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FRET and optical trapping reveal mechanisms of actin activation of the power stroke and phosphate release in myosin V [Enzymology]

Myosins generate force and motion by precisely coordinating their mechanical and chemical cycles, but the nature and timing of this coordination remains controversial. We utilized a FRET approach to examine the kinetics of structural changes in the force-generating lever arm in myosin V. We directly compared the FRET results with single-molecule mechanical events examined by optical trapping. We introduced a mutation (S217A) in the conserved switch I region of the active site to examine how myosin couples structural changes in the actin- and nucleotide-binding regions with force generation. Specifically, S217A enhanced the maximum rate of lever arm priming (recovery stroke) while slowing ATP hydrolysis, demonstrating that it uncouples these two steps. We determined that the mutation dramatically slows both actin-induced rotation of the lever arm (power stroke) and phosphate release (≥10-fold), whereas our simulations suggest that the maximum rate of both steps is unchanged by the mutation. Time-resolved FRET revealed that the structure of the pre– and post–power stroke conformations and mole fractions of these conformations were not altered by the mutation. Optical trapping results demonstrated that S217A does not dramatically alter unitary displacements or slow the working stroke rate constant, consistent with the mutation disrupting an actin-induced conformational change prior to the power stroke. We propose that communication between the actin- and nucleotide-binding regions of myosin assures a proper actin-binding interface and active site have formed before producing a power stroke. Variability in this coupling is likely crucial for mediating motor-based functions such as muscle contraction and intracellular transport.




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Identification of compounds that bind the centriolar protein SAS-6 and inhibit its oligomerization [Computational Biology]

Centrioles are key eukaryotic organelles that are responsible for the formation of cilia and flagella, and for organizing the microtubule network and the mitotic spindle in animals. Centriole assembly requires oligomerization of the essential protein spindle assembly abnormal 6 (SAS-6), which forms a structural scaffold templating the organization of further organelle components. A dimerization interaction between SAS-6 N-terminal “head” domains was previously shown to be essential for protein oligomerization in vitro and for function in centriole assembly. Here, we developed a pharmacophore model allowing us to assemble a library of low-molecular-weight ligands predicted to bind the SAS-6 head domain and inhibit protein oligomerization. We demonstrate using NMR spectroscopy that a ligand from this family binds at the head domain dimerization site of algae, nematode, and human SAS-6 variants, but also that another ligand specifically recognizes human SAS-6. Atomistic molecular dynamics simulations starting from SAS-6 head domain crystallographic structures, including that of the human head domain which we now resolve, suggest that ligand specificity derives from favorable Van der Waals interactions with a hydrophobic cavity at the dimerization site.




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Shared requirements for key residues in the antibiotic resistance enzymes ErmC and ErmE suggest a common mode of RNA recognition [Enzymology]

Erythromycin-resistance methyltransferases are SAM dependent Rossmann fold methyltransferases that convert A2058 of 23S rRNA to m6 2A2058. This modification sterically blocks binding of several classes of antibiotics to 23S rRNA, resulting in a multidrug-resistant phenotype in bacteria expressing the enzyme. ErmC is an erythromycin resistance methyltransferase found in many Gram-positive pathogens, whereas ErmE is found in the soil bacterium that biosynthesizes erythromycin. Whether ErmC and ErmE, which possess only 24% sequence identity, use similar structural elements for rRNA substrate recognition and positioning is not known. To investigate this question, we used structural data from related proteins to guide site-saturation mutagenesis of key residues and characterized selected variants by antibiotic susceptibility testing, single turnover kinetics, and RNA affinity–binding assays. We demonstrate that residues in α4, α5, and the α5-α6 linker are essential for methyltransferase function, including an aromatic residue on α4 that likely forms stacking interactions with the substrate adenosine and basic residues in α5 and the α5-α6 linker that likely mediate conformational rearrangements in the protein and cognate rRNA upon interaction. The functional studies led us to a new structural model for the ErmC or ErmE-rRNA complex.





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A translation of “classification of four-vectors of an 8-dimensional space”, by Antonyan, L. V., with an appendix by the translator

L. Oeding
Trans. Moscow Math. Soc. 83 (), 227-250.
Abstract, references and article information




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Existence and uniqueness result for reaction-diffusion model of diffusive population dynamics

A. Kh. Khachatryan, Kh. A. Khachatryan and A. Zh. Narimanyan
Trans. Moscow Math. Soc. 83 (), 183-200.
Abstract, references and article information








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Visualizing the Data: The Evolution of Trade Tensions in Metals and Minerals Markets

Visualizing the Data: The Evolution of Trade Tensions in Metals and Minerals Markets 18 January 2018 — 4:30PM TO 6:00PM Anonymous (not verified) 19 December 2017 Chatham House, London

Over the past decade, producer countries such as South Africa, Zambia, Indonesia, the DRC and, most recently, Tanzania have restricted exports of unprocessed precious metals, copper, nickel, cobalt and other minerals in an attempt to support, or create, downstream processing industries and jobs or increase revenues. These moves have invariably created tensions with trading partners. Research suggests that export restrictions are not the best way to achieve such policy objectives and can instead harm the producer country’s economy and undermine the functioning of international metals and minerals.

Drawing on OECD and Chatham House research on resource trade, the speaker will present analysis and data visualizations exploring the drivers of past export restrictions and their political and economic impacts. They will also consider how the drivers of ‘resource nationalist measures’ are changing, whether and where export restrictions might present strategic and economic risks in the current context, and the extent to which producer and consumer governments and international governance mechanisms are prepared to address them.

Attendance at this event is by invitation only.




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Fossil Fuels Expert Roundtable: How Solar is Shaping the Energy Transition

Fossil Fuels Expert Roundtable: How Solar is Shaping the Energy Transition 1 June 2018 — 9:00AM TO 10:30AM Anonymous (not verified) 22 May 2018 Chatham House, London

As global temperatures rise and extreme weather events multiply, doubts over the reality and imminence of climate change have dissipated. Despite this, there is a clear lack of urgency by governments to the approaching crisis. At this event, Prem Shankar Jha will set out what he believes are the three main causes for this inaction.

Furthermore, he will argue that catastrophic climate change is imminent, but even if it weren’t, the risk is too great to ignore. Only a complete shift from fossil fuels by 2070 at the latest would provide reasonable certainty of avoiding irreversible consequences. This transition is not only possible but the technologies to enable it were harnessed four to nine decades ago – and all of them draw their primary energy from the sun. These technologies are already capable of delivering electricity, transport fuels, and petrochemicals at prices that are competitive with the current delivered cost of electricity in the US and Western Europe. So what is holding up the energy shift?

Attendance at this event is by invitation only.




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Korea's New Energy Policy and Implications for LNG Imports

Korea's New Energy Policy and Implications for LNG Imports 3 October 2018 — 9:00AM TO 10:30AM Anonymous (not verified) 17 September 2018 Chatham House | 10 St James's Square | London | SW1Y 4LE

The new energy policy of Moon Jae-In’s administration aims to swing radically from coal and nuclear towards renewables and LNG for power generation. During the last 12 months the priority given to the expansion of renewable energy has been overwhelming and the support for the expansion of gas not as strong as many observers had expected. The 13th gas supply and demand plan announced in Spring 2018 confirmed the trend. Based on this projection, Professor K. Paik will discuss how this new energy policy will affect Korea’s LNG imports strategy and what are the implications of Korea’s northern policy towards this LNG supply strategy and pipeline gas imports to the Korean Peninsula.

Attendance at this event is by invitation only.




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Realizing the Potential of Extractives for Industrial and Economic Development

Realizing the Potential of Extractives for Industrial and Economic Development 18 October 2018 — 5:30PM TO 7:00PM Anonymous (not verified) 3 October 2018 Chatham House | 10 St James's Square | London | SW1Y 4LE

Over the past two decades, the extractives industries have risen in importance for many low- and middle- income countries their prospects for economic development and poverty reduction. During a period of rising commodities prices, the development of extractives became increasingly attractive to both governments and companies. There was - and remains - much discussion about their potential to support inclusive development.

However, there are also risks and uncertainties associated with the extractives industries and many things can, and do, go wrong. Fluctuations in commodity prices can be hard to manage and can lead to considerable fiscal pressures. In the longer-term, climate change and the various policy responses to this, will profoundly affect the extractives sector as renewables replace fossil fuels in the global energy mix.

Managing the extractives sectors will therefore remain highly challenging especially in low-income countries where institutions are often weak. This roundtable will bring together some of the foremost academics and practitioners working in the extractives industries and also in economic development to discuss a major new UNU-WIDER study Extractive Industries: The Management of Resources as a Driver of Sustainable Development.

Attendance at this event is by invitation only.




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The Impact of Brexit on Energy Transformation in the UK and EU

The Impact of Brexit on Energy Transformation in the UK and EU 28 March 2019 — 8:15AM TO 9:45AM Anonymous (not verified) 3 December 2018 Chatham House | 10 St James's Square | London | SW1Y 4LE

The UK’s decision to leave the EU will fundamentally reshape many of the UK’s policies and its relations with countries around the world. For energy and climate, the changes could be significant and will need to be managed carefully to secure ongoing investment, stable energy prices and ambitious climate objectives. The UK’s departure will also affect the balance of political support for climate and energy policies with the EU institutions and potentially impact upon regional initiatives.

This roundtable will discuss:

  • The impact on the energy sector of Brexit during the transition period through until December 2020 including the operation of interconnectors and access to the Internal energy market, ongoing engagement in European research collaboration and the replacement of European financial resources.
  • The possible opportunities and risks for the UK’s energy sector in 2021 and beyond.
  • The implications of Brexit on the EU’s energy and climate policy.

The roundtable will discuss the role of the public and business in shaping the future deal as it will need to be ratified by the parliaments of all member states.

Attendance at this event is by invitation only.




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The Global Implications of China's Energy Revolution

The Global Implications of China's Energy Revolution 4 March 2019 — 9:00AM TO 10:30AM Anonymous (not verified) 7 February 2019 Chatham House | 10 St James's Square | London | SW1Y 4LE

Ten years ago, it would have been difficult to believe that China – the world’s largest greenhouse gas emitter – would be one of the global leaders in some elements of clean energy development and deployment. With increasing air pollution and predominantly coal-fired power generation fueled by a booming economy and population, China has had to rethink its approach to environmental protection and climate mitigation.

Strong government signalling and national policies have led to the construction of the world’s largest fleets, wind farms and solar photovoltaic arrays in an effort to reduce national GDP intensities of energy and CO2 emissions. How has the availability of large amounts of capital, and the number of state-owned companies with soft budgetary constraints, helped contribute to this?

Against this backdrop, this event will consider how China must re-evaluate its approach to energy security – coal made up the majority of the country’s energy in 2016, followed by oil, of which 65 per cent had to be imported – despite the country being one of the pioneers of renewable energy. This event will look at how, in delivering on its clean energy objectives, China could redefine the traditional energy security paradox and in fact become more resilient to previously overlooked vulnerabilities.




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Driven to Extraction: Can Sand Mining be Sustainable?

Driven to Extraction: Can Sand Mining be Sustainable? 5 June 2019 — 1:30PM TO 3:00PM Anonymous (not verified) 29 April 2019 Chatham House | 10 St James's Square | London | SW1Y 4LE

Sand is the most consumed raw material in the world after water and is a critical building block of the modern world. When bound with cement, it becomes concrete; when mixed with bitumen, it becomes asphalt; and when heated, it becomes glass.
According to a recent UN Environment Programme report, the world extracts over 40 billion tonnes of sand and aggregates every year. This is the equivalent of 18 kilograms per day per person – or enough to build a wall of sand 27 metres wide and 27 metres high around the entire globe each year. Sand extraction on this scale, particularly when taken from riverine or coastal locations, can have serious environmental impacts on ecosystems, biodiversity and erosion. Control of sand resources has also proved a source of tension between countries and violence within them.
With demand for sand set to increase dramatically in line with population growth and urbanization, and with growing policy attention on the decarbonization of cement and other industrial inputs, better understanding of these impacts is needed. Yet with limited data on sand extraction, trade and consumption, and little in the way of governance frameworks, developing policies and practices that help ensure sustainable sand supply chains is challenging. This roundtable will examine the environmental, economic and political implications of sand supply chains and discuss opportunities to help integrate sustainable policy and practice.




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Nuclear Energy in a Post-Brexit Europe

Nuclear Energy in a Post-Brexit Europe 11 October 2019 — 8:30AM TO 10:00AM Anonymous (not verified) 18 September 2019 Chatham House | 10 St James's Square | London | SW1Y 4LE

Brexit will significantly change the balance within the EU in relation to nuclear energy. Apart from France and Finland, both of whose nuclear development programmes are behind schedule, the UK is the only member state in northern or western Europe currently investing in new nuclear capacity. Brexit will therefore leave the supporters of nuclear energy within the EU27 and the European Commission in a weaker position.

The speaker will argue that at a time when the energy industry needs to accelerate its shift away from fossil fuels, and when the electricity generation industry must cut its carbon emissions faster than it has ever managed to do in the past, this change is unhelpful.

The workshop will also address the need for additional interconnector capacity and the future of carbon-trading outside the EU emission trading system and how this relates to potential nuclear energy capacity.

Attendance at this event is by invitation only.




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Net Zero and Beyond: What Role for Bioenergy with Carbon Capture and Storage?

Net Zero and Beyond: What Role for Bioenergy with Carbon Capture and Storage? 23 January 2020 — 8:30AM TO 10:00AM Anonymous (not verified) 6 January 2020 Chatham House | 10 St James's Square | London | SW1Y 4LE

In the context of the feasibility of reducing greenhouse gas emissions to net zero, policymakers are beginning to pay more attention to options for removing carbon dioxide from the atmosphere. A wide range of potential carbon dioxide removal (CDR) options are currently being discussed and modelled though the most prominent among them are bioenergy with carbon capture and storage (BECCS) and afforestation and reforestation.

There are many reasons to question the reliance on BECCS assumed in the models including the carbon balances achievable, its substantial needs for land, water and other inputs and technically and economically viable carbon capture and storage technologies.

This meeting will examine the potentials and challenges of BECCS in the context of other CDR and emissions abatement options. It will discuss the requisite policy and regulatory frameworks to minimize sustainability and socio-political risks of CDR approaches while also avoiding overshooting climate goals.

Attendance at this event is by invitation only.




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Energy transitions

Energy transitions

Analysing and understanding the implications of the global energy transition, and what it means for states, communities and people facing these changes.

nfaulds-adams… 16 January 2020

The world is undergoing an energy transformation, and at its heart is the need to reduce energy-related carbon emissions to limit climate change. But decarbonization of the energy sector – moving away from fossil fuels towards low carbon sources of energy – requires urgent action on a global scale.

Our work focuses on three primary components:

  • Clean and renewable energy
  • Energy access
  • Extractives

This transition will be enabled by technological innovations, the market, improvements to policy and regulatory frameworks, and by increasing awareness – and actions – from consumers all over the world.




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Environmental Change and Emerging Diseases

Environmental Change and Emerging Diseases 28 October 2020 — 3:00PM TO 4:00PM Anonymous (not verified) 13 October 2020 Online

Understanding how environmental changes are directly and indirectly affecting the emergence and spread of disease has assumed global importance.

There is growing awareness that deforestation and land-use conversion, urbanization, human migration, international commerce, and climate change are having significant impacts on human health, but their impact on increasing infectious disease risks has only become more evident with the coronavirus pandemic.

With climate change, and environmental change more generally, disrupting ecologies, and people interacting with wildlife in new ways, it creates the conditions for new diseases to emerge: a better understanding of the health dimensions of environmental change will be critical to managing pandemic risks in future. 

Our event will examine the relationship between environmental change and disease, how these linkages have manifested in historical outbreaks and in the coronavirus pandemic, and the role of environmental policies in minimizing the risk of future emerging diseases.  What can be done to ensure equitable action? What can we learn from our responses to previous pandemics? And will the growing recognition of the diverse risks arising from climate change motivate more climate action?

This event will launch the Energy, Environment and Resources (EER) Programme’s Environment and Society Discussion Series. This series aims to provide a platform to promote interdisciplinary knowledge sharing and policy dialogue to mitigate and adapt to the impacts that climate change, biodiversity loss and natural resource depletion are having on people and communities globally, and on geopolitics, security and international development.

Sign up to find out about more events in this series here




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Moving Food up the Political Agenda

Moving Food up the Political Agenda 14 December 2020 — 3:00PM TO 4:30PM Anonymous (not verified) 8 December 2020 Online

How can food system transformation be woven into high level biodiversity, nutrition and climate forums in 2021?

Adverse impacts on food security are expected to worsen as global temperatures continue to rise. As well as feeling the impacts of climate change, food systems drive it in a number of ways. Not only do food systems contribute more to greenhouse gas emissions than any other parts of our lives, they are also the leading driver of biodiversity loss, the largest cause of deforestation and occupy the most land globally.

On our current trajectory, 1.5°C of warming could become a reality in the next 5-10 years. Transforming food systems to meet climate, biodiversity and food security goals is crucial. If left to continue, food alone could take us over 1.5°C this century – even with maximum efforts in the energy sector.

Unprecedented levels of action to transform food systems is required over the next decade. The coming year is described as a ‘super year’ given the numerous high-level global events taking place that cover climate, biodiversity and food security. The year ahead has also been identified as the final opportunity to bring global commitments in line with the goals of the Paris Agreement.

What can be achieved in the super year? How can food system transformation be woven into high level biodiversity, nutrition and climate forums during the super year? How can momentum from the super year be built upon, to ensure meaningful action is taken over the next decade?




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What's next for environmental peacebuilding? Lessons learned and opportunities from conflict-affected states

What's next for environmental peacebuilding? Lessons learned and opportunities from conflict-affected states 17 February 2021 — 3:00PM TO 4:00PM Anonymous (not verified) 8 February 2021 Online

 This event explores lessons and opportunities from conflict-affected states.

In the field of peacebuilding, scholars and policymakers increasingly recognize the importance of environmental restoration, afforestation and infrastructural renewal for creating the sustainable livelihoods necessary for successful peacebuilding efforts.

Featuring academics writing for International Affairs on environmental peacebuilding in Colombia, Yemen and the Sahel, this webinar discusses the policy implications of the turn to environmental peacebuilding.

This event is part of the Chatham House’s Environment and Society Discussion Series in which the Energy Environment and Resources Programme brings together leading academics and policymakers to discuss key issues in environmental policy.

In particular, this event focuses on the role of environmental peacebuilding in creating sustainable livelihoods. From the impact the destruction of infrastructure can have on poverty as a driver of conflict, to the role environmental peacebuilding can play in bringing communities together by creating sustainable shared spaces of employment, the importance of the environmental livelihood creation is difficult to overstate.

Panellists focus on how policymakers can best encourage inclusive and sustainable livelihood creation and on addressing the key challenges such approaches face in the context of environmental peacebuilding efforts.




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Climate action and gender equality: Can we close the gap on one without the other?

Climate action and gender equality: Can we close the gap on one without the other? 8 March 2021 — 2:30PM TO 4:00PM Anonymous (not verified) 15 February 2021 Online

In partnership with the COP26 presidency, policymakers and experts examine the interrelationship between gender equality and climate action, and highlight innovative examples of policy and practice from around the world.

Marking International Women’s Day, this event organized by the COP26 presidency in partnership with Chatham House, will explore how gender equality and climate action go hand-in-hand. The agreement of the Gender Action Plan (GAP) at COP25 sent the message that the time for gender-responsive climate action is now.

This will be a unique opportunity to hear from policymakers and civil society leaders discussing whether enough is being done, as well as highlighting cutting-edge work around the world and suggesting what the future could hold.

The event will be livestreamed on this event page.




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Sand: Monitoring and management for a sustainable future

Sand: Monitoring and management for a sustainable future 2 March 2021 — 1:00PM TO 2:00PM Anonymous (not verified) 18 February 2021 Online

In partnership with the Global Sand Observatory Initiative, this event outlines the sand challenge, what actions are currently underway to address it, and what else needs to be done.

Please complete your registration on Zoom:

After water, sand is the raw material that the world consumes in the greatest quantity. It is no exaggeration to say that fine sand and coarser materials – the medium-to-coarse-grained pebbles, gravel and rock fragments used in construction – are the building blocks of the modern world.

When bound with cement, sand becomes concrete; when mixed with bitumen, it becomes asphalt; and when heated, it becomes glass. Without sand, we would have no highways, high-rises or high-speed trains. Yet sand – which is used here as shorthand for sand, gravel and crushed rock together – is a resource that is both abundant and finite.

In global terms, it is abundant, especially when compared with many other raw materials, albeit often not available close to where it is needed. It is finite in that the rate at which we are using it far exceeds the natural rate at which it is being replenished by the weathering of rocks by wind and water.

Industrialization, population growth and urbanization have fuelled explosive growth in the demand for sand. Precise data on sand extraction are hard to come by and the lack of data compounds the challenge of managing the resource sustainably.

However, the UN estimates that overall extraction could be in the region of 40 billion tonnes per year, driven primarily by construction sector demand. That equates to 18 kilograms of sand each day for every person on the planet and signals how strategically important these resources are for future sustainable development. Post-COVID-19 recovery investment in infrastructure, digital technologies, tourism and other economic activities are dependent on sand resources.

Current efforts to improve the management of sand resources at local, national and global levels are uneven. This is partly due to unique geological features and geography, but also differences in local manifestations of the ‘sand challenge’, national and regional demand for sand resources, as well as capacities to enforce or implement best practice assessment procedures, extractive practices, environmental management and restoration requirements.

We must put stronger conditions in place for a rapid, just and scaled transition to sustainable sand management. But where to focus our efforts for the greatest positive impact?




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Loss and damage: Where are we now and what happens next?

Loss and damage: Where are we now and what happens next? 25 January 2022 — 1:00PM TO 2:00PM Anonymous (not verified) 17 January 2022 Online

This event discusses the progress of the loss and damage agenda within climate negotiations. 

Loss and damage refers to harms and destruction caused by climate change impacts that cannot be avoided through mitigation or adaptation.

While it has gained increasing recognition in international climate change negotiations, turning the concept of loss and damage into tangible action for climate-vulnerable countries has been contentious.

Loss and damage is interwoven with issues of fairness and equity. The issue is highly disputed due to its connection with the historical responsibility of developed countries in causing climate change, as well as associated calls for compensation from developing countries.

At COP26, Scotland became the first government to pledge funds for loss and damage for countries in the Global South. However, most climate-vulnerable countries left disappointed by the failure of the Glasgow Climate Pact to secure the establishment of a dedicated loss and damage financing facility.

Developing countries have made it clear that they will continue to push for a new financing facility in the Glasgow Dialogue, a set of international discussions on loss and damage kicking off in June.

The Environment and Society Discussion Series is hosting two events on loss and damage ahead of that date. This first event outlines the key debates and discuss what progress has been made on advancing the loss and damage agenda within climate negotiations to date.

The second event focuses on solutions and possible ways forward, looking ahead to the COP27 negotiations in Egypt later in 2022, where loss and damage is expected to be a high-profile agenda item.




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Nuclear, gas and green finance taxonomies in the EU and UK

Nuclear, gas and green finance taxonomies in the EU and UK 23 February 2022 — 10:00AM TO 11:00AM Anonymous (not verified) 20 January 2022 Online

Experts discuss EU, UK, and international perspectives on green taxonomy.

This event will address the controversial additions to the EU green finance taxonomy, including the labelling of some nuclear and gas power sources as “green”. Hear perspectives from the UK, EU and international experts.

The UK has committed to creating a green taxonomy to provide a shared understanding of which economic activities count as sustainable. It should be robust and evidence-based, taking an objective and science-based approach to assessing sustainability.

Technical Screening Criteria (TSCs) for the climate change mitigation, and climate change adaptation objectives within the UK green taxonomy will be based on those in the EU Taxonomy. The Government is currently reviewing these and expects to consult on UK draft TSCs in the first quarter of 2022, ahead of legislating by the end of 2022.

In recent weeks the European Commission has proposed controversial additional TSCs for the EU taxonomy, most notably the inclusion of nuclear and natural gas in power generation, which are currently being discussed by Member States and the European Parliament.

The inclusion of controversial power sources not only risks affecting investment and deployment patterns in the net-zero transition, but may also be a threat to the authority of the taxonomy as a whole

Key questions for the UK now include whether and how to address these issues in its own taxonomy, and how to promote a science-based ‘race to the top’ between jurisdictions that can lead to robust international standards.

This Environment and Society Discussion Series event brings expert voices together to discuss EU, UK, and international perspectives, and is co-organized with E3G.




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The Ukraine war and threats to food and energy security

The Ukraine war and threats to food and energy security 13 April 2022 — 12:00PM TO 1:00PM Anonymous (not verified) 6 April 2022 Online

What are the potential impacts on food and energy markets emerging from the situation in Ukraine?

Russia and Ukraine are key players in global energy, food, fertilizer and mineral markets. In the first few days after Russia’s invasion, both the threat and reality of resource flows being reduced drove up global prices, and has impacted the day-to-day life of people and businesses around the world.

Developing and nutrition-fragile countries across Africa and the Middle East will be hit the hardest – Somalia, for example, is reliant on Russia and Ukraine for 100 per cent of its wheat imports and is currently experiencing its worst drought in years.

The potential scale of disruption to food and energy markets increases with every week the war continues. This event launches the Environment and Society programme’s latest briefing paper The Ukraine war and threats to food and energy security: Cascading risks from rising prices and supply disruptions.

The panel discusses:

  • The political, socio-economic and resource pressures already faced by the international community prior to Russia’s invasion of Ukraine.
  • Direct and cascading impacts on the complex and interconnected energy, minerals, food and fertilizer markets, and policy or market responses that may exacerbate these impacts.
  • Geopolitical ramifications that will affect the evolution of the conflict, as well as longer-term international cooperation and security.
  • Measures that governments can take to build resilience, both to the ongoing impacts of the situation in Ukraine and to future risks of market disruption and geopolitical upheaval.




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What happened at COP27?

What happened at COP27? 23 November 2022 — 12:00PM TO 1:00PM Anonymous (not verified) 14 November 2022 Online

Is the world getting back on track for staying within a 1.5°C temperature rise?

The COP27 summit closes out another year marked by record-breaking floods, deadly heatwaves and other extreme weather events, on top of global energy and food shortages and a cost-of-living crisis.

Remarkable geopolitical shifts including Russia’s invasion of Ukraine have weakened commitments to climate goals and led many to worry that governments are backtracking on their climate pledges.

UN officials have urged countries to show up to COP27 with greater ambition but instead of new pledges, the focus is expected to be on whether countries are following through on commitments made at COP26.

This event explored whether COP27 has met the challenge of truly moving the needle, and whether the world is getting back on track for staying within the 1.5°C temperature rise, or for loss and damage and climate justice.

Our expert panel discusses the summit’s overall success and impact on delivering in key areas: climate finance, mitigation, adaptation, loss and damage, nature and biodiversity and the just transition.

This event is part of the Waddesdon Club Webinar Series. The Waddesdon Club is a Chatham House initiative to encourage climate leadership in financial and economic policymaking. Since 2016, it has proved a highly successful forum for convening senior policymakers and leading climate scientists with future leaders in finance ministries, central banks and other public sector economic and financial organizations from around the world.

The initiative is supported by Ikea Foundation, KR Foundation and the Rothschild Foundation.




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Twenty Years After Hong Kong Handover, Does ‘One Country, Two Systems’ Still Work?

Twenty Years After Hong Kong Handover, Does ‘One Country, Two Systems’ Still Work? Expert comment sysadmin 28 June 2017

This unique constitutional framework can endure – if Hong Kong society can reconcile its different visions of the future.

Golden Bauhinia Square prepares for the anniversary commemorations. Photo: Getty Images.

Twenty years after the handover of Hong Kong from British to Chinese sovereignty, the ‘one country, two systems’ arrangement – the main aim of which was to guarantee the continuity of Hong Kong’s open society and way of life – can be said to have worked well. Street protests remain a regular feature of Hong Kong’s political culture. Freedom of information and expression are alive and well. Hong Kong retains its ‘capitalist way of life’, its legal system based on common law and independent judiciary, and its status as an international financial centre. As a result the city remains one of the most open economies across Asia, with robust institutions and transparency which are hard to find anywhere else in the region.

Yet the 79-day ‘occupy’ protests of autumn 2014 showed that something is not quite right in the city of Hong Kong.

The protests themselves had a number of causes. Partly they reflected socioeconomic concerns, especially the rise in income inequality and lack of affordable housing. These might have been dealt with to some extent by better governance over the years, but they are also a feature of many societies in the current phase of globalization – a case, perhaps, of too much ‘capitalist way of life’.

Politically, the desire expressed by many in 2014 was for a form of ‘genuine universal suffrage’ for the selection of Hong Kong’s chief executive which went beyond a provision of Hong Kong’s mini constitution, the Basic Law, that candidates should be put forward by a ‘nominating committee’. It was on this point that the possibility of constitutional reform foundered in 2015, leaving Hong Kong no further ahead in its ‘gradual progress’ towards democracy.

But this episode also brought to the surface the tension between different visions for Hong Kong’s future. In particular, many in Hong Kong are still uncomfortable with the ‘one country’ part of the deal, rejected by some (especially young people) in the ways that they conceptualize Hong Kong identity – according to one recent survey, as little as 3.1% of Hong Kong youths identify themselves as ‘Chinese’. These issues are likely to constrain political development for some time to come.

At their sharpest, some of these visions are for some form of self-determination, or even independence, for Hong Kong. This is not just anathema to the national authorities in Beijing, but contradicts a basic tenet of Hong Kong’s handover in 1997, the return to Chinese sovereignty. This is not just something on which Beijing will never compromise, but will seek to challenge.

It is this which explains the sense in Hong Kong that the central government has been looking to become politically more involved since 2014. But the challenge of influencing Hong Kong society is great, and other than strengthening relations with the establishment camp, Beijing has not been able to tighten its grip. If anything, the centre of gravity of Hong Kong politics has continued to drift away from Beijing, not towards it.

How this will play out remains to be seen. Some amelioration of social tensions could help. But the fundamental divergence in visions of Hong Kong’s future will not be resolved so easily.

Looking forward therefore, the key to the continued success of ‘one country, two systems’ lies in Hong Kong society. If mainstream acceptance of the compromises involved can return, then this unique constitutional framework can still work for years to come.




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Artificial Intelligence Apps Risk Entrenching India’s Socio-economic Inequities

Artificial Intelligence Apps Risk Entrenching India’s Socio-economic Inequities Expert comment sysadmin 14 March 2018

Artificial intelligence applications will not be a panacea for addressing India’s grand challenges. Data bias and unequal access to technology gains will entrench existing socio-economic fissures.

Participants at an AI event in Bangalore. Photo: Getty Images.

Artificial intelligence (AI) is high on the Indian government’s agenda. Some days ago, Prime Minister Narendra Modi inaugurated the Wadhwani Institute for Artificial Intelligence, reportedly India’s first research institute focused on AI solutions for social good. In the same week, Niti Aayog CEO Amitabh Kant argued that AI could potentially add $957 billion to the economy and outlined ways in which AI could be a ‘game changer’.

During his budget speech, Finance Minister Arun Jaitley announced that Niti Aayog would spearhead a national programme on AI; with the near doubling of the Digital India budget, the IT ministry also announced the setting up of four committees for AI-related research. An industrial policy for AI is also in the pipeline, expected to provide incentives to businesses for creating a globally competitive Indian AI industry.

Narratives on the emerging digital economy often suffer from technological determinism — assuming that the march of technological transformation has an inner logic, independent of social choice and capable of automatically delivering positive social change. However, technological trajectories can and must be steered by social choice and aligned with societal objectives. Modi’s address hit all the right notes, as he argued that the ‘road ahead for AI depends on and will be driven by human intentions’. Emphasising the need to direct AI technologies towards solutions for the poor, he called upon students and teachers to identify ‘the grand challenges facing India’ – to ‘Make AI in India and for India’.

To do so, will undoubtedly require substantial investments in R&D, digital infrastructure and education and re-skilling. But, two other critical issues must be simultaneously addressed: data bias and access to technology gains.

While computers have been mimicking human intelligence for some decades now, a massive increase in computational power and the quantity of available data are enabling a process of ‘machine learning.’ Instead of coding software with specific instructions to accomplish a set task, machine learning involves training an algorithm on large quantities of data to enable it to self-learn; refining and improving its results through multiple iterations of the same task. The quality of data sets used to train machines is thus a critical concern in building AI applications.

Much recent research shows that applications based on machine learning reflect existing social biases and prejudice. Such bias can occur if the data set the algorithm is trained on is unrepresentative of the reality it seeks to represent. If for example, a system is trained on photos of people that are predominantly white, it will have a harder time recognizing non-white people. This is what led a recent Google application to tag black people as gorillas.

Alternatively, bias can also occur if the data set itself reflects existing discriminatory or exclusionary practices. A recent study by ProPublica found for example that software that was being used to assess the risk of recidivism in criminals in the United States was twice as likely to mistakenly flag black defendants as being at higher risk of committing future crimes.

The impact of such data bias can be seriously damaging in India, particularly at a time of growing social fragmentation. It can contribute to the entrenchment of social bias and discriminatory practices, while rendering both invisible and pervasive the processes through which discrimination occurs. Women are 34 per cent less likely to own a mobile phone than men – manifested in only 14 per cent of women in rural India owning a mobile phone, while only 30 per cent of India’s internet users are women.

Women’s participation in the labour force, currently at around 27 per cent, is also declining, and is one of the lowest in South Asia. Data sets used for machine learning are thus likely to have a marked gender bias. The same observations are likely to hold true for other marginalized groups as well.

Accorded to a 2014 report, Muslims, Dalits and tribals make up 53 per cent of all prisoners in India; National Crime Records Bureau data from 2016 shows in some states, the percentage of Muslims in the incarcerated population was almost three times the percentage of Muslims in the overall population. If AI applications for law and order are built on this data, it is not unlikely that it will be prejudiced against these groups.

(It is worth pointing out that the recently set-up national AI task force is comprised of mostly Hindu men – only two women are on the task force, and no Muslims or Christians. A recent article in the New York Times talked about AI’s ‘white guy problem’; will India suffer from a ‘Hindu male bias’?)

Yet, improving the quality, or diversity, of data sets may not be able to solve the problem. The processes of machine learning and reasoning involve a quagmire of mathematical functions, variables and permutations, the logic of which are not readily traceable or predictable. The dazzle of AI-enabled efficiency gains must not blind us to the fact that while AI systems are being integrated into key socio-economic systems, their accuracy and logic of reasoning have not been fully understood or studied.

The other big challenge stems from the distribution of AI-led technology gains. Even if estimates of AI contribution to GDP are correct, the adoption of these technologies is likely to be in niches within the organized sector. These industries are likely to be capital- rather than labour-intensive, and thus unlikely to contribute to large-scale job creation.

At the same time, AI applications can most readily replace low- to medium-skilled jobs within the organized sector. This is already being witnessed in the outsourcing sector – where basic call and chat tasks are now automated. Re-skilling will be important, but it is unlikely that those who lose their jobs will also be those who are being re-skilled – the long arch of technological change and societal adaptation is longer than that of people’s lives. The contractualization of work, already on the rise, is likely to further increase as large industries prefer to have a flexible workforce to adapt to technological change. A shift from formal employment to contractual work can imply a loss of access to formal social protection mechanisms, increasing the precariousness of work for workers.

The adoption of AI technologies is also unlikely in the short- to medium-term in the unorganized sector, which engages more than 80 per cent of India’s labor force. The cost of developing and deploying AI applications, particularly in relation to the cost of labour, will inhibit adoption. Moreover, most enterprises within the unorganized sector still have limited access to basic, older technologies – two-thirds of the workforce are employed in enterprises without electricity. Eco-system upgrades will be important but incremental. Given the high costs of developing AI-based applications, most start-ups are unlikely to be working towards creating bottom-of-the-pyramid solutions.

Access to AI-led technology gains is thus likely to be heavily differentiated – a few high-growth industries can be expected, but these will not necessarily result in the welfare of labour. Studies show that labour share of national income, especially routine labour, has been declining steadily across developing countries.

We should be clear that new technological applications themselves are not going to transform or disrupt this trend – rather, without adequate policy steering, these trends will be exacerbated.

Policy debates about AI applications in India need to take these two issues seriously. AI applications will not be a panacea for addressing ‘India’s grand challenges’. Data bias and unequal access to technology gains will entrench existing socio-economic fissures, even making them technologically binding.

In addition to developing AI applications and creating a skilled workforce, the government needs to prioritize research that examines the complex social, ethical and governance challenges associated with the spread of AI-driven technologies. Blind technological optimism might entrench rather than alleviate the grand Indian challenge of inequity and growth.

This article was originally published in the Indian Express.




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Gender and equality

Gender and equality

Exploring empowerment in areas such as women’s rights, equality and discrimination, the sharing of unpaid work, and the role of gender in achieving the SDGs.

nfaulds-adams… 16 January 2020

Many women are still excluded from economic decision-making within their own household, receive lower salaries than men, and work longer hours. They are also often excluded from the labour market, do not have access to finance, and are denied property rights.

Wider areas of interest include examining the potential for foreign policies that prioritize gender equality, the physical, cultural and practical challenges to integrating women into close combat roles in the military, and the future of women in peace and security.


Equality and diversity research work also examines why people from black and minority ethnic groups still do less well in terms of education and the jobs they do than people from other groups, and considers the rights of workers across the world. It is strongly linked with promoting human rights and freedoms, based on principles such as dignity and respect.




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Bangladesh: The Trade-Off Between Economic Prosperity and Human Rights

Bangladesh: The Trade-Off Between Economic Prosperity and Human Rights 11 March 2020 — 1:00PM TO 2:00PM Anonymous (not verified) 28 February 2020 Chatham House | 10 St James's Square | London | SW1Y 4LE

Bangladesh’s recent gains in economic and social indices, set against its record of corruption and poor civil rights, has at times been termed the ‘Bangladesh Paradox’. Yet this label is overly simplistic; the current situation proves that these trends can coexist.

The Awami League government, in power since 2009, has increased political stability, delivered unprecedented economic and social advances, and adopted a counter-terrorism strategy to stamp out extremist groups. At the same time, it is criticized for curbing civil rights and failing to hold credible elections. However, as the two previous regimes have demonstrated, the rights situation is unlikely to improve even if the Awami League were replaced.

How did worsening rights become a feature of the state irrespective of its political dispensation? An unresolved contest between political and non-political state actors may hold the key to that puzzle. The perils of the current dispensation have recently manifested in weakening economic indicators, which jeopardize the very stability and social progress for which the country has garnered much praise.




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Webinar: Hong Kong: Dissent in the Age of Coronavirus

Webinar: Hong Kong: Dissent in the Age of Coronavirus 17 April 2020 — 12:00PM TO 1:00PM Anonymous (not verified) 8 April 2020

Street protests demanding greater autonomy and democratization in Hong Kong upended the city for seven months last year. However, with the outbreak of the coronavirus in China in late January, the protests quickly died out. What does this mean for the city’s protest movement?

The speaker will argue that, despite the lack of high-profile street rallies, protest in the city is continuing. It is building on and evolving from last year’s protest movement albeit in different forms. At the same time, the Hong Kong authorities, emboldened by a hard line from Beijing, have begun cracking down on activists and protesters in the city as they seek to put a lid on dissent ahead of important Legislative Council elections scheduled for this September.

In this webinar, the speaker will look at the current state of dissent in Hong Kong and prospects for Hong Kong’s future.

This event will be held on the record.




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Rational group algebras of generalized strongly monomial groups: Primitive idempotents and units

Gurmeet K. Bakshi, Jyoti Garg and Gabriela Olteanu
Math. Comp. 93 (), 3027-3058.
Abstract, references and article information




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Explicit calculations for Sono’s multidimensional sieve of ????₂-numbers

Daniel A. Goldston, Apoorva Panidapu and Jordan Schettler
Math. Comp. 93 (), 2943-2958.
Abstract, references and article information






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Identifying the source term in the potential equation with weighted sparsity regularization

Ole Løseth Elvetun and Bjørn Fredrik Nielsen
Math. Comp. 93 (), 2811-2836.
Abstract, references and article information




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From geodesic extrapolation to a variational BDF2 scheme for Wasserstein gradient flows

Thomas O. Gallouët, Andrea Natale and Gabriele Todeschi
Math. Comp. 93 (), 2769-2810.
Abstract, references and article information






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High-order splitting finite element methods for the subdiffusion equation with limited smoothing property

Buyang Li, Zongze Yang and Zhi Zhou
Math. Comp. 93 (), 2557-2586.
Abstract, references and article information




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Cracking Open Black Boxes

Algorithms can be very useful, but lately, with so much data being created and shared, and with the increase in their use in critical areas such as hiring, credit, and health care, algorithms are under intense scrutiny about their fairness. People experience the effects of an algorithm's conclusion, but the data and steps that form the basis for that conclusion are frequently hidden from them (as if inside a black box). Cathy O'Neil talks about the unfairness of most predictive algorithms.




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Making Room for Patients

We've seen that the availability of hospital beds is important during a pandemic, and it's important during normal times as well. Whether it's for emergency medical help or for a scheduled procedure (for example, chemotherapy), access to hospital space, staff, and equipment can be a matter of life and death. Mathematics helps medical center staff manage their resources more efficiently so that they are available when needed. An optimization technique called integer programming is used along with tools from statistics, probability, and machine learning to create better schedules for operating rooms, treatment centers, and the people who staff them. David Scheinker talks about the mathematics involved in hospital operations.




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Pinpointing How Genes Interact

Lorin Crawford explains how he uses math to analyze interactions between genes. Your DNA (the biological instruction manual in all of your cells) contains a mind-boggling amount of information represented in roughly 20,000 genes that encode proteins, plus a similar number of genes with other functions. As the cost of analyzing an individual's DNA has plummeted, it has become possible to search the entire human genome for genetic variants that are associated with traits such as height or susceptibility to certain diseases. Sometimes, one gene has a straightforward impact on the trait. But in many cases, the effect of one gene variant depends on which variants of other genes are present, a phenomenon called "epistasis." Studying such interactions involves huge datasets encompassing the DNA of hundreds of thousands of people. Mathematically, that requires time-intensive calculations with massive matrices and a good working knowledge of statistics.




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Natural Resources & Economic Development - 11/14/2024

Time: 10:00 AM, Location: E1.012 (Hearing Room)




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Recent Developments in Fractal Geometry and Dynamical Systems

Sangita Jha, Mrinal Kanti Roychowdhury and Saurabh Verma, editors. American Mathematical Society, 2024, CONM, volume 797, approx. 268 pp. ISBN: 978-1-4704-7216-0 (print), 978-1-4704-7610-6 (online).

This volume contains the proceedings of the virtual AMS Special Session on Fractal Geometry and Dynamical Systems, held from May 14–15,...




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Amitsur Centennial Symposium

Avinoam Mann, Louis H. Rowen, David J. Saltman, Aner Shalev, Lance W. Small and Uzi Vishne, editors. American Mathematical Society | Bar-Ilan University, 2024, CONM, volume 800, approx. 320 pp. ISBN: 978-1-4704-7555-0 (print), 978-1-4704-7613-7 (online).

This volume contains the proceedings of the Amitsur Centennial Symposium, held from November 1–4, 2021, virtually and at the Israel Institute for...




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Recent Progress in Function Theory and Operator Theory

Alberto A. Condori, Elodie Pozzi, William T. Ross and Alan A. Sola, editors. American Mathematical Society, 2024, CONM, volume 799, approx. 224 pp. ISBN: 978-1-4704-7246-7 (print), 978-1-4704-7612-0 (online).

This volume contains the proceedings of the AMS Special Session on Recent Progress in Function Theory and Operator Theory, held virtually on April 6,...