نتایج جستجو برای: long memory and leverage effects second
تعداد نتایج: 17208860 فیلتر نتایج به سال:
abstract: in the paper of black and scholes (1973) a closed form solution for the price of a european option is derived . as extension to the black and scholes model with constant volatility, option pricing model with time varying volatility have been suggested within the frame work of generalized autoregressive conditional heteroskedasticity (garch) . these processes can explain a number of em...
Introduction: The effects of stimulation and inhibition of muscarinic acetylcholine receptors in the dorsal hippocampus on spatial learning and memory in male NMRI mice after acute stress were investigated. Materials and Methods: Animals were divided into two subsets of stress and non-stress. Each subset consisted of: saline, atropine (a muscarinic acetylcholine receptor antagonist) (1, 5, and ...
electroconvulsive therapy (ect) is an efficient treatment for several neuropsychiatric disorders however a large number of patients develop memory impairment after ect. different studies both on animals and human suggest that vasopressin has positive effects on memory and improves cognitive functions. in this randomized, double-blind controlled clinical trial, 50 patients with psychiatric disor...
the present dissertation aims to investigate four-word lexical bundles in applied linguistics research articles by iranian and internationally-published writers. the aims of this study are two-fold: first of all, attempts have been made to create a comprehensive list of the most commonly used four-word lexical bundles categorized by their type and token frequency, their structural characteristi...
one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...
introduction: lower level of estrogen hormone is considered as an important factor for loss of learning and memory in postmenopausal women. although estrogen replacement therapy is used for compensation, but long-term usage of estrogen is associated with a higher risk of hormonedependent cancers. phytoestrogens, due to fewer side effects, have been proposed to prevent menopause-related cognitiv...
Introduction:The hippocampus is one for the major centers of learning and memory. Role of the opioid system has been investigated and on the other hand receptors related to this system such as mu-opioid receptors (MOR) are extended in the hippocampus. In this study the effect of Naloxone administration as a mu opioid receptor antagonist on passive avoidance memory in adult male rats was i...
Flash memory affects not only storage options but also query processing. In this paper, we analyze the use of flash memory for database query processing, including algorithms that combine flash memory and traditional disk drives. We first focus on flash-resident databases and present data structures and algorithms that leverage the fast random reads of flash to speed up selection, projection, a...
Despite substantial evidence that resources and outcomes are transmitted across generations, there has been limited inquiry into the extent to which anti-poverty programs actually disrupt the cycle of bad outcomes. We explore how the effects of the United States’ largest early childhood program transfer across generations. We leverage the geographic rollout of this federally funded, means-teste...
Introduction: Lead intoxication in children has been associated with neurodevelopment disabilities that may result in motor and cognitive impairment. The aim of the present study is to evaluate in long term effects of prenatal exposure to low-level Pb2+ on learning, memory and EEG. Materials & Methods: Rat pregnant were exposed to distilled water or 0.05, 0.1, 0.2 % of Pb-acetate in the dr...
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