Articles by Tim Li
Exploring generalizability and explainability of LLMs in classifying clinically rated suicidal ideation using heterogeneous data
Abstract While artificial intelligence (AI) and large language models (LLMs) have shown promise in identifying and classifying suicidal ideation, their generalizability and equity in the presence of heterogeneous clinical data remain largely unexplored.
Multimodal AI for predicting comorbid REM sleep behavior disorder in major depressive disorder
Abstract REM sleep behavior disorder (RBD) is a robust prodromal marker of α-synucleinopathies: idiopathic RBD carries a 10–15-year phenoconversion risk of 80–90% to Parkinson’s disease (PD) and related disorders. In major depressive disorder (MDD), comorbid RBD marks a subgroup at elevated prodromal PD risk, yet is frequently missed in psychiatric practice. Here, we developed a multimodal AI framework to detect comorbid RBD in MDD.
Capturing omega sign in the clinical assessment of depression by deep learning
Abstract The omega sign is a melancholic facial expression, resembling the Greek letter omega “Ω”. To study static omega sign (visible full-blown Ω-shaped or vertical wrinkles at rest) and dynamic omega sign (newly appearing or deepening) with digital assessment for depression via deep learning, subjects with major depressive disorder (MDD) and controls were invited to take neutral photos and videotaped interviews to study the static and dynamic omega sign, respectively.
Food insecurity is worse and the budget offers no solutions
The Carney government says its November budget empowers and invests in Canadians. But it lacks meaningful measures to reduce food insecurity – an important indicator of economic well-being and a strong predictor of poor physical health. It is therefore out of touch with the financial struggles that millions of Canadians face.
Meridional shift of climatological tropical cyclone genesis location in the western North Pacific
1 INTRODUCTION Tropical cyclone (TC) genesis is a process through which cumulus convective towers are organized into a larger-scale cyclonic vortex with a warm core (Ge et al., 2013; Gray, 1998). Around the world ocean, the western North Pacific (WNP) is the most active basin in which about 30% of global TCs form each year (Gray, 1968; Li & Hsu, 2017; Ma & Li, 2022; Schreck et al., 2014).
Understanding the Factors Controlling MJO Prediction Skill across Events
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National school food program won’t solve food insecurity for families. Here’s what can.
(Version française disponible ici) The 2024 federal budget announcement of $1 billion over five years to establish a national school food program fulfils the Liberal Party’s 2021 election commitments and answers the many calls for Ottawa to support school breakfasts and lunches. However, the budget lacked any action on the Canada child benefit (CCB) – the policy best positioned to move the needle on food insecurity among families with children.
Tim Li
Tim Li is the research program co-ordinator of PROOF, a program studying effective policy interventions for household food insecurity in Canada at the University of Toronto.
Improvement in Forecasting Short-Term Tropical Cyclone Intensity Change and Their Rapid Intensification Using Deep Learning
Keywords: Short-range prediction; Statistical forecasting; Deep learning; Tropical cyclones; Model interpretation and visualization; Pattern recognition 1. Introduction Tropical cyclones (TCs) can cause severe socioeconomic damage to coastal areas worldwide. According to the World Meteorological Organization, 1942 TCs have occurred over the past 50 years, killing 779 324 people and causing economic losses of over U.S. $1.4 trillion.
Ascend Consultancy Weekly Team Perspective: Advanced Air Mobility - Snapshot April 2024
fleets analyzer Ascend Consultancy Expert view Cirium Fleets Analyzer logged slightly below 450 new order commitments for the Advanced Air Mobility (AAM) sector since the beginning of this year. READ ALL OF THE LATEST UPDATES FROM ASCEND CONSULTANCY EXPERTS WHO DELIVER POWERFUL ANALYSIS, COMMENTARIES AND PROJECTIONS TO AIRLINES, AIRCRAFT BUILD AND MAINTENANCE COMPANIES, FINANCIAL INSTITUTIONS, INSURERS AND NON-BANKING FINANCIERS. MEET THE ASCEND CONSULTANCY TEAM.
Improvement in forecasting short-term tropical cyclone intensity change and their rapid intensification using deep learning
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Researchers: Food insecurity in Canada is the worst it's ever been-here's how we can solve it
According to the latest Statistics Canada data, household food insecurity in the ten provinces has reached a record high. Drawing on data from StatCan's Canadian Income Survey, our new report has found that the percentage of households with inadequate or insecure access to food due to financial constraints rose to 17.8 percent in 2022 from 15.9 percent in 2021.
Food insecurity in Canada is the worst it's ever been — here's how we can solve it
According to the latest Statistics Canada data, household food insecurity in the 10 provinces has reached a record high. Drawing on data from StatCan’s Canadian Income Survey, our new report has found that the percentage of households with inadequate or insecure access to food due to financial constraints rose to 17.8 per cent in 2022 from 15.9 per cent in 2021.
Unraveling the Formation Mechanism of Exceptionally Strong Marine Heatwaves in the Northeast Pacific in 2020
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Unraveling the formation mechanism of exceptionally strong marine heatwave in the Northeast Pacific in 2020
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Hourglass‐like constrictions on MRI are common in electromyography‐confirmed cases of neuralgic amyotrophy (Parsonage-Turner syndrome): A tertiary referral center experience - Sneag - Muscle & Nerve - Wiley Online Library
DATA AVAILABILITY STATEMENT The data that support the findings of this study are available from the corresponding author upon reasonable request.
Les prescriptions alimentaires : une réponse à courte vue à l’insécurité alimentaire
Tim Li est le coordonnateur de PROOF, un programme de recherche qui étudie les interventions politiques efficaces pour lutter contre l’insécurité alimentaire au Canada, à l’Université de Toronto. Vivre dans un ménage qui a du mal à se procurer de la nourriture est toxique pour la santé. Plus l’insécurité alimentaire est grave, plus le risque d’un large éventail d’effets néfastes sur la santé, y compris un décès prématuré, augmente.
Moist baroclinic instability of mid-high-latitude intraseasonal oscillations
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Ascend Consultancy Weekly Team Perspective: AAM Snapshot July 2023 - international events become occasions for showcasing aircraft, routes and orders
READ ALL OF THE LATEST UPDATES FROM ASCEND CONSULTANCY EXPERTS WHO DELIVER POWERFUL ANALYSIS, COMMENTARIES AND PROJECTIONS TO AIRLINES, AIRCRAFT BUILD AND MAINTENANCE COMPANIES, FINANCIAL INSTITUTIONS, INSURERS AND NON-BANKING FINANCIERS. MEET THE ASCEND CONSULTANCY TEAM. By Tim Chun-Hing Li, Aviation analyst at Cirium Ascend Consultancy Cirium launched its Advanced Air Mobility and Electric Aircraft Sector Datasets in April last year.
Comment: Food charity will not fix food insecurity
Just two days after the release of the latest statistics on household food insecurity in Canada, Agriculture and Agri-Food Minister Marie-Claude Bibeau announced a new phase of the Local Food Infrastructure Fund. Launched in 2019 as part of Canada’s food policy, this program funds infrastructure and equipment for local food charity programs and is the only federal program naming food insecurity reduction as part of its goal. This approach to addressing food insecurity is deeply misguided.
Canada’s national food policy is at risk of enshrining a two-tiered food system Original
Just two days after the release of the latest statistics on household food insecurity in Canada, Agriculture and Agri-Food Minister Marie-Claude Bibeau announced the start of a new phase of the Local Food Infrastructure Fund. Launched in 2019 as part of Canada’s Food Policy, this program funds infrastructure and equipment for local food charity programs and is the only federal program naming food insecurity reduction as part of its goal.
Influence of boreal summer intraseasonal oscillation on summer precipitation in North China
To understand the impact of the boreal summer intraseasonal oscillation (BSISO) propagation on summer precipitation in North China, this study analysed the quantitative relationship between the BSISO and summer precipitation in North China and its influence mechanism using summer precipitation data from 1981 to 2020, the NCEP/NCAR reanalysis data and the NOAA outgoing longwave radiation (OLR).
Food prescriptions – a short-sighted response to food insecurity - Healthy Debate
Living in a household struggling to afford food is toxic for people’s health. As the severity of food insecurity increases, so does the risk of a wide range of adverse health outcomes, including premature death. The toll on physical and mental health manifests in greater need for health-care services. Food-prescription programs are one way that health-care providers are trying to mitigate the health-eroding hardships they witness.
Roles of dynamic and thermodynamic processes in regulating the decay paces of El Niño events
Abstract Most El Niño events decay after a peak in boreal winter, but some persist and strengthen again in the following year. Several mechanisms for regulating its decay pace have been proposed; however, their relative contributions have not been thoroughly examined yet.
Utility of Ultrasound-Guided Erector Spinae Plane Blocks
William D Zelenty,1,* Tim Y Li,2,* Ichiro Okano,1,3,* Alexander P Hughes,1 Andrew A Sama,1 Ellen M Soffin4,* 1Department of Orthopaedic Surgery, Spine Service, Hospital for Special Surgery, New York, NY, 10021, USA; 2Weill-Cornell Medical College, New York, NY, 10021, USA; 3Department of Orthopaedic Surgery, Spine Service, Showa University Hospital, Hatanodai, Tokyo, Japan; 4Department of Anesthesiology, Critical Care & Pain Management, Hospital for Special Surgery, New York,...
Ascend by Cirium Weekly Team Perspective: Un Très Bon Voyage en Chine?
READ ALL OF THE LATEST UPDATES FROM ASCEND BY CIRIUM EXPERTS WHO DELIVER POWERFUL ANALYSIS, COMMENTARIES AND PROJECTIONS TO AIRLINES, AIRCRAFT BUILD AND MAINTENANCE COMPANIES, FINANCIAL INSTITUTIONS, INSURERS AND NON-BANKING FINANCIERS. MEET THE ASCEND BY CIRIUM TEAM. By Tim Chun-hing Li, Aviation Analyst at Ascend by Cirium French President Emmanuel Macron has returned from his state visit to China last week.
What’s Behind the New Federal Grocery Rebate
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Federal budget 2023: Grocery rebate is the right direction on food insecurity, but there’s a long road ahead
With grocery prices at an all-time high, Canadians were paying close attention to the 2023 federal budget and what relief it might bring. The promise to address affordability materialized as a new “grocery rebate” that will provide money directly to low-income Canadians. This policy takes the right kind of approach to supporting food-insecure Canadians, but it doesn’t go far enough to address the large and longstanding problem of household food insecurity in this country.
Grocery rebate is the right direction on food insecurity, but there's a long road ahead
With grocery prices at an all-time high, Canadians were paying close attention to the 2023 federal budget and what relief it might bring. The promise to address affordability materialized as a new “grocery rebate” that will provide money directly to low-income Canadians. This policy takes the right kind of approach to supporting food-insecure Canadians, but it doesn’t go far enough to address the large and longstanding problem of household food insecurity in this country.
Incentives are key to breaking the cycle of cyberattacks on critical infrastructure
Interplay of incentives A marshmallow. That may be the secret to improving the cybersecurity of critical infrastructure. Many may know of the famous marshmallow experiment conducted by Walter Mischel at Stanford University where children were offered a marshmallow but promised two if they could resist eating the first one for a given period. But less well known are the follow-on experiments that looked at how cooperation and social pressure changed children’s behavior in the experiment.
Mechanisms Determining Diversity of ENSO-Driven Equatorial Precipitation Anomalies
Following Back and Bretherton (2009a), tropical vertical motions can be decomposed into two vertical modes: deep and shallow modes. Through this approach, the atmospheric boundary layer and free-troposphere processes can be isolated. The decomposition of tropical vertical motions includes following three steps. First, the two dominant modes are obtained by performing a principal component analysis (PCA) on the horizontal convergence profiles over tropical oceans (20°S–20°N) (Fig. 1a).
A decade of proof on how to tackle food insecurity in Canada
Subscribe Home Page News Opinion Foreign Policy Politics Policy Legislation Lobbying Hill Life & People Hill Climbers Heard On The Hill Calendar Election 2021 Archives Classifieds Hill Times Events Inside Ottawa Directory Hill Times Store Hill Times Careers The Wire Report The Lobby Monitor Parliament Now Reuse & Permissions Advertising FAQ Contact UsLog In a-decade-of-proof-on-how-to-tackle-food-insecurity-in-canadaAno By Tim Li December 28, 2021 It’s clear that this understanding of food...
To eliminate food insecurity, we must dismantle anti-Black racism
We’ve known for a while that Black households in Canada are more likely to experience inadequate or insecure access to food due to financial constraints, but little has been done to better understand this disparity. Collaborating with FoodShare, a leading food justice organization, we recently completed the first focused study on the racial disparities in food insecurity in Canada.
Divergent Responses of Summer Precipitation in China to 1.5°C Global Warming in Transient and Stabilized Scenarios
Research Article Zhihong Jiang, Corresponding Author zhjiang@nuist.edu.cn orcid.org/0000-0001-7864-2300 Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, 210044 China Key Laboratory of Meteorological Disaster of Ministry of Education, Collaborative Innovation Center on Forecast and Evaluation of Meteorological...
How trust, connection and understanding can shape the future of cyber
Share Written by Tim Li Aug 18, 2021 | CyberScoop Written by Tim Li Aug 18, 2021 | CYBERSCOOP Tim Li is a principal at Deloitte Risk & Financial Advisory and Deloitte Touche LLP and leads Deloitte’s Strategic Growth Cyber portfolio for federal, state and local governments and higher education institutions. Cybersecurity incidents continue to make headlines, challenging public agencies in the US to modernize cybersecurity defenses to protect citizens and the country.
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