Results 111 to 120 of about 5,357,439 (379)

Using Matching, Instrumental Variables and Control Functions to Estimate Economic Choice Models [PDF]

open access: yes
This paper investigates four topics. (1) It examines the different roles played by the propensity score (probability of selection) in matching, instrumental variable and control functions methods.
James J. Heckman   +1 more
core  

Laboratory test for EPB tunnelling assessment:results of test campaign on two different granular soils [PDF]

open access: yes, 2011
Earth Pressure Balanced shields are currently the most utilized tunnelling machines throughout around the world. The possibility of using conditioning agents that change the mechanical and hydraulic behaviour of a soil, changing it into a plastic paste ...
Borio, Luca, Peila, Daniele
core  

An intracellular transporter mitigates the CO2‐induced decline in iron content in Arabidopsis shoots

open access: yesFEBS Letters, EarlyView.
This study identifies a gene encoding a transmembrane protein, MIC, which contributes to the reduction of shoot Fe content observed in plants under elevated CO2. MIC is a putative Fe transporter localized to the Golgi and endosomal compartments. Its post‐translational regulation in roots may represent a potential target for improving plant nutrition ...
Timothy Mozzanino   +7 more
wiley   +1 more source

Learning-Related Synaptic Reconfiguration in Hippocampal Networks: Memory Storage or Waveguide Tuning?

open access: yesAIMS Neuroscience, 2015
A fundamental assumption of current hypotheses regarding hippocampal involvement in memory formation is that changes in synaptic connections between hippocampal neurons serve to encode information about recent events.
Eduardo Mercado III
doaj   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

open access: yesFEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo   +2 more
wiley   +1 more source

On the Aitken–Hotelling–Duncan Formula: Brief History, Direct Derivations, and Effective Conditioning

open access: yesMathematics
In the first part of this paper, we examine historical documents related to the well-known Sherman–Morrison–Woodbury (SMW) formula and suggest that Aitken–Hotelling–Duncan (AHD) is an appropriate name for the same formula.
Yunkai Zhou
doaj   +1 more source

Initial conditioning of Polymer Eelectrolyte Membrane fuel cell by temperature and potential cycling

open access: yesActa Chimica Slovenica, 2014
Polymer electrolyte membrane fuel cells need initial conditioning, activation or break-in the first time they are operated after being assembled. During this period performance of the fuel cell improves until it reaches its nominal performance. The exact
Dario Bezmalinović   +2 more
doaj   +1 more source

Heat tube device [PDF]

open access: yes, 1990
The present invention discloses a heat tube device through which a working fluid can be circulated to transfer heat to air in a conventional air conditioning system.
Khattar, Mukesh K.
core   +1 more source

Hematopoietic (stem) cells—The elixir of life?

open access: yesFEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo   +4 more
wiley   +1 more source

INTERFACE ADAPTATION DESIGN FOR EXTRACELLULAR RECORDINGS FROM EXCITABLE TISSUE

open access: yesJournal of Engineering Science (Chişinău)
For a clear and almost exhaustive perspective on the physiology of living organisms, it is important to use the best method to sample the signal and to process it correctly, without affecting the content of information.
OANCEA, Constantin-Daniel
doaj   +1 more source

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