696 research outputs found
Automation of space charge measurement by using LIPP technique
No full textThis paper reports on a modified Laser Induced Pressure Pulse (LIPP) system capable of measuring space charge activities inside dielectric materials subjected to both dc and 50 Hz ac electric stress automatically. Utilising the combination of hardware and software, this LIPP system enables the user to specify the number and duration of successive space charge measurements within a period of time. Some experimental results of space charge under dc and 50 Hz ac conditions will also be presented to demonstrate the validity of the system
Ankaflavin from Monascus-fermented red rice exhibits selective cytotoxic effect and induces cell death on Hep G2 cells.
No full textStudy of Ho-doped Bi2Te3 topological insulator thin films
No full textThis publication arises from research funded by the John Fell Oxford University Press (OUP) Research Fund and the Research Complex at Harwell is acknowledged for their hospitality. This work was supported by a DARPA MESO project (No. N66001-11-1-4105). S.E.H. was supported by the VPGE (Stanford University). L.C.M. and A.A.B. acknowledge partial financial support from EPSRC (UK) through a Doctoral Training Award. Diamond Light Source is acknowledged for beamtime on I10 (proposal SI10207).Breaking time-reversal symmetry through magnetic doping of topological insulators has been identified as a key strategy for unlocking exotic physical states. Here, we report the growth of Bi2Te3 thin films doped with the highest magnetic moment element Ho. Diffraction studies demonstrate high quality films for up to 21% Ho incorporation. Superconducting quantum interference device magnetometry reveals paramagnetism down to 2 K with an effective magnetic moment of ∼5 μB/Ho. Angle-resolved photoemission spectroscopy shows that the topological surface state remains intact with Ho doping, consistent with the material's paramagnetic state. The large saturation moment achieved makes these films useful for incorporation into heterostructures, whereby magnetic order can be introduced via interfacial coupling.Peer reviewe
Temperature effect on space charge dynamics in XLPE insulation
No full textThis paper reports on space charge evolution in crosslinked polyethylene (XLPE) planar samples approximately 1.20 mm thick subjected to electric stress level of 30 kVdc/mm under four temperature 25 oC, 50 oC, 70 oC and 90 oC for 24 hours. Space charge profiles in both as-received and degassed samples were measured using the laser induced pressure pulse (LIPP) technique. The dc threshold stresses at which space charge initiates are greatly affected by testing temperatures. The results suggest that testing temperature has numerous effects on space charge dynamics such as enhancement of ionic dissociation of polar crosslinked by-products, charge injection, charge mobility and electrical conductivity. Space charge distributions of very different nature were seen at lower temperatures when comparing the results of as-received samples with degassed samples. However at higher temperature, the space charge distribution took the same form, although of lower concentration in degassed samples. Space charge distributions are dominated by positive charge when tested at high temperatures regardless of sample treatment and positive charge propagation enhances as testing temperature increases. This can be a major cause of concern as positive charge propagation has been reported to be related to insulation breakdown
Convex functions on Grassmannian manifolds and Lawson–Osserman problem
No full textAbstractWe derive estimates of the Hessian of two smooth functions defined on Grassmannian manifold. Based on it, we can derive curvature estimates for minimal submanifolds in Euclidean space via Gauss map as in [Y.L. Xin, Ling Yang, Curvature estimates for minimal submanifolds of higher codimension, arXiv: 0709.3686; 24]. In this way, the result for Bernstein type theorem done by Jost and the first author could be improved
Cell apoptosis induced by a synthetic carbazole compound LCY-2-CHO is mediated through activation of caspase pathway.
No full textsj-docx-1-taj-10.1177_20406223221086996 – Supplemental material for Sodium-glucose cotransporter 2 inhibitors and neurological disorders: a scoping review
No full textSupplemental material, sj-docx-1-taj-10.1177_20406223221086996 for Sodium-glucose cotransporter 2 inhibitors and neurological disorders: a scoping review by Thahesh Tharmaraja, Jamie S.Y. Ho, Ching-Hui Sia, Nicole-Ann Lim, Yao Feng Chong, Amanda Y.L. Lim, Rahul R. Rathakrishnan, Leonard L.L. Yeo, Vijay K. Sharma and Benjamin Y.Q. Tan in Therapeutic Advances in Chronic Disease</p
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