Miracle-dz/UniFAR-FTUs huggingface dataset:
Observed Influence of North Pacific SST Anomalies on the Atmospheric Circulation

Abstract A lagged maximum covariance analysis (MCA) of monthly anomaly data from the NCEP–NCAR reanalysis shows significant relations between the large-scale atmospheric circulation in two seasons and prior North Pacific sea surface temperature (SST) anomalies, independent from the teleconnections associated with the ENSO phenomenon. Regression analysis based on the SST anomaly centers of action confirms these findings. In late summer, a hemispheric atmospheric signal that is primarily equivalent barotropic, except over the western subtropical Pacific, is significantly correlated with an SST anomaly mode up to at least 5 months earlier. Although the relation is most significant in the upper troposphere, significant temperature anomalies are found in the lower troposphere over North America, the North Atlantic, Europe, and Asia. The SST anomaly is largest in the Kuroshio Extension region and along the subtropical frontal zone, resembling the main mode of North Pacific SST anomaly variability in late winter.
The GAPS Programme with HARPS-N at TNG VIII: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting planetary systems HAT-P-36 and WASP-11/HAT-P-10

We determine the true and the projected obliquity of HAT-P-36 and WASP-11/HAT-P-10 systems, respectively, which are both composed of a relatively cool star and a hot-Jupiter planet. Thanks to the high-resolution spectrograph HARPS-N, we observed the Rossiter-McLaughlin effect for both the systems by acquiring precise radial-velocity measurements during planetary transit events. We also present photometric observations comprising six light curves covering five transit events, obtained using three medium-class telescopes and the telescope-defocussing technique. One transit of WASP-11/HAT-P-10 was followed simultaneously from two observatories. The three transit light curves of HAT-P-36b show anomalies that are attributable to starspot complexes on the surface of the parent star, in agreement with the analysis of its spectra that indicate a moderate activity. By analysing the complete HATNet data set of HAT-P-36, we estimated the stellar rotation period by detecting a periodic photometric modulation in the light curve caused by star spots, obtaining Prot=15.3 days, which implies that the inclination of the stellar rotational axis with respect to the line of sight is 65 degree. We used the new spectroscopic and photometric data to revise the main physical parameters and measure the sky-projected misalignment angle of the two systems. We found \lambda=-14 degree for HAT-P-36 and \lambda=7 degree for WASP-11/HAT-P-10, indicating in both cases a good spin-orbit alignment. In the case of HAT-P-36, we also measured its real obliquity, which turned out to be 25 degrees.
Contractional nature of Devonian-Mississippian Antler tectonism along the North American continental margin

Regional tectonic analysis suggests that the entire Cordilleran continental margin, from Nevada to the Yukon, underwent contractional orogeny involving emplacement of deep basinal, submarine-fan, and mafic volcanic strata over autochthonous continental margin strata during Late Devonian to Mississippian time (Antler orogeny). Displaced parautochthonous strata are present from Nevada to east-central British Columbia, and perhaps within the Yukon-Tanana terrane of Yukon and eastern Alaska. Manifestations of the orogenic event in the northern Cordillera are preserved primarily by normal faults and related coarse clastic strata of the Selwyn basin. We propose that these features formed due to flexural extension during foreland deformation, rather than mid-Paleozoic rifting or transtension.
Reconstructing a website's lost past Methodological issues concerning the history of Unibo.it

This paper describes how to deal with the scarcity of born-digital primary sources while retrieving materials on the recent past of an academic institution. The case study is an analysis of the first 25 years online of the University of Bologna. The focus of this work is primarily methodological: several different issues are presented, starting with the fact that the University of Bologna website has been excluded for thirteen years from the Internet Archive's Wayback Machine, and possible solutions are proposed and applied. Moreover, this study aims at highlighting how web materials could give us new and distinct insights into the recent past of academic institutions, thereby becoming the starting point for several new studies.
A HIGH RESOLUTION GRAVIMETRIC GEOID OF THE EASTERN AFRICA REGION

AbstractA high resolution gravimetric geoid has been determined for the eastern African region bounded by latitude −5° ≤ ϕ ≤ 5°, longitude 29° E. ≤ λ ≤ 42° E. , comprising Kenya, Uganda and part of Tanzania. The geoid was determined at a resolution grid of 5 minutes of arc. The Geodetic Reference System 1980 (GRS80) was used. The data used included the OSU91A global geopotential model, a recent terrestrial gravity data anomaly set, satellite altimetry data and digital terrain models. The spherical one-dimensional fast Fourier transform method was used to compute the geoid heights residual to OSU91A. Comparisons are made with geometric heights derived from results of the African Doppler Survey Project (ADOS).
HST-NICMOS Observations of M31's Metal Rich Globular Clusters and Their Surrounding Fields: II. Results

We have obtained HST-NICMOS observations of five of M31's most metal rich globular clusters: G1, G170, G174, G177&G280. For the two clusters farthest from the nucleus we statistically subtract the field population and estimate metallicities using K-(J-K) color-magnitude diagrams (CMDs). Based on the slopes of their infrared giant branches we estimate [Fe/H]=-1.22+/-0.43 for G1 and -0.15+/-0.37 for G280. We combine our infrared observations of G1 with two epochs of optical HST-WFPC2 V-band data and identify at least one LPV based on color and variability. The location of G1's giant branch in the K-(V-K) CMD is very similar to that of M107, indicating a higher metallicity than our purely infrared CMD: [Fe/H]=-0.9+/-0.2. For the field surrounding G280, we estimate the metallicity to be -1.3 with a spread of 0.5 from the slope and width of the giant branch. Based on the numbers and luminosities of the brightest giants, we conclude that only a small fraction of the stars in this field could be as young as 2 Gyr, while the majority have ages closer to 10 Gyr. The K-band luminosity functions (LFs) of the upper few magnitudes of G1 and G280, as well as for the fields surrounding all clusters, are indistinguishable from the LF measured in the bulge of our Galaxy. This indicates that these clusters are very similar to Galactic clusters, and at least in the surrounding fields observed, there are no significant populations of young luminous stars.
Polarimetric RADARSAT-2 imagery for soil moisture retrieval in alpine areas

In this work, the polarimetric capability of RADARSAT-2 images is exploited in the aim of soil moisture content retrieval in Alpine meadows and pastures. Three feature extraction methods are investigated: the simple polarimetric intensity and phase processing, the H/A/α polarimetric decomposition, and the Independent Component Analysis (ICA). The features extracted according to these strategies were assessed for their capability to improve the soil moisture estimation by considering both quantitative performance on a set of reference samples and qualitative analysis of the corresponding output soil moisture content maps. The method proposed for the soil moisture estimation was based on the Support Vector Regression technique combined with an innovative multi-objective model selection strategy. The results indicated that the use of polarimetric features such as HH and HV channels improved the estimation of soil moisture content in the investigated mountain area, especially because the HV channel was able to disentangle the vegetation effect on the radar signal. From the preliminary results presented in this paper, the use of the H/A/α polarimetric decomposition and the ICA technique seem to not determine a significant improvement in the soil moisture estimation.
Amphibolite dehydration-melting: sorting out the solidus

Abstract Amphibolite melts under vapour-absent conditions by dehydration-melting, during which H2O released from hornblende is transferred directly into H2O-undersaturated silicate liquid. Five independent 1991 studies on amphibolite dehydration-melting differ from each other and from earlier conceptual treatments. Five solidi between 7 and 10 kb vary from 975°C to 740°C. Two solidi above 10 kb are near-vertical, near 975°C and 850°C. Some differences are due to different amphibolite compositions and mineralogy. We use the results of earlier experiments involving garnet, supported by our own new results, to construct a closed-system phase diagram for a simple, fully-hydrated amphibolite (hornblende + plagioclase) showing the solidus and the melting interval for (hornblende + garnet + other minerals + liquid). The amphibolite vapour-absent solidus is defined by the beginnings of two multivariant reactions: (1) a near-vertical curve (large positive dP/dT) where the formation of augite dominates; and (2) a near-horizontal curve at higher pressures where the formation of garnet dominates. The solidus curve bends back (estimated near 900°C, 9 kb) with slope changing to low positive dP/dT. The new phase diagram expands the field for liquid generation with garnet-amphibolite residues to much lower temperatures and pressures than the other recent experimental results, increasing the range from which small amounts of hydrous granitoid melts may be segregated by compaction. The reversed, near-horizontal slope of the solidus near 10 kb has interesting petrological consequences.
Distribution of basal melting and freezing beneath tributaries of Ice Stream C: implication for the Holocene decay of the West Antarctic ice sheet

Abstract Ice-stream tributaries connect the relatively slow-moving interior of the West Antarctic ice sheet (WAIS) with the fast-flowing Siple Coast ice streams. Basal water underneath these ice streams reduces basal resistance and enables the fast motion of the ice. Basal melting being the only source for this water, it is important to include the distribution of basal melting and freezing into numerical models assessing the stability of the WAIS. However, it is very difficult to constrain its distribution from existing field observations. Past borehole observations confirmed the presence of a wet bed at Byrd Station in the WAIS interior and at different locations within Siple Coast ice streams. However, the recent discovery of a 12–25m thick sediment-laden bubble-free basal ice layer at the UpC boreholes indicates that basal freezing is either currently occurring or had occurred upstream during the last glacial–interglacialcycle.We use a flowline model of ice thermodynamics to assess and quantify the spatial and temporal distribution of basal melting and freezing beneath Ice Stream C tributaries, taking into account the geothermal flux, shear heating and heat conduction away from the bed. Under the assumption that the ice was moving over a weak bed (τb =1–10 kPa) our model is able to reproduce a layer of frozen-on ice similar in thickness to the UpC “sticky spot” basal ice layer. Increased basal melting in the early Holocene possibly could have initiated the Holocene decay of the WAIS, whereas increased freezing rates over the past few thousand years could have decreased the amount of basal water in the system, resulting in a strengthening of the bed. This is consistent with current force-budget calculations for ice-stream tributaries and with observed stoppages and slow-downs of ice streams.
Mod-$\phi $ convergence: Approximation of discrete measures and harmonic analysis on the torus

In this paper, we relate the framework of mod-$\phi$ convergence to the construction of approximation schemes for lattice-distributed random variables. The point of view taken here is that of Fourier analysis in the Wiener algebra, allowing the computation of asymptotic equivalents in the local, Kolmogorov and total variation distances. By using signed measures instead of probability measures, we are able to construct better approximations of discrete lattice distributions than the standard Poisson approximation. This theory applies to various examples arising from combinatorics and number theory: number of cycles in (possibly coloured) permutations, number of prime divisors (possibly within different residue classes) of a random integer, number of irreducible factors of a random polynomial, etc. One advantage of the approach developed in this paper is that it allows us to deal with approximations in higher dimensions as well. In this setting, we can explicitly see the influence of the correlations between the components of the random vectors in our asymptotic formulas.
Sediment Transport Formula for Steep Channels

A description is given and results presented of experiments to investigate the sediment capacity of stream flows on flume slopes of up to 20%. A comparison of the results with values predicted by the Meyer-Peter Mueller equation shows that the latter equation seriously underestimates sediment transport capacity on slopes steeper than 3%, mainly because of deficiencies in the form resistance factor. A new equation is proposed, giving the transport capacity for materials with grain sizes larger than 0.4 mm (0.016 in.). The equation is calibrated by both the original Meyer-Peter data and new steep flume experiments and modified to incorporate the effect of nonuniform sediment grain size distributions. With flow depths calculated by the Manning-Strickler equation the new equation still gives excellent estimates of sediment capacity.
Seismic observation of narrow plumes in the oceanic upper mantle

We have found seismic evidence for the existence of narrow (about 200 km diameter) and hot plumes in the upper mantle above the 410 km discontinuity. They are located mainly under ocean islands, not however, under the central parts of major continents. These results are obtained from comparing globally the observed travel time differences between Ps conversions and SS precursors from the discontinuity at 410 km depth, using published data and new observations from ocean island stations. Comparison of SS precursors and Ps conversions, however, leads also to indications of significantly fewer narrow plumes in the upper mantle transition zone between 410 and 660 km depth, than in the upper mantle above 410 km depth.
The Fornax Deep Survey with VST. IX. On the assembly history of the bright galaxies and intra-group light in the Fornax A subgroup

We present the study of the south-west group in the Fornax cluster centred on the brightest group galaxy (BGG) Fornax A, observed as part of the Fornax Deep Survey (FDS). This includes the analysis of the bright group members (mB<16 mag) and the intra-group light (IGL). The main objective of this work is to investigate the assembly history of the Fornax A group and to compare its physical quantities as a function of the environment to that of the Fornax cluster core. For all galaxies, we extract the azimuthally averaged surface brightness profiles in three optical bands (g, r, i) by modelling the galaxy's isophotes. We derive their colour profiles and structural parameters in all respective bands. The long integration time and large covered area of the FDS allow us to also estimate the amount of IGL. The majority of galaxies in the Fornax A group are late-type galaxies (LTGs), spanning a range of stellar mass of $8<log (M_* M_{\odot})<10.5$. Six out of nine LTGs show a Type III (up-bending) break in their light profiles, which is either suggestive of strangulation halting star-formation in their outskirts or their HI-richness causing enhanced star-formation in their outer-discs. The estimated luminosity of the IGL is $6 \pm 2 \times 10^{10} L_{\odot}$ in g-band, which corresponds to about 16% of the total light in the group. The Fornax A group appears to be in an early stage of assembly with respect to the cluster core. The environment of the Fornax A group is not as dense as that of the cluster core, with all galaxies except the BGG showing similar morphology, comparable colours and stellar masses, and Type III disc-breaks, without any clear trend of these properties with group-centric distances. The main contribution to the IGL is from the minor merging in the outskirts of the BGG NGC1316 and, probably, the disrupted dwarf galaxies close to the group centre.
Dynamical containment of Antarctic ozone depletion

Over the past two decades both the severity of Antarctic ozone depletion and the size of the Antarctic ozone hole have increased. A satellite‐based, assimilated total column ozone data set and NCEP/NCAR meteorological fields from 1979 to 2000 have been used to examine the long‐term evolution of the ozone hole and its dependence on the size of the dynamical vortex and the size of the region of low temperatures. Equivalent latitude zonal means of these data have been calculated to show more directly the expansion of the Antarctic ozone hole and its encroachment on the vortex edge. While the size of the dynamical vortex and the vortex region with temperatures below 195 K (where polar stratospheric clouds are expected to form) has changed little, the area with ozone below 220 DU (the contour defining the ozone hole) has steadily increased. Over the 20 year period, the severity of the ozone depletion within the core of the vortex has increased. This, combined with the nature of the mixing regimes within the polar vortex may explain the increase in the area of the ozone hole.
Common Tangents of Two Disjoint Polygons in Linear Time and Constant Workspace

We provide a remarkably simple algorithm to compute all (at most four) common tangents of two disjoint simple polygons. Given each polygon as a read-only array of its corners in cyclic order, the algorithm runs in linear time and constant workspace and is the first to achieve the two complexity bounds simultaneously. The set of common tangents provides basic information about the convex hulls of the polygons—whether they are nested, overlapping, or disjoint—and our algorithm thus also decides this relationship.
Isopodichnus in a trace fossil assemblage from the Old Red Sandstone

Isopodichnus stromnessi sp. nov. from the Lower Stromness Flags of Orkney is described in detail, and the range of variation in the traces ascribed to different habits of different sized individuals producing the traces. Activity diagrams illustrate scme of the burrowing habits of the organism. Isopodichnus is typical of non-marine strata, particularly those of shallow impermanent lacustrine environments, and can be distinguished from Cruziana on the basis of the shape of the trace ending. AsSociated burrows are briefly described and indicate the presence of a hitherto undescribed invertebrate fauna associated with the Orcadian flagstone sequence of the Middle Old Red Sandstone.
Tenth Canadian Geotechnical Colloquium: Recent developments in consolidation of natural clays

A global analysis of the consolidation of natural clays is realized considering the consolidation process to be a combination of the effects of compressibility and of permeability. The compressibility or stress–strain curve followed is strongly influenced, both in the laboratory and in situ, by the strain rate. The self-boring permeameter appears to be an excellent tool for permeability measurement; however, in homogeneous clays direct measurement in the laboratory also gives representive results. The coefficients of consolidation determined graphically strongly underestimate the in situ coefficient. The consolidation must thus be analysed by considering compressibility and permeability parameters measured separately. Key words: consolidation, clay, compressibility, permeability.
Towards a language for coherent enterprise architecture descriptions

A coherent description of architectures provides insight, enables communication among different stakeholders and guides complicated (business and ICT) change processes. Unfortunately, so far no architecture description language exists that fully enables integrated enterprise modeling. In this paper we focus on the requirements and design of such a language. This language defines generic, organization-independent concepts that can be specialized or composed to obtain more specific concepts to be used within a particular organisation. It is not our intention to re-invent the wheel for each architectural domain: wherever possible we conform to existing languages or standards such as UML. We complement them with missing concepts, focusing on concepts to model the relationships among architectural domains. The concepts should also make it possible to define links between models in other languages. The relationship between architecture descriptions at the business layer and at the application layer (business-IT alignment) plays a central role.
Stability of the Brascamp-Lieb constant and applications

abstract:We prove that the best constant in the general Brascamp-Lieb inequality is a locally bounded function of the underlying linear transformations. As applications we deduce certain very general Fourier restriction, Kakeya-type, and nonlinear variants of the Brascamp-Lieb inequality which have arisen recently in harmonic analysis.
Correction to “New parameterization of sulfuric acid‐ammonia‐water ternary nucleation rates at tropospheric conditions”

[1] In the paper ‘‘New parameterization of sulfuric acidammonia-water ternary nucleation rates at tropospheric conditions’’ by J. Merikanto et al. (J. Geophys. Res., 112, D15207, doi:10.1029/2006JD007977, 2007) the reported coefficients in the parameterized equation are numerically inaccurate for the calculation of ternary nucleation rates. The coefficients were given with six significant digits. However, this precision is not sufficient. Coefficients with 16 significant digits are given in Table 1. We also provide a Fortran code that calculates the reported parameterized nucleation rates and critical cluster sizes accurately (see auxiliary material). [2] Also, the term containing f15 in equation (8) in paragraph 18 should be multiplied by RH. The correct equation is
Vertical variations of rain intensity in different rainy periods in and around Bangladesh derived from TRMM observations

In this paper, differences in rain intensity in and around Bangladesh during various rainy periods are described. The data were obtained from tropical rainfall measuring mission (TRMM) ‐2A25, ‐3B42 and ‐3B43. The version 5 (V5) 3B42 daily products overestimated rainfall in pre‐monsoon and post‐monsoon periods but underestimated it in the monsoon period compared with rain‐gauge data. The version 6 (V6) daily products reduced the over‐ and under‐estimation of rainfall. On the basis of the analysed rainfall characteristics in different rainy periods, the 2A25 data was analysed to reveal the vertical variations of rain intensity. Pre‐monsoon rainfall was characterized by convective rain with strong intensity upto high altitudes and high echo tops that usually occurred over land and not over the Bay of Bengal. In contrast, during monsoon, intense rain occurred over the Bay of Bengal and land; however, the existence of strong and high echo tops was less significant than that during the pre‐monsoon period. The radar echo tops and the height of strong rain intensity measured in the post‐monsoon period were lower than those obtained in the monsoon period. Copyright © 2007 Royal Meteorological Society