Search results for " black"
showing 10 items of 317 documents
Bridge over Troubled Water: Italy and the Black Mediterranean
2022
Since ancient times, Italy has served as a bridge between Africa and Europe, facilitating exchanges of goods, crops, legends, human beings, and deities. In recent decades, this role has come back to everyone’s attention because of the flows that have turned the Mediterranean into one of the main crossroads on the global migratory chessboard. Several young Africans have embarked the Mediterranean Passage. Some have arrived to the opposite shore, whereas some have not. The survivors have reshaped the history of the African Diaspora. The history of the Black Mediterranean resonates with that of the Black Atlantic. Moreover, the considerable presence of an African Italian community inevitably l…
L’incidentalità stradale in relazione ai punti critici delle infrastrutture. Il caso di Palermo.
2010
On the location of the supermassive black hole in CTA102
2015
Relativistic jets in active galactic nuclei represent one of the most powerful phenomena in the Universe. They form in the surroundings of the supermassive black holes as a by-product of accretion onto the central black hole in active galaxies. The flow in the jets propagates at velocities close to the speed of light. The distance between the first part of the jet that is visible in radio images (core) and the black hole is still a matter of debate. Only very-long-baseline interferometry observations resolve the innermost compact regions of the radio jet. Those can access the jet base, and combining data at different wavelenghts, address the physical parameters of the outflow from its emiss…
ECONOMIC CRISIS SUSTAINS BLACK MARKET
2012
The purpose of this research is to bring out the fact that during the periods of economic crisis, the black market finds a warm place to develop and even to diversify the ways of expressing. Based on some data of the National Institute of Statistics and the Organization for Economic Co-operation and Development (OECD1 ) , I’m trying to prove the fact that during the last two years while the world economic crisis has occurred, the black market has been increasing and there have been new forms of expressing this phenomenon. Although there are some positive ways of this phenomenon, on the whole, the increasing of the black market percent of GDP represents a wound within a healthy economy, whic…
Antônio Etíope e Benedito, o mouro: o escravinho Santo e o preto eremita
2009
This article discusses the process of canonization of two African slaves, Benedict and Anthony, who were taken to Sicily through a combination of privacy wars, the slave trade and conflicts between Christian states and the Ottoman Empire in the context of modern-era Mediterranean. Along with other "servants of God" with exemplary lives, they both joined the Franciscan Order and were elevated to the altar after their deaths, while enslaved Christians in African territory "took the turban" with some even became local Muslim authorities. Sicily, a Spanish vice-kingdom near the northern African coast, was a cultural crossroad and for at the same time a privileged laboratory for the activity of …
Nanocompositi a base polimerica a durabilità modulata mediante il controllo delle proprietà antiossidanti di nanostrutture carboniose
Population Properties of Compact Objects from the Second LIGO-Virgo Gravitational-Wave Transient Catalog
2021
Abbott, R., et al. (LIGO and Virgo Collaboration)
The advanced Virgo longitudinal control system for the O2 observing run
2020
Following a successful period of data-taking between 2006 and 2011, the Virgo gravitational-wave detector was taken offline for a major upgrade. The changes made to the instrument significantly increased the complexity of the control systems and meant that an extended period of commissioning was required to reach a sensitivity appropriate for science data-taking. This commissioning period was completed in July of 2017 and the second-generation Advanced Virgo detector went on to join the Advanced LIGO detectors in the O2 science run in August of the same year. The upgraded detector was approximately twice as sensitive to binary neutron star mergers as the first-generation instrument. During …
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
2017
On August 17, 2017 at 12-41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0×104 years. We infer the component masses of the binary to be between 0.86 and 2.26 M, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M, with the total mass of the system 2.74-0.01+0.04M. The source was localized within a sky region of 28 deg2 (90% probabili…
Study of oral microbiota and diet as casual factors of Black Stains in the pediatric patient
2019
The aim of the following study is to identify and quantify microorganisms in the saliva of black stain patients using species-specific probes for Actinomyces israelii, Actinomyces naeslundii, Streptococcus mutans and Lactobacillus spp, as well as a universal probe for bacterial 16S rDNA, to obtain the figure of the total bacterial counts (for test and control group). This study represents a first phase of the research line on extrinsic tooth pigmentation on developmental age patients. Materials and methods. The selected sample is composed of 20 subjects aged between 2 and 15 years and in good general and oral health among the patients included in a dental examination trial at the Department…