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Articles 1 - 11 of 11
Full-Text Articles in Physical Sciences and Mathematics
Optimal Control For Transboundary Pollution Under Ecological Compensation: A Stochastic Differential Game Approach, Ke Jiang, Ryan Knowles Merrill, Daming You, Pan Pan
Optimal Control For Transboundary Pollution Under Ecological Compensation: A Stochastic Differential Game Approach, Ke Jiang, Ryan Knowles Merrill, Daming You, Pan Pan
Research Collection Lee Kong Chian School Of Business
To account for previously ignored, yet widely observed uncertainty in nature's capability to replenish the natural environment in ways that should inform ideal design of ecological compensation (EC) regimes, this study constructs a stochastic differential game (SDG) model to analyze transboundary pollution control options between a compensating and compensated region. Equilibrium strategies in the stochastic, two player game inform optimal control theory and reveal a welfare distribution mechanism to form the basis of an improved cooperative game contract. A case-based numerical example serves to verify the theoretical results and supports three key insights. First, accounting for various random disturbance factors, …
An Urban Ecohydrological Model To Quantify The Effect Of Vegetation On Urban Climate And Hydrology (Ut&C V1.0), Naika Meili, Gabriele Manoli, Paolo Burlando, Elie Bou-Zeid, Winston T. L. Chow, Andrew M. Coutts, Edoardo Daly, Kerry A. Nice, Matthias Roth, Nigel J. Tapper, Erik Velasco, Enrique R. Vivoni, Simone Fatichi
An Urban Ecohydrological Model To Quantify The Effect Of Vegetation On Urban Climate And Hydrology (Ut&C V1.0), Naika Meili, Gabriele Manoli, Paolo Burlando, Elie Bou-Zeid, Winston T. L. Chow, Andrew M. Coutts, Edoardo Daly, Kerry A. Nice, Matthias Roth, Nigel J. Tapper, Erik Velasco, Enrique R. Vivoni, Simone Fatichi
Research Collection School of Social Sciences
Increasing urbanization is likely to intensify the urban heat island effect, decrease outdoor thermal comfort and enhance runoff generation in cities. Urban green spaces are often proposed as a mitigation strategy to counteract these adverse effects and many recent developments of urban climate models focus on the inclusion of green and blue infrastructure to inform urban planning. However, many models still lack the ability to account for different plant types and oversimplify the interactions between the built environment, vegetation, and hydrology. In this study, we present an urban ecohydrological model, Urban Tethys-Chloris (UT&C), that combines principles of ecosystem modelling with …
The Spirulina Strategy, Singapore Management University
The Spirulina Strategy, Singapore Management University
Perspectives@SMU
This is an adapted version of the SMU Case, “Navigating an Eternal Ocean: EnerGaia’s Emergent Strategy in the Market for Spirulina" written by Research Fellow Ryan Merrill and Assistant Professor Simon Schillebeeckx. To see the full case, please click on the following link: https://cmp.smu.edu.sg/case/3986
EnerGaia began life trying to address nutrition issues in the developing world. The prospect of profit is testing its founder to balance both or choose one over the other
Commentary: How Effectively Can Singapore Adapt To Sea Level Rise?, Winston T. L. Chow
Commentary: How Effectively Can Singapore Adapt To Sea Level Rise?, Winston T. L. Chow
Research Collection School of Social Sciences
Even as Singapore strives to adapt to rising sea levels, let’s not win that battle yet end up losing the larger war against climate change, says the Singapore Management University’s Winston Chow.
How ‘Hot’ Is Too Hot? Evaluating Acceptable Outdoor Thermal Comfort Ranges In An Equatorial Urban Park, Su Li Heng, Winston T. L. Chow
How ‘Hot’ Is Too Hot? Evaluating Acceptable Outdoor Thermal Comfort Ranges In An Equatorial Urban Park, Su Li Heng, Winston T. L. Chow
Research Collection School of Social Sciences
Urban green spaces offer vital ecosystem services such as regulating elevated temperatures in cities. Less information exists, however, on how urban green spaces influence outdoor thermal comfort (OTC), which is dependent on people’s perceptions of the complex interactions amongst ambient humidity, wind and both air and radiant temperatures. In this study, we analysed an existing OTC dataset compiled within a large Singapore urban park and calibrated OTC thresholds for physiological equivalent temperatures (PET) by analysing PET against thermal perception survey responses from the park visitors (n = 1508). We examined OTC according to (i) neutral, (ii) acceptable and (iii) preferred …
Managing Wind-Based Electricity Generation In The Presence Of Storage And Transmission Capacity, Yangfang (Helen) Zhou, Alan Scheller-Wolf, Nicola Secomandi, Stephen Smith
Managing Wind-Based Electricity Generation In The Presence Of Storage And Transmission Capacity, Yangfang (Helen) Zhou, Alan Scheller-Wolf, Nicola Secomandi, Stephen Smith
Research Collection Lee Kong Chian School Of Business
We investigate the management of a merchant wind energy farm co‐located with a grid‐level storage facility and connected to a market through a transmission line. We formulate this problem as a Markov decision process (MDP) with stochastic wind speed and electricity prices. Consistent with most deregulated electricity markets, our model allows these prices to be negative. As this feature makes it difficult to characterize any optimal policy of our MDP, we show the optimality of a stage‐ and partial‐state‐dependent‐threshold policy when prices can only be positive. We extend this structure when prices can also be negative to develop heuristic one …
The Uk Summer Heatwave Of 2018 And Public Concern Over Energy Security, Shaun Larcom, Po-Wen She, Terry Van Gevelt
The Uk Summer Heatwave Of 2018 And Public Concern Over Energy Security, Shaun Larcom, Po-Wen She, Terry Van Gevelt
Research Collection College of Integrative Studies
The UK summer heatwave of 2018 led to changes in consumer behaviour, including large increases in electricity demand due to increased use and intensity of refrigeration and air-conditioning devices1,2. Although the United Kingdom experienced its equal hottest summer on record, the extreme temperatures were concentrated in the south and east of England3. Here we exploit the regional variation to test for the effect of experiencing extreme temperatures on perceptions of resource security and on related pro-environmental behaviour. We analyse data from 2,189 individuals across the UK over a 7 day period and use a difference-in-differences estimation to compare responses of …
Implementation Of A Multi-Agent Environmental Regulation Strategy Under Chinese Fiscal Decentralization: An Evolutionary Game Theoretical Approach, Ke Jiang, Daming You, Ryan Knowles Merrill, Zhendong Li
Implementation Of A Multi-Agent Environmental Regulation Strategy Under Chinese Fiscal Decentralization: An Evolutionary Game Theoretical Approach, Ke Jiang, Daming You, Ryan Knowles Merrill, Zhendong Li
Research Collection Lee Kong Chian School Of Business
Evolutionary game theory (EGT) provides a powerful tool with which to unpack the interactive strategies of polluting enterprises (PEs), local government regulators (LG), and central government planners (CG) in China. Here, the prevailing institutional system of fiscal decentralization sees regulatory mandates set by the CG and enforced at the LG level. This delegation shapes managers' incentives when deciding the degree to which firms will incur costs to reduce pollution and comply with state directives. Manager's choice sets draw shape from decisions at the LG level, where regulators balance the pursuit of environmental quality with the economic payoffs of tacit collusion …
An Artificial Bee Colony-Based Hybrid Approach For Waste Collection Problem With Midway Disposal Pattern, Qu Wei, Zhaoxia Guo, Hoong Chuin Lau, Zhenggang He
An Artificial Bee Colony-Based Hybrid Approach For Waste Collection Problem With Midway Disposal Pattern, Qu Wei, Zhaoxia Guo, Hoong Chuin Lau, Zhenggang He
Research Collection School Of Computing and Information Systems
This paper investigates a waste collection problem with the consideration of midway disposal pattern. An artificial bee colony (ABC)-based hybrid approach is developed to handle this problem, in which the hybrid ABC algorithm is proposed to generate the better optimum-seeking performance while a heuristic procedure is proposed to select the disposal trip dynamically and calculate the carbon emissions in waste collection process. The effectiveness of the proposed approach is validated by numerical experiments. Experimental results show that the proposed hybrid approach can solve the investigated problem effectively. The proposed hybrid ABC algorithm exhibits a better optimum-seeking performance than four popular …
Building Mangroves With Trees, Singapore Management University
Building Mangroves With Trees, Singapore Management University
Perspectives@SMU
Arne Fjortoft stumbled into the world of fintech and cryptocurrencies while tackling global warming
Climate Risks And Market Efficiency, Harrison Hong, Frank Weikai Li, Jiangmin Xu
Climate Risks And Market Efficiency, Harrison Hong, Frank Weikai Li, Jiangmin Xu
Research Collection Lee Kong Chian School Of Business
Climate science finds that the trend towards higher global temperatures exacerbates the risks of droughts. We investigate whether the prices of food stocks efficiently discount these risks. Using data from thirty-one countries with publicly-traded food companies, we rank these countries each year based on their long-term trends toward droughts using the Palmer Drought Severity Index. A poor trend ranking for a country forecasts relatively poor profit growth for food companies in that country. It also forecasts relatively poor food stock returns in that country. This return predictability is consistent with food stock prices underreacting to climate change risks.