osveˇtlova´nı´ architektonicky´ch dominant v...
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Osvetlovanı architektonickych dominant v krajine
Jenık Hollan, Hvezdarna a planetarium M. Kopernıka v Brne
2004
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Osvetlenı soliternı budovy
– velka zmena prırodnıho nocnıho prostredı
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Tma: zakladnı atribut noci
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Cast prvnı: prehled jejıho znecist’ovanı a ochrany
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Znecistenı nocnıho prostredı
umele pridanym svetlem:
jedine znecistenı, ktere dosud rychle roste.
Rust by mel byt zastaven a obracen v pokles, abychom se dostali naudrzitelnou cestu.
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Podobnosti s emisemi fosilnıho uhlıku.
Oba polutanty byly povazovany pred 30 lety za neskodne, oba jsouvelmi nebezpecne.
Resenı: prestat plytvat, zacıt se chovat odpovedne
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Zakladnı pravidla pro budoucnost by mela byt v zakone:
• Nesvıtit vodorovne a nahoru
• Pouzıvat jen tolik svetla, kolik vyzadujı bezpecnostnı normy, a ne vıcenez 1 nit nebo 10 luxu v ostatnıch prıpadech
• Zajistit, ze se mnozstvı svetla da behem noci podstatne snızit
• Stanovit limit pro jas reklam
• Zvlaste zranitelne lokality chranit provizornımi opatrenımi ihned
• Umoznit obcım, aby mohly napravit i dnesnı stav
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Vyjimky:
dopravnı signaly,
kratkodobe svıcenı,
slabe zdroje (nanejvys zarivky do 23 W, zarovky do 100 W)
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Dobra zkusenost z Lombardie od roku 2000
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Tlumenı svetelnych zdroju
(dobry prıklad z Brna)
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Kdo ma namitky?
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Nemoci (rakoviny, obezita), tma a spanek
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Prıroda, oslnenı, svıcenı na cizı pozemky
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Dopady nedbaleho svıcenı (2003, tisıc osob z cele CR)
• decimovane pocty hmyzu aktivnıho v noci (s dopady na cele ekosys-temy),
• poruchy spanku u pul milionu osob, pusobene venkovnım osvetlenımjako jednou ze dvou hlavnıch subjektivne udavanych prıcin,
• nezadoucı, nedostatecne potlacene svetlo do loznic, postihujıcı dal-sıho trictvrte milionu lidı,
• potrebu nocnıho zatemnovanı loznic, ktere jako dostatecne ucinnepouzıvajı dalsı dva miliony osob,
• bezne oslnovanı stalym osvetlenım, ktere ve venkovnım prostredı za-zıva nekolik milionu osob,
• vizualnı nahrada skutecne nocnı krajiny spoustou lamp, kterou jakonezadoucı pocit’ujı ctyri miliony lidı,
• silne snızena viditelnost hvezd vinou oslnenı, ktera vadı rovnez ctyremmilionum obyvatel,
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• svetle nocnı nebe i v mıstech, kde nic neoslnuje, coz vadı dvema a pulmilionu Cechu.
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Cast druha: osvetlovanı pro ozdobu
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Svetylka pro radost
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Svetlo jako scenicky prostredek
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Slova v tichu, dobry a spatny ucitel.
Obdobne svetlo v seru.
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Prvnı krok: odstranit rusive svetlo
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Kolik svetla noveho, kam, kdy a proc vubec. Kdy je tma lepsı.
Vecery vsednı a slavnostnı. Ohnostroje a vanocnı stromek.
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Prıklady z Londyna
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z Telce
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z Olomouce
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z Brna
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Co dokaze technika a co vlastne chtıt
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Noc je dobra a pekna vec.
Tu a tam ji lze obcas zkraslit,
pokud ji tım ale mnohem vıc nepokazıme.
http://svetlo.astro.cz
http://www.veronica.cz/noc