Results 81 to 90 of about 510 (196)

Tree stands of Scots pine and Norway spruce state assessment using hemispherical photography by Fish-eye lens and subsequent analysis of the digital images

Известия СПбЛТА, 2020
На примере чистых и смешанных древостоев хвойных пород с преобладанием сосны обыкновенной и ели европейской было проведено поисковое исследование возможностей определения состояния древостоев на основе цифровой полусферической съемки полога леса снизу вверх объективом типа «Рыбий глаз» и последующей обработки полученных изображений.
openaire   +1 more source

A step into the shadows: Evolutionary shifts in fruit structure and dispersal strategies in Asian mycoheterotrophic Ericaceae

PLANTS, PEOPLE, PLANET, EarlyView.
This study examines how the fruits of non‐photosynthetic forest plants in the Monotropoideae (Ericaceae) have evolved into the diversity observed today. By analyzing four Asian species, we identified a shift from dry, dehiscent fruits that release seeds into the air to fleshy, berry‐like fruits adapted for animal dispersal.
Alexey N. Sorokin, Kenji Suetsugu, Olga V. Yatsenko, Mikhail S. Romanov, Nikita S. Zdravchev, Petr S. Iovlev, Anton S. Timchenko, Anna A. Mikhaylova, Kirill V. Kuptsov, Alexey V. F. Ch. Bobrov   +9 more
wiley   +1 more source

Comparison of optical and digital techniques for light microclimate assessment in the Paneveggio Forest, Trentino, Italy

Forest@, 2006
Hemispherical photography is a widely used tool for the indirect estimation of forest light environment and quantification of canopy openness, LAI, and direct and diffuse canopy light transmittance.
doaj  

The Fifth Phase of the Radiation Transfer Model Intercomparison Exercise (RAMI-V): Experiment Description and Results on Actual Canopy Scenarios

Journal of Remote Sensing
This paper presents the latest results of the radiation transfer model intercomparison (RAMI) of the realistic vegetation scenarios. RAMI-V included the same one-dimensional (1D) and 3D scenes of RAMI-IV phase and 2 new realistic ones, defined through a ...
Christian Lanconelli, Nadine Gobron, Monica Robustelli, Jennifer Susan Adams, Kim Calders, Mathias Disney, Jean-Philippe Gastellu-Etchegorry, Adam Goodenough, Yves Govaerts, Robin J. Hogan, Huaguo Huang, Hideki Kobayashi, Andres Kuusk, Vincent Leroy, Niall Origo, Jianbo Qi, Sebastian Schunke, Martin Leeuwen, Yingjie Wang, Donghui Xie, Yelu Zeng, Feng Zhao   +21 more
doaj   +1 more source

Using Airborne Laser Scanning and Sentinel‐2 to Understand Subcanopy Light Regimes and Understory Diversity of Vascular Plants in Temperate Mountain Forests

Remote Sensing in Ecology and Conservation, EarlyView.
This study demonstrates that not just Airborne Laser Scanning, but also Sentinel‐2 can effectively estimate absolute canopy cover and canopy cover heterogeneity ‐ structural metrics that determine the subcanopy light regime, found to be linked to the vascular plant species richness in the understory of temperate mountain forests.
Felix Wieland‐Glasmann, Cornelius Senf, Kristin H. Braziunas, Rupert Seidl, Peter Annighöfer   +4 more
wiley   +1 more source

Integrating Image Segmentation and Deep Learning to Improve Radio Frequency Propagation Models

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This paper proposes a multi‐sensor approach to improve radio frequency (RF) propagation models, which play a key role in the rapidly expanding field of connected vehicle technology. Focusing on the 1‐ to 20‐GHz frequency range, which is critical for both satellite‐to‐vehicle and base station‐to‐vehicle communications, our study introduces a ...
Jonathan Israel, Xavier Boulanger, Vegard Arneson   +2 more
wiley   +1 more source

Estimation of vegetation biophysical parameters in grasslands and crops in Chile through hemispheric digital photography by a GoPro camera

Revista de Teledetección, 2018
The estimation of the biophysical parameters of vegetation such as LAI (Leaf Area Index), FAPAR (Fraction of Absorbed Photosynthetically Active Radiation) and FCOVER (Fraction of Green Vegetation) have many climatic, hydrologic, ecosystem and silvo-agricultural applications.
D. Uribe, C. Mattar, F. Camacho
openaire   +1 more source

Life‐history stages and behavior influence demographic classification of moose captured on remote cameras

Wildlife Biology, EarlyView.
Obtaining accurate information on demographic states, such as the age and sex classes of animals, is an important step for monitoring wildlife populations. Traditionally, demographic data are collected from harvest, aerial surveys and telemetry studies.
Alexej P. K. Sirén, Zalmai Moheb, Emily Carlson, Adam Beiner, Michael Pfeister, Ian Doherty, Bruno López Del Hierro, Claudio López Del Hierro, Isabella Hanley, Helena Firlings, Ela Shevket, Arielle Lifton‐Jochnowitz, Lee Kantar, Scott R. McLellan, Carter Barthelman, Tammy L. Wilson   +15 more
wiley   +1 more source

Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives

High Voltage, EarlyView.
ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu, Hao Sun, Yi Wu, Mingzhe Rong, Zeyuan Luo   +4 more
wiley   +1 more source

Sino‐Mexican Encounters Before the ‘Diplomatic Opening’: Exhibition Diplomacy and Grassroots Friendship in the 1960s

History, EarlyView.
Abstract During the 1960s, Mexico's Institutional Revolutionary Party (PRI) embraced Chinese overtures for a commercial opening as consistent with its anti‐imperialist posture, thereby foreshadowing the diplomatic opening to China in 1972. Yet this professed ideological pluralism was eclipsed by an underlying allegiance to the United States' anti ...
YIXIN TIAN
wiley   +1 more source