Radiographic interpretation of experimentally produced bony lesions.
Abstract Simulated bone-destroying lesions were created at the apices of two molars and four premolars in a sectioned mandible. All radiographic variables other than bone loss were strictly controlled. Results indicated that in the premolar region it is possible to detect radiographic change without involvement of the junctional or cortical bone, at least to a greater degree than in the molar region.
CLINICAL PRACTICE GUIDELINES LIGNES DIRECTRICES DE PRATIQUE CLINIQUE
deadline: Nov. 30, 1993 Keynote address: Dr. Judith Kazimerski Child care available during the conference. I. Ellis, conference coordinator, Faculty of Health Sciences, Rm. 1 M 10, McMaster University, 1200 Main St. W, Hamilton, ON L8N 3Z5; tel (416) 525-9140, ext. 2182; fax
Numerical Simulation of Induction Heating Process of Continuous Casting Slab
Compared with traditional blazing furnace, the Continuous Casting-Direct Rolling is an advanced manufacturing steel technology, which can reduce energy waste, decrease pollution and enhance efficiency. The characteristics of steels during induction heating are complex, the change of material properties with temperature makes exact analysis methods very difficult to implement. Therefore, a powerful computer aided numerical tool (i.e., finite difference analysis) is selected to numerically model the induction heating process in this paper. The mathematic model coupling with electromagnetic field and thermal field was established, and it was solved by finite difference method (FDM), thus the slab temperature distribution and its variation with time were obtained, and the characteristics in whole induction heating process were studied. To validate the program feasible, the results were evaluated and compared with experiment results, which showed that the simulation results are reliable and effective. The skin effect in heating process from the two results was studied and demonstrated, the temperature change caused by different parameters such as the induced power intensity and the corner radian were also presented, which indicate that the slab temperature can be heated uniformly through adjusting these parameters, thus the continuous casting slab can meet the rolling requirement.