Numerical study of magnetoresistance for currents perpendicular to planes in spring ferromagnets

Magnetoresistance (MR) for currents perpendicular to planes is calculated within the ballistic limit for spring ferromagnets in which an artificial domain wall is formed by the external magnetic fields. We consider two contributions to the MR: one is caused by a twisting of the magnetization and the other is due to a mismatch of the electronic structure between the two ferromagnets comprising the spring ferromagnets. We show that the resulting MR may show a nonmonotonic dependence on the width of the domain walls and can be either positive or negative according to the magnitude of these two contributions. We further show that oscillatory behavior appears in the MR when the soft ferromagnet is sandwiched between hard ferromagnets.journal articl

第04号

一般雑誌記事 / Articlearticl

<Original Article> Surgical Management of Atherosclerotic Aneurysms of the Distal Aortic Arch Using a Temporary Bypass Graft Method

We report a unique method for the repair of atherosclerotic aneurysms of the distal aortic arch and the surgical results of this method. During the past 10 years, 34 patients have undergone repair of distal aortic arch aneurysms using temporary bypass graft at our institution; 31 elective procedures and 3 emergency procedures were performed. During aortic occlusion, distal perfusion was maintained through a temporary bypass which was usually created between the right axillary artery and the left external iliac artery. In 31 patients, aneurysms were repaired via left thoracotomy at the 4th intercostal space, and in the remaining 3 patients, a median sternotomy wifh left thoracotomy was used to approach the aneurysm because the aneurysm was in proximity to the orifice of the left common carotid artery. The aortic aneurysm was repaired by tube grafting in 29 patients, and by patch grafting in 5 patients. The mean ratio of lower extremity blood pressure to radial artery pressure during aortic occlusion was 0.69 (SE 0.19) in patients with temporary bypass using low porosity woven 14 mm Dacron grafts, and 0.86 (SE 0.09) in patients with the bypass using 16 mm knitted Dacron grafts (p<0.05). Postoperative complications included thalamic bleeding in 1 patient, pneumonia in 5 patients, acute renal failure in 1 patient, and paraplegia in 2 patients. Early surgical mortality within 30 postoperative days was 2.9% (n=1) and in-hospital mortality was 8.8% (n=3). The cause of early postoperative death was graft infection subsequent to postoperative pneumonia. The surgical results from temporary bypass grafts are comparable to results obtained with cardiopulmonary bypass reported in the recent Japanese literature.journal articl

Karyograms in a Long-Term Cultured Cell Line Derived From Rabbit Lens Epitherial Tissues

Article信州医学雑誌 18(2): 369-374(1969)journal articl

Improved measurement of CP-violation parameters sin⁡2ϕ1 and |λ|, B meson lifetimes, and B0-B̅0 mixing parameter Δmd

journal articl

Preparation and Reactions of Masked Allylic Organozinc Reagents

Allylic zinc reagents have been prepared from sterically hindered homoallylic alcohols 10 and 13, using a novel fragmentation reaction of the corresponding zinc alkoxide, without any homocoupling products. These allylic zinc reagents react with a range of electrophiles in good to excellent yields. Substituted allylic zinc reagents have also been prepared in this manner. α-Substituted homoallylic alcohols 37, 46, and 51 give solely α-substituted products after the fragmentation−allylation sequence; these products are obtained not only regioselectively but also with extremely high anti diastereoselectivity. Likewise, γ-substituted homoallylic alcohols 57 and 58, undergo the fragmentation−allylation reaction to give γ-substituted products. The reaction has also been demonstrated to be catalytic in zinc salts

Underlying data for a 100% organic conversion study

Underlying data for ‘Greenhouse gas impacts of converting all farming in England and Wales to organic methods’ by L.G. Smith et al. (2019). We apply a bespoke model to estimate levels of production from agriculture in England and Wales under organic management. Outputs are compared to the real-world distribution of conventional production in 2010, derived from a range of industry sources. The environmental impacts of the organic production scenario are assessed through an application of the Cranfield Agri-LCA models together with country-specific estimates of GHG emissions from Land Use Change (LUC) and carbon sequestration estimates </div

Experimental characterisation of holographic optical traps for microbubbles

In this study microscopic gas bubbles (7-12 µm diameter) suspended in water were optically trapped in a custom-built microfluidic slide using holographically generated Laguerre-Gaussian (‘doughnut’) beam optical tweezers. The optical potential was then characterized as a function of bubble size, trapping laser power and trapping beam diameter (Laguerre-Gaussian beam mode) using the trap spring constant in the plane transverse to the beam propagation direction, obtained from the position fluctuations of the bubble in the trap measured by video microscopy and particle tracking. It was found that microbubbles were held at the equilibrium position of buoyant and optical forces at a distance from the focus of the beam that increased with laser power, and that optical trapping in this configuration was only possible within a specific range of trap and bubble parameters. Furthermore an optimum size of the doughnut beam to microbubble diameter which maximized the transverse spring constant was found . A ray optics model of the optical forces acting on microbubbles in a focused Laguerre-Gaussian beam was used in order to calculate the trap spring constants and equilibrium trapping position as a function of the different parameters, and highlight key physical behaviours

Sub-daily sea-level pressure series for London (GB), Paris (FR) and De Bilt (NL)

Subdaily, homogenized sea-level pressure data series for London (GB), Paris (FR) and De Bilt (NL) that extend back to the years 1692, 1748 and 1743 respectively.The data are in ASCII format. The sub-daily data files are provided in the Copernicus Date Rescue Service Station Exchange Format (SEF). Monthly means calculated from the sub-daily values are also included in this dataset, along with updated monthly, seasonal and annual resolution Paris-London Westerly Indices; these data are provided as comma-separated files.Information on reading the SEF data can be found here: https://datarescue.climate.copernicus.eu/st_formatting-land-stationsUPDATESThe most up-to-date versions of the data are available from here: https://github.com/rcornes/LPD_SLPThose updates are sporadically copied to this repository.</p