Skyline-based geometric simplification for urban solar analysis

2018 ◽  
Vol 95 ◽  
pp. 42-50 ◽  
Author(s):  
Gonzalo Besuievsky ◽  
Benoit Beckers ◽  
Gustavo Patow
Keyword(s):  
Solar Analysis

scholarly journals The Abundance of Boron in Disk-Metallicity Stars

2000 ◽  
Vol 198 ◽  
pp. 415-424
Author(s):  
Katia Cunha
Keyword(s):  
Linear Trend ◽  
Solar Spectrum ◽  
Atomic Data ◽  
Solar Photosphere ◽  
Halo Stars ◽  
Orion Association ◽  
Solar Metallicity ◽  
Solar Analysis ◽  
Solar Ratio

Although the behavior of boron versus metallicity has been probed in a fairly large sample of halo dwarfs with HST, it is only very recently that boron abundances have been derived systematically in solar metallicity dwarfs. This effort began with a re-analysis of the solar spectrum with modern atomic data and model atmospheres so that the Sun could be adopted as a standard for the calibration of a line list in the region of the B I transition at 2497 Â. The solar analysis indicates that boron is not depleted in the solar photosphere. From a subsequent study of a sample of 14 field F/G-dwarfs with roughly solar metallicities, it is found that the behavior of boron versus [Fe/H] follows the linear trend that is observed for the halo stars. The average B/Be obtained for solar metallicity stars is 27±5 compared to the solar ratio of 23. The determination of boron abundances in the young B-type and G-type stars of the Orion association reveals a behavior of boron and oxygen in Orion that is opposite of the positive correlation which is observed for the field stars: the boron and oxygen abundances are anticorrelated.

Multi-zone indoor CFD under limited information: An approach coupling solar analysis and BIM for improved accuracy

2020 ◽  
Vol 244 ◽  
pp. 118912 ◽  
Author(s):  
Helen H.L. Kwok ◽  
Jack C.P. Cheng ◽  
Alison T.Y. Li ◽  
Jimmy C.K. Tong ◽  
Alexis K.H. Lau
Keyword(s):  
Limited Information ◽  
Solar Analysis ◽  
Improved Accuracy

scholarly journals A Method for the Automated Construction of 3D Models of Cities and Neighborhoods from Official Cadaster Data for Solar Analysis

2021 ◽  
Vol 13 (11) ◽  
pp. 6028
Author(s):  
Carlos Beltran-Velamazan ◽  
Marta Monzón-Chavarrías ◽  
Belinda López-Mesa
Keyword(s):  
3D Model ◽  
3D Models ◽  
Automatic Method ◽  
Time Saving ◽  
Automatic Construction ◽  
3D City Models ◽  
Solar Analysis ◽  
Solar Access ◽  
Short Time ◽  
City Models

3D city models are a useful tool to analyze the solar potential of neighborhoods and cities. These models are built from buildings footprints and elevation measurements. Footprints are widely available, but elevation datasets remain expensive and time-consuming to acquire. Our hypothesis is that the GIS cadastral data can be used to build a 3D model automatically, so that generating complete cities 3D models can be done in a short time with already available data. We propose a method for the automatic construction of 3D models of cities and neighborhoods from 2D cadastral data and study their usefulness for solar analysis by comparing the results with those from a hand-built model. The results show that the accuracy in evaluating solar access on pedestrian areas and solar potential on rooftops with the automatic method is close to that from the hand-built model with slight differences of 3.4% and 2.2%, respectively. On the other hand, time saving with the automatic models is significant. A neighborhood of 400,000 m2 can be built up in 30 min, 50 times faster than by hand, and an entire city of 967 km2 can be built in 8.5 h.

scholarly journals Quantifying Rooftop Solar Benefits: A State-Level Value of Solar Analysis for India

2021 ◽  
Author(s):  
Thomas Bowen ◽  
Carishma Gokhale-Welch ◽  
Karlynn Cory ◽  
Naïm Darghouth
Keyword(s):  
State Level ◽  
Solar Analysis ◽  
Rooftop Solar

scholarly journals Atomic Data and Coronal Diagnostics

1995 ◽  
Vol 10 ◽  
pp. 303-304
Author(s):  
Helen E. Mason
Keyword(s):  
Solar Wind ◽  
Recent Progress ◽  
Atomic Data ◽  
Temperature Structure ◽  
Dynamic Nature ◽  
Heliospheric Observatory ◽  
Element Abundances ◽  
Spectroscopic Diagnostics ◽  
Solar Analysis ◽  
Electron Density And Temperature

AbstractSpectroscopic diagnostics play an important role in determining the electron density and temperature structure, element abundances and dynamic nature of different features in the solar atmosphere. To ensure that these techniques are accurate it is necessary to interface solar analysis programs with the best available atomic data calculations. Recent progress in this work is presented and applications to planned space observations are discussed. In particular, the CDS and Sumer instruments, on the Solar Heliospheric Observatory, will make extensive use of spectroscopic diagnostics to study the heating processes for the solar corona and the acceleration mechanisms for the solar wind.

scholarly journals Solar Analysis Using Building Information Modelling with the Glass Box Method in Jakarta

2015 ◽  
Vol 6 (4) ◽  
pp. 481
Author(s):  
Riva Tomasowa
Keyword(s):  
Solar Radiation ◽  
Building Information Modelling ◽  
Information Modelling ◽  
Ideal Orientation ◽  
Building Information ◽  
Solar Analysis ◽  
Rich Information ◽  
Box Method ◽  
Preliminary Phase ◽  
The Ideal

The utilisation of Building Information Modelling (BIM) focuses more on the Schematic Design or Technical Design phase, while the Preliminary or the Conceptual design is pretty much skipped. This paper shows that a simple model could utilise BIM to gain rich information about solar radiation to give ideal orientation in Preliminary phase. On this case, a spot in Jakarta is analysed with Glass Box method to depict the ideal orientation that receive a minimum solar radiation in a year span.

INVESTIGATING THE APPLICABILITY OF SUSTAINABLE URBAN FORM AND DESIGN TO TRADITIONAL CITIES, CASE STUDY: THE OLD CITY OF SANA'A

2018 ◽  
Vol 12 (2) ◽  
pp. 57 ◽  
Author(s):  
Hikmat H Ali ◽  
Imad A Al-Hashimi ◽  
Fua’ad Al-Samman
Keyword(s):  
Urban Form ◽  
Quantitative Methods ◽  
Space Syntax ◽  
Basic Principles ◽  
Qualitative And Quantitative Methods ◽  
Walkability Index ◽  
Solar Analysis ◽  
Solar Access ◽  
Traditional Pattern

This research compared the traditional urban form of old Sana'a with the modern by applying three main basic principles of sustainability; 1. Form and density, 2. Walkability and connectivity and 3. Building energy. The method of inquiry was based on qualitative and quantitative methods and analysis using GIS, ECOTECT and Space Syntax modelling. The findings show that traditional form with its higher building density and compactness is a good model with regards to sustainable principles. Similarly, as to walkability index, traditional layout has higher rates of intersections and connected nodes and least angular changes with higher rates of integrations and choices in terms of Space Syntax properties than new layouts. Finally, the result of applying ECOTECT for urban solar analysis to confirm that the traditional pattern achieved sufficient values of solar access, exposure and shadows over different periods of the year. The overall results indicate that the traditional urban layout is more sustainable in terms of form and density, walkability and connectivity and urban solar energy than the new layouts.

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