How do contraceptives work? - NWHunter

source: TED-Ed     2016年9月19日
View full lesson: http://ed.ted.com/lessons/how-do-cont...
Contraceptives are designed to prevent pregnancy in three basic ways: they either block sperm, disable sperm before they reach the uterus, or suppress ovulation. But is one strategy better than the other? And how does each one work? NWHunter describes the mechanics behind different kinds of contraceptives.
Lesson by NWHunter, animation by Draško Ivezić.

Roger Moore: Fluids and Waves / U of Alberta

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

source: Roger Moore     2013年12月23日
PHYS 146: Fluids and Waves at the University of Alberta. For the iBook on the course go to:
https://itunes.apple.com/us/book/flui...

Elasticity part 1: Stress and Strain This lecture introduces the concept of elasticity and covers the definitions of different types of mechanical stress and strain. 32:23
Elasticity part 2: Young's Modulus 36:45
Elasticity part 3: Moduli of Elasticity 22:40
Elasticity part 4: Elastic Limits 20:19
Fluid Statics, part 1: Pressure and Density 12:33
Fluid Statics part 2: Static Pressure 26:15
Fluid Statics, part 3: Pressure Gauges 18:41
Fluid Statics, part 4: Buoyancy 19:32
Fluid Dynamics, part 1: Fluid Flow 14:57
Fluid Dynamics, part 2: Bernoulli's Equation 25:54
Fluid Dynamics, part 3: Viscosity 16:10
Oscillations Part 1: Derivation of Simple Harmonic Motion 26:01
Oscillations Part 2: SHM Parameters 17:24
Oscillations Part 3: Phasors 28:29
Oscillations Part 4: Kinematics and Energy 30:58
Oscillations Part 5: Pendulums 26:50
Oscillations Part 6: Damped Oscillators 34:16
Oscillations Part 7: Driven Oscillators 17:53
Oscillations Part 8: Resonance 31:56
Waves part 1: Wave Types and Properties 25:28
Waves part 2: The Wave Equation 17:51
Waves part 3: Solving the Wave Equation 26:01
Waves part 4: Waves on a String 29:10
Waves part 5: Acoustic Waves 20:47
Waves part 6: Wave Intensity 13:10
Waves part 7: Superposition 26:04
Waves part 8: Interference 29:41
Waves part 9: Standing Waves 36:37
Waves part 10: The Doppler Effect 25:57
Light Waves part 1: Reflection and Refraction 32:45
Light Waves part 2: Lenses 30:32
Light Waves part 3: The Lens Equation 24:43
Light Waves part 4: Dispersion 32:58
Light Waves part 5: Polarization 22:26
Light Waves part 6: Interference 36:25
Light Waves part 7: Diffraction at Slits 34:49
Light Waves part 8: Diffraction Grating 24:07

The Nature of Psi with Vernon Neppe

source: New Thinking Allowed    2016年5月5日
Vernon Neppe, MD, PhD, FRSSAf, is a neuropsychiatrist and head of the Pacific Neuropsychiatric Institute in Seattle. He is a former president of the South African Society for Psychical Research. He is author, with physicist Edward Close, of Reality Begins with Consciousness: A Paradigm Shift that Works, and author of Déjà Vu Revisited, Déjà Vu: A Second Look, Déjà Vu: Glossary and Library, Cry the Beloved Mind: A Voyage of Hope, and Innovative Psychopharmacotherapy. His professional publications number over 700. Dr Neppe has amplified many of his concepts in two of the websites linked with his work. On www.Brainvoyage.com, his books are amplified. www.VernonNeppe.org is his gateway and includes more information on the Neppe-Close model of the Triadic Distinction Vortical Paradigm.
Here, Dr. Neppe describes areas of psi research that have all achieved statistical significance at the six sigma level. These include remote viewing, random event generator research, the global consciousness project, the ganzfeld studies, studies on the sense of being stared at, and feeling the future studies based on the work of Daryl Bem, presentiment studies. Neppe also includes some research in the area of survival after death. All of this research shows that human consciousness is capable of interacting with the physical world in ways that bypass the normal sensory and motor systems of the body. Neppe presents a single, multi-dimensional model that could account for psi.

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 April 15, 2016)

Science and Religion: Why Does the Debate Continue? (by Alvin Plantinga)

source: Yale University     2014年12月12日
Dwight H. Terry Lectureship September 15, 2006
Alvin Plantinga is a contemporary American philosopher known for his work in epistemology, metaphysics, and the philosophy of religion.
The Dwight H. Terry Lectureship celebrated its 100th anniversary with a two-day conference entitled “The Religion and Science Debate: Why Does It Continue?” Public Broadcasting System journalist Margaret Warner moderated the closing panel of the two-day symposium.
A book based on the conference, The Religion and Science Debate: Why Does It Continue? is available from Yale University Press.

TELEHEALTH: How New Technologies Are Transforming Health Care

source: Harvard University     2015年5月18日
Telehealth combines telecommunications and health systems to deliver care and support across distances. However, this simple definition belies the complexity of this rapidly evolving field. A cadre of increasingly sophisticated technologies — matched with a need to reduce healthcare costs, serve more patients, and improve quality — drives the field in both high-income and low-income countries. Panelists in this Forum event examined aspects of telehealth in the U.S., including doctor and patient buy-in and the impact of the Affordable Care Act, and in other high-income countries. They also took a look at the role of telehealth in low-income countries, where technologies such as mobile phones can serve as vital tools for healthcare workers to ensure and evaluate standards of care in the diagnosis and treatment of common illnesses.

Part of The Dr. Lawrence H. and Roberta Cohn Forums, this webcast was presented May 15, 2015 in collaboration with The Huffington Post.
Watch the entire series from The Forum at Harvard T.H. Chan School of Public Health at www.ForumHSPH.org.
Image Credit: ©iStock.com/feellife

Why Can't Mules Have Babies?

source: MinuteEarth     2016年8月23日
Thanks to The Great Courses Plus for sponsoring this video. You can start your subscription with a free one-month trial today by visiting http://ow.ly/Yq7c302duah
Hybrid animals are infertile because of the way their sex cells form. But sometimes, life finds a way.

FYI: We try to leave jargon out of our videos, but if you want to learn more about this topic, here are some handy keywords to get your googling started:
- Hybrid organisms: The offspring of two animals or plants of different breeds, varieties, species or genera.
- Mitosis: A process of cell division that produces copies of the original cell.
- Meiosis: A process of cell dividion that produces new daughter cells with half the chromosome number of the original cell.
- Sex cell, or gamete: a cell that fuses with another cell during fertilization (conception) in organisms that sexually reproduce.
- Hemiclonal transmission: The rare occurence in which only maternal DNA gets passed along during the creation of sex cells.

Species featured in this video:
- Mule, is the offspring of a male donkey (jack) and a female horse (mare)
- Liger, is a hybrid cross between a male lion (Panthera leo) and a female tiger (Panthera tigris)
- Zonkey, is the offspring of a zebra and a donkey. Zebra hybrids are generally known as zebroids
- Beefalo, also known as cattalo, is the offspring of a domestic cattle (Bos taurus) and an American buffalo (Bison bison)
- Cama, is the offspring of a male dromedary camel and a female llama.

Erich Fromm: The Automaton Citizen and Human Rights (1-3)

source: Eidos84      2010年12月11日
Erich Fromm lectures on 'The Automaton Citizen and Human Rights', at the American Orthopsychiatric Association (1966). Fromm discusses the importance of psychiatry and clinical psychology in examining the individual's experience of alienation in modern consumer society. For Fromm, alienation is fundamentally opposed to the basic human right 'to be one's self'. As regards psychology, Fromm claims 'that the psychiatrist and the clinical psychologist have an important task - that is, not to be over-impressed by individual sickness but to think of man as a total being, and of applying their basic findings to the pathology of normalcy which threatens to undermine the very rights which we are so proud of having achieved.'

Bertrand Russell & Wittgenstein on Belief & Relations (by Fraser MacBride)

source: Philosophical Overdose    2015年5月16日
After a brief discussion of the nature of philosophy and the origins of analytic philosophy, Fraser MacBride discusses Bertrand Russell and Ludwig Wittgenstein on the nature of relations and the structure of judgment or belief, how our thought relates to external objects in the world. Among the topics discussed include metaphilosophy and the history of analytic philosophy, F. H. Bradley's infamous regress argument against the reality of relations, Russell's correspondence theory of truth and different accounts of judgment including his famous multiple relation theory.
"The question of relations is one of the most important that arise in philosophy, as most other issues turn on it: monism and pluralism; the question of whether anything is wholly true except the whole of truth, or wholly real except the whole of reality; idealism and realism, in some of their forms; perhaps the very existence of philosophy as a subject distinct from science and possessing a method of its own.” Bertrand Russell

Sleep Deprivation & Sleep Disorders: An unmet public health need

source: Oxford Martin    2016年7月28日
Recent basic biological findings about sleep and circadian rhythm are underpinning a growing interest in the relevance of sleep loss. New strategies are emerging to deal with common sleep disorders. Allan I. Pack, Professor of Medicine at the University of Pennsylvania, discusses new research in the field.
Sleep and Circadian Neuroscience Institute, Nuffield Department of Clinical Neurosciences, University of Oxford

Place-based Audio Storytelling with Detour

source: Stanford    2016年8月2日
From the Interactive Media & Games Seminar Series; Luisa Beck & Steve Rubin from Detour.com take you behind the scenes of the audio storytelling app Detour. Detour uses your phone to turn audio tours into hour-long stories that unfold as you walk. With authentic narrators and film-quality sound design and scoring, taking a Detour is like walking around inside a movie. Storytellers create Detours using software called Descript. This tool links word processing, mapping, and audio editing features to help a user create and and edit their script, plot their tour's route, and position audio and images throughout the tour.

Jancis Robinson: "The 24-Hour Wine Expert" | Talks at Google

source: Talks at Google    2016年8月10日
Jancis Robinson joined us in London to talk wine and the right things to ask a sommelier next time you are at a restaurant. Recorded in London, July 2016.

About Jancis:
Described by Decanter magazine as 'the most respected wine critic and journalist in the world', Jancis OBE MW writes weekly for the FT & daily for JancisRobinson.com, a wine information site with members in 120 countries. Her most recent book is also her shortest, a practical guide to the essentials of wine, The 24-Hour Wine Expert. She is editor of The Oxford Companion to Wine and co-author of The World Atlas of Wine and Wine Grapes, each of these books is recognised as a standard reference worldwide.
Robinson was born in Cumbria, studied mathematics and philosophy at St Anne's College, University of Oxford and started her wine writing career on 1 December 1975 when she became assistant editor for the trade magazine Wine & Spirit. In 1984, she became the first person outside the wine trade to become a Master of Wine. From 1995 until she resigned in 2010 she served as British Airways' wine consultant, and supervised the BA Concorde cellar luxury selection.
She has an honorary doctorate from the Open University, and was made an OBE in 2003, among numerous other awards for her writing. Some of her accolades include multiple Glenfiddich Awards and André Simon Memorial Awards, and a selection as the Decanter "1999 Woman of the Year". In 2016 she was made an Officier de l'Ordre du Mérite Agricole, was given the German VDP association's highest honour and won for fourth James Beard Award in the US. And there is much, much more!
Read more at jancisrobinson.com

Why You Can’t Choreograph Success | Amy Cuddy

source: Big Think     2016年8月15日
It's tempting to rush success, but Amy Cuddy, professor at Harvard Business School, explains why setting your goals too big can backfire, and vouches for the value of incremental change and authentic learning over the desire to simply 'win'. Cuddy's latest book is "
Presence: Bringing Your Boldest Self to Your Biggest Challenges" (http://goo.gl/sx098n).
Read more at BigThink.com: http://bigthink.com/videos/amy-cuddy-...

Transcript - People make the mistake of making these big goals, these big sort of New Year’s resolutions. And we also know that they often backfire. That, you know, by January 15 a lot of people have given up on their New Year’s resolutions. Why is it that we keep making them and keep failing? Because they’re so big, they’re so distant and they require a million little steps in between. And each of those steps is an opportunity to fail.
And they’re very much outcome focused. It’s not ab out how I’m going to feel, you know, tomorrow. It’s I’m going to lose this much weight. I’m going to get this kind of job. I’m going to become a better public speaker. It’s things like that. I’m going to run a marathon. I think a lot of research is showing us that we do much better when we focus on incremental change, on little bits of improvement. We’re not focused on the outcome. So we’re not focused on the grade or did you get the job or not. And you’re not focused on the, you know, big New Year’s resolution. You’re just focused on the process in this next moment that’s coming up. And that allows you to grow a little bit over time to not think of each of these steps as an opportunity to fail. And eventually, you know, in aggregate you get there. You may not even realize it until one day you turn around and say wow, this thing is much easier for me now than it was a year ago. I think Carol Dweck’s work on growth versus fixed mindsets, to me that’s the most important work around this idea of self-nudging. Carol Dweck’s idea is that when you have kids focus on school tasks not as opportunities to win or fail but as, you know, challenges that will allow them to stretch and grow, that’s a growth mindset. They do much better. You build children who are resilient and strong and actually enjoy school and end up doing well. You build children who thrive. Read Full Transcript Here:http://goo.gl/S7t0Eu.

Ajoy Ghatak: Quantum Mechanics and Application (IIT Delhi)

# playlist of the 42 videos (click the up-left corner of the video)

source: nptelhrd      2012年4月2日
Physics - Quantum Mechanics and Application by Prof. Ajoy Ghatak, Department of Physics, IIT Delhi. For more details on NPTEL visit http://nptel.iitm.ac.in

Mod-06 Lec-20 The Two Body Problem 57:09
Mod-08 Lec-30 Angular Momentum Problem (contd.) 57:45
Mod-06 Lec-19 The Hydrogen Atom Problem 55:14
Mod-08 Lec-29 Angular Momentum Problem using Operator Algebra 55:17
Mod-05 Lec-18 The Angular Momentum Problem (Contd.) 57:04
Mod-07 Lec-28 Coherent State and Relationship with the Classical Oscillator 56:40
Mod-10 Lec-42 Time Independent Perturbation Theory (Contd.2) 57:31
Mod-05 Lec-17 The Angular Momentum Problem 57:53
Mod-07 Lec-27 The Linear Harmonic Oscillator: Coherent State 48:21
Mod-10 Lec-40 Time Independent Perturbation Theory 56:20
Mod-09 Lec-35 The JWKB Approximation 57:33
Mod-03 Lec-10 Linear Harmonic Oscillator 1:00:26
Mod-07 Lec-25 Dirac's Bra and Ket Algebra : The Linear Harmonic Oscillator 56:19
Mod-02 Lec-05 Physical Interpretation of The Wave Function 58:06
Mod-04 Lec-15 The 1-Dimensional Potential Wall & Particle in a Box 56:00
Mod-09 Lec-39 The JWKB Approximation: Justification of the Connection Formulae 58:21
Mod-08 Lec-34 Clebsch Gordon Coefficients 56:44
Mod-07 Lec-24 Dirac's Bra and Ket Algebra 56:40
Mod-02 Lec-09 On Eigen Values and Eigen Functions of the 1 Dimensional.., 59:39
Mod-02 Lec-04 The Free Particle 50:24
Mod-04 Lec-14 Tunneling through a Barrier 57:04
Mod-09 Lec-38 The JWKB Approximation: Tunneling Probability Calculations and Applications. 59:05
Mod-08 Lec-33 Addition of Angular Momentum: Clebsch Gordon Coefficient 58:27
Mod-06 Lec-23 3d Oscillator & Dirac's Bra and Ket Algebra 56:17
Mod-02 Lec-08 Interference Experiment & The Particle in a Box Problem 57:39
Mod-01 Lec-03 Dirac Delta Function & Fourier Transforms 58:17
Mod-03 Lec-13 Linear Harmonic Oscillator (Contd. 3) 58:54
Mod-09 Lec-37 The JWKB Approximation: Use of Connection Formulae 56:51
Mod-08 Lec-32 The Larmor Precession and NMR Spherical Harmonics using Operator Algebra 57:24
Mod-06 Lec-22 Two Body Problem: The Diatomic molecule (contd.) 55:49
Mod-02 Lec-07 The Free Particle (Contd.) 56:36
Mod-01 Lec-02 Basic Quantum Mechanics II: The Schrodinger Equation 58:59
Mod-03 Lec-12 Linear Harmonic Oscillator (Contd 2.) 55:28
Mod-10 Lec-41 Time Independent Perturbation Theory (Contd.1) 59:26
Mod-09 Lec-36 The JWKB Approximation: Use of Connection Formulae to solve Eigen value Prob 56:43
Mod-08 Lec-31 Pauli Spin Matrices and The Stern Gerlach Experiment 55:09
Mod-07 Lec-26 The Linear Harmonic Oscillator using Bra and Ket Algebra (contd.) 56:10
Mod-06 Lec-21 The Two Body Problem: The Hydrogen atom, The Deutron 56:15
Mod-04 Lec-16 Particle in a Box and Density of States 54:37
Mod-03 Lec-11 Linear Harmonic Oscillator (Contd 1.) 51:06
Mod-02 Lec-06 Expectation Values & The Uncertainty Principle 1:00:03
Mod-01 Lec-01 Basic Quantum Mechanics I: Wave Particle Duality 54:32

Combinatorics by L. Sunil Chandran (IISc Bangalore)

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

source: nptelhrd   2014年1月6日
Computer Science - Combinatorics by Dr. L. Sunil Chandran, Department of Computer Science and Engineering, IISc Bangalore. For more details on NPTEL visit http://nptel.ac.in

01 Pigeon hole principle - (Part 1) 58:16
02 Pigeon hole principle - (Part 2) 58:04
03 Pigeon hole principle - (Part 3) 59:23
04 Pigeon hole principle - (Part 4) 59:10
05 Elementary concepts and basic counting principles 57:36
06 Elementary concepts; Binomial theorem; Bijective proofs - Part (1) 59:01
07 Bijective proofs -- Part (2) 58:17
08 Bijective proofs - Part (3); Properties of binomial coefficients; 59:22
09 Combinatorial identities - Part (2); Permutations of multisets -- Part (1) 59:10
10 Permutations of multisets -- Part (2) 59:04
11 Multinomial Theorem, Combinations of Multisets -- Part (1) 57:13
12 Combinations of Multisets - Part (2) 56:37
13 Combinations of Multisets -- Part (3), Bounds for binomial coefficients 1:01:06
14 Sterling's Formula, Generalization of Binomial coefficients - Part (1) 58:27
15 Generalization of Binomial coefficients - Part (2) 57:46
16 Generalization of Binomial coefficients - Part (3); Double counting - Part (1) 59:24
17 Double counting - Part (2) 58:40
18 Hall's Theorem for regular bipartite graphs; Inclusion exclusion principle - Part (1) 59:21
19 Inclusion exclusion principle - Part (2) 59:23
20 Inclusion exclusion principle - Part (3) 57:34
21 Inclusion exclusion principle - Part (4) 59:24
22 Inclusion exclusion principle - Part (5) 58:37
23 Recurrence Relations - Part (1) 58:19
24 Recurrence Relations - Part (2) 56:12
25 Recurrence Relations - Part (3) 58:29
26 Recurrence Relations - Part (4) 58:29
27 Recurrence Relations - Part (5) 58:50
28 Generating functions - Part (1) 59:11
29 Generating functions - Part (2) 59:24
30 Solving recurrence relations using generating functions - Part (1) 59:12
31 Solving recurrence relations using generating functions - Part (2) 59:59
32 Exponential generating functions - Part (1) 59:04
33 Exponential generating functions - Part (2), Partition Number - Part (1) 57:18
34 Partition Number - Part (2) 58:30
35 Partition Number - Part (3) 56:52
36 Partition Number - Part (4); Catalan Numbers - Part (1) 58:03
37 Catalans Numbers - Part (2) 57:52
38 Catalan Numbers - Part (3), Sterling numbers of the 2nd kind 58:35
39 Difference Sequences 59:04
40 Sterling Numbers 59:16
41 Summary 18:08

Software Engineering by N. L. Sarda & Umesh Bellur (IIT Bombay)

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

source: nptelhrd   2008年10月8日
Computer Sc - Software Engineering by Prof. N. L. Sarda, Prof. Umesh Bellur, Department of Computer Science & Engineering, IIT Bombay.

Lecture - 1 Introduction to Software Engineering 52:21
Lecture - 2 Introduction to Software Engineering 52:56
Lecture-3 Overview of Phases 57:22
Lecture - 4 Overview of Phases 57:03
Lecture -5 Requirements Engineering / Specification 56:39
Lecture - 6 Formal Specification 51:44
Lecture - 7 Algebraic Specification Methods 57:34
Lecture - 8 Systems Modelling Overview 59:38
lecture - 9 Process Modelling - DFD , Function Decomp 56:28
Lecture - 10 Process Modelling - DFD, Function Decomp 53:23
Lecture - 11 Data Modelling - ER Diagrams, Mapping 1:00:55
Lecture - 12 Data Modelling - ER Diagrams, Mapping 58:08
Lecture -13 Production Quality Software - Introduction 53:04
Lecture - 14 Software Design - Primary Consideration 1:04:43
Lecture - 15 Design Patterns 56:13
Lecture - 16 Class and Component Level Design 54:34
Lecture - 17 Architectural Design 59:28
Lecture - 18 Software Testing - I 55:39
Lecture - 19 Software Testing - II 51:18
Lecture - 20 Structural Programming and Some implementation 45:06
Lecture - 21 Software Metrics and Quality 54:51
Lecture - 22 Verification and Validation 52:44
Lecture - 23 Case Study 54:55
Lecture - 24 Case Study 58:39
Lecture - 25 Software Evolution 55:41
Lecture - 26 Agile Development 55:31
Lecture - 27 Software Reuse 53:43
Lecture - 28 Reuse Continued 57:07
Lecture - 29 Introduction to Project Management 52:36
Lecture - 30 Project Scope Management 1:08:46
Lecture - 31 Project Time Management 56:51
Lecture - 32 Estimation - I 51:42
Lecture - 33 Estimation - II 50:38
Lecture - 34 Project Quality Management 58:32
Lecture - 35 Quality Management Systems - I 54:43
Lecture - 36 Quality Management Systems 54:53
Lecture - 37 Project Configuration Management 53:00
Lecture - 38 Project Risk Management 56:05
Lecture - 39 Other PM Processes 55:41