The shadows cast by buildings and towers in cities and by montains in the countryside
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Ensino de Física (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172003000100008 |
Resumo: | ABSTRACT Often astronomers of the Observatório Nacional are asked about how the shadow cast from a building or a tower to be built will impact crowded areas; in which way they would interfere with the wellfare by depriving population from sunlight. The same problem arises when agronomers plan areas for cultures when topographical accidents may cast shadows in a geographic region. My colleages usually answer these questions by delivering spherical trigonometry formulae and the sun equations of movement, and therefore they transfer the responsability of the conclusions back to the engineers and agronomers. What we didnt realize is the possible and even probable difficulties that these professionals could be facing, since fundamental astronomy and astronomical object positioning knowledge is needed to figure out how the sun moves in the celestial sphere. Shadow projection and its mapping on a ground plan also requires specific knowledge. This paper intends to introduce solutions that will offer professionals, teachers and students conditions of better understanding this problem and, possibly, at least in some cases, bypass the need for quering astronomers. |
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The shadows cast by buildings and towers in cities and by montains in the countrysideABSTRACT Often astronomers of the Observatório Nacional are asked about how the shadow cast from a building or a tower to be built will impact crowded areas; in which way they would interfere with the wellfare by depriving population from sunlight. The same problem arises when agronomers plan areas for cultures when topographical accidents may cast shadows in a geographic region. My colleages usually answer these questions by delivering spherical trigonometry formulae and the sun equations of movement, and therefore they transfer the responsability of the conclusions back to the engineers and agronomers. What we didnt realize is the possible and even probable difficulties that these professionals could be facing, since fundamental astronomy and astronomical object positioning knowledge is needed to figure out how the sun moves in the celestial sphere. Shadow projection and its mapping on a ground plan also requires specific knowledge. This paper intends to introduce solutions that will offer professionals, teachers and students conditions of better understanding this problem and, possibly, at least in some cases, bypass the need for quering astronomers.Sociedade Brasileira de Física2003-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172003000100008Revista Brasileira de Ensino de Física v.25 n.1 2003reponame:Revista Brasileira de Ensino de Física (Online)instname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S1806-11172003000100008info:eu-repo/semantics/openAccessMoreira,João Luiz Kohleng2003-05-20T00:00:00Zoai:scielo:S1806-11172003000100008Revistahttp://www.sbfisica.org.br/rbef/https://old.scielo.br/oai/scielo-oai.php||marcio@sbfisica.org.br1806-91261806-1117opendoar:2003-05-20T00:00Revista Brasileira de Ensino de Física (Online) - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
The shadows cast by buildings and towers in cities and by montains in the countryside |
title |
The shadows cast by buildings and towers in cities and by montains in the countryside |
spellingShingle |
The shadows cast by buildings and towers in cities and by montains in the countryside Moreira,João Luiz Kohl |
title_short |
The shadows cast by buildings and towers in cities and by montains in the countryside |
title_full |
The shadows cast by buildings and towers in cities and by montains in the countryside |
title_fullStr |
The shadows cast by buildings and towers in cities and by montains in the countryside |
title_full_unstemmed |
The shadows cast by buildings and towers in cities and by montains in the countryside |
title_sort |
The shadows cast by buildings and towers in cities and by montains in the countryside |
author |
Moreira,João Luiz Kohl |
author_facet |
Moreira,João Luiz Kohl |
author_role |
author |
dc.contributor.author.fl_str_mv |
Moreira,João Luiz Kohl |
description |
ABSTRACT Often astronomers of the Observatório Nacional are asked about how the shadow cast from a building or a tower to be built will impact crowded areas; in which way they would interfere with the wellfare by depriving population from sunlight. The same problem arises when agronomers plan areas for cultures when topographical accidents may cast shadows in a geographic region. My colleages usually answer these questions by delivering spherical trigonometry formulae and the sun equations of movement, and therefore they transfer the responsability of the conclusions back to the engineers and agronomers. What we didnt realize is the possible and even probable difficulties that these professionals could be facing, since fundamental astronomy and astronomical object positioning knowledge is needed to figure out how the sun moves in the celestial sphere. Shadow projection and its mapping on a ground plan also requires specific knowledge. This paper intends to introduce solutions that will offer professionals, teachers and students conditions of better understanding this problem and, possibly, at least in some cases, bypass the need for quering astronomers. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172003000100008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172003000100008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1806-11172003000100008 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Revista Brasileira de Ensino de Física v.25 n.1 2003 reponame:Revista Brasileira de Ensino de Física (Online) instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Revista Brasileira de Ensino de Física (Online) |
collection |
Revista Brasileira de Ensino de Física (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Ensino de Física (Online) - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
||marcio@sbfisica.org.br |
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