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Jose Luis Dengra profile image

Jose Luis Dengra

Student

  • 5 reviews
  • 5 completed
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This is a great course, because of its interesting topics and the quality of the most of the explanations. There is a valuable effort in preparing videos trying to be didactic and evolve from slow to fast speed in the speech. This is a suitable approach to the international scope of students for the course, where so many of us don't speak English as primary language. Thanks to this course, I have noticed how uninformed I was about the technology used to deal with data in the web. I am working as database analyst, also with business intelligence, and now I am glad to know about other kind of technologies beyond traditional databases. All the topics have been interesting for me, since I was interested in getting to know about search engines, machine learning, data mining, and how to deal with big data. I have been surprised by the variety of technologies and techniques, as well as the quality of the explanations in the most of the lectures, some of them excellent, that make me remember when I was at University. Another phenomen that has surprised me is the great number of people enrolled in this class, and the quantity of thoughts, doubts and help available in the forums, from people from all around the world learning together, something unprecedented in the courses I've done previously. It's difficult to believe that a great course like this is available for free. However I have found some disadvantages: the complexity for some of the topics, some ambiguities and inaccuracies in the language that difficult the understanding, and finally the way that the extra activities are weighted to compute the final aggregate grade, since they don't really help if you have completed all the quizzes so they don't add any extra quantity to the final score.
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It has been for me a great experience to be able to review and revisit databases fundamentals in this training, not only in an introductory way but also with plenty of practical exercises. When I studied databases at University more than a decade ago, some of the topics were not included, namely XML, JSON, recursion, UML, OLAP and NoSQL. It was pleasant for me to gain knowledge and practice them in this course, since I deal with these topics at work but without any kind of help. I would have liked to have been introduced to them before. I strongly recommend this course to any developer or analyst, because these concepts and techniques are crucial to work properly with databases, and all of them will appear sooner or later in our professional years at least for most of us.
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I completed this course in fall season 2013. Thanks to this course I am aware about what metadata is and its importance for the present and the future, as well as key concepts as interoperability. Although many links, samples, and practical exercises are given, the metadata nature is abstract and difficult to digest. The professor is excellent with a great background knowledge, and really helps to understand the topics. Metadata have multiple formats in different fields and applications, and it's a humongous world where one can lose one's way easily.
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This course is a mere introduction to R fundamentals. I have completed it, but I don't feel comfortable working with R. I have learned some concepts and techniques, but to achieve the programming assignments I have needed to search many times in R documentation and internet, as well as to perform many test- and-error attempts to get any of the results. Some of the video lectures were longer than 30 minutes and difficult to be followed.
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Thank you, Charles Severance and collaborators. It has been an excellent learning experience for me. Thank you very much for your help making the explanations easy-going and changing the due dates to be flexible and make possible to really learn. It is unusual to find such an easy to learn and pass course. The explanations were excellent but simple at the same time. In some video lectures I even did not need to rewind to understand, as opposed to some other courses where I needed to expend so much more time, even hours, for a single explanation. Congratulations for your enthusiastic way of teaching! I will never forget this great course and this excellent professor.