Results 61 to 70 of about 29,640 (244)

Partial Identification of Population Average and Quantile Treatment Effects in Observational Data Under Sample Selection

open access: yesJournal of Applied Econometrics, EarlyView.
ABSTRACT This article partially identifies population treatment effects in observational data under both non‐random treatment assignment and sample selection. Bounds are provided for both average and quantile population treatment effects, combining assumptions for the selected and the non‐selected subsamples.
Dimitris Christelis, Julián Messina
wiley   +1 more source

Segment tip geometry of sheet intrusions, I: Theory and numerical models for the role of tip shape in controlling propagation pathways

open access: yesVolcanica, 2021
Inferences about sheet intrusion emplacement mechanisms have been built largely on field observations of intrusion tip zones: magmatic systems that did not grow beyond their observed state.
Richard Walker   +5 more
doaj   +1 more source

Offspring Global DNA Methylation is not Affected by Parental Developmental Stress Experience in a Passerine Species

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
ABSTRACT Rapid phenotypic change may be mediated by intergenerational transmission of early developmental experiences. In birds, exposure to glucocorticoids during early development can alter global DNA methylation and gene expression. However, DNA methylation is labile, and it is currently unclear whether the impacts of stress suffered during juvenile
Anna Miltiadous   +5 more
wiley   +1 more source

Optimization of the Hollow Rectification Sill in the Forebay of the Pump Station Based on the PSO-GP Collaborative Algorithm

open access: yesShock and Vibration, 2021
The layout of the pump station is easily affected by topography, site, and other factors, resulting in poor inlet flow patterns in the forebay, which seriously affect the normal operation of the pump station.
Wang Xi, Weigang Lu, Chuan Wang, Bo Xu
doaj   +1 more source

Elisha Noyes Sill

open access: yes, 2023
Elisha Noyes Sill (1801-1888). Sill was the son of Doctor Elisha N. and Chloe Allyn of Windsor, Connecticut. He settled in Cuyahoga Falls and married Elizabeth Newberry on October 6, 1824.

core  

Superior Labial Artery Flap for Septal Perforation Repair: The Boxer's Flap

open access: yesThe Laryngoscope, EarlyView.
The nasal floor flap, or Boxer's flap, is an anteriorly pedicled, superior labial artery–based mucosal flap that provides excellent closure rates in septal perforation repair when traditional septal flaps are not feasible. The schematic shows: (A) preoperative perforation, (B) nasal floor flap elevation (with the pedicle maintained at the inferior ...
Nicholas J. Campion   +5 more
wiley   +1 more source

Energy dissipation using multi-pendulum sill downstream sluice gate. [PDF]

open access: yesThe Egyptian International Journal of Engineering Sciences and Technology
Many researchers have already investigated different energy dissipator designs both theoretically and empirically in order to maximize energy dissipation and minimize length for the hydraulic jump.
mariam elattar   +3 more
doaj   +1 more source

Depositional and Hydrological Relationships Between Buried Dead Ice and the Active Layer in the McMurdo Dry Valleys, Antarctica: A Study of Sediment Geochemistry and Cation Concentrations

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT The McMurdo Dry Valleys, the largest ice‐free region in Antarctica, are home to a cold‐desert hydrologic system of glaciers, snowbanks, streams, and lakes. Freshwater is also stored as dead glacial ice, which is poorly constrained in terms of ion concentrations and interactions with both in situ and overlying sediments.
Matthew C. Witscheber, Kate M. Swanger
wiley   +1 more source

Relationship of Personality Types and Strategy Choices in Foreign Language Learning

open access: yesDarnioji daugiakalbystė, 2018
Language learning is a comprehensive concept with its components and needs. Because of this reason, it is affected by various subjects, most significant two of which are learner personality and language learning strategy choices of the students.
Mutlu Volkan
doaj   +1 more source

Crash Behavior of DP800–DP1000 Advanced High‐Strength Steel’s Dissimilar Resistance Spot Welded Joints Under Quasi‐static and High Strain Rates

open access: yessteel research international, EarlyView.
The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley   +1 more source

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