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RISS 인기검색어
- 검색키워드
- 저자 : Gaudino, D. (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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De Rosa, S.,Franco, F.,Gaudino, D. Techno-Press 2012 Wind and Structures, An International Journal (WAS Vol.15 No.3
Some numerical investigations are presented concerning the response of a given plate under turbulence driven excitations. Three different input loads are simulated according to the wall pressure distributions derived from the models proposed by Corcos, Efimtsov and Chase, respectively. Modal solutions (finite element based) are used for building the modal stochastic responses in the sub-critical aerodynamic frequency range. The parametric investigations concern two different values of the structural damping and three values of the boundary layer thickness. A final comparison with available experimental data is also discussed. The results demonstrate that the selection of the adequate TBL input model is still the most critical step in order to get a good prediction.
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S. De Rosa,F. Franco,D. Gaudino 한국풍공학회 2012 Wind and Structures, An International Journal (WAS Vol.15 No.3
Some numerical investigations are presented concerning the response of a given plate under turbulence driven excitations. Three different input loads are simulated according to the wall pressure distributions derived from the models proposed by Corcos, Efimtsov and Chase, respectively. Modal solutions (finite element based) are used for building the modal stochastic responses in the sub-critical aerodynamic frequency range. The parametric investigations concern two different values of the structural damping and three values of the boundary layer thickness. A final comparison with available experimental data is also discussed. The results demonstrate that the selection of the adequate TBL input model is still the most critical step in order to get a good prediction.
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Chi Zhang,Mathias Reufer,Danila Gaudino,Frank Scheffold 한국유변학회 2017 Korea-Australia rheology journal Vol.29 No.4
Diffusing wave spectroscopy (DWS) can be employed as an optical rheology tool with numerous applications for studying the structure, dynamics and linear viscoelastic properties of complex fluids, foams, glasses and gels. To carry out DWS measurements, one first needs to quantify the static optical properties of the sample under investigation, i.e. the transport mean free path l* and the absorption length la. In the absence of absorption this can be done by comparing the diffuse optical transmission to a calibration sample whose l* is known. Performing this comparison however is cumbersome, time consuming, and prone to mistakes by the operator. Moreover, already weak absorption can lead to significant errors. In this paper, we demonstrate the implementation of an automatized approach, based on which the DWS measurement procedure can be simplified significantly. By comparison with a comprehensive set of calibration measurements we cover the entire parameter space relating measured count rates (CRt , CRb) to (l*, la). Based on this approach we can determine l* and la of an unknown sample accurately thus making the additional measurement of a calibration sample obsolete. We illustrate the use of this approach by monitoring the coarsening of a commercially available shaving foam with DWS.
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Images from 18F-DOPA Scan in Congenital Hyperinsulinism: Not Always a Clue for Diagnosis
Evelina Maines,Luca Giacomello,Mirko D’Onofrio,Matteo Salgarello,Rossella Gaudino,Laura Baggio,Andrea Bordugo 대한핵의학회 2017 핵의학 분자영상 Vol.51 No.4
Congenital hyperinsulinism (CHI) is the most common cause of persistent hypoglycaemia in childhood (Horm Res 70:65-72, 2008; J Clin Endocr Metab 93:869- 875, 2008). 18−Fluoro-L-dihydroxy-phenylalanine (18FDOPA) positron emission tomography (PET) can detect areas of increased activity in the pancreas and may differentiate focal from diffuse CHI (J Clin Endocr Metab 93:869-875, 2008; Radiology 253:216-222, 2009). We here report the case of a girl who complained of recurrent episodes of severe hypoglycaemia despite previous partial pancreatectomy. To evaluate the need for additional surgical intervention, we performed 18F-DOPA PET/ computed tomography (CT), which showed a focal lesion corresponding to the anatomical region of the pancreatic tail. On the other hand, abdominal magnetic resonance imaging (MRI) clearly demonstrated that the 18F-DOPA uptake was in a loop of bowel occupying the previous surgical bed. Our case highlights that bowel uptake can be a possible pitfall in the interpretation of 18F-DOPA PET/CT in children affected by CHI, suggesting that when 18F-DOPA PET/CT results do not fit the clinical picture, magnetic resonance imaging (MRI) may allow a more accurate correlation of the radiotracer activity with the underlying anatomical or pathological structure.
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