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PSW Science is a leading science education organization in Washington, DC. Founded in 1871 as the Philosophical Society of Washington, PSW Science brings speakers from around the world to present the latest scientific research to the Society’s members and interested members of the public. For almost 150 years, the Society has been a forum for the discussion of the scientific topics of the day, of interest to all educated men and women, and the Society proudly continues that tradition to the present. Membership in the Society is open to anyone interested in science and the purposes of the Society.

PSW Science events - meetings with an invited speaker - generally are held every other Friday from September to May. Meetings are held in the John Wesley Powell Auditorium of the Cosmos Club in Washington, DC. The meetings are open to the public and free of charge. PSW, PSW SCIENCE, and the blue globe logo are registered trademarks of PSW Science.

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PSW #2499 Human Centered AI | Ben Shneiderman
1:55:03
2 месяца назад
PSW 2493 We Have You Surrounded! | Philip DeShong
1:41:03
5 месяцев назад
PSW 2490 Spectroscopy of Deception | Bartek Rajwa
2:19:04
7 месяцев назад
PSW 2486 Self-Driving Cars | Missy Cummings
1:38:36
9 месяцев назад
PSW 2485 Defining Death | Robert Truog
1:31:19
10 месяцев назад
PSW 2481 Hayabusa2 | Yuichi Tsuda
1:56:11
Год назад
PSW 2477 Space Architecture
2:20:38
Год назад
Комментарии
@HumanStructureVideos
@HumanStructureVideos 10 дней назад
JAMA article contradicts the endorsement of treatment for so-called hypertension. See "non-cardiac JAMA Hypertension" article with a sparkling comment by my hero Dr. Steven Yarrows. How this video has only 2.8 thousand views after 6 years of being on RU-vid is a testament to the power of ignorance, the power of big pharma, the power of the MBA's running health care, and the weakness of intelligence and honesty in the USA. Viva FREEDOM OF SPEECH.
@EnneaIsInterested
@EnneaIsInterested 12 дней назад
One of the big post-LBAC shifts is the transition from the Sicilian amber trade, to the Baltic amber trade, probably this is connected to the rise of the Celts and the Germanics, fascinating period in history, the Tollense battle is probably connected to the suddenly-increasing trade bonds post-LBAC between Northern Europe and the Mediterranean.
@faustinemint
@faustinemint 13 дней назад
Very interesting.
@olorin4317
@olorin4317 20 дней назад
Great discussion. We should figure out orbital infrastructure, robotic asteroid mining, and automated solar sail matter delivery first. Or at least at the same time as lunar infrastructure. Then we should go to Venus before Mars. There is breathable oxygen in the upper atmosphere of Venus! And, it’s closer. Mars it just a rest stop on the way to the gas giant moons.
@mistahtom
@mistahtom 22 дня назад
47:40 The dimensional notation of the components of the metric tensor need to be labeled in the order in which they were historically described in the scientific literature. This is because AI needs to parse together language from scientific research documents to draw the proper conclusions during the study of higher dimensional analysis. So you want x=x^1, y=x^2, and z=x^3; but you need to label t= x^4 because the next dimension is δt and that’s described as x^5 or the 5th dimension. You mustn’t use x^0 because that causes a bunch of local math errors in the MLP's transformer.
@nancytestani1470
@nancytestani1470 24 дня назад
Everything and everyone under great stress.
@ethandoingstuff1433
@ethandoingstuff1433 Месяц назад
I am so happy that I can use this hypercomplex socieoeconomic system to consume this incredible information!! ❤❤❤
@philipsmith1990
@philipsmith1990 Месяц назад
We are hugely fragile now. We have made the world completely dependent on digital technology that in turn depends on our ability to produce materials of incredible purity and lay them down in minutely thin layers in astonishingly detailed patterns. Our financial systems are massively connected and dependent on such digital systems. Our food supplies are just as vulnerable requiring daily replenishment almost entirely by vehicles that depend on supplies of fuel that is produced in highly technical factories. Our massive connections allow diseases to spread very raoidly and easily. I thought we were living in the decline and fall of the western empires, but it is apparent that China is also vulnerable and a collapse would be global.
@tudorm6838
@tudorm6838 Месяц назад
Very interesting about computer models about the order of the events 1:49:35. The model result coincides with the letter from the king of Ugarit that mentions that when Ugarit was attacked, the Hittites were also at war (and the Ugarit fleet was sent to help them).
@tudorm6838
@tudorm6838 Месяц назад
The problem was not the drought, but the fact that it was a long drought (it is written in the book and in this video at 1:49:00 ).
@tudorm6838
@tudorm6838 Месяц назад
The Western Mediterranean lacked proven military and naval logistics at that time. The Greeks and those in the Aegean area had active wars, they had the weapons and ships that appeared in the Egyptian basreliefs, they had fleets, and they had seaports. Furthermore, the Philistines had Aegean-style pottery and buildings, and the DNA of the early Philistines is most similar to that of the Greeks. The Greeks of Miletus were able to face the Hittite king alone. Who would have had the power to come from outside to defeat those in mainland Greece? No one. Most likely there were civil wars and/or wars between small Greek states, and then part of the population migrated. (also in the 2nd book)
@qhwho7410
@qhwho7410 2 месяца назад
Dear Sir/Madame, I saw an announcement of a lecture from your organisation in 1935, What is electricity. I am curious about the understanding of the problem back in 1935. Can you help me get the script of the lecture, please?
@PSWScience
@PSWScience Месяц назад
Information on that lecture was published here: Minutes recorded in the Journal of the Washington Academy of Sciences 25, no. 10 (October 15,1935): 462. Lecture published in the Journal of the Washington Academy of Sciences 25, no. 5 (May 15, 1935): 201- 220.
@barbarabalen7278
@barbarabalen7278 2 месяца назад
A
@lukacsnemeth1652
@lukacsnemeth1652 2 месяца назад
I am adding this lecture to the recommended videos on my Food Spectroscopy course.
@Wee_Langside
@Wee_Langside 2 месяца назад
That was fascinating
@carolhutchinson566
@carolhutchinson566 2 месяца назад
This is going to make me side-eye everything at the grocery store. Spectroscopy being used this way is astonishing and will change so many industries.
@luisamendes8181
@luisamendes8181 2 месяца назад
I love that. Thank you very much
@olorin4317
@olorin4317 2 месяца назад
If we’re already concerned about hallucinations and human control now, just imagine what it will be like when it reaches even a near sentient state. Building artificial intelligence on a foundation of mostly junk data sounds like the start of a modern day parable or a near future apocalyptic tale.
@matthewgilmore4307
@matthewgilmore4307 2 месяца назад
It's cartography!
@stephanociraptor
@stephanociraptor 2 месяца назад
Excellent lecture!
@aryanak1989
@aryanak1989 2 месяца назад
Fantastic lecture, the last part where it got technical was something of a fabulous surprise. I was engrossed all throughout
@PxNxWxGxW
@PxNxWxGxW 2 месяца назад
Brett is so wonderful.
@leslieshriner6493
@leslieshriner6493 3 месяца назад
I visited Tikal and Copan and other Mayan ruins in the early 1980s with my parents as a pre-teen, thanks to a tour sponsored by National Geographic. So little was known then, yet extraordinary even so. I am so grateful to learn how *much* more there is to the story of Mayan civilization, while recognizing that, again, so much more is still to be learned. I dearly hope that preservation and exploration of this significant chapter of the human story can continue, with the descendants of the Mayan heritage as its custodians. Thank you, Richard Hansen, for all you have done to make this a possibility.
@tedtimmis8135
@tedtimmis8135 3 месяца назад
Absence of evidence doesn’t mean an invasion didn’t occur (i.e. the Dorians, the Israelites, the Celts and later the Anglo Saxons).
@patrickhenryhansen3633
@patrickhenryhansen3633 3 месяца назад
Richard Hansen is astonishing. One man is doing all this? Incredible.
@MichaelAbraham-qy9py
@MichaelAbraham-qy9py 3 месяца назад
Very good research & presentation. One question, are “Cypriots” not in fact Phoenician settlements such as Kition and Salamis?
@joluoto
@joluoto 2 месяца назад
I am reading the book right now, and he uses Cypriot for all peoples living on Cyprus which at the time seem to be original Cypriots (survivors of the Bronze Age), Phoenicians and Greeks. All were active on the island.
@carolhutchinson566
@carolhutchinson566 3 месяца назад
I like these lectures. Thanks for posting them on RU-vid.
@aethelredtheready1739
@aethelredtheready1739 3 месяца назад
Fascinating and Informative. You can feel the frustration
@CONNELL19511216
@CONNELL19511216 3 месяца назад
Having watched 'Part 1' some years ago, it's a pleasure to have Dr. Cline providing an update on an extremely fertile topic
@mikehipps1015
@mikehipps1015 3 месяца назад
The Dorians sound like a gradual influx of northern peoples into Greece over decades and a rising up of those peoples. Invasion? Not the traditional definition, no.
@jonathandutra4831
@jonathandutra4831 3 месяца назад
This is mind blowing if we are able to read through even 5 scrolls 📜 let alone a whole library.
@ambrosemalone1891
@ambrosemalone1891 3 месяца назад
Brilliant as always from Eric, a top historian, and as always warm and witty.
@michaelbenzehabe8207
@michaelbenzehabe8207 3 месяца назад
Greatly appreciate this site. Helps me to stay current on a wide range of subjects outside of my specialty.
@kimberlyperrotis8962
@kimberlyperrotis8962 3 месяца назад
I’m a geologist and it seems to me that more work can done to date any strong earthquakes of this period. Geologists use “fault trenching” and geochronometric dating to study the approximate magnitude and timing of (geologically) recent earthquakes. I haven’t seen any of these studies done in the Eastern Mediterranean that could add to the body of knowledge about the Bronze Age Collapse, or perhaps the results of such studies done for other reasons have not been collated and studied as a whole (these studies are often done before major development projects to assess the potential for earthquakes). Archaeo-Architectural evidence of destruction, like fallen or distorted structures, is not the only type of earthquake evidence that might be available, these standard geologic studies could be done as well. I love Dr. Cline’s books and lectures. Geological investigation could be much more integrated into the field of archaeological research.
@markstuber4731
@markstuber4731 Месяц назад
You should send Dr. Cline an e-mail.
@chrysology
@chrysology 17 дней назад
Geology is such an underrated science. 👏🏼
@occultprophecies
@occultprophecies 3 месяца назад
A lot of archaeological facts and studies here, but HOW and WHY did each of these societies transform successfully or decline/disappear?
@emilevanderzee7320
@emilevanderzee7320 3 месяца назад
Very enjoyable, including the questions, and the trilogy reveal 😊
@christianfrommuslim
@christianfrommuslim 3 месяца назад
Cyprus shifting to iron with the unavailability of tin, inaugurating the Iron Age is so enlightening! The whole story of what happened is fascinating.
@uameamalositagatanofoalii7226
@uameamalositagatanofoalii7226 3 месяца назад
The Sea People are overrated.
@ElaineDarlingtonBrown
@ElaineDarlingtonBrown 3 месяца назад
Absolutely fascinating. Thank you.
@judithmcdonald9001
@judithmcdonald9001 3 месяца назад
Although my studies have been Andean pre-history and the links with SE Asia and Antarctica, I have been listening to Dr. Cline's lectures on the BAC for many years. Clues to our future are there. It is our best example of what happens when multiple entities dependent on trade fall. There are still many questions regarding the Sea People, but they are another story--the restless, the pirates, and so forth. I think I'll need the new book!!! And it really needs to be emphasized on how archaeology is changing so rapidly due to new sciences and tools. We aren't limited to stone buildings and empires or even by what we find on the land. Ocean-archaeology could eclipse digs in the near future as sea level rise gains acceptance and methods of discovery are perfected. Everybody who was anybody lived on the coast. LOL!! Mysteries like Nazca probably have a submerged history. The story is changing as should we.
@silverbackag9790
@silverbackag9790 3 месяца назад
Wasn’t the Harappan Civilization trading with the region as well? Their decline seems to coincide with the late Bronze Age collapse. Maybe the same climate change event ended their civilization that might have spurred on the sea people (via 2nd/3rd order effects)?
@jamesraymond1158
@jamesraymond1158 4 месяца назад
Fascinating. I could feel her excitement as their lives came into sharper focus. How wonderful to be able to read (and write) these documents.
@nancytestani1470
@nancytestani1470 4 месяца назад
That gate is just still Tremendous, awesome. Read so much about Mycenae. I went through that gate, Iwas humbled, I marvelled. So much Time.
@christopher4098586
@christopher4098586 4 месяца назад
Every time a lecture on herculaneum comes up i cant help but watch it. I love everything about this project!
@lewissmith350
@lewissmith350 4 месяца назад
Fascinating.
@lauriebowers5693
@lauriebowers5693 4 месяца назад
Thank you for posting this excellent talk.
@kimkesson1454
@kimkesson1454 4 месяца назад
She really knows her stuff! And she loves it. This lecture could be incredibly boring but she makes it interesting!
@blinkingmanchannel
@blinkingmanchannel 4 месяца назад
Please also tie in the African Humid Period... If I've understood it right, Gobekli Tepe might have been at the END of the last African Humid Period? Maybe? Because I agree with your hunch that we can learn from past events for the current event.