Computational Foundry Seminar Series

DATE & TIME: Tuesday 20th March 2018 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Reasoning and Proof in International Criminal Trials: Reflections on the Karadzic Judgment

AUTHORS: Dr Yvonne McDermott Rees from the Hillary Rodham Clinton School of Law and Dr Federico Cerutti from Computer Science at Cardiff University

ABSTRACT: On 24 March 2016, the International Criminal Tribunal for the former Yugoslavia convicted Radovan Karadzic, former President of Republika Srpska (a Serb autonomous entity in Bosnia and Herzegovina), of genocide, crimes against humanity, and war crimes. In the context of a broader debate about how judges in international criminal trials analyse, synthesise, and weigh the enormous volumes of evidence (often more than a million pages) presented at trial, and how they draw inferences from that evidence, this talk discusses one particular finding in the Karadzic judgment - the finding that Karadzic possessed the specific intent for genocide in Srebrenica. It is based on a brief, co-authored with Dr Federico Cerutti of Cardiff University, which we submitted to the Karadzic Appeals Chamber in February 2018. I will discuss our experiences of applying principles of logic to legal findings, and the extent to which interplays can be found between logical reasoning and legal reasoning. 

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DATE & TIME: Tuesday 13th March 2018 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Psychology and Digital Innovation

AUTHORS: Dr Amy Jenkins from Department of Psychology, Swansea University

ABSTRACT: Dr Amy Jenkins (PhD) is a Research Fellow in the Department of Psychology, at Swansea University. Amy has an interest in: (i) The characterisation of subjective cognitive impairment (SCI): visual attention related processing, memory, anxiety, depression, personality, quality of life etc; (ii) The care pathways for people with SCI: the impact on the person, the health service and what can be done to improve it; (iii) The use of mobile technology for testing older adults cognitive functioning: design and usability of digital devices, the monitoring of cognitive functioning, and creative collaborative working.

Amy’s talk will be focusing on an introduction to her research area and its impact in practice. She will discuss cognitive testing and the great opportunities she has had working in collaboration with colleagues in computer science and CHERISH-DE. Lastly, Amy will highlight her future vision and how she is working on transferring her research findings into policy and practice.

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Computational Foundry Seminar Series

DATE & TIME: Tuesday 20th February 2018 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Explained Decision Making with Argumentation

AUTHORS: Fan Xiuyi from Swansea University

ABSTRACT: We present a study of explained decision making with argumentation, where decision making is viewed as a process of selecting “good” decisions amongst several alternatives and explanation are created to justify the selection. We consider two variants of this form of decision making, where the decision maker wants to select alternatives (1) meeting “most” goals, and (2) meeting “most preferred” goals. In turn, we distinguish amongst cases where the connections between goals and decisions are simply given via tables, and cases where they are given in terms of decision graphs incorporating defeasible and non-defeasible information. We draw connections between (these variants of) decision making and a structured argumentation framework, assumption-based argumentation (ABA), such that “good” decisions are admissible ABA arguments. Dispute Trees are used to establish these connections. They give transparency and accessibility to decision making, and pave the way to explaining the reasons why decisions are “good” as explanations can be readily extracted from the trees.

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DATE & TIME: Tuesday 13th February 2018 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Balancing privacy and functionality through accountable decryption

AUTHORS: Professor Mark Ryan from University of Birmingham

ABSTRACT: Our world is increasingly dominated by online services, which acquire huge amounts of data about our lives. This trend will be complete when we all have brain-computer interfaces, powered by an online service that processes our thoughts. How should we control this amassing of data? The seminar will examine the problem and some candidate solutions. It will describe a new primitive which we call "Accountable decryption", which may be a candidate concept to underlie an approach to the problem. Accountable decryption combines ideas from blockchain technologies and hardware-anchored security, to provide a means by which users could get information about how data about them is being processed.

BIO: Mark Ryan is Professor of Computer Security and leads the Security and Privacy group in Birmingham, where he also holds the HP Research Chair in Cyber Security. From 2010 to 2015, he was EPSRC Leadership Fellow, also at Birmingham. He is best known for his work on analysis of system security (e.g. electronic passport security and mobile phone security), electronic voting privacy and anonymity (e.g. in trusted computing, electronic voting, passports, telephones and e­mail), and the tension between security and privacy. In recent work, he has focussed on technologies that support the relationship between privacy and security.

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DATE & TIME: Tuesday 12th December 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Towards Heterogeneous and Scalable Model-Based Software Engineering

AUTHORS: Professor Dimitris Kolovos from the University of York

ABSTRACT:  Model-Based Software Engineering (MBSE) is an approach that promotes domain-specific models as first-class artefacts of the software development and maintenance lifecycle. As MBSE is increasingly used for the development of larger and more complex software systems (e.g. in the aerospace and automotive domains), the need for accommodating heterogeneous modelling technologies and notations in a scalable manner becomes essential. I will start my talk with an introduction to MBSE and a discussion of common application scenarios. I will then provide highlights from work we have been doing over the last decade on programming languages and tools for heterogeneous model management (validation, transformation, code generation) in the context of the Eclipse Epsilon platform (eclipse.org/epsilon), and will conclude with a discussion on scalability challenges such as incremental model transformation, validation and indexing that we are attempting to tackle in collaboration with partners from industry.

BIO: Dimitris Kolovos is a Professor of Software Engineering in the Department of Computer Science at the University of York, where he researches and teaches automated and model-based software engineering (MBSE). Dimitris is also an Eclipse Foundation committer, leading the development of the open-source Epsilon MBSE platform under the Eclipse Modelling project. He has published more than 120 peer-reviewed papers in the field of MBSE and his research has been funded through several national and European research projects, and InnovateUK Knowledge Transfer Partnerships.

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DATE & TIME: Tuesday 28th November 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Respiratory Innovation Wales - Harnessing Big Data to Improve Respiratory Health

AUTHORS: Gwyneth Davies

ABSTRACT: Respiratory Innovation Wales (RIW) comprises a coalition of senior clinical, experimental, and commercial staff across the NHS, Universities, and Industry in Wales.  RIW proposes a highly focused and collaborative enterprise - which will address the major human and cost burdens of diverse respiratory diseases in Wales - and which will commit itself to developing incisive solutions to these. A business plan for RIW has been submitted to Welsh government in October 2017. Success will be predicated on 5 strong pillars: Population Health and Informatics, Biobanking, Drug Development Acceleration, Devices & Technology, and Education.  RIW will build on SU’s strong position in health informatics, becoming a leading international centre for respiratory population health improvement. In the first five years RIW will demonstrate how digital data linkage can produce step changes in patient care, advance prudent prescribing and identify and target inequalities, thus bringing benefits to patients, clinicians and the wider economy. A strong USP will be linkage of a national biobank with population health data in the SAIL Databank.

BIO: Gwyneth Davies is a Respiratory Consultant and leads the Asthma service at ABMU Health Board. She has a particular interest in harnessing big data to improve respiratory health. Current work includes the development of a ‘Wales Asthma Observatory’ with a view to developing a Learning Health System for asthma in Wales. Gwyneth leads the UK Postgraduate Training Scheme for Asthma Researchers, for the Asthma UK Centre for Applied Research and co-leads a core programme on ‘Reducing asthma exacerbations, admissions and deaths’. She is joint Clinical Deputy Head of Swansea University Medical School. Gwyneth is leading the Population Health and Informatics pillar of the proposed Respiratory Innovation Wales initiative.

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DATE & TIME: Tuesday 21st November 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Person Re-identification in Wide-Area Surveillance

AUTHORS: Professor Shishir Shaw

ABSTRACT: Person re-identification is the problem of identifying a person from an image, given a set of gallery images of different persons across different cameras or varying viewing angles. It has various potential applications in the areas of automated video surveillance and human computer interaction. However, the task of person re-identification poses considerable difficulties due to variations in illumination, viewpoint, pose and even occlusion. A typical system designed for person re-identification takes a probe image and a set of gallery images, and tries to find the closest match of the probe image amongst the gallery images. Usually, matches are obtained by finding the gallery image which has the least distance from or the greatest similarity score with the probe image.  In this talk, I present an overview of the problem in the context of wide-area surveillance and its challenges.  In addition, I will discuss different perspectives for addressing this problem.

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DATE & TIME: Tuesday 14th November 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Computational Acoustic Levitation for Display Technologies

AUTHORS: Asier Marzo, Univeristy of Bristol

ABSTRACTProgrammed acoustic waves can levitate particles of a wide range of materials and sizes through air, water or biological tissues. New applications for Human-Computer Interaction (HCI) can be derived from the possibility of moving objects in mid-air to specific locations and even through obstacles. In the most basic configuration, we move particles over a surface to paint on sand or liquids at a distance and without contact. A more advanced, system positions a couple of objects in 3D allowing us to represent functions and positions of objects such as planes or asteroids. The ultimate goal is a display made of hundreds of levitating particles that move independently to form different shapes using computational acoustic waves

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DATE & TIME: Tuesday 31st October 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Finding the Perfect Triangle

AUTHORS: Sean Walton

ABSTRACT: Simulation has changed the way engineers approach their work.  No longer forced to build physical models and perform real experiments, simulation allows them to test thousands of ideas to find the perfect design.

As simulations have become increasingly accurate, researchers have focused efforts on reducing how long they take to calculate.  In this talk I will explain how trying to reduce this time led me to a somewhat under used simulation technique and a 6-year search for the perfect triangle.

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DATE & TIME: Tuesday 24th October 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Noncomputability in analysis

AUTHORS: Arno Pauly 

ABSTRACT: Many theorems in analysis state the existence of a certain object depending on some parameter. Each such theorem has an associated computational task: Compute the object from the parameter. From the viewpoint of a constructivist, these tasks are intricately linked to the meaningful truth of the theorems. From a pragmatic perspective, the applicability of a theorem to fields like physics or economics is tied to the solvability of the associated computational task.

We will see that many central theorems from analysis are actually not computable. Ironically, our prime example will be Brouwer's Fixed Point theorem. We can classify the extent of non-computability using the framework of Weihrauch degrees. Knowing the Weihrauch degree of a theorem entails a lot of information, for example whether the associated task might at least be probabilistically solvable, or whether it could be made solvable by adding a discrete advice parameter.

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DATE & TIME: Tuesday 17th October 2017 at 2pm

LOCATION: CoFo Seminar Room, 909 Talbot Building

TITLE: Safety-complete Test Suites

AUTHORS: Wen-ling Huang and Jan Peleska (presentation by Jan Peleska) 

ABSTRACT: This presentation is about property-oriented testing. A novel safety-related variant of complete test suites for finite state machines is introduced. Under certain hypotheses which are similar to the ones used in the well-known complete testing methods like W-Method, Wp-Method, HSI-Method, or H-Method, the new method guarantees to uncover every safety violation, while erroneous outputs without safety-relevance may remain undetected. In well-defined situations that can be precisely pre-determined from the reference model, this leads to a substantial reduction of test cases in comparison to the size of the analogous W, WP, HSI, H-test suites. We advocate this new test strategy for situations, where exhaustive testing of the complete system is too expensive. In these cases, strong guarantees with respect to fault coverage should only be given for the errors representing safety violations, while it is considered as acceptable if less critical errors remain undetected. An original version of this material has been published at the ICTSS 2017 conference; in this talk, we present a refined test suite based on the H-method which can be shown to always produce less or equally many test cases as when applying the original H-method. We sketch how this strategy can be extended to safety-complete equivalence class testing for systems with infinite input domains but finitely many internal states and finite output domains.