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Simian T-cell leukemia viruses (STLVs) are the simian counterparts of human T-cell leukemia viruses (HTLVs). A novel, divergent type of STLV (STLV-L) from captive baboons was reported in 1994, but its natural prevalence remained unclear. We investigated the prevalence of STLV-L in 519 blood samples from wild-living nonhuman primates in Ethiopia.(More)
This paper proposes the use of band-limited random sequences to introduce further flexibility in the spread spectrum based audio data hiding. To realize the sub-band data hiding, a systematic method is developed in order to generate band-limited and orthonormal random sequences of any length. In experiments, we evaluated the selective use of frequency(More)
This paper describes the interpolation of head related transfer functions (HRTFs) for all directions. The interpolation of HRTFs enables us to reduce the number of measurements for new user’s HRTFs, and also reduce the data of HRTFs in auditory virtual systems. A linear interpolation and the spline interpolation are evaluated and the advantages of both(More)
This paper demonstrates a power supply noise reduction using stubs. A quarter-length stub attached to the power supply line of an LSI chip works as a band-eliminate filter, and suppresses the power supply noise of the designed frequency. Preliminary experiments show that 90% of the designed frequency noise component is suppressed when off-chip stubs are(More)
This paper demonstrates design and measurement of an on-chip di/dt detector circuit for power supply line. The di/dt detector circuit consists of a spiral inductor under the power supply line which induces a di/dt proportional voltage, and an amplifier which amplifies and outputs the value. The di/dt detector is mounted on Cu board, and the measurement(More)
Transmitter and receiver antennas monolithically integrated with CMOS LSIs are strongly demanded for reducing the cost of wireless equipment. As the first step toward realizing high-performance antennas on lossy Si substrates, we clarify the design methodology and basic characteristics of inverted-F antennas used for the 7-GHz band corresponding to(More)
A symbolic layout system for double-metal silicon-gate MOS technology in the style of Gate Matrix is presented. This system provides an integrated layout environment which consists of stick-figure-based graphic editor, a mask artwork generator, a connectivity checker, a circuit parameter extracter and simulator interfaces. All the modules are designed to(More)
Wr prexnt a high-speed XGA 3-D iin:ipr xtisnr had on [he lighi-\i.ction tiierhud a i d i t5 applicaiionh. The 7-D iniiigz scnwr tins thc c:iliahilily of 1024 x 7hX 3-D pahitinn data OF ;I large1 hcenr in rciil rime. It ha\ brcn drsigr1c.d mirig i i tiigh-i@ ;LCCC\\ nirthud with an :id;iptivc thre\huld circuii and coluti~n-p:ir;rliel timr.-dom;iiii ADC\.(More)
We present word-parallel digital associative memories with exact Hamming/Manhattan distance computation. A logic-in-memory digital implementation achieves the word-parallel and hierarchical search architecture. It attains a high-speed operation with a large input number, and detects the data close to the input with a fewer number of clocks. The circuit(More)