68 research outputs found
The role of stakeholders and product architecture on the effectiveness of Proof-of-Concept programs
No full textPrevious literature has recognized the importance of building new relationships with the external ecosystem to improve the Technology Readiness Level (TRL) of Research Based Invention (RBIs). This is particularly important for those RBIs participating to Proof-of-Concept programs. However, previous literature has overlooked to provide information on which are the best characteristics of such stakeholders to foster the TRL advancement in a PoC context. This study aims to fill this gap by employing a quantitative analysis on a sample of 101 RBIs participating in seven PoC programs launched in Italy from 2016 to 2021.
Our results suggest that the effectiveness of PoCs is influenced by the stakeholder relationships created by the team during the program, and not by those existing prior to PoC. Moreover, to obtain an advancement of the TRL, relationships with stakeholders who possess certain characteristics (e.g. medium-sized stakeholders operating in different industries other than those initially known) are needed. However, such characteristics are highly idiosyncratic to the type of product architecture underlying the RBI. The study provides implications for both policy and decision-makers, within universities and other public and private entities, interested in PoCs design improvement
Balanced source terms for wave generation within the Hasselmann equation
No full textThe new Zakharov–Resio–Pushkarev (ZRP) wind input source term Zakharov et al.(2012) is examined for its
theoretical consistency via numerical simulation of the Hasselmann
equation. The results are compared to field experimental data,
collected at different sites around the world, and theoretical
predictions based on self-similarity analysis. Consistent results are
obtained for both limited fetch and duration limited statements
Il giuoco della città cruciverba
No full textPremessa al numero speciale della rivista "Sinestesie" (vol. 33) dedicato a Edoardo Sanguinet
Edoardo Sanguineti nella città cruciverba
No full textAtti dei convegni dedicati a Edoardo Sanguinet
Soliton turbulence in shallow water ocean surface waves
No full text: We analyze shallow water wind waves in Currituck Sound, North Carolina and experimentally confirm, for the first time, the presence of soliton turbulence in ocean waves. Soliton turbulence is an exotic form of nonlinear wave motion where low frequency energy may also be viewed as a dense soliton gas, described theoretically by the soliton limit of the Korteweg-deVries equation, a completely integrable soliton system: Hence the phrase "soliton turbulence" is synonymous with "integrable soliton turbulence." For periodic-quasiperiodic boundary conditions the ergodic solutions of Korteweg-deVries are exactly solvable by finite gap theory (FGT), the basis of our data analysis. We find that large amplitude measured wave trains near the energetic peak of a storm have low frequency power spectra that behave as ∼ω-1. We use the linear Fourier transform to estimate this power law from the power spectrum and to filter densely packed soliton wave trains from the data. We apply FGT to determine the soliton spectrum and find that the low frequency ∼ω-1 region is soliton dominated. The solitons have random FGT phases, a soliton random phase approximation, which supports our interpretation of the data as soliton turbulence. From the probability density of the solitons we are able to demonstrate that the solitons are dense in time and highly non-Gaussian
The Response of Waves to Changes in Wind Speed
No full textDetailed studies have been carried out for fetch and duration limited wave growth and fully developed sea state, but much less is known about changing wind conditions. The subject of this study is the response of waves to a change in wind speed. The main point of interest is the rate of response at the different frequencies. Two third generation wave prediction models were used, WAVEWATCH (Tol man , 1991) and the model of Resio and Perrie (1991). In third generation models all relevant processes of generation and dissipation of energy are represented explicitly by the three source terms: input of energy from the wind, nonlinear interactions between spectral components and dissipation of wave energy by various mechanisms. The main difference between the two used models is the way they calculate the nonlinear interactions. The operational model WAVEWATCH uses an approximation; the academic model of Resio and Perrie gives a full solution of the nonlinear souree term. To reduce the computation time required to calculate all wave-wave interactions, this model is restricted to either duration or fetch limited wave growth in deep water. With the model of Resio and Perrie a series of calculations was performed for sudden increases and decreases in wind speed. A simple equation which describes the model behaviour was formulated. An important coefficient of this equation is the adjustment rate immediately after the change in wind speed. Another meaningful parameter of the model behaviour is the time needed to reach a new equilibrium. Both parameters show that the rate of response increases with increasing frequency. The adjustment to a new equilibrium is faster for larger increases in wind speed, but slower for larger decreases. Field measurements of wind speed, direction and wave height were carried out on Lake George near Canberra (Australia). Analysis of the wind data resulted in five cases with a clear change in wind speed and a sufficiently constant wind direction. These cases were analysed with Fast Fourier Transforms. The measurements were compared with the results of WAVEW ATCH and the model of Resio and Perrie. The measurements were do ne in a water depth of about 2 meters; transitional water depth for the considered situations. Because in the model of Resio and Perrie bottom influence cannot be taken into account, the comparison with the measurements is only meaningful in situations with relatively short waves, which are not influenced by the limited depth of the lake. In these situations the results are reasonable. The results of WAVEWATCH do not agree very well with the measurements, e.g. the significant wave heights are too small. The parameterizations of the source terms need to be adjusted to the circumstances at the lake. The bottom roughness is probably much smaller than the 'standard' roughness for oceans.Hydraulic EngineeringCivil Engineering and Geoscience
Dieci inedite schede dantesche di Edoardo Sanguineti: prime ricognizioni nel Fondo Eredi della Wunderkammer
No full textNei primi mesi del 2021 il Centro Studi Interuniversitario Edoardo Sanguineti ha acquisito nuovi documenti provenienti dallo studio del poeta Edoardo Sanguineti e raccolti nel Fondo Eredi Sanguineti: tra le numerose risorse, figurano dieci schede dattiloscritte simili a quelle destinate alle opere UTET; simili, ma probabilmente finalizzate ad altri usi, visto che il focus non è sui lemmi, ma sui versi danteschi citati nelle Rime di Sacchetti e nelle Prediche sopra l’esito di Savonarola, due delle fonti utilizzate nelle ricerche lessicografiche.In the early months of 2021 Inter-University Study Center Edoardo Sanguineti got new archival resources from Edoardo Sanguineti’s studio, then collected in the Eredi Sanguineti fund. In the collection of papers, ten typescript tiles stand out, similar to those intended for UTET dictionaries, but probably meant for other destination: indeed, in the ten unpublished tiles the author focused on Dante’s verses honored in Franco Sacchetti’s and Girolamo Savonarola’s works
5th International workshop on wave hindcasting and forecasting, Melbourne, Florida, 1998
No full textInternational conference January 26-30, 1998
6th International workshop on wave hindcasting and forecasting, November 6-10, 2000, Monterey, California, USA
No full textpreprints of all full papers of the workshop of wave hindcasting and forecasting, Monterey, Californi
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