View source for Scilab/C2/The-amazing-resource-of-Scilab-Textbook-Companion/English

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|00:05
|So let me go to another solution that we came up for this problem 

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|00:12
|that good documents are missing that solution is called Textbook Companion or TBC in short.

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|00:21
| So let us see more about it students are good in coding, but not with documenting 

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|00:28
|but India has about 10 Lakhs engineering students every year. 

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|00:33
|Can we use this students to create documents.
 
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|00:37
|We need documents we are short of documents, unfortunately students don't like documentation even if they are good in coding.

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|00:49
|So how do we solve this problem. We have lots of students who can do coding but we want documentation.

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|00:55
|So we decided to address this by solving the inverse problem. 

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|01:01
|what is the inverse problem ask the student to write code for existing documents

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|01:09
| okay for student of course textbooks are the best documents. 

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|01:15
|So we said ask them to write Scilab code for solved example of standard textbooks.

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|01:24
|Notice this solved example we are not talking about unsolved problems. 

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|01:29
|Solved examples good textbooks give every step step by step explanation and solution. 

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|01:37
|One can implement in Scilab and verify scilab code line by line and any good student should be able contribute. 

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|01:49
|So this is how we started if they do for it for all solved example of a book 

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|01:56
|you get one text book companion and we pay Rupees 12000Rs for 1 textbook companion as honorarium.

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|02:08
| We also give certificate and we also give link for it.

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|02:12
| As matter of fact there is one student from IIT Madras he wrote to us saying that thanks to this textbook companion 

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|02:22
|he got an internship in a Japanese company So he was very happy about it. 

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|02:28
|funding for this comes from the funds the grant that we received from national mission on education through ICT MHRD.

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|02:38
|which has been very generous in supporting this activities.

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|02:42
|So I would like to invite all the students to benefit by this to contribute to this and also to use this. 

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|02:50
|How does one used it I am going to explain shortly okay 1000 college student and faculty contributed.

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|02:58
|This students came from all over India all parts of India 600 textbooks were covered and 70,000 example were coded. 

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|03:09
|If you assume that there are 100 examples in a textbook then there will 60,000

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|03:15
|some text book have actually more than 100 examples so we have 70,000 example coded.

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|03:23
|You can download this textbook companions for offline use so let me click this so this Scilab.in 

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|03:32
|On the left hand side so this the website that we have created and we support at IIT Bombay.

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|03:47
| By the way the software Scilab is not created by us Scilab is infact we have given a disclaimer also that it's ofcourse 

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|03:56
|we have said that its trademark of Inria and Scilab Enterprises and it has been now bought over by a company.

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|04:07
|and I will show the link for that here but let's come here lets come back to the page and 

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|04:29
|let's go to textbook companion project and you have something called completed book.

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|04:27
|Let me click this you can see that there are 594 books that have been completed so it has if I just scroll down

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|04:40
|You will see that there are indeed 594 books here it is. 

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|04:47
|It's possible to get book according to specialization so let me do that instead of choosing all categories

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|05:03
|let me choose electrical engineering for example and in that let me choose there are more here signal processing.

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|05:20
|now if you go through this you see that in signal processing alone there are 17 books

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|05:26
|So this is very popular book by Proakis and Manolakis DSP. 

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|05:31
|so let me click this and it's says that download codes notice that we are not giving a book 

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|05:40
|we are only giving scilab code to understand that code you need the book as a result.

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|05:47
| This is a true textbook companion it only give Scilab code

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|05:53
| It doesn't give the book we cannot copy the book and distribute that will be violation of copyright we don't do such illegal things.

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|06:03
|so here, if you click this you can download entire Scilab code. 

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|06:11
|if you click here you can get the PDF lets click this and see what it has so it's downloaded here.

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|06:19
|so here you are this is created by Prof Senthilkumar from IRTT in Erode he is a college teacher

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|06:29
|and let's go down So it has all the example by chapter.

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|06:39
|You also have it in terms of example number so for example if you want to say exponential decreasing signal example 2.1.09.

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|06:52
| let me click this there it is example 2.1.09

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|06:59
|So you can reach this directly and notice that it has code after code which is not given in the book.

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|07:10
| what is given in the book is not reproduced here as a result there is no copyright violation at all as matter of fact.

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|07:19
|It's other way around we are here helping authors of book by giving scilab code.

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|07:27
|There may be authors who may not given any code with there book 

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|07:32
|but we have given scilab code and we have given it for 600 close to 600 books infact 594 as of now.

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|07:41
|and there are some more book in pipeline those are undergoing under review revision and so on and so-forth

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|07:51
| okay let me just see we have anything else here.

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|07:56
| We can download code for an entire book or chapter let me show you So here I showed how to download a PDF version

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|08:08
|let me close this we are back in the download course that we saw earlier 

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|08:17
| So instead of Download PDF if you download here you will get all the Scilab code as a zip file

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|08:25
| Instead you can say that let's open discrete time signal and system chapter 2 let's choose an example. 

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|08:45
|let say exponential increasing  decreasing signal here is a code 

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|08:56
|so I don't have to download the entire book I have I can choose a chapter

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|09:04
| If I click here and download I will get the zip file for that chapter only 

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|09:14
|Instead I can say that I don't want it for whole chapter there are too many things

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|09:18
| I get confused I want scilab code for only one example So I have selected this 

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|09:26
|So let me click this let me show in Finder okay I ran it you see the output okay 

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|09:51
|so it is possible to do that let me close this So as I told you earlier. 

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|10:02
|you can download the code for entire book or a chapter or an example

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|10:09
| So which is very useful because you can just go to example that you like download only that code run it test it.

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|10:17
|Now I am going to give a demo of scilab cloud on GARUDA so here is the link let me click this So let me demonstrate it 

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|10:31
|let me choose once again electrical engineering I will choose control system 

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|10:43
|I will choose B.C Kaou Frequency Domain Analysis see how it is organised 

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|10:53
| First the main category than subcategory in that what is the name of the book  and what is the chapter and what is the example 

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|11:04
|I want to choose bode plot the moment I selected I get the code here 

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|11:12
|so this is written by some student one of your friend from across the country.

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|11:19
|So lets execute this so it gives bode plot you can download if you want

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|11:28
|lets close it and here its result let me zoom it little bit okay you can actually see that.

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|11:38
|Now I am going to ask you quiz suppose I increase the gain of this transfer function lets go to 5000 

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|11:51
|okay that's right you can actually edit this page

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|11:55
|So I have change this from 2500 to 5000

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|12:00
|Now If I do that what will happen to gain margin and face margin.

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|12:05
|I want you to note down gain margin is 14 Face margin is 31 

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|12:11
|If I increase the gain what will happen to this system lets go ahead

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|12:19
| So this goes to GARUDA cloud which is hosted in Banglore Sydac let me close this. 

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|12:28
|yes if you guess it correct the margins will come down 14 has become 8 and 31 has become 17 

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|12:42
|so it is possible for you to try out all the 70000 example on the cloud. 

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|12:51
|So how do we use this TBC as a documentation

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|12:56
|what do I mean by that supposing you want to know how to use scilab for the first four year transform because you have in your course.

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|13:05
| So open the textbooks there must be example that shows how to solve first four year transform.

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|13:14
|How to implement first four year transform.

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|13:18
|So that example is given you got to that textbook companion in Scilab as 600 books are covered most likely your textbook is also covered

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|13:29
| you go to that chapter particular example and open the scilab code. 

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|13:36
|It tells you how first four year transform is done. 

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|13:40
|Okay what do we do if the book is not covered 

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|13:44
|you propose or you ask a smart classmate in your class that to do this for you 

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|13:52
|and that person can create textbook companion on that book and the problem is solved.

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|14:00
| okay It can be used as documentation as I mentioned It can be used for what if studies

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|14:07
|like I mentioned for example like we did for example increase the gain by 2 

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|14:15
|you may want to reduce the friction  factor by 10th. 

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|14:21
|you may want to change the bandwidth of some communication channel and so on and so forth.

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|14:27
| So its very easy if you are a faculty member you are teaching a class just project this 

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|14:34
|and then you can just do it online ofcourse you need internet connection. 

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|14:40
|If you don't have internet connection use the offline version that I showed you little while ago

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|14:46
| it is ofcourse useful for students also. 

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|14:49
|You want understand how a particular topic is covered you want to improve it you can do that as a matter of fact. 

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|14:57
|I believe that this alone that is textbook companion alone is useful for more than 40 lakhs engineering students

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|15:07
| who are in our colleges in anytime for them scilab is more than enough.

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|15:14
| It is only for very small fraction of student who may want extra things

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|15:18
|Who may want extra things which may not be available in Scilab.

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|15:23
|they might say they want to use some other software. 

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|15:25
| My question to you is, So for that 1 percent of the students 

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|15:32
|should we used some other software that will tax all the 99 percent of the students.

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|15:38
| That's why I said use Scilab wherever possible and that Scilab is good enough for 99 percent of the students like 

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|15:46
|we demonstrated for the remaining 1 percent of the application.

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|15:50
| Use whatever software whether it is opensource or commercial 

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|15:54
| whatever it is but don't impose commercial on the 99  percent of the student who can get by with scilab. 

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|16:03
|It is also true for industry what how many companies solve ex-chattering all the time

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|16:13
| very rarely do they solve such problem for most of them. 

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|16:18
|What is available in scilab is more than enough and it's absolutely open source.

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|16:23
|All companies can also use Scilab absolutely free of cost and of course this useful for the people all over the world 

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|16:34
|Imagine this is something created by us by our students

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|16:40
|By who are funded by our Taxpayer made available to whole world that's the beauty of opensource software. 

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|16:49
|you create good product and share it and lots of people can benefit by that. 

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|16:56
|just like Scilab was created by somebody and left it as open source for all our students to benefit 

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|17:03
|we also reciprocate in this manner there is another very nice thing that we have created

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|17:10
|On top for this textbook companion code search let me show you.

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|17:15
|We click this link if you click this it comes here once again it is in scilab.in website 

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|17:22
|how did I reach here search TBC code search this what I find.

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|17:28
|So how do I use it when you know need to know the name of the command 

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|17:34
|How do I locate the name of the command I do google search for example

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|17:41
|I wanted to set a problem in partial fraction in Scilab I had forgotten the command 

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|17:50
|I had forgotten the syntax so I said partial fraction Scilab 

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|18:01
|So very first link is PFSS So I know the command I found the command name now how do I find example

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|18:12
|I have had very bad experience of trying to get working example in the past

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|18:20
|and I do a google search I get lots of hits 100,000 hits but not useful one.

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|18:29
|I have to search one after another for working code but we have solved the problem in our code search

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|18:38
|Remember the command PFSS so I come here and I searched PFSS I search it says 140 results found where are this from remember.

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|18:57
|I told you that there 70,000 examples that have been coded by your classmate student across the country. 

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|19:06
|they have made available out of 70,000 example 140 of them have used PFSS. 

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|19:15
|The first one is by this circuit analysis book let me go down here is the book by Ashok here is the book by Babu 

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|19:36
|here is the book by Salivahanan here is the book by Manke you keep doing it until you like a book that is displayed.

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|19:48
|here is the book by Coughanowr which I used when I was a student

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| I said hey you know I have used this book let me view this example. 

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|19:59
|It immediately takes me to the scilab oncloud that we have seen before

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|20:06
|This is example 2.4 in that book and if you see here the notice that PFSS. 

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|20:15
|So all I have to do is execute and I get the result.

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|20:23
|only denominator is displayed that is because of numerator there is a semicolon

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|20:28
| let me deleted let me run it and I get numerator also displayed.

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|20:36
|You can see the partial fraction is with  a denominator x-2 this is x+1, x-1 and so on. 

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|20:42
|So if I don't like this I can modified it re-run it I can get example and so on.

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|20:48
|So this is extremely useful for faculty members if they want to set problem for lab exam final exam.

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|20:56
| whatever it is and you can do this for all kinds of application

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|21:01
| ofcourse it will help you to identify example for the command that you want to find