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1,348 Results Found

  • Article
  • Open Access
451 Views
20 Pages

13 February 2026

Long-acting injectable HIV pre-exposure prophylaxis (LAI-PrEP) demonstrates superior efficacy to oral PrEP but faces a critical implementation challenge: 47% of patients fail to receive their first injection during the “bridge period” bet...

  • Article
  • Open Access
21 Citations
4,976 Views
16 Pages

2 January 2020

Leaf area index (LAI) is an important parameter for monitoring the physical and biological processes of vegetation canopy. Due to the constraints of cloud contamination, snowfall, and instrument conditions, most of the current satellite remote sensin...

  • Article
  • Open Access
70 Citations
10,754 Views
18 Pages

Estimation of Leaf Area Index Using DEIMOS-1 Data: Application and Transferability of a Semi-Empirical Relationship between two Agricultural Areas

  • Francesco Vuolo,
  • Nikolaus Neugebauer,
  • Salvatore Falanga Bolognesi,
  • Clement Atzberger and
  • Guido D'Urso

12 March 2013

This work evaluates different procedures for the application of a semi-empirical model to derive time-series of Leaf Area Index (LAI) maps in operation frameworks. For demonstration, multi-temporal observations of DEIMOS-1 satellite sensor data were...

  • Article
  • Open Access
272 Citations
15,705 Views
14 Pages

Retrieving Soybean Leaf Area Index from Unmanned Aerial Vehicle Hyperspectral Remote Sensing: Analysis of RF, ANN, and SVM Regression Models

  • Huanhuan Yuan,
  • Guijun Yang,
  • Changchun Li,
  • Yanjie Wang,
  • Jiangang Liu,
  • Haiyang Yu,
  • Haikuan Feng,
  • Bo Xu,
  • Xiaoqing Zhao and
  • Xiaodong Yang

25 March 2017

Leaf area index (LAI) is an important indicator of plant growth and yield that can be monitored by remote sensing. Several models were constructed using datasets derived from SRS and STR sampling methods to determine the optimal model for soybean (mu...

  • Feature Paper
  • Article
  • Open Access
5 Citations
3,984 Views
9 Pages

8 October 2018

Oral health behaviours of children are formulated from a very young age. Formation of those behaviours among very young children is dependent on their mothers/caregivers who may themselves require support from the health profession or laypersons. The...

  • Article
  • Open Access
9 Citations
3,913 Views
14 Pages

Objectives: A culturally informed, peer-led, lay provider model, the Senior Companion Program (SCP) Plus, was implemented to decrease caregiving burden/stress and improve coping skills and social support for African American ADRD caregivers. This stu...

  • Article
  • Open Access
35 Citations
5,158 Views
21 Pages

Cropland Suitability Assessment Using Satellite-Based Biophysical Vegetation Properties and Machine Learning

  • Dorijan Radočaj,
  • Mladen Jurišić,
  • Mateo Gašparović,
  • Ivan Plaščak and
  • Oleg Antonić

16 August 2021

The determination of cropland suitability is a major step for adapting to the increased food demands caused by population growth, climate change and environmental contamination. This study presents a novel cropland suitability assessment approach bas...

  • Article
  • Open Access
15 Citations
5,885 Views
17 Pages

A Cost-Constrained Sampling Strategy in Support of LAI Product Validation in Mountainous Areas

  • Gaofei Yin,
  • Ainong Li,
  • Yelu Zeng,
  • Baodong Xu,
  • Wei Zhao,
  • Xi Nan,
  • Huaan Jin and
  • Jinhu Bian

26 August 2016

Increasing attention is being paid on leaf area index (LAI) retrieval in mountainous areas. Mountainous areas present extreme topographic variability, and are characterized by more spatial heterogeneity and inaccessibility compared with flat terrain....

  • Article
  • Open Access
9 Citations
4,425 Views
13 Pages

Background: Little is known about the implementation of lifestyle interventions in frail, community-dwelling people. This study highlights different domains of adherence to explain an effectively delivered home-based intervention. Methods: Eighty pre...

  • Article
  • Open Access
3 Citations
3,398 Views
26 Pages

Spatial Application of Southern U.S. Pine Water Yield for Prioritizing Forest Management Activities

  • Jordan Vernon,
  • Joseph St. Peter,
  • Christy Crandall,
  • Olufunke E. Awowale,
  • Paul Medley,
  • Jason Drake and
  • Victor Ibeanusi

Forest management depends on forest condition data and the ability to quantify the impacts of management activities to make informed decisions. Spatially quantifying water yield (WY) from forests across large landscapes enables managers to consider p...

  • Article
  • Open Access
5 Citations
2,250 Views
13 Pages

28 August 2023

Crop evapotranspiration (ETC) water demands are critical decision support information for the sustainable use of water resources for optimum crop productivity. When measurements of ETC at all locations are not feasible, the prediction of ETC and crop...

  • Article
  • Open Access
4 Citations
5,862 Views
16 Pages

Crop Yield Assessment Using Field-Based Data and Crop Models at the Village Level: A Case Study on a Homogeneous Rice Area in Telangana, India

  • Roja Mandapati,
  • Murali Krishna Gumma,
  • Devender Reddy Metuku,
  • Pavan Kumar Bellam,
  • Pranay Panjala,
  • Sagar Maitra and
  • Nagaraju Maila

Crop yield estimation has gained importance due to its vital significance for policymakers and decision-makers in enacting schemes, ensuring food security, and assessing crop insurance losses due to biotic and abiotic stress. This research focused on...

  • Article
  • Open Access
28 Citations
4,311 Views
19 Pages

Hyperspectral Estimation of Winter Wheat Leaf Area Index Based on Continuous Wavelet Transform and Fractional Order Differentiation

  • Changchun Li,
  • Yilin Wang,
  • Chunyan Ma,
  • Fan Ding,
  • Yacong Li,
  • Weinan Chen,
  • Jingbo Li and
  • Zhen Xiao

20 December 2021

Leaf area index (LAI) is highly related to crop growth, and the traditional LAI measurement methods are field destructive and unable to be acquired by large-scale, continuous, and real-time means. In this study, fractional order differential and cont...

  • Article
  • Open Access
30 Citations
4,350 Views
19 Pages

Assessment of Cornfield LAI Retrieved from Multi-Source Satellite Data Using Continuous Field LAI Measurements Based on a Wireless Sensor Network

  • Lihong Yu,
  • Jiali Shang,
  • Zhiqiang Cheng,
  • Zebin Gao,
  • Zixin Wang,
  • Luo Tian,
  • Dantong Wang,
  • Tao Che,
  • Rui Jin and
  • Yonghua Qu
  • + 2 authors

11 October 2020

Accurate and continuous monitoring of leaf area index (LAI), a widely-used vegetation structural parameter, is crucial to characterize crop growth conditions and forecast crop yield. Meanwhile, advancements in collecting field LAI measurements have p...

  • Technical Note
  • Open Access
139 Citations
10,873 Views
14 Pages

12 December 2017

Leaf area index (LAI) is a significant biophysical variable in the models of hydrology, climatology and crop growth. Rapid monitoring of LAI is critical in modern precision agriculture. Remote sensing (RS) on satellite, aerial and unmanned aerial veh...

  • Article
  • Open Access
17 Citations
3,019 Views
21 Pages

Leaf Area Index Inversion of Spartina alterniflora Using UAV Hyperspectral Data Based on Multiple Optimized Machine Learning Algorithms

  • Hua Fang,
  • Weidong Man,
  • Mingyue Liu,
  • Yongbin Zhang,
  • Xingtong Chen,
  • Xiang Li,
  • Jiannan He and
  • Di Tian

11 September 2023

The leaf area index (LAI) is an essential biophysical parameter for describing the vegetation canopy structure and predicting its growth and productivity. Using unmanned aerial vehicle (UAV) hyperspectral imagery to accurately estimate the LAI is of...

  • Article
  • Open Access
8 Citations
4,102 Views
22 Pages

26 August 2020

Modeled leaf area index (LAI) in conjunction with satellite-derived LAI data streams may be used to support various regional and local scale air quality models for retrospective and future meteorological assessments. The Environmental Policy Integrat...

  • Review
  • Open Access
3 Citations
18,160 Views
30 Pages

Global Leaf Area Index Research over the Past 75 Years: A Comprehensive Review and Bibliometric Analysis

  • Jun Ma,
  • Jianpeng Zhang,
  • Jinliang Wang,
  • Vadim Khromykh,
  • Jie Li and
  • Xuzheng Zhong

8 February 2023

The leaf area index (LAI) is widely used as an important indicator and ecological parameter of vegetation structure and growth status, but the LAI lacks bibliometric analysis. To further understand the LAI’s research status and frontier dynamic...

  • Article
  • Open Access
20 Citations
8,070 Views
20 Pages

The Design and Implementation of the Leaf Area Index Sensor

  • Xiuhong Li,
  • Qiang Liu,
  • Rongjin Yang,
  • Haijing Zhang,
  • Jialin Zhang and
  • Erli Cai

13 March 2015

The quick and accurate acquisition of crop growth parameters on a large scale is important for agricultural management and food security. The combination of photographic and wireless sensor network (WSN) techniques can be used to collect agricultural...

  • Article
  • Open Access
89 Citations
7,607 Views
17 Pages

Combining Spectral and Texture Features of UAS-Based Multispectral Images for Maize Leaf Area Index Estimation

  • Xuewei Zhang,
  • Kefei Zhang,
  • Yaqin Sun,
  • Yindi Zhao,
  • Huifu Zhuang,
  • Wei Ban,
  • Yu Chen,
  • Erjiang Fu,
  • Shuo Chen and
  • Yumeng Hao
  • + 1 author

11 January 2022

The leaf area index (LAI) is of great significance for crop growth monitoring. Recently, unmanned aerial systems (UASs) have experienced rapid development and can provide critical data support for crop LAI monitoring. This study investigates the effe...

  • Article
  • Open Access
7 Citations
1,201 Views
19 Pages

Winter Oilseed Rape LAI Inversion via Multi-Source UAV Fusion: A Three-Dimensional Texture and Machine Learning Approach

  • Zijun Tang,
  • Junsheng Lu,
  • Ahmed Elsayed Abdelghany,
  • Penghai Su,
  • Ming Jin,
  • Siqi Li,
  • Tao Sun,
  • Youzhen Xiang,
  • Zhijun Li and
  • Fucang Zhang

19 April 2025

Leaf area index (LAI) serves as a critical indicator for evaluating crop growth and guiding field management practices. While spectral information (vegetation indices and texture features) extracted from multispectral sensors mounted on unmanned aeri...

  • Article
  • Open Access
3 Citations
2,868 Views
26 Pages

20 October 2023

The moderate resolution imaging spectroradiometer (MODIS) calculates the leaf area index (LAI) for each pixel without incorporating the temporal correlation information, leading to a higher sensitivity for the LAI that produces uncertainties in obser...

  • Article
  • Open Access
7 Citations
3,926 Views
24 Pages

20 May 2022

The leaf area index (LAI), a key parameter used to characterize the structure and function of the vegetation canopy, is crucial to simulations of the carbon, nitrogen, and water cycles of Earth’s system. In this paper, a neural network (NN) met...

  • Article
  • Open Access
6 Citations
2,390 Views
18 Pages

25 October 2023

The prediction of the daily crop leaf area index (LAI) plays a crucial role in forecasting crop growth trends and guiding field management decisions in the realm of scientific research. However, research on the daily prediction of LAI is scarce, and...

  • Article
  • Open Access
287 Views
24 Pages

16 February 2026

Leaf area index (LAI) is a key vegetation structural parameter widely used to quantify vegetation dynamics. A thorough understanding of its spatiotemporal characteristics and driving mechanisms is essential for sustainable ecosystem management. This...

  • Article
  • Open Access
24 Citations
7,340 Views
24 Pages

2 July 2014

The leaf area index (LAI) is a crucial parameter of vegetation structure. It provides key information for earth surface process simulations and climate change research on the global and regional scales. Focusing on the meadow steppe in Hulunber, Inne...

  • Article
  • Open Access
1 Citations
1,146 Views
22 Pages

Spatiotemporal Dynamics and Multiple Drivers of Vegetation Cover in the Jinsha River Basin: A Geodetector-Based Analysis

  • Ran Zhai,
  • Jun Luan,
  • Juanru Yang,
  • Zhi Xu,
  • Liwen Xu,
  • Jin Tian,
  • Zhenyu Lv,
  • Xiao Chen and
  • Yuping Bai

11 August 2025

Under intensified global climate change and complex land use transitions, the Leaf Area Index (LAI) serves as a key ecological indicator to monitor vegetation responses to natural and anthropogenic factors. This study provided a comprehensive spatiot...

  • Article
  • Open Access
18 Citations
4,302 Views
20 Pages

25 March 2024

The monitoring of crop growth, particularly the estimation of Leaf Area Index (LAI) using optical remote sensing techniques, has been a continuous area of research. However, it has become a challenge to accurately and rapidly interpret the spatial va...

  • Article
  • Open Access
20 Citations
3,916 Views
17 Pages

Modeling the Leaf Area Index of Inner Mongolia Grassland Based on Machine Learning Regression Algorithms Incorporating Empirical Knowledge

  • Beibei Shen,
  • Lei Ding,
  • Leichao Ma,
  • Zhenwang Li,
  • Alim Pulatov,
  • Zheenbek Kulenbekov,
  • Jiquan Chen,
  • Saltanat Mambetova,
  • Lulu Hou and
  • Xiaoping Xin
  • + 2 authors

26 August 2022

Leaf area index (LAI) is one of the key biophysical indicators for characterizing the growth and status of vegetation and is also used in modeling earth system processes. Machine learning algorithms (MLAs) such as random forest regression (RFR), arti...

  • Review
  • Open Access
48 Citations
10,359 Views
32 Pages

10 September 2020

Leaf area index (LAI) is an important vegetation leaf structure parameter in forest and agricultural ecosystems. Remote sensing techniques can provide an effective alternative to field-based observation of LAI. Differences in canopy structure result...

  • Article
  • Open Access
10 Citations
7,670 Views
19 Pages

Towards an Improved LAI Collection Protocol via Simulated and Field-Based PAR Sensing

  • Wei Yao,
  • David Kelbe,
  • Martin Van Leeuwen,
  • Paul Romanczyk and
  • Jan Van Aardt

14 July 2016

In support of NASA’s next-generation spectrometer—the Hyperspectral Infrared Imager (HyspIRI)—we are working towards assessing sub-pixel vegetation structure from imaging spectroscopy data. Of particular interest is Leaf Area Index (LAI), which is an...

  • Article
  • Open Access
29 Citations
6,073 Views
15 Pages

1 January 2017

Leaf area index (LAI) is an important biophysical parameter and the retrieval of LAI from remote sensing data is the only feasible method for generating LAI products at regional and global scales. However, most LAI retrieval methods use satellite obs...

  • Article
  • Open Access
1 Citations
1,554 Views
20 Pages

21 February 2025

In modern agriculture, timely and accurate crop yield information is crucial for optimising agricultural production management and resource allocation. This study focused on improving the prediction accuracy of pear yields. Taking Alar City, Xinjiang...

  • Article
  • Open Access
2 Citations
1,656 Views
26 Pages

An Approach to Refining MODIS LAI Data Using a Fitting Scale Factor Time Series

  • Junxian Tang,
  • Peijuan Wang,
  • Rui Feng,
  • Yang Li and
  • Qing Li

15 January 2025

The leaf area index (LAI) serves as a key metric for tracking crop growth and can be integrated into crop models for yield estimation. Although the remote sensing LAI data provide a critical foundation for monitoring crop growth and estimating yields...

  • Review
  • Open Access
39 Citations
10,496 Views
10 Pages

A rapid review was performed to determine (1) the number and causes of reported laboratory-acquired infections (LAI) in the Asia-Pacific region; (2) their significance and threat to the community; (3) the primary risk factors associated with LAIs; (4...

  • Article
  • Open Access
10 Citations
7,928 Views
25 Pages

Estimating Leaf Area Index in Apple Orchard by UAV Multispectral Images with Spectral and Texture Information

  • Junru Yu,
  • Yu Zhang,
  • Zhenghua Song,
  • Danyao Jiang,
  • Yiming Guo,
  • Yanfu Liu and
  • Qingrui Chang

31 August 2024

The Leaf Area Index (LAI) strongly influences vegetation evapotranspiration and photosynthesis rates. Timely and accurately estimating the LAI is crucial for monitoring vegetation growth. The unmanned aerial vehicle (UAV) multispectral digital camera...

  • Article
  • Open Access
21 Citations
4,295 Views
16 Pages

The Three-River Source Region (TRSR) is an important area for the ecological security of China. Vegetation growth has been affected by the climate change, topography, and human activities in this area. However, few studies have focused on analyzing t...

  • Article
  • Open Access
743 Views
26 Pages

25 April 2025

Leaf Area Index (LAI) is one of the key parameters for characterizing leaf density, vegetation growth status, and canopy structure. Rapid, objective, and accurate acquisition of forest LAI is of great significance for studying forest ecosystems and f...

  • Article
  • Open Access
24 Citations
3,416 Views
16 Pages

An Investigation of Winter Wheat Leaf Area Index Fitting Model Using Spectral and Canopy Height Model Data from Unmanned Aerial Vehicle Imagery

  • Xuewei Zhang,
  • Kefei Zhang,
  • Suqin Wu,
  • Hongtao Shi,
  • Yaqin Sun,
  • Yindi Zhao,
  • Erjiang Fu,
  • Shuo Chen,
  • Chaofa Bian and
  • Wei Ban

12 October 2022

The leaf area index (LAI) is critical for the respiration, transpiration, and photosynthesis of crops. Color indices (CIs) and vegetation indices (VIs) extracted from unmanned aerial vehicle (UAV) imagery have been widely applied to the monitoring of...

  • Article
  • Open Access
2 Citations
2,788 Views
16 Pages

29 September 2022

This study aimed to evaluate embryonic development; analyze the glucose, triiodothyronine (T3), and thyroxine (T4) concentrations in the blood of embryos and goslings; and assess the structure and temperature (EST) of the eggshell. The eggs that were...

  • Article
  • Open Access
106 Citations
12,134 Views
20 Pages

18 October 2017

To accurately estimate leaf area index (LAI) in mangrove areas, the selection of appropriate models and predictor variables is critical. However, there is a major challenge in quantifying and mapping LAI using multi-spectral sensors due to the satura...

  • Article
  • Open Access
1 Citations
1,171 Views
21 Pages

LAI Mapping of Winter Moso Bamboo Forests Using Zhuhai-1 Hyperspectral Images and a PSO-SVM Model

  • Xiaoyu Guo,
  • Weisen Wang,
  • Fangyu Meng,
  • Mingjing Li,
  • Zhanghua Xu and
  • Xiaoman Zheng

6 March 2025

Moso bamboo forests (MBFs) are unique subtropical ecosystems characterized by distinct leaf phenology, bamboo shoots, rapid growth, and carbon sequestration capability. Leaf area index (LAI) is an essential metric for evaluating the productivity and...

  • Article
  • Open Access
10 Citations
2,448 Views
15 Pages

Synchronous Retrieval of Wheat Cab and LAI from UAV Remote Sensing: Application of the Optimized Estimation Inversion Framework

  • Jiangtao Ji,
  • Xiaofei Wang,
  • Hao Ma,
  • Fengxun Zheng,
  • Yi Shi,
  • Hongwei Cui and
  • Shaoshuai Zhao

10 February 2024

Chlorophyll a and b content (Cab) and leaf area index (LAI) are two key parameters of crops, and their quantitative inversions are important for growth monitoring and the field management of wheat. However, due to the close correlation between the sp...

  • Article
  • Open Access
3 Citations
1,916 Views
16 Pages

A New Spectral Index for Monitoring Leaf Area Index of Winter Oilseed Rape (Brassica napus L.) under Different Coverage Methods and Nitrogen Treatments

  • Hao Liu,
  • Youzhen Xiang,
  • Junying Chen,
  • Yuxiao Wu,
  • Ruiqi Du,
  • Zijun Tang,
  • Ning Yang,
  • Hongzhao Shi,
  • Zhijun Li and
  • Fucang Zhang

10 July 2024

The leaf area index (LAI) is a crucial physiological indicator of crop growth. This paper introduces a new spectral index to overcome angle effects in estimating the LAI of crops. This study quantitatively analyzes the relationship between LAI and mu...

  • Article
  • Open Access
11 Citations
3,797 Views
23 Pages

Quantifying Irrigated Winter Wheat LAI in Argentina Using Multiple Sentinel-1 Incidence Angles

  • Gabriel Caballero,
  • Alejandro Pezzola,
  • Cristina Winschel,
  • Alejandra Casella,
  • Paolo Sanchez Angonova,
  • Luciano Orden,
  • Katja Berger,
  • Jochem Verrelst and
  • Jesús Delegido

19 November 2022

Synthetic aperture radar (SAR) data provides an appealing opportunity for all-weather day or night Earth surface monitoring. The European constellation Sentinel-1 (S1) consisting of S1-A and S1-B satellites offers a suitable revisit time and spatial...

  • Article
  • Open Access
57 Citations
9,521 Views
26 Pages

13 April 2016

Leaf area index (LAI) is an important biophysical trait for forest ecosystem and ecological modeling, as it plays a key role for the forest productivity and structural characteristics. The ground-based methods like the handheld optical instruments fo...

  • Article
  • Open Access
48 Citations
10,310 Views
25 Pages

20 December 2022

Leaf Area Index (LAI) is an important parameter which can be used for crop growth monitoring and yield estimation. Many studies have been carried out to estimate LAI with remote sensing data obtained by sensors mounted on Unmanned Aerial Vehicles (UA...

  • Article
  • Open Access
18 Citations
2,732 Views
13 Pages

Estimation of the Leaf Area Index of Winter Rapeseed Based on Hyperspectral and Machine Learning

  • Wei Zhang,
  • Zhijun Li,
  • Yang Pu,
  • Yunteng Zhang,
  • Zijun Tang,
  • Junyu Fu,
  • Wenjie Xu,
  • Youzhen Xiang and
  • Fucang Zhang

27 August 2023

Leaf area index (LAI) is essential for evaluating crop growth and development. Destructive manual measurement methods mainly achieve traditional crop LAI acquisition. Due to the advantages of being fast and non-destructive, spectroscopy technology pr...

  • Article
  • Open Access
64 Citations
6,770 Views
17 Pages

Estimation of Leaf Area Index and Above-Ground Biomass of Winter Wheat Based on Optimal Spectral Index

  • Zijun Tang,
  • Jinjin Guo,
  • Youzhen Xiang,
  • Xianghui Lu,
  • Qian Wang,
  • Haidong Wang,
  • Minghui Cheng,
  • Han Wang,
  • Xin Wang and
  • Fucang Zhang
  • + 3 authors

21 July 2022

Leaf area index (LAI) and above-ground biomass are both vital indicators for evaluating crop growth and development, while rapid and non-destructive estimation of crop LAI and above-ground biomass is of considerable significance for crop field manage...

  • Review
  • Open Access
24 Citations
8,689 Views
19 Pages

Review of Pharmacokinetics and Pharmacogenetics in Atypical Long-Acting Injectable Antipsychotics

  • Francisco José Toja-Camba,
  • Nerea Gesto-Antelo,
  • Olalla Maroñas,
  • Eduardo Echarri Arrieta,
  • Irene Zarra-Ferro,
  • Miguel González-Barcia,
  • Enrique Bandín-Vilar,
  • Victor Mangas Sanjuan,
  • Fernando Facal and
  • Anxo Fernández-Ferreiro
  • + 3 authors

Over the last two decades, pharmacogenetics and pharmacokinetics have been increasingly used in clinical practice in Psychiatry due to the high variability regarding response and side effects of antipsychotic drugs. Specifically, long-acting injectab...

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