Microwave-assisted synthesis and electrochemical evaluation of VO2 (B) nanostructures

Understanding how intercalation materials change during electrochemical operation is paramount to optimizing their behaviour and function and in situ characterization methods allow us to observe these changes without sample destruction. Here we first report the improved intercalation properties of bronze phase vanadium dioxide VO2 (B) prepared by a microwave-assisted route which exhibits a larger electrochemical capacity (232 mAh g-1) compared with VO2 (B) prepared by a solvothermal route (197 mAh g-1). These electrochemical differences have also been followed using in situ X-ray absorption spectroscopy allowing us to follow oxidation state changes as they occur during battery operation

Robustness of Highly Entangled Multi-Qubit States Under Decoherence

We investigate the decay of entanglement, due to decoherence, of multi-qubit systems that are initially prepared in highly (in some cases maximally) entangled states. We assume that during the decoherence processes each qubit of the system interacts with its own, independent environment. We determine, for systems with a small number of qubits and for various decoherence channels, the initial states exhibiting the most robust entanglement. We also consider a restricted version of this robustness optimization problem, only involving states equivalent under local unitary transformations to the |GHZ> state.Comment: 16 pages, 3 figures. Changes in Sec.

The Mariner 5 flight path and its determination from tracking data

Mariner 5 flight path and its determination from tracking dat

Diabetes insípida central e hipotiroidismo secundario debidos a un macroadenoma hipofisario en un perro

Se expone el caso de una perra que presentaba inicialmente midriasis unilateral como único signo clínico. A los 12 meses apareció también midriasis en el otro ojo junto con poliuria, polidipsia, letargia y alopecia bilateral troncal. Tras distintas pruebas se diagnosticó diabetes insípida central e hipotiroidismo secundario, presuntamente debidos a un tumor hipofisario posteriormente confirmado mediante necropsia.