On three-fold irregular branched coverings over closed three-braid and three-bridge knots

AbstractIt is well known that every closed orientable three-manifold is given as a three-fold branched covering space branched over some knot. Then it is an interesting problem that for a given knot family what kind of manifold can be got as a three-fold irregular branched covering space. K. Murasugi showed that for a closed three-braid the manifold is a lens space of type (n,1). In this paper, we will give an another proof and an algorithm to determine n for a given knot. And for a three bridge knot, we will show that its covering space is a lens space of type (p,q), and give an algorithm to determine the pair of p, q

A Study on Evaluation of Healing Level Using Brainwave Stimulated by Tourist Spot Image

Healing is an emotion that even the person himself is hard to notice. In this paper, healing levels of tourist spots are evaluated using brainwaves stimulated by tourist spot images. Healing level is estimated by a ratio of the sum of spectral elements in α waveband to that in β waveband. From an experiment using eight subjects, it is found that tourist spots in white- and gray-colored images are evaluated as being healed since the visual perception of human beings is greatly influenced by color

Terminal fluorinated nitroxide radical liquid crystalline compounds

We have synthesized a new series of all-organic paramagnetic liquid crystalline (LC) compounds, which include a five-membered ring nitroxide radical (NR) moiety in the mesogen core and fluorine atoms as terminal substituents. These new compounds are the structural analogs of the previously reported NR-LC compounds, and showed remarkable fluorine substituent effects. The introducing fluorine atom into terminal unit stabilizes nematic phase. However, an excess of fluorination leads to the destabilization of nematic phase.This is an Accepted Manuscript of an article published by Taylor & Francis in Molecular Crystals and Liquid Crystals on 24 May 2015, available at https://doi.org/10.1080/15421406.2015.1032732

Chiral nitroxide radical with terminal trifluoromethoxy group

This is an Accepted Manuscript of an article published by Taylor & Francis in Liquid Crystals on 9 August 2023, available at https://doi.org/10.1080/02678292.2023.2182923.A new chiral liquid crystalline nitroxide radical with a terminal trifluoromethoxy group exhibits not only chiral nematic and chiral smectic A phases but also a twist grain boundary phase in the cooling process. The layer order induced by the trifluoromethoxy group seems frustrated with the helical order

Impact on permeability due to axial stress disturbances for cretaceous sandy shale

Seismic waves generated from earthquakes and artificial surface vibration might alter the water level in the wells and oil or gas production. These transient stress disturbances prospectively caused the permeability change due to new pathway occurring or existing pathway being cleared. The permeability change might encourage enhancing gas recovery, inducing small earthquakes preventing future large earthquakes, and de-routing underground water flow for various purposes. The prospective permeability increase by axial stress disturbances of Cretaceous sandy shale may effectively expand the capacity of methane gas recovery of Kushiro Coal Mine. The paper observes the permeability change of intact or triaxially fractured Kushiro Cretaceous sandy shale by axial stress disturbances. It will be shown that increasing and decreasing factors might work together on permeability.MMIJ Fall Meeting 2017, Sept. 26-28 2017, Sapporo, Japan （資源・素材2017（札幌）: 平成29年度資源・素材関係学協会合同秋季大会, 2017年9月26日～28日, 北海道大学, 札幌市

Temperature-dependent Color Change of Cholesteric Liquid Crystalline Core-shell Microspheres

We have fabricated water-in-oil-in-water (W/O/W) double emulsion droplets with a cholesteric liquid crystalline (CLC) material, which is a mixture of a nematic liquid crystalline compound, 4-cyano-4′-pentylbiphenyl (5CB), and a chiral dopant, cholesteryl oleyl carbonate (COC), as the middle phase and an aqueous poly(vinylalcohol) (PVA) solution as the inner and outer phases (CLC core-shell microspheres). Here we report the strongly temperature-dependent color change of CLC core-shell microsphere.This is an Accepted Manuscript of an article published by Taylor & Francis in Molecular Crystals and Liquid Crystals on 3 July 2015, available at https://doi.org/10.1080/15421406.2015.1066548

Magnetic properties of terminal iodinated nitroxide radical liquid crystals

We designed and synthesized terminal iodinated nitroxide radical liquid crystalline compounds (NR-LCs) with octyloxy side chain (±)-8-I and dodecyloxy side chain (±)-12-I to understand the substitution effects of an iodine atom on the phase transition behavior and on the magnetic properties in crystalline (Cr), liquid crystalline (LC) and isotropic (Iso) phases. These NR-LCs show monotropic nematic phases because the iodine atom is too short and apolar as a terminal group to stabilize LC phases. Furthermore, the SQUID magnetometry and electron paramagnetic resonance (EPR) spectroscopy indicate that the magnetic properties in the Cr phase depend on the length of the alkoxy side chain; antiferromagnetic interactions occur in (±)-8-I, whereas ferromagnetic interactions occur in (±)-12-I, and the paramagnetic susceptibility of (±)-8-I slightly decreases (J¯0) at each of the Cr-to-Iso phase transitions. These results suggest that the most frequent type of the magnetic interactions in LC and Iso phases is similar to those in the Cr phases among the various types of intermolecular magnetic interactions induced by the inhomogeneous intermolecular contacts.Akita T., Yamazaki T., Uchida Y., et al. Magnetic properties of terminal iodinated nitroxide radical liquid crystals. Polyhedron 136, 79 (2017); https://doi.org/10.1016/j.poly.2017.02.030