scholarly journals FIXED-ENERGY RESPONSE-FUNCTION ANALYSIS WITH MULTI-EFFICIENCY (FRAM) SOFTWARE, VERSION 6

2021 ◽  
Author(s):  
Kaelyn Badura
Keyword(s):  
Response Function ◽  
Function Analysis ◽  
Energy Response ◽  
Fixed Energy

Sensitivity with respect to observations in variational data assimilation

2017 ◽  
Vol 32 (1) ◽  
Author(s):  
Victor Shutyaev ◽  
Francois-Xavier Le Dimet ◽  
Elena Shubina
Keyword(s):  
Data Assimilation ◽  
Response Function ◽  
Nonlinear Evolution ◽  
Function Analysis ◽  
Optimal Solution ◽  
Coupled System ◽  
Variational Data Assimilation ◽  
Adjoint Equations ◽  
Observation Data ◽  
Standard Problem

AbstractThe problem of variational data assimilation for a nonlinear evolution model is formulated as an optimal control problem to find the initial condition function (analysis). The observation data, and hence the optimal solution, may contain uncertainties. A response function is considered as a functional of the optimal solution after assimilation. Based on the second-order adjoint techniques, the sensitivity of the response function to the observation data is studied. The gradient of the response function is related to the solution of a non-standard problem involving the coupled system of direct and adjoint equations. The solvability of the non-standard problem is studied, based on the Hessian of the original cost function. An algorithm to compute the gradient of the response function with respect to observations is developed and justified.

scholarly journals Spatial localization in nuclear spin-induced circular dichroism – a quadratic response function analysis

2019 ◽  
Vol 21 (33) ◽  
pp. 18082-18091 ◽  
Author(s):  
Petr Štěpánek ◽  
Sonia Coriani
Keyword(s):  
Circular Dichroism ◽  
Excited States ◽  
Response Function ◽  
Nuclear Spin ◽  
Function Analysis ◽  
Spatial Localization ◽  
Computational Method ◽  
Induced Circular Dichroism ◽  
Quadratic Response ◽  
Circular Dichroïsm

A new computational method for nuclear spin-induced circular dichroism allows analysis of localization of individual excited states within a molecule.

Response Function of Collimated Detector for Non Axial Detector-Source Geometry

2013 ◽  
Vol 772 ◽  
pp. 571-578
Author(s):  
Rahadi Wirawan ◽  
M. Djamal ◽  
A. Waris ◽  
Gunawan Handayani ◽  
Hong Joo Kim
Keyword(s):  
Monte Carlo ◽  
Response Function ◽  
Gamma Ray ◽  
Geant4 Simulation ◽  
Fundamental Parameter ◽  
Response Functions ◽  
Energy Response ◽  
Simulation Code ◽  
Source Geometry ◽  
Detector Axis

Response function is a fundamental parameter for all detectors in order to analyze the energy distribution of gamma ray which undergoes scattering interaction with the material. The response functions of a 3 in. x 3 in. NaI(Tl) collimated detector for non axis detector-source geometry has been calculated using a Monte Carlo approach from GEANT4 simulation code with 0.662 MeV of mono-energetic of photon gamma ray. Collimated Pb with 4 cm thickness and 2 cm of holes diameter were employed for shielding. The source was assumed as an isotropic point source and it is placed at various positions to the detector axis. The comparison between the measured energy response functions and the simulated energy response functions after normalization were also performed in order to validate the modeling results.

scholarly journals The human photopic ERG luminance-response function: Analysis, interpretation and application

2002 ◽  
Vol 2 (10) ◽  
pp. 86-86
Author(s):  
P. Lachapelle ◽  
M. Rufiange ◽  
J. Brule ◽  
J. Racine ◽  
M. Dumont ◽  
...  
Keyword(s):  
Response Function ◽  
Function Analysis ◽  
Photopic Erg
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