Dislocations are crucial to plastic deformation in crystals. At extreme strain rates, their motion shifts from thermally activated glide ballistic transport, causing significant drag due interactions with phonons, which can lead embrittlement and failure metals. The concept of dislons, quantized dislocations, has emerged better understand these types interactions. Similar quantum treatment dislocation-electron interactions, confining dislocations nanometer scales, especially nanocrystalline...

Supersonic impact of metallic microparticles onto substrates generates extreme interfacial deformation and high contact pressures, enabling solid-state bonding. Although higher velocities are generally believed to improve bond quality mechanical properties in materials formed by supersonic deposition, here we report a peak strength for single microparticle bonding, followed decline at velocities. Our situ micromechanical measurements Al bonded reveal three-fold increase from the critical...

Solid-state bonding can form when metallic microparticles impact substrates at supersonic velocities. While the conditions necessary for impact-induced are relatively well understood, properties emerging bonded interfaces remain elusive. Here, we use in situ microparticle experiments followed by site-specific micromechanical measurements to study interfacial strength across interfaces. We reveal a gradient of bond starting with weak near center, rapid twofold rise peak significantly higher...

Surface oxide layer fracture and the subsequent exposure of clean metallic surfaces are critical in various solid-state processes for powder consolidation additive manufacturing. We resolve this process in-situ by deforming individual spherical particles inside a scanning electron microscope. reveal three modalities, i.e., meridian, radial, circumferential cracking that sequentially activate with particle flattening. Real time measurements load displacement upon flattening also significant...

Abstract This paper examines whether foreign investors (FIs) affect the information production of analysts. Based on China's stock market, we find that FIs significantly reduce analysts’ coverage. Such negative association is more pronounced in firms with a high level governance and disclosure varies analyst characteristics. We also identify two possible economic mechanisms: channel channel. Further tests suggest as crowd out analysts, number research reports brokerage site visits decreased,...

A versatile capacitive tactile sensor based on transparent flexible materials is developed in a simple and low-cost fabrication process. The shows an excellent sensitivity (S=2.05 N-1), highly sensitive to the load as low about 3 mN. Moreover, it exhibits prominent resolution. device performance attributed creative design of polydimethylsiloxane (PDMS) polymer layer, used structural material sensor, which each sensing section acting unit concave square with hemispheric micro-structured PDMS...

A hierarchical optimization strategy is proposed to optimally design constrained layer damping materials patched on the base plate for minimizing sound radiation power. model established by taking positions and thicknesses of as variables, added mass constraints. The procedure implemented, in which evolutionary structural method employed get optimal position layouts materials, genetic algorithm used find thickness configurations with initial structure. Two power sensitivities are formulated...

Abstract The deformation behavior of particles plays a significant role in achieving adhesion during cold spray. the is associated with fracture oxide layer and recrystallization, which are key elements quality Studies particle compression have been made to understand particle. However, under controlled load precise high strain rate yet be studied. Here, we show pattern recrystallization regime rate. We found that cracks initially appeared on equator propagated towards edge top surface....

In iron-based superconductors (FeSCs), the interplay between electronic nematicity and superconductivity is essential for understanding exotic superconducting ground state. nematic regime, uniaxial-strain ($\varepsilon$) tuning of transition temperature $T_c$ [$\Delta T_c(\varepsilon)=\alpha\varepsilon+\beta\varepsilon^2$] offers a unique approach to investigating evolution pairing symmetry if both $s$ $d$ wave instabilities are relevant. Here, we employ uniaxial strain tune {\FSS}, in which...

Culture-led regeneration projects (CRPs) have been identified as an effective means for enhancing the sustainable development of cities. Related topics investigated; however, relatively little information is known about what factors are critical achieving success in these kinds projects. Based on a literature review and five case studies, this study contributes to body knowledge by identifying 25 (CSFs) managing CRPs China. A questionnaire survey was designed evaluate relative importance...

Aiming at the application of multi-target passive tracking, a new multi -target tracking method based on three array fusion and particle fitler was proposed. Firstly, "fake points" could be almost entirely exactly deleted with aids three-array expense an additional array. Secondly, considered fact that measurements gotten from each were independent in system, novel sequential filter improved distribution proposed, influence non-linear non-Gauss eliminated by presented method. The relative...

This study examines whether foreign investors affect the information production of analysts. Based on China’s stock market, we find that significantly reduce analysts' coverage. Such negative association is more pronounced in firms with a high level governance and disclosure varies analyst characteristics. Further tests suggest as crowd out analysts, number research reports brokerage' site visit fell, but forecast accuracy improved, indicating demand supply are generally equilibrium. We...