3,095 research outputs found
PHOTOGRAMMETRIC UNDERWATER AND UAS SURVEYS OF ARCHAEOLOGICAL SITES: THE CASE STUDY OF THE ROMAN SHIPWRECK OF TORRE SANTA SABINA
The 2020 underwater archaeological research in the inlet of Torre Santa Sabina – Baia dei Camerini (Municipality of Carovigno, Brindisi, Italy) represented the first phase of the pilot intervention of the Interreg Italia-Croatia UnderwaterMuse project. The project aims to enhance and make accessible the vast underwater heritage of the areas involved; this will be done by creating submerged archaeological parks and using virtual reality's narrative and communicative tools and platforms. During the 2020 campaign, different survey activities were carried out using several techniques and methodology to produce the area's multi-scale documentation. First of all, the entire stretch of coast was mapped with UASs (Uncrewed Aerial Systems) flights to reconstruct the coastal landscape in various phases. Furthermore, an underwater photogrammetric survey carried out by expert scuba divers has been achieved in the wreck's aft area (the site analyzed during the 2020 excavation activities). The fruitful synergy between the various actors involved and the support of the territory and the community has allowed the achievement of this campaign's objectives, preliminary to the broader and more articulated intervention foreseen for the following year
Photogrammetric underwater and UAS surveys of archaeological sites: the case study of the Roman shipwreck of Torre Santa Sabina
The 2020 underwater archaeological research in the inlet of Torre Santa Sabina - Baia dei Camerini (Municipality of Carovigno,
Brindisi, Italy) represented the first phase of the pilot intervention of the Interreg Italia-Croatia UnderwaterMuse project. The project
aims to enhance and make accessible the vast underwater heritage of the areas involved; this will be done by creating submerged
archaeological parks and using virtual reality's narrative and communicative tools and platforms. During the 2020 campaign, different
survey activities were carried out using several techniques and methodology to produce the area's multi-scale documentation. First of
all, the entire stretch of coast was mapped with UASs (Uncrewed Aerial Systems) flights to reconstruct the coastal landscape in various
phases. Furthermore, an underwater photogrammetric survey carried out by expert scuba divers has been achieved in the wreck's aft
area (the site analyzed during the 2020 excavation activities). The fruitful synergy between the various actors involved and the support
of the territory and the community has allowed the achievement of this campaign's objectives, preliminary to the broader and more
articulated intervention foreseen for the following year
Genetic and Phenotypic Analysis of Meat Quality Traits in Buffalo Beef and Correlations to Carcass Composition
Abstract: Meat quality traits in buffalo beef were examined and their genetic parameters and genetic correlations to carcass composition were estimated. Dissection was performed on 40 buffalo beef carcasses and all traits recorded for each animal, as well as the weight on muscle lungissimus dorsi (LD). The temperature and pH were recorded at 1 and 48h post-slaughter. Intramuscular fat, protein, dry matter, meat colour (redness, a*, yellowness b* and lightness L*) were recorded. Hereditability estimates ranged from 0.12 and 0.99 for dissection traits and 0.61 and 0.68 for meat quality traits, which was significant for all traits except for ultimate pH and b*. Genetic correlation with L* were negative for a* and high and positive for b*. Intramuscular fat was moderate to highly genetically correlated to the a*, b* and half hot carcass weight. The not significant genetic correlation found between several of the meat quality traits, and between meat quality traits and carcasses composition traits, suggests that the meat quality traits analyzed should be implemented into breeding programme with care since their full effect on the other traits under selection cannot be accurately estimated. For more accurate estimates, further studies that especially include a large number of records for colour meat measures are needed
Use of mixed study techniques in the evaluation of coastline dynamics - the “Porto Cesareo” MPA case of study
In recent decades, the much-discussed climate changes with the consequent
variations in sea and weather conditions and the rise of the mean sea level are causing an
indisputable set of negative actions on the entire coastal system mainly due to the increase
of the erosive phenomenon along the shorelines. These critical scenarios have a major
impact even on a local scale, and because of that, we decided to study a well knows tract of
rocky/sandy mixed coast, in a highly anthropized area, even if located inside the “Porto
Cesareo” Marine Protected Area (MPA) (Ionian Sea, Gulf of Taranto, Puglia Region, Italy).
The high naturalistic and archaeological value of this area calls for a greater institutional
effort in the study of erosional phenomena. Several historical documents from other studies
point out that this coastal area is an ideal place for this kind of research. The effects of
coastal erosion and anthropic pressures along this tract of coast require adequate efforts for
a consistent and rapid evaluation of the coastal dynamics. The methodologies proposed in
this work are based on mixed techniques from different fields of study, integrating recent
aero photogrammetry surveys with drones, aerial images acquired by the Italian Military
Geographic Institute (IGM), elaboration of paleoshorelines related by underwater
archaeological markers and their dating, and finally on the elaboration of satellite products
useful for the study of vast areas. The monitoring of coastal areas and the evaluation of
shoreline dynamics are core topics in the implementation of managing actions of decision makers on a local, regional, national, and international scale, above all in places like the
chosen one, inside an MPA. Remote sensing through the use of RPAS (Remotely Piloted
Aircraft Systems or Drones) has proved to be very useful for identifying phenomena that
act on a small spatial scale and in supporting and implementing protective measures
according to the adaptive management approach, through multi-year surveys on habitats of
conservation interest [18]. For the implementation of fine-scale monitoring actions, we
have chosen products from the Sentinel satellite of the Copernicus constellation (European
Space Agency - ESA). In this context, the use of satellite products provides a recurrent
view of the ground, useful in the short and long-term monitoring of changes in wide coastal
areas, and in particular, offers a coastline positioning evaluation in near real-time. Local
monitoring actions performed in recent years have already shown an erosive trend in the
past decades, and even, negative forecasts for the next decade, so further surveys with
mixed methodologies could be crucial in the evaluation of the evolution of this particular
coastal area by local authorities
Faint, Evolving Radio AGN in SDSS Luminous Red Galaxies
We detect and study the properties of faint radio AGN in Luminous Red
Galaxies (LRGs). The LRG sample comprises 760,000 objects from a catalog of LRG
photometric redshifts constructed from the Sloan Digital Sky Survey (SDSS)
imaging data, and 65,000 LRGs from the SDSS spectroscopic sample. These
galaxies have typical 1.4 GHz flux densities in the 10s-100s of microJy, with
the contribution from a low-luminosity AGN dominating any contribution from
star formation. To probe the radio properties of such faint objects, we employ
a stacking technique whereby FIRST survey image cutouts at each optical LRG
position are sorted by the parameter of interest and median-combined within
bins. We find that median radio luminosity scales with optical luminosity
(L_opt) as L_1.4 GHz ~ L_opt^(beta), where beta appears to decrease from beta ~
1 at z = 0.4 to beta ~ 0 at z = 0.7, a result which could be indicative of AGN
cosmic downsizing. We also find that the overall LRG population, which is
dominated by low-luminosity AGN, experiences significant cosmic evolution
between z = 0.2 and z = 0.7. This implies a considerable increase in total AGN
heating for these massive ellipticals with redshift. By matching against the
FIRST catalog, we investigate the incidence and properties of LRGs associated
with double-lobed (FR I/II) radio galaxies. (Abridged)Comment: 12 pages, 9 figures, Accepted by A
Gpr investigation at the archaeological site of le cesine, lecce, italy
In this contribution, we present some results achieved in the archaeological site of Le Cesine, close to Lecce, in southern Italy. The investigations have been performed in a site close to the Adriatic Sea, only slightly explored up to now, and where the presence of an ancient Roman harbour is alleged on the basis of remains visible above all under the current sea level. This measurement campaign has been performed in the framework of a short-term scientific mission (STSM) performed in the framework of the European Cost Action 17131 (acronym SAGA), and has been aimed to identify possible points where future localized excavation might and hopefully will be performed in the next few years. Both a traditional elaboration and an innovative data processing based on a linear inverse scattering model have been performed on the data
Millstones as indicators of relative sea-level changes in northern Sicily and southern Calabria coast lines, Italy
New data are presented for late Holocene relative sea-level changes in two coastal sites of Sicily and
Calabria, southern Italy. Reconstructions are based on precise measurements of submerged archaeological
remains that are valuable indicators of past sea-level position. The archaeological remains are
millstone quarries carved on sandstone coastal rocks and nowadays partially submerged which, to the
authors’ knowledge, are used for the first time as sea-level markers. Millstones of similar typology are
located on the coast of Capo d’Orlando (northern Sicily) and Capo dell’Armi (southern Calabria). When
the archeologically-based sea-level position is compared with the shoreline elevation provided by
geological markers (Holocene beachrock, Late Pleistocene marine terraces), a refined understanding of
relative sea-level changes and rates of vertical tectonic movements for these coastline locations is gained
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