Mid-State Technical College

Background: An urban site index is an approach for identifying site quality for optimal matching of urban tree tolerances to site conditions and for determining the efficacy of soil management actions. The Rapid Urban Site Index (RUSI) was previously developed and found to significantly relate to urban tree performance. However, the RUSI needs further testing to verify its accuracy in other urban tree populations. Furthermore, calibration of the RUSI with parameter weighting and additional parameters might also improve its accuracy. Methods: The objectives of this study are to: (1) evaluate the RUSI in 3 Wisconsin cities; (2) evaluate RUSI parameter weighting models to improve its accuracy; and (3) examine the addition of a labile organic matter indicator to the RUSI for detection of a soil management action. Results: The RUSI was found to significantly correlate to urban tree metrics in 3 Wisconsin cities (r = 0.29 to 0.31; n = 90). Parameter weighting increased significant correlation values between urban tree metrics and the RUSI model (r = 0.24 to 0.37; n = 90). The Solvita® soil respiration test detected differences in soils from a biosolids application (P = 0.0275), and its addition to the RUSI model improved significant correlation values to urban tree metrics (r = 0.27 to 0.38; n = 90). Conclusions: This research demonstrates effective approaches for RUSI refinement. These findings show the RUSI to be a valid approach for urban site assessment and demonstrate how the RUSI can be tailored and refined for use in specific urban tree populations.

Various impression techniques used in the construction of free- end extension partial denture are based on theories relative to the compressibility and behaviour of the soft tissue during impression making and during function, the aim of the study was to measure vertical tissue displacement during impression making for free- and extension using different impression technique and materials. Material and methods: the study consisted of two parts (question are and clinical) the questionnaire was circulated among (90) dentists at different working places, to see which impression technique they use in free- and extension. In the clinical part (24) mandibular distal extension impression were made using three impression techniques and materials (special tray with alginate, special tray with polyether and double tray with zinc- oxide eugenol impression paste). The amount of vertical tissue displacement was measured on stone cast using (dial indicator dimension). Results: The results of the survey showed that (44%) of the dentist tend to use special tray with alginate, and (38.1%) of prosthodontist use double tray impression, the clinical part showed that there was significant difference between the impression techniques. Conclusions: The most popular impression technique used is special tray with alginate, which showed more tissue displacement in the clinical part of the study, while the double tray impression technique showed the least

Elevated Fe concentrations in the Y-12 SPWTF effluent primarily result from carryover of solids from the clarifier to the F-2 tank, the F-2 tank to the effluent line, and possibly from solids that collect the effluent line. An upgrade involving filtration equipment will improve the reliability of control over Fe removal. Recommendations are given for improving operating efficiency.