724 research outputs found

    Periodic structures for integrated optics

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    This paper deals with the theory and device applications of periodic thin-film waveguides. Topics treated include mode solutions, optical filters, distributed feedback lasers (DFB), distributed Bragg reflector (DBR) lasers, grating couplers, and phase matching in nonlinear interactions

    The effective preparation of secondary amines bearing a vinylsilane functionality via the reaction of primary amines with alpha-chlorine-substituted allylsilanes catalysed by CuCl

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    http://www.ingentaconnect.com/content/stl/jcr/2007/00002007/00000008/art00009ArticleJOURNAL OF CHEMICAL RESEARCH-S. 2007(8): 464-467 (2007)journal articl

    Effect of Interdot Resistance on Single Electron Devices with Silicon Multi Dots

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    The effect of interdot resistance on single electron devices with Si (silicon) multi dots has been studied in this work. The devices were fabricated by a fabrication method consisting of three steps, i.e., sample preparation by wafer bonding technique, formation of Si dots and formation of Si channel and electrodes. It was found that the interdot resistance, which is influenced by the thickness of the interdot barrier region, determines the localization of the carrier. The device with strong carrier localization reveals the current oscillations on the drain current versus gate voltage characteristics. Such characteristics are caused by the Coulomb blockade effect, and this means that the device works based on single electron phenomenon. These results indicate that the interdot resistance plays an essential role on the device operation

    サンセイタイ シュツド セイドウキ カンケン (ゲ)

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    Performance improvement of JPEG2000 steganography using QIM

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    This paper presents a modified QIM-JPEG2000 steganography which improves the previous JPEG2000 steganography using quantization index modulation (QIM). Since after-embedding changes on file size and PSNR by the modified QIM-JPEG2000 are smaller than those by the previous QIM-JPEG2000, the modified QIM-JPEG2000 should be more secure than the previous QIM-JPEG2000.4th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2008), 15-17, August, 2008, Harbin, Chin

    A Case of Endotracheal Tube Damage during Maxillomandibular Osteotomy Found by Bronchofiberscope

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    We experienced a case of endotracheal tube damage during maxillomandibular osteotomy found by bronchofiberscope. The patient was a 22-year-old man, scheduled for maxillomandibular osteotomy under general anesthesia for the treatment of two jaws deformity. Tracheal intubation of Microcuff subglottic endotracheal tube (I.D.7.5 mm made by Halyard Health Care Inc.) was via the left nasal cavity. The surgery started from maxilla and became the maxillary transection approximately 50 min later. There was the indication of the ventilation gas leak from the operation after the maxillary transection, but we confirmed that, and there was no tube in the clear abnormal findings with bronchofiberscope. Because the positive pressure ventilation was possible, and the ventilation had no problem, we decided to resume surgery. After maxillary fixation was completed approximately 3 and a half hours later, and confirming with bronchofiberscope again, we confirmed an inflow of the blood in a tube and confirmed a tube laceration to around 4–5 cm from the nasal cavity entrance. We decided to conduct tube exchange. After the surgery, the cause of tube rupture was examined; it was then found that the tube was damaged by a bone chisel used during maxillary bone dissection. When there is doubt about a endotracheal tube damage, confirmation of the inner surface using a bronchofiberscope is useful, and it is important to grasp the case early
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