分光偏光解析等によるSiC酸化膜の評価

We have developed the method of obtaining the refractive indices of SiC/oxide interfaces by use of spectroscopic ellipsometry, and by using this method we have characterized SiC/oxide interfaces obtained by various oxidation methods and/or post oxidation annealing (POA). We have designed and fabricated the system with which in situ spectroscopic ellipsometry measurements can be carried out. We have observed the initial oxidation stage of SiC. We have also observed the changes of the refractive indices of interfaces by annealing in Ar atmosphere (Ar POA). The changes of atomic bond states at the interface by Ar POA were also observed by angle-resolved XPS and UPS, and compared with the results obtained form optical measurements and C-V measurements. We have developed the measurement method of obtaining carrier density and mobility distribution in SiC wafers by use of microscopic FT-IR. We have shown that the values obtained by this method well agree with those obtained from Hall measurements, suggesting that the method is useful to characterize electrical properties of SiC wafers quantitatively, non-destructively and without contact.textapplication/pdfdepartmental bulletin pape

A balloon-borne very long baseline interferometry experiment in the stratosphere: Systems design and developments

application/pdfAdvances in Space Research. 2019, 63 (1), P.779-793journal articl

Observation of B̅0→DsJ*(2317)+K- Decay

journal articl

Solar neutrino measurements in Super-Kamiokande-II

The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The timedependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured 8B total flux is (2:38± 0.05(stat.)/begin+0.16 // -0.15/end (sys.)) × 10^6 cm^{-2} s^{-1} and the day-night difference is found to be (-6.3 ±4.2(stat.)±3.7(sys.))%.There is no evidence of systematic tendencies between the first and second phases.journal articl

序 : 「都市法」論のさらなる展開に向けて(<特集>日本における「都市法」論の生成と展望)

departmental bulletin pape

Data_Sheet_1_The Exaptation of HERV-H: Evolutionary Analyses Reveal the Genomic Features of Highly Transcribed Elements.xlsx

HERV-H endogenous retroviruses are thought to be essential to stem cell identity in humans. We embrace several decades of HERV-H research in order to relate the transcription of HERV-H loci to their genomic structure. We find that highly transcribed HERV-H loci are younger, more fragmented, and less likely to be present in other primate genomes. We also show that repeats in HERV-H LTRs are correlated to where loci are transcribed: type-I LTRs associate with stem cells while type-II repeats associate with embryonic cells. Our findings are generally in line with what is known about endogenous retrovirus biology but we find that the presence of the zinc finger motif containing region of gag is positively correlated with transcription. This leads us to suggest a possible explanation for why an unusually large proportion of HERV-H loci have been preserved in non-solo-LTR form.</p

Group specific log likelihoods and corresponding maximum likelihood estimates of parameter values under exponential and Weibull deletion processes.

Parameters were constrained to the interval 10−6 to 102.</p

Comparison of the fluctuation patterns for the Dvl2 PDZ (A) and the Erbin PDZ (B).

<p>The Dvl2 PDZ shows considerably more fluctuation across its binding site compared to Erbin PDZ. Comparison of the flexibility patterns for Dvl2 (C) and Erbin (D). The color bar indicates the extent of fluctuation or flexibility for the pairs of residues in the matrix with red indicating the most fluctuation (or flexibility) and dark blue the least.</p

Experimental and Predicted Sensitivity versus Predicted FDR

<p>Axes show predicted proportion of neutral nucleotides (horizontal) and proportion of identified nucleotides among mouse-aligning nucleotides within annotation class (vertical). Red, yellow, and green curves show partial sensitivity to (known or likely) functional DNA, with the predicted sensitivity to DNA under indel-purifying selection (blue curve) following their general trend. For a fair comparison, the partial sensitivities were computed relative to the material common to human, mouse, and dog. The purple curve charts the sensitivity for neutrally evolving ARs, for comparison. Note that the false positive fraction (relative to mouse-aligning neutral elements) is considerably lower than the predicted FDR (relative to the identified set). Converting to the false positive fraction, we calculate the area under the resulting receiver-operating-characteristic curve to be high at 0.93, indicative of the method's discriminatory power.</p

The primate host phylogeny used in this study.

<p>Nodes are labelled (fixed-width typeface) and branch lengths are given in millions of years (Myr) in accordance with [<a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1004964#pcbi.1004964.ref011" target="_blank">11</a>].</p