We simultaneously observed self- and boron diffusion in silicon using (na)tSi/(28)Si isotope superlattices. A calculation based on diffusion equations involving 311 defects and boron-interstitial cluster models was employed to reproduce the diffusion profiles in silicon-implanted (intrinsic) and boron-implanted (extrinsic) silicon isotope superlattices, followed by annealing. To investigate the diffusion processes, the time evolution of the silicon self- interstitial profiles during the
transient diffusion was simulated. The results directly demonstrate that excess neutral self-interstitials dominantly enhance the self- diffusion during the transient process in the intrinsic conditions, while doubly positively charged self-interstitials dominate the self- diffusion in the extrinsic Protein Tyrosine Kinase inhibitor conditions. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3054325]“
“This manuscript presents my personal experiences as a physician undergoing several surgical procedures including radical neck surgery for removal of pyriform sinus squamous cell carcinoma. I am telling my personal story in
hopes that health care providers will realize the difficult challenges that a patient diagnosed with cancer and undergoes extensive surgeries must face. Facing and living through the difficulties and tribulations selleck inhibitor of a post-laryngectomy patient has illustrated to me how dependent and helpless one can be after this surgery. Being unable to speak, eat, and breathe
normally, while dealing with a potential Torin 2 datasheet fatal illness, makes the patient extremely vulnerable, both physically and emotionally. During this difficult and challenging time, a proficient, competent, compassionate and caring approach that understands what the patient is experiencing should be practiced. Published by Elsevier Ltd.”
“We consider a nanodisk possessing two coupled materials with different ferromagnetic exchange constants. The common borderline of the two media crosses at the disk center, dividing the system exactly in two similar half-disks. The vortex core motion crossing the interface is investigated using a two-dimensional model, which mimics a very thin, real material with such a line defect. The main result of this study is that, depending on the magnetic coupling which connects the media, the vortex core can be dramatically and repeatedly flipped up to down by the interface. This phenomenon produces a burstlike emission of spin waves each time the switching process takes place. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3057018]“
“Background: Approximately one-third of patients with localized osteosarcoma at presentation relapse as well as about three-fourths of the patients with metastases at diagnosis, about 90% of relapses are lung metastases. The role of lung metastasectomy remains to be determined.