318 research outputs found
Stability of a functional equation deriving from cubic and quartic functions
In this paper, we obtain the general solution and the generalized Ulam-Hyers
stability of the cubic and quartic functional equation
&4(f(3x+y)+f(3x-y))=-12(f(x+y)+f(x-y))
&+12(f(2x+y)+f(2x-y))-8f(y)-192f(x)+f(2y)+30f(2x)
On the Mazur--Ulam theorem in fuzzy n--normed strictly convex spaces
In this paper, we generalize the Mazur--Ulam theorem in the fuzzy real
n-normed strictly convex spaces.Comment: 7 page
Lorentzian Wormholes in the Friedman-Robertson-Walker Universe
The metric of some Lorentzian wormholes in the background of the FRW universe
is obtained. It is shown that for a de Sitter space-time the new solution is
supported by Phantom Energy. The wave equation for a scalar field in such
backgrounds is separable. The form of the potential for the Schr\"{o}dinger
type one dimensional wave equation is found.Comment: 7 page
Static balance function in children with a history of preterm birth
Background: The incomplete maturation of brain in preterm children results in long-term neurodevelopmental impairment. This study aimed to investigate the static balance function in children with a history of preterm birth. Methods: Participants were 31 preterm children including 21 moderately preterm (MPT), 10 very preterm (VPT), and 20 term children aged 5.5 and 6.5 years. The cervical vestibular-evoked myogenic potential (cVEMP) test and four static balance subscales of BOT-2 were performed. Results: The VPT children showed a significant increase in P1 and N1 wave latencies in cVEMP test compared to those in the term children (p= 0.041). Mean scores in the four static balance subscales of BOT-2 were significantly lower in the preterm children compared to those in the term children (p= 0.025). The P1 wave latency (p= 0.003) and mean score of standing on a balance beam with open eyes (p= 0.039) were significantly lower in the VPT children compared to those in the MPT children. A significant correlation was observed between the mean score in exercise 4 (standing on one leg on a balance beam with closed eyes) of static balance subscales of BOT-2 and P1 (r= -0.267, p= 0.036) and N1 (r= -0.304, p= 0.016) wave latencies of cVEMP. Conclusion: The longer latency of cVEMP waves along with a poor performance of children with a history of preterm birth suggests a possible defect in central vestibular pathway
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