Search results for " Direct"
showing 10 items of 943 documents
A fast Fourier transform based direct solver for the Helmholtz problem
2018
This article is devoted to the efficient numerical solution of the Helmholtz equation in a two‐ or three‐dimensional (2D or 3D) rectangular domain with an absorbing boundary condition (ABC). The Helmholtz problem is discretized by standard bilinear and trilinear finite elements on an orthogonal mesh yielding a separable system of linear equations. The main key to high performance is to employ the fast Fourier transform (FFT) within a fast direct solver to solve the large separable systems. The computational complexity of the proposed FFT‐based direct solver is O(N log N) operations. Numerical results for both 2D and 3D problems are presented confirming the efficiency of the method discussed…
Brassica macrocarpa Guss., Cytisus aeolicus Guss., Elatine gussonei (Sommier) Brullo, Lanfr., Pavone & Ronsisv., Muscari gussonei (Parl.) Nyman, Ophr…
2016
Schede per il monitoraggio delle specie Brassica macrocarpa Guss., Cytisus aeolicus Guss., Elatine gussonei (Sommier) Brullo, Lanfr., Pavone & Ronsisv., Muscari gussonei (Parl.) Nyman, Ophrys lunulata Parl., Petagnia saniculifolia Guss., Silene hicesiae Brullo & Signor. all'interno del Manuale per il monitoraggio di specie ed habitat di interesse comunitario secondo la Direttiva 92/43/CEE in Italia.
Carex panormitana Guss., Leontodon siculus (Guss.) Nyman
2016
Schede per il monitoraggio delle specie Carex panormitana Guss. e Leontodon siculus (Guss.) Nyman all'interno del Manuale per il monitoraggio di specie ed habitat di interesse comunitario secondo la Direttiva 92/43/CEE in Italia.
Ārvalstu tiešo investīciju ietekmējošie faktori Latvijā
2015
Bakalaura darba „Ārvalstu tiešo investīciju ietekmējošie faktori Latvijā” galvenais mērķis ir izpētīt ienākošo ārvalstu tiešo investīciju ietekmējošos faktorus Latvijā. Balstoties uz zinātniskajiem pētījumiem, tiek noskaidroti iespējamie faktori, kas ietekmē ĀTI. Viena no darbā izmantotajām metodēm ir MKM daudzfaktoru regresijas analīze. Šajā analīzē tiek izmantoti ceturkšņu dati un aplūkotais periods ir no 2001. gada līdz 2014. gadam. Tiek noskaidrots, ka tirgus lielums, tirgus atvērtība un iegūldījumu atdeve pozitīvi ietekmē ienākošās ĀTI plūsmas Latvijā, kamēr tādi faktori kā inflācija, darbaspēka izmaksas, valūtas vērtība un ĀTI novēlotās vērtības netiek novērtēti kā statistiski nozīmīg…
AN ANALYSIS ON THE FDI FLOWS FROM EMERGING ECONOMIES TO EUROPE AND THEIR IMPACT
2014
After a concise setting of the context (by emphasizing on the FDI flows dynamics at the beginning of the 21st century through the lens of: annual inward and outward FDI flows between 2001 and 2013; annual contribution to IFDI flows and, respectively, to OFDI flows by group of countries – developed versus developing and transition ones), the paper analyzes the emerging market economies and the dynamics of their FDI flows (by using contextualization and comparisons). The main aspects targeted are: the dynamics of the outward FDI flows from EMEs comparative to the dynamics of the global outward FDI flows on annual basis, and the evolution of the specific weight of OFDI flows from EMEs in globa…
Autorità amministrative indipendenti e istituzioni politiche: questioni problematiche
2019
Le Autorità indipendenti rappresentano un modello di regolazione estraneo alla tradizione giuridica italiana, e, per questo, la loro collocazione ordinamentale ha suscitato, e continua a suscitare, dubbi e incertezze, riproponendo questioni fondamentali che appaiono tutt’altro che sopite. Inoltre, le dinamiche connesse al funzionamento delle Autorità indipendenti hanno evidenziato una notevole capacità evolutiva, per cui il loro ruolo ha conosciuto importanti mutamenti, assumendo caratteristiche diverse rispetto al funzionamento della forma di governo, e comportando nuovi assetti nelle relazioni con gli organi della legislazione, oltre che con gli organi della giurisdizione. Autonomia funzi…
Ārvalstu tiešo investīciju piesaiste Uzbekistānai
2018
Bakalaura darba tēma ir Ārvalstu tiešo investīciju piesaiste Uzbekistānā. Bakalaura darba mērķis ir sistematizēt teorētiskos uzskatus un praktiskos pasākumus ārvalstu tiešo investīciju piesaistīšanai un identificēt investīcijām labvēlīgu vidi vietējā tautsaimniecībā ekonomiskās modernizācijas ietvaros. Darba pirmā, teorētiskā, daļa satur izpēti, pamatojoties uz ārvalstu tiešo investīciju piesaisti un stimulus ārvalstu tiešo investīciju piesaistei. Darba otrajā daļā tiek definētas ārvalstu tiešās investīcijas Uzbekistānā, galvenokārt no Uzbekistānas Republikas tiesību regulējuma par ārvalstu investīciju atvieglojumiem, kas paredzēti ārvalstu investoriem Uzbekistānā un ārvalstu tiešo investīc…
Cathodal occipital tDCS is unable to modulate the sound induced flash illusion in migraine
2019
Migraine is a highly disabling disease characterized by recurrent pain. Despite an intensive effort, mechanisms of migraine pathophysiology still represent an unsolved issue. Evidence from both animal and human studies suggests that migraine is characterized by hyperresponsivity or hyperexcitability of sensory cortices, especially the visual cortex. This phenomenon, in turn, may affect multisensory processing. Indeed, migraineurs present with an abnormal, reduced, perception of the Sound-induced Flash Illusion (SiFI), a crossmodal illusion that relies on optimal integration of visual and auditory stimuli by the occipital visual cortex. Decreasing visual cortical excitability with transcrani…
Contrast sensitivity perimetry tests along the cardinal directions in color space: Correlation with the properties of the neural mechanisms mediating…
2014
It is well-known the advantages of measuring chromatic and achromatic contrast sensitivity for detecting pathologies. But these measurements are rarely used in clinical practice, due the complexity of the measurements and the examinator specialization. In fact, there is not a complete characterization of the response of the visual pathways to achromatic and chromatic spatio-temporal frequency stimuli. We have designed a new experimental device that facilitates these measurements and allow us to characterize the visual response in healthy patients. In this paper, we evaluated the responses of the visual pathways in healthy patients.
Inverting the Wollaston Illusion: Gaze Direction Attracts Perceived Head Orientation
2021
In the early 19th century, William H. Wollaston impressed the Royal Society of London with engravings of portraits. He manipulated facial features, such as the nose, and thereby dramatically changed the perceived gaze direction, although the eye region with iris and eye socket had remained unaltered. This Wollaston illusion can be thought of as head orientation attracting perceived gaze direction when the eye region is unchanged. In naturalistic viewing, the eye region changes with head orientation and typically produces a repulsion effect. Here we explore if there is a flip side to the illusion. Does the gaze direction also alter the perceived direction of the head? We used copies of the o…