Theories that spontaneously break Lorentz invariance also violate diffeomorphism symmetries, implying the existence of extra degrees of freedom and modifications of gravity. In the minimal model (“ghost condensation”) with only a single extra degree of freedom at low energies, the scale of Lorentz violation cannot be larger than about M ∼ 100 GeV due to an infrared instability in the gravity se...

Atomic force microscopy (AFM) offers unparalleled insight into structure and material functionality across nanometer length scales. However, the spatial resolution afforded by the AFM tip is counterpoised by slow detection speeds compared to other common microscopy techniques (e.g., optical, scanning electron microscopy, etc.). In this work, we develop an ultrafast AFM imaging approach allowing...

We show how a new hidden gauge symmetry responsible for neutrino mass as well dark matter in the Universe can be discovered through scalar mediators breaking symmetry. The force mediator (${Z}^{\ensuremath{'}}$) may lighter than Standard Model bosons but cannot observed traditional searches bosons. highlight novel way of discovering such at Large Hadron Collider by incorporating an existing ATL...

As a hybrid between a hypodermic needle and transdermal patch, we have used microfabrication technology to make arrays of micron-scale needles that transport drugs and other compounds across the skin without causing pain. However, not all microneedle geometries are able to insert into skin at reasonable forces and without breaking. In this study, we experimentally measured and theoretically mod...

During the past decade, the United States military has supported continuous deployments of forces around the world, often on very short notice and for prolonged duration, to meet the needs of a wide range of peacekeeping and humanitarian missions or major contingency operations. These deployments have come from a smaller force based closer to home. The pattern of varied and fast-breaking region...

Strong mechanical forces can, obviously, disrupt cell-cell and cell-matrix adhesions, e.g., cyclic uniaxial stretch induces instability of cell adhesion, which then causes the reorientation of cells away from the stretching direction. However, recent experiments also demonstrated the existence of force dependent adhesion growth (rather than dissociation). To provide a quantitative explanation f...

We investigate what it takes for the axion to address strong $CP$ problem in presence of explicit Peccei-Quinn symmetry breaking effects besides interaction. In cases where Peccei-Quinn-Higgsing scalar field directly couples Standard Model sector, is pointed out that existing fifth force experiments can set better constraints on quality over neutron electric dipole moment.

The study is aimed to investigate physical and mechanical properties of fibres extracted from sansevieria ehrenbergii plant its quality for different textile products such ropes, carpets fabrics in order enhance commercialization utilization the plant. SEF were by means hand decortication leaves determined. Analysis showed that flexible, smooth with mean length 138.48 cm, maximum breaking force...

Single asperity friction experiments using atomic force microscopy (AFM) have been conducted on chemical vapor deposited (CVD) graphene grown on polycrystalline copper foils. Graphene substantially lowers the friction force experienced by the sliding asperity of a silicon AFM tip compared to the surrounding oxidized copper surface by a factor ranging from 1.5 to 7 over loads from the adhesive m...