• user warning: Table 'bacc_bicinstitut.drp_webform_block' doesn't exist query: SELECT nid FROM drp_webform_block WHERE nid = 31 in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/webformblock/webformblock.module on line 42.
  • user warning: Table 'bacc_bicinstitut.drp_webform_block' doesn't exist query: SELECT nid FROM drp_webform_block WHERE nid = 31 in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/webformblock/webformblock.module on line 42.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 40.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 41.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 42.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 43.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 44.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 45.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 46.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 47.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 48.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 49.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 50.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 51.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 56.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 57.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 58.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 59.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 60.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 61.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 62.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 63.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 64.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 65.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 66.
  • warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /var/www/vhosts/bicinstitut.cat/httpdocs/sites/all/modules/token/token_node.inc on line 67.

U16 | Com ha evolucionat la bicicleta?

Els orígens de la bicicleta se situen a Europa a principi segle XIX. Un comte francès va tenir la idea de crear un artefacte mecànic en el qual va col•locar dues rodes una davant de l'altra i les va unir mitjançant una fusta, enlloc de fer-ho una al costat de l’altra com fins llavors. Aquest nou artefacte es va començar a conèixer amb el nom de c élérifère.
El c élérifère va ser millorat posteriorment per un noble alemany i va donar lloc a un artefacte més semblat a la bicicleta actual però sense pedals, la draisiana. L'impuls, per tant, es feia amb les cames sobre el terra, ja que els pedals no van aparèixer fins a l'any 1851, de la mà de Pierre Michaux i el seu fill Ernest. Així, fent unes 30 voltes de pedal per minut s’aconseguia una velocitat de 5 km/h, molt superior a la de la draisiana. Aquest vehicle es va batejar amb el nom de velocípede, un terme que es va modificar al Regne Unit pel de bicycle, i que els francesos van traduir per bicyclette.
De tota manera, el gran salt tecnològic de la bicicleta té lloc quan l'any 1880, el francès Guilmet i el britànic Lawson introdueixen la cadena, el plat i el pinyó. Abans d’iniciar-se el segle XX, ja s’havien creat tots els elements que configuren la bicicleta actual: els pneumàtics de goma, el tensor del canvi, la dinamo, etc. Els avanços posteriors es van limitar a l’evolució de la forma i els materials per a reduir el pes de la bicicleta i fer-la més lleugera.

Més informació: "La Bicicleta: una màquina perfecte" (2010) QUÈQUICOM":

http://blogs.tv3.cat/quequicom.php?itemid=29444

 

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