نتایج جستجو برای: lai

تعداد نتایج: 4952  

2001
K. SOUDANI K. Soudani

In order to assess the contribution of each layer to eVective leaf area index (LAI) in stratiŽ ed forest canopies, two Scots pine stands were selected in Haguenau forest, Alsace, France. One stand, 80 years old, had a sparse tree layer and a dense herb layer. The other stand, 50 years old, had a closed tree layer and dense herb and shrub layers. Hemispherical photographs, taken at 10-metre inte...

Journal: :Tree physiology 2003
Kirk R Wythers Peter B Reich David P Turner

Leaf area index (LAI) is a key biophysical variable in most process-based forest-ecosystem models. However, most such models require LAI as an input, typically obtained from empirical observations. We tested whether scaling principles based on trade-offs between single leaf and canopy properties could be effectively used to model LAI, thereby obviating the need for empirical observations. To do...

2013
Paul Geerts Guadalupe Martinez Andreas Schreiner

BACKGROUND Discontinuation of antipsychotic treatment for schizophrenia can interrupt improvement and exacerbate the illness. Reasons for discontinuing treatment are multifactorial and include adherence, efficacy and tolerability issues. Poor adherence may be addressed through non-pharmacological approaches as well as through pharmacological ones, ie ensured delivery of medication, such as that...

2007
Rasmus Houborg Eva Boegh

Reflectance data in the green, red and near-infrared wavelength region were acquired by the SPOT high resolution visible and geometric imaging instruments for an agricultural area in Denmark (56°N, 9°E) for the purpose of estimating leaf chlorophyll content (Cab) and green leaf area index (LAI). SPOT reflectance observations were atmospherically corrected using aerosol data from MODIS and profi...

Journal: :Psychological medicine 2017
R Patel E Chesney M Taylor D Taylor P McGuire

BACKGROUND Paliperidone palmitate is one of the most widely prescribed long-acting injectable (LAI) antipsychotics in the UK. However, it is relatively expensive and there are few data comparing its effectiveness to that of other LAI antipsychotics. We sought to address this issue by analyzing a large anonymized electronic health record (EHR) dataset from patients treated with LAI antipsychotic...

Journal: :European neuropsychopharmacology : the journal of the European College of Neuropsychopharmacology 2012
Eduard Vieta Stuart Montgomery Ahmad Hatim Sulaiman Rodrigo Cordoba Benedicte Huberlant Lupe Martinez Andreas Schreiner

The efficacy and safety of risperidone long-acting injectable (LAI) for preventing recurrence of mood episodes in patients with bipolar I disorder was evaluated in a randomized, placebo-controlled study. After a 12-week open-label period with risperidone LAI (n=560), patients who did not experience a recurrence entered an 18-month randomized, double-blind period with risperidone LAI (n=132) or ...

Journal: :Remote Sensing 2014
Xinchuan Li Youjing Zhang Yansong Bao Juhua Luo Xiuliang Jin Xingang Xu Xiaoyu Song Guijun Yang

The use of spectral features to estimate leaf area index (LAI) is generally considered a challenging task for hyperspectral data. In this study, the hyperspectral reflectance of winter wheat was selected to optimize the selection of spectral features and to evaluate their performance in modeling LAI at various growth stages during 2008 and 2009. We extracted hyperspectral features using differe...

Journal: :Blood 1980
T Olofsson I Olsson

To determine if normal granulopoiesis can be suppressed by substances produced by cells from patients with leukemia. conditioned media from such cells were assayed for their ability to reduce the fraction of normal CFU-c in S-phase or inhibit cluster/colony formation in agar cultures. Low-density (<1 .077 g/ml) marrow or blood cells from patients with leukemia. but not from normals. were shown ...

Journal: :Remote Sensing 2015
Manuel J. Mayr Cyrus Samimi

The Leaf Area Index (LAI) is one of the most frequently applied measures to characterize vegetation and its dynamics and functions with remote sensing. Satellite missions, such as NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) operationally produce global datasets of LAI. Due to their role as an input to large-scale modeling activities, evaluation and verification of such datasets...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2000
Yu Zhang Yuhong Tian Yuri Knyazikhin John V. Martonchik David J. Diner Marc Leroy Ranga B. Myneni

The multi-angle imaging spectroradiometer (MISR) instrument is designed to provide global imagery at nine discrete viewing angles and four visible/near-infrared spectral bands. The MISR standard products include vegetation canopy green leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR). These products are produced using a peer-reviewed algori...

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