Results 101 to 110 of about 275,376 (307)

Evaluation of the Spherical Flange Concept for a Rocket Engine [PDF]

, 2003
Due to the inherent tolerance variability of hardware, flange misalignments occur during installation of mating components for a liquid propellant rocket engine. Flange misalignments include axial, lateral, and angular offsets. If these misalignments are
Nichols, Jay, Stangeland, Maynard L., Tygielski, Philip, Urquidi, Ronald   +3 more
core   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Numerical Investigation of the Influence of Geometric Features and Weld Metal Properties on Stress and Strain States in X80 Girth Welds

Metals
In the design and integrity assessment of long-distance natural gas pipelines, it is critical to assess how geometrical features and material properties influence the stress and strain states of girth welds.
Baichen Guo, Caiyan Deng, Baoming Gong, Yong Liu, Jiaao Ning, Ke Zhang   +5 more
doaj   +1 more source

Endogenous Growth in an Open Economy and the Real Exchange Rate [PDF]

This paper is a step in the direction of a larger research project aimed at determining the long run equilibrium value of the euro/dollar real exchange rate.
Daniela Federici, Giancarlo Gandolfo
core  

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source

Design and Analysis of a Three-Coil Topology for WPT Applications

IEEE Access
In conventional three-coil topologies, when the mutual inductance between the primary and receiver coils is designed to be nonzero, misalignment causes the system to lose its constant output characteristics and degrades overall performance.
Amran Hossain, Peyman Darvish, Weidong Xiao, Saad Mekhilef   +3 more
doaj   +1 more source

Admittance Selection for Force-guided Assembly of Polyhedral Parts in Single-point Contact [PDF]

, 2004
The selection of the proper admittance is important in achieving force-guided assembly. This paper identifies procedures for selecting the appropriate spatial admittance to achieve reliable force-guided assembly of polyhedral parts for single-point ...
Huang, Shuguang, Schimmels, Joseph M.
core   +1 more source

Evidence for Itinerant Ferromagnetic Flat Bands Producing Large Transverse Responses

Advanced Materials, EarlyView.
Itinerant ferromagnetic flat bands are demonstrated in GdCo5 with a high Curie temperature of 940K, a stacked honeycomb–kagome lattice, through angle‐resolved photoemission spectroscopy and magneto‐thermoelectric measurements. These topological flat bands generate large Berry curvaturte, producing gigantic anomalous Nernst effect with record‐high ...
Susumu Minami, Yangming Wang, Seigo Souma, Hiroto Nakamura, Akito Sakai, Takumi Osumi, Hang Su, Hikaru Watanabe, Shun'ichiro Kurosawa, Rikuto Oiwa, Daisuke Nishio‐Hamane, Kosuke Nakayama, Takuya Nomoto, Ryotaro Arita, Takafumi Sato, Satoru Nakatsuji   +15 more
wiley   +1 more source

Misalignment-Induced Aberration Compensation for Off-Axis Reflective Telescopes Based on Fusion of Spot Images and Zernike Coefficients

Photonics
Off-axis reflective telescopes are prone to component misalignment due to external environmental factors and mechanical vibrations. This misalignment introduces low-order aberrations, which severely degrade imaging quality.
Wei Tang, Yujia Liu, Weihua Tang, Jie Fu, Siheng Tian, Yongmei Huang   +5 more
doaj   +1 more source

Admittance Selection for Planar Force-Guided Assembly for Single-Point Contact with Friction [PDF]

, 2003
This paper identifies procedures for selecting the appropriate admittance to achieve reliable planar force-guided assembly for single-point frictional contact cases. A set of conditions that are imposed on the admittance matrix is presented.
Huang, Shuguang, Schimmels, Joseph M.
core   +1 more source