178,780 research outputs found
Preface to Tectonophysics, 347, 1-3 (2002)
No full textAntarctica is the most poorly understood region of our planet. It, however, maintains an important geologic record of the Gondwana and Rodinia evolution and therefore is a center of extensive scientific inquiry.
Magnetic data provide a critical window for geological studies due to the nearly ubiquitous snow and ice cover of this forbidding region. Consequently, numerous
magnetic surveys have been carried out for site-specific geologic objectives since the International Geophysical Year 1957/1958.
Plans for an international project to process and combine these disparate data sets into a single magnetic anomaly map were formulated at the 1993 meeting of the International Association of Geomagnetism and Aeronomy (IAGA) in Buenos Aires, Argentina.
Both IAGA and the Scientific Committee on Antarctic Research (SCAR) passed resolutions of encouragement (Johnson et al., 1996; Chiappini et al., 1999). At a 1995 workshop at the British Antarctic Survey in Cambridge, UK, it became clear that these individual
magnetic surveys could indeed be combined into a regional synthesis to further enhance their utility for geological studies (Johnson et al., 1996, 1997; Chiappini et al., 1998, 1999).
Accordingly, the Antarctic Digital Magnetic Anomaly Project (ADMAP) was launched at this first workshop (ADMAP I) to compile and integrate into a digital database existing near-surface and satellite magnetic anomaly data of Antarctica and the surrounding oceans
south of 60jS. An international working group of 32 scientists from eight countries that operate magnetic programs in the Antarctic was established. The working group adopted protocols for making existing and future magnetic data sets available to this international effort. In particular, existing Antarctic magnetic data holdings will be deposited in the world data centers by the end of this first phase of the project in 2002.Published1-23.2. Tettonica attiva3.4. GeomagnetismoJCR Journalreserve
Data for: Exchange rate movements in Emerging Economies. Global vs Regional factors in Asia
No full textThe files are:- Base_TC is an Excel file corresponding to the database on nominal exchange rates used in the analysis;- Base_TCER is an Excel file corresponding to the database on real exchange rates used in the analysis;- factors is an Eviews workfile used for the estimation of VAR and ARDL model
Forward magnetic models across the southern Apennines: implications for the basement setting
No full textWe discuss here the forward magnetic modeling, along a southern
Apennines transect, of the new magnetic map of Italy (CHIAPPINI
et alii, 2000a). This map has been realized through an integrated
digital magnetic anomaly database built for the Italian territory and
the surrounding sea. For the first time, all the magnetic observations
made onshore and offshore the Italian peninsula have been compiled
into a new digital database, that gives a complete regional scale
view of the magnetic anomaly crustal field over the area. The new
magnetic map shows a low-amplitude (~20 nT), long-wavelength
positive anomaly along the external southern Apennines, and negative
anomalies over both the Tyrrhenian margin of southern Italy
and the Apulian foreland. South of the Vulture volcano (~41° N), the
positive magnetic anomaly is elongated and exactly parallel to the
external belt. Furthermore, the eastern anomaly margin is exactly
parallel to the belt front, and located few tens of kilometers southwest
of it. The negative pattern of the Tyrrhenian Sea and margins is
likely due to the high thermal flow, which significantly reduces the
thickness of the susceptive crustal layer. A magnetic modeling was
performed along a selected southern Apennines transect (located ca.
50 km south of the CROP04 profile), where the shallow crustal setting
(down to 5-6 km depth) is well-known by seismic and drill-hole
data. Seismic data and oil wells suggest that the top of the magnetic
basement cannot be shallower in the belt than in the Apulian foreland,
where it was reached at ~6 km depth by the Puglia 1 well.
Therefore, the positive signature of the external southern Apennines
requires a strongly magnetic body beneath the belt. This source
must be definitely more susceptive than the basement of the Apulian
foreland. Since the solution of magnetic modeling is not unique, we
show here three different settings that are able to bring into coincidence
the observed and modeled residuals. First, we speculate that,
within the belt, the basement located beneath the Apulian carbonates
(Apulian basement) is differentiated and contaminated at depth
by susceptive magmas or mantle fluids. Then, we explore the possibility
that a very magnetic composite internal crustal wedge is tectonically
interposed between the Apulian carbonates and basement.
Two possible settings of such composite wedge are modeled and
discussed. The uniformity of the magnetic anomaly pattern along
250 km of the belt, the remarkable parallelism between the southern
Apennine positive residuals and the superficial belt front, associated
with the gravity data, the estimates of Moho depth, and the flexural
behavior of the Apulian lithosphere beneath the belt, support the
two latter models.Published13-203.4. GeomagnetismoJCR Journalreserve
Le iscrizioni sepolcrali e civili di Ferrara con le piante delle chiese raccolte da Cesare Barotti: San Carlo, Santa Maria Nuova e San Pietro
No full textExperimental characterisation of a novel thermal energy storage based on open-cell copper foams immersed in organic phase change material
No full textA Geodatabase for Multisource Data Management Applied to Cultural Heritage: The Case Study of Villa Buonaccorsi's Historical Garden
No full textIn recent years, the digitization of historical data related to the architectural heritage and the development of ICT-based methodologies applied to cultural goods have become increasingly relevant. In this context, the use of GIS (Geographical Information System) is growing significantly, with the aim of collecting, analysing and managing heterogeneous data in a spatial context. Given such premise, the site identified for this case-study is a historical Italian Garden into the Villa Buonaccorsi in Potenza Picena (MC, Italy). The project aims at creating a methodology, that organizing natural and artificial elements in the GIS, to support management and planning of this landscape architecture, considering also the changes during the time. A suitable GIS can promote and ensure a correct use of the heritage knowledge, preserving the historical identity, overlaying the data. The data management system, specifically developed for this case, is based on an open source GIS, where surveyed data coming from different sources and the relation to the attributes have been descripted in a conceptual model. The inventory of this geodatabase, in a dedicated GIS, has allowed to perform some queries, making in output a dialogue box with all the information, in form of report, useful to the manager of a historical garden. The structure of the GIS can significantly to help who works with similar cases and it can be useful for analysis, management, storage and integration of information related to Italian gardens
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Le imprese spin-off della ricerca nell esperienza internazionale e nazionale: il caso della Scuola Superiore Sant Anna di Pisa.
No full textExplaining the Ba, Y, Sr, and Eu abundance scatter in metal-poor halo stars: constraints to the r-process
No full textCalibration HPGe detector using IAEA-U source for CBRNe
No full textDetecting and preventing the illicit movement of radioactive materials within a country is crucial, requiring the identification of radiologic anomalies against the normal radiation background. High-purity germanium (HPGe) detectors, known for their precision and sensitivity, have become popular for analyzing radioactive materials in CBRNe scenarios. This study focused on calibrating an HPGe detector for CBRNe applications, using gamma-ray spectra from an IAEA-U reference source. Energy calibration involved identifying peaks in the spectra and creating a calibration curve for energy and channel number data. Efficiency calibration, determined using the known activity of the source, revealed a linear relationship between energy and detector response. Over four years, systematic efficiency calibrations showed a deviation of only 3% well below the recommended limit of 5%. These findings underscore the reliability of the system as a reference spectrometry method for accurate detection of radioactive materials
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