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A split-ring-resonator-based active metamaterial was investigated for manipulating the spatial intensity profile or wavefront of transmissive waves. In this work, varactor diodes were mounted at gaps in split-ring resonators to electrically control the waves. The fabricated active SRRs exhibit an ON/OFF ratio of 15 dB and a change in the transmission phase of 40o/layer by applying voltage to the varactor...
We experimentally demonstrate a metamaterial flat lens based on split-ring resonators at 120 GHz based on the gradient index optics theory. The gap of the SRRs that were used as a unit cell of the lens was varied to obtain desired reflective index at a specific place in the lens. In this work, a far-field radiation pattern of an open-ended waveguide antenna was measured with and without the metamaterial...
The effect of a thin Si layer insertion at W/La 2 O 3 interface on the electrical characteristics of MOS capacitors and transistors is investigated. A suppression in the EOT increase can be obtained with Si insertion, indicating the inhibition of diffusion of oxygen atoms into La 2 O 3 layer by forming an amorphous La-silicate layer at the W/La 2 O 3 ...
Modified maps are widely used for a variety of purposes such as in tourist guides to help people find geographical objects using simple figures. However, modified maps might become problematic if they contain inaccurate information. This is because most modified maps are not updated with dynamic real-world information, and they might contain incorrect or superfluous information in that some objects...
In this paper, we report our approaches in realizing EOT of 0.5nm and below with rare earth La2O3 high-k gate dielectric. An EOT of 0.43nm was obtained from a TiN/W/La2O3(3nm)/n-Si capacitor by optimizing the thickness W layer. Our results show that a proper gate electrode is one of the most important factors for realizing EOT below 0.5nm.
A direct high-k/Si gate stack has been proposed for gate oxide scaling. With LaCe-silicate, an EOT of 0.64 nm with an average dielectric constant (kav) of 17.4 has been obtained and an extremely low gate leakage current (Jg) of 0.65 A/cm2. The flatband voltage (Vfb) can be controlled by the compositional ratio of La in the LaCe-silicate layer. Furthermore, incorporation of Ge atom into the silicate...
We present a method of automatically generating learning channels by using the semantic relations that implicitly exist in slides of a lecture that has accompanying recorded video. These days, many lecture videos with presentation files are shared over the Web from many universities through their own public sites. Although these materials are useful and valuable to many potential students, their use...
Maps on the Internet are enhanced with many types of information and annotations. Searching these digital maps by directory sevices can yield more information about places and objects on the maps. However, when there is a large amount of information, the user difficult to find geographical objects according for user's intention. In other words, searches by directory sevices do not always present the...
Digital maps are widely used these days. However, they often display geographical objects that are no longer present or do not display newly created geographical objects because the various map suppliers update their maps at different times. In other words, map media contain wrong information. Users who believe that a digital map contains accurate information may encounter problems when going somewhere...
Recently, video sharing Websites that allow users to attach comments to video clips have attracted much attention. In this paper, we propose a method whereby users can easily retrieve video scenes relevant to their interest. Our system makes both a text and non-text analysis of a user's comment and then retrieves and displays relevant scenes for viewing of the scenes along with attached comments....
It has become easier for users to view presentation content consisting of synchronized heterogeneous media such as videos and slides. Users simply retrieve the stored content they wish to view. In most cases users are interested in viewing a specific portion of the content. Scenes extracted from a presentation, however, often do not help the user understand the content, even when those scenes contain...
Recently, video sharing sites that allow visitors to attach comments to video have attracted a lot of attention. Video also provides a means of communication on social network sites. This kind of communication is expected to become even more popular in the future. One problem is that discussion jumps from one topic to another as users add their viewpoints. Also, conventional video sharing sites show,...
Presentation content can consist of heterogeneous media, such as videos and slides, which have been recorded and used. A variety of retrieval methods have been proposed for each kind of stored media. This paper proposes an extraction method using the features of each type of media. The proposed method specifically uses presentation video and slides. A user inputs query keywords, which are used to...
Video and text-news content have recently been broadcast on TV, newspapers, and the Internet. Although video content on out-of-date news is of little value for viewing, it can be considered to have value by comparing it to related content. Repeated news should especially be compared, e.g., the Olympic games and international expositions. We propose a method of retrieving comparison content based on...
When we want information on current events, we often view news programs on TV or news streams on Web sites. A news video stream consists of several scenes, and viewers often gain a broad understanding of the news by viewing scenes in the given order. Since a viewer's opinion of a news topic depends on the scene order, we have developed a method for extracting blog entries expressing a particular point...
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