An aerobic fluidized bed reactor (FBR) was operated for the removal of methyl tert-butyl ether (MTBE) and benzene, toluene, ethylbenzene, and p-xylene (BTEX) from water. The reactor was seeded with a mixed culture adapted to MTBE. Granular activated carbon (GAC) was used as the biological attachment medium. Influent MTBE to the reactor was 7.8 mg/L MTBE, with a flow rate of 22.7 L/day, and an e...

Mindfulness is the ability of an individual to actively process information surrounding them with the aim of using that information to draw distinctive or novel conclusions. By facilitating mindfulness, businesses can benefi t from having a stronger competitive advantage, increased loyalty, and provide a more meaningful experience to their customers. Mindfulness is a state of awareness that can...

As visitors to national parks diff er in terms of their profi les and needs, an empirical evaluation of the quality of their experiences, if based on a homogeneous sample, may lead to false conclusions and, hence, inappropriate management decisions. Using Paklenica National Park as a case study, this paper aims to provide a more heterogeneous perspective on the defi nition of the quality of vis...

There is described a class of the encryption functions based on data-dependent selection of subkeys. Such functions are proposed for elaboration of the indeterminate ciphers with very large number of different modifications of the cryptalgorithm. A 128bit undetermined cipher is described. The number of possible modifications is ≈ 10, where 2 ≤ R ≤ 7, R is the number of rounds. It is proved that...