782 research outputs found
Synthesis of hyperbranched polyarylethenes by consecutive C–H vinylation reactions
No full text<p>Anastasia Yu. Gitlina, Albert Ruggi, Kay Severin*</p><p>Synthesis of hyperbranched polyarylethenes by consecutive C–H vinylation reactions</p><p><i>Polym. Chem</i>. <strong>2023</strong>, <i>14</i>, 4182-4187</p><p>The dataset contains the following raw data - NMR, HRMS, GPC, TGA, DLS, photophysical data (absorption, excitation, emission spectra, photoluminescence lifetimes and quantum yields).</p>
The reorganization of healthcare services from the perspective of appropriateness: The experience of the University Hospital "San Giovanni di Dio e Ruggi d'Aragona" in the management of Diagnosis-Related Group no. 127 - Heart failure and shock|La riorganizzazione delle prestazioni sanitarie in ottica di appropriatezza: L'esperienza dell'AOU “San Giovanni di Dio e Ruggi d'Aragona” nella gestione del DRG 127 - Insufficienza cardiaca e shock
No full textThe article proposes a care path intended to improve the standards of specialist care in the field of heart failure, in compliance with the criteria of effectiveness, efficiency and equity on which the Italian National Health Service (INHS) relies. A case study approach was undertaken. The attention was focused on the experience of the University Hospital “San Giovanni di Dio e Ruggi d'Aragona” located in Salerno, Southern Italy. In particular, data were collected from with the collaboration of the “Hospital Discharge Form” office. Examining a set of indicators - such as the average hospitalization and percentage of hospitalizations - about the Diagnosis-Related Group no. 127 “Heart failure and intensive cardiology shock” in the financial year 2017, we untangled the criticalities of the existing process and, adopting the Business Process Improvement (BPI) methodology, we proposed a process redesign. Technology, asset management, care paths, training, and monitoring were identified as the primary levers to enhance the standards of specialist care in the field of heart failure
Tunnel Configurations and Seismic Isolation Optimization in Underground Gravitational Wave Detectors
No full textThe Einstein Telescope will be a gravitational wave observatory comprising six nested detectors, three optimized to collect low-frequency signals, and three for high frequency. It will be built a few hundred meters under Earth’s surface to reduce direct seismic and Newtonian noise. A critical issue with the Einstein Telescope design are the three corner stations, each hosting at least one sensitive component of all six detectors in the same hall. Maintenance, commissioning, and upgrade activities on a detector will cause interruptions of the operation of the other five, in some cases for years, thus greatly reducing the Einstein Telescope observational duty cycle. This paper proposes a new topology that moves the recombination and input–output optics of the Michelson interferometers, the top stages of the seismic attenuation chains and noise-inducing equipment in separate excavations far from the tunnels where the test masses reside. This separation takes advantage of the shielding properties of the rock mass to allow continuing detection with most detectors even during maintenance and upgrade of others. This configuration drastically improves the observatory’s event detection efficiency. In addition, distributing the seismic attenuation chain components over multiple tunnel levels allows the use of effectively arbitrarily long seismic attenuation chains that relegate the seismic noise at frequencies farther from the present low-frequency noise budget, thus keeping the door open for future upgrades. Mechanical crowding around the test masses is eliminated allowing the use of smaller vacuum tanks and reduced cross section of excavations, which require less support measures
Temperature control for an intra-mirror etalon in interferometric gravitational wave detector fabry–perot cavities
No full textThe sensitivity of interferometric gravitational wave detectors is optimized, in part, by balanced finesse in the long Fabry–Perot arm cavities. The input test mass mirrors of Advanced Virgo feature parallel faces, which creates an etalon within the substrate, adding variability in the total mirror reflectivity, in order to correct imbalanced finesse due to manufacturing tolerances. Temperature variations in mirror substrate change the optical path length primarily through varying the index of refraction and are tuned to correct for a finesse imbalance of up to 2.8% by a full etalon fringe of 0.257 K. A negative feedback control system was designed to control the mirror temperature by using an electrical resistive heating belt actuator for a heat transfer process modeled as a two-pole plant. A zero controller filter was designed which achieves temperature control within 2.3% of the etalon fringe and recovers to within 10% of the working point within 32 hours after a step input of one etalon fringe. A preliminary unlock condition control designed to compensate when the interferometer unlocks shows that the control remains stable even after a drastic change in the plant due to the absence of the laser heating. Further improvements to the control must also consider the full heat transfer mechanisms by using modern control state space models
Tunnel configurations and seismic isolation optimization in underground gravitational wave detectors
No full textGravitational wave detectors like the Einstein Telescope will be built a few
hundred meters under Earth's surface to reduce both direct seismic and
Newtonian noise. Underground facilities must be designed to take full advantage
of the shielding properties of the rock mass to maximize the detector's
performance. A major issue with the Einstein Telescope design are the corner
points, where caverns need to be excavated in stable, low permeability rock to
host the sensitive measurement infrastructure. This paper proposes a new
topology that moves the top stages of the seismic attenuation chains and
Michelson beam re-combination in separate excavations far from the beam-line
and equipment induced noise while the test mass mirrors remain in the main
tunnels. Distributing the seismic attenuation chain components over multiple
tunnel levels allows the use of arbitrarily long seismic attenuation chains
that relegate the seismic noise at frequencies completely outside the
low-frequency noise budget, thus keeping the door open for future Newtonian
noise suppression methods. Separating the input-output and recombination optics
of different detectors into separate caverns drastically improves the
observatory detection efficiency and allows staged commissioning. The proposed
scheme eliminates structural and instrumentation crowding while the reduced
sizes of excavations require fewer support measures
Adaptive Optics of Kyrieleis Plaques in Varicella Zoster Virus-Associated Posterior Uveitis: A Multimodal Imaging Analysis
No full textKyrieleis plaques (KP) represent a peculiar type of vasculitis affecting retinal arterial branches in a beaded segmental pattern that can be found in several posterior inflammatory ocular conditions. The nature and precise location of KP is unclear. Adaptive Optics (AO) provides an in vivo visualization of retinal vasculature on a microscopic level, thus permitting a more detailed characterization of KP as compared to traditional imaging techniques. This study aims to report AO imaging of KP in Varicella Zoster virus (VZV)-associated posterior uveitis and to correlate the findings with traditional imaging techniques. Three patients diagnosed with VZV posterior uveitis underwent adaptive optics (AO) imaging and traditional multimodal imaging techniques, including fundus photography, fluorescein angiography, indocyanine green angiography and optical coherence tomography. In all subjects, AO imaging revealed segmental hyporeflectivity confined to the vessel wall, with no evidence of arterial wall disruption or extravascular involvement. In our series, AO findings support the view that KP are localized within the inner arterial wall, possibly at the endothelial level
Evaluation of glyoxal and methylglyoxal levels in uremic patients under peritoneal dialysis
No full textMagnetic coupling to the advanced Virgo payloads and its impact on the low frequency sensitivity
No full textWe study the electromagnetic coupling of the Advanced Virgo (AdV) input mirror payload in response to a slowly time-varying magnetic field. As the problem is not amenable to analytical solution, we employ and validate a finite element (FE) analysis approach. The FE model is built to represent as faithfully as possible the real object, and it has been validated by comparison with experimental measurements. The intent is to estimate the induced currents and the magnetic field in the neighbourhood of the payload. The procedure found 21 equivalent electrical configurations that are compatible with the measurements. These have been used to compute the magnetic noise contribution to the total AdV strain noise. At the current stage of development, AdV seems to be unaffected by magnetic noise, but we foresee a non-negligible coupling once AdV reaches the design sensitivity
Unknown artworks and further considerations regarding Paolo de Matteis, Giuseppe Simonelli, Lorenzo Ruggi and other followers of Luca Giordano
No full textCientos de pinturas napolitanas de los siglos XVII y XVIII han sido generalmente atribuidas a la escuela de Luca Giordano, quien tuvo un largo número de alumnos cuyos nombres han sido transmitidos por las principales fuentes de la historiografía artística. A algunos de ellos, como Franceschitto o Monsù Anselmo, no les podemos asociar ni siquiera con una obra. Por el contrario, hay casos de seguidores anónimos de Giordano con un estilo reconocible, como el autor de las dos versiones de Santiago el Mayor, una conservada en Casalnuovo de Nápoles y la otra en Lecce. Otras obras siguen fielmente el estilo de Giordano y llevan la firma de pintores que serían de otro modo desconocidos, caso de Lorenzo Ruggi, que firma una hermosa Inmaculada en la iglesia de S. Franciscode Aversa. Otro notable artista seguidor de Giordano es el «G. Fatteruso» que firma el Milagro de San Biagio en la iglesia de San Biagio en Mugnano de Nápoles. Es sin duda plausible la identificación con Giuseppe Fattorusso, recordado como discípulo de Vaccaro y luego de Beinaschi, si bien la comparación con sus obras documentadas plantea algunas dudas. Por último, una revisión de obras de diversa calidad, atribuidas con reserva a Luca Giordano o a su taller, puede arrojar una nueva luz sobre la cuestión de las numerosas imitaciones de las obras del maestro. La calificación de copias sería la más adecuada, por ejemplo, para las dos versiones de la Bendición de Isaac aparecidas en el mercado anticuario de Nueva York y en una colección privada en Sant’Arpino.Hundreds of 17th- and 18th-century Neapolitan paintings have been generically attributed to the school of Luca Giordano, who had many pupils, whose names have become known to us thanks to the leading historiographical sources of Neapolitan art. The work of some of these artists, such as Franceschitto and Monsu Anselmo, is unknown, although there are some anonymous Giordano followers who can easily be identified by their style, among them the author of two versions of St James the Greater, one of which is kept in Casalnuovo di Napoli and the other in Lecce. In addition, there are other works that are heavily influenced by Giordano and signed by hitherto unknown artists. These include Lorenzo Ruggi, who painted the wonderful Immaculate adorning St Francis Church in Aversa. Recent documentary research has revealed some information on the painter. Another leading follower of Giordano’s is one “G. Fatteruso”, who completed the majestic Miracle of St Blaise at St Blaise Church in Mugnano di Napoli. Though there are obvious grounds for identifying this artist as Giuseppe Fattorusso,remembered as a pupil of Vaccaro and later of Beinaschi, comparisons with the latter’s documentedworks suggest that this is not the case. Finally, newly conducted analysis of poorer-quality paintings that are cautiously attributed to Giordano or his studio, has enabled more detailed investigation into the problem regarding copies of Giordano’s famous works. Examples of this are two depictions of The Blessing of Isaac, one sold in New York and another in Sant’Arpino (near Naples), both of which can only be regarded as copies of a lost Giordano composition
Entreprises multinationales et constitutionnalisation du système mondial de pouvoirs privés
No full textInternational audienceÀ propos de l'ouvrage de J.-P. Robé, A. Lyon-Caen et S. Vernac (dir.), Multinationals and the constitutionalization of the world power system, Routledge, 2016, préf. de J.-G. Ruggi
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