Search results for "SIM"

PROPAGATING INTERFACES IN A TWO-LAYER BISTABLE NEURAL NETWORK

2006

The dynamics of propagating interfaces in a bistable neural network is investigated. We consider the network composed of two coupled 1D lattices and assume that they interact in a local spatial point (pin contact). The network unit is modeled by the FitzHugh–Nagumo-like system in a bistable oscillator mode. The interfaces describe the transition of the network units from the rest (unexcited) state to the excited state where each unit exhibits periodic sequences of excitation pulses or action potentials. We show how the localized inter-layer interaction provides an "excitatory" or "inhibitory" action to the oscillatory activity. In particular, we describe the interface propagation failure a…

Pinning of a kink in a nonlinear diffusive medium with a geometrical bifurcation: Theory and experiments

2004

International audience; We study the dynamics of a kink propagating in a Nagumo chain presenting a geometrical bifurcation. In the case of weak couplings, we define analytically and numerically the coupling conditions leading to the pinning of the kink at the bifurcation site. Moreover, real experiments using a nonlinear electrical lattice confirm the theoretical and numerical predictions.

Mukautetussa luokassa olevan oppilaan lukemis- ja kirjoittamisprosessien arviointi

1997

On optimization of simulation based design

2007

Explicit proton transfer in classical molecular dynamics simulations.

2014

We present Hydrogen Dynamics (HYDYN), a method that allows explicit proton transfer in classical force field molecular dynamics simulations at thermodynamic equilibrium. HYDYN reproduces the characteristic properties of the excess proton in water, from the special pair dance, to the continuous fluctuation between the limiting Eigen and Zundel complexes, and the water reorientation beyond the first solvation layer. Advantages of HYDYN with respect to existing methods are computational efficiency, microscopic reversibility, and easy parameterization for any force field peerReviewed

Measurements of Low-Energy Protons using a Silicon Detector for Application to SEE Testing

2021

A silicon detector with a fast electronics chain is used for the dosimetry of protons in the range 0.5-5 MeV at the Centro Nacional de Aceleradores (CNA) 3 MV Tandem laboratory in Seville, Spain. In this configuration, measurements can be performed in pulsed mode, using a digitizer to record event-by-event proton energy depositions. The distributions of deposited energy were obtained thanks to a calibration with an alpha source. Measurements of flux and deposited energy are used to enable single event effect (SEE) testing on selected static random access memories (SRAMs).

Scheduling under the network of temporo-spatial proximity relationships

2017

We discuss and introduce to the schedulingeld a novel, qualitative optimization model - scheduling under the network of temporo-spatial proximity relationships.We introduce a half perimeter proximity measure as an objective of scheduling.We present and evaluate an incremental Sequence Pair neighborhood evaluation algorithm, applicable to both scheduling and rectangle packing problems in VLSI industry. In this paper, we discuss and introduce to the scheduling field a novel optimization objective - half perimeter proximity measure in scheduling under the network of temporo-spatial proximity relationships. The presented approach enables to qualitatively express various reasons of scheduling ce…

VIOLENZA DI PROSSIMITÀ. CURA PASTORALE E VULNERABILITÀ SOCIALE

2022

I capitoli che compongono questo volume si riconoscono nella comune origine di un progetto di ricerca – il PROVIDE – che ha fornito una messe di riflessioni generatrici di un dibattito ancora pulsante. Nascono da un approccio teorico che la curatrice ha formulato già nel 2013, con la pubblicazione del volume Violenza di prossimità, eche nelle ricerche condotte nell’ambito progetto sopracitato hanno trovato la possibilità di una verifica in progress. Voci di altissimo rilievo scientifico - Franca Bimbi, Consuelo Corradi, Marina Calloni,Ravinde Barn, Paolo Zurla - si confrontano sul tema ampliando il dibattito. Con loro interloquiscono altr* studios* - Roberta T. Di Rosa, Lia Lombardi, Gaetan…

Latvijas simtgade kā valsts tēla veidošanas līdzeklis

2019

Maģistra darbā “Latvijas simtgade kā valsts tēla veidošanas līdzeklis” tiek pētīts jautājums, vai un kā Latvijas simtgades publiskās diplomātijas pasākumu kopums ietekmē Latvijas tēla veidošanos. Pēc veikto pētījumu par Latvijas tēlu izpētes, tika secināts, ka trūkst pētījumu un tajos padziļinātas izpratnes par valsts tēla un zīmola veidošanu un abu terminu būtiskajām atšķirībām, kā arī zīmolvedības koncepta nozīmi attiecībā pret valsts tēla veidošanu. Līdz ar to nav bijis pētījumu par valstiski nozīmīgu pasākumu kopuma – publiskās diplomātijas – ietekmi uz valsts tēlu. Latvija oficiāli neveic mediju monitoringu ārzemēs un neizvērtē, kā konkrēts notikumu kopums ietekmē valsts tēlu, tāpēc ir…

Applicability of pulse shape analysis methods in measurements of low energy gamma rays from human lungs

2015

Pulssimuoto-analyysi menetelmiä sovellettiin gammaspektrometrisiin mittauksiin, tavoitteena vähentää matala-energistä Compton taustaa spektrissä. Tarkasteltu käytännön sovellus oli sisäänhengitetyn plutoniumin havaitseminen suorissa keuhkomittauksissa. Vuorovaikutussyvyyden ja pulssin nousuajan välillä ei löydetty mittauksissa yhteyttä. Mittauksissa käytetyssä plutonium-239 keuhkot sisältävässä phantomissa oli ei-toivottu americium-241 kontaminaatio. Työssä keskustellaan myös mittarisuunnittelun keinoista, joilla pulssimuotoanalyysin tehokkuutta voitaisiin parantaa. Pulse shape analysis methods were applied to gamma spectroscopy measurements in an attempt to reduce the contribution from low…