#accaddeoggi 27 marzo 1899: prima comunicazione telegrafica internazionale

Il mondo diventa più piccolo

Le nuove frontiere sulle onde elettromagnetiche spalancate dal fisico tedesco Heinrich Hertz avevano portato Guglielmo Marconi a compiere esperimenti sulla trasmissione telegrafica senza fili. Ottenne il brevetto della sua scoperta in Gran Bretagna, dal momento che il governo italiano dell’epoca non aveva mostrato interesse.

L'obiettivo ultimo del fisico italiano era dimostrare la possibilità di trasmettere a grandi distanze e trovati i fondi necessari, impiantò le prime stazioni sperimentali fisse.

Dopo lunghi studi tentò il collegamento radiotelegrafico attraverso il canale della Manica, su una distanza di oltre cinquanta chilometri. L'esperimento avvenne il 27 marzo del 1899, tra South Foreland e la stazione francese di Wimereux, presso Boulogne-sur-Mer, e viene ricordato come la prima comunicazione radiotelegrafica stabilita tra due diversi Stati.

Le radiocomunicazioni e la loro importanza nella civiltà moderna

redazione
parte di: Accadde oggi ...

27/03/2017

Powered by eZ Publish™ CMS Open Source Web Content Management. Copyright © 1999-2014 eZ Systems AS (except where otherwise noted). All rights reserved.

eZ debug

Clear cache:

Quick settings:

Timing: Dec 16 2025 13:50:54
Script start
Timing: Dec 16 2025 13:50:55
Module start 'layout'
Timing: Dec 16 2025 13:50:55
Module start 'content'
Timing: Dec 16 2025 13:50:56
Module end 'content'
Debug: ezpI18n::translateText Dec 16 2025 13:50:56
Missing translation for message in context: 'kernel/navigationpart' with comment: 'Navigation part'. The untranslated message is: 'contentclassmanager'
Debug: ezpI18n::translateText Dec 16 2025 13:50:56
Missing translation for message in context: 'kernel/navigationpart' with comment: 'Navigation part'. The untranslated message is: 'Apps'
Debug: ezpI18n::translateText Dec 16 2025 13:50:56
Missing translation for message in context: 'kernel/navigationpart' with comment: 'Navigation part'. The untranslated message is: 'Amministrazione Trasparente'
Debug: ezpI18n::translateText Dec 16 2025 13:50:56
Missing translation for message in context: 'kernel/navigationpart' with comment: 'Navigation part'. The untranslated message is: 'eZTags'
Error: eZTemplate @ extension/ocbootstrap/design/ocbootstrap/templates/canonical_link.tpl:1[0] Dec 16 2025 13:50:56
Unknown template variable 'pagedata' in namespace ''
Error: eZTemplate @ extension/ocbootstrap/design/ocbootstrap/templates/canonical_link.tpl:1[0] Dec 16 2025 13:50:56
Unknown template variable 'pagedata' in namespace ''
Timing: Dec 16 2025 13:50:56
Script end

Main resources:

Total runtime1.2253 sec
Peak memory usage27,904.0000 KB
Database Queries112

Timing points:

CheckpointStart (sec)Duration (sec)Memory at start (KB)Memory used (KB)
Script start 0.00000.1123 4,819.53131,695.9297
Module start 'layout' 0.11230.0793 6,515.4609677.6328
Module start 'content' 0.19160.9876 7,193.093817,599.2422
Module end 'content' 1.17920.0460 24,792.33591,422.3438
Script end 1.2252  26,214.6797 

Time accumulators:

 Accumulator Duration (sec) Duration (%) Count Average (sec)
Ini load
Load cache0.02882.3537350.0008
Check MTime0.00390.3185350.0001
PostgreSQL Cluster
DB queries0.08196.6802130.0063
Postgresql Total
Database connection0.00420.339710.0042
Postgresql queries0.418234.13091120.0037
Looping result0.00000.000000.0000
MySQL Cluster
DFS operations0.00030.028410.0003
TS translator
TS init0.00980.803270.0014
TS cache load0.00720.583870.0010
TS context load0.00550.445570.0008
Template Total0.855469.830.2851
Template load0.207916.966230.0693
String conversion in template resource0.00070.0549230.0000
Template parser: create text elements0.01771.4461230.0008
Template parser: remove whitespace0.00290.2403230.0001
Template parser: construct tree0.123410.0685230.0054
Template load and register function0.01381.1245100.0014
Template processing0.647452.838430.2158
states
state_id_array0.00270.218520.0013
state_identifier_array0.00360.297130.0012
Override
Cache load0.166813.6163290.0058
Sytem overhead
Fetch class attribute can translate value0.05614.580210.0561
Fetch class attribute name0.00450.367450.0009
XML
Image XML parsing0.00750.610910.0075
class_abstraction
Instantiating content class attribute0.00010.006250.0000
OCoembed
http://www.cbt.biblioteche.provincia.tn.it/oseegenius/resource?uri=3790055&v=l&dcnr=40.00020.016610.0002
General
String conversion0.00020.0170250.0000
Note: percentages do not add up to 100% because some accumulators overlap

CSS/JS files loaded with "ezjscPacker" during request:

CacheTypePacklevelSourceFiles
CSS0design/base/stylesheets/core.css
JS0extension/ocmaps/design/standard/javascript/leaflet.js
extension/ocbootstrap/design/ocbootstrap/javascript/insertmedia.js

Templates used to render the page:

UsageRequested templateTemplateTemplate loadedEditOverride
1node/view/full.tplfull/article.tplextension/oc_tcu/design/tcu/override/templates/full/article.tplEdit templateOverride template
1parts/opengraph_set_persistent.tpl<No override>extension/ngopengraph/design/standard/templates/parts/opengraph_set_persistent.tplEdit templateOverride template
2content/datatype/view/ezxmltext.tpl<No override>extension/ocembed/design/standard/templates/content/datatype/view/ezxmltext.tplEdit templateOverride template
4content/datatype/view/ezxmltags/paragraph.tpl<No override>extension/ocbootstrap/design/ocbootstrap/templates/content/datatype/view/ezxmltags/paragraph.tplEdit templateOverride template
1atoms/image.tpl<No override>extension/oc_tcu/design/tcu/templates/atoms/image.tplEdit templateOverride template
1content/datatype/view/ezimage.tpl<No override>extension/oc_tcu/design/tcu/templates/content/datatype/view/ezimage.tplEdit templateOverride template
1content/datatype/view/ezxmltags/link.tpl<No override>extension/ocbootstrap/design/ocbootstrap/templates/content/datatype/view/ezxmltags/link.tplEdit templateOverride template
1content/datatype/view/ezstring.tpl<No override>design/standard/templates/content/datatype/view/ezstring.tplEdit templateOverride template
1content/datatype/view/ezobjectrelationlist.tpl<No override>extension/oc_tcu/design/tcu/templates/content/datatype/view/ezobjectrelationlist.tplEdit templateOverride template
1content/view/embed.tpl<No override>extension/ocbootstrap/design/ocbootstrap/templates/content/view/embed.tplEdit templateOverride template
1parts/social_buttons.tpl<No override>extension/oc_tcu/design/tcu/templates/parts/social_buttons.tplEdit templateOverride template
1atoms/meta.tpl<No override>extension/oc_tcu/design/tcu/templates/atoms/meta.tplEdit templateOverride template
1print_pagelayout.tpl<No override>design/standard/templates/print_pagelayout.tplEdit templateOverride template
1page_head.tpl<No override>extension/oc_tcu/design/tcu/templates/page_head.tplEdit templateOverride template
1parts/opengraph_persistent.tpl<No override>extension/ngopengraph/design/standard/templates/parts/opengraph_persistent.tplEdit templateOverride template
1canonical_link.tpl<No override>extension/ocbootstrap/design/ocbootstrap/templates/canonical_link.tplEdit templateOverride template
1link.tpl<No override>extension/oc_tcu/design/tcu/templates/link.tplEdit templateOverride template
1page_mainarea.tpl<No override>design/standard/templates/page_mainarea.tplEdit templateOverride template
1page_warning.tpl<No override>design/standard/templates/page_warning.tplEdit templateOverride template
1page_copyright.tpl<No override>design/standard/templates/page_copyright.tplEdit templateOverride template
1setup/debug_toolbar.tpl<No override>design/standard/templates/setup/debug_toolbar.tplEdit templateOverride template
1setup/clear_cache.tpl<No override>design/standard/templates/setup/clear_cache.tplEdit templateOverride template
1setup/quick_settings.tpl<No override>design/standard/templates/setup/quick_settings.tplEdit templateOverride template
 Number of times templates used: 27
 Number of unique templates used: 23

Time used to render debug report: 0.0008 secs

DEV 192.168.105.41