NEC

About: NEC is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 33269 authors who have published 57670 publications receiving 835952 citations. The organization is also known as: NEC Corporation & NEC Electronics Corporation.

Update system, update client apparatus, update server apparatus, and programs

Abstract: An update client sends to an update server which is connected to the update client via a communication line, identification information of a driver and firmware which are included in a disk array system, and identification information of an error event which has occurred in the disk array system. The update server determines whether update of the driver and the firmware is necessary or not in accordance with a combination of the supplied identification information of the driver, the firmware, and the error event. In a case where it is determined that update is necessary, the update server sends to the update client, update data corresponding to the combination of the supplied identification information of the driver, the firmware, and the error event. The update client updates both of the driver and the firmware using the supplied update data.

Image Signature Robust to Caption Superimposition for Video Sequence Identification

Abstract: This paper proposes an image signature robust to caption superimposition for video sequence identification. A new image signature which is a set of local features is developed for a high-speed frame-by-frame matching of video sequences. The signature of a frame is obtained by partitioning the image into blocks and extracting the local feature representing the dominant type of edge direction from each block. The similarity between the signatures is calculated by comparing the edge types of the corresponding blocks, and counting the number of the blocks having the same edge type. A weighting scheme based on the probability of caption superimposition for each block can be applied to the similarity calculation to improve the matching performance. The experimental results of the video sequence identification show that the proposed signature achieves precision of 99.65% and recall of 99.45%, improving both the precision and the recall by more than 30% compared with the conventional signature.

A silicon electrostatic ultrasonic transducer

Abstract: An electric ultrasonic transducer is developed by using a silicon IC process. Design considerations are first presented to obtain high sensitivity and the desired frequency responses in air. The measured transmitter sensitivity is 19.1 dB (0 dB=1 mu bar/V) at a point 50 cm away from the devices, when the devices are operated at 150 kHz. The receiving sensitivity is 0.47 mV/Pa in the 10-130-kHz range, with bias voltages as low as 30 V. An electronic sector scanning operation is also achieved by time-sequentially driving seven elements arranged in a linear array on the same chip. The results should be helpful in the design of phased-array transducers integrated with electronic scanning circuits. >

Compact personal computer having a plurality of display panels

Abstract: In a personal computer which displays a plurality of images and which includes a body of the personal computer, a primary display panel provided on a front side of the body, and a secondary display panel provided adjacently to the primary display panel, the secondary display panel is slid to be contained into the primary display panel or outer sides of the primary display panel by the use of rack and pinion mechanism. The secondary display panel is rotatable towards both upper or lower side and left or right side with respect to the primary display panel by a hinge mechanism.

Structure of the water/platinum interface––a first principles simulation under bias potential

Abstract: Ab initio molecular dynamics simulations have been performed on the water/Pt interface. When the surface is neutral, water is found to form a contact layer directing its O atom toward the surface, i.e., O-down configuration. When the surface is negatively biased, the contact layer shows a significant structural change. The O-down configuration is converted mostly to the H-down configuration. As the surface is biased more strongly, we find that a hydrophobic double layer is formed in the contact layer.