Al2O3 ceramics were successfully brazed under high vacuum conditions using the active Ni50Ti50 master alloy at 1320 °C with different holding time. The interfacial microstructure of joint was characterized SEM, EDS and TEM. effects time on evolution mechanical properties joints investigated. results revealed that typical structure Al2O3/Ni–Ti for 45 min Al2O3/AlNi2Ti + Ni2Ti4O/Ni2Ti4O/TiNi. Ni2...

OBJECTIVE In the areas where intestinal metaplasia of the stomach is highly prevalent, diagnosing Barrett's esophagus solely by the presence of specialized columnar epithelium in the distal esophagus may lead to many false positive diagnoses. The aim of this study was to test validity of the specialized columnar epithelium as a diagnostic criterion of the short segment Barrett's esophagus in Ko...

Abstract—Joining of 1mm thick aluminum 6061 to titanium TC4 was conducted using Bypass-current MIG welding-brazed, and stable welding process and good bead appearance were obtained. The Joint profile and microstructure of Ti/Al joints were observed by optical microscopy and SEM and then the structure of the interfacial reaction layers were analyzed in details. It was found that the intermetalli...

In a 15 year prospective study of endoscopic surveillance of columnar lined oesophagus, 102 patients with a mean follow up of 54 (12.5) months and total follow up of 462 years have been evaluated. Of all the sets of biopsies taken, 59 in 21 patients were found to exhibit dysplasia or carcinoma. Four male patients had carcinoma of the oesophagus, indicating a 30 times increased risk of developme...

ABSTRACT: Columnar firings of neocortex, modeled by a statistical mechanics of neocortical interactions (SMNI), are investigated for conditions of oscillatory processing at frequencies consistent with observed electroencephalography (EEG). A strong inference is drawn that physiological states of columnar activity receptive to selective attention support oscillatory processing in observed freque...

On palpation, sub-mental bony spur was felt. The defect was associated with limitation of neck extension. Surgery was offered. At operation the extent of the sinus was about 4-6mm. The skin defect along with its cranial and caudal lesions was excised. The surgical wound was closed with multiple z-plasties (Fig. 2). The postoperative recovery was uneventful. Histopathology of the specimen showed...

Introduction: The Sc is an important parameter to monitor unit (MU) calculation in radiation therapy procedure. The aim of this study is to measurement and comparison of head scatter factor (Sc) for 9MV photon beam using the build-up cap and a columnar mini-phantom.   Materials and Methods: The measurements performed using a calibrated ion chamber (Scanditron...

Abstract High-entropy alloy, a new generation material, exhibits superior structural properties. For high-temperature applications, where dissimilar materials are in demand, HEAs may be joined with commercially available to improve their performance-life ratio. In this connection, joint was fabricated by gas tungsten arc welding between Al 0.1 CoCrFeNi-HEA and Inconel 718. The columnar dendriti...