Articles you may be interested inSurface morphology effect on the photoresponse of high temperature superconducting microbridges

The etching profiles of n-GaAs electrodes are controlled under laser illumination and anodic polarization. Depending on the incident light power and pH of the solution two etching profiles are obtained: at strong alkali or acid pH the photon flux limits the photodissolution of GaAs. The etching profile is Gaussian, reproducing the photon distribution of the laser. This etching profile is associated with an immediate and constant photocurrent. At intermediate pH, the growth of an oxide layer limits the photodissolution of n-GaAs. Therefore we obtained a flat bottom etching profile related to a decrease of the photocurrent to a steady state.

A dc superconducting quantum interference device (SQUID) is fabricated on an amorphous Y-Ba-Cu-O film by a photolithographic technique and successive post-annealing treatment. The SQUID shows periodic and symmetric behavior in the voltage versus magnetic-flux curves (V-Φ curves). No multiple periodicities are observed. The transfer function ∂V/∂Φ for output voltage is about 90 and 20 μV/Φ0 at 4.2 and 56 K, respectively. It is expected that the SQUID contains only two symmetric active Josephson junctions.

The CT findings of eleven patients with intramural hematoma of the gastrointestinal tract are presentedThe most frequent site of intramural hematoma was duodenum(7 1 11), followed bjejunum(21 11), ascending colon(2 1 1 1), stomach( 111 1), and rectum( 1111). B1unt abdominal trauma was the prime etiologic fac tor(7 1 11) , others included pancreatitis. iatrogenic and unknown Intramural hematoma s howed three patterns of CT characteristics ; intramural mass(81 11 }, thickened bowel wall(l I 11 }, and both(21 11). There were variable attenuation value of 10 cases of intramural mass; homogeneou s hyperdensity or hypodensity in each 3 cases , inhomogeneous or mixed density in 4 cases. A1so there were p e ripher외 lucent halo(l / lO) , pseudocapsule or dense rim(5 / 1 이 ， crescentic hyperdensity(2 / 10) and central hyperd ense area(4 / 10). Associated CT features were h emoperitoneum(4) , mesenteric infiltration, fatty Iiver, pancreatic contusion. a nd chronic pancreatitis.CT is the most accurate method in establishing the diagnosls 01 intramural hematoma , evaluating the extent of bleeding a nd its effec t on adjacent organs, demonstrating regression after treatmen t, and detecting associated injury lndex Words : Gastrointestinal tract, hematoma 70.412Gastrointestina l tract. CT 70.1211