Seminar

DHSI Seminar Series (Digital Health Science Initiative)

“Addiction”

Seminar Room 1 School of Medicine

12:00: Alex Baldacchino- Introduction

12:15: Ognjen Arandjelović & Aniqa Aslam- Understanding Fatal and Non-Fatal Drug Overdose Risk Factors in Fife: Overdose Risk (OdRi) tool

12:45: Damien Williams & Fergus Neville- Transdermal alcohol monitoring

13:15: David Harris-Birtill & David Morrison- Narco Cat – waste water analysis in substance misuse – a novel epidemiological tool

13:15 – 14.00: All Questions & Opportunities

Event details

  • When: 14th June 2017 12:00 - 14:00
  • Where: N Haugh, St Andrews
  • Format: Seminar

Dr. Ornela Dardha’ talk: Session Types Revisited

Event Location: School of Medicine, Seminar room 1

Abstract:
Session types are a formalism to model structured communication-based programming. A session type describes communication by specifying the type and direction of data exchanged between two parties. We show that session types are encodable in more primitive and foundational pi-calculus types. Besides providing an expressivity result, the encoding: (i) removes redundancies in the syntax of session types, and (ii) yields standard properties of session types as straightforward corollaries, exploiting the corresponding properties of standard typed pi-calculus. The robustness of the encoding is tested on a few extensions of session types, including subtyping, polymorphism, and higher-order communications. In this talk we present the encoding, some of its applications and recent developments.

 

Event details

  • When: 4th July 2017 14:00 - 15:00
  • Where: N Haugh, St Andrews
  • Format: Seminar

SACHI Seminar: Daniel Vogel, University of Waterloo

Title:  New Approaches to Mode-Switching

Abstract:  The fundamental unit of all interaction is issuing commands, and the trickiest types of commands are those that control “modes” — different ways to map the same input to different application actions. For example, the current mode in a tablet drawing app could determine if the exact same sequence of touch movements draws a line, pans the canvas, makes a marquee selection, or issues a gestural command. Switching between modes like these are frequent, so finding optimum mode-switching methods is important.  In this talk, I survey my group’s work to understand and improve mode-switching and command selection for different input types and device form factors. These include: Pin-and-Cross, a touch overloading technique combining static touches with nearby crossing selection; Conté, a pen-like input device that leverages small changes in contact geometry; Doppio, a reconfigurable two-faced smartwatch for tangible input; and Gunslinger, a mid-air interaction technique using bare hand postures and gestures performed in a relaxed arms-down position.

Bio:  Daniel Vogel is an Assistant Professor and co-director of the Human-Computer Interaction Lab in the Cheriton School of Computer Science at the University of Waterloo. His research interests are fundamental characteristics of input and novel forms of interaction for current and future computing form factors like touch, tangibles, large displays, mid-air gestures, and whole-body input. In addition to earning PhD and MSc degrees from the University of Toronto, Dan holds a BFA from the Emily Carr University of Art + Design, and he leverages his combined art and science background in his research. For example, he was recently awarded a major grant to build a $1.8 million lab to explore the intersection of HCI and Fine Art in spatial augmented reality. Dan’s 2004 paper on interactive ambient displays is one of the ten most cited papers in the nineteen-year history of ACM UIST, and he has received honours including: multiple best paper awards at ACM CHI; the Bill Buxton Dissertation Award (2010); a Banting Postdoctoral Fellowship (2011 – 2013), and an Ontario Early Researcher Award (2017).

Event details

  • When: 15th June 2017 14:00 - 15:00
  • Where: Maths Theatre B
  • Format: Seminar

Simon Fowler Seminar: First-Class Distributed Session Types

Session types codify communication patterns, giving developers guarantees that applications satisfy predefined protocols. Session types have come a long way from their theoretical roots: recent work has seen the implementation of static analysis tools; embeddings into a multitude of programming languages; and the integration of session types into languages as a first-class language construct.

Work at Edinburgh has concentrated on the latter. Lindley and Morris have extended the experimental functional programmming language Links with session-typed hannels in a multithreaded setting.

Distribution, however, brings challenges such as failure and the need for distributed channel delegation algorithms. In this talk, I will demonstrate and discuss the design and implementation of session types in Links. I will describe my recent work on adding support for distribution to Links, allowing the creation of session-typed, multi-user web applications.

Finally, I will describe recent, in-progress, work on a static type system and semantics allowing the controlled relaxation of the requirement of *linearity* (that
every endpoint must be used exactly once) to that of affinity (that every endpoint must be used at most once) in order to account for the question of users leaving a session midway through, and describe how the system still retains core metatheoretic pro

Event details

  • When: 5th June 2017 13:00 - 14:00
  • Where: Cole 1.33a
  • Format: Seminar

Seminar: Propagation and Reification: SAT and SMT in Prolog (continued)

Jacob Howe, City University, London

Abstract: This talk will recap how a watched literal DPLL based SAT solver can be succinctly coded in 20 lines of Prolog. The focus of the talk will be the extension of this solver to an SMT solver which will be discussed with a particular focus on the case where the theory is that of rational-tree constraints, and its application in a reverse engineering problem.
[Note change of time from that previously advertised]

Event details

  • When: 23rd June 2017 13:00 - 14:00
  • Where: Cole 1.33a
  • Series: AI Seminar Series
  • Format: Seminar

SRG Seminar: Evaluation Techniques for Detection Model Performance in Anomaly Network Intrusion Detection System by Amjad Al Tobi

Everyday advancements in technology brings with it novel challenges and threats. Such advancement imposes greater risks than ever on systems and services, including individual privacy information. Relying on intrusion specialists to come up with new signatures to detect different types of new attacks, does not seem to scale with excessive traffic growth. Therefore, anomaly-based detection provides a promising solution for this problem area.

Anomaly-based IDS applies machine learning, data mining and/or artificial intelligence along with many other methods to solve this problem. Currently, these solutions seem not to be tractable for real production environments due to the high false alarms rate. This might be a result of such systems not being able to determine the point at which an update is required. It is not clear how detection models will behave over time, when traffic behaviour has changed since the last time the model was re-generated.
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Event details

  • When: 1st June 2017 13:00 - 14:00
  • Where: Cole 1.33b
  • Series: Systems Seminars Series
  • Format: Seminar

SACHI Seminar: Mike Hazas, Lancaster University

 

Title:  Internet services, energy demand and everyday life

Abstract:  Over the last decade, the growth in data traffic across the Internet has been dramatic, and forecasts predict a similar ongoing pattern. Since this is associated with remarkable electricity consumption (about 10% globally, and rising), such a trend is significant to efforts to reduce carbon emissions.  This calls for careful attention to the nature of these trends, as levels of Internet electricity demand become ever more directly and explicitly problematic.  Based on a host of prior literature and two field studies, this talk explores what we know about the energy intensity of digital stuff, and the growth of Internet traffic.  It considers how such traffic can be attributed to different Internet services like video streaming or social networking, and how these link to everyday practices which draw upon and generate data online.

Biography:  Dr Mike Hazas is a Senior Lecturer at Lancaster University, who works at the confluence of human-computer interaction and social science. His research combines qualitative and quantitative methods to understand everyday practices and technologies, how they can be related to carbon emissions and energy demand, and more sustainable trajectories. Mike co-directs the multidisciplinary Socio-Digital Sustainability group at Lancaster, and has served as a chair of the CHI Specific Application Areas subcommittee for the last three years.  Mike is a co-investigator in the DEMAND Centre (EPSRC, 2013-2018) which is concerned with the relationship of social practices and energy demand.

Event details

  • When: 30th May 2017 14:00 - 15:00
  • Where: Cole 1.33a
  • Format: Seminar

SRG Seminar: New Network Functionality using ILNPv6 and DNS by Khawar Shehzad

This research deals with the introduction of a new network functionality based on Identifier-Locator Network Protocol version 6 (ILNPv6), and Domain Name System (DNS). The chosen area of concern is security and specifically mitigation of Distributed Denial of Service (DDoS). The functionality proposed and tested deals with the issues of vulnerability testing, probing, and scanning which directly lead to a successful DDoS attack. The solutions presented can be used as a reactive measure to these security issues. The DDoS is chosen because in recent years DDoS have become the most common and hard to defend attacks. These attacks are on the availability of system/site. There are multiple solutions in the literature but no one solution is based on ILNPv6, and are complex in nature. Similarly, the solutions in literature either require modification in the providers’ networks or they are complex if they are only site-based solutions. Most of these solutions are based on IPv6 protocol and they do not use the concept of naming, as proposed by ILNPv6.

The prime objectives of this research are:

  • to defend against DDoS attacks with the use of naming and DNS
  • to increase the attacker’s effort, reduce vulnerability testing, and random probing by attackers
  • to practically demonstrate the effectiveness of the ILNPv6-based solution for security

Event details

  • When: 18th May 2017 13:00 - 14:00
  • Where: Cole 1.33b
  • Series: Systems Seminars Series
  • Format: Seminar

Translational Research into Common Psychiatric Disorders, Professor Douglas Steele, Professor of Neuroimaging / Consultant Psychiatrist, University of Dundee

Translational Neuroimaging Based Psychiatric Research

Computational methods are having a considerable influence on contemporary neuroscience research: in data collection (non-invasive functional brain imaging), data analysis and computational modelling of healthy and abnormal brain and behaviour. The presentation is in two parts. Part 1 is an overview of the current main computational-neuroscience areas in research. Part 2 focuses on some recent high impact research into potential empirical and mechanistic biomarkers for psychiatric disorders.

Event details

  • When: 24th April 2017 14:00 - 15:00
  • Where: Cole 1.33a
  • Format: Colloquium, Seminar, Talk

SRG Seminar: “Evaluating Data Linkage: Creation and use of synthetic data for comprehensive linkage evaluation” by Tom Dalton and “Container orchestration” by Uchechukwu Awada

The abstract of Tom’s talk:

“Data linkage approaches are often evaluated with small or few data sets. If a linkage approach is to be used widely, quantifying its performance with varying data sets would be beneficial. In addition, given a data set needs to be linked, the true links are by definition unknown. The success of a linkage approach is thus difficult to comprehensively evaluate.

This talk focuses on the use of many synthetic data sets for the evaluation of linkage quality achieved by automatic linkage algorithms in the domain of population reconstruction. It presents an evaluation approach which considers linkage quality when characteristics of the population are varied. We envisage a sequence of experiments where a set of populations are generated to consider how linkage quality varies across different populations: with the same characteristics, with differing characteristics, and with differing types and levels of corruption. The performance of an approach at scale is also considered.

The approach to generate synthetic populations with varying characteristics on demand will also be addressed. The use of synthetic populations has the advantage that all the true links are known, thus allowing evaluation as if with real-world ‘gold-standard’ linked data sets.

Given the large number of data sets evaluated against we also give consideration as to how to present these findings. The ability to assess variations in linkage quality across many data sets will assist in the development of new linkage approaches and identifying areas where existing linkage approaches may be more widely applied.”

The abstract of Awada’s talk:

“Over the years, there has been rapid development in the area of software development. A recent innovation in software or application deployment and execution is the use of Containers. Containers provide a lightweight, isolated and well-defined execution environment. Application container like Docker, wrap up a piece of software in a complete file-system that contain everything it needs to run: code, runtime, system tools, system libraries, etc. To support and simplify large-scale deployment, cloud computing providers (i.e., AWS, Google, Microsoft, etc) have recently introduced Container Service Platforms (CSPs), which support automated and flexible orchestration of containerised applications on container-instances (virtual machines).

Existing CSP frameworks do not offer any form of intelligent resource scheduling: applications are usually scheduled individually, rather than taking a holistic view of all registered applications and available resources in the cloud. This can result in increased execution times for applications, and resource wastage through under utilised container-instances; but also a reduction in the number of applications that can be deployed, given the available resources. In addition, current CSP frameworks do not currently support: the deployment and scaling of containers across multiple regions at the same time; merging containers into a multi-container unit in order to achieve higher cluster utilisation and reduced execution times.

Our research aims to extend the existing system by adding a cloud-based Container Management Service (CMS) framework that offers increased deployment density, scalability and resource efficiency. CMS provides additional functionalities for orchestrating containerised applications by joint optimisation of sets of containerised applications and resource pool in multiple (geographical distributed) cloud regions. We evaluate CMS on a cloud-based CSPs i.e., Amazon EC2 Container Management Service (ECS) and conducted extensive experiments using sets of CPU and Memory intensive containerised applications against the custom deployment strategy of Amazon ECS. The results show that CMS achieves up to 25% higher cluster utilisation and up to 70% reduction in execution times.”

Event details

  • When: 20th April 2017 13:00 - 14:00
  • Where: Cole 1.33b
  • Series: Systems Seminars Series
  • Format: Seminar