Results 31 to 40 of about 730,516 (311)

The deposition of miniature weaponry in Iron Age Lincolnshire

open access: yesPallas, 2011
To appreciate the significance of miniatures, we must remove them from the category of archaeological curiosities and return them to their wider social and landscape contexts.
Julia Farley
doaj   +1 more source

The effects of environmental and classroom noise on the academic attainments of primary school children [PDF]

open access: yes, 2008
While at school children are exposed to various types of noise including external, environmental noise and noise generated within the classroom. Previous research has shown that noise has detrimental effects upon children?s performance at school ...
Dockrell, Julie, Shield, Bridget
core   +1 more source

Mechanisms of IgE‐mediated food allergy and the role of allergen‐specific B cells

open access: yesFEBS Letters, EarlyView.
Food allergy arises when allergen‐specific B cells preferentially produce immunoglobulin E (IgE) antibodies against harmless foods. This article explains the mechanisms driving IgE‐mediated reactions, highlights the central role of these B cells, and discusses how natural tolerance (NT) and oral immunotherapy (OIT) can reshape allergic immune responses.
Juan‐Felipe López   +2 more
wiley   +1 more source

Development and Application of Mechanical Shield Tail Clearance Measurement Device Based on Angle Sensor

open access: yesChengshi guidao jiaotong yanjiu
Objective In view of the constant changes of shield tail clearance during shield or tunnel boring machine excavation process, to ensure construction safety, it is necessary to measure shield tail clearance in real-time. Addressing the shortcomings of non-
WANG Wei   +4 more
doaj   +1 more source

Sound shield [PDF]

open access: yes, 1982
An improved test section for a supersonic or hypersonic wind tunnel is disclosed wherein the model tested is shielded from the noise normally radiated by the turbulent tunnel wall boundary layer.
Beckwith, I. E., Creel, T. R., Jr.
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

Experimental Study on Slurry Improvement and Gushing Control in Water-rich Silty Fine Sand Layers

open access: yesChengshi guidao jiaotong yanjiu
[Objective] During EPB (earth pressure balance) shield tunneling through the water-rich silty fine sand layers, the ground is characterized by high friction, poor flow plasticity, and strong permeability.
GUO Shiqing   +6 more
doaj   +1 more source

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

open access: yesApplied Sciences, 2019
Shield tunneling under rivers often requires monitoring riverbed deformations in near real-time. However, it is challenging to measure riverbed deformation with conventional survey techniques.
Wen Guo   +9 more
doaj   +1 more source

Theoretical Investigation of Fast Neutron and Gamma Radiation Properties of Polycarbonate-Bismuth Oxide Composites Using Geant4

open access: yesNanomaterials, 2022
The gamma mass (µm) and linear (µ) attenuation coefficients of polycarbonate-bismuth oxide composites (PC-Bi2O3) with different bismuth oxide weight factors were investigated theoretically using EpiXS and a Monte Carlo simulation-based toolkit and Geant4
Hanan Akhdar
doaj   +1 more source

Sun shield [PDF]

open access: yes, 1987
A shading device which is capable of compactly storing a flexible shade on a biased, window shade type spring roller is disclosed. It is controlled to deliver the shade selectively to either its operative shading or compact storage ...
Derespinis, Silvio F.   +2 more
core   +1 more source

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