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During one of the oral presentations on 23 Nov, Dr Aravind Sesagirl Raamkumar, Scientist and Technical Lead of the Social & Cognitive Computing department at A*STAR's Institute of High Performance Computing (IHPC) shared some insights on 'Social Disease Surveillance and Public Sensing: Now & Future'. 

Dr Thomas Ang, Scientist from the Electronics & Photonics department at A*STAR Institute of High Performance Computing (A*STAR IHPC), presented a talk at the EOSAM 2022 titled 'Towards Integrated Single Photon Avalanche Detectors for Visible Light (Invited)', held at Porto, Portugal. 

Integrated avalanche photodetectors (APDs) are essential and ubiquitous devices in quantum photonics applications. While free-space APDs are a mature technology, the development of integrated APDs for visible light is still in its infancy. In this invited talk, we review our work on integrated photodetectors – the Germanium photodetector for O band, and the first integrated silicon (Si) APD for visible light. A unique feature of the integrated Si APD system for visible light is the end-fire coupling between the silicon nitride (SiN) waveguide and the Si APD in the same layer. This allows for broadband and high-efficiency coupling of light from the SiN waveguide to the Si APD for light detection, without the drawbacks of conventional interlayer coupling. Our work on integrated Si APDs based on Geiger-mode and our progress towards achieving single photon detection for visible light is discussed in the talk.

The research paper can be found on .

Corresponding authors:
Thomas Yong Long Ang¹*, Jun Rong Ong¹, Ray Jia Hong Ng¹, Soon Thor Lim¹, Trevor Rei Lee¹, Victor Leong²*, Salih Yanikgonul², Shawn Yohanes Siew³, Gundlapalli Prithvi², Hong Wang⁴, Leonid Krivitsky² and Ching Eng Png¹*

¹ A*STAR Institute of High Performance Computing
² A*STAR Institute of Materials Research and Engineering
³ Advanced Micro Foundry Pte Ltd
⁴ Silicon Technologies – Centre of Excellence, Nanyang Technological University,Singapore

About EOSAM

The European Optical Society Annual Meeting, EOSAM, is a major international scientific conference covering all aspects of optics and photonics, covered by topical meetings and sessions. It is attended annually by over 500 top researchers, key leaders, students, and industry experts. Each year EOSAM moves into different optics hubs better serving the local communities and at each time creating a unique EOSAM experience for the attendees. EOSAM has been previously organised in France, Scotland, Germany, Netherlands, Italy, and was also planned for Portugal in 2020, but was held online due to the pandemic.

Subject experts from the public agencies and institutes of higher learning (IHL) shared insights to climate change impact on urban microclimate and its influence on building performance, as well as the mitigation for urban overheating of cities and strategies for decarbonising buildings. The symposium also featured the current development works and potential research applications of the Integrated Environmental Modeller (IEM).

𝗦𝗜𝗧𝗘𝗠: Supporting Singapore’s planning for the transition to electric vehicles (EVs) nationwide by conducting advanced systems of systems modelling and analysis of the projected nationwide impact of electric vehicle (EV) charging demand.

𝗧𝗿𝗲𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Ascertain the effects of climate change on Singapore’s urban tree population by modelling the historical climate data and the projected scenarios, perform computational fluid dynamics (CFD) on both the microscale urban and individual tree models, field (instrumentation monitoring) and laboratory (wind tunnel, geotechnical) and performing tree-root modelling. 

Modelling and Simulation in Maritime Study and Disease Projection
Dr Yin Xiao Feng
Modelling and simulation have been used for decades to represent some system of interest in a similar but simpler form, and to evaluate the performance or investigate the behaviours under various configurations to be studied over long periods of time. It is the fundamental block of many digital twins that we are developing today. In this presentation, we will share some interesting studies our team have done in the areas of maritime and disease project. An in-house global maritime traffic model using big data analytics approaches is established as the backbone knowledge base to support a variety of applications such as the route prediction and planning, and navigation safety studies. AI embedded simulation and projection of vessel movements, traffic density, hotspot detection and prediction, and collision detection and early warning are developed as tools to assist port authority for safe navigation. We will also share some studies in diabetes modelling and projection and simulation of COVID-19 screening regime for cross-border travellers. 

Modelling Train Disruptions through Integrated Multi-modal Simulation
Mr Nasri Bin Othman
Train disruptions are highly challenging to simulate. Major train disruptions can impact hundreds of thousands of commuters, leading to cascading congestion throughout the transportation infrastructure and across other modes. Here we present an integrated agent-based simulation approach to modelling train disruptions. Using our Fabric integration framework, we combine train, bus and taxi agent-based models into a single platform, which we then extend with disruption mechanisms and dynamic disruption-aware commuter behaviour. Our approach enables us to estimate the impact of disruptions on commuter ride experiences, and further enables transportation modellers to compare and evaluate mitigation strategies such as bridging bus services. We also discuss computational optimisations to reduce the runtime of a full-scale 24-hour islandwide simulation to under two hours.

Co-organised by supercomputing centres of the region including those in Australia, Japan, �����and Thailand and anchored by the National Supercomputing Centre (NSCC) Singapore, the SupercomputingAsia (SCA) conference incorporates a number of important supercomputing and allied events that together aim to promote a vibrant and shared high-performance computing (HPC) ecosystem, for both the public and private sectors, in Asia. Although it is held in �����for 2022, it will be a hybrid event featuring inclusive activities across Asia.

Dr Freda Lim, Deputy Department Director, and Dr Adrian Mak, Senior Scientist from the Materials Science & Chemistry department at A*STAR's Institute of High Performance Computing (IHPC) will be moderating the panel discussion at SupercomputingAsia 2022 - Day 2. 

[Panel Discussion]
Session 1: HPC Upskilling - Students & Teachers Building Workforce-ready HPC Skills
2 Mar 2022 | 2:45pm - 3:15pm, �����Time

Session 2: HPC without Borders - Cross-Centre Collaboration to Upskill HPC Users
2 Mar 2022 | 5:15pm - 5:45pm, �����Time

Dr Yang Yinping, Senior Scientist from the Social & Cognitive Computing department at A*STAR's Institute of High Performance Computing (IHPC) will share her research journey in affective computing and emotion analysis. She will also introduce a new research programme that aims to discover the mysterious pathways related to diversity, unconscious and second-generation gender bias, empathy, trust, effective teamwork, and innovation outcomes at SupercomputingAsia 2022 - Day 3.

Breakout Track: From Surviving to Thriving: A Search of Thriving with Diversity and Inclusivity
3 Mar 2022 | 2:15pm - 2:35pm, �����Time

In his talk titled Future Trends in Maritime AI and Data Analytics, Dr Lim Keng Hui, Executive Director at A*STAR's Institute of High Performance Computing (IHPC) will share examples of how AI and digitalisation are used to address real world challenges in the maritime industry, and how A*STAR is working with companies in areas such as maritime safety, port operations optimisation, and green shipping. Dr Lim will also discuss future trends to enable digital transformations in the maritime industry, and present an outline of a national Maritime AI programme that �����Maritime Institute (SMI) and A*STAR are developing which we aim to seek R&D partnerships to create impact in our ecosystem.