69 research outputs found
Stomach One-Point Cancer: One Case Report and Literature Review
Gastric cancer is one of the most common cancers and one of themost frequent causes of cancer deaths worldwide. Early detection andaccurate preoperative staging of gastric cancer is essential for planning optimal therapy such as endoscopic mucosal resection or gastric resection and offers the best prognosis. With advanced technology in diagnostic instruments and the mass screening, early gastric cancer has been detected easier. One-point cancer of gastric is a special type of early gastric cancer[1]. Diagnosis of one-point cancer of gastric is important for both the immediate treatment and the prognosis. There is still no consensus on the operation extent and postoperative treatment for patients with one-point cancer of gastric. Learned from previous reports[2-5], we know that existed in the superfi cial layer of the gastric mucosa and the superfi cial ulcer is one of the important characteristics of one point cancer of gastric. Herein, we report a case of one point cancer of gastric with the appearance of a deep infi ltrating ulcer. To the best of our knowledge, no such type of one point cancer of gastric has been reported
Anomalous Heat Conduction and Anomalous Diffusion in Low Dimensional Nanoscale Systems
Thermal transport is an important energy transfer process in nature. Phonon
is the major energy carrier for heat in semiconductor and dielectric materials.
In analogy to Ohm's law for electrical conductivity, Fourier's law is a
fundamental rule of heat transfer in solids. It states that the thermal
conductivity is independent of sample scale and geometry. Although Fourier's
law has received great success in describing macroscopic thermal transport in
the past two hundreds years, its validity in low dimensional systems is still
an open question. Here we give a brief review of the recent developments in
experimental, theoretical and numerical studies of heat transport in low
dimensional systems, include lattice models, nanowires, nanotubes and
graphenes. We will demonstrate that the phonon transports in low dimensional
systems super-diffusively, which leads to a size dependent thermal
conductivity. In other words, Fourier's law is breakdown in low dimensional
structures
Origin of the surface recombination centers in ZnO nanorods arrays by X-ray photoelectron spectroscopy
Bernard Heyberger, Hindiyya. Mystique et Criminelle (1720-1798), Paris 2001.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)2454 LNCS161-16
Field Similarity Algorithm
Proceedings of the Joint Conference on Information Sciences6432-43
Capture and recombination of acceptor bound excitons in the transition region from a two-dimensional to a quasi-three-dimensional GaAs/AlGaAs system
Acceptor energy levels in GaAs/AlGaAs quantum wells in the presence of an external magnetic field
Energy levels of ground- and excited shallow acceptor states in quantum wells (QWs) have been calculated in the presence of an external magnetic field within a four-band effective-mass theory, in which the valence-band mixing as well as the mismatch of the band parameters and the dielectric constants between well and barrier materials have been taken into account. The energy separations between the ground and different excited acceptor states are deduced at various magnetic fields. The g-factors of the acceptor 1S3/2 ground states and the 2P3/2 excited states are obtained for QWs with different well widths. The oscillator strengths of the acceptor infrared transitions in QWs corresponding to the G, D, and C lines of acceptors in bulk GaAs have also been calculated vs magnetic field up to 10 T
Free and acceptor-bound excitons in the transition region between two-dimensional and quasi-three-dimensional GaAs/AlGaAs systems
- …