An application that assists the beginners to learn logic circuits is proposed. A logic circuit is drawn by handling a mouse to select various logic elements provided with menu screen, and to connect them with lines on the display. When the timing simulation is executed, the operation situation of the making circuits are easily understood because from input end to output end they are displayed in red if it is true (1), and in blue if it is false (0). And then, by those timing charts the logic relations of the drawn circuits can be verified.

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監視カメラのような広域映像から行動を検出する場合，映像から行動の発生が予想される位置・時刻を行動候補領域として推定した後に，各行動候補領域について行動の種別を分類するという枠組みが一般に採用される．このとき，行動分類の難しさの一つとして，物体の移動方向，物体の位置関係の多様性による‘見え’のパターン変化への対応が挙げられる．本稿では，この問題に対処するため，行動候補領域中の物体の移動方向もしくは物体の位置関係が一定になるよう，事前に行動候補領域を回転，反転する行動正規化を提案する．実験により，ActEV/VIRATデータセットにおいて，ベースライン手法に行動正規化を組み込むことで行動分類精度が向上することを示す．

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Transient electromagnetic fields caused by electrostatic discharges (ESDs) are known to cause a serious failure in high-tech information devices. From this perspective, an international standard for ESD testing or IEC 61000-4-2 has been specified, in which a detailed waveform of the discharge current to be injected onto equipment under test (EUT) by an ESD-gun is prescribed, and is also required for contact discharges onto a calibration current target called Pellegrini target, which is specially designed so that the waveform of an injected current and its observed voltage coincides. However, the coincidence relationship should not hold at high frequencies due to parasitic components which the target has. In this study, we constructed an FDTD model of the Pellegrini target, and calculated its transfer impedance by simulating the injected current onto the target and the corresponding output voltage in combination with an FDTD model being previously developed for an ESD-gun. As a result, we found that the target has a transfer impedance of almost 1-j0 Ω at less than a few hundred MHz, though it has resonance phenomena around 2-3 GHz, which was validated by measuring scattering parameters of the target through a transmission line with a network analyzer. Using the FDTD-calculated transfer impedance, we reconstructed injected current waveforms for contact and air discharges of an ESD-gun from their observed voltages to reveal that the injected current waveform is almost identical to the observed voltage waveform for the contact discharge, while the injected currents for the air discharges have smaller peaks and longer rise times than the observed voltages do due to the presence of resonance properties of the transfer impedance.

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In recent years, the number of drug trafficking using microblogs has been increasing, which has become a social problem. While cyber patrols have been conducted to crack down on such crimes, those who post crime-inducing messages use terms that camouflage their criminal intentions so-called “codewords” to avoid keywords such as “enjo kosai,” “marijuana,” and “methamphetamine” that may be monitored and attract police attention. These codewords change once they become popular, so it is always necessary to keep track of the latest codewords. Therefore, we propose a new method for detecting the latest codewords. In this paper, we offer a new way of detecting code words from the differences in the words used in posts to detect codewords used in a crime. Specifically, we propose a new method in which we divide words into two corpora, depending on whether a post containing a word has a criminal intention and detect codewords from the differences between similar words of the same word between two corpora. To confirm the effectiveness of the proposed method, we conducted an experiment to detect codewords. The experimental results showed that the proposed method was able to detect codewords with an accuracy of 0.56 persentages points higher than that of the baseline method. The experiment shows that the proposed method can reduce the burden of continuously monitoring code words by rapidly and automatically detecting new codewords that change with time; thus, it provides the possibility of showing clues for crimes.

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