Tato kes ma napomoci tomu, abychom uz znovu nebyli prekvapeni
prichodem nebo odchodem letniho casu. Na uvodnich
souradnicich kes nehledejte (nebo ano, chcete-li, ale neni
tam). Pro nalezeni souradnic umisteni budete potrebovat zjistit par
informaci z historie letniho casu a predevsim udelat si jasno, kdy
ze se tento hlasi.
Prvni dokumentovana myslenka letniho casu (nebo cehosi
podobneho) pochazela od Benjamina Franklina (tiskar, nakladatel,
valecnik, statnik, diplomat, vynalezce hromosvodu, ...) a byla
vyslovena v dopise nakladatelum Journal of Paris. Rok napsani
dopisu oznacte A.
K prvnimu zavedeni letniho casu v praxi doslo v Evrope v roce,
ktery oznacte B.
Nasledujici magická numera zakodujte vzdy z data, kdy
se uskutecnuje prechod tak, ze mesic a den zapisete za sebe ve
tvaru MMDD a vznikne tak ctyrciferne (pro mesice leden-zari vlastne
trojciferne) cislo.
Zacatek a konec letniho casu v roce 2007 v Brne oznacte
C a D.
V jedne casti Gronska se v terminovani letniho casu vyskytuje
jista singularita - prechod je v sobotu. Prechody v roce 2007 v
Nuuk (hlavni mesto Gronska) oznacte E a F.
Na jizni polokouli se veci maji trosicku jinak. Zjistete zacatek
a konec letniho casu na vetsine uzemi Brazilie v roce 2007 -
oznacte G a H. Tato dvojice pusobi nekterym
hledacum problemy, proto na ni upozornuji. Na nejmenovanem
specializovanem webovem serveru, ze ktereho nejspis budete cerpat,
bo vas tam strycek Google dovede, maji pro tahle pismenka dva ruzne
udaje - jeden dobre, druhy blbe. Potvory. Totiz konec DST je i v
Brazilii v nedeli, nikoli v sobotu - pokud tedy jsem spravne
zpraven.
A podivejme se take do budoucnosti: zacatek a konec letniho casu
v roce 2008 v Brne oznacte I a J.
Celou tuhle taskarici s posouvanim hodinek by se samozrejme
nesluselo podstupovat, pokud by neznamenala setsakra exaktne
prokazatelnou usporu energie. Zjistete procento uspor energie diky
letnimu casu v CR zaokrouhlene na dve desetinna mista, vynasobte
100, oznacte K.
Finalku hledejte na souradnicich
N 49° n/1000
E 16° e/1000
kde
n=2*(I-E)*F+(C-H)/(I-C)+K*(F+E-J-C)-B+A
e=H*I/(D-J)+(I-C)*(C-I)-D-B
Pri zapisu do elektronickeho logu prosim charakterizujte
svuj vztah k letnimu casu.
[EN] To find this cache you will have to
gather a few information from the history of DST and some beginning
and ending dates.
The first documented thought of daylight
saving time (or something of that sort) came from Benjamin Franklin
and was expressed in a letter to the publisher of the Journal of
Paris. Find out the year of this event, call it
A.
The first practical application of the
daylight saving time by several Europian governments happend in a
year which should be called B.
The following magic
numbers are encoded from dates of transition to or from the DST, by
concatenating the month and day numbers as MMDD. That yields a
four-digit (or three digit for January to September)
number.
The DST start and end dates in 2007 in Brno
call C and D.
In one part of the Greenland there is a
singularity in the DST start and end dates - the transition is on
Saturday. The DST start and end in 2007 in Nuuk (the capital of
Greenland) be called E and F
In the southern hemisphere the situation is a
bit different. Find out the DST start and end in Brazil (most
locations) in 2007, call them G and H. This
couple causes trouble to some cachers. An unnamed specialized
server which you will probably be using, as uncle Google will bring
you there, has two different values - one right, one wrong.
Loosers.
And let us also look into the future: the
start and end of the DST in 2008 in Brno be called I and
J.
This whole practical joke with time shifting
would not be undertaken if it did not mean damned exactly proven
energy savings. Find out the percentage of energy saved thanks to
the DST in Czechia, rounded to hundredths, multiply by 100,
call it K.
The final stage should be looked for at
N 49° n/1000
E 16° e/1000
where
n=2*(I-E)*F+(C-H)/(I-C)+K*(F+E-J-C)-B+A
e=H*I/(D-J)+(I-C)*(C-I)-D-B
When logging to the electronic log,
please express your opinion on the DST.
Az spoctete souradnice finalky, dobre si promyslete, odkud k ni
pujdete. Jsou cesty horsi a cesty lepsi (jak o tom svedci i logy).
Nejlepsi je cesta od Wilsonova jezera:
Kazdopadne neni potreba vydavat se do mist s terenem 4* a 5* a
muze to byt nebezpecne, tak nic takoveho nepodstupujte - OPRAVDU TO
NENI POTREBA. Za deste vznika na cesticce blato a podle podrazek a
sikovnosti pak terenni hodnoceni kolisa - jestli muzete, volte
navstevu za sucha.