A simulation study of aqueous and gas phase DNAPL migration in shallow unsaturated land elements

Knowledge of DNAPL migration behaviours in shallow unsaturated land elements might be useful in characterizing and deciding suitable remediation techniques for DNAPL contaminated sites. One-dimensional simulations of simultaneous heat, moisture, and gas and aqueous phases DNAPL transport in soil due to diurnal land-atmosphere interactions was carried out The top 0.11-m soil was initially contaminated with uniform DNAPL concentrations in aqueous and gas phases. Two cases of moisture content scenario were presented in the simulations. The results indicated that vegetation cover played significant roles in soil heat and moisture budgets in addition to soil composition and their properties. Vegetation cover significantly reduced the incoming solar radiation to the ground surface resulting to smaller diurnal fluctuations in soil temperature and moisture contents in vegetated lands. The decrease in aqueous phase DNAPL concentrations in the contaminated soil layer and the downward migration depths were relatively bigger in vegetated lands. Rainfall percolation further reduced diurnal soil moisture fluctuations resulting to bigger aqueous phase DNAPL migration depths. Gas phase DNAPL exhibited bigger vertical spreading tendency. Further investigations including other process in the contaminant transport equations, and sensitivity analyses on their relative importance would provide more insight in the matter.textapplication/pdfjournal articl

複雑な家庭事情を背景にもつ心気的訴えの多い患者の看護

Article信州大学医学部附属病院看護研究集録 1977: 55-58(1977)departmental bulletin pape

Inclusive Measurement of the Photon Energy Spectrum in b→sγ Decays

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Time-Dependent CP-Violating Asymmetry in B^0→p^0γ Decays

We report the first measurement of CP-violation parameters in B^0 → p^0γ decays based on a data sample of 657×10^6B\bar{B} pairs collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We obtain the time-dependent and direct CP-violating parameters, S_p0γ=-0.83±0.65(stat)±0.18(syst) and A_poγ= -0.44±0.49(stat)±0.14(syst), respectively.journal articl

コミュニケーションのための英文法 : 日本と英米で刊行された学習英文法書における，ショートアンサー，付加疑問，聞き返し疑問，未来表現の比較研究

application/pdfIf language teachers wish to enhance learners' communicative activities, they should carefully select the materials being learned and decide the efficient ways of providing them for learners. Grammar is not an exception for this. However, the English grammar textbooks published in Japan are not so suitable to this. This will become more evident when we compare them with the grammar books from U.K. or U.S. Those from Japan often neglect the materials that are more highly valued for communication, and fail to have learners use the target language. Specifically, they have the following characteristics: 1. Meta-linguistic description is weighed much more than examples. 2. Single example sentences which do not constitute any context dominate the textbook. 3. Much fewer linguistic features of spoken language are incorporated than those of written language. I'd like to propose several reformations in the learning and teaching of grammar in Japan so that language teachers can make English learning more communicative.departmental bulletin pape

研究速報 : Quick Report on the Oct. 6, 2000, Western Tottori Prefecture Earthquake

departmental bulletin pape

Basins and bifurcations of a delayed feedback control system and its experimental verification for a DC bus circuit

application/pdfNonlinear Dynamics. 2021, 106 (3), P.2363-2376journal articl