How the Königsberg bridge problem changed mathematics - Dan Van der Vieren

source: TED-Ed     2016年9月1日
View full lesson: http://ed.ted.com/lessons/how-the-kon...
You’d have a hard time finding the medieval city Königsberg on any modern maps, but one particular quirk in its geography has made it one of the most famous cities in mathematics. Dan Van der Vieren explains how grappling with Königsberg’s puzzling seven bridges led famous mathematician Leonhard Euler to invent a new field of mathematics.
Lesson by Dan Van der Vieren, animation by Artrake Studio.

Putnam's Critique of the Fact/Value Dichotomy

source: Philosophical Overdose    2016年7月31日
Professor Hilary Putnam gives a lecture titled "The fact/value dichotomy and its critics" at UCD in March 2007. The question "Is that supposed to be a fact or a value judgment?" is a familiar one that arises in everyday life. The presupposition seems to be that if something is a value judgment, then it cannot possibly be a statement of fact, and that value judgments are merely subjective. But is this right? Putnam attacks this dichotomy, arguing that we have no clear unproblematic notion of "fact", and that facts and values are essentially entangled with one another, even within science. He draws on the work of people like Quine with his attack on the analytic-synthetic distinction to help make his case. The fact-value dichotomy was crucial for the logical positivists and such emotivist approaches to ethics, making values and morals non-cognitive and outside the sphere of rationality altogether. Putnam argues that the dichotomy has also been culturally influential and has had an impact on society with various economic and social policies.
Hilary Putnam (1926-2016) was an American philosopher, mathematician, and computer scientist who was a central figure in analytic philosophy. He made important contributions in many areas, including logic, philosophy of mind, philosophy of language, epistemology, philosophy of science, and mathematics.
Putnam's "Reason, Truth, and History" is a great work and has a few chapters which deal with these issues on rationality and the fact-value dichotomy. The book can be found here: https://ia902606.us.archive.org/23/it...
http://www.ucd.ie/news/mar07/030507_P...

Arvind Pattamatta & Ajit K. Kolar: Convective Heat Transfer (IIT Madras)

# playlist of the 44 videos (click the up-left corner of the video)

source: nptelhrd     2014年7月16日
Mechanical - Convective Heat Transfer by Dr. Arvind Pattamatta & Prof. Ajit K. Kolar, Department of Mechanical Engineering, IIT Madras. For more details on NPTEL visit http://nptel.ac.in

01 Introduction to convective heat transfer - Part 1 51:51
02 Introduction to convective heat transfer - Part 2 58:20
03 Continuity Equation 41:40
04 Momentum and Energy Equations 49:51
05 Energy Equation 50:37
06 Reynolds Transport Theorem 51:05
07 Entrophy Generation and streamfunction-vorticity formulation 51:08
08 Couette flow - Part 1 54:47
09 Couette flow - Part 2 50:04
10 Couette flow - Part 3 50:35
11 Boundary layer approximation 50:59
12 Laminar External flow past flat plate (Blasius Similarity Solution) 48:31
13 Numerical solution to the Blasius equation and similarity solution to heat transfer 47:05
14 Pohlhausen similarity solution and flows including pressure gradient (Falkner-Skan) 48:21
15 Falkner skan solutions for heat transfer 46:20
16 Similarity solution for flow and heat transfer with transpiration at walls 49:31
17 Thermal boundary layer in high speed flows 50:23
18 Approximate(Integral) methods for laminar external flow and heat transfer 46:55
19 Integral method for laminar external thermal boundary layer over isothermal surface 46:59
20 Integral method for flows with pressure gradient (von Karman-Pohlhausen method) 51:08
21 Integral method with pressure gradient: heat transfer 44:57
22 Heat transfer across a circular cylinder: Walz approximation 35:50
23 Duhamel's method for varying surface temperature 48:05
24 Laminar External heat transfer with non uniform surface temperature 37:10
25 Laminar internal forced convection - fundamentals 39:52
26 Hydrodynamically and thermally fully developed internal laminar flows 50:06
27 Fully developed laminar internal flow and heat transfer 47:59
28 Shooting method for fully developed heat transfer and thermal entry length problem 49:51
29 Thermal entry length problem with plug velocity profile: Graetz problem 54:10
30 Extended Graetz problem for parabolic velocity profile 45:03
31 Extended Graetz problem 49:59
32 Extended Graetz problem with wall flux boundary condition 51:53
33 Approximate method for laminar internal flows 51:58
34 Integral method for thermal entry length problem 49:06
35 Introduction to Natural Convection Heat Transfer 46:51
36 Similarity Solution in Natural Convection for Vertical isothermal Plate - Part 1 47:19
37 Similarity Solution in Natural Convection for Vertical isothermal Plate - Part 2 47:29
38 Similarity Solution in Natural Convection for Vertical isoflux Plate 48:11
39 Approximate Method in Natural Convection Heat Transfer 46:38
40 Natural Convection in Other Configurations 50:24
41 Turbulent Convective Heat Transfer: RANS Equations - Part 1 49:44
42 Turbulent Convective Heat Transfer: RANS Equations - Part 2 52:09
43 Analogies in Turbulent Convective Heat Transfer - Part 1 50:22
44 Analogies in Turbulent Convective Heat Transfer - Part 1 45:46

M. R. Shenoy: Semiconductor Optoelectronics (IIT Delhi)

# playlist of the 46 videos (click the up-left corner of the video)

source: nptelhrd    2013年10月4日
Physics - Semiconductor Optoelectronics by Prof. M. R. Shenoy, Department of Physics, IIT Delhi. For more details on NPTEL visit http://nptel.iitm.ac.in

Mod-01 Lec-01 Context and Scope of the Course 52:27
Mod-01 Lec-02 Energy Bands in Solids 53:25
Mod-01 Lec-03 E-K Diagram 45:48
Mod-01 Lec-04 The Density of States 47:27
Mod-01 Lec-05 The Density of States (contd..) 47:50
Mod-01 Lec-06 The Density of states in a Quantum well Structure 50:52
Mod-01 Lec-07 Occupation Probability and Carrier Concentration 46:02
Mod-01 Lec-08 Carrier Concentration and Fermi Level 48:50
Mod-01 Lec-09 Quasi Fermi Levels 50:22
Mod-01 Lec-10 Semiconductor Materials 45:41
Mod-01 Lec-11 Semiconductor Hetrostructures-Lattice-Matched Layers 50:43
Mod-01 Lec-12 Strained -Layer Epitaxy and Quantum Well Structures 51:09
Mod-01 Lec-13 Bandgap Engineering 53:33
Mod-01 Lec-14 Hetrostructure p-n junctions 49:35
Mod-01 Lec-15 Schottky Junction and Ohmic Contacts 56:21
Mod-01 Lec-16 Fabrication of Heterostructure Devices 59:47
Mod-01 Lec-21 The Semiconductor (Laser) Amplifier 56:33
Mod-02 Lec-17 Interaction od Photons with Electrons and Holes in a Semiconductor 54:32
Mod-02 Lec-18 Optical Joint Density of States 50:26
Mod-02 Lec-19 Rates of Emission and Absorption 50:28
Mod-02 Lec-20 Amplication by Stimulated Emission 42:51
Mod-02 Lec-22 Absorption Spectrum of Semiconductor 55:14
Mod-02 Lec-23 Gain and Absorption Spectrum of Quantum Well Structures 49:59
Mod-02 Lec-24 Electro-absorption Modulator 51:45
Mod-01 Lec-25 Electro-absorption Modulator - II Device Configuration 55:01
Mod-01 Lec-26 Mid-Term Revision Question and Discussion 58:45
Mod-03 Lec-27 Part - III Semiconductor Light Sources 53:11
Mod-03 Lec-28 Light Emitting Diode-I Device Structure and Parameters 51:00
Mod-03 Lec-29 Light Emitting Diode-II Device Characteristics 42:07
Mod-03 Lec-30 Light Emitting Diode-III Output Characteristics 53:45
Mod-03 Lec-31 Light Emitting Diode-IV Modulation Bandwidth 52:20
Mod-03 Lec-32 Light Emitting Diode-V materials and Applications 56:22
Mod-03 Lec-33 Laser Basics 57:02
Mod-03 Lec-34 Semiconductor Laser - I Device Structure 54:16
Mod-03 Lec-35 Semiconductor Laser - II Output Characteristics 54:11
Mod-03 Lec-36 Semiconductor Laser - III Single Frequency Lasers 56:58
Mod-03 Lec-37 Vertical Cavity Surface Emitting Laser (VCSEL) 56:29
Mod-03 Lec-38 Quantum Well Laser 58:32
Mod-03 Lec-39 Practical Laser Diodes and Handling 55:33
Mod-04 Lec-40 General Characteristics of Photodetectors 53:04
Mod-04 Lec-41 Responsivity and Impulse Response 53:54
Mod-04 Lec-42 Photoconductors 56:20
Mod-04 Lec-43 Semiconductor Photo-Diodes 58:04
Mod-04 Lec-44 Semiconductor Photo-Diodes -II : APD 42:55
Mod-04 Lec-45 Other Photodectors 1:06:00
Mod-05 Lec-46 Photonic Integrated Circuits 50:02

丁肇中院士獲頒諾貝爾物理學獎40週年：我所經歷的實驗物理

source: 臺大科學教育發展中心     2016年7月14日
今年是丁肇中院士因發現新型粒子榮獲諾貝爾物理獎40週年，臺大科教中心特地與財團法人張昭鼎紀念基金會、中研院和中央大學，聯合邀請丁肇中院士，在7月3日於臺大給予一場科普演講。
● 講題：我所經歷的實驗物理
● 時間：2016/7/3(日) 14:30-16:30 （13:45開始報到）
● 地點：臺灣大學物理系國際會議廳
● 講師：中央研究院院士兼美國麻省理工學院教授 丁肇中

Technological Apocalypse with Jason Reza Jorjani

source: New Thinking Allowed    2016年8月22日
Jason Reza Jorjani is a philosopher and faculty member at the New Jersey Institute of Technology. He is author of Prometheus and Atlas.
Here he suggests that converging technologies are forcing humanity to reconsider what it means to be human. Biotechnology will enable us to significantly increase human intelligence from generation to generation. In the absence of global regulation, this development could lead to a caste system. In addition, we face the prospect of human cloning and the potential of mixing human genes with those of other species. The fields of artificial intelligence and robotics offer additional possibilities for the creation of bionic species. It may be that our technological advances are outpacing our ability to trust each other to wisely use the new powers that will become available.

New Thinking Allowed host, Jeffrey Mishlove, PhD, is author of The Roots of Consciousness, Psi Development Systems, and The PK Man. Between 1986 and 2002 he hosted and co-produced the original Thinking Allowed public television series. He is the recipient of the only doctoral diploma in "parapsychology" ever awarded by an accredited university (University of California, Berkeley, 1980). He is a past vice-president of the Association for Humanistic Psychology; and is the recipient of the Pathfinder Award from that Association for his contributions to the field of human consciousness exploration. He is also past-president of the non-profit Intuition Network, an organization dedicated to creating a world in which all people are encouraged to cultivate and apply their inner, intuitive abilities.
(Recorded on June 25, 2016)

Jordan Peterson Q&A: Disney Propaganda and Why Bashing Religion Doesn't Make You Smart

source: Jordan B Peterson     2016年7月21日
Donate to develop channel: bit.ly/1VhFPLb
Twitter: https://twitter.com/jordanbpeterson
Facebook: https://www.facebook.com/drjordanpete...
Dr. Peterson responds to viewers' questions live on July 21, 8:30pm Eastern/5:30pm Pacific.
Jordan B. Peterson is a University of Toronto Professor, clinical psychologist, and author of Maps of Meaning.
His two main fields of research are the psychology of belief, including religion, mythology and political ideology; and the assessment and improvement of personality, including the prediction of creativity and academic and industrial performance.
http://jordanbpeterson.com/
https://twitter.com/jordanbpeterson

Nesim Erkip: Analytical Models for Supply Chain (2009)

# click the up-left corner to select videos from the playlist

source: Bilkent Online Courses      2014年8月15日
IE-571 Analytical Models for Supply Chain
2008-2009- Spring
Theoretical and practical issues in the design and management of the supply chain. Logistic network configuration, risk pooling and multi-echelon inventory systems, value of information and bullwhip effect in supply chains, coordination of the supply chain using contracts, distribution strategies and strategic alliances for the supply chain and product design for supply chain efficiency.

01 44:50
02 46:16
03 48:32
04 41:44
05 49:45
06 50:36
07 46:44
08 52:57
09 49:44
10 51:58
11 53:29
12 51:17
13 51:46
14 50:47
15 47:24
16 47:37
17 49:12
18 45:45
19 37:39
20 48:13
21 50:46
22 40:05
23 47:51
24 48:07
25 50:42
26 52:41
27 24:02
28 48:27
29 48:09
30 50:06
31 36:47

Why People Do Bad Things with Tom Gash

source: The RSA    2016年8月1日
Why People Do Bad Things with Tom Gash. What informs our views on crime? Why do myths prevail across the political spectrum? After years of experience working at the heart of government, Tom Gash argues that crime can be less rational and much easier to reduce than many people believe, and that there are small changes that can be made to achieve a dramatic decrease in wrongdoing.
Watch Tom Gash, policy advisor and former Director of Research at the Institute for Government, in our latest RSA Spotlight - the edits which take you straight to the heart of the event! Loved this snippet? Watch the full replay: https://youtu.be/8KO7k5BmhBg
Subscribe to our channel for our next RSA Spotlight!

Michael Puett: "The Path" | Talks at Google

source: Talks at Google     2016年8月1日
For the first time award-winning Harvard professor, Michael Puett shares his wildly popular course on classical Chinese philosophy, showing you how these ancient ideas can guide you on the path to a good life today.
Prof. Puett stopped by our Cambridge office to enlighten us on ways in which we can use teachings from two thousand years ago to live our best lives yet while staying true to our authentic selves.
Why is a course on ancient Chinese philosophers one of the most popular at Harvard?
Get the book here: https://goo.gl/h9mwwy

Increase Your Productivity by Mastering Singular Focus and Mindful Meditation | Emma Seppälä

source: Big Think     2016年7月30日
Emma Seppälä, Ph.D explains the flaws of multitasking, and how meditation can help you achieve mental clarity, increase productivity and even up your levels of charm. Seppälä's is the author of "The Happiness Track: How to Apply the Science of Happiness to Accelerate Your Success" (http://goo.gl/D8Nrsb).
Read more at BigThink.com: http://bigthink.com/videos/emma-seppa...

Transcript - In order to be successful people often think they have to constantly be achieving constantly going from one thing to the next crossing things off of their to do list. But as a consequence they're not in the present moment. And their productivity would be so much greater if they stayed present, as well as their performance on their tasks. What's more is that their relationships would improve drastically. So what research on charisma shows is that highly charismatic people are people who are able to be so fully present with other people and that's what leads to that incredible connection and that influence that they have.
Research shows that our mine actually wanders about 50 percent of the time and research also shows that when our mind is wandering we are never as happy as when our mind is in the present moment. So if your mind in the future worrying about something that's going to happen or in the past because you're regretting something or angry at somebody, you are more likely to feel more negative emotions. But when you're in the present moment, even if you were doing a task you don't particularly like you'll actually feel happier. But also what we know is that you'll be able to be more productive when you're in that state because you're going to naturally be focused.
One way that you can start to bring your mind back into the present, given its tendency to wander, is through breathing exercises and relaxation exercises. If you relax your body your mind will naturally start to settle down and breathing is a very effective way to do that very quickly.
So meditation practices can really help you observe your mind, become aware of its tendencies, for example, its tendency to wander, and help you through that awareness and shift your attention back into the present moment. Meditation is an exercise in which you are engaging fully with the present moment. So it's a fantastic way to train your mind to be more present with what is going on right now. Read Full Transcript Here: http://goo.gl/MibaU9.

Computer Graphics by Sukhendu Das (IIT Madras)

# click the upper-left icon to select videos from the playlist

source: nptelhrd    2008年1月21日
Computer Sc - Computer Graphics by Dr. Sukhendu Das. Dept. of Computer Science and Engineering. IIT Madras.

Lecture - 1 Introduction to computer graphics 54:09
Lecture - 2 CRT Display Devices 54:11
Lecture -3 CRT Devices (Contd...) 53:58
Lecture 4 - CRT display devices (Contd...) 51:55
Lecture - 5 CRT Display Devices (Contd) 58:53
Lecture - 6 Transformations 55:46
Lecture - 7 Transformations in 2D 54:12
Lecure - 8 Three Dimensional Graphics 54:59
Lecture - 9 Three Dimensional Graphics 54:45
Lecture - 10 Three Dimensional Graphics 55:31
Lecture - 11 Project Transformations and Viewing Pipeline 54:02
Lecture - 12 3D Viewing 52:15
Lecture 13 - Scan Converting Lines, Circles and Ellipses 56:12
Lecture 14 Scan Converting Lines, Circles and Ellipses 55:42
Lecture - 15 Scan Converting Lines, Circles and Ellipses 56:05
Lecture 16 Scan Converting Lines, Circles And Ellipses 57:30
Lecture 17 Scan Converting Lines, Circles and Ellipses 54:44
Lecture 18 PolyFill Scan Conversion of a Polygon 54:43
Lecture 19 Scan Conversion Of A Polygon (Contd) 54:59
Lecture 20 Clipping -- Lines And Polygons 54:42
Lecture - 21 Clipping: Lines and Polygon 54:21
Lecture - 22 Clipping Lines 57:05
Lecture - 23 Solid Modelling 57:21
Lecture - 24 Solid Modelling 58:08
lecture 25 - Solid Modelling (contd...) 58:32
Lecture - 26 Visible Surface Detection 56:43
Lecture - 27 Visible Surface Detection 57:51
Lecture - 28 Visible Surface Detection 57:40
Lecture - 29 Visible Surface Detection (Contd..) 56:05
Lecture - 30 Visible Surface Detection (Contd..) 57:32
Lecture - 31 Visible Surface Detection (Contd..) 57:50
Lecture -32 Visible Surface Detection (Contd..) 57:42
Lecture - 33 Illumination and Shading 56:54
Lecture - 34 Illumination and Shading (Contd..) 54:46
Lecture - 35 Illumination and Shading (Contd..) 55:23
Lecture - 36 Curve Representation 56:49
Lecture - 37 Curve Representation 54:27
Lecture - 38 Curves and Surface Representation 52:19
Lecture - 39 Graphics Programming 55:54
Lecture - 40 Graphics Programming Using OpenGL 1:00:24
Lecture - 41 Advanced Topics 57:10
Lecture - 42 Digital Image Processing 1:00:59
Lecture - 43 Digital Image Processing 58:26

Introduction to Computer Graphics by Prem Kalra (IIT Delhi)

# click the upper-left icon to select videos from the playlist

source: nptelhrd   2008年1月24日
Computer Sc - Introduction to Computer Graphics by Prof. Prem Kalra. Department of Computer Science Engineering. IIT Delhi.

Lecture -1 Introduction 49:07
Lecture-2 Raster Graphics 44:25
Lecture - 3 Raster Graphics (Contd.) 46:35
Lecture - 4 Clipping 47:40
Lecture -5 Polygon Clipping and Polygon Scan Conversion 53:48
Lecture - 6 Transformations 54:01
Lecture - 7 Transformations (Contd.) 59:28
Lecture - 8 3D Viewing 53:36
Lecture - 9 3D Viewing (Contd.) 55:00
Lecture - 10 Curves 52:21
Lecture - 11 Assignment 1 35:44
Lecture - 12 Curves 57:39
Lecture - 13 Curves (Contd.) 56:12
Lecture - 14 Curves (Contd.) 43:47
Lecture - 15 Curves (Contd.) 5:50
Lecture - 16 Surfaces 49:04
Lecture - 17 Surface (Contd.) 52:23
Lecture - 18 Surfaces (Contd.) 55:50
Lecture - 19 Surfaces (Contd.) 50:21
Lecture - 20 Hierarchical Models 47:08
Lecture - 21 Rendering 50:56
Lecture - 22 Rendering (Contd.) 52:38
Lecture - 23 Rendering (Contd.) 52:07
Lecture - 24 Ray Tracing 52:17
Lecture - 25 Ray Tracing (Contd.) 45:18
Lecture - 26 Ray Tracing (Contd.) 56:29
Lecture - 27 Assignment: Ray Tracing 55:10
Lec-28 Hidden Surface Elimination 51:56
Lecture -29 Hidden Surface Elimination (Contd.) 59:40
Lec-30 Hidden Surface Elimination(Contd.) 51:52
Lec-31 Fractals 52:13
Lecture - 32 Fractals (Contd.) 57:01
Lecture - 33 Computer Animation 41:00
Lecture - 34 Animation (Contd.) 59:53
Lecture - 35 Animation (Contd.) 46:39