Search results for " cloud"
showing 10 items of 294 documents
Cloud top altitude retrieved from Lidar measurements during ACLOUD at 1 second resolution
2021
During the ACLOUD aircraft campaign (23.5.2017 - 26.6.2017) the AMALi Lidar was installed mostly nadir pointing. This dataset contains the cloud top altitude from those measurements (altitudes with a strong signal increase) as well as a cloud mask, derived from the optical depth of the column at 1 second resolution. The majority of the data was collected northwest of the Svalbard archipelago. More details on the campaign can be found in Wendisch 2018 and Ehrlich 2019 and here (https://home.uni-leipzig.de/~ehrlich/ACLOUD_wiki_doku). Please check the data documentation (https://download.pangaea.de/reference/108729/attachments/readme_documentation_AMALi_cloudtop.pdf) before using this dataset.
Pan-cancer analysis of whole genomes
2020
Publisher's version (útgefin grein)
Bollard Segmentation and Position Estimation From Lidar Point Cloud for Autonomous Mooring
2022
This article presents a computer-aided object detection and localization method from lidar 3-D point cloud data. This topic of interest is in the framework of autonomous mooring, where the ship is tied to the rigid structure on-shore (bollard) for autonomous maritime navigation. Using shape and features priors, unlike matching the whole object template to the experimental 3-D point cloud representation of the scene, two customized algorithms: 1) 3-D feature matching (3-DFM) and 2) mixed feature-correspondence matching (MFCM) are presented. The proposed algorithms discriminate and extract the 3-D points corresponding to the noncooperative bollard's surface from the background, thus capable o…
The vertical profile of condensation nuclei on cloudy days
2008
Genetic algorithms for 3d reconstruction with supershapes
2009
Supershape model is a recent primitive that represents numerous 3D shapes with several symmetry axes. The main interest of this model is its capability to reconstruct more complex shape than superquadric model with only one implicit equation. In this paper we propose a genetic algorithms to re-construct a point cloud using those primitives. We used the pseudo-Euclidean distance to introduce a threshold to handle real data imperfection and speed up the process. Simulations using our proposed fitness functions and a fitness function based on inside-outside function show that our fitness function based on the pseudo-Euclidean distance performs better.
Sudrabaino mākoņu novērojumi Latvijā 1957.-1983.gadā: žurnālu saturs un digitalizēšanas metodika
2022
Latvijas Astronomijas biedrības arhīvā glabājas mezosfēras mākoņu (MC) novērojumu žurnāli par laika posmu no 1957. līdz 1983. gadam.. Tā kā pēdējos gados ir pieaugusi interese par MK novērojumu vēsturisko statistiku klimata pārmaiņu kontekstā, ir veikta šo žurnālu digitalizācija. Materiālā ir aprakstīts novērojumu žurnālu saturs un to digitalizācijas metodika. Paši digitalizētie žurnāli ir pieejami šajā LU repozitorija kolekcijā, kā MS Excel faili.
Novērotāju piezīmes, kas apjoma dēļ nav ievietotas tieši digitalizētajos žurnālos
2022
Mezosfēras mākoņu novērojumos sastopamas novērotāju piezīmes, kas sava apjoma dēļ nav ievietojamas žurnāla failā. Vairākos gadījumos novērotāji žurnālos ir arī pievienojuši grafiskas skices. Attiecīgās piezīmes tāpēc ievietotas atsevišķā teksta failā. Tās attiecas uz visu novērojumu periodu no 1957. līdz 1983.gadam un ir sakārtotas hronoloģiskā secībā. --//-- Mesospheric Cloud observation logs contain notes made by observers in the form of longer texts or graphic sketches. They are not included in the log files, as it would make them difficult to see and use. This volume contains notes on the entire observation period 1957-1983. They are arranged by observation sites in chronological order.
Dust Production and Particle Acceleration in Supernova 1987A Revealed with ALMA
2013
Supernova (SN) explosions are crucial engines driving the evolution of galaxies by shock heating gas, increasing the metallicity, creating dust, and accelerating energetic particles. In 2012 we used the Atacama Large Millimeter/Submillimeter Array to observe SN 1987A, one of the best-observed supernovae since the invention of the telescope. We present spatially resolved images at 450um, 870um, 1.4mm, and 2.8mm, an important transition wavelength range. Longer wavelength emission is dominated by synchrotron radiation from shock-accelerated particles, shorter wavelengths by emission from the largest mass of dust measured in a supernova remnant (>0.2Msun). For the first time we show unambig…
NATO ARW on Clouds — Session Summaries
1996
The two papers presented in this session focused on the role of dynamics in the water vapor distribution of the tropics and its implications to climate.
Mākoņpakalpojumu sniedzēju salīdzinājums “TIA” apdrošināšanas sistēmai
2021
Mūsdienās vairākas organizācijas vēlas atteikties no savas infrastruktūras, pārceļot izmantotos risinājumus mākoņpakalpojumu sniedzēju platformās, lai nodrošinātu labāku ātrdarbību, mērogojamību, pieejamību vai, piemēram, vienkārši samazinātu sistēmu uzturēšanas izmaksas. Autors ir piedalījies projektā, kurā tika veikta TIA Technology izstrādātās apdrošināšanas sistēmas TIA tehniskā analīze paralēli tās izstrādei ar mērķi to migrēt uz mākoņpakalpojumu platformu Microsoft Azure vai Oracle Cloud, analīzes rezultātā attiecīgajai TIA implementācijai arī veicot visu izstrādes procesā iesaistīto komponenšu migrāciju uz Oracle Cloud. Šī darba gaitā autors apskatīja Oracle Cloud un Microsoft Azure …