Results 111 to 120 of about 751 (246)

A Normalization-Calibration Model for Multi-Source Ground-Based FPAR Observations in Mountainous Forests

Remote Sensing
The fraction of absorbed photosynthetically active radiation (FPAR) is a key physiological variable for characterizing vegetation structure and associated matter and energy exchange processes.
Yongxin Cai, Ainong Li, Jinhu Bian, Zhengjian Zhang, Limin Chen, Xiaohan Lin, Yi Deng, Xi Nan, Guangbin Lei, Amin Naboureh   +9 more
doaj   +1 more source

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

Validation of the vertical canopy cover profile products derived from GEDI over selected forest sites

Science of Remote Sensing
Canopy cover (CC) quantifies the proportion of canopy materials projected vertically onto the ground surface. CC is a crucial canopy structural variable and is commonly used in many ecological and climatic models.
Yu Li, Hongliang Fang, Yao Wang, Sijia Li, Tian Ma, Yunjia Wu, Hao Tang   +6 more
doaj   +1 more source

Strategies for Assessing Post‐Wildfire Geomorphic Resilience in Semiarid Rivers

River Research and Applications, EarlyView.
ABSTRACT We review and summarize diverse components of a catchment that can be monitored after wildfire to assess the geomorphic resilience of the river corridor in semiarid regions. We distinguish upland portions of river catchments from river corridors.
Ellen Wohl, Shayla Triantafillou, Alex Thornton‐Dunwoody, Connor Mertz, Katie Larkin, William Keenan, Steven Griffin, Dylan Davis, Lindsey Blehm   +8 more
wiley   +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

Adjusting line quantum sensing to improve leaf area index measurements and estimations in forests. [PDF]

MethodsX, 2022
Battuvshin G, Menzel L.
europepmc   +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