Honoring ceremony for the Head of the Department
IDA's departing head of the department, Professor Mariam Kamkar, was honored at
a ceremony held during the institution's Christmas dinner. Mariam took office
in 2000, and by the end of 2017/2018 she will have been prefect for 18 years,
more than half the time that IDA has existed. In 2008, she was the inaugural
recipient of the University Leadership Prize.
The farewell ceremony included speeches by Sweden’s first computer science professor, Erik Sandewall, LiTH's Dean, Ulf Nilsson, and incoming prefect, Henrik Eriksson. The speakers highlighted Mariam's wise leadership, her commitment to gender equality, and the enthusiasm she brought to the role of department head. They spoke warmly of her forthright interpersonal style, her conflict resolution skills, and her emphasis on the importance of all new international employees learning Swedish. Gifts from IDA staff were presented during the ceremony, along with thanks for Mariam’s many years of work developing the department and university.
Efficient streaming and enabling tomorrow's streaming services
Online video streaming has gained tremendous popularity over recent years and
currently constitutes the majority of Internet traffic. As large-scale
on-demand streaming continues to gain popularity, several important questions
and challenges remain unanswered. In his thesis, Dr. Vengatanathan
Krishnamoorthi and colleagues address open questions in the areas of efficient
content delivery for regular/linear HTTP-based Adaptive Streaming (HAS) videos
and efficient content delivery for interactive HAS videos.
In the context of regular/linear videos, Vengatanathan first investigates how HAS clients and proxy-caches can cooperate so as to improve viewers' Quality of Experience (QoE). Second, he investigates client-based prefetching techniques that download beginnings of recommended/alternative videos so as to enable instantaneous playback of these videos. Finally, the thesis presents a novel machine learning framework, called BUFFEST, which can be used by network operators to estimate clients' buffer conditions even when the transfer is encrypted and clients are streaming over HTTPS. These contributions all help improve users' everyday video streaming experiences.
In the context of interactive streaming services, Vengatanathan's thesis presents optimized solutions for two new applications: interactive branched videos and multi-video stream bundles. These solutions leverage properties of HAS to provide users with the best possible interactive user experience, allowing the viewers to influence and select the content that is being shown during playback.
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