The present article describes how scaffolding is implemented in an intelligent tutorial system call NTUs (Number Transcoding tUtorial System), and what are the results of the system tested empirically on a group of grade students in fostering their number concepts. To use NTUs. the system first analyzes a user’s errors on a number transcoding task, and the results of analysis are used to infer ...

Dzialowski, A.R., S.H. Wang, N.C. Lim, J.H. Beury and D.G. Huggins. 2008. Effects of sediment resuspension on algal biomass and nutrient concentrations in reservoirs of the Central Plains. Lake Reserv. Manage. 24:313-320. Historically, lake and reservoir management has focused on controlling external nutrient loading. However, it is becoming increasingly clear that internal mechanisms, such as ...

<p>This goal of this study was to evaluate the effectiveness a new coagulant extract from pumpkin seeds (PSC) for removing turbidity and organic compounds different natural surface waters. Two design experiment methods, namely central composite (CCD) response methodology (RSM) were used optimize PSC removal matter via chemical oxygen demand (COD) water. The CCD results indicated that more...

Static coseismic offsets >1 mm are observed up to 7800 km away from the great Sumatra-Andaman earthquake of 26 Dec. 2004 using global GPS network data. We investigate the rupture process based on far-field continuous GPS data. To reduce error in the coseismic offset estimates due to post-seismic deformation in the days following the main shock, we simultaneously fit a model of coand postseismic...

Remote sensing was used as an early alert tool for water clarity changes in five Araucanian Lakes South-Central Chile. Turbidity records are scarce or unavailable over large and remote areas needed to fully understand the factors associated with turbidity, their spatial-temporal representation remains a limitation. This work aimed develop validate empirical models estimate values of turbidity f...

This paper studies precipitable water vapor (PWV) in 2015-2016, an El Nino-Southern Oscillation episode (ENSO), and causes drought Indonesia. Using the Global Positioning System (GPS), we obtained PWV value. Expected can detect ENSO phenomenon through We processed GPS observation data by Precise Point (PPP) method using goGPS software. The values of Zenith Troposphere Delay (ZTD) were validated...

Cement paste is an already well-known material used in ore mining. It mainly to fill excavation areas and the tailings from surface return underground mines. In this way, amount of deposited degradation terrain are reduced. The itself can be as artificial barrier between mining works watercourses. Significant economic environmental benefits expected using cement paste, which would contribute su...