Usually, in concentration polarization models, the mass transfer coefficient is an unknown parameter. Also, its variation with changing experimental circumstances is in question. In the literature, many relationships can be found to describe the mass transfer coefficient under various conditions, as well as various corrections for deviating behaviour during ultrafiltration. To obtain reliable m...

We present an explicit cosmological model where inflation and dark energy both could arise from the dynamics of the same scalar field. We present our discussion in the framework where the inflaton field φ attains a nearly constant velocity m P |dφ/dN | ≡ α+ β exp(βN) (where N ≡ ln a is the e-folding time) during inflation. We show that the model with |α| < 0.25 and β < 0 can easily satisfy infl...

This document aims to provide a framework for the support of wireless LANs (WLANs) in an IPv6-only environment. It is hoped that it will serve as an IPv6 WLAN design and implementation guide for readers that are unfamiliar with IPv6 and/or WLANs. The original focus for this document was to be on access control solutions but we have now expanded the scope to include all aspects of deploying IPv6...

Several ultrafiltration membranes of the anisotropic and isotropic type were characterized by means of the thermoporometry. Successive cooling and heating runs were performed in order to investigate the effects of the water-ice and ice-water phase transitions on the structure of the membranes. The results found for membranes having different casting thicknesses indicate that, in some cases, por...

Wearable blood processing devices offer an attractive solution to problems inherent in clinic-based, intermittent end-stage renal disease therapies. What is involved in transitioning even a part of the current clinic-based population to ambulatory therapy has not been clearly enumerated. This paper addresses what a first-generation wearable device might accomplish, how issues of safety will nee...

Radio spectrum has increasingly become a strategic scarce resource in the digital world. The demand for pervasive wireless connectivity has exploded driven by smart devices and the consumption of video and Internet on the move as well as innovative services in various sectors such as transport, healthcare or energy. The Digital Agenda for Europe (DAE) and the Radio Spectrum Policy Programme (RS...

This document aims to provide a framework for the support of wireless LANs (WLANs) in an IPv6-only environment. It is hoped that it will serve as an IPv6 WLAN design and implementation guide for readers that are unfamiliar with IPv6 and/or WLANs. The original focus for this document was to be on access control solutions but we have now expanded the scope to include all aspects of deploying IPv6...