“A Decentralised Multimodal Integration of Social Signals: A Bio-Inspired Approach” by Esma Benssassi and “Plug and Play Bench: Simplifying Big Data Benchmarking Using Containers” by Sheriffo Ceesay

Esma’s abstract

The ability to integrate information from different sensory modalities in a social context is crucial for achieving an understanding of social cues and gaining useful social interaction and experience. Recent research has focused on multi-modal integration of social signals from visual, auditory, haptic or physiological data. Different data fusion techniques have been designed and developed; however, the majority have not achieved significant accuracy improvement in recognising social cues compared to uni-modal social signal recognition. One of the possible limitations is that these existing approaches have no sufficient capacity to model various types of interactions between different modalities and have not been able to leverage the advantages of multi-modal signals by considering each of them as complementary to the others. We introduce ideas for creating a decentralised model for social signals integration inspired by computational models of multi-sensory integration in neuroscience and the perception of social signals in the human brain.

Sheriffo’s abstract

The recent boom of big data, coupled with the challenges of its processing and storage gave rise to the development of distributed data processing and storage paradigms like MapReduce, Spark, and NoSQL databases. With the advent of cloud computing, processing and storing such massive datasets on clusters of machines is now feasible with ease. However, there are limited tools and approaches, which users can rely on to gauge and comprehend the performance of their big data applications deployed locally on clusters, or in the cloud. Researchers have started exploring this area by providing benchmarking suites suitable for big data applications. However, many of these tools are fragmented, complex to deploy and manage, and do not provide transparency with respect to the monetary cost of benchmarking an application.

In this talk, I will present Plug And Play Bench PAPB (https://github.com/sneceesay77/papb): an infrastructure aware abstraction built to integrate and simplify the process of big data benchmarking. PAPB automates the tedious process of installing, configuring and executing common big data benchmark workloads by containerising the tools and settings based on the underlying cluster deployment framework. Our proof of concept implementation utilises HiBench as the benchmark suite, HDP as the cluster deployment framework and Azure as the cloud platform. The talk will further illustrate the inclusion of cost metrics based on the underlying Microsoft Azure cloud platform.

Event details

  • When: 26th October 2017 13:00 - 14:00
  • Where: Cole 1.33a
  • Series: Systems Seminars Series
  • Format: Seminar

SRG Seminar: “Adaptive Multisite Computation Offloading in Mobile Clouds” by Dawand Sulaiman and “Topological Ranking-Based Resource Scheduling for Multi-Accelerator Systems” by Teng Yu

Dawand’s abstract

The concept of using cloud hosted infrastructure as a means to overcome the resource-constraints of mobile devices is known as Mobile Cloud Computing (MCC), and allows applications to run partially on the device, and partially on a remote cloud instance, thereby overcoming any device-specific resource constraints. However, as smart phones and tablets gain more CPU power and longer battery life, the meaning of MCC gradually changes. Instead of being fully dependent on the cloud, a number of nearby devices can be used to coordinate and distribute content and resources in a decentralised manner; this is known as Mobile Ad hoc Cloud Computing. Mobile devices with less computational power and lower battery life can be leveraged by the nearby mobile devices to run resource-intensive applications. Therefore, more efficient and reliable methodologies need to be explored for resource hungry and real time applications such as face recognition, data-intensive, and augmented reality mobile applications.
We present a unified framework which allows each mobile device within the shared environment to intelligently offload its computation to other external platforms. For the individual mobile devices, it is important to make the offloading decision based on network conditions, load of other machines, and mobile device’s own constraints (e.g., mobility and battery). Moreover, to achieve a global optimal task completion time for tasks from all the mobile devices, it is necessary to devise a task scheduling solution that schedules offloaded tasks in real time. The offloading decision engine needs to adapt to the dynamic changes in both the host device and connected nearby and remote devices.

Teng’s abstract

Accelerators are becoming increasingly prevalent in distributed computation. FPGAs have been shown to be fast and power efficient for particular tasks, yet scheduling on multi-accelerator systems is challenging when workloads vary significantly in granularity in terms of task size and/or number of computational unit required.
We present a novel approach for dynamically scheduling tasks on networked multi-accelerator systems which maintains high performance, even in the presence of irregular jobs. Our topological ranking-based scheduling allows realistic irregular workloads to be processed while maintaining a significantly higher level of performance than existing schedulers.

Event details

  • When: 12th October 2017 13:00 - 14:00
  • Where: Cole 1.33b
  • Series: Systems Seminars Series
  • Format: Seminar

SRG Seminar: “Simulating a pulmonary tuberculosis infection using a network-based metapopulation model” by Michael Pitcher and “A Fake City of People: Modeling the Co-evolution of City and Citizens” by Xue Guo

Event details
When: 28th September 2017 13:00 – 14:00
Where: Cole 1.33b
Series: Systems Seminars Series
Format: Seminar

Michael Pitcher’s abstract

Tuberculosis (TB) is one of the world’s most deadly infectious diseases, claiming over 1.4 million lives every year. TB infections typically affect the lungs and treatment regimens are long and arduous, requiring at least 6 months of daily chemotherapy. Previous investigations have shown TB to have unique localisations within the lung at varying stages of infection. The initial implant and the primary lesion which arises from it can occur anywhere in the lungs, with a greater probability of occurrence in the lower to middle regions of the lung. However, reactivation of a previously latent form of disease always involves cavitation of the tissue at the apical regions. This difference in spatial location of TB infections suggests two important factors: i) bacteria are able to disseminate across the lung in some manner, and ii) the environment at the top of the lung has some properties that make it preferential for TB replication.

In this project, we aim to build a whole-organ model of the lung and surrounding lymphatics which incorporates both bacterial dissemination possibilities and lung tissue spatial heterogeneity in order to understand their impact on TB. We develop ComMeN (Compartmentalised Metapopulation Network), a Python framework designed to allow the easy creation of complex network-based metapopulations with spatial heterogeneity upon which interaction dynamics can be applied, with discrete event modelling using the Gillespie Algorithm. We then extend this framework to create a TB-specific model, PTBComMeN, which models a TB infection occurring over lung tissue which is divided into patches, each of which contains spatial attributes appropriate to its position in the lung, such as ventilation, perfusion and oxygen tension. Events dictate the interactions between cells and bacteria and their interaction with the environment, with dissemination occurring between edges joining patches on the lung network. This model allows experimentation into studying the effects spatial heterogeneities and bacterial dissemination may have on the progression of disease and the model is designed to provide insight into the factors that result in long treatment times for TB.

Xue Guo’s abstract

By the year 2050, the global urban population will reach 2.5 billion. While the fast pace of urbanisation brings improved quality of life initially, the surging population will inevitably lead to unique urban issues. Emerging research fields, with the aim of creating smarter cities, plan to counteract these problems. To facilitate this research, we need solid models to generate ’fake cities’, which cannot be easily produced by existing random graph algorithms due to spatial constraints. Therefore, we propose a new model for the co-evolution of city and population, which can show how street network forms, how population spreads and how settlements emerge and diminish. The new model will be a random city generator, which could be used to backtrack the history and predict the future of a city, or act as test cases for the validation and evaluation of urban optimisation algorithms.

Event details

  • When: 28th September 2017 13:00 - 14:00
  • Where: Cole 1.33b
  • Series: School Seminar Series, Systems Seminars Series
  • Format: Seminar

Semantics for probabilistic programming, Dr Chris Heunen

Semantics for probabilistic programming, Dr Chris Heunen

03.10.17, 1pm, Room JCB 1.33B

Abstract: Statistical models in e.g. machine learning are traditionally
expressed in some sort of flow charts. Writing sophisticated models
succintly is much easier in a fully fledged programming language. The
programmer can then rely on generic inference algorithms instead of
having to craft one for each model. Several such higher-order functional
probabilistic programming languages exist, but their semantics, and
hence correctness, are not clear. The problem is that the standard
semantics of probability theory, given by measurable spaces, does not
support function types. I will describe how to get around this.

Monads and Lenses – Dr James Cheney

Talk Title:  Monads and Lenses

Abstract:

Monads are an abstraction that can be used to mathematically model computational effects (among other things).  Lenses are an abstraction for bidirectional computation, a generalization of the view-update problem.  In this talk I will discuss ways to combine them and why it might be interesting to do so.

 

This talk is on joint work with Faris Abou-Saleh, Jeremy Gibbons, James McKinna and Perdita Stevens conducted as part of the recently-concluded project “A theory of least change for bidirectional transformations”.

Event details

  • When: 17th July 2017 13:00 - 14:00
  • Where: Cole 1.33a
  • Format: Colloquium, Seminar

SACHI Seminar: Benjamin Bach – Between Exploration and Explanation: Visualizations for Insights, Curiosity, and Storytelling

Please note that this seminar will now take place in Jack Cole 1.33A on Wednesday 5th July between 15:00 and 16:00

Title: Between Exploration and Explanation: Visualizations for Insights, Curiosity, and Storytelling.

Abstract: This talk presents a set of interactive visualizations for exploration and recent work in how to communicate insights through data-driven stories. In particular, I will present work on visualizing networks including an open-source online platform. Then, I will discuss comics as an approach to communicate not only changes in temporal data but to weave narration, textual explanations, and data visualizations. The questions raised by the talk are about effective ways to engage a larger audience in understanding, learning, and use of visualizations for exploration and communication. As visualizations are becoming more and more commonplace and familiar to people, we can see more and more aspects of our daily lives being potentially enriched with information presented visually. Eventually, I want to raise the question of which role novel technology such as Augmented and Virtual Reality can play in exploring, communicating, and interacting with visualizations.

Biography: Benjamin is a Lecturer in Design Informatics and Visualization at the University of Edinburgh. His research designs and investigates interactive information visualizations to help people explore, present, and understand information hidden in data. He focuses on the visualization of dynamic networks (e.g., social networks, brain connectivity networks), as well as temporal data (e.g., changes in videos and Wikipedia articles, events on timelines), comics for storytelling with visualizations, as well as visualization and interaction in Augmented and Virtual Reality. Before joining the University of Edinburgh in 2017, Benjamin worked as a postdoc at Harvard University, Monash University, as well as the Microsoft-Research Inria Joint Centre. Benjamin was visiting researcher at the University of Washington and Microsoft Research in 2015. He obtained his PhD in 2014 from the Université Paris Sud where he worked at the Aviz Group at Inria.

Event details

  • When: 5th July 2017 15:00 - 16:00
  • Where: Cole 1.33a
  • Format: Seminar

Please take part in our 10 minute survey about the use of Open Researcher and Contributor IDs (ORCID):

Are you a researcher or research student? Please take part in our 10 minute survey about the use of Open Researcher and Contributor IDs (ORCID):

This survey aims to establish the extent to which researchers at the University of St Andrews are using ORCID identifiers during their work. The survey will collect anonymous data about the awareness and use of ORCID iDs amongst researchers and will only take 5 – 10 minutes to complete.

You will be able to indicate your interest in taking part in a follow-up interview. This is entirely voluntary and does not affect participation in the online survey or its results.

You will also have a chance to win a £100 Amazon voucher by providing your email address at the end of the survey. Again, this is entirely voluntary and will be independent from participation in the voluntary follow-up interviews.

This research is carried out in the context of an MSc project by Eva Borger at the School of Computer Science in collaboration with the University Library. For more information, contact Eva at eb427@st-andrews.ac.uk .

To access the survey, follow this link:

https://standrews.eu.qualtrics.com/jfe/form/SV_7NIVceZa6cFomTb

Responses will be collected until 14th July 2017.

Ethics approval: CS12882

If you would like help setting up an ORCID ID or linking it to your Pure Profile, you can contact Jennifer Pritchard or Norman Stewart at purelive@st-andrews.ac.uk .

The Library’s Digital Research division also holds Open Office Hours every Wednesday 2pm-4pm, in the Old Union Diner, Butts Wynd (off North Street) where the team are available for advice regarding Open Access, Research Data Management, Pure, ORCID, Research Computing and Digital Humanities
https://www.st-andrews.ac.uk/library/services/researchsupport/

Thank you!

 

Eva Borger

PhD (Neuroscience)

MSc Student Management and IT

University of St Andrews

School of Computer Science

ORICDhttp://orcid.org/0000-0003-4965-2969

 

SACHI Seminar: Dr. Christopher Collins – Finding What to Read: Visual Text Analytics Tools and Techniques to Guide Investigation

Title:  Finding What to Read: Visual Text Analytics Tools and Techniques to Guide Investigation

Abstract:  Text is one of the most prominent forms of open data available, from social media to legal cases. Text visualizations are often critiqued for not being useful, for being unstructured and presenting data out of context (think: word clouds). I argue that we should not expect them to be a replacement for reading. In this talk I will briefly discuss the close/distant reading debate then focus on where I think text visualization can be useful: hypothesis generation and guiding investigation. Text visualization can help someone form questions about a large text collection, then drill down to investigate through targeted reading of the underlying source texts. Over the past 10 years my research focus has been primarily on creating techniques and systems for text analytics using visualization, across domains as diverse as legal studies, poetics, social media, and automotive safety.  I will review several of my past projects with particular attention to the capabilities and limitations of the technologies and tools we used, how we use semantics to structure visualizations, and the importance of providing interactive links to the source materials. In addition, I will discuss the design challenges which, while common across visualization, are particularly important with text (legibility, label fitting, finding appropriate levels of ‘zoom’).

Biography:  Dr. Christopher Collins is the Canada Research Chair in Linguistic Information Visualization and an Associate Professor of Computer Science at the University of Ontario Institute of Technology (UOIT).  His research focus is interdisciplinary, combining information visualization and human-computer interaction with natural language processing to address the challenges of information management and the problems of information overload.  His work has been published in many venues including IEEE Transactions on Visualization and Computer Graphics, and has been featured in popular media such as the Toronto Star and the New York Times Magazine.  He received his PhD in Computer Science from the University of Toronto.  Dr. Collins is a past member of the executive of the IEEE Visualization and Graphics Technical Committee and sits on the IEEE VIS Conference Organizing Committee.

Event details

  • When: 27th June 2017 14:00 - 15:00
  • Where: Cole 1.33b
  • Format: Seminar

Graduation Celebrations

Wednesday 21st June

As usual the school will host a small reception in the Jack Cole coffee area between 10.30 and 12.30, come along and enjoy a glass of bubbly and a cream cake or two in true Computer Science fashion!

All graduating students, their guests and staff members are invited.