Results 41 to 50 of about 208,045 (268)

Variabilidade espacial da densidade do solo sob manejo da irrigação Spatial variability of the soil density in the irrigation management

Ciência e Agrotecnologia, 2005
Este trabalho foi desenvolvido em um solo aluvial na Estação Experimental da Embrapa Algodão, município de Souza, Estado da Paraíba, Brasil, com o objetivo de estudar a variabilidade espacial da densidade do solo.
Antônio Ricardo Santos de Andrade, Ivan Amaral Guerrini, Carlos Jesús Baca Garcia, Ioeschua Katez, Hugo Orlando Carvallo Guerra   +4 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Geographically Heterogeneous Spatial Inequality in the People’s Republic of China: A Luminosity-Based Analysis of Prefectural Cities and Counties

Asian Development Review
This study examines regional income and inequality in the People’s Republic of China from 2001 to 2020 using high-quality nighttime light (NTL) data to help proxy for the gross domestic product (GDP).
YILIN CHEN
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

SPATIAL DEPENDENCE IN OPTION OBSERVATION ERRORS

Econometric Theory, 2020
In this paper, we develop the first formal nonparametric test for whether the observation errors in option panels display spatial dependence. The panel consists of options with different strikes and tenors written on a given underlying asset. The asymptotic design is of the infill type—the mesh of the strike grid for the observed options shrinks ...
Andersen, Torben G., Fusari, Nicola, Todorov, Viktor, Varneskov, Rasmus T.   +3 more
openaire   +3 more sources

REDUCTION OF SAMPLE SIZE IN THE ANALYSIS OF SPATIAL VARIABILITY OF NONSTATIONARY SOIL CHEMICAL ATTRIBUTES [PDF]

Engenharia Agrícola, 2019
In the study of spatial variability of soil attributes, it is essential to define a sampling plan with adequate sample size. This study aimed to evaluate, through simulated data, the influence of parameters of the geostatistical model and sampling ...
Tamara C. Maltauro, Luciana P. C. Guedes, Miguel A. Uribe-Opazo   +2 more
doaj   +1 more source

Impacts of Max-Stable Process Areal Exceedance Calculations to Study Area Sampling Density, Surface Network Precipitation Gage Extent and Density, and Model Fitting Method

Hydrology, 2023
Max-stable process (MSP) models can be fit to data collected over a spatial domain to estimate areal-based exceedances while accounting for spatial dependence in extremes. They have theoretical grounding within the framework of extreme value theory (EVT).
Brian Skahill, Cole Haden Smith, Brook T. Russell, John F. England   +3 more
doaj   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Spatial Dependence in the Cyclical Sensitivity of Labour Supply: An Analysis at the Regional Level in Ecuador

Economies
The labour supply has historically been subject to influence from the economic cycle. On the other hand, there is a paucity of research in the Latin American region examining the impact of social factors on labour participation in diverse contexts.
Ángel Maridueña-Larrea, Ángel Martín-Román   +1 more
doaj   +1 more source

Heteroskedasticity of Unknown Form in Spatial Autoregressive Models with a Moving Average Disturbance Term

Econometrics, 2015
In this study, I investigate the necessary condition for the consistency of the maximum likelihood estimator (MLE) of spatial models with a spatial moving average process in the disturbance term.
Osman Doğan
doaj   +1 more source