Fine tuning breath‐hold‐based cerebrovascular reactivity analysis models
نویسندگان
چکیده
منابع مشابه
Fine Tuning in Supersymmetric Models
The solution to fine tuning is one of the principal motivations for Beyond the Standard Model (BSM) Studies. However constraints on new physics indicate that many of these BSM models are also fine tuned (although to a much lesser extent). To compare these BSM models it is essential that we have a reliable, quantitative measure of tuning. We review the measures of tuning used in the literature a...
متن کاملوازوموتور راکتیویتی مغز(Cerebrovascular Reactivity) در حاملگی نرمال و پره‌اکلامپسی
Background & Aim: Preeclampsia is the major cause of maternal and perinatal morbidity and mortality. Transcranial Doppler(TCD) as a noninvasive procedure is used to assess hemodynamic changes in middle cerebral artery(MCA). Knowing the influence of normal pregnancy and preeclampsia on brain hemodynamics is essential for proper management of anesthesia, labor and vasoactive drug usage in the...
متن کاملIterative analysis of cerebrovascular reactivity dynamic response by temporal decomposition
OBJECTIVE To improve quantitative cerebrovascular reactivity (CVR) measurements and CO 2 arrival times, we present an iterative analysis capable of decomposing different temporal components of the dynamic carbon dioxide- Blood Oxygen-Level Dependent (CO 2-BOLD) relationship. EXPERIMENTAL DESIGN Decomposition of the dynamic parameters included a redefinition of the voxel-wise CO 2 arrival time...
متن کاملFine tuning in One-Higgs and Two-Higgs Standard Models
The fine-tuning principles are examined to predict the top-quark and Higgs-boson masses. The modification of the Veltman condition based on the compensation of vacuum energies is developed. It is implemented in the Standard Model and in its minimal extension with two Higgs doublets. The top-quark and Higgs-boson couplings are fitted in the SM for the lowest ultraviolet scale where the fine-tuni...
متن کاملFine Tuning in Quintessence Models with Exponential Potentials
We explore regions of parameter space in a simple exponential model of the form V = V0 e −λ Q Mp that are allowed by observational constraints. We find that the level of fine tuning in these models is not different from more sophisticated models of dark energy. We study a transient regime where the parameter λ has to be less than √ 3 and the fixed point ΩQ = 1 has not been reached. All values o...
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ژورنال
عنوان ژورنال: Brain and Behavior
سال: 2016
ISSN: 2162-3279,2162-3279
DOI: 10.1002/brb3.426