40 research outputs found
Two-way sequential time synchronization: Preliminary results from the SIRIO-1 experiment
A two-way time synchronization experiment performed in the spring of 1979 and 1980 via the Italian SIRIO-1 experimental telecommunications satellite is described. The experiment was designed and implemented to precisely monitor the satellite motion and to evaluate the possibility of performing a high precision, two-way time synchronization using a single communication channel, time-shared between the participating sites. Results show that the precision of the time synchronization is between 1 and 5 ns, while the evaluation and correction of the satellite motion effect was performed with an accuracy of a few nanoseconds or better over a time interval from 1 up to 20 seconds
An application of EMS98 in a medium-sized city: The case of L’Aquila (Central Italy) after the April 6, 2009 Mw 6.3 earthquake
This paper describes the damage survey in the city of L’Aquila after the 6 April
2009 earthquake. The earthquake, whose magnitude and intensity reached Mw=6.3 and
Imax=9–10 MCS, struck the Abruzzi region of Central Italy producing severe damage in
L’Aquila and in many villages along theMiddle Aterno River valley. After the event, a building-
to-building survey was performed in L’Aquila downtown aiming to collect data in order
to perform a strict evaluation of the damage. The survey was carried out under the European
Macroseismic Scale (EMS98) to evaluate the local macroseismic intensity. This damage survey
represents the most complex application of the EMS98 in Italy since it became effective.
More than 1,700 buildings (99% of the building stock) were taken into account during the
survey at L’Aquila downtown, highlighting the difficult application of the macroseismic scale
in a large urban context. The EMS98 revealed itself to be the best tool to perform such kind
of analysis in urban settings. The complete survey displayed evidence of peculiar features in
the damage distribution. Results revealed that the highest rate of collapses occurred within
a delimited area of the historical centre and along the SW border of the fluvial terrace on
which the city is settled. Intensity assessed for L’Aquila downtown was 8–9 EMS.Published67-801.11. TTC - Osservazioni e monitoraggio macrosismico del territorio nazionaleJCR Journalrestricte
The Architectural Design Rules of Solar Systems based on the New Perspective
On the basis of the Lunar Laser Ranging Data released by NASA on the Silver
Jubilee Celebration of Man Landing on Moon on 21st July 1969-1994, theoretical
formulation of Earth-Moon tidal interaction was carried out and Planetary
Satellite Dynamics was established. It was found that this mathematical
analysis could as well be applied to Star and Planets system and since every
star could potentially contain an extra-solar system, hence we have a large
ensemble of exoplanets to test our new perspective on the birth and evolution
of solar systems. Till date 403 exoplanets have been discovered in 390
extra-solar systems. I have taken 12 single planet systems, 4 Brown Dwarf -
Star systems and 2 Brown Dwarf pairs. Following architectural design rules are
corroborated through this study of exoplanets. All planets are born at inner
Clarke Orbit what we refer to as inner geo-synchronous orbit in case of
Earth-Moon System. By any perturbative force such as cosmic particles or
radiation pressure, the planet gets tipped long of aG1 or short of aG1. Here
aG1 is inner Clarke Orbit. The exoplanet can either be launched on death spiral
as CLOSE HOT JUPITERS or can be launched on an expanding spiral path as the
planets in our Solar System are. It was also found that if the exo-planet are
significant fraction of the host star then those exo-planets rapidly migrate
from aG1 to aG2 and have very short Time Constant of Evolution as Brown Dwarfs
have. This vindicates our basic premise that planets are always born at inner
Clarke Orbit. This study vindicates the design rules which had been postulated
at 35th COSPAR Scientific Assembly in 2004 at Paris, France, under the title
,New Perspective on the Birth & Evolution of Solar Systems.Comment: This paper has been reported to Earth,Moon and Planets Journal as
MOON-S-09-0007
Rilievo macrosismico del terremoto emiliano del 23 dicembre 2008
Questa nota presenta una sintesi delle attività svolte durante il rilievomacrosismico del terremoto avvenuto
tra le province di Parma e Reggio Emilia il 23 dicembre 2008. La scossa di Ml 5.2 è stata localizzata a sud
di Parma ed è stata avvertita in tutta l’Italia settentrionale e in gran parte della Liguria e della Toscana. Il
presente rapporto illustra lemodalità di intervento del teamQUEST, relative al rilievo degli effetti e alla valutazione
in intensità MCS in particolare per le località della zona epicentrale. L’ampia documentazione fotografica illustra
alcuni dettagli delle tipologie di danneggiamento rilevate e consente di comprendere meglio le valutazioni
dell’intensità macrosismica.
This paper presents an overview of the activities performed during the macroseismic field survey of the earthquake
that occurred in the Parma and Reggio Emilia region on December 23, 2008. The mainshock (Ml=5.2), was
located south of the city of Parma and was resolutely felt through Northern Italy. The report here presented shows
the procedures carried out by QUEST (Quick Earthquake Survey Team), concerning the survey. QUEST has been engaged
in gathering the damage information and in assessing the macroseismic intensity, in particular about the epicentral area.
A copious photo collection shows details of the observed damage nature and allows to better illustrate the intensit
An application of EMS98 in a medium-sized city: the case of l’Aquila (Central Italy) after the april 6, 2009 mw 6.3 earthquake
This paper describes the damage survey in the city of L’Aquila after the 6 April 2009
earthquake. The earthquake, whose magnitude and intensity reached Mw=6.3 and Imax=10 MCS,
struck the Abruzzi region of Central Italy producing severe damage in L’Aquila and in many
villages along the Middle Aterno River valley. After the event, a building-to-building survey was
performed in L’Aquila downtown aiming to collect data in order to perform a strict evaluation of
the damage. The survey was carried out under the European Macroseismic Scale (EMS98) to
evaluate the local macroseismic intensity. This damage survey represents the most complex
application of the EMS98 in Italy since it became effective. More than 1700 buildings (99% of the
building stock) were taken into account during the survey at L’Aquila downtown, highlighting the
difficult application of the macroseismic scale in a large urban context. The EMS98 revealed itself
to be the best tool to perform such kind of analysis in urban settings. The complete survey displayed
evidence of peculiar features in the damage distribution. Results revealed that the highest rate of
collapses occurred within a delimited area of the historical centre and along the SW border of the
fluvial terrace on which the city is settled. Intensity assessed for L’Aquila downtown was 8-9 EMS
An application of EMS98 in a medium-sized city: The case of L’Aquila (Central Italy) after the April 6, 2009 Mw 6.3 earthquake
This paper describes the damage survey in the city of L’Aquila after the 6 April
2009 earthquake. The earthquake, whose magnitude and intensity reached Mw=6.3 and
Imax=9–10 MCS, struck the Abruzzi region of Central Italy producing severe damage in
L’Aquila and in many villages along theMiddle Aterno River valley. After the event, a building-
to-building survey was performed in L’Aquila downtown aiming to collect data in order
to perform a strict evaluation of the damage. The survey was carried out under the European
Macroseismic Scale (EMS98) to evaluate the local macroseismic intensity. This damage survey
represents the most complex application of the EMS98 in Italy since it became effective.
More than 1,700 buildings (99% of the building stock) were taken into account during the
survey at L’Aquila downtown, highlighting the difficult application of the macroseismic scale
in a large urban context. The EMS98 revealed itself to be the best tool to perform such kind
of analysis in urban settings. The complete survey displayed evidence of peculiar features in
the damage distribution. Results revealed that the highest rate of collapses occurred within
a delimited area of the historical centre and along the SW border of the fluvial terrace on
which the city is settled. Intensity assessed for L’Aquila downtown was 8–9 EMS
L’indagine macrosismica: metodologia, parametri del terremoto, questioni aperte
Subito dopo l’evento del 6 aprile 2009, come di consueto è stata realizzata una lunga e complessa indagine macrosismica, promossa dal gruppo operativo QUEST, che ha avuto inizialmente l’obiettivo di delimitare l’area di danneggiamento, a supporto delle attività di pronto intervento della Protezione Civile, e successivamente quello di classificare nel modo più accurato e capillare possibile, gli effetti prodotti dall’evento, particolarmente nelle aree danneggiate.
A questo scopo è stata prodotta una stima utilizzando la scala MCS (Sieberg, 1930); in un secondo momento è stata rifinita l’indagine per una cinquantina di località dell’area maggiormente danneggiata (Is MCS>VII), raccogliendo ed elaborando i dati in termini di scala macrosismica EMS98 (Grünthal, 1998).
Per la complessità e la dimensione dei problemi affrontati, questo terremoto ha costituito un banco di prova di grande importanza per la macrosismologia italiana.
In questo testo viene descritto il lavoro realizzato, discutendo in particolare alcuni aspetti che hanno messo alla prova le metodologie di indagine tradizionali (sistematiche irregolarità degli insediamenti monitorati, forti divergenze degli scenari di danno rispetto a quelli previsti dalle scale, difficile comparabilità con scenari storici, ecc.) e presentandone i risultati, in relazione ai parametri epicentrali che ne risultano e il loro contributo più diretto alla comprensione complessiva della sismicità dell’area
L’indagine macrosismica: metodologia, parametri del terremoto, questioni aperte
Subito dopo l’evento del 6 aprile 2009, come di consueto è stata realizzata una lunga e complessa indagine macrosismica, promossa dal gruppo operativo QUEST, che ha avuto inizialmente l’obiettivo di delimitare l’area di danneggiamento, a supporto delle attività di pronto intervento della Protezione Civile, e successivamente quello di classificare nel modo più accurato e capillare possibile, gli effetti prodotti dall’evento, particolarmente nelle aree danneggiate.
A questo scopo è stata prodotta una stima utilizzando la scala MCS (Sieberg, 1930); in un secondo momento è stata rifinita l’indagine per una cinquantina di località dell’area maggiormente danneggiata (Is MCS>VII), raccogliendo ed elaborando i dati in termini di scala macrosismica EMS98 (Grünthal, 1998).
Per la complessità e la dimensione dei problemi affrontati, questo terremoto ha costituito un banco di prova di grande importanza per la macrosismologia italiana.
In questo testo viene descritto il lavoro realizzato, discutendo in particolare alcuni aspetti che hanno messo alla prova le metodologie di indagine tradizionali (sistematiche irregolarità degli insediamenti monitorati, forti divergenze degli scenari di danno rispetto a quelli previsti dalle scale, difficile comparabilità con scenari storici, ecc.) e presentandone i risultati, in relazione ai parametri epicentrali che ne risultano e il loro contributo più diretto alla comprensione complessiva della sismicità dell’area.Published49-551.11. TTC - Osservazioni e monitoraggio macrosismico del territorio nazionaleN/A or not JCRope