Abstract:We developed an improved model for predicting the steric-entropic effect on the separation behaviors of rod-like particles in flow field-flow fractionation. Our new model incorporates the "pole-vault" rotation of a rod-like particle near a wall under shear flow into the original model developed by Beckett and Giddings which considered only Brownian rotation. We investigated the effect of the aspect ratio on the retention ratios and the crosssectional concentration distribution in the separation of rods in field-flow fractionation (FFF). Our analyses involved comparing the results predicted using the original model and those from the new model under various rod geometries and flow conditions. We found that the new model can show the aspect ratio-enhanced elution trend in certain flow conditions for the assumption of non-constant cloud thickness (ratio between the cross flow rate and the rod diffusivity). We also deducted that the flow conditions allowing for the aspect ratioenhanced elution are related to the interplay among the axial flow rate, cloud thickness, and rod geometry. The new model can be viewed as a prototype to qualitatively show the aspect ratio-enhanced trend since its quantitative agreement with the experimental data must be improved for our future work.

No abstract

In this paper, we examine whether the size effect is present in four European markets viz. France, Germany, Spain and Italy. We also investigate whether the size effect can be explained through the sources as available in the literature. We employ prominent asset pricing models to ascertain if size anomaly in our sample countries passes the risk story. We find single-factor model i.e.capital asset pricing model to be still relevant in explaining size anomaly for Spain and Italy. We find FF3 factor model to be a suitable model to be explain for alphas in Germany, while we find that none of the asset pricing model is able to fully explain the size effect for France. Hence, we conclude that though size anomaly does not provide any opportunities to portfolio managers for making extra normal returns for their investors in three of the four sample countries. France, however, provides an opportunity to portfolio managers for exploiting size anomaly. Our findings have implications for portfolio managers, academia as well as regulators.

In this paper, we analyze dynamic interactions between stock markets of BRICS (Brazil, Russia, India, China and South Africa) and other select emerging economies as classified by IMF [1] from January 2001 to June 2017. We employ ADCC-EGARCH model as well as block aggregation technique as suggested by Diebold-Yilmaz [2] framework and order-invariance of GVDs (Generalized Variance Decompositions) as developed by Greenwood-Nimmo, Nguyen, & Rafferty [3] to examine return and risk spillovers within as well as across the BRICS and other sample Emerging Market Economies (EMEs). The results suggest the cohesiveness within BRICS equity markets is moderate. Our results also show increased integration amongst BRICS economies during the global financial crisis period, implying the presence of Contagion effect. Furthermore, Mexico, Chile, Hungary, Turkey and Poland seem to be good candidates to be included along with BRICS for forming a larger Emerging market economic block. This expanded block will not only ensure strengthening trade and financial ties among the participating countries, but also provide a better balance between the emerging and the developed world. This paper contributes immensely to the literature on international finance dealing with financial integration, particularly for emerging markets. The study provides important implications for global policy makers, international economic agencies, investors and the academic community.

Remote monitoring concept raises a lot of interesting possibilities, and helps to address different issues continually faced with effective patient administration. It is possible to record and transmit the vital signs of a patient using wireless and cellular technologies. This paper describes the definitions of remote patient monitoring. The content includes limitations of remote patient monitoring. Finally, the open challenges of RPM are debated to encourage more investigations into the domains.