Revised and Updated: The Definitive Hands-On Guide to Solid Modeling with SolidWorks 2021 Fully updated for SolidWorks 2021, Mastering SolidWorks, Third Edition, thoroughly illuminates solid modeling CAD techniques for developing parts, assemblies, and drawings. Additional specializations, SolidWorks toolboxes, and manufacturing techniques are also covered, including sheet metal, injection molding, and animation. New illustrations reflect SolidWorks 2021 throughout, and this edition fully reflects changes in workflow since SolidWorks 2014. Mastering SolidWorks can develop CAD skills in students with little or no solid modeling expertise, help more advanced students hone specialized skills, and prepare any SolidWorks user for SolidWorks Associate (CSWA) or Professional (CSWP) certification. Written especially for beginners and intermediate users, it will also be valuable to experienced users requiring specialized knowledge, to companies training their own professionals, and to all schools teaching engineering, design, or 3D modeling. Understand SolidWorks as a powerful design/manufacturing system, not just a piece of software Learn key modeling concepts for working efficiently, avoiding errors, and transferring your skills anywhere Rapidly create, assemble, document, and visualize parts Embed "design intelligence" to make parts easier to edit and manufacture Master part modeling: from basic features, drawings, and assemblies to advanced curves, surfaces, and sustainable designs Develop and analyze parts using tolerances and SolidWorks analysis tools Manufacture parts with rapid prototyping, numerical control machining, and injection molding

This study aimed to Assess the prevalence of HCV infection among high risk group of Egyptian children and Evaluate the detection of HCV antibodies (anti-HCV) and HCV RNA in saliva against their detection in serum among HCV positive children.This study included 200 children (92 males and 108 females) who were attendants of Haematology Clinic at Abu El-Reish Hospital, Cairo University, for receiving frequent blood transfusions. Serum and saliva samples were analyzed for detection of anti-HCV by ELISA technique and for HCV RNA by a home made RT-PCR method. Liver function tests were performed also. Results of serum samples revealed that 134/200 (67%) children were anti-HCV seropositive, out of them 79/134 (59%) children had HCV RNA in their sera. Saliva samples of HCV infected children (n=79) showed that 53/79 (67.1%) and 31/79 (39.2%) were anti-HCV and HCV RNA positive respectively. Prevalence of HCV infection was 39.5% of 200 studied children. We can conclude that saliva could play a possible role of biological fluids as a non parenteral route of intrafamilial spread of HCV infection