The transport of pure gases through a microporous membrane is described. The alumina-based membrane (pores 2.5-4 nm) is suitable for Knudsen diffusion separation . To improve the separation factor, interaction with and mobility on the pore wall of one of the gases of a mixture is necessary. To introduce surface diffusion of oxygen and hydrogen, a y-alumina membrane was impregnated with silver ....

introduction: there are several evidences in favour of  relationship of inguinal hernias and connective-tissue disorders. soldiers are one susceptible group for inguinal hernia. the aim of this study is to evaluate the prevalence of benign joint hypermobility syndrome (bjhs) in soldiers and its relationship to inguinal hernias during training periods. methods: this descriptive-analytic cohort s...

the effect of compost and humic acid in mobility and concentration of cadmium and chromium in contaminated soil were investigated. experiment was carried out with three levels of soil cadmium and chromium and two organic matters (compost and humic acid). the study was performed in a randomized complete block design with 3 replicates. results indicated that application of organic substances enha...

the phenomenological model of khossravi and connors (1992) has been adopted to calculate the electrophoretic mobility of drugs at different concentrations of solvents in a binary mixture. the accuracy and predictability of the model have been evaluated employing 14 experimental data sets by using average percentage mean deviation (apmd). the obtained apmd for correlative and predictive studies ...

Wireless sensor networks (WSNs) have shown great potential for serving a full spectrum of applications in a wide variety of environments. Of special interests are applications that operate in hostile setups such as combat zones and territorial border. These applications are categorized with the presence of adversaries who are eager to attack the network. The most effective approach for an adver...

The effect of diabetes on the structure and function of insulin receptors was studied in rats 7 d after streptozotocin injection, using solubilized, partially purified receptors from rat hindlimb muscles. Diabetes increased the number of insulin receptors per gram of muscle 60-70% without apparent change in insulin binding affinity. Incubation of receptors at 4 degrees C with [gamma-32P]ATP and...

Ubiquitous use of cell phones encourages development of novel applications with sensors embedded in cell phones. The collection of information generated by these devices is a challenging task considering volatile topologies and energy-based scarce resources. Further, the data delivery to the sink is delay tolerant. Mobility of cell phones is opportunistically exploited for forwarding sensor gen...

By adopting Session Initiation Protocol (SIP) in WiMAX networks, when the mobile node (MN) moves to a foreign network, the MN sends a re-INVITE message to the corresponding node (CN) to re-establish the connection. This re-connection time is the most costly factor for a handoff. To effectively reduce the re-connection latency, a hierarchical SIP (HSIP) mobility management incorporated with MAC ...