A passive false twist unit (spiral) has been developed to assist with the handling lowstrength slivers on a high speed-spinning machine with a high-speed feed. In the first trial, a falsetwist simulator device was constructed to determine whether the passive false twist unit can be usedon high speed feeding with different can distance from the feeding device. In the second trial, theeffects of ...

Abstract: Nanofibers are fibers having nanometric diameters, made from a variety of polymeric materials, generally developed using electrospinning methods. It can incorporate multiple drugs, such as proteins, peptides, antibodies, and small molecules, either loaded inside or adhered to the surface. They offer enormous potential in biomedical field, including drug delivery, regenerative medicine...

Litherland has shown that if a knot is (+)-amphicheiral then its m-twist-spin is reversible. We show that, for classical knots, in many cases the converse holds. The irreversibility (sometimes called noninvertibility) of certain twist-spun knots has been established by Ruberman [10], using the Farber-Levine linking pairing and the Casson-Gordon invariants. More recently, alternative proofs of t...

Hysteresis loops of randomly oriented grains with uniaxial anisotropy were computed on the basis of an array of 27 Wigner Seitz cells representing crystallites which interact by exchange coupling at the grain boundaries. The computed coercivity increases linearly with increasing interatomic exchange. Using the experimental anisotropy and exchange parameters for Sm(FellTi), we found 1.lo&=1.2 T ...

One of the primary goals when studying stellar systems with neutron stars has been to reveal the physical properties of progenitors and understand how neutron star spins and birth kicks are determined. Over the years a consensus understanding had been developed, but recently some of the basic elements of this understanding are being challenged by current observations of some binary systems and ...

We give a short proof inspired by Carter et al [1] that the 2–twist-spun trefoil is not isotopic to its orientation reverse. The proof uses a computer calculation of the third homology group of the three colour rack. We also give a new proof using the same calculation of the well-known fact that the left and right trefoil knots are not isotopic. AMS Classification 57Q45; 57M25, 57M27

To minimize the chance of injury or disease from toxic or infectious substances, laboratory personnel are increasingly confining hazardous techniques to enclosed ventilated work cabinets. T'Ae well established use of the fume hood for chemistry has been extended to other laboratory sciences. The Atomic Energy Commission has been particularly active in this progress. The bacteriologist has recen...

We show that the smooth homotopy 4-sphere obtained by Gluck twisting m-twist n-roll spin of any unknotting number one knot is diffeomorphic to standard 4-sphere, for pair integers (m,n). It follows as a corollary an infinite collection twisted doubles Gompf's order corks are standard.