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Kern, Kadic, and Wegener Reply.
Phys Rev Lett
April 2018
Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany.
Experimental Evidence for Sign Reversal of the Hall Coefficient in Three-Dimensional Metamaterials.
Phys Rev Lett
January 2017
Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany.
Effectively inverting the sign of material parameters is a striking possibility arising from the concept of metamaterials. Here, we show that the electrical properties of a p-type semiconductor can be mimicked by a metamaterial solely made of an n-type semiconductor. By fabricating and characterizing three-dimensional simple-cubic microlattices composed of interlocked hollow semiconducting tori, we demonstrate that sign and magnitude of the effective metamaterial Hall coefficient can be adjusted via a tori separation parameter-in agreement with previous theoretical and numerical predictions.
View Article and Find Full Text PDFTrial of Continuous or Interrupted Chest Compressions during CPR.
N Engl J Med
December 2015
From the University of Washington-Harborview Center for Prehospital Emergency Care (G.N.) and Clinical Trial Center (G.N., B.L., R.H.S., S.M.) and Seattle-King County Center for Resuscitation Research, University of Washington (P.K., T.D.R.) - all in Seattle; University of Alabama School of Medicine (H.W., S.S.) and Birmingham Fire and Rescue Service (J.R.) - both in Birmingham; Pittsburgh Resuscitation Network, University of Pittsburgh, Pittsburgh (C.W.C., J. Condle); National Heart, Lung, and Blood Institute, Bethesda (G.S., D.E.), and Johns Hopkins University School of Medicine, Baltimore (M.W.) - both in Maryland; Ottawa/Ontario Prehospital Advanced Life Support Resuscitation Outcomes Consortium, Ottawa Hospital Research Institute, University of Ottawa, Ottawa (I.S., C.V.), Li Ka Shing Knowledge Institute, St. Michael's Hospital, University of Toronto, Toronto (L.J.M., S.C.), and the University of British Columbia, Vancouver (J. Christenson, R.S.) - all in Canada; the Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee (T.P.A., R.C.); Dallas-Fort Worth Center for Resuscitation Research, University of Texas Southwestern Medical Center, Dallas (A.H.I., M.I.); and Virginia Commonwealth University Health System, Richmond (J.P.O.).
Background: During cardiopulmonary resuscitation (CPR) in patients with out-of-hospital cardiac arrest, the interruption of manual chest compressions for rescue breathing reduces blood flow and possibly survival. We assessed whether outcomes after continuous compressions with positive-pressure ventilation differed from those after compressions that were interrupted for ventilations at a ratio of 30 compressions to two ventilations.
Methods: This cluster-randomized trial with crossover included 114 emergency medical service (EMS) agencies.
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