Results 81 to 90 of about 7,966 (257)

Thin‐film lithium niobate photonics: Frontiers in millimeter‐wave and terahertz generation and integrated applications

InfoScience, EarlyView.
With the advancement of 6G communications, high‐precision radar, and advanced imaging technologies, there is a growing demand for compact, high‐performance light sources capable of generating high‐frequency radio waves (millimeter‐wave and terahertz waves). This article systematically introduces how to efficiently generate these high‐frequency waves on
Jianfeng Xiong, Zhenyu Wang, Xu Li, Guo Tang, Sizhe Wang, Jiyuan Huang, Guochao Wang, Shuhua Yan, Wenzhao Sun   +8 more
wiley   +1 more source

Rainfall prediction for data-scarce areas using meteorological satellites in the case of the lake Tana sub-basin, Ethiopia

Journal of Water and Climate Change
In African nations with complex topographies, alternative rainfall estimation methods such as satellites are crucial. This study aimed at predicting the spatial and temporal distribution of rainfall in the lake Tana sub-basin from 1990 to 2020.
Shimalis Sishah Dagne, Zenebe Reta Roba, Mitiku Badasa Moisa, Kiros Tsegay Deribew, Dessalegn Obsi Gemeda, Hurgesa Hundera Hirpha   +5 more
doaj   +1 more source

Rapid frequency chirps of an Alfvén wave in a toroidal plasma [PDF]

, 2013
textResults from models that describe frequency chirps of toroidal Alfvén eigenmode excited by energetic particles are presented here. This structure forms in TAE gap and may or may not chirp into the continuum.
Wang, Ge, active 2013
core  

Improving CHIRPS Daily Satellite-Precipitation Products Using Coarser Ground Observations

, 2019
A clear bias exists in the widely used gridded precipitation products (GPPs) that result from factors about topography, climate, and retrieval algorithms.
Scaioni M., Cheng G., Li W., Li X., Yao D., He X., Chen Y., Sun W., Gao J.   +8 more
core   +1 more source

Reconstruction of Multi-user Binary Subspace Chirps

, 2020
We consider codebooks of Complex Grassmannian Lines consisting of Binary Subspace Chirps (BSSCs) in N =2m dimensions. BSSCs are generalizations of Binary Chirps (BCs), their entries are either fourth-roots of unity, or zero.
Olav Tirkkonen, Pllaha, Tefjol, Robert Calderbank, Tirkkonen, Olav, Calderbank, Robert, Tefjol Pllaha   +5 more
core   +1 more source

Satellite and Reanalysis Dataset Dependence of ETCCDI Extreme Precipitation Trends in Paraná, Southern Brazil

International Journal of Climatology, EarlyView.
Extreme precipitation trends detected in Paraná, Southern Brazil (1983–2024), are strongly conditioned by the dataset used, with reanalyses indicating coherent inland drying and longer dry spells, observations retaining stronger mesoscale heterogeneity, and satellite products often showing declines in short‐duration extremes. Monthly diagnostics reveal
Paulo Miguel de Bodas Terassi, Jakeline Baratto, Vitor Hugo Rosa Biffi   +2 more
wiley   +1 more source

Climatology of Tropical Cyclones Approaching Tanzania and Their Impacts on Rainfall in East Africa

International Journal of Climatology, EarlyView.
Tropical cyclones (TCs) that approach Tanzania bring heavy rainfall over northern Mozambique, Tanzania, and south‐central Kenya, but the occurrence of these TCs reduces precipitation over southern African countries. Easterly steering winds and the Mascarene High are key features directing TCs westward.
Michinori Ideyoshi, Youichi Kamae
wiley   +1 more source

Coherent Stokes Raman Scattering for Simultaneous Measurement of CO2 and CH4 Temperatures

Journal of Raman Spectroscopy, EarlyView.
A three‐beam hybrid fs/ps CSRS method is employed to excite the rovibrational transitions in the Fermi‐dyad of CO2$$ {}_2 $$ and the v2$$ {v}_2 $$ mode of CH4$$ {}_4 $$. Time‐domain spectroscopic models are developed to extract the fuel and flame temperature profiles from experimental CH4$$ {}_4 $$ and CO2$$ {}_2 $$ spectra in a diffusion flame ...
Alexander M. Warner, Robert P. Lucht, Rohan M. Gejji, Carson D. Slabaugh   +3 more
wiley   +1 more source

Analysis of CHIRPS and GPM-IMERG and Discharge Modeling with Transfer Function-GRU in Gembong Watershed, Pasuruan

Jurnal Teknik Pengairan
Rain gauges in Indonesia are often unevenly distributed, with significant gaps in data availability. As an alternative, satellite precipitation products (SPPE), such as CHIRPS and GPM-IMERG, are increasingly used for precipitation estimates. Additionally,
Setinda Eka Andriyani, Ery Suhartanto, Dian Sisinggih   +2 more
doaj   +1 more source

Spatially Heterogeneous and Nonlinear Responses of Ecosystem Service Value to Human Activity Intensity in an Arid Mountain–Oasis–Desert Urban Agglomeration

Land Degradation &Development, EarlyView.
ABSTRACT Rapid urbanization and agricultural expansion are reshaping human–environment relationships in arid regions; however, the spatially heterogeneous and nonlinear relationships between human activities and ecosystem services remain insufficiently understood.
Hui Zhao, Zhihao Wang, Yongchao Zhou, Min Zhang, Jiayu Li   +4 more
wiley   +1 more source