this research analyze the resource and structure of cross-autocorrelation in returns and volatility of stocks that listed in the tehran stock exchange during the period farvardin 1382–eisfand 1386, with employing the garch model. at the first, the results show that, in down(bear) market, return on high trading volume portfolio lead return on low trading volume portfolio, when controlled for fir...

Cross-line trains, as a link between high-speed and conventional rail networks, will increase the complexity of transport organization and lead to significant challenges in dispatch coordination between the two systems. Based on the characteristics of high-speed transport organization, this paper deals with the necessity of dispatch coordination between high-speed and conventional lines from th...

This paper presents fuzzy and conventional performance of model reference adaptive control(MRAC) to control a DC drive. The aims of this work are achieving better match of motor speed with reference speed, decrease of noises under load changes and disturbances, and increase of system stability. The operation of nonadaptive control and the model reference of fuzzy and conventional adaptive contr...

1. FECHET, J. E.-" Those airplane crashes; how they can be prevented." Flight Surgeon Topics, School of Aviation Medicine, Randolph Field, Texas, Vol. I, pp. 44-48, 1937. 2. FERREE, C. E. and RAND, G.-" The inertia of the eye for clear seeing .-t different distances." A study of ocular functions with special reference to aviation. Amer. JI. Ohthal., Vol. I, pp. 764-776, 1918. 3. FERREE, C. E. a...

Article history: Received 31 December 2013 Received in revised form 17 April 2015 Accepted 20 April 2015 Available online 25 April 2015 This paper investigates how cross-country variations in institutional variables affect the relationship between rating changes and firms' capital structure adjustment. Our results demonstrate first that the asymmetric effect exists, that is, firms adjust their ...

Using Japanese firm data, this paper examines the relationship between firm value and financing decision factors within a free cash flow (FCF) framework. The findings are broadly consistent with the positive tax benefits hypothesis. We find that in firms leverage is positively related to firm value and dividends are negatively related to firm value during the sample period, 1985 to 1996. The re...

BACKGROUND AND PURPOSE Walking speed is a simple, reliable, and valid measure of functional status that has been shown to be strongly correlated with age-related outcomes and may be an indicator of subclinical cerebrovascular disease. However, few studies have investigated the association of walking speed with risk of incident ischemic stroke. METHODS The present analyses included 13,048 post...

The detection of influential observations for the standard least squares regression model is a question that has been extensively studied. LAD regression diagnostics offers alternative approaches whose main feature is the robustness. In this paper a new approach for nonparametric detection of influencial observations in LAD regression models is presented and compared with other classical method...

Following EU’s Lisbon strategy development of knowledge-based economy has become one of the headline objectives for the government of Latvia. In this paper we conceptualize driving forces and responses of government’s commitment towards this objective. We investigate feedback loops that underlie dynamics of knowledge industry development. Increase in domestic Research and Development (R&D) acti...

vision and then adopted after an extensive design process. OISD may serve to be a more powerful model of change in that it capitalizes on powerful system concepts such as positive feedback and key leverage points, while still retaining a pragmatic orientation. The six phases of OISD are described below. The phases are loose and overlapping; they naturally would probably occur in sequential orde...