Non-Ferrous Extractive Metallurgy Prof. H. S. Ray ...文档.pdfVIP

Non-Ferrous Extractive Metallurgy Prof. H. S. Ray Department of Metallurgical and Materials Engineering Indian Institute of Technology, Kharagpur Module No. # 01 Lecture No. # 01 Brief History of Non-Ferrous Metal My young friends; I find myself, in a very unusual situation, where the students can see me, but I cannot see the students. I also do not know that what time of the day it is, when you are watching this video. I do not know whether to say good morning or good afternoon, or good evening. But one thing I know, for sure, I know what kind of people you are. Presently, I am a retired scientist. I retired 9 years ago, but I have been a teacher for many years at IIT-Kanpur and IIT- Kharagpur. I have thought hundreds of students in those institutions and elsewhere. I specially, have always vibed very well with the undergraduate students and I have found that, basically every class, was so very similar. There were always some students, who were very sincere; they take down notes. Copious notes, if I utter one sentence, they write down three sentences. There are some students, who are never looking at me. They are looking at the walls or through the windows, but somehow, I can sense that they were listening. When I asked them, some questions later and they could respond very positively. On the other hand, there have always been some students, who would be looking at me but they would be blank faces. It means they may be hearing at the most, but they would not listen and obviously, there would be some students, who would be rather elsewhere. Now, as a teacher, most of us who have been teachers, would like to connect with those people; a few people who are listeni