"An ethical objection is raised against the Blackorby-Donaldson criterion of optimum population maximizing the sum total of utilities in excess of some critical level, since it may disprefer a social state with more people and with more worthwhile lives. However, the criterion may serve as a practicably reasonable compromise between maximizing total and average utility. Nevertheless, an alter...

Finding optimum and near optimum edit scripts between an XML document and a schema is essential to correcting invalid XML documents. In this paper, we consider finding K optimum edit scripts between an XML document and a regular tree grammar. We first prove that the problem is NP-hard. We next show a pseudopolynomial-time algorithm for solving the problem.

in this study, vanadium recovery from the steelmaking converter slag was studied. salt roasting-basic leaching is the process which was applied to separate and extract vanadium from steel making slag. ground slag was roasted after mixing with determined quantities of sodium carbonate. the effect of time and temperature of roasting and sodium carbonate content were studied. the optimum temperatu...

agar is a gelling biopolymer that can be extracted from cell wall of some red algae. in this present, response surface methodology was used to investigate the procedure of agar melting point and gelling temperature from cultural algae of gracilariopsis persica. independent variables, alkalinity concentration (2, 3.2, 5, 6.8, -8%), extraction temperature (90, 96, 105, 114, 120°c) and extraction ...

In the present study, silica aerogel- egg shell was synthesized for dye removal of colored wastewater. The nano composite structure was characterized by Fourier transform infrared spectra FTIR and scanning electron microscope SEM.The ability of nano composite absorption was assessed for removal basic violet 16BV16 dye from aqueous solutions and was compared with two other adsorbents such as egg...