introduction : solubility of root filling materials is heavily influenced by the environment they are in contact with. this study compared the solubility of proroot mta in deionized water and synthetic tissue fluid. materials & methods: forty specimens of prepared mta were immersed in deionized water and synthetic tissue fluid (20 samples each). the solubility was assessed after 7 and 28 days. ...

A prerequisite in refining volcanic hazard at explosive volcanoes is a better quantification of the timescales syn-eruptive processes, such as magma degassing and crystallization prior to eruption. To this aim, new data on matrices (microlites, residual glasses, bubbles) pumice, scoria, dense clasts erupted during AD 1530 andesitic eruption La Soufrière Guadeloupe are combined with published fr...

In aggregative games, each player's payoff depends on her own actions and an aggregate of the actions of all the players (for example, sum, product or some moment of the distribution of actions). Many common games in industrial organization, political economy, public economics, and macroeconomics can be cast as aggregative games. In most of these situations, the behavior of the aggregate is of ...

background and aims. mineral trioxide aggregate and calcium hydroxide are considered the gold standard pulp-capping materials. recently, portland cement has been introduced with properties similar to those of mineral trioxide aggregate. histopathological effects of direct pulp capping using mineral trioxide aggregate and portland cements on dog dental pulp tissue were evaluated in the present s...

This paper aims to show why the answer to the food security paradox in Pakistan cannot currently receive an answer, due to the type of policy assessment done until now. In order to know whether a given policy has been effective or not, it needs to be assessed. The problem in Pakistan is that food security policies have not received the right type of assessment. It appears to have been a neglect...

Many researchers are reluctant to use aggregate data in program evaluation and other policy relevant research. Aggregate data refers to data on individuals that have been averaged by year, by geographic area, by service agency, or in some other way. For example, data on the individual earnings of job training participants may be aggregated by year or student test scores may be aggregated by sch...

Despite Internet success and the fact that software has become the factory in many businesses, questions remain concerning information technology (IT) business value, the IT payoff paradox, and why IT even matters. While numerous econometric studies have established that there is significant business value from IT investments at an aggregate level, it is often unclear how this value accrues spe...