Conferencia impartida por Sebastián Sánchez en los Viernes Científicos organizada por la Facultad de Ciencias Experimentales de la Universidad de Almería el 14 de enero de 2011.
Conferencia impartida por Sebastián Sánchez en los Viernes Científicos organizada por la Facultad de Ciencias Experimentales de la Universidad de Almería el 14 de enero de 2011.
Solar resource measurements and sattelite dataSolarReference
To access explanatory notes and download link, head to -
http://solarreference.com/all-you-need-to-know-about-solar-resource-measurement/
This presentation can also be downloaded for SFERA website (SFERA Summer School 2013). Amazing, concise, to the point document. For more quality resources, visit
http://solarreference.com
Multispectral remote sensors such as the Landsat Thematic Mapper and SPOT XS produce
images with a few relatively broad wavelength bands. Hyperspectral remote sensors, on the
other hand, collect image data simultaneously in dozens or hundreds of narrow, adjacent
spectral bands. These measurements make it possible to derive a continuous spectrum for each
image cell, as shown in the illustration below. After adjustments for sensor, atmospheric, and
terrain effects are applied, these image spectra can be compared with field or laboratory
reflectance spectra in order to recognize and map surface materials such as particular types of
vegetation or diagnostic minerals associated with ore deposits.
Solar resource measurements and sattelite dataSolarReference
To access explanatory notes and download link, head to -
http://solarreference.com/all-you-need-to-know-about-solar-resource-measurement/
This presentation can also be downloaded for SFERA website (SFERA Summer School 2013). Amazing, concise, to the point document. For more quality resources, visit
http://solarreference.com
Multispectral remote sensors such as the Landsat Thematic Mapper and SPOT XS produce
images with a few relatively broad wavelength bands. Hyperspectral remote sensors, on the
other hand, collect image data simultaneously in dozens or hundreds of narrow, adjacent
spectral bands. These measurements make it possible to derive a continuous spectrum for each
image cell, as shown in the illustration below. After adjustments for sensor, atmospheric, and
terrain effects are applied, these image spectra can be compared with field or laboratory
reflectance spectra in order to recognize and map surface materials such as particular types of
vegetation or diagnostic minerals associated with ore deposits.
Control N degrees of freedom with a unique actuator (1DOF) by introducing noise into the others DOF through mechanical coupling, reducing the noise intensity as it get close to the target in phase-space. It is easier to build directional sensors than directional actuators. Simulated robots produce graphic patterns.
Presentation made by Prof. Adriano Camps (Universitat Politècnica de Catalunya) at ICMARS 2010 (India, 16-December-2010) on the MIRAS instrument aboard ESA's SMOS mission.
A coupled Electromagnetic-Mechanical analysis of next generation Radio Telesc...Altair
This work considers the design of large and complex receivers used in the field of radio astronomy, e.g. for the Square Kilometer Array (SKA) project. The purpose of this work is to consider a coupled simulation where the electromagnetic analysis, performed with the computational electromagnetic software package FEKO, is enhanced by the structural analysis offered by HyperWorks products such as HyperMesh and Optistruct. External influences such as gravity, wind-loading and thermal properties will be taken into account. This will enhance the electromagnetic simulation results, thereby aiding designers to mitigate these environmental effects.
Speakers
Dr. Danie Ludick, Postdoctoral researcher, Stellenbosch University
Volumetric Lighting for Many Lights in Lords of the FallenBenjamin Glatzel
In this session I’m going to give you an in-depth insight into the design and the implementation of the volumetric lighting system we’ve developed for ‘Lords of the Fallen’. The system allows the simulation of countless volumetric lighting effects in parallel while still being a feasible solution on next-gen consoles.
This presentation was held at the Digital Dragons 2014 conference.
Videos shown during the talk are available here: http://bglatzel.movingblocks.net/publications
Ill-posedness formulation of the emission source localization in the radio- d...Ahmed Ammar Rebai PhD
To contact the authors : tarek.salhi@gmail.com and ahmed.rebai2@gmail.com
In the field of radio detection in astroparticle physics, many studies have shown the strong dependence of the solution of the radio-transient sources localization problem (the radio-shower time of arrival on antennas) such solutions are purely numerical artifacts. Based on a detailed analysis of some already published results of radio-detection experiments like : CODALEMA 3 in France, AERA in Argentina and TREND in China, we demonstrate the ill-posed character of this problem in the sens of Hadamard. Two approaches have been used as the existence of solutions degeneration and the bad conditioning of the mathematical formulation problem. A comparison between experimental results and simulations have been made, to highlight the mathematical studies. Many properties of the non-linear least square function are discussed such as the configuration of the set of solutions and the bias.
The SpaceDrive Project - First Results on EMDrive and Mach-Effect ThrustersSérgio Sacani
Propellantless propulsion is believed to be the best option for interstellar travel. However, photon rockets or solar sails have thrusts so low that maybe only nano-scaled spacecraft may reach the next star within our lifetime using very high-power laser beams. Following into the footsteps of earlier breakthrough propulsion programs, we are investigating different concepts based on non-classical/revolutionary propulsion ideas that claim to be at least an order of magnitude more efficient in producing thrust compared to photon rockets. Our intention is to develop an excellent research infrastructure to test new ideas and measure thrusts and/or artefacts with high confidence to determine if a concept works and if it does how to scale it up. At present, we are focusing on two possible revolutionary concepts: The EMDrive and the Mach-Effect Thruster. The first concept uses microwaves in a truncated cone-shaped cavity that is claimed to produce thrust. Although it is not clear on which theoretical basis this can work, several experimental tests have been reported in the literature, which warrants a closer examination. The second concept is believed to generate mass fluctuations in a piezo-crystal stack that creates non-zero time-averaged thrusts. Here we are reporting first results of our improved thrust balance as well as EMDrive and Mach-Effect thruster models. Special attention is given to the investigation and identification of error sources that cause false thrust signals. Our results show that the magnetic interaction from not sufficiently shielded cables or thrusters are a major factor that needs to be taken into account for proper μN thrust measurements for these type of devices.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
2. yt is a Python-based platform for analysis and
visualization of astrophysical simulation data
Turk et al. 2011, ApJS, 192, 9
Turk & Smith 2011, arXiv:1112.4482
3. !
yt is designed to address physical,
not computational,
questions
4. “What is the average mass weighted temperature of the gas within a sphere of
radius 100 kpc, centered at the maximum gas density? Oh, and I want it in keV.”
from yt.mods import *
from yt.utilities.physical_constants import kboltz
!
ds = load("IsolatedGalaxy/galaxy0030/galaxy0030")
!
sp = ds.h.sphere("max", (100, “kpc”))
!
T = sp.quantities[“WeightedAverageQuantity”](“temperature”, “cell_mass”)
!
print (kboltz*T).in_units(“keV”)
8. Method: PHOX
• Method developed by Veronica Biffi, Klaus
Dolag (http://www.mpa-garching.mpg.de/
~kdolag/Phox/)
• Biffi,V., Dolag, K., Bohringer, H., & Lemson, G.
2012, MNRAS, 420, 3545
• Biffi,V., Dolag, K., Bohringer, H. 2013, MNRAS,
428, 1395
9. Three Steps:
1. Generate a very large number of photons
from an appropriate spectral model for each
cell
2. Project photons along a chosen line of sight,
Doppler and cosmologically shift their
energies. Apply galactic absorption.
3. Convolve photons with instrument models.
10. Step 1
• First, we define a spectral model.
• There are interfaces within the code to use:
• PyXspec (https://heasarc.gsfc.nasa.gov/
xanadu/xspec/python/html/)
• AtomDB (http://www.atomdb.org)
• There is flexibility to include other model
sources
11. Step 1
• In the first step we generate a lot of photons, many
more than would be in a typical observation (at least
~10x more)
• To make this precise, we specify a very large collecting
area and a very long exposure time, along with a source
distance
• These photons become a Monte-Carlo sample which
will be used to make the actual observation
• Typically, we will store them to disk, also saving the
positions and velocities of the gas they originated from
12. Three Steps:
1. Generate a very large number of photons
from an appropriate spectral model for each
cell
2. Project photons along a chosen line of sight,
Doppler and cosmologically shift their
energies. Apply galactic absorption. Correct
for exposure time and effective area.
3. Convolve photons with instrument models.
13. Step 2
• Using the saved positions, energies, and velocities,
we can project them along a line of sight, and use
the gas velocities to Doppler-shift them.
• We also apply cosmological redshift for distant
sources, and galactic foreground absorption
(tbabs, wabs, etc.)
• Here is where we use the actual effective area
(constant or from an ARF) and exposure time of
the desired observation
14. Three Steps:
1. Generate a very large number of photons
from an appropriate spectral model for each
cell
2. Project photons along a chosen line of sight,
Doppler and cosmologically shift their
energies. Apply galactic absorption. Correct
for exposure time and effective area.
3. Convolve photons with instrument models.
15. Step 3
• The photon simulator module provides a
way to simply convolve with a ARF/RMF
pair, to get a quick-and-dirty observation
• If you want to accurately simulate a
particular detector, you can export the
generated events to files that can be read in
by instrument simulators
16. Step 3
• SIMX: http://hea-www.harvard.edu/simx/
• Not a full raytrace, but a predefined set of
PSFs, vignetting information, and instrumental
responses and outputs to make the simulation.
• yt exports SIMPUT files of (x,y,E) that can be
read in by SIMX
• http://hea-www.harvard.edu/heasarc/formats/
simput-1.1.0.pdf
17. Advantages
• Most expensive step (generating the
photons) happens in 3D, and only needs to
be done (in most cases) ONCE.
• Different projections, different exposure
times, different instruments simulated from
the same set of photons (computationally
cheaper)
• It runs in parallel using MPI
24. To Get yt
• http://yt-project.org/#getyt
• I recommend using the install script:
1. wget http://hg.yt-project.org/yt/raw/yt/
doc/install_script.sh
2. bash install_script.sh
3. source YT_DEST/bin/activate
25. To Get Help
Email Me:
jzuhone@milkyway.gsfc.nasa.gov
!
Photon Simulator Documentation:
http://yt-project.org/doc/analyzing/analysis_modules/
photon_simulator.html
!
Website:
http://yt-project.org
!
Mailing List (yt-users):
http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org