OBJECTIVE The description of Barrett's esophagus which is a risk factor for esophageal adenocarcinoma has differences, and the need of goblet cells for diagnosis is controversial. However, the pathophysiology in the metaplasia seen in Barrett's esophagus is not totally understood and new methods are searched for the assessment of progression to dysplasia. We aimed to search the immunohistochemi...

Hydrogenated intrinsic amorphous silicon ((i) a-Si:H) layers deposited on n-type crystalline silicon (c-Si) by plasma enhanced chemical vapour deposition (PECVD) are investigated during long-time thermal treatment (100 h at 200°C) with regard to the depth profile of hydrogen in the a-Si layer and its diffusion into the c-Si bulk. The morphology of the (i) a-Si:H is manipulated by the PECVD proc...

in this paper a novel direct adaptive fuzzy system is proposed to control flexible-joints robot including actuator dynamics. the design includes two interior loops: the inner loop controls the motor position using proposed approach while the outer loop controls the joint angle of the robot using a pid control law. one novelty of this paper is the use of a pso algorithm for optimizing the contro...

in this paper, three-dimensional modeling of the fatigue crack growth profiles was performed in a simple riveted lap joint. simulation results showed that mode i was dominated on the one side of the plates and the crack straightly grew on this side, while the other side of the plates was in a mixed-mode condition and the crack propagation path was not straight on this side. afterward, the fract...

Hydrogenated intrinsic amorphous silicon ((i) a-Si:H) can be grown by plasma-enhanced chemical vapor deposition with a non-columnar or columnar morphology. Nuclear resonant reaction analysis and corresponding effective stopping cross section analysis indicate a dependency of hydrogen effusion on the morphology of the (i) a-Si:H layer as well as the doping type and concentration of the c-Si wafe...

New wedge-shaped thermotropic liquid crystalline materials containing a guanidinium moiety at the apex organize into various supramolecular structures such as hexagonal columnar, rectangular columnar and Pm3n cubic mesophases depending on anions illustrating guest-directed self-organization in mesophases.

Columnar Oriented Database is an enhance approach to service to service the needs of Business Intelligence. A Columnar Oriented Database Management system that stores content by columns rather than the row. This type of data differs from traditional database with regards to performance, storage requirements and easy to modification of the schema. One of the major advantage of column based datab...

Since a very early stage of discotic liquid crystal research, triphenylene derivatives are known to be useful materials for the study of discotic liquid crystals. Recently, their importance as photoconducting materials was recognized [1]. Blue phases had only been observed in binary mixtures [2, 3]. It took over ten years to experimentally verify [4] J. Prost’s prediction of ferroelectricity in...

Abstract Humans are able to perform skilful movements by coordinating muscles throughout the body. It has been revealed that not only neural mechanisms but also direct and dynamic interactions between body parts contribute muscular coordination. Tensegrity, accurately biotensegrity, can be considered basic mechanism for interactions. Tensegrity structures composed of tensile compressive compone...