102,384 research outputs found
ESONET LIDO Demonstration Mission: the East Sicily node.
No full textOff East Sicily (at 2100 m depth, 25 km off the harbour of Catania) a prototype of a cabled deep-sea observatory (NEMO-SN1) was set up and has been operational in real-time since 2005 (the cabled deep-sea multi-parameter station SN1, equipped with geophysical and environmental sensors and the cabled NEMO-OνDE, equipped with 4 broadband hydrophones). The Western Ionian Sea is one of the node sites for the upcoming European permanent underwater network (EMSO). Within the activities of the EC project ESONET-NoE some demonstration missions have been funded. The LIDO-DM (Listening to the Deep Ocean-Demonstration Mission) is one of these and is related to two sites, East Sicily and Iberian Margin (Gulf of Cadiz), the main aims being geo-hazards monitoring and warning (seismic, tsunami, and volcanic) and bio-acoustics. The LIDO-DM East Sicily installation represents a further major step within ESONET-NoE, resulting in a fully integrated system for multidisciplinary deep-sea science, capable to transmit and distribute data in real time to the scientific community and to the general public. LIDO-DM East Sicily hosts a large number of sensors aimed at monitoring and studying oceanographic and environmental parameters (by means of CTD, ADCP, 3-C single point current meter, turbidity meter), geophysical phenomena (low frequency hydrophones, accelerometer, gravity meter, vector and scalar magnetometers, seismometer, absolute and differential pressure gauges), ocean noise monitoring and identification and tracking of biological acoustic sources in deep sea
Modular curves with many points over finite fields
No full textWe describe an algorithm to compute the number of points over finite fields on a broad class of modular curves: we consider quotients XH /W for H a subgroup of GL2(Z/nZ) such that for each prime p dividing n, the subgroup H at p is either a Borel subgroup, a Cartan subgroup, or the normalizer of a Cartan subgroup of GL2(Z/peZ), and for W any subgroup of the Atkin-Lehner involutions of XH. We applied our algorithm to more than ten thousand curves of genus up to 50, finding more than one hundred record breaking curves, namely curves X/Fq with genus g that improve the previously known lower bound for the maximum number of points over Fq of a curve with genus g. As a key technical tool for our computations, we prove the generalization of Chen’s isogeny to all the Cartan modular curves of composite level
Geometric quadratic Chabauty
No full textSince Faltings proved Mordell's conjecture in [16] in 1983, we have known that the sets of rational points on curves of genus at least 2 are finite. Determining these sets in individual cases is still an unsolved problem. Chabauty's method (1941) [10] is to intersect, for a prime number p, in the p-adic Lie group of p-adic points of the Jacobian, the closure of the Mordell-Weil group with the p-adic points of the curve. Under the condition that the Mordell-Weil rank is less than the genus, Chabauty's method, in combination with other methods such as the Mordell-Weil sieve, has been applied successfully to determine all rational points in many cases.Minhyong Kim's nonabelian Chabauty programme aims to remove the condition on the rank. The simplest case, called quadratic Chabauty, was developed by Balakrishnan, Besser, Dogra, Muller, Tuitman and Vonk, and applied in a tour de force to the so-called cursed curve (rank and genus both 3).This article aims to make the quadratic Chabauty method small and geometric again, by describing it in terms of only 'simple algebraic geometry' (line bundles over the Jacobian and models over the integers)
The reaction of allene with dicarbonylchlororodium: formation of a new -allylic complexes of rhodium(III)
No full textESONET LIDO Demonstration Mission: the Iberian Margin node.
No full textThe Gulf of Cadiz is one of two the test sites chosen for the demonstration of the ESONET - LIDO Demonstration Mission (DM) [1], which will establish a first nucleus of regional network of multidisciplinary sea floor observatories. The Gulf of Cadiz is a highly populated area, characterized by tsunamigenic sources, which caused the devastating earthquake and tsunamis that struck Lisbon in 1755. The seismic activity is concentrated along a belt going from this region to the Azores and the main tsunamigenic tectonic sources are located near the coastline. In the framework of the EU - NEAREST project [2] the GEOSTAR deep ocean bottom multi-parametric observatory was deployed for a one year mission off cape Saint Vincent at about 3200 m depth. GEOSTAR was equipped with a set of oceanographic, seismic and geophysical sensors and with a new tsunami detector prototype. In November 2009 the GEOSTAR abyssal station equipped with the tsunami prototype was redeployed at the same site on behalf of NEAREST and ESONET - LIDO DM. The system is able to communicate from the ocean bottom to the land station via an acoustic and satellite link. The abyssal station is designed both for long term geophysical and oceanographic observation and for tsunami early warning purpose. The tsunami detection is performed by two different algorithms: a new real time dedicated tsunami detection algorithm which analyses the water pressure data, and a seismic algorithm which triggers on strong events. Examples of geophysical and oceanographic data acquired by the abyssal station during the one year mission will be shown. The development of a new acoustic antenna equipped with a stand alone and autonomous acquisition system will allow the recording of marine mammals and the evaluation of environmental noise. ReferencesEGUPublishedVienna1.8. Osservazioni di geofisica ambientaleope
ESONET LIDO Demonstration Mission: the Iberian Margin node.
No full textThe Gulf of Cadiz is one of two the test sites chosen for the demonstration of the ESONET - LIDO Demonstration Mission (DM) [1], which will establish a first nucleus of regional network of multidisciplinary sea floor observatories. The Gulf of Cadiz is a highly populated area, characterized by tsunamigenic sources, which caused the devastating earthquake and tsunamis that struck Lisbon in 1755. The seismic activity is concentrated along a belt going from this region to the Azores and the main tsunamigenic tectonic sources are located near the coastline. In the framework of the EU - NEAREST project [2] the GEOSTAR deep ocean bottom multi-parametric observatory was deployed for a one year mission off cape Saint Vincent at about 3200 m depth. GEOSTAR was equipped with a set of oceanographic, seismic and geophysical sensors and with a new tsunami detector prototype. In November 2009 the GEOSTAR abyssal station equipped with the tsunami prototype was redeployed at the same site on behalf of NEAREST and ESONET - LIDO DM. The system is able to communicate from the ocean bottom to the land station via an acoustic and satellite link. The abyssal station is designed both for long term geophysical and oceanographic observation and for tsunami early warning purpose. The tsunami detection is performed by two different algorithms: a new real time dedicated tsunami detection algorithm which analyses the water pressure data, and a seismic algorithm which triggers on strong events. Examples of geophysical and oceanographic data acquired by the abyssal station during the one year mission will be shown. The development of a new acoustic antenna equipped with a stand alone and autonomous acquisition system will allow the recording of marine mammals and the evaluation of environmental noise. ReferencesEGUPublishedVienna1.8. Osservazioni di geofisica ambientaleope
Automorphisms of Cartan modular curves of prime and composite level
No full textWe study the automorphisms of modular curves associated to Cartan subgroups
of and certain subgroups of their
normalizers. We prove that if is large enough, all the automorphisms are
induced by the ramified covering of the complex upper half-plane. We get new
results for non-split curves of prime level : the curve
has no non-trivial automorphisms, whereas the curve
has exactly one non-trivial automorphism. Moreover, as an
immediate consequence of our results we compute the automorphism group of
, where is the group generated by the Atkin-Lehner
involutions of and is a large enough square.Comment: 36 pages, 4 tables. Some proofs rely on MAGMA scripts available at
https://github.com/guidoshore/automorphisms_of_Cartan_modular_curve
Undifferentiated metastatic renal cell carcinoma presenting as a cutaneous nodular lesion|Bir kütanöz nodüler lezyon olarak ortaya çıkan farklılaşmamış metastatik renal hücreli karsinom
No full textCutaneous metastases may be the first sign of clinically silent visceral cancer. Approximately 30% of patients with primary renal cell carcinoma present with metastatic disease, and only 8% of them have skin metastases. We present the case of a 59-year-old male patient with a subcutaneous nodular on the upper chest extending to the jugular region. The lesion appeared skin colored and was not painful and 5 cm × 3.5 cm in diameter. The histological examination of the cutaneous biopsy showed an infiltration of undifferentiated epithelial cells positive to cytokeratins AE1/AE3, whereas they were negative to CK-20, CK5/6, cluster of differentiation 10, vimentin, thyroid transcription factor-1, S-100, human melanoma black-45, hepatocyte-specific antigen, carcinoembryonic antigen, and chromogranin A. A total-body computed tomography (CT) showed the presence of a tumoral lesion in the left kidney with multiple metastases in the lung, brain, and bones. According to the cutaneous biopsy and total-body CT, a final diagnosis of an undifferentiated renal carcinoma presenting as a subcutaneous metastasis was made. A chemotherapeutic treatment with gemcitabine and cisplatin resulted in the stabilization of the renal and metastatic lesions with an improvement in the quality of life of the patient. Considering that the prognosis of patients with cutaneous metastases is very poor, it is necessary to obtain an appropriate diagnosis in order to identify patients with treatable disease with the purpose of starting a therapeutic protocol
ESONET LIDO Demonstration Mission: the East Sicily node
No full textOff East Sicily (at 2100 m depth, 25 km off the harbour of Catania) a prototype of a cabled deep-sea observatory
(NEMO-SN1) was set up and has been operational in real-time since 2005 (the cabled deep-sea multi-parameter
station SN1, equipped with geophysical and environmental sensors and the cabled NEMO-OνDE, equipped with
4 broadband hydrophones). The Western Ionian Sea is one of the node sites for the upcoming European permanent
underwater network (EMSO). Within the activities of the EC project ESONET-NoE some demonstration missions
have been funded. The LIDO-DM (Listening to the Deep Ocean-Demonstration Mission) is one of these and is re-
lated to two sites, East Sicily and Iberian Margin (Gulf of Cadiz), the main aims being geo-hazards monitoring and
warning (seismic, tsunami, and volcanic) and bio-acoustics. The LIDO-DM East Sicily installation represents a fur-
ther major step within ESONET-NoE, resulting in a fully integrated system for multidisciplinary deep-sea science,
capable to transmit and distribute data in real time to the scientific community and to the general public. LIDO-DM
East Sicily hosts a large number of sensors aimed at monitoring and studying oceanographic and environmental
parameters (by means of CTD, ADCP, 3-C single point current meter, turbidity meter), geophysical phenomena
(low frequency hydrophones, accelerometer, gravity meter, vector and scalar magnetometers, seismometer, abso-
lute and differential pressure gauges), ocean noise monitoring and identification and tracking of biological acoustic
sources in deep sea. The latter will be performed using two tetrahedral arrays of 4 hydrophones, located at a relative
distance of about 5 km, and at about 25 km from the shore. The whole system will be connected and powered from
shore, by means of the electro-optical cable net installed at the East Sicily Site Infrastructure, and synchronised
with GPS. Sensors data sampling is performed underwater and transmitted via optical fibre link, with optimal S/N
ratio for all signals. This will also permit real-time data acquisition, analysis and distribution on-shore. Innova-
tive electronics for the off-shore data acquisition and transmission systems has been designed, built and tested.
A dedicated computing and networking infrastructure for data acquisition, storage and distribution through the
internet has been also created. The deployment and connection of the deep sea structures will be performed using
the dedicated ROV and Deep Sea Shuttle handling facilities (PEGASO, owned by INGV and INFN). LIDO-DM
constitutes the enhancement of the Western Ionian site in view of the EMSO Research Infrastructure.PublishedVienna1.8. Osservazioni di geofisica ambientaleope
ESONET LIDO Demonstration Mission: the East Sicily node
No full textOff East Sicily (at 2100 m depth, 25 km off the harbour of Catania) a prototype of a cabled deep-sea observatory
(NEMO-SN1) was set up and has been operational in real-time since 2005 (the cabled deep-sea multi-parameter
station SN1, equipped with geophysical and environmental sensors and the cabled NEMO-OνDE, equipped with
4 broadband hydrophones). The Western Ionian Sea is one of the node sites for the upcoming European permanent
underwater network (EMSO). Within the activities of the EC project ESONET-NoE some demonstration missions
have been funded. The LIDO-DM (Listening to the Deep Ocean-Demonstration Mission) is one of these and is re-
lated to two sites, East Sicily and Iberian Margin (Gulf of Cadiz), the main aims being geo-hazards monitoring and
warning (seismic, tsunami, and volcanic) and bio-acoustics. The LIDO-DM East Sicily installation represents a fur-
ther major step within ESONET-NoE, resulting in a fully integrated system for multidisciplinary deep-sea science,
capable to transmit and distribute data in real time to the scientific community and to the general public. LIDO-DM
East Sicily hosts a large number of sensors aimed at monitoring and studying oceanographic and environmental
parameters (by means of CTD, ADCP, 3-C single point current meter, turbidity meter), geophysical phenomena
(low frequency hydrophones, accelerometer, gravity meter, vector and scalar magnetometers, seismometer, abso-
lute and differential pressure gauges), ocean noise monitoring and identification and tracking of biological acoustic
sources in deep sea. The latter will be performed using two tetrahedral arrays of 4 hydrophones, located at a relative
distance of about 5 km, and at about 25 km from the shore. The whole system will be connected and powered from
shore, by means of the electro-optical cable net installed at the East Sicily Site Infrastructure, and synchronised
with GPS. Sensors data sampling is performed underwater and transmitted via optical fibre link, with optimal S/N
ratio for all signals. This will also permit real-time data acquisition, analysis and distribution on-shore. Innova-
tive electronics for the off-shore data acquisition and transmission systems has been designed, built and tested.
A dedicated computing and networking infrastructure for data acquisition, storage and distribution through the
internet has been also created. The deployment and connection of the deep sea structures will be performed using
the dedicated ROV and Deep Sea Shuttle handling facilities (PEGASO, owned by INGV and INFN). LIDO-DM
constitutes the enhancement of the Western Ionian site in view of the EMSO Research Infrastructure.PublishedVienna1.8. Osservazioni di geofisica ambientaleope
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