Vanadium dioxide is a key material for thermochromic smart windows that can respond to environmental temperatures tomodulate near infrared irradiation froma transparent state at low-temperature to an opaque state at high-temperature while maintaining the visible transmittance. This paper reports a novel VO2/FTO/ glass multi-layered structure, which shows promising optical properties for applica...

We hypothesized that the metabolic acidosis resulting from the performance of multiple-sprint exercise would enhance muscle perfusion and result in a speeding of pulmonary oxygen uptake (VO2)kinetics during subsequent perimaximal-intensity constant work rate exercise, if O2 availability represented a limitation to VO2 kinetics in the control (i.e., no prior exercise) condition. On two occasions...

Abstract VO2 films are widely considered as one of the most suitable material to act smart windows. Although this system is able function, durability film has been an issue surface may oxidize by converting V4+ V5+. To overcome problem, attempt made coat with ZnO, which can assist creating a resistance layer prevent further oxidation VO2. Here, VO2/ZnO bilayer was prepared facile method compris...

Vanadium dioxide (VO2) undergoes a fully reversible first-order metal–insulator transition from the M1 monoclinic phase (P21/c) to high-temperature tetragonal (P42/mnm) at around 68 °C. Modulation of VO2 by chemical doping is fundamental and technological interest. Here, we report synthesis highly crystallized Fe-doped powders carbo-thermal reduction process. The impact Fe on structural studied...

We report the synthesis of single-crystalline VO2 nanowires with rectangular cross sections using a vapor transport method. These nanowires have typical diameters of 60 (+/-30) nm and lengths up to >10 mum. Electron microscopy and diffraction measurements show that the VO2 nanowires are single crystalline and exhibit a monoclinic structure. Moreover, they preferentially grow along the [100] dir...

This study compared the relationship of maximum oxygen uptake and skeletal muscle enzyme activities to the submaximal exercise intensity eliciting 4 mM blood lactate (OBLA). Twelve subjects performed both cycle (Cy) and treadmill (Tr) submaximal exercise with step-wise increments each fourth minute. Blood lactate concentration and oxygen uptake (VO2) were determined during the final minute of e...

PURPOSE The purpose of this study was to develop a generalized equation to predict VO2 during level treadmill walking in young boys and girls. METHODS On an annual basis from ages 6 to 10, 23 able-bodied children (14 girls, 9 boys) completed six 5-min walking bouts at speeds ranging from 40.2 to 107.2 m x min(-1). Before testing, each child received 60 min of treadmill walking practice. Durin...

OBJECTIVE To suggest criteria to guide protocol prescription in ramp treadmill testing, according to sex and age, based on velocity, inclination, and max VO2 reached by the population studied. METHODS Prospective study describing heart rate (HR), time, velocity, inclination, and VO2 estimated at maximum effort of 1840 individuals from 4 to 79 years old, who performed a treadmill test (TT) acc...

Designing materials with a negative feedback function is beneficial for achieving temperature regulation inside a greenhouse. VO2 has been studied extensively because of its low insulator-to-metal transition temperature (IMT). In this study, reflection changes during a VO2 phase transition were investigated. Glass fiber cloth was used as a substrate, as it is stable and soft. A VO2 thin film on...

To evaluate the capacity of different metabolic indices to predict performance in middle distance swimming, 15 competitive swimmers performed a submaximal and a maximal 400 metres freestyle swimming event. Expired gases were collected in Douglas bags immediately after the events for the determination of VO2 max. Arterialized blood samples were collected for the determination of maximal blood la...