Stochastic behavior of stock returns is very important for investors and policy makers in the stock market. In this paper, the stochastic behavior of the return index of Tehran Stock Exchange (TEDPIX) is examined using unobserved component Markov switching model (UC-MS) for the 3/27/2010 until 8/3/2015 period. In this model, stock returns are decomposed into two components; a permanent componen...

This paper presents a new method to find the optimum switching angles in voltage source multilevel converters in order to minimize specific higher order harmonics and decrease the total harmonic distortion (THD) of their output voltage waveform. The output voltage waveform of inverter can either be in the form of staircase or PWM. In order to increase the degrees of freedom and elimination of m...

The present investigation sought to explore the relationship between learning styles and writing behaviors of EFL learners in a blended environment. It also aimed to identify the learning style types best predicting writing behaviors. Initially, the participants' preferred learning styles were identified through the Kolb’s learning style inventory (Kolb, 1984). Secondly, data were obtained thro...

  Translation of the Holy Quran can be difficult for translators in terms of accuracy and translatability. Sometimes translators fail to render the Quranic thoughts because of the lack of language features in target languages. This results in an unfavorable interpretation. One of the challenging aspects of translating Quran is reference switching as rhetorical devices, which are widespread i...

The paper introduces soft switching of a Boost Converter which can be included in the Electrical Vehicle technology. In order to raise the motor power rating, the DC link Vehicles, there is a great need for less component stress, smaller voltage of inverter up to 400V, and higher efficiency. The conventional Boost Converter generates switching loss at turn on and off thus the whole system's eff...

Voltage-controlled resistive switching in various gap systems on SiO2 substrates is reported. The nanoscale-sized gaps are made by several means using different materials including metals, semiconductors, and amorphous carbon. The switching site is further reduced in size by using multiwalled carbon nanotubes and single-walled carbon nanotubes. The switching in all the gap systems shares the sa...

Bilingual advantages in executive control tasks are well documented, but it is not yet clear what degree or type of bilingualism leads to these advantages. To investigate this issue, we compared the performance of two bilingual groups and monolingual speakers in task-switching and language-switching paradigms. Spanish-English bilinguals, who reported switching between languages frequently in da...

We investigate the resistive switching power from unipolar resistive switching current-voltage characteristics in various binary metal oxide films sandwiched by different metal electrodes, and find a universal feature (the so-called universality) in the switching power among these devices. To experimentally derive the switching power universality, systematic measurements of the switching voltag...

vascular endothelial growth factor (vegf-a) is one of the most important regulatory factors in pathological and physiological angiogenesis. alternative splicing is a complicated molecular process in vegf-a gene expression which adds complexity to vegf-a biology. among all vegf-a exons, alternative splicing of exon 8 is the key determinant of isoform switching from pro-angiogenic vegf-xxx to ant...