Results 71 to 80 of about 198,844 (286)

Installation Direction Design and Construction Control of Sliding Bearing of Continuous Girder Bridge

open access: yesZhongwai Gonglu
Continuous girder bridges can improve the structural stress, increase the structural bearing capacity, and promote ride comfort. However, some continuous girder bridges suffer from issues such as bearing dislocation, upper torsion, and damage to seismic ...
GUAN Changlu   +3 more
doaj   +1 more source

Analysis of material, social, and moral governance in natural resource management in southern Namibia

open access: yesInternational Journal of the Commons, 2012
In southern Namibia ineffective enforcement contributes to natural resource degradation. We analyse the root causes of ineffective enforcement applying diverse methods.
Thomas Falk, Bjoern Vollan, Michael Kirk
doaj   +1 more source

Mechanical Properties of Architected Polymer Lattice Materials: A Comparative Study of Additive Manufacturing and CAD Using FEM and µ‐CT

open access: yesAdvanced Functional Materials, EarlyView.
This study examines how pore shape and manufacturing‐induced deviations affect the mechanical properties of 3D‐printed lattice materials with constant porosity. Combining µ‐CT analysis, FEM, and compression testing, the authors show that structural imperfections reduce stiffness and strength, while bulk material inhomogeneities probably enhance ...
Oliver Walker   +5 more
wiley   +1 more source

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

open access: yesAdvanced Functional Materials, EarlyView.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda   +11 more
wiley   +1 more source

Envisioning the future: Police and public health joining forces

open access: yesJournal of Community Safety and Well-Being, 2020
Marc Krupanski   +5 more
doaj   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

open access: yesAdvanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Experience of the Europol cooperation

open access: yesBelügyi Szemle
Aim: The aim of the article is to present the practical experience of cooperation between Europol, which plays a key role in international criminal cooperation, and Hungary.
Dániel Vetter
doaj   +1 more source

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

open access: yesAdvanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker   +6 more
wiley   +1 more source

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