Abstract In order to understand the trigger mechanism of slow‐moving landslides occurring in early cold season from late autumn winter, we investigated effect temperature on shear strength slip surface soils. Displacement‐controlled and stress‐controlled box experiments were performed undisturbed zone soils under residual conditions. Test results conducted at temperatures 9 25°C showed remarkable reductions with decreasing temperature. Creep‐like slow displacements induced by a decrease...

Abstract This paper presents experimental investigations regarding the effect of temperature on residual strength landslide soils at slow‐to‐moderate shearing velocities. We performed ring‐shear tests 23 soil samples temperatures 6–29°C. The test results show that shear smectite‐rich decreased when were relatively low. These positive effects (strength losses lower temperatures) observed for smectite‐bearing are typical under slow rates. In contrast, high rates, was gained as decreased. As...

Vascular refractoriness to infused angiotensin II (AII) characterizes normal human and ovine pregnancy. To ascertain whether the in gravid ewe is mediated by either endogenous plasma concentrations of renin AII or vasomotor reflexes, effects acute volume expansion (VE) on pressor response were studied chronically instrumented nonpregnant near-term pregnant sheep. Dose-response curves describing (delta BP) determined before after infusions 1.0 1 isotonic saline (NS) 0.5 10% dextran (D). In...

Abstract A comprehensive understanding of seasonal hydrological dynamics is required to describe the influence pore‐water pressure on stability landslides in snowy regions. This study reports results continuous meteorological and observations over 2 years a landslide body comprising Neogene sedimentary rocks northern Japan, where thick (3–5 m) snowpack covers land surface. Monitoring volumetric water content shallow unsaturated zones (<0.8 m depth) saturated bedrock at depths 2.0 5.2...

Abstract The aim of the present study was to simulate pathological uteroplacental circulation observed in complicated human pregnancies pregnant ewe and analyze its velocimetric changes. Four ewes at 16–17 weeks pregnancy were used study. Micro‐beads (Gelfoam) administered stepwise into uterine artery changes assessed by Doppler velocimetry. Gelfoam administration successfully embolized spiral arteries located decidual segment. embolization decreased bloodflow dose‐dependently from 550 ± 48...

Abstract Coastal erosion is becoming an increasingly serious consequence of climate change. This study demonstrates the effects coastal on landslide activity while considering amount and changes in pore water pressure. To determine factors related to slip generation, we specifically measured displacement, deformation, pressure, with high temporal resolution (1 s–1 h) for a Hokkaido, north‐eastern Japan, 7 months. It has been determined that landslides occur simultaneously Toe events also...

Abstract The seasonal snowpack and meteorological factors associated with the accumulation ablation of were monitored for 11 years in a mountainous area warm-temperate zone Japan. No notable rise was observed mean wintertime air temperature, but an increase seen difference between maximum minimum temperatures. Precipitation exhibited annual variability no reduction over measurement period. length continuous snow-cover period increased slightly years, trend observed. snow depth water...

Bleomycin, a new antitumor agent was applied in the therapy of 100 cases head and neck cancer. Out 75 given BLM only, tumor disappeared 10 5 there no recurrence for more than 6 months. The frequency regression 67.5% previously untreated 42.0% otherwise treated cases. Local injection were to small recurrent foci which appeared after radiotherapy, 3 did not show one year. Tumor seemed be enhanced by simultaneous irradiation. Histological findings often comparable those induced curative They...

Pore-water pressure fluctuations were observed in a Tertiary landslide, which is located heavy snow district, using an automated data acquisition system. Meltwater and/or rainfall (MR (a/o)), snow-related factors including water equivalent of snow, and landslide movement simultaneously obtained. The results observation for two consecutive years showed the long-term effects load on pore-water pressure, such as gradual rise accumulated. An investigation time-lag response ratio against MR (a/o)...

本論文は, 最大積雪深が3~5mに達する第三紀層の浅層地すべり地における土塊の変形機構を2年間にわたる変位量の観測結果から明らかにした。地すべりは春期から夏期にかけて不活発であった。しかし秋期から積雪初期にかけては, 降雨, 融雪に対する変位の応答性の向上によって地すべりの移動が活発化し, それにともなって土塊の引張変形が増加した。地すべりは厳冬期に一時停止したあと, 融雪期には土塊の変形をともなわずに緩慢に移動した。このような地すべり変形特性を規制する積雪の作用として, 1) 積雪荷重によるせん断強度の増加, 2) 積雪層のネット効果, 3) 積雪層の長期載荷によるすべり層の圧密化, が考えられた。

山地斜面の積雪分布を精度良く把握するため，冬季に3-5mの積雪がある新潟県東頸城丘陵内の同一斜面(0.3km2)を対象に，航空レーザスキャナを用いた積雪深計測をおこなった．計測は積雪期と無積雪期にそれぞれおこない，得られた積雪面標高と地表面標高の差分から積雪深の平面分布を求めた．精度検証のためGPSおよび超音波積雪深計による積雪深(グラウンドトゥルース)と比較した結果，航空レーザスキャナによる計測誤差は+26.5～-13.6cm，平均で+1.8cmとなった．これは一部の急斜面や尾根での異常値を除き，積雪深の平面分布を議論するために十分な精度を持っていると考えられた．積雪分布図をもとに，地形条件による積雪特性について以下の傾向が明らかとなった．1)積雪深は北および北東斜面で増加し，南斜面で減少する．2)積雪深は尾根状地形で減少し，谷状地形で増加する．急斜面から緩斜面への傾斜変換帯に沿って積雪増大域が筋状に分布する．これは積雪が上部斜面からクリープ，グライド，雪崩の各現象によって堆積した結果と推測された.

AbstractWe present the results of electrical resistivity surveys carried out to estimate seasonal variation water table level in a large-scale landslide area Tertiary geology Japan. One long profile, trending NE-SW, was established perpendicular main regional region. Three boreholes are located very close profile. The profile surveyed twice, once before snowfall and after snow had melted.The relationship between saturation pyroclastic materials clarified through laboratory tests. We did this...

Abstract This study proposes a simplified, semiempirical hydrological model of the pressure response in landslide. Various hydrometeorological variables were measured dormant landslide underlain by soft sedimentary rocks high snowfall area central Japan. We assessed whether short-term pore to water inputs rainfall and/or snowmelt can be predicted using modified linear diffusion that describes seasonal trends pressure. applied field observations and regression analysis characterize buffering...