In learning to use software, people spend at least 30% of their time on dealing with errors. It could therefore be desirable to exploit users’ errors rather than to avoid them. That is, to include error information in a manual to support users in dealing with errors. An experiment was performed to examine the functionality of such error information in a manual for a word processor. Two manuals ...

the nomad communities played an important role in the socio-economic status of the iranian society from the beginning of the twentieth century. following the political events of reza shah such as settling strategy, the nomads lost their importance and marginalized. the present paper aims study the social and cultural transitions among the turkman tribe to find out how settling strategy led to t...

background:   after cervical discectomy, autogenetic bone is packed into the cage to increase the rate of :union: between adjacent vertebral bodies, but donor site–related complications can still occur. in this study we evaluate the use   of hydroxyapatite granules as a substitute for autograft for interbody fusion.     methods:   from november 2008 to november 2011, 236 patients participated i...

Selective flocculation has long been suggested as a method for the treatment of ultra-fine particles typical of which are those produced in a de-sliming process ahead of flotation. In this paper the results of the coal de-mineralization, using synthetic polyacrylamide polymers, are presented. A prescreening test on the suitability of the polymers using Run-Of-Mine (R.O.M.) coal and artificial m...

the activated sludge process is the most used biological wastewater treatment method in the world. sludge bulking is one of the most common problems relateing to activated sludge wastewater treatment, and this fact causes poor settling in secondary sedimentation tank. sludge volume index(svi) and the zone settling velocity(zsv) are parameters to quantify the settleability of activated sludge . ...

Settling disputes, even disputes about meaning, by third party arbitration is different from settling them by negotiation. Moreover, disputes can be settled by a procedure in which the disputing parties follow a protocol that prohibits them from simply following their original aims. They can collectively constitute an arbitrator. This provides an alternative model for resolving differences in m...

The expansion G of a graph G is the 3-uniform hypergraph obtained from G by enlarging each edge of G with a vertex disjoint from V (G) such that distinct edges are enlarged by distinct vertices. Let exr(n, F ) denote the maximum number of edges in an r-uniform hypergraph with n vertices not containing any copy of F . The authors [11] recently determined ex3(n,G ) more generally, namely when G i...

The design of multivariable ripple-free deadbeat controllers is a complex task. One approach which has shown promise for solving multivariable ripple-free deadbeat control (MRFDC) problems is the use of Diophantine equation parameters. The problem of solving robust multivariable ripple free deadbeat with time delays has not been solved. This paper proposes a hybrid two degree of freedom control...