Cruise Summary Report POS480, 05th Feb. – 12th Feb., 2015, Las Palmas – Las Palmas (Spain)

The ongoing unrest of el Hierro Islands started in 2011 with a submarine volcanic eruption 2 km South of El Hierro and poses a significant hazard potential for the island and its inhabitants. The spatial distribution of seismicity is highly variable and a significant part of is occurs outside the network or offshore. In order to better characterize the seismicity the seismological network was densied with 8 ocean bottom seismometers (OBS) during Poseidon cruise POS480. The permanent network of IGN was densified with 9 onshore stations in March 2015. Beside a better depth estimate of the seismicity OBS data will allow a better characterization of the seismic signals due to an improved spatial coverage of the Island and its surrounding. The offshore supplement of the network will enable a much more improved hypocentral estimate, which in turn will allow to resolve the structures involved in the current seismic unrest as well as its spatial temporal characterization. OBS stations will be deinstalled early 2016. Swath bathymetry mapping of the 2011 eruption site was planned to reveal bathymetriy changes related to the growth of the new volcanic cone offshore the southern tip of ElHierro's coast. Additionally, we planned to use the multibeam system to monitor for upwelling gas flares in the water column. During the cruise 8 OBS stations were installed. The stations are equipped with lithium batteries which allow to register local seismicity for a period of 12 months. The deinstallation of the OBS is planned for log1 of Poseidon cruise POS 494 (04 February 2016 until 08 February 2016). Following the diplomatic clearance no multibeam data was measured

INTERDISCIPLINARIDADE NAS INSTITUIÇÕES DE ENSINO SUPERIOR - IES

O objetivo deste artigo é apresentar os conceitos sobre a interdisciplinaridade bem como a importância de um novo olhar sobre a reorganização curricular nas IES. Esse novo olhar deve estar voltado para uma visão sistêmica, centralizado nas disciplinas com a participação dos docentes e estudantes, sendo um grande estímulo ao enriquecimento do conhecimento científico, ensino e aprendizagem no exercício da cidadania no que tange a vida pessoal e profissional. Os procedimentos metodológicos que nortearam a pesquisa foram o método de raciocínio dedutivo com abordagem qualitativa, delineamento descritivo, pesquisa bibliográfica e documental, utilizando como coleta de dados, fontes primárias e secundárias por meio da revisão de literatura. Pretende-se também, mostrar a importância da interdisciplinaridade para os Programas de Pós-graduação da UFSC, utilizando para tanto, a descrição dos currículos e dos cursos que já optaram pela interdisciplinaridade

The South Chilean subduction zone between 41° and 43.5°S : seismicity, structure and state of stress

While the northern and central part of the South American subduction zone has been intensively studied, the southern part has attracted less attention, whichmay be due to its difficult accessibility and lower seismic activity. However, the southern part exhibits strong seismic and tsunamogenic potential with the prominent example of the Mw=9.5 May 22, 1960 Valdivia earthquake. In this study data from an amphibious seismic array (Project TIPTEQ) is presented. The network reached from the trench to the active magmatic arc incorporating the Island of Chiloé and the north-south trending Liquiñe-Ofqui fault zone (LOFZ). 364 local events were observed in an 11-month period from November 2004 until October 2005. The observed seismicity allows to constrain for the first time the current state of stress of the subducting plate and magmatic arc, as well as the local seismic velocity structure. The downgoing Benioff zone is readily identifiable as an eastward dipping plane with an inclination of ∼30◦. Main seismic activity occurred predominantly in a belt parallel to the coast of Chiloé Island in a depth range of 12–30 km, which is presumably related to the plate interface. The down-dip termination of abundant intermediate depth seismicity at approximately 70 km depth seems to be related to the young age (and high temperature) of the oceanic plate. A high-quality subset of events was inverted for a 2-D velocity model. The vp model resolves the sedimentary basins and the downgoing slab. Increased velocities below the longitudinal valley and the eastern part of Chiloé Island suggest the existence of a mantle bulge. Apart from the events in the Benioff Zone, shallow crustal events were observed mainly in different clusters along the magmatic arc. These crustal clusters of seismicity are related to the LOFZ, as well as to the volcanoes Chaitén, Michinmahuida and Corcovado. Seismic activity up to a magnitude of 3.8 Mw reveals the recent activity of the fault zone. Focal mechanisms for the events along the LOFZ were calculated using a moment tensor inversion of amplitude spectra for body waves which mostly yield strike-slip mechanisms indicating a SW-NE striking of σ1 for the LOFZ. Focal mechanism stress inversion indicates a strike-slip regime along the arc and a thrust regime in the Benioff zone. The observed deformation – which is also revealed by teleseismic observations – suggests a confirmation for the proposed northwardmovement of a forearc sliver acting as a detached continental micro-plate

RV Poseidon Cruise Report POS497: Seafloor acoustic ranging across the North Anatolian Fault offshore Istanbul, Çanakkale – Izmir, (12.4 – 15.4.2016)

The area around the Marmara Sea, one of the most densely populated parts of Europe, is subject to a high level of seismic hazard. The MARsite project proposes to identify the Marmara region as a ‘Supersite’ within European initiatives to aggregate on-shore, off-shore and space-based observations, comprehensive geophysical monitoring, improved hazard and risk assessments encompassed in an integrated set of activities to respond to all priorities identified in the ENV.2012.6.4-2 call. The overall project objectives of MARsite are to: - Achieve long-term hazard monitoring and evaluation - Improve existing earthquake early-warning and rapid-response systems - Improve ground shaking and displacement modelling - Pursue scientific and technical innovation - Interact with end user

Feature-Dependent Confusion Matrices for Low-Resource NER Labeling with Noisy Labels

In low-resource settings, the performance of supervised labeling models can be improved with automatically annotated or distantly supervised data, which is cheap to create but often noisy. Previous works have shown that significant improvements can be reached by injecting information about the confusion between clean and noisy labels in this additional training data into the classifier training. However, for noise estimation, these approaches either do not take the input features (in our case word embeddings) into account, or they need to learn the noise modeling from scratch which can be difficult in a low-resource setting. We propose to cluster the training data using the input features and then compute different confusion matrices for each cluster. To the best of our knowledge, our approach is the first to leverage feature-dependent noise modeling with pre-initialized confusion matrices. We evaluate on low-resource named entity recognition settings in several languages, showing that our methods improve upon other confusion-matrix based methods by up to 9%.Comment: Published at EMNLP-IJCNLP 201

The MESA accelerometer for space application

An electrostatically suspended proof mass in the Miniature Electrostatic Accelerometer (MESA) is used to measure acceleration in the submicro-g range. Since no fixed mechanical suspension (such as springs or strings) is used, the constrainment scaling can be changed electrically after being placed in orbit. A single proof mass can sense accelerations in three axes simultaneously. It can survive high-g pyrotechnic-generated shocks and launch environments while unpowered