48 research outputs found
D'Oursi à Gagara : transposition d'un modèle de ruissellement dans le Sahel (Burkina Faso)
No full textUne modélisation des crues avait été réalisée sur le bassin versant de Polaka (mare d'Oursi, Burkina Faso, Chevallier et al., 1985) en utilisant le modèle à discrétisation spatiale (Girard et al., 1981) dans lequel les nouvelles techniques de la télédétection et de la simulation de pluies avaient été introduites. La même méthode de modélisation a été appliquée aux bassins de Gagara situés à une quarantaine de kilomètres à l'est. La cartographie des états de surface par télédétection satellitaire est faite en utilisant les mêmes critères qu'à Polaka. Les fonctions de production établies à Polaka pour différents états de surface à partir des résultats de simulation de pluies sur parcelles ont été appliquées sans aucune adaptation. La reconstitution des hydrogrammes de crues obtenue sur un petit pas de temps est tout à fait acceptable. Une simulation permet d'établir les hydrogrammes d'une crue d'étude pour différents états d'humectation du sol. (Résumé d'auteur
D'Oursi à Gagara : transposition d'un modèle de ruissellement dans le Sahel (Burkina Faso)
No full textUne modélisation des crues avait été réalisée sur le bassin versant de Polaka (mare d'Oursi, Burkina Faso, Chevallier et al., 1985) en utilisant le modèle à discrétisation spatiale (Girard et al., 1981) dans lequel les nouvelles techniques de la télédétection et de la simulation de pluies avaient été introduites. La même méthode de modélisation a été appliquée aux bassins de Gagara situés à une quarantaine de kilomètres à l'est. La cartographie des états de surface par télédétection satellitaire est faite en utilisant les mêmes critères qu'à Polaka. Les fonctions de production établies à Polaka pour différents états de surface à partir des résultats de simulation de pluies sur parcelles ont été appliquées sans aucune adaptation. La reconstitution des hydrogrammes de crues obtenue sur un petit pas de temps est tout à fait acceptable. Une simulation permet d'établir les hydrogrammes d'une crue d'étude pour différents états d'humectation du sol. (Résumé d'auteur
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
Oro Gagara-Popondetta
No full textIndigenous art work. Philemon Yalamu comes from Morobe/ Madang provinces of Papua New Guinea (PNG). PNG is situated north of Australia and is known to be the world's most linguistically diverse nation with thousands of tribes and diverse cultures. Philemon's academic and professional journey began as a visual artist. At university, he was introduced to graphic design and digital media and upon completing his bachelors in Arts (Arts and Design) at the University of Papua New Guinea (UPNG) in 2003, he was employed by UPNG as an academic, coordinating Graphics and multimedia design courses the following year. Philemon decided to pursue further studies at Swinburne University of Technology to do Master of Multimedia (MMm) under the Australia Awards Scholarships program in 2009 and graduated in 2010 with a Master of Multimedia degree. He was recognised for his high academic achievements in 2010, and was nominated by the Swinburne Graduation Committee to represent the graduands in giving the student response speech. Philemon went back to PNG and continued as an academic at UPNG taking leadership roles in various community outreach projects. Later in 2017, Philemon returned to Swinburne University of Technology to do his PhD research. He was initially enrolled in the Faculty of Health, Arts and Design (FHAD), then later transferred to the Faculty of Science, Engineering and Technology (FSET) where he completed his PhD research. His research interest is in Human Computer Interaction (HCI) and the area of focus is student engagement via LMS interfaces. Philemon grew up spending time learning about the different cultures and tribes in Papua New Guinea. He is inspired by the beauty and diversity of PNG's rich cultural heritage and captures it in his visual art pieces, such as in paintings, other interactive media works and software interfaces. Besides, Philemon likes to use art as a therapy to help eliminate or relieve stress that others may have. He believes that art can forge a bond between a person's mind and body. Painting is just one of many skills Philemon possess. In most of the paintings, Philemon shares PNG’s cultural diversity through the rich and vibrant colours that he uses in his paintings. His paintings depict various tribes of Papua New Guinea, from the highlands, to the coast, and to the island region
Using the experience of information support for innovation activity in developed countries
No full textPhotoelectric 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
Prevalence of peste des petits ruminants in the arid zone in the Republic of Niger
No full textThe study aimed to determine the prevalence of peste des petits ruminants in the arid zone (Niamey, Tillabéry and Tahoua) of the Republic of Niger. A serological survey was conducted and 519 serum samples were collected from 253 unvaccinated sheep and 266 unvaccinated goats. The sample included 340 female animals (168 sheep and 172 goats) and 160 kids and lambs (78 lambs and 82 kids). A competitive enzyme-linked immunosorbent assay yielded an overall seroprevalence of 45.0%. The prevalence in sheep was 42.0% compared with 47.9% in goats. The seroprevalence observed amongst small ruminants in Tahoua (49.8%) and Tillabéry (46.6%) was significantly higher (p = 0.001) than that observed in animals from Niamey (25.1%). It was also higher (p = 0.04) in sheep younger than two years (51.8%) than in adults (37.6%). Conversely, the seroprevalence showed no significant difference between male animals (35.8% in sheep; 50.1% in goats) and female animals (45.1% in sheep; 46.4% in goats). The prevalence of the disease observed amongst the sheep and goat populations confirms the continued danger of this disease in the areas studied. It is therefore necessary to develop strategies such as improving livestock services, providing effective vaccines and implementing a vaccination programme for an effective control of the disease in sub-Saharan Africa
Synthesis Technology for CdSe/CdTe Heterojunctions and Characterization of Their Photoelectric Properties
No full textAcces full text - https://doi.org/10.1007/978-3-031-42775-6_23This paper presents the results of studying the photoelectric properties of CdSe/CdTe heterojunctions synthesized by the hot-wall epitaxy method. The CdSe/CdTe heterojunctions were manufactured by consecutive growth of CdSe and CdTe layers on a conductive ITO/glass substrate purchased from Solaronix Swiss. As ohmic contact for CdTe, Ni was deposited by thermal evaporation. The CdSe layer thickness (1–3 µm) was controlled according to the time of deposition of the layer. The temperature of the substrate and the source for CdTe growing were 400 ℃ and 520 ℃, respectively and reached the thickness 15 µm. The synthesis process for heterojunctions with CdTe layers includes the treatment of the entire structure in a CdCl2 solution, followed by annealing in air at a temperature of 450 ℃ for 30 min. Upon the deposition of CdTe layer, due to the diffusion of Se into the growing CdTe film, a transition layer of the CdSexTe1–x solid solution is formed at the interface, evidenced by the spectral dependence of the photocurrent. The investigation of the current-voltage characteristics at different intensity of illuminations shown that nonideality factor n has a value of 1.7–2.0, which indicate a generation-recombination mechanism of current in the CdSe/CdTe heterojunctions. The best photovoltaic parameters for CdSe/CdTe heterojunctions were achieved for structures with thicker CdSe layer and are as follows: JSC = 24.6 mA/cm2, UOC = 730 mV, FF = 0.5, η = 7.6%
Role of the dosed walking in the physical rehabilitation of children with bronchial asthma
No full textThe results of research of influence on the respiratory system of children are presented with bronchial asthma of complex of methods of physical rehabilitation. In research 20 children took part 10-11 years. To put got the complex of rehabilitation measures, which included medical physical education. The complex of respiratory gymnastics was directed on the improvement of functioning of the respiratory system, improvement of function of the external breathing, increase of excursion of thorax and strengthening of respiratory muscles. Exercises of this complex were executed children in a slow rate with an accent on control of breathing during implementation of exercises. Additionally conducted engaged in the dosed walking and the special dynamic respiratory exercises were executed on the method of Tolkachev. The indexes of the functional state of the respiratory system of children are appraised. It is set that for patients the indexes of excursion of thorax were increased, vital capacity of lights, forced vital capacity of lights, volume of the forced exhalation for the first second, by volume speed of spades, index of Tifno
