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Your search keyword '"Ceccarelli, P. L."' showing total 92 results
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92 results on '"Ceccarelli, P. L."'

1. Infall of galaxies onto groups

Author

Santucho, M. V., Ceccarelli, M. L., and Lambas, D. G.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Growth of the structure in the Universe manifest as accretion flows of galaxies onto groups and clusters. Thus, the present day properties of groups and their member galaxies are influenced by the characteristics of this continuous infall pattern. Several works both theoretical, in numerical simulations, and in observations, study this process and provide useful steps for a better understanding of galaxy systems and their evolution. We aim at exploring the streaming flow of galaxies onto groups using observational peculiar velocity data. The effects of distance uncertainties are also analyzed as well as the relation between the infall pattern and group and environment properties.This work deals with analysis of peculiar velocity data and their projection on the direction to group centers, to determine the mean galaxy infall flow. We applied this analysis to the galaxies and groups extracted from the Cosmicflows-3 catalog. We also use mock catalogs derived from numerical simulations to explore the effects of distance uncertainties on the derivation of the galaxy velocity flow onto groups. We determine the infalling velocity field onto galaxy groups with cz < 0.033 using peculiar velocity data. We measure the mean infall velocity onto group samples of different mass range, and also explore the impact of the environment where the group reside. Well beyond the group virial radius, the surrounding large-scale galaxy overdensity may impose additional infalling streaming amplitudes in the range 200 to 400 km s$^{-1}$. Also, we find that groups in samples with a well controlled galaxy density environment show an increasing infalling velocity amplitude with group mass, consistent with the predictions of the linear model. These results from observational data are in excellent agreement with those derived from the mock catalogs., Comment: 11 pages, 11 figures. Accepted for publication in A&A

Published
2020
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2. Galaxy Peculiar Velocities and Infall onto Groups

Author

Ceccarelli, M. L., Valotto, C., Lambas, D. G., Padilla, N., Giovanelli, R., and Haynes, M.

Subjects
Astrophysics
Abstract

We perform statistical analyses to study the infall of galaxies onto groups and clusters in the nearby Universe. The study is based on the UZC and SSRS2 group catalogs and peculiar velocity samples. We find a clear signature of infall of galaxies onto groups over a wide range of scales 5 h^{-1} Mpc10^{13} M_{\odot} a larger infall is observed, V_{infall} \simeq 200 km s^{-1}. Similarly, we find that galaxies surrounding groups with L_{g}<10^{15} L_{\odot} have V_{infall} \simeq 100 km s^{-1}, whereas for L_{g}>10^{15} L_{\odot} groups, the amplitude of the galaxy infall can be as large as V_{infall} \simeq 250 km s^{-1}. The observational results are compared with the results obtained from mock group and galaxy samples constructed from numerical simulations, which include galaxy formation through semianalytical models. We obtain a general agreement between the results from the mock catalogs and the observations. The infall of galaxies onto groups is suitably reproduced in the simulations and, as in the observations, larger virial mass and luminosity groups exhibit the largest galaxy infall amplitudes. We derive estimates of the integrated mass overdensities associated with groups by applying linear theory to the infall velocities after correcting for the effects of distance uncertainties obtained using the mock catalogs. The resulting overdensities are consistent with a power law with \delta \sim 1 at r \sim 10 h^{-1}Mpc., Comment: 25 pages, 10 figures

Published
2005
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3. Diversity & Inclusion: Fitness for Work Through a Personalized Work Plan for Workers with Disabilities and Chronic Diseases According to ISO 30415/2021.

Author

CRISTAUDO, ALFONSO, GUGLIELMI, GIOVANNI, FODDIS, RUDY, CALDI, FABRIZIO, BUSELLI, RODOLFO, BRILLI, CINZIA, COGGIOLA, MAURIZIO, CECCARELLI, GIANLUCA L., and SAFFIOTI, GIUSEPPE

Abstract

The recent standard ISO 30415-2021 - Human resources management - Diversity and inclusion - was developed internationally within the technical committee ISO/TC 260 "Human resources management" (Working group WG 8 "Diversity and inclusion") and emphasizes the need for measures to create a work environment that is inclusive of diversity (e.g. in terms of health, gender, age, ethnicity, culture). Developing an inclusive work environment requires ongoing commitment and engagement from the entire organization regarding policies, processes, organizational practices, and individual behavior. As far as the role of occupational medicine is concerned, this direction can be supported by the correct management of disabled workers and workers with chronic pathologies that affect their fitness for duty. The "reasonable accommodation" is the way by which first the European Union and then the United Nations intended to support the inclusion of people with disabilities in the world of work. The Personalized Work Plan includes different approaches (organizational, technical, procedural) meant for modifying the work activity envisaged for the disabled worker or for any worker suffering from chronic diseases or dysfunctions. The adoption of the Personalized Work Plan implies the effort of redesigning the workstation, the work procedures, or even the planning of different micro and macro tasks etc., in order to prioritize the adaptation of the working environment to the worker, and to preserve the value of the worker's productivity according to the principle of reasonable accommodation. [ABSTRACT FROM AUTHOR]

Published
2023
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11. Ernia diaframmatica nell'ELBW: quando operare?

Author

Bussetti, Chiara, Salvini, Annamaria, Laguardia, M. C., Ceccarelli, P. L., Durante, V., Barozzi, G., Bastoni, S., Ferrari, Fabrizio, and Cacciari, Alfredo

Subjects
ELBW, ernia diaframmatica, ernia diaframmatica, ELBW
Published
2011

14. Nefrite lobare acuta

Author

Durante, V., Bianchini, M. A., Repetto, P., Biondini, D., Ceccarelli, P. L., and Cacciari, Alfredo

Subjects
parenchima renale, nefrite, parenchima renale, nefrite
Published
2011

17. Once-daily intrapleural urokinase treatment of complicated parapneumonic effusion in pediatric patients

Author

Bianchini, M. A., Ceccarelli, P. L., Repetto, P., Durante, V., Biondini, D., Barbara Maria Bergamini, and Cacciari, A.

Subjects
Male, pleural effusion, empyema, children, urokinase, fibrinolityc treatment, Urokinase-Type Plasminogen Activator, Pleural Effusion, Instillation, Drug, Child, Preschool, Humans, Female, Child, Tomography, X-Ray Computed, Ultrasonography
Abstract

In this paper, we describe our experience in the treatment of childhood empyema using urokinase. Patients' ages ranged from 2 to 12 years. Urokinase (dosage: 3,100 IU/kg/day) was diluted in normal saline to produce 1000 IU/ml (maximum dosage 100,000 IU in 100 ml of normal saline). After 2 hours, the clamped catheters were released and connected to water-seal suction at a negative pressure of 10 cm H2O. Pleural irrigations were continued once a day until thoracostomy tube output decreased to less than 10 ml/day (urokinase treatment mean duration: 11.5 days). The complete resolution of the chest effusion was assessed on chest ultrasound scan and radiographs. None of the patients experienced any side effects due to urokinase. It would now seem reasonable to advocate small chest tube thoracostomy and intrapleural urokinase as first-line treatment of pleural empyema in children, with surgery indicated as a secondary intervention.

Published
2010

19. Agenesia anale e trisomia 18

Author

Frassoldati, R., Baraldi, C., Gallo, C., Bianchini, A., Ferrari, Paola, Repetto, P., Ceccarelli, P. L., Cacciari, Alfredo, and Ferrari, Fabrizio

Subjects
agenesia anale, trisomia 18
Published
2010

23. Una causa infrequente di idronefrosi bilaterale

Author

Gavioli, Sara, Bussetti, Chiara, Gargano, G., Ceccarelli, P. L., Biondini, D., Durante, V., Roversi, S., Frappietri, E., Ferrari, Fabrizio, and Cacciari, Alfredo

Subjects
idronefrosi
Published
2008

24. Volvolo prenatale

Author

Fiorini, V., Rossi, K., Ceccarelli, P. L., Bianchini, M. A., Rivi, C., Bastoni, S., Bertoncelli, N., Di Pancrazio, L., Gallo, C., Cacciari, Alfredo, and Ferrari, Fabrizio

Subjects
volvolo prenatale
Published
2008

26. Teratoma sacrococcigeo congenito: due casi clinici

Author

Saccani, I., Pagano, R., Gargano, G., Gallo, C., Ceccarelli, P. L., Bianchini, A., Durante, V., Repetto, P., Nieddu, E., Ferrari, Fabrizio, and Cacciari, Alfredo

Subjects
teratoma sacrococcigeo
Published
2008

30. Ipercolesterolemia familiare omozigote

Author

Iughetti, Lorenzo, Appio, P., Vellani, G., Garetti, E., Cattani, S., Ceccarelli, P. L., and Predieri, Barbara

Subjects
CHOLESTEROL, LDL
Published
2007

37. [Neonatal cystic fibrosis: report of 2 cases]

Author

Della Casa Muttini, E., Pancaldi, M., Roversi, M. F., Pugliese, M., Mordini, B., Biagioni, O., Gargano, G., Ceccarelli, P. L., Cattani, S., Fabrizio Ferrari, and Cavazzuti, G. B.

Subjects
cystic fibrosis
Published
2000

48. Nuclear scattering of K+-mesons in the energy region of 80 MeV

Author

Biswas, N. N., Ceccarelli-Fabbrichesi, L., Ceccarelli, M., Gottstein, K., Varshneya, N. C., and Waloschek, P.

Abstract

The scattering of K+-mesons by nuclei of photoemulsion has been investigated in the 60 to 100 MeV region. Data on 27 collisions of K+-mesons with hydrogen nuclei, collected from various laboratories, are also presented. The angular distribution of the elastic scatterings is compared with curves calculated byCostaandPatergnanifor an optical model of the nucleus. The inelastic scattering data are, instead, compared with the results of a calculation performed with the Monte Carlo method, for a Fermi-gas nuclear model. Experimental evidences, such as the frequent occurrence of small angle elastic scatterings and the rarity of large energy losses, argue in favour of a repulsive nuclear potential acting on the K+-meson. The angular distribution of the K+-p collisions is then satisfactorily described assuming a predominants-wave scattering for energies lower than ∼ 50 MeV in the center of mass system. The data on the K+-nuclei inelastic scattering are shown instead to be well described, on the basis of the Fermi model, with the assumption that the K-nucleon cross-section is peaked backwards or is energy dependent. The influence of the two isotopic spin states which intervene in the K-nucleon scattering is discussed.

Published
1897
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