Are spotty fruits and vegetables safe to eat? - Elizabeth Brauer

source: TED-Ed    2016年8月22日
View full lesson: http://ed.ted.com/lessons/are-spotty-...
In 2010, 30 billion dollars worth of fruits and vegetables were wasted by American retailers and shoppers, in part because of cosmetic problems and perceived spoilage. But what are these spots, anyway, and are they okay to eat? Elizabeth Brauer explains why you may not need to be afraid of picking up your grocery store’s funky-looking fruit.
Lesson by Elizabeth Brauer, animation by TED-Ed.

Communication Engineering by Surendra Prasad (IIT Delhi)

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

source: nptelhrd    2013年9月15日
Electrical - Communication Engineering by Prof. Surendra Prasad, Department of Electrical Engineering, IIT Delhi. For more details on NPTEL visit http://nptel.iitm.ac.in

Lecture - 1 Introduction to Communication Engineering 56:25
Lecture - 2 Communication channel 57:54
Lecture - 3 Brief Review of Signal and Systems 52:29
Lecture - 4 The Hilbert Transform 48:29
Lecture - 5 Analytic Representation of bandpass Signals 54:35
Lecture -6 Fundamentals of Analog Signal Transmission 51:30
Lecture - 7 Analog Modulation of Carriers 51:25
Lecture - 8 Amplitude Modulation 54:42
Lecture - 9 Amplitude Modulation contd 49:58
Lecture - 10 Single SideBand Modulation 48:53
Lecture -11 Suppressed SideBand Modulation 56:24
Lecture - 12 VSB Modulation - Superhet Receiver 52:07
Lecture -13 Superhet Receiver etc 49:41
Lecture-14 Practical Mixers-Effects of Tonal 57:29
Lecture - 15 Angle Modulation 49:38
Lecture -16 Angle Modulation 53:42
Lecture - 17 Generation of FM Signals 53:28
Lecture -18 FM Generation and Detection 52:02
Lecture - 19 Demodulation of Angle Modulated Signals 52:10
Lecture - 20 Demodulation of Angle Modulated Signals 53:56
Lecture - 21 Demodulation of Angle Modulated Signals 49:46
Lecture -22 FeedBack Demodulators - phase locked loop 53:01
Lecture - 23 The Phase Locked Loop 54:35
Lecture - 24 Frequency Compressive FeedBack Demodulator 53:10
Lecture - 25 FM Receivers 54:53
Lecture - 26 TV Transmission 58:12
Lecture - 27 Review of Probability Theory and Random Process 54:48
Lecture-28 Review of Probability Theory and Random Variables 51:37
Lecture -29 Random Processes 55:19
Lecture -30 Random Processes 54:58
Lecture - 31 Random Processes 50:55
Lecture - 32 Gaussian Random Processes 47:12
Lecture - 33 Behaviour of Communication System 54:43
Lecture - 34 Performance of AM Systems in Noise 57:33
Lecture -35 Noise in AM and Angle Modulation Systems 54:47
Lecture - 36 Noise in Phase and Frequency Modulation systems 49:51
Lecture - 37 Noise in Angle Modulation 52:41
Lecture - 38 Pre emphasis - De emphasis 50:23
Lecture - 39 Pulse Modulation Schemes - PWM and PPM 53:48
Lecture - 40 Data Modulation 52:05
Lecture - 41 Pulse Code Modulation 58:18

Scientists show that dogs were domesticated twice

source: University of Oxford    2016年6月3日
The question, ‘Where do domestic dogs come from?’, has vexed scholars for a very long time. Some argue that humans first domesticated wolves in Europe, while others claim this happened in Central Asia or China. A new paper, published in Science, suggests that all these claims may be right. Supported by funding from the European Research Council and the Natural Environment Research Council, a large international team of scientists compared genetic data with existing archaeological evidence and show that man’s best friend may have emerged independently from two separate (possibly now extinct) wolf populations that lived on opposite sides of the Eurasian continent. This means that dogs may have been domesticated not once, as widely believed, but twice.

Becoming Darwin: History, Memory, and Biography, "Economist of Nature"

source: Yale University    2015年11月6日
2015 Yale University Dwight H. Terry Lectures delivered by Janet Browne, Aramont Professor of the History of Science, Harvard University. Becoming Darwin: History, Memory, and Biography: November 3, 2015 - Economist of Nature

Janet Browne is Aramont professor of the History of Science at Harvard University where she teaches the history of biology, including the history of evolutionary theory. Her interests range widely over the life sciences, botany, the history of gardens, collecting, expeditions, museums, and natural history.

Guidelines for Future Remote Viewing with Joseph McMoneagle

source: New Thinking Allowed     2016年7月28日
Joseph McMoneagle is a world-renowned remote viewer who has worked professionally in the field for almost four decades – both within the military and as a private contractor. He is author of Mind Trek, The Ultimate Time Machine, The Stargate Chronicles: Memoirs of a Psychic Spy, and Remote Viewing Secrets. He is also coauthor of ESP Wars: East and West. He is the recipient of a congressional Legion of Merit Award for his remote viewing work within the U.S. government military intelligence services.
Here he encourages everyone to read the research literature in the field. He emphasizes that, while authentic skeptics can be helpful, it is usually a waste of time to interact with those who are mere “scoffers”. He also points out that one must have an appreciation for statistical evaluation of the results – just as one would for professional athletes who are never successful 100 percent of the time. He does not particularly recommend remote viewing training courses, and states that mostly one must unlearn bad habits that interfere with successful results.

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 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 12, 2016)

Tackling the "Meaning Crisis": Mental Chaos in University Students

source: Jordan B Peterson     2016年7月20日
https://www.facebook.com/drjordanpete...
https://twitter.com/jordanbpeterson
This talk was organized by Blu Matter Project, a University of Toronto student group dedicated to student mental health. The organizers of this event sent me the following statement:

"Many university students' core beliefs and ideas are challenged by the courses they take, with no meaningful and beneficial replacements being proposed. This creates a devastating problem for many students. They experience a crisis of meaning, and no longer know or can't tell what they should pursue in life. This existential undermining adds to the stress students experience while attempting to maintain a good GPA and manage demanding courses. All of this can produce depression, and encourage a nihilistic outlook."
This discussion addresses such issues.

Engineering Physics I (IIT Roorkee)

# playlist of the 40 videos (click the up-left corner of the video)

source: nptelhrd    2014年7月21日
Engineering Physics I by Prof. G. D. Verma, Prof. M. K. Srivastava, Prof. B. K. Patra & Prof. Rajdeep Chatterjee, Department of physics, IIT Roorkee. For more details on NPTEL visit http://nptel.ac.in

Mod-01 Lec-01 Introduction 30:32
Mod-01 Lec-02 Malus law & Superposition of ways 29:54
Mod-01 Lec-03 Double Refraction 40:22
Mod-01 Lec-04 Interference of polarized light 37:48
Mod-01 Lec-05 Optical Activity 33:51
Mod-02 Lec-01 Introduction. 34:53
Mod-02 Lec-02 Stationary Waves & Reflection, Refraction and Diffraction 35:46
Mod-02 Lec-03 Ultrasonics 34:22
Mod-02 Lec-04 Acoustics of Buildings - Part I 28:34
Mod-02 Lec-05 Acoustics of Buildings - Part II 33:36
Mod-03 Lec-01 Interference of light Part-1 48:20
Mod-03 Lec-02 Interference of light Part-2 53:02
Mod-03 Lec-03 Interference of light Part-3 30:35
Mod-03 Lec-04 Interference by Division of Wave front 25:12
Mod-03 Lec-05 Interference by Division of Amplitude 32:35
Mod-03 Lec-06 Coherence and Application of Interference 26:17
Mod-04 Lec-01 Diffraction Part-01 41:38
Mod-04 Lec-02 Diffraction Part-02 53:36
Mod-04 Lec-03 Diffraction Part-03 36:53
Mod-04 Lec-04 Diffraction by a circular aperture 33:15
Mod-05 Lec-01 Kinetic theory of gases- part 01 40:00
Mod-05 Lec-02 Kinetic theory of gases- part 02 29:57
Mod-05 Lec-03 Maxwellian distribution law of velocity -part 01 42:04
Mod-05 Lec-04 Maxwellian distribution law of velocity -part 02 43:51
Mod-05 Lec-05 Maxwellian distribution law of velocity -part 03 23:32
Mod-05 Lec-06 Vanderwaal\'s equation of states-part01 39:55
Mod-05 Lec-07 Vanderwaal\'s equation of states-part02 39:48
Mod-05 Lec-08 Vanderwaal\'s equation of states-part03 42:51
Mod-06 Lec-01 Fluid Mechanics-part01 46:02
Mod-06 Lec-02 Fluid Mechanics-part02 34:25
Mod-07 Lec-01 Introduction of special relativity 50:47
Mod-07 Lec-02 Consequences of special relativity-1 46:24
Mod-07 Lec-03 Consequences of special relativity-2 49:44
Mod-07 Lec-04 Consequences of special relativity-3 43:56
Mod-07 Lec-05 Consequences of special relativity-4 53:34
Mod-07 Lec-06 Consequences of special relativity-5 42:00
Mod-08 Lec-01 Introduction.. 45:28
Mod-08 Lec-02 Image formation by lenses 39:25
Mod-08 Lec-03 Lens aberrations - Part I 24:04
Mod-08 Lec-04 Lens aberrations - Part II 29:15

D. K. Dwivedi: Welding Engineering (IIT Roorkee)

# playlist of the 40 videos (click the up-left corner of the video)

source: nptelhrd     2014年3月5日
Mechanical - Welding Engineering by Dr. D. K. Dwivedi, Department of Mechanical Engineering, IIT Roorkee. For more details on NPTEL visit http://nptel.ac.in

Mod-01 Lec-01 Introduction to Welding Engineering 1:27:44
Mod-01 Lec-02 Classification of Welding Processes- I 1:02:31
Mod-01 Lec-03 Classification of Welding Processes- II 56:44
Mod-01 Lec-04 Sources of Heat and Protection of Weld pool 58:07
Mod-01 Lec-05 Protection of Weld Pool 49:15
Mod-02 Lec-01 Introduction 47:19
Mod-02 Lec-02 Fundamentals of Arc Initiation 45:30
Mod-02 Lec-03 Arc Maintenance & Arc Characteristics 46:46
Mod-02 Lec-04 Arc Forces 50:04
Mod-02 Lec-05 Arc Efficiency 56:52
Mod-02 Lec-06 Metal Transfer and Melting Rate 50:18
Mod-03 Lec-01 Types of power sources and their characteristics- I 51:47
Mod-03 Lec-02 Types of power sources and their characteristics- II 47:34
Mod-04 Lec-02 SMAW- II 52:22
Mod-04 Lec-03 GTAW- I 52:55
Mod-04 Lec-04 GTAW- II 51:06
Mod-04 Lec-01 SMAW- I 51:00
Mod-04 Lec-05 PAW & SAW 58:04
Mod-04 Lec-06 SAW 48:49
Mod-04 Lec-07 GMAW 51:42
Mod-04 Lec-08 Brazing, Soldering & Braze Welding 43:04
Mod-04 Lec-09 Braze welding and Electroslag welding 47:47
Mod-05 Lec-01 Weld Thermal Cycle 52:32
Mod-05 Lec-02 Effect of WTC and Cooling rate in welding 51:50
Mod-05 Lec-03 Cooling rate 49:38
Mod-05 Lec-04 Peak temperature & Solidification rate 50:46
Mod-05 Lec-05 Residual stress- I 49:07
Mod-05 Lec-06 Residual stress- II 46:47
Mod-06 Lec-01 Introduction 48:00
Mod-06 Lec-02 Type of joints and welds 55:57
Mod-06 Lec-03 Edge preparation 52:20
Mod-06 Lec-04 Design for static and fatigue loading 1:07:24
Mod-06 Lec-05 Fatigue fracture of weld joints- I 54:13
Mod-06 Lec-06 Fatigue fracture of weld joints- II 58:40
Mod-07 Lec-01 Introduction 57:55
Mod-07 Lec-02 DT & NDT 55:22
Mod-08 Lec-01 Understanding Weldability 51:50
Mod-08 Lec-02 Reactions in weldment 54:28
Mod-08 Lec-03 Weldability of Al alloys 49:50
Mod-08 Lec-04 Failure analysis and prevention 1:00:33

Hilary Putnam on Science & Externalism

source: Philosophical Overdose    2013年6月18日
In this talk, Hilary Putnam discusses semantic externalism and related issues within the philosophy of science and epistemology.

Religion and the Practice of American Parenting

source: Yale University    2015年1月12日
We live in an age where there seems to be no higher moral imperatives than those associated with parenting. At the same time that there has been a decline in religious orthodoxy, the expectations of what it means to be a parent have become more orthodox. Not that more parents are religious, but that more people treat parenting religiously. This talk explores how this came to be, arguing that parenting is usefully understood through the interdisciplinary matrix of religious studies.

Kathryn Lofton, Sarai Ribicoff Associate Professor of Religious Studies and American Studies, spoke on February 19, 2013.

Gambling: Getting the Balance Right | Philip Graf CBE | RSA Replay

source: The RSA    2016年7月19日
Gambling: Getting the Balance Right with Philip Graf CBE. What are the key current and future challenges facing the gambling industry – and for the politicians and regulators seeking to protect the consumer? Philip Graf is coming to the end of five years as Chair of the Gambling Commission. At the RSA, he discusses the role of the Commission, the changing nature of gambling regulation and the challenges which continue to face both politicians and regulators in seeking to get this balance right.

Philip Graf CBE - Chair of the Gambling Commission
Matthew Taylor - Chief Executive, the RSA

Emi Hariyama: "The Art of Ballet" | Talks at Google

source: Talks at Google    2016年7月18日
Emi Hariyama is an award winning ballerina who graduated from the Bolshoi Ballet School in Moscow, and has performed across Russia, Asia, Europe and America. Emi talks about the beauty of ballet, her work as a dancer/ performer/artist, and challenges faced as a ballerina abroad.

Forgotten Thinkers: Al-Ghazali and Averroes by Wesley Cecil

source: Wes Cecil    2016年2月19日
A lecture delivered by Wesley Cecil PhD. at Peninsula College. Explores the Islamic Golden Age, Translation Movement, and the work of Al-Ghazali and Averroes.
I apologize if my speech is in-distinct at times, I was quite sick when delivering this lecture - perhaps should be titled "The Incoherence of Me." Also note, Grand Ayatollah Ali Al-Sistani's website is still active.

Energy Resources and Technology by S. Banerjee (IIT Kharagpur)

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

source: nptelhrd    2008年10月23日
Electrical - Energy Resources and Technology by Prof. S. Banerjee, Department of Electrical Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in.

Lecture - 1 Thermodynamics : The Fundamentals Of Energy 50:42
Lecture - 2 Quality of Energy 59:15
Lecture - 3 Complete Cycle Analysis of Fossil Fuels 50:59
Lecture - 4 Energy in Transportation 54:29
Lecture - 5 Other Fossil Fuels 54:09
Lecture - 6 Energy Economics : Input-Output Analysis 54:23
Lecture - 7 Energy Economics : Input-Output Analysis 55:35
Lecture - 8 Thermal Power Plants 52:50
Lecture - 9 Thermal Power Plants 54:41
Lecture - 10 Hydroelectric Power 54:18
Lecture - 11 Hydroelectric Power 55:53
Lecture - 12 Nuclear Power Generation 48:27
Lecture - 13 Nuclear Fusion Reactors 50:35
Lecture - 14 Environmental Effects of Conventional Power 54:20
Lecture - 15 Solar Thermal Energy Conversion 57:13
Lecture - 16 Solar Concentrating Collectors 53:52
Lecture - 17 Photovoltaic Power Generation 56:37
Lecture - 18 Photovoltaic Power Generation Contd. 50:39
Lecture - 19 Photovoltaic Power Generation Contd. 53:26
Lecture - 20 Photovoltaic Power Generation Contd 56:35
Lecture - 21 Wind Energy I 56:34
Lecture - 22 Wind Energy II 56:34
Lecture - 23 Wind Energy - III 59:59
Lecture - 24 Wind Energy - IV 54:23
Lecture - 25 Wind Energy - V 55:35
Lecture - 26 Wind Energy - VI 59:43
Lecture - 27 Wind Electrical Conversion - I 58:36
Lecture - 28 Wind Electrical Conversion - II 54:56
Lecture - 29 Wind Electrical Conversion - III 56:15
Lecture - 30 Tidal Energy 59:58
Lecture - 31 Tidal Energy 48:09
Lecture - 32 Tidal Energy 53:03
Lecture - 33 Ocean Thermal Energy Conversion 1:04:18
Lecture - 34 Solar Pond and Wave Power 54:13
Lecture - 35 Geothermal Energy 59:08
Lecture - 36 Solar Distillation and Biomass Energy 50:08
Lecture - 37 Energy Storage 55:59
Lecture - 38 Magnetohydrodynamic Power Generation 55:49
Lecture - 39 Magnetohydrodynamic Power Generation 55:50
Lecture - 40 Hydrogen Economy 54:59