Search

Your search keyword '"Rusciano, G."' showing total 159 results
Start Over Author "Rusciano, G."
159 results on '"Rusciano, G."'

2. Work and heat probability distribution of an optically driven Brownian particle: Theory and experiments

Author

Imparato, A., Peliti, L., Pesce, G., Rusciano, G., and Sasso, A.

Subjects
Condensed Matter - Statistical Mechanics, Condensed Matter - Soft Condensed Matter
Abstract

We analyze the equations governing the evolution of distributions of the work and the heat exchanged with the environment by a manipulated stochastic system, by means of a compact and general derivation. We obtain explicit solutions for these equations for the case of a dragged Brownian particle in a harmonic potential. We successfully compare the resulting predictions with the outcomes of experiments, consisting in dragging a micron-sized colloidal particle through water with a laser trap.

Published
2007
Full Text
View/download PDF

8. Enhancing Raman tweezers by phase-sensitive detection

Author

Rusciano, G., De Luca, A.C., Sasso, A., and Pesce, G.

Subjects
Raman spectroscopy -- Equipment and supplies, Chemistry, Analytic -- Research, Chemistry
Abstract

Raman spectroscopy has become a powerful tool for microscopic analysis of organic and biological materials. When combined with optical tweezers (Raman tweezers), it allows investigating single, selected micrometric particles in their natural environment, therefore, reducing unwanted interferences from the cover plate. A general problem affecting both Raman spectrometers and Raman tweezers systems is the background caused by the environment surrounding the sample under investigation. In this paper, we report on a novel method that allows acquiring Raman spectra of a single trapped particle (polystyrene microspheres) free from any background contribution. The method is based on the use of two collinear and copropagating laser beams: the first is devoted to trapping (trap laser), while the second one is used to excite the Raman transitions (pump laser). The trap laser moves the trapped particle periodically, by means of a galvomirror, back and forth across the pump laser. The back-scattered photons are analyzed by a spectrometer and detected by a photomultiplier; finally, the resulting signal is sent to a lock-in amplifier for phase-sensitive detection. The purpose of the present work is to give a detailed description of our method and to supply a systematic study concerning the formation of the Raman signal. We trap polystyrene beads and study the dependence of the Raman signal on several parameters, such as height from the coverslip surface, the bead size, the modulation amplitude, and the pump laser intensity. Our results establish a direct and practical approach for background suppression in the spectroscopic analysis of optical trapped microsized samples.

Published
2007

18. Thromboembolism in pregnancy: a new temporary caval filter

Author

FERRARO, Fausto, D'IGNAZIO N, MATARAZZO A, RUSCIANO G, IANNUZZI M, BELLUOMO ANELLO, Clara, Ferraro, Fausto, D'Ignazio, N, Matarazzo, A, Rusciano, G, Iannuzzi, M, and BELLUOMO ANELLO, Clara

Subjects
Adult, Venous Thrombosis, Vena Cava Filters, Pregnancy, Thromboembolism, Pregnancy Complications, Hematologic, Humans, Female, Pulmonary Embolism, Filtration
Abstract

BACKGROUND: Our aim was to check out the advantages of temporary caval filtration in pregnancy with a retrievable filter: Tempofilter (tCF). METHODS: During a period of 2 years we implanted tCF in four patients at the third pregnancy trimester with serious acute deep venous thrombosis (DVT) of the lower limbs for prophylaxis of pulmonary thromboembolic disease (TED) in the pre-partum, during Caesarian section (CS), and in the post-partum period. tCF has been placed percutaneously in local anaesthesia using the Seldinger technique and under image intensifier control. All procedures were performed in a polyvalent ICU. RESULTS: tCF positioning was always easy. No complications linked to the adopted technique occurred. No incidence of pulmonary embolism was reported (PE). The permanence period of tCF in situ was 14 to 29 days (mean+/-SD: 21+/-6). The CS always took place without complications either for the patient or for the foetus. CONCLUSIONS: The combined use of tCF and an anti-coagulating therapy resulted in an effective prophylaxis of TED for the pregnant woman without any interferences with CS and with no consequence as for permanent endovascular prosthesis for the young patient herself.

Published
2001

19. Alternative technique for subclavian vein cannulation

Author

FERRARO, Fausto, D'IGNAZIO N, MEGLIO M, MARRA M, RUSCIANO G, ODIERNA I, CAPASSO A, BELLUOMO ANELLO, Clara, Ferraro, Fausto, D'Ignazio, N, Meglio, M, Marra, M, Rusciano, G, Odierna, I, Capasso, A, and BELLUOMO ANELLO, Clara

Subjects
Adult, Aged, 80 and over, Male, Catheterization, Peripheral, Subclavian Artery, Humans, Pneumothorax, Female, Middle Aged, Subclavian Vein, Aged
Abstract

BACKGROUND: Subclavian vein catheterism, a commonly used methodology in ICU, is not devoid of complications, even some serious ones (Pneumothorax 0.5%). METHODS: The authors propose an alternative technique based on the use of an introducer needle bent on its own axis to form an arch with its concavity turned towards the Quincke point. On searching the blood vessel, once the subclavian plane has been reached, the needle advancement towards the jugular fosse happens by following the needle curvature. In this way the operator can keep the needle on a plane parallel to the cutaneous one, and all the complications due to involuntary exceeding of the costal plane are avoided. The response of this new technique in 110 patients (study group) is compared through a retrospective study, to 100 patients with whom the standard technique has been used (control group). RESULTS: The study group has presented a significant reduction both of total complications (p

Published
2001

20. VENTILATION DURING PERCUTANEOUS TRACHEOSTOMY

Author

LETTIERI A, FERRARO, Fausto, FITTIPALDI C, RUSCIANO G, DI COLANDREA S, LEONE R, BELLUOMO ANELLO, Clara, Lettieri, A, Ferraro, Fausto, Fittipaldi, C, Rusciano, G, DI COLANDREA, S, Leone, R, and BELLUOMO ANELLO, Clara

Published
2001

24. RUOLO DELLA FILTRAZIONE CAVALE NELL'EMBOLIA POLMONARE

Author

FERRARO, Fausto, DI COLANDREA S, MAIELLO F, RUSCIANO G, VITALE V, BELLUOMO ANELLO, Clara, Ferraro, Fausto, DI COLANDREA, S, Maiello, F, Rusciano, G, Vitale, V, and BELLUOMO ANELLO, Clara

Published
2000

36. L’Ernia inguinale e lo sportivo

Author

DONISI, MARIO, Rusciano G, Pigna F, Verrusio C, Mosella M., Donisi, Mario, Rusciano, G, Pigna, F, Verrusio, C, and Mosella, M.

Published
1997

39. A DFG spectrometer at 3 mm for high resolution molecular spectroscopy and trace gas detection

Author

D'Amico G., Pesce G., Rusciano G., and Sasso A.

Abstract

We report the realization and characterization of a spectrometer based on difference frequency generation using a periodically poled lithium niobate crystal. As signal and pump lasers we used a diode-pumped Nd-YAG laser (lambda = 1.064 mum) and an extended cavity semiconductor diode laser (lambda = 0.785 mum), respectively. The mid-infrared coherent radiation was produced at 3 pm with a maximum power of about 160 nW obtained with 340 mW of signal and only 3.4 mW of pump. That corresponds to an efficiency of 0.01%/W cm, which is in good agreement with other data available in literature. The generated radiation around 3 mum has allowed us to study fundamental absorption bands of molecules of great atmospheric and physical interest Such as water vapor and the hydroxyl free radical. In this work we report preliminary spectroscopic results concerning the v (1) 5(41) --> 6(52) H2O line at 2.968 mum. In particular. for this line we provide the first experimental estimation of self-, N-2- and O-2- broadening coefficients.

Published
2002

Catalog

Books, media, physical & digital resources
See catalog results