Results 91 to 100 of about 7,187,705 (377)

Autonomous Drone Landing with Fiducial Markers and a Gimbal-Mounted Camera for Active Tracking [PDF]

arXiv, 2022
Precision landing is a remaining challenge in autonomous drone flight. Fiducial markers provide a computationally cheap way for a drone to locate a landing pad and autonomously execute precision landings. However, most work in this field depends on either rigidly-mounted or downward-facing cameras which restrict the drone's ability to detect the marker.
arxiv  

Butterfly‐Inspired Hierarchical Hybrid Composites for Lightweight Structural Thermal Management Applications

Advanced Functional Materials, EarlyView.
Emulating nature's unparalleled engineering, this work introduces butterfly‐inspired hybrid composites for high‐performance transportation and defense sectors. Leveraging biomimicry, these lightweight composites feature butterfly leg‐inspired hierarchical fibrous assemblies and butterfly wing‐inspired sandwich‐structured architecture, to achieve ...
Nello D. Sansone, Rafaela Aguiar, Mahmoud Embabi, Nichole Cheung, Anthony V. Tuccitto, Nathan R. S. Chang, Matthew Leroux, Patrick C. Lee   +7 more
wiley   +1 more source

The research on identification and spatial pattern of urban mixed land-use: A case study of Chengdu

Ecological Indicators, 2023
In the context of urban quality enhancement, resilience focus, and the promotion of human-centered urbanization, a well-structured mixed land-use layout plays a pivotal role in intensifying conservation land use, enhancing land use efficiency, and ...
Pengzhi Deng, Qing Huang, Fei Liu, Zeyu Wang, Manshuang Liu   +4 more
doaj  

Land‐Use Impacts on Plant Functional Diversity Throughout Europe

Global Ecology and Biogeography
ABSTRACTAimGlobal biodiversity loss resulting from anthropogenic land‐use activities is a pressing concern, requiring precise assessments of impacts at large spatial extents. Existing models mainly focus on species richness and abundance, lacking insights into ecological mechanisms and species' roles in ecosystem functioning.
Francesca Rosa, Peter M. van Bodegom, Stefanie Hellweg, Stephan Pfister, Idoia Biurrun, Steffen Boch, Milan Chytrý, Renata Ćušterevska, Michele Dalle Fratte, Gabriella Damasceno, Emmanuel Garbolino, Jonathan Lenoir, Wim A Ozinga, Josep Penuelas, Francesco Maria Sabatini, Franziska Schrodt, Domas Uogintas, Chaeho Byun, Jiri Dolezal, Tetiana Dziuba, Bruno Hérault, Irene Martín-Forés, Ülo Niinemets, Gwendolyn Peyre, Laura Scherer   +24 more
openaire   +6 more sources

Multi‐Scaled Cellulosic Nanonetworks from Tunicates

Advanced Functional Materials, EarlyView.
Microbial and plant nanonetworks of cellulose have enabled a wide range of high‐performance yet sustainable materials. Herein, a third class of cellulosic nanonetworks is showcased by exploiting the only animal tissue‐producing cellulose nanofibers, i.e., ascidians. An ultrastructure including spherical cells and a microvasculature with diameters of 50–
Mano Govindharaj, Mohamed Hamid Salim, M‐Haidar A. Dali, Sarath Haridas Kaniyamparambil, Sagar S. Arya, Zubeen Hathi, Srinivas Mettu, Erlantz Lizundia, Anna Maria Pappa, Charalampos Pitsalidis, Blaise L. Tardy   +10 more
wiley   +1 more source

Simulation of Land Use Change and Ecosystem Service Value Dynamics under Ecological Constraints in Anhui Province, China

International Journal of Environmental Research and Public Health, 2020
Land use change has a significant impact on the structure and function of ecosystems, and the transformation of ecosystems affects the mode and efficiency of land use, which reflects a mutual interaction relationship.
Sai Hu, Longqian Chen, Long Li, Ting Zhang, Lina Yuan, Liang Cheng, Jia Wang, M. Wen   +7 more
semanticscholar   +1 more source

Scales of Diversity Affecting Ecosystem Function across Agricultural and Forest Landscapes in Louisiana

Diversity
Current land use and extensive modifications of natural ecosystems across the state of Louisiana are generally similar to those across the southeastern USA where rainfall supports forest ecosystems.
William D. Pitman
doaj   +1 more source

Evolution and Transformation Analysis of Land-use in Mountainous “Granary”—Evidence from Typical Basin in Karst Mountainous Areas of Southwest China

Land, 2023
Intermountain basins are the granaries of the karst mountains of southwest China. Revealing the process and trend of land-use transformation in typical mountainous “granaries” is of great significance to optimizing land-use, food security, and rural ...
Mei Chen, Yangbing Li, Yiyi Zhang, Limin Yu, Linyu Yang   +4 more
doaj   +1 more source

Urban land-use analysis using proximate sensing imagery: a survey [PDF]

arXiv, 2021
Urban regions are complicated functional systems that are closely associated with and reshaped by human activities. The propagation of online geographic information-sharing platforms and mobile devices equipped with Global Positioning System (GPS) greatly proliferates proximate sensing images taken near or on the ground at a close distance to urban ...
arxiv  

Electricity Generation From Ambient Water Evaporation in the Absence of Sunlight via PVA‐Based Porous Hydrogels

Advanced Functional Materials, EarlyView.
In this article, a water‐evaporation driven energy harvester is devised that works even in the absence of sunlight. This is achieved by combining PVA hydrogel with thermoelectrics (TEG) to directly capture energy from water evaporation. Under mild conditions (RH 40%, T of 26 °C, and 2.8 m s−1 wind), 1.71 mW (1.02 W m−2) power can be generated, >3 fold ...
Zichen Gong, Ady Suwardi, Jing Cao
wiley   +1 more source