Search results for "FOT"
showing 10 items of 1161 documents
Nanostrukturēta titāna dioksīda izmantošana oglekļa dioksīda reducēšanai
2017
. Nanostrukturēta titāda dioksīda izmantošana oglekļa dioksīda reducēšanai. Grauduma I, zinātniskie vadītāji Dr phys. Kleperis J., PhD students. Knoks A. Maģistra darbs, 80 lappuses, 63 attēli, 11 tabulas, 27 literatūras avoti. Latviešu valodā. Darbā veikts pārskats par globālās sasilšanas cēloņiem un siltumnīcas efekta gāzēm. Apskatīti veidi, kā samazināt oglekļa dioksīda (CO2) piesārņojumu atmosfērā, vienlaikus ražojot derīgus savienojumus. Pētītas titāna dioksīda (TiO2) nanostruktūru iegūšanas iespējas un to modifikācija optisko un ķīmisko īpašību uzlabošanai. Aplūkota CO2 fotokatalītiskas reducēšanas reakcija TiO2 fotokatalizatora un ultravioletā (UV) apgaismojuma klātbūtnē, kā arī dažā…
Rainfall and water yield in Macizo del Caroig, Eastern Iberian Peninsula. Event runoff at plot scale during a rare flash flood at the Barranco de Ben…
2021
[EN] Floods are a consequence of extreme rainfall events. Although surface runoff generation is the origin of discharge, flood research usually focuses on lowlands where the impact is higher. Runoff and sediment delivery at slope and pedon scale receiving much less attention in the effort to understand flood behaviour in time and space. This is especially relevant in areas where, due to climatic and hydrogeological conditions, streams are ephemeral, so-called dry rivers (¿wadis¿, "ramblas" or ¿barrancos¿) that are widespread throughout the Mediterranean. This paper researches the relationship between water delivery at pedon and slope scale with dry river floods in Macizo del Caroig, Eastern…
Raman spectroscopy and crystal-field split rotational states of photoproducts CO and H2 after dissociation of formaldehyde in solid argon
2012
Raman signal is monitored after 248 nm photodissociation of formaldehyde in solid Ar at temperatures of 9–30 K. Rotational transitions J = 2 ← 0 for para-H2 fragments and J = 3 ← 1 for ortho-H2 are observed as sharp peaks at 347.2 cm−1 and 578.3 cm−1, respectively, which both are accompanied by a broader shoulder band that shows a split structure. The rovibrational spectrum of CO fragments has transitions at 2136.5 cm−1, 2138.3 cm−1, 2139.9 cm−1, and 2149 cm−1. To explain the observations, we performed adiabatic rotational potential calculations to simulate the Raman spectrum. The simulations indicate that the splitting of rotational transitions is a site effect, where H2 molecules can resi…
L'esperienza immersiva e le sue ragioni
2021
"L'idea di immersività" che emerge dai volumi: Nel centro del quadro di Bruno Di Marino e "Immagine, arte, virtualità" di Roberto Diodato "The idea of immersiveness" that emerges from the volumes: In the center of the painting by Bruno Di Marino and "Image, art, virtuality" by Roberto Diodato
Indirect evaluation of pit and fissure sealants: a 3D-based method validation
2019
Background The aim of the present study was to compare indirect methods to assess the clinical performance of pit and fissure sealants and validate the use of 3D scanners. Material and Methods Sample consisted of 58 plaster models of upper and lower first permanent molars, sealed with resin sealants, as well as photographs obtained during the 18-month follow-up. Pre-established criteria were applied to categorize the sealant presence/absence and marginal integrity. Two calibrated examiners performed the evaluations, independently, using Scanning Electron Microscopy (SEM; gold-standard), Photography, 3D (CEREC In Lab) and Stereomicroscope analysis. Results The intra-examiner Spearman correla…
Assessment of Classifiers and Remote Sensing Features of Hyperspectral Imagery and Stereo-Photogrammetric Point Clouds for Recognition of Tree Specie…
2018
Recognition of tree species and geospatial information on tree species composition is essential for forest management. In this study, tree species recognition was examined using hyperspectral imagery from visible to near-infrared (VNIR) and short-wave infrared (SWIR) camera sensors in combination with a 3D photogrammetric canopy surface model based on RGB camera stereo-imagery. An arboretum with a diverse selection of 26 tree species from 14 genera was used as a test area. Aerial hyperspectral imagery and high spatial resolution photogrammetric color imagery were acquired from the test area using unmanned aerial vehicle (UAV) borne sensors. Hyperspectral imagery was processed to calibrated …
Reflexiones en torno a imágenes con desnudo infantil : análisis fotográfico de Klara and Edda Belly Dancing
2014
Klara and Edda Belly Dancing es una fotografía tomada en Berlín por la artista Nan Goldin en 1998. Forma parte de la serie De aquí a la maternidad, incluida en la exposición retrospectiva El Patio del Diablo, cuyas fotografías fueron publicadas en 2003 por Phaidon en un libro con el mismo título que recoge imágenes inéditas de sus series fotográficas. La imagen muestra a dos niñas jugando en una cocina, una de ellas, de unos seis años, medio vestida con un pañuelo transparente anudado a la cintura, está de pie en el centro de la imagen, mientras la otra, de menor edad, a sus pies está desnuda en el suelo; con su improvisado disfraz bailan la danza del vientre. Una imagen cuya exposición fue…
La aldea maldita y la cultura fin de siglo
2004
Este artículo pretende ser una reflexión sobre la posible influencia de la literatura y sobre todo de las artes plásticas-fotografía del fin de siglo y aledaños, en una de las películas españolas más apreciadas del período silente. El análisis se inscribe por tanto en esa amplia esfera de constante interrelación entre el cine y el resto de disciplinas artísticas, en la que quedan todavía muchos caminos por explorar. (A)
Efficient vacuum deposited p-i-n and n-i-p perovskite solar cells employing doped charge transport layers
2016
Methylammonium lead halide perovskites have emerged as high performance photovoltaic materials. Most of these solar cells are prepared via solution-processing and record efficiencies (>20%) have been obtained employing perovskites with mixed halides and organic cations on (mesoscopic) metal oxides. Here, we demonstrate fully vacuum deposited planar perovskite solar cells by depositing methylammonium lead iodide in between intrinsic and doped organic charge transport molecules. Two configurations, one inverted with respect to the other, p-i-n and n-i-p, are prepared and optimized leading to planar solar cells without hysteresis and very high efficiencies, 16.5% and 20%, respectively. It is t…
Energie rinnovabili e trasformazioni territoriali: il caso del fotovoltaico in Sicilia
2021
La presente comunicazione intende trattare il tema delle trasformazioni territoriali sono avvenute negli ultimi due decenni in Sicilia, in seguito alla costruzione di centinaia di impianti fotovoltaici di piccole, medie e grandi dimensioni. Tali impianti sono stati costruiti causando spesso profondi mutamenti paesaggio, con trasformazioni territoriali che non hanno tenuto conto delle caratteristiche di produttività dei suoli, della vicinanza di aree protette e siti della Rete Natura 2000 e soprattutto senza il reale coinvolgimento delle comunità locali che spesso hanno subito passivamente tali trasformazioni. Gli strumenti di pianificazione territoriale, quali il Piano Paesistico Regionale,…