recently, much research has been focusing on applying machine learning approaches aiming to improve coding efficiency to another level. In this talk, we will give an overview of image/video coding and its recent progress; we will then focus on one of our group’s research using sparse coding with over-complete representation to reduce the number of coefficients representing image information, as opposed to those by a traditional discrete cosine transform (DCT) method. Dictionary with over-complete representation can be learned from data and trained by a K-SVD (singular value decomposition) algorithm. Orthogonal matching pursuit (OMP) algorithm is then applied to select dictionary elements and their coefficients to represent the image. We propose a rate-distortion optimization (RDO) approach to select the number of non-zero coefficients given a sparsity constraint. Experimental results demonstrated a very good improvement of coding efficiency by our approach over the conventional DCT-based scheme. Finally, we will highlight some of our current research.
This seminar aims to discuss the technical trends and challenges of circuits and systems on Internet of Things. Rapid advancement of networking technologies together with extreme miniaturization of computing and communication devices enable a host of new and exciting applications and services that connect the physical and the computational worlds. In the future, digital sensing, communication, and processing capabilities will be ubiquitously embedded into everyday objects, turning them into the Internet of Things (IoT). In this new paradigm, smart devices will collect data, relay the information or context to each another, and process the information collaboratively using cloud computing and similar technologies. This paradigm shift creates numerous challenges and opportunities for engineering. For example, in the future, enormous numbers of sensors will be deployed. The costs of servicing such sensors will be a major concern. It is often almost impossible to replace sensor batteries once they are in the field. Therefore, one major challenge is low power sensor design, or designs which do not require a battery change over the lifetime of the sensor. For example, if a sensor is deployed on an animal for tracking purposes, the battery of the sensor should outlive the animal. This creates a demand for energy-efficient designs. This seminar will discuss the challenges and opportunities of circuits and systems on Internet of Things.