Results 61 to 70 of about 145,094 (294)

Establishing a Model Precursor System: Over a Decade of Research on Carbon Dots from the Citric Acid‐Urea System

Advanced Functional Materials, EarlyView.
The citric acid/urea (CA‐Urea) precursor system offers a versatile, scalable route to carbon dots with tunable luminescence and multifunctionality. Mechanistic insights into precursor chemistry and reaction parameters have enabled doping, surface modification, and hybridization strategies, yielding CDs for luminescent devices, sensing, catalysis ...
Yupeng Liu, Zhiqi Cai, Xiangxin Sun, Hanyi Zhang, Yiming Hao, Jun Wu, Zekun Yan, Xue Wu, Yiqi Liang, Liming Wang, Songnan Qu   +10 more
wiley   +1 more source

Temporal variability in remote sensing accuracy for wetland mapping: a case study from Sentinel-1 and Sentinel-2 in Northeast China

International Journal of Digital Earth
Wetlands are vital ecosystems that support regional ecological balance and require efficient, accurate, and cost-effective monitoring approaches. This study enhances wetland mapping in the Sanjiang Plain using multi-source (Sentinel-1 SAR and Sentinel-2 ...
Wenqi Zhang, Chong Luo, Zongming Wang, Dehua Mao   +3 more
doaj   +1 more source

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Investigating Sentinel-1 and Sentinel-2 Data Efficiency in Studying the Temporal Behavior of Wheat Phenological Stages Using Google Earth Engine

Agriculture, 2022
Crop monitoring is critical for sustaining agriculture, preserving natural resources, and dealing with the effects of population growth and climate change.
Hajar Saad El Imanni, Abderrazak El Harti, Jonathan Panimboza   +2 more
doaj   +1 more source

Sentinel-2 for Mapping Iron Absorption Feature Parameters [PDF]

Remote Sensing, 2015
Iron is an indicator for soil fertility and the usability of an area for cultivating crops. Remote sensing is the only suitable tool for surveying large areas at a high temporal and spatial interval, yet a relative high spectral resolution is needed for mapping iron contents with reflectance data. Sentinel-2 has several bands that cover the 0.9 μm iron
Harald Van der Werff, Freek Van der Meer
openaire   +3 more sources

Identifying cropped areas in small growers agricultural regions using data mining for food security [PDF]

, 2014
The present study aimed at testing the potential of the future mission SENTINEL-2 (European Copernicus program) to map croplands in a region of Madagascar characterized by small size fields and frequent cloud covering.
Andriandrahona Fidiniaina, Ramahandry, Bégué, Agnès, Dupuy, Stéphane, Ienco, Dino, Lebourgeois, Valentine, Teisseire, Maguelonne, Vintrou, Elodie   +6 more
core  

Evaluation of Landsat-8 and Sentinel-2A Aerosol Optical Depth Retrievals Across Chinese Cities and Implications for Medium Spatial Resolution Urban Aerosol Monitoring [PDF]

, 2019
In urban environments, aerosol distributions may change rapidly due to building and transport infrastructure and human population density variations.
Huang, Haiyan, Li, Zhongbin, Roy, David P., Vermote, Eric, Zhang, Hankui   +4 more
core   +2 more sources

Turning Unpredictable Biomolecule Adsorption to Controlled Corona Formation: Focus on Carbon Nanomaterials

Advanced Materials, EarlyView.
Controlling the protein corona formation onto carbon nanomaterials (CNMs) enhances their functionalities as platforms for cancer theranostics. Here, we reviewed the effects of the intrinsic and acquired properties of CNMs on protein corona formation, the consequent biological and toxicological outcomes, and the strategies to reshape corona formation ...
Yajuan Zou, Yalei Hu, Jie Yu, Naoki Komatsu, Yuta Nishina, Alberto Bianco   +5 more
wiley   +1 more source

Mapping Informal Settlements in Developing Countries using Machine Learning and Low Resolution Multi-spectral Data

, 2019
Informal settlements are home to the most socially and economically vulnerable people on the planet. In order to deliver effective economic and social aid, non-government organizations (NGOs), such as the United Nations Children's Fund (UNICEF), require ...
Azam, Faiza, Bilinski, Piotr, Coca-Castro, Alejandro, Gram-Hansen, Bradley, Helber, Patrick, Kopackova, Veronika, Varatharajan, Indhu   +6 more
core   +1 more source

CMOS detectors for space applications: from R&D to operational program with large volume foundry [PDF]

, 2010
Nowadays, CMOS image sensors are widely considered for space applications. The use of CIS (CMOS Image sensor) processes has significantly enhanced their performances such as dark current, quantum efficiency and conversion gain.
Breart de Boisanger, Michel, Corbière, Franck, Larnaudie, Franck, Magnan, Pierre, Martin-Gonthier, Philippe, Rolando, Sébastien, Saint-Pé, Olivier   +6 more
core   +1 more source