Results 41 to 50 of about 2,350 (166)

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

High Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li, Jiangling Zhi, Yu Wang, Hantao Tao, Zhaoming Li, Shanqiang Gu, Zhe Li, Zeyu Zhang, Lei Zhang, Guoying Tang   +9 more
wiley   +1 more source

Experimental Study of Cloud-to-Ground Lightning Nowcasting with Multisource Data Based on a Video Prediction Method

Remote Sensing, 2022
The evolution of lightning generation and extinction is a nonlinear and complex process, and the nowcasting results based on extrapolation and numerical models largely differ from the real situation.
Shuchang Guo, Jinyan Wang, Ruhui Gan, Zhida Yang, Yi Yang   +4 more
doaj   +1 more source

Band‐Pass Filtering With High‐Dimensional Time Series. A Synthetic Indicator of the Medium‐to‐Long Run Component of Growth

Journal of Time Series Analysis, EarlyView.
ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli, Marco Lippi, Tommaso Proietti   +2 more
wiley   +1 more source

The Accuracy Smoothness Dilemma in Prediction: A Novel Multivariate M‐SSA Forecast Approach

Journal of Time Series Analysis, EarlyView.
ABSTRACT Forecasting presents a complex estimation challenge, as it involves balancing multiple, often conflicting, priorities and objectives. Conventional forecast optimization methods typically emphasize a single metric, such as minimizing the mean squared error (MSE), which may neglect other crucial aspects of predictive performance. To address this
Marc Wildi
wiley   +1 more source

Nowcasting Swiss GDP Growth From Public Lead Texts: Simple Methods Are Sufficient

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT Public lead texts from Swiss newspapers contain most of the signal needed to nowcast Swiss GDP growth in real time. I build an indicator from daily topic‐specific sentiment and recession measures extracted from three Swiss newspapers and evaluate it in pseudo‐real time.
Marc Burri
wiley   +1 more source

Nowcasting Economic Activity Using Electricity Market Data: The Case of Lithuania

Economies, 2023
Traditional forecasting methods usually rely on historical macroeconomic indicators with significant delays. To address this problem, new opportunities for economic modeling and forecasting are emerging by using real-time data and making nowcasting of ...
Alina Stundziene, Vaida Pilinkiene, Jurgita Bruneckiene, Andrius Grybauskas, Mantas Lukauskas   +4 more
doaj   +1 more source

Leveraging High‐Frequency Digital Data to Analyze Forced Displacement Dynamics: A Case Study from the Gaza Strip

Population and Development Review, EarlyView.
Abstract The quantification and analysis of forced displacement, driven by political unrest or natural disasters, has become increasingly central to both humanitarian and demographic research. With displaced populations reaching record numbers, there is an urgent need for accurate and timely data on displacement patterns, particularly disaggregated by ...
Edith Darin, Ridhi Kashyap, Douglas R. Leasure   +2 more
wiley   +1 more source

Projecting Population Size and Structure in Conflict Settings for Humanitarian Response and Disaster Preparedness: Insights from Haiti, Mozambique, and Sudan

Population and Development Review, EarlyView.
Abstract Up‐to‐date subnational population estimates—disaggregated by age, sex, and to the lowest possible geographical level —are a key component of evidence‐based humanitarian action. In many humanitarian crises, however, large‐scale population mobility, combined with disruptions to national statistical systems, makes updating subnational population ...
Romesh Silva, Mallika Snyder
wiley   +1 more source

Altimeter Observation-Based Eddy Nowcasting Using an Improved Conv-LSTM Network

Remote Sensing, 2019
Eddies can be identified and tracked based on satellite altimeter data. However, few studies have focused on nowcasting the evolution of eddies using remote sensing data. In this paper, an improved Convolutional Long Short-Term Memory (Conv-LSTM) network
Chunyong Ma, Siqing Li, Anni Wang, Jie Yang, Ge Chen   +4 more
doaj   +1 more source

Early Warning Systems and Emergency Declarations During Brazil's Largest Dengue Outbreak

Tropical Medicine &International Health, EarlyView.
ABSTRACT Objectives Early warning systems (EWSs) are essential for alert, detection, and response to potential public health emergencies. Brazil's 2024 dengue epidemic, the largest ever recorded, offers a critical case for assessing correspondence between timely epidemic risk detection and health governance responsiveness.
Lorena Guadalupe Barberia, Alexandra Crispim Boing, Natália de Paula Moreira, Murilo Motta, Guilherme Pereira Ferreira, Dara Aparecida Vilela Pinto, Luiz Antonio Couto Soares, João de Oliveira Gusmão, Ana Paula Magalhães Brito, Sabrina Almeida, Tatiane C. Moraes de Sousa   +10 more
wiley   +1 more source