Optimal machining conditions for turning Ti-6AI-4V using response surface methodology     

Satyanarayana Kosaraju  Venu Gopal  Anne 《上海大学学报(英文版)》2013,(4):329-339

Machining titanium is one of ever-increasing magnitude problems due to its characteristics such as low thermal conductivity, modulus of elasticity and work hardening. The efficient titanium alloy machining involves a proper selection of process parameters to minimize the tangential force （Fz） and surface roughness （Ra）. In the present work, the performance of PVD/TiA1N coated carbide inserts was investigated using response surface methodology （RSM） for turning Ti-6A1-4V. The effects of process parameters such as speed （v）, feed （/＇）, depth of cut （d） and back rake angle （Ty） on Fz and Ra were investi- gated. The experimental plan used for four factors and three levels was designed based on face centered, central composite design （CCD）. The experimental results indi- cated that Fz increased with the increase in d, f and decreased with the increase in v and yy, whereas Ra decreased with the increase in v and 7y, and increased with d and v. The goodness of fit of the regression equations and model fits （R2） for Fz and Ra were found to be 0.968 and 0.970, which demonstrated that it was an effective model. A confirmation test was also conducted in order to verify the correctness of the model.  相似文献   

Introduction to the journal of learning disabilities special issue: adults with learning disabilities in adult education     

Taymans JM  Kosaraju S 《Journal of learning disabilities》2012,45(1):3-4

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The impact of an early intervention home visiting experience on student learning in a dual early childhood/special education graduate preservice program     

Bonnie Keilty  Sagarika Kosaraju 《Journal of Early Childhood Teacher Education》2018,39(3):243-260

Home visiting is a primary service delivery approach to promote young children’s development and support families. Early Intervention professionals are expected to partner with families to create effective learning experiences in the daily context of routine family life. Concerns about early childhood (special) educators’ readiness to take on this partnership role have been voiced, suggesting explicit learning opportunities are needed within preservice preparation programs. This study explored the impact of an introductory assignment analyzing a videotaped home visit on preservice Early Childhood Education/Early Childhood Special Education students’ learning about home visiting practices. Implications for scaffolding home visiting experiences in preservice preparation are discussed.  相似文献