Search results for "CKS"
showing 10 items of 611 documents
Continous alert for rickettsiosis in Sicily: molecular characterization of Rickettsia sp. obtained from ticks and human beings (1986-2001).
2006
Several strains of Rickettsia sp. were isolated from patients in western Sicily with MSF (Mediterranean Spotted Fever) as well as ticks. Strains isolated were examined by PCR and identified as belonging to R. conorii sp. Importantly a strain of Israeli Spotted Fever Rickettsiae, obtained from a tick, was also identified. Our data prove that strains other than the classical R. conorii also circulate in Sicily.
Nanorod orientation control by swift heavy ion irradiation
2022
Highly energetic ions have been previously used to modify the shape of metal nanoparticles embedded in an insulating matrix. In this work, we demonstrate that under suitable conditions, energetic ions can be used not only for shape modification but also for manipulation of nanorod orientation. This observation is made by imaging the same nanorod before and after swift heavy ion irradiation using a transmission electron microscope. Atomistic simulations reveal a complex mechanism of nanorod re-orientation by an incremental change in its shape from a rod to a spheroid and further back into a rod aligned with the beam. Highly energetic ions have been previously used to modify the shape of meta…
Etude numérique d'équations aux dérivées partielles non linéaires et dispersives
2011
Numerical analysis becomes a powerful resource in the study of partial differential equations (PDEs), allowing to illustrate existing theorems and find conjectures. By using sophisticated methods, questions which seem inaccessible before, like rapid oscillations or blow-up of solutions can be addressed in an approached way. Rapid oscillations in solutions are observed in dispersive PDEs without dissipation where solutions of the corresponding PDEs without dispersion present shocks. To solve numerically these oscillations, the use of efficient methods without using artificial numerical dissipation is necessary, in particular in the study of PDEs in some dimensions, done in this work. As stud…
Volatile dilution during magma injections and implications for volcano explosivity
2016
Magma reservoirs underneath volcanoes grow through episodic emplacement of magma batches. These pulsed magma injections can substantially alter the physical state of the resident magma by changing its temperature, pressure, composition, and volatile content. Here we examine plagioclase phenocrysts in pumice from the 2014 Plinian eruption of Kelud (Indonesia) that record the progressive capture of small melt inclusions within concentric growth zones during crystallization inside a magma reservoir. High-spatial-resolution Raman spectroscopic measurements reveal the concentration of dissolved H2O within the melt inclusions, and provide insights into melt-volatile behavior at the single crystal…
Brevi osservazioni su rule of law e sviluppi della teoria di Albert Venn Dicey
2016
Questa breve ricerca si propone di individuare i fattori di stabilità del sistema giuridico inglese, anche quando esso è stato chiamato a governare le più complesse situazioni potenzialmente destrutturanti, giovandosi dell’insegnamento scientifico e morale tramandato da due titolari della prestigiosa cattedra intitolata a Charles Viner presso l’Università di Oxford, William Blackstone (che l’inaugurò nel 1758, tenendola fino al 1766) ed Albert Venn Dicey (vissuto tra il 1835 ed il 1922), che gli succedette nel 1882, per restare in carica fino al 1909. In particolare, lo studio ha ad oggetto l’individuazione, nel vasto e ricco universo scientifico dai due autori tramandato alla conoscenza cr…
On critical behaviour in generalized Kadomtsev-Petviashvili equations
2016
International audience; An asymptotic description of the formation of dispersive shock waves in solutions to the generalized Kadomtsev–Petviashvili (KP) equation is conjectured. The asymptotic description based on a multiscales expansion is given in terms of a special solution to an ordinary differential equation of the Painlevé I hierarchy. Several examples are discussed numerically to provide strong evidence for the validity of the conjecture. The numerical study of the long time behaviour of these examples indicates persistence of dispersive shock waves in solutions to the (subcritical) KP equations, while in the supercritical KP equations a blow-up occurs after the formation of the disp…
Crystal Growth of HgSe by the Cold Travelling Heater Method
2002
We report on the low-temperature synthesis and growth of HgSe crystals making use of the cold travelling heater method. Ingots so obtained are analyzed by means of scanning microscopy, including EDAX and backscattered electron modes, and X-ray diffraction techniques.
H-bonding schemes of di- and tri-p-benzamides assessed by a combination of electron diffraction, X-ray powder diffraction and solid-state NMR
2010
The crystal structures of di- and tri-p-benzamides are solved by a combination of single crystal, electron and powder X-ray diffraction. Different hydrogen-bonding schemes observed in the two structures are described and classified. The hydrogen-bonding networks are correlated to complementary data obtained from multinuclear solid-state NMR.
Using Electron Diffraction to Solve the Crystal Structure of a Laked Azo Pigment
2009
The structure of the ζ phase of Pigment Red 53:2 was solved using electron diffraction data. The unit cell determination appeared to be more complicated due to twinning of the crystals. A series of...
Laser-Generated Acoustic Signal Interaction with Surface Flaws on Rail Wheels
2005
Long- and short-range acoustic-signal interaction with surface-breaking cracks and geometric boundaries of the rail-wheel tread area are presented in this article. Ultrasonic signals are generated using a laser-line source of varying length and distance from a crack and are detected with a 1-MHz contact transducer to map the sound field behind the crack in the near, intermediate, and far fields of the insonified region. The factors that affect the behavior of a laser-generated surface acoustic wave propagating along the tread area of a rail wheel are discussed. A signal normalization method is proposed to help in sensing the presence of a crack from the transmitted signal unaffected by the …