Results 11 to 20 of about 245,585 (258)

Microbiological and Nutritional Analysis of Lettuce Crops Grown on the International Space Station

open access: yesFrontiers in Plant Science, 2020
The ability to grow safe, fresh food to supplement packaged foods of astronauts in space has been an important goal for NASA. Food crops grown in space experience different environmental conditions than plants grown on Earth (e.g., reduced gravity ...
Christina L. M. Khodadad   +8 more
doaj   +1 more source

Evaluating the lettuce metatranscriptome with MinION sequencing for future spaceflight food production applications

open access: yesnpj Microgravity, 2021
Healthy plants are vital for successful, long-duration missions in space, as they provide the crew with life support, food production, and psychological benefits.
Natasha J. Haveman   +6 more
doaj   +1 more source

Stable Anatomy Detection in Multimodal Imaging Through Sparse Group Regularization: A Comparative Study of Iron Accumulation in the Aging Brain

open access: yesFrontiers in Human Neuroscience, 2021
Multimodal neuroimaging provides a rich source of data for identifying brain regions associated with disease progression and aging. However, present studies still typically analyze modalities separately or aggregate voxel-wise measurements and analyses ...
Matthew Pietrosanu   +7 more
doaj   +1 more source

Development and Validation of a Radiosensitivity Prediction Model for Lower Grade Glioma Based on Spike-and-Slab Lasso

open access: yesFrontiers in Oncology, 2021
Background and PurposeLower grade glioma (LGG) is one of the leading causes of death world worldwide. We attempted to develop and validate a radiosensitivity model for predicting the survival of lower grade glioma by using spike-and-slab lasso Cox model ...
Zixuan Du   +12 more
doaj   +1 more source

Vegetation Change and Its Response to Climate Extremes in the Arid Region of Northwest China

open access: yesRemote Sensing, 2021
Changes in climate extremes have a profound impact on vegetation growth. In this study, we employed the Moderate Resolution Imaging Spectroradiometer (MODIS) and a recently published climate extremes dataset (HadEX3) to study the temporal and spatial ...
Simeng Wang, Qihang Liu, Chang Huang
doaj   +1 more source

Evaluación tecnológica explotativa del motocultor Dongfeng DF 151L en preparación de suelo para sembrar maíz

open access: yesLa Técnica: Revista de las Agrociencias, 2020
Exploitative technological evaluation of the Dongfeng DF 151L motor cultivator in soil preparation for sowing maize Resumen La presente investigación se realizó en la “Finca Juanito”, coordenadas 1o19’46’’ LS y 80o35’3’’ LO, cantón Jipijapa ...
Byron Leonardo Quimís Guerrido   +4 more
doaj   +1 more source

Omitted variable bias of Lasso-based inference methods: A finite sample analysis

open access: yes, 2021
We study the finite sample behavior of Lasso-based inference methods such as post double Lasso and debiased Lasso. We show that these methods can exhibit substantial omitted variable biases (OVBs) due to Lasso not selecting relevant controls.
Wuthrich, Kaspar, Zhu, Ying
core   +1 more source

Using Genetic Risk Score Approaches to Infer Whether an Environmental Factor Attenuates or Exacerbates the Adverse Influence of a Candidate Gene

open access: yesFrontiers in Genetics, 2020
Some candidate genes have been robustly reported to be associated with complex traits, such as the fat mass and obesity-associated (FTO) gene on body mass index (BMI), and the fibroblast growth factor 5 (FGF5) gene on blood pressure levels.
Wan-Yu Lin   +10 more
doaj   +1 more source

Twenty-Four-Hour Ahead Probabilistic Global Horizontal Irradiance Forecasting Using Gaussian Process Regression

open access: yesAlgorithms, 2021
Probabilistic solar power forecasting has been critical in Southern Africa because of major shortages of power due to climatic changes and other factors over the past decade. This paper discusses Gaussian process regression (GPR) coupled with core vector
Edina Chandiwana   +2 more
doaj   +1 more source

Least squares after model selection in high-dimensional sparse models [PDF]

open access: yes, 2013
In this article we study post-model selection estimators that apply ordinary least squares (OLS) to the model selected by first-step penalized estimators, typically Lasso.
Belloni, Alexandre, Chernozhukov, Victor
core   +2 more sources

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