in this paper, calcium stannate nanoparticles were synthesized by a fast and simple co-precipitation procedure. for casno3 preparation ammonia was used as precipitation agent. the effect of various surfactants such as cationic, anionic and neutral on the morphology of the products was investigated. by changing in ca(sal)2 as a new precursor different morphologies were obtained. ligand as a capp...

BACKGROUND In eukaryotes the photosynthetic antenna system is composed of subunits encoded by the light harvesting complex (Lhc) multigene family. These proteins play a key role in photosynthesis and are involved in both light harvesting and photoprotection. The moss Physcomitrella patens is a member of a lineage that diverged from seed plants early after land colonization and therefore by stud...

Our study provides insight into modelling and assessment of a digital surface model of experimental plot. An unmanned aerial vehicle equipped with low-cost RGB camera was used. The camera system made it possible to acquire very high resolution imagery to generate ortho-mosaics and digital surface models through automatic 3D photo-reconstruction methods by Agisoft Photoscan solution. The unmanne...

A ca. 1980 national-scale land-cover classification based on aerial photo interpretation was combined with 2000 AVHRR satellite imagery to derive land cover and land-cover change information for forest, urban, and agriculture categories over a seven-state region in the U.S. To derive useful land-cover change data using a heterogeneous dataset and to validate our results, we a) stratified the cl...

Franz Leberl Philipp Meixner Andreas Wendel Arnold Irschara Graz University of Technology Institute for Computer Graphics and Vision Inffeldgasse 16 A-8010 Graz, Austria E-mail: [email protected] Abstract. The location-aware Internet is inspiring intensive work addressing the automated assembly of three-dimensional models of urban spaces with their buildings, circulation spaces, vegetation, ...

This project seeks to propose a drone system improve security in Bogotá, given that insecurity rates have increased significantly recent years and even more so the COVID-19 pandemic. The proposal is based on having an integrated with special characteristics face different situations, drones would be equipped non-lethal weapons, photo captures for facial vehicle scanning, real-time location send...

In glacial environments particle-size analysis of moraines provides insights into clast origin, transport history, depositional mechanism and processes of reworking. Traditional methods for grain-size classification are labour-intensive, physically intrusive and are limited to patch-scale (1m) observation. We develop emerging, high-resolution groundand unmanned aerial vehicle-based ‘Structure-f...

Various methods have been developed to measure three-dimensional (3D) objects and obtain a highaccuracy Digital Surface Model (DSM). High-quality elevation data is essential to support urban planning and civil engineering, however, effective measuring of height information is still challenging. The aim of this paper is to present an accuracy assessment of laser scanned data and the enhancement ...

The problem of extracting continuous structures from noisy or cluttered images is a difficult one. Successful extraction depends critically on the ability to balance prior constraints on continuity and smoothness against evidence garnered from image analysis. Exact, deterministic optimisation algorithms, based on discretized functionals, suffer from severe limitations on the form of prior const...

Image-based modeling techniques [1], [2], [3] can now generate photo-realistic 3D models from images. But it is up to users to provide high quality images with good coverage and view overlap, which makes the data capturing process tedious and time consuming. We seek to automate data capturing for image-based modeling. The core of our system is an iterative linear method to solve the multi-view ...