21 research outputs found
Landslide History Detected Based on Forest Structure: A Case Study on Mt. Gagara, Higashi-Hiroshima
No full textVariations in tree species composition, tree density, and basal area were studied in relation to microtopography along the hills of Mt. Gagara within the campus of Hiroshima University, Higashi-Hiroshima, where landslides have occurred frequently. Ten sampling plots with a size of 100 m2 (10 m×10 m) were positioned in upper and lower parts of the hills. Tree density was significantly higher in the lower parts than in the upper parts of the hills (p < 0.001). The density of trees with smaller diameters at breast height (DBH; < 13 cm ) was significantly higher in the lower parts than in the upper parts of the hills (p < 0.001), whereas the density of large- or middlesized trees (DBH ≧ 13 cm) was signifi cantly higher in the upper parts of the hills. The species composition in the lower hills mostly consisted of early successional tree species (e.g., Eurya japonica, Pieris japonica, Ilex pedunculosa, and Rhododendron reticulatum), whereas the upper parts of the hills rarely or never included such species but mainly consisted of late successional tree species (e.g., Symplocos lucida, and Quercus glauca). These trends indicate that forest vegetation on the lower parts of the hills has been disturbed by frequently occurring erosion and landslides, which have resulted in suppressed maturity of forest structure and species succession
Photoelectric properties of ITO/p(+)-p(-)-InP solar cells in linearly polarized light
No full textIndium phosphide heterostructures and transparent conducting films of wide-gap oxides have previously been used in the development of highly efficient solar cells, making it possible to bring their efficiencies up to 18% [M, M. Koltun, Optics and Metrology of Solar Cells [in Russian], Nauka, Moscow (1985); V. M. Botnaryuk, L. S. Gagara, L. V. Gorchak et al., Geliotekhnika 23, 37 (1990); V. Botnariuc, L. Gagara, E. Negru et al., Solar Energy in Romania 2(1), 53 (1993)]. In the present paper results are reported from the first studies of the photoelectric properties, in linearly polarized light, of solar cells consisting of a heterojunction between single crystal indium phosphide and a mixed indium and tin oxide film (ITO film, E-g congruent to 3.6 eV [G. Check and A. Genis, Solid Stale Techol. 23(1), 102 (1980)]). (C) 1998 American Institute of Physics. [S1063-7842(98)01305-1]
Application of CdS Insulator Nano Layers in SIS Structures Based on pSi
No full textAbstractIt was investigated the works of SIS structures pSi-CdS-ITO in which has been found experimentaly the effect multiplication process. For created this SIS structures was used thin films CdS with ρ=109 -1010 Ω.cm and transparency 80-85% deposited by method spray pyrolysis .The layer thickness was controlled by the deposition time and consta 15-180 Aº. ITO layers was deposied on CdS layer with thicknesses 70-100 nm method spray pyrolysis too. Ohmic contacts was fored : Ni to pSi and In to ITO. At the illumination by laser light λ=0,63 µm and the flux of N=6,3.1015 s -1 cm-2 the amplification coefficient M=10-12 , the fotocurrent density was 4-6 mA/cm2
Prise En Charge Des Victimes Du Conflit Armé Du Nord Mali Dans Les Hôpitaux De Niamey
No full textObjectives: The aims of this study was to evaluate the management of lesions in victims of the malian conflict patients admitted to Niamey hospitals. Methods: A retrospective study was conducted in Niamey hospitals from January 1st, 2012 to December, 31th, 2013. Data collected included âge, sex, means of transport, topography of trauma, treatment and outcome. Results: The sample included fifty one (51) patients. All patients were male; the mean age was 29,5 years ± 9 years, ranging from 17-71 years. The age between 26 and 35 were most affected in 47% of cases (24 patients), soldiers represented 72.54% (37 patients); and civils 27.45% (14 patients). 74.50% of our patients (38) were been transported in Niamey by aircraft. The trauma concerned the members in 54.90% (28 cases), canio facial in 17.60% (9 cases), abdomen in 11.80% (6 cases). We observed only one polytrauma. 66.66% (34) of patients were injured by firearms, 29.41% (15) by accidents of roads, 3,93% by burn (2 patients). The lesions found were bone in 41.17% (21 patients), skin-muscle in 35.29% (18 patients), visceral in 9.80% (5 patients). Five patients died (9.80%). Conclusion: the internationalization of conflicts requires a reorganization of the care by involving all the nearness health structures in order to ensure adequate care and neutrality
Epidemiological, clinical and therapeutical aspects of road traffic accident in 1034 children admitted at Niamey National Hospital - Niger
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Aspects radiographiques de la tuberculose pulmonaire à microscopie positive nouveaux cas et retraitement dans le service de pneumo-phtisiologue (SPP) de l’hôpital national Lamordé (HNL)
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